diff --git a/sdk/core/src/util.rs b/sdk/core/src/util.rs
index 5ac66483a3..fb32cacb2b 100644
--- a/sdk/core/src/util.rs
+++ b/sdk/core/src/util.rs
@@ -15,3 +15,55 @@ where
         .or_else(|_| T::deserialize(serde_json::Value::String(v.to_lowercase())))
         .map_err(de::Error::custom)
 }
+
+/// Deserialize JSON null as default
+/// https://github.com/serde-rs/serde/issues/1098
+pub fn deserialize_null_as_default<'de, D, T>(deserializer: D) -> Result<T, D::Error>
+where
+    T: Default + Deserialize<'de>,
+    D: Deserializer<'de>,
+{
+    let opt = Option::deserialize(deserializer)?;
+    Ok(opt.unwrap_or_default())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use serde::Serialize;
+
+    #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
+    pub struct SiteConfig {
+        #[serde(
+            rename = "appSettings",
+            default,
+            deserialize_with = "deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
+        pub app_settings: Vec<NameValuePair>,
+    }
+
+    #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
+    pub struct NameValuePair {
+        #[serde(default, skip_serializing_if = "Option::is_none")]
+        pub name: Option<String>,
+        #[serde(default, skip_serializing_if = "Option::is_none")]
+        pub value: Option<String>,
+    }
+
+    #[test]
+    fn deserialize_empty() -> crate::Result<()> {
+        let bytes = br#"{}"#;
+        let site_config: SiteConfig = serde_json::from_slice(bytes)?;
+        assert_eq!(Vec::<NameValuePair>::default(), site_config.app_settings);
+        Ok(())
+    }
+
+    #[test]
+    fn deserialize_null() -> crate::Result<()> {
+        let bytes = br#"{ "appSettings": null }"#;
+        let site_config: SiteConfig = serde_json::from_slice(bytes)?;
+        assert_eq!(Vec::<NameValuePair>::default(), site_config.app_settings);
+        Ok(())
+    }
+}
diff --git a/services/autorust/codegen/src/codegen_models.rs b/services/autorust/codegen/src/codegen_models.rs
index 2b0251dc72..7514afcd74 100644
--- a/services/autorust/codegen/src/codegen_models.rs
+++ b/services/autorust/codegen/src/codegen_models.rs
@@ -707,7 +707,7 @@ fn create_struct(cg: &CodeGen, schema: &SchemaGen, struct_name: &str, pageable:
                 // Must specify `default` when using `with` for `Option`
                 serde_attrs.push(quote! { default, with = "azure_core::date::rfc1123::option"});
             } else if type_name.is_vec() {
-                serde_attrs.push(quote! { default, skip_serializing_if = "Vec::is_empty"});
+                serde_attrs.push(quote! { default, deserialize_with = "azure_core::util::deserialize_null_as_default", skip_serializing_if = "Vec::is_empty"});
             } else {
                 serde_attrs.push(quote! { default, skip_serializing_if = "Option::is_none"});
             }
diff --git a/services/mgmt/activedirectory/src/package_2017_04_01/models.rs b/services/mgmt/activedirectory/src/package_2017_04_01/models.rs
index af2b1007e6..64a0341ce1 100644
--- a/services/mgmt/activedirectory/src/package_2017_04_01/models.rs
+++ b/services/mgmt/activedirectory/src/package_2017_04_01/models.rs
@@ -22,7 +22,11 @@ pub struct DiagnosticSettings {
     #[serde(rename = "eventHubName", default, skip_serializing_if = "Option::is_none")]
     pub event_hub_name: Option<String>,
     #[doc = "The list of logs settings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logs: Vec<LogSettings>,
 }
 impl DiagnosticSettings {
@@ -98,7 +102,11 @@ impl DiagnosticSettingsCategoryResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticSettingsCategoryResourceCollection {
     #[doc = "The collection of diagnostic settings category resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiagnosticSettingsCategoryResource>,
 }
 impl DiagnosticSettingsCategoryResourceCollection {
@@ -124,7 +132,11 @@ impl DiagnosticSettingsResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticSettingsResourceCollection {
     #[doc = "The collection of diagnostic settings resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiagnosticSettingsResource>,
 }
 impl DiagnosticSettingsResourceCollection {
@@ -166,7 +178,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -272,7 +288,11 @@ impl OperationsDiscovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsDiscoveryCollection {
     #[doc = "The ClientDiscovery details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDiscovery>,
 }
 impl OperationsDiscoveryCollection {
diff --git a/services/mgmt/activedirectory/src/package_2020_03/models.rs b/services/mgmt/activedirectory/src/package_2020_03/models.rs
index 664c000fd3..bd9a555ee2 100644
--- a/services/mgmt/activedirectory/src/package_2020_03/models.rs
+++ b/services/mgmt/activedirectory/src/package_2020_03/models.rs
@@ -49,7 +49,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -105,7 +109,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "URL to next page of results"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -241,7 +249,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -265,7 +277,12 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -347,7 +364,11 @@ pub struct PrivateLinkPolicy {
     #[serde(rename = "allTenants", default, skip_serializing_if = "Option::is_none")]
     pub all_tenants: Option<bool>,
     #[doc = "The list of tenantIds."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tenants: Vec<String>,
     #[doc = "Name of the private link policy resource"]
     #[serde(rename = "resourceName", default, skip_serializing_if = "Option::is_none")]
@@ -371,7 +392,11 @@ impl PrivateLinkPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkPolicyListResult {
     #[doc = "Array of private link policies"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkPolicy>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/activedirectory/src/package_preview_2017_04/models.rs b/services/mgmt/activedirectory/src/package_preview_2017_04/models.rs
index 382ee5a0e2..0c7f374796 100644
--- a/services/mgmt/activedirectory/src/package_preview_2017_04/models.rs
+++ b/services/mgmt/activedirectory/src/package_preview_2017_04/models.rs
@@ -22,7 +22,11 @@ pub struct DiagnosticSettings {
     #[serde(rename = "eventHubName", default, skip_serializing_if = "Option::is_none")]
     pub event_hub_name: Option<String>,
     #[doc = "The list of logs settings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logs: Vec<LogSettings>,
 }
 impl DiagnosticSettings {
@@ -98,7 +102,11 @@ impl DiagnosticSettingsCategoryResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticSettingsCategoryResourceCollection {
     #[doc = "The collection of diagnostic settings category resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiagnosticSettingsCategoryResource>,
 }
 impl DiagnosticSettingsCategoryResourceCollection {
@@ -124,7 +132,11 @@ impl DiagnosticSettingsResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticSettingsResourceCollection {
     #[doc = "The collection of diagnostic settings resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiagnosticSettingsResource>,
 }
 impl DiagnosticSettingsResourceCollection {
@@ -166,7 +178,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -275,7 +291,11 @@ impl OperationsDiscovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsDiscoveryCollection {
     #[doc = "The ClientDiscovery details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDiscovery>,
 }
 impl OperationsDiscoveryCollection {
diff --git a/services/mgmt/activedirectory/src/package_preview_2020_03/models.rs b/services/mgmt/activedirectory/src/package_preview_2020_03/models.rs
index 21414efc40..558bb6283a 100644
--- a/services/mgmt/activedirectory/src/package_preview_2020_03/models.rs
+++ b/services/mgmt/activedirectory/src/package_preview_2020_03/models.rs
@@ -49,7 +49,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -93,7 +97,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -117,7 +125,12 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -140,7 +153,11 @@ pub struct PrivateLinkPolicy {
     #[serde(rename = "allTenants", default, skip_serializing_if = "Option::is_none")]
     pub all_tenants: Option<bool>,
     #[doc = "The list of tenantIds."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tenants: Vec<String>,
     #[doc = "Name of the private link policy resource"]
     #[serde(rename = "resourceName", default, skip_serializing_if = "Option::is_none")]
@@ -164,7 +181,11 @@ impl PrivateLinkPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkPolicyListResult {
     #[doc = "Array of private link policies"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkPolicy>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/activedirectory/src/package_preview_2020_07/models.rs b/services/mgmt/activedirectory/src/package_preview_2020_07/models.rs
index 8373409df6..80b403eb80 100644
--- a/services/mgmt/activedirectory/src/package_preview_2020_07/models.rs
+++ b/services/mgmt/activedirectory/src/package_preview_2020_07/models.rs
@@ -66,7 +66,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -150,7 +154,11 @@ impl AzureAdMetricsConfig {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureAdMetricsListResult {
     #[doc = "Array of AzureADMetrics resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureAdMetricsConfig>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/adhybridhealthservice/src/package_2014_01/models.rs b/services/mgmt/adhybridhealthservice/src/package_2014_01/models.rs
index 87df430a4a..f8178e50f7 100644
--- a/services/mgmt/adhybridhealthservice/src/package_2014_01/models.rs
+++ b/services/mgmt/adhybridhealthservice/src/package_2014_01/models.rs
@@ -31,7 +31,11 @@ pub struct AddsConfiguration {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Item>,
     #[doc = "The total count of configuration."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -61,7 +65,12 @@ pub struct AddsServiceMember {
     #[serde(rename = "siteName", default, skip_serializing_if = "Option::is_none")]
     pub site_name: Option<String>,
     #[doc = "The list of ADDS roles."]
-    #[serde(rename = "addsRoles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addsRoles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub adds_roles: Vec<String>,
     #[doc = "Indicates if the global catalog for this domain is reachable or not."]
     #[serde(rename = "gcReachable", default, skip_serializing_if = "Option::is_none")]
@@ -76,7 +85,12 @@ pub struct AddsServiceMember {
     #[serde(rename = "sysvolState", default, skip_serializing_if = "Option::is_none")]
     pub sysvol_state: Option<bool>,
     #[doc = "The list of domain controller types."]
-    #[serde(rename = "dcTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dcTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dc_types: Vec<String>,
     #[doc = "The id of the server."]
     #[serde(rename = "serviceMemberId", default, skip_serializing_if = "Option::is_none")]
@@ -97,7 +111,11 @@ pub struct AddsServiceMember {
     #[serde(rename = "createdDate", default, with = "azure_core::date::rfc3339::option")]
     pub created_date: Option<time::OffsetDateTime>,
     #[doc = "The server specific configuration related dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Item>,
     #[doc = "Indicates if the server is disabled or not. "]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -106,7 +124,12 @@ pub struct AddsServiceMember {
     #[serde(rename = "disabledReason", default, skip_serializing_if = "Option::is_none")]
     pub disabled_reason: Option<i64>,
     #[doc = "The list of installed QFEs for the server."]
-    #[serde(rename = "installedQfes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "installedQfes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub installed_qfes: Vec<Hotfix>,
     #[doc = "The date and time , in UTC, when the server was last disabled."]
     #[serde(rename = "lastDisabled", default, with = "azure_core::date::rfc3339::option")]
@@ -131,10 +154,20 @@ pub struct AddsServiceMember {
     #[serde(rename = "machineName", default, skip_serializing_if = "Option::is_none")]
     pub machine_name: Option<String>,
     #[doc = "The monitoring configuration of the server which determines what activities are monitored by Azure Active Directory Connect Health."]
-    #[serde(rename = "monitoringConfigurationsComputed", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monitoringConfigurationsComputed",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monitoring_configurations_computed: Vec<Item>,
     #[doc = "The customized monitoring configuration of the server which determines what activities are monitored by Azure Active Directory Connect Health."]
-    #[serde(rename = "monitoringConfigurationsCustomized", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monitoringConfigurationsCustomized",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monitoring_configurations_customized: Vec<Item>,
     #[doc = "The name of the operating system installed in the machine."]
     #[serde(rename = "osName", default, skip_serializing_if = "Option::is_none")]
@@ -143,10 +176,19 @@ pub struct AddsServiceMember {
     #[serde(rename = "osVersion", default, skip_serializing_if = "Option::is_none")]
     pub os_version: Option<String>,
     #[doc = "Server specific properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub properties: Vec<Item>,
     #[doc = "The list of recommended hotfixes for the server."]
-    #[serde(rename = "recommendedQfes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recommendedQfes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommended_qfes: Vec<Hotfix>,
     #[doc = "The total count of alerts that are resolved for this server."]
     #[serde(rename = "resolvedAlerts", default, skip_serializing_if = "Option::is_none")]
@@ -183,7 +225,11 @@ pub struct AddsServiceMembers {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AddsServiceMember>,
     #[doc = "The total count of service members."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -258,13 +304,23 @@ pub struct Alert {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub remediation: Option<String>,
     #[doc = "The help links to get more information related to the alert."]
-    #[serde(rename = "relatedLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "relatedLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub related_links: Vec<HelpLink>,
     #[doc = "The scope of the alert. Indicates if it is a service or a server related alert."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scope: Option<String>,
     #[doc = "Additional information related to the alert."]
-    #[serde(rename = "additionalInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_information: Vec<AdditionalInformation>,
     #[doc = "The date and time,in UTC,when the alert was created."]
     #[serde(rename = "createdDate", default, with = "azure_core::date::rfc3339::option")]
@@ -279,10 +335,20 @@ pub struct Alert {
     #[serde(rename = "monitorRoleType", default, skip_serializing_if = "Option::is_none")]
     pub monitor_role_type: Option<String>,
     #[doc = "The active alert properties."]
-    #[serde(rename = "activeAlertProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeAlertProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_alert_properties: Vec<Item>,
     #[doc = "The resolved alert properties."]
-    #[serde(rename = "resolvedAlertProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resolvedAlertProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resolved_alert_properties: Vec<Item>,
     #[doc = "The tenant Id."]
     #[serde(rename = "tenantId", default, skip_serializing_if = "Option::is_none")]
@@ -421,7 +487,11 @@ impl AlertFeedback {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertFeedbacks {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AlertFeedback>,
 }
 impl azure_core::Continuable for AlertFeedbacks {
@@ -439,7 +509,11 @@ impl AlertFeedbacks {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Alerts {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -511,7 +585,11 @@ impl AssociatedObject {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AttributeDelta {
     #[doc = "The delta values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<ValueDelta>,
     #[doc = "The name of the attribute delta."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -691,7 +769,12 @@ pub mod attribute_mapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AttributeMppingSource {
     #[doc = "The source attribute."]
-    #[serde(rename = "sourceAttribute", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAttribute",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_attribute: Vec<String>,
     #[doc = "The value for dn part."]
     #[serde(rename = "dnPart", default, skip_serializing_if = "Option::is_none")]
@@ -730,10 +813,19 @@ pub struct ChangeNotReimportedDelta {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub anchor: Option<String>,
     #[doc = "The delta attributes for distinguished names."]
-    #[serde(rename = "dnAttributes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnAttributes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dn_attributes: Vec<AttributeDelta>,
     #[doc = "The attributes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub attributes: Vec<AttributeDelta>,
     #[doc = "The operation type."]
     #[serde(rename = "operationType", default, skip_serializing_if = "Option::is_none")]
@@ -809,13 +901,27 @@ pub struct ChangeNotReimportedEntry {
     #[serde(rename = "primaryObjectClass", default, skip_serializing_if = "Option::is_none")]
     pub primary_object_class: Option<String>,
     #[doc = "The list of object classes."]
-    #[serde(rename = "objectClasses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "objectClasses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub object_classes: Vec<String>,
     #[doc = "The delta attributes for distinguished names."]
-    #[serde(rename = "dnAttributes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnAttributes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dn_attributes: Vec<AttributeDelta>,
     #[doc = "The attributes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub attributes: Vec<AttributeDelta>,
     #[doc = "The distinguished name."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -863,16 +969,35 @@ pub struct Connector {
     #[serde(rename = "timeLastModified", default, with = "azure_core::date::rfc3339::option")]
     pub time_last_modified: Option<time::OffsetDateTime>,
     #[doc = "The partitions of the connector."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partitions: Vec<Partition>,
     #[doc = "The run profiles of the connector."]
-    #[serde(rename = "runProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "runProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub run_profiles: Vec<RunProfile>,
     #[doc = "The class inclusion list of the connector."]
-    #[serde(rename = "classesIncluded", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classesIncluded",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classes_included: Vec<String>,
     #[doc = "The attribute inclusion list of the connector."]
-    #[serde(rename = "attributesIncluded", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "attributesIncluded",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub attributes_included: Vec<String>,
 }
 impl Connector {
@@ -917,7 +1042,11 @@ impl ConnectorConnectionError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectorConnectionErrors {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectorConnectionError>,
 }
 impl ConnectorConnectionErrors {
@@ -929,10 +1058,19 @@ impl ConnectorConnectionErrors {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectorMetadata {
     #[doc = "The list of connectors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connectors: Vec<ConnectorMetadataDetails>,
     #[doc = "The list of run profile names."]
-    #[serde(rename = "runProfileNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "runProfileNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub run_profile_names: Vec<String>,
 }
 impl ConnectorMetadata {
@@ -998,7 +1136,11 @@ pub struct ConnectorObjectError {
     #[serde(rename = "serverErrorDetail", default, skip_serializing_if = "Option::is_none")]
     pub server_error_detail: Option<String>,
     #[doc = "The value corresponding to attribute name."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl ConnectorObjectError {
@@ -1010,7 +1152,11 @@ impl ConnectorObjectError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectorObjectErrors {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectorObjectError>,
 }
 impl ConnectorObjectErrors {
@@ -1022,7 +1168,11 @@ impl ConnectorObjectErrors {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Connectors {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Connector>,
 }
 impl azure_core::Continuable for Connectors {
@@ -1046,7 +1196,12 @@ pub struct Credential {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The credential data."]
-    #[serde(rename = "credentialData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "credentialData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub credential_data: Vec<String>,
 }
 impl Credential {
@@ -1058,7 +1213,11 @@ impl Credential {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Credentials {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Credential>,
 }
 impl azure_core::Continuable for Credentials {
@@ -1076,7 +1235,11 @@ impl Credentials {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataFreshnessDetails {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Item>,
 }
 impl azure_core::Continuable for DataFreshnessDetails {
@@ -1179,7 +1342,11 @@ pub struct Dimensions {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Dimension>,
     #[doc = "The total count of dimensions."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -1239,7 +1406,11 @@ impl ErrorCount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ErrorCounts {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ErrorCount>,
 }
 impl azure_core::Continuable for ErrorCounts {
@@ -1281,7 +1452,11 @@ impl ErrorDetail {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ErrorReportUsersEntries {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ErrorReportUsersEntry>,
 }
 impl azure_core::Continuable for ErrorReportUsersEntries {
@@ -1443,7 +1618,11 @@ impl ExportError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExportErrors {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExportError>,
 }
 impl ExportErrors {
@@ -1479,7 +1658,11 @@ pub struct ExportStatuses {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExportStatus>,
     #[doc = "The total count of service elements."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -1536,10 +1719,18 @@ pub struct ForestSummary {
     #[serde(rename = "totalDcCount", default, skip_serializing_if = "Option::is_none")]
     pub total_dc_count: Option<i64>,
     #[doc = "The list of domain controller names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domains: Vec<String>,
     #[doc = "The list of site names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<String>,
 }
 impl ForestSummary {
@@ -1563,7 +1754,12 @@ pub struct GlobalConfiguration {
     #[serde(rename = "numSavedPwdEvent", default, skip_serializing_if = "Option::is_none")]
     pub num_saved_pwd_event: Option<i64>,
     #[doc = "The list of additional feature sets."]
-    #[serde(rename = "featureSet", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "featureSet",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub feature_set: Vec<Item>,
 }
 impl GlobalConfiguration {
@@ -1575,7 +1771,11 @@ impl GlobalConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GlobalConfigurations {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GlobalConfiguration>,
 }
 impl azure_core::Continuable for GlobalConfigurations {
@@ -1626,7 +1826,11 @@ impl Hotfix {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Hotfixes {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Hotfix>,
 }
 impl Hotfixes {
@@ -1733,7 +1937,11 @@ impl IpAddressAggregateSetting {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IpAddressAggregates {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IpAddressAggregate>,
     #[doc = "URL to get the next set of IP Aggregate list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1870,7 +2078,11 @@ pub mod import_error {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImportErrors {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImportError>,
 }
 impl ImportErrors {
@@ -1930,7 +2142,11 @@ impl InboundReplicationNeighbor {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InboundReplicationNeighbors {
     #[doc = "The details of inbound replication neighbors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InboundReplicationNeighbor>,
 }
 impl InboundReplicationNeighbors {
@@ -1957,7 +2173,11 @@ impl Item {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Items {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Item>,
 }
 impl azure_core::Continuable for Items {
@@ -2050,7 +2270,11 @@ impl MergedExportError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MergedExportErrors {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MergedExportError>,
 }
 impl azure_core::Continuable for MergedExportErrors {
@@ -2092,7 +2316,11 @@ pub struct MetricMetadata {
     #[serde(rename = "metricName", default, skip_serializing_if = "Option::is_none")]
     pub metric_name: Option<String>,
     #[doc = "The groupings for the metrics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groupings: Vec<MetricGroup>,
     #[doc = "The display name for the metric."]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
@@ -2131,7 +2359,11 @@ pub struct MetricMetadataList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetricMetadata>,
     #[doc = "The total count of service elements."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -2158,7 +2390,11 @@ pub struct MetricSet {
     #[serde(rename = "setName", default, skip_serializing_if = "Option::is_none")]
     pub set_name: Option<String>,
     #[doc = "The list of the metric values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<i64>,
 }
 impl MetricSet {
@@ -2170,10 +2406,19 @@ impl MetricSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricSets {
     #[doc = "The list of metric set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sets: Vec<MetricSet>,
     #[doc = "The list of timestamps for each metric in the metric set."]
-    #[serde(rename = "timeStamps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeStamps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_stamps: Vec<time::OffsetDateTime>,
 }
 impl MetricSets {
@@ -2188,7 +2433,11 @@ pub struct Metrics {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Item>,
     #[doc = "The total count of metrics."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -2230,7 +2479,11 @@ impl ModuleConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ModuleConfigurations {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ModuleConfiguration>,
 }
 impl ModuleConfigurations {
@@ -2317,7 +2570,11 @@ pub struct OperationListResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of operations supported by the Microsoft.ADHybridHealthService resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The total count of operations."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -2380,13 +2637,28 @@ pub struct PartitionScope {
     #[serde(rename = "isDefault", default, skip_serializing_if = "Option::is_none")]
     pub is_default: Option<bool>,
     #[doc = "The in-scope object classes."]
-    #[serde(rename = "objectClasses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "objectClasses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub object_classes: Vec<String>,
     #[doc = "The list of containers included."]
-    #[serde(rename = "containersIncluded", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containersIncluded",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub containers_included: Vec<String>,
     #[doc = "The list of containers excluded."]
-    #[serde(rename = "containersExcluded", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containersExcluded",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub containers_excluded: Vec<String>,
 }
 impl PartitionScope {
@@ -2494,7 +2766,11 @@ pub mod password_management_settings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationDetailsList {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationSummary>,
     #[doc = "The total count of replication detail elements."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -2557,7 +2833,12 @@ pub struct ReplicationSummary {
     #[serde(rename = "lastSuccessfulSync", default, with = "azure_core::date::rfc3339::option")]
     pub last_successful_sync: Option<time::OffsetDateTime>,
     #[doc = "List of individual domain controller neighbor's inbound replication status."]
-    #[serde(rename = "inboundNeighborCollection", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNeighborCollection",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_neighbor_collection: Vec<InboundReplicationNeighbor>,
 }
 impl ReplicationSummary {
@@ -2569,7 +2850,11 @@ impl ReplicationSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationSummaryList {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationSummary>,
 }
 impl azure_core::Continuable for ReplicationSummaryList {
@@ -2626,7 +2911,11 @@ impl RiskyIpBlobUri {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RiskyIpBlobUris {
     #[doc = "The list of blob uris."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RiskyIpBlobUri>,
 }
 impl azure_core::Continuable for RiskyIpBlobUris {
@@ -2674,7 +2963,12 @@ pub struct RunProfile {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The run steps of the run profile."]
-    #[serde(rename = "runSteps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "runSteps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub run_steps: Vec<RunStep>,
 }
 impl RunProfile {
@@ -2686,7 +2980,11 @@ impl RunProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunProfiles {
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RunProfile>,
 }
 impl RunProfiles {
@@ -2868,7 +3166,11 @@ pub struct ServiceMembers {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceMember>,
     #[doc = "The total count of service elements."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -2904,7 +3206,12 @@ pub struct ServiceProperties {
     #[serde(rename = "createdDate", default, with = "azure_core::date::rfc3339::option")]
     pub created_date: Option<time::OffsetDateTime>,
     #[doc = "The list of additional emails that are configured to receive notifications about the service."]
-    #[serde(rename = "customNotificationEmails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customNotificationEmails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_notification_emails: Vec<String>,
     #[doc = "Indicates if the service is disabled or not."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2945,7 +3252,12 @@ pub struct ServiceProperties {
     )]
     pub notification_emails_enabled_for_global_admins: Option<bool>,
     #[doc = "The list of emails to whom service notifications will be sent."]
-    #[serde(rename = "notificationEmails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationEmails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_emails: Vec<String>,
     #[doc = "Gets the original disable state."]
     #[serde(rename = "originalDisabledState", default, skip_serializing_if = "Option::is_none")]
@@ -2984,7 +3296,11 @@ pub struct Services {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The value returned by the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceProperties>,
     #[doc = "The total count of service elements."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -3062,7 +3378,12 @@ pub struct Tenant {
     #[serde(rename = "disabledReason", default, skip_serializing_if = "Option::is_none")]
     pub disabled_reason: Option<i64>,
     #[doc = "The list of global administrators for the tenant."]
-    #[serde(rename = "globalAdminsEmail", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "globalAdminsEmail",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub global_admins_email: Vec<String>,
     #[doc = "The initial domain of the tenant."]
     #[serde(rename = "initialDomain", default, skip_serializing_if = "Option::is_none")]
@@ -3116,7 +3437,12 @@ impl TenantOnboardingDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserPreference {
     #[doc = "The name of the metric."]
-    #[serde(rename = "metricNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_names: Vec<String>,
 }
 impl UserPreference {
diff --git a/services/mgmt/adp/src/package_2020_07_01_preview/models.rs b/services/mgmt/adp/src/package_2020_07_01_preview/models.rs
index 8ab4ec1728..54a4450db4 100644
--- a/services/mgmt/adp/src/package_2020_07_01_preview/models.rs
+++ b/services/mgmt/adp/src/package_2020_07_01_preview/models.rs
@@ -28,7 +28,11 @@ impl Account {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountList {
     #[doc = "List of accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -146,7 +150,11 @@ pub struct DataPoolBaseProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<data_pool_base_properties::ProvisioningState>,
     #[doc = "Gets or sets the collection of locations where Data Pool resources should be created."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<DataPoolLocation>,
     #[doc = "Metadata pertaining to creation and last modification of the resource."]
     #[serde(rename = "systemData", default, skip_serializing_if = "Option::is_none")]
@@ -209,7 +217,11 @@ pub mod data_pool_base_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataPoolList {
     #[doc = "List of data pools and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataPool>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -274,7 +286,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -352,7 +368,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Resource Provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -430,7 +450,11 @@ pub struct OperationMetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "Defines how often data for metrics becomes available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<OperationMetricAvailability>,
 }
 impl OperationMetricSpecification {
@@ -454,10 +478,20 @@ impl OperationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationServiceSpecification {
     #[doc = "Details about operations related to logs."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationLogSpecification>,
     #[doc = "Details about operations related to metrics."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetricSpecification>,
 }
 impl OperationServiceSpecification {
diff --git a/services/mgmt/adp/src/package_2021_02_01_preview/models.rs b/services/mgmt/adp/src/package_2021_02_01_preview/models.rs
index 5a2809eb56..0471499272 100644
--- a/services/mgmt/adp/src/package_2021_02_01_preview/models.rs
+++ b/services/mgmt/adp/src/package_2021_02_01_preview/models.rs
@@ -83,7 +83,11 @@ pub mod account_check_name_availability_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountList {
     #[doc = "List of accounts and their properties"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
     #[doc = "URL to get the next set of operation list results if there are any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -259,7 +263,11 @@ pub struct DataPoolBaseProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<data_pool_base_properties::ProvisioningState>,
     #[doc = "Gets or sets the collection of locations where Data Pool resources should be created"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<DataPoolLocation>,
     #[doc = "Metadata pertaining to creation and last modification of the resource."]
     #[serde(rename = "systemData", default, skip_serializing_if = "Option::is_none")]
@@ -348,7 +356,11 @@ impl DataPoolEncryption {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataPoolList {
     #[doc = "List of data pools and their properties"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataPool>,
     #[doc = "URL to get the next set of operation list results if there are any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -416,7 +428,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -494,7 +510,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Resource Provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -572,7 +592,11 @@ pub struct OperationMetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "Defines how often data for metrics becomes available"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<OperationMetricAvailability>,
 }
 impl OperationMetricSpecification {
@@ -596,10 +620,20 @@ impl OperationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationServiceSpecification {
     #[doc = "Details about operations related to logs"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationLogSpecification>,
     #[doc = "Details about operations related to metrics"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetricSpecification>,
 }
 impl OperationServiceSpecification {
diff --git a/services/mgmt/adp/src/package_2021_11_01_preview/models.rs b/services/mgmt/adp/src/package_2021_11_01_preview/models.rs
index b871704e5c..e52329f990 100644
--- a/services/mgmt/adp/src/package_2021_11_01_preview/models.rs
+++ b/services/mgmt/adp/src/package_2021_11_01_preview/models.rs
@@ -83,7 +83,11 @@ pub mod account_check_name_availability_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountList {
     #[doc = "List of accounts and their properties"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
     #[doc = "URL to get the next set of operation list results if there are any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -263,7 +267,11 @@ pub struct DataPoolBaseProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<data_pool_base_properties::ProvisioningState>,
     #[doc = "Gets or sets the collection of locations where Data Pool resources should be created"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<DataPoolLocation>,
     #[doc = "Resource tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -352,7 +360,11 @@ impl DataPoolEncryption {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataPoolList {
     #[doc = "List of data pools and their properties"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataPool>,
     #[doc = "URL to get the next set of operation list results if there are any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -434,7 +446,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -512,7 +528,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Resource Provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -590,7 +610,11 @@ pub struct OperationMetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "Defines how often data for metrics becomes available"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<OperationMetricAvailability>,
 }
 impl OperationMetricSpecification {
@@ -614,10 +638,20 @@ impl OperationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationServiceSpecification {
     #[doc = "Details about operations related to logs"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationLogSpecification>,
     #[doc = "Details about operations related to metrics"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetricSpecification>,
 }
 impl OperationServiceSpecification {
diff --git a/services/mgmt/advisor/src/package_2017_04/models.rs b/services/mgmt/advisor/src/package_2017_04/models.rs
index 870d8d94e1..1c43429f2b 100644
--- a/services/mgmt/advisor/src/package_2017_04/models.rs
+++ b/services/mgmt/advisor/src/package_2017_04/models.rs
@@ -61,7 +61,11 @@ pub mod config_data {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigData>,
     #[doc = "The link used to get the next page of configurations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -103,7 +107,11 @@ impl MetadataEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetadataEntityListResult {
     #[doc = "The list of metadata entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetadataEntity>,
     #[doc = "The link used to get the next page of metadata."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -127,13 +135,28 @@ pub struct MetadataEntityProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The list of keys on which this entity depends on."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<String>,
     #[doc = "The list of scenarios applicable to this metadata entity."]
-    #[serde(rename = "applicableScenarios", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicableScenarios",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applicable_scenarios: Vec<String>,
     #[doc = "The list of supported values."]
-    #[serde(rename = "supportedValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_values: Vec<MetadataSupportedValueDetail>,
 }
 impl MetadataEntityProperties {
@@ -199,7 +222,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
@@ -244,7 +271,12 @@ pub struct RecommendationProperties {
     #[serde(rename = "shortDescription", default, skip_serializing_if = "Option::is_none")]
     pub short_description: Option<ShortDescription>,
     #[doc = "The list of snoozed and dismissed rules for the recommendation."]
-    #[serde(rename = "suppressionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "suppressionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub suppression_ids: Vec<String>,
     #[doc = "Extended properties"]
     #[serde(rename = "extendedProperties", default, skip_serializing_if = "Option::is_none")]
@@ -418,7 +450,11 @@ pub struct ResourceRecommendationBaseListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of recommendations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceRecommendationBase>,
 }
 impl azure_core::Continuable for ResourceRecommendationBaseListResult {
@@ -468,7 +504,11 @@ pub struct SuppressionContractListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of suppressions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SuppressionContract>,
 }
 impl azure_core::Continuable for SuppressionContractListResult {
diff --git a/services/mgmt/advisor/src/package_2020_01/models.rs b/services/mgmt/advisor/src/package_2020_01/models.rs
index 75f536fa79..67fac37d08 100644
--- a/services/mgmt/advisor/src/package_2020_01/models.rs
+++ b/services/mgmt/advisor/src/package_2020_01/models.rs
@@ -59,7 +59,11 @@ pub struct ConfigDataProperties {
     #[serde(rename = "lowCpuThreshold", default, skip_serializing_if = "Option::is_none")]
     pub low_cpu_threshold: Option<config_data_properties::LowCpuThreshold>,
     #[doc = "Advisor digest configuration. Valid only for subscriptions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub digests: Vec<DigestConfig>,
 }
 impl ConfigDataProperties {
@@ -119,7 +123,11 @@ pub mod config_data_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigData>,
     #[doc = "The link used to get the next page of configurations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -149,7 +157,11 @@ pub struct DigestConfig {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub frequency: Option<i32>,
     #[doc = "Categories to send digest for. If categories are not provided, then digest will be sent for all categories."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub categories: Vec<String>,
     #[doc = "Language for digest content body. Value must be ISO 639-1 code for one of Azure portal supported languages. Otherwise, it will be converted into one. Default value is English (en)."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -228,7 +240,11 @@ impl MetadataEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetadataEntityListResult {
     #[doc = "The list of metadata entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetadataEntity>,
     #[doc = "The link used to get the next page of metadata."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -252,13 +268,28 @@ pub struct MetadataEntityProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The list of keys on which this entity depends on."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<String>,
     #[doc = "The list of scenarios applicable to this metadata entity."]
-    #[serde(rename = "applicableScenarios", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicableScenarios",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applicable_scenarios: Vec<String>,
     #[doc = "The list of supported values."]
-    #[serde(rename = "supportedValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_values: Vec<MetadataSupportedValueDetail>,
 }
 impl MetadataEntityProperties {
@@ -324,7 +355,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
@@ -369,7 +404,12 @@ pub struct RecommendationProperties {
     #[serde(rename = "shortDescription", default, skip_serializing_if = "Option::is_none")]
     pub short_description: Option<ShortDescription>,
     #[doc = "The list of snoozed and dismissed rules for the recommendation."]
-    #[serde(rename = "suppressionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "suppressionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub suppression_ids: Vec<String>,
     #[doc = "Extended properties"]
     #[serde(rename = "extendedProperties", default, skip_serializing_if = "Option::is_none")]
@@ -390,7 +430,11 @@ pub struct RecommendationProperties {
     #[serde(rename = "potentialBenefits", default, skip_serializing_if = "Option::is_none")]
     pub potential_benefits: Option<String>,
     #[doc = "The list of recommended actions to implement recommendation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<serde_json::Value>,
     #[doc = "The automated way to apply recommendation."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -591,7 +635,11 @@ pub struct ResourceRecommendationBaseListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of recommendations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceRecommendationBase>,
 }
 impl azure_core::Continuable for ResourceRecommendationBaseListResult {
@@ -641,7 +689,11 @@ pub struct SuppressionContractListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of suppressions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SuppressionContract>,
 }
 impl azure_core::Continuable for SuppressionContractListResult {
diff --git a/services/mgmt/advisor/src/package_2020_07_preview/models.rs b/services/mgmt/advisor/src/package_2020_07_preview/models.rs
index a1a2de8018..9405a8e7f3 100644
--- a/services/mgmt/advisor/src/package_2020_07_preview/models.rs
+++ b/services/mgmt/advisor/src/package_2020_07_preview/models.rs
@@ -72,7 +72,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
diff --git a/services/mgmt/advisor/src/package_2022_02_preview/models.rs b/services/mgmt/advisor/src/package_2022_02_preview/models.rs
index 096482fe3d..68f4860754 100644
--- a/services/mgmt/advisor/src/package_2022_02_preview/models.rs
+++ b/services/mgmt/advisor/src/package_2022_02_preview/models.rs
@@ -167,7 +167,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
diff --git a/services/mgmt/advisor/src/package_2022_09/models.rs b/services/mgmt/advisor/src/package_2022_09/models.rs
index 60113b8379..e80642131b 100644
--- a/services/mgmt/advisor/src/package_2022_09/models.rs
+++ b/services/mgmt/advisor/src/package_2022_09/models.rs
@@ -62,7 +62,11 @@ pub struct ConfigDataProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<config_data_properties::Duration>,
     #[doc = "Advisor digest configuration. Valid only for subscriptions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub digests: Vec<DigestConfig>,
 }
 impl ConfigDataProperties {
@@ -173,7 +177,11 @@ pub mod config_data_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigData>,
     #[doc = "The link used to get the next page of configurations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -203,7 +211,11 @@ pub struct DigestConfig {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub frequency: Option<i32>,
     #[doc = "Categories to send digest for. If categories are not provided, then digest will be sent for all categories."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub categories: Vec<String>,
     #[doc = "Language for digest content body. Value must be ISO 639-1 code for one of Azure portal supported languages. Otherwise, it will be converted into one. Default value is English (en)."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -282,7 +294,11 @@ impl MetadataEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetadataEntityListResult {
     #[doc = "The list of metadata entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetadataEntity>,
     #[doc = "The link used to get the next page of metadata."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -306,13 +322,28 @@ pub struct MetadataEntityProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The list of keys on which this entity depends on."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<String>,
     #[doc = "The list of scenarios applicable to this metadata entity."]
-    #[serde(rename = "applicableScenarios", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicableScenarios",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applicable_scenarios: Vec<String>,
     #[doc = "The list of supported values."]
-    #[serde(rename = "supportedValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_values: Vec<MetadataSupportedValueDetail>,
 }
 impl MetadataEntityProperties {
@@ -378,7 +409,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
@@ -650,7 +685,12 @@ pub struct RecommendationProperties {
     #[serde(rename = "shortDescription", default, skip_serializing_if = "Option::is_none")]
     pub short_description: Option<ShortDescription>,
     #[doc = "The list of snoozed and dismissed rules for the recommendation."]
-    #[serde(rename = "suppressionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "suppressionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub suppression_ids: Vec<String>,
     #[doc = "Extended properties"]
     #[serde(rename = "extendedProperties", default, skip_serializing_if = "Option::is_none")]
@@ -671,7 +711,11 @@ pub struct RecommendationProperties {
     #[serde(rename = "potentialBenefits", default, skip_serializing_if = "Option::is_none")]
     pub potential_benefits: Option<String>,
     #[doc = "The list of recommended actions to implement recommendation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<serde_json::Value>,
     #[doc = "The automated way to apply recommendation."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -872,7 +916,11 @@ pub struct ResourceRecommendationBaseListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of recommendations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceRecommendationBase>,
 }
 impl azure_core::Continuable for ResourceRecommendationBaseListResult {
@@ -922,7 +970,11 @@ pub struct SuppressionContractListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of suppressions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SuppressionContract>,
 }
 impl azure_core::Continuable for SuppressionContractListResult {
diff --git a/services/mgmt/agrifood/src/package_2020_05_12_preview/models.rs b/services/mgmt/agrifood/src/package_2020_05_12_preview/models.rs
index 7222497897..83c85f0202 100644
--- a/services/mgmt/agrifood/src/package_2020_05_12_preview/models.rs
+++ b/services/mgmt/agrifood/src/package_2020_05_12_preview/models.rs
@@ -83,16 +83,31 @@ pub struct DetailedInformation {
     #[serde(rename = "apiName", default, skip_serializing_if = "Option::is_none")]
     pub api_name: Option<String>,
     #[doc = "List of customParameters."]
-    #[serde(rename = "customParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_parameters: Vec<String>,
     #[doc = "List of platformParameters."]
-    #[serde(rename = "platformParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "platformParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub platform_parameters: Vec<String>,
     #[doc = "Unit systems info for the data provider."]
     #[serde(rename = "unitsSupported", default, skip_serializing_if = "Option::is_none")]
     pub units_supported: Option<UnitSystemsInfo>,
     #[doc = "List of apiInputParameters."]
-    #[serde(rename = "apiInputParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiInputParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_input_parameters: Vec<String>,
 }
 impl DetailedInformation {
@@ -128,10 +143,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -181,7 +205,11 @@ impl Extension {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionListResponse {
     #[doc = "List of requested objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Extension>,
     #[doc = "Continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -264,7 +292,11 @@ impl FarmBeatsExtension {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FarmBeatsExtensionListResponse {
     #[doc = "List of requested objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FarmBeatsExtension>,
     #[doc = "Continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -312,7 +344,12 @@ pub struct FarmBeatsExtensionProperties {
     #[serde(rename = "extensionApiDocsLink", default, skip_serializing_if = "Option::is_none")]
     pub extension_api_docs_link: Option<String>,
     #[doc = "Detailed information which shows summary of requested data.\r\nUsed in descriptive get extension metadata call.\r\nInformation for weather category per api included are apisSupported,\r\ncustomParameters, PlatformParameters and Units supported."]
-    #[serde(rename = "detailedInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "detailedInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub detailed_information: Vec<DetailedInformation>,
 }
 impl FarmBeatsExtensionProperties {
@@ -324,7 +361,11 @@ impl FarmBeatsExtensionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FarmBeatsListResponse {
     #[doc = "List of requested objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FarmBeats>,
     #[doc = "Continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -540,7 +581,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/agrifood/src/package_preview_2021_09/models.rs b/services/mgmt/agrifood/src/package_preview_2021_09/models.rs
index 268877b9a8..eb34af68ef 100644
--- a/services/mgmt/agrifood/src/package_preview_2021_09/models.rs
+++ b/services/mgmt/agrifood/src/package_preview_2021_09/models.rs
@@ -95,16 +95,31 @@ pub struct DetailedInformation {
     #[serde(rename = "apiName", default, skip_serializing_if = "Option::is_none")]
     pub api_name: Option<String>,
     #[doc = "List of customParameters."]
-    #[serde(rename = "customParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_parameters: Vec<String>,
     #[doc = "List of platformParameters."]
-    #[serde(rename = "platformParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "platformParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub platform_parameters: Vec<String>,
     #[doc = "Unit systems info for the data provider."]
     #[serde(rename = "unitsSupported", default, skip_serializing_if = "Option::is_none")]
     pub units_supported: Option<UnitSystemsInfo>,
     #[doc = "List of apiInputParameters."]
-    #[serde(rename = "apiInputParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiInputParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_input_parameters: Vec<String>,
 }
 impl DetailedInformation {
@@ -140,10 +155,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -193,7 +217,11 @@ impl Extension {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionListResponse {
     #[doc = "List of requested objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Extension>,
     #[doc = "Continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -273,7 +301,11 @@ impl FarmBeatsExtension {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FarmBeatsExtensionListResponse {
     #[doc = "List of requested objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FarmBeatsExtension>,
     #[doc = "Continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -321,7 +353,12 @@ pub struct FarmBeatsExtensionProperties {
     #[serde(rename = "extensionApiDocsLink", default, skip_serializing_if = "Option::is_none")]
     pub extension_api_docs_link: Option<String>,
     #[doc = "Detailed information which shows summary of requested data.\r\nUsed in descriptive get extension metadata call.\r\nInformation for weather category per api included are apisSupported,\r\ncustomParameters, PlatformParameters and Units supported."]
-    #[serde(rename = "detailedInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "detailedInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub detailed_information: Vec<DetailedInformation>,
 }
 impl FarmBeatsExtensionProperties {
@@ -333,7 +370,11 @@ impl FarmBeatsExtensionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FarmBeatsListResponse {
     #[doc = "List of requested objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FarmBeats>,
     #[doc = "Continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -611,7 +652,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -658,7 +703,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -792,7 +841,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -813,10 +866,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
diff --git a/services/mgmt/alertsmanagement/src/package_2019_06_preview/models.rs b/services/mgmt/alertsmanagement/src/package_2019_06_preview/models.rs
index b8faaba6aa..8c75a21890 100644
--- a/services/mgmt/alertsmanagement/src/package_2019_06_preview/models.rs
+++ b/services/mgmt/alertsmanagement/src/package_2019_06_preview/models.rs
@@ -191,7 +191,11 @@ pub struct ActionRulesList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of action rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ActionRule>,
 }
 impl azure_core::Continuable for ActionRulesList {
@@ -484,7 +488,11 @@ pub mod alert_rule_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertRulesList {
     #[doc = "List of Smart Detector alert rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AlertRule>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -532,7 +540,11 @@ pub struct Condition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<condition::Operator>,
     #[doc = "list of values to match for a given condition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl Condition {
@@ -632,10 +644,20 @@ pub struct Detector {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The Smart Detector supported resource types. By default this is not populated, unless it's specified in expandDetector"]
-    #[serde(rename = "supportedResourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedResourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_resource_types: Vec<String>,
     #[doc = "The Smart Detector image path. By default this is not populated, unless it's specified in expandDetector"]
-    #[serde(rename = "imagePaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imagePaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_paths: Vec<String>,
 }
 impl Detector {
@@ -804,7 +826,11 @@ pub struct Scope {
     #[serde(rename = "scopeType", default, skip_serializing_if = "Option::is_none")]
     pub scope_type: Option<scope::ScopeType>,
     #[doc = "list of ARM IDs of the given scope type which will be the target of the given action rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl Scope {
@@ -972,7 +998,12 @@ pub struct SuppressionSchedule {
     #[serde(rename = "endTime", default, skip_serializing_if = "Option::is_none")]
     pub end_time: Option<String>,
     #[doc = "Specifies the values for recurrence pattern"]
-    #[serde(rename = "recurrenceValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recurrenceValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recurrence_values: Vec<i64>,
 }
 impl SuppressionSchedule {
@@ -1093,7 +1124,11 @@ pub struct AlertModificationProperties {
     #[serde(rename = "alertId", default, skip_serializing_if = "Option::is_none")]
     pub alert_id: Option<String>,
     #[doc = "Modification details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub modifications: Vec<AlertModificationItem>,
 }
 impl AlertModificationProperties {
@@ -1126,7 +1161,11 @@ pub struct AlertsList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of alerts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
 }
 impl azure_core::Continuable for AlertsList {
@@ -1229,7 +1268,11 @@ pub struct AlertsSummaryGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub groupedby: Option<String>,
     #[doc = "List of the items"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<AlertsSummaryGroupItem>,
 }
 impl AlertsSummaryGroup {
@@ -1250,7 +1293,11 @@ pub struct AlertsSummaryGroupItem {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub groupedby: Option<String>,
     #[doc = "List of the items"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<AlertsSummaryGroupItem>,
 }
 impl AlertsSummaryGroupItem {
@@ -1297,7 +1344,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -1755,7 +1806,11 @@ pub struct SmartGroupModificationProperties {
     #[serde(rename = "smartGroupId", default, skip_serializing_if = "Option::is_none")]
     pub smart_group_id: Option<String>,
     #[doc = "Modification details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub modifications: Vec<SmartGroupModificationItem>,
     #[doc = "URL to fetch the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1788,25 +1843,59 @@ pub struct SmartGroupProperties {
     #[serde(rename = "lastModifiedUserName", default, skip_serializing_if = "Option::is_none")]
     pub last_modified_user_name: Option<String>,
     #[doc = "Summary of target resources in the smart group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of target resource types in the smart group"]
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of target resource groups in the smart group"]
-    #[serde(rename = "resourceGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_groups: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of monitorServices in the smart group"]
-    #[serde(rename = "monitorServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monitorServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monitor_services: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of monitorConditions in the smart group"]
-    #[serde(rename = "monitorConditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monitorConditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monitor_conditions: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of alertStates in the smart group"]
-    #[serde(rename = "alertStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alertStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alert_states: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of alertSeverities in the smart group"]
-    #[serde(rename = "alertSeverities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alertSeverities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alert_severities: Vec<SmartGroupAggregatedProperty>,
     #[doc = "The URI to fetch the next page of alerts. Call ListNext() with this URI to fetch the next page alerts."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1909,7 +1998,11 @@ pub struct SmartGroupsList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of alerts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SmartGroup>,
 }
 impl azure_core::Continuable for SmartGroupsList {
diff --git a/services/mgmt/alertsmanagement/src/package_2021_08/models.rs b/services/mgmt/alertsmanagement/src/package_2021_08/models.rs
index 678aaffeb4..c965ee5b79 100644
--- a/services/mgmt/alertsmanagement/src/package_2021_08/models.rs
+++ b/services/mgmt/alertsmanagement/src/package_2021_08/models.rs
@@ -129,7 +129,11 @@ pub struct AlertProcessingRulesList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of alert processing rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AlertProcessingRule>,
 }
 impl azure_core::Continuable for AlertProcessingRulesList {
@@ -153,7 +157,11 @@ pub struct Condition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<condition::Operator>,
     #[doc = "List of values to match for a given condition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl Condition {
@@ -517,7 +525,11 @@ pub struct Schedule {
     #[serde(rename = "timeZone", default, skip_serializing_if = "Option::is_none")]
     pub time_zone: Option<String>,
     #[doc = "List of recurrences."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recurrences: Vec<Recurrence>,
 }
 impl Schedule {
@@ -641,7 +653,11 @@ pub struct AlertModificationProperties {
     #[serde(rename = "alertId", default, skip_serializing_if = "Option::is_none")]
     pub alert_id: Option<String>,
     #[doc = "Modification details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub modifications: Vec<AlertModificationItem>,
 }
 impl AlertModificationProperties {
@@ -674,7 +690,11 @@ pub struct AlertsList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of alerts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
 }
 impl azure_core::Continuable for AlertsList {
@@ -777,7 +797,11 @@ pub struct AlertsSummaryGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub groupedby: Option<String>,
     #[doc = "List of the items"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<AlertsSummaryGroupItem>,
 }
 impl AlertsSummaryGroup {
@@ -798,7 +822,11 @@ pub struct AlertsSummaryGroupItem {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub groupedby: Option<String>,
     #[doc = "List of the items"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<AlertsSummaryGroupItem>,
 }
 impl AlertsSummaryGroupItem {
@@ -845,7 +873,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -1303,7 +1335,11 @@ pub struct SmartGroupModificationProperties {
     #[serde(rename = "smartGroupId", default, skip_serializing_if = "Option::is_none")]
     pub smart_group_id: Option<String>,
     #[doc = "Modification details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub modifications: Vec<SmartGroupModificationItem>,
     #[doc = "URL to fetch the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1336,25 +1372,59 @@ pub struct SmartGroupProperties {
     #[serde(rename = "lastModifiedUserName", default, skip_serializing_if = "Option::is_none")]
     pub last_modified_user_name: Option<String>,
     #[doc = "Summary of target resources in the smart group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of target resource types in the smart group"]
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of target resource groups in the smart group"]
-    #[serde(rename = "resourceGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_groups: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of monitorServices in the smart group"]
-    #[serde(rename = "monitorServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monitorServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monitor_services: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of monitorConditions in the smart group"]
-    #[serde(rename = "monitorConditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monitorConditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monitor_conditions: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of alertStates in the smart group"]
-    #[serde(rename = "alertStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alertStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alert_states: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of alertSeverities in the smart group"]
-    #[serde(rename = "alertSeverities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alertSeverities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alert_severities: Vec<SmartGroupAggregatedProperty>,
     #[doc = "The URI to fetch the next page of alerts. Call ListNext() with this URI to fetch the next page alerts."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1457,7 +1527,11 @@ pub struct SmartGroupsList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of alerts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SmartGroup>,
 }
 impl azure_core::Continuable for SmartGroupsList {
diff --git a/services/mgmt/alertsmanagement/src/package_preview_2019_05/models.rs b/services/mgmt/alertsmanagement/src/package_preview_2019_05/models.rs
index 9b3805608d..a87d1f5166 100644
--- a/services/mgmt/alertsmanagement/src/package_preview_2019_05/models.rs
+++ b/services/mgmt/alertsmanagement/src/package_preview_2019_05/models.rs
@@ -169,7 +169,11 @@ pub struct ActionRulesList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of action rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ActionRule>,
 }
 impl azure_core::Continuable for ActionRulesList {
@@ -190,7 +194,11 @@ pub struct Condition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<condition::Operator>,
     #[doc = "list of values to match for a given condition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl Condition {
@@ -429,7 +437,11 @@ pub struct Scope {
     #[serde(rename = "scopeType", default, skip_serializing_if = "Option::is_none")]
     pub scope_type: Option<scope::ScopeType>,
     #[doc = "list of ARM IDs of the given scope type which will be the target of the given action rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl Scope {
@@ -576,7 +588,12 @@ pub struct SuppressionSchedule {
     #[serde(rename = "endTime", default, skip_serializing_if = "Option::is_none")]
     pub end_time: Option<String>,
     #[doc = "Specifies the values for recurrence pattern"]
-    #[serde(rename = "recurrenceValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recurrenceValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recurrence_values: Vec<i64>,
 }
 impl SuppressionSchedule {
@@ -685,7 +702,11 @@ pub struct AlertModificationProperties {
     #[serde(rename = "alertId", default, skip_serializing_if = "Option::is_none")]
     pub alert_id: Option<String>,
     #[doc = "Modification details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub modifications: Vec<AlertModificationItem>,
 }
 impl AlertModificationProperties {
@@ -718,7 +739,11 @@ pub struct AlertsList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of alerts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
 }
 impl azure_core::Continuable for AlertsList {
@@ -821,7 +846,11 @@ pub struct AlertsSummaryGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub groupedby: Option<String>,
     #[doc = "List of the items"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<AlertsSummaryGroupItem>,
 }
 impl AlertsSummaryGroup {
@@ -842,7 +871,11 @@ pub struct AlertsSummaryGroupItem {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub groupedby: Option<String>,
     #[doc = "List of the items"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<AlertsSummaryGroupItem>,
 }
 impl AlertsSummaryGroupItem {
@@ -889,7 +922,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -1347,7 +1384,11 @@ pub struct SmartGroupModificationProperties {
     #[serde(rename = "smartGroupId", default, skip_serializing_if = "Option::is_none")]
     pub smart_group_id: Option<String>,
     #[doc = "Modification details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub modifications: Vec<SmartGroupModificationItem>,
     #[doc = "URL to fetch the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1380,25 +1421,59 @@ pub struct SmartGroupProperties {
     #[serde(rename = "lastModifiedUserName", default, skip_serializing_if = "Option::is_none")]
     pub last_modified_user_name: Option<String>,
     #[doc = "Summary of target resources in the smart group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of target resource types in the smart group"]
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of target resource groups in the smart group"]
-    #[serde(rename = "resourceGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_groups: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of monitorServices in the smart group"]
-    #[serde(rename = "monitorServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monitorServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monitor_services: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of monitorConditions in the smart group"]
-    #[serde(rename = "monitorConditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monitorConditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monitor_conditions: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of alertStates in the smart group"]
-    #[serde(rename = "alertStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alertStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alert_states: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of alertSeverities in the smart group"]
-    #[serde(rename = "alertSeverities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alertSeverities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alert_severities: Vec<SmartGroupAggregatedProperty>,
     #[doc = "The URI to fetch the next page of alerts. Call ListNext() with this URI to fetch the next page alerts."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1501,7 +1576,11 @@ pub struct SmartGroupsList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of alerts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SmartGroup>,
 }
 impl azure_core::Continuable for SmartGroupsList {
diff --git a/services/mgmt/alertsmanagement/src/package_preview_2021_08/models.rs b/services/mgmt/alertsmanagement/src/package_preview_2021_08/models.rs
index 678aaffeb4..c965ee5b79 100644
--- a/services/mgmt/alertsmanagement/src/package_preview_2021_08/models.rs
+++ b/services/mgmt/alertsmanagement/src/package_preview_2021_08/models.rs
@@ -129,7 +129,11 @@ pub struct AlertProcessingRulesList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of alert processing rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AlertProcessingRule>,
 }
 impl azure_core::Continuable for AlertProcessingRulesList {
@@ -153,7 +157,11 @@ pub struct Condition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<condition::Operator>,
     #[doc = "List of values to match for a given condition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl Condition {
@@ -517,7 +525,11 @@ pub struct Schedule {
     #[serde(rename = "timeZone", default, skip_serializing_if = "Option::is_none")]
     pub time_zone: Option<String>,
     #[doc = "List of recurrences."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recurrences: Vec<Recurrence>,
 }
 impl Schedule {
@@ -641,7 +653,11 @@ pub struct AlertModificationProperties {
     #[serde(rename = "alertId", default, skip_serializing_if = "Option::is_none")]
     pub alert_id: Option<String>,
     #[doc = "Modification details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub modifications: Vec<AlertModificationItem>,
 }
 impl AlertModificationProperties {
@@ -674,7 +690,11 @@ pub struct AlertsList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of alerts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
 }
 impl azure_core::Continuable for AlertsList {
@@ -777,7 +797,11 @@ pub struct AlertsSummaryGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub groupedby: Option<String>,
     #[doc = "List of the items"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<AlertsSummaryGroupItem>,
 }
 impl AlertsSummaryGroup {
@@ -798,7 +822,11 @@ pub struct AlertsSummaryGroupItem {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub groupedby: Option<String>,
     #[doc = "List of the items"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<AlertsSummaryGroupItem>,
 }
 impl AlertsSummaryGroupItem {
@@ -845,7 +873,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -1303,7 +1335,11 @@ pub struct SmartGroupModificationProperties {
     #[serde(rename = "smartGroupId", default, skip_serializing_if = "Option::is_none")]
     pub smart_group_id: Option<String>,
     #[doc = "Modification details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub modifications: Vec<SmartGroupModificationItem>,
     #[doc = "URL to fetch the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1336,25 +1372,59 @@ pub struct SmartGroupProperties {
     #[serde(rename = "lastModifiedUserName", default, skip_serializing_if = "Option::is_none")]
     pub last_modified_user_name: Option<String>,
     #[doc = "Summary of target resources in the smart group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of target resource types in the smart group"]
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of target resource groups in the smart group"]
-    #[serde(rename = "resourceGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_groups: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of monitorServices in the smart group"]
-    #[serde(rename = "monitorServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monitorServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monitor_services: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of monitorConditions in the smart group"]
-    #[serde(rename = "monitorConditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monitorConditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monitor_conditions: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of alertStates in the smart group"]
-    #[serde(rename = "alertStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alertStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alert_states: Vec<SmartGroupAggregatedProperty>,
     #[doc = "Summary of alertSeverities in the smart group"]
-    #[serde(rename = "alertSeverities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alertSeverities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alert_severities: Vec<SmartGroupAggregatedProperty>,
     #[doc = "The URI to fetch the next page of alerts. Call ListNext() with this URI to fetch the next page alerts."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1457,7 +1527,11 @@ pub struct SmartGroupsList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of alerts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SmartGroup>,
 }
 impl azure_core::Continuable for SmartGroupsList {
diff --git a/services/mgmt/analysisservices/src/package_2016_05/models.rs b/services/mgmt/analysisservices/src/package_2016_05/models.rs
index 6bf41b18cf..ae80fc382f 100644
--- a/services/mgmt/analysisservices/src/package_2016_05/models.rs
+++ b/services/mgmt/analysisservices/src/package_2016_05/models.rs
@@ -287,10 +287,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -317,7 +326,11 @@ pub struct ErrorObject {
     #[serde(rename = "timeStamp", default, skip_serializing_if = "Option::is_none")]
     pub time_stamp: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
 }
 impl ErrorObject {
@@ -395,7 +408,11 @@ pub struct MetricSpecifications {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "The dimensions of metric."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimensions>,
 }
 impl MetricSpecifications {
@@ -447,10 +464,20 @@ pub mod operation_detail {
         #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
         pub struct ServiceSpecification {
             #[doc = "The metric specifications."]
-            #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                rename = "metricSpecifications",
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub metric_specifications: Vec<MetricSpecifications>,
             #[doc = "The log specifications."]
-            #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                rename = "logSpecifications",
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub log_specifications: Vec<LogSpecifications>,
         }
         impl ServiceSpecification {
@@ -485,7 +512,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of analysis services operations supported by the Microsoft.AnalysisServices resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -646,7 +677,11 @@ pub mod resource_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerAdministrators {
     #[doc = "An array of administrator user identities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub members: Vec<String>,
 }
 impl ServerAdministrators {
@@ -673,7 +708,11 @@ impl SkuDetailsForExistingResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuEnumerationForExistingResourceResult {
     #[doc = "The collection of available SKUs for existing resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuDetailsForExistingResource>,
 }
 impl SkuEnumerationForExistingResourceResult {
@@ -685,7 +724,11 @@ impl SkuEnumerationForExistingResourceResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuEnumerationForNewResourceResult {
     #[doc = "The collection of available SKUs for new resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceSku>,
 }
 impl SkuEnumerationForNewResourceResult {
diff --git a/services/mgmt/analysisservices/src/package_2017_07/models.rs b/services/mgmt/analysisservices/src/package_2017_07/models.rs
index 8b8caf442d..feef334211 100644
--- a/services/mgmt/analysisservices/src/package_2017_07/models.rs
+++ b/services/mgmt/analysisservices/src/package_2017_07/models.rs
@@ -286,10 +286,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -327,7 +336,11 @@ pub mod error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub message: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<ErrorDetail>,
     }
     impl Error {
@@ -451,7 +464,11 @@ pub struct MetricSpecifications {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "The dimensions of metric."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimensions>,
 }
 impl MetricSpecifications {
@@ -503,10 +520,20 @@ pub mod operation_detail {
         #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
         pub struct ServiceSpecification {
             #[doc = "The metric specifications."]
-            #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                rename = "metricSpecifications",
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub metric_specifications: Vec<MetricSpecifications>,
             #[doc = "The log specifications."]
-            #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                rename = "logSpecifications",
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub log_specifications: Vec<LogSpecifications>,
         }
         impl ServiceSpecification {
@@ -541,7 +568,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of analysis services operations supported by the Microsoft.AnalysisServices resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -695,7 +726,11 @@ pub mod resource_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerAdministrators {
     #[doc = "An array of administrator user identities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub members: Vec<String>,
 }
 impl ServerAdministrators {
@@ -722,7 +757,11 @@ impl SkuDetailsForExistingResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuEnumerationForExistingResourceResult {
     #[doc = "The collection of available SKUs for existing resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuDetailsForExistingResource>,
 }
 impl SkuEnumerationForExistingResourceResult {
@@ -734,7 +773,11 @@ impl SkuEnumerationForExistingResourceResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuEnumerationForNewResourceResult {
     #[doc = "The collection of available SKUs for new resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceSku>,
 }
 impl SkuEnumerationForNewResourceResult {
diff --git a/services/mgmt/analysisservices/src/package_2017_08_beta/models.rs b/services/mgmt/analysisservices/src/package_2017_08_beta/models.rs
index f04cae6901..9ad02efefa 100644
--- a/services/mgmt/analysisservices/src/package_2017_08_beta/models.rs
+++ b/services/mgmt/analysisservices/src/package_2017_08_beta/models.rs
@@ -306,10 +306,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -347,7 +356,11 @@ pub mod error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub message: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<ErrorDetail>,
     }
     impl Error {
@@ -441,7 +454,12 @@ impl IPv4FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IPv4FirewallSettings {
     #[doc = "An array of firewall rules."]
-    #[serde(rename = "firewallRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_rules: Vec<IPv4FirewallRule>,
     #[doc = "The indicator of enabling PBI service."]
     #[serde(rename = "enablePowerBIService", default, skip_serializing_if = "Option::is_none")]
@@ -498,7 +516,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of analysis services operations supported by the Microsoft.AnalysisServices resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -641,7 +663,11 @@ pub mod resource_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerAdministrators {
     #[doc = "An array of administrator user identities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub members: Vec<String>,
 }
 impl ServerAdministrators {
@@ -665,7 +691,11 @@ impl SkuDetailsForExistingResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuEnumerationForExistingResourceResult {
     #[doc = "The collection of available SKUs for existing resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuDetailsForExistingResource>,
 }
 impl SkuEnumerationForExistingResourceResult {
@@ -677,7 +707,11 @@ impl SkuEnumerationForExistingResourceResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuEnumerationForNewResourceResult {
     #[doc = "The collection of available SKUs for new resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceSku>,
 }
 impl SkuEnumerationForNewResourceResult {
diff --git a/services/mgmt/apimanagement/src/package_preview_2019_12/models.rs b/services/mgmt/apimanagement/src/package_preview_2019_12/models.rs
index 38ef85f095..90320852c1 100644
--- a/services/mgmt/apimanagement/src/package_preview_2019_12/models.rs
+++ b/services/mgmt/apimanagement/src/package_preview_2019_12/models.rs
@@ -56,10 +56,20 @@ pub struct AdditionalLocation {
     #[doc = "API Management service resource SKU properties."]
     pub sku: ApiManagementServiceSkuProperties,
     #[doc = "Public Static Load Balanced IP addresses of the API Management service in the additional location. Available only for Basic, Standard and Premium SKU."]
-    #[serde(rename = "publicIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<String>,
     #[doc = "Private Static Load Balanced IP addresses of the API Management service which is deployed in an Internal Virtual Network in a particular additional location. Available only for Basic, Standard and Premium SKU."]
-    #[serde(rename = "privateIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ip_addresses: Vec<String>,
     #[doc = "Configuration of a virtual network to which API Management service is deployed."]
     #[serde(rename = "virtualNetworkConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -88,7 +98,11 @@ impl AdditionalLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -136,7 +150,11 @@ pub struct ApiContractProperties {
     #[doc = "Relative URL uniquely identifying this API and all of its resource paths within the API Management service instance. It is appended to the API endpoint base URL specified during the service instance creation to form a public URL for this API."]
     pub path: String,
     #[doc = "Describes on which protocols the operations in this API can be invoked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<String>,
     #[doc = "An API Version Set contains the common configuration for a set of API Versions relating "]
     #[serde(rename = "apiVersionSet", default, skip_serializing_if = "Option::is_none")]
@@ -170,7 +188,11 @@ pub struct ApiContractUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Describes on which protocols the operations in this API can be invoked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<String>,
 }
 impl ApiContractUpdateProperties {
@@ -576,25 +598,49 @@ pub struct ApiManagementServiceBaseProperties {
     #[serde(rename = "developerPortalUrl", default, skip_serializing_if = "Option::is_none")]
     pub developer_portal_url: Option<String>,
     #[doc = "Custom hostname configuration of the API Management service."]
-    #[serde(rename = "hostnameConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostnameConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hostname_configurations: Vec<HostnameConfiguration>,
     #[doc = "Public Static Load Balanced IP addresses of the API Management service in Primary region. Available only for Basic, Standard and Premium SKU."]
-    #[serde(rename = "publicIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<String>,
     #[doc = "Private Static Load Balanced IP addresses of the API Management service in Primary region which is deployed in an Internal Virtual Network. Available only for Basic, Standard and Premium SKU."]
-    #[serde(rename = "privateIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ip_addresses: Vec<String>,
     #[doc = "Configuration of a virtual network to which API Management service is deployed."]
     #[serde(rename = "virtualNetworkConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub virtual_network_configuration: Option<VirtualNetworkConfiguration>,
     #[doc = "Additional datacenter locations of the API Management service."]
-    #[serde(rename = "additionalLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_locations: Vec<AdditionalLocation>,
     #[doc = "Custom properties of the API Management service.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Ciphers.TripleDes168` will disable the cipher TLS_RSA_WITH_3DES_EDE_CBC_SHA for all TLS(1.0, 1.1 and 1.2).</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Protocols.Tls11` can be used to disable just TLS 1.1.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Protocols.Tls10` can be used to disable TLS 1.0 on an API Management service.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Backend.Protocols.Tls11` can be used to disable just TLS 1.1 for communications with backends.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Backend.Protocols.Tls10` can be used to disable TLS 1.0 for communications with backends.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Protocols.Server.Http2` can be used to enable HTTP2 protocol on an API Management service.</br>Not specifying any of these properties on PATCH operation will reset omitted properties' values to their defaults. For all the settings except Http2 the default value is `True` if the service was created on or before April 1st 2018 and `False` otherwise. Http2 setting's default value is `False`.</br></br>You can disable any of next ciphers by using settings `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Ciphers.[cipher_name]`: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA. For example, `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Ciphers.TLS_RSA_WITH_AES_128_CBC_SHA256`:`false`. The default value is `true` for them.  Note: next ciphers can't be disabled since they are required by Azure CloudService internal components: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,TLS_RSA_WITH_AES_256_GCM_SHA384"]
     #[serde(rename = "customProperties", default, skip_serializing_if = "Option::is_none")]
     pub custom_properties: Option<serde_json::Value>,
     #[doc = "List of Certificates that need to be installed in the API Management service. Max supported certificates that can be installed is 10."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<CertificateConfiguration>,
     #[doc = "Property only meant to be used for Consumption SKU Service. This enforces a client certificate to be presented on each request to the gateway. This also enables the ability to authenticate the certificate in the policy on the gateway."]
     #[serde(rename = "enableClientCertificate", default, skip_serializing_if = "Option::is_none")]
@@ -957,7 +1003,11 @@ impl ApiManagementServiceUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiReleaseCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiReleaseContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1013,7 +1063,11 @@ impl ApiReleaseContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiRevisionCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiRevisionContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1102,7 +1156,11 @@ pub struct ApiTagResourceContractProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Describes on which protocols the operations in this API can be invoked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<String>,
 }
 impl ApiTagResourceContractProperties {
@@ -1138,7 +1196,11 @@ impl ApiVersionConstraint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiVersionSetCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiVersionSetContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1436,7 +1498,11 @@ impl AuthenticationSettingsContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationServerCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AuthorizationServerContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1477,13 +1543,28 @@ pub struct AuthorizationServerContractBaseProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "HTTP verbs supported by the authorization endpoint. GET must be always present. POST is optional."]
-    #[serde(rename = "authorizationMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_methods: Vec<String>,
     #[doc = "Method of authentication supported by the token endpoint of this authorization server. Possible values are Basic and/or Body. When Body is specified, client credentials and other parameters are passed within the request body in the application/x-www-form-urlencoded format."]
-    #[serde(rename = "clientAuthenticationMethod", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientAuthenticationMethod",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_authentication_method: Vec<String>,
     #[doc = "Additional parameters required by the token endpoint of this authorization server represented as an array of JSON objects with name and value string properties, i.e. {\"name\" : \"name value\", \"value\": \"a value\"}."]
-    #[serde(rename = "tokenBodyParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tokenBodyParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub token_body_parameters: Vec<TokenBodyParameterContract>,
     #[doc = "OAuth token endpoint. Contains absolute URI to entity being referenced."]
     #[serde(rename = "tokenEndpoint", default, skip_serializing_if = "Option::is_none")]
@@ -1495,7 +1576,12 @@ pub struct AuthorizationServerContractBaseProperties {
     #[serde(rename = "defaultScope", default, skip_serializing_if = "Option::is_none")]
     pub default_scope: Option<String>,
     #[doc = "Specifies the mechanism by which access token is passed to the API. "]
-    #[serde(rename = "bearerTokenSendingMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bearerTokenSendingMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bearer_token_sending_methods: Vec<String>,
     #[doc = "Can be optionally specified when resource owner password grant type is supported by this authorization server. Default resource owner username."]
     #[serde(rename = "resourceOwnerUsername", default, skip_serializing_if = "Option::is_none")]
@@ -1581,7 +1667,12 @@ pub struct AuthorizationServerUpdateContractProperties {
     #[serde(rename = "authorizationEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub authorization_endpoint: Option<String>,
     #[doc = "Form of an authorization grant, which the client uses to request the access token."]
-    #[serde(rename = "grantTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "grantTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub grant_types: Vec<String>,
     #[doc = "Client or app id registered with this authorization server."]
     #[serde(rename = "clientId", default, skip_serializing_if = "Option::is_none")]
@@ -1642,7 +1733,11 @@ impl BackendBaseParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendCollection {
     #[doc = "Backend values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackendContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1738,7 +1833,11 @@ pub mod backend_contract_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendCredentialsContract {
     #[doc = "List of Client Certificate Thumbprint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate: Vec<String>,
     #[doc = "Query Parameter description."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1827,10 +1926,20 @@ pub struct BackendServiceFabricClusterProperties {
     #[serde(rename = "managementEndpoints")]
     pub management_endpoints: Vec<String>,
     #[doc = "Thumbprints of certificates cluster management service uses for tls communication"]
-    #[serde(rename = "serverCertificateThumbprints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverCertificateThumbprints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_certificate_thumbprints: Vec<String>,
     #[doc = "Server X509 Certificate Names Collection"]
-    #[serde(rename = "serverX509Names", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverX509Names",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_x509_names: Vec<X509CertificateName>,
 }
 impl BackendServiceFabricClusterProperties {
@@ -1987,7 +2096,11 @@ impl BodyDiagnosticSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CacheCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CacheContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2074,7 +2187,11 @@ impl CacheUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2325,7 +2442,11 @@ impl DeployConfigurationParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiagnosticContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2523,7 +2644,11 @@ pub mod diagnostic_contract_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EmailTemplateCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EmailTemplateContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2571,7 +2696,11 @@ pub struct EmailTemplateContractProperties {
     #[serde(rename = "isDefault", default, skip_serializing_if = "Option::is_none")]
     pub is_default: Option<bool>,
     #[doc = "Email Template Parameter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<EmailTemplateParametersContractProperties>,
 }
 impl EmailTemplateContractProperties {
@@ -2620,7 +2749,11 @@ pub struct EmailTemplateUpdateParameterProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub body: Option<String>,
     #[doc = "Email Template Parameter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<EmailTemplateParametersContractProperties>,
 }
 impl EmailTemplateUpdateParameterProperties {
@@ -2686,7 +2819,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The list of invalid fields send in request, in case of validation error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorFieldContract>,
 }
 impl ErrorResponseBody {
@@ -2698,7 +2835,11 @@ impl ErrorResponseBody {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2748,7 +2889,11 @@ impl GatewayContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayHostnameConfigurationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayHostnameConfigurationContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2894,7 +3039,11 @@ impl GenerateSsoUrlResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GroupCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3157,7 +3306,11 @@ pub mod hostname_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HttpMessageDiagnostic {
     #[doc = "Array of HTTP Headers to log."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<String>,
     #[doc = "Body logging settings."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3178,7 +3331,12 @@ pub struct IdentityProviderBaseParameters {
     #[serde(rename = "signinTenant", default, skip_serializing_if = "Option::is_none")]
     pub signin_tenant: Option<String>,
     #[doc = "List of Allowed Tenants when configuring Azure Active Directory login."]
-    #[serde(rename = "allowedTenants", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedTenants",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_tenants: Vec<String>,
     #[doc = "OpenID Connect discovery endpoint hostname for AAD or AAD B2C."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3329,7 +3487,11 @@ impl IdentityProviderCreateContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IdentityProviderList {
     #[doc = "Identity Provider configuration values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IdentityProviderContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3379,7 +3541,11 @@ impl IdentityProviderUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IssueAttachmentCollection {
     #[doc = "Issue Attachment values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IssueAttachmentContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3434,7 +3600,11 @@ impl IssueAttachmentContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IssueCollection {
     #[doc = "Issue values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IssueContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3455,7 +3625,11 @@ impl IssueCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IssueCommentCollection {
     #[doc = "Issue Comment values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IssueCommentContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3649,7 +3823,11 @@ impl IssueUpdateContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoggerCollection {
     #[doc = "Logger values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoggerContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3833,7 +4011,11 @@ pub mod logger_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NamedValueCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NamedValueContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3923,7 +4105,11 @@ impl NamedValueCreateContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NamedValueEntityBaseParameters {
     #[doc = "Optional tags that when provided can be used to filter the NamedValue list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Determines whether the value is a secret and should be encrypted or not. Default value is false."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4000,7 +4186,11 @@ impl NetworkStatusContractByLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotificationContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4074,7 +4264,12 @@ pub struct OpenIdAuthenticationSettingsContract {
     #[serde(rename = "openidProviderId", default, skip_serializing_if = "Option::is_none")]
     pub openid_provider_id: Option<String>,
     #[doc = "How to send token to the server."]
-    #[serde(rename = "bearerTokenSendingMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bearerTokenSendingMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bearer_token_sending_methods: Vec<BearerTokenSendingMethodsContract>,
 }
 impl OpenIdAuthenticationSettingsContract {
@@ -4086,7 +4281,11 @@ impl OpenIdAuthenticationSettingsContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OpenIdConnectProviderCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OpenidConnectProviderContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4232,7 +4431,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4291,7 +4494,12 @@ impl OperationContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationEntityBaseContract {
     #[doc = "Collection of URL template parameters."]
-    #[serde(rename = "templateParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "templateParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub template_parameters: Vec<ParameterContract>,
     #[doc = "Description of the operation. May include HTML formatting tags."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4300,7 +4508,11 @@ pub struct OperationEntityBaseContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub request: Option<RequestContract>,
     #[doc = "Array of Operation responses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub responses: Vec<ResponseContract>,
     #[doc = "Operation Policies"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4315,7 +4527,11 @@ impl OperationEntityBaseContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4354,7 +4570,12 @@ pub struct OperationResultContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub error: Option<ErrorResponseBody>,
     #[doc = "This property if only provided as part of the TenantConfiguration_Validate operation. It contains the log the entities which will be updated/created/deleted as part of the TenantConfiguration_Deploy operation."]
-    #[serde(rename = "actionLog", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionLog",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub action_log: Vec<OperationResultLogItemContract>,
 }
 impl OperationResultContract {
@@ -4474,7 +4695,11 @@ pub struct ParameterContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub required: Option<bool>,
     #[doc = "Parameter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl ParameterContract {
@@ -4508,7 +4733,11 @@ impl PipelineDiagnosticSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyCollection {
     #[doc = "Policy Contract value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4604,7 +4833,11 @@ pub mod policy_contract_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyDescriptionCollection {
     #[doc = "Descriptions of APIM policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyDescriptionContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4750,7 +4983,11 @@ impl PortalSignupSettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProductCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProductContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4898,7 +5135,11 @@ impl PropertyValueContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaCounterCollection {
     #[doc = "Quota counter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaCounterContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4978,7 +5219,11 @@ impl QuotaCounterValueContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecipientEmailCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecipientEmailContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5019,7 +5264,11 @@ impl RecipientEmailContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecipientUserCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecipientUserContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5060,10 +5309,18 @@ impl RecipientUsersContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecipientsContractProperties {
     #[doc = "List of Emails subscribed for the notification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
     #[doc = "List of Users subscribed for the notification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub users: Vec<String>,
 }
 impl RecipientsContractProperties {
@@ -5093,7 +5350,11 @@ impl RegionContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegionListResult {
     #[doc = "Lists of Regions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5129,7 +5390,11 @@ impl RegistrationDelegationSettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReportCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReportRecordContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5252,7 +5517,12 @@ pub struct RepresentationContract {
     #[serde(rename = "typeName", default, skip_serializing_if = "Option::is_none")]
     pub type_name: Option<String>,
     #[doc = "Collection of form parameters. Required if 'contentType' value is either 'application/x-www-form-urlencoded' or 'multipart/form-data'.."]
-    #[serde(rename = "formParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "formParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub form_parameters: Vec<ParameterContract>,
 }
 impl RepresentationContract {
@@ -5273,13 +5543,26 @@ pub struct RequestContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Collection of operation request query parameters."]
-    #[serde(rename = "queryParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "queryParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub query_parameters: Vec<ParameterContract>,
     #[doc = "Collection of operation request headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ParameterContract>,
     #[doc = "Collection of operation request representations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub representations: Vec<RepresentationContract>,
 }
 impl RequestContract {
@@ -5291,7 +5574,11 @@ impl RequestContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RequestReportCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RequestReportRecordContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5586,10 +5873,18 @@ pub struct ResponseContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Collection of operation response representations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub representations: Vec<RepresentationContract>,
     #[doc = "Collection of operation response headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ParameterContract>,
 }
 impl ResponseContract {
@@ -5686,7 +5981,11 @@ impl SaveConfigurationParameterProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SchemaCollection {
     #[doc = "Api Schema Contract value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SchemaContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5754,7 +6053,11 @@ impl SchemaDocumentProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6045,7 +6348,11 @@ impl SubscriptionsDelegationSettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6122,7 +6429,11 @@ impl TagDescriptionBaseProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagDescriptionCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagDescriptionContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6186,7 +6497,11 @@ impl TagDescriptionCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagResourceCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagResourceContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6308,7 +6623,11 @@ impl TokenBodyParameterContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6357,7 +6676,11 @@ pub struct UserContractProperties {
     #[serde(rename = "registrationDate", default, with = "azure_core::date::rfc3339::option")]
     pub registration_date: Option<time::OffsetDateTime>,
     #[doc = "Collection of groups user is part of."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<GroupContractProperties>,
 }
 impl UserContractProperties {
@@ -6501,7 +6824,11 @@ pub struct UserEntityBaseParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub note: Option<String>,
     #[doc = "Collection of user identities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identities: Vec<UserIdentityContract>,
 }
 impl UserEntityBaseParameters {
@@ -6566,7 +6893,11 @@ pub mod user_entity_base_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserIdentityCollection {
     #[doc = "User Identity values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserIdentityContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/apimanagement/src/package_preview_2020_06/models.rs b/services/mgmt/apimanagement/src/package_preview_2020_06/models.rs
index a31362c096..b490f36dec 100644
--- a/services/mgmt/apimanagement/src/package_preview_2020_06/models.rs
+++ b/services/mgmt/apimanagement/src/package_preview_2020_06/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessInformationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessInformationContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -145,13 +149,27 @@ pub struct AdditionalLocation {
     #[doc = "API Management service resource SKU properties."]
     pub sku: ApiManagementServiceSkuProperties,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Public Static Load Balanced IP addresses of the API Management service in the additional location. Available only for Basic, Standard, Premium and Isolated SKU."]
-    #[serde(rename = "publicIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<String>,
     #[doc = "Private Static Load Balanced IP addresses of the API Management service which is deployed in an Internal Virtual Network in a particular additional location. Available only for Basic, Standard, Premium and Isolated SKU."]
-    #[serde(rename = "privateIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ip_addresses: Vec<String>,
     #[doc = "Configuration of a virtual network to which API Management service is deployed."]
     #[serde(rename = "virtualNetworkConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -181,7 +199,11 @@ impl AdditionalLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -232,7 +254,11 @@ pub struct ApiContractProperties {
     #[doc = "Relative URL uniquely identifying this API and all of its resource paths within the API Management service instance. It is appended to the API endpoint base URL specified during the service instance creation to form a public URL for this API."]
     pub path: String,
     #[doc = "Describes on which protocols the operations in this API can be invoked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<String>,
     #[doc = "An API Version Set contains the common configuration for a set of API Versions relating "]
     #[serde(rename = "apiVersionSet", default, skip_serializing_if = "Option::is_none")]
@@ -266,7 +292,11 @@ pub struct ApiContractUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Describes on which protocols the operations in this API can be invoked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<String>,
 }
 impl ApiContractUpdateProperties {
@@ -672,25 +702,49 @@ pub struct ApiManagementServiceBaseProperties {
     #[serde(rename = "developerPortalUrl", default, skip_serializing_if = "Option::is_none")]
     pub developer_portal_url: Option<String>,
     #[doc = "Custom hostname configuration of the API Management service."]
-    #[serde(rename = "hostnameConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostnameConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hostname_configurations: Vec<HostnameConfiguration>,
     #[doc = "Public Static Load Balanced IP addresses of the API Management service in Primary region. Available only for Basic, Standard, Premium and Isolated SKU."]
-    #[serde(rename = "publicIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<String>,
     #[doc = "Private Static Load Balanced IP addresses of the API Management service in Primary region which is deployed in an Internal Virtual Network. Available only for Basic, Standard, Premium and Isolated SKU."]
-    #[serde(rename = "privateIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ip_addresses: Vec<String>,
     #[doc = "Configuration of a virtual network to which API Management service is deployed."]
     #[serde(rename = "virtualNetworkConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub virtual_network_configuration: Option<VirtualNetworkConfiguration>,
     #[doc = "Additional datacenter locations of the API Management service."]
-    #[serde(rename = "additionalLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_locations: Vec<AdditionalLocation>,
     #[doc = "Custom properties of the API Management service.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Ciphers.TripleDes168` will disable the cipher TLS_RSA_WITH_3DES_EDE_CBC_SHA for all TLS(1.0, 1.1 and 1.2).</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Protocols.Tls11` can be used to disable just TLS 1.1.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Protocols.Tls10` can be used to disable TLS 1.0 on an API Management service.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Backend.Protocols.Tls11` can be used to disable just TLS 1.1 for communications with backends.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Backend.Protocols.Tls10` can be used to disable TLS 1.0 for communications with backends.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Protocols.Server.Http2` can be used to enable HTTP2 protocol on an API Management service.</br>Not specifying any of these properties on PATCH operation will reset omitted properties' values to their defaults. For all the settings except Http2 the default value is `True` if the service was created on or before April 1st 2018 and `False` otherwise. Http2 setting's default value is `False`.</br></br>You can disable any of next ciphers by using settings `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Ciphers.[cipher_name]`: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA. For example, `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Ciphers.TLS_RSA_WITH_AES_128_CBC_SHA256`:`false`. The default value is `true` for them.  Note: next ciphers can't be disabled since they are required by Azure CloudService internal components: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,TLS_RSA_WITH_AES_256_GCM_SHA384"]
     #[serde(rename = "customProperties", default, skip_serializing_if = "Option::is_none")]
     pub custom_properties: Option<serde_json::Value>,
     #[doc = "List of Certificates that need to be installed in the API Management service. Max supported certificates that can be installed is 10."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<CertificateConfiguration>,
     #[doc = "Property only meant to be used for Consumption SKU Service. This enforces a client certificate to be presented on each request to the gateway. This also enables the ability to authenticate the certificate in the policy on the gateway."]
     #[serde(rename = "enableClientCertificate", default, skip_serializing_if = "Option::is_none")]
@@ -953,7 +1007,11 @@ pub struct ApiManagementServiceResource {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ApiManagementServiceResource {
@@ -1095,22 +1153,48 @@ pub struct ApiManagementSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<ApiManagementSkuCapacity>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "A list of locations and availability zones in those locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ApiManagementSkuLocationInfo>,
     #[doc = "The api versions that support this SKU."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Metadata for retrieving price info."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<ApiManagementSkuCosts>,
     #[doc = "A name value pair to describe the capability."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ApiManagementSkuCapabilities>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ApiManagementSkuRestrictions>,
 }
 impl ApiManagementSku {
@@ -1188,10 +1272,19 @@ pub struct ApiManagementSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "List of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ApiManagementSkuZoneDetails>,
 }
 impl ApiManagementSkuLocationInfo {
@@ -1202,10 +1295,18 @@ impl ApiManagementSkuLocationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiManagementSkuRestrictionInfo {
     #[doc = "Locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "List of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ApiManagementSkuRestrictionInfo {
@@ -1220,7 +1321,11 @@ pub struct ApiManagementSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<api_management_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
     pub restriction_info: Option<ApiManagementSkuRestrictionInfo>,
@@ -1252,10 +1357,18 @@ pub mod api_management_sku_restrictions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiManagementSkuZoneDetails {
     #[doc = "The set of zones that the SKU is available in with the specified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
     #[doc = "A list of capabilities that are available for the SKU in the specified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ApiManagementSkuCapabilities>,
 }
 impl ApiManagementSkuZoneDetails {
@@ -1287,7 +1400,11 @@ impl ApiManagementSkusResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiReleaseCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiReleaseContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1346,7 +1463,11 @@ impl ApiReleaseContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiRevisionCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiRevisionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1438,7 +1559,11 @@ pub struct ApiTagResourceContractProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Describes on which protocols the operations in this API can be invoked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<String>,
 }
 impl ApiTagResourceContractProperties {
@@ -1474,7 +1599,11 @@ impl ApiVersionConstraint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiVersionSetCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiVersionSetContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1775,7 +1904,11 @@ impl AuthenticationSettingsContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationServerCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AuthorizationServerContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1816,13 +1949,28 @@ pub struct AuthorizationServerContractBaseProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "HTTP verbs supported by the authorization endpoint. GET must be always present. POST is optional."]
-    #[serde(rename = "authorizationMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_methods: Vec<String>,
     #[doc = "Method of authentication supported by the token endpoint of this authorization server. Possible values are Basic and/or Body. When Body is specified, client credentials and other parameters are passed within the request body in the application/x-www-form-urlencoded format."]
-    #[serde(rename = "clientAuthenticationMethod", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientAuthenticationMethod",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_authentication_method: Vec<String>,
     #[doc = "Additional parameters required by the token endpoint of this authorization server represented as an array of JSON objects with name and value string properties, i.e. {\"name\" : \"name value\", \"value\": \"a value\"}."]
-    #[serde(rename = "tokenBodyParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tokenBodyParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub token_body_parameters: Vec<TokenBodyParameterContract>,
     #[doc = "OAuth token endpoint. Contains absolute URI to entity being referenced."]
     #[serde(rename = "tokenEndpoint", default, skip_serializing_if = "Option::is_none")]
@@ -1834,7 +1982,12 @@ pub struct AuthorizationServerContractBaseProperties {
     #[serde(rename = "defaultScope", default, skip_serializing_if = "Option::is_none")]
     pub default_scope: Option<String>,
     #[doc = "Specifies the mechanism by which access token is passed to the API. "]
-    #[serde(rename = "bearerTokenSendingMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bearerTokenSendingMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bearer_token_sending_methods: Vec<String>,
     #[doc = "Can be optionally specified when resource owner password grant type is supported by this authorization server. Default resource owner username."]
     #[serde(rename = "resourceOwnerUsername", default, skip_serializing_if = "Option::is_none")]
@@ -1938,7 +2091,12 @@ pub struct AuthorizationServerUpdateContractProperties {
     #[serde(rename = "authorizationEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub authorization_endpoint: Option<String>,
     #[doc = "Form of an authorization grant, which the client uses to request the access token."]
-    #[serde(rename = "grantTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "grantTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub grant_types: Vec<String>,
     #[doc = "Client or app id registered with this authorization server."]
     #[serde(rename = "clientId", default, skip_serializing_if = "Option::is_none")]
@@ -1999,7 +2157,11 @@ impl BackendBaseParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendCollection {
     #[doc = "Backend values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackendContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2098,10 +2260,19 @@ pub mod backend_contract_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendCredentialsContract {
     #[doc = "List of Client Certificate Ids."]
-    #[serde(rename = "certificateIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_ids: Vec<String>,
     #[doc = "List of Client Certificate Thumbprints. Will be ignored if certificatesIds are provided."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate: Vec<String>,
     #[doc = "Query Parameter description."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2193,10 +2364,20 @@ pub struct BackendServiceFabricClusterProperties {
     #[serde(rename = "managementEndpoints")]
     pub management_endpoints: Vec<String>,
     #[doc = "Thumbprints of certificates cluster management service uses for tls communication"]
-    #[serde(rename = "serverCertificateThumbprints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverCertificateThumbprints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_certificate_thumbprints: Vec<String>,
     #[doc = "Server X509 Certificate Names Collection"]
-    #[serde(rename = "serverX509Names", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverX509Names",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_x509_names: Vec<X509CertificateName>,
 }
 impl BackendServiceFabricClusterProperties {
@@ -2354,7 +2535,11 @@ impl BodyDiagnosticSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CacheCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CacheContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2451,7 +2636,11 @@ impl CacheUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2698,7 +2887,11 @@ pub mod connectivity_status_contract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContentItemCollection {
     #[doc = "Collection of content items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContentItemContract>,
     #[doc = "Next page link, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2739,7 +2932,11 @@ impl ContentItemContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContentTypeCollection {
     #[doc = "Collection of content types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContentTypeContract>,
     #[doc = "Next page link, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2795,10 +2992,19 @@ impl ContentTypeContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataMasking {
     #[doc = "Masking settings for Url query parameters"]
-    #[serde(rename = "queryParams", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "queryParams",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub query_params: Vec<DataMaskingEntity>,
     #[doc = "Masking settings for headers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<DataMaskingEntity>,
 }
 impl DataMasking {
@@ -2897,7 +3103,11 @@ impl DeletedServiceContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedServicesCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedServiceContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2944,7 +3154,11 @@ impl DeployConfigurationParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiagnosticContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3190,7 +3404,11 @@ pub mod diagnostic_contract_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EmailTemplateCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EmailTemplateContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3241,7 +3459,11 @@ pub struct EmailTemplateContractProperties {
     #[serde(rename = "isDefault", default, skip_serializing_if = "Option::is_none")]
     pub is_default: Option<bool>,
     #[doc = "Email Template Parameter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<EmailTemplateParametersContractProperties>,
 }
 impl EmailTemplateContractProperties {
@@ -3290,7 +3512,11 @@ pub struct EmailTemplateUpdateParameterProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub body: Option<String>,
     #[doc = "Email Template Parameter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<EmailTemplateParametersContractProperties>,
 }
 impl EmailTemplateUpdateParameterProperties {
@@ -3356,7 +3582,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The list of invalid fields send in request, in case of validation error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorFieldContract>,
 }
 impl ErrorResponseBody {
@@ -3368,7 +3598,11 @@ impl ErrorResponseBody {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCertificateAuthorityCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayCertificateAuthorityContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3415,7 +3649,11 @@ impl GatewayCertificateAuthorityContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3468,7 +3706,11 @@ impl GatewayContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayHostnameConfigurationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayHostnameConfigurationContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3623,7 +3865,11 @@ impl GenerateSsoUrlResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GroupCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3893,7 +4139,11 @@ pub mod hostname_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HttpMessageDiagnostic {
     #[doc = "Array of HTTP Headers to log."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<String>,
     #[doc = "Body logging settings."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3916,7 +4166,12 @@ pub struct IdentityProviderBaseParameters {
     #[serde(rename = "signinTenant", default, skip_serializing_if = "Option::is_none")]
     pub signin_tenant: Option<String>,
     #[doc = "List of Allowed Tenants when configuring Azure Active Directory login."]
-    #[serde(rename = "allowedTenants", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedTenants",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_tenants: Vec<String>,
     #[doc = "OpenID Connect discovery endpoint hostname for AAD or AAD B2C."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4067,7 +4322,11 @@ impl IdentityProviderCreateContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IdentityProviderList {
     #[doc = "Identity Provider configuration values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IdentityProviderContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4120,7 +4379,11 @@ impl IdentityProviderUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IssueAttachmentCollection {
     #[doc = "Issue Attachment values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IssueAttachmentContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4178,7 +4441,11 @@ impl IssueAttachmentContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IssueCollection {
     #[doc = "Issue values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IssueContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4202,7 +4469,11 @@ impl IssueCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IssueCommentCollection {
     #[doc = "Issue Comment values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IssueCommentContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4446,7 +4717,11 @@ impl KeyVaultLastAccessStatusContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoggerCollection {
     #[doc = "Logger values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoggerContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4637,7 +4912,11 @@ pub mod logger_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NamedValueCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NamedValueContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4739,7 +5018,11 @@ impl NamedValueCreateContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NamedValueEntityBaseParameters {
     #[doc = "Optional tags that when provided can be used to filter the NamedValue list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Determines whether the value is a secret and should be encrypted or not. Default value is false."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4831,7 +5114,11 @@ impl NetworkStatusContractByLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotificationContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4908,7 +5195,12 @@ pub struct OpenIdAuthenticationSettingsContract {
     #[serde(rename = "openidProviderId", default, skip_serializing_if = "Option::is_none")]
     pub openid_provider_id: Option<String>,
     #[doc = "How to send token to the server."]
-    #[serde(rename = "bearerTokenSendingMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bearerTokenSendingMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bearer_token_sending_methods: Vec<BearerTokenSendingMethodsContract>,
 }
 impl OpenIdAuthenticationSettingsContract {
@@ -4920,7 +5212,11 @@ impl OpenIdAuthenticationSettingsContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OpenIdConnectProviderCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OpenidConnectProviderContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5069,7 +5365,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5131,7 +5431,12 @@ impl OperationContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationEntityBaseContract {
     #[doc = "Collection of URL template parameters."]
-    #[serde(rename = "templateParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "templateParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub template_parameters: Vec<ParameterContract>,
     #[doc = "Description of the operation. May include HTML formatting tags."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5140,7 +5445,11 @@ pub struct OperationEntityBaseContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub request: Option<RequestContract>,
     #[doc = "Array of Operation responses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub responses: Vec<ResponseContract>,
     #[doc = "Operation Policies"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5155,7 +5464,11 @@ impl OperationEntityBaseContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5194,7 +5507,12 @@ pub struct OperationResultContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub error: Option<ErrorResponseBody>,
     #[doc = "This property if only provided as part of the TenantConfiguration_Validate operation. It contains the log the entities which will be updated/created/deleted as part of the TenantConfiguration_Deploy operation."]
-    #[serde(rename = "actionLog", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionLog",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub action_log: Vec<OperationResultLogItemContract>,
 }
 impl OperationResultContract {
@@ -5314,7 +5632,11 @@ pub struct ParameterContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub required: Option<bool>,
     #[doc = "Parameter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl ParameterContract {
@@ -5348,7 +5670,11 @@ impl PipelineDiagnosticSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyCollection {
     #[doc = "Policy Contract value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5447,7 +5773,11 @@ pub mod policy_contract_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyDescriptionCollection {
     #[doc = "Descriptions of APIM policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyDescriptionContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5526,7 +5856,11 @@ impl PortalDelegationSettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PortalRevisionCollection {
     #[doc = "Collection of portal revisions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PortalRevisionContract>,
     #[doc = "Next page link, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5646,7 +5980,11 @@ impl PortalSettingValidationKeyContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PortalSettingsCollection {
     #[doc = "Descriptions of APIM policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PortalSettingsContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5757,7 +6095,11 @@ impl PortalSignupSettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProductCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProductContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5896,7 +6238,11 @@ impl ProductUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaCounterCollection {
     #[doc = "Quota counter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaCounterContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5988,7 +6334,11 @@ impl QuotaCounterValueUpdateContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecipientEmailCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecipientEmailContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6032,7 +6382,11 @@ impl RecipientEmailContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecipientUserCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecipientUserContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6076,10 +6430,18 @@ impl RecipientUsersContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecipientsContractProperties {
     #[doc = "List of Emails subscribed for the notification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
     #[doc = "List of Users subscribed for the notification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub users: Vec<String>,
 }
 impl RecipientsContractProperties {
@@ -6109,7 +6471,11 @@ impl RegionContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegionListResult {
     #[doc = "Lists of Regions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6145,7 +6511,11 @@ impl RegistrationDelegationSettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReportCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReportRecordContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6268,7 +6638,12 @@ pub struct RepresentationContract {
     #[serde(rename = "typeName", default, skip_serializing_if = "Option::is_none")]
     pub type_name: Option<String>,
     #[doc = "Collection of form parameters. Required if 'contentType' value is either 'application/x-www-form-urlencoded' or 'multipart/form-data'.."]
-    #[serde(rename = "formParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "formParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub form_parameters: Vec<ParameterContract>,
 }
 impl RepresentationContract {
@@ -6289,13 +6664,26 @@ pub struct RequestContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Collection of operation request query parameters."]
-    #[serde(rename = "queryParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "queryParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub query_parameters: Vec<ParameterContract>,
     #[doc = "Collection of operation request headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ParameterContract>,
     #[doc = "Collection of operation request representations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub representations: Vec<RepresentationContract>,
 }
 impl RequestContract {
@@ -6307,7 +6695,11 @@ impl RequestContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RequestReportCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RequestReportRecordContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6604,10 +6996,18 @@ pub struct ResponseContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Collection of operation response representations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub representations: Vec<RepresentationContract>,
     #[doc = "Collection of operation response headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ParameterContract>,
 }
 impl ResponseContract {
@@ -6704,7 +7104,11 @@ impl SaveConfigurationParameterProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SchemaCollection {
     #[doc = "Api Schema Contract value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SchemaContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6775,7 +7179,11 @@ impl SchemaDocumentProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7069,7 +7477,11 @@ impl SubscriptionsDelegationSettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7149,7 +7561,11 @@ impl TagDescriptionBaseProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagDescriptionCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagDescriptionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7216,7 +7632,11 @@ impl TagDescriptionCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagResourceCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagResourceContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7310,7 +7730,11 @@ impl TenantConfigurationSyncStateContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TenantSettingsCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TenantSettingsContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7388,7 +7812,11 @@ impl TokenBodyParameterContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7440,7 +7868,11 @@ pub struct UserContractProperties {
     #[serde(rename = "registrationDate", default, with = "azure_core::date::rfc3339::option")]
     pub registration_date: Option<time::OffsetDateTime>,
     #[doc = "Collection of groups user is part of."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<GroupContractProperties>,
 }
 impl UserContractProperties {
@@ -7587,7 +8019,11 @@ pub struct UserEntityBaseParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub note: Option<String>,
     #[doc = "Collection of user identities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identities: Vec<UserIdentityContract>,
 }
 impl UserEntityBaseParameters {
@@ -7652,7 +8088,11 @@ pub mod user_entity_base_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserIdentityCollection {
     #[doc = "User Identity values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserIdentityContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/apimanagement/src/package_preview_2021_01/models.rs b/services/mgmt/apimanagement/src/package_preview_2021_01/models.rs
index 8daa01249c..2e3d1f0d70 100644
--- a/services/mgmt/apimanagement/src/package_preview_2021_01/models.rs
+++ b/services/mgmt/apimanagement/src/package_preview_2021_01/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessInformationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessInformationContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -148,13 +152,27 @@ pub struct AdditionalLocation {
     #[doc = "API Management service resource SKU properties."]
     pub sku: ApiManagementServiceSkuProperties,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Public Static Load Balanced IP addresses of the API Management service in the additional location. Available only for Basic, Standard, Premium and Isolated SKU."]
-    #[serde(rename = "publicIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<String>,
     #[doc = "Private Static Load Balanced IP addresses of the API Management service which is deployed in an Internal Virtual Network in a particular additional location. Available only for Basic, Standard, Premium and Isolated SKU."]
-    #[serde(rename = "privateIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ip_addresses: Vec<String>,
     #[doc = "Public Standard SKU IP V4 based IP address to be associated with Virtual Network deployed service in the location. Supported only for Premium SKU being deployed in Virtual Network."]
     #[serde(rename = "publicIpAddressId", default, skip_serializing_if = "Option::is_none")]
@@ -188,7 +206,11 @@ impl AdditionalLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -257,7 +279,11 @@ pub struct ApiContractProperties {
     #[doc = "Relative URL uniquely identifying this API and all of its resource paths within the API Management service instance. It is appended to the API endpoint base URL specified during the service instance creation to form a public URL for this API."]
     pub path: String,
     #[doc = "Describes on which protocols the operations in this API can be invoked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<String>,
     #[doc = "An API Version Set contains the common configuration for a set of API Versions relating "]
     #[serde(rename = "apiVersionSet", default, skip_serializing_if = "Option::is_none")]
@@ -291,7 +317,11 @@ pub struct ApiContractUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Describes on which protocols the operations in this API can be invoked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<String>,
 }
 impl ApiContractUpdateProperties {
@@ -727,13 +757,28 @@ pub struct ApiManagementServiceBaseProperties {
     #[serde(rename = "developerPortalUrl", default, skip_serializing_if = "Option::is_none")]
     pub developer_portal_url: Option<String>,
     #[doc = "Custom hostname configuration of the API Management service."]
-    #[serde(rename = "hostnameConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostnameConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hostname_configurations: Vec<HostnameConfiguration>,
     #[doc = "Public Static Load Balanced IP addresses of the API Management service in Primary region. Available only for Basic, Standard, Premium and Isolated SKU."]
-    #[serde(rename = "publicIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<String>,
     #[doc = "Private Static Load Balanced IP addresses of the API Management service in Primary region which is deployed in an Internal Virtual Network. Available only for Basic, Standard, Premium and Isolated SKU."]
-    #[serde(rename = "privateIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ip_addresses: Vec<String>,
     #[doc = "Public Standard SKU IP V4 based IP address to be associated with Virtual Network deployed service in the region. Supported only for Developer and Premium SKU being deployed in Virtual Network."]
     #[serde(rename = "publicIpAddressId", default, skip_serializing_if = "Option::is_none")]
@@ -742,13 +787,22 @@ pub struct ApiManagementServiceBaseProperties {
     #[serde(rename = "virtualNetworkConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub virtual_network_configuration: Option<VirtualNetworkConfiguration>,
     #[doc = "Additional datacenter locations of the API Management service."]
-    #[serde(rename = "additionalLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_locations: Vec<AdditionalLocation>,
     #[doc = "Custom properties of the API Management service.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Ciphers.TripleDes168` will disable the cipher TLS_RSA_WITH_3DES_EDE_CBC_SHA for all TLS(1.0, 1.1 and 1.2).</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Protocols.Tls11` can be used to disable just TLS 1.1.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Protocols.Tls10` can be used to disable TLS 1.0 on an API Management service.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Backend.Protocols.Tls11` can be used to disable just TLS 1.1 for communications with backends.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Backend.Protocols.Tls10` can be used to disable TLS 1.0 for communications with backends.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Protocols.Server.Http2` can be used to enable HTTP2 protocol on an API Management service.</br>Not specifying any of these properties on PATCH operation will reset omitted properties' values to their defaults. For all the settings except Http2 the default value is `True` if the service was created on or before April 1st 2018 and `False` otherwise. Http2 setting's default value is `False`.</br></br>You can disable any of next ciphers by using settings `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Ciphers.[cipher_name]`: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA. For example, `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Ciphers.TLS_RSA_WITH_AES_128_CBC_SHA256`:`false`. The default value is `true` for them.  Note: next ciphers can't be disabled since they are required by Azure CloudService internal components: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,TLS_RSA_WITH_AES_256_GCM_SHA384"]
     #[serde(rename = "customProperties", default, skip_serializing_if = "Option::is_none")]
     pub custom_properties: Option<serde_json::Value>,
     #[doc = "List of Certificates that need to be installed in the API Management service. Max supported certificates that can be installed is 10."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<CertificateConfiguration>,
     #[doc = "Property only meant to be used for Consumption SKU Service. This enforces a client certificate to be presented on each request to the gateway. This also enables the ability to authenticate the certificate in the policy on the gateway."]
     #[serde(rename = "enableClientCertificate", default, skip_serializing_if = "Option::is_none")]
@@ -1011,7 +1065,11 @@ pub struct ApiManagementServiceResource {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ApiManagementServiceResource {
@@ -1106,7 +1164,11 @@ pub struct ApiManagementServiceUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ApiManagementServiceUpdateParameters {
@@ -1156,22 +1218,48 @@ pub struct ApiManagementSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<ApiManagementSkuCapacity>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "A list of locations and availability zones in those locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ApiManagementSkuLocationInfo>,
     #[doc = "The api versions that support this SKU."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Metadata for retrieving price info."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<ApiManagementSkuCosts>,
     #[doc = "A name value pair to describe the capability."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ApiManagementSkuCapabilities>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ApiManagementSkuRestrictions>,
 }
 impl ApiManagementSku {
@@ -1249,10 +1337,19 @@ pub struct ApiManagementSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "List of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ApiManagementSkuZoneDetails>,
 }
 impl ApiManagementSkuLocationInfo {
@@ -1263,10 +1360,18 @@ impl ApiManagementSkuLocationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiManagementSkuRestrictionInfo {
     #[doc = "Locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "List of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ApiManagementSkuRestrictionInfo {
@@ -1281,7 +1386,11 @@ pub struct ApiManagementSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<api_management_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
     pub restriction_info: Option<ApiManagementSkuRestrictionInfo>,
@@ -1313,10 +1422,18 @@ pub mod api_management_sku_restrictions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiManagementSkuZoneDetails {
     #[doc = "The set of zones that the SKU is available in with the specified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
     #[doc = "A list of capabilities that are available for the SKU in the specified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ApiManagementSkuCapabilities>,
 }
 impl ApiManagementSkuZoneDetails {
@@ -1348,7 +1465,11 @@ impl ApiManagementSkusResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiReleaseCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiReleaseContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1407,7 +1528,11 @@ impl ApiReleaseContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiRevisionCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiRevisionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1499,7 +1624,11 @@ pub struct ApiTagResourceContractProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Describes on which protocols the operations in this API can be invoked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<String>,
 }
 impl ApiTagResourceContractProperties {
@@ -1535,7 +1664,11 @@ impl ApiVersionConstraint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiVersionSetCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiVersionSetContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1836,7 +1969,11 @@ impl AuthenticationSettingsContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationServerCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AuthorizationServerContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1877,13 +2014,28 @@ pub struct AuthorizationServerContractBaseProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "HTTP verbs supported by the authorization endpoint. GET must be always present. POST is optional."]
-    #[serde(rename = "authorizationMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_methods: Vec<String>,
     #[doc = "Method of authentication supported by the token endpoint of this authorization server. Possible values are Basic and/or Body. When Body is specified, client credentials and other parameters are passed within the request body in the application/x-www-form-urlencoded format."]
-    #[serde(rename = "clientAuthenticationMethod", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientAuthenticationMethod",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_authentication_method: Vec<String>,
     #[doc = "Additional parameters required by the token endpoint of this authorization server represented as an array of JSON objects with name and value string properties, i.e. {\"name\" : \"name value\", \"value\": \"a value\"}."]
-    #[serde(rename = "tokenBodyParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tokenBodyParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub token_body_parameters: Vec<TokenBodyParameterContract>,
     #[doc = "OAuth token endpoint. Contains absolute URI to entity being referenced."]
     #[serde(rename = "tokenEndpoint", default, skip_serializing_if = "Option::is_none")]
@@ -1895,7 +2047,12 @@ pub struct AuthorizationServerContractBaseProperties {
     #[serde(rename = "defaultScope", default, skip_serializing_if = "Option::is_none")]
     pub default_scope: Option<String>,
     #[doc = "Specifies the mechanism by which access token is passed to the API. "]
-    #[serde(rename = "bearerTokenSendingMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bearerTokenSendingMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bearer_token_sending_methods: Vec<String>,
     #[doc = "Can be optionally specified when resource owner password grant type is supported by this authorization server. Default resource owner username."]
     #[serde(rename = "resourceOwnerUsername", default, skip_serializing_if = "Option::is_none")]
@@ -1999,7 +2156,12 @@ pub struct AuthorizationServerUpdateContractProperties {
     #[serde(rename = "authorizationEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub authorization_endpoint: Option<String>,
     #[doc = "Form of an authorization grant, which the client uses to request the access token."]
-    #[serde(rename = "grantTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "grantTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub grant_types: Vec<String>,
     #[doc = "Client or app id registered with this authorization server."]
     #[serde(rename = "clientId", default, skip_serializing_if = "Option::is_none")]
@@ -2060,7 +2222,11 @@ impl BackendBaseParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendCollection {
     #[doc = "Backend values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackendContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2159,10 +2325,19 @@ pub mod backend_contract_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendCredentialsContract {
     #[doc = "List of Client Certificate Ids."]
-    #[serde(rename = "certificateIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_ids: Vec<String>,
     #[doc = "List of Client Certificate Thumbprints. Will be ignored if certificatesIds are provided."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate: Vec<String>,
     #[doc = "Query Parameter description."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2254,10 +2429,20 @@ pub struct BackendServiceFabricClusterProperties {
     #[serde(rename = "managementEndpoints")]
     pub management_endpoints: Vec<String>,
     #[doc = "Thumbprints of certificates cluster management service uses for tls communication"]
-    #[serde(rename = "serverCertificateThumbprints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverCertificateThumbprints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_certificate_thumbprints: Vec<String>,
     #[doc = "Server X509 Certificate Names Collection"]
-    #[serde(rename = "serverX509Names", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverX509Names",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_x509_names: Vec<X509CertificateName>,
 }
 impl BackendServiceFabricClusterProperties {
@@ -2415,7 +2600,11 @@ impl BodyDiagnosticSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CacheCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CacheContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2512,7 +2701,11 @@ impl CacheUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2759,7 +2952,11 @@ pub mod connectivity_status_contract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContentItemCollection {
     #[doc = "Collection of content items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContentItemContract>,
     #[doc = "Next page link, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2800,7 +2997,11 @@ impl ContentItemContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContentTypeCollection {
     #[doc = "Collection of content types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContentTypeContract>,
     #[doc = "Next page link, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2856,10 +3057,19 @@ impl ContentTypeContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataMasking {
     #[doc = "Masking settings for Url query parameters"]
-    #[serde(rename = "queryParams", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "queryParams",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub query_params: Vec<DataMaskingEntity>,
     #[doc = "Masking settings for headers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<DataMaskingEntity>,
 }
 impl DataMasking {
@@ -2958,7 +3168,11 @@ impl DeletedServiceContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedServicesCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedServiceContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3005,7 +3219,11 @@ impl DeployConfigurationParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiagnosticContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3251,7 +3469,11 @@ pub mod diagnostic_contract_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EmailTemplateCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EmailTemplateContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3302,7 +3524,11 @@ pub struct EmailTemplateContractProperties {
     #[serde(rename = "isDefault", default, skip_serializing_if = "Option::is_none")]
     pub is_default: Option<bool>,
     #[doc = "Email Template Parameter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<EmailTemplateParametersContractProperties>,
 }
 impl EmailTemplateContractProperties {
@@ -3351,7 +3577,11 @@ pub struct EmailTemplateUpdateParameterProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub body: Option<String>,
     #[doc = "Email Template Parameter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<EmailTemplateParametersContractProperties>,
 }
 impl EmailTemplateUpdateParameterProperties {
@@ -3417,7 +3647,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The list of invalid fields send in request, in case of validation error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorFieldContract>,
 }
 impl ErrorResponseBody {
@@ -3429,7 +3663,11 @@ impl ErrorResponseBody {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCertificateAuthorityCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayCertificateAuthorityContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3476,7 +3714,11 @@ impl GatewayCertificateAuthorityContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3529,7 +3771,11 @@ impl GatewayContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayHostnameConfigurationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayHostnameConfigurationContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3684,7 +3930,11 @@ impl GenerateSsoUrlResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GroupCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4042,7 +4292,11 @@ pub mod hostname_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HttpMessageDiagnostic {
     #[doc = "Array of HTTP Headers to log."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<String>,
     #[doc = "Body logging settings."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4065,7 +4319,12 @@ pub struct IdentityProviderBaseParameters {
     #[serde(rename = "signinTenant", default, skip_serializing_if = "Option::is_none")]
     pub signin_tenant: Option<String>,
     #[doc = "List of Allowed Tenants when configuring Azure Active Directory login."]
-    #[serde(rename = "allowedTenants", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedTenants",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_tenants: Vec<String>,
     #[doc = "OpenID Connect discovery endpoint hostname for AAD or AAD B2C."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4216,7 +4475,11 @@ impl IdentityProviderCreateContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IdentityProviderList {
     #[doc = "Identity Provider configuration values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IdentityProviderContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4269,7 +4532,11 @@ impl IdentityProviderUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IssueAttachmentCollection {
     #[doc = "Issue Attachment values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IssueAttachmentContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4327,7 +4594,11 @@ impl IssueAttachmentContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IssueCollection {
     #[doc = "Issue values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IssueContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4351,7 +4622,11 @@ impl IssueCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IssueCommentCollection {
     #[doc = "Issue Comment values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IssueCommentContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4595,7 +4870,11 @@ impl KeyVaultLastAccessStatusContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoggerCollection {
     #[doc = "Logger values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoggerContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4786,7 +5065,11 @@ pub mod logger_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NamedValueCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NamedValueContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4888,7 +5171,11 @@ impl NamedValueCreateContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NamedValueEntityBaseParameters {
     #[doc = "Optional tags that when provided can be used to filter the NamedValue list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Determines whether the value is a secret and should be encrypted or not. Default value is false."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4980,7 +5267,11 @@ impl NetworkStatusContractByLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotificationContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5057,7 +5348,12 @@ pub struct OpenIdAuthenticationSettingsContract {
     #[serde(rename = "openidProviderId", default, skip_serializing_if = "Option::is_none")]
     pub openid_provider_id: Option<String>,
     #[doc = "How to send token to the server."]
-    #[serde(rename = "bearerTokenSendingMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bearerTokenSendingMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bearer_token_sending_methods: Vec<BearerTokenSendingMethodsContract>,
 }
 impl OpenIdAuthenticationSettingsContract {
@@ -5069,7 +5365,11 @@ impl OpenIdAuthenticationSettingsContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OpenIdConnectProviderCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OpenidConnectProviderContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5218,7 +5518,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5280,7 +5584,12 @@ impl OperationContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationEntityBaseContract {
     #[doc = "Collection of URL template parameters."]
-    #[serde(rename = "templateParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "templateParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub template_parameters: Vec<ParameterContract>,
     #[doc = "Description of the operation. May include HTML formatting tags."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5289,7 +5598,11 @@ pub struct OperationEntityBaseContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub request: Option<RequestContract>,
     #[doc = "Array of Operation responses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub responses: Vec<ResponseContract>,
     #[doc = "Operation Policies"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5304,7 +5617,11 @@ impl OperationEntityBaseContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5357,7 +5674,12 @@ pub struct OperationResultContractProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub error: Option<ErrorResponseBody>,
     #[doc = "This property if only provided as part of the TenantConfiguration_Validate operation. It contains the log the entities which will be updated/created/deleted as part of the TenantConfiguration_Deploy operation."]
-    #[serde(rename = "actionLog", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionLog",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub action_log: Vec<OperationResultLogItemContract>,
 }
 impl OperationResultContractProperties {
@@ -5477,7 +5799,11 @@ pub struct ParameterContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub required: Option<bool>,
     #[doc = "Parameter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Schema identifier."]
     #[serde(rename = "schemaId", default, skip_serializing_if = "Option::is_none")]
@@ -5552,7 +5878,11 @@ impl PipelineDiagnosticSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyCollection {
     #[doc = "Policy Contract value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5651,7 +5981,11 @@ pub mod policy_contract_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyDescriptionCollection {
     #[doc = "Descriptions of APIM policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyDescriptionContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5730,7 +6064,11 @@ impl PortalDelegationSettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PortalRevisionCollection {
     #[doc = "Collection of portal revisions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PortalRevisionContract>,
     #[doc = "Next page link, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5850,7 +6188,11 @@ impl PortalSettingValidationKeyContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PortalSettingsCollection {
     #[doc = "Descriptions of APIM policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PortalSettingsContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5961,7 +6303,11 @@ impl PortalSignupSettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProductCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProductContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6100,7 +6446,11 @@ impl ProductUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaCounterCollection {
     #[doc = "Quota counter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaCounterContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6192,7 +6542,11 @@ impl QuotaCounterValueUpdateContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecipientEmailCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecipientEmailContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6236,7 +6590,11 @@ impl RecipientEmailContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecipientUserCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecipientUserContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6280,10 +6638,18 @@ impl RecipientUsersContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecipientsContractProperties {
     #[doc = "List of Emails subscribed for the notification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
     #[doc = "List of Users subscribed for the notification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub users: Vec<String>,
 }
 impl RecipientsContractProperties {
@@ -6313,7 +6679,11 @@ impl RegionContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegionListResult {
     #[doc = "Lists of Regions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6349,7 +6719,11 @@ impl RegistrationDelegationSettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReportCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReportRecordContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6469,7 +6843,12 @@ pub struct RepresentationContract {
     #[serde(rename = "typeName", default, skip_serializing_if = "Option::is_none")]
     pub type_name: Option<String>,
     #[doc = "Collection of form parameters. Required if 'contentType' value is either 'application/x-www-form-urlencoded' or 'multipart/form-data'.."]
-    #[serde(rename = "formParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "formParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub form_parameters: Vec<ParameterContract>,
 }
 impl RepresentationContract {
@@ -6489,13 +6868,26 @@ pub struct RequestContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Collection of operation request query parameters."]
-    #[serde(rename = "queryParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "queryParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub query_parameters: Vec<ParameterContract>,
     #[doc = "Collection of operation request headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ParameterContract>,
     #[doc = "Collection of operation request representations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub representations: Vec<RepresentationContract>,
 }
 impl RequestContract {
@@ -6507,7 +6899,11 @@ impl RequestContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RequestReportCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RequestReportRecordContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6804,10 +7200,18 @@ pub struct ResponseContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Collection of operation response representations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub representations: Vec<RepresentationContract>,
     #[doc = "Collection of operation response headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ParameterContract>,
 }
 impl ResponseContract {
@@ -6904,7 +7308,11 @@ impl SaveConfigurationParameterProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SchemaCollection {
     #[doc = "API Schema Contract value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SchemaContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6968,7 +7376,11 @@ impl SchemaDocumentProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7262,7 +7674,11 @@ impl SubscriptionsDelegationSettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7342,7 +7758,11 @@ impl TagDescriptionBaseProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagDescriptionCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagDescriptionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7409,7 +7829,11 @@ impl TagDescriptionCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagResourceCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagResourceContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7518,7 +7942,11 @@ impl TenantConfigurationSyncStateContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TenantSettingsCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TenantSettingsContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7596,7 +8024,11 @@ impl TokenBodyParameterContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7648,7 +8080,11 @@ pub struct UserContractProperties {
     #[serde(rename = "registrationDate", default, with = "azure_core::date::rfc3339::option")]
     pub registration_date: Option<time::OffsetDateTime>,
     #[doc = "Collection of groups user is part of."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<GroupContractProperties>,
 }
 impl UserContractProperties {
@@ -7795,7 +8231,11 @@ pub struct UserEntityBaseParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub note: Option<String>,
     #[doc = "Collection of user identities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identities: Vec<UserIdentityContract>,
 }
 impl UserEntityBaseParameters {
@@ -7860,7 +8300,11 @@ pub mod user_entity_base_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserIdentityCollection {
     #[doc = "User Identity values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserIdentityContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/apimanagement/src/package_preview_2021_04/models.rs b/services/mgmt/apimanagement/src/package_preview_2021_04/models.rs
index 1d15ec2345..2ae6f193f0 100644
--- a/services/mgmt/apimanagement/src/package_preview_2021_04/models.rs
+++ b/services/mgmt/apimanagement/src/package_preview_2021_04/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessInformationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessInformationContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -148,13 +152,27 @@ pub struct AdditionalLocation {
     #[doc = "API Management service resource SKU properties."]
     pub sku: ApiManagementServiceSkuProperties,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Public Static Load Balanced IP addresses of the API Management service in the additional location. Available only for Basic, Standard, Premium and Isolated SKU."]
-    #[serde(rename = "publicIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<String>,
     #[doc = "Private Static Load Balanced IP addresses of the API Management service which is deployed in an Internal Virtual Network in a particular additional location. Available only for Basic, Standard, Premium and Isolated SKU."]
-    #[serde(rename = "privateIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ip_addresses: Vec<String>,
     #[doc = "Public Standard SKU IP V4 based IP address to be associated with Virtual Network deployed service in the location. Supported only for Premium SKU being deployed in Virtual Network."]
     #[serde(rename = "publicIpAddressId", default, skip_serializing_if = "Option::is_none")]
@@ -240,7 +258,11 @@ pub mod additional_location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -309,7 +331,11 @@ pub struct ApiContractProperties {
     #[doc = "Relative URL uniquely identifying this API and all of its resource paths within the API Management service instance. It is appended to the API endpoint base URL specified during the service instance creation to form a public URL for this API."]
     pub path: String,
     #[doc = "Describes on which protocols the operations in this API can be invoked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<String>,
     #[doc = "An API Version Set contains the common configuration for a set of API Versions relating "]
     #[serde(rename = "apiVersionSet", default, skip_serializing_if = "Option::is_none")]
@@ -343,7 +369,11 @@ pub struct ApiContractUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Describes on which protocols the operations in this API can be invoked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<String>,
 }
 impl ApiContractUpdateProperties {
@@ -845,13 +875,28 @@ pub struct ApiManagementServiceBaseProperties {
     #[serde(rename = "developerPortalUrl", default, skip_serializing_if = "Option::is_none")]
     pub developer_portal_url: Option<String>,
     #[doc = "Custom hostname configuration of the API Management service."]
-    #[serde(rename = "hostnameConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostnameConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hostname_configurations: Vec<HostnameConfiguration>,
     #[doc = "Public Static Load Balanced IP addresses of the API Management service in Primary region. Available only for Basic, Standard, Premium and Isolated SKU."]
-    #[serde(rename = "publicIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<String>,
     #[doc = "Private Static Load Balanced IP addresses of the API Management service in Primary region which is deployed in an Internal Virtual Network. Available only for Basic, Standard, Premium and Isolated SKU."]
-    #[serde(rename = "privateIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ip_addresses: Vec<String>,
     #[doc = "Public Standard SKU IP V4 based IP address to be associated with Virtual Network deployed service in the region. Supported only for Developer and Premium SKU being deployed in Virtual Network."]
     #[serde(rename = "publicIpAddressId", default, skip_serializing_if = "Option::is_none")]
@@ -863,13 +908,22 @@ pub struct ApiManagementServiceBaseProperties {
     #[serde(rename = "virtualNetworkConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub virtual_network_configuration: Option<VirtualNetworkConfiguration>,
     #[doc = "Additional datacenter locations of the API Management service."]
-    #[serde(rename = "additionalLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_locations: Vec<AdditionalLocation>,
     #[doc = "Custom properties of the API Management service.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Ciphers.TripleDes168` will disable the cipher TLS_RSA_WITH_3DES_EDE_CBC_SHA for all TLS(1.0, 1.1 and 1.2).</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Protocols.Tls11` can be used to disable just TLS 1.1.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Protocols.Tls10` can be used to disable TLS 1.0 on an API Management service.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Backend.Protocols.Tls11` can be used to disable just TLS 1.1 for communications with backends.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Backend.Protocols.Tls10` can be used to disable TLS 1.0 for communications with backends.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Protocols.Server.Http2` can be used to enable HTTP2 protocol on an API Management service.</br>Not specifying any of these properties on PATCH operation will reset omitted properties' values to their defaults. For all the settings except Http2 the default value is `True` if the service was created on or before April 1st 2018 and `False` otherwise. Http2 setting's default value is `False`.</br></br>You can disable any of next ciphers by using settings `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Ciphers.[cipher_name]`: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA. For example, `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Ciphers.TLS_RSA_WITH_AES_128_CBC_SHA256`:`false`. The default value is `true` for them.  Note: next ciphers can't be disabled since they are required by Azure CloudService internal components: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,TLS_RSA_WITH_AES_256_GCM_SHA384"]
     #[serde(rename = "customProperties", default, skip_serializing_if = "Option::is_none")]
     pub custom_properties: Option<serde_json::Value>,
     #[doc = "List of Certificates that need to be installed in the API Management service. Max supported certificates that can be installed is 10."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<CertificateConfiguration>,
     #[doc = "Property only meant to be used for Consumption SKU Service. This enforces a client certificate to be presented on each request to the gateway. This also enables the ability to authenticate the certificate in the policy on the gateway."]
     #[serde(rename = "enableClientCertificate", default, skip_serializing_if = "Option::is_none")]
@@ -887,7 +941,12 @@ pub struct ApiManagementServiceBaseProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub restore: Option<bool>,
     #[doc = "List of Private Endpoint Connections of this service."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<RemotePrivateEndpointConnectionWrapper>,
     #[doc = "Compute Platform Version running the service in this location."]
     #[serde(rename = "platformVersion", default, skip_serializing_if = "Option::is_none")]
@@ -1223,7 +1282,11 @@ pub struct ApiManagementServiceResource {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ApiManagementServiceResource {
@@ -1319,7 +1382,11 @@ pub struct ApiManagementServiceUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ApiManagementServiceUpdateParameters {
@@ -1369,22 +1436,48 @@ pub struct ApiManagementSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<ApiManagementSkuCapacity>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "A list of locations and availability zones in those locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ApiManagementSkuLocationInfo>,
     #[doc = "The api versions that support this SKU."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Metadata for retrieving price info."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<ApiManagementSkuCosts>,
     #[doc = "A name value pair to describe the capability."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ApiManagementSkuCapabilities>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ApiManagementSkuRestrictions>,
 }
 impl ApiManagementSku {
@@ -1462,10 +1555,19 @@ pub struct ApiManagementSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "List of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ApiManagementSkuZoneDetails>,
 }
 impl ApiManagementSkuLocationInfo {
@@ -1476,10 +1578,18 @@ impl ApiManagementSkuLocationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiManagementSkuRestrictionInfo {
     #[doc = "Locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "List of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ApiManagementSkuRestrictionInfo {
@@ -1494,7 +1604,11 @@ pub struct ApiManagementSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<api_management_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
     pub restriction_info: Option<ApiManagementSkuRestrictionInfo>,
@@ -1526,10 +1640,18 @@ pub mod api_management_sku_restrictions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiManagementSkuZoneDetails {
     #[doc = "The set of zones that the SKU is available in with the specified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
     #[doc = "A list of capabilities that are available for the SKU in the specified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ApiManagementSkuCapabilities>,
 }
 impl ApiManagementSkuZoneDetails {
@@ -1561,7 +1683,11 @@ impl ApiManagementSkusResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiReleaseCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiReleaseContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1620,7 +1746,11 @@ impl ApiReleaseContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiRevisionCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiRevisionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1698,7 +1828,11 @@ impl ApiRevisionInfoContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiSchemaCollection {
     #[doc = "API Schema Contract value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiSchemaContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1786,7 +1920,11 @@ pub struct ApiTagResourceContractProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Describes on which protocols the operations in this API can be invoked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<String>,
 }
 impl ApiTagResourceContractProperties {
@@ -1822,7 +1960,11 @@ impl ApiVersionConstraint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiVersionSetCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiVersionSetContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2134,7 +2276,11 @@ impl AuthenticationSettingsContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationServerCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AuthorizationServerContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2175,13 +2321,28 @@ pub struct AuthorizationServerContractBaseProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "HTTP verbs supported by the authorization endpoint. GET must be always present. POST is optional."]
-    #[serde(rename = "authorizationMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_methods: Vec<String>,
     #[doc = "Method of authentication supported by the token endpoint of this authorization server. Possible values are Basic and/or Body. When Body is specified, client credentials and other parameters are passed within the request body in the application/x-www-form-urlencoded format."]
-    #[serde(rename = "clientAuthenticationMethod", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientAuthenticationMethod",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_authentication_method: Vec<String>,
     #[doc = "Additional parameters required by the token endpoint of this authorization server represented as an array of JSON objects with name and value string properties, i.e. {\"name\" : \"name value\", \"value\": \"a value\"}."]
-    #[serde(rename = "tokenBodyParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tokenBodyParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub token_body_parameters: Vec<TokenBodyParameterContract>,
     #[doc = "OAuth token endpoint. Contains absolute URI to entity being referenced."]
     #[serde(rename = "tokenEndpoint", default, skip_serializing_if = "Option::is_none")]
@@ -2193,7 +2354,12 @@ pub struct AuthorizationServerContractBaseProperties {
     #[serde(rename = "defaultScope", default, skip_serializing_if = "Option::is_none")]
     pub default_scope: Option<String>,
     #[doc = "Specifies the mechanism by which access token is passed to the API. "]
-    #[serde(rename = "bearerTokenSendingMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bearerTokenSendingMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bearer_token_sending_methods: Vec<String>,
     #[doc = "Can be optionally specified when resource owner password grant type is supported by this authorization server. Default resource owner username."]
     #[serde(rename = "resourceOwnerUsername", default, skip_serializing_if = "Option::is_none")]
@@ -2297,7 +2463,12 @@ pub struct AuthorizationServerUpdateContractProperties {
     #[serde(rename = "authorizationEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub authorization_endpoint: Option<String>,
     #[doc = "Form of an authorization grant, which the client uses to request the access token."]
-    #[serde(rename = "grantTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "grantTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub grant_types: Vec<String>,
     #[doc = "Client or app id registered with this authorization server."]
     #[serde(rename = "clientId", default, skip_serializing_if = "Option::is_none")]
@@ -2358,7 +2529,11 @@ impl BackendBaseParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendCollection {
     #[doc = "Backend values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackendContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2457,10 +2632,19 @@ pub mod backend_contract_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendCredentialsContract {
     #[doc = "List of Client Certificate Ids."]
-    #[serde(rename = "certificateIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_ids: Vec<String>,
     #[doc = "List of Client Certificate Thumbprints. Will be ignored if certificatesIds are provided."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate: Vec<String>,
     #[doc = "Query Parameter description."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2552,10 +2736,20 @@ pub struct BackendServiceFabricClusterProperties {
     #[serde(rename = "managementEndpoints")]
     pub management_endpoints: Vec<String>,
     #[doc = "Thumbprints of certificates cluster management service uses for tls communication"]
-    #[serde(rename = "serverCertificateThumbprints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverCertificateThumbprints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_certificate_thumbprints: Vec<String>,
     #[doc = "Server X509 Certificate Names Collection"]
-    #[serde(rename = "serverX509Names", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverX509Names",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_x509_names: Vec<X509CertificateName>,
 }
 impl BackendServiceFabricClusterProperties {
@@ -2713,7 +2907,11 @@ impl BodyDiagnosticSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CacheCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CacheContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2810,7 +3008,11 @@ impl CacheUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3120,10 +3322,19 @@ pub mod connectivity_check_request {
             #[serde(default, skip_serializing_if = "Option::is_none")]
             pub method: Option<http_configuration::Method>,
             #[doc = "List of HTTP status codes considered valid for the request response."]
-            #[serde(rename = "validStatusCodes", default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                rename = "validStatusCodes",
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub valid_status_codes: Vec<i64>,
             #[doc = "List of headers to be included in the request."]
-            #[serde(default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub headers: Vec<HttpHeader>,
         }
         impl HttpConfiguration {
@@ -3179,7 +3390,11 @@ pub mod connectivity_check_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectivityCheckResponse {
     #[doc = "List of hops between the source and the destination."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hops: Vec<ConnectivityHop>,
     #[doc = "The connection status."]
     #[serde(rename = "connectionStatus", default, skip_serializing_if = "Option::is_none")]
@@ -3265,10 +3480,19 @@ pub struct ConnectivityHop {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "List of next hop identifiers."]
-    #[serde(rename = "nextHopIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nextHopIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub next_hop_ids: Vec<String>,
     #[doc = "List of issues."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issues: Vec<ConnectivityIssue>,
 }
 impl ConnectivityHop {
@@ -3289,7 +3513,11 @@ pub struct ConnectivityIssue {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<connectivity_issue::Type>,
     #[doc = "Provides additional context on the issue."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub context: Vec<IssueContext>,
 }
 impl ConnectivityIssue {
@@ -3519,7 +3747,11 @@ pub mod connectivity_status_contract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContentItemCollection {
     #[doc = "Collection of content items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContentItemContract>,
     #[doc = "Next page link, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3560,7 +3792,11 @@ impl ContentItemContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContentTypeCollection {
     #[doc = "Collection of content types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContentTypeContract>,
     #[doc = "Next page link, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3616,10 +3852,19 @@ impl ContentTypeContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataMasking {
     #[doc = "Masking settings for Url query parameters"]
-    #[serde(rename = "queryParams", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "queryParams",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub query_params: Vec<DataMaskingEntity>,
     #[doc = "Masking settings for headers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<DataMaskingEntity>,
 }
 impl DataMasking {
@@ -3718,7 +3963,11 @@ impl DeletedServiceContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedServicesCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedServiceContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3765,7 +4014,11 @@ impl DeployConfigurationParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiagnosticContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4011,7 +4264,11 @@ pub mod diagnostic_contract_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EmailTemplateCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EmailTemplateContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4062,7 +4319,11 @@ pub struct EmailTemplateContractProperties {
     #[serde(rename = "isDefault", default, skip_serializing_if = "Option::is_none")]
     pub is_default: Option<bool>,
     #[doc = "Email Template Parameter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<EmailTemplateParametersContractProperties>,
 }
 impl EmailTemplateContractProperties {
@@ -4111,7 +4372,11 @@ pub struct EmailTemplateUpdateParameterProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub body: Option<String>,
     #[doc = "Email Template Parameter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<EmailTemplateParametersContractProperties>,
 }
 impl EmailTemplateUpdateParameterProperties {
@@ -4138,7 +4403,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The Ports used when connecting to DomainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -4207,7 +4477,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The list of invalid fields send in request, in case of validation error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorFieldContract>,
 }
 impl ErrorResponseBody {
@@ -4219,7 +4493,11 @@ impl ErrorResponseBody {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCertificateAuthorityCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayCertificateAuthorityContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4266,7 +4544,11 @@ impl GatewayCertificateAuthorityContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4319,7 +4601,11 @@ impl GatewayContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayHostnameConfigurationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayHostnameConfigurationContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4474,7 +4760,11 @@ impl GenerateSsoUrlResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GroupCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4845,7 +5135,11 @@ pub mod hostname_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HttpMessageDiagnostic {
     #[doc = "Array of HTTP Headers to log."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<String>,
     #[doc = "Body logging settings."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4868,7 +5162,12 @@ pub struct IdentityProviderBaseParameters {
     #[serde(rename = "signinTenant", default, skip_serializing_if = "Option::is_none")]
     pub signin_tenant: Option<String>,
     #[doc = "List of Allowed Tenants when configuring Azure Active Directory login."]
-    #[serde(rename = "allowedTenants", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedTenants",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_tenants: Vec<String>,
     #[doc = "OpenID Connect discovery endpoint hostname for AAD or AAD B2C."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5019,7 +5318,11 @@ impl IdentityProviderCreateContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IdentityProviderList {
     #[doc = "Identity Provider configuration values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IdentityProviderContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5072,7 +5375,11 @@ impl IdentityProviderUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IssueAttachmentCollection {
     #[doc = "Issue Attachment values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IssueAttachmentContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5130,7 +5437,11 @@ impl IssueAttachmentContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IssueCollection {
     #[doc = "Issue values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IssueContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5154,7 +5465,11 @@ impl IssueCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IssueCommentCollection {
     #[doc = "Issue Comment values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IssueCommentContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5406,7 +5721,11 @@ impl KeyVaultLastAccessStatusContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoggerCollection {
     #[doc = "Logger values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoggerContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5597,7 +5916,11 @@ pub mod logger_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NamedValueCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NamedValueContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5699,7 +6022,11 @@ impl NamedValueCreateContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NamedValueEntityBaseParameters {
     #[doc = "Optional tags that when provided can be used to filter the NamedValue list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Determines whether the value is a secret and should be encrypted or not. Default value is false."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5791,7 +6118,11 @@ impl NetworkStatusContractByLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotificationContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5868,7 +6199,12 @@ pub struct OpenIdAuthenticationSettingsContract {
     #[serde(rename = "openidProviderId", default, skip_serializing_if = "Option::is_none")]
     pub openid_provider_id: Option<String>,
     #[doc = "How to send token to the server."]
-    #[serde(rename = "bearerTokenSendingMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bearerTokenSendingMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bearer_token_sending_methods: Vec<BearerTokenSendingMethodsContract>,
 }
 impl OpenIdAuthenticationSettingsContract {
@@ -5880,7 +6216,11 @@ impl OpenIdAuthenticationSettingsContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OpenIdConnectProviderCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OpenidConnectProviderContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6029,7 +6369,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6091,7 +6435,12 @@ impl OperationContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationEntityBaseContract {
     #[doc = "Collection of URL template parameters."]
-    #[serde(rename = "templateParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "templateParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub template_parameters: Vec<ParameterContract>,
     #[doc = "Description of the operation. May include HTML formatting tags."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6100,7 +6449,11 @@ pub struct OperationEntityBaseContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub request: Option<RequestContract>,
     #[doc = "Array of Operation responses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub responses: Vec<ResponseContract>,
     #[doc = "Operation Policies"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6115,7 +6468,11 @@ impl OperationEntityBaseContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6168,7 +6525,12 @@ pub struct OperationResultContractProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub error: Option<ErrorResponseBody>,
     #[doc = "This property if only provided as part of the TenantConfiguration_Validate operation. It contains the log the entities which will be updated/created/deleted as part of the TenantConfiguration_Deploy operation."]
-    #[serde(rename = "actionLog", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionLog",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub action_log: Vec<OperationResultLogItemContract>,
 }
 impl OperationResultContractProperties {
@@ -6277,7 +6639,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that the Api Management Service reaches the service at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -6317,7 +6683,11 @@ pub struct ParameterContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub required: Option<bool>,
     #[doc = "Parameter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Schema identifier."]
     #[serde(rename = "schemaId", default, skip_serializing_if = "Option::is_none")]
@@ -6392,7 +6762,11 @@ impl PipelineDiagnosticSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyCollection {
     #[doc = "Policy Contract value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6491,7 +6865,11 @@ pub mod policy_contract_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyDescriptionCollection {
     #[doc = "Descriptions of APIM policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyDescriptionContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6570,7 +6948,11 @@ impl PortalDelegationSettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PortalRevisionCollection {
     #[doc = "Collection of portal revisions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PortalRevisionContract>,
     #[doc = "Next page link, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6690,7 +7072,11 @@ impl PortalSettingValidationKeyContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PortalSettingsCollection {
     #[doc = "Descriptions of APIM policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PortalSettingsContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6827,7 +7213,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -6947,7 +7337,12 @@ pub struct PrivateEndpointConnectionWrapperProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "All the Group ids."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
 }
 impl PrivateEndpointConnectionWrapperProperties {
@@ -7017,7 +7412,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -7032,10 +7431,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -7065,7 +7474,11 @@ impl PrivateLinkServiceConnectionState {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProductCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProductContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7204,7 +7617,11 @@ impl ProductUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaCounterCollection {
     #[doc = "Quota counter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaCounterContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7296,7 +7713,11 @@ impl QuotaCounterValueUpdateContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecipientEmailCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecipientEmailContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7340,7 +7761,11 @@ impl RecipientEmailContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecipientUserCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecipientUserContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7384,10 +7809,18 @@ impl RecipientUsersContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecipientsContractProperties {
     #[doc = "List of Emails subscribed for the notification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
     #[doc = "List of Users subscribed for the notification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub users: Vec<String>,
 }
 impl RecipientsContractProperties {
@@ -7417,7 +7850,11 @@ impl RegionContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegionListResult {
     #[doc = "Lists of Regions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7474,7 +7911,11 @@ impl RemotePrivateEndpointConnectionWrapper {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReportCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReportRecordContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7594,7 +8035,12 @@ pub struct RepresentationContract {
     #[serde(rename = "typeName", default, skip_serializing_if = "Option::is_none")]
     pub type_name: Option<String>,
     #[doc = "Collection of form parameters. Required if 'contentType' value is either 'application/x-www-form-urlencoded' or 'multipart/form-data'.."]
-    #[serde(rename = "formParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "formParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub form_parameters: Vec<ParameterContract>,
     #[doc = "Parameter examples."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7618,13 +8064,26 @@ pub struct RequestContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Collection of operation request query parameters."]
-    #[serde(rename = "queryParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "queryParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub query_parameters: Vec<ParameterContract>,
     #[doc = "Collection of operation request headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ParameterContract>,
     #[doc = "Collection of operation request representations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub representations: Vec<RepresentationContract>,
 }
 impl RequestContract {
@@ -7636,7 +8095,11 @@ impl RequestContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RequestReportCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RequestReportRecordContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7933,10 +8396,18 @@ pub struct ResponseContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Collection of operation response representations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub representations: Vec<RepresentationContract>,
     #[doc = "Collection of operation response headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ParameterContract>,
 }
 impl ResponseContract {
@@ -8033,7 +8504,11 @@ impl SaveConfigurationParameterProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SchemaCollection {
     #[doc = "Schema Contract value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SchemaContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8147,7 +8622,11 @@ impl SchemaDocumentProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8441,7 +8920,11 @@ impl SubscriptionsDelegationSettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8521,7 +9004,11 @@ impl TagDescriptionBaseProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagDescriptionCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagDescriptionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8588,7 +9075,11 @@ impl TagDescriptionCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagResourceCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagResourceContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8699,7 +9190,11 @@ impl TenantConfigurationSyncStateContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TenantSettingsCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TenantSettingsContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8777,7 +9272,11 @@ impl TokenBodyParameterContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8829,7 +9328,11 @@ pub struct UserContractProperties {
     #[serde(rename = "registrationDate", default, with = "azure_core::date::rfc3339::option")]
     pub registration_date: Option<time::OffsetDateTime>,
     #[doc = "Collection of groups user is part of."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<GroupContractProperties>,
 }
 impl UserContractProperties {
@@ -8976,7 +9479,11 @@ pub struct UserEntityBaseParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub note: Option<String>,
     #[doc = "Collection of user identities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identities: Vec<UserIdentityContract>,
 }
 impl UserEntityBaseParameters {
@@ -9041,7 +9548,11 @@ pub mod user_entity_base_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserIdentityCollection {
     #[doc = "User Identity values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserIdentityContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/apimanagement/src/package_preview_2021_12/models.rs b/services/mgmt/apimanagement/src/package_preview_2021_12/models.rs
index 5bfc5dd621..316a9574e1 100644
--- a/services/mgmt/apimanagement/src/package_preview_2021_12/models.rs
+++ b/services/mgmt/apimanagement/src/package_preview_2021_12/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessInformationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessInformationContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -148,13 +152,27 @@ pub struct AdditionalLocation {
     #[doc = "API Management service resource SKU properties."]
     pub sku: ApiManagementServiceSkuProperties,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Public Static Load Balanced IP addresses of the API Management service in the additional location. Available only for Basic, Standard, Premium and Isolated SKU."]
-    #[serde(rename = "publicIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<String>,
     #[doc = "Private Static Load Balanced IP addresses of the API Management service which is deployed in an Internal Virtual Network in a particular additional location. Available only for Basic, Standard, Premium and Isolated SKU."]
-    #[serde(rename = "privateIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ip_addresses: Vec<String>,
     #[doc = "Public Standard SKU IP V4 based IP address to be associated with Virtual Network deployed service in the location. Supported only for Premium SKU being deployed in Virtual Network."]
     #[serde(rename = "publicIpAddressId", default, skip_serializing_if = "Option::is_none")]
@@ -240,7 +258,11 @@ pub mod additional_location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -309,7 +331,11 @@ pub struct ApiContractProperties {
     #[doc = "Relative URL uniquely identifying this API and all of its resource paths within the API Management service instance. It is appended to the API endpoint base URL specified during the service instance creation to form a public URL for this API."]
     pub path: String,
     #[doc = "Describes on which protocols the operations in this API can be invoked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<String>,
     #[doc = "An API Version Set contains the common configuration for a set of API Versions relating "]
     #[serde(rename = "apiVersionSet", default, skip_serializing_if = "Option::is_none")]
@@ -343,7 +369,11 @@ pub struct ApiContractUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Describes on which protocols the operations in this API can be invoked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<String>,
 }
 impl ApiContractUpdateProperties {
@@ -845,13 +875,28 @@ pub struct ApiManagementServiceBaseProperties {
     #[serde(rename = "developerPortalUrl", default, skip_serializing_if = "Option::is_none")]
     pub developer_portal_url: Option<String>,
     #[doc = "Custom hostname configuration of the API Management service."]
-    #[serde(rename = "hostnameConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostnameConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hostname_configurations: Vec<HostnameConfiguration>,
     #[doc = "Public Static Load Balanced IP addresses of the API Management service in Primary region. Available only for Basic, Standard, Premium and Isolated SKU."]
-    #[serde(rename = "publicIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<String>,
     #[doc = "Private Static Load Balanced IP addresses of the API Management service in Primary region which is deployed in an Internal Virtual Network. Available only for Basic, Standard, Premium and Isolated SKU."]
-    #[serde(rename = "privateIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ip_addresses: Vec<String>,
     #[doc = "Public Standard SKU IP V4 based IP address to be associated with Virtual Network deployed service in the region. Supported only for Developer and Premium SKU being deployed in Virtual Network."]
     #[serde(rename = "publicIpAddressId", default, skip_serializing_if = "Option::is_none")]
@@ -863,13 +908,22 @@ pub struct ApiManagementServiceBaseProperties {
     #[serde(rename = "virtualNetworkConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub virtual_network_configuration: Option<VirtualNetworkConfiguration>,
     #[doc = "Additional datacenter locations of the API Management service."]
-    #[serde(rename = "additionalLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_locations: Vec<AdditionalLocation>,
     #[doc = "Custom properties of the API Management service.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Ciphers.TripleDes168` will disable the cipher TLS_RSA_WITH_3DES_EDE_CBC_SHA for all TLS(1.0, 1.1 and 1.2).</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Protocols.Tls11` can be used to disable just TLS 1.1.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Protocols.Tls10` can be used to disable TLS 1.0 on an API Management service.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Backend.Protocols.Tls11` can be used to disable just TLS 1.1 for communications with backends.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Backend.Protocols.Tls10` can be used to disable TLS 1.0 for communications with backends.</br>Setting `Microsoft.WindowsAzure.ApiManagement.Gateway.Protocols.Server.Http2` can be used to enable HTTP2 protocol on an API Management service.</br>Not specifying any of these properties on PATCH operation will reset omitted properties' values to their defaults. For all the settings except Http2 the default value is `True` if the service was created on or before April 1st 2018 and `False` otherwise. Http2 setting's default value is `False`.</br></br>You can disable any of next ciphers by using settings `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Ciphers.[cipher_name]`: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA. For example, `Microsoft.WindowsAzure.ApiManagement.Gateway.Security.Ciphers.TLS_RSA_WITH_AES_128_CBC_SHA256`:`false`. The default value is `true` for them.  Note: next ciphers can't be disabled since they are required by Azure CloudService internal components: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,TLS_RSA_WITH_AES_256_GCM_SHA384"]
     #[serde(rename = "customProperties", default, skip_serializing_if = "Option::is_none")]
     pub custom_properties: Option<serde_json::Value>,
     #[doc = "List of Certificates that need to be installed in the API Management service. Max supported certificates that can be installed is 10."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<CertificateConfiguration>,
     #[doc = "Property only meant to be used for Consumption SKU Service. This enforces a client certificate to be presented on each request to the gateway. This also enables the ability to authenticate the certificate in the policy on the gateway."]
     #[serde(rename = "enableClientCertificate", default, skip_serializing_if = "Option::is_none")]
@@ -887,7 +941,12 @@ pub struct ApiManagementServiceBaseProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub restore: Option<bool>,
     #[doc = "List of Private Endpoint Connections of this service."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<RemotePrivateEndpointConnectionWrapper>,
     #[doc = "Compute Platform Version running the service in this location."]
     #[serde(rename = "platformVersion", default, skip_serializing_if = "Option::is_none")]
@@ -1223,7 +1282,11 @@ pub struct ApiManagementServiceResource {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ApiManagementServiceResource {
@@ -1319,7 +1382,11 @@ pub struct ApiManagementServiceUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ApiManagementServiceUpdateParameters {
@@ -1369,22 +1436,48 @@ pub struct ApiManagementSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<ApiManagementSkuCapacity>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "A list of locations and availability zones in those locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ApiManagementSkuLocationInfo>,
     #[doc = "The api versions that support this SKU."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Metadata for retrieving price info."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<ApiManagementSkuCosts>,
     #[doc = "A name value pair to describe the capability."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ApiManagementSkuCapabilities>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ApiManagementSkuRestrictions>,
 }
 impl ApiManagementSku {
@@ -1462,10 +1555,19 @@ pub struct ApiManagementSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "List of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ApiManagementSkuZoneDetails>,
 }
 impl ApiManagementSkuLocationInfo {
@@ -1476,10 +1578,18 @@ impl ApiManagementSkuLocationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiManagementSkuRestrictionInfo {
     #[doc = "Locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "List of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ApiManagementSkuRestrictionInfo {
@@ -1494,7 +1604,11 @@ pub struct ApiManagementSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<api_management_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
     pub restriction_info: Option<ApiManagementSkuRestrictionInfo>,
@@ -1526,10 +1640,18 @@ pub mod api_management_sku_restrictions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiManagementSkuZoneDetails {
     #[doc = "The set of zones that the SKU is available in with the specified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
     #[doc = "A list of capabilities that are available for the SKU in the specified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ApiManagementSkuCapabilities>,
 }
 impl ApiManagementSkuZoneDetails {
@@ -1561,7 +1683,11 @@ impl ApiManagementSkusResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiReleaseCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiReleaseContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1620,7 +1746,11 @@ impl ApiReleaseContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiRevisionCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiRevisionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1712,7 +1842,11 @@ pub struct ApiTagResourceContractProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Describes on which protocols the operations in this API can be invoked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<String>,
 }
 impl ApiTagResourceContractProperties {
@@ -1748,7 +1882,11 @@ impl ApiVersionConstraint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiVersionSetCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiVersionSetContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2060,7 +2198,11 @@ impl AuthenticationSettingsContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationServerCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AuthorizationServerContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2101,13 +2243,28 @@ pub struct AuthorizationServerContractBaseProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "HTTP verbs supported by the authorization endpoint. GET must be always present. POST is optional."]
-    #[serde(rename = "authorizationMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_methods: Vec<String>,
     #[doc = "Method of authentication supported by the token endpoint of this authorization server. Possible values are Basic and/or Body. When Body is specified, client credentials and other parameters are passed within the request body in the application/x-www-form-urlencoded format."]
-    #[serde(rename = "clientAuthenticationMethod", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientAuthenticationMethod",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_authentication_method: Vec<String>,
     #[doc = "Additional parameters required by the token endpoint of this authorization server represented as an array of JSON objects with name and value string properties, i.e. {\"name\" : \"name value\", \"value\": \"a value\"}."]
-    #[serde(rename = "tokenBodyParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tokenBodyParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub token_body_parameters: Vec<TokenBodyParameterContract>,
     #[doc = "OAuth token endpoint. Contains absolute URI to entity being referenced."]
     #[serde(rename = "tokenEndpoint", default, skip_serializing_if = "Option::is_none")]
@@ -2119,7 +2276,12 @@ pub struct AuthorizationServerContractBaseProperties {
     #[serde(rename = "defaultScope", default, skip_serializing_if = "Option::is_none")]
     pub default_scope: Option<String>,
     #[doc = "Specifies the mechanism by which access token is passed to the API. "]
-    #[serde(rename = "bearerTokenSendingMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bearerTokenSendingMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bearer_token_sending_methods: Vec<String>,
     #[doc = "Can be optionally specified when resource owner password grant type is supported by this authorization server. Default resource owner username."]
     #[serde(rename = "resourceOwnerUsername", default, skip_serializing_if = "Option::is_none")]
@@ -2223,7 +2385,12 @@ pub struct AuthorizationServerUpdateContractProperties {
     #[serde(rename = "authorizationEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub authorization_endpoint: Option<String>,
     #[doc = "Form of an authorization grant, which the client uses to request the access token."]
-    #[serde(rename = "grantTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "grantTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub grant_types: Vec<String>,
     #[doc = "Client or app id registered with this authorization server."]
     #[serde(rename = "clientId", default, skip_serializing_if = "Option::is_none")]
@@ -2284,7 +2451,11 @@ impl BackendBaseParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendCollection {
     #[doc = "Backend values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackendContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2383,10 +2554,19 @@ pub mod backend_contract_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendCredentialsContract {
     #[doc = "List of Client Certificate Ids."]
-    #[serde(rename = "certificateIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_ids: Vec<String>,
     #[doc = "List of Client Certificate Thumbprints. Will be ignored if certificatesIds are provided."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate: Vec<String>,
     #[doc = "Query Parameter description."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2478,10 +2658,20 @@ pub struct BackendServiceFabricClusterProperties {
     #[serde(rename = "managementEndpoints")]
     pub management_endpoints: Vec<String>,
     #[doc = "Thumbprints of certificates cluster management service uses for tls communication"]
-    #[serde(rename = "serverCertificateThumbprints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverCertificateThumbprints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_certificate_thumbprints: Vec<String>,
     #[doc = "Server X509 Certificate Names Collection"]
-    #[serde(rename = "serverX509Names", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverX509Names",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_x509_names: Vec<X509CertificateName>,
 }
 impl BackendServiceFabricClusterProperties {
@@ -2639,7 +2829,11 @@ impl BodyDiagnosticSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CacheCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CacheContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2736,7 +2930,11 @@ impl CacheUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3046,10 +3244,19 @@ pub mod connectivity_check_request {
             #[serde(default, skip_serializing_if = "Option::is_none")]
             pub method: Option<http_configuration::Method>,
             #[doc = "List of HTTP status codes considered valid for the request response."]
-            #[serde(rename = "validStatusCodes", default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                rename = "validStatusCodes",
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub valid_status_codes: Vec<i64>,
             #[doc = "List of headers to be included in the request."]
-            #[serde(default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub headers: Vec<HttpHeader>,
         }
         impl HttpConfiguration {
@@ -3105,7 +3312,11 @@ pub mod connectivity_check_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectivityCheckResponse {
     #[doc = "List of hops between the source and the destination."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hops: Vec<ConnectivityHop>,
     #[doc = "The connection status."]
     #[serde(rename = "connectionStatus", default, skip_serializing_if = "Option::is_none")]
@@ -3191,10 +3402,19 @@ pub struct ConnectivityHop {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "List of next hop identifiers."]
-    #[serde(rename = "nextHopIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nextHopIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub next_hop_ids: Vec<String>,
     #[doc = "List of issues."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issues: Vec<ConnectivityIssue>,
 }
 impl ConnectivityHop {
@@ -3215,7 +3435,11 @@ pub struct ConnectivityIssue {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<connectivity_issue::Type>,
     #[doc = "Provides additional context on the issue."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub context: Vec<IssueContext>,
 }
 impl ConnectivityIssue {
@@ -3445,7 +3669,11 @@ pub mod connectivity_status_contract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContentItemCollection {
     #[doc = "Collection of content items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContentItemContract>,
     #[doc = "Next page link, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3486,7 +3714,11 @@ impl ContentItemContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContentTypeCollection {
     #[doc = "Collection of content types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContentTypeContract>,
     #[doc = "Next page link, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3542,10 +3774,19 @@ impl ContentTypeContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataMasking {
     #[doc = "Masking settings for Url query parameters"]
-    #[serde(rename = "queryParams", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "queryParams",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub query_params: Vec<DataMaskingEntity>,
     #[doc = "Masking settings for headers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<DataMaskingEntity>,
 }
 impl DataMasking {
@@ -3644,7 +3885,11 @@ impl DeletedServiceContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedServicesCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedServiceContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3691,7 +3936,11 @@ impl DeployConfigurationParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiagnosticContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3937,7 +4186,11 @@ pub mod diagnostic_contract_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EmailTemplateCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EmailTemplateContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3988,7 +4241,11 @@ pub struct EmailTemplateContractProperties {
     #[serde(rename = "isDefault", default, skip_serializing_if = "Option::is_none")]
     pub is_default: Option<bool>,
     #[doc = "Email Template Parameter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<EmailTemplateParametersContractProperties>,
 }
 impl EmailTemplateContractProperties {
@@ -4037,7 +4294,11 @@ pub struct EmailTemplateUpdateParameterProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub body: Option<String>,
     #[doc = "Email Template Parameter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<EmailTemplateParametersContractProperties>,
 }
 impl EmailTemplateUpdateParameterProperties {
@@ -4064,7 +4325,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The Ports used when connecting to DomainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -4133,7 +4399,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The list of invalid fields send in request, in case of validation error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorFieldContract>,
 }
 impl ErrorResponseBody {
@@ -4145,7 +4415,11 @@ impl ErrorResponseBody {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCertificateAuthorityCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayCertificateAuthorityContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4192,7 +4466,11 @@ impl GatewayCertificateAuthorityContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4245,7 +4523,11 @@ impl GatewayContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayHostnameConfigurationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayHostnameConfigurationContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4400,7 +4682,11 @@ impl GenerateSsoUrlResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GlobalSchemaCollection {
     #[doc = "Global Schema Contract value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GlobalSchemaContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4514,7 +4800,11 @@ impl GlobalSchemaDocumentProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GroupCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4885,7 +5175,11 @@ pub mod hostname_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HttpMessageDiagnostic {
     #[doc = "Array of HTTP Headers to log."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<String>,
     #[doc = "Body logging settings."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4908,7 +5202,12 @@ pub struct IdentityProviderBaseParameters {
     #[serde(rename = "signinTenant", default, skip_serializing_if = "Option::is_none")]
     pub signin_tenant: Option<String>,
     #[doc = "List of Allowed Tenants when configuring Azure Active Directory login."]
-    #[serde(rename = "allowedTenants", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedTenants",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_tenants: Vec<String>,
     #[doc = "OpenID Connect discovery endpoint hostname for AAD or AAD B2C."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5062,7 +5361,11 @@ impl IdentityProviderCreateContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IdentityProviderList {
     #[doc = "Identity Provider configuration values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IdentityProviderContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5115,7 +5418,11 @@ impl IdentityProviderUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IssueAttachmentCollection {
     #[doc = "Issue Attachment values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IssueAttachmentContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5173,7 +5480,11 @@ impl IssueAttachmentContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IssueCollection {
     #[doc = "Issue values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IssueContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5197,7 +5508,11 @@ impl IssueCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IssueCommentCollection {
     #[doc = "Issue Comment values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IssueCommentContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5449,7 +5764,11 @@ impl KeyVaultLastAccessStatusContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoggerCollection {
     #[doc = "Logger values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoggerContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5640,7 +5959,11 @@ pub mod logger_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NamedValueCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NamedValueContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5742,7 +6065,11 @@ impl NamedValueCreateContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NamedValueEntityBaseParameters {
     #[doc = "Optional tags that when provided can be used to filter the NamedValue list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Determines whether the value is a secret and should be encrypted or not. Default value is false."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5834,7 +6161,11 @@ impl NetworkStatusContractByLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotificationContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5911,7 +6242,12 @@ pub struct OpenIdAuthenticationSettingsContract {
     #[serde(rename = "openidProviderId", default, skip_serializing_if = "Option::is_none")]
     pub openid_provider_id: Option<String>,
     #[doc = "How to send token to the server."]
-    #[serde(rename = "bearerTokenSendingMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bearerTokenSendingMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bearer_token_sending_methods: Vec<BearerTokenSendingMethodsContract>,
 }
 impl OpenIdAuthenticationSettingsContract {
@@ -5923,7 +6259,11 @@ impl OpenIdAuthenticationSettingsContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OpenIdConnectProviderCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OpenidConnectProviderContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6072,7 +6412,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6134,7 +6478,12 @@ impl OperationContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationEntityBaseContract {
     #[doc = "Collection of URL template parameters."]
-    #[serde(rename = "templateParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "templateParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub template_parameters: Vec<ParameterContract>,
     #[doc = "Description of the operation. May include HTML formatting tags."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6143,7 +6492,11 @@ pub struct OperationEntityBaseContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub request: Option<RequestContract>,
     #[doc = "Array of Operation responses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub responses: Vec<ResponseContract>,
     #[doc = "Operation Policies"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6158,7 +6511,11 @@ impl OperationEntityBaseContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6211,7 +6568,12 @@ pub struct OperationResultContractProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub error: Option<ErrorResponseBody>,
     #[doc = "This property if only provided as part of the TenantConfiguration_Validate operation. It contains the log the entities which will be updated/created/deleted as part of the TenantConfiguration_Deploy operation."]
-    #[serde(rename = "actionLog", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionLog",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub action_log: Vec<OperationResultLogItemContract>,
 }
 impl OperationResultContractProperties {
@@ -6320,7 +6682,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that the Api Management Service reaches the service at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -6360,7 +6726,11 @@ pub struct ParameterContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub required: Option<bool>,
     #[doc = "Parameter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Schema identifier."]
     #[serde(rename = "schemaId", default, skip_serializing_if = "Option::is_none")]
@@ -6435,7 +6805,11 @@ impl PipelineDiagnosticSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyCollection {
     #[doc = "Policy Contract value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6534,7 +6908,11 @@ pub mod policy_contract_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyDescriptionCollection {
     #[doc = "Descriptions of APIM policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyDescriptionContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6578,7 +6956,11 @@ impl PolicyDescriptionContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyFragmentCollection {
     #[doc = "Policy fragment contract value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyFragmentContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6678,7 +7060,11 @@ pub mod policy_fragment_contract_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PortalConfigCollection {
     #[doc = "The developer portal configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PortalConfigContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6707,7 +7093,12 @@ impl PortalConfigContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PortalConfigCorsProperties {
     #[doc = "Allowed origins, e.g. `https://trusted.com`."]
-    #[serde(rename = "allowedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_origins: Vec<String>,
 }
 impl PortalConfigCorsProperties {
@@ -6722,10 +7113,20 @@ pub struct PortalConfigCspProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub mode: Option<portal_config_csp_properties::Mode>,
     #[doc = "The URLs used by the browser to report CSP violations."]
-    #[serde(rename = "reportUri", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reportUri",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub report_uri: Vec<String>,
     #[doc = "Allowed sources, e.g. `*.trusted.com`, `trusted.com`, `https://`."]
-    #[serde(rename = "allowedSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_sources: Vec<String>,
 }
 impl PortalConfigCspProperties {
@@ -6906,7 +7307,11 @@ impl PortalDelegationSettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PortalRevisionCollection {
     #[doc = "Collection of portal revisions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PortalRevisionContract>,
     #[doc = "Next page link, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7026,7 +7431,11 @@ impl PortalSettingValidationKeyContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PortalSettingsCollection {
     #[doc = "Descriptions of APIM policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PortalSettingsContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7163,7 +7572,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -7283,7 +7696,12 @@ pub struct PrivateEndpointConnectionWrapperProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "All the Group ids."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
 }
 impl PrivateEndpointConnectionWrapperProperties {
@@ -7353,7 +7771,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -7368,10 +7790,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -7401,7 +7833,11 @@ impl PrivateLinkServiceConnectionState {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProductCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProductContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7540,7 +7976,11 @@ impl ProductUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaCounterCollection {
     #[doc = "Quota counter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaCounterContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7632,7 +8072,11 @@ impl QuotaCounterValueUpdateContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecipientEmailCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecipientEmailContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7676,7 +8120,11 @@ impl RecipientEmailContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecipientUserCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecipientUserContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7720,10 +8168,18 @@ impl RecipientUsersContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecipientsContractProperties {
     #[doc = "List of Emails subscribed for the notification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
     #[doc = "List of Users subscribed for the notification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub users: Vec<String>,
 }
 impl RecipientsContractProperties {
@@ -7753,7 +8209,11 @@ impl RegionContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegionListResult {
     #[doc = "Lists of Regions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7810,7 +8270,11 @@ impl RemotePrivateEndpointConnectionWrapper {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReportCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReportRecordContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7930,7 +8394,12 @@ pub struct RepresentationContract {
     #[serde(rename = "typeName", default, skip_serializing_if = "Option::is_none")]
     pub type_name: Option<String>,
     #[doc = "Collection of form parameters. Required if 'contentType' value is either 'application/x-www-form-urlencoded' or 'multipart/form-data'.."]
-    #[serde(rename = "formParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "formParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub form_parameters: Vec<ParameterContract>,
     #[doc = "Parameter examples."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7954,13 +8423,26 @@ pub struct RequestContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Collection of operation request query parameters."]
-    #[serde(rename = "queryParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "queryParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub query_parameters: Vec<ParameterContract>,
     #[doc = "Collection of operation request headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ParameterContract>,
     #[doc = "Collection of operation request representations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub representations: Vec<RepresentationContract>,
 }
 impl RequestContract {
@@ -7972,7 +8454,11 @@ impl RequestContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RequestReportCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RequestReportRecordContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8074,7 +8560,11 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceCollection {
     #[doc = "A collection of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<serde_json::Value>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8287,10 +8777,18 @@ pub struct ResponseContract {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Collection of operation response representations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub representations: Vec<RepresentationContract>,
     #[doc = "Collection of operation response headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ParameterContract>,
 }
 impl ResponseContract {
@@ -8387,7 +8885,11 @@ impl SaveConfigurationParameterProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SchemaCollection {
     #[doc = "API Schema Contract value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SchemaContract>,
     #[doc = "Total record count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8461,7 +8963,11 @@ impl SchemaDocumentProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8755,7 +9261,11 @@ impl SubscriptionsDelegationSettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8835,7 +9345,11 @@ impl TagDescriptionBaseProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagDescriptionCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagDescriptionContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8902,7 +9416,11 @@ impl TagDescriptionCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagResourceCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagResourceContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -9013,7 +9531,11 @@ impl TenantConfigurationSyncStateContractProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TenantSettingsCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TenantSettingsContract>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9091,7 +9613,11 @@ impl TokenBodyParameterContract {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserCollection {
     #[doc = "Page values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -9143,7 +9669,11 @@ pub struct UserContractProperties {
     #[serde(rename = "registrationDate", default, with = "azure_core::date::rfc3339::option")]
     pub registration_date: Option<time::OffsetDateTime>,
     #[doc = "Collection of groups user is part of."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<GroupContractProperties>,
 }
 impl UserContractProperties {
@@ -9290,7 +9820,11 @@ pub struct UserEntityBaseParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub note: Option<String>,
     #[doc = "Collection of user identities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identities: Vec<UserIdentityContract>,
 }
 impl UserEntityBaseParameters {
@@ -9355,7 +9889,11 @@ pub mod user_entity_base_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserIdentityCollection {
     #[doc = "User Identity values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserIdentityContract>,
     #[doc = "Total record count number across all pages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/app/src/package_2022_01_01_preview/models.rs b/services/mgmt/app/src/package_2022_01_01_preview/models.rs
index ca533d9397..217bea3875 100644
--- a/services/mgmt/app/src/package_2022_01_01_preview/models.rs
+++ b/services/mgmt/app/src/package_2022_01_01_preview/models.rs
@@ -7,7 +7,12 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedAudiencesValidation {
     #[doc = "The configuration settings of the allowed list of audiences from which to validate the JWT token."]
-    #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAudiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_audiences: Vec<String>,
 }
 impl AllowedAudiencesValidation {
@@ -19,10 +24,18 @@ impl AllowedAudiencesValidation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedPrincipals {
     #[doc = "The list of the allowed groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<String>,
     #[doc = "The list of the allowed identities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identities: Vec<String>,
 }
 impl AllowedPrincipals {
@@ -173,7 +186,11 @@ impl AuthPlatform {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -218,7 +235,12 @@ impl AzureActiveDirectory {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureActiveDirectoryLogin {
     #[doc = "Login parameters to send to the OpenID Connect authorization endpoint when\na user logs in. Each parameter must be in the form \"key=value\"."]
-    #[serde(rename = "loginParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_parameters: Vec<String>,
     #[doc = "<code>true</code> if the www-authenticate provider should be omitted from the request; otherwise, <code>false</code>."]
     #[serde(rename = "disableWWWAuthenticate", default, skip_serializing_if = "Option::is_none")]
@@ -267,7 +289,12 @@ pub struct AzureActiveDirectoryValidation {
     #[serde(rename = "jwtClaimChecks", default, skip_serializing_if = "Option::is_none")]
     pub jwt_claim_checks: Option<JwtClaimChecks>,
     #[doc = "The list of audiences that can make successful authentication/authorization requests."]
-    #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAudiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_audiences: Vec<String>,
     #[doc = "The configuration settings of the Azure Active Directory default authorization policy."]
     #[serde(rename = "defaultAuthorizationPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -543,7 +570,11 @@ impl ClientRegistration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Configuration {
     #[doc = "Collection of secrets used by a Container app"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<Secret>,
     #[doc = "ActiveRevisionsMode controls how active revisions are handled for the Container app:\n<list><item>Multiple: multiple revisions can be active. If no value if provided, this is the default</item><item>Single: Only one revision can be active at a time. Revision weights can not be used in this mode</item></list>"]
     #[serde(rename = "activeRevisionsMode", default, skip_serializing_if = "Option::is_none")]
@@ -552,7 +583,11 @@ pub struct Configuration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub ingress: Option<Ingress>,
     #[doc = "Collection of private container registry credentials for containers used by the Container app"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub registries: Vec<RegistryCredentials>,
     #[doc = "Container App Dapr configuration."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -613,22 +648,43 @@ pub struct Container {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Container start command."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "Container start command arguments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub args: Vec<String>,
     #[doc = "Container environment variables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub env: Vec<EnvironmentVar>,
     #[doc = "Container App container resource requirements."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub resources: Option<ContainerResources>,
     #[doc = "List of probes for the container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub probes: Vec<ContainerAppProbe>,
     #[doc = "Container volume mounts."]
-    #[serde(rename = "volumeMounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeMounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_mounts: Vec<VolumeMount>,
 }
 impl Container {
@@ -684,7 +740,12 @@ pub mod container_app {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub template: Option<Template>,
         #[doc = "Outbound IP Addresses for container app."]
-        #[serde(rename = "outboundIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "outboundIPAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub outbound_ip_addresses: Vec<String>,
     }
     impl Properties {
@@ -816,7 +877,12 @@ pub mod container_app_probe {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub host: Option<String>,
         #[doc = "Custom headers to set in the request. HTTP allows repeated headers."]
-        #[serde(rename = "httpHeaders", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "httpHeaders",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub http_headers: Vec<serde_json::Value>,
         #[doc = "Path to access on the HTTP server."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1074,19 +1140,44 @@ pub struct CustomHostnameAnalysisResult {
     #[serde(rename = "conflictingContainerAppResourceId", default, skip_serializing_if = "Option::is_none")]
     pub conflicting_container_app_resource_id: Option<String>,
     #[doc = "CName records visible for this hostname."]
-    #[serde(rename = "cNameRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cNameRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub c_name_records: Vec<String>,
     #[doc = "TXT records visible for this hostname."]
-    #[serde(rename = "txtRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "txtRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub txt_records: Vec<String>,
     #[doc = "A records visible for this hostname."]
-    #[serde(rename = "aRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub a_records: Vec<String>,
     #[doc = "Alternate CName records visible for this hostname."]
-    #[serde(rename = "alternateCNameRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateCNameRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_c_name_records: Vec<String>,
     #[doc = "Alternate TXT records visible for this hostname."]
-    #[serde(rename = "alternateTxtRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateTxtRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_txt_records: Vec<String>,
 }
 impl CustomHostnameAnalysisResult {
@@ -1116,7 +1207,11 @@ pub mod custom_hostname_analysis_result {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "Details or the error"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<serde_json::Value>,
     }
     impl CustomDomainVerificationFailureInfo {
@@ -1153,7 +1248,11 @@ pub struct CustomScaleRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
     #[doc = "Authentication secrets for the custom scale rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auth: Vec<ScaleRuleAuth>,
 }
 impl CustomScaleRule {
@@ -1256,13 +1355,25 @@ pub mod dapr_component {
         #[serde(rename = "initTimeout", default, skip_serializing_if = "Option::is_none")]
         pub init_timeout: Option<String>,
         #[doc = "Collection of secrets used by a Dapr component"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub secrets: Vec<Secret>,
         #[doc = "Component metadata"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub metadata: Vec<DaprMetadata>,
         #[doc = "Names of container apps that can use this Dapr component"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub scopes: Vec<String>,
     }
     impl Properties {
@@ -1316,7 +1427,12 @@ pub struct DefaultAuthorizationPolicy {
     #[serde(rename = "allowedPrincipals", default, skip_serializing_if = "Option::is_none")]
     pub allowed_principals: Option<AllowedPrincipals>,
     #[doc = "The configuration settings of the Azure Active Directory allowed applications."]
-    #[serde(rename = "allowedApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_applications: Vec<String>,
 }
 impl DefaultAuthorizationPolicy {
@@ -1357,7 +1473,11 @@ pub mod default_error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "Details or the error"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<serde_json::Value>,
         #[doc = "More information to debug error."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1494,7 +1614,12 @@ pub struct GlobalValidation {
     #[serde(rename = "redirectToProvider", default, skip_serializing_if = "Option::is_none")]
     pub redirect_to_provider: Option<String>,
     #[doc = "The paths for which unauthenticated flow would not be redirected to the login page."]
-    #[serde(rename = "excludedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_paths: Vec<String>,
 }
 impl GlobalValidation {
@@ -1541,7 +1666,11 @@ pub struct HttpScaleRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
     #[doc = "Authentication secrets for the custom scale rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auth: Vec<ScaleRuleAuth>,
 }
 impl HttpScaleRule {
@@ -1628,10 +1757,19 @@ pub struct Ingress {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub transport: Option<ingress::Transport>,
     #[doc = "Traffic weights for app's revisions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traffic: Vec<TrafficWeight>,
     #[doc = "custom domain bindings for Container Apps' hostnames."]
-    #[serde(rename = "customDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_domains: Vec<CustomDomain>,
     #[doc = "Bool indicating if HTTP connections to is allowed. If set to false HTTP connections are automatically redirected to HTTPS connections"]
     #[serde(rename = "allowInsecure", default, skip_serializing_if = "Option::is_none")]
@@ -1691,10 +1829,20 @@ pub mod ingress {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JwtClaimChecks {
     #[doc = "The list of the allowed groups."]
-    #[serde(rename = "allowedGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_groups: Vec<String>,
     #[doc = "The list of the allowed client applications."]
-    #[serde(rename = "allowedClientApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedClientApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_client_applications: Vec<String>,
 }
 impl JwtClaimChecks {
@@ -1727,7 +1875,12 @@ pub struct Login {
     #[serde(rename = "preserveUrlFragmentsForLogins", default, skip_serializing_if = "Option::is_none")]
     pub preserve_url_fragments_for_logins: Option<bool>,
     #[doc = "External URLs that can be redirected to as part of logging in or logging out of the app. Note that the query string part of the URL is ignored.\nThis is an advanced setting typically only needed by Windows Store application backends.\nNote that URLs within the current domain are always implicitly allowed."]
-    #[serde(rename = "allowedExternalRedirectUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedExternalRedirectUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_external_redirect_urls: Vec<String>,
     #[doc = "The configuration settings of the session cookie's expiration."]
     #[serde(rename = "cookieExpiration", default, skip_serializing_if = "Option::is_none")]
@@ -1757,7 +1910,11 @@ impl LoginRoutes {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoginScopes {
     #[doc = "A list of the scopes that should be requested while authenticating."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl LoginScopes {
@@ -2088,7 +2245,11 @@ pub struct OpenIdConnectLogin {
     #[serde(rename = "nameClaimType", default, skip_serializing_if = "Option::is_none")]
     pub name_claim_type: Option<String>,
     #[doc = "A list of the scopes that should be requested while authenticating."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl OpenIdConnectLogin {
@@ -2177,7 +2338,11 @@ pub struct QueueScaleRule {
     #[serde(rename = "queueLength", default, skip_serializing_if = "Option::is_none")]
     pub queue_length: Option<i32>,
     #[doc = "Authentication secrets for the queue scale rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auth: Vec<ScaleRuleAuth>,
 }
 impl QueueScaleRule {
@@ -2244,7 +2409,11 @@ pub mod replica {
         #[serde(rename = "createdTime", default, with = "azure_core::date::rfc3339::option")]
         pub created_time: Option<time::OffsetDateTime>,
         #[doc = "The containers collection under a replica."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub containers: Vec<ReplicaContainer>,
     }
     impl Properties {
@@ -2477,7 +2646,11 @@ pub struct Scale {
     #[serde(rename = "maxReplicas", default, skip_serializing_if = "Option::is_none")]
     pub max_replicas: Option<i32>,
     #[doc = "Scaling rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ScaleRule>,
 }
 impl Scale {
@@ -2656,13 +2829,21 @@ pub struct Template {
     #[serde(rename = "revisionSuffix", default, skip_serializing_if = "Option::is_none")]
     pub revision_suffix: Option<String>,
     #[doc = "List of container definitions for the Container App."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub containers: Vec<Container>,
     #[doc = "Container App scaling configurations."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scale: Option<Scale>,
     #[doc = "List of volume definitions for the Container App."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volumes: Vec<Volume>,
 }
 impl Template {
diff --git a/services/mgmt/app/src/package_2022_03/models.rs b/services/mgmt/app/src/package_2022_03/models.rs
index 7c64f38564..9ee6fab46e 100644
--- a/services/mgmt/app/src/package_2022_03/models.rs
+++ b/services/mgmt/app/src/package_2022_03/models.rs
@@ -7,7 +7,12 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedAudiencesValidation {
     #[doc = "The configuration settings of the allowed list of audiences from which to validate the JWT token."]
-    #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAudiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_audiences: Vec<String>,
 }
 impl AllowedAudiencesValidation {
@@ -19,10 +24,18 @@ impl AllowedAudiencesValidation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedPrincipals {
     #[doc = "The list of the allowed groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<String>,
     #[doc = "The list of the allowed identities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identities: Vec<String>,
 }
 impl AllowedPrincipals {
@@ -173,7 +186,11 @@ impl AuthPlatform {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -218,7 +235,12 @@ impl AzureActiveDirectory {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureActiveDirectoryLogin {
     #[doc = "Login parameters to send to the OpenID Connect authorization endpoint when\na user logs in. Each parameter must be in the form \"key=value\"."]
-    #[serde(rename = "loginParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_parameters: Vec<String>,
     #[doc = "<code>true</code> if the www-authenticate provider should be omitted from the request; otherwise, <code>false</code>."]
     #[serde(rename = "disableWWWAuthenticate", default, skip_serializing_if = "Option::is_none")]
@@ -267,7 +289,12 @@ pub struct AzureActiveDirectoryValidation {
     #[serde(rename = "jwtClaimChecks", default, skip_serializing_if = "Option::is_none")]
     pub jwt_claim_checks: Option<JwtClaimChecks>,
     #[doc = "The list of audiences that can make successful authentication/authorization requests."]
-    #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAudiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_audiences: Vec<String>,
     #[doc = "The configuration settings of the Azure Active Directory default authorization policy."]
     #[serde(rename = "defaultAuthorizationPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -616,7 +643,11 @@ impl ClientRegistration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Configuration {
     #[doc = "Collection of secrets used by a Container app"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<Secret>,
     #[doc = "ActiveRevisionsMode controls how active revisions are handled for the Container app:\n<list><item>Multiple: multiple revisions can be active.</item><item>Single: Only one revision can be active at a time. Revision weights can not be used in this mode. If no value if provided, this is the default.</item></list>"]
     #[serde(rename = "activeRevisionsMode", default, skip_serializing_if = "Option::is_none")]
@@ -625,7 +656,11 @@ pub struct Configuration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub ingress: Option<Ingress>,
     #[doc = "Collection of private container registry credentials for containers used by the Container app"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub registries: Vec<RegistryCredentials>,
     #[doc = "Container App Dapr configuration."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -686,22 +721,43 @@ pub struct Container {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Container start command."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "Container start command arguments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub args: Vec<String>,
     #[doc = "Container environment variables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub env: Vec<EnvironmentVar>,
     #[doc = "Container App container resource requirements."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub resources: Option<ContainerResources>,
     #[doc = "List of probes for the container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub probes: Vec<ContainerAppProbe>,
     #[doc = "Container volume mounts."]
-    #[serde(rename = "volumeMounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeMounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_mounts: Vec<VolumeMount>,
 }
 impl Container {
@@ -757,7 +813,12 @@ pub mod container_app {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub template: Option<Template>,
         #[doc = "Outbound IP Addresses for container app."]
-        #[serde(rename = "outboundIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "outboundIPAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub outbound_ip_addresses: Vec<String>,
     }
     impl Properties {
@@ -877,7 +938,12 @@ pub mod container_app_probe {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub host: Option<String>,
         #[doc = "Custom headers to set in the request. HTTP allows repeated headers."]
-        #[serde(rename = "httpHeaders", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "httpHeaders",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub http_headers: Vec<serde_json::Value>,
         #[doc = "Path to access on the HTTP server."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1135,19 +1201,44 @@ pub struct CustomHostnameAnalysisResult {
     #[serde(rename = "conflictingContainerAppResourceId", default, skip_serializing_if = "Option::is_none")]
     pub conflicting_container_app_resource_id: Option<String>,
     #[doc = "CName records visible for this hostname."]
-    #[serde(rename = "cNameRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cNameRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub c_name_records: Vec<String>,
     #[doc = "TXT records visible for this hostname."]
-    #[serde(rename = "txtRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "txtRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub txt_records: Vec<String>,
     #[doc = "A records visible for this hostname."]
-    #[serde(rename = "aRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub a_records: Vec<String>,
     #[doc = "Alternate CName records visible for this hostname."]
-    #[serde(rename = "alternateCNameRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateCNameRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_c_name_records: Vec<String>,
     #[doc = "Alternate TXT records visible for this hostname."]
-    #[serde(rename = "alternateTxtRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateTxtRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_txt_records: Vec<String>,
 }
 impl CustomHostnameAnalysisResult {
@@ -1177,7 +1268,11 @@ pub mod custom_hostname_analysis_result {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "Details or the error"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<serde_json::Value>,
     }
     impl CustomDomainVerificationFailureInfo {
@@ -1214,7 +1309,11 @@ pub struct CustomScaleRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
     #[doc = "Authentication secrets for the custom scale rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auth: Vec<ScaleRuleAuth>,
 }
 impl CustomScaleRule {
@@ -1317,13 +1416,25 @@ pub mod dapr_component {
         #[serde(rename = "initTimeout", default, skip_serializing_if = "Option::is_none")]
         pub init_timeout: Option<String>,
         #[doc = "Collection of secrets used by a Dapr component"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub secrets: Vec<Secret>,
         #[doc = "Component metadata"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub metadata: Vec<DaprMetadata>,
         #[doc = "Names of container apps that can use this Dapr component"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub scopes: Vec<String>,
     }
     impl Properties {
@@ -1388,7 +1499,12 @@ pub struct DefaultAuthorizationPolicy {
     #[serde(rename = "allowedPrincipals", default, skip_serializing_if = "Option::is_none")]
     pub allowed_principals: Option<AllowedPrincipals>,
     #[doc = "The configuration settings of the Azure Active Directory allowed applications."]
-    #[serde(rename = "allowedApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_applications: Vec<String>,
 }
 impl DefaultAuthorizationPolicy {
@@ -1429,7 +1545,11 @@ pub mod default_error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "Details or the error"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<serde_json::Value>,
         #[doc = "More information to debug error."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1569,7 +1689,12 @@ pub struct GlobalValidation {
     #[serde(rename = "redirectToProvider", default, skip_serializing_if = "Option::is_none")]
     pub redirect_to_provider: Option<String>,
     #[doc = "The paths for which unauthenticated flow would not be redirected to the login page."]
-    #[serde(rename = "excludedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_paths: Vec<String>,
 }
 impl GlobalValidation {
@@ -1616,7 +1741,11 @@ pub struct HttpScaleRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
     #[doc = "Authentication secrets for the custom scale rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auth: Vec<ScaleRuleAuth>,
 }
 impl HttpScaleRule {
@@ -1703,10 +1832,19 @@ pub struct Ingress {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub transport: Option<ingress::Transport>,
     #[doc = "Traffic weights for app's revisions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traffic: Vec<TrafficWeight>,
     #[doc = "custom domain bindings for Container Apps' hostnames."]
-    #[serde(rename = "customDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_domains: Vec<CustomDomain>,
     #[doc = "Bool indicating if HTTP connections to is allowed. If set to false HTTP connections are automatically redirected to HTTPS connections"]
     #[serde(rename = "allowInsecure", default, skip_serializing_if = "Option::is_none")]
@@ -1766,10 +1904,20 @@ pub mod ingress {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JwtClaimChecks {
     #[doc = "The list of the allowed groups."]
-    #[serde(rename = "allowedGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_groups: Vec<String>,
     #[doc = "The list of the allowed client applications."]
-    #[serde(rename = "allowedClientApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedClientApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_client_applications: Vec<String>,
 }
 impl JwtClaimChecks {
@@ -1802,7 +1950,12 @@ pub struct Login {
     #[serde(rename = "preserveUrlFragmentsForLogins", default, skip_serializing_if = "Option::is_none")]
     pub preserve_url_fragments_for_logins: Option<bool>,
     #[doc = "External URLs that can be redirected to as part of logging in or logging out of the app. Note that the query string part of the URL is ignored.\nThis is an advanced setting typically only needed by Windows Store application backends.\nNote that URLs within the current domain are always implicitly allowed."]
-    #[serde(rename = "allowedExternalRedirectUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedExternalRedirectUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_external_redirect_urls: Vec<String>,
     #[doc = "The configuration settings of the session cookie's expiration."]
     #[serde(rename = "cookieExpiration", default, skip_serializing_if = "Option::is_none")]
@@ -1832,7 +1985,11 @@ impl LoginRoutes {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoginScopes {
     #[doc = "A list of the scopes that should be requested while authenticating."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl LoginScopes {
@@ -2157,7 +2314,11 @@ pub struct OpenIdConnectLogin {
     #[serde(rename = "nameClaimType", default, skip_serializing_if = "Option::is_none")]
     pub name_claim_type: Option<String>,
     #[doc = "A list of the scopes that should be requested while authenticating."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl OpenIdConnectLogin {
@@ -2246,7 +2407,11 @@ pub struct QueueScaleRule {
     #[serde(rename = "queueLength", default, skip_serializing_if = "Option::is_none")]
     pub queue_length: Option<i32>,
     #[doc = "Authentication secrets for the queue scale rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auth: Vec<ScaleRuleAuth>,
 }
 impl QueueScaleRule {
@@ -2316,7 +2481,11 @@ pub mod replica {
         #[serde(rename = "createdTime", default, with = "azure_core::date::rfc3339::option")]
         pub created_time: Option<time::OffsetDateTime>,
         #[doc = "The containers collection under a replica."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub containers: Vec<ReplicaContainer>,
     }
     impl Properties {
@@ -2549,7 +2718,11 @@ pub struct Scale {
     #[serde(rename = "maxReplicas", default, skip_serializing_if = "Option::is_none")]
     pub max_replicas: Option<i32>,
     #[doc = "Scaling rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ScaleRule>,
 }
 impl Scale {
@@ -2728,13 +2901,21 @@ pub struct Template {
     #[serde(rename = "revisionSuffix", default, skip_serializing_if = "Option::is_none")]
     pub revision_suffix: Option<String>,
     #[doc = "List of container definitions for the Container App."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub containers: Vec<Container>,
     #[doc = "Container App scaling configurations."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scale: Option<Scale>,
     #[doc = "List of volume definitions for the Container App."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volumes: Vec<Volume>,
 }
 impl Template {
diff --git a/services/mgmt/appconfiguration/src/package_2020_07_01_preview/models.rs b/services/mgmt/appconfiguration/src/package_2020_07_01_preview/models.rs
index 1d5eefded4..592d40fe1a 100644
--- a/services/mgmt/appconfiguration/src/package_2020_07_01_preview/models.rs
+++ b/services/mgmt/appconfiguration/src/package_2020_07_01_preview/models.rs
@@ -34,7 +34,11 @@ impl ApiKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiKeyListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiKey>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -134,7 +138,11 @@ impl ConfigurationStore {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationStoreListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationStore>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -167,7 +175,12 @@ pub struct ConfigurationStoreProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionProperties>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionReference>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -333,7 +346,12 @@ pub struct ErrorDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetails {
@@ -384,7 +402,11 @@ impl KeyValue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyValueListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KeyValue>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -507,7 +529,11 @@ pub struct MetricSpecification {
     #[serde(rename = "internalMetricName", default, skip_serializing_if = "Option::is_none")]
     pub internal_metric_name: Option<String>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
 }
 impl MetricSpecification {
@@ -582,7 +608,11 @@ impl OperationDefinitionDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationDefinitionListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDefinition>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -648,7 +678,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -781,7 +815,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -805,10 +843,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The list of required DNS zone names of the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1026,10 +1074,20 @@ pub mod resource_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
diff --git a/services/mgmt/appconfiguration/src/package_2021_03_01_preview/models.rs b/services/mgmt/appconfiguration/src/package_2021_03_01_preview/models.rs
index b23f0c7cb2..6cfd08aff6 100644
--- a/services/mgmt/appconfiguration/src/package_2021_03_01_preview/models.rs
+++ b/services/mgmt/appconfiguration/src/package_2021_03_01_preview/models.rs
@@ -34,7 +34,11 @@ impl ApiKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiKeyListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiKey>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -138,7 +142,11 @@ impl ConfigurationStore {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationStoreListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationStore>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -171,7 +179,12 @@ pub struct ConfigurationStoreProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionProperties>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionReference>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -386,7 +399,12 @@ pub struct ErrorDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetails {
@@ -437,7 +455,11 @@ impl KeyValue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyValueListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KeyValue>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -560,7 +582,11 @@ pub struct MetricSpecification {
     #[serde(rename = "internalMetricName", default, skip_serializing_if = "Option::is_none")]
     pub internal_metric_name: Option<String>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Optional. If set to true, then zero will be returned for time duration where no metric is emitted/published."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -638,7 +664,11 @@ impl OperationDefinitionDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationDefinitionListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDefinition>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -704,7 +734,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -837,7 +871,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -861,10 +899,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The list of required DNS zone names of the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1071,10 +1119,20 @@ pub mod resource_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
diff --git a/services/mgmt/appconfiguration/src/package_2021_10_01_preview/models.rs b/services/mgmt/appconfiguration/src/package_2021_10_01_preview/models.rs
index 92e0bf4157..157a56892a 100644
--- a/services/mgmt/appconfiguration/src/package_2021_10_01_preview/models.rs
+++ b/services/mgmt/appconfiguration/src/package_2021_10_01_preview/models.rs
@@ -34,7 +34,11 @@ impl ApiKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiKeyListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiKey>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -138,7 +142,11 @@ impl ConfigurationStore {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationStoreListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationStore>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -171,7 +179,12 @@ pub struct ConfigurationStoreProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionProperties>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionReference>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -392,7 +405,11 @@ impl DeletedConfigurationStore {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedConfigurationStoreListResult {
     #[doc = "The list of deleted configuration store."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedConfigurationStore>,
     #[doc = "The URL to get the next set of deleted configuration stores."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -473,7 +490,12 @@ pub struct ErrorDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetails {
@@ -524,7 +546,11 @@ impl KeyValue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyValueListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KeyValue>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -647,7 +673,11 @@ pub struct MetricSpecification {
     #[serde(rename = "internalMetricName", default, skip_serializing_if = "Option::is_none")]
     pub internal_metric_name: Option<String>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Optional. If set to true, then zero will be returned for time duration where no metric is emitted/published."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -725,7 +755,11 @@ impl OperationDefinitionDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationDefinitionListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDefinition>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -791,7 +825,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -924,7 +962,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -948,10 +990,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The list of required DNS zone names of the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1158,10 +1210,20 @@ pub mod resource_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
diff --git a/services/mgmt/appconfiguration/src/package_2022_03_01_preview/models.rs b/services/mgmt/appconfiguration/src/package_2022_03_01_preview/models.rs
index ee7578b485..f76390f32d 100644
--- a/services/mgmt/appconfiguration/src/package_2022_03_01_preview/models.rs
+++ b/services/mgmt/appconfiguration/src/package_2022_03_01_preview/models.rs
@@ -34,7 +34,11 @@ impl ApiKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiKeyListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiKey>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -138,7 +142,11 @@ impl ConfigurationStore {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationStoreListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationStore>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -171,7 +179,12 @@ pub struct ConfigurationStoreProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionProperties>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionReference>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -389,7 +402,11 @@ impl DeletedConfigurationStore {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedConfigurationStoreListResult {
     #[doc = "The list of deleted configuration store."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedConfigurationStore>,
     #[doc = "The URL to get the next set of deleted configuration stores."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -470,7 +487,12 @@ pub struct ErrorDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetails {
@@ -521,7 +543,11 @@ impl KeyValue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyValueListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KeyValue>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -644,7 +670,11 @@ pub struct MetricSpecification {
     #[serde(rename = "internalMetricName", default, skip_serializing_if = "Option::is_none")]
     pub internal_metric_name: Option<String>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Optional. If set to true, then zero will be returned for time duration where no metric is emitted/published."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -722,7 +752,11 @@ impl OperationDefinitionDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationDefinitionListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDefinition>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -788,7 +822,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -921,7 +959,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -945,10 +987,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The list of required DNS zone names of the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1098,7 +1150,11 @@ impl Replica {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicaListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Replica>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1264,10 +1320,20 @@ pub mod resource_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
diff --git a/services/mgmt/appconfiguration/src/package_2022_05_01/models.rs b/services/mgmt/appconfiguration/src/package_2022_05_01/models.rs
index 92e0bf4157..157a56892a 100644
--- a/services/mgmt/appconfiguration/src/package_2022_05_01/models.rs
+++ b/services/mgmt/appconfiguration/src/package_2022_05_01/models.rs
@@ -34,7 +34,11 @@ impl ApiKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiKeyListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiKey>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -138,7 +142,11 @@ impl ConfigurationStore {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationStoreListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationStore>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -171,7 +179,12 @@ pub struct ConfigurationStoreProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionProperties>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionReference>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -392,7 +405,11 @@ impl DeletedConfigurationStore {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedConfigurationStoreListResult {
     #[doc = "The list of deleted configuration store."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedConfigurationStore>,
     #[doc = "The URL to get the next set of deleted configuration stores."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -473,7 +490,12 @@ pub struct ErrorDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetails {
@@ -524,7 +546,11 @@ impl KeyValue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyValueListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KeyValue>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -647,7 +673,11 @@ pub struct MetricSpecification {
     #[serde(rename = "internalMetricName", default, skip_serializing_if = "Option::is_none")]
     pub internal_metric_name: Option<String>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Optional. If set to true, then zero will be returned for time duration where no metric is emitted/published."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -725,7 +755,11 @@ impl OperationDefinitionDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationDefinitionListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDefinition>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -791,7 +825,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -924,7 +962,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -948,10 +990,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The list of required DNS zone names of the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1158,10 +1210,20 @@ pub mod resource_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
diff --git a/services/mgmt/applicationinsights/src/package_2022_01_11/models.rs b/services/mgmt/applicationinsights/src/package_2022_01_11/models.rs
index 37b2ec7761..92b4cfae9f 100644
--- a/services/mgmt/applicationinsights/src/package_2022_01_11/models.rs
+++ b/services/mgmt/applicationinsights/src/package_2022_01_11/models.rs
@@ -10,10 +10,20 @@ pub struct ApiKeyRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The read access rights of this API Key."]
-    #[serde(rename = "linkedReadProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedReadProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_read_properties: Vec<String>,
     #[doc = "The write access rights of this API Key."]
-    #[serde(rename = "linkedWriteProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedWriteProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_write_properties: Vec<String>,
 }
 impl ApiKeyRequest {
@@ -76,7 +86,11 @@ impl AnnotationError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AnnotationsListResult {
     #[doc = "An array of annotations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Annotation>,
 }
 impl azure_core::Continuable for AnnotationsListResult {
@@ -130,10 +144,20 @@ pub struct ApplicationInsightsComponentApiKey {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The read access rights of this API Key."]
-    #[serde(rename = "linkedReadProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedReadProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_read_properties: Vec<String>,
     #[doc = "The write access rights of this API Key."]
-    #[serde(rename = "linkedWriteProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedWriteProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_write_properties: Vec<String>,
 }
 impl ApplicationInsightsComponentApiKey {
@@ -297,7 +321,12 @@ impl ApplicationInsightsComponentAnalyticsItemProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationInsightsComponentAvailableFeatures {
     #[doc = "A list of Application Insights component feature."]
-    #[serde(rename = "Result", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Result",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub result: Vec<ApplicationInsightsComponentFeature>,
 }
 impl ApplicationInsightsComponentAvailableFeatures {
@@ -312,7 +341,12 @@ pub struct ApplicationInsightsComponentBillingFeatures {
     #[serde(rename = "DataVolumeCap", default, skip_serializing_if = "Option::is_none")]
     pub data_volume_cap: Option<ApplicationInsightsComponentDataVolumeCap>,
     #[doc = "Current enabled pricing plan. When the component is in the Enterprise plan, this will list both 'Basic' and 'Application Insights Enterprise'."]
-    #[serde(rename = "CurrentBillingFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "CurrentBillingFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub current_billing_features: Vec<String>,
 }
 impl ApplicationInsightsComponentBillingFeatures {
@@ -475,7 +509,12 @@ pub struct ApplicationInsightsComponentFavorite {
     #[serde(rename = "TimeModified", default, skip_serializing_if = "Option::is_none")]
     pub time_modified: Option<String>,
     #[doc = "A list of 0 or more tags that are associated with this favorite definition"]
-    #[serde(rename = "Tags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Tags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Favorite category, as defined by the user at creation time."]
     #[serde(rename = "Category", default, skip_serializing_if = "Option::is_none")]
@@ -522,7 +561,12 @@ pub struct ApplicationInsightsComponentFeature {
     #[serde(rename = "IsHidden", default, skip_serializing_if = "Option::is_none")]
     pub is_hidden: Option<bool>,
     #[doc = "A list of Application Insights component feature capability."]
-    #[serde(rename = "Capabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Capabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ApplicationInsightsComponentFeatureCapability>,
     #[doc = "Display name of the feature."]
     #[serde(rename = "Title", default, skip_serializing_if = "Option::is_none")]
@@ -656,7 +700,12 @@ pub struct ApplicationInsightsComponentProactiveDetectionConfiguration {
     #[serde(rename = "SendEmailsToSubscriptionOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_emails_to_subscription_owners: Option<bool>,
     #[doc = "Custom email addresses for this rule notifications"]
-    #[serde(rename = "CustomEmails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "CustomEmails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_emails: Vec<String>,
     #[doc = "The last time this rule was updated"]
     #[serde(rename = "LastUpdatedTime", default, skip_serializing_if = "Option::is_none")]
@@ -769,7 +818,12 @@ pub struct ApplicationInsightsComponentProperties {
     #[serde(rename = "LaMigrationDate", default, with = "azure_core::date::rfc3339::option")]
     pub la_migration_date: Option<time::OffsetDateTime>,
     #[doc = "List of linked private link scope resources."]
-    #[serde(rename = "PrivateLinkScopedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PrivateLinkScopedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_scoped_resources: Vec<PrivateLinkScopedResource>,
     #[doc = "The network access type for operating on the Application Insights Component. By default it is Enabled"]
     #[serde(rename = "publicNetworkAccessForIngestion", default, skip_serializing_if = "Option::is_none")]
@@ -1318,7 +1372,11 @@ impl InnerError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InnerErrorTrace {
     #[doc = "detailed error trace"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trace: Vec<String>,
 }
 impl InnerErrorTrace {
@@ -1542,7 +1600,11 @@ pub struct MyWorkbookProperties {
     #[doc = "Workbook category, as defined by the user at creation time."]
     pub category: String,
     #[doc = "A list of 0 or more tags that are associated with this private workbook definition"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Unique user id of the specific user that owns this private workbook."]
     #[serde(rename = "userId", default, skip_serializing_if = "Option::is_none")]
@@ -1618,7 +1680,11 @@ impl MyWorkbookUserAssignedIdentities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MyWorkbooksListResult {
     #[doc = "An array of private workbooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MyWorkbook>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1695,7 +1761,11 @@ impl OperationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of CDN operations supported by the CDN resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1740,7 +1810,11 @@ impl OperationLive {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "A collection of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationLive>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2104,7 +2178,11 @@ impl WorkItemConfigurationError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkItemConfigurationsListResult {
     #[doc = "An array of work item configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkItemConfiguration>,
 }
 impl azure_core::Continuable for WorkItemConfigurationsListResult {
@@ -2200,7 +2278,11 @@ impl WorkbookErrorDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkbookInnerErrorTrace {
     #[doc = "detailed error trace"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trace: Vec<String>,
 }
 impl WorkbookInnerErrorTrace {
@@ -2226,7 +2308,11 @@ pub struct WorkbookProperties {
     #[doc = "Workbook category, as defined by the user at creation time."]
     pub category: String,
     #[doc = "Being deprecated, please use the other tags field"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Unique user id of the specific user that owns this workbook."]
     #[serde(rename = "userId", default, skip_serializing_if = "Option::is_none")]
@@ -2274,7 +2360,11 @@ pub struct WorkbookPropertiesUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "A list of 0 or more tags that are associated with this workbook definition"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "The description of the workbook."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2400,7 +2490,11 @@ pub struct WorkbookTemplateErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The list of invalid fields send in request, in case of validation error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<WorkbookTemplateErrorFieldContract>,
 }
 impl WorkbookTemplateErrorBody {
@@ -2457,7 +2551,11 @@ pub struct WorkbookTemplateLocalizedGallery {
     #[serde(rename = "templateData", default, skip_serializing_if = "Option::is_none")]
     pub template_data: Option<serde_json::Value>,
     #[doc = "Workbook galleries supported by the template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub galleries: Vec<WorkbookTemplateGallery>,
 }
 impl WorkbookTemplateLocalizedGallery {
@@ -2542,7 +2640,11 @@ impl WorkbookTemplateUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkbookTemplatesListResult {
     #[doc = "An array of workbook templates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkbookTemplate>,
 }
 impl azure_core::Continuable for WorkbookTemplatesListResult {
@@ -2620,7 +2722,11 @@ pub mod workbook_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkbooksListResult {
     #[doc = "An array of workbooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workbook>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
diff --git a/services/mgmt/applicationinsights/src/package_2022_02_01/models.rs b/services/mgmt/applicationinsights/src/package_2022_02_01/models.rs
index 37b2ec7761..92b4cfae9f 100644
--- a/services/mgmt/applicationinsights/src/package_2022_02_01/models.rs
+++ b/services/mgmt/applicationinsights/src/package_2022_02_01/models.rs
@@ -10,10 +10,20 @@ pub struct ApiKeyRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The read access rights of this API Key."]
-    #[serde(rename = "linkedReadProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedReadProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_read_properties: Vec<String>,
     #[doc = "The write access rights of this API Key."]
-    #[serde(rename = "linkedWriteProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedWriteProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_write_properties: Vec<String>,
 }
 impl ApiKeyRequest {
@@ -76,7 +86,11 @@ impl AnnotationError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AnnotationsListResult {
     #[doc = "An array of annotations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Annotation>,
 }
 impl azure_core::Continuable for AnnotationsListResult {
@@ -130,10 +144,20 @@ pub struct ApplicationInsightsComponentApiKey {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The read access rights of this API Key."]
-    #[serde(rename = "linkedReadProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedReadProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_read_properties: Vec<String>,
     #[doc = "The write access rights of this API Key."]
-    #[serde(rename = "linkedWriteProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedWriteProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_write_properties: Vec<String>,
 }
 impl ApplicationInsightsComponentApiKey {
@@ -297,7 +321,12 @@ impl ApplicationInsightsComponentAnalyticsItemProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationInsightsComponentAvailableFeatures {
     #[doc = "A list of Application Insights component feature."]
-    #[serde(rename = "Result", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Result",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub result: Vec<ApplicationInsightsComponentFeature>,
 }
 impl ApplicationInsightsComponentAvailableFeatures {
@@ -312,7 +341,12 @@ pub struct ApplicationInsightsComponentBillingFeatures {
     #[serde(rename = "DataVolumeCap", default, skip_serializing_if = "Option::is_none")]
     pub data_volume_cap: Option<ApplicationInsightsComponentDataVolumeCap>,
     #[doc = "Current enabled pricing plan. When the component is in the Enterprise plan, this will list both 'Basic' and 'Application Insights Enterprise'."]
-    #[serde(rename = "CurrentBillingFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "CurrentBillingFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub current_billing_features: Vec<String>,
 }
 impl ApplicationInsightsComponentBillingFeatures {
@@ -475,7 +509,12 @@ pub struct ApplicationInsightsComponentFavorite {
     #[serde(rename = "TimeModified", default, skip_serializing_if = "Option::is_none")]
     pub time_modified: Option<String>,
     #[doc = "A list of 0 or more tags that are associated with this favorite definition"]
-    #[serde(rename = "Tags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Tags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Favorite category, as defined by the user at creation time."]
     #[serde(rename = "Category", default, skip_serializing_if = "Option::is_none")]
@@ -522,7 +561,12 @@ pub struct ApplicationInsightsComponentFeature {
     #[serde(rename = "IsHidden", default, skip_serializing_if = "Option::is_none")]
     pub is_hidden: Option<bool>,
     #[doc = "A list of Application Insights component feature capability."]
-    #[serde(rename = "Capabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Capabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ApplicationInsightsComponentFeatureCapability>,
     #[doc = "Display name of the feature."]
     #[serde(rename = "Title", default, skip_serializing_if = "Option::is_none")]
@@ -656,7 +700,12 @@ pub struct ApplicationInsightsComponentProactiveDetectionConfiguration {
     #[serde(rename = "SendEmailsToSubscriptionOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_emails_to_subscription_owners: Option<bool>,
     #[doc = "Custom email addresses for this rule notifications"]
-    #[serde(rename = "CustomEmails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "CustomEmails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_emails: Vec<String>,
     #[doc = "The last time this rule was updated"]
     #[serde(rename = "LastUpdatedTime", default, skip_serializing_if = "Option::is_none")]
@@ -769,7 +818,12 @@ pub struct ApplicationInsightsComponentProperties {
     #[serde(rename = "LaMigrationDate", default, with = "azure_core::date::rfc3339::option")]
     pub la_migration_date: Option<time::OffsetDateTime>,
     #[doc = "List of linked private link scope resources."]
-    #[serde(rename = "PrivateLinkScopedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PrivateLinkScopedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_scoped_resources: Vec<PrivateLinkScopedResource>,
     #[doc = "The network access type for operating on the Application Insights Component. By default it is Enabled"]
     #[serde(rename = "publicNetworkAccessForIngestion", default, skip_serializing_if = "Option::is_none")]
@@ -1318,7 +1372,11 @@ impl InnerError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InnerErrorTrace {
     #[doc = "detailed error trace"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trace: Vec<String>,
 }
 impl InnerErrorTrace {
@@ -1542,7 +1600,11 @@ pub struct MyWorkbookProperties {
     #[doc = "Workbook category, as defined by the user at creation time."]
     pub category: String,
     #[doc = "A list of 0 or more tags that are associated with this private workbook definition"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Unique user id of the specific user that owns this private workbook."]
     #[serde(rename = "userId", default, skip_serializing_if = "Option::is_none")]
@@ -1618,7 +1680,11 @@ impl MyWorkbookUserAssignedIdentities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MyWorkbooksListResult {
     #[doc = "An array of private workbooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MyWorkbook>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1695,7 +1761,11 @@ impl OperationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of CDN operations supported by the CDN resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1740,7 +1810,11 @@ impl OperationLive {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "A collection of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationLive>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2104,7 +2178,11 @@ impl WorkItemConfigurationError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkItemConfigurationsListResult {
     #[doc = "An array of work item configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkItemConfiguration>,
 }
 impl azure_core::Continuable for WorkItemConfigurationsListResult {
@@ -2200,7 +2278,11 @@ impl WorkbookErrorDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkbookInnerErrorTrace {
     #[doc = "detailed error trace"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trace: Vec<String>,
 }
 impl WorkbookInnerErrorTrace {
@@ -2226,7 +2308,11 @@ pub struct WorkbookProperties {
     #[doc = "Workbook category, as defined by the user at creation time."]
     pub category: String,
     #[doc = "Being deprecated, please use the other tags field"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Unique user id of the specific user that owns this workbook."]
     #[serde(rename = "userId", default, skip_serializing_if = "Option::is_none")]
@@ -2274,7 +2360,11 @@ pub struct WorkbookPropertiesUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "A list of 0 or more tags that are associated with this workbook definition"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "The description of the workbook."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2400,7 +2490,11 @@ pub struct WorkbookTemplateErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The list of invalid fields send in request, in case of validation error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<WorkbookTemplateErrorFieldContract>,
 }
 impl WorkbookTemplateErrorBody {
@@ -2457,7 +2551,11 @@ pub struct WorkbookTemplateLocalizedGallery {
     #[serde(rename = "templateData", default, skip_serializing_if = "Option::is_none")]
     pub template_data: Option<serde_json::Value>,
     #[doc = "Workbook galleries supported by the template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub galleries: Vec<WorkbookTemplateGallery>,
 }
 impl WorkbookTemplateLocalizedGallery {
@@ -2542,7 +2640,11 @@ impl WorkbookTemplateUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkbookTemplatesListResult {
     #[doc = "An array of workbook templates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkbookTemplate>,
 }
 impl azure_core::Continuable for WorkbookTemplatesListResult {
@@ -2620,7 +2722,11 @@ pub mod workbook_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkbooksListResult {
     #[doc = "An array of workbooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workbook>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
diff --git a/services/mgmt/applicationinsights/src/package_2022_04_01/models.rs b/services/mgmt/applicationinsights/src/package_2022_04_01/models.rs
index 465cc0fe32..12b9d6a61c 100644
--- a/services/mgmt/applicationinsights/src/package_2022_04_01/models.rs
+++ b/services/mgmt/applicationinsights/src/package_2022_04_01/models.rs
@@ -10,10 +10,20 @@ pub struct ApiKeyRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The read access rights of this API Key."]
-    #[serde(rename = "linkedReadProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedReadProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_read_properties: Vec<String>,
     #[doc = "The write access rights of this API Key."]
-    #[serde(rename = "linkedWriteProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedWriteProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_write_properties: Vec<String>,
 }
 impl ApiKeyRequest {
@@ -76,7 +86,11 @@ impl AnnotationError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AnnotationsListResult {
     #[doc = "An array of annotations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Annotation>,
 }
 impl azure_core::Continuable for AnnotationsListResult {
@@ -130,10 +144,20 @@ pub struct ApplicationInsightsComponentApiKey {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The read access rights of this API Key."]
-    #[serde(rename = "linkedReadProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedReadProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_read_properties: Vec<String>,
     #[doc = "The write access rights of this API Key."]
-    #[serde(rename = "linkedWriteProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedWriteProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_write_properties: Vec<String>,
 }
 impl ApplicationInsightsComponentApiKey {
@@ -297,7 +321,12 @@ impl ApplicationInsightsComponentAnalyticsItemProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationInsightsComponentAvailableFeatures {
     #[doc = "A list of Application Insights component feature."]
-    #[serde(rename = "Result", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Result",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub result: Vec<ApplicationInsightsComponentFeature>,
 }
 impl ApplicationInsightsComponentAvailableFeatures {
@@ -312,7 +341,12 @@ pub struct ApplicationInsightsComponentBillingFeatures {
     #[serde(rename = "DataVolumeCap", default, skip_serializing_if = "Option::is_none")]
     pub data_volume_cap: Option<ApplicationInsightsComponentDataVolumeCap>,
     #[doc = "Current enabled pricing plan. When the component is in the Enterprise plan, this will list both 'Basic' and 'Application Insights Enterprise'."]
-    #[serde(rename = "CurrentBillingFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "CurrentBillingFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub current_billing_features: Vec<String>,
 }
 impl ApplicationInsightsComponentBillingFeatures {
@@ -475,7 +509,12 @@ pub struct ApplicationInsightsComponentFavorite {
     #[serde(rename = "TimeModified", default, skip_serializing_if = "Option::is_none")]
     pub time_modified: Option<String>,
     #[doc = "A list of 0 or more tags that are associated with this favorite definition"]
-    #[serde(rename = "Tags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Tags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Favorite category, as defined by the user at creation time."]
     #[serde(rename = "Category", default, skip_serializing_if = "Option::is_none")]
@@ -522,7 +561,12 @@ pub struct ApplicationInsightsComponentFeature {
     #[serde(rename = "IsHidden", default, skip_serializing_if = "Option::is_none")]
     pub is_hidden: Option<bool>,
     #[doc = "A list of Application Insights component feature capability."]
-    #[serde(rename = "Capabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Capabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ApplicationInsightsComponentFeatureCapability>,
     #[doc = "Display name of the feature."]
     #[serde(rename = "Title", default, skip_serializing_if = "Option::is_none")]
@@ -656,7 +700,12 @@ pub struct ApplicationInsightsComponentProactiveDetectionConfiguration {
     #[serde(rename = "SendEmailsToSubscriptionOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_emails_to_subscription_owners: Option<bool>,
     #[doc = "Custom email addresses for this rule notifications"]
-    #[serde(rename = "CustomEmails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "CustomEmails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_emails: Vec<String>,
     #[doc = "The last time this rule was updated"]
     #[serde(rename = "LastUpdatedTime", default, skip_serializing_if = "Option::is_none")]
@@ -769,7 +818,12 @@ pub struct ApplicationInsightsComponentProperties {
     #[serde(rename = "LaMigrationDate", default, with = "azure_core::date::rfc3339::option")]
     pub la_migration_date: Option<time::OffsetDateTime>,
     #[doc = "List of linked private link scope resources."]
-    #[serde(rename = "PrivateLinkScopedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PrivateLinkScopedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_scoped_resources: Vec<PrivateLinkScopedResource>,
     #[doc = "The network access type for operating on the Application Insights Component. By default it is Enabled"]
     #[serde(rename = "publicNetworkAccessForIngestion", default, skip_serializing_if = "Option::is_none")]
@@ -1318,7 +1372,11 @@ impl InnerError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InnerErrorTrace {
     #[doc = "detailed error trace"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trace: Vec<String>,
 }
 impl InnerErrorTrace {
@@ -1542,7 +1600,11 @@ pub struct MyWorkbookProperties {
     #[doc = "Workbook category, as defined by the user at creation time."]
     pub category: String,
     #[doc = "A list of 0 or more tags that are associated with this private workbook definition"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Unique user id of the specific user that owns this private workbook."]
     #[serde(rename = "userId", default, skip_serializing_if = "Option::is_none")]
@@ -1618,7 +1680,11 @@ impl MyWorkbookUserAssignedIdentities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MyWorkbooksListResult {
     #[doc = "An array of private workbooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MyWorkbook>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1695,7 +1761,11 @@ impl OperationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of CDN operations supported by the CDN resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1740,7 +1810,11 @@ impl OperationLive {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "A collection of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationLive>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2104,7 +2178,11 @@ impl WorkItemConfigurationError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkItemConfigurationsListResult {
     #[doc = "An array of work item configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkItemConfiguration>,
 }
 impl azure_core::Continuable for WorkItemConfigurationsListResult {
@@ -2200,7 +2278,11 @@ impl WorkbookErrorDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkbookInnerErrorTrace {
     #[doc = "detailed error trace"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trace: Vec<String>,
 }
 impl WorkbookInnerErrorTrace {
@@ -2226,7 +2308,11 @@ pub struct WorkbookProperties {
     #[doc = "Workbook category, as defined by the user at creation time."]
     pub category: String,
     #[doc = "Being deprecated, please use the other tags field"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Unique user id of the specific user that owns this workbook."]
     #[serde(rename = "userId", default, skip_serializing_if = "Option::is_none")]
@@ -2274,7 +2360,11 @@ pub struct WorkbookPropertiesUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "A list of 0 or more tags that are associated with this workbook definition"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "The description of the workbook."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2397,7 +2487,11 @@ pub struct WorkbookTemplateErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The list of invalid fields send in request, in case of validation error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<WorkbookTemplateErrorFieldContract>,
 }
 impl WorkbookTemplateErrorBody {
@@ -2454,7 +2548,11 @@ pub struct WorkbookTemplateLocalizedGallery {
     #[serde(rename = "templateData", default, skip_serializing_if = "Option::is_none")]
     pub template_data: Option<serde_json::Value>,
     #[doc = "Workbook galleries supported by the template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub galleries: Vec<WorkbookTemplateGallery>,
 }
 impl WorkbookTemplateLocalizedGallery {
@@ -2539,7 +2637,11 @@ impl WorkbookTemplateUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkbookTemplatesListResult {
     #[doc = "An array of workbook templates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkbookTemplate>,
 }
 impl azure_core::Continuable for WorkbookTemplatesListResult {
@@ -2614,7 +2716,11 @@ pub mod workbook_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkbooksListResult {
     #[doc = "An array of workbooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workbook>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
diff --git a/services/mgmt/applicationinsights/src/package_2022_06_15/models.rs b/services/mgmt/applicationinsights/src/package_2022_06_15/models.rs
index 1bd510bd01..afa7b8d5f0 100644
--- a/services/mgmt/applicationinsights/src/package_2022_06_15/models.rs
+++ b/services/mgmt/applicationinsights/src/package_2022_06_15/models.rs
@@ -10,10 +10,20 @@ pub struct ApiKeyRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The read access rights of this API Key."]
-    #[serde(rename = "linkedReadProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedReadProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_read_properties: Vec<String>,
     #[doc = "The write access rights of this API Key."]
-    #[serde(rename = "linkedWriteProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedWriteProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_write_properties: Vec<String>,
 }
 impl ApiKeyRequest {
@@ -76,7 +86,11 @@ impl AnnotationError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AnnotationsListResult {
     #[doc = "An array of annotations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Annotation>,
 }
 impl azure_core::Continuable for AnnotationsListResult {
@@ -130,10 +144,20 @@ pub struct ApplicationInsightsComponentApiKey {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The read access rights of this API Key."]
-    #[serde(rename = "linkedReadProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedReadProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_read_properties: Vec<String>,
     #[doc = "The write access rights of this API Key."]
-    #[serde(rename = "linkedWriteProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedWriteProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_write_properties: Vec<String>,
 }
 impl ApplicationInsightsComponentApiKey {
@@ -297,7 +321,12 @@ impl ApplicationInsightsComponentAnalyticsItemProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationInsightsComponentAvailableFeatures {
     #[doc = "A list of Application Insights component feature."]
-    #[serde(rename = "Result", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Result",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub result: Vec<ApplicationInsightsComponentFeature>,
 }
 impl ApplicationInsightsComponentAvailableFeatures {
@@ -312,7 +341,12 @@ pub struct ApplicationInsightsComponentBillingFeatures {
     #[serde(rename = "DataVolumeCap", default, skip_serializing_if = "Option::is_none")]
     pub data_volume_cap: Option<ApplicationInsightsComponentDataVolumeCap>,
     #[doc = "Current enabled pricing plan. When the component is in the Enterprise plan, this will list both 'Basic' and 'Application Insights Enterprise'."]
-    #[serde(rename = "CurrentBillingFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "CurrentBillingFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub current_billing_features: Vec<String>,
 }
 impl ApplicationInsightsComponentBillingFeatures {
@@ -475,7 +509,12 @@ pub struct ApplicationInsightsComponentFavorite {
     #[serde(rename = "TimeModified", default, skip_serializing_if = "Option::is_none")]
     pub time_modified: Option<String>,
     #[doc = "A list of 0 or more tags that are associated with this favorite definition"]
-    #[serde(rename = "Tags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Tags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Favorite category, as defined by the user at creation time."]
     #[serde(rename = "Category", default, skip_serializing_if = "Option::is_none")]
@@ -522,7 +561,12 @@ pub struct ApplicationInsightsComponentFeature {
     #[serde(rename = "IsHidden", default, skip_serializing_if = "Option::is_none")]
     pub is_hidden: Option<bool>,
     #[doc = "A list of Application Insights component feature capability."]
-    #[serde(rename = "Capabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Capabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ApplicationInsightsComponentFeatureCapability>,
     #[doc = "Display name of the feature."]
     #[serde(rename = "Title", default, skip_serializing_if = "Option::is_none")]
@@ -656,7 +700,12 @@ pub struct ApplicationInsightsComponentProactiveDetectionConfiguration {
     #[serde(rename = "SendEmailsToSubscriptionOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_emails_to_subscription_owners: Option<bool>,
     #[doc = "Custom email addresses for this rule notifications"]
-    #[serde(rename = "CustomEmails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "CustomEmails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_emails: Vec<String>,
     #[doc = "The last time this rule was updated"]
     #[serde(rename = "LastUpdatedTime", default, skip_serializing_if = "Option::is_none")]
@@ -769,7 +818,12 @@ pub struct ApplicationInsightsComponentProperties {
     #[serde(rename = "LaMigrationDate", default, with = "azure_core::date::rfc3339::option")]
     pub la_migration_date: Option<time::OffsetDateTime>,
     #[doc = "List of linked private link scope resources."]
-    #[serde(rename = "PrivateLinkScopedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PrivateLinkScopedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_scoped_resources: Vec<PrivateLinkScopedResource>,
     #[doc = "The network access type for operating on the Application Insights Component. By default it is Enabled"]
     #[serde(rename = "publicNetworkAccessForIngestion", default, skip_serializing_if = "Option::is_none")]
@@ -1242,7 +1296,11 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The list of invalid fields send in request, in case of validation error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorFieldContract>,
 }
 impl azure_core::Continuable for ErrorResponse {
@@ -1354,7 +1412,11 @@ impl InnerError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InnerErrorTrace {
     #[doc = "detailed error trace"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trace: Vec<String>,
 }
 impl InnerErrorTrace {
@@ -1578,7 +1640,11 @@ pub struct MyWorkbookProperties {
     #[doc = "Workbook category, as defined by the user at creation time."]
     pub category: String,
     #[doc = "A list of 0 or more tags that are associated with this private workbook definition"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Unique user id of the specific user that owns this private workbook."]
     #[serde(rename = "userId", default, skip_serializing_if = "Option::is_none")]
@@ -1654,7 +1720,11 @@ impl MyWorkbookUserAssignedIdentities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MyWorkbooksListResult {
     #[doc = "An array of private workbooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MyWorkbook>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1731,7 +1801,11 @@ impl OperationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Workbook operations supported by the Microsoft.Insights resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1776,7 +1850,11 @@ impl OperationLive {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "A collection of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationLive>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2077,7 +2155,12 @@ pub mod web_test_properties {
         #[serde(rename = "RequestUrl", default, skip_serializing_if = "Option::is_none")]
         pub request_url: Option<String>,
         #[doc = "List of headers and their values to add to the WebTest call."]
-        #[serde(rename = "Headers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "Headers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub headers: Vec<HeaderField>,
         #[doc = "Http verb to use for this web test."]
         #[serde(rename = "HttpVerb", default, skip_serializing_if = "Option::is_none")]
@@ -2224,7 +2307,11 @@ impl WorkItemConfigurationError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkItemConfigurationsListResult {
     #[doc = "An array of work item configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkItemConfiguration>,
 }
 impl azure_core::Continuable for WorkItemConfigurationsListResult {
@@ -2320,7 +2407,11 @@ impl WorkbookErrorDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkbookInnerErrorTrace {
     #[doc = "detailed error trace"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trace: Vec<String>,
 }
 impl WorkbookInnerErrorTrace {
@@ -2346,7 +2437,11 @@ pub struct WorkbookProperties {
     #[doc = "Workbook category, as defined by the user at creation time."]
     pub category: String,
     #[doc = "Being deprecated, please use the other tags field"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Unique user id of the specific user that owns this workbook."]
     #[serde(rename = "userId", default, skip_serializing_if = "Option::is_none")]
@@ -2394,7 +2489,11 @@ pub struct WorkbookPropertiesUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "A list of 0 or more tags that are associated with this workbook definition"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "The description of the workbook."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2517,7 +2616,11 @@ pub struct WorkbookTemplateErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The list of invalid fields send in request, in case of validation error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<WorkbookTemplateErrorFieldContract>,
 }
 impl WorkbookTemplateErrorBody {
@@ -2574,7 +2677,11 @@ pub struct WorkbookTemplateLocalizedGallery {
     #[serde(rename = "templateData", default, skip_serializing_if = "Option::is_none")]
     pub template_data: Option<serde_json::Value>,
     #[doc = "Workbook galleries supported by the template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub galleries: Vec<WorkbookTemplateGallery>,
 }
 impl WorkbookTemplateLocalizedGallery {
@@ -2659,7 +2766,11 @@ impl WorkbookTemplateUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkbookTemplatesListResult {
     #[doc = "An array of workbook templates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkbookTemplate>,
 }
 impl azure_core::Continuable for WorkbookTemplatesListResult {
@@ -2734,7 +2845,11 @@ pub mod workbook_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkbooksListResult {
     #[doc = "An array of workbooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workbook>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
diff --git a/services/mgmt/applicationinsights/src/package_preview_2020_02/models.rs b/services/mgmt/applicationinsights/src/package_preview_2020_02/models.rs
index 82ce450735..7cccece471 100644
--- a/services/mgmt/applicationinsights/src/package_preview_2020_02/models.rs
+++ b/services/mgmt/applicationinsights/src/package_preview_2020_02/models.rs
@@ -64,7 +64,11 @@ impl OperationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "A collection of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/appplatform/src/package_preview_2021_09/models.rs b/services/mgmt/appplatform/src/package_preview_2021_09/models.rs
index a09a1efab6..9f4851cac6 100644
--- a/services/mgmt/appplatform/src/package_preview_2021_09/models.rs
+++ b/services/mgmt/appplatform/src/package_preview_2021_09/models.rs
@@ -27,7 +27,11 @@ impl AppResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AppResourceCollection {
     #[doc = "Collection of App resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AppResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -137,7 +141,11 @@ pub mod app_resource_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -157,7 +165,11 @@ impl AvailableOperations {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableRuntimeVersions {
     #[doc = "A list of all supported runtime versions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SupportedRuntimeVersion>,
 }
 impl AvailableRuntimeVersions {
@@ -200,7 +212,11 @@ impl BindingResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BindingResourceCollection {
     #[doc = "Collection of Binding resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BindingResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -275,7 +291,12 @@ pub struct CertificateProperties {
     #[serde(rename = "subjectName", default, skip_serializing_if = "Option::is_none")]
     pub subject_name: Option<String>,
     #[doc = "The domain list of certificate."]
-    #[serde(rename = "dnsNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_names: Vec<String>,
 }
 impl CertificateProperties {
@@ -310,7 +331,11 @@ impl CertificateResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateResourceCollection {
     #[doc = "The certificate resources list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateResource>,
     #[doc = "The link to next page of certificate list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -358,7 +383,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -489,7 +518,11 @@ pub mod cluster_resource_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ConfigServerGitProperty {
     #[doc = "Repositories of git."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub repositories: Vec<GitPatternRepository>,
     #[doc = "URI of the repository"]
     pub uri: String,
@@ -497,7 +530,12 @@ pub struct ConfigServerGitProperty {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Searching path of the repository"]
-    #[serde(rename = "searchPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_paths: Vec<String>,
     #[doc = "Username of git repository basic auth."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -634,7 +672,11 @@ pub struct ConfigServerSettingsErrorRecord {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub uri: Option<String>,
     #[doc = "The detail error messages of the record"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub messages: Vec<String>,
 }
 impl ConfigServerSettingsErrorRecord {
@@ -649,7 +691,11 @@ pub struct ConfigServerSettingsValidateResult {
     #[serde(rename = "isValid", default, skip_serializing_if = "Option::is_none")]
     pub is_valid: Option<bool>,
     #[doc = "The detail validation results"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ConfigServerSettingsErrorRecord>,
 }
 impl ConfigServerSettingsValidateResult {
@@ -684,10 +730,18 @@ pub struct CustomContainer {
     #[serde(rename = "containerImage", default, skip_serializing_if = "Option::is_none")]
     pub container_image: Option<String>,
     #[doc = "Entrypoint array. Not executed within a shell. The docker image's ENTRYPOINT is used if this is not provided."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "Arguments to the entrypoint. The docker image's CMD is used if this is not provided."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub args: Vec<String>,
     #[doc = "Credential of the image registry"]
     #[serde(rename = "imageRegistryCredential", default, skip_serializing_if = "Option::is_none")]
@@ -734,7 +788,11 @@ impl CustomDomainResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomDomainResourceCollection {
     #[doc = "The custom domain resources list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomDomainResource>,
     #[doc = "The link to next page of custom domain list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -791,7 +849,12 @@ pub struct CustomPersistentDiskProperties {
     #[serde(rename = "readOnly", default, skip_serializing_if = "Option::is_none")]
     pub read_only: Option<bool>,
     #[doc = "These are the mount options for a persistent disk."]
-    #[serde(rename = "mountOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_options: Vec<String>,
 }
 impl CustomPersistentDiskProperties {
@@ -905,7 +968,11 @@ impl DeploymentResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeploymentResourceCollection {
     #[doc = "Collection of Deployment resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeploymentResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -947,7 +1014,11 @@ pub struct DeploymentResourceProperties {
     #[serde(rename = "createdTime", default, with = "azure_core::date::rfc3339::option")]
     pub created_time: Option<time::OffsetDateTime>,
     #[doc = "Collection of instances belong to the Deployment"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<DeploymentInstance>,
 }
 impl DeploymentResourceProperties {
@@ -1180,7 +1251,11 @@ pub struct GitPatternRepository {
     #[doc = "Name of the repository"]
     pub name: String,
     #[doc = "Collection of pattern of the repository"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern: Vec<String>,
     #[doc = "URI of the repository"]
     pub uri: String,
@@ -1188,7 +1263,12 @@ pub struct GitPatternRepository {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Searching path of the repository"]
-    #[serde(rename = "searchPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_paths: Vec<String>,
     #[doc = "Username of git repository basic auth."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1421,16 +1501,30 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Optional. If set to true, then zero will be returned for time duration where no metric is emitted/published."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
     pub fill_gap_with_zero: Option<bool>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Name of the MDM namespace. Optional."]
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
@@ -1580,7 +1674,12 @@ pub struct NetworkProfile {
     #[serde(rename = "outboundIPs", default, skip_serializing_if = "Option::is_none")]
     pub outbound_i_ps: Option<network_profile::OutboundIPs>,
     #[doc = "Required inbound or outbound traffics for Azure Spring Cloud instance."]
-    #[serde(rename = "requiredTraffics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredTraffics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_traffics: Vec<RequiredTraffic>,
 }
 impl NetworkProfile {
@@ -1594,7 +1693,12 @@ pub mod network_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct OutboundIPs {
         #[doc = "A list of public IP addresses."]
-        #[serde(rename = "publicIPs", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "publicIPs",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub public_i_ps: Vec<String>,
     }
     impl OutboundIPs {
@@ -1792,10 +1896,18 @@ pub struct RequiredTraffic {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub port: Option<i32>,
     #[doc = "The ip list of required traffic"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ips: Vec<String>,
     #[doc = "The FQDN list of required traffic"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdns: Vec<String>,
     #[doc = "The direction of required traffic"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1895,13 +2007,26 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<SkuCapacity>,
     #[doc = "Gets the set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Gets a list of locations and availability zones in those locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "Gets the restrictions because of which SKU cannot be used. This is\r\nempty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -1927,7 +2052,11 @@ impl ResourceSkuCapabilities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuCollection {
     #[doc = "Collection of resource SKU"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceSku>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1951,10 +2080,19 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "Gets list of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Gets details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ResourceSkuZoneDetails>,
 }
 impl ResourceSkuLocationInfo {
@@ -1966,10 +2104,18 @@ impl ResourceSkuLocationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuRestrictionInfo {
     #[doc = "Gets locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Gets list of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuRestrictionInfo {
@@ -1984,7 +2130,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "Gets the value of restrictions. If the restriction type is set to\r\nlocation. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Information about the restriction where the SKU cannot be used"]
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
@@ -2079,10 +2229,18 @@ pub mod resource_sku_restrictions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuZoneDetails {
     #[doc = "Gets the set of zones that the SKU is available in with the\r\nspecified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
     #[doc = "Gets a list of capabilities that are available for the SKU in the\r\nspecified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
 }
 impl ResourceSkuZoneDetails {
@@ -2126,7 +2284,11 @@ impl ServiceResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceResourceList {
     #[doc = "Collection of Service resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2147,10 +2309,20 @@ impl ServiceResourceList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -2335,7 +2507,11 @@ impl StorageResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageResourceCollection {
     #[doc = "The storage resources list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageResource>,
     #[doc = "The link to next page of storage list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/appplatform/src/package_preview_2022_01/models.rs b/services/mgmt/appplatform/src/package_preview_2022_01/models.rs
index 738927f19e..6e8f1db07e 100644
--- a/services/mgmt/appplatform/src/package_preview_2022_01/models.rs
+++ b/services/mgmt/appplatform/src/package_preview_2022_01/models.rs
@@ -7,7 +7,12 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActiveDeploymentCollection {
     #[doc = "Collection of Deployment name."]
-    #[serde(rename = "activeDeploymentNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeDeploymentNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_deployment_names: Vec<String>,
 }
 impl ActiveDeploymentCollection {
@@ -53,7 +58,11 @@ impl ApiPortalCustomDomainResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiPortalCustomDomainResourceCollection {
     #[doc = "Collection of API portal custom domain resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiPortalCustomDomainResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -101,10 +110,20 @@ pub struct ApiPortalProperties {
     #[serde(rename = "httpsOnly", default, skip_serializing_if = "Option::is_none")]
     pub https_only: Option<bool>,
     #[doc = "The array of resource Ids of gateway to integrate with API portal."]
-    #[serde(rename = "gatewayIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gatewayIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gateway_ids: Vec<String>,
     #[doc = "Collection of OpenAPI source URL locations."]
-    #[serde(rename = "sourceUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_urls: Vec<String>,
     #[doc = "Single sign-on related configuration"]
     #[serde(rename = "ssoProperties", default, skip_serializing_if = "Option::is_none")]
@@ -113,7 +132,11 @@ pub struct ApiPortalProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<ApiPortalResourceRequests>,
     #[doc = "Collection of instances belong to API portal."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<ApiPortalInstance>,
 }
 impl ApiPortalProperties {
@@ -188,7 +211,11 @@ impl ApiPortalResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiPortalResourceCollection {
     #[doc = "Collection of API portal resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiPortalResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -244,7 +271,11 @@ impl AppResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AppResourceCollection {
     #[doc = "Collection of App resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AppResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -353,7 +384,11 @@ pub mod app_resource_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -373,7 +408,11 @@ impl AvailableOperations {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableRuntimeVersions {
     #[doc = "A list of all supported runtime versions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SupportedRuntimeVersion>,
 }
 impl AvailableRuntimeVersions {
@@ -416,7 +455,11 @@ impl BindingResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BindingResourceCollection {
     #[doc = "Collection of Binding resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BindingResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -484,7 +527,11 @@ impl Build {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildCollection {
     #[doc = "Collection of Build resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Build>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -592,7 +639,11 @@ impl BuildResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildResultCollection {
     #[doc = "Collection of Build result resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuildResult>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -634,7 +685,12 @@ pub struct BuildResultProperties {
     #[serde(rename = "buildPodName", default, skip_serializing_if = "Option::is_none")]
     pub build_pod_name: Option<String>,
     #[doc = "All of the build stage (init-container and container) resources in build pod."]
-    #[serde(rename = "buildStages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "buildStages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub build_stages: Vec<BuildStageProperties>,
 }
 impl BuildResultProperties {
@@ -752,7 +808,11 @@ impl BuildServiceAgentPoolResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildServiceAgentPoolResourceCollection {
     #[doc = "Collection of build service agent pool resource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuildServiceAgentPoolResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -791,7 +851,11 @@ impl BuildServiceAgentPoolSizeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildServiceCollection {
     #[doc = "Collection of Build service resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuildService>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -956,7 +1020,12 @@ pub struct BuilderProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub stack: Option<StackProperties>,
     #[doc = "Builder buildpack groups."]
-    #[serde(rename = "buildpackGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "buildpackGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub buildpack_groups: Vec<BuildpacksGroupProperties>,
 }
 impl BuilderProperties {
@@ -1028,7 +1097,11 @@ impl BuilderResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuilderResourceCollection {
     #[doc = "Collection of Builder resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuilderResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1188,7 +1261,11 @@ impl BuildpackBindingResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildpackBindingResourceCollection {
     #[doc = "Collection of BuildpackBinding resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuildpackBindingResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1224,7 +1301,11 @@ pub struct BuildpacksGroupProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Buildpacks in the buildpack group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub buildpacks: Vec<BuildpackProperties>,
 }
 impl BuildpacksGroupProperties {
@@ -1257,7 +1338,12 @@ pub struct CertificateProperties {
     #[serde(rename = "subjectName", default, skip_serializing_if = "Option::is_none")]
     pub subject_name: Option<String>,
     #[doc = "The domain list of certificate."]
-    #[serde(rename = "dnsNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_names: Vec<String>,
 }
 impl CertificateProperties {
@@ -1292,7 +1378,11 @@ impl CertificateResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateResourceCollection {
     #[doc = "The certificate resources list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateResource>,
     #[doc = "The link to next page of certificate list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1340,7 +1430,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -1476,7 +1570,11 @@ pub mod cluster_resource_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ConfigServerGitProperty {
     #[doc = "Repositories of git."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub repositories: Vec<GitPatternRepository>,
     #[doc = "URI of the repository"]
     pub uri: String,
@@ -1484,7 +1582,12 @@ pub struct ConfigServerGitProperty {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Searching path of the repository"]
-    #[serde(rename = "searchPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_paths: Vec<String>,
     #[doc = "Username of git repository basic auth."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1621,7 +1724,11 @@ pub struct ConfigServerSettingsErrorRecord {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub uri: Option<String>,
     #[doc = "The detail error messages of the record"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub messages: Vec<String>,
 }
 impl ConfigServerSettingsErrorRecord {
@@ -1636,7 +1743,11 @@ pub struct ConfigServerSettingsValidateResult {
     #[serde(rename = "isValid", default, skip_serializing_if = "Option::is_none")]
     pub is_valid: Option<bool>,
     #[doc = "The detail validation results"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ConfigServerSettingsErrorRecord>,
 }
 impl ConfigServerSettingsValidateResult {
@@ -1664,7 +1775,12 @@ pub struct ConfigurationServiceGitPropertyValidateResult {
     #[serde(rename = "isValid", default, skip_serializing_if = "Option::is_none")]
     pub is_valid: Option<bool>,
     #[doc = "The detail validation results"]
-    #[serde(rename = "gitReposValidationResult", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gitReposValidationResult",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub git_repos_validation_result: Vec<ValidationMessages>,
 }
 impl ConfigurationServiceGitPropertyValidateResult {
@@ -1684,7 +1800,12 @@ pub struct ConfigurationServiceGitRepository {
     #[doc = "Label of the repository"]
     pub label: String,
     #[doc = "Searching path of the repository"]
-    #[serde(rename = "searchPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_paths: Vec<String>,
     #[doc = "Username of git repository basic auth."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1747,7 +1868,11 @@ pub struct ConfigurationServiceProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<ConfigurationServiceResourceRequests>,
     #[doc = "Collection of instances belong to Application Configuration Service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<ConfigurationServiceInstance>,
     #[doc = "The settings of Application Configuration Service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1822,7 +1947,11 @@ impl ConfigurationServiceResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationServiceResourceCollection {
     #[doc = "Collection of configuration service resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationServiceResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1920,10 +2049,18 @@ pub struct CustomContainer {
     #[serde(rename = "containerImage", default, skip_serializing_if = "Option::is_none")]
     pub container_image: Option<String>,
     #[doc = "Entrypoint array. Not executed within a shell. The docker image's ENTRYPOINT is used if this is not provided."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "Arguments to the entrypoint. The docker image's CMD is used if this is not provided."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub args: Vec<String>,
     #[doc = "Credential of the image registry"]
     #[serde(rename = "imageRegistryCredential", default, skip_serializing_if = "Option::is_none")]
@@ -1987,7 +2124,11 @@ impl CustomDomainResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomDomainResourceCollection {
     #[doc = "The custom domain resources list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomDomainResource>,
     #[doc = "The link to next page of custom domain list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2044,7 +2185,12 @@ pub struct CustomPersistentDiskProperties {
     #[serde(rename = "readOnly", default, skip_serializing_if = "Option::is_none")]
     pub read_only: Option<bool>,
     #[doc = "These are the mount options for a persistent disk."]
-    #[serde(rename = "mountOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_options: Vec<String>,
 }
 impl CustomPersistentDiskProperties {
@@ -2161,7 +2307,11 @@ impl DeploymentResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeploymentResourceCollection {
     #[doc = "Collection of Deployment resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeploymentResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2197,7 +2347,11 @@ pub struct DeploymentResourceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub active: Option<bool>,
     #[doc = "Collection of instances belong to the Deployment"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<DeploymentInstance>,
 }
 impl DeploymentResourceProperties {
@@ -2383,16 +2537,28 @@ pub struct GatewayApiRoute {
     #[serde(rename = "tokenRelay", default, skip_serializing_if = "Option::is_none")]
     pub token_relay: Option<bool>,
     #[doc = "A number of conditions to evaluate a route for each request. Each predicate may be evaluated against request headers and parameter values. All of the predicates associated with a route must evaluate to true for the route to be matched to the request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub predicates: Vec<String>,
     #[doc = "To modify the request before sending it to the target endpoint, or the received response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<String>,
     #[doc = "Route processing order."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub order: Option<i32>,
     #[doc = "Classification tags, will be applied to methods in the generated OpenAPI documentation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
 }
 impl GatewayApiRoute {
@@ -2404,13 +2570,28 @@ impl GatewayApiRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCorsProperties {
     #[doc = "Allowed origins to make cross-site requests. The special value `*` allows all domains."]
-    #[serde(rename = "allowedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_origins: Vec<String>,
     #[doc = "Allowed HTTP methods on cross-site requests. The special value `*` allows all methods. If not set, `GET` and `HEAD` are allowed by default."]
-    #[serde(rename = "allowedMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_methods: Vec<String>,
     #[doc = "Allowed headers in cross-site requests. The special value `*` allows actual requests to send any header."]
-    #[serde(rename = "allowedHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_headers: Vec<String>,
     #[doc = "How long, in seconds, the response from a pre-flight request can be cached by clients."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -2419,7 +2600,12 @@ pub struct GatewayCorsProperties {
     #[serde(rename = "allowCredentials", default, skip_serializing_if = "Option::is_none")]
     pub allow_credentials: Option<bool>,
     #[doc = "HTTP response headers to expose for cross-site requests."]
-    #[serde(rename = "exposedHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exposedHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exposed_headers: Vec<String>,
 }
 impl GatewayCorsProperties {
@@ -2457,7 +2643,11 @@ impl GatewayCustomDomainResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCustomDomainResourceCollection {
     #[doc = "Collection of Spring Cloud Gateway custom domain resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayCustomDomainResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2496,7 +2686,11 @@ pub struct GatewayOperatorProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<GatewayOperatorResourceRequests>,
     #[doc = "Collection of instances belong to Spring Cloud Gateway operator."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<GatewayInstance>,
 }
 impl GatewayOperatorProperties {
@@ -2550,7 +2744,11 @@ pub struct GatewayProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<GatewayResourceRequests>,
     #[doc = "Collection of instances belong to Spring Cloud Gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<GatewayInstance>,
     #[doc = "Properties of the Spring Cloud Gateway Operator."]
     #[serde(rename = "operatorProperties", default, skip_serializing_if = "Option::is_none")]
@@ -2628,7 +2826,11 @@ impl GatewayResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayResourceCollection {
     #[doc = "Collection of gateway resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2670,7 +2872,11 @@ pub struct GatewayRouteConfigProperties {
     #[serde(rename = "appResourceId", default, skip_serializing_if = "Option::is_none")]
     pub app_resource_id: Option<String>,
     #[doc = "Array of API routes, each route contains properties such as `title`, `uri`, `ssoEnabled`, `predicates`, `filters`."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<GatewayApiRoute>,
 }
 impl GatewayRouteConfigProperties {
@@ -2742,7 +2948,11 @@ impl GatewayRouteConfigResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayRouteConfigResourceCollection {
     #[doc = "Collection of Spring Cloud Gateway route config resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayRouteConfigResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2765,7 +2975,11 @@ pub struct GitPatternRepository {
     #[doc = "Name of the repository"]
     pub name: String,
     #[doc = "Collection of pattern of the repository"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern: Vec<String>,
     #[doc = "URI of the repository"]
     pub uri: String,
@@ -2773,7 +2987,12 @@ pub struct GitPatternRepository {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Searching path of the repository"]
-    #[serde(rename = "searchPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_paths: Vec<String>,
     #[doc = "Username of git repository basic auth."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3027,16 +3246,30 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Optional. If set to true, then zero will be returned for time duration where no metric is emitted/published."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
     pub fill_gap_with_zero: Option<bool>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Name of the MDM namespace. Optional."]
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
@@ -3207,7 +3440,12 @@ pub struct NetworkProfile {
     #[serde(rename = "outboundIPs", default, skip_serializing_if = "Option::is_none")]
     pub outbound_i_ps: Option<network_profile::OutboundIPs>,
     #[doc = "Required inbound or outbound traffics for Azure Spring Cloud instance."]
-    #[serde(rename = "requiredTraffics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredTraffics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_traffics: Vec<RequiredTraffic>,
 }
 impl NetworkProfile {
@@ -3221,7 +3459,12 @@ pub mod network_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct OutboundIPs {
         #[doc = "A list of public IP addresses."]
-        #[serde(rename = "publicIPs", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "publicIPs",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub public_i_ps: Vec<String>,
     }
     impl OutboundIPs {
@@ -3419,10 +3662,18 @@ pub struct RequiredTraffic {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub port: Option<i32>,
     #[doc = "The ip list of required traffic"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ips: Vec<String>,
     #[doc = "The FQDN list of required traffic"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdns: Vec<String>,
     #[doc = "The direction of required traffic"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3525,13 +3776,26 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<SkuCapacity>,
     #[doc = "Gets the set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Gets a list of locations and availability zones in those locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "Gets the restrictions because of which SKU cannot be used. This is\r\nempty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -3557,7 +3821,11 @@ impl ResourceSkuCapabilities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuCollection {
     #[doc = "Collection of resource SKU"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceSku>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3581,10 +3849,19 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "Gets list of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Gets details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ResourceSkuZoneDetails>,
 }
 impl ResourceSkuLocationInfo {
@@ -3596,10 +3873,18 @@ impl ResourceSkuLocationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuRestrictionInfo {
     #[doc = "Gets locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Gets list of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuRestrictionInfo {
@@ -3614,7 +3899,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "Gets the value of restrictions. If the restriction type is set to\r\nlocation. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Information about the restriction where the SKU cannot be used"]
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
@@ -3709,10 +3998,18 @@ pub mod resource_sku_restrictions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuZoneDetails {
     #[doc = "Gets the set of zones that the SKU is available in with the\r\nspecified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
     #[doc = "Gets a list of capabilities that are available for the SKU in the\r\nspecified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
 }
 impl ResourceSkuZoneDetails {
@@ -3760,7 +4057,11 @@ pub struct ServiceRegistryProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<ServiceRegistryResourceRequests>,
     #[doc = "Collection of instances belong to Service Registry."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<ServiceRegistryInstance>,
 }
 impl ServiceRegistryProperties {
@@ -3832,7 +4133,11 @@ impl ServiceRegistryResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceRegistryResourceCollection {
     #[doc = "Collection of Service Registry resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceRegistryResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3888,7 +4193,11 @@ impl ServiceResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceResourceList {
     #[doc = "Collection of Service resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3909,10 +4218,20 @@ impl ServiceResourceList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -4030,7 +4349,11 @@ impl SourceUploadedUserSourceInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SsoProperties {
     #[doc = "It defines the specific actions applications can be allowed to do on a user's behalf"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scope: Vec<String>,
     #[doc = "The public identifier for the application"]
     #[serde(rename = "clientId", default, skip_serializing_if = "Option::is_none")]
@@ -4151,7 +4474,11 @@ impl StorageResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageResourceCollection {
     #[doc = "The storage resources list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageResource>,
     #[doc = "The link to next page of storage list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4198,7 +4525,11 @@ impl SupportedBuildpackResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedBuildpacksCollection {
     #[doc = "Collection of supported buildpacks resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SupportedBuildpackResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4346,7 +4677,11 @@ impl SupportedStackResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedStacksCollection {
     #[doc = "Collection of supported stacks resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SupportedStackResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4576,7 +4911,11 @@ pub struct ValidationMessages {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Detailed validation messages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub messages: Vec<String>,
 }
 impl ValidationMessages {
diff --git a/services/mgmt/appplatform/src/package_preview_2022_03/models.rs b/services/mgmt/appplatform/src/package_preview_2022_03/models.rs
index 9ef4671596..581a6c51bb 100644
--- a/services/mgmt/appplatform/src/package_preview_2022_03/models.rs
+++ b/services/mgmt/appplatform/src/package_preview_2022_03/models.rs
@@ -7,7 +7,12 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActiveDeploymentCollection {
     #[doc = "Collection of Deployment name."]
-    #[serde(rename = "activeDeploymentNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeDeploymentNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_deployment_names: Vec<String>,
 }
 impl ActiveDeploymentCollection {
@@ -53,7 +58,11 @@ impl ApiPortalCustomDomainResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiPortalCustomDomainResourceCollection {
     #[doc = "Collection of API portal custom domain resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiPortalCustomDomainResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -101,10 +110,20 @@ pub struct ApiPortalProperties {
     #[serde(rename = "httpsOnly", default, skip_serializing_if = "Option::is_none")]
     pub https_only: Option<bool>,
     #[doc = "The array of resource Ids of gateway to integrate with API portal."]
-    #[serde(rename = "gatewayIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gatewayIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gateway_ids: Vec<String>,
     #[doc = "Collection of OpenAPI source URL locations."]
-    #[serde(rename = "sourceUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_urls: Vec<String>,
     #[doc = "Single sign-on related configuration"]
     #[serde(rename = "ssoProperties", default, skip_serializing_if = "Option::is_none")]
@@ -113,7 +132,11 @@ pub struct ApiPortalProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<ApiPortalResourceRequests>,
     #[doc = "Collection of instances belong to API portal."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<ApiPortalInstance>,
 }
 impl ApiPortalProperties {
@@ -188,7 +211,11 @@ impl ApiPortalResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiPortalResourceCollection {
     #[doc = "Collection of API portal resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiPortalResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -244,7 +271,11 @@ impl AppResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AppResourceCollection {
     #[doc = "Collection of App resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AppResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -353,7 +384,11 @@ pub mod app_resource_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -373,7 +408,11 @@ impl AvailableOperations {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableRuntimeVersions {
     #[doc = "A list of all supported runtime versions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SupportedRuntimeVersion>,
 }
 impl AvailableRuntimeVersions {
@@ -416,7 +455,11 @@ impl BindingResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BindingResourceCollection {
     #[doc = "Collection of Binding resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BindingResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -484,7 +527,11 @@ impl Build {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildCollection {
     #[doc = "Collection of Build resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Build>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -592,7 +639,11 @@ impl BuildResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildResultCollection {
     #[doc = "Collection of Build result resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuildResult>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -634,7 +685,12 @@ pub struct BuildResultProperties {
     #[serde(rename = "buildPodName", default, skip_serializing_if = "Option::is_none")]
     pub build_pod_name: Option<String>,
     #[doc = "All of the build stage (init-container and container) resources in build pod."]
-    #[serde(rename = "buildStages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "buildStages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub build_stages: Vec<BuildStageProperties>,
 }
 impl BuildResultProperties {
@@ -752,7 +808,11 @@ impl BuildServiceAgentPoolResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildServiceAgentPoolResourceCollection {
     #[doc = "Collection of build service agent pool resource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuildServiceAgentPoolResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -791,7 +851,11 @@ impl BuildServiceAgentPoolSizeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildServiceCollection {
     #[doc = "Collection of Build service resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuildService>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -956,7 +1020,12 @@ pub struct BuilderProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub stack: Option<StackProperties>,
     #[doc = "Builder buildpack groups."]
-    #[serde(rename = "buildpackGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "buildpackGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub buildpack_groups: Vec<BuildpacksGroupProperties>,
 }
 impl BuilderProperties {
@@ -1028,7 +1097,11 @@ impl BuilderResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuilderResourceCollection {
     #[doc = "Collection of Builder resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuilderResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1188,7 +1261,11 @@ impl BuildpackBindingResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildpackBindingResourceCollection {
     #[doc = "Collection of BuildpackBinding resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuildpackBindingResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1224,7 +1301,11 @@ pub struct BuildpacksGroupProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Buildpacks in the buildpack group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub buildpacks: Vec<BuildpackProperties>,
 }
 impl BuildpacksGroupProperties {
@@ -1257,7 +1338,12 @@ pub struct CertificateProperties {
     #[serde(rename = "subjectName", default, skip_serializing_if = "Option::is_none")]
     pub subject_name: Option<String>,
     #[doc = "The domain list of certificate."]
-    #[serde(rename = "dnsNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_names: Vec<String>,
 }
 impl CertificateProperties {
@@ -1292,7 +1378,11 @@ impl CertificateResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateResourceCollection {
     #[doc = "The certificate resources list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateResource>,
     #[doc = "The link to next page of certificate list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1340,7 +1430,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -1476,7 +1570,11 @@ pub mod cluster_resource_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ConfigServerGitProperty {
     #[doc = "Repositories of git."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub repositories: Vec<GitPatternRepository>,
     #[doc = "URI of the repository"]
     pub uri: String,
@@ -1484,7 +1582,12 @@ pub struct ConfigServerGitProperty {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Searching path of the repository"]
-    #[serde(rename = "searchPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_paths: Vec<String>,
     #[doc = "Username of git repository basic auth."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1621,7 +1724,11 @@ pub struct ConfigServerSettingsErrorRecord {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub uri: Option<String>,
     #[doc = "The detail error messages of the record"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub messages: Vec<String>,
 }
 impl ConfigServerSettingsErrorRecord {
@@ -1636,7 +1743,11 @@ pub struct ConfigServerSettingsValidateResult {
     #[serde(rename = "isValid", default, skip_serializing_if = "Option::is_none")]
     pub is_valid: Option<bool>,
     #[doc = "The detail validation results"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ConfigServerSettingsErrorRecord>,
 }
 impl ConfigServerSettingsValidateResult {
@@ -1664,7 +1775,12 @@ pub struct ConfigurationServiceGitPropertyValidateResult {
     #[serde(rename = "isValid", default, skip_serializing_if = "Option::is_none")]
     pub is_valid: Option<bool>,
     #[doc = "The detail validation results"]
-    #[serde(rename = "gitReposValidationResult", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gitReposValidationResult",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub git_repos_validation_result: Vec<ValidationMessages>,
 }
 impl ConfigurationServiceGitPropertyValidateResult {
@@ -1684,7 +1800,12 @@ pub struct ConfigurationServiceGitRepository {
     #[doc = "Label of the repository"]
     pub label: String,
     #[doc = "Searching path of the repository"]
-    #[serde(rename = "searchPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_paths: Vec<String>,
     #[doc = "Username of git repository basic auth."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1747,7 +1868,11 @@ pub struct ConfigurationServiceProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<ConfigurationServiceResourceRequests>,
     #[doc = "Collection of instances belong to Application Configuration Service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<ConfigurationServiceInstance>,
     #[doc = "The settings of Application Configuration Service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1822,7 +1947,11 @@ impl ConfigurationServiceResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationServiceResourceCollection {
     #[doc = "Collection of configuration service resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationServiceResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1920,10 +2049,18 @@ pub struct CustomContainer {
     #[serde(rename = "containerImage", default, skip_serializing_if = "Option::is_none")]
     pub container_image: Option<String>,
     #[doc = "Entrypoint array. Not executed within a shell. The docker image's ENTRYPOINT is used if this is not provided."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "Arguments to the entrypoint. The docker image's CMD is used if this is not provided."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub args: Vec<String>,
     #[doc = "Credential of the image registry"]
     #[serde(rename = "imageRegistryCredential", default, skip_serializing_if = "Option::is_none")]
@@ -1990,7 +2127,11 @@ impl CustomDomainResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomDomainResourceCollection {
     #[doc = "The custom domain resources list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomDomainResource>,
     #[doc = "The link to next page of custom domain list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2047,7 +2188,12 @@ pub struct CustomPersistentDiskProperties {
     #[serde(rename = "readOnly", default, skip_serializing_if = "Option::is_none")]
     pub read_only: Option<bool>,
     #[doc = "These are the mount options for a persistent disk."]
-    #[serde(rename = "mountOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_options: Vec<String>,
 }
 impl CustomPersistentDiskProperties {
@@ -2164,7 +2310,11 @@ impl DeploymentResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeploymentResourceCollection {
     #[doc = "Collection of Deployment resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeploymentResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2200,7 +2350,11 @@ pub struct DeploymentResourceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub active: Option<bool>,
     #[doc = "Collection of instances belong to the Deployment"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<DeploymentInstance>,
 }
 impl DeploymentResourceProperties {
@@ -2386,16 +2540,28 @@ pub struct GatewayApiRoute {
     #[serde(rename = "tokenRelay", default, skip_serializing_if = "Option::is_none")]
     pub token_relay: Option<bool>,
     #[doc = "A number of conditions to evaluate a route for each request. Each predicate may be evaluated against request headers and parameter values. All of the predicates associated with a route must evaluate to true for the route to be matched to the request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub predicates: Vec<String>,
     #[doc = "To modify the request before sending it to the target endpoint, or the received response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<String>,
     #[doc = "Route processing order."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub order: Option<i32>,
     #[doc = "Classification tags, will be applied to methods in the generated OpenAPI documentation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
 }
 impl GatewayApiRoute {
@@ -2407,13 +2573,28 @@ impl GatewayApiRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCorsProperties {
     #[doc = "Allowed origins to make cross-site requests. The special value `*` allows all domains."]
-    #[serde(rename = "allowedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_origins: Vec<String>,
     #[doc = "Allowed HTTP methods on cross-site requests. The special value `*` allows all methods. If not set, `GET` and `HEAD` are allowed by default."]
-    #[serde(rename = "allowedMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_methods: Vec<String>,
     #[doc = "Allowed headers in cross-site requests. The special value `*` allows actual requests to send any header."]
-    #[serde(rename = "allowedHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_headers: Vec<String>,
     #[doc = "How long, in seconds, the response from a pre-flight request can be cached by clients."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -2422,7 +2603,12 @@ pub struct GatewayCorsProperties {
     #[serde(rename = "allowCredentials", default, skip_serializing_if = "Option::is_none")]
     pub allow_credentials: Option<bool>,
     #[doc = "HTTP response headers to expose for cross-site requests."]
-    #[serde(rename = "exposedHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exposedHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exposed_headers: Vec<String>,
 }
 impl GatewayCorsProperties {
@@ -2460,7 +2646,11 @@ impl GatewayCustomDomainResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCustomDomainResourceCollection {
     #[doc = "Collection of Spring Cloud Gateway custom domain resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayCustomDomainResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2499,7 +2689,11 @@ pub struct GatewayOperatorProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<GatewayOperatorResourceRequests>,
     #[doc = "Collection of instances belong to Spring Cloud Gateway operator."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<GatewayInstance>,
 }
 impl GatewayOperatorProperties {
@@ -2553,7 +2747,11 @@ pub struct GatewayProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<GatewayResourceRequests>,
     #[doc = "Collection of instances belong to Spring Cloud Gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<GatewayInstance>,
     #[doc = "Properties of the Spring Cloud Gateway Operator."]
     #[serde(rename = "operatorProperties", default, skip_serializing_if = "Option::is_none")]
@@ -2631,7 +2829,11 @@ impl GatewayResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayResourceCollection {
     #[doc = "Collection of gateway resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2673,7 +2875,11 @@ pub struct GatewayRouteConfigProperties {
     #[serde(rename = "appResourceId", default, skip_serializing_if = "Option::is_none")]
     pub app_resource_id: Option<String>,
     #[doc = "Array of API routes, each route contains properties such as `title`, `uri`, `ssoEnabled`, `predicates`, `filters`."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<GatewayApiRoute>,
 }
 impl GatewayRouteConfigProperties {
@@ -2745,7 +2951,11 @@ impl GatewayRouteConfigResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayRouteConfigResourceCollection {
     #[doc = "Collection of Spring Cloud Gateway route config resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayRouteConfigResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2768,7 +2978,11 @@ pub struct GitPatternRepository {
     #[doc = "Name of the repository"]
     pub name: String,
     #[doc = "Collection of pattern of the repository"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern: Vec<String>,
     #[doc = "URI of the repository"]
     pub uri: String,
@@ -2776,7 +2990,12 @@ pub struct GitPatternRepository {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Searching path of the repository"]
-    #[serde(rename = "searchPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_paths: Vec<String>,
     #[doc = "Username of git repository basic auth."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3033,16 +3252,30 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Optional. If set to true, then zero will be returned for time duration where no metric is emitted/published."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
     pub fill_gap_with_zero: Option<bool>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Name of the MDM namespace. Optional."]
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
@@ -3213,7 +3446,12 @@ pub struct NetworkProfile {
     #[serde(rename = "outboundIPs", default, skip_serializing_if = "Option::is_none")]
     pub outbound_i_ps: Option<network_profile::OutboundIPs>,
     #[doc = "Required inbound or outbound traffics for Azure Spring Cloud instance."]
-    #[serde(rename = "requiredTraffics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredTraffics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_traffics: Vec<RequiredTraffic>,
 }
 impl NetworkProfile {
@@ -3227,7 +3465,12 @@ pub mod network_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct OutboundIPs {
         #[doc = "A list of public IP addresses."]
-        #[serde(rename = "publicIPs", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "publicIPs",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub public_i_ps: Vec<String>,
     }
     impl OutboundIPs {
@@ -3425,10 +3668,18 @@ pub struct RequiredTraffic {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub port: Option<i32>,
     #[doc = "The ip list of required traffic"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ips: Vec<String>,
     #[doc = "The FQDN list of required traffic"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdns: Vec<String>,
     #[doc = "The direction of required traffic"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3531,13 +3782,26 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<SkuCapacity>,
     #[doc = "Gets the set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Gets a list of locations and availability zones in those locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "Gets the restrictions because of which SKU cannot be used. This is\r\nempty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -3563,7 +3827,11 @@ impl ResourceSkuCapabilities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuCollection {
     #[doc = "Collection of resource SKU"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceSku>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3587,10 +3855,19 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "Gets list of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Gets details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ResourceSkuZoneDetails>,
 }
 impl ResourceSkuLocationInfo {
@@ -3602,10 +3879,18 @@ impl ResourceSkuLocationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuRestrictionInfo {
     #[doc = "Gets locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Gets list of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuRestrictionInfo {
@@ -3620,7 +3905,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "Gets the value of restrictions. If the restriction type is set to\r\nlocation. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Information about the restriction where the SKU cannot be used"]
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
@@ -3715,10 +4004,18 @@ pub mod resource_sku_restrictions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuZoneDetails {
     #[doc = "Gets the set of zones that the SKU is available in with the\r\nspecified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
     #[doc = "Gets a list of capabilities that are available for the SKU in the\r\nspecified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
 }
 impl ResourceSkuZoneDetails {
@@ -3766,7 +4063,11 @@ pub struct ServiceRegistryProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<ServiceRegistryResourceRequests>,
     #[doc = "Collection of instances belong to Service Registry."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<ServiceRegistryInstance>,
 }
 impl ServiceRegistryProperties {
@@ -3838,7 +4139,11 @@ impl ServiceRegistryResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceRegistryResourceCollection {
     #[doc = "Collection of Service Registry resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceRegistryResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3894,7 +4199,11 @@ impl ServiceResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceResourceList {
     #[doc = "Collection of Service resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3915,10 +4224,20 @@ impl ServiceResourceList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -4036,7 +4355,11 @@ impl SourceUploadedUserSourceInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SsoProperties {
     #[doc = "It defines the specific actions applications can be allowed to do on a user's behalf"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scope: Vec<String>,
     #[doc = "The public identifier for the application"]
     #[serde(rename = "clientId", default, skip_serializing_if = "Option::is_none")]
@@ -4157,7 +4480,11 @@ impl StorageResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageResourceCollection {
     #[doc = "The storage resources list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageResource>,
     #[doc = "The link to next page of storage list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4204,7 +4531,11 @@ impl SupportedBuildpackResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedBuildpacksCollection {
     #[doc = "Collection of supported buildpacks resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SupportedBuildpackResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4352,7 +4683,11 @@ impl SupportedStackResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedStacksCollection {
     #[doc = "Collection of supported stacks resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SupportedStackResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4605,7 +4940,11 @@ pub struct ValidationMessages {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Detailed validation messages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub messages: Vec<String>,
 }
 impl ValidationMessages {
diff --git a/services/mgmt/appplatform/src/package_preview_2022_05/models.rs b/services/mgmt/appplatform/src/package_preview_2022_05/models.rs
index 2534103dac..6876cf3577 100644
--- a/services/mgmt/appplatform/src/package_preview_2022_05/models.rs
+++ b/services/mgmt/appplatform/src/package_preview_2022_05/models.rs
@@ -7,7 +7,12 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActiveDeploymentCollection {
     #[doc = "Collection of Deployment name."]
-    #[serde(rename = "activeDeploymentNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeDeploymentNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_deployment_names: Vec<String>,
 }
 impl ActiveDeploymentCollection {
@@ -53,7 +58,11 @@ impl ApiPortalCustomDomainResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiPortalCustomDomainResourceCollection {
     #[doc = "Collection of API portal custom domain resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiPortalCustomDomainResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -101,10 +110,20 @@ pub struct ApiPortalProperties {
     #[serde(rename = "httpsOnly", default, skip_serializing_if = "Option::is_none")]
     pub https_only: Option<bool>,
     #[doc = "The array of resource Ids of gateway to integrate with API portal."]
-    #[serde(rename = "gatewayIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gatewayIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gateway_ids: Vec<String>,
     #[doc = "Collection of OpenAPI source URL locations."]
-    #[serde(rename = "sourceUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_urls: Vec<String>,
     #[doc = "Single sign-on related configuration"]
     #[serde(rename = "ssoProperties", default, skip_serializing_if = "Option::is_none")]
@@ -113,7 +132,11 @@ pub struct ApiPortalProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<ApiPortalResourceRequests>,
     #[doc = "Collection of instances belong to API portal."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<ApiPortalInstance>,
 }
 impl ApiPortalProperties {
@@ -188,7 +211,11 @@ impl ApiPortalResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiPortalResourceCollection {
     #[doc = "Collection of API portal resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiPortalResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -244,7 +271,11 @@ impl AppResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AppResourceCollection {
     #[doc = "Collection of App resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AppResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -371,7 +402,11 @@ impl AppVNetAddons {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -391,7 +426,11 @@ impl AvailableOperations {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableRuntimeVersions {
     #[doc = "A list of all supported runtime versions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SupportedRuntimeVersion>,
 }
 impl AvailableRuntimeVersions {
@@ -434,7 +473,11 @@ impl BindingResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BindingResourceCollection {
     #[doc = "Collection of Binding resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BindingResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -502,7 +545,11 @@ impl Build {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildCollection {
     #[doc = "Collection of Build resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Build>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -628,7 +675,11 @@ impl BuildResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildResultCollection {
     #[doc = "Collection of Build result resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuildResult>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -670,7 +721,12 @@ pub struct BuildResultProperties {
     #[serde(rename = "buildPodName", default, skip_serializing_if = "Option::is_none")]
     pub build_pod_name: Option<String>,
     #[doc = "All of the build stage (init-container and container) resources in build pod."]
-    #[serde(rename = "buildStages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "buildStages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub build_stages: Vec<BuildStageProperties>,
 }
 impl BuildResultProperties {
@@ -788,7 +844,11 @@ impl BuildServiceAgentPoolResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildServiceAgentPoolResourceCollection {
     #[doc = "Collection of build service agent pool resource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuildServiceAgentPoolResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -827,7 +887,11 @@ impl BuildServiceAgentPoolSizeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildServiceCollection {
     #[doc = "Collection of Build service resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuildService>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -992,7 +1056,12 @@ pub struct BuilderProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub stack: Option<StackProperties>,
     #[doc = "Builder buildpack groups."]
-    #[serde(rename = "buildpackGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "buildpackGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub buildpack_groups: Vec<BuildpacksGroupProperties>,
 }
 impl BuilderProperties {
@@ -1064,7 +1133,11 @@ impl BuilderResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuilderResourceCollection {
     #[doc = "Collection of Builder resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuilderResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1224,7 +1297,11 @@ impl BuildpackBindingResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildpackBindingResourceCollection {
     #[doc = "Collection of BuildpackBinding resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuildpackBindingResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1260,7 +1337,11 @@ pub struct BuildpacksGroupProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Buildpacks in the buildpack group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub buildpacks: Vec<BuildpackProperties>,
 }
 impl BuildpacksGroupProperties {
@@ -1293,7 +1374,12 @@ pub struct CertificateProperties {
     #[serde(rename = "subjectName", default, skip_serializing_if = "Option::is_none")]
     pub subject_name: Option<String>,
     #[doc = "The domain list of certificate."]
-    #[serde(rename = "dnsNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_names: Vec<String>,
     #[doc = "Provisioning state of the Certificate"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1378,7 +1464,11 @@ impl CertificateResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateResourceCollection {
     #[doc = "The certificate resources list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateResource>,
     #[doc = "The link to next page of certificate list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1426,7 +1516,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -1568,7 +1662,11 @@ pub mod cluster_resource_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ConfigServerGitProperty {
     #[doc = "Repositories of git."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub repositories: Vec<GitPatternRepository>,
     #[doc = "URI of the repository"]
     pub uri: String,
@@ -1576,7 +1674,12 @@ pub struct ConfigServerGitProperty {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Searching path of the repository"]
-    #[serde(rename = "searchPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_paths: Vec<String>,
     #[doc = "Username of git repository basic auth."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1713,7 +1816,11 @@ pub struct ConfigServerSettingsErrorRecord {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub uri: Option<String>,
     #[doc = "The detail error messages of the record"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub messages: Vec<String>,
 }
 impl ConfigServerSettingsErrorRecord {
@@ -1728,7 +1835,11 @@ pub struct ConfigServerSettingsValidateResult {
     #[serde(rename = "isValid", default, skip_serializing_if = "Option::is_none")]
     pub is_valid: Option<bool>,
     #[doc = "The detail validation results"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ConfigServerSettingsErrorRecord>,
 }
 impl ConfigServerSettingsValidateResult {
@@ -1756,7 +1867,12 @@ pub struct ConfigurationServiceGitPropertyValidateResult {
     #[serde(rename = "isValid", default, skip_serializing_if = "Option::is_none")]
     pub is_valid: Option<bool>,
     #[doc = "The detail validation results"]
-    #[serde(rename = "gitReposValidationResult", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gitReposValidationResult",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub git_repos_validation_result: Vec<ValidationMessages>,
 }
 impl ConfigurationServiceGitPropertyValidateResult {
@@ -1776,7 +1892,12 @@ pub struct ConfigurationServiceGitRepository {
     #[doc = "Label of the repository"]
     pub label: String,
     #[doc = "Searching path of the repository"]
-    #[serde(rename = "searchPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_paths: Vec<String>,
     #[doc = "Username of git repository basic auth."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1839,7 +1960,11 @@ pub struct ConfigurationServiceProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<ConfigurationServiceResourceRequests>,
     #[doc = "Collection of instances belong to Application Configuration Service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<ConfigurationServiceInstance>,
     #[doc = "The settings of Application Configuration Service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1914,7 +2039,11 @@ impl ConfigurationServiceResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationServiceResourceCollection {
     #[doc = "Collection of configuration service resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationServiceResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2012,10 +2141,18 @@ pub struct CustomContainer {
     #[serde(rename = "containerImage", default, skip_serializing_if = "Option::is_none")]
     pub container_image: Option<String>,
     #[doc = "Entrypoint array. Not executed within a shell. The docker image's ENTRYPOINT is used if this is not provided."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "Arguments to the entrypoint. The docker image's CMD is used if this is not provided."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub args: Vec<String>,
     #[doc = "Credential of the image registry"]
     #[serde(rename = "imageRegistryCredential", default, skip_serializing_if = "Option::is_none")]
@@ -2131,7 +2268,11 @@ impl CustomDomainResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomDomainResourceCollection {
     #[doc = "The custom domain resources list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomDomainResource>,
     #[doc = "The link to next page of custom domain list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2188,7 +2329,12 @@ pub struct CustomPersistentDiskProperties {
     #[serde(rename = "readOnly", default, skip_serializing_if = "Option::is_none")]
     pub read_only: Option<bool>,
     #[doc = "These are the mount options for a persistent disk."]
-    #[serde(rename = "mountOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_options: Vec<String>,
 }
 impl CustomPersistentDiskProperties {
@@ -2305,7 +2451,11 @@ impl DeploymentResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeploymentResourceCollection {
     #[doc = "Collection of Deployment resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeploymentResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2341,7 +2491,11 @@ pub struct DeploymentResourceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub active: Option<bool>,
     #[doc = "Collection of instances belong to the Deployment"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<DeploymentInstance>,
 }
 impl DeploymentResourceProperties {
@@ -2502,7 +2656,11 @@ pub struct ExecAction {
     #[serde(flatten)]
     pub probe_action: ProbeAction,
     #[doc = "Command is the command line to execute inside the container, the working directory for the command is root ('/') in the container's filesystem. The command is not run inside a shell, so traditional shell instructions ('|', etc) won't work. To use a shell, you need to explicitly call out to that shell. Exit status of 0 is treated as live/healthy and non-zero is unhealthy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
 }
 impl ExecAction {
@@ -2556,16 +2714,28 @@ pub struct GatewayApiRoute {
     #[serde(rename = "tokenRelay", default, skip_serializing_if = "Option::is_none")]
     pub token_relay: Option<bool>,
     #[doc = "A number of conditions to evaluate a route for each request. Each predicate may be evaluated against request headers and parameter values. All of the predicates associated with a route must evaluate to true for the route to be matched to the request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub predicates: Vec<String>,
     #[doc = "To modify the request before sending it to the target endpoint, or the received response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<String>,
     #[doc = "Route processing order."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub order: Option<i32>,
     #[doc = "Classification tags, will be applied to methods in the generated OpenAPI documentation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
 }
 impl GatewayApiRoute {
@@ -2577,13 +2747,28 @@ impl GatewayApiRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCorsProperties {
     #[doc = "Allowed origins to make cross-site requests. The special value `*` allows all domains."]
-    #[serde(rename = "allowedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_origins: Vec<String>,
     #[doc = "Allowed HTTP methods on cross-site requests. The special value `*` allows all methods. If not set, `GET` and `HEAD` are allowed by default."]
-    #[serde(rename = "allowedMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_methods: Vec<String>,
     #[doc = "Allowed headers in cross-site requests. The special value `*` allows actual requests to send any header."]
-    #[serde(rename = "allowedHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_headers: Vec<String>,
     #[doc = "How long, in seconds, the response from a pre-flight request can be cached by clients."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -2592,7 +2777,12 @@ pub struct GatewayCorsProperties {
     #[serde(rename = "allowCredentials", default, skip_serializing_if = "Option::is_none")]
     pub allow_credentials: Option<bool>,
     #[doc = "HTTP response headers to expose for cross-site requests."]
-    #[serde(rename = "exposedHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exposedHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exposed_headers: Vec<String>,
 }
 impl GatewayCorsProperties {
@@ -2630,7 +2820,11 @@ impl GatewayCustomDomainResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCustomDomainResourceCollection {
     #[doc = "Collection of Spring Cloud Gateway custom domain resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayCustomDomainResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2669,7 +2863,11 @@ pub struct GatewayOperatorProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<GatewayOperatorResourceRequests>,
     #[doc = "Collection of instances belong to Spring Cloud Gateway operator."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<GatewayInstance>,
 }
 impl GatewayOperatorProperties {
@@ -2723,7 +2921,11 @@ pub struct GatewayProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<GatewayResourceRequests>,
     #[doc = "Collection of instances belong to Spring Cloud Gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<GatewayInstance>,
     #[doc = "Properties of the Spring Cloud Gateway Operator."]
     #[serde(rename = "operatorProperties", default, skip_serializing_if = "Option::is_none")]
@@ -2801,7 +3003,11 @@ impl GatewayResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayResourceCollection {
     #[doc = "Collection of gateway resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2858,7 +3064,11 @@ pub struct GatewayRouteConfigProperties {
     #[serde(rename = "openApi", default, skip_serializing_if = "Option::is_none")]
     pub open_api: Option<GatewayRouteConfigOpenApiProperties>,
     #[doc = "Array of API routes, each route contains properties such as `title`, `uri`, `ssoEnabled`, `predicates`, `filters`."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<GatewayApiRoute>,
 }
 impl GatewayRouteConfigProperties {
@@ -2930,7 +3140,11 @@ impl GatewayRouteConfigResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayRouteConfigResourceCollection {
     #[doc = "Collection of Spring Cloud Gateway route config resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayRouteConfigResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2953,7 +3167,11 @@ pub struct GitPatternRepository {
     #[doc = "Name of the repository"]
     pub name: String,
     #[doc = "Collection of pattern of the repository"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern: Vec<String>,
     #[doc = "URI of the repository"]
     pub uri: String,
@@ -2961,7 +3179,12 @@ pub struct GitPatternRepository {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Searching path of the repository"]
-    #[serde(rename = "searchPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_paths: Vec<String>,
     #[doc = "Username of git repository basic auth."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3311,16 +3534,30 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Optional. If set to true, then zero will be returned for time duration where no metric is emitted/published."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
     pub fill_gap_with_zero: Option<bool>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Name of the MDM namespace. Optional."]
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
@@ -3491,7 +3728,12 @@ pub struct NetworkProfile {
     #[serde(rename = "outboundIPs", default, skip_serializing_if = "Option::is_none")]
     pub outbound_i_ps: Option<network_profile::OutboundIPs>,
     #[doc = "Required inbound or outbound traffics for Azure Spring Apps resource."]
-    #[serde(rename = "requiredTraffics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredTraffics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_traffics: Vec<RequiredTraffic>,
     #[doc = "Ingress configuration payload for Azure Spring Apps resource."]
     #[serde(rename = "ingressConfig", default, skip_serializing_if = "Option::is_none")]
@@ -3508,7 +3750,12 @@ pub mod network_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct OutboundIPs {
         #[doc = "A list of public IP addresses."]
-        #[serde(rename = "publicIPs", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "publicIPs",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub public_i_ps: Vec<String>,
     }
     impl OutboundIPs {
@@ -3800,10 +4047,18 @@ pub struct RequiredTraffic {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub port: Option<i32>,
     #[doc = "The ip list of required traffic"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ips: Vec<String>,
     #[doc = "The FQDN list of required traffic"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdns: Vec<String>,
     #[doc = "The direction of required traffic"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3906,13 +4161,26 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<SkuCapacity>,
     #[doc = "Gets the set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Gets a list of locations and availability zones in those locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "Gets the restrictions because of which SKU cannot be used. This is\r\nempty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -3938,7 +4206,11 @@ impl ResourceSkuCapabilities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuCollection {
     #[doc = "Collection of resource SKU"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceSku>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3962,10 +4234,19 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "Gets list of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Gets details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ResourceSkuZoneDetails>,
 }
 impl ResourceSkuLocationInfo {
@@ -3977,10 +4258,18 @@ impl ResourceSkuLocationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuRestrictionInfo {
     #[doc = "Gets locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Gets list of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuRestrictionInfo {
@@ -3995,7 +4284,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "Gets the value of restrictions. If the restriction type is set to\r\nlocation. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Information about the restriction where the SKU cannot be used"]
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
@@ -4090,10 +4383,18 @@ pub mod resource_sku_restrictions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuZoneDetails {
     #[doc = "Gets the set of zones that the SKU is available in with the\r\nspecified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
     #[doc = "Gets a list of capabilities that are available for the SKU in the\r\nspecified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
 }
 impl ResourceSkuZoneDetails {
@@ -4141,7 +4442,11 @@ pub struct ServiceRegistryProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<ServiceRegistryResourceRequests>,
     #[doc = "Collection of instances belong to Service Registry."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<ServiceRegistryInstance>,
 }
 impl ServiceRegistryProperties {
@@ -4213,7 +4518,11 @@ impl ServiceRegistryResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceRegistryResourceCollection {
     #[doc = "Collection of Service Registry resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceRegistryResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4269,7 +4578,11 @@ impl ServiceResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceResourceList {
     #[doc = "Collection of Service resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4290,10 +4603,20 @@ impl ServiceResourceList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -4423,7 +4746,11 @@ impl SourceUploadedUserSourceInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SsoProperties {
     #[doc = "It defines the specific actions applications can be allowed to do on a user's behalf"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scope: Vec<String>,
     #[doc = "The public identifier for the application"]
     #[serde(rename = "clientId", default, skip_serializing_if = "Option::is_none")]
@@ -4544,7 +4871,11 @@ impl StorageResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageResourceCollection {
     #[doc = "The storage resources list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageResource>,
     #[doc = "The link to next page of storage list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4591,7 +4922,11 @@ impl SupportedBuildpackResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedBuildpacksCollection {
     #[doc = "Collection of supported buildpacks resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SupportedBuildpackResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4739,7 +5074,11 @@ impl SupportedStackResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedStacksCollection {
     #[doc = "Collection of supported stacks resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SupportedStackResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5003,7 +5342,11 @@ pub struct ValidationMessages {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Detailed validation messages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub messages: Vec<String>,
 }
 impl ValidationMessages {
diff --git a/services/mgmt/appplatform/src/package_preview_2022_09/models.rs b/services/mgmt/appplatform/src/package_preview_2022_09/models.rs
index 621ce11bfc..1a36ec1d75 100644
--- a/services/mgmt/appplatform/src/package_preview_2022_09/models.rs
+++ b/services/mgmt/appplatform/src/package_preview_2022_09/models.rs
@@ -7,7 +7,12 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActiveDeploymentCollection {
     #[doc = "Collection of Deployment name."]
-    #[serde(rename = "activeDeploymentNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeDeploymentNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_deployment_names: Vec<String>,
 }
 impl ActiveDeploymentCollection {
@@ -53,7 +58,11 @@ impl ApiPortalCustomDomainResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiPortalCustomDomainResourceCollection {
     #[doc = "Collection of API portal custom domain resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiPortalCustomDomainResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -101,10 +110,20 @@ pub struct ApiPortalProperties {
     #[serde(rename = "httpsOnly", default, skip_serializing_if = "Option::is_none")]
     pub https_only: Option<bool>,
     #[doc = "The array of resource Ids of gateway to integrate with API portal."]
-    #[serde(rename = "gatewayIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gatewayIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gateway_ids: Vec<String>,
     #[doc = "Collection of OpenAPI source URL locations."]
-    #[serde(rename = "sourceUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_urls: Vec<String>,
     #[doc = "Single sign-on related configuration"]
     #[serde(rename = "ssoProperties", default, skip_serializing_if = "Option::is_none")]
@@ -113,7 +132,11 @@ pub struct ApiPortalProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<ApiPortalResourceRequests>,
     #[doc = "Collection of instances belong to API portal."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<ApiPortalInstance>,
 }
 impl ApiPortalProperties {
@@ -188,7 +211,11 @@ impl ApiPortalResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiPortalResourceCollection {
     #[doc = "Collection of API portal resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiPortalResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -244,7 +271,11 @@ impl AppResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AppResourceCollection {
     #[doc = "Collection of App resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AppResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -374,7 +405,11 @@ impl AppVNetAddons {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -394,7 +429,11 @@ impl AvailableOperations {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableRuntimeVersions {
     #[doc = "A list of all supported runtime versions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SupportedRuntimeVersion>,
 }
 impl AvailableRuntimeVersions {
@@ -437,7 +476,11 @@ impl BindingResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BindingResourceCollection {
     #[doc = "Collection of Binding resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BindingResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -505,7 +548,11 @@ impl Build {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildCollection {
     #[doc = "Collection of Build resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Build>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -631,7 +678,11 @@ impl BuildResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildResultCollection {
     #[doc = "Collection of Build result resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuildResult>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -673,7 +724,12 @@ pub struct BuildResultProperties {
     #[serde(rename = "buildPodName", default, skip_serializing_if = "Option::is_none")]
     pub build_pod_name: Option<String>,
     #[doc = "All of the build stage (init-container and container) resources in build pod."]
-    #[serde(rename = "buildStages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "buildStages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub build_stages: Vec<BuildStageProperties>,
 }
 impl BuildResultProperties {
@@ -791,7 +847,11 @@ impl BuildServiceAgentPoolResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildServiceAgentPoolResourceCollection {
     #[doc = "Collection of build service agent pool resource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuildServiceAgentPoolResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -830,7 +890,11 @@ impl BuildServiceAgentPoolSizeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildServiceCollection {
     #[doc = "Collection of Build service resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuildService>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -995,7 +1059,12 @@ pub struct BuilderProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub stack: Option<StackProperties>,
     #[doc = "Builder buildpack groups."]
-    #[serde(rename = "buildpackGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "buildpackGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub buildpack_groups: Vec<BuildpacksGroupProperties>,
 }
 impl BuilderProperties {
@@ -1067,7 +1136,11 @@ impl BuilderResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuilderResourceCollection {
     #[doc = "Collection of Builder resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuilderResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1227,7 +1300,11 @@ impl BuildpackBindingResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BuildpackBindingResourceCollection {
     #[doc = "Collection of BuildpackBinding resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BuildpackBindingResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1263,7 +1340,11 @@ pub struct BuildpacksGroupProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Buildpacks in the buildpack group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub buildpacks: Vec<BuildpackProperties>,
 }
 impl BuildpacksGroupProperties {
@@ -1296,7 +1377,12 @@ pub struct CertificateProperties {
     #[serde(rename = "subjectName", default, skip_serializing_if = "Option::is_none")]
     pub subject_name: Option<String>,
     #[doc = "The domain list of certificate."]
-    #[serde(rename = "dnsNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_names: Vec<String>,
     #[doc = "Provisioning state of the Certificate"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1381,7 +1467,11 @@ impl CertificateResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateResourceCollection {
     #[doc = "The certificate resources list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateResource>,
     #[doc = "The link to next page of certificate list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1429,7 +1519,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -1571,7 +1665,11 @@ pub mod cluster_resource_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ConfigServerGitProperty {
     #[doc = "Repositories of git."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub repositories: Vec<GitPatternRepository>,
     #[doc = "URI of the repository"]
     pub uri: String,
@@ -1579,7 +1677,12 @@ pub struct ConfigServerGitProperty {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Searching path of the repository"]
-    #[serde(rename = "searchPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_paths: Vec<String>,
     #[doc = "Username of git repository basic auth."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1716,7 +1819,11 @@ pub struct ConfigServerSettingsErrorRecord {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub uri: Option<String>,
     #[doc = "The detail error messages of the record"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub messages: Vec<String>,
 }
 impl ConfigServerSettingsErrorRecord {
@@ -1731,7 +1838,11 @@ pub struct ConfigServerSettingsValidateResult {
     #[serde(rename = "isValid", default, skip_serializing_if = "Option::is_none")]
     pub is_valid: Option<bool>,
     #[doc = "The detail validation results"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ConfigServerSettingsErrorRecord>,
 }
 impl ConfigServerSettingsValidateResult {
@@ -1759,7 +1870,12 @@ pub struct ConfigurationServiceGitPropertyValidateResult {
     #[serde(rename = "isValid", default, skip_serializing_if = "Option::is_none")]
     pub is_valid: Option<bool>,
     #[doc = "The detail validation results"]
-    #[serde(rename = "gitReposValidationResult", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gitReposValidationResult",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub git_repos_validation_result: Vec<ValidationMessages>,
 }
 impl ConfigurationServiceGitPropertyValidateResult {
@@ -1779,7 +1895,12 @@ pub struct ConfigurationServiceGitRepository {
     #[doc = "Label of the repository"]
     pub label: String,
     #[doc = "Searching path of the repository"]
-    #[serde(rename = "searchPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_paths: Vec<String>,
     #[doc = "Username of git repository basic auth."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1842,7 +1963,11 @@ pub struct ConfigurationServiceProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<ConfigurationServiceResourceRequests>,
     #[doc = "Collection of instances belong to Application Configuration Service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<ConfigurationServiceInstance>,
     #[doc = "The settings of Application Configuration Service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1917,7 +2042,11 @@ impl ConfigurationServiceResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationServiceResourceCollection {
     #[doc = "Collection of configuration service resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationServiceResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2015,10 +2144,18 @@ pub struct CustomContainer {
     #[serde(rename = "containerImage", default, skip_serializing_if = "Option::is_none")]
     pub container_image: Option<String>,
     #[doc = "Entrypoint array. Not executed within a shell. The docker image's ENTRYPOINT is used if this is not provided."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "Arguments to the entrypoint. The docker image's CMD is used if this is not provided."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub args: Vec<String>,
     #[doc = "Credential of the image registry"]
     #[serde(rename = "imageRegistryCredential", default, skip_serializing_if = "Option::is_none")]
@@ -2134,7 +2271,11 @@ impl CustomDomainResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomDomainResourceCollection {
     #[doc = "The custom domain resources list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomDomainResource>,
     #[doc = "The link to next page of custom domain list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2191,7 +2332,12 @@ pub struct CustomPersistentDiskProperties {
     #[serde(rename = "readOnly", default, skip_serializing_if = "Option::is_none")]
     pub read_only: Option<bool>,
     #[doc = "These are the mount options for a persistent disk."]
-    #[serde(rename = "mountOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_options: Vec<String>,
 }
 impl CustomPersistentDiskProperties {
@@ -2291,7 +2437,11 @@ impl DeploymentInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeploymentList {
     #[doc = "A list of deployment resource ids."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployments: Vec<String>,
 }
 impl DeploymentList {
@@ -2320,7 +2470,11 @@ impl DeploymentResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeploymentResourceCollection {
     #[doc = "Collection of Deployment resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeploymentResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2356,7 +2510,11 @@ pub struct DeploymentResourceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub active: Option<bool>,
     #[doc = "Collection of instances belong to the Deployment"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<DeploymentInstance>,
 }
 impl DeploymentResourceProperties {
@@ -2517,7 +2675,11 @@ pub struct ExecAction {
     #[serde(flatten)]
     pub probe_action: ProbeAction,
     #[doc = "Command is the command line to execute inside the container, the working directory for the command is root ('/') in the container's filesystem. The command is not run inside a shell, so traditional shell instructions ('|', etc) won't work. To use a shell, you need to explicitly call out to that shell. Exit status of 0 is treated as live/healthy and non-zero is unhealthy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
 }
 impl ExecAction {
@@ -2571,16 +2733,28 @@ pub struct GatewayApiRoute {
     #[serde(rename = "tokenRelay", default, skip_serializing_if = "Option::is_none")]
     pub token_relay: Option<bool>,
     #[doc = "A number of conditions to evaluate a route for each request. Each predicate may be evaluated against request headers and parameter values. All of the predicates associated with a route must evaluate to true for the route to be matched to the request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub predicates: Vec<String>,
     #[doc = "To modify the request before sending it to the target endpoint, or the received response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<String>,
     #[doc = "Route processing order."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub order: Option<i32>,
     #[doc = "Classification tags, will be applied to methods in the generated OpenAPI documentation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
 }
 impl GatewayApiRoute {
@@ -2592,13 +2766,28 @@ impl GatewayApiRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCorsProperties {
     #[doc = "Allowed origins to make cross-site requests. The special value `*` allows all domains."]
-    #[serde(rename = "allowedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_origins: Vec<String>,
     #[doc = "Allowed HTTP methods on cross-site requests. The special value `*` allows all methods. If not set, `GET` and `HEAD` are allowed by default."]
-    #[serde(rename = "allowedMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_methods: Vec<String>,
     #[doc = "Allowed headers in cross-site requests. The special value `*` allows actual requests to send any header."]
-    #[serde(rename = "allowedHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_headers: Vec<String>,
     #[doc = "How long, in seconds, the response from a pre-flight request can be cached by clients."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -2607,7 +2796,12 @@ pub struct GatewayCorsProperties {
     #[serde(rename = "allowCredentials", default, skip_serializing_if = "Option::is_none")]
     pub allow_credentials: Option<bool>,
     #[doc = "HTTP response headers to expose for cross-site requests."]
-    #[serde(rename = "exposedHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exposedHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exposed_headers: Vec<String>,
 }
 impl GatewayCorsProperties {
@@ -2645,7 +2839,11 @@ impl GatewayCustomDomainResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayCustomDomainResourceCollection {
     #[doc = "Collection of Spring Cloud Gateway custom domain resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayCustomDomainResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2684,7 +2882,11 @@ pub struct GatewayOperatorProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<GatewayOperatorResourceRequests>,
     #[doc = "Collection of instances belong to Spring Cloud Gateway operator."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<GatewayInstance>,
 }
 impl GatewayOperatorProperties {
@@ -2738,7 +2940,11 @@ pub struct GatewayProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<GatewayResourceRequests>,
     #[doc = "Collection of instances belong to Spring Cloud Gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<GatewayInstance>,
     #[doc = "Properties of the Spring Cloud Gateway Operator."]
     #[serde(rename = "operatorProperties", default, skip_serializing_if = "Option::is_none")]
@@ -2816,7 +3022,11 @@ impl GatewayResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayResourceCollection {
     #[doc = "Collection of gateway resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2876,7 +3086,11 @@ pub struct GatewayRouteConfigProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub protocol: Option<gateway_route_config_properties::Protocol>,
     #[doc = "Array of API routes, each route contains properties such as `title`, `uri`, `ssoEnabled`, `predicates`, `filters`."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<GatewayApiRoute>,
 }
 impl GatewayRouteConfigProperties {
@@ -2992,7 +3206,11 @@ impl GatewayRouteConfigResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayRouteConfigResourceCollection {
     #[doc = "Collection of Spring Cloud Gateway route config resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayRouteConfigResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3015,7 +3233,11 @@ pub struct GitPatternRepository {
     #[doc = "Name of the repository"]
     pub name: String,
     #[doc = "Collection of pattern of the repository"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern: Vec<String>,
     #[doc = "URI of the repository"]
     pub uri: String,
@@ -3023,7 +3245,12 @@ pub struct GitPatternRepository {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Searching path of the repository"]
-    #[serde(rename = "searchPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_paths: Vec<String>,
     #[doc = "Username of git repository basic auth."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3259,7 +3486,11 @@ pub mod ingress_settings {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ClientAuth {
         #[doc = "Collection of certificate resource id."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub certificates: Vec<String>,
     }
     impl ClientAuth {
@@ -3490,16 +3721,30 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Optional. If set to true, then zero will be returned for time duration where no metric is emitted/published."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
     pub fill_gap_with_zero: Option<bool>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Name of the MDM namespace. Optional."]
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
@@ -3670,7 +3915,12 @@ pub struct NetworkProfile {
     #[serde(rename = "outboundIPs", default, skip_serializing_if = "Option::is_none")]
     pub outbound_i_ps: Option<network_profile::OutboundIPs>,
     #[doc = "Required inbound or outbound traffics for Azure Spring Apps resource."]
-    #[serde(rename = "requiredTraffics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredTraffics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_traffics: Vec<RequiredTraffic>,
     #[doc = "Ingress configuration payload for Azure Spring Apps resource."]
     #[serde(rename = "ingressConfig", default, skip_serializing_if = "Option::is_none")]
@@ -3690,7 +3940,12 @@ pub mod network_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct OutboundIPs {
         #[doc = "A list of public IP addresses."]
-        #[serde(rename = "publicIPs", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "publicIPs",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub public_i_ps: Vec<String>,
     }
     impl OutboundIPs {
@@ -4009,10 +4264,18 @@ pub struct RequiredTraffic {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub port: Option<i32>,
     #[doc = "The ip list of required traffic"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ips: Vec<String>,
     #[doc = "The FQDN list of required traffic"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdns: Vec<String>,
     #[doc = "The direction of required traffic"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4115,13 +4378,26 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<SkuCapacity>,
     #[doc = "Gets the set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Gets a list of locations and availability zones in those locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "Gets the restrictions because of which SKU cannot be used. This is\r\nempty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -4147,7 +4423,11 @@ impl ResourceSkuCapabilities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuCollection {
     #[doc = "Collection of resource SKU"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceSku>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4171,10 +4451,19 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "Gets list of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Gets details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ResourceSkuZoneDetails>,
 }
 impl ResourceSkuLocationInfo {
@@ -4186,10 +4475,18 @@ impl ResourceSkuLocationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuRestrictionInfo {
     #[doc = "Gets locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Gets list of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuRestrictionInfo {
@@ -4204,7 +4501,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "Gets the value of restrictions. If the restriction type is set to\r\nlocation. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Information about the restriction where the SKU cannot be used"]
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
@@ -4299,10 +4600,18 @@ pub mod resource_sku_restrictions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuZoneDetails {
     #[doc = "Gets the set of zones that the SKU is available in with the\r\nspecified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
     #[doc = "Gets a list of capabilities that are available for the SKU in the\r\nspecified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
 }
 impl ResourceSkuZoneDetails {
@@ -4350,7 +4659,11 @@ pub struct ServiceRegistryProperties {
     #[serde(rename = "resourceRequests", default, skip_serializing_if = "Option::is_none")]
     pub resource_requests: Option<ServiceRegistryResourceRequests>,
     #[doc = "Collection of instances belong to Service Registry."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<ServiceRegistryInstance>,
 }
 impl ServiceRegistryProperties {
@@ -4422,7 +4735,11 @@ impl ServiceRegistryResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceRegistryResourceCollection {
     #[doc = "Collection of Service Registry resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceRegistryResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4478,7 +4795,11 @@ impl ServiceResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceResourceList {
     #[doc = "Collection of Service resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4499,10 +4820,20 @@ impl ServiceResourceList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -4632,7 +4963,11 @@ impl SourceUploadedUserSourceInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SsoProperties {
     #[doc = "It defines the specific actions applications can be allowed to do on a user's behalf"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scope: Vec<String>,
     #[doc = "The public identifier for the application"]
     #[serde(rename = "clientId", default, skip_serializing_if = "Option::is_none")]
@@ -4753,7 +5088,11 @@ impl StorageResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageResourceCollection {
     #[doc = "The storage resources list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageResource>,
     #[doc = "The link to next page of storage list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4800,7 +5139,11 @@ impl SupportedBuildpackResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedBuildpacksCollection {
     #[doc = "Collection of supported buildpacks resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SupportedBuildpackResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4948,7 +5291,11 @@ impl SupportedStackResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedStacksCollection {
     #[doc = "Collection of supported stacks resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SupportedStackResource>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5212,7 +5559,11 @@ pub struct ValidationMessages {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Detailed validation messages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub messages: Vec<String>,
 }
 impl ValidationMessages {
diff --git a/services/mgmt/arcdata/src/package_2021_08_01/models.rs b/services/mgmt/arcdata/src/package_2021_08_01/models.rs
index fbf58e0aa2..4e7d2f8534 100644
--- a/services/mgmt/arcdata/src/package_2021_08_01/models.rs
+++ b/services/mgmt/arcdata/src/package_2021_08_01/models.rs
@@ -175,7 +175,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -367,7 +371,11 @@ pub struct ODataError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ODataError>,
 }
 impl ODataError {
@@ -492,7 +500,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -511,7 +523,11 @@ impl OperationListResult {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageOfDataControllerResource {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataControllerResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -656,7 +672,11 @@ impl SqlManagedInstanceK8sSpec {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlManagedInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlManagedInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -812,7 +832,11 @@ impl SqlServerInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlServerInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlServerInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/arcdata/src/package_2021_11_01/models.rs b/services/mgmt/arcdata/src/package_2021_11_01/models.rs
index 5866b2bf33..9cbd29e919 100644
--- a/services/mgmt/arcdata/src/package_2021_11_01/models.rs
+++ b/services/mgmt/arcdata/src/package_2021_11_01/models.rs
@@ -152,7 +152,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -381,7 +385,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -400,7 +408,11 @@ impl OperationListResult {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageOfDataControllerResource {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataControllerResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -493,7 +505,11 @@ impl SqlManagedInstanceK8sSpec {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlManagedInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlManagedInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -682,7 +698,11 @@ impl SqlServerInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlServerInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlServerInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/arcdata/src/package_preview_2021_06_01/models.rs b/services/mgmt/arcdata/src/package_preview_2021_06_01/models.rs
index 69cff1772e..bb318c89c5 100644
--- a/services/mgmt/arcdata/src/package_preview_2021_06_01/models.rs
+++ b/services/mgmt/arcdata/src/package_preview_2021_06_01/models.rs
@@ -142,7 +142,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -295,7 +299,11 @@ pub struct ODataError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ODataError>,
 }
 impl ODataError {
@@ -420,7 +428,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -439,7 +451,11 @@ impl OperationListResult {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageOfDataControllerResource {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataControllerResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -511,7 +527,11 @@ impl PostgresInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PostgresInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PostgresInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -670,7 +690,11 @@ impl SqlManagedInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlManagedInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlManagedInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -780,7 +804,11 @@ impl SqlServerInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlServerInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlServerInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/arcdata/src/package_preview_2021_07_01/models.rs b/services/mgmt/arcdata/src/package_preview_2021_07_01/models.rs
index 32d00d314d..0104fb01ab 100644
--- a/services/mgmt/arcdata/src/package_preview_2021_07_01/models.rs
+++ b/services/mgmt/arcdata/src/package_preview_2021_07_01/models.rs
@@ -169,7 +169,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -322,7 +326,11 @@ pub struct ODataError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ODataError>,
 }
 impl ODataError {
@@ -447,7 +455,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -466,7 +478,11 @@ impl OperationListResult {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageOfDataControllerResource {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataControllerResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -538,7 +554,11 @@ impl PostgresInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PostgresInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PostgresInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -697,7 +717,11 @@ impl SqlManagedInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlManagedInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlManagedInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -847,7 +871,11 @@ impl SqlServerInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlServerInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlServerInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/arcdata/src/package_preview_2022_03/models.rs b/services/mgmt/arcdata/src/package_preview_2022_03/models.rs
index d403d4fe60..efefb34dca 100644
--- a/services/mgmt/arcdata/src/package_preview_2022_03/models.rs
+++ b/services/mgmt/arcdata/src/package_preview_2022_03/models.rs
@@ -109,7 +109,11 @@ pub mod active_directory_connector_domain_details {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActiveDirectoryConnectorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ActiveDirectoryConnectorResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -420,7 +424,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -661,7 +669,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -682,7 +694,11 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageOfDataControllerResource {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataControllerResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -727,7 +743,11 @@ impl PostgresInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PostgresInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PostgresInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -900,7 +920,11 @@ impl SqlManagedInstanceK8sSpec {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlManagedInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlManagedInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1095,7 +1119,11 @@ impl SqlServerInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlServerInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlServerInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/attestation/src/package_2018_09_01/models.rs b/services/mgmt/attestation/src/package_2018_09_01/models.rs
index 9008491c74..1a125331dd 100644
--- a/services/mgmt/attestation/src/package_2018_09_01/models.rs
+++ b/services/mgmt/attestation/src/package_2018_09_01/models.rs
@@ -24,7 +24,11 @@ impl AttestationProvider {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AttestationProviderListResult {
     #[doc = "Attestation Provider array."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AttestationProvider>,
 }
 impl AttestationProviderListResult {
@@ -152,7 +156,11 @@ pub struct JsonWebKey {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub x: Option<String>,
     #[doc = "The \"x5c\" (X.509 certificate chain) parameter contains a chain of one\nor more PKIX certificates [RFC5280].  The certificate chain is\nrepresented as a JSON array of certificate value strings.  Each\nstring in the array is a base64-encoded (Section 4 of [RFC4648] --\nnot base64url-encoded) DER [ITU.X690.1994] PKIX certificate value.\nThe PKIX certificate containing the key value MUST be the first\ncertificate."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub x5c: Vec<String>,
     #[doc = "Y coordinate for the Elliptic Curve point"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -184,7 +192,11 @@ impl JsonWebKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JsonWebKeySet {
     #[doc = "The value of the \"keys\" parameter is an array of JWK values.  By\ndefault, the order of the JWK values within the array does not imply\nan order of preference among them, although applications of JWK Sets\ncan choose to assign a meaning to the order for their purposes, if\ndesired."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<JsonWebKey>,
 }
 impl JsonWebKeySet {
@@ -196,7 +208,11 @@ impl JsonWebKeySet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of supported operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDefinition>,
 }
 impl OperationList {
diff --git a/services/mgmt/attestation/src/package_2020_10_01/models.rs b/services/mgmt/attestation/src/package_2020_10_01/models.rs
index 2fb5815a5a..294d0e3d2b 100644
--- a/services/mgmt/attestation/src/package_2020_10_01/models.rs
+++ b/services/mgmt/attestation/src/package_2020_10_01/models.rs
@@ -31,7 +31,11 @@ pub struct AttestationProviderListResult {
     #[serde(rename = "systemData", default, skip_serializing_if = "Option::is_none")]
     pub system_data: Option<SystemData>,
     #[doc = "Attestation Provider array."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AttestationProvider>,
 }
 impl AttestationProviderListResult {
@@ -162,7 +166,11 @@ pub struct JsonWebKey {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub x: Option<String>,
     #[doc = "The \"x5c\" (X.509 certificate chain) parameter contains a chain of one\nor more PKIX certificates [RFC5280].  The certificate chain is\nrepresented as a JSON array of certificate value strings.  Each\nstring in the array is a base64-encoded (Section 4 of [RFC4648] --\nnot base64url-encoded) DER [ITU.X690.1994] PKIX certificate value.\nThe PKIX certificate containing the key value MUST be the first\ncertificate."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub x5c: Vec<String>,
     #[doc = "Y coordinate for the Elliptic Curve point"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -194,7 +202,11 @@ impl JsonWebKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JsonWebKeySet {
     #[doc = "The value of the \"keys\" parameter is an array of JWK values.  By\ndefault, the order of the JWK values within the array does not imply\nan order of preference among them, although applications of JWK Sets\ncan choose to assign a meaning to the order for their purposes, if\ndesired."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<JsonWebKey>,
 }
 impl JsonWebKeySet {
@@ -209,7 +221,11 @@ pub struct OperationList {
     #[serde(rename = "systemData", default, skip_serializing_if = "Option::is_none")]
     pub system_data: Option<SystemData>,
     #[doc = "List of supported operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDefinition>,
 }
 impl OperationList {
@@ -283,7 +299,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -448,7 +468,12 @@ pub struct StatusResult {
     #[serde(rename = "attestUri", default, skip_serializing_if = "Option::is_none")]
     pub attest_uri: Option<String>,
     #[doc = "List of private endpoint connections associated with the attestation provider."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl StatusResult {
diff --git a/services/mgmt/attestation/src/package_2021_06_01/models.rs b/services/mgmt/attestation/src/package_2021_06_01/models.rs
index 0fc4c92e01..dfe2a6d357 100644
--- a/services/mgmt/attestation/src/package_2021_06_01/models.rs
+++ b/services/mgmt/attestation/src/package_2021_06_01/models.rs
@@ -31,7 +31,11 @@ pub struct AttestationProviderListResult {
     #[serde(rename = "systemData", default, skip_serializing_if = "Option::is_none")]
     pub system_data: Option<SystemData>,
     #[doc = "Attestation Provider array."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AttestationProvider>,
 }
 impl AttestationProviderListResult {
@@ -180,7 +184,11 @@ pub struct JsonWebKey {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub x: Option<String>,
     #[doc = "The \"x5c\" (X.509 certificate chain) parameter contains a chain of one\nor more PKIX certificates [RFC5280].  The certificate chain is\nrepresented as a JSON array of certificate value strings.  Each\nstring in the array is a base64-encoded (Section 4 of [RFC4648] --\nnot base64url-encoded) DER [ITU.X690.1994] PKIX certificate value.\nThe PKIX certificate containing the key value MUST be the first\ncertificate."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub x5c: Vec<String>,
     #[doc = "Y coordinate for the Elliptic Curve point"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -212,7 +220,11 @@ impl JsonWebKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JsonWebKeySet {
     #[doc = "The value of the \"keys\" parameter is an array of JWK values.  By\ndefault, the order of the JWK values within the array does not imply\nan order of preference among them, although applications of JWK Sets\ncan choose to assign a meaning to the order for their purposes, if\ndesired."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<JsonWebKey>,
 }
 impl JsonWebKeySet {
@@ -227,7 +239,11 @@ pub struct OperationList {
     #[serde(rename = "systemData", default, skip_serializing_if = "Option::is_none")]
     pub system_data: Option<SystemData>,
     #[doc = "List of supported operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDefinition>,
 }
 impl OperationList {
@@ -301,7 +317,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -435,7 +455,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -450,10 +474,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -555,7 +589,12 @@ pub struct StatusResult {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<PublicNetworkAccessType>,
     #[doc = "List of private endpoint connections associated with the attestation provider."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl StatusResult {
diff --git a/services/mgmt/authorization/src/package_2020_04_01_preview/models.rs b/services/mgmt/authorization/src/package_2020_04_01_preview/models.rs
index 9c8927e60c..f1576cf276 100644
--- a/services/mgmt/authorization/src/package_2020_04_01_preview/models.rs
+++ b/services/mgmt/authorization/src/package_2020_04_01_preview/models.rs
@@ -28,7 +28,11 @@ impl ClassicAdministrator {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClassicAdministratorListResult {
     #[doc = "An array of administrators."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClassicAdministrator>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -103,7 +107,11 @@ impl DenyAssignmentFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DenyAssignmentListResult {
     #[doc = "Deny assignment list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DenyAssignment>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -124,16 +132,35 @@ impl DenyAssignmentListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DenyAssignmentPermission {
     #[doc = "Actions to which the deny assignment does not grant access."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Actions to exclude from that the deny assignment does not grant access."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<String>,
     #[doc = "Data actions to which the deny assignment does not grant access."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<String>,
     #[doc = "Data actions to exclude from that the deny assignment does not grant access."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<String>,
 }
 impl DenyAssignmentPermission {
@@ -151,7 +178,11 @@ pub struct DenyAssignmentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "An array of permissions that are denied by the deny assignment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<DenyAssignmentPermission>,
     #[doc = "The deny assignment scope."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -160,10 +191,19 @@ pub struct DenyAssignmentProperties {
     #[serde(rename = "doNotApplyToChildScopes", default, skip_serializing_if = "Option::is_none")]
     pub do_not_apply_to_child_scopes: Option<bool>,
     #[doc = "Array of principals to which the deny assignment applies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub principals: Vec<Principal>,
     #[doc = "Array of principals to which the deny assignment does not apply."]
-    #[serde(rename = "excludePrincipals", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludePrincipals",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude_principals: Vec<Principal>,
     #[doc = "Specifies whether this deny assignment was created by Azure and cannot be edited or deleted."]
     #[serde(rename = "isSystemProtected", default, skip_serializing_if = "Option::is_none")]
@@ -202,10 +242,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -235,16 +284,35 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permission {
     #[doc = "Allowed actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Denied actions."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<String>,
     #[doc = "Allowed Data actions."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<String>,
     #[doc = "Denied Data actions."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<String>,
 }
 impl Permission {
@@ -256,7 +324,11 @@ impl Permission {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PermissionGetResult {
     #[doc = "An array of permissions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Permission>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -337,10 +409,19 @@ pub struct ProviderOperationsMetadata {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The provider resource types"]
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<ResourceType>,
     #[doc = "The provider operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<ProviderOperation>,
 }
 impl ProviderOperationsMetadata {
@@ -352,7 +433,11 @@ impl ProviderOperationsMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderOperationsMetadataListResult {
     #[doc = "The list of providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderOperationsMetadata>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -379,7 +464,11 @@ pub struct ResourceType {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The resource type operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<ProviderOperation>,
 }
 impl ResourceType {
@@ -438,7 +527,11 @@ impl RoleAssignmentFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleAssignmentListResult {
     #[doc = "Role assignment list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleAssignment>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -699,7 +792,11 @@ impl RoleDefinitionFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleDefinitionListResult {
     #[doc = "Role definition list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -729,10 +826,19 @@ pub struct RoleDefinitionProperties {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "Role definition permissions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<Permission>,
     #[doc = "Role definition assignable scopes."]
-    #[serde(rename = "assignableScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assignableScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assignable_scopes: Vec<String>,
 }
 impl RoleDefinitionProperties {
diff --git a/services/mgmt/authorization/src/package_2020_08_01_preview/models.rs b/services/mgmt/authorization/src/package_2020_08_01_preview/models.rs
index 095fef2766..fa0aee157e 100644
--- a/services/mgmt/authorization/src/package_2020_08_01_preview/models.rs
+++ b/services/mgmt/authorization/src/package_2020_08_01_preview/models.rs
@@ -28,7 +28,11 @@ impl ClassicAdministrator {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClassicAdministratorListResult {
     #[doc = "An array of administrators."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClassicAdministrator>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -103,7 +107,11 @@ impl DenyAssignmentFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DenyAssignmentListResult {
     #[doc = "Deny assignment list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DenyAssignment>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -124,16 +132,35 @@ impl DenyAssignmentListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DenyAssignmentPermission {
     #[doc = "Actions to which the deny assignment does not grant access."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Actions to exclude from that the deny assignment does not grant access."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<String>,
     #[doc = "Data actions to which the deny assignment does not grant access."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<String>,
     #[doc = "Data actions to exclude from that the deny assignment does not grant access."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<String>,
 }
 impl DenyAssignmentPermission {
@@ -151,7 +178,11 @@ pub struct DenyAssignmentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "An array of permissions that are denied by the deny assignment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<DenyAssignmentPermission>,
     #[doc = "The deny assignment scope."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -160,10 +191,19 @@ pub struct DenyAssignmentProperties {
     #[serde(rename = "doNotApplyToChildScopes", default, skip_serializing_if = "Option::is_none")]
     pub do_not_apply_to_child_scopes: Option<bool>,
     #[doc = "Array of principals to which the deny assignment applies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub principals: Vec<Principal>,
     #[doc = "Array of principals to which the deny assignment does not apply."]
-    #[serde(rename = "excludePrincipals", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludePrincipals",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude_principals: Vec<Principal>,
     #[doc = "Specifies whether this deny assignment was created by Azure and cannot be edited or deleted."]
     #[serde(rename = "isSystemProtected", default, skip_serializing_if = "Option::is_none")]
@@ -202,10 +242,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -235,16 +284,35 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permission {
     #[doc = "Allowed actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Denied actions."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<String>,
     #[doc = "Allowed Data actions."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<String>,
     #[doc = "Denied Data actions."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<String>,
 }
 impl Permission {
@@ -256,7 +324,11 @@ impl Permission {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PermissionGetResult {
     #[doc = "An array of permissions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Permission>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -337,10 +409,19 @@ pub struct ProviderOperationsMetadata {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The provider resource types"]
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<ResourceType>,
     #[doc = "The provider operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<ProviderOperation>,
 }
 impl ProviderOperationsMetadata {
@@ -352,7 +433,11 @@ impl ProviderOperationsMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderOperationsMetadataListResult {
     #[doc = "The list of providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderOperationsMetadata>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -379,7 +464,11 @@ pub struct ResourceType {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The resource type operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<ProviderOperation>,
 }
 impl ResourceType {
@@ -435,7 +524,11 @@ impl RoleAssignmentFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleAssignmentListResult {
     #[doc = "Role assignment list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleAssignment>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -620,7 +713,11 @@ impl RoleDefinitionFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleDefinitionListResult {
     #[doc = "Role definition list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -650,10 +747,19 @@ pub struct RoleDefinitionProperties {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "Role definition permissions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<Permission>,
     #[doc = "Role definition assignable scopes."]
-    #[serde(rename = "assignableScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assignableScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assignable_scopes: Vec<String>,
 }
 impl RoleDefinitionProperties {
diff --git a/services/mgmt/authorization/src/package_2020_10_01_preview/models.rs b/services/mgmt/authorization/src/package_2020_10_01_preview/models.rs
index 4f925681bc..9e492206ba 100644
--- a/services/mgmt/authorization/src/package_2020_10_01_preview/models.rs
+++ b/services/mgmt/authorization/src/package_2020_10_01_preview/models.rs
@@ -91,7 +91,11 @@ impl AccessReviewDecision {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessReviewDecisionListResult {
     #[doc = "Access Review Decision list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessReviewDecision>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -376,7 +380,11 @@ impl AccessReviewInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessReviewInstanceListResult {
     #[doc = "Access Review Instance list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessReviewInstance>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -689,7 +697,11 @@ impl AccessReviewScheduleDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessReviewScheduleDefinitionListResult {
     #[doc = "Access Review Schedule Definition list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessReviewScheduleDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -731,13 +743,21 @@ pub struct AccessReviewScheduleDefinitionProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scope: Option<AccessReviewScope>,
     #[doc = "This is the collection of reviewers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reviewers: Vec<AccessReviewReviewer>,
     #[doc = "This field specifies the type of reviewers for a review. Usually for a review, reviewers are explicitly assigned. However, in some cases, the reviewers may not be assigned and instead be chosen dynamically. For example managers review or self review."]
     #[serde(rename = "reviewersType", default, skip_serializing_if = "Option::is_none")]
     pub reviewers_type: Option<access_review_schedule_definition_properties::ReviewersType>,
     #[doc = "This is the collection of instances returned when one does an expand on it."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<AccessReviewInstance>,
 }
 impl AccessReviewScheduleDefinitionProperties {
@@ -997,7 +1017,12 @@ pub struct ApprovalSettings {
     #[serde(rename = "approvalMode", default, skip_serializing_if = "Option::is_none")]
     pub approval_mode: Option<approval_settings::ApprovalMode>,
     #[doc = "The approval stages of the request."]
-    #[serde(rename = "approvalStages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "approvalStages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub approval_stages: Vec<ApprovalStage>,
 }
 impl ApprovalSettings {
@@ -1062,13 +1087,23 @@ pub struct ApprovalStage {
     #[serde(rename = "escalationTimeInMinutes", default, skip_serializing_if = "Option::is_none")]
     pub escalation_time_in_minutes: Option<i32>,
     #[doc = "The primary approver of the request."]
-    #[serde(rename = "primaryApprovers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "primaryApprovers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub primary_approvers: Vec<UserSet>,
     #[doc = "The value determine whether escalation feature is enabled."]
     #[serde(rename = "isEscalationEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_escalation_enabled: Option<bool>,
     #[doc = "The escalation approver of the request."]
-    #[serde(rename = "escalationApprovers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "escalationApprovers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub escalation_approvers: Vec<UserSet>,
 }
 impl ApprovalStage {
@@ -1152,7 +1187,11 @@ impl DenyAssignmentFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DenyAssignmentListResult {
     #[doc = "Deny assignment list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DenyAssignment>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1173,16 +1212,35 @@ impl DenyAssignmentListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DenyAssignmentPermission {
     #[doc = "Actions to which the deny assignment does not grant access."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Actions to exclude from that the deny assignment does not grant access."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<String>,
     #[doc = "Data actions to which the deny assignment does not grant access."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<String>,
     #[doc = "Data actions to exclude from that the deny assignment does not grant access."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<String>,
 }
 impl DenyAssignmentPermission {
@@ -1200,7 +1258,11 @@ pub struct DenyAssignmentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "An array of permissions that are denied by the deny assignment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<DenyAssignmentPermission>,
     #[doc = "The deny assignment scope."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1209,10 +1271,19 @@ pub struct DenyAssignmentProperties {
     #[serde(rename = "doNotApplyToChildScopes", default, skip_serializing_if = "Option::is_none")]
     pub do_not_apply_to_child_scopes: Option<bool>,
     #[doc = "Array of principals to which the deny assignment applies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub principals: Vec<Principal>,
     #[doc = "Array of principals to which the deny assignment does not apply."]
-    #[serde(rename = "excludePrincipals", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludePrincipals",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude_principals: Vec<Principal>,
     #[doc = "Specifies whether this deny assignment was created by Azure and cannot be edited or deleted."]
     #[serde(rename = "isSystemProtected", default, skip_serializing_if = "Option::is_none")]
@@ -1245,7 +1316,11 @@ impl EligibleChildResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EligibleChildResourcesListResult {
     #[doc = "Eligible child resource list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EligibleChildResource>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1323,10 +1398,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -1475,7 +1559,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1496,16 +1584,35 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permission {
     #[doc = "Allowed actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Denied actions."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<String>,
     #[doc = "Allowed Data actions."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<String>,
     #[doc = "Denied Data actions."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<String>,
 }
 impl Permission {
@@ -1517,7 +1624,11 @@ impl Permission {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PermissionGetResult {
     #[doc = "An array of permissions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Permission>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1704,10 +1815,19 @@ pub struct ProviderOperationsMetadata {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The provider resource types"]
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<ResourceType>,
     #[doc = "The provider operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<ProviderOperation>,
 }
 impl ProviderOperationsMetadata {
@@ -1719,7 +1839,11 @@ impl ProviderOperationsMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderOperationsMetadataListResult {
     #[doc = "The list of providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderOperationsMetadata>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1746,7 +1870,11 @@ pub struct ResourceType {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The resource type operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<ProviderOperation>,
 }
 impl ResourceType {
@@ -1802,7 +1930,11 @@ impl RoleAssignmentFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleAssignmentListResult {
     #[doc = "Role assignment list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleAssignment>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2034,7 +2166,11 @@ impl RoleAssignmentScheduleInstanceFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleAssignmentScheduleInstanceListResult {
     #[doc = "Role assignment schedule instance list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleAssignmentScheduleInstance>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2317,7 +2453,11 @@ pub mod role_assignment_schedule_instance_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleAssignmentScheduleListResult {
     #[doc = "Role assignment schedule list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleAssignmentSchedule>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2635,7 +2775,11 @@ impl RoleAssignmentScheduleRequestFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleAssignmentScheduleRequestListResult {
     #[doc = "Role assignment schedule request list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleAssignmentScheduleRequest>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3048,7 +3192,11 @@ impl RoleDefinitionFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleDefinitionListResult {
     #[doc = "Role definition list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3078,10 +3226,19 @@ pub struct RoleDefinitionProperties {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "Role definition permissions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<Permission>,
     #[doc = "Role definition assignable scopes."]
-    #[serde(rename = "assignableScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assignableScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assignable_scopes: Vec<String>,
 }
 impl RoleDefinitionProperties {
@@ -3174,7 +3331,11 @@ impl RoleEligibilityScheduleInstanceFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleEligibilityScheduleInstanceListResult {
     #[doc = "Role eligibility schedule instance list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleEligibilityScheduleInstance>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3404,7 +3565,11 @@ pub mod role_eligibility_schedule_instance_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleEligibilityScheduleListResult {
     #[doc = "role eligibility schedule list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleEligibilitySchedule>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3679,7 +3844,11 @@ impl RoleEligibilityScheduleRequestFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleEligibilityScheduleRequestListResult {
     #[doc = "Role eligibility schedule request list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleEligibilityScheduleRequest>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4111,7 +4280,11 @@ impl RoleManagementPolicyAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleManagementPolicyAssignmentListResult {
     #[doc = "Role management policy assignment list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleManagementPolicyAssignment>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4175,7 +4348,12 @@ pub struct RoleManagementPolicyEnablementRule {
     #[serde(flatten)]
     pub role_management_policy_rule: RoleManagementPolicyRule,
     #[doc = "The list of enabled rules."]
-    #[serde(rename = "enabledRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_rules: Vec<String>,
 }
 impl RoleManagementPolicyEnablementRule {
@@ -4211,7 +4389,11 @@ impl RoleManagementPolicyExpirationRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleManagementPolicyListResult {
     #[doc = "Role management policy list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleManagementPolicy>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4243,7 +4425,12 @@ pub struct RoleManagementPolicyNotificationRule {
     #[serde(rename = "recipientType", default, skip_serializing_if = "Option::is_none")]
     pub recipient_type: Option<role_management_policy_notification_rule::RecipientType>,
     #[doc = "The list notification recipients."]
-    #[serde(rename = "notificationRecipients", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationRecipients",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_recipients: Vec<String>,
     #[doc = "Its value determine if the notification need to be sent to the recipient type specified in policy rule."]
     #[serde(rename = "isDefaultRecipientsEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -4399,10 +4586,19 @@ pub struct RoleManagementPolicyProperties {
     #[serde(rename = "lastModifiedDateTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_modified_date_time: Option<time::OffsetDateTime>,
     #[doc = "The rule applied to the policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<RoleManagementPolicyRule>,
     #[doc = "The readonly computed rule applied to the policy."]
-    #[serde(rename = "effectiveRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_rules: Vec<RoleManagementPolicyRule>,
     #[serde(rename = "policyProperties", default, skip_serializing_if = "Option::is_none")]
     pub policy_properties: Option<PolicyProperties>,
@@ -4441,19 +4637,38 @@ pub struct RoleManagementPolicyRuleTarget {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub caller: Option<String>,
     #[doc = "The type of operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<String>,
     #[doc = "The assignment level to which it is applied."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub level: Option<String>,
     #[doc = "The list of target objects."]
-    #[serde(rename = "targetObjects", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetObjects",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_objects: Vec<String>,
     #[doc = "The list of inheritable settings."]
-    #[serde(rename = "inheritableSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inheritableSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inheritable_settings: Vec<String>,
     #[doc = "The list of enforced settings."]
-    #[serde(rename = "enforcedSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enforcedSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enforced_settings: Vec<String>,
 }
 impl RoleManagementPolicyRuleTarget {
diff --git a/services/mgmt/authorization/src/package_2022_04_01/models.rs b/services/mgmt/authorization/src/package_2022_04_01/models.rs
index 1a9867c8fd..001367446b 100644
--- a/services/mgmt/authorization/src/package_2022_04_01/models.rs
+++ b/services/mgmt/authorization/src/package_2022_04_01/models.rs
@@ -19,7 +19,12 @@ pub struct ApprovalSettings {
     #[serde(rename = "approvalMode", default, skip_serializing_if = "Option::is_none")]
     pub approval_mode: Option<approval_settings::ApprovalMode>,
     #[doc = "The approval stages of the request."]
-    #[serde(rename = "approvalStages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "approvalStages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub approval_stages: Vec<ApprovalStage>,
 }
 impl ApprovalSettings {
@@ -84,13 +89,23 @@ pub struct ApprovalStage {
     #[serde(rename = "escalationTimeInMinutes", default, skip_serializing_if = "Option::is_none")]
     pub escalation_time_in_minutes: Option<i32>,
     #[doc = "The primary approver of the request."]
-    #[serde(rename = "primaryApprovers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "primaryApprovers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub primary_approvers: Vec<UserSet>,
     #[doc = "The value determine whether escalation feature is enabled."]
     #[serde(rename = "isEscalationEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_escalation_enabled: Option<bool>,
     #[doc = "The escalation approver of the request."]
-    #[serde(rename = "escalationApprovers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "escalationApprovers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub escalation_approvers: Vec<UserSet>,
 }
 impl ApprovalStage {
@@ -123,7 +138,11 @@ impl ClassicAdministrator {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClassicAdministratorListResult {
     #[doc = "An array of administrators."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClassicAdministrator>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -231,7 +250,11 @@ impl DenyAssignmentFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DenyAssignmentListResult {
     #[doc = "Deny assignment list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DenyAssignment>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -252,16 +275,35 @@ impl DenyAssignmentListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DenyAssignmentPermission {
     #[doc = "Actions to which the deny assignment does not grant access."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Actions to exclude from that the deny assignment does not grant access."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<String>,
     #[doc = "Data actions to which the deny assignment does not grant access."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<String>,
     #[doc = "Data actions to exclude from that the deny assignment does not grant access."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<String>,
     #[doc = "The conditions on the Deny assignment permission. This limits the resources it applies to."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -285,7 +327,11 @@ pub struct DenyAssignmentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "An array of permissions that are denied by the deny assignment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<DenyAssignmentPermission>,
     #[doc = "The deny assignment scope."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -294,10 +340,19 @@ pub struct DenyAssignmentProperties {
     #[serde(rename = "doNotApplyToChildScopes", default, skip_serializing_if = "Option::is_none")]
     pub do_not_apply_to_child_scopes: Option<bool>,
     #[doc = "Array of principals to which the deny assignment applies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub principals: Vec<Principal>,
     #[doc = "Array of principals to which the deny assignment does not apply."]
-    #[serde(rename = "excludePrincipals", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludePrincipals",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude_principals: Vec<Principal>,
     #[doc = "Specifies whether this deny assignment was created by Azure and cannot be edited or deleted."]
     #[serde(rename = "isSystemProtected", default, skip_serializing_if = "Option::is_none")]
@@ -330,7 +385,11 @@ impl EligibleChildResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EligibleChildResourcesListResult {
     #[doc = "Eligible child resource list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EligibleChildResource>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -375,10 +434,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -485,16 +553,35 @@ pub mod expanded_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permission {
     #[doc = "Allowed actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Denied actions."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<String>,
     #[doc = "Allowed Data actions."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<String>,
     #[doc = "Denied Data actions."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<String>,
 }
 impl Permission {
@@ -506,7 +593,11 @@ impl Permission {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PermissionGetResult {
     #[doc = "An array of permissions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Permission>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -695,10 +786,19 @@ pub struct ProviderOperationsMetadata {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The provider resource types"]
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<ResourceType>,
     #[doc = "The provider operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<ProviderOperation>,
 }
 impl ProviderOperationsMetadata {
@@ -710,7 +810,11 @@ impl ProviderOperationsMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderOperationsMetadataListResult {
     #[doc = "The list of providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderOperationsMetadata>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -737,7 +841,11 @@ pub struct ResourceType {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The resource type operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<ProviderOperation>,
 }
 impl ResourceType {
@@ -793,7 +901,11 @@ impl RoleAssignmentFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleAssignmentListResult {
     #[doc = "Role assignment list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleAssignment>,
     #[doc = "The skipToken to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1004,7 +1116,11 @@ impl RoleAssignmentScheduleInstanceFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleAssignmentScheduleInstanceListResult {
     #[doc = "Role assignment schedule instance list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleAssignmentScheduleInstance>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1287,7 +1403,11 @@ pub mod role_assignment_schedule_instance_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleAssignmentScheduleListResult {
     #[doc = "Role assignment schedule list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleAssignmentSchedule>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1605,7 +1725,11 @@ impl RoleAssignmentScheduleRequestFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleAssignmentScheduleRequestListResult {
     #[doc = "Role assignment schedule request list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleAssignmentScheduleRequest>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2018,7 +2142,11 @@ impl RoleDefinitionFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleDefinitionListResult {
     #[doc = "Role definition list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2048,10 +2176,19 @@ pub struct RoleDefinitionProperties {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "Role definition permissions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<Permission>,
     #[doc = "Role definition assignable scopes."]
-    #[serde(rename = "assignableScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assignableScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assignable_scopes: Vec<String>,
 }
 impl RoleDefinitionProperties {
@@ -2144,7 +2281,11 @@ impl RoleEligibilityScheduleInstanceFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleEligibilityScheduleInstanceListResult {
     #[doc = "Role eligibility schedule instance list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleEligibilityScheduleInstance>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2374,7 +2515,11 @@ pub mod role_eligibility_schedule_instance_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleEligibilityScheduleListResult {
     #[doc = "role eligibility schedule list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleEligibilitySchedule>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2649,7 +2794,11 @@ impl RoleEligibilityScheduleRequestFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleEligibilityScheduleRequestListResult {
     #[doc = "Role eligibility schedule request list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleEligibilityScheduleRequest>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3082,7 +3231,11 @@ impl RoleManagementPolicyAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleManagementPolicyAssignmentListResult {
     #[doc = "Role management policy assignment list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleManagementPolicyAssignment>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3112,7 +3265,12 @@ pub struct RoleManagementPolicyAssignmentProperties {
     #[serde(rename = "policyId", default, skip_serializing_if = "Option::is_none")]
     pub policy_id: Option<String>,
     #[doc = "The readonly computed rule applied to the policy."]
-    #[serde(rename = "effectiveRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_rules: Vec<RoleManagementPolicyRule>,
     #[doc = "Expanded info of resource scope, role definition and policy"]
     #[serde(rename = "policyAssignmentProperties", default, skip_serializing_if = "Option::is_none")]
@@ -3150,7 +3308,12 @@ pub struct RoleManagementPolicyEnablementRule {
     #[serde(flatten)]
     pub role_management_policy_rule: RoleManagementPolicyRule,
     #[doc = "The list of enabled rules."]
-    #[serde(rename = "enabledRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_rules: Vec<String>,
 }
 impl RoleManagementPolicyEnablementRule {
@@ -3186,7 +3349,11 @@ impl RoleManagementPolicyExpirationRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleManagementPolicyListResult {
     #[doc = "Role management policy list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleManagementPolicy>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3218,7 +3385,12 @@ pub struct RoleManagementPolicyNotificationRule {
     #[serde(rename = "recipientType", default, skip_serializing_if = "Option::is_none")]
     pub recipient_type: Option<role_management_policy_notification_rule::RecipientType>,
     #[doc = "The list of notification recipients."]
-    #[serde(rename = "notificationRecipients", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationRecipients",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_recipients: Vec<String>,
     #[doc = "Determines if the notification will be sent to the recipient type specified in the policy rule."]
     #[serde(rename = "isDefaultRecipientsEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -3374,10 +3546,19 @@ pub struct RoleManagementPolicyProperties {
     #[serde(rename = "lastModifiedDateTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_modified_date_time: Option<time::OffsetDateTime>,
     #[doc = "The rule applied to the policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<RoleManagementPolicyRule>,
     #[doc = "The readonly computed rule applied to the policy."]
-    #[serde(rename = "effectiveRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_rules: Vec<RoleManagementPolicyRule>,
     #[doc = "Expanded info of resource scope"]
     #[serde(rename = "policyProperties", default, skip_serializing_if = "Option::is_none")]
@@ -3417,19 +3598,38 @@ pub struct RoleManagementPolicyRuleTarget {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub caller: Option<String>,
     #[doc = "The type of operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<String>,
     #[doc = "The assignment level to which rule is applied."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub level: Option<String>,
     #[doc = "The list of target objects."]
-    #[serde(rename = "targetObjects", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetObjects",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_objects: Vec<String>,
     #[doc = "The list of inheritable settings."]
-    #[serde(rename = "inheritableSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inheritableSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inheritable_settings: Vec<String>,
     #[doc = "The list of enforced settings."]
-    #[serde(rename = "enforcedSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enforcedSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enforced_settings: Vec<String>,
 }
 impl RoleManagementPolicyRuleTarget {
diff --git a/services/mgmt/authorization/src/package_preview_2021_11/models.rs b/services/mgmt/authorization/src/package_preview_2021_11/models.rs
index f82bcd4f30..8667ac6fa4 100644
--- a/services/mgmt/authorization/src/package_preview_2021_11/models.rs
+++ b/services/mgmt/authorization/src/package_preview_2021_11/models.rs
@@ -91,7 +91,11 @@ impl AccessReviewContactedReviewer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessReviewContactedReviewerListResult {
     #[doc = "Access Review Contacted Reviewer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessReviewContactedReviewer>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -215,7 +219,11 @@ pub mod access_review_decision_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessReviewDecisionListResult {
     #[doc = "Access Review Decision list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessReviewDecision>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -561,7 +569,11 @@ impl AccessReviewHistoryDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessReviewHistoryDefinitionInstanceListResult {
     #[doc = "Access Review History Definition's Instance list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessReviewHistoryInstance>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -582,7 +594,11 @@ impl AccessReviewHistoryDefinitionInstanceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessReviewHistoryDefinitionListResult {
     #[doc = "Access Review History Definition list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessReviewHistoryDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -612,7 +628,11 @@ pub struct AccessReviewHistoryDefinitionProperties {
     #[serde(rename = "reviewHistoryPeriodEndDateTime", default, with = "azure_core::date::rfc3339::option")]
     pub review_history_period_end_date_time: Option<time::OffsetDateTime>,
     #[doc = "Collection of review decisions which the history data should be filtered on. For example if Approve and Deny are supplied the data will only contain review results in which the decision maker approved or denied a review request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub decisions: Vec<String>,
     #[doc = "This read-only field specifies the of the requested review history data. This is either requested, in-progress, done or error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -624,13 +644,21 @@ pub struct AccessReviewHistoryDefinitionProperties {
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
     pub created_by: Option<AccessReviewActorIdentity>,
     #[doc = "A collection of scopes used when selecting review history data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<AccessReviewScope>,
     #[doc = "Recurrence settings of an Access Review History Definition."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub settings: Option<AccessReviewHistoryScheduleSettings>,
     #[doc = "Set of access review history instances for this history definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<AccessReviewHistoryInstance>,
 }
 impl AccessReviewHistoryDefinitionProperties {
@@ -820,7 +848,11 @@ impl AccessReviewInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessReviewInstanceListResult {
     #[doc = "Access Review Instance list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessReviewInstance>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -850,10 +882,19 @@ pub struct AccessReviewInstanceProperties {
     #[serde(rename = "endDateTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_date_time: Option<time::OffsetDateTime>,
     #[doc = "This is the collection of reviewers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reviewers: Vec<AccessReviewReviewer>,
     #[doc = "This is the collection of backup reviewers."]
-    #[serde(rename = "backupReviewers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupReviewers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_reviewers: Vec<AccessReviewReviewer>,
     #[doc = "This field specifies the type of reviewers for a review. Usually for a review, reviewers are explicitly assigned. However, in some cases, the reviewers may not be assigned and instead be chosen dynamically. For example managers review or self review."]
     #[serde(rename = "reviewersType", default, skip_serializing_if = "Option::is_none")]
@@ -1182,7 +1223,11 @@ impl AccessReviewScheduleDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessReviewScheduleDefinitionListResult {
     #[doc = "Access Review Schedule Definition list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessReviewScheduleDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1224,16 +1269,29 @@ pub struct AccessReviewScheduleDefinitionProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scope: Option<AccessReviewScope>,
     #[doc = "This is the collection of reviewers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reviewers: Vec<AccessReviewReviewer>,
     #[doc = "This is the collection of backup reviewers."]
-    #[serde(rename = "backupReviewers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupReviewers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_reviewers: Vec<AccessReviewReviewer>,
     #[doc = "This field specifies the type of reviewers for a review. Usually for a review, reviewers are explicitly assigned. However, in some cases, the reviewers may not be assigned and instead be chosen dynamically. For example managers review or self review."]
     #[serde(rename = "reviewersType", default, skip_serializing_if = "Option::is_none")]
     pub reviewers_type: Option<access_review_schedule_definition_properties::ReviewersType>,
     #[doc = "This is the collection of instances returned when one does an expand on it."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<AccessReviewInstance>,
 }
 impl AccessReviewScheduleDefinitionProperties {
@@ -1616,7 +1674,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/automanage/src/package_2020_06_30_preview/models.rs b/services/mgmt/automanage/src/package_2020_06_30_preview/models.rs
index 3f5c793d8a..1be6c0fdd1 100644
--- a/services/mgmt/automanage/src/package_2020_06_30_preview/models.rs
+++ b/services/mgmt/automanage/src/package_2020_06_30_preview/models.rs
@@ -51,7 +51,11 @@ pub mod account_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountList {
     #[doc = "Result of the list Account operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
 }
 impl azure_core::Continuable for AccountList {
@@ -151,7 +155,11 @@ pub mod configuration_profile_assignment_compliance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationProfileAssignmentList {
     #[doc = "Result of the list configuration profile assignment operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationProfileAssignment>,
 }
 impl azure_core::Continuable for ConfigurationProfileAssignmentList {
@@ -439,7 +447,11 @@ pub mod configuration_profile_preference_anti_malware {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationProfilePreferenceList {
     #[doc = "Result of the list ConfigurationProfilePreference operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationProfilePreference>,
 }
 impl azure_core::Continuable for ConfigurationProfilePreferenceList {
@@ -531,10 +543,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -621,7 +642,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of Automanage operations supported by the Automanage resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationList {
diff --git a/services/mgmt/automanage/src/package_2021_04_30_preview/models.rs b/services/mgmt/automanage/src/package_2021_04_30_preview/models.rs
index 4512ba4af6..ddd85fd0eb 100644
--- a/services/mgmt/automanage/src/package_2021_04_30_preview/models.rs
+++ b/services/mgmt/automanage/src/package_2021_04_30_preview/models.rs
@@ -28,7 +28,11 @@ pub struct AssignmentReportProperties {
     #[serde(rename = "configurationProfile", default, skip_serializing_if = "Option::is_none")]
     pub configuration_profile: Option<String>,
     #[doc = "List of resources processed by the configuration profile assignment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<ReportResource>,
     #[doc = "The error detail."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -70,7 +74,11 @@ impl BestPractice {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BestPracticeList {
     #[doc = "Result of the list best practice operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BestPractice>,
 }
 impl azure_core::Continuable for BestPracticeList {
@@ -134,7 +142,11 @@ impl ConfigurationProfileAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationProfileAssignmentList {
     #[doc = "Result of the list configuration profile assignment operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationProfileAssignment>,
 }
 impl azure_core::Continuable for ConfigurationProfileAssignmentList {
@@ -181,7 +193,11 @@ impl ConfigurationProfileAssignmentProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationProfileList {
     #[doc = "Result of the list ConfigurationProfile operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationProfile>,
 }
 impl azure_core::Continuable for ConfigurationProfileList {
@@ -252,10 +268,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -410,7 +435,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -460,7 +489,11 @@ impl Report {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReportList {
     #[doc = "Result of the list report operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Report>,
 }
 impl azure_core::Continuable for ReportList {
@@ -537,7 +570,11 @@ impl ServicePrincipal {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServicePrincipalListResult {
     #[doc = "The list of servicePrincipals."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServicePrincipal>,
 }
 impl azure_core::Continuable for ServicePrincipalListResult {
diff --git a/services/mgmt/automanage/src/package_2022_05/models.rs b/services/mgmt/automanage/src/package_2022_05/models.rs
index 697fb9b8ef..33b8ba6874 100644
--- a/services/mgmt/automanage/src/package_2022_05/models.rs
+++ b/services/mgmt/automanage/src/package_2022_05/models.rs
@@ -28,7 +28,11 @@ pub struct AssignmentReportProperties {
     #[serde(rename = "configurationProfile", default, skip_serializing_if = "Option::is_none")]
     pub configuration_profile: Option<String>,
     #[doc = "List of resources processed by the configuration profile assignment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<ReportResource>,
     #[doc = "The error detail."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -70,7 +74,11 @@ impl BestPractice {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BestPracticeList {
     #[doc = "Result of the list best practice operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BestPractice>,
 }
 impl azure_core::Continuable for BestPracticeList {
@@ -137,7 +145,11 @@ impl ConfigurationProfileAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationProfileAssignmentList {
     #[doc = "Result of the list configuration profile assignment operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationProfileAssignment>,
 }
 impl azure_core::Continuable for ConfigurationProfileAssignmentList {
@@ -173,7 +185,11 @@ impl ConfigurationProfileAssignmentProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationProfileList {
     #[doc = "Result of the list ConfigurationProfile operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationProfile>,
 }
 impl azure_core::Continuable for ConfigurationProfileList {
@@ -241,10 +257,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -400,7 +425,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -449,7 +478,11 @@ impl Report {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReportList {
     #[doc = "Result of the list report operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Report>,
 }
 impl azure_core::Continuable for ReportList {
@@ -526,7 +559,11 @@ impl ServicePrincipal {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServicePrincipalListResult {
     #[doc = "The list of servicePrincipals."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServicePrincipal>,
 }
 impl azure_core::Continuable for ServicePrincipalListResult {
diff --git a/services/mgmt/automation/src/package_2019_06/models.rs b/services/mgmt/automation/src/package_2019_06/models.rs
index 4182fa9c8e..b82b41a40b 100644
--- a/services/mgmt/automation/src/package_2019_06/models.rs
+++ b/services/mgmt/automation/src/package_2019_06/models.rs
@@ -25,7 +25,11 @@ impl Activity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActivityListResult {
     #[doc = "Gets or sets a list of activities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Activity>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -88,7 +92,12 @@ pub struct ActivityParameter {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Gets or sets the validation set of activity parameter."]
-    #[serde(rename = "validationSet", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationSet",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_set: Vec<ActivityParameterValidationSet>,
 }
 impl ActivityParameter {
@@ -103,7 +112,11 @@ pub struct ActivityParameterSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Gets or sets the parameters of the activity parameter set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ActivityParameter>,
 }
 impl ActivityParameterSet {
@@ -130,10 +143,20 @@ pub struct ActivityProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub definition: Option<String>,
     #[doc = "Gets or sets the parameter sets of the activity."]
-    #[serde(rename = "parameterSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parameterSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameter_sets: Vec<ActivityParameterSet>,
     #[doc = "Gets or sets the output types of the activity."]
-    #[serde(rename = "outputTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_types: Vec<ActivityOutputType>,
     #[doc = "Gets or sets the creation time."]
     #[serde(rename = "creationTime", default, with = "azure_core::date::rfc3339::option")]
@@ -154,13 +177,28 @@ impl ActivityProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdvancedSchedule {
     #[doc = "Days of the week that the job should execute on."]
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<String>,
     #[doc = "Days of the month that the job should execute on. Must be between 1 and 31."]
-    #[serde(rename = "monthDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub month_days: Vec<i32>,
     #[doc = "Occurrences of days within a month."]
-    #[serde(rename = "monthlyOccurrences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthlyOccurrences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monthly_occurrences: Vec<AdvancedScheduleMonthlyOccurrence>,
 }
 impl AdvancedSchedule {
@@ -377,7 +415,11 @@ impl AutomationAccountCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AutomationAccountListResult {
     #[doc = "Gets or sets list of accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AutomationAccount>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -500,10 +542,18 @@ impl AutomationAccountUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureQueryProperties {
     #[doc = "List of Subscription or Resource Group ARM Ids."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scope: Vec<String>,
     #[doc = "List of locations to scope the query to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Tag filter information for the VM."]
     #[serde(rename = "tagSettings", default, skip_serializing_if = "Option::is_none")]
@@ -571,7 +621,11 @@ impl CertificateCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListResult {
     #[doc = "Gets or sets a list of certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Certificate>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -695,7 +749,11 @@ impl ConnectionCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionListResult {
     #[doc = "Gets or sets a list of connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Connection>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -804,7 +862,11 @@ impl ConnectionTypeCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionTypeListResult {
     #[doc = "Gets or sets a list of connection types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectionType>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1021,7 +1083,11 @@ impl CredentialCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CredentialListResult {
     #[doc = "Gets or sets a list of credentials."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Credential>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1156,7 +1222,11 @@ impl DscCompilationJobCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscCompilationJobListResult {
     #[doc = "Gets or sets a list of Dsc Compilation jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscCompilationJob>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1373,7 +1443,11 @@ impl DscConfigurationCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscConfigurationListResult {
     #[doc = "Gets or sets a list of configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscConfiguration>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1630,7 +1704,11 @@ impl DscNodeConfigurationCreateOrUpdateParametersProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscNodeConfigurationListResult {
     #[doc = "Gets or sets a list of Dsc node configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscNodeConfiguration>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1696,7 +1774,11 @@ impl DscNodeExtensionHandlerAssociationProperty {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscNodeListResult {
     #[doc = "Gets or sets a list of dsc nodes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscNode>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1747,7 +1829,12 @@ pub struct DscNodeProperties {
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
     pub total_count: Option<i64>,
     #[doc = "Gets or sets the list of extensionHandler properties for a Node."]
-    #[serde(rename = "extensionHandler", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extensionHandler",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extension_handler: Vec<DscNodeExtensionHandlerAssociationProperty>,
 }
 impl DscNodeProperties {
@@ -1792,10 +1879,18 @@ pub struct DscNodeReport {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Gets or sets the errors for the node report."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<DscReportError>,
     #[doc = "Gets or sets the resource for the node report."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<DscReportResource>,
     #[doc = "Definition of the DSC Meta Configuration."]
     #[serde(rename = "metaConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -1804,10 +1899,20 @@ pub struct DscNodeReport {
     #[serde(rename = "hostName", default, skip_serializing_if = "Option::is_none")]
     pub host_name: Option<String>,
     #[doc = "Gets or sets the IPv4 address of the node that sent the report."]
-    #[serde(rename = "iPV4Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "iPV4Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub i_pv4_addresses: Vec<String>,
     #[doc = "Gets or sets the IPv6 address of the node that sent the report."]
-    #[serde(rename = "iPV6Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "iPV6Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub i_pv6_addresses: Vec<String>,
     #[doc = "Gets or sets the number of resource in the node report."]
     #[serde(rename = "numberOfResources", default, skip_serializing_if = "Option::is_none")]
@@ -1825,7 +1930,11 @@ impl DscNodeReport {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscNodeReportListResult {
     #[doc = "Gets or sets a list of dsc node reports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscNodeReport>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1907,7 +2016,12 @@ pub struct DscReportResource {
     #[serde(rename = "sourceInfo", default, skip_serializing_if = "Option::is_none")]
     pub source_info: Option<String>,
     #[doc = "Gets or sets the Resource Navigation values for resources the resource depends on."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<DscReportResourceNavigation>,
     #[doc = "Gets or sets the module name of the resource."]
     #[serde(rename = "moduleName", default, skip_serializing_if = "Option::is_none")]
@@ -2022,7 +2136,12 @@ pub struct HybridRunbookWorkerGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Gets or sets the list of hybrid runbook workers."]
-    #[serde(rename = "hybridRunbookWorkers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hybridRunbookWorkers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hybrid_runbook_workers: Vec<HybridRunbookWorker>,
     #[doc = "Definition of RunAs credential to use for hybrid worker."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2092,7 +2211,11 @@ impl HybridRunbookWorkerGroupUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HybridRunbookWorkerGroupsListResult {
     #[doc = "Gets or sets a list of hybrid runbook worker groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HybridRunbookWorkerGroup>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2268,7 +2391,11 @@ impl JobCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobListResultV2 {
     #[doc = "List of jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobCollectionItem>,
     #[doc = "The  link to the next page."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2499,7 +2626,11 @@ impl JobScheduleCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobScheduleListResult {
     #[doc = "Gets or sets a list of job schedules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobSchedule>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2559,7 +2690,11 @@ impl JobStream {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobStreamListResult {
     #[doc = "A list of job streams."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobStream>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2751,7 +2886,11 @@ pub mod key {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyListResult {
     #[doc = "Lists the automation keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<Key>,
 }
 impl KeyListResult {
@@ -2778,10 +2917,20 @@ pub struct LinuxProperties {
     #[serde(rename = "includedPackageClassifications", default, skip_serializing_if = "Option::is_none")]
     pub included_package_classifications: Option<linux_properties::IncludedPackageClassifications>,
     #[doc = "packages excluded from the software update configuration."]
-    #[serde(rename = "excludedPackageNameMasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPackageNameMasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_package_name_masks: Vec<String>,
     #[doc = "packages included from the software update configuration."]
-    #[serde(rename = "includedPackageNameMasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedPackageNameMasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_package_name_masks: Vec<String>,
     #[doc = "Reboot setting for the software update configuration."]
     #[serde(rename = "rebootSetting", default, skip_serializing_if = "Option::is_none")]
@@ -2909,7 +3058,11 @@ impl ModuleErrorInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ModuleListResult {
     #[doc = "Gets or sets a list of modules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Module>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3053,7 +3206,11 @@ impl NodeCountProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeCounts {
     #[doc = "Gets an array of counts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeCount>,
     #[doc = "Gets the total number of records matching countType criteria."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -3119,7 +3276,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Automation operations supported by the Automation resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -3469,7 +3630,12 @@ pub struct RunbookDraft {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<serde_json::Value>,
     #[doc = "Gets or sets the runbook output types."]
-    #[serde(rename = "outputTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_types: Vec<String>,
 }
 impl RunbookDraft {
@@ -3626,7 +3792,11 @@ pub mod runbook_draft_undo_edit_result {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunbookListResult {
     #[doc = "Gets or sets a list of runbooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Runbook>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3692,7 +3862,12 @@ pub struct RunbookProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<serde_json::Value>,
     #[doc = "Gets or sets the runbook output types."]
-    #[serde(rename = "outputTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_types: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub draft: Option<RunbookDraft>,
@@ -3986,7 +4161,11 @@ impl ScheduleCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScheduleListResult {
     #[doc = "Gets or sets a list of schedules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Schedule>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4248,7 +4427,11 @@ pub mod source_control_create_or_update_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlListResult {
     #[doc = "The list of source controls."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControl>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4572,7 +4755,11 @@ impl SourceControlSyncJobCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlSyncJobListResult {
     #[doc = "The list of source control sync jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControlSyncJob>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4857,7 +5044,11 @@ pub mod source_control_sync_job_stream_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlSyncJobStreamsListBySyncJob {
     #[doc = "The list of source control sync job streams."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControlSyncJobStream>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4940,7 +5131,11 @@ impl Statistics {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StatisticsListResult {
     #[doc = "Gets or sets a list of statistics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Statistics>,
 }
 impl azure_core::Continuable for StatisticsListResult {
@@ -4982,10 +5177,20 @@ pub mod tag_settings_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TargetProperties {
     #[doc = "List of Azure queries in the software update configuration."]
-    #[serde(rename = "azureQueries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureQueries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_queries: Vec<AzureQueryProperties>,
     #[doc = "List of non Azure queries in the software update configuration."]
-    #[serde(rename = "nonAzureQueries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nonAzureQueries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub non_azure_queries: Vec<NonAzureQueryProperties>,
 }
 impl TargetProperties {
@@ -5086,7 +5291,11 @@ impl TypeField {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TypeFieldListResult {
     #[doc = "Gets or sets a list of fields."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TypeField>,
 }
 impl azure_core::Continuable for TypeFieldListResult {
@@ -5146,7 +5355,11 @@ impl UsageCounterName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "Gets or sets usage."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResult {
@@ -5209,7 +5422,11 @@ impl VariableCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VariableListResult {
     #[doc = "Gets or sets a list of variables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Variable>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5307,7 +5524,11 @@ impl Watcher {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WatcherListResult {
     #[doc = "Gets or sets a list of watchers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Watcher>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5444,7 +5665,11 @@ impl WebhookCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebhookListResult {
     #[doc = "Gets or sets a list of webhooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Webhook>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5546,10 +5771,20 @@ pub struct WindowsProperties {
     #[serde(rename = "includedUpdateClassifications", default, skip_serializing_if = "Option::is_none")]
     pub included_update_classifications: Option<windows_properties::IncludedUpdateClassifications>,
     #[doc = "KB numbers excluded from the software update configuration."]
-    #[serde(rename = "excludedKbNumbers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedKbNumbers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_kb_numbers: Vec<String>,
     #[doc = "KB numbers included from the software update configuration."]
-    #[serde(rename = "includedKbNumbers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedKbNumbers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_kb_numbers: Vec<String>,
     #[doc = "Reboot setting for the software update configuration."]
     #[serde(rename = "rebootSetting", default, skip_serializing_if = "Option::is_none")]
@@ -5760,7 +5995,11 @@ impl SoftwareUpdateConfigurationCollectionItemProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationListResult {
     #[doc = "outer object returned when listing all software update configurations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SoftwareUpdateConfigurationCollectionItem>,
 }
 impl SoftwareUpdateConfigurationListResult {
@@ -5790,7 +6029,11 @@ impl SoftwareUpdateConfigurationMachineRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationMachineRunListResult {
     #[doc = "outer object returned when listing all software update configuration machine runs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SoftwareUpdateConfigurationMachineRun>,
     #[doc = "link to next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5869,7 +6112,11 @@ impl SoftwareUpdateConfigurationRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationRunListResult {
     #[doc = "outer object returned when listing all software update configuration runs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SoftwareUpdateConfigurationRun>,
     #[doc = "link to next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6007,10 +6254,20 @@ pub struct UpdateConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "List of azure resource Ids for azure virtual machines targeted by the software update configuration."]
-    #[serde(rename = "azureVirtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureVirtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_virtual_machines: Vec<String>,
     #[doc = "List of names of non-azure machines targeted by the software update configuration."]
-    #[serde(rename = "nonAzureComputerNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nonAzureComputerNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub non_azure_computer_names: Vec<String>,
     #[doc = "Group specific to the update configuration."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/automation/src/package_2020_01_13_preview/models.rs b/services/mgmt/automation/src/package_2020_01_13_preview/models.rs
index 8bdde38d71..9d33757194 100644
--- a/services/mgmt/automation/src/package_2020_01_13_preview/models.rs
+++ b/services/mgmt/automation/src/package_2020_01_13_preview/models.rs
@@ -25,7 +25,11 @@ impl Activity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActivityListResult {
     #[doc = "Gets or sets a list of activities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Activity>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -88,7 +92,12 @@ pub struct ActivityParameter {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Gets or sets the validation set of activity parameter."]
-    #[serde(rename = "validationSet", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationSet",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_set: Vec<ActivityParameterValidationSet>,
 }
 impl ActivityParameter {
@@ -103,7 +112,11 @@ pub struct ActivityParameterSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Gets or sets the parameters of the activity parameter set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ActivityParameter>,
 }
 impl ActivityParameterSet {
@@ -130,10 +143,20 @@ pub struct ActivityProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub definition: Option<String>,
     #[doc = "Gets or sets the parameter sets of the activity."]
-    #[serde(rename = "parameterSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parameterSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameter_sets: Vec<ActivityParameterSet>,
     #[doc = "Gets or sets the output types of the activity."]
-    #[serde(rename = "outputTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_types: Vec<ActivityOutputType>,
     #[doc = "Gets or sets the creation time."]
     #[serde(rename = "creationTime", default, with = "azure_core::date::rfc3339::option")]
@@ -154,13 +177,28 @@ impl ActivityProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdvancedSchedule {
     #[doc = "Days of the week that the job should execute on."]
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<String>,
     #[doc = "Days of the month that the job should execute on. Must be between 1 and 31."]
-    #[serde(rename = "monthDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub month_days: Vec<i32>,
     #[doc = "Occurrences of days within a month."]
-    #[serde(rename = "monthlyOccurrences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthlyOccurrences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monthly_occurrences: Vec<AdvancedScheduleMonthlyOccurrence>,
 }
 impl AdvancedSchedule {
@@ -389,7 +427,11 @@ impl AutomationAccountCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AutomationAccountListResult {
     #[doc = "Gets or sets list of accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AutomationAccount>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -431,7 +473,12 @@ pub struct AutomationAccountProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionProperties>,
     #[doc = "List of Automation operations supported by the Automation resource provider."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Indicates whether traffic on the non-ARM endpoint (Webhook/Agent) is allowed from the public internet"]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -530,10 +577,18 @@ impl AutomationAccountUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureQueryProperties {
     #[doc = "List of Subscription or Resource Group ARM Ids."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scope: Vec<String>,
     #[doc = "List of locations to scope the query to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Tag filter information for the VM."]
     #[serde(rename = "tagSettings", default, skip_serializing_if = "Option::is_none")]
@@ -601,7 +656,11 @@ impl CertificateCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListResult {
     #[doc = "Gets or sets a list of certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Certificate>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -725,7 +784,11 @@ impl ConnectionCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionListResult {
     #[doc = "Gets or sets a list of connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Connection>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -834,7 +897,11 @@ impl ConnectionTypeCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionTypeListResult {
     #[doc = "Gets or sets a list of connection types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectionType>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1051,7 +1118,11 @@ impl CredentialCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CredentialListResult {
     #[doc = "Gets or sets a list of credentials."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Credential>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1186,7 +1257,11 @@ impl DscCompilationJobCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscCompilationJobListResult {
     #[doc = "Gets or sets a list of Dsc Compilation jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscCompilationJob>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1403,7 +1478,11 @@ impl DscConfigurationCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscConfigurationListResult {
     #[doc = "Gets or sets a list of configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscConfiguration>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1660,7 +1739,11 @@ impl DscNodeConfigurationCreateOrUpdateParametersProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscNodeConfigurationListResult {
     #[doc = "Gets or sets a list of Dsc node configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscNodeConfiguration>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1726,7 +1809,11 @@ impl DscNodeExtensionHandlerAssociationProperty {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscNodeListResult {
     #[doc = "Gets or sets a list of dsc nodes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscNode>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1777,7 +1864,12 @@ pub struct DscNodeProperties {
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
     pub total_count: Option<i64>,
     #[doc = "Gets or sets the list of extensionHandler properties for a Node."]
-    #[serde(rename = "extensionHandler", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extensionHandler",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extension_handler: Vec<DscNodeExtensionHandlerAssociationProperty>,
 }
 impl DscNodeProperties {
@@ -1822,10 +1914,18 @@ pub struct DscNodeReport {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Gets or sets the errors for the node report."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<DscReportError>,
     #[doc = "Gets or sets the resource for the node report."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<DscReportResource>,
     #[doc = "Definition of the DSC Meta Configuration."]
     #[serde(rename = "metaConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -1834,10 +1934,20 @@ pub struct DscNodeReport {
     #[serde(rename = "hostName", default, skip_serializing_if = "Option::is_none")]
     pub host_name: Option<String>,
     #[doc = "Gets or sets the IPv4 address of the node that sent the report."]
-    #[serde(rename = "iPV4Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "iPV4Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub i_pv4_addresses: Vec<String>,
     #[doc = "Gets or sets the IPv6 address of the node that sent the report."]
-    #[serde(rename = "iPV6Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "iPV6Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub i_pv6_addresses: Vec<String>,
     #[doc = "Gets or sets the number of resource in the node report."]
     #[serde(rename = "numberOfResources", default, skip_serializing_if = "Option::is_none")]
@@ -1855,7 +1965,11 @@ impl DscNodeReport {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscNodeReportListResult {
     #[doc = "Gets or sets a list of dsc node reports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscNodeReport>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1937,7 +2051,12 @@ pub struct DscReportResource {
     #[serde(rename = "sourceInfo", default, skip_serializing_if = "Option::is_none")]
     pub source_info: Option<String>,
     #[doc = "Gets or sets the Resource Navigation values for resources the resource depends on."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<DscReportResourceNavigation>,
     #[doc = "Gets or sets the module name of the resource."]
     #[serde(rename = "moduleName", default, skip_serializing_if = "Option::is_none")]
@@ -2094,7 +2213,12 @@ pub struct HybridRunbookWorkerGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Gets or sets the list of hybrid runbook workers."]
-    #[serde(rename = "hybridRunbookWorkers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hybridRunbookWorkers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hybrid_runbook_workers: Vec<HybridRunbookWorker>,
     #[doc = "Definition of RunAs credential to use for hybrid worker."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2164,7 +2288,11 @@ impl HybridRunbookWorkerGroupUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HybridRunbookWorkerGroupsListResult {
     #[doc = "Gets or sets a list of hybrid runbook worker groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HybridRunbookWorkerGroup>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2373,7 +2501,11 @@ impl JobCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobListResultV2 {
     #[doc = "List of jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobCollectionItem>,
     #[doc = "The  link to the next page."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2604,7 +2736,11 @@ impl JobScheduleCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobScheduleListResult {
     #[doc = "Gets or sets a list of job schedules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobSchedule>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2664,7 +2800,11 @@ impl JobStream {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobStreamListResult {
     #[doc = "A list of job streams."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobStream>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2856,7 +2996,11 @@ pub mod key {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyListResult {
     #[doc = "Lists the automation keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<Key>,
 }
 impl KeyListResult {
@@ -2901,10 +3045,20 @@ pub struct LinuxProperties {
     #[serde(rename = "includedPackageClassifications", default, skip_serializing_if = "Option::is_none")]
     pub included_package_classifications: Option<linux_properties::IncludedPackageClassifications>,
     #[doc = "packages excluded from the software update configuration."]
-    #[serde(rename = "excludedPackageNameMasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPackageNameMasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_package_name_masks: Vec<String>,
     #[doc = "packages included from the software update configuration."]
-    #[serde(rename = "includedPackageNameMasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedPackageNameMasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_package_name_masks: Vec<String>,
     #[doc = "Reboot setting for the software update configuration."]
     #[serde(rename = "rebootSetting", default, skip_serializing_if = "Option::is_none")]
@@ -3032,7 +3186,11 @@ impl ModuleErrorInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ModuleListResult {
     #[doc = "Gets or sets a list of modules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Module>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3176,7 +3334,11 @@ impl NodeCountProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeCounts {
     #[doc = "Gets an array of counts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeCount>,
     #[doc = "Gets the total number of records matching countType criteria."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -3242,7 +3404,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Automation operations supported by the Automation resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -3274,7 +3440,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -3336,7 +3506,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -3357,7 +3531,12 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -3719,7 +3898,12 @@ pub struct RunbookDraft {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<serde_json::Value>,
     #[doc = "Gets or sets the runbook output types."]
-    #[serde(rename = "outputTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_types: Vec<String>,
 }
 impl RunbookDraft {
@@ -3876,7 +4060,11 @@ pub mod runbook_draft_undo_edit_result {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunbookListResult {
     #[doc = "Gets or sets a list of runbooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Runbook>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3942,7 +4130,12 @@ pub struct RunbookProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<serde_json::Value>,
     #[doc = "Gets or sets the runbook output types."]
-    #[serde(rename = "outputTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_types: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub draft: Option<RunbookDraft>,
@@ -4236,7 +4429,11 @@ impl ScheduleCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScheduleListResult {
     #[doc = "Gets or sets a list of schedules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Schedule>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4498,7 +4695,11 @@ pub mod source_control_create_or_update_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlListResult {
     #[doc = "The list of source controls."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControl>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4822,7 +5023,11 @@ impl SourceControlSyncJobCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlSyncJobListResult {
     #[doc = "The list of source control sync jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControlSyncJob>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5107,7 +5312,11 @@ pub mod source_control_sync_job_stream_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlSyncJobStreamsListBySyncJob {
     #[doc = "The list of source control sync job streams."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControlSyncJobStream>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5190,7 +5399,11 @@ impl Statistics {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StatisticsListResult {
     #[doc = "Gets or sets a list of statistics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Statistics>,
 }
 impl azure_core::Continuable for StatisticsListResult {
@@ -5232,10 +5445,20 @@ pub mod tag_settings_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TargetProperties {
     #[doc = "List of Azure queries in the software update configuration."]
-    #[serde(rename = "azureQueries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureQueries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_queries: Vec<AzureQueryProperties>,
     #[doc = "List of non Azure queries in the software update configuration."]
-    #[serde(rename = "nonAzureQueries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nonAzureQueries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub non_azure_queries: Vec<NonAzureQueryProperties>,
 }
 impl TargetProperties {
@@ -5336,7 +5559,11 @@ impl TypeField {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TypeFieldListResult {
     #[doc = "Gets or sets a list of fields."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TypeField>,
 }
 impl azure_core::Continuable for TypeFieldListResult {
@@ -5396,7 +5623,11 @@ impl UsageCounterName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "Gets or sets usage."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResult {
@@ -5459,7 +5690,11 @@ impl VariableCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VariableListResult {
     #[doc = "Gets or sets a list of variables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Variable>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5557,7 +5792,11 @@ impl Watcher {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WatcherListResult {
     #[doc = "Gets or sets a list of watchers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Watcher>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5694,7 +5933,11 @@ impl WebhookCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebhookListResult {
     #[doc = "Gets or sets a list of webhooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Webhook>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5796,10 +6039,20 @@ pub struct WindowsProperties {
     #[serde(rename = "includedUpdateClassifications", default, skip_serializing_if = "Option::is_none")]
     pub included_update_classifications: Option<windows_properties::IncludedUpdateClassifications>,
     #[doc = "KB numbers excluded from the software update configuration."]
-    #[serde(rename = "excludedKbNumbers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedKbNumbers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_kb_numbers: Vec<String>,
     #[doc = "KB numbers included from the software update configuration."]
-    #[serde(rename = "includedKbNumbers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedKbNumbers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_kb_numbers: Vec<String>,
     #[doc = "Reboot setting for the software update configuration."]
     #[serde(rename = "rebootSetting", default, skip_serializing_if = "Option::is_none")]
@@ -6010,7 +6263,11 @@ impl SoftwareUpdateConfigurationCollectionItemProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationListResult {
     #[doc = "outer object returned when listing all software update configurations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SoftwareUpdateConfigurationCollectionItem>,
 }
 impl SoftwareUpdateConfigurationListResult {
@@ -6040,7 +6297,11 @@ impl SoftwareUpdateConfigurationMachineRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationMachineRunListResult {
     #[doc = "outer object returned when listing all software update configuration machine runs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SoftwareUpdateConfigurationMachineRun>,
     #[doc = "link to next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6119,7 +6380,11 @@ impl SoftwareUpdateConfigurationRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationRunListResult {
     #[doc = "outer object returned when listing all software update configuration runs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SoftwareUpdateConfigurationRun>,
     #[doc = "link to next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6257,10 +6522,20 @@ pub struct UpdateConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "List of azure resource Ids for azure virtual machines targeted by the software update configuration."]
-    #[serde(rename = "azureVirtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureVirtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_virtual_machines: Vec<String>,
     #[doc = "List of names of non-azure machines targeted by the software update configuration."]
-    #[serde(rename = "nonAzureComputerNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nonAzureComputerNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub non_azure_computer_names: Vec<String>,
     #[doc = "Group specific to the update configuration."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/automation/src/package_2021_06_22/models.rs b/services/mgmt/automation/src/package_2021_06_22/models.rs
index ab84ed00d2..b606117ff3 100644
--- a/services/mgmt/automation/src/package_2021_06_22/models.rs
+++ b/services/mgmt/automation/src/package_2021_06_22/models.rs
@@ -25,7 +25,11 @@ impl Activity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActivityListResult {
     #[doc = "Gets or sets a list of activities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Activity>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -88,7 +92,12 @@ pub struct ActivityParameter {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Gets or sets the validation set of activity parameter."]
-    #[serde(rename = "validationSet", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationSet",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_set: Vec<ActivityParameterValidationSet>,
 }
 impl ActivityParameter {
@@ -103,7 +112,11 @@ pub struct ActivityParameterSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Gets or sets the parameters of the activity parameter set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ActivityParameter>,
 }
 impl ActivityParameterSet {
@@ -130,10 +143,20 @@ pub struct ActivityProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub definition: Option<String>,
     #[doc = "Gets or sets the parameter sets of the activity."]
-    #[serde(rename = "parameterSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parameterSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameter_sets: Vec<ActivityParameterSet>,
     #[doc = "Gets or sets the output types of the activity."]
-    #[serde(rename = "outputTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_types: Vec<ActivityOutputType>,
     #[doc = "Gets or sets the creation time."]
     #[serde(rename = "creationTime", default, with = "azure_core::date::rfc3339::option")]
@@ -154,13 +177,28 @@ impl ActivityProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdvancedSchedule {
     #[doc = "Days of the week that the job should execute on."]
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<String>,
     #[doc = "Days of the month that the job should execute on. Must be between 1 and 31."]
-    #[serde(rename = "monthDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub month_days: Vec<i32>,
     #[doc = "Occurrences of days within a month."]
-    #[serde(rename = "monthlyOccurrences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthlyOccurrences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monthly_occurrences: Vec<AdvancedScheduleMonthlyOccurrence>,
 }
 impl AdvancedSchedule {
@@ -395,7 +433,11 @@ impl AutomationAccountCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AutomationAccountListResult {
     #[doc = "Gets or sets list of accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AutomationAccount>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -437,7 +479,12 @@ pub struct AutomationAccountProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionProperties>,
     #[doc = "List of Automation operations supported by the Automation resource provider."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Indicates whether traffic on the non-ARM endpoint (Webhook/Agent) is allowed from the public internet"]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -545,10 +592,18 @@ impl AutomationAccountUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureQueryProperties {
     #[doc = "List of Subscription or Resource Group ARM Ids."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scope: Vec<String>,
     #[doc = "List of locations to scope the query to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Tag filter information for the VM."]
     #[serde(rename = "tagSettings", default, skip_serializing_if = "Option::is_none")]
@@ -616,7 +671,11 @@ impl CertificateCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListResult {
     #[doc = "Gets or sets a list of certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Certificate>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -740,7 +799,11 @@ impl ConnectionCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionListResult {
     #[doc = "Gets or sets a list of connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Connection>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -849,7 +912,11 @@ impl ConnectionTypeCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionTypeListResult {
     #[doc = "Gets or sets a list of connection types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectionType>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1066,7 +1133,11 @@ impl CredentialCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CredentialListResult {
     #[doc = "Gets or sets a list of credentials."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Credential>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1201,7 +1272,11 @@ impl DscCompilationJobCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscCompilationJobListResult {
     #[doc = "Gets or sets a list of Dsc Compilation jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscCompilationJob>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1418,7 +1493,11 @@ impl DscConfigurationCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscConfigurationListResult {
     #[doc = "Gets or sets a list of configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscConfiguration>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1675,7 +1754,11 @@ impl DscNodeConfigurationCreateOrUpdateParametersProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscNodeConfigurationListResult {
     #[doc = "Gets or sets a list of Dsc node configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscNodeConfiguration>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1741,7 +1824,11 @@ impl DscNodeExtensionHandlerAssociationProperty {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscNodeListResult {
     #[doc = "Gets or sets a list of dsc nodes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscNode>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1792,7 +1879,12 @@ pub struct DscNodeProperties {
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
     pub total_count: Option<i64>,
     #[doc = "Gets or sets the list of extensionHandler properties for a Node."]
-    #[serde(rename = "extensionHandler", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extensionHandler",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extension_handler: Vec<DscNodeExtensionHandlerAssociationProperty>,
 }
 impl DscNodeProperties {
@@ -1837,10 +1929,18 @@ pub struct DscNodeReport {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Gets or sets the errors for the node report."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<DscReportError>,
     #[doc = "Gets or sets the resource for the node report."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<DscReportResource>,
     #[doc = "Definition of the DSC Meta Configuration."]
     #[serde(rename = "metaConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -1849,10 +1949,20 @@ pub struct DscNodeReport {
     #[serde(rename = "hostName", default, skip_serializing_if = "Option::is_none")]
     pub host_name: Option<String>,
     #[doc = "Gets or sets the IPv4 address of the node that sent the report."]
-    #[serde(rename = "iPV4Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "iPV4Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub i_pv4_addresses: Vec<String>,
     #[doc = "Gets or sets the IPv6 address of the node that sent the report."]
-    #[serde(rename = "iPV6Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "iPV6Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub i_pv6_addresses: Vec<String>,
     #[doc = "Gets or sets the number of resource in the node report."]
     #[serde(rename = "numberOfResources", default, skip_serializing_if = "Option::is_none")]
@@ -1870,7 +1980,11 @@ impl DscNodeReport {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscNodeReportListResult {
     #[doc = "Gets or sets a list of dsc node reports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscNodeReport>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1952,7 +2066,12 @@ pub struct DscReportResource {
     #[serde(rename = "sourceInfo", default, skip_serializing_if = "Option::is_none")]
     pub source_info: Option<String>,
     #[doc = "Gets or sets the Resource Navigation values for resources the resource depends on."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<DscReportResourceNavigation>,
     #[doc = "Gets or sets the module name of the resource."]
     #[serde(rename = "moduleName", default, skip_serializing_if = "Option::is_none")]
@@ -2149,7 +2268,12 @@ pub struct HybridRunbookWorkerGroup {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "Gets or sets the list of hybrid runbook workers."]
-    #[serde(rename = "hybridRunbookWorkers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hybridRunbookWorkers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hybrid_runbook_workers: Vec<HybridRunbookWorkerLegacy>,
     #[doc = "Definition of RunAs credential to use for hybrid worker."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2234,7 +2358,11 @@ impl HybridRunbookWorkerGroupUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HybridRunbookWorkerGroupsListResult {
     #[doc = "Gets or sets a list of hybrid runbook worker groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HybridRunbookWorkerGroup>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2355,7 +2483,11 @@ pub mod hybrid_runbook_worker_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HybridRunbookWorkersListResult {
     #[doc = "Gets or sets a list of hybrid runbook workers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HybridRunbookWorker>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2564,7 +2696,11 @@ impl JobCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobListResultV2 {
     #[doc = "List of jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobCollectionItem>,
     #[doc = "The  link to the next page."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2795,7 +2931,11 @@ impl JobScheduleCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobScheduleListResult {
     #[doc = "Gets or sets a list of job schedules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobSchedule>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2855,7 +2995,11 @@ impl JobStream {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobStreamListResult {
     #[doc = "A list of job streams."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobStream>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3047,7 +3191,11 @@ pub mod key {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyListResult {
     #[doc = "Lists the automation keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<Key>,
 }
 impl KeyListResult {
@@ -3092,10 +3240,20 @@ pub struct LinuxProperties {
     #[serde(rename = "includedPackageClassifications", default, skip_serializing_if = "Option::is_none")]
     pub included_package_classifications: Option<linux_properties::IncludedPackageClassifications>,
     #[doc = "packages excluded from the software update configuration."]
-    #[serde(rename = "excludedPackageNameMasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPackageNameMasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_package_name_masks: Vec<String>,
     #[doc = "packages included from the software update configuration."]
-    #[serde(rename = "includedPackageNameMasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedPackageNameMasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_package_name_masks: Vec<String>,
     #[doc = "Reboot setting for the software update configuration."]
     #[serde(rename = "rebootSetting", default, skip_serializing_if = "Option::is_none")]
@@ -3223,7 +3381,11 @@ impl ModuleErrorInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ModuleListResult {
     #[doc = "Gets or sets a list of modules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Module>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3367,7 +3529,11 @@ impl NodeCountProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeCounts {
     #[doc = "Gets an array of counts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeCount>,
     #[doc = "Gets the total number of records matching countType criteria."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -3433,7 +3599,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Automation operations supported by the Automation resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -3465,7 +3635,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -3527,7 +3701,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -3548,7 +3726,12 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -3968,7 +4151,12 @@ pub struct RunbookDraft {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<serde_json::Value>,
     #[doc = "Gets or sets the runbook output types."]
-    #[serde(rename = "outputTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_types: Vec<String>,
 }
 impl RunbookDraft {
@@ -4125,7 +4313,11 @@ pub mod runbook_draft_undo_edit_result {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunbookListResult {
     #[doc = "Gets or sets a list of runbooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Runbook>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4191,7 +4383,12 @@ pub struct RunbookProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<serde_json::Value>,
     #[doc = "Gets or sets the runbook output types."]
-    #[serde(rename = "outputTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_types: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub draft: Option<RunbookDraft>,
@@ -4485,7 +4682,11 @@ impl ScheduleCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScheduleListResult {
     #[doc = "Gets or sets a list of schedules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Schedule>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4747,7 +4948,11 @@ pub mod source_control_create_or_update_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlListResult {
     #[doc = "The list of source controls."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControl>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5071,7 +5276,11 @@ impl SourceControlSyncJobCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlSyncJobListResult {
     #[doc = "The list of source control sync jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControlSyncJob>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5356,7 +5565,11 @@ pub mod source_control_sync_job_stream_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlSyncJobStreamsListBySyncJob {
     #[doc = "The list of source control sync job streams."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControlSyncJobStream>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5439,7 +5652,11 @@ impl Statistics {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StatisticsListResult {
     #[doc = "Gets or sets a list of statistics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Statistics>,
 }
 impl azure_core::Continuable for StatisticsListResult {
@@ -5481,10 +5698,20 @@ pub mod tag_settings_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TargetProperties {
     #[doc = "List of Azure queries in the software update configuration."]
-    #[serde(rename = "azureQueries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureQueries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_queries: Vec<AzureQueryProperties>,
     #[doc = "List of non Azure queries in the software update configuration."]
-    #[serde(rename = "nonAzureQueries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nonAzureQueries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub non_azure_queries: Vec<NonAzureQueryProperties>,
 }
 impl TargetProperties {
@@ -5585,7 +5812,11 @@ impl TypeField {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TypeFieldListResult {
     #[doc = "Gets or sets a list of fields."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TypeField>,
 }
 impl azure_core::Continuable for TypeFieldListResult {
@@ -5645,7 +5876,11 @@ impl UsageCounterName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "Gets or sets usage."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResult {
@@ -5708,7 +5943,11 @@ impl VariableCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VariableListResult {
     #[doc = "Gets or sets a list of variables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Variable>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5806,7 +6045,11 @@ impl Watcher {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WatcherListResult {
     #[doc = "Gets or sets a list of watchers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Watcher>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5943,7 +6186,11 @@ impl WebhookCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebhookListResult {
     #[doc = "Gets or sets a list of webhooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Webhook>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6045,10 +6292,20 @@ pub struct WindowsProperties {
     #[serde(rename = "includedUpdateClassifications", default, skip_serializing_if = "Option::is_none")]
     pub included_update_classifications: Option<windows_properties::IncludedUpdateClassifications>,
     #[doc = "KB numbers excluded from the software update configuration."]
-    #[serde(rename = "excludedKbNumbers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedKbNumbers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_kb_numbers: Vec<String>,
     #[doc = "KB numbers included from the software update configuration."]
-    #[serde(rename = "includedKbNumbers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedKbNumbers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_kb_numbers: Vec<String>,
     #[doc = "Reboot setting for the software update configuration."]
     #[serde(rename = "rebootSetting", default, skip_serializing_if = "Option::is_none")]
@@ -6259,7 +6516,11 @@ impl SoftwareUpdateConfigurationCollectionItemProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationListResult {
     #[doc = "outer object returned when listing all software update configurations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SoftwareUpdateConfigurationCollectionItem>,
 }
 impl SoftwareUpdateConfigurationListResult {
@@ -6289,7 +6550,11 @@ impl SoftwareUpdateConfigurationMachineRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationMachineRunListResult {
     #[doc = "outer object returned when listing all software update configuration machine runs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SoftwareUpdateConfigurationMachineRun>,
     #[doc = "link to next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6368,7 +6633,11 @@ impl SoftwareUpdateConfigurationRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationRunListResult {
     #[doc = "outer object returned when listing all software update configuration runs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SoftwareUpdateConfigurationRun>,
     #[doc = "link to next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6618,10 +6887,20 @@ pub struct UpdateConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "List of azure resource Ids for azure virtual machines targeted by the software update configuration."]
-    #[serde(rename = "azureVirtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureVirtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_virtual_machines: Vec<String>,
     #[doc = "List of names of non-azure machines targeted by the software update configuration."]
-    #[serde(rename = "nonAzureComputerNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nonAzureComputerNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub non_azure_computer_names: Vec<String>,
     #[doc = "Group specific to the update configuration."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/automation/src/package_2022_01_31/models.rs b/services/mgmt/automation/src/package_2022_01_31/models.rs
index 06c542c3ac..5e09cd9842 100644
--- a/services/mgmt/automation/src/package_2022_01_31/models.rs
+++ b/services/mgmt/automation/src/package_2022_01_31/models.rs
@@ -25,7 +25,11 @@ impl Activity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActivityListResult {
     #[doc = "Gets or sets a list of activities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Activity>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -88,7 +92,12 @@ pub struct ActivityParameter {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Gets or sets the validation set of activity parameter."]
-    #[serde(rename = "validationSet", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationSet",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_set: Vec<ActivityParameterValidationSet>,
 }
 impl ActivityParameter {
@@ -103,7 +112,11 @@ pub struct ActivityParameterSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Gets or sets the parameters of the activity parameter set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ActivityParameter>,
 }
 impl ActivityParameterSet {
@@ -130,10 +143,20 @@ pub struct ActivityProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub definition: Option<String>,
     #[doc = "Gets or sets the parameter sets of the activity."]
-    #[serde(rename = "parameterSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parameterSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameter_sets: Vec<ActivityParameterSet>,
     #[doc = "Gets or sets the output types of the activity."]
-    #[serde(rename = "outputTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_types: Vec<ActivityOutputType>,
     #[doc = "Gets or sets the creation time."]
     #[serde(rename = "creationTime", default, with = "azure_core::date::rfc3339::option")]
@@ -154,13 +177,28 @@ impl ActivityProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdvancedSchedule {
     #[doc = "Days of the week that the job should execute on."]
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<String>,
     #[doc = "Days of the month that the job should execute on. Must be between 1 and 31."]
-    #[serde(rename = "monthDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub month_days: Vec<i32>,
     #[doc = "Occurrences of days within a month."]
-    #[serde(rename = "monthlyOccurrences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthlyOccurrences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monthly_occurrences: Vec<AdvancedScheduleMonthlyOccurrence>,
 }
 impl AdvancedSchedule {
@@ -395,7 +433,11 @@ impl AutomationAccountCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AutomationAccountListResult {
     #[doc = "Gets or sets list of accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AutomationAccount>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -437,7 +479,12 @@ pub struct AutomationAccountProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionProperties>,
     #[doc = "List of Automation operations supported by the Automation resource provider."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Indicates whether traffic on the non-ARM endpoint (Webhook/Agent) is allowed from the public internet"]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -545,10 +592,18 @@ impl AutomationAccountUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureQueryProperties {
     #[doc = "List of Subscription or Resource Group ARM Ids."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scope: Vec<String>,
     #[doc = "List of locations to scope the query to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Tag filter information for the VM."]
     #[serde(rename = "tagSettings", default, skip_serializing_if = "Option::is_none")]
@@ -616,7 +671,11 @@ impl CertificateCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListResult {
     #[doc = "Gets or sets a list of certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Certificate>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -740,7 +799,11 @@ impl ConnectionCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionListResult {
     #[doc = "Gets or sets a list of connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Connection>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -849,7 +912,11 @@ impl ConnectionTypeCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionTypeListResult {
     #[doc = "Gets or sets a list of connection types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectionType>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1066,7 +1133,11 @@ impl CredentialCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CredentialListResult {
     #[doc = "Gets or sets a list of credentials."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Credential>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1165,7 +1236,11 @@ impl DeletedAutomationAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedAutomationAccountListResult {
     #[doc = "Gets or sets the list of deleted automation accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedAutomationAccount>,
 }
 impl DeletedAutomationAccountListResult {
@@ -1258,7 +1333,11 @@ impl DscCompilationJobCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscCompilationJobListResult {
     #[doc = "Gets or sets a list of Dsc Compilation jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscCompilationJob>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1475,7 +1554,11 @@ impl DscConfigurationCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscConfigurationListResult {
     #[doc = "Gets or sets a list of configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscConfiguration>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1732,7 +1815,11 @@ impl DscNodeConfigurationCreateOrUpdateParametersProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscNodeConfigurationListResult {
     #[doc = "Gets or sets a list of Dsc node configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscNodeConfiguration>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1798,7 +1885,11 @@ impl DscNodeExtensionHandlerAssociationProperty {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscNodeListResult {
     #[doc = "Gets or sets a list of dsc nodes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscNode>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1849,7 +1940,12 @@ pub struct DscNodeProperties {
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
     pub total_count: Option<i64>,
     #[doc = "Gets or sets the list of extensionHandler properties for a Node."]
-    #[serde(rename = "extensionHandler", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extensionHandler",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extension_handler: Vec<DscNodeExtensionHandlerAssociationProperty>,
 }
 impl DscNodeProperties {
@@ -1894,10 +1990,18 @@ pub struct DscNodeReport {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Gets or sets the errors for the node report."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<DscReportError>,
     #[doc = "Gets or sets the resource for the node report."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<DscReportResource>,
     #[doc = "Definition of the DSC Meta Configuration."]
     #[serde(rename = "metaConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -1906,10 +2010,20 @@ pub struct DscNodeReport {
     #[serde(rename = "hostName", default, skip_serializing_if = "Option::is_none")]
     pub host_name: Option<String>,
     #[doc = "Gets or sets the IPv4 address of the node that sent the report."]
-    #[serde(rename = "iPV4Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "iPV4Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub i_pv4_addresses: Vec<String>,
     #[doc = "Gets or sets the IPv6 address of the node that sent the report."]
-    #[serde(rename = "iPV6Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "iPV6Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub i_pv6_addresses: Vec<String>,
     #[doc = "Gets or sets the number of resource in the node report."]
     #[serde(rename = "numberOfResources", default, skip_serializing_if = "Option::is_none")]
@@ -1927,7 +2041,11 @@ impl DscNodeReport {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscNodeReportListResult {
     #[doc = "Gets or sets a list of dsc node reports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscNodeReport>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2009,7 +2127,12 @@ pub struct DscReportResource {
     #[serde(rename = "sourceInfo", default, skip_serializing_if = "Option::is_none")]
     pub source_info: Option<String>,
     #[doc = "Gets or sets the Resource Navigation values for resources the resource depends on."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<DscReportResourceNavigation>,
     #[doc = "Gets or sets the module name of the resource."]
     #[serde(rename = "moduleName", default, skip_serializing_if = "Option::is_none")]
@@ -2206,7 +2329,12 @@ pub struct HybridRunbookWorkerGroup {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "Gets or sets the list of hybrid runbook workers."]
-    #[serde(rename = "hybridRunbookWorkers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hybridRunbookWorkers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hybrid_runbook_workers: Vec<HybridRunbookWorkerLegacy>,
     #[doc = "Definition of RunAs credential to use for hybrid worker."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2291,7 +2419,11 @@ impl HybridRunbookWorkerGroupUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HybridRunbookWorkerGroupsListResult {
     #[doc = "Gets or sets a list of hybrid runbook worker groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HybridRunbookWorkerGroup>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2412,7 +2544,11 @@ pub mod hybrid_runbook_worker_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HybridRunbookWorkersListResult {
     #[doc = "Gets or sets a list of hybrid runbook workers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HybridRunbookWorker>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2621,7 +2757,11 @@ impl JobCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobListResultV2 {
     #[doc = "List of jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobCollectionItem>,
     #[doc = "The  link to the next page."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2852,7 +2992,11 @@ impl JobScheduleCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobScheduleListResult {
     #[doc = "Gets or sets a list of job schedules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobSchedule>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2912,7 +3056,11 @@ impl JobStream {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobStreamListResult {
     #[doc = "A list of job streams."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobStream>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3104,7 +3252,11 @@ pub mod key {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyListResult {
     #[doc = "Lists the automation keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<Key>,
 }
 impl KeyListResult {
@@ -3149,10 +3301,20 @@ pub struct LinuxProperties {
     #[serde(rename = "includedPackageClassifications", default, skip_serializing_if = "Option::is_none")]
     pub included_package_classifications: Option<linux_properties::IncludedPackageClassifications>,
     #[doc = "packages excluded from the software update configuration."]
-    #[serde(rename = "excludedPackageNameMasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPackageNameMasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_package_name_masks: Vec<String>,
     #[doc = "packages included from the software update configuration."]
-    #[serde(rename = "includedPackageNameMasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedPackageNameMasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_package_name_masks: Vec<String>,
     #[doc = "Reboot setting for the software update configuration."]
     #[serde(rename = "rebootSetting", default, skip_serializing_if = "Option::is_none")]
@@ -3280,7 +3442,11 @@ impl ModuleErrorInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ModuleListResult {
     #[doc = "Gets or sets a list of modules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Module>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3424,7 +3590,11 @@ impl NodeCountProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeCounts {
     #[doc = "Gets an array of counts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeCount>,
     #[doc = "Gets the total number of records matching countType criteria."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -3490,7 +3660,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Automation operations supported by the Automation resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -3522,7 +3696,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -3584,7 +3762,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -3605,7 +3787,12 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -4025,7 +4212,12 @@ pub struct RunbookDraft {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<serde_json::Value>,
     #[doc = "Gets or sets the runbook output types."]
-    #[serde(rename = "outputTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_types: Vec<String>,
 }
 impl RunbookDraft {
@@ -4182,7 +4374,11 @@ pub mod runbook_draft_undo_edit_result {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunbookListResult {
     #[doc = "Gets or sets a list of runbooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Runbook>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4248,7 +4444,12 @@ pub struct RunbookProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<serde_json::Value>,
     #[doc = "Gets or sets the runbook output types."]
-    #[serde(rename = "outputTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_types: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub draft: Option<RunbookDraft>,
@@ -4542,7 +4743,11 @@ impl ScheduleCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScheduleListResult {
     #[doc = "Gets or sets a list of schedules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Schedule>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4804,7 +5009,11 @@ pub mod source_control_create_or_update_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlListResult {
     #[doc = "The list of source controls."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControl>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5128,7 +5337,11 @@ impl SourceControlSyncJobCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlSyncJobListResult {
     #[doc = "The list of source control sync jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControlSyncJob>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5413,7 +5626,11 @@ pub mod source_control_sync_job_stream_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlSyncJobStreamsListBySyncJob {
     #[doc = "The list of source control sync job streams."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControlSyncJobStream>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5496,7 +5713,11 @@ impl Statistics {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StatisticsListResult {
     #[doc = "Gets or sets a list of statistics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Statistics>,
 }
 impl azure_core::Continuable for StatisticsListResult {
@@ -5538,10 +5759,20 @@ pub mod tag_settings_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TargetProperties {
     #[doc = "List of Azure queries in the software update configuration."]
-    #[serde(rename = "azureQueries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureQueries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_queries: Vec<AzureQueryProperties>,
     #[doc = "List of non Azure queries in the software update configuration."]
-    #[serde(rename = "nonAzureQueries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nonAzureQueries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub non_azure_queries: Vec<NonAzureQueryProperties>,
 }
 impl TargetProperties {
@@ -5642,7 +5873,11 @@ impl TypeField {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TypeFieldListResult {
     #[doc = "Gets or sets a list of fields."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TypeField>,
 }
 impl azure_core::Continuable for TypeFieldListResult {
@@ -5702,7 +5937,11 @@ impl UsageCounterName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "Gets or sets usage."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResult {
@@ -5765,7 +6004,11 @@ impl VariableCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VariableListResult {
     #[doc = "Gets or sets a list of variables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Variable>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5863,7 +6106,11 @@ impl Watcher {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WatcherListResult {
     #[doc = "Gets or sets a list of watchers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Watcher>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6000,7 +6247,11 @@ impl WebhookCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebhookListResult {
     #[doc = "Gets or sets a list of webhooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Webhook>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6102,10 +6353,20 @@ pub struct WindowsProperties {
     #[serde(rename = "includedUpdateClassifications", default, skip_serializing_if = "Option::is_none")]
     pub included_update_classifications: Option<windows_properties::IncludedUpdateClassifications>,
     #[doc = "KB numbers excluded from the software update configuration."]
-    #[serde(rename = "excludedKbNumbers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedKbNumbers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_kb_numbers: Vec<String>,
     #[doc = "KB numbers included from the software update configuration."]
-    #[serde(rename = "includedKbNumbers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedKbNumbers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_kb_numbers: Vec<String>,
     #[doc = "Reboot setting for the software update configuration."]
     #[serde(rename = "rebootSetting", default, skip_serializing_if = "Option::is_none")]
@@ -6316,7 +6577,11 @@ impl SoftwareUpdateConfigurationCollectionItemProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationListResult {
     #[doc = "outer object returned when listing all software update configurations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SoftwareUpdateConfigurationCollectionItem>,
 }
 impl SoftwareUpdateConfigurationListResult {
@@ -6346,7 +6611,11 @@ impl SoftwareUpdateConfigurationMachineRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationMachineRunListResult {
     #[doc = "outer object returned when listing all software update configuration machine runs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SoftwareUpdateConfigurationMachineRun>,
     #[doc = "link to next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6425,7 +6694,11 @@ impl SoftwareUpdateConfigurationRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationRunListResult {
     #[doc = "outer object returned when listing all software update configuration runs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SoftwareUpdateConfigurationRun>,
     #[doc = "link to next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6675,10 +6948,20 @@ pub struct UpdateConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "List of azure resource Ids for azure virtual machines targeted by the software update configuration."]
-    #[serde(rename = "azureVirtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureVirtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_virtual_machines: Vec<String>,
     #[doc = "List of names of non-azure machines targeted by the software update configuration."]
-    #[serde(rename = "nonAzureComputerNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nonAzureComputerNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub non_azure_computer_names: Vec<String>,
     #[doc = "Group specific to the update configuration."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/automation/src/package_2022_02_22/models.rs b/services/mgmt/automation/src/package_2022_02_22/models.rs
index c259cf4e7e..e2c025ccad 100644
--- a/services/mgmt/automation/src/package_2022_02_22/models.rs
+++ b/services/mgmt/automation/src/package_2022_02_22/models.rs
@@ -25,7 +25,11 @@ impl Activity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActivityListResult {
     #[doc = "Gets or sets a list of activities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Activity>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -88,7 +92,12 @@ pub struct ActivityParameter {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Gets or sets the validation set of activity parameter."]
-    #[serde(rename = "validationSet", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationSet",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_set: Vec<ActivityParameterValidationSet>,
 }
 impl ActivityParameter {
@@ -103,7 +112,11 @@ pub struct ActivityParameterSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Gets or sets the parameters of the activity parameter set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ActivityParameter>,
 }
 impl ActivityParameterSet {
@@ -130,10 +143,20 @@ pub struct ActivityProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub definition: Option<String>,
     #[doc = "Gets or sets the parameter sets of the activity."]
-    #[serde(rename = "parameterSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parameterSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameter_sets: Vec<ActivityParameterSet>,
     #[doc = "Gets or sets the output types of the activity."]
-    #[serde(rename = "outputTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_types: Vec<ActivityOutputType>,
     #[doc = "Gets or sets the creation time."]
     #[serde(rename = "creationTime", default, with = "azure_core::date::rfc3339::option")]
@@ -154,13 +177,28 @@ impl ActivityProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdvancedSchedule {
     #[doc = "Days of the week that the job should execute on."]
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<String>,
     #[doc = "Days of the month that the job should execute on. Must be between 1 and 31."]
-    #[serde(rename = "monthDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub month_days: Vec<i32>,
     #[doc = "Occurrences of days within a month."]
-    #[serde(rename = "monthlyOccurrences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthlyOccurrences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monthly_occurrences: Vec<AdvancedScheduleMonthlyOccurrence>,
 }
 impl AdvancedSchedule {
@@ -395,7 +433,11 @@ impl AutomationAccountCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AutomationAccountListResult {
     #[doc = "Gets or sets list of accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AutomationAccount>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -437,7 +479,12 @@ pub struct AutomationAccountProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionProperties>,
     #[doc = "List of Automation operations supported by the Automation resource provider."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Indicates whether traffic on the non-ARM endpoint (Webhook/Agent) is allowed from the public internet"]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -545,10 +592,18 @@ impl AutomationAccountUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureQueryProperties {
     #[doc = "List of Subscription or Resource Group ARM Ids."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scope: Vec<String>,
     #[doc = "List of locations to scope the query to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Tag filter information for the VM."]
     #[serde(rename = "tagSettings", default, skip_serializing_if = "Option::is_none")]
@@ -616,7 +671,11 @@ impl CertificateCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListResult {
     #[doc = "Gets or sets a list of certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Certificate>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -740,7 +799,11 @@ impl ConnectionCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionListResult {
     #[doc = "Gets or sets a list of connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Connection>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -849,7 +912,11 @@ impl ConnectionTypeCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionTypeListResult {
     #[doc = "Gets or sets a list of connection types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectionType>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1066,7 +1133,11 @@ impl CredentialCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CredentialListResult {
     #[doc = "Gets or sets a list of credentials."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Credential>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1165,7 +1236,11 @@ impl DeletedAutomationAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedAutomationAccountListResult {
     #[doc = "Gets or sets the list of deleted automation accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedAutomationAccount>,
 }
 impl DeletedAutomationAccountListResult {
@@ -1258,7 +1333,11 @@ impl DscCompilationJobCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscCompilationJobListResult {
     #[doc = "Gets or sets a list of Dsc Compilation jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscCompilationJob>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1475,7 +1554,11 @@ impl DscConfigurationCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscConfigurationListResult {
     #[doc = "Gets or sets a list of configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscConfiguration>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1732,7 +1815,11 @@ impl DscNodeConfigurationCreateOrUpdateParametersProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscNodeConfigurationListResult {
     #[doc = "Gets or sets a list of Dsc node configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscNodeConfiguration>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1798,7 +1885,11 @@ impl DscNodeExtensionHandlerAssociationProperty {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscNodeListResult {
     #[doc = "Gets or sets a list of dsc nodes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscNode>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1849,7 +1940,12 @@ pub struct DscNodeProperties {
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
     pub total_count: Option<i64>,
     #[doc = "Gets or sets the list of extensionHandler properties for a Node."]
-    #[serde(rename = "extensionHandler", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extensionHandler",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extension_handler: Vec<DscNodeExtensionHandlerAssociationProperty>,
 }
 impl DscNodeProperties {
@@ -1894,10 +1990,18 @@ pub struct DscNodeReport {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Gets or sets the errors for the node report."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<DscReportError>,
     #[doc = "Gets or sets the resource for the node report."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<DscReportResource>,
     #[doc = "Definition of the DSC Meta Configuration."]
     #[serde(rename = "metaConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -1906,10 +2010,20 @@ pub struct DscNodeReport {
     #[serde(rename = "hostName", default, skip_serializing_if = "Option::is_none")]
     pub host_name: Option<String>,
     #[doc = "Gets or sets the IPv4 address of the node that sent the report."]
-    #[serde(rename = "iPV4Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "iPV4Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub i_pv4_addresses: Vec<String>,
     #[doc = "Gets or sets the IPv6 address of the node that sent the report."]
-    #[serde(rename = "iPV6Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "iPV6Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub i_pv6_addresses: Vec<String>,
     #[doc = "Gets or sets the number of resource in the node report."]
     #[serde(rename = "numberOfResources", default, skip_serializing_if = "Option::is_none")]
@@ -1927,7 +2041,11 @@ impl DscNodeReport {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscNodeReportListResult {
     #[doc = "Gets or sets a list of dsc node reports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscNodeReport>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2009,7 +2127,12 @@ pub struct DscReportResource {
     #[serde(rename = "sourceInfo", default, skip_serializing_if = "Option::is_none")]
     pub source_info: Option<String>,
     #[doc = "Gets or sets the Resource Navigation values for resources the resource depends on."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<DscReportResourceNavigation>,
     #[doc = "Gets or sets the module name of the resource."]
     #[serde(rename = "moduleName", default, skip_serializing_if = "Option::is_none")]
@@ -2296,7 +2419,11 @@ pub mod hybrid_runbook_worker_group_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HybridRunbookWorkerGroupsListResult {
     #[doc = "Gets or sets a list of hybrid runbook worker groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HybridRunbookWorkerGroup>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2396,7 +2523,11 @@ pub mod hybrid_runbook_worker_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HybridRunbookWorkersListResult {
     #[doc = "Gets or sets a list of hybrid runbook workers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HybridRunbookWorker>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2605,7 +2736,11 @@ impl JobCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobListResultV2 {
     #[doc = "List of jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobCollectionItem>,
     #[doc = "The  link to the next page."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2836,7 +2971,11 @@ impl JobScheduleCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobScheduleListResult {
     #[doc = "Gets or sets a list of job schedules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobSchedule>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2896,7 +3035,11 @@ impl JobStream {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobStreamListResult {
     #[doc = "A list of job streams."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobStream>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3088,7 +3231,11 @@ pub mod key {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyListResult {
     #[doc = "Lists the automation keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<Key>,
 }
 impl KeyListResult {
@@ -3133,10 +3280,20 @@ pub struct LinuxProperties {
     #[serde(rename = "includedPackageClassifications", default, skip_serializing_if = "Option::is_none")]
     pub included_package_classifications: Option<linux_properties::IncludedPackageClassifications>,
     #[doc = "packages excluded from the software update configuration."]
-    #[serde(rename = "excludedPackageNameMasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPackageNameMasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_package_name_masks: Vec<String>,
     #[doc = "packages included from the software update configuration."]
-    #[serde(rename = "includedPackageNameMasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedPackageNameMasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_package_name_masks: Vec<String>,
     #[doc = "Reboot setting for the software update configuration."]
     #[serde(rename = "rebootSetting", default, skip_serializing_if = "Option::is_none")]
@@ -3264,7 +3421,11 @@ impl ModuleErrorInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ModuleListResult {
     #[doc = "Gets or sets a list of modules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Module>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3408,7 +3569,11 @@ impl NodeCountProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeCounts {
     #[doc = "Gets an array of counts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeCount>,
     #[doc = "Gets the total number of records matching countType criteria."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -3474,7 +3639,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Automation operations supported by the Automation resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -3506,7 +3675,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -3568,7 +3741,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -3589,7 +3766,12 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -4009,7 +4191,12 @@ pub struct RunbookDraft {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<serde_json::Value>,
     #[doc = "Gets or sets the runbook output types."]
-    #[serde(rename = "outputTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_types: Vec<String>,
 }
 impl RunbookDraft {
@@ -4166,7 +4353,11 @@ pub mod runbook_draft_undo_edit_result {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunbookListResult {
     #[doc = "Gets or sets a list of runbooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Runbook>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4232,7 +4423,12 @@ pub struct RunbookProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<serde_json::Value>,
     #[doc = "Gets or sets the runbook output types."]
-    #[serde(rename = "outputTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_types: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub draft: Option<RunbookDraft>,
@@ -4526,7 +4722,11 @@ impl ScheduleCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScheduleListResult {
     #[doc = "Gets or sets a list of schedules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Schedule>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4788,7 +4988,11 @@ pub mod source_control_create_or_update_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlListResult {
     #[doc = "The list of source controls."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControl>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5112,7 +5316,11 @@ impl SourceControlSyncJobCreateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlSyncJobListResult {
     #[doc = "The list of source control sync jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControlSyncJob>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5397,7 +5605,11 @@ pub mod source_control_sync_job_stream_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlSyncJobStreamsListBySyncJob {
     #[doc = "The list of source control sync job streams."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControlSyncJobStream>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5480,7 +5692,11 @@ impl Statistics {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StatisticsListResult {
     #[doc = "Gets or sets a list of statistics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Statistics>,
 }
 impl azure_core::Continuable for StatisticsListResult {
@@ -5522,10 +5738,20 @@ pub mod tag_settings_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TargetProperties {
     #[doc = "List of Azure queries in the software update configuration."]
-    #[serde(rename = "azureQueries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureQueries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_queries: Vec<AzureQueryProperties>,
     #[doc = "List of non Azure queries in the software update configuration."]
-    #[serde(rename = "nonAzureQueries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nonAzureQueries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub non_azure_queries: Vec<NonAzureQueryProperties>,
 }
 impl TargetProperties {
@@ -5626,7 +5852,11 @@ impl TypeField {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TypeFieldListResult {
     #[doc = "Gets or sets a list of fields."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TypeField>,
 }
 impl azure_core::Continuable for TypeFieldListResult {
@@ -5686,7 +5916,11 @@ impl UsageCounterName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "Gets or sets usage."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResult {
@@ -5749,7 +5983,11 @@ impl VariableCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VariableListResult {
     #[doc = "Gets or sets a list of variables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Variable>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5847,7 +6085,11 @@ impl Watcher {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WatcherListResult {
     #[doc = "Gets or sets a list of watchers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Watcher>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5984,7 +6226,11 @@ impl WebhookCreateOrUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebhookListResult {
     #[doc = "Gets or sets a list of webhooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Webhook>,
     #[doc = "Gets or sets the next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6086,10 +6332,20 @@ pub struct WindowsProperties {
     #[serde(rename = "includedUpdateClassifications", default, skip_serializing_if = "Option::is_none")]
     pub included_update_classifications: Option<windows_properties::IncludedUpdateClassifications>,
     #[doc = "KB numbers excluded from the software update configuration."]
-    #[serde(rename = "excludedKbNumbers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedKbNumbers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_kb_numbers: Vec<String>,
     #[doc = "KB numbers included from the software update configuration."]
-    #[serde(rename = "includedKbNumbers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedKbNumbers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_kb_numbers: Vec<String>,
     #[doc = "Reboot setting for the software update configuration."]
     #[serde(rename = "rebootSetting", default, skip_serializing_if = "Option::is_none")]
@@ -6300,7 +6556,11 @@ impl SoftwareUpdateConfigurationCollectionItemProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationListResult {
     #[doc = "outer object returned when listing all software update configurations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SoftwareUpdateConfigurationCollectionItem>,
 }
 impl SoftwareUpdateConfigurationListResult {
@@ -6330,7 +6590,11 @@ impl SoftwareUpdateConfigurationMachineRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationMachineRunListResult {
     #[doc = "outer object returned when listing all software update configuration machine runs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SoftwareUpdateConfigurationMachineRun>,
     #[doc = "link to next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6409,7 +6673,11 @@ impl SoftwareUpdateConfigurationRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationRunListResult {
     #[doc = "outer object returned when listing all software update configuration runs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SoftwareUpdateConfigurationRun>,
     #[doc = "link to next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6659,10 +6927,20 @@ pub struct UpdateConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "List of azure resource Ids for azure virtual machines targeted by the software update configuration."]
-    #[serde(rename = "azureVirtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureVirtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_virtual_machines: Vec<String>,
     #[doc = "List of names of non-azure machines targeted by the software update configuration."]
-    #[serde(rename = "nonAzureComputerNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nonAzureComputerNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub non_azure_computer_names: Vec<String>,
     #[doc = "Group specific to the update configuration."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/baremetalinfrastructure/src/package_2020_08_06_preview/models.rs b/services/mgmt/baremetalinfrastructure/src/package_2020_08_06_preview/models.rs
index af327b50e0..4b5150127c 100644
--- a/services/mgmt/baremetalinfrastructure/src/package_2020_08_06_preview/models.rs
+++ b/services/mgmt/baremetalinfrastructure/src/package_2020_08_06_preview/models.rs
@@ -164,7 +164,11 @@ pub mod azure_bare_metal_instance_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureBareMetalInstancesListResult {
     #[doc = "The list of Azure BareMetal instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureBareMetalInstance>,
     #[doc = "The URL to get the next set of AzureBareMetal instances."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -233,7 +237,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -451,7 +459,12 @@ impl IpAddress {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfile {
     #[doc = "Specifies the network interfaces for the AzureBareMetal instance."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<IpAddress>,
     #[doc = "Specifies the circuit id for connecting to express route."]
     #[serde(rename = "circuitId", default, skip_serializing_if = "Option::is_none")]
@@ -505,7 +518,11 @@ impl Operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of AzureBareMetal operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationList {
@@ -556,7 +573,12 @@ pub struct StorageProfile {
     #[serde(rename = "nfsIpAddress", default, skip_serializing_if = "Option::is_none")]
     pub nfs_ip_address: Option<String>,
     #[doc = "Specifies information about the operating system disk used by baremetal instance."]
-    #[serde(rename = "osDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "osDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub os_disks: Vec<Disk>,
 }
 impl StorageProfile {
diff --git a/services/mgmt/baremetalinfrastructure/src/package_2021_08_09/models.rs b/services/mgmt/baremetalinfrastructure/src/package_2021_08_09/models.rs
index 07e786a90b..a8910b8554 100644
--- a/services/mgmt/baremetalinfrastructure/src/package_2021_08_09/models.rs
+++ b/services/mgmt/baremetalinfrastructure/src/package_2021_08_09/models.rs
@@ -168,7 +168,11 @@ pub mod azure_bare_metal_instance_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureBareMetalInstancesListResult {
     #[doc = "The list of Azure BareMetal instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureBareMetalInstance>,
     #[doc = "The URL to get the next set of AzureBareMetal instances."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -234,7 +238,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -452,7 +460,12 @@ impl IpAddress {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfile {
     #[doc = "Specifies the network interfaces for the AzureBareMetal instance."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<IpAddress>,
     #[doc = "Specifies the circuit id for connecting to express route."]
     #[serde(rename = "circuitId", default, skip_serializing_if = "Option::is_none")]
@@ -506,7 +519,11 @@ impl Operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of AzureBareMetal operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationList {
@@ -557,7 +574,12 @@ pub struct StorageProfile {
     #[serde(rename = "nfsIpAddress", default, skip_serializing_if = "Option::is_none")]
     pub nfs_ip_address: Option<String>,
     #[doc = "Specifies information about the operating system disk used by baremetal instance."]
-    #[serde(rename = "osDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "osDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub os_disks: Vec<Disk>,
 }
 impl StorageProfile {
diff --git a/services/mgmt/batch/src/package_2020_09/models.rs b/services/mgmt/batch/src/package_2020_09/models.rs
index 05c0abe31b..9e3a8bc133 100644
--- a/services/mgmt/batch/src/package_2020_09/models.rs
+++ b/services/mgmt/batch/src/package_2020_09/models.rs
@@ -130,7 +130,11 @@ pub struct AutoScaleRunError {
     pub code: String,
     #[doc = "A message describing the error, intended to be suitable for display in a user interface."]
     pub message: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<AutoScaleRunError>,
 }
 impl AutoScaleRunError {
@@ -385,7 +389,11 @@ impl BatchAccountKeys {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BatchAccountListResult {
     #[doc = "The collection of Batch accounts returned by the listing operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BatchAccount>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -421,7 +429,12 @@ pub struct BatchAccountProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<PublicNetworkAccessType>,
     #[doc = "List of private endpoint connections associated with the Batch account"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Contains information about the auto-storage account associated with a Batch account."]
     #[serde(rename = "autoStorage", default, skip_serializing_if = "Option::is_none")]
@@ -436,7 +449,12 @@ pub struct BatchAccountProperties {
     #[serde(rename = "lowPriorityCoreQuota", default, skip_serializing_if = "Option::is_none")]
     pub low_priority_core_quota: Option<i32>,
     #[doc = "A list of the dedicated core quota per Virtual Machine family for the Batch account. For accounts with PoolAllocationMode set to UserSubscription, quota is managed on the subscription so this value is not returned."]
-    #[serde(rename = "dedicatedCoreQuotaPerVMFamily", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dedicatedCoreQuotaPerVMFamily",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dedicated_core_quota_per_vm_family: Vec<VirtualMachineFamilyCoreQuota>,
     #[doc = "Batch is transitioning its core quota system for dedicated cores to be enforced per Virtual Machine family. During this transitional phase, the dedicated core quota per Virtual Machine family may not yet be enforced. If this flag is false, dedicated core quota is enforced via the old dedicatedCoreQuota property on the account and does not consider Virtual Machine family. If this flag is true, dedicated core quota is enforced via the dedicatedCoreQuotaPerVMFamily property on the account, and the old dedicatedCoreQuota does not apply."]
     #[serde(rename = "dedicatedCoreQuotaPerVMFamilyEnforced", default, skip_serializing_if = "Option::is_none")]
@@ -688,7 +706,11 @@ pub struct CertificateReference {
     #[doc = "This property is applicable only for pools configured with Windows nodes (that is, created with cloudServiceConfiguration, or with virtualMachineConfiguration using a Windows image reference). Common store names include: My, Root, CA, Trust, Disallowed, TrustedPeople, TrustedPublisher, AuthRoot, AddressBook, but any custom store name can also be used. The default value is My."]
     #[serde(rename = "storeName", default, skip_serializing_if = "Option::is_none")]
     pub store_name: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub visibility: Vec<String>,
 }
 impl CertificateReference {
@@ -791,7 +813,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -828,10 +854,20 @@ pub struct ContainerConfiguration {
     #[serde(rename = "type")]
     pub type_: container_configuration::Type,
     #[doc = "This is the full image reference, as would be specified to \"docker pull\". An image will be sourced from the default Docker registry unless the image is fully qualified with an alternative registry."]
-    #[serde(rename = "containerImageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerImageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_image_names: Vec<String>,
     #[doc = "If any images must be downloaded from a private registry which requires credentials, then those credentials must be provided here."]
-    #[serde(rename = "containerRegistries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerRegistries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_registries: Vec<ContainerRegistry>,
 }
 impl ContainerConfiguration {
@@ -900,7 +936,11 @@ pub struct DeleteCertificateError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<DeleteCertificateError>,
 }
 impl DeleteCertificateError {
@@ -929,7 +969,11 @@ impl DeploymentConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskEncryptionConfiguration {
     #[doc = "On Linux pool, only \"TemporaryDisk\" is supported; on Windows pool, \"OsDisk\" and \"TemporaryDisk\" must be specified."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<String>,
 }
 impl DiskEncryptionConfiguration {
@@ -1043,7 +1087,12 @@ pub struct InboundNatPool {
     #[serde(rename = "frontendPortRangeEnd")]
     pub frontend_port_range_end: i32,
     #[doc = "The maximum number of rules that can be specified across all the endpoints on a Batch pool is 25. If no network security group rules are specified, a default rule will be created to allow inbound access to the specified backendPort. If the maximum number of network security group rules is exceeded the request fails with HTTP status code 400."]
-    #[serde(rename = "networkSecurityGroupRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityGroupRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_group_rules: Vec<NetworkSecurityGroupRule>,
 }
 impl InboundNatPool {
@@ -1120,7 +1169,11 @@ impl LinuxUserConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListApplicationPackagesResult {
     #[doc = "The list of application packages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationPackage>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1141,7 +1194,11 @@ impl ListApplicationPackagesResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListApplicationsResult {
     #[doc = "The list of applications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1162,7 +1219,11 @@ impl ListApplicationsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListCertificatesResult {
     #[doc = "The collection of returned certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Certificate>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1183,7 +1244,11 @@ impl ListCertificatesResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPoolsResult {
     #[doc = "The collection of returned pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Pool>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1204,7 +1269,11 @@ impl ListPoolsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPrivateEndpointConnectionsResult {
     #[doc = "The collection of returned private endpoint connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1225,7 +1294,11 @@ impl ListPrivateEndpointConnectionsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPrivateLinkResourcesResult {
     #[doc = "The collection of returned private link resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1314,7 +1387,12 @@ pub struct NetworkSecurityGroupRule {
     #[serde(rename = "sourceAddressPrefix")]
     pub source_address_prefix: String,
     #[doc = "Valid values are '*' (for all ports 0 - 65535) or arrays of ports or port ranges (i.e. 100-200). The ports should in the range of 0 to 65535 and the port ranges or ports can't overlap. If any other values are provided the request fails with HTTP status code 400. Default value will be *."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
 }
 impl NetworkSecurityGroupRule {
@@ -1374,7 +1452,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1465,28 +1547,56 @@ pub struct PoolProperties {
     pub task_slots_per_node: Option<i32>,
     #[serde(rename = "taskSchedulingPolicy", default, skip_serializing_if = "Option::is_none")]
     pub task_scheduling_policy: Option<TaskSchedulingPolicy>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[doc = "In some cases the start task may be re-run even though the node was not rebooted. Due to this, start tasks should be idempotent and exit gracefully if the setup they're performing has already been done. Special care should be taken to avoid start tasks which create breakaway process or install/launch services from the start task working directory, as this will block Batch from being able to re-run the start task."]
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows compute nodes, the Batch service installs the certificates to the specified certificate store and location. For Linux compute nodes, the certificates are stored in a directory inside the task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the task to query for this location. For certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and certificates are placed in that directory."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<CertificateReference>,
     #[doc = "Changes to application package references affect all new compute nodes joining the pool, but do not affect compute nodes that are already in the pool until they are rebooted or reimaged. There is a maximum of 10 application package references on any given pool."]
-    #[serde(rename = "applicationPackages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_packages: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, pool creation will fail."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
     #[doc = "Describes either the current operation (if the pool AllocationState is Resizing) or the previously completed operation (if the AllocationState is Steady)."]
     #[serde(rename = "resizeOperationStatus", default, skip_serializing_if = "Option::is_none")]
     pub resize_operation_status: Option<ResizeOperationStatus>,
     #[doc = "This supports Azure Files, NFS, CIFS/SMB, and Blobfuse."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl PoolProperties {
@@ -1585,9 +1695,19 @@ pub struct PrivateLinkResourceProperties {
     #[doc = "The group id is used to establish the private link connection."]
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1647,7 +1767,12 @@ pub struct PublicIpAddressConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub provision: Option<IpAddressProvisioningType>,
     #[doc = "The number of IPs specified here limits the maximum size of the Pool - 100 dedicated nodes or 100 low-priority nodes can be allocated for each public IP. For example, a pool needing 250 dedicated VMs would need at least 3 public IPs specified. Each element of this collection is of the form: /subscriptions/{subscription}/resourceGroups/{group}/providers/Microsoft.Network/publicIPAddresses/{ip}."]
-    #[serde(rename = "ipAddressIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddressIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_address_ids: Vec<String>,
 }
 impl PublicIpAddressConfiguration {
@@ -1672,7 +1797,11 @@ pub struct ResizeError {
     pub code: String,
     #[doc = "A message describing the error, intended to be suitable for display in a user interface."]
     pub message: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ResizeError>,
 }
 impl ResizeError {
@@ -1699,7 +1828,11 @@ pub struct ResizeOperationStatus {
     #[serde(rename = "startTime", default, with = "azure_core::date::rfc3339::option")]
     pub start_time: Option<time::OffsetDateTime>,
     #[doc = "This property is set only if an error occurred during the last pool resize, and only when the pool allocationState is Steady."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ResizeError>,
 }
 impl ResizeOperationStatus {
@@ -1776,9 +1909,19 @@ pub struct StartTask {
     #[doc = "The command line does not run under a shell, and therefore cannot take advantage of shell features such as environment variable expansion. If you want to take advantage of such features, you should invoke the shell in the command line, for example using \"cmd /c MyCommand\" in Windows or \"/bin/sh -c MyCommand\" in Linux. Required if any other properties of the startTask are specified."]
     #[serde(rename = "commandLine", default, skip_serializing_if = "Option::is_none")]
     pub command_line: Option<String>,
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[doc = "Specify either the userName or autoUser property, but not both."]
     #[serde(rename = "userIdentity", default, skip_serializing_if = "Option::is_none")]
@@ -1899,7 +2042,12 @@ pub struct VirtualMachineConfiguration {
     #[serde(rename = "windowsConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub windows_configuration: Option<WindowsConfiguration>,
     #[doc = "This property must be specified if the compute nodes in the pool need to have empty data disks attached to them."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
     #[doc = "This only applies to images that contain the Windows operating system, and should only be used when you hold valid on-premises licenses for the nodes which will be deployed. If omitted, no on-premises licensing discount is applied. Values are:\n\n Windows_Server - The on-premises license is for Windows Server.\n Windows_Client - The on-premises license is for Windows Client.\n"]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/batch/src/package_2021_01/models.rs b/services/mgmt/batch/src/package_2021_01/models.rs
index 04d5ffa8dc..412068f2ac 100644
--- a/services/mgmt/batch/src/package_2021_01/models.rs
+++ b/services/mgmt/batch/src/package_2021_01/models.rs
@@ -130,7 +130,11 @@ pub struct AutoScaleRunError {
     pub code: String,
     #[doc = "A message describing the error, intended to be suitable for display in a user interface."]
     pub message: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<AutoScaleRunError>,
 }
 impl AutoScaleRunError {
@@ -390,7 +394,11 @@ impl BatchAccountKeys {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BatchAccountListResult {
     #[doc = "The collection of Batch accounts returned by the listing operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BatchAccount>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -426,7 +434,12 @@ pub struct BatchAccountProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<PublicNetworkAccessType>,
     #[doc = "List of private endpoint connections associated with the Batch account"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Contains information about the auto-storage account associated with a Batch account."]
     #[serde(rename = "autoStorage", default, skip_serializing_if = "Option::is_none")]
@@ -441,7 +454,12 @@ pub struct BatchAccountProperties {
     #[serde(rename = "lowPriorityCoreQuota", default, skip_serializing_if = "Option::is_none")]
     pub low_priority_core_quota: Option<i32>,
     #[doc = "A list of the dedicated core quota per Virtual Machine family for the Batch account. For accounts with PoolAllocationMode set to UserSubscription, quota is managed on the subscription so this value is not returned."]
-    #[serde(rename = "dedicatedCoreQuotaPerVMFamily", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dedicatedCoreQuotaPerVMFamily",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dedicated_core_quota_per_vm_family: Vec<VirtualMachineFamilyCoreQuota>,
     #[doc = "Batch is transitioning its core quota system for dedicated cores to be enforced per Virtual Machine family. During this transitional phase, the dedicated core quota per Virtual Machine family may not yet be enforced. If this flag is false, dedicated core quota is enforced via the old dedicatedCoreQuota property on the account and does not consider Virtual Machine family. If this flag is true, dedicated core quota is enforced via the dedicatedCoreQuotaPerVMFamily property on the account, and the old dedicatedCoreQuota does not apply."]
     #[serde(rename = "dedicatedCoreQuotaPerVMFamilyEnforced", default, skip_serializing_if = "Option::is_none")]
@@ -720,7 +738,11 @@ pub struct CertificateReference {
     #[doc = "This property is applicable only for pools configured with Windows nodes (that is, created with cloudServiceConfiguration, or with virtualMachineConfiguration using a Windows image reference). Common store names include: My, Root, CA, Trust, Disallowed, TrustedPeople, TrustedPublisher, AuthRoot, AddressBook, but any custom store name can also be used. The default value is My."]
     #[serde(rename = "storeName", default, skip_serializing_if = "Option::is_none")]
     pub store_name: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub visibility: Vec<String>,
 }
 impl CertificateReference {
@@ -823,7 +845,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -860,10 +886,20 @@ pub struct ContainerConfiguration {
     #[serde(rename = "type")]
     pub type_: container_configuration::Type,
     #[doc = "This is the full image reference, as would be specified to \"docker pull\". An image will be sourced from the default Docker registry unless the image is fully qualified with an alternative registry."]
-    #[serde(rename = "containerImageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerImageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_image_names: Vec<String>,
     #[doc = "If any images must be downloaded from a private registry which requires credentials, then those credentials must be provided here."]
-    #[serde(rename = "containerRegistries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerRegistries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_registries: Vec<ContainerRegistry>,
 }
 impl ContainerConfiguration {
@@ -932,7 +968,11 @@ pub struct DeleteCertificateError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<DeleteCertificateError>,
 }
 impl DeleteCertificateError {
@@ -961,7 +1001,11 @@ impl DeploymentConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskEncryptionConfiguration {
     #[doc = "On Linux pool, only \"TemporaryDisk\" is supported; on Windows pool, \"OsDisk\" and \"TemporaryDisk\" must be specified."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<String>,
 }
 impl DiskEncryptionConfiguration {
@@ -1075,7 +1119,12 @@ pub struct InboundNatPool {
     #[serde(rename = "frontendPortRangeEnd")]
     pub frontend_port_range_end: i32,
     #[doc = "The maximum number of rules that can be specified across all the endpoints on a Batch pool is 25. If no network security group rules are specified, a default rule will be created to allow inbound access to the specified backendPort. If the maximum number of network security group rules is exceeded the request fails with HTTP status code 400."]
-    #[serde(rename = "networkSecurityGroupRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityGroupRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_group_rules: Vec<NetworkSecurityGroupRule>,
 }
 impl InboundNatPool {
@@ -1152,7 +1201,11 @@ impl LinuxUserConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListApplicationPackagesResult {
     #[doc = "The list of application packages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationPackage>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1173,7 +1226,11 @@ impl ListApplicationPackagesResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListApplicationsResult {
     #[doc = "The list of applications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1194,7 +1251,11 @@ impl ListApplicationsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListCertificatesResult {
     #[doc = "The collection of returned certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Certificate>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1215,7 +1276,11 @@ impl ListCertificatesResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPoolsResult {
     #[doc = "The collection of returned pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Pool>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1236,7 +1301,11 @@ impl ListPoolsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPrivateEndpointConnectionsResult {
     #[doc = "The collection of returned private endpoint connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1257,7 +1326,11 @@ impl ListPrivateEndpointConnectionsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPrivateLinkResourcesResult {
     #[doc = "The collection of returned private link resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1346,7 +1419,12 @@ pub struct NetworkSecurityGroupRule {
     #[serde(rename = "sourceAddressPrefix")]
     pub source_address_prefix: String,
     #[doc = "Valid values are '*' (for all ports 0 - 65535) or arrays of ports or port ranges (i.e. 100-200). The ports should in the range of 0 to 65535 and the port ranges or ports can't overlap. If any other values are provided the request fails with HTTP status code 400. Default value will be *."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
 }
 impl NetworkSecurityGroupRule {
@@ -1424,7 +1502,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1518,28 +1600,56 @@ pub struct PoolProperties {
     pub task_slots_per_node: Option<i32>,
     #[serde(rename = "taskSchedulingPolicy", default, skip_serializing_if = "Option::is_none")]
     pub task_scheduling_policy: Option<TaskSchedulingPolicy>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[doc = "In some cases the start task may be re-run even though the node was not rebooted. Due to this, start tasks should be idempotent and exit gracefully if the setup they're performing has already been done. Special care should be taken to avoid start tasks which create breakaway process or install/launch services from the start task working directory, as this will block Batch from being able to re-run the start task."]
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows compute nodes, the Batch service installs the certificates to the specified certificate store and location. For Linux compute nodes, the certificates are stored in a directory inside the task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the task to query for this location. For certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and certificates are placed in that directory."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<CertificateReference>,
     #[doc = "Changes to application package references affect all new compute nodes joining the pool, but do not affect compute nodes that are already in the pool until they are rebooted or reimaged. There is a maximum of 10 application package references on any given pool."]
-    #[serde(rename = "applicationPackages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_packages: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, pool creation will fail."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
     #[doc = "Describes either the current operation (if the pool AllocationState is Resizing) or the previously completed operation (if the AllocationState is Steady)."]
     #[serde(rename = "resizeOperationStatus", default, skip_serializing_if = "Option::is_none")]
     pub resize_operation_status: Option<ResizeOperationStatus>,
     #[doc = "This supports Azure Files, NFS, CIFS/SMB, and Blobfuse."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl PoolProperties {
@@ -1638,9 +1748,19 @@ pub struct PrivateLinkResourceProperties {
     #[doc = "The group id is used to establish the private link connection."]
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1700,7 +1820,12 @@ pub struct PublicIpAddressConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub provision: Option<IpAddressProvisioningType>,
     #[doc = "The number of IPs specified here limits the maximum size of the Pool - 100 dedicated nodes or 100 low-priority nodes can be allocated for each public IP. For example, a pool needing 250 dedicated VMs would need at least 3 public IPs specified. Each element of this collection is of the form: /subscriptions/{subscription}/resourceGroups/{group}/providers/Microsoft.Network/publicIPAddresses/{ip}."]
-    #[serde(rename = "ipAddressIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddressIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_address_ids: Vec<String>,
 }
 impl PublicIpAddressConfiguration {
@@ -1725,7 +1850,11 @@ pub struct ResizeError {
     pub code: String,
     #[doc = "A message describing the error, intended to be suitable for display in a user interface."]
     pub message: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ResizeError>,
 }
 impl ResizeError {
@@ -1752,7 +1881,11 @@ pub struct ResizeOperationStatus {
     #[serde(rename = "startTime", default, with = "azure_core::date::rfc3339::option")]
     pub start_time: Option<time::OffsetDateTime>,
     #[doc = "This property is set only if an error occurred during the last pool resize, and only when the pool allocationState is Steady."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ResizeError>,
 }
 impl ResizeOperationStatus {
@@ -1829,9 +1962,19 @@ pub struct StartTask {
     #[doc = "The command line does not run under a shell, and therefore cannot take advantage of shell features such as environment variable expansion. If you want to take advantage of such features, you should invoke the shell in the command line, for example using \"cmd /c MyCommand\" in Windows or \"/bin/sh -c MyCommand\" in Linux. Required if any other properties of the startTask are specified."]
     #[serde(rename = "commandLine", default, skip_serializing_if = "Option::is_none")]
     pub command_line: Option<String>,
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[doc = "Specify either the userName or autoUser property, but not both."]
     #[serde(rename = "userIdentity", default, skip_serializing_if = "Option::is_none")]
@@ -1959,7 +2102,12 @@ pub struct VmExtension {
     #[serde(rename = "protectedSettings", default, skip_serializing_if = "Option::is_none")]
     pub protected_settings: Option<serde_json::Value>,
     #[doc = "Collection of extension names after which this extension needs to be provisioned."]
-    #[serde(rename = "provisionAfterExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisionAfterExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provision_after_extensions: Vec<String>,
 }
 impl VmExtension {
@@ -1986,7 +2134,12 @@ pub struct VirtualMachineConfiguration {
     #[serde(rename = "windowsConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub windows_configuration: Option<WindowsConfiguration>,
     #[doc = "This property must be specified if the compute nodes in the pool need to have empty data disks attached to them."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
     #[doc = "This only applies to images that contain the Windows operating system, and should only be used when you hold valid on-premises licenses for the nodes which will be deployed. If omitted, no on-premises licensing discount is applied. Values are:\n\n Windows_Server - The on-premises license is for Windows Server.\n Windows_Client - The on-premises license is for Windows Client.\n"]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -2000,7 +2153,11 @@ pub struct VirtualMachineConfiguration {
     #[serde(rename = "nodePlacementConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub node_placement_configuration: Option<NodePlacementConfiguration>,
     #[doc = "If specified, the extensions mentioned in this configuration will be installed on each node."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VmExtension>,
 }
 impl VirtualMachineConfiguration {
diff --git a/services/mgmt/batch/src/package_2021_06/models.rs b/services/mgmt/batch/src/package_2021_06/models.rs
index fdbf6e5bc3..c65df632d7 100644
--- a/services/mgmt/batch/src/package_2021_06/models.rs
+++ b/services/mgmt/batch/src/package_2021_06/models.rs
@@ -138,7 +138,11 @@ pub struct AutoScaleRunError {
     pub code: String,
     #[doc = "A message describing the error, intended to be suitable for display in a user interface."]
     pub message: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<AutoScaleRunError>,
 }
 impl AutoScaleRunError {
@@ -363,7 +367,12 @@ pub struct BatchAccountCreateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionProperties>,
     #[doc = "List of allowed authentication modes for the Batch account that can be used to authenticate with the data plane. This does not affect authentication with the control plane."]
-    #[serde(rename = "allowedAuthenticationModes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAuthenticationModes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_authentication_modes: Vec<AuthenticationMode>,
 }
 impl BatchAccountCreateProperties {
@@ -429,7 +438,11 @@ impl BatchAccountKeys {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BatchAccountListResult {
     #[doc = "The collection of Batch accounts returned by the listing operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BatchAccount>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -465,7 +478,12 @@ pub struct BatchAccountProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<PublicNetworkAccessType>,
     #[doc = "List of private endpoint connections associated with the Batch account"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Contains information about the auto-storage account associated with a Batch account."]
     #[serde(rename = "autoStorage", default, skip_serializing_if = "Option::is_none")]
@@ -480,7 +498,12 @@ pub struct BatchAccountProperties {
     #[serde(rename = "lowPriorityCoreQuota", default, skip_serializing_if = "Option::is_none")]
     pub low_priority_core_quota: Option<i32>,
     #[doc = "A list of the dedicated core quota per Virtual Machine family for the Batch account. For accounts with PoolAllocationMode set to UserSubscription, quota is managed on the subscription so this value is not returned."]
-    #[serde(rename = "dedicatedCoreQuotaPerVMFamily", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dedicatedCoreQuotaPerVMFamily",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dedicated_core_quota_per_vm_family: Vec<VirtualMachineFamilyCoreQuota>,
     #[doc = "Batch is transitioning its core quota system for dedicated cores to be enforced per Virtual Machine family. During this transitional phase, the dedicated core quota per Virtual Machine family may not yet be enforced. If this flag is false, dedicated core quota is enforced via the old dedicatedCoreQuota property on the account and does not consider Virtual Machine family. If this flag is true, dedicated core quota is enforced via the dedicatedCoreQuotaPerVMFamily property on the account, and the old dedicatedCoreQuota does not apply."]
     #[serde(rename = "dedicatedCoreQuotaPerVMFamilyEnforced", default, skip_serializing_if = "Option::is_none")]
@@ -490,7 +513,12 @@ pub struct BatchAccountProperties {
     #[serde(rename = "activeJobAndJobScheduleQuota", default, skip_serializing_if = "Option::is_none")]
     pub active_job_and_job_schedule_quota: Option<i32>,
     #[doc = "List of allowed authentication modes for the Batch account that can be used to authenticate with the data plane. This does not affect authentication with the control plane."]
-    #[serde(rename = "allowedAuthenticationModes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAuthenticationModes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_authentication_modes: Vec<AuthenticationMode>,
 }
 impl BatchAccountProperties {
@@ -560,7 +588,12 @@ pub struct BatchAccountUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionProperties>,
     #[doc = "List of allowed authentication modes for the Batch account that can be used to authenticate with the data plane. This does not affect authentication with the control plane."]
-    #[serde(rename = "allowedAuthenticationModes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAuthenticationModes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_authentication_modes: Vec<AuthenticationMode>,
 }
 impl BatchAccountUpdateProperties {
@@ -766,7 +799,11 @@ pub struct CertificateReference {
     #[doc = "This property is applicable only for pools configured with Windows nodes (that is, created with cloudServiceConfiguration, or with virtualMachineConfiguration using a Windows image reference). Common store names include: My, Root, CA, Trust, Disallowed, TrustedPeople, TrustedPublisher, AuthRoot, AddressBook, but any custom store name can also be used. The default value is My."]
     #[serde(rename = "storeName", default, skip_serializing_if = "Option::is_none")]
     pub store_name: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub visibility: Vec<String>,
 }
 impl CertificateReference {
@@ -869,7 +906,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -918,10 +959,20 @@ pub struct ContainerConfiguration {
     #[serde(rename = "type")]
     pub type_: container_configuration::Type,
     #[doc = "This is the full image reference, as would be specified to \"docker pull\". An image will be sourced from the default Docker registry unless the image is fully qualified with an alternative registry."]
-    #[serde(rename = "containerImageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerImageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_image_names: Vec<String>,
     #[doc = "If any images must be downloaded from a private registry which requires credentials, then those credentials must be provided here."]
-    #[serde(rename = "containerRegistries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerRegistries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_registries: Vec<ContainerRegistry>,
 }
 impl ContainerConfiguration {
@@ -991,7 +1042,11 @@ pub struct DeleteCertificateError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<DeleteCertificateError>,
 }
 impl DeleteCertificateError {
@@ -1036,7 +1091,11 @@ impl DiffDiskSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskEncryptionConfiguration {
     #[doc = "On Linux pool, only \"TemporaryDisk\" is supported; on Windows pool, \"OsDisk\" and \"TemporaryDisk\" must be specified."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<String>,
 }
 impl DiskEncryptionConfiguration {
@@ -1085,7 +1144,12 @@ pub struct EndpointDependency {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of connection details for this endpoint."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -1180,7 +1244,12 @@ pub struct InboundNatPool {
     #[serde(rename = "frontendPortRangeEnd")]
     pub frontend_port_range_end: i32,
     #[doc = "The maximum number of rules that can be specified across all the endpoints on a Batch pool is 25. If no network security group rules are specified, a default rule will be created to allow inbound access to the specified backendPort. If the maximum number of network security group rules is exceeded the request fails with HTTP status code 400."]
-    #[serde(rename = "networkSecurityGroupRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityGroupRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_group_rules: Vec<NetworkSecurityGroupRule>,
 }
 impl InboundNatPool {
@@ -1257,7 +1326,11 @@ impl LinuxUserConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListApplicationPackagesResult {
     #[doc = "The list of application packages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationPackage>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1278,7 +1351,11 @@ impl ListApplicationPackagesResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListApplicationsResult {
     #[doc = "The list of applications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1299,7 +1376,11 @@ impl ListApplicationsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListCertificatesResult {
     #[doc = "The collection of returned certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Certificate>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1320,7 +1401,11 @@ impl ListCertificatesResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPoolsResult {
     #[doc = "The collection of returned pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Pool>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1341,7 +1426,11 @@ impl ListPoolsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPrivateEndpointConnectionsResult {
     #[doc = "The collection of returned private endpoint connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1362,7 +1451,11 @@ impl ListPrivateEndpointConnectionsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPrivateLinkResourcesResult {
     #[doc = "The collection of returned private link resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1451,7 +1544,12 @@ pub struct NetworkSecurityGroupRule {
     #[serde(rename = "sourceAddressPrefix")]
     pub source_address_prefix: String,
     #[doc = "Valid values are '*' (for all ports 0 - 65535) or arrays of ports or port ranges (i.e. 100-200). The ports should in the range of 0 to 65535 and the port ranges or ports can't overlap. If any other values are provided the request fails with HTTP status code 400. Default value will be *."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
 }
 impl NetworkSecurityGroupRule {
@@ -1542,7 +1640,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1565,7 +1667,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints for this service to which the Batch service makes outbound calls."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -1577,7 +1683,11 @@ impl OutboundEnvironmentEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OutboundEnvironmentEndpointCollection {
     #[doc = "The collection of outbound network dependency endpoints returned by the listing operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OutboundEnvironmentEndpoint>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1672,28 +1782,56 @@ pub struct PoolProperties {
     pub task_slots_per_node: Option<i32>,
     #[serde(rename = "taskSchedulingPolicy", default, skip_serializing_if = "Option::is_none")]
     pub task_scheduling_policy: Option<TaskSchedulingPolicy>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[doc = "In some cases the start task may be re-run even though the node was not rebooted. Due to this, start tasks should be idempotent and exit gracefully if the setup they're performing has already been done. Special care should be taken to avoid start tasks which create breakaway process or install/launch services from the start task working directory, as this will block Batch from being able to re-run the start task."]
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows compute nodes, the Batch service installs the certificates to the specified certificate store and location. For Linux compute nodes, the certificates are stored in a directory inside the task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the task to query for this location. For certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and certificates are placed in that directory."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<CertificateReference>,
     #[doc = "Changes to application package references affect all new compute nodes joining the pool, but do not affect compute nodes that are already in the pool until they are rebooted or reimaged. There is a maximum of 10 application package references on any given pool."]
-    #[serde(rename = "applicationPackages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_packages: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, pool creation will fail."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
     #[doc = "Describes either the current operation (if the pool AllocationState is Resizing) or the previously completed operation (if the AllocationState is Steady)."]
     #[serde(rename = "resizeOperationStatus", default, skip_serializing_if = "Option::is_none")]
     pub resize_operation_status: Option<ResizeOperationStatus>,
     #[doc = "This supports Azure Files, NFS, CIFS/SMB, and Blobfuse."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl PoolProperties {
@@ -1792,9 +1930,19 @@ pub struct PrivateLinkResourceProperties {
     #[doc = "The group id is used to establish the private link connection."]
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1854,7 +2002,12 @@ pub struct PublicIpAddressConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub provision: Option<IpAddressProvisioningType>,
     #[doc = "The number of IPs specified here limits the maximum size of the Pool - 100 dedicated nodes or 100 low-priority nodes can be allocated for each public IP. For example, a pool needing 250 dedicated VMs would need at least 3 public IPs specified. Each element of this collection is of the form: /subscriptions/{subscription}/resourceGroups/{group}/providers/Microsoft.Network/publicIPAddresses/{ip}."]
-    #[serde(rename = "ipAddressIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddressIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_address_ids: Vec<String>,
 }
 impl PublicIpAddressConfiguration {
@@ -1879,7 +2032,11 @@ pub struct ResizeError {
     pub code: String,
     #[doc = "A message describing the error, intended to be suitable for display in a user interface."]
     pub message: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ResizeError>,
 }
 impl ResizeError {
@@ -1906,7 +2063,11 @@ pub struct ResizeOperationStatus {
     #[serde(rename = "startTime", default, with = "azure_core::date::rfc3339::option")]
     pub start_time: Option<time::OffsetDateTime>,
     #[doc = "This property is set only if an error occurred during the last pool resize, and only when the pool allocationState is Steady."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ResizeError>,
 }
 impl ResizeOperationStatus {
@@ -2001,9 +2162,19 @@ pub struct StartTask {
     #[doc = "The command line does not run under a shell, and therefore cannot take advantage of shell features such as environment variable expansion. If you want to take advantage of such features, you should invoke the shell in the command line, for example using \"cmd /c MyCommand\" in Windows or \"/bin/sh -c MyCommand\" in Linux. Required if any other properties of the startTask are specified."]
     #[serde(rename = "commandLine", default, skip_serializing_if = "Option::is_none")]
     pub command_line: Option<String>,
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[doc = "Specify either the userName or autoUser property, but not both."]
     #[serde(rename = "userIdentity", default, skip_serializing_if = "Option::is_none")]
@@ -2039,7 +2210,11 @@ pub struct SupportedSku {
     #[serde(rename = "familyName", default, skip_serializing_if = "Option::is_none")]
     pub family_name: Option<String>,
     #[doc = "A collection of capabilities which this SKU supports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl SupportedSku {
@@ -2184,7 +2359,12 @@ pub struct VmExtension {
     #[serde(rename = "protectedSettings", default, skip_serializing_if = "Option::is_none")]
     pub protected_settings: Option<serde_json::Value>,
     #[doc = "Collection of extension names after which this extension needs to be provisioned."]
-    #[serde(rename = "provisionAfterExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisionAfterExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provision_after_extensions: Vec<String>,
 }
 impl VmExtension {
@@ -2211,7 +2391,12 @@ pub struct VirtualMachineConfiguration {
     #[serde(rename = "windowsConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub windows_configuration: Option<WindowsConfiguration>,
     #[doc = "This property must be specified if the compute nodes in the pool need to have empty data disks attached to them."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
     #[doc = "This only applies to images that contain the Windows operating system, and should only be used when you hold valid on-premises licenses for the nodes which will be deployed. If omitted, no on-premises licensing discount is applied. Values are:\n\n Windows_Server - The on-premises license is for Windows Server.\n Windows_Client - The on-premises license is for Windows Client.\n"]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -2225,7 +2410,11 @@ pub struct VirtualMachineConfiguration {
     #[serde(rename = "nodePlacementConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub node_placement_configuration: Option<NodePlacementConfiguration>,
     #[doc = "If specified, the extensions mentioned in this configuration will be installed on each node."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VmExtension>,
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
diff --git a/services/mgmt/batch/src/package_2022_01/models.rs b/services/mgmt/batch/src/package_2022_01/models.rs
index 3b984e1525..4788212081 100644
--- a/services/mgmt/batch/src/package_2022_01/models.rs
+++ b/services/mgmt/batch/src/package_2022_01/models.rs
@@ -138,7 +138,11 @@ pub struct AutoScaleRunError {
     pub code: String,
     #[doc = "A message describing the error, intended to be suitable for display in a user interface."]
     pub message: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<AutoScaleRunError>,
 }
 impl AutoScaleRunError {
@@ -363,7 +367,12 @@ pub struct BatchAccountCreateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionProperties>,
     #[doc = "List of allowed authentication modes for the Batch account that can be used to authenticate with the data plane. This does not affect authentication with the control plane."]
-    #[serde(rename = "allowedAuthenticationModes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAuthenticationModes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_authentication_modes: Vec<AuthenticationMode>,
 }
 impl BatchAccountCreateProperties {
@@ -429,7 +438,11 @@ impl BatchAccountKeys {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BatchAccountListResult {
     #[doc = "The collection of Batch accounts returned by the listing operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BatchAccount>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -465,7 +478,12 @@ pub struct BatchAccountProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<PublicNetworkAccessType>,
     #[doc = "List of private endpoint connections associated with the Batch account"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Contains information about the auto-storage account associated with a Batch account."]
     #[serde(rename = "autoStorage", default, skip_serializing_if = "Option::is_none")]
@@ -480,7 +498,12 @@ pub struct BatchAccountProperties {
     #[serde(rename = "lowPriorityCoreQuota", default, skip_serializing_if = "Option::is_none")]
     pub low_priority_core_quota: Option<i32>,
     #[doc = "A list of the dedicated core quota per Virtual Machine family for the Batch account. For accounts with PoolAllocationMode set to UserSubscription, quota is managed on the subscription so this value is not returned."]
-    #[serde(rename = "dedicatedCoreQuotaPerVMFamily", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dedicatedCoreQuotaPerVMFamily",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dedicated_core_quota_per_vm_family: Vec<VirtualMachineFamilyCoreQuota>,
     #[doc = "Batch is transitioning its core quota system for dedicated cores to be enforced per Virtual Machine family. During this transitional phase, the dedicated core quota per Virtual Machine family may not yet be enforced. If this flag is false, dedicated core quota is enforced via the old dedicatedCoreQuota property on the account and does not consider Virtual Machine family. If this flag is true, dedicated core quota is enforced via the dedicatedCoreQuotaPerVMFamily property on the account, and the old dedicatedCoreQuota does not apply."]
     #[serde(rename = "dedicatedCoreQuotaPerVMFamilyEnforced", default, skip_serializing_if = "Option::is_none")]
@@ -490,7 +513,12 @@ pub struct BatchAccountProperties {
     #[serde(rename = "activeJobAndJobScheduleQuota", default, skip_serializing_if = "Option::is_none")]
     pub active_job_and_job_schedule_quota: Option<i32>,
     #[doc = "List of allowed authentication modes for the Batch account that can be used to authenticate with the data plane. This does not affect authentication with the control plane."]
-    #[serde(rename = "allowedAuthenticationModes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAuthenticationModes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_authentication_modes: Vec<AuthenticationMode>,
 }
 impl BatchAccountProperties {
@@ -560,7 +588,12 @@ pub struct BatchAccountUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionProperties>,
     #[doc = "List of allowed authentication modes for the Batch account that can be used to authenticate with the data plane. This does not affect authentication with the control plane."]
-    #[serde(rename = "allowedAuthenticationModes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAuthenticationModes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_authentication_modes: Vec<AuthenticationMode>,
 }
 impl BatchAccountUpdateProperties {
@@ -766,7 +799,11 @@ pub struct CertificateReference {
     #[doc = "This property is applicable only for pools configured with Windows nodes (that is, created with cloudServiceConfiguration, or with virtualMachineConfiguration using a Windows image reference). Common store names include: My, Root, CA, Trust, Disallowed, TrustedPeople, TrustedPublisher, AuthRoot, AddressBook, but any custom store name can also be used. The default value is My."]
     #[serde(rename = "storeName", default, skip_serializing_if = "Option::is_none")]
     pub store_name: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub visibility: Vec<String>,
 }
 impl CertificateReference {
@@ -869,7 +906,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -918,10 +959,20 @@ pub struct ContainerConfiguration {
     #[serde(rename = "type")]
     pub type_: container_configuration::Type,
     #[doc = "This is the full image reference, as would be specified to \"docker pull\". An image will be sourced from the default Docker registry unless the image is fully qualified with an alternative registry."]
-    #[serde(rename = "containerImageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerImageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_image_names: Vec<String>,
     #[doc = "If any images must be downloaded from a private registry which requires credentials, then those credentials must be provided here."]
-    #[serde(rename = "containerRegistries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerRegistries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_registries: Vec<ContainerRegistry>,
 }
 impl ContainerConfiguration {
@@ -991,7 +1042,11 @@ pub struct DeleteCertificateError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<DeleteCertificateError>,
 }
 impl DeleteCertificateError {
@@ -1020,7 +1075,11 @@ impl DeploymentConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DetectorListResult {
     #[doc = "The collection of Batch account detectors returned by the listing operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DetectorResponse>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1083,7 +1142,11 @@ impl DiffDiskSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskEncryptionConfiguration {
     #[doc = "On Linux pool, only \"TemporaryDisk\" is supported; on Windows pool, \"OsDisk\" and \"TemporaryDisk\" must be specified."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<String>,
 }
 impl DiskEncryptionConfiguration {
@@ -1132,7 +1195,12 @@ pub struct EndpointDependency {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of connection details for this endpoint."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -1227,7 +1295,12 @@ pub struct InboundNatPool {
     #[serde(rename = "frontendPortRangeEnd")]
     pub frontend_port_range_end: i32,
     #[doc = "The maximum number of rules that can be specified across all the endpoints on a Batch pool is 25. If no network security group rules are specified, a default rule will be created to allow inbound access to the specified backendPort. If the maximum number of network security group rules is exceeded the request fails with HTTP status code 400."]
-    #[serde(rename = "networkSecurityGroupRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityGroupRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_group_rules: Vec<NetworkSecurityGroupRule>,
 }
 impl InboundNatPool {
@@ -1304,7 +1377,11 @@ impl LinuxUserConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListApplicationPackagesResult {
     #[doc = "The list of application packages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationPackage>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1325,7 +1402,11 @@ impl ListApplicationPackagesResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListApplicationsResult {
     #[doc = "The list of applications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1346,7 +1427,11 @@ impl ListApplicationsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListCertificatesResult {
     #[doc = "The collection of returned certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Certificate>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1367,7 +1452,11 @@ impl ListCertificatesResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPoolsResult {
     #[doc = "The collection of returned pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Pool>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1388,7 +1477,11 @@ impl ListPoolsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPrivateEndpointConnectionsResult {
     #[doc = "The collection of returned private endpoint connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1409,7 +1502,11 @@ impl ListPrivateEndpointConnectionsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPrivateLinkResourcesResult {
     #[doc = "The collection of returned private link resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1510,7 +1607,12 @@ pub struct NetworkSecurityGroupRule {
     #[serde(rename = "sourceAddressPrefix")]
     pub source_address_prefix: String,
     #[doc = "Valid values are '*' (for all ports 0 - 65535) or arrays of ports or port ranges (i.e. 100-200). The ports should in the range of 0 to 65535 and the port ranges or ports can't overlap. If any other values are provided the request fails with HTTP status code 400. Default value will be *."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
 }
 impl NetworkSecurityGroupRule {
@@ -1601,7 +1703,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1624,7 +1730,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints for this service to which the Batch service makes outbound calls."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -1636,7 +1746,11 @@ impl OutboundEnvironmentEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OutboundEnvironmentEndpointCollection {
     #[doc = "The collection of outbound network dependency endpoints returned by the listing operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OutboundEnvironmentEndpoint>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1731,28 +1845,56 @@ pub struct PoolProperties {
     pub task_slots_per_node: Option<i32>,
     #[serde(rename = "taskSchedulingPolicy", default, skip_serializing_if = "Option::is_none")]
     pub task_scheduling_policy: Option<TaskSchedulingPolicy>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[doc = "In some cases the start task may be re-run even though the node was not rebooted. Due to this, start tasks should be idempotent and exit gracefully if the setup they're performing has already been done. Special care should be taken to avoid start tasks which create breakaway process or install/launch services from the start task working directory, as this will block Batch from being able to re-run the start task."]
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows compute nodes, the Batch service installs the certificates to the specified certificate store and location. For Linux compute nodes, the certificates are stored in a directory inside the task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the task to query for this location. For certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and certificates are placed in that directory."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<CertificateReference>,
     #[doc = "Changes to application package references affect all new compute nodes joining the pool, but do not affect compute nodes that are already in the pool until they are rebooted or reimaged. There is a maximum of 10 application package references on any given pool."]
-    #[serde(rename = "applicationPackages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_packages: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, pool creation will fail."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
     #[doc = "Describes either the current operation (if the pool AllocationState is Resizing) or the previously completed operation (if the AllocationState is Steady)."]
     #[serde(rename = "resizeOperationStatus", default, skip_serializing_if = "Option::is_none")]
     pub resize_operation_status: Option<ResizeOperationStatus>,
     #[doc = "This supports Azure Files, NFS, CIFS/SMB, and Blobfuse."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl PoolProperties {
@@ -1851,9 +1993,19 @@ pub struct PrivateLinkResourceProperties {
     #[doc = "The group id is used to establish the private link connection."]
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1913,7 +2065,12 @@ pub struct PublicIpAddressConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub provision: Option<IpAddressProvisioningType>,
     #[doc = "The number of IPs specified here limits the maximum size of the Pool - 100 dedicated nodes or 100 Spot/low-priority nodes can be allocated for each public IP. For example, a pool needing 250 dedicated VMs would need at least 3 public IPs specified. Each element of this collection is of the form: /subscriptions/{subscription}/resourceGroups/{group}/providers/Microsoft.Network/publicIPAddresses/{ip}."]
-    #[serde(rename = "ipAddressIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddressIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_address_ids: Vec<String>,
 }
 impl PublicIpAddressConfiguration {
@@ -1938,7 +2095,11 @@ pub struct ResizeError {
     pub code: String,
     #[doc = "A message describing the error, intended to be suitable for display in a user interface."]
     pub message: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ResizeError>,
 }
 impl ResizeError {
@@ -1965,7 +2126,11 @@ pub struct ResizeOperationStatus {
     #[serde(rename = "startTime", default, with = "azure_core::date::rfc3339::option")]
     pub start_time: Option<time::OffsetDateTime>,
     #[doc = "This property is set only if an error occurred during the last pool resize, and only when the pool allocationState is Steady."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ResizeError>,
 }
 impl ResizeOperationStatus {
@@ -2060,9 +2225,19 @@ pub struct StartTask {
     #[doc = "The command line does not run under a shell, and therefore cannot take advantage of shell features such as environment variable expansion. If you want to take advantage of such features, you should invoke the shell in the command line, for example using \"cmd /c MyCommand\" in Windows or \"/bin/sh -c MyCommand\" in Linux. Required if any other properties of the startTask are specified."]
     #[serde(rename = "commandLine", default, skip_serializing_if = "Option::is_none")]
     pub command_line: Option<String>,
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[doc = "Specify either the userName or autoUser property, but not both."]
     #[serde(rename = "userIdentity", default, skip_serializing_if = "Option::is_none")]
@@ -2098,7 +2273,11 @@ pub struct SupportedSku {
     #[serde(rename = "familyName", default, skip_serializing_if = "Option::is_none")]
     pub family_name: Option<String>,
     #[doc = "A collection of capabilities which this SKU supports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl SupportedSku {
@@ -2243,7 +2422,12 @@ pub struct VmExtension {
     #[serde(rename = "protectedSettings", default, skip_serializing_if = "Option::is_none")]
     pub protected_settings: Option<serde_json::Value>,
     #[doc = "Collection of extension names after which this extension needs to be provisioned."]
-    #[serde(rename = "provisionAfterExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisionAfterExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provision_after_extensions: Vec<String>,
 }
 impl VmExtension {
@@ -2270,7 +2454,12 @@ pub struct VirtualMachineConfiguration {
     #[serde(rename = "windowsConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub windows_configuration: Option<WindowsConfiguration>,
     #[doc = "This property must be specified if the compute nodes in the pool need to have empty data disks attached to them."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
     #[doc = "This only applies to images that contain the Windows operating system, and should only be used when you hold valid on-premises licenses for the nodes which will be deployed. If omitted, no on-premises licensing discount is applied. Values are:\n\n Windows_Server - The on-premises license is for Windows Server.\n Windows_Client - The on-premises license is for Windows Client.\n"]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -2284,7 +2473,11 @@ pub struct VirtualMachineConfiguration {
     #[serde(rename = "nodePlacementConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub node_placement_configuration: Option<NodePlacementConfiguration>,
     #[doc = "If specified, the extensions mentioned in this configuration will be installed on each node."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VmExtension>,
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
diff --git a/services/mgmt/batch/src/package_2022_06/models.rs b/services/mgmt/batch/src/package_2022_06/models.rs
index 01b7523d68..2357cfcaba 100644
--- a/services/mgmt/batch/src/package_2022_06/models.rs
+++ b/services/mgmt/batch/src/package_2022_06/models.rs
@@ -138,7 +138,11 @@ pub struct AutoScaleRunError {
     pub code: String,
     #[doc = "A message describing the error, intended to be suitable for display in a user interface."]
     pub message: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<AutoScaleRunError>,
 }
 impl AutoScaleRunError {
@@ -366,7 +370,12 @@ pub struct BatchAccountCreateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionProperties>,
     #[doc = "List of allowed authentication modes for the Batch account that can be used to authenticate with the data plane. This does not affect authentication with the control plane."]
-    #[serde(rename = "allowedAuthenticationModes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAuthenticationModes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_authentication_modes: Vec<AuthenticationMode>,
 }
 impl BatchAccountCreateProperties {
@@ -432,7 +441,11 @@ impl BatchAccountKeys {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BatchAccountListResult {
     #[doc = "The collection of Batch accounts returned by the listing operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BatchAccount>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -474,7 +487,12 @@ pub struct BatchAccountProperties {
     #[serde(rename = "networkProfile", default, skip_serializing_if = "Option::is_none")]
     pub network_profile: Option<NetworkProfile>,
     #[doc = "List of private endpoint connections associated with the Batch account"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Contains information about the auto-storage account associated with a Batch account."]
     #[serde(rename = "autoStorage", default, skip_serializing_if = "Option::is_none")]
@@ -489,7 +507,12 @@ pub struct BatchAccountProperties {
     #[serde(rename = "lowPriorityCoreQuota", default, skip_serializing_if = "Option::is_none")]
     pub low_priority_core_quota: Option<i32>,
     #[doc = "A list of the dedicated core quota per Virtual Machine family for the Batch account. For accounts with PoolAllocationMode set to UserSubscription, quota is managed on the subscription so this value is not returned."]
-    #[serde(rename = "dedicatedCoreQuotaPerVMFamily", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dedicatedCoreQuotaPerVMFamily",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dedicated_core_quota_per_vm_family: Vec<VirtualMachineFamilyCoreQuota>,
     #[doc = "If this flag is true, dedicated core quota is enforced via both the dedicatedCoreQuotaPerVMFamily and dedicatedCoreQuota properties on the account. If this flag is false, dedicated core quota is enforced only via the dedicatedCoreQuota property on the account and does not consider Virtual Machine family."]
     #[serde(rename = "dedicatedCoreQuotaPerVMFamilyEnforced", default, skip_serializing_if = "Option::is_none")]
@@ -499,7 +522,12 @@ pub struct BatchAccountProperties {
     #[serde(rename = "activeJobAndJobScheduleQuota", default, skip_serializing_if = "Option::is_none")]
     pub active_job_and_job_schedule_quota: Option<i32>,
     #[doc = "List of allowed authentication modes for the Batch account that can be used to authenticate with the data plane. This does not affect authentication with the control plane."]
-    #[serde(rename = "allowedAuthenticationModes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAuthenticationModes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_authentication_modes: Vec<AuthenticationMode>,
 }
 impl BatchAccountProperties {
@@ -569,7 +597,12 @@ pub struct BatchAccountUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionProperties>,
     #[doc = "List of allowed authentication modes for the Batch account that can be used to authenticate with the data plane. This does not affect authentication with the control plane."]
-    #[serde(rename = "allowedAuthenticationModes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAuthenticationModes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_authentication_modes: Vec<AuthenticationMode>,
     #[doc = "The network access type for operating on the resources in the Batch account."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -781,7 +814,11 @@ pub struct CertificateReference {
     #[doc = "This property is applicable only for pools configured with Windows nodes (that is, created with cloudServiceConfiguration, or with virtualMachineConfiguration using a Windows image reference). Common store names include: My, Root, CA, Trust, Disallowed, TrustedPeople, TrustedPublisher, AuthRoot, AddressBook, but any custom store name can also be used. The default value is My."]
     #[serde(rename = "storeName", default, skip_serializing_if = "Option::is_none")]
     pub store_name: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub visibility: Vec<String>,
 }
 impl CertificateReference {
@@ -884,7 +921,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -933,10 +974,20 @@ pub struct ContainerConfiguration {
     #[serde(rename = "type")]
     pub type_: container_configuration::Type,
     #[doc = "This is the full image reference, as would be specified to \"docker pull\". An image will be sourced from the default Docker registry unless the image is fully qualified with an alternative registry."]
-    #[serde(rename = "containerImageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerImageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_image_names: Vec<String>,
     #[doc = "If any images must be downloaded from a private registry which requires credentials, then those credentials must be provided here."]
-    #[serde(rename = "containerRegistries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerRegistries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_registries: Vec<ContainerRegistry>,
 }
 impl ContainerConfiguration {
@@ -1006,7 +1057,11 @@ pub struct DeleteCertificateError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<DeleteCertificateError>,
 }
 impl DeleteCertificateError {
@@ -1035,7 +1090,11 @@ impl DeploymentConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DetectorListResult {
     #[doc = "The collection of Batch account detectors returned by the listing operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DetectorResponse>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1098,7 +1157,11 @@ impl DiffDiskSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskEncryptionConfiguration {
     #[doc = "On Linux pool, only \"TemporaryDisk\" is supported; on Windows pool, \"OsDisk\" and \"TemporaryDisk\" must be specified."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<String>,
 }
 impl DiskEncryptionConfiguration {
@@ -1144,7 +1207,12 @@ pub struct EndpointAccessProfile {
     #[serde(rename = "defaultAction")]
     pub default_action: endpoint_access_profile::DefaultAction,
     #[doc = "Array of IP ranges to filter client IP address."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
 }
 impl EndpointAccessProfile {
@@ -1174,7 +1242,12 @@ pub struct EndpointDependency {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of connection details for this endpoint."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -1290,7 +1363,12 @@ pub struct InboundNatPool {
     #[serde(rename = "frontendPortRangeEnd")]
     pub frontend_port_range_end: i32,
     #[doc = "The maximum number of rules that can be specified across all the endpoints on a Batch pool is 25. If no network security group rules are specified, a default rule will be created to allow inbound access to the specified backendPort. If the maximum number of network security group rules is exceeded the request fails with HTTP status code 400."]
-    #[serde(rename = "networkSecurityGroupRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityGroupRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_group_rules: Vec<NetworkSecurityGroupRule>,
 }
 impl InboundNatPool {
@@ -1367,7 +1445,11 @@ impl LinuxUserConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListApplicationPackagesResult {
     #[doc = "The list of application packages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationPackage>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1388,7 +1470,11 @@ impl ListApplicationPackagesResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListApplicationsResult {
     #[doc = "The list of applications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1409,7 +1495,11 @@ impl ListApplicationsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListCertificatesResult {
     #[doc = "The collection of returned certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Certificate>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1430,7 +1520,11 @@ impl ListCertificatesResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPoolsResult {
     #[doc = "The collection of returned pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Pool>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1451,7 +1545,11 @@ impl ListPoolsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPrivateEndpointConnectionsResult {
     #[doc = "The collection of returned private endpoint connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1472,7 +1570,11 @@ impl ListPrivateEndpointConnectionsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPrivateLinkResourcesResult {
     #[doc = "The collection of returned private link resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1588,7 +1690,12 @@ pub struct NetworkSecurityGroupRule {
     #[serde(rename = "sourceAddressPrefix")]
     pub source_address_prefix: String,
     #[doc = "Valid values are '*' (for all ports 0 - 65535) or arrays of ports or port ranges (i.e. 100-200). The ports should in the range of 0 to 65535 and the port ranges or ports can't overlap. If any other values are provided the request fails with HTTP status code 400. Default value will be *."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
 }
 impl NetworkSecurityGroupRule {
@@ -1679,7 +1786,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1702,7 +1813,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints for this service to which the Batch service makes outbound calls."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -1714,7 +1829,11 @@ impl OutboundEnvironmentEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OutboundEnvironmentEndpointCollection {
     #[doc = "The collection of outbound network dependency endpoints returned by the listing operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OutboundEnvironmentEndpoint>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1809,28 +1928,56 @@ pub struct PoolProperties {
     pub task_slots_per_node: Option<i32>,
     #[serde(rename = "taskSchedulingPolicy", default, skip_serializing_if = "Option::is_none")]
     pub task_scheduling_policy: Option<TaskSchedulingPolicy>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[doc = "In some cases the start task may be re-run even though the node was not rebooted. Due to this, start tasks should be idempotent and exit gracefully if the setup they're performing has already been done. Special care should be taken to avoid start tasks which create breakaway process or install/launch services from the start task working directory, as this will block Batch from being able to re-run the start task."]
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows compute nodes, the Batch service installs the certificates to the specified certificate store and location. For Linux compute nodes, the certificates are stored in a directory inside the task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the task to query for this location. For certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and certificates are placed in that directory."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<CertificateReference>,
     #[doc = "Changes to application package references affect all new compute nodes joining the pool, but do not affect compute nodes that are already in the pool until they are rebooted or reimaged. There is a maximum of 10 application package references on any given pool."]
-    #[serde(rename = "applicationPackages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_packages: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, pool creation will fail."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
     #[doc = "Describes either the current operation (if the pool AllocationState is Resizing) or the previously completed operation (if the AllocationState is Steady)."]
     #[serde(rename = "resizeOperationStatus", default, skip_serializing_if = "Option::is_none")]
     pub resize_operation_status: Option<ResizeOperationStatus>,
     #[doc = "This supports Azure Files, NFS, CIFS/SMB, and Blobfuse."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl PoolProperties {
@@ -1892,7 +2039,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "privateEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub private_endpoint: Option<PrivateEndpoint>,
     #[doc = "The value has one and only one group id."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "The private link service connection state of the private endpoint connection"]
     #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
@@ -1935,9 +2087,19 @@ pub struct PrivateLinkResourceProperties {
     #[doc = "The group id is used to establish the private link connection."]
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1997,7 +2159,12 @@ pub struct PublicIpAddressConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub provision: Option<IpAddressProvisioningType>,
     #[doc = "The number of IPs specified here limits the maximum size of the Pool - 100 dedicated nodes or 100 Spot/low-priority nodes can be allocated for each public IP. For example, a pool needing 250 dedicated VMs would need at least 3 public IPs specified. Each element of this collection is of the form: /subscriptions/{subscription}/resourceGroups/{group}/providers/Microsoft.Network/publicIPAddresses/{ip}."]
-    #[serde(rename = "ipAddressIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddressIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_address_ids: Vec<String>,
 }
 impl PublicIpAddressConfiguration {
@@ -2022,7 +2189,11 @@ pub struct ResizeError {
     pub code: String,
     #[doc = "A message describing the error, intended to be suitable for display in a user interface."]
     pub message: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ResizeError>,
 }
 impl ResizeError {
@@ -2049,7 +2220,11 @@ pub struct ResizeOperationStatus {
     #[serde(rename = "startTime", default, with = "azure_core::date::rfc3339::option")]
     pub start_time: Option<time::OffsetDateTime>,
     #[doc = "This property is set only if an error occurred during the last pool resize, and only when the pool allocationState is Steady."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ResizeError>,
 }
 impl ResizeOperationStatus {
@@ -2144,9 +2319,19 @@ pub struct StartTask {
     #[doc = "The command line does not run under a shell, and therefore cannot take advantage of shell features such as environment variable expansion. If you want to take advantage of such features, you should invoke the shell in the command line, for example using \"cmd /c MyCommand\" in Windows or \"/bin/sh -c MyCommand\" in Linux. Required if any other properties of the startTask are specified."]
     #[serde(rename = "commandLine", default, skip_serializing_if = "Option::is_none")]
     pub command_line: Option<String>,
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[doc = "Specify either the userName or autoUser property, but not both."]
     #[serde(rename = "userIdentity", default, skip_serializing_if = "Option::is_none")]
@@ -2182,7 +2367,11 @@ pub struct SupportedSku {
     #[serde(rename = "familyName", default, skip_serializing_if = "Option::is_none")]
     pub family_name: Option<String>,
     #[doc = "A collection of capabilities which this SKU supports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl SupportedSku {
@@ -2327,7 +2516,12 @@ pub struct VmExtension {
     #[serde(rename = "protectedSettings", default, skip_serializing_if = "Option::is_none")]
     pub protected_settings: Option<serde_json::Value>,
     #[doc = "Collection of extension names after which this extension needs to be provisioned."]
-    #[serde(rename = "provisionAfterExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisionAfterExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provision_after_extensions: Vec<String>,
 }
 impl VmExtension {
@@ -2354,7 +2548,12 @@ pub struct VirtualMachineConfiguration {
     #[serde(rename = "windowsConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub windows_configuration: Option<WindowsConfiguration>,
     #[doc = "This property must be specified if the compute nodes in the pool need to have empty data disks attached to them."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
     #[doc = "This only applies to images that contain the Windows operating system, and should only be used when you hold valid on-premises licenses for the nodes which will be deployed. If omitted, no on-premises licensing discount is applied. Values are:\n\n Windows_Server - The on-premises license is for Windows Server.\n Windows_Client - The on-premises license is for Windows Client.\n"]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -2368,7 +2567,11 @@ pub struct VirtualMachineConfiguration {
     #[serde(rename = "nodePlacementConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub node_placement_configuration: Option<NodePlacementConfiguration>,
     #[doc = "If specified, the extensions mentioned in this configuration will be installed on each node."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VmExtension>,
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
diff --git a/services/mgmt/billing/src/package_2019_10_preview/models.rs b/services/mgmt/billing/src/package_2019_10_preview/models.rs
index b2881f7582..5a60f12d63 100644
--- a/services/mgmt/billing/src/package_2019_10_preview/models.rs
+++ b/services/mgmt/billing/src/package_2019_10_preview/models.rs
@@ -7,7 +7,12 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AcceptTransferProperties {
     #[doc = "Request parameters to accept transfer."]
-    #[serde(rename = "productDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "productDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub product_details: Vec<ProductDetails>,
 }
 impl AcceptTransferProperties {
@@ -122,7 +127,11 @@ impl Agreement {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgreementListResult {
     #[doc = "The list of agreements."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Agreement>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -152,7 +161,11 @@ pub struct AgreementProperties {
     #[serde(rename = "expirationDate", default, with = "azure_core::date::rfc3339::option")]
     pub expiration_date: Option<time::OffsetDateTime>,
     #[doc = "The list of participants that participates in acceptance of an agreement."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub participants: Vec<Participants>,
     #[doc = "The current status of the agreement."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -318,7 +331,11 @@ impl BillingAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingAccountListResult {
     #[doc = "The list of billing accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingAccount>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -348,16 +365,30 @@ pub struct BillingAccountProperties {
     #[serde(rename = "accountType", default, skip_serializing_if = "Option::is_none")]
     pub account_type: Option<billing_account_properties::AccountType>,
     #[doc = "The billing profiles associated with the billing account. By default this is not populated, unless it's specified in $expand."]
-    #[serde(rename = "billingProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "billingProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub billing_profiles: Vec<BillingProfile>,
     #[doc = "The properties of an enrollment."]
     #[serde(rename = "enrollmentDetails", default, skip_serializing_if = "Option::is_none")]
     pub enrollment_details: Option<Enrollment>,
     #[doc = "The departments associated to the enrollment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub departments: Vec<Department>,
     #[doc = "The accounts associated to the enrollment."]
-    #[serde(rename = "enrollmentAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enrollmentAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enrollment_accounts: Vec<EnrollmentAccount>,
     #[doc = "Organization id."]
     #[serde(rename = "organizationId", default, skip_serializing_if = "Option::is_none")]
@@ -508,7 +539,11 @@ impl BillingAccountUpdateRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingPermissionsListResult {
     #[doc = "The list of billingPermissions a caller has on a billing account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingPermissionsProperties>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -529,10 +564,19 @@ impl BillingPermissionsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingPermissionsProperties {
     #[doc = "The set of actions that the caller is allowed to perform."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<Action>,
     #[doc = "The set of actions that the caller is not allowed to perform."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<NotAction>,
 }
 impl BillingPermissionsProperties {
@@ -570,7 +614,12 @@ pub struct BillingProfileCreationRequest {
     #[serde(rename = "invoiceEmailOptIn", default, skip_serializing_if = "Option::is_none")]
     pub invoice_email_opt_in: Option<bool>,
     #[doc = "Enabled azure plans for the billing profile."]
-    #[serde(rename = "enabledAzurePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledAzurePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_azure_plans: Vec<AzurePlan>,
 }
 impl BillingProfileCreationRequest {
@@ -582,7 +631,11 @@ impl BillingProfileCreationRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingProfileListResult {
     #[doc = "The list of billing profiles."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingProfile>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -618,13 +671,23 @@ pub struct BillingProfileProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub currency: Option<String>,
     #[doc = "Information about the enabled azure plans."]
-    #[serde(rename = "enabledAzurePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledAzurePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_azure_plans: Vec<AzurePlan>,
     #[doc = "The billing profile details of the partner of the customer for an indirect motion."]
     #[serde(rename = "indirectRelationshipInfo", default, skip_serializing_if = "Option::is_none")]
     pub indirect_relationship_info: Option<IndirectRelationshipInfo>,
     #[doc = "The invoice sections associated to the billing profile."]
-    #[serde(rename = "invoiceSections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "invoiceSections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub invoice_sections: Vec<InvoiceSection>,
     #[doc = "The status of the billing profile."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -636,7 +699,12 @@ pub struct BillingProfileProperties {
     #[serde(rename = "spendingLimit", default, skip_serializing_if = "Option::is_none")]
     pub spending_limit: Option<billing_profile_properties::SpendingLimit>,
     #[doc = "Identifies the cloud environments that are associated with a billing profile. This is a system managed optional field and gets updated as the billing profile gets associated with accounts in various clouds."]
-    #[serde(rename = "targetClouds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetClouds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_clouds: Vec<TargetCloud>,
 }
 impl BillingProfileProperties {
@@ -1012,7 +1080,11 @@ impl BillingRoleAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingRoleAssignmentListResult {
     #[doc = "The list of role assignments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingRoleAssignment>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1104,7 +1176,11 @@ impl BillingRoleDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingRoleDefinitionListResult {
     #[doc = "The role definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingRoleDefinition>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1128,7 +1204,11 @@ pub struct BillingRoleDefinitionProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The billingPermissions the role has"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<BillingPermissionsProperties>,
     #[doc = "The name of the role"]
     #[serde(rename = "roleName", default, skip_serializing_if = "Option::is_none")]
@@ -1254,7 +1334,11 @@ pub mod billing_subscription_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingSubscriptionsListResult {
     #[doc = "The list of billing subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingSubscription>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1289,7 +1373,11 @@ impl Customer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomerListResult {
     #[doc = "The list of customers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Customer>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1379,10 +1467,19 @@ pub struct CustomerProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "Azure plans enabled for the customer."]
-    #[serde(rename = "enabledAzurePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledAzurePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_azure_plans: Vec<AzurePlan>,
     #[doc = "The list of resellers for which an Azure plan is enabled for the customer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resellers: Vec<Reseller>,
 }
 impl CustomerProperties {
@@ -1408,7 +1505,11 @@ impl Department {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DepartmentListResult {
     #[doc = "The list of departments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Department>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1432,7 +1533,12 @@ pub struct DepartmentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "Associated enrollment accounts. By default this is not populated, unless it's specified in $expand."]
-    #[serde(rename = "enrollmentAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enrollmentAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enrollment_accounts: Vec<EnrollmentAccount>,
 }
 impl DepartmentProperties {
@@ -1498,7 +1604,12 @@ pub struct DetachPaymentMethodEligibilityResult {
     #[serde(rename = "isEligible", default, skip_serializing_if = "Option::is_none")]
     pub is_eligible: Option<bool>,
     #[doc = "The list of detach payment method eligibility errors."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<DetachPaymentMethodErrorDetails>,
 }
 impl DetachPaymentMethodEligibilityResult {
@@ -1552,7 +1663,12 @@ pub struct Document {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub url: Option<String>,
     #[doc = "Document numbers for an Enterprise Agreement invoice."]
-    #[serde(rename = "documentNumbers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "documentNumbers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub document_numbers: Vec<String>,
 }
 impl Document {
@@ -1733,7 +1849,11 @@ impl EnrollmentAccountContext {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EnrollmentAccountListResult {
     #[doc = "The list of enrollment accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnrollmentAccount>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1912,7 +2032,11 @@ impl Instruction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstructionListResult {
     #[doc = "The list of billing instructions used during invoice generation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Instruction>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1972,7 +2096,11 @@ impl Invoice {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InvoiceListResult {
     #[doc = "The list of invoices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Invoice>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2050,10 +2178,18 @@ pub struct InvoiceProperties {
     #[serde(rename = "purchaseOrderNumber", default, skip_serializing_if = "Option::is_none")]
     pub purchase_order_number: Option<String>,
     #[doc = "List of documents available to download such as invoice and tax receipt."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub documents: Vec<Document>,
     #[doc = "List of payments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub payments: Vec<PaymentProperties>,
     #[doc = "The ID of the subscription for which the invoice is generated."]
     #[serde(rename = "subscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -2240,7 +2376,11 @@ impl InvoiceSectionCreationRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InvoiceSectionListResult {
     #[doc = "The list of invoice sections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InvoiceSection>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2255,7 +2395,11 @@ impl InvoiceSectionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InvoiceSectionListWithCreateSubPermissionResult {
     #[doc = "The list of invoice section properties with create subscription permission."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InvoiceSectionWithCreateSubPermission>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2355,7 +2499,12 @@ pub struct InvoiceSectionWithCreateSubPermission {
     #[serde(rename = "billingProfileSpendingLimit", default, skip_serializing_if = "Option::is_none")]
     pub billing_profile_spending_limit: Option<invoice_section_with_create_sub_permission::BillingProfileSpendingLimit>,
     #[doc = "Enabled azure plans for the associated billing profile."]
-    #[serde(rename = "enabledAzurePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledAzurePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_azure_plans: Vec<AzurePlan>,
 }
 impl InvoiceSectionWithCreateSubPermission {
@@ -2526,7 +2675,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of billing operations supported by the Microsoft.Billing resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2640,7 +2793,11 @@ pub mod payment_method_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PaymentMethodsListResult {
     #[doc = "The list of payment methods."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PaymentMethod>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3217,7 +3374,11 @@ impl Serialize for ProductType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProductsListResult {
     #[doc = "The list of products."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Product>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3250,7 +3411,11 @@ impl RecipientTransferDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecipientTransferDetailsListResult {
     #[doc = "The list of transfers received by caller."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecipientTransferDetails>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3277,7 +3442,12 @@ pub struct RecipientTransferProperties {
     #[serde(rename = "expirationTime", default, with = "azure_core::date::rfc3339::option")]
     pub expiration_time: Option<time::OffsetDateTime>,
     #[doc = "Type of subscriptions that can be transferred."]
-    #[serde(rename = "allowedProductType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedProductType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_product_type: Vec<EligibleProductType>,
     #[doc = "The status of a transfer."]
     #[serde(rename = "transferStatus", default, skip_serializing_if = "Option::is_none")]
@@ -3304,7 +3474,12 @@ pub struct RecipientTransferProperties {
     #[serde(rename = "lastModifiedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_modified_time: Option<time::OffsetDateTime>,
     #[doc = "Detailed transfer status."]
-    #[serde(rename = "detailedTransferStatus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "detailedTransferStatus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub detailed_transfer_status: Vec<DetailedTransferStatus>,
 }
 impl RecipientTransferProperties {
@@ -3516,7 +3691,11 @@ impl Transaction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransactionListResult {
     #[doc = "The list of transactions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Transaction>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3791,7 +3970,11 @@ impl TransferDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransferDetailsListResult {
     #[doc = "The list of transfers initiated by caller."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TransferDetails>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3866,7 +4049,12 @@ pub struct TransferProperties {
     #[serde(rename = "lastModifiedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_modified_time: Option<time::OffsetDateTime>,
     #[doc = "Detailed transfer status."]
-    #[serde(rename = "detailedTransferStatus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "detailedTransferStatus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub detailed_transfer_status: Vec<DetailedTransferStatus>,
 }
 impl TransferProperties {
@@ -4006,7 +4194,12 @@ pub struct ValidateAddressResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<AddressValidationStatus>,
     #[doc = "The list of suggested addresses."]
-    #[serde(rename = "suggestedAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "suggestedAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub suggested_addresses: Vec<AddressDetails>,
     #[doc = "Validation error message."]
     #[serde(rename = "validationMessage", default, skip_serializing_if = "Option::is_none")]
@@ -4087,7 +4280,11 @@ impl ValidateSubscriptionTransferEligibilityResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ValidateTransferListResponse {
     #[doc = "The list of transfer validation results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ValidateTransferResponse>,
 }
 impl ValidateTransferListResponse {
@@ -4117,7 +4314,11 @@ pub struct ValidateTransferResponseProperties {
     #[serde(rename = "productId", default, skip_serializing_if = "Option::is_none")]
     pub product_id: Option<String>,
     #[doc = "The array of validation results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub results: Vec<ValidationResultProperties>,
 }
 impl ValidateTransferResponseProperties {
diff --git a/services/mgmt/billing/src/package_2020_05/models.rs b/services/mgmt/billing/src/package_2020_05/models.rs
index d1d511e5c2..bb962303bc 100644
--- a/services/mgmt/billing/src/package_2020_05/models.rs
+++ b/services/mgmt/billing/src/package_2020_05/models.rs
@@ -124,7 +124,11 @@ impl Agreement {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgreementListResult {
     #[doc = "The list of agreements."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Agreement>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -163,7 +167,11 @@ pub struct AgreementProperties {
     #[serde(rename = "expirationDate", default, with = "azure_core::date::rfc3339::option")]
     pub expiration_date: Option<time::OffsetDateTime>,
     #[doc = "The list of participants that participates in acceptance of an agreement."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub participants: Vec<Participants>,
     #[doc = "The current status of the agreement."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -329,7 +337,11 @@ impl BillingAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingAccountListResult {
     #[doc = "The list of billing accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingAccount>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -371,10 +383,19 @@ pub struct BillingAccountProperties {
     #[serde(rename = "enrollmentDetails", default, skip_serializing_if = "Option::is_none")]
     pub enrollment_details: Option<Enrollment>,
     #[doc = "The departments associated to the enrollment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub departments: Vec<Department>,
     #[doc = "The accounts associated to the enrollment."]
-    #[serde(rename = "enrollmentAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enrollmentAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enrollment_accounts: Vec<EnrollmentAccount>,
     #[doc = "Indicates whether user has read access to the billing account."]
     #[serde(rename = "hasReadAccess", default, skip_serializing_if = "Option::is_none")]
@@ -556,7 +577,12 @@ pub struct BillingPeriodProperties {
     #[serde(rename = "billingPeriodEndDate", default, skip_serializing_if = "Option::is_none")]
     pub billing_period_end_date: Option<String>,
     #[doc = "Array of invoice ids that associated with."]
-    #[serde(rename = "invoiceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "invoiceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub invoice_ids: Vec<String>,
 }
 impl BillingPeriodProperties {
@@ -568,7 +594,11 @@ impl BillingPeriodProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingPeriodsListResult {
     #[doc = "The list of billing periods."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingPeriod>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -589,7 +619,11 @@ impl BillingPeriodsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingPermissionsListResult {
     #[doc = "The list of billingPermissions a caller has on a billing account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingPermissionsProperties>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -610,10 +644,19 @@ impl BillingPermissionsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingPermissionsProperties {
     #[doc = "The set of actions that the caller is allowed to perform."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<Action>,
     #[doc = "The set of actions that the caller is not allowed to perform."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<NotAction>,
 }
 impl BillingPermissionsProperties {
@@ -651,7 +694,12 @@ pub struct BillingProfileCreationRequest {
     #[serde(rename = "invoiceEmailOptIn", default, skip_serializing_if = "Option::is_none")]
     pub invoice_email_opt_in: Option<bool>,
     #[doc = "Enabled azure plans for the billing profile."]
-    #[serde(rename = "enabledAzurePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledAzurePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_azure_plans: Vec<AzurePlan>,
 }
 impl BillingProfileCreationRequest {
@@ -681,7 +729,11 @@ impl BillingProfileInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingProfileListResult {
     #[doc = "The list of billing profiles."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingProfile>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -729,7 +781,12 @@ pub struct BillingProfileProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub currency: Option<String>,
     #[doc = "Information about the enabled azure plans."]
-    #[serde(rename = "enabledAzurePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledAzurePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_azure_plans: Vec<AzurePlan>,
     #[doc = "The invoice sections associated to the billing profile. By default this is not populated, unless it's specified in $expand."]
     #[serde(rename = "invoiceSections", default, skip_serializing_if = "Option::is_none")]
@@ -750,7 +807,12 @@ pub struct BillingProfileProperties {
     #[serde(rename = "spendingLimit", default, skip_serializing_if = "Option::is_none")]
     pub spending_limit: Option<billing_profile_properties::SpendingLimit>,
     #[doc = "Identifies the cloud environments that are associated with a billing profile. This is a system managed optional field and gets updated as the billing profile gets associated with accounts in various clouds."]
-    #[serde(rename = "targetClouds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetClouds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_clouds: Vec<TargetCloud>,
     #[doc = "Tags of billing profiles."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -928,7 +990,11 @@ pub struct BillingProfilesOnExpand {
     #[serde(rename = "hasMoreResults", default, skip_serializing_if = "Option::is_none")]
     pub has_more_results: Option<bool>,
     #[doc = "The billing profiles associated with the billing account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingProfile>,
 }
 impl BillingProfilesOnExpand {
@@ -1150,7 +1216,11 @@ impl BillingRoleAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingRoleAssignmentListResult {
     #[doc = "The list of role assignments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingRoleAssignment>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1224,7 +1294,11 @@ impl BillingRoleDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingRoleDefinitionListResult {
     #[doc = "The role definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingRoleDefinition>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1248,7 +1322,11 @@ pub struct BillingRoleDefinitionProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The billingPermissions the role has"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<BillingPermissionsProperties>,
     #[doc = "The name of the role"]
     #[serde(rename = "roleName", default, skip_serializing_if = "Option::is_none")]
@@ -1322,7 +1400,12 @@ pub struct BillingSubscriptionProperties {
     #[serde(rename = "skuDescription", default, skip_serializing_if = "Option::is_none")]
     pub sku_description: Option<String>,
     #[doc = "The suspension reason for a subscription. Applies only to subscriptions in Microsoft Online Services Program billing accounts."]
-    #[serde(rename = "suspensionReasons", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "suspensionReasons",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub suspension_reasons: Vec<String>,
 }
 impl BillingSubscriptionProperties {
@@ -1380,7 +1463,11 @@ pub mod billing_subscription_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingSubscriptionsListResult {
     #[doc = "The list of billing subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingSubscription>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -1418,7 +1505,11 @@ impl Customer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomerListResult {
     #[doc = "The list of customers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Customer>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -1517,10 +1608,19 @@ pub struct CustomerProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "Azure plans enabled for the customer."]
-    #[serde(rename = "enabledAzurePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledAzurePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_azure_plans: Vec<AzurePlan>,
     #[doc = "The list of resellers for which an Azure plan is enabled for the customer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resellers: Vec<Reseller>,
 }
 impl CustomerProperties {
@@ -1555,7 +1655,12 @@ pub struct DepartmentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "Associated enrollment accounts. By default this is not populated, unless it's specified in $expand."]
-    #[serde(rename = "enrollmentAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enrollmentAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enrollment_accounts: Vec<EnrollmentAccount>,
 }
 impl DepartmentProperties {
@@ -1754,7 +1859,11 @@ impl EnrollmentAccountContext {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EnrollmentAccountListResult {
     #[doc = "The list of enrollment accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnrollmentAccountSummary>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1926,7 +2035,11 @@ impl Instruction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstructionListResult {
     #[doc = "The list of billing instructions used during invoice generation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Instruction>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1986,7 +2099,11 @@ impl Invoice {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InvoiceListResult {
     #[doc = "The list of invoices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Invoice>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2064,10 +2181,18 @@ pub struct InvoiceProperties {
     #[serde(rename = "purchaseOrderNumber", default, skip_serializing_if = "Option::is_none")]
     pub purchase_order_number: Option<String>,
     #[doc = "List of documents available to download such as invoice and tax receipt."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub documents: Vec<Document>,
     #[doc = "List of payments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub payments: Vec<PaymentProperties>,
     #[doc = "Rebill details for an invoice."]
     #[serde(rename = "rebillDetails", default, skip_serializing_if = "Option::is_none")]
@@ -2240,7 +2365,11 @@ impl InvoiceSectionCreationRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InvoiceSectionListResult {
     #[doc = "The list of invoice sections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InvoiceSection>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -2264,7 +2393,11 @@ impl InvoiceSectionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InvoiceSectionListWithCreateSubPermissionResult {
     #[doc = "The list of invoice section properties with create subscription permission."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InvoiceSectionWithCreateSubPermission>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2379,7 +2512,12 @@ pub struct InvoiceSectionWithCreateSubPermission {
     #[serde(rename = "billingProfileSystemId", default, skip_serializing_if = "Option::is_none")]
     pub billing_profile_system_id: Option<String>,
     #[doc = "Enabled azure plans for the associated billing profile."]
-    #[serde(rename = "enabledAzurePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledAzurePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_azure_plans: Vec<AzurePlan>,
 }
 impl InvoiceSectionWithCreateSubPermission {
@@ -2516,7 +2654,11 @@ pub struct InvoiceSectionsOnExpand {
     #[serde(rename = "hasMoreResults", default, skip_serializing_if = "Option::is_none")]
     pub has_more_results: Option<bool>,
     #[doc = "The invoice sections associated to the billing profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InvoiceSection>,
 }
 impl InvoiceSectionsOnExpand {
@@ -2571,7 +2713,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of billing operations supported by the Microsoft.Billing resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3146,7 +3292,11 @@ impl Serialize for ProductTransferValidationErrorCode {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProductsListResult {
     #[doc = "The list of products."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Product>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -3231,7 +3381,12 @@ pub type ReservationAppliedScope = String;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationProperty {
     #[doc = "The array of applied scopes of a reservation. Will be null if the reservation is in Shared scope"]
-    #[serde(rename = "appliedScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appliedScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applied_scopes: Vec<ReservationAppliedScope>,
     #[doc = "The applied scope type of the reservation."]
     #[serde(rename = "appliedScopeType", default, skip_serializing_if = "Option::is_none")]
@@ -3296,7 +3451,11 @@ pub mod reservation_property {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub trend: Option<String>,
         #[doc = "The array of aggregates of a reservation's utilization"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub aggregates: Vec<ReservationUtilizationAggregates>,
     }
     impl Utilization {
@@ -3369,7 +3528,11 @@ impl ReservationUtilizationAggregates {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationsListResult {
     #[doc = "The list of reservations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Reservation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3578,7 +3741,11 @@ impl Transaction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransactionListResult {
     #[doc = "The list of transactions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Transaction>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -3828,7 +3995,12 @@ pub struct ValidateAddressResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<AddressValidationStatus>,
     #[doc = "The list of suggested addresses."]
-    #[serde(rename = "suggestedAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "suggestedAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub suggested_addresses: Vec<AddressDetails>,
     #[doc = "Validation error message."]
     #[serde(rename = "validationMessage", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/billing/src/package_2020_09_preview/models.rs b/services/mgmt/billing/src/package_2020_09_preview/models.rs
index da9ef32ce8..fccf0fda98 100644
--- a/services/mgmt/billing/src/package_2020_09_preview/models.rs
+++ b/services/mgmt/billing/src/package_2020_09_preview/models.rs
@@ -124,7 +124,11 @@ impl Agreement {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgreementListResult {
     #[doc = "The list of agreements."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Agreement>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -163,7 +167,11 @@ pub struct AgreementProperties {
     #[serde(rename = "expirationDate", default, with = "azure_core::date::rfc3339::option")]
     pub expiration_date: Option<time::OffsetDateTime>,
     #[doc = "The list of participants that participates in acceptance of an agreement."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub participants: Vec<Participants>,
     #[doc = "The current status of the agreement."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -330,7 +338,11 @@ impl BillingAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingAccountListResult {
     #[doc = "The list of billing accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingAccount>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -372,10 +384,19 @@ pub struct BillingAccountProperties {
     #[serde(rename = "enrollmentDetails", default, skip_serializing_if = "Option::is_none")]
     pub enrollment_details: Option<Enrollment>,
     #[doc = "The departments associated to the enrollment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub departments: Vec<Department>,
     #[doc = "The accounts associated to the enrollment."]
-    #[serde(rename = "enrollmentAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enrollmentAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enrollment_accounts: Vec<EnrollmentAccount>,
     #[doc = "Indicates whether user has read access to the billing account."]
     #[serde(rename = "hasReadAccess", default, skip_serializing_if = "Option::is_none")]
@@ -537,7 +558,11 @@ impl BillingAccountUpdateRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingPermissionsListResult {
     #[doc = "The list of billingPermissions a caller has on a billing account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingPermissionsProperties>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -558,10 +583,19 @@ impl BillingPermissionsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingPermissionsProperties {
     #[doc = "The set of actions that the caller is allowed to perform."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<Action>,
     #[doc = "The set of actions that the caller is not allowed to perform."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<NotAction>,
 }
 impl BillingPermissionsProperties {
@@ -599,7 +633,12 @@ pub struct BillingProfileCreationRequest {
     #[serde(rename = "invoiceEmailOptIn", default, skip_serializing_if = "Option::is_none")]
     pub invoice_email_opt_in: Option<bool>,
     #[doc = "Enabled azure plans for the billing profile."]
-    #[serde(rename = "enabledAzurePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledAzurePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_azure_plans: Vec<AzurePlan>,
 }
 impl BillingProfileCreationRequest {
@@ -629,7 +668,11 @@ impl BillingProfileInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingProfileListResult {
     #[doc = "The list of billing profiles."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingProfile>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -677,7 +720,12 @@ pub struct BillingProfileProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub currency: Option<String>,
     #[doc = "Information about the enabled azure plans."]
-    #[serde(rename = "enabledAzurePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledAzurePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_azure_plans: Vec<AzurePlan>,
     #[doc = "The invoice sections associated to the billing profile. By default this is not populated, unless it's specified in $expand."]
     #[serde(rename = "invoiceSections", default, skip_serializing_if = "Option::is_none")]
@@ -698,7 +746,12 @@ pub struct BillingProfileProperties {
     #[serde(rename = "spendingLimit", default, skip_serializing_if = "Option::is_none")]
     pub spending_limit: Option<billing_profile_properties::SpendingLimit>,
     #[doc = "Identifies the cloud environments that are associated with a billing profile. This is a system managed optional field and gets updated as the billing profile gets associated with accounts in various clouds."]
-    #[serde(rename = "targetClouds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetClouds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_clouds: Vec<TargetCloud>,
     #[doc = "Tags of billing profiles."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -876,7 +929,11 @@ pub struct BillingProfilesOnExpand {
     #[serde(rename = "hasMoreResults", default, skip_serializing_if = "Option::is_none")]
     pub has_more_results: Option<bool>,
     #[doc = "The billing profiles associated with the billing account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingProfile>,
 }
 impl BillingProfilesOnExpand {
@@ -1098,7 +1155,11 @@ impl BillingRoleAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingRoleAssignmentListResult {
     #[doc = "The list of role assignments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingRoleAssignment>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1172,7 +1233,11 @@ impl BillingRoleDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingRoleDefinitionListResult {
     #[doc = "The role definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingRoleDefinition>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1196,7 +1261,11 @@ pub struct BillingRoleDefinitionProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The billingPermissions the role has"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<BillingPermissionsProperties>,
     #[doc = "The name of the role"]
     #[serde(rename = "roleName", default, skip_serializing_if = "Option::is_none")]
@@ -1270,7 +1339,12 @@ pub struct BillingSubscriptionProperties {
     #[serde(rename = "skuDescription", default, skip_serializing_if = "Option::is_none")]
     pub sku_description: Option<String>,
     #[doc = "The suspension reason for a subscription. Applies only to subscriptions in Microsoft Online Services Program billing accounts."]
-    #[serde(rename = "suspensionReasons", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "suspensionReasons",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub suspension_reasons: Vec<String>,
 }
 impl BillingSubscriptionProperties {
@@ -1328,7 +1402,11 @@ pub mod billing_subscription_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingSubscriptionsListResult {
     #[doc = "The list of billing subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingSubscription>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -1366,7 +1444,11 @@ impl Customer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomerListResult {
     #[doc = "The list of customers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Customer>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -1465,10 +1547,19 @@ pub struct CustomerProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "Azure plans enabled for the customer."]
-    #[serde(rename = "enabledAzurePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledAzurePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_azure_plans: Vec<AzurePlan>,
     #[doc = "The list of resellers for which an Azure plan is enabled for the customer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resellers: Vec<Reseller>,
 }
 impl CustomerProperties {
@@ -1503,7 +1594,12 @@ pub struct DepartmentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "Associated enrollment accounts. By default this is not populated, unless it's specified in $expand."]
-    #[serde(rename = "enrollmentAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enrollmentAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enrollment_accounts: Vec<EnrollmentAccount>,
 }
 impl DepartmentProperties {
@@ -1827,7 +1923,11 @@ impl Instruction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstructionListResult {
     #[doc = "The list of billing instructions used during invoice generation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Instruction>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1887,7 +1987,11 @@ impl Invoice {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InvoiceListResult {
     #[doc = "The list of invoices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Invoice>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1965,10 +2069,18 @@ pub struct InvoiceProperties {
     #[serde(rename = "purchaseOrderNumber", default, skip_serializing_if = "Option::is_none")]
     pub purchase_order_number: Option<String>,
     #[doc = "List of documents available to download such as invoice and tax receipt."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub documents: Vec<Document>,
     #[doc = "List of payments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub payments: Vec<PaymentProperties>,
     #[doc = "Rebill details for an invoice."]
     #[serde(rename = "rebillDetails", default, skip_serializing_if = "Option::is_none")]
@@ -2141,7 +2253,11 @@ impl InvoiceSectionCreationRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InvoiceSectionListResult {
     #[doc = "The list of invoice sections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InvoiceSection>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -2165,7 +2281,11 @@ impl InvoiceSectionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InvoiceSectionListWithCreateSubPermissionResult {
     #[doc = "The list of invoice section properties with create subscription permission."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InvoiceSectionWithCreateSubPermission>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2280,7 +2400,12 @@ pub struct InvoiceSectionWithCreateSubPermission {
     #[serde(rename = "billingProfileSystemId", default, skip_serializing_if = "Option::is_none")]
     pub billing_profile_system_id: Option<String>,
     #[doc = "Enabled azure plans for the associated billing profile."]
-    #[serde(rename = "enabledAzurePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledAzurePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_azure_plans: Vec<AzurePlan>,
 }
 impl InvoiceSectionWithCreateSubPermission {
@@ -2417,7 +2542,11 @@ pub struct InvoiceSectionsOnExpand {
     #[serde(rename = "hasMoreResults", default, skip_serializing_if = "Option::is_none")]
     pub has_more_results: Option<bool>,
     #[doc = "The invoice sections associated to the billing profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InvoiceSection>,
 }
 impl InvoiceSectionsOnExpand {
@@ -2472,7 +2601,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of billing operations supported by the Microsoft.Billing resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3047,7 +3180,11 @@ impl Serialize for ProductTransferValidationErrorCode {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProductsListResult {
     #[doc = "The list of products."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Product>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -3159,7 +3296,11 @@ impl PromotionCreateSkuNameRequestProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PromotionList {
     #[doc = "The list of promotions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PromotionResponse>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3288,7 +3429,12 @@ pub type ReservationAppliedScope = String;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationProperty {
     #[doc = "The array of applied scopes of a reservation. Will be null if the reservation is in Shared scope"]
-    #[serde(rename = "appliedScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appliedScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applied_scopes: Vec<ReservationAppliedScope>,
     #[doc = "The applied scope type of the reservation."]
     #[serde(rename = "appliedScopeType", default, skip_serializing_if = "Option::is_none")]
@@ -3353,7 +3499,11 @@ pub mod reservation_property {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub trend: Option<String>,
         #[doc = "The array of aggregates of a reservation's utilization"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub aggregates: Vec<ReservationUtilizationAggregates>,
     }
     impl Utilization {
@@ -3426,7 +3576,11 @@ impl ReservationUtilizationAggregates {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationsListResult {
     #[doc = "The list of reservations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Reservation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3635,7 +3789,11 @@ impl Transaction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransactionListResult {
     #[doc = "The list of transactions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Transaction>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -3885,7 +4043,12 @@ pub struct ValidateAddressResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<AddressValidationStatus>,
     #[doc = "The list of suggested addresses."]
-    #[serde(rename = "suggestedAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "suggestedAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub suggested_addresses: Vec<AddressDetails>,
     #[doc = "Validation error message."]
     #[serde(rename = "validationMessage", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/billing/src/package_2020_11_preview/models.rs b/services/mgmt/billing/src/package_2020_11_preview/models.rs
index a7a9dc6eb7..447a481b62 100644
--- a/services/mgmt/billing/src/package_2020_11_preview/models.rs
+++ b/services/mgmt/billing/src/package_2020_11_preview/models.rs
@@ -124,7 +124,11 @@ impl Agreement {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgreementListResult {
     #[doc = "The list of agreements."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Agreement>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -163,7 +167,11 @@ pub struct AgreementProperties {
     #[serde(rename = "expirationDate", default, with = "azure_core::date::rfc3339::option")]
     pub expiration_date: Option<time::OffsetDateTime>,
     #[doc = "The list of participants that participates in acceptance of an agreement."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub participants: Vec<Participants>,
     #[doc = "The current status of the agreement."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -330,7 +338,11 @@ impl BillingAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingAccountListResult {
     #[doc = "The list of billing accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingAccount>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -372,10 +384,19 @@ pub struct BillingAccountProperties {
     #[serde(rename = "enrollmentDetails", default, skip_serializing_if = "Option::is_none")]
     pub enrollment_details: Option<Enrollment>,
     #[doc = "The departments associated to the enrollment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub departments: Vec<Department>,
     #[doc = "The accounts associated to the enrollment."]
-    #[serde(rename = "enrollmentAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enrollmentAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enrollment_accounts: Vec<EnrollmentAccount>,
     #[doc = "Indicates whether user has read access to the billing account."]
     #[serde(rename = "hasReadAccess", default, skip_serializing_if = "Option::is_none")]
@@ -537,7 +558,11 @@ impl BillingAccountUpdateRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingPermissionsListResult {
     #[doc = "The list of billingPermissions a caller has on a billing account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingPermissionsProperties>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -558,10 +583,19 @@ impl BillingPermissionsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingPermissionsProperties {
     #[doc = "The set of actions that the caller is allowed to perform."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<Action>,
     #[doc = "The set of actions that the caller is not allowed to perform."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<NotAction>,
 }
 impl BillingPermissionsProperties {
@@ -599,7 +633,12 @@ pub struct BillingProfileCreationRequest {
     #[serde(rename = "invoiceEmailOptIn", default, skip_serializing_if = "Option::is_none")]
     pub invoice_email_opt_in: Option<bool>,
     #[doc = "Enabled azure plans for the billing profile."]
-    #[serde(rename = "enabledAzurePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledAzurePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_azure_plans: Vec<AzurePlan>,
 }
 impl BillingProfileCreationRequest {
@@ -629,7 +668,11 @@ impl BillingProfileInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingProfileListResult {
     #[doc = "The list of billing profiles."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingProfile>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -677,7 +720,12 @@ pub struct BillingProfileProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub currency: Option<String>,
     #[doc = "Information about the enabled azure plans."]
-    #[serde(rename = "enabledAzurePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledAzurePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_azure_plans: Vec<AzurePlan>,
     #[doc = "The invoice sections associated to the billing profile. By default this is not populated, unless it's specified in $expand."]
     #[serde(rename = "invoiceSections", default, skip_serializing_if = "Option::is_none")]
@@ -698,7 +746,12 @@ pub struct BillingProfileProperties {
     #[serde(rename = "spendingLimit", default, skip_serializing_if = "Option::is_none")]
     pub spending_limit: Option<billing_profile_properties::SpendingLimit>,
     #[doc = "Identifies the cloud environments that are associated with a billing profile. This is a system managed optional field and gets updated as the billing profile gets associated with accounts in various clouds."]
-    #[serde(rename = "targetClouds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetClouds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_clouds: Vec<TargetCloud>,
     #[doc = "Tags of billing profiles."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -876,7 +929,11 @@ pub struct BillingProfilesOnExpand {
     #[serde(rename = "hasMoreResults", default, skip_serializing_if = "Option::is_none")]
     pub has_more_results: Option<bool>,
     #[doc = "The billing profiles associated with the billing account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingProfile>,
 }
 impl BillingProfilesOnExpand {
@@ -1098,7 +1155,11 @@ impl BillingRoleAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingRoleAssignmentListResult {
     #[doc = "The list of role assignments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingRoleAssignment>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1172,7 +1233,11 @@ impl BillingRoleDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingRoleDefinitionListResult {
     #[doc = "The role definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingRoleDefinition>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1196,7 +1261,11 @@ pub struct BillingRoleDefinitionProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The billingPermissions the role has"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<BillingPermissionsProperties>,
     #[doc = "The name of the role"]
     #[serde(rename = "roleName", default, skip_serializing_if = "Option::is_none")]
@@ -1270,7 +1339,12 @@ pub struct BillingSubscriptionProperties {
     #[serde(rename = "skuDescription", default, skip_serializing_if = "Option::is_none")]
     pub sku_description: Option<String>,
     #[doc = "The suspension reason for a subscription. Applies only to subscriptions in Microsoft Online Services Program billing accounts."]
-    #[serde(rename = "suspensionReasons", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "suspensionReasons",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub suspension_reasons: Vec<String>,
 }
 impl BillingSubscriptionProperties {
@@ -1328,7 +1402,11 @@ pub mod billing_subscription_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingSubscriptionsListResult {
     #[doc = "The list of billing subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingSubscription>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -1366,7 +1444,11 @@ impl Customer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomerListResult {
     #[doc = "The list of customers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Customer>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -1465,10 +1547,19 @@ pub struct CustomerProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "Azure plans enabled for the customer."]
-    #[serde(rename = "enabledAzurePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledAzurePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_azure_plans: Vec<AzurePlan>,
     #[doc = "The list of resellers for which an Azure plan is enabled for the customer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resellers: Vec<Reseller>,
 }
 impl CustomerProperties {
@@ -1503,7 +1594,12 @@ pub struct DepartmentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "Associated enrollment accounts. By default this is not populated, unless it's specified in $expand."]
-    #[serde(rename = "enrollmentAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enrollmentAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enrollment_accounts: Vec<EnrollmentAccount>,
 }
 impl DepartmentProperties {
@@ -1827,7 +1923,11 @@ impl Instruction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstructionListResult {
     #[doc = "The list of billing instructions used during invoice generation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Instruction>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1887,7 +1987,11 @@ impl Invoice {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InvoiceListResult {
     #[doc = "The list of invoices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Invoice>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1965,10 +2069,18 @@ pub struct InvoiceProperties {
     #[serde(rename = "purchaseOrderNumber", default, skip_serializing_if = "Option::is_none")]
     pub purchase_order_number: Option<String>,
     #[doc = "List of documents available to download such as invoice and tax receipt."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub documents: Vec<Document>,
     #[doc = "List of payments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub payments: Vec<PaymentProperties>,
     #[doc = "Rebill details for an invoice."]
     #[serde(rename = "rebillDetails", default, skip_serializing_if = "Option::is_none")]
@@ -2141,7 +2253,11 @@ impl InvoiceSectionCreationRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InvoiceSectionListResult {
     #[doc = "The list of invoice sections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InvoiceSection>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -2165,7 +2281,11 @@ impl InvoiceSectionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InvoiceSectionListWithCreateSubPermissionResult {
     #[doc = "The list of invoice section properties with create subscription permission."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InvoiceSectionWithCreateSubPermission>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2280,7 +2400,12 @@ pub struct InvoiceSectionWithCreateSubPermission {
     #[serde(rename = "billingProfileSystemId", default, skip_serializing_if = "Option::is_none")]
     pub billing_profile_system_id: Option<String>,
     #[doc = "Enabled azure plans for the associated billing profile."]
-    #[serde(rename = "enabledAzurePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledAzurePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_azure_plans: Vec<AzurePlan>,
 }
 impl InvoiceSectionWithCreateSubPermission {
@@ -2417,7 +2542,11 @@ pub struct InvoiceSectionsOnExpand {
     #[serde(rename = "hasMoreResults", default, skip_serializing_if = "Option::is_none")]
     pub has_more_results: Option<bool>,
     #[doc = "The invoice sections associated to the billing profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InvoiceSection>,
 }
 impl InvoiceSectionsOnExpand {
@@ -2472,7 +2601,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of billing operations supported by the Microsoft.Billing resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3047,7 +3180,11 @@ impl Serialize for ProductTransferValidationErrorCode {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProductsListResult {
     #[doc = "The list of products."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Product>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -3147,7 +3284,11 @@ impl PromotionCreateSkuNameRequestProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PromotionList {
     #[doc = "The list of promotions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PromotionResponse>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3276,7 +3417,12 @@ pub type ReservationAppliedScope = String;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationProperty {
     #[doc = "The array of applied scopes of a reservation. Will be null if the reservation is in Shared scope"]
-    #[serde(rename = "appliedScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appliedScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applied_scopes: Vec<ReservationAppliedScope>,
     #[doc = "The applied scope type of the reservation."]
     #[serde(rename = "appliedScopeType", default, skip_serializing_if = "Option::is_none")]
@@ -3341,7 +3487,11 @@ pub mod reservation_property {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub trend: Option<String>,
         #[doc = "The array of aggregates of a reservation's utilization"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub aggregates: Vec<ReservationUtilizationAggregates>,
     }
     impl Utilization {
@@ -3414,7 +3564,11 @@ impl ReservationUtilizationAggregates {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationsListResult {
     #[doc = "The list of reservations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Reservation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3623,7 +3777,11 @@ impl Transaction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransactionListResult {
     #[doc = "The list of transactions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Transaction>,
     #[doc = "Total number of records."]
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
@@ -3873,7 +4031,12 @@ pub struct ValidateAddressResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<AddressValidationStatus>,
     #[doc = "The list of suggested addresses."]
-    #[serde(rename = "suggestedAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "suggestedAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub suggested_addresses: Vec<AddressDetails>,
     #[doc = "Validation error message."]
     #[serde(rename = "validationMessage", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/billing/src/package_2021_10/models.rs b/services/mgmt/billing/src/package_2021_10/models.rs
index 1da227dd87..2a08f5403d 100644
--- a/services/mgmt/billing/src/package_2021_10/models.rs
+++ b/services/mgmt/billing/src/package_2021_10/models.rs
@@ -50,7 +50,11 @@ impl BillingSubscriptionAlias {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingSubscriptionAliasListResult {
     #[doc = "The list of billing subscription aliases."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingSubscriptionAlias>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -196,7 +200,12 @@ pub struct BillingSubscriptionProperties {
     #[serde(rename = "subscriptionId", default, skip_serializing_if = "Option::is_none")]
     pub subscription_id: Option<String>,
     #[doc = "The suspension reason for the subscription. This field is not available for Enterprise Agreement billing accounts."]
-    #[serde(rename = "suspensionReasons", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "suspensionReasons",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub suspension_reasons: Vec<String>,
     #[doc = "The duration for which you can use the subscription. Example P1Y and P1M"]
     #[serde(rename = "termDuration", default, skip_serializing_if = "Option::is_none")]
@@ -334,7 +343,11 @@ impl BillingSubscriptionSplitRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingSubscriptionsListResult {
     #[doc = "The list of billing subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BillingSubscription>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -361,7 +374,11 @@ pub struct DetachPaymentMethodEligibilityError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The list of detach payment method eligibility errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<DetachPaymentMethodErrorDetails>,
 }
 impl DetachPaymentMethodEligibilityError {
@@ -764,7 +781,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of billing operations supported by the Microsoft.Billing resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -825,7 +846,11 @@ impl PaymentMethodLinkProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PaymentMethodLinksListResult {
     #[doc = "The list of payment method links."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PaymentMethodLink>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -882,7 +907,11 @@ pub struct PaymentMethodProjectionProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The list of logos for the payment method."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logos: Vec<PaymentMethodLogo>,
     #[doc = "Status of the payment method."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -994,7 +1023,11 @@ pub struct PaymentMethodProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The list of logos for the payment method."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logos: Vec<PaymentMethodLogo>,
     #[doc = "Status of the payment method."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1100,7 +1133,11 @@ impl PaymentMethodResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PaymentMethodsListResult {
     #[doc = "The list of payment methods."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PaymentMethod>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/blockchain/src/package_2018_06_01_preview/models.rs b/services/mgmt/blockchain/src/package_2018_06_01_preview/models.rs
index 80c9fe53e7..4a96013e1c 100644
--- a/services/mgmt/blockchain/src/package_2018_06_01_preview/models.rs
+++ b/services/mgmt/blockchain/src/package_2018_06_01_preview/models.rs
@@ -22,7 +22,11 @@ impl ApiKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiKeyCollection {
     #[doc = "Gets or sets the collection of API key."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<ApiKey>,
 }
 impl ApiKeyCollection {
@@ -51,7 +55,11 @@ impl BlockchainMember {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlockchainMemberCollection {
     #[doc = "Gets or sets the collection of blockchain members."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BlockchainMember>,
     #[doc = "Gets or sets the URL, that the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -123,7 +131,12 @@ pub struct BlockchainMemberProperties {
     #[serde(rename = "publicKey", default, skip_serializing_if = "Option::is_none")]
     pub public_key: Option<String>,
     #[doc = "Gets or sets firewall rules"]
-    #[serde(rename = "firewallRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_rules: Vec<FirewallRule>,
 }
 impl BlockchainMemberProperties {
@@ -312,7 +325,11 @@ pub mod consortium {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConsortiumCollection {
     #[doc = "Gets or sets the collection of consortiums."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Consortium>,
 }
 impl ConsortiumCollection {
@@ -354,7 +371,11 @@ impl ConsortiumMember {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConsortiumMemberCollection {
     #[doc = "Gets or sets the collection of consortiums."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConsortiumMember>,
     #[doc = "Gets or sets the URL, that the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -525,7 +546,11 @@ impl ResourceProviderOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationCollection {
     #[doc = "Gets or sets the collection of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
     #[doc = "Gets or sets the URL, that the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -570,7 +595,11 @@ pub struct ResourceTypeSku {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "Gets or sets the Skus"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skus: Vec<SkuSetting>,
 }
 impl ResourceTypeSku {
@@ -582,7 +611,11 @@ impl ResourceTypeSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceTypeSkuCollection {
     #[doc = "Gets or sets the collection of resource type Sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceTypeSku>,
 }
 impl ResourceTypeSkuCollection {
@@ -615,10 +648,19 @@ pub struct SkuSetting {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tier: Option<String>,
     #[doc = "Gets or sets the locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Gets or sets the required features."]
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
 }
 impl SkuSetting {
@@ -664,7 +706,11 @@ impl TransactionNode {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransactionNodeCollection {
     #[doc = "Gets or sets the collection of transaction nodes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TransactionNode>,
     #[doc = "Gets or sets the URL, that the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -700,7 +746,12 @@ pub struct TransactionNodeProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub password: Option<String>,
     #[doc = "Gets or sets the firewall rules."]
-    #[serde(rename = "firewallRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_rules: Vec<FirewallRule>,
 }
 impl TransactionNodeProperties {
@@ -761,7 +812,12 @@ pub struct TransactionNodePropertiesUpdate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub password: Option<String>,
     #[doc = "Gets or sets the firewall rules."]
-    #[serde(rename = "firewallRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_rules: Vec<FirewallRule>,
 }
 impl TransactionNodePropertiesUpdate {
diff --git a/services/mgmt/blueprint/src/package_2017_11_preview/models.rs b/services/mgmt/blueprint/src/package_2017_11_preview/models.rs
index 6c4bf9c12b..023972df68 100644
--- a/services/mgmt/blueprint/src/package_2017_11_preview/models.rs
+++ b/services/mgmt/blueprint/src/package_2017_11_preview/models.rs
@@ -68,7 +68,11 @@ pub mod artifact {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArtifactList {
     #[doc = "List of Blueprint artifacts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Artifact>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -89,7 +93,12 @@ impl ArtifactList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArtifactPropertiesBase {
     #[doc = "Artifacts which need to be deployed before the specified artifact."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<String>,
 }
 impl ArtifactPropertiesBase {
@@ -120,7 +129,11 @@ impl Assignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssignmentList {
     #[doc = "List of Blueprint assignments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Assignment>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -340,7 +353,11 @@ impl Blueprint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlueprintList {
     #[doc = "List of Blueprint definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Blueprint>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -496,7 +513,12 @@ pub struct ParameterDefinition {
     #[serde(rename = "defaultValue", default, skip_serializing_if = "Option::is_none")]
     pub default_value: Option<serde_json::Value>,
     #[doc = "Array of allowed values for this parameter."]
-    #[serde(rename = "allowedValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_values: Vec<serde_json::Value>,
 }
 impl ParameterDefinition {
@@ -688,7 +710,11 @@ impl PublishedBlueprint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PublishedBlueprintList {
     #[doc = "List of published Blueprints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PublishedBlueprint>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -735,7 +761,12 @@ pub struct ResourceGroupDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<ParameterDefinitionMetadata>,
     #[doc = "Artifacts which need to be deployed before this resource group."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<String>,
 }
 impl ResourceGroupDefinition {
@@ -817,7 +848,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
 }
 impl ResourceProviderOperationList {
diff --git a/services/mgmt/blueprint/src/package_2018_11_preview/models.rs b/services/mgmt/blueprint/src/package_2018_11_preview/models.rs
index f2dd4461cf..15278f0ad9 100644
--- a/services/mgmt/blueprint/src/package_2018_11_preview/models.rs
+++ b/services/mgmt/blueprint/src/package_2018_11_preview/models.rs
@@ -68,7 +68,11 @@ pub mod artifact {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArtifactList {
     #[doc = "List of blueprint artifacts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Artifact>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -89,7 +93,12 @@ impl ArtifactList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArtifactPropertiesBase {
     #[doc = "Artifacts which need to be deployed before the specified artifact."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<String>,
 }
 impl ArtifactPropertiesBase {
@@ -135,7 +144,11 @@ pub struct AssignmentDeploymentJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub result: Option<AssignmentDeploymentJobResult>,
     #[doc = "Result of this deployment job for each retry."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub history: Vec<AssignmentDeploymentJobResult>,
     #[doc = "Reference to deployment job resource id."]
     #[serde(rename = "requestUri", default, skip_serializing_if = "Option::is_none")]
@@ -153,7 +166,11 @@ pub struct AssignmentDeploymentJobResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub error: Option<AzureResourceManagerError>,
     #[doc = "Resources created as result of the deployment job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<AssignmentJobCreatedResource>,
 }
 impl AssignmentDeploymentJobResult {
@@ -179,7 +196,11 @@ impl AssignmentJobCreatedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssignmentList {
     #[doc = "List of blueprint assignments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Assignment>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -203,10 +224,20 @@ pub struct AssignmentLockSettings {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub mode: Option<assignment_lock_settings::Mode>,
     #[doc = "List of AAD principals excluded from blueprint locks. Up to 5 principals are permitted."]
-    #[serde(rename = "excludedPrincipals", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPrincipals",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_principals: Vec<String>,
     #[doc = "List\u{a0}of\u{a0}management\u{a0}operations\u{a0}that\u{a0}are\u{a0}excluded\u{a0}from\u{a0}blueprint\u{a0}locks.\u{a0}Up\u{a0}to\u{a0}200\u{a0}actions\u{a0}are\u{a0}permitted. If the lock mode is set to 'AllResourcesReadOnly', then the following actions are automatically appended to 'excludedActions': '*/read', 'Microsoft.Network/virtualNetworks/subnets/join/action' and 'Microsoft.Authorization/locks/delete'. If the lock mode is set to 'AllResourcesDoNotDelete', then the following actions are automatically appended to 'excludedActions': 'Microsoft.Authorization/locks/delete'. Duplicate actions will get removed."]
-    #[serde(rename = "excludedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_actions: Vec<String>,
 }
 impl AssignmentLockSettings {
@@ -274,7 +305,11 @@ impl AssignmentOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssignmentOperationList {
     #[doc = "List of AssignmentOperation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AssignmentOperation>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -310,7 +345,11 @@ pub struct AssignmentOperationProperties {
     #[serde(rename = "timeFinished", default, skip_serializing_if = "Option::is_none")]
     pub time_finished: Option<String>,
     #[doc = "List of jobs in this blueprint assignment operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployments: Vec<AssignmentDeploymentJob>,
 }
 impl AssignmentOperationProperties {
@@ -430,7 +469,12 @@ pub struct AssignmentStatus {
     #[serde(flatten)]
     pub blueprint_resource_status_base: BlueprintResourceStatusBase,
     #[doc = "List of resources that were created by the blueprint assignment."]
-    #[serde(rename = "managedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_resources: Vec<String>,
 }
 impl AssignmentStatus {
@@ -491,7 +535,11 @@ impl Blueprint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlueprintList {
     #[doc = "List of blueprint definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Blueprint>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -615,10 +663,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -707,7 +764,12 @@ pub struct ParameterDefinition {
     #[serde(rename = "defaultValue", default, skip_serializing_if = "Option::is_none")]
     pub default_value: Option<serde_json::Value>,
     #[doc = "Array of allowed values for this parameter."]
-    #[serde(rename = "allowedValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_values: Vec<serde_json::Value>,
 }
 impl ParameterDefinition {
@@ -870,7 +932,11 @@ impl PublishedBlueprint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PublishedBlueprintList {
     #[doc = "List of published blueprint definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PublishedBlueprint>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -917,7 +983,12 @@ pub struct ResourceGroupDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<ParameterDefinitionMetadata>,
     #[doc = "Artifacts which need to be deployed before this resource group."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<String>,
     #[doc = "Tags to be assigned to this resource group."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -986,7 +1057,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
 }
 impl ResourceProviderOperationList {
diff --git a/services/mgmt/botservice/src/package_2018_07_12/models.rs b/services/mgmt/botservice/src/package_2018_07_12/models.rs
index 7e43b4cc1a..356c4b78b3 100644
--- a/services/mgmt/botservice/src/package_2018_07_12/models.rs
+++ b/services/mgmt/botservice/src/package_2018_07_12/models.rs
@@ -52,10 +52,20 @@ pub struct BotProperties {
     #[serde(rename = "msaAppId")]
     pub msa_app_id: String,
     #[doc = "Collection of channels for which the bot is configured"]
-    #[serde(rename = "configuredChannels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configuredChannels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configured_channels: Vec<String>,
     #[doc = "Collection of channels for which the bot is enabled"]
-    #[serde(rename = "enabledChannels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledChannels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_channels: Vec<String>,
     #[doc = "The Application Insights key"]
     #[serde(rename = "developerAppInsightKey", default, skip_serializing_if = "Option::is_none")]
@@ -67,7 +77,12 @@ pub struct BotProperties {
     #[serde(rename = "developerAppInsightsApplicationId", default, skip_serializing_if = "Option::is_none")]
     pub developer_app_insights_application_id: Option<String>,
     #[doc = "Collection of LUIS App Ids"]
-    #[serde(rename = "luisAppIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "luisAppIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luis_app_ids: Vec<String>,
     #[doc = "The LUIS Key"]
     #[serde(rename = "luisKey", default, skip_serializing_if = "Option::is_none")]
@@ -99,7 +114,11 @@ pub struct BotResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service results and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Bot>,
 }
 impl azure_core::Continuable for BotResponseList {
@@ -132,7 +151,11 @@ pub struct ChannelResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service channel results and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BotChannel>,
 }
 impl azure_core::Continuable for ChannelResponseList {
@@ -239,7 +262,11 @@ pub struct ConnectionSettingProperties {
     #[serde(rename = "serviceProviderDisplayName", default, skip_serializing_if = "Option::is_none")]
     pub service_provider_display_name: Option<String>,
     #[doc = "Service Provider Parameters associated with the Connection Setting"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ConnectionSettingParameter>,
 }
 impl ConnectionSettingProperties {
@@ -254,7 +281,11 @@ pub struct ConnectionSettingResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service connection settings and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectionSetting>,
 }
 impl azure_core::Continuable for ConnectionSettingResponseList {
@@ -286,7 +317,11 @@ impl DirectLineChannel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DirectLineChannelProperties {
     #[doc = "The list of Direct Line sites"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<DirectLineSite>,
 }
 impl DirectLineChannelProperties {
@@ -322,7 +357,12 @@ pub struct DirectLineSite {
     #[serde(rename = "isSecureSiteEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_secure_site_enabled: Option<bool>,
     #[doc = "List of Trusted Origin URLs for this site. This field is applicable only if isSecureSiteEnabled is True."]
-    #[serde(rename = "trustedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_origins: Vec<String>,
 }
 impl DirectLineSite {
@@ -578,7 +618,11 @@ pub struct EnterpriseChannelResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Enterprise Channels and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnterpriseChannel>,
 }
 impl azure_core::Continuable for EnterpriseChannelResponseList {
@@ -644,7 +688,11 @@ pub struct FacebookChannelProperties {
     #[serde(rename = "verifyToken", default, skip_serializing_if = "Option::is_none")]
     pub verify_token: Option<String>,
     #[doc = "The list of Facebook pages"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pages: Vec<FacebookPage>,
     #[doc = "Facebook application id"]
     #[serde(rename = "appId")]
@@ -855,7 +903,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
@@ -960,7 +1012,11 @@ pub struct ServiceProviderProperties {
     #[serde(rename = "iconUrl", default, skip_serializing_if = "Option::is_none")]
     pub icon_url: Option<String>,
     #[doc = "The list of parameters for the Service Provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ServiceProviderParameter>,
 }
 impl ServiceProviderProperties {
@@ -975,7 +1031,11 @@ pub struct ServiceProviderResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service providers and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceProvider>,
 }
 impl ServiceProviderResponseList {
@@ -1294,7 +1354,11 @@ pub struct WebChatChannelProperties {
     #[serde(rename = "webChatEmbedCode", default, skip_serializing_if = "Option::is_none")]
     pub web_chat_embed_code: Option<String>,
     #[doc = "The list of Web Chat sites"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<WebChatSite>,
 }
 impl WebChatChannelProperties {
diff --git a/services/mgmt/botservice/src/package_2020_06_02/models.rs b/services/mgmt/botservice/src/package_2020_06_02/models.rs
index e20c9bfc24..aac2171ae5 100644
--- a/services/mgmt/botservice/src/package_2020_06_02/models.rs
+++ b/services/mgmt/botservice/src/package_2020_06_02/models.rs
@@ -92,10 +92,20 @@ pub struct BotProperties {
     #[serde(rename = "msaAppId")]
     pub msa_app_id: String,
     #[doc = "Collection of channels for which the bot is configured"]
-    #[serde(rename = "configuredChannels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configuredChannels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configured_channels: Vec<String>,
     #[doc = "Collection of channels for which the bot is enabled"]
-    #[serde(rename = "enabledChannels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledChannels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_channels: Vec<String>,
     #[doc = "The Application Insights key"]
     #[serde(rename = "developerAppInsightKey", default, skip_serializing_if = "Option::is_none")]
@@ -107,7 +117,12 @@ pub struct BotProperties {
     #[serde(rename = "developerAppInsightsApplicationId", default, skip_serializing_if = "Option::is_none")]
     pub developer_app_insights_application_id: Option<String>,
     #[doc = "Collection of LUIS App Ids"]
-    #[serde(rename = "luisAppIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "luisAppIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luis_app_ids: Vec<String>,
     #[doc = "The LUIS Key"]
     #[serde(rename = "luisKey", default, skip_serializing_if = "Option::is_none")]
@@ -147,7 +162,11 @@ pub struct BotResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service results and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Bot>,
 }
 impl azure_core::Continuable for BotResponseList {
@@ -180,7 +199,11 @@ pub struct ChannelResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service channel results and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BotChannel>,
 }
 impl azure_core::Continuable for ChannelResponseList {
@@ -287,7 +310,11 @@ pub struct ConnectionSettingProperties {
     #[serde(rename = "serviceProviderDisplayName", default, skip_serializing_if = "Option::is_none")]
     pub service_provider_display_name: Option<String>,
     #[doc = "Service Provider Parameters associated with the Connection Setting"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ConnectionSettingParameter>,
 }
 impl ConnectionSettingProperties {
@@ -302,7 +329,11 @@ pub struct ConnectionSettingResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service connection settings and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectionSetting>,
 }
 impl azure_core::Continuable for ConnectionSettingResponseList {
@@ -334,7 +365,11 @@ impl DirectLineChannel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DirectLineChannelProperties {
     #[doc = "The list of Direct Line sites"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<DirectLineSite>,
 }
 impl DirectLineChannelProperties {
@@ -370,7 +405,12 @@ pub struct DirectLineSite {
     #[serde(rename = "isSecureSiteEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_secure_site_enabled: Option<bool>,
     #[doc = "List of Trusted Origin URLs for this site. This field is applicable only if isSecureSiteEnabled is True."]
-    #[serde(rename = "trustedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_origins: Vec<String>,
 }
 impl DirectLineSite {
@@ -520,7 +560,11 @@ pub struct FacebookChannelProperties {
     #[serde(rename = "verifyToken", default, skip_serializing_if = "Option::is_none")]
     pub verify_token: Option<String>,
     #[doc = "The list of Facebook pages"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pages: Vec<FacebookPage>,
     #[doc = "Facebook application id"]
     #[serde(rename = "appId")]
@@ -785,7 +829,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
@@ -890,7 +938,11 @@ pub struct ServiceProviderProperties {
     #[serde(rename = "iconUrl", default, skip_serializing_if = "Option::is_none")]
     pub icon_url: Option<String>,
     #[doc = "The list of parameters for the Service Provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ServiceProviderParameter>,
 }
 impl ServiceProviderProperties {
@@ -905,7 +957,11 @@ pub struct ServiceProviderResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service providers and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceProvider>,
 }
 impl ServiceProviderResponseList {
@@ -1253,7 +1309,11 @@ pub struct WebChatChannelProperties {
     #[serde(rename = "webChatEmbedCode", default, skip_serializing_if = "Option::is_none")]
     pub web_chat_embed_code: Option<String>,
     #[doc = "The list of Web Chat sites"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<WebChatSite>,
 }
 impl WebChatChannelProperties {
diff --git a/services/mgmt/botservice/src/package_2021_03_01/models.rs b/services/mgmt/botservice/src/package_2021_03_01/models.rs
index 15da5efbe0..c6b0f513d5 100644
--- a/services/mgmt/botservice/src/package_2021_03_01/models.rs
+++ b/services/mgmt/botservice/src/package_2021_03_01/models.rs
@@ -110,10 +110,20 @@ pub struct BotProperties {
     #[serde(rename = "msaAppMSIResourceId", default, skip_serializing_if = "Option::is_none")]
     pub msa_app_msi_resource_id: Option<String>,
     #[doc = "Collection of channels for which the bot is configured"]
-    #[serde(rename = "configuredChannels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configuredChannels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configured_channels: Vec<String>,
     #[doc = "Collection of channels for which the bot is enabled"]
-    #[serde(rename = "enabledChannels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledChannels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_channels: Vec<String>,
     #[doc = "The Application Insights key"]
     #[serde(rename = "developerAppInsightKey", default, skip_serializing_if = "Option::is_none")]
@@ -125,7 +135,12 @@ pub struct BotProperties {
     #[serde(rename = "developerAppInsightsApplicationId", default, skip_serializing_if = "Option::is_none")]
     pub developer_app_insights_application_id: Option<String>,
     #[doc = "Collection of LUIS App Ids"]
-    #[serde(rename = "luisAppIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "luisAppIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luis_app_ids: Vec<String>,
     #[doc = "The LUIS Key"]
     #[serde(rename = "luisKey", default, skip_serializing_if = "Option::is_none")]
@@ -304,7 +319,11 @@ pub struct BotResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service results and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Bot>,
 }
 impl azure_core::Continuable for BotResponseList {
@@ -351,7 +370,11 @@ pub struct ChannelResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service channel results and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BotChannel>,
 }
 impl azure_core::Continuable for ChannelResponseList {
@@ -375,7 +398,11 @@ pub struct ChannelSettings {
     #[serde(rename = "extensionKey2", default, skip_serializing_if = "Option::is_none")]
     pub extension_key2: Option<String>,
     #[doc = "The list of sites"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<Site>,
     #[doc = "The channel id"]
     #[serde(rename = "channelId", default, skip_serializing_if = "Option::is_none")]
@@ -500,7 +527,11 @@ pub struct ConnectionSettingProperties {
     #[serde(rename = "serviceProviderDisplayName", default, skip_serializing_if = "Option::is_none")]
     pub service_provider_display_name: Option<String>,
     #[doc = "Service Provider Parameters associated with the Connection Setting"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ConnectionSettingParameter>,
     #[doc = "Provisioning state of the resource"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -518,7 +549,11 @@ pub struct ConnectionSettingResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service connection settings and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectionSetting>,
 }
 impl azure_core::Continuable for ConnectionSettingResponseList {
@@ -550,7 +585,11 @@ impl DirectLineChannel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DirectLineChannelProperties {
     #[doc = "The list of Direct Line sites"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<DirectLineSite>,
     #[doc = "Direct Line embed code of the resource"]
     #[serde(rename = "DirectLineEmbedCode", default, skip_serializing_if = "Option::is_none")]
@@ -592,7 +631,12 @@ pub struct DirectLineSite {
     #[serde(rename = "isBlockUserUploadEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_block_user_upload_enabled: Option<bool>,
     #[doc = "List of Trusted Origin URLs for this site. This field is applicable only if isSecureSiteEnabled is True."]
-    #[serde(rename = "trustedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_origins: Vec<String>,
 }
 impl DirectLineSite {
@@ -747,7 +791,11 @@ pub struct FacebookChannelProperties {
     #[serde(rename = "verifyToken", default, skip_serializing_if = "Option::is_none")]
     pub verify_token: Option<String>,
     #[doc = "The list of Facebook pages"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pages: Vec<FacebookPage>,
     #[doc = "Facebook application id"]
     #[serde(rename = "appId")]
@@ -1086,7 +1134,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
@@ -1128,7 +1180,11 @@ pub struct Resource {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "Entity zones"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl Resource {
@@ -1227,7 +1283,11 @@ pub struct ServiceProviderProperties {
     #[serde(rename = "iconUrl", default, skip_serializing_if = "Option::is_none")]
     pub icon_url: Option<String>,
     #[doc = "The list of parameters for the Service Provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ServiceProviderParameter>,
 }
 impl ServiceProviderProperties {
@@ -1242,7 +1302,11 @@ pub struct ServiceProviderResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service providers and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceProvider>,
 }
 impl ServiceProviderResponseList {
@@ -1618,7 +1682,11 @@ pub struct WebChatChannelProperties {
     #[serde(rename = "webChatEmbedCode", default, skip_serializing_if = "Option::is_none")]
     pub web_chat_embed_code: Option<String>,
     #[doc = "The list of Web Chat sites"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<WebChatSite>,
 }
 impl WebChatChannelProperties {
diff --git a/services/mgmt/botservice/src/package_preview_2021_05/models.rs b/services/mgmt/botservice/src/package_preview_2021_05/models.rs
index 83b1130520..3f36d52f7c 100644
--- a/services/mgmt/botservice/src/package_preview_2021_05/models.rs
+++ b/services/mgmt/botservice/src/package_preview_2021_05/models.rs
@@ -110,10 +110,20 @@ pub struct BotProperties {
     #[serde(rename = "msaAppMSIResourceId", default, skip_serializing_if = "Option::is_none")]
     pub msa_app_msi_resource_id: Option<String>,
     #[doc = "Collection of channels for which the bot is configured"]
-    #[serde(rename = "configuredChannels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configuredChannels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configured_channels: Vec<String>,
     #[doc = "Collection of channels for which the bot is enabled"]
-    #[serde(rename = "enabledChannels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledChannels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_channels: Vec<String>,
     #[doc = "The Application Insights key"]
     #[serde(rename = "developerAppInsightKey", default, skip_serializing_if = "Option::is_none")]
@@ -125,7 +135,12 @@ pub struct BotProperties {
     #[serde(rename = "developerAppInsightsApplicationId", default, skip_serializing_if = "Option::is_none")]
     pub developer_app_insights_application_id: Option<String>,
     #[doc = "Collection of LUIS App Ids"]
-    #[serde(rename = "luisAppIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "luisAppIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luis_app_ids: Vec<String>,
     #[doc = "The LUIS Key"]
     #[serde(rename = "luisKey", default, skip_serializing_if = "Option::is_none")]
@@ -161,7 +176,12 @@ pub struct BotProperties {
     #[serde(rename = "storageResourceId", default, skip_serializing_if = "Option::is_none")]
     pub storage_resource_id: Option<String>,
     #[doc = "List of Private Endpoint Connections configured for the bot"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The hint to browser (e.g. protocol handler) on how to open the bot for authoring"]
     #[serde(rename = "openWithHint", default, skip_serializing_if = "Option::is_none")]
@@ -308,7 +328,11 @@ pub struct BotResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service results and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Bot>,
 }
 impl azure_core::Continuable for BotResponseList {
@@ -355,7 +379,11 @@ pub struct ChannelResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service channel results and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BotChannel>,
 }
 impl azure_core::Continuable for ChannelResponseList {
@@ -379,7 +407,11 @@ pub struct ChannelSettings {
     #[serde(rename = "extensionKey2", default, skip_serializing_if = "Option::is_none")]
     pub extension_key2: Option<String>,
     #[doc = "The list of sites"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<Site>,
     #[doc = "The channel id"]
     #[serde(rename = "channelId", default, skip_serializing_if = "Option::is_none")]
@@ -504,7 +536,11 @@ pub struct ConnectionSettingProperties {
     #[serde(rename = "serviceProviderDisplayName", default, skip_serializing_if = "Option::is_none")]
     pub service_provider_display_name: Option<String>,
     #[doc = "Service Provider Parameters associated with the Connection Setting"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ConnectionSettingParameter>,
     #[doc = "Provisioning state of the resource"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -522,7 +558,11 @@ pub struct ConnectionSettingResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service connection settings and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectionSetting>,
 }
 impl azure_core::Continuable for ConnectionSettingResponseList {
@@ -554,7 +594,11 @@ impl DirectLineChannel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DirectLineChannelProperties {
     #[doc = "The list of Direct Line sites"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<DirectLineSite>,
     #[doc = "Direct Line embed code of the resource"]
     #[serde(rename = "DirectLineEmbedCode", default, skip_serializing_if = "Option::is_none")]
@@ -596,7 +640,12 @@ pub struct DirectLineSite {
     #[serde(rename = "isBlockUserUploadEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_block_user_upload_enabled: Option<bool>,
     #[doc = "List of Trusted Origin URLs for this site. This field is applicable only if isSecureSiteEnabled is True."]
-    #[serde(rename = "trustedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_origins: Vec<String>,
 }
 impl DirectLineSite {
@@ -751,7 +800,11 @@ pub struct FacebookChannelProperties {
     #[serde(rename = "verifyToken", default, skip_serializing_if = "Option::is_none")]
     pub verify_token: Option<String>,
     #[doc = "The list of Facebook pages"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pages: Vec<FacebookPage>,
     #[doc = "Facebook application id"]
     #[serde(rename = "appId")]
@@ -1090,7 +1143,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
@@ -1201,7 +1258,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -1353,7 +1414,11 @@ impl PrivateLinkResourceBase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -1368,10 +1433,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1425,7 +1500,11 @@ pub struct Resource {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "Entity zones"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl Resource {
@@ -1524,7 +1603,11 @@ pub struct ServiceProviderProperties {
     #[serde(rename = "iconUrl", default, skip_serializing_if = "Option::is_none")]
     pub icon_url: Option<String>,
     #[doc = "The list of parameters for the Service Provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ServiceProviderParameter>,
 }
 impl ServiceProviderProperties {
@@ -1539,7 +1622,11 @@ pub struct ServiceProviderResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service providers and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceProvider>,
 }
 impl ServiceProviderResponseList {
@@ -1919,7 +2006,11 @@ pub struct WebChatChannelProperties {
     #[serde(rename = "webChatEmbedCode", default, skip_serializing_if = "Option::is_none")]
     pub web_chat_embed_code: Option<String>,
     #[doc = "The list of Web Chat sites"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<WebChatSite>,
 }
 impl WebChatChannelProperties {
diff --git a/services/mgmt/botservice/src/package_preview_2022_06/models.rs b/services/mgmt/botservice/src/package_preview_2022_06/models.rs
index d74fe63387..057b208492 100644
--- a/services/mgmt/botservice/src/package_preview_2022_06/models.rs
+++ b/services/mgmt/botservice/src/package_preview_2022_06/models.rs
@@ -110,10 +110,20 @@ pub struct BotProperties {
     #[serde(rename = "msaAppMSIResourceId", default, skip_serializing_if = "Option::is_none")]
     pub msa_app_msi_resource_id: Option<String>,
     #[doc = "Collection of channels for which the bot is configured"]
-    #[serde(rename = "configuredChannels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configuredChannels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configured_channels: Vec<String>,
     #[doc = "Collection of channels for which the bot is enabled"]
-    #[serde(rename = "enabledChannels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enabledChannels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enabled_channels: Vec<String>,
     #[doc = "The Application Insights key"]
     #[serde(rename = "developerAppInsightKey", default, skip_serializing_if = "Option::is_none")]
@@ -125,7 +135,12 @@ pub struct BotProperties {
     #[serde(rename = "developerAppInsightsApplicationId", default, skip_serializing_if = "Option::is_none")]
     pub developer_app_insights_application_id: Option<String>,
     #[doc = "Collection of LUIS App Ids"]
-    #[serde(rename = "luisAppIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "luisAppIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luis_app_ids: Vec<String>,
     #[doc = "The LUIS Key"]
     #[serde(rename = "luisKey", default, skip_serializing_if = "Option::is_none")]
@@ -164,7 +179,12 @@ pub struct BotProperties {
     #[serde(rename = "storageResourceId", default, skip_serializing_if = "Option::is_none")]
     pub storage_resource_id: Option<String>,
     #[doc = "List of Private Endpoint Connections configured for the bot"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The hint to browser (e.g. protocol handler) on how to open the bot for authoring"]
     #[serde(rename = "openWithHint", default, skip_serializing_if = "Option::is_none")]
@@ -312,7 +332,11 @@ pub struct BotResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service results and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Bot>,
 }
 impl azure_core::Continuable for BotResponseList {
@@ -359,7 +383,11 @@ pub struct ChannelResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service channel results and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BotChannel>,
 }
 impl azure_core::Continuable for ChannelResponseList {
@@ -383,7 +411,11 @@ pub struct ChannelSettings {
     #[serde(rename = "extensionKey2", default, skip_serializing_if = "Option::is_none")]
     pub extension_key2: Option<String>,
     #[doc = "The list of sites"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<Site>,
     #[doc = "The channel id"]
     #[serde(rename = "channelId", default, skip_serializing_if = "Option::is_none")]
@@ -508,7 +540,11 @@ pub struct ConnectionSettingProperties {
     #[serde(rename = "serviceProviderDisplayName", default, skip_serializing_if = "Option::is_none")]
     pub service_provider_display_name: Option<String>,
     #[doc = "Service Provider Parameters associated with the Connection Setting"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ConnectionSettingParameter>,
     #[doc = "Provisioning state of the resource"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -526,7 +562,11 @@ pub struct ConnectionSettingResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service connection settings and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectionSetting>,
 }
 impl azure_core::Continuable for ConnectionSettingResponseList {
@@ -588,7 +628,11 @@ impl DirectLineChannel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DirectLineChannelProperties {
     #[doc = "The list of Direct Line sites"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<DirectLineSite>,
     #[doc = "The extensionKey1"]
     #[serde(rename = "extensionKey1", default, skip_serializing_if = "Option::is_none")]
@@ -759,7 +803,11 @@ pub struct FacebookChannelProperties {
     #[serde(rename = "verifyToken", default, skip_serializing_if = "Option::is_none")]
     pub verify_token: Option<String>,
     #[doc = "The list of Facebook pages"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pages: Vec<FacebookPage>,
     #[doc = "Facebook application id"]
     #[serde(rename = "appId")]
@@ -1098,7 +1146,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
@@ -1220,7 +1272,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -1372,7 +1428,11 @@ impl PrivateLinkResourceBase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -1387,10 +1447,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1480,7 +1550,11 @@ pub struct Resource {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "Entity zones"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl Resource {
@@ -1579,7 +1653,11 @@ pub struct ServiceProviderProperties {
     #[serde(rename = "iconUrl", default, skip_serializing_if = "Option::is_none")]
     pub icon_url: Option<String>,
     #[doc = "The list of parameters for the Service Provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ServiceProviderParameter>,
 }
 impl ServiceProviderProperties {
@@ -1594,7 +1672,11 @@ pub struct ServiceProviderResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of bot service providers and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceProvider>,
 }
 impl ServiceProviderResponseList {
@@ -1651,7 +1733,12 @@ pub struct Site {
     #[serde(rename = "isSecureSiteEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_secure_site_enabled: Option<bool>,
     #[doc = "List of Trusted Origin URLs for this site. This field is applicable only if isSecureSiteEnabled is True."]
-    #[serde(rename = "trustedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_origins: Vec<String>,
     #[doc = "Whether this site is enabled for preview versions of Webchat"]
     #[serde(rename = "isWebchatPreviewEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -2028,7 +2115,11 @@ pub struct WebChatChannelProperties {
     #[serde(rename = "webChatEmbedCode", default, skip_serializing_if = "Option::is_none")]
     pub web_chat_embed_code: Option<String>,
     #[doc = "The list of Web Chat sites"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<WebChatSite>,
 }
 impl WebChatChannelProperties {
diff --git a/services/mgmt/cdn/src/package_2019_12/models.rs b/services/mgmt/cdn/src/package_2019_12/models.rs
index 3124cf3e30..d96f56b8ca 100644
--- a/services/mgmt/cdn/src/package_2019_12/models.rs
+++ b/services/mgmt/cdn/src/package_2019_12/models.rs
@@ -318,10 +318,19 @@ pub struct CookiesMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl CookiesMatchConditionParameters {
@@ -525,7 +534,11 @@ pub mod custom_domain_https_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomDomainListResult {
     #[doc = "List of CDN CustomDomains within an endpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomDomain>,
     #[doc = "URL to get the next set of custom domain objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -872,7 +885,11 @@ pub struct DeliveryRule {
     #[doc = "The order in which the rules are applied for the endpoint. Possible values {0,1,2,3,………}. A rule with a lesser order will be applied before a rule with a greater order. Rule with order 0 is a special rule. It does not require any condition and actions listed in it will always be applied."]
     pub order: i64,
     #[doc = "A list of conditions that must be matched for the actions to be executed"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<DeliveryRuleCondition>,
     #[doc = "A list of actions that are executed when all the conditions of a rule are satisfied."]
     pub actions: Vec<DeliveryRuleAction>,
@@ -1341,7 +1358,11 @@ impl EdgeNodeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EdgenodeResult {
     #[doc = "Edge node of CDN service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EdgeNode>,
     #[doc = "URL to get the next set of edgenode list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1379,7 +1400,11 @@ impl Endpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EndpointListResult {
     #[doc = "List of CDN endpoints within a profile"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Endpoint>,
     #[doc = "URL to get the next set of endpoint objects if there is any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1407,7 +1432,12 @@ pub struct EndpointProperties {
     #[doc = "The source of the content being delivered via CDN."]
     pub origins: Vec<DeepCreatedOrigin>,
     #[doc = "The origin groups comprising of origins that are used for load balancing the traffic based on availability."]
-    #[serde(rename = "originGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "originGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origin_groups: Vec<DeepCreatedOriginGroup>,
     #[doc = "Resource status of the endpoint."]
     #[serde(rename = "resourceState", default, skip_serializing_if = "Option::is_none")]
@@ -1483,7 +1513,12 @@ pub struct EndpointPropertiesUpdateParameters {
     #[serde(rename = "originPath", default, skip_serializing_if = "Option::is_none")]
     pub origin_path: Option<String>,
     #[doc = "List of content types on which compression applies. The value should be a valid MIME type."]
-    #[serde(rename = "contentTypesToCompress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentTypesToCompress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_types_to_compress: Vec<String>,
     #[doc = "The host header value sent to the origin with each request. This property at Endpoint can only be set allowed when endpoint uses single origin. If you leave this blank, the request hostname determines this value. Azure CDN origins, such as Web Apps, Blob Storage, and Cloud Services require this host header value to match the origin hostname by default."]
     #[serde(rename = "originHostHeader", default, skip_serializing_if = "Option::is_none")]
@@ -1507,7 +1542,12 @@ pub struct EndpointPropertiesUpdateParameters {
     #[serde(rename = "probePath", default, skip_serializing_if = "Option::is_none")]
     pub probe_path: Option<String>,
     #[doc = "List of rules defining the user's geo access within a CDN endpoint. Each geo filter defines an access rule to a specified path or content, e.g. block APAC for path /pictures/"]
-    #[serde(rename = "geoFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "geoFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub geo_filters: Vec<GeoFilter>,
     #[doc = "Reference to another resource."]
     #[serde(rename = "defaultOriginGroup", default, skip_serializing_if = "Option::is_none")]
@@ -1746,7 +1786,12 @@ pub struct HttpVersionMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
 }
 impl HttpVersionMatchConditionParameters {
@@ -1812,10 +1857,20 @@ pub struct IpAddressGroup {
     #[serde(rename = "deliveryRegion", default, skip_serializing_if = "Option::is_none")]
     pub delivery_region: Option<String>,
     #[doc = "The list of ip v4 addresses."]
-    #[serde(rename = "ipv4Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv4Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv4_addresses: Vec<CidrIpAddress>,
     #[doc = "The list of ip v6 addresses."]
-    #[serde(rename = "ipv6Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv6Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv6_addresses: Vec<CidrIpAddress>,
 }
 impl IpAddressGroup {
@@ -1834,10 +1889,19 @@ pub struct IsDeviceMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl IsDeviceMatchConditionParameters {
@@ -2076,7 +2140,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "List of CDN operations supported by the CDN resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2168,7 +2236,11 @@ impl OriginGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OriginGroupListResult {
     #[doc = "List of CDN origin groups within an endpoint"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OriginGroup>,
     #[doc = "URL to get the next set of origin objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2305,7 +2377,11 @@ pub struct OriginGroupUpdatePropertiesParameters {
     #[serde(rename = "healthProbeSettings", default, skip_serializing_if = "Option::is_none")]
     pub health_probe_settings: Option<HealthProbeParameters>,
     #[doc = "The source of the content being delivered via CDN within given origin group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<ResourceReference>,
     #[doc = "Time in minutes to shift the traffic to the endpoint gradually when an unhealthy endpoint comes healthy or a new endpoint is added. Default is 10 mins. This property is currently not supported."]
     #[serde(
@@ -2331,7 +2407,11 @@ impl OriginGroupUpdatePropertiesParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OriginListResult {
     #[doc = "List of CDN origins within an endpoint"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Origin>,
     #[doc = "URL to get the next set of origin objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2467,10 +2547,19 @@ pub struct PostArgsMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl PostArgsMatchConditionParameters {
@@ -2571,7 +2660,11 @@ impl Profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileListResult {
     #[doc = "List of CDN profiles within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Profile>,
     #[doc = "URL to get the next set of profile objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2701,10 +2794,19 @@ pub struct QueryStringMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl QueryStringMatchConditionParameters {
@@ -2791,10 +2893,19 @@ pub struct RemoteAddressMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "Match values to match against. The operator will apply to each value in here with OR semantics. If any of them match the variable with the given operator this match condition is considered a match."]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RemoteAddressMatchConditionParameters {
@@ -2870,10 +2981,19 @@ pub struct RequestBodyMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RequestBodyMatchConditionParameters {
@@ -2963,10 +3083,19 @@ pub struct RequestHeaderMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RequestHeaderMatchConditionParameters {
@@ -3054,7 +3183,12 @@ pub struct RequestMethodMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
 }
 impl RequestMethodMatchConditionParameters {
@@ -3124,7 +3258,12 @@ pub struct RequestSchemeMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
 }
 impl RequestSchemeMatchConditionParameters {
@@ -3164,10 +3303,19 @@ pub struct RequestUriMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RequestUriMatchConditionParameters {
@@ -3304,7 +3452,11 @@ impl ResourceUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceUsageListResult {
     #[doc = "List of resource usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceUsage>,
     #[doc = "URL to get the next set of custom domain objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3335,7 +3487,12 @@ pub struct ResponseBasedOriginErrorDetectionParameters {
     )]
     pub response_based_failover_threshold_percentage: Option<i64>,
     #[doc = "The list of Http status code ranges that are considered as server errors for origin and it is marked as unhealthy."]
-    #[serde(rename = "httpErrorRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpErrorRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_error_ranges: Vec<HttpErrorRangeParameters>,
 }
 impl ResponseBasedOriginErrorDetectionParameters {
@@ -3438,7 +3595,12 @@ impl SsoUri {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedOptimizationTypesListResult {
     #[doc = "Supported optimization types for a profile."]
-    #[serde(rename = "supportedOptimizationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOptimizationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_optimization_types: Vec<OptimizationType>,
 }
 impl SupportedOptimizationTypesListResult {
@@ -3477,10 +3639,19 @@ pub struct UrlFileExtensionMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl UrlFileExtensionMatchConditionParameters {
@@ -3567,10 +3738,19 @@ pub struct UrlFileNameMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl UrlFileNameMatchConditionParameters {
@@ -3657,10 +3837,19 @@ pub struct UrlPathMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl UrlPathMatchConditionParameters {
diff --git a/services/mgmt/cdn/src/package_2020_04/models.rs b/services/mgmt/cdn/src/package_2020_04/models.rs
index 27a110fe73..999ae78d9c 100644
--- a/services/mgmt/cdn/src/package_2020_04/models.rs
+++ b/services/mgmt/cdn/src/package_2020_04/models.rs
@@ -353,7 +353,11 @@ impl CdnWebApplicationFirewallPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CdnWebApplicationFirewallPolicyList {
     #[doc = "List of Azure CDN WebApplicationFirewallPolicies within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CdnWebApplicationFirewallPolicy>,
     #[doc = "URL to get the next set of WebApplicationFirewallPolicy objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -398,7 +402,12 @@ pub struct CdnWebApplicationFirewallPolicyProperties {
     #[serde(rename = "managedRules", default, skip_serializing_if = "Option::is_none")]
     pub managed_rules: Option<ManagedRuleSetList>,
     #[doc = "Describes Azure CDN endpoints associated with this Web Application Firewall policy."]
-    #[serde(rename = "endpointLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_links: Vec<CdnEndpoint>,
     #[doc = "Provisioning state of the WebApplicationFirewallPolicy."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -543,10 +552,19 @@ pub struct CookiesMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl CookiesMatchConditionParameters {
@@ -750,7 +768,11 @@ pub mod custom_domain_https_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomDomainListResult {
     #[doc = "List of CDN CustomDomains within an endpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomDomain>,
     #[doc = "URL to get the next set of custom domain objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1060,7 +1082,11 @@ pub mod custom_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRuleList {
     #[doc = "List of rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<CustomRule>,
 }
 impl CustomRuleList {
@@ -1192,7 +1218,11 @@ pub struct DeliveryRule {
     #[doc = "The order in which the rules are applied for the endpoint. Possible values {0,1,2,3,………}. A rule with a lesser order will be applied before a rule with a greater order. Rule with order 0 is a special rule. It does not require any condition and actions listed in it will always be applied."]
     pub order: i64,
     #[doc = "A list of conditions that must be matched for the actions to be executed"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<DeliveryRuleCondition>,
     #[doc = "A list of actions that are executed when all the conditions of a rule are satisfied."]
     pub actions: Vec<DeliveryRuleAction>,
@@ -1661,7 +1691,11 @@ impl EdgeNodeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EdgenodeResult {
     #[doc = "Edge node of CDN service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EdgeNode>,
     #[doc = "URL to get the next set of edgenode list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1699,7 +1733,11 @@ impl Endpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EndpointListResult {
     #[doc = "List of CDN endpoints within a profile"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Endpoint>,
     #[doc = "URL to get the next set of endpoint objects if there is any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1727,7 +1765,12 @@ pub struct EndpointProperties {
     #[doc = "The source of the content being delivered via CDN."]
     pub origins: Vec<DeepCreatedOrigin>,
     #[doc = "The origin groups comprising of origins that are used for load balancing the traffic based on availability."]
-    #[serde(rename = "originGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "originGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origin_groups: Vec<DeepCreatedOriginGroup>,
     #[doc = "Resource status of the endpoint."]
     #[serde(rename = "resourceState", default, skip_serializing_if = "Option::is_none")]
@@ -1803,7 +1846,12 @@ pub struct EndpointPropertiesUpdateParameters {
     #[serde(rename = "originPath", default, skip_serializing_if = "Option::is_none")]
     pub origin_path: Option<String>,
     #[doc = "List of content types on which compression applies. The value should be a valid MIME type."]
-    #[serde(rename = "contentTypesToCompress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentTypesToCompress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_types_to_compress: Vec<String>,
     #[doc = "The host header value sent to the origin with each request. This property at Endpoint is only allowed when endpoint uses single origin and can be overridden by the same property specified at origin.If you leave this blank, the request hostname determines this value. Azure CDN origins, such as Web Apps, Blob Storage, and Cloud Services require this host header value to match the origin hostname by default."]
     #[serde(rename = "originHostHeader", default, skip_serializing_if = "Option::is_none")]
@@ -1827,13 +1875,23 @@ pub struct EndpointPropertiesUpdateParameters {
     #[serde(rename = "probePath", default, skip_serializing_if = "Option::is_none")]
     pub probe_path: Option<String>,
     #[doc = "List of rules defining the user's geo access within a CDN endpoint. Each geo filter defines an access rule to a specified path or content, e.g. block APAC for path /pictures/"]
-    #[serde(rename = "geoFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "geoFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub geo_filters: Vec<GeoFilter>,
     #[doc = "Reference to another resource."]
     #[serde(rename = "defaultOriginGroup", default, skip_serializing_if = "Option::is_none")]
     pub default_origin_group: Option<ResourceReference>,
     #[doc = "List of keys used to validate the signed URL hashes."]
-    #[serde(rename = "urlSigningKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "urlSigningKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub url_signing_keys: Vec<UrlSigningKey>,
     #[doc = "A policy that specifies the delivery rules to be used for an endpoint."]
     #[serde(rename = "deliveryPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -2084,7 +2142,12 @@ pub struct HttpVersionMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
 }
 impl HttpVersionMatchConditionParameters {
@@ -2150,10 +2213,20 @@ pub struct IpAddressGroup {
     #[serde(rename = "deliveryRegion", default, skip_serializing_if = "Option::is_none")]
     pub delivery_region: Option<String>,
     #[doc = "The list of ip v4 addresses."]
-    #[serde(rename = "ipv4Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv4Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv4_addresses: Vec<CidrIpAddress>,
     #[doc = "The list of ip v6 addresses."]
-    #[serde(rename = "ipv6Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv6Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv6_addresses: Vec<CidrIpAddress>,
 }
 impl IpAddressGroup {
@@ -2172,10 +2245,19 @@ pub struct IsDeviceMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl IsDeviceMatchConditionParameters {
@@ -2447,7 +2529,11 @@ pub struct ManagedRuleGroupDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of rules within the managed rule group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleDefinition>,
 }
 impl ManagedRuleGroupDefinition {
@@ -2462,7 +2548,11 @@ pub struct ManagedRuleGroupOverride {
     #[serde(rename = "ruleGroupName")]
     pub rule_group_name: String,
     #[doc = "List of rules that will be disabled. If none specified, all rules in the group will be disabled."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleOverride>,
 }
 impl ManagedRuleGroupOverride {
@@ -2548,7 +2638,12 @@ pub struct ManagedRuleSet {
     #[serde(rename = "anomalyScore", default, skip_serializing_if = "Option::is_none")]
     pub anomaly_score: Option<i64>,
     #[doc = "Defines the rule overrides to apply to the rule set."]
-    #[serde(rename = "ruleGroupOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroupOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_group_overrides: Vec<ManagedRuleGroupOverride>,
 }
 impl ManagedRuleSet {
@@ -2582,7 +2677,11 @@ impl ManagedRuleSetDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetDefinitionList {
     #[doc = "List of managed rule set definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedRuleSetDefinition>,
     #[doc = "URL to retrieve next set of managed rule set definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2612,7 +2711,12 @@ pub struct ManagedRuleSetDefinitionProperties {
     #[serde(rename = "ruleSetVersion", default, skip_serializing_if = "Option::is_none")]
     pub rule_set_version: Option<String>,
     #[doc = "Rule groups of the managed rule set."]
-    #[serde(rename = "ruleGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_groups: Vec<ManagedRuleGroupDefinition>,
 }
 impl ManagedRuleSetDefinitionProperties {
@@ -2624,7 +2728,12 @@ impl ManagedRuleSetDefinitionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetList {
     #[doc = "List of rule sets."]
-    #[serde(rename = "managedRuleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedRuleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_rule_sets: Vec<ManagedRuleSet>,
 }
 impl ManagedRuleSetList {
@@ -2650,7 +2759,11 @@ pub struct MatchCondition {
     #[serde(rename = "matchValue")]
     pub match_value: Vec<String>,
     #[doc = "List of transforms."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<TransformType>,
 }
 impl MatchCondition {
@@ -2817,7 +2930,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "List of CDN operations supported by the CDN resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2909,7 +3026,11 @@ impl OriginGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OriginGroupListResult {
     #[doc = "List of CDN origin groups within an endpoint"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OriginGroup>,
     #[doc = "URL to get the next set of origin objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3008,7 +3129,11 @@ pub struct OriginGroupUpdatePropertiesParameters {
     #[serde(rename = "healthProbeSettings", default, skip_serializing_if = "Option::is_none")]
     pub health_probe_settings: Option<HealthProbeParameters>,
     #[doc = "The source of the content being delivered via CDN within given origin group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<ResourceReference>,
     #[doc = "Time in minutes to shift the traffic to the endpoint gradually when an unhealthy endpoint comes healthy or a new endpoint is added. Default is 10 mins. This property is currently not supported."]
     #[serde(
@@ -3034,7 +3159,11 @@ impl OriginGroupUpdatePropertiesParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OriginListResult {
     #[doc = "List of CDN origins within an endpoint"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Origin>,
     #[doc = "URL to get the next set of origin objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3229,10 +3358,19 @@ pub struct PostArgsMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl PostArgsMatchConditionParameters {
@@ -3333,7 +3471,11 @@ impl Profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileListResult {
     #[doc = "List of CDN profiles within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Profile>,
     #[doc = "URL to get the next set of profile objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3463,10 +3605,19 @@ pub struct QueryStringMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl QueryStringMatchConditionParameters {
@@ -3567,7 +3718,11 @@ impl RateLimitRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RateLimitRuleList {
     #[doc = "List of rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<RateLimitRule>,
 }
 impl RateLimitRuleList {
@@ -3586,10 +3741,19 @@ pub struct RemoteAddressMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "Match values to match against. The operator will apply to each value in here with OR semantics. If any of them match the variable with the given operator this match condition is considered a match."]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RemoteAddressMatchConditionParameters {
@@ -3665,10 +3829,19 @@ pub struct RequestBodyMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RequestBodyMatchConditionParameters {
@@ -3758,10 +3931,19 @@ pub struct RequestHeaderMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RequestHeaderMatchConditionParameters {
@@ -3849,7 +4031,12 @@ pub struct RequestMethodMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
 }
 impl RequestMethodMatchConditionParameters {
@@ -3919,7 +4106,12 @@ pub struct RequestSchemeMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
 }
 impl RequestSchemeMatchConditionParameters {
@@ -3959,10 +4151,19 @@ pub struct RequestUriMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RequestUriMatchConditionParameters {
@@ -4099,7 +4300,11 @@ impl ResourceUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceUsageListResult {
     #[doc = "List of resource usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceUsage>,
     #[doc = "URL to get the next set of custom domain objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4130,7 +4335,12 @@ pub struct ResponseBasedOriginErrorDetectionParameters {
     )]
     pub response_based_failover_threshold_percentage: Option<i64>,
     #[doc = "The list of Http status code ranges that are considered as server errors for origin and it is marked as unhealthy."]
-    #[serde(rename = "httpErrorRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpErrorRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_error_ranges: Vec<HttpErrorRangeParameters>,
 }
 impl ResponseBasedOriginErrorDetectionParameters {
@@ -4233,7 +4443,12 @@ impl SsoUri {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedOptimizationTypesListResult {
     #[doc = "Supported optimization types for a profile."]
-    #[serde(rename = "supportedOptimizationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOptimizationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_optimization_types: Vec<OptimizationType>,
 }
 impl SupportedOptimizationTypesListResult {
@@ -4317,10 +4532,19 @@ pub struct UrlFileExtensionMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl UrlFileExtensionMatchConditionParameters {
@@ -4407,10 +4631,19 @@ pub struct UrlFileNameMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl UrlFileNameMatchConditionParameters {
@@ -4497,10 +4730,19 @@ pub struct UrlPathMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl UrlPathMatchConditionParameters {
@@ -4795,10 +5037,20 @@ pub struct UrlSigningActionParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub algorithm: Option<url_signing_action_parameters::Algorithm>,
     #[doc = "Defines which query string parameters in the url to be considered for expires, key id etc. "]
-    #[serde(rename = "parameterNameOverride", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parameterNameOverride",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameter_name_override: Vec<UrlSigningParamIdentifier>,
     #[doc = "Match values to match against. Supports CIDR ranges (both IPv4 and IPv6)."]
-    #[serde(rename = "ipSubnets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipSubnets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_subnets: Vec<String>,
 }
 impl UrlSigningActionParameters {
diff --git a/services/mgmt/cdn/src/package_2020_09/models.rs b/services/mgmt/cdn/src/package_2020_09/models.rs
index d006688c3c..e53a212e2e 100644
--- a/services/mgmt/cdn/src/package_2020_09/models.rs
+++ b/services/mgmt/cdn/src/package_2020_09/models.rs
@@ -91,7 +91,11 @@ pub mod afd_domain_https_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AfdDomainListResult {
     #[doc = "List of AzureFrontDoor domains within a profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AfdDomain>,
     #[doc = "URL to get the next set of domain objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -232,7 +236,11 @@ impl AfdEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AfdEndpointListResult {
     #[doc = "List of AzureFrontDoor endpoints within a profile"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AfdEndpoint>,
     #[doc = "URL to get the next set of endpoint objects if there is any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -404,7 +412,11 @@ impl AfdOriginGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AfdOriginGroupListResult {
     #[doc = "List of CDN origin groups within an endpoint"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AfdOriginGroup>,
     #[doc = "URL to get the next set of origin objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -522,7 +534,11 @@ pub mod afd_origin_group_update_properties_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AfdOriginListResult {
     #[doc = "List of CDN origins within an endpoint"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AfdOrigin>,
     #[doc = "URL to get the next set of origin objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -809,7 +825,11 @@ pub struct AfdPurgeParameters {
     #[serde(rename = "contentPaths")]
     pub content_paths: Vec<String>,
     #[doc = "List of domains."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domains: Vec<String>,
 }
 impl AfdPurgeParameters {
@@ -1129,7 +1149,11 @@ impl CdnWebApplicationFirewallPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CdnWebApplicationFirewallPolicyList {
     #[doc = "List of Azure CDN WebApplicationFirewallPolicies within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CdnWebApplicationFirewallPolicy>,
     #[doc = "URL to get the next set of WebApplicationFirewallPolicy objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1174,7 +1198,12 @@ pub struct CdnWebApplicationFirewallPolicyProperties {
     #[serde(rename = "managedRules", default, skip_serializing_if = "Option::is_none")]
     pub managed_rules: Option<ManagedRuleSetList>,
     #[doc = "Describes Azure CDN endpoints associated with this Web Application Firewall policy."]
-    #[serde(rename = "endpointLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_links: Vec<CdnEndpoint>,
     #[doc = "Provisioning state of the WebApplicationFirewallPolicy."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1327,7 +1356,12 @@ impl CheckNameAvailabilityOutput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CompressionSettings {
     #[doc = "List of content types on which compression applies. The value should be a valid MIME type."]
-    #[serde(rename = "contentTypesToCompress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentTypesToCompress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_types_to_compress: Vec<String>,
     #[doc = "Indicates whether content compression is enabled on AzureFrontDoor. Default value is false. If compression is enabled, content will be served as compressed if user requests for a compressed version. Content won't be compressed on AzureFrontDoor when requested content is smaller than 1 byte or larger than 1 MB."]
     #[serde(rename = "isCompressionEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -1341,9 +1375,18 @@ impl CompressionSettings {
 #[doc = "Continents Response"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContinentsResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub continents: Vec<serde_json::Value>,
-    #[serde(rename = "countryOrRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "countryOrRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub country_or_regions: Vec<serde_json::Value>,
 }
 impl ContinentsResponse {
@@ -1365,10 +1408,19 @@ pub struct CookiesMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl CookiesMatchConditionParameters {
@@ -1574,7 +1626,11 @@ pub mod custom_domain_https_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomDomainListResult {
     #[doc = "List of CDN CustomDomains within an endpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomDomain>,
     #[doc = "URL to get the next set of custom domain objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1884,7 +1940,11 @@ pub mod custom_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRuleList {
     #[doc = "List of rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<CustomRule>,
 }
 impl CustomRuleList {
@@ -1910,7 +1970,12 @@ pub struct CustomerCertificate {
     #[serde(rename = "useLatestVersion", default, skip_serializing_if = "Option::is_none")]
     pub use_latest_version: Option<bool>,
     #[doc = "The list of SANs."]
-    #[serde(rename = "subjectAlternativeNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subjectAlternativeNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subject_alternative_names: Vec<String>,
 }
 impl CustomerCertificate {
@@ -1943,7 +2008,12 @@ pub struct CustomerCertificateParameters {
     #[serde(rename = "useLatestVersion", default, skip_serializing_if = "Option::is_none")]
     pub use_latest_version: Option<bool>,
     #[doc = "The list of SANs."]
-    #[serde(rename = "subjectAlternativeNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subjectAlternativeNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subject_alternative_names: Vec<String>,
 }
 impl CustomerCertificateParameters {
@@ -2082,7 +2152,11 @@ pub struct DeliveryRule {
     #[doc = "The order in which the rules are applied for the endpoint. Possible values {0,1,2,3,………}. A rule with a lesser order will be applied before a rule with a greater order. Rule with order 0 is a special rule. It does not require any condition and actions listed in it will always be applied."]
     pub order: i64,
     #[doc = "A list of conditions that must be matched for the actions to be executed"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<DeliveryRuleCondition>,
     #[doc = "A list of actions that are executed when all the conditions of a rule are satisfied."]
     pub actions: Vec<DeliveryRuleAction>,
@@ -2568,7 +2642,11 @@ impl EdgeNodeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EdgenodeResult {
     #[doc = "Edge node of CDN service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EdgeNode>,
     #[doc = "URL to get the next set of edgenode list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2606,7 +2684,11 @@ impl Endpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EndpointListResult {
     #[doc = "List of CDN endpoints within a profile"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Endpoint>,
     #[doc = "URL to get the next set of endpoint objects if there is any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2634,7 +2716,12 @@ pub struct EndpointProperties {
     #[doc = "The source of the content being delivered via CDN."]
     pub origins: Vec<DeepCreatedOrigin>,
     #[doc = "The origin groups comprising of origins that are used for load balancing the traffic based on availability."]
-    #[serde(rename = "originGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "originGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origin_groups: Vec<DeepCreatedOriginGroup>,
     #[doc = "Resource status of the endpoint."]
     #[serde(rename = "resourceState", default, skip_serializing_if = "Option::is_none")]
@@ -2710,7 +2797,12 @@ pub struct EndpointPropertiesUpdateParameters {
     #[serde(rename = "originPath", default, skip_serializing_if = "Option::is_none")]
     pub origin_path: Option<String>,
     #[doc = "List of content types on which compression applies. The value should be a valid MIME type."]
-    #[serde(rename = "contentTypesToCompress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentTypesToCompress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_types_to_compress: Vec<String>,
     #[doc = "The host header value sent to the origin with each request. This property at Endpoint is only allowed when endpoint uses single origin and can be overridden by the same property specified at origin.If you leave this blank, the request hostname determines this value. Azure CDN origins, such as Web Apps, Blob Storage, and Cloud Services require this host header value to match the origin hostname by default."]
     #[serde(rename = "originHostHeader", default, skip_serializing_if = "Option::is_none")]
@@ -2734,13 +2826,23 @@ pub struct EndpointPropertiesUpdateParameters {
     #[serde(rename = "probePath", default, skip_serializing_if = "Option::is_none")]
     pub probe_path: Option<String>,
     #[doc = "List of rules defining the user's geo access within a CDN endpoint. Each geo filter defines an access rule to a specified path or content, e.g. block APAC for path /pictures/"]
-    #[serde(rename = "geoFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "geoFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub geo_filters: Vec<GeoFilter>,
     #[doc = "Reference to another resource."]
     #[serde(rename = "defaultOriginGroup", default, skip_serializing_if = "Option::is_none")]
     pub default_origin_group: Option<ResourceReference>,
     #[doc = "List of keys used to validate the signed URL hashes."]
-    #[serde(rename = "urlSigningKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "urlSigningKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub url_signing_keys: Vec<UrlSigningKey>,
     #[doc = "A policy that specifies the delivery rules to be used for an endpoint."]
     #[serde(rename = "deliveryPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -2991,7 +3093,12 @@ pub struct HttpVersionMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
 }
 impl HttpVersionMatchConditionParameters {
@@ -3102,10 +3209,20 @@ pub struct IpAddressGroup {
     #[serde(rename = "deliveryRegion", default, skip_serializing_if = "Option::is_none")]
     pub delivery_region: Option<String>,
     #[doc = "The list of ip v4 addresses."]
-    #[serde(rename = "ipv4Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv4Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv4_addresses: Vec<CidrIpAddress>,
     #[doc = "The list of ip v6 addresses."]
-    #[serde(rename = "ipv6Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv6Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv6_addresses: Vec<CidrIpAddress>,
 }
 impl IpAddressGroup {
@@ -3124,10 +3241,19 @@ pub struct IsDeviceMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl IsDeviceMatchConditionParameters {
@@ -3439,7 +3565,11 @@ pub struct ManagedRuleGroupDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of rules within the managed rule group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleDefinition>,
 }
 impl ManagedRuleGroupDefinition {
@@ -3454,7 +3584,11 @@ pub struct ManagedRuleGroupOverride {
     #[serde(rename = "ruleGroupName")]
     pub rule_group_name: String,
     #[doc = "List of rules that will be disabled. If none specified, all rules in the group will be disabled."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleOverride>,
 }
 impl ManagedRuleGroupOverride {
@@ -3540,7 +3674,12 @@ pub struct ManagedRuleSet {
     #[serde(rename = "anomalyScore", default, skip_serializing_if = "Option::is_none")]
     pub anomaly_score: Option<i64>,
     #[doc = "Defines the rule overrides to apply to the rule set."]
-    #[serde(rename = "ruleGroupOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroupOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_group_overrides: Vec<ManagedRuleGroupOverride>,
 }
 impl ManagedRuleSet {
@@ -3574,7 +3713,11 @@ impl ManagedRuleSetDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetDefinitionList {
     #[doc = "List of managed rule set definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedRuleSetDefinition>,
     #[doc = "URL to retrieve next set of managed rule set definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3604,7 +3747,12 @@ pub struct ManagedRuleSetDefinitionProperties {
     #[serde(rename = "ruleSetVersion", default, skip_serializing_if = "Option::is_none")]
     pub rule_set_version: Option<String>,
     #[doc = "Rule groups of the managed rule set."]
-    #[serde(rename = "ruleGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_groups: Vec<ManagedRuleGroupDefinition>,
 }
 impl ManagedRuleSetDefinitionProperties {
@@ -3616,7 +3764,12 @@ impl ManagedRuleSetDefinitionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetList {
     #[doc = "List of rule sets."]
-    #[serde(rename = "managedRuleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedRuleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_rule_sets: Vec<ManagedRuleSet>,
 }
 impl ManagedRuleSetList {
@@ -3642,7 +3795,11 @@ pub struct MatchCondition {
     #[serde(rename = "matchValue")]
     pub match_value: Vec<String>,
     #[doc = "List of transforms."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<TransformType>,
 }
 impl MatchCondition {
@@ -3778,7 +3935,11 @@ pub struct MetricsResponse {
     pub date_time_end: Option<time::OffsetDateTime>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub granularity: Option<metrics_response::Granularity>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub series: Vec<serde_json::Value>,
 }
 impl MetricsResponse {
@@ -3838,7 +3999,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "List of CDN operations supported by the CDN resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3930,7 +4095,11 @@ impl OriginGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OriginGroupListResult {
     #[doc = "List of CDN origin groups within an endpoint"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OriginGroup>,
     #[doc = "URL to get the next set of origin objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4067,7 +4236,11 @@ pub struct OriginGroupUpdatePropertiesParameters {
     #[serde(rename = "healthProbeSettings", default, skip_serializing_if = "Option::is_none")]
     pub health_probe_settings: Option<HealthProbeParameters>,
     #[doc = "The source of the content being delivered via CDN within given origin group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<ResourceReference>,
     #[doc = "Time in minutes to shift the traffic to the endpoint gradually when an unhealthy endpoint comes healthy or a new endpoint is added. Default is 10 mins. This property is currently not supported."]
     #[serde(
@@ -4093,7 +4266,11 @@ impl OriginGroupUpdatePropertiesParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OriginListResult {
     #[doc = "List of CDN origins within an endpoint"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Origin>,
     #[doc = "URL to get the next set of origin objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4288,10 +4465,19 @@ pub struct PostArgsMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl PostArgsMatchConditionParameters {
@@ -4394,7 +4580,11 @@ impl Profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileListResult {
     #[doc = "List of CDN profiles within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Profile>,
     #[doc = "URL to get the next set of profile objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4527,10 +4717,19 @@ pub struct QueryStringMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl QueryStringMatchConditionParameters {
@@ -4615,7 +4814,11 @@ pub struct RankingsResponse {
     pub date_time_begin: Option<time::OffsetDateTime>,
     #[serde(rename = "dateTimeEnd", default, with = "azure_core::date::rfc3339::option")]
     pub date_time_end: Option<time::OffsetDateTime>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<serde_json::Value>,
 }
 impl RankingsResponse {
@@ -4648,7 +4851,11 @@ impl RateLimitRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RateLimitRuleList {
     #[doc = "List of rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<RateLimitRule>,
 }
 impl RateLimitRuleList {
@@ -4667,10 +4874,19 @@ pub struct RemoteAddressMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "Match values to match against. The operator will apply to each value in here with OR semantics. If any of them match the variable with the given operator this match condition is considered a match."]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RemoteAddressMatchConditionParameters {
@@ -4746,10 +4962,19 @@ pub struct RequestBodyMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RequestBodyMatchConditionParameters {
@@ -4841,10 +5066,19 @@ pub struct RequestHeaderMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RequestHeaderMatchConditionParameters {
@@ -4934,7 +5168,12 @@ pub struct RequestMethodMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
 }
 impl RequestMethodMatchConditionParameters {
@@ -5004,7 +5243,12 @@ pub struct RequestSchemeMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
 }
 impl RequestSchemeMatchConditionParameters {
@@ -5044,10 +5288,19 @@ pub struct RequestUriMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RequestUriMatchConditionParameters {
@@ -5189,7 +5442,11 @@ impl ResourceUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceUsageListResult {
     #[doc = "List of resource usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceUsage>,
     #[doc = "URL to get the next set of custom domain objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5209,9 +5466,18 @@ impl ResourceUsageListResult {
 #[doc = "Resources Response"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourcesResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<serde_json::Value>,
-    #[serde(rename = "customDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_domains: Vec<serde_json::Value>,
 }
 impl ResourcesResponse {
@@ -5233,7 +5499,12 @@ pub struct ResponseBasedOriginErrorDetectionParameters {
     )]
     pub response_based_failover_threshold_percentage: Option<i64>,
     #[doc = "The list of Http status code ranges that are considered as server errors for origin and it is marked as unhealthy."]
-    #[serde(rename = "httpErrorRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpErrorRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_error_ranges: Vec<HttpErrorRangeParameters>,
 }
 impl ResponseBasedOriginErrorDetectionParameters {
@@ -5269,7 +5540,11 @@ impl Route {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RouteListResult {
     #[doc = "List of AzureFrontDoor routes within a profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Route>,
     #[doc = "URL to get the next set of route objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5318,7 +5593,12 @@ impl RouteUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RouteUpdatePropertiesParameters {
     #[doc = "Domains referenced by this endpoint."]
-    #[serde(rename = "customDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_domains: Vec<ResourceReference>,
     #[doc = "Reference to another resource."]
     #[serde(rename = "originGroup", default, skip_serializing_if = "Option::is_none")]
@@ -5327,13 +5607,28 @@ pub struct RouteUpdatePropertiesParameters {
     #[serde(rename = "originPath", default, skip_serializing_if = "Option::is_none")]
     pub origin_path: Option<String>,
     #[doc = "rule sets referenced by this endpoint."]
-    #[serde(rename = "ruleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_sets: Vec<ResourceReference>,
     #[doc = "List of supported protocols for this route."]
-    #[serde(rename = "supportedProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_protocols: Vec<AfdEndpointProtocols>,
     #[doc = "The route patterns of the rule."]
-    #[serde(rename = "patternsToMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternsToMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub patterns_to_match: Vec<String>,
     #[doc = "settings for compression."]
     #[serde(rename = "compressionSettings", default, skip_serializing_if = "Option::is_none")]
@@ -5537,7 +5832,11 @@ impl Rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RuleListResult {
     #[doc = "List of AzureFrontDoor rules within a rule set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Rule>,
     #[doc = "URL to get the next set of rule objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5588,7 +5887,11 @@ impl RuleSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RuleSetListResult {
     #[doc = "List of AzureFrontDoor rule sets within a profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RuleSet>,
     #[doc = "URL to get the next set of rule set objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5635,10 +5938,18 @@ pub struct RuleUpdatePropertiesParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub order: Option<i32>,
     #[doc = "A list of conditions that must be matched for the actions to be executed"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<DeliveryRuleCondition>,
     #[doc = "A list of actions that are executed when all the conditions of a rule are satisfied."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<DeliveryRuleAction>,
     #[doc = "If this rule is a match should the rules engine continue running the remaining rules or stop. If not present, defaults to Continue."]
     #[serde(rename = "matchProcessingBehavior", default, skip_serializing_if = "Option::is_none")]
@@ -5707,7 +6018,11 @@ impl Secret {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecretListResult {
     #[doc = "List of AzureFrontDoor secrets within a profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Secret>,
     #[doc = "URL to get the next set of Secret objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5810,7 +6125,11 @@ impl SecurityPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityPolicyListResult {
     #[doc = "List of Security policies within a profile"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SecurityPolicy>,
     #[doc = "URL to get the next set of security policy objects if there is any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5895,10 +6214,19 @@ impl SecurityPolicyProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityPolicyWebApplicationFirewallAssociation {
     #[doc = "List of domains."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domains: Vec<ResourceReference>,
     #[doc = "List of paths"]
-    #[serde(rename = "patternsToMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternsToMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub patterns_to_match: Vec<String>,
 }
 impl SecurityPolicyWebApplicationFirewallAssociation {
@@ -5915,7 +6243,11 @@ pub struct SecurityPolicyWebApplicationFirewallParameters {
     #[serde(rename = "wafPolicy", default, skip_serializing_if = "Option::is_none")]
     pub waf_policy: Option<ResourceReference>,
     #[doc = "Waf associations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub associations: Vec<SecurityPolicyWebApplicationFirewallAssociation>,
 }
 impl SecurityPolicyWebApplicationFirewallParameters {
@@ -6073,7 +6405,12 @@ impl SsoUri {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedOptimizationTypesListResult {
     #[doc = "Supported optimization types for a profile."]
-    #[serde(rename = "supportedOptimizationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOptimizationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_optimization_types: Vec<OptimizationType>,
 }
 impl SupportedOptimizationTypesListResult {
@@ -6184,10 +6521,19 @@ pub struct UrlFileExtensionMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl UrlFileExtensionMatchConditionParameters {
@@ -6276,10 +6622,19 @@ pub struct UrlFileNameMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl UrlFileNameMatchConditionParameters {
@@ -6368,10 +6723,19 @@ pub struct UrlPathMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl UrlPathMatchConditionParameters {
@@ -6665,7 +7029,12 @@ pub struct UrlSigningActionParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub algorithm: Option<url_signing_action_parameters::Algorithm>,
     #[doc = "Defines which query string parameters in the url to be considered for expires, key id etc. "]
-    #[serde(rename = "parameterNameOverride", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parameterNameOverride",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameter_name_override: Vec<UrlSigningParamIdentifier>,
 }
 impl UrlSigningActionParameters {
@@ -6908,7 +7277,11 @@ impl UsageName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsagesListResult {
     #[doc = "The list of resource usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7144,7 +7517,11 @@ pub struct WafMetricsResponse {
     pub date_time_end: Option<time::OffsetDateTime>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub granularity: Option<waf_metrics_response::Granularity>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub series: Vec<serde_json::Value>,
 }
 impl WafMetricsResponse {
@@ -7171,9 +7548,17 @@ pub struct WafRankingsResponse {
     pub date_time_begin: Option<time::OffsetDateTime>,
     #[serde(rename = "dateTimeEnd", default, with = "azure_core::date::rfc3339::option")]
     pub date_time_end: Option<time::OffsetDateTime>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<serde_json::Value>,
 }
 impl WafRankingsResponse {
diff --git a/services/mgmt/cdn/src/package_2021_06/models.rs b/services/mgmt/cdn/src/package_2021_06/models.rs
index 62ce4d51e8..c4245c16c0 100644
--- a/services/mgmt/cdn/src/package_2021_06/models.rs
+++ b/services/mgmt/cdn/src/package_2021_06/models.rs
@@ -95,7 +95,11 @@ pub mod afd_domain_https_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AfdDomainListResult {
     #[doc = "List of AzureFrontDoor domains within a profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AfdDomain>,
     #[doc = "URL to get the next set of domain objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -250,7 +254,11 @@ impl AfdEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AfdEndpointListResult {
     #[doc = "List of AzureFrontDoor endpoints within a profile"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AfdEndpoint>,
     #[doc = "URL to get the next set of endpoint objects if there is any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -425,7 +433,11 @@ impl AfdOriginGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AfdOriginGroupListResult {
     #[doc = "List of CDN origin groups within an endpoint"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AfdOriginGroup>,
     #[doc = "URL to get the next set of origin objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -539,7 +551,11 @@ pub mod afd_origin_group_update_properties_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AfdOriginListResult {
     #[doc = "List of CDN origins within an endpoint"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AfdOrigin>,
     #[doc = "URL to get the next set of origin objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -847,7 +863,11 @@ pub struct AfdPurgeParameters {
     #[serde(rename = "contentPaths")]
     pub content_paths: Vec<String>,
     #[doc = "List of domains."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domains: Vec<String>,
 }
 impl AfdPurgeParameters {
@@ -1441,7 +1461,11 @@ impl CdnWebApplicationFirewallPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CdnWebApplicationFirewallPolicyList {
     #[doc = "List of Azure CDN WebApplicationFirewallPolicies within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CdnWebApplicationFirewallPolicy>,
     #[doc = "URL to get the next set of WebApplicationFirewallPolicy objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1486,7 +1510,12 @@ pub struct CdnWebApplicationFirewallPolicyProperties {
     #[serde(rename = "managedRules", default, skip_serializing_if = "Option::is_none")]
     pub managed_rules: Option<ManagedRuleSetList>,
     #[doc = "Describes Azure CDN endpoints associated with this Web Application Firewall policy."]
-    #[serde(rename = "endpointLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_links: Vec<CdnEndpoint>,
     #[doc = "Provisioning state of the WebApplicationFirewallPolicy."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1700,10 +1729,19 @@ pub struct ClientPortMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl ClientPortMatchConditionParameters {
@@ -1784,7 +1822,12 @@ pub mod client_port_match_condition_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CompressionSettings {
     #[doc = "List of content types on which compression applies. The value should be a valid MIME type."]
-    #[serde(rename = "contentTypesToCompress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentTypesToCompress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_types_to_compress: Vec<String>,
     #[doc = "Indicates whether content compression is enabled on AzureFrontDoor. Default value is false. If compression is enabled, content will be served as compressed if user requests for a compressed version. Content won't be compressed on AzureFrontDoor when requested content is smaller than 1 byte or larger than 1 MB."]
     #[serde(rename = "isCompressionEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -1798,9 +1841,18 @@ impl CompressionSettings {
 #[doc = "Continents Response"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContinentsResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub continents: Vec<serde_json::Value>,
-    #[serde(rename = "countryOrRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "countryOrRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub country_or_regions: Vec<serde_json::Value>,
 }
 impl ContinentsResponse {
@@ -1822,10 +1874,19 @@ pub struct CookiesMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl CookiesMatchConditionParameters {
@@ -2030,7 +2091,11 @@ pub mod custom_domain_https_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomDomainListResult {
     #[doc = "List of CDN CustomDomains within an endpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomDomain>,
     #[doc = "URL to get the next set of custom domain objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2383,7 +2448,11 @@ pub mod custom_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRuleList {
     #[doc = "List of rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<CustomRule>,
 }
 impl CustomRuleList {
@@ -2409,7 +2478,12 @@ pub struct CustomerCertificate {
     #[serde(rename = "useLatestVersion", default, skip_serializing_if = "Option::is_none")]
     pub use_latest_version: Option<bool>,
     #[doc = "The list of SANs."]
-    #[serde(rename = "subjectAlternativeNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subjectAlternativeNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subject_alternative_names: Vec<String>,
     #[doc = "Certificate thumbprint."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2444,7 +2518,12 @@ pub struct CustomerCertificateParameters {
     #[serde(rename = "certificateAuthority", default, skip_serializing_if = "Option::is_none")]
     pub certificate_authority: Option<String>,
     #[doc = "The list of SANs."]
-    #[serde(rename = "subjectAlternativeNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subjectAlternativeNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subject_alternative_names: Vec<String>,
     #[doc = "Certificate thumbprint."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2625,7 +2704,11 @@ pub struct DeliveryRule {
     #[doc = "The order in which the rules are applied for the endpoint. Possible values {0,1,2,3,………}. A rule with a lesser order will be applied before a rule with a greater order. Rule with order 0 is a special rule. It does not require any condition and actions listed in it will always be applied."]
     pub order: i32,
     #[doc = "A list of conditions that must be matched for the actions to be executed"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<DeliveryRuleCondition>,
     #[doc = "A list of actions that are executed when all the conditions of a rule are satisfied."]
     pub actions: Vec<DeliveryRuleAction>,
@@ -3237,7 +3320,11 @@ impl EdgeNodeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EdgenodeResult {
     #[doc = "Edge node of CDN service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EdgeNode>,
     #[doc = "URL to get the next set of edgenode list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3275,7 +3362,11 @@ impl Endpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EndpointListResult {
     #[doc = "List of CDN endpoints within a profile"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Endpoint>,
     #[doc = "URL to get the next set of endpoint objects if there is any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3303,10 +3394,20 @@ pub struct EndpointProperties {
     #[doc = "The source of the content being delivered via CDN."]
     pub origins: Vec<DeepCreatedOrigin>,
     #[doc = "The origin groups comprising of origins that are used for load balancing the traffic based on availability."]
-    #[serde(rename = "originGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "originGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origin_groups: Vec<DeepCreatedOriginGroup>,
     #[doc = "The custom domains under the endpoint."]
-    #[serde(rename = "customDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_domains: Vec<DeepCreatedCustomDomain>,
     #[doc = "Resource status of the endpoint."]
     #[serde(rename = "resourceState", default, skip_serializing_if = "Option::is_none")]
@@ -3426,7 +3527,12 @@ pub struct EndpointPropertiesUpdateParameters {
     #[serde(rename = "originPath", default, skip_serializing_if = "Option::is_none")]
     pub origin_path: Option<String>,
     #[doc = "List of content types on which compression applies. The value should be a valid MIME type."]
-    #[serde(rename = "contentTypesToCompress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentTypesToCompress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_types_to_compress: Vec<String>,
     #[doc = "The host header value sent to the origin with each request. This property at Endpoint is only allowed when endpoint uses single origin and can be overridden by the same property specified at origin.If you leave this blank, the request hostname determines this value. Azure CDN origins, such as Web Apps, Blob Storage, and Cloud Services require this host header value to match the origin hostname by default."]
     #[serde(rename = "originHostHeader", default, skip_serializing_if = "Option::is_none")]
@@ -3450,13 +3556,23 @@ pub struct EndpointPropertiesUpdateParameters {
     #[serde(rename = "probePath", default, skip_serializing_if = "Option::is_none")]
     pub probe_path: Option<String>,
     #[doc = "List of rules defining the user's geo access within a CDN endpoint. Each geo filter defines an access rule to a specified path or content, e.g. block APAC for path /pictures/"]
-    #[serde(rename = "geoFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "geoFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub geo_filters: Vec<GeoFilter>,
     #[doc = "Reference to another resource."]
     #[serde(rename = "defaultOriginGroup", default, skip_serializing_if = "Option::is_none")]
     pub default_origin_group: Option<ResourceReference>,
     #[doc = "List of keys used to validate the signed URL hashes."]
-    #[serde(rename = "urlSigningKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "urlSigningKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub url_signing_keys: Vec<UrlSigningKey>,
     #[doc = "A policy that specifies the delivery rules to be used for an endpoint."]
     #[serde(rename = "deliveryPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -3542,10 +3658,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -3727,10 +3852,19 @@ pub struct HostNameMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl HostNameMatchConditionParameters {
@@ -3833,10 +3967,19 @@ pub struct HttpVersionMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl HttpVersionMatchConditionParameters {
@@ -3947,10 +4090,20 @@ pub struct IpAddressGroup {
     #[serde(rename = "deliveryRegion", default, skip_serializing_if = "Option::is_none")]
     pub delivery_region: Option<String>,
     #[doc = "The list of ip v4 addresses."]
-    #[serde(rename = "ipv4Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv4Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv4_addresses: Vec<CidrIpAddress>,
     #[doc = "The list of ip v6 addresses."]
-    #[serde(rename = "ipv6Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv6Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv6_addresses: Vec<CidrIpAddress>,
 }
 impl IpAddressGroup {
@@ -3969,10 +4122,19 @@ pub struct IsDeviceMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl IsDeviceMatchConditionParameters {
@@ -4312,7 +4474,11 @@ pub struct ManagedRuleGroupDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of rules within the managed rule group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleDefinition>,
 }
 impl ManagedRuleGroupDefinition {
@@ -4327,7 +4493,11 @@ pub struct ManagedRuleGroupOverride {
     #[serde(rename = "ruleGroupName")]
     pub rule_group_name: String,
     #[doc = "List of rules that will be enabled. If none specified, all rules in the group will be disabled."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleOverride>,
 }
 impl ManagedRuleGroupOverride {
@@ -4413,7 +4583,12 @@ pub struct ManagedRuleSet {
     #[serde(rename = "anomalyScore", default, skip_serializing_if = "Option::is_none")]
     pub anomaly_score: Option<i32>,
     #[doc = "Defines the rule overrides to apply to the rule set."]
-    #[serde(rename = "ruleGroupOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroupOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_group_overrides: Vec<ManagedRuleGroupOverride>,
 }
 impl ManagedRuleSet {
@@ -4447,7 +4622,11 @@ impl ManagedRuleSetDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetDefinitionList {
     #[doc = "List of managed rule set definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedRuleSetDefinition>,
     #[doc = "URL to retrieve next set of managed rule set definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4477,7 +4656,12 @@ pub struct ManagedRuleSetDefinitionProperties {
     #[serde(rename = "ruleSetVersion", default, skip_serializing_if = "Option::is_none")]
     pub rule_set_version: Option<String>,
     #[doc = "Rule groups of the managed rule set."]
-    #[serde(rename = "ruleGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_groups: Vec<ManagedRuleGroupDefinition>,
 }
 impl ManagedRuleSetDefinitionProperties {
@@ -4489,7 +4673,12 @@ impl ManagedRuleSetDefinitionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetList {
     #[doc = "List of rule sets."]
-    #[serde(rename = "managedRuleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedRuleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_rule_sets: Vec<ManagedRuleSet>,
 }
 impl ManagedRuleSetList {
@@ -4515,7 +4704,11 @@ pub struct MatchCondition {
     #[serde(rename = "matchValue")]
     pub match_value: Vec<String>,
     #[doc = "List of transforms."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<TransformType>,
 }
 impl MatchCondition {
@@ -4674,13 +4867,26 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Retention policies of a resource metric."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<MetricAvailability>,
     #[doc = "The supported time grain types for the metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "The dimensions of metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<DimensionProperties>,
     #[doc = "Property to specify whether to fill gap with zero."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -4706,7 +4912,11 @@ pub struct MetricsResponse {
     pub date_time_end: Option<time::OffsetDateTime>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub granularity: Option<metrics_response::Granularity>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub series: Vec<serde_json::Value>,
 }
 impl MetricsResponse {
@@ -4790,7 +5000,11 @@ impl OperationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "List of CDN operations supported by the CDN resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4882,7 +5096,11 @@ impl OriginGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OriginGroupListResult {
     #[doc = "List of CDN origin groups within an endpoint"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OriginGroup>,
     #[doc = "URL to get the next set of origin objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5118,7 +5336,11 @@ pub struct OriginGroupUpdatePropertiesParameters {
     #[serde(rename = "healthProbeSettings", default, skip_serializing_if = "Option::is_none")]
     pub health_probe_settings: Option<HealthProbeParameters>,
     #[doc = "The source of the content being delivered via CDN within given origin group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<ResourceReference>,
     #[doc = "Time in minutes to shift the traffic to the endpoint gradually when an unhealthy endpoint comes healthy or a new endpoint is added. Default is 10 mins. This property is currently not supported."]
     #[serde(
@@ -5144,7 +5366,11 @@ impl OriginGroupUpdatePropertiesParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OriginListResult {
     #[doc = "List of CDN origins within an endpoint"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Origin>,
     #[doc = "URL to get the next set of origin objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5339,10 +5565,19 @@ pub struct PostArgsMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl PostArgsMatchConditionParameters {
@@ -5491,7 +5726,11 @@ impl Profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileListResult {
     #[doc = "List of CDN profiles within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Profile>,
     #[doc = "URL to get the next set of profile objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5685,10 +5924,19 @@ pub struct QueryStringMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl QueryStringMatchConditionParameters {
@@ -5772,7 +6020,11 @@ pub struct RankingsResponse {
     pub date_time_begin: Option<time::OffsetDateTime>,
     #[serde(rename = "dateTimeEnd", default, with = "azure_core::date::rfc3339::option")]
     pub date_time_end: Option<time::OffsetDateTime>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<serde_json::Value>,
 }
 impl RankingsResponse {
@@ -5805,7 +6057,11 @@ impl RateLimitRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RateLimitRuleList {
     #[doc = "List of rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<RateLimitRule>,
 }
 impl RateLimitRuleList {
@@ -5824,10 +6080,19 @@ pub struct RemoteAddressMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "Match values to match against. The operator will apply to each value in here with OR semantics. If any of them match the variable with the given operator this match condition is considered a match."]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RemoteAddressMatchConditionParameters {
@@ -5902,10 +6167,19 @@ pub struct RequestBodyMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RequestBodyMatchConditionParameters {
@@ -5996,10 +6270,19 @@ pub struct RequestHeaderMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RequestHeaderMatchConditionParameters {
@@ -6088,10 +6371,19 @@ pub struct RequestMethodMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
 }
 impl RequestMethodMatchConditionParameters {
@@ -6161,10 +6453,19 @@ pub struct RequestSchemeMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
 }
 impl RequestSchemeMatchConditionParameters {
@@ -6204,10 +6505,19 @@ pub struct RequestUriMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RequestUriMatchConditionParameters {
@@ -6424,7 +6734,11 @@ pub mod resource_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceUsageListResult {
     #[doc = "List of resource usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceUsage>,
     #[doc = "URL to get the next set of custom domain objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6444,9 +6758,18 @@ impl ResourceUsageListResult {
 #[doc = "Resources Response"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourcesResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<serde_json::Value>,
-    #[serde(rename = "customDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_domains: Vec<serde_json::Value>,
 }
 impl ResourcesResponse {
@@ -6468,7 +6791,12 @@ pub struct ResponseBasedOriginErrorDetectionParameters {
     )]
     pub response_based_failover_threshold_percentage: Option<i32>,
     #[doc = "The list of Http status code ranges that are considered as server errors for origin and it is marked as unhealthy."]
-    #[serde(rename = "httpErrorRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpErrorRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_error_ranges: Vec<HttpErrorRangeParameters>,
 }
 impl ResponseBasedOriginErrorDetectionParameters {
@@ -6532,7 +6860,11 @@ pub mod route_configuration_override_action_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RouteListResult {
     #[doc = "List of AzureFrontDoor routes within a profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Route>,
     #[doc = "URL to get the next set of route objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6584,7 +6916,12 @@ pub struct RouteUpdatePropertiesParameters {
     #[serde(rename = "endpointName", default, skip_serializing_if = "Option::is_none")]
     pub endpoint_name: Option<String>,
     #[doc = "Domains referenced by this endpoint."]
-    #[serde(rename = "customDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_domains: Vec<ActivatedResourceReference>,
     #[doc = "Reference to another resource."]
     #[serde(rename = "originGroup", default, skip_serializing_if = "Option::is_none")]
@@ -6593,13 +6930,28 @@ pub struct RouteUpdatePropertiesParameters {
     #[serde(rename = "originPath", default, skip_serializing_if = "Option::is_none")]
     pub origin_path: Option<String>,
     #[doc = "rule sets referenced by this endpoint."]
-    #[serde(rename = "ruleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_sets: Vec<ResourceReference>,
     #[doc = "List of supported protocols for this route."]
-    #[serde(rename = "supportedProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_protocols: Vec<AfdEndpointProtocols>,
     #[doc = "The route patterns of the rule."]
-    #[serde(rename = "patternsToMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternsToMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub patterns_to_match: Vec<String>,
     #[doc = "Caching settings for a caching-type route. To disable caching, do not provide a cacheConfiguration object."]
     #[serde(rename = "cacheConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -6793,7 +7145,11 @@ impl Rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RuleListResult {
     #[doc = "List of AzureFrontDoor rules within a rule set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Rule>,
     #[doc = "URL to get the next set of rule objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6844,7 +7200,11 @@ impl RuleSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RuleSetListResult {
     #[doc = "List of AzureFrontDoor rule sets within a profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RuleSet>,
     #[doc = "URL to get the next set of rule set objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6897,10 +7257,18 @@ pub struct RuleUpdatePropertiesParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub order: Option<i32>,
     #[doc = "A list of conditions that must be matched for the actions to be executed"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<DeliveryRuleCondition>,
     #[doc = "A list of actions that are executed when all the conditions of a rule are satisfied."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<DeliveryRuleAction>,
     #[doc = "If this rule is a match should the rules engine continue running the remaining rules or stop. If not present, defaults to Continue."]
     #[serde(rename = "matchProcessingBehavior", default, skip_serializing_if = "Option::is_none")]
@@ -6969,7 +7337,11 @@ impl Secret {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecretListResult {
     #[doc = "List of AzureFrontDoor secrets within a profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Secret>,
     #[doc = "URL to get the next set of Secret objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7076,7 +7448,11 @@ impl SecurityPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityPolicyListResult {
     #[doc = "List of Security policies within a profile"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SecurityPolicy>,
     #[doc = "URL to get the next set of security policy objects if there is any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7188,10 +7564,19 @@ impl SecurityPolicyUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityPolicyWebApplicationFirewallAssociation {
     #[doc = "List of domains."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domains: Vec<ActivatedResourceReference>,
     #[doc = "List of paths"]
-    #[serde(rename = "patternsToMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternsToMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub patterns_to_match: Vec<String>,
 }
 impl SecurityPolicyWebApplicationFirewallAssociation {
@@ -7208,7 +7593,11 @@ pub struct SecurityPolicyWebApplicationFirewallParameters {
     #[serde(rename = "wafPolicy", default, skip_serializing_if = "Option::is_none")]
     pub waf_policy: Option<ResourceReference>,
     #[doc = "Waf associations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub associations: Vec<SecurityPolicyWebApplicationFirewallAssociation>,
 }
 impl SecurityPolicyWebApplicationFirewallParameters {
@@ -7231,10 +7620,19 @@ pub struct ServerPortMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl ServerPortMatchConditionParameters {
@@ -7315,10 +7713,20 @@ pub mod server_port_match_condition_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Log specifications of operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -7464,10 +7872,19 @@ pub struct SocketAddrMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl SocketAddrMatchConditionParameters {
@@ -7582,10 +7999,19 @@ pub struct SslProtocolMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<SslProtocol>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl SslProtocolMatchConditionParameters {
@@ -7660,7 +8086,12 @@ impl SsoUri {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedOptimizationTypesListResult {
     #[doc = "Supported optimization types for a profile."]
-    #[serde(rename = "supportedOptimizationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOptimizationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_optimization_types: Vec<OptimizationType>,
 }
 impl SupportedOptimizationTypesListResult {
@@ -7771,10 +8202,19 @@ pub struct UrlFileExtensionMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl UrlFileExtensionMatchConditionParameters {
@@ -7862,10 +8302,19 @@ pub struct UrlFileNameMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl UrlFileNameMatchConditionParameters {
@@ -7953,10 +8402,19 @@ pub struct UrlPathMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl UrlPathMatchConditionParameters {
@@ -8244,7 +8702,12 @@ pub struct UrlSigningActionParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub algorithm: Option<url_signing_action_parameters::Algorithm>,
     #[doc = "Defines which query string parameters in the url to be considered for expires, key id etc. "]
-    #[serde(rename = "parameterNameOverride", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parameterNameOverride",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameter_name_override: Vec<UrlSigningParamIdentifier>,
 }
 impl UrlSigningActionParameters {
@@ -8486,7 +8949,11 @@ impl UsageName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsagesListResult {
     #[doc = "The list of resource usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8684,7 +9151,11 @@ pub struct WafMetricsResponse {
     pub date_time_end: Option<time::OffsetDateTime>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub granularity: Option<waf_metrics_response::Granularity>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub series: Vec<serde_json::Value>,
 }
 impl WafMetricsResponse {
@@ -8711,9 +9182,17 @@ pub struct WafRankingsResponse {
     pub date_time_begin: Option<time::OffsetDateTime>,
     #[serde(rename = "dateTimeEnd", default, with = "azure_core::date::rfc3339::option")]
     pub date_time_end: Option<time::OffsetDateTime>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<serde_json::Value>,
 }
 impl WafRankingsResponse {
diff --git a/services/mgmt/cdn/src/package_preview_2022_05/models.rs b/services/mgmt/cdn/src/package_preview_2022_05/models.rs
index 7e93b3f749..b325caac73 100644
--- a/services/mgmt/cdn/src/package_preview_2022_05/models.rs
+++ b/services/mgmt/cdn/src/package_preview_2022_05/models.rs
@@ -95,7 +95,11 @@ pub mod afd_domain_https_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AfdDomainListResult {
     #[doc = "List of AzureFrontDoor domains within a profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AfdDomain>,
     #[doc = "URL to get the next set of domain objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -254,7 +258,11 @@ impl AfdEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AfdEndpointListResult {
     #[doc = "List of AzureFrontDoor endpoints within a profile"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AfdEndpoint>,
     #[doc = "URL to get the next set of endpoint objects if there is any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -429,7 +437,11 @@ impl AfdOriginGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AfdOriginGroupListResult {
     #[doc = "List of CDN origin groups within an endpoint"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AfdOriginGroup>,
     #[doc = "URL to get the next set of origin objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -543,7 +555,11 @@ pub mod afd_origin_group_update_properties_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AfdOriginListResult {
     #[doc = "List of CDN origins within an endpoint"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AfdOrigin>,
     #[doc = "URL to get the next set of origin objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -851,7 +867,11 @@ pub struct AfdPurgeParameters {
     #[serde(rename = "contentPaths")]
     pub content_paths: Vec<String>,
     #[doc = "List of domains."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domains: Vec<String>,
 }
 impl AfdPurgeParameters {
@@ -1517,7 +1537,11 @@ impl CdnWebApplicationFirewallPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CdnWebApplicationFirewallPolicyList {
     #[doc = "List of Azure CDN WebApplicationFirewallPolicies within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CdnWebApplicationFirewallPolicy>,
     #[doc = "URL to get the next set of WebApplicationFirewallPolicy objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1562,7 +1586,12 @@ pub struct CdnWebApplicationFirewallPolicyProperties {
     #[serde(rename = "managedRules", default, skip_serializing_if = "Option::is_none")]
     pub managed_rules: Option<ManagedRuleSetList>,
     #[doc = "Describes Azure CDN endpoints associated with this Web Application Firewall policy."]
-    #[serde(rename = "endpointLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_links: Vec<CdnEndpoint>,
     #[doc = "Key-Value pair representing additional properties for Web Application Firewall policy."]
     #[serde(rename = "extendedProperties", default, skip_serializing_if = "Option::is_none")]
@@ -1779,10 +1808,19 @@ pub struct ClientPortMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl ClientPortMatchConditionParameters {
@@ -1863,7 +1901,12 @@ pub mod client_port_match_condition_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CompressionSettings {
     #[doc = "List of content types on which compression applies. The value should be a valid MIME type."]
-    #[serde(rename = "contentTypesToCompress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentTypesToCompress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_types_to_compress: Vec<String>,
     #[doc = "Indicates whether content compression is enabled on AzureFrontDoor. Default value is false. If compression is enabled, content will be served as compressed if user requests for a compressed version. Content won't be compressed on AzureFrontDoor when requested content is smaller than 1 byte or larger than 1 MB."]
     #[serde(rename = "isCompressionEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -1877,9 +1920,18 @@ impl CompressionSettings {
 #[doc = "Continents Response"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContinentsResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub continents: Vec<serde_json::Value>,
-    #[serde(rename = "countryOrRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "countryOrRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub country_or_regions: Vec<serde_json::Value>,
 }
 impl ContinentsResponse {
@@ -1901,10 +1953,19 @@ pub struct CookiesMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl CookiesMatchConditionParameters {
@@ -2109,7 +2170,11 @@ pub mod custom_domain_https_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomDomainListResult {
     #[doc = "List of CDN CustomDomains within an endpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomDomain>,
     #[doc = "URL to get the next set of custom domain objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2462,7 +2527,11 @@ pub mod custom_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRuleList {
     #[doc = "List of rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<CustomRule>,
 }
 impl CustomRuleList {
@@ -2488,7 +2557,12 @@ pub struct CustomerCertificate {
     #[serde(rename = "useLatestVersion", default, skip_serializing_if = "Option::is_none")]
     pub use_latest_version: Option<bool>,
     #[doc = "The list of SANs."]
-    #[serde(rename = "subjectAlternativeNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subjectAlternativeNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subject_alternative_names: Vec<String>,
     #[doc = "Certificate thumbprint."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2523,7 +2597,12 @@ pub struct CustomerCertificateParameters {
     #[serde(rename = "certificateAuthority", default, skip_serializing_if = "Option::is_none")]
     pub certificate_authority: Option<String>,
     #[doc = "The list of SANs."]
-    #[serde(rename = "subjectAlternativeNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subjectAlternativeNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subject_alternative_names: Vec<String>,
     #[doc = "Certificate thumbprint."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2704,7 +2783,11 @@ pub struct DeliveryRule {
     #[doc = "The order in which the rules are applied for the endpoint. Possible values {0,1,2,3,………}. A rule with a lesser order will be applied before a rule with a greater order. Rule with order 0 is a special rule. It does not require any condition and actions listed in it will always be applied."]
     pub order: i32,
     #[doc = "A list of conditions that must be matched for the actions to be executed"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<DeliveryRuleCondition>,
     #[doc = "A list of actions that are executed when all the conditions of a rule are satisfied."]
     pub actions: Vec<DeliveryRuleAction>,
@@ -3316,7 +3399,11 @@ impl EdgeNodeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EdgenodeResult {
     #[doc = "Edge node of CDN service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EdgeNode>,
     #[doc = "URL to get the next set of edgenode list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3354,7 +3441,11 @@ impl Endpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EndpointListResult {
     #[doc = "List of CDN endpoints within a profile"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Endpoint>,
     #[doc = "URL to get the next set of endpoint objects if there is any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3382,10 +3473,20 @@ pub struct EndpointProperties {
     #[doc = "The source of the content being delivered via CDN."]
     pub origins: Vec<DeepCreatedOrigin>,
     #[doc = "The origin groups comprising of origins that are used for load balancing the traffic based on availability."]
-    #[serde(rename = "originGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "originGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origin_groups: Vec<DeepCreatedOriginGroup>,
     #[doc = "The custom domains under the endpoint."]
-    #[serde(rename = "customDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_domains: Vec<DeepCreatedCustomDomain>,
     #[doc = "Resource status of the endpoint."]
     #[serde(rename = "resourceState", default, skip_serializing_if = "Option::is_none")]
@@ -3505,7 +3606,12 @@ pub struct EndpointPropertiesUpdateParameters {
     #[serde(rename = "originPath", default, skip_serializing_if = "Option::is_none")]
     pub origin_path: Option<String>,
     #[doc = "List of content types on which compression applies. The value should be a valid MIME type."]
-    #[serde(rename = "contentTypesToCompress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentTypesToCompress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_types_to_compress: Vec<String>,
     #[doc = "The host header value sent to the origin with each request. This property at Endpoint is only allowed when endpoint uses single origin and can be overridden by the same property specified at origin.If you leave this blank, the request hostname determines this value. Azure CDN origins, such as Web Apps, Blob Storage, and Cloud Services require this host header value to match the origin hostname by default."]
     #[serde(rename = "originHostHeader", default, skip_serializing_if = "Option::is_none")]
@@ -3529,13 +3635,23 @@ pub struct EndpointPropertiesUpdateParameters {
     #[serde(rename = "probePath", default, skip_serializing_if = "Option::is_none")]
     pub probe_path: Option<String>,
     #[doc = "List of rules defining the user's geo access within a CDN endpoint. Each geo filter defines an access rule to a specified path or content, e.g. block APAC for path /pictures/"]
-    #[serde(rename = "geoFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "geoFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub geo_filters: Vec<GeoFilter>,
     #[doc = "Reference to another resource."]
     #[serde(rename = "defaultOriginGroup", default, skip_serializing_if = "Option::is_none")]
     pub default_origin_group: Option<ResourceReference>,
     #[doc = "List of keys used to validate the signed URL hashes."]
-    #[serde(rename = "urlSigningKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "urlSigningKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub url_signing_keys: Vec<UrlSigningKey>,
     #[doc = "A policy that specifies the delivery rules to be used for an endpoint."]
     #[serde(rename = "deliveryPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -3621,10 +3737,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -3806,10 +3931,19 @@ pub struct HostNameMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl HostNameMatchConditionParameters {
@@ -3912,10 +4046,19 @@ pub struct HttpVersionMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl HttpVersionMatchConditionParameters {
@@ -4026,10 +4169,20 @@ pub struct IpAddressGroup {
     #[serde(rename = "deliveryRegion", default, skip_serializing_if = "Option::is_none")]
     pub delivery_region: Option<String>,
     #[doc = "The list of ip v4 addresses."]
-    #[serde(rename = "ipv4Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv4Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv4_addresses: Vec<CidrIpAddress>,
     #[doc = "The list of ip v6 addresses."]
-    #[serde(rename = "ipv6Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv6Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv6_addresses: Vec<CidrIpAddress>,
 }
 impl IpAddressGroup {
@@ -4048,10 +4201,19 @@ pub struct IsDeviceMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl IsDeviceMatchConditionParameters {
@@ -4391,7 +4553,11 @@ pub struct ManagedRuleGroupDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of rules within the managed rule group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleDefinition>,
 }
 impl ManagedRuleGroupDefinition {
@@ -4406,7 +4572,11 @@ pub struct ManagedRuleGroupOverride {
     #[serde(rename = "ruleGroupName")]
     pub rule_group_name: String,
     #[doc = "List of rules that will be enabled. If none specified, all rules in the group will be disabled."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleOverride>,
 }
 impl ManagedRuleGroupOverride {
@@ -4492,7 +4662,12 @@ pub struct ManagedRuleSet {
     #[serde(rename = "anomalyScore", default, skip_serializing_if = "Option::is_none")]
     pub anomaly_score: Option<i32>,
     #[doc = "Defines the rule overrides to apply to the rule set."]
-    #[serde(rename = "ruleGroupOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroupOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_group_overrides: Vec<ManagedRuleGroupOverride>,
 }
 impl ManagedRuleSet {
@@ -4526,7 +4701,11 @@ impl ManagedRuleSetDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetDefinitionList {
     #[doc = "List of managed rule set definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedRuleSetDefinition>,
     #[doc = "URL to retrieve next set of managed rule set definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4556,7 +4735,12 @@ pub struct ManagedRuleSetDefinitionProperties {
     #[serde(rename = "ruleSetVersion", default, skip_serializing_if = "Option::is_none")]
     pub rule_set_version: Option<String>,
     #[doc = "Rule groups of the managed rule set."]
-    #[serde(rename = "ruleGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_groups: Vec<ManagedRuleGroupDefinition>,
 }
 impl ManagedRuleSetDefinitionProperties {
@@ -4568,7 +4752,12 @@ impl ManagedRuleSetDefinitionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetList {
     #[doc = "List of rule sets."]
-    #[serde(rename = "managedRuleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedRuleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_rule_sets: Vec<ManagedRuleSet>,
 }
 impl ManagedRuleSetList {
@@ -4594,7 +4783,11 @@ pub struct MatchCondition {
     #[serde(rename = "matchValue")]
     pub match_value: Vec<String>,
     #[doc = "List of transforms."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<TransformType>,
 }
 impl MatchCondition {
@@ -4753,13 +4946,26 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Retention policies of a resource metric."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<MetricAvailability>,
     #[doc = "The supported time grain types for the metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "The dimensions of metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<DimensionProperties>,
     #[doc = "Property to specify whether to fill gap with zero."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -4785,7 +4991,11 @@ pub struct MetricsResponse {
     pub date_time_end: Option<time::OffsetDateTime>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub granularity: Option<metrics_response::Granularity>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub series: Vec<serde_json::Value>,
 }
 impl MetricsResponse {
@@ -4844,7 +5054,11 @@ impl MigrationErrorType {
 #[doc = "Error response indicates CDN service is not able to process the incoming request. The reason is provided in the error message."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationErrorsListResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<MigrationErrorType>,
 }
 impl MigrationErrorsListResponse {
@@ -4865,7 +5079,12 @@ pub struct MigrationParameters {
     #[serde(rename = "profileName", default, skip_serializing_if = "Option::is_none")]
     pub profile_name: Option<String>,
     #[doc = "Waf mapping for the migrated profile"]
-    #[serde(rename = "migrationWebApplicationFirewallMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "migrationWebApplicationFirewallMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub migration_web_application_firewall_mappings: Vec<MigrationWebApplicationFirewallMapping>,
 }
 impl MigrationParameters {
@@ -4952,7 +5171,11 @@ impl OperationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "List of CDN operations supported by the CDN resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5044,7 +5267,11 @@ impl OriginGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OriginGroupListResult {
     #[doc = "List of CDN origin groups within an endpoint"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OriginGroup>,
     #[doc = "URL to get the next set of origin objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5280,7 +5507,11 @@ pub struct OriginGroupUpdatePropertiesParameters {
     #[serde(rename = "healthProbeSettings", default, skip_serializing_if = "Option::is_none")]
     pub health_probe_settings: Option<HealthProbeParameters>,
     #[doc = "The source of the content being delivered via CDN within given origin group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<ResourceReference>,
     #[doc = "Time in minutes to shift the traffic to the endpoint gradually when an unhealthy endpoint comes healthy or a new endpoint is added. Default is 10 mins. This property is currently not supported."]
     #[serde(
@@ -5306,7 +5537,11 @@ impl OriginGroupUpdatePropertiesParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OriginListResult {
     #[doc = "List of CDN origins within an endpoint"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Origin>,
     #[doc = "URL to get the next set of origin objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5501,10 +5736,19 @@ pub struct PostArgsMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl PostArgsMatchConditionParameters {
@@ -5653,7 +5897,11 @@ impl Profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileListResult {
     #[doc = "List of CDN profiles within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Profile>,
     #[doc = "URL to get the next set of profile objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5860,10 +6108,19 @@ pub struct QueryStringMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl QueryStringMatchConditionParameters {
@@ -5947,7 +6204,11 @@ pub struct RankingsResponse {
     pub date_time_begin: Option<time::OffsetDateTime>,
     #[serde(rename = "dateTimeEnd", default, with = "azure_core::date::rfc3339::option")]
     pub date_time_end: Option<time::OffsetDateTime>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<serde_json::Value>,
 }
 impl RankingsResponse {
@@ -5980,7 +6241,11 @@ impl RateLimitRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RateLimitRuleList {
     #[doc = "List of rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<RateLimitRule>,
 }
 impl RateLimitRuleList {
@@ -5999,10 +6264,19 @@ pub struct RemoteAddressMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "Match values to match against. The operator will apply to each value in here with OR semantics. If any of them match the variable with the given operator this match condition is considered a match."]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RemoteAddressMatchConditionParameters {
@@ -6077,10 +6351,19 @@ pub struct RequestBodyMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RequestBodyMatchConditionParameters {
@@ -6171,10 +6454,19 @@ pub struct RequestHeaderMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RequestHeaderMatchConditionParameters {
@@ -6263,10 +6555,19 @@ pub struct RequestMethodMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
 }
 impl RequestMethodMatchConditionParameters {
@@ -6336,10 +6637,19 @@ pub struct RequestSchemeMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
 }
 impl RequestSchemeMatchConditionParameters {
@@ -6379,10 +6689,19 @@ pub struct RequestUriMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RequestUriMatchConditionParameters {
@@ -6599,7 +6918,11 @@ pub mod resource_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceUsageListResult {
     #[doc = "List of resource usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceUsage>,
     #[doc = "URL to get the next set of custom domain objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6619,9 +6942,18 @@ impl ResourceUsageListResult {
 #[doc = "Resources Response"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourcesResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<serde_json::Value>,
-    #[serde(rename = "customDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_domains: Vec<serde_json::Value>,
 }
 impl ResourcesResponse {
@@ -6643,7 +6975,12 @@ pub struct ResponseBasedOriginErrorDetectionParameters {
     )]
     pub response_based_failover_threshold_percentage: Option<i32>,
     #[doc = "The list of Http status code ranges that are considered as server errors for origin and it is marked as unhealthy."]
-    #[serde(rename = "httpErrorRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpErrorRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_error_ranges: Vec<HttpErrorRangeParameters>,
 }
 impl ResponseBasedOriginErrorDetectionParameters {
@@ -6707,7 +7044,11 @@ pub mod route_configuration_override_action_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RouteListResult {
     #[doc = "List of AzureFrontDoor routes within a profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Route>,
     #[doc = "URL to get the next set of route objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6759,7 +7100,12 @@ pub struct RouteUpdatePropertiesParameters {
     #[serde(rename = "endpointName", default, skip_serializing_if = "Option::is_none")]
     pub endpoint_name: Option<String>,
     #[doc = "Domains referenced by this endpoint."]
-    #[serde(rename = "customDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_domains: Vec<ActivatedResourceReference>,
     #[doc = "Reference to another resource."]
     #[serde(rename = "originGroup", default, skip_serializing_if = "Option::is_none")]
@@ -6768,13 +7114,28 @@ pub struct RouteUpdatePropertiesParameters {
     #[serde(rename = "originPath", default, skip_serializing_if = "Option::is_none")]
     pub origin_path: Option<String>,
     #[doc = "rule sets referenced by this endpoint."]
-    #[serde(rename = "ruleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_sets: Vec<ResourceReference>,
     #[doc = "List of supported protocols for this route."]
-    #[serde(rename = "supportedProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_protocols: Vec<AfdEndpointProtocols>,
     #[doc = "The route patterns of the rule."]
-    #[serde(rename = "patternsToMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternsToMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub patterns_to_match: Vec<String>,
     #[doc = "Caching settings for a caching-type route. To disable caching, do not provide a cacheConfiguration object."]
     #[serde(rename = "cacheConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -6968,7 +7329,11 @@ impl Rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RuleListResult {
     #[doc = "List of AzureFrontDoor rules within a rule set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Rule>,
     #[doc = "URL to get the next set of rule objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7019,7 +7384,11 @@ impl RuleSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RuleSetListResult {
     #[doc = "List of AzureFrontDoor rule sets within a profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RuleSet>,
     #[doc = "URL to get the next set of rule set objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7072,10 +7441,18 @@ pub struct RuleUpdatePropertiesParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub order: Option<i32>,
     #[doc = "A list of conditions that must be matched for the actions to be executed"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<DeliveryRuleCondition>,
     #[doc = "A list of actions that are executed when all the conditions of a rule are satisfied."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<DeliveryRuleAction>,
     #[doc = "If this rule is a match should the rules engine continue running the remaining rules or stop. If not present, defaults to Continue."]
     #[serde(rename = "matchProcessingBehavior", default, skip_serializing_if = "Option::is_none")]
@@ -7144,7 +7521,11 @@ impl Secret {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecretListResult {
     #[doc = "List of AzureFrontDoor secrets within a profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Secret>,
     #[doc = "URL to get the next set of Secret objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7251,7 +7632,11 @@ impl SecurityPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityPolicyListResult {
     #[doc = "List of Security policies within a profile"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SecurityPolicy>,
     #[doc = "URL to get the next set of security policy objects if there is any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7363,10 +7748,19 @@ impl SecurityPolicyUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityPolicyWebApplicationFirewallAssociation {
     #[doc = "List of domains."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domains: Vec<ActivatedResourceReference>,
     #[doc = "List of paths"]
-    #[serde(rename = "patternsToMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternsToMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub patterns_to_match: Vec<String>,
 }
 impl SecurityPolicyWebApplicationFirewallAssociation {
@@ -7383,7 +7777,11 @@ pub struct SecurityPolicyWebApplicationFirewallParameters {
     #[serde(rename = "wafPolicy", default, skip_serializing_if = "Option::is_none")]
     pub waf_policy: Option<ResourceReference>,
     #[doc = "Waf associations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub associations: Vec<SecurityPolicyWebApplicationFirewallAssociation>,
 }
 impl SecurityPolicyWebApplicationFirewallParameters {
@@ -7406,10 +7804,19 @@ pub struct ServerPortMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl ServerPortMatchConditionParameters {
@@ -7490,10 +7897,20 @@ pub mod server_port_match_condition_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Log specifications of operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -7639,10 +8056,19 @@ pub struct SocketAddrMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl SocketAddrMatchConditionParameters {
@@ -7757,10 +8183,19 @@ pub struct SslProtocolMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<SslProtocol>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl SslProtocolMatchConditionParameters {
@@ -7835,7 +8270,12 @@ impl SsoUri {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedOptimizationTypesListResult {
     #[doc = "Supported optimization types for a profile."]
-    #[serde(rename = "supportedOptimizationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOptimizationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_optimization_types: Vec<OptimizationType>,
 }
 impl SupportedOptimizationTypesListResult {
@@ -7946,10 +8386,19 @@ pub struct UrlFileExtensionMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl UrlFileExtensionMatchConditionParameters {
@@ -8037,10 +8486,19 @@ pub struct UrlFileNameMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl UrlFileNameMatchConditionParameters {
@@ -8128,10 +8586,19 @@ pub struct UrlPathMatchConditionParameters {
     #[serde(rename = "negateCondition", default, skip_serializing_if = "Option::is_none")]
     pub negate_condition: Option<bool>,
     #[doc = "The match value for the condition of the delivery rule"]
-    #[serde(rename = "matchValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_values: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl UrlPathMatchConditionParameters {
@@ -8419,7 +8886,12 @@ pub struct UrlSigningActionParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub algorithm: Option<url_signing_action_parameters::Algorithm>,
     #[doc = "Defines which query string parameters in the url to be considered for expires, key id etc. "]
-    #[serde(rename = "parameterNameOverride", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parameterNameOverride",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameter_name_override: Vec<UrlSigningParamIdentifier>,
 }
 impl UrlSigningActionParameters {
@@ -8661,7 +9133,11 @@ impl UsageName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsagesListResult {
     #[doc = "The list of resource usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8859,7 +9335,11 @@ pub struct WafMetricsResponse {
     pub date_time_end: Option<time::OffsetDateTime>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub granularity: Option<waf_metrics_response::Granularity>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub series: Vec<serde_json::Value>,
 }
 impl WafMetricsResponse {
@@ -8886,9 +9366,17 @@ pub struct WafRankingsResponse {
     pub date_time_begin: Option<time::OffsetDateTime>,
     #[serde(rename = "dateTimeEnd", default, with = "azure_core::date::rfc3339::option")]
     pub date_time_end: Option<time::OffsetDateTime>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<serde_json::Value>,
 }
 impl WafRankingsResponse {
diff --git a/services/mgmt/changeanalysis/src/package_2020_04_01_preview/models.rs b/services/mgmt/changeanalysis/src/package_2020_04_01_preview/models.rs
index 21d0a6c7ee..31e1647f08 100644
--- a/services/mgmt/changeanalysis/src/package_2020_04_01_preview/models.rs
+++ b/services/mgmt/changeanalysis/src/package_2020_04_01_preview/models.rs
@@ -120,10 +120,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -344,7 +353,11 @@ impl ResourceProviderOperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "Resource provider operations list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperationDefinition>,
     #[doc = "The URI that can be used to request the next page for list of Azure operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/changeanalysis/src/package_2021_04_01/models.rs b/services/mgmt/changeanalysis/src/package_2021_04_01/models.rs
index cdb87304e5..0f0c7bd024 100644
--- a/services/mgmt/changeanalysis/src/package_2021_04_01/models.rs
+++ b/services/mgmt/changeanalysis/src/package_2021_04_01/models.rs
@@ -21,7 +21,11 @@ impl Change {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChangeList {
     #[doc = "The list of changes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Change>,
     #[doc = "The URI that can be used to request the next page of changes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -48,13 +52,23 @@ pub struct ChangeProperties {
     #[serde(rename = "timeStamp", default, with = "azure_core::date::rfc3339::option")]
     pub time_stamp: Option<time::OffsetDateTime>,
     #[doc = "The list of identities who might initiated the change.\r\nThe identity could be user name (email address) or the object ID of the Service Principal."]
-    #[serde(rename = "initiatedByList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "initiatedByList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub initiated_by_list: Vec<String>,
     #[doc = "The type of the change."]
     #[serde(rename = "changeType", default, skip_serializing_if = "Option::is_none")]
     pub change_type: Option<ChangeType>,
     #[doc = "The list of detailed changes at json property level."]
-    #[serde(rename = "propertyChanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyChanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_changes: Vec<PropertyChange>,
 }
 impl ChangeProperties {
@@ -129,10 +143,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -309,7 +332,11 @@ impl ResourceProviderOperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "Resource provider operations list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperationDefinition>,
     #[doc = "The URI that can be used to request the next page for list of Azure operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/changeanalysis/src/package_2021_04_01_preview/models.rs b/services/mgmt/changeanalysis/src/package_2021_04_01_preview/models.rs
index f5131389ca..997de2085d 100644
--- a/services/mgmt/changeanalysis/src/package_2021_04_01_preview/models.rs
+++ b/services/mgmt/changeanalysis/src/package_2021_04_01_preview/models.rs
@@ -21,7 +21,11 @@ impl Change {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChangeList {
     #[doc = "The list of changes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Change>,
     #[doc = "The URI that can be used to request the next page of changes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -48,13 +52,23 @@ pub struct ChangeProperties {
     #[serde(rename = "timeStamp", default, with = "azure_core::date::rfc3339::option")]
     pub time_stamp: Option<time::OffsetDateTime>,
     #[doc = "The list of identities who might initiated the change.\r\nThe identity could be user name (email address) or the object ID of the Service Principal."]
-    #[serde(rename = "initiatedByList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "initiatedByList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub initiated_by_list: Vec<String>,
     #[doc = "The type of the change."]
     #[serde(rename = "changeType", default, skip_serializing_if = "Option::is_none")]
     pub change_type: Option<ChangeType>,
     #[doc = "The list of detailed changes at json property level."]
-    #[serde(rename = "propertyChanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyChanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_changes: Vec<PropertyChange>,
 }
 impl ChangeProperties {
@@ -161,10 +175,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -397,7 +420,11 @@ impl ResourceProviderOperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "Resource provider operations list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperationDefinition>,
     #[doc = "The URI that can be used to request the next page for list of Azure operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/chaos/src/package_2021_09_15_preview/models.rs b/services/mgmt/chaos/src/package_2021_09_15_preview/models.rs
index 5cd8effdc7..4b627d1f6d 100644
--- a/services/mgmt/chaos/src/package_2021_09_15_preview/models.rs
+++ b/services/mgmt/chaos/src/package_2021_09_15_preview/models.rs
@@ -31,10 +31,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -189,7 +198,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -277,7 +290,11 @@ pub struct ActionStatus {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The array of targets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<ExperimentExecutionActionTargetDetailsProperties>,
 }
 impl ActionStatus {
@@ -311,7 +328,11 @@ pub struct BranchStatus {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "The array of actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<ActionStatus>,
 }
 impl BranchStatus {
@@ -340,7 +361,11 @@ impl Capability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilityListResult {
     #[doc = "List of Capability resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Capability>,
     #[doc = "Optional string that represents a URL."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -405,7 +430,11 @@ impl CapabilityType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilityTypeListResult {
     #[doc = "List of Capability Type resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapabilityType>,
     #[doc = "Optional string that represents a URL."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -552,7 +581,11 @@ impl ExperimentExecutionDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExperimentExecutionDetailsListResult {
     #[doc = "List of Experiment execution details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExperimentExecutionDetails>,
     #[doc = "Optional string that represents a URL."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -608,7 +641,11 @@ pub mod experiment_execution_details_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct RunInformation {
         #[doc = "The steps of the experiment run."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub steps: Vec<StepStatus>,
     }
     impl RunInformation {
@@ -621,7 +658,11 @@ pub mod experiment_execution_details_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExperimentListResult {
     #[doc = "List of Experiment resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Experiment>,
     #[doc = "Optional string that represents a URL."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -698,7 +739,11 @@ impl ExperimentStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExperimentStatusListResult {
     #[doc = "List of Experiment statuses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExperimentStatus>,
     #[doc = "Optional string that represents a URL."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -817,7 +862,11 @@ pub struct StepStatus {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "The array of branches."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub branches: Vec<BranchStatus>,
 }
 impl StepStatus {
@@ -965,7 +1014,11 @@ impl Target {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TargetListResult {
     #[doc = "List of Target resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Target>,
     #[doc = "Optional string that represents a URL."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1040,7 +1093,11 @@ impl TargetType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TargetTypeListResult {
     #[doc = "List of Target Type resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TargetType>,
     #[doc = "Optional string that represents a URL."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1070,7 +1127,12 @@ pub struct TargetTypeProperties {
     #[serde(rename = "propertiesSchema", default, skip_serializing_if = "Option::is_none")]
     pub properties_schema: Option<Url>,
     #[doc = "List of resource types this Target Type can extend."]
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<String>,
 }
 impl TargetTypeProperties {
diff --git a/services/mgmt/chaos/src/package_2022_07_01_preview/models.rs b/services/mgmt/chaos/src/package_2022_07_01_preview/models.rs
index 0baa49c1e8..47496d96ab 100644
--- a/services/mgmt/chaos/src/package_2022_07_01_preview/models.rs
+++ b/services/mgmt/chaos/src/package_2022_07_01_preview/models.rs
@@ -31,10 +31,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -189,7 +198,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -277,7 +290,11 @@ pub struct ActionStatus {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The array of targets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<ExperimentExecutionActionTargetDetailsProperties>,
 }
 impl ActionStatus {
@@ -311,7 +328,11 @@ pub struct BranchStatus {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "The array of actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<ActionStatus>,
 }
 impl BranchStatus {
@@ -340,7 +361,11 @@ impl Capability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilityListResult {
     #[doc = "List of Capability resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Capability>,
     #[doc = "Optional string that represents a URL."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -405,7 +430,11 @@ impl CapabilityType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilityTypeListResult {
     #[doc = "List of Capability Type resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapabilityType>,
     #[doc = "Optional string that represents a URL."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -573,7 +602,11 @@ impl ExperimentExecutionDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExperimentExecutionDetailsListResult {
     #[doc = "List of Experiment execution details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExperimentExecutionDetails>,
     #[doc = "Optional string that represents a URL."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -629,7 +662,11 @@ pub mod experiment_execution_details_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct RunInformation {
         #[doc = "The steps of the experiment run."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub steps: Vec<StepStatus>,
     }
     impl RunInformation {
@@ -642,7 +679,11 @@ pub mod experiment_execution_details_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExperimentListResult {
     #[doc = "List of Experiment resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Experiment>,
     #[doc = "Optional string that represents a URL."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -719,7 +760,11 @@ impl ExperimentStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExperimentStatusListResult {
     #[doc = "List of Experiment statuses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExperimentStatus>,
     #[doc = "Optional string that represents a URL."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -838,7 +883,11 @@ pub struct StepStatus {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "The array of branches."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub branches: Vec<BranchStatus>,
 }
 impl StepStatus {
@@ -986,7 +1035,11 @@ impl Target {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TargetListResult {
     #[doc = "List of Target resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Target>,
     #[doc = "Optional string that represents a URL."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1061,7 +1114,11 @@ impl TargetType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TargetTypeListResult {
     #[doc = "List of Target Type resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TargetType>,
     #[doc = "Optional string that represents a URL."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1091,7 +1148,12 @@ pub struct TargetTypeProperties {
     #[serde(rename = "propertiesSchema", default, skip_serializing_if = "Option::is_none")]
     pub properties_schema: Option<Url>,
     #[doc = "List of resource types this Target Type can extend."]
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<String>,
 }
 impl TargetTypeProperties {
diff --git a/services/mgmt/cognitiveservices/src/package_2016_02_preview/models.rs b/services/mgmt/cognitiveservices/src/package_2016_02_preview/models.rs
index 217e92d41c..e47c7ab2b6 100644
--- a/services/mgmt/cognitiveservices/src/package_2016_02_preview/models.rs
+++ b/services/mgmt/cognitiveservices/src/package_2016_02_preview/models.rs
@@ -149,7 +149,11 @@ pub mod cognitive_services_account_create_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CognitiveServicesAccountEnumerateSkusResult {
     #[doc = "Gets the list of Cognitive Services accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CognitiveServicesResourceAndSku>,
 }
 impl CognitiveServicesAccountEnumerateSkusResult {
@@ -176,7 +180,11 @@ impl CognitiveServicesAccountKeys {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CognitiveServicesAccountListResult {
     #[doc = "Gets the list of Cognitive Services accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CognitiveServicesAccount>,
 }
 impl azure_core::Continuable for CognitiveServicesAccountListResult {
diff --git a/services/mgmt/cognitiveservices/src/package_2017_04/models.rs b/services/mgmt/cognitiveservices/src/package_2017_04/models.rs
index e942516e31..8fe652a2dc 100644
--- a/services/mgmt/cognitiveservices/src/package_2017_04/models.rs
+++ b/services/mgmt/cognitiveservices/src/package_2017_04/models.rs
@@ -86,7 +86,11 @@ impl CheckSkuAvailabilityResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CheckSkuAvailabilityResultList {
     #[doc = "Check SKU availability result list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CheckSkuAvailabilityResult>,
 }
 impl CheckSkuAvailabilityResultList {
@@ -176,7 +180,11 @@ impl CognitiveServicesAccountApiProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CognitiveServicesAccountEnumerateSkusResult {
     #[doc = "Gets the list of Cognitive Services accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CognitiveServicesResourceAndSku>,
 }
 impl CognitiveServicesAccountEnumerateSkusResult {
@@ -207,7 +215,11 @@ pub struct CognitiveServicesAccountListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of Cognitive Services accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CognitiveServicesAccount>,
 }
 impl azure_core::Continuable for CognitiveServicesAccountListResult {
@@ -234,7 +246,11 @@ pub struct CognitiveServicesAccountProperties {
     #[serde(rename = "internalId", default, skip_serializing_if = "Option::is_none")]
     pub internal_id: Option<String>,
     #[doc = "Gets the capabilities of the cognitive services account. Each item indicates the capability of a specific feature. The values are read-only and for reference only."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
     #[doc = "If the resource is migrated from an existing key."]
     #[serde(rename = "isMigrated", default, skip_serializing_if = "Option::is_none")]
@@ -252,10 +268,20 @@ pub struct CognitiveServicesAccountProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<Encryption>,
     #[doc = "The storage accounts for this resource."]
-    #[serde(rename = "userOwnedStorage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userOwnedStorage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_owned_storage: Vec<UserOwnedStorage>,
     #[doc = "The private endpoint connection associated with the Cognitive Services account."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Whether or not public endpoint access is allowed for this account. Value is optional but if passed in, must be 'Enabled' or 'Disabled'"]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -566,10 +592,20 @@ pub struct NetworkRuleSet {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<network_rule_set::DefaultAction>,
     #[doc = "The list of IP address rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
     #[doc = "The list of virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
 }
 impl NetworkRuleSet {
@@ -666,7 +702,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
@@ -716,7 +756,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -734,7 +778,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "privateLinkServiceConnectionState")]
     pub private_link_service_connection_state: PrivateLinkServiceConnectionState,
     #[doc = "The private link resource group ids."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
 }
 impl PrivateEndpointConnectionProperties {
@@ -805,7 +854,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -823,10 +876,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -907,10 +970,18 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kind: Option<String>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -921,10 +992,18 @@ impl ResourceSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuRestrictionInfo {
     #[doc = "Locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "List of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuRestrictionInfo {
@@ -939,7 +1018,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
     pub restriction_info: Option<ResourceSkuRestrictionInfo>,
@@ -1217,7 +1300,11 @@ pub mod usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsagesResult {
     #[doc = "The list of usages for Cognitive Service account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl UsagesResult {
diff --git a/services/mgmt/cognitiveservices/src/package_2021_04/models.rs b/services/mgmt/cognitiveservices/src/package_2021_04/models.rs
index 7adedd1bee..e24dbfe981 100644
--- a/services/mgmt/cognitiveservices/src/package_2021_04/models.rs
+++ b/services/mgmt/cognitiveservices/src/package_2021_04/models.rs
@@ -42,7 +42,11 @@ pub struct AccountListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of Cognitive Services accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
 }
 impl azure_core::Continuable for AccountListResult {
@@ -69,7 +73,11 @@ pub struct AccountProperties {
     #[serde(rename = "internalId", default, skip_serializing_if = "Option::is_none")]
     pub internal_id: Option<String>,
     #[doc = "Gets the capabilities of the cognitive services account. Each item indicates the capability of a specific feature. The values are read-only and for reference only."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
     #[doc = "If the resource is migrated from an existing key."]
     #[serde(rename = "isMigrated", default, skip_serializing_if = "Option::is_none")]
@@ -90,10 +98,20 @@ pub struct AccountProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<Encryption>,
     #[doc = "The storage accounts for this resource."]
-    #[serde(rename = "userOwnedStorage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userOwnedStorage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_owned_storage: Vec<UserOwnedStorage>,
     #[doc = "The private endpoint connection associated with the Cognitive Services account."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Whether or not public endpoint access is allowed for this account. Value is optional but if passed in, must be 'Enabled' or 'Disabled'"]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -111,7 +129,12 @@ pub struct AccountProperties {
     pub quota_limit: Option<QuotaLimit>,
     #[serde(rename = "restrictOutboundNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub restrict_outbound_network_access: Option<bool>,
-    #[serde(rename = "allowedFqdnList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedFqdnList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_fqdn_list: Vec<String>,
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
     pub disable_local_auth: Option<bool>,
@@ -232,7 +255,11 @@ impl AccountSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountSkuListResult {
     #[doc = "Gets the list of Cognitive Services accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccountSku>,
 }
 impl AccountSkuListResult {
@@ -317,7 +344,11 @@ pub struct CallRateLimit {
     #[doc = "The renewal period in seconds of Call Rate Limit."]
     #[serde(rename = "renewalPeriod", default, skip_serializing_if = "Option::is_none")]
     pub renewal_period: Option<f64>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ThrottlingRule>,
 }
 impl CallRateLimit {
@@ -467,10 +498,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -583,10 +623,20 @@ pub struct NetworkRuleSet {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<network_rule_set::DefaultAction>,
     #[doc = "The list of IP address rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
     #[doc = "The list of virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
 }
 impl NetworkRuleSet {
@@ -763,7 +813,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -816,7 +870,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -837,7 +895,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<PrivateEndpointConnectionProvisioningState>,
     #[doc = "The private link resource group ids."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
 }
 impl PrivateEndpointConnectionProperties {
@@ -948,7 +1011,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -963,10 +1030,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "The private link resource display name."]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
@@ -1001,7 +1078,11 @@ pub struct QuotaLimit {
     pub count: Option<f64>,
     #[serde(rename = "renewalPeriod", default, skip_serializing_if = "Option::is_none")]
     pub renewal_period: Option<f64>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ThrottlingRule>,
 }
 impl QuotaLimit {
@@ -1076,10 +1157,18 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kind: Option<String>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -1110,10 +1199,18 @@ impl ResourceSkuListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuRestrictionInfo {
     #[doc = "Locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "List of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuRestrictionInfo {
@@ -1128,7 +1225,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
     pub restriction_info: Option<ResourceSkuRestrictionInfo>,
@@ -1293,7 +1394,11 @@ impl SkuAvailability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuAvailabilityListResult {
     #[doc = "Check SKU availability result list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuAvailability>,
 }
 impl SkuAvailabilityListResult {
@@ -1347,7 +1452,12 @@ pub struct ThrottlingRule {
     pub min_count: Option<f64>,
     #[serde(rename = "dynamicThrottlingEnabled", default, skip_serializing_if = "Option::is_none")]
     pub dynamic_throttling_enabled: Option<bool>,
-    #[serde(rename = "matchPatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchPatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_patterns: Vec<RequestMatchPattern>,
 }
 impl ThrottlingRule {
@@ -1480,7 +1590,11 @@ pub mod usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "The list of usages for Cognitive Service account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl UsageListResult {
diff --git a/services/mgmt/cognitiveservices/src/package_2021_10/models.rs b/services/mgmt/cognitiveservices/src/package_2021_10/models.rs
index 1e5e8f9243..eb33458cb2 100644
--- a/services/mgmt/cognitiveservices/src/package_2021_10/models.rs
+++ b/services/mgmt/cognitiveservices/src/package_2021_10/models.rs
@@ -42,7 +42,11 @@ pub struct AccountListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of Cognitive Services accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
 }
 impl azure_core::Continuable for AccountListResult {
@@ -69,7 +73,11 @@ pub struct AccountProperties {
     #[serde(rename = "internalId", default, skip_serializing_if = "Option::is_none")]
     pub internal_id: Option<String>,
     #[doc = "Gets the capabilities of the cognitive services account. Each item indicates the capability of a specific feature. The values are read-only and for reference only."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
     #[doc = "If the resource is migrated from an existing key."]
     #[serde(rename = "isMigrated", default, skip_serializing_if = "Option::is_none")]
@@ -90,10 +98,20 @@ pub struct AccountProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<Encryption>,
     #[doc = "The storage accounts for this resource."]
-    #[serde(rename = "userOwnedStorage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userOwnedStorage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_owned_storage: Vec<UserOwnedStorage>,
     #[doc = "The private endpoint connection associated with the Cognitive Services account."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Whether or not public endpoint access is allowed for this account. Value is optional but if passed in, must be 'Enabled' or 'Disabled'"]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -111,7 +129,12 @@ pub struct AccountProperties {
     pub quota_limit: Option<QuotaLimit>,
     #[serde(rename = "restrictOutboundNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub restrict_outbound_network_access: Option<bool>,
-    #[serde(rename = "allowedFqdnList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedFqdnList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_fqdn_list: Vec<String>,
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
     pub disable_local_auth: Option<bool>,
@@ -232,7 +255,11 @@ impl AccountSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountSkuListResult {
     #[doc = "Gets the list of Cognitive Services accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccountSku>,
 }
 impl AccountSkuListResult {
@@ -317,7 +344,11 @@ pub struct CallRateLimit {
     #[doc = "The renewal period in seconds of Call Rate Limit."]
     #[serde(rename = "renewalPeriod", default, skip_serializing_if = "Option::is_none")]
     pub renewal_period: Option<f64>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ThrottlingRule>,
 }
 impl CallRateLimit {
@@ -429,7 +460,11 @@ pub struct CommitmentPlanListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of Cognitive Services accounts CommitmentPlan and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CommitmentPlan>,
 }
 impl azure_core::Continuable for CommitmentPlanListResult {
@@ -525,7 +560,11 @@ pub struct CommitmentTierListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of Cognitive Services accounts CommitmentTier and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CommitmentTier>,
 }
 impl azure_core::Continuable for CommitmentTierListResult {
@@ -566,7 +605,11 @@ pub struct DeploymentListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of Cognitive Services accounts Deployment and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Deployment>,
 }
 impl azure_core::Continuable for DeploymentListResult {
@@ -833,10 +876,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -988,10 +1040,20 @@ pub struct NetworkRuleSet {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<network_rule_set::DefaultAction>,
     #[doc = "The list of IP address rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
     #[doc = "The list of virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
 }
 impl NetworkRuleSet {
@@ -1168,7 +1230,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1221,7 +1287,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -1242,7 +1312,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<PrivateEndpointConnectionProvisioningState>,
     #[doc = "The private link resource group ids."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
 }
 impl PrivateEndpointConnectionProperties {
@@ -1353,7 +1428,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -1368,10 +1447,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "The private link resource display name."]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
@@ -1417,7 +1506,11 @@ pub struct QuotaLimit {
     pub count: Option<f64>,
     #[serde(rename = "renewalPeriod", default, skip_serializing_if = "Option::is_none")]
     pub renewal_period: Option<f64>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ThrottlingRule>,
 }
 impl QuotaLimit {
@@ -1492,10 +1585,18 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kind: Option<String>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -1526,10 +1627,18 @@ impl ResourceSkuListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuRestrictionInfo {
     #[doc = "Locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "List of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuRestrictionInfo {
@@ -1544,7 +1653,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
     pub restriction_info: Option<ResourceSkuRestrictionInfo>,
@@ -1709,7 +1822,11 @@ impl SkuAvailability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuAvailabilityListResult {
     #[doc = "Check SKU availability result list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuAvailability>,
 }
 impl SkuAvailabilityListResult {
@@ -1763,7 +1880,12 @@ pub struct ThrottlingRule {
     pub min_count: Option<f64>,
     #[serde(rename = "dynamicThrottlingEnabled", default, skip_serializing_if = "Option::is_none")]
     pub dynamic_throttling_enabled: Option<bool>,
-    #[serde(rename = "matchPatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchPatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_patterns: Vec<RequestMatchPattern>,
 }
 impl ThrottlingRule {
@@ -1896,7 +2018,11 @@ pub mod usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "The list of usages for Cognitive Service account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl UsageListResult {
diff --git a/services/mgmt/cognitiveservices/src/package_2022_03/models.rs b/services/mgmt/cognitiveservices/src/package_2022_03/models.rs
index 04f17a760c..aaf23f9911 100644
--- a/services/mgmt/cognitiveservices/src/package_2022_03/models.rs
+++ b/services/mgmt/cognitiveservices/src/package_2022_03/models.rs
@@ -42,7 +42,11 @@ pub struct AccountListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of Cognitive Services accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
 }
 impl azure_core::Continuable for AccountListResult {
@@ -89,7 +93,11 @@ pub struct AccountModelListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of Cognitive Services accounts Model and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccountModel>,
 }
 impl azure_core::Continuable for AccountModelListResult {
@@ -116,7 +124,11 @@ pub struct AccountProperties {
     #[serde(rename = "internalId", default, skip_serializing_if = "Option::is_none")]
     pub internal_id: Option<String>,
     #[doc = "Gets the capabilities of the cognitive services account. Each item indicates the capability of a specific feature. The values are read-only and for reference only."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
     #[doc = "If the resource is migrated from an existing key."]
     #[serde(rename = "isMigrated", default, skip_serializing_if = "Option::is_none")]
@@ -137,10 +149,20 @@ pub struct AccountProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<Encryption>,
     #[doc = "The storage accounts for this resource."]
-    #[serde(rename = "userOwnedStorage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userOwnedStorage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_owned_storage: Vec<UserOwnedStorage>,
     #[doc = "The private endpoint connection associated with the Cognitive Services account."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Whether or not public endpoint access is allowed for this account."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -161,7 +183,12 @@ pub struct AccountProperties {
     pub quota_limit: Option<QuotaLimit>,
     #[serde(rename = "restrictOutboundNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub restrict_outbound_network_access: Option<bool>,
-    #[serde(rename = "allowedFqdnList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedFqdnList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_fqdn_list: Vec<String>,
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
     pub disable_local_auth: Option<bool>,
@@ -288,7 +315,11 @@ impl AccountSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountSkuListResult {
     #[doc = "Gets the list of Cognitive Services accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccountSku>,
 }
 impl AccountSkuListResult {
@@ -373,7 +404,11 @@ pub struct CallRateLimit {
     #[doc = "The renewal period in seconds of Call Rate Limit."]
     #[serde(rename = "renewalPeriod", default, skip_serializing_if = "Option::is_none")]
     pub renewal_period: Option<f64>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ThrottlingRule>,
 }
 impl CallRateLimit {
@@ -485,7 +520,11 @@ pub struct CommitmentPlanListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of Cognitive Services accounts CommitmentPlan and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CommitmentPlan>,
 }
 impl azure_core::Continuable for CommitmentPlanListResult {
@@ -581,7 +620,11 @@ pub struct CommitmentTierListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of Cognitive Services accounts CommitmentTier and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CommitmentTier>,
 }
 impl azure_core::Continuable for CommitmentTierListResult {
@@ -622,7 +665,11 @@ pub struct DeploymentListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of Cognitive Services accounts Deployment and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Deployment>,
 }
 impl azure_core::Continuable for DeploymentListResult {
@@ -892,10 +939,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -1062,10 +1118,20 @@ pub struct NetworkRuleSet {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<network_rule_set::DefaultAction>,
     #[doc = "The list of IP address rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
     #[doc = "The list of virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
 }
 impl NetworkRuleSet {
@@ -1242,7 +1308,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1295,7 +1365,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -1316,7 +1390,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<PrivateEndpointConnectionProvisioningState>,
     #[doc = "The private link resource group ids."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
 }
 impl PrivateEndpointConnectionProperties {
@@ -1427,7 +1506,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -1442,10 +1525,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "The private link resource display name."]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
@@ -1491,7 +1584,11 @@ pub struct QuotaLimit {
     pub count: Option<f64>,
     #[serde(rename = "renewalPeriod", default, skip_serializing_if = "Option::is_none")]
     pub renewal_period: Option<f64>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ThrottlingRule>,
 }
 impl QuotaLimit {
@@ -1566,10 +1663,18 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kind: Option<String>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -1600,10 +1705,18 @@ impl ResourceSkuListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuRestrictionInfo {
     #[doc = "Locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "List of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuRestrictionInfo {
@@ -1618,7 +1731,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
     pub restriction_info: Option<ResourceSkuRestrictionInfo>,
@@ -1783,7 +1900,11 @@ impl SkuAvailability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuAvailabilityListResult {
     #[doc = "Check SKU availability result list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuAvailability>,
 }
 impl SkuAvailabilityListResult {
@@ -1837,7 +1958,12 @@ pub struct ThrottlingRule {
     pub min_count: Option<f64>,
     #[serde(rename = "dynamicThrottlingEnabled", default, skip_serializing_if = "Option::is_none")]
     pub dynamic_throttling_enabled: Option<bool>,
-    #[serde(rename = "matchPatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchPatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_patterns: Vec<RequestMatchPattern>,
 }
 impl ThrottlingRule {
@@ -1970,7 +2096,11 @@ pub mod usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "The list of usages for Cognitive Service account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl UsageListResult {
diff --git a/services/mgmt/commerce/src/package_2015_06_preview/models.rs b/services/mgmt/commerce/src/package_2015_06_preview/models.rs
index 5fc23f775b..ebf1fbf886 100644
--- a/services/mgmt/commerce/src/package_2015_06_preview/models.rs
+++ b/services/mgmt/commerce/src/package_2015_06_preview/models.rs
@@ -55,7 +55,12 @@ pub struct MeterInfo {
     #[serde(rename = "Unit", default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Provides additional meter data. 'Third Party' indicates a meter with no discount. Blanks indicate First Party."]
-    #[serde(rename = "MeterTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "MeterTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meter_tags: Vec<String>,
     #[doc = "The region in which the Azure service is available."]
     #[serde(rename = "MeterRegion", default, skip_serializing_if = "Option::is_none")]
@@ -84,7 +89,12 @@ pub struct MonetaryCommitment {
     #[serde(rename = "TieredDiscount", default, skip_serializing_if = "Option::is_none")]
     pub tiered_discount: Option<serde_json::Value>,
     #[doc = "An array of meter ids that are excluded from the given offer terms."]
-    #[serde(rename = "ExcludedMeterIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ExcludedMeterIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_meter_ids: Vec<String>,
 }
 impl MonetaryCommitment {
@@ -105,7 +115,12 @@ pub struct MonetaryCredit {
     #[serde(rename = "Credit", default, skip_serializing_if = "Option::is_none")]
     pub credit: Option<f64>,
     #[doc = "An array of meter ids that are excluded from the given offer terms."]
-    #[serde(rename = "ExcludedMeterIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ExcludedMeterIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_meter_ids: Vec<String>,
 }
 impl MonetaryCredit {
@@ -204,10 +219,20 @@ pub struct ResourceRateCardInfo {
     #[serde(rename = "IsTaxIncluded", default, skip_serializing_if = "Option::is_none")]
     pub is_tax_included: Option<bool>,
     #[doc = "A list of offer terms."]
-    #[serde(rename = "OfferTerms", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "OfferTerms",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub offer_terms: Vec<OfferTermInfo>,
     #[doc = "A list of meters."]
-    #[serde(rename = "Meters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Meters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meters: Vec<MeterInfo>,
 }
 impl ResourceRateCardInfo {
@@ -240,7 +265,11 @@ impl UsageAggregation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageAggregationListResult {
     #[doc = "Gets or sets details for the requested aggregation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UsageAggregation>,
     #[doc = "Gets or sets the link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/commerce/src/profile_hybrid_2020_09_01/models.rs b/services/mgmt/commerce/src/profile_hybrid_2020_09_01/models.rs
index 5fc23f775b..ebf1fbf886 100644
--- a/services/mgmt/commerce/src/profile_hybrid_2020_09_01/models.rs
+++ b/services/mgmt/commerce/src/profile_hybrid_2020_09_01/models.rs
@@ -55,7 +55,12 @@ pub struct MeterInfo {
     #[serde(rename = "Unit", default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Provides additional meter data. 'Third Party' indicates a meter with no discount. Blanks indicate First Party."]
-    #[serde(rename = "MeterTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "MeterTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meter_tags: Vec<String>,
     #[doc = "The region in which the Azure service is available."]
     #[serde(rename = "MeterRegion", default, skip_serializing_if = "Option::is_none")]
@@ -84,7 +89,12 @@ pub struct MonetaryCommitment {
     #[serde(rename = "TieredDiscount", default, skip_serializing_if = "Option::is_none")]
     pub tiered_discount: Option<serde_json::Value>,
     #[doc = "An array of meter ids that are excluded from the given offer terms."]
-    #[serde(rename = "ExcludedMeterIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ExcludedMeterIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_meter_ids: Vec<String>,
 }
 impl MonetaryCommitment {
@@ -105,7 +115,12 @@ pub struct MonetaryCredit {
     #[serde(rename = "Credit", default, skip_serializing_if = "Option::is_none")]
     pub credit: Option<f64>,
     #[doc = "An array of meter ids that are excluded from the given offer terms."]
-    #[serde(rename = "ExcludedMeterIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ExcludedMeterIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_meter_ids: Vec<String>,
 }
 impl MonetaryCredit {
@@ -204,10 +219,20 @@ pub struct ResourceRateCardInfo {
     #[serde(rename = "IsTaxIncluded", default, skip_serializing_if = "Option::is_none")]
     pub is_tax_included: Option<bool>,
     #[doc = "A list of offer terms."]
-    #[serde(rename = "OfferTerms", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "OfferTerms",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub offer_terms: Vec<OfferTermInfo>,
     #[doc = "A list of meters."]
-    #[serde(rename = "Meters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Meters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meters: Vec<MeterInfo>,
 }
 impl ResourceRateCardInfo {
@@ -240,7 +265,11 @@ impl UsageAggregation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageAggregationListResult {
     #[doc = "Gets or sets details for the requested aggregation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UsageAggregation>,
     #[doc = "Gets or sets the link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/communication/src/package_2020_08_20/models.rs b/services/mgmt/communication/src/package_2020_08_20/models.rs
index 50c3974f2c..f705d583d8 100644
--- a/services/mgmt/communication/src/package_2020_08_20/models.rs
+++ b/services/mgmt/communication/src/package_2020_08_20/models.rs
@@ -137,7 +137,11 @@ impl CommunicationServiceResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CommunicationServiceResourceList {
     #[doc = "List of CommunicationService"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CommunicationServiceResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -182,10 +186,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -414,7 +427,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/communication/src/package_2020_08_20_preview/models.rs b/services/mgmt/communication/src/package_2020_08_20_preview/models.rs
index 95fa41dff3..43979a2af5 100644
--- a/services/mgmt/communication/src/package_2020_08_20_preview/models.rs
+++ b/services/mgmt/communication/src/package_2020_08_20_preview/models.rs
@@ -134,7 +134,11 @@ impl CommunicationServiceResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CommunicationServiceResourceList {
     #[doc = "List of CommunicationService"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CommunicationServiceResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -275,7 +279,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The dimensions of the metrics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
 }
 impl MetricSpecification {
@@ -407,7 +415,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -554,7 +566,12 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Metrics for Azure Monitoring."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
diff --git a/services/mgmt/communication/src/package_2021_10_01_preview/models.rs b/services/mgmt/communication/src/package_2021_10_01_preview/models.rs
index 7e25dd4efd..eebae3bb11 100644
--- a/services/mgmt/communication/src/package_2021_10_01_preview/models.rs
+++ b/services/mgmt/communication/src/package_2021_10_01_preview/models.rs
@@ -214,7 +214,11 @@ impl CommunicationServiceResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CommunicationServiceResourceList {
     #[doc = "List of CommunicationService"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CommunicationServiceResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -492,7 +496,11 @@ impl DomainResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainResourceList {
     #[doc = "List of Domains resource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DomainResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -607,7 +615,11 @@ impl EmailServiceResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EmailServiceResourceList {
     #[doc = "List of EmailService"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EmailServiceResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -663,10 +675,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -864,7 +885,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/communication/src/package_preview_2022_07/models.rs b/services/mgmt/communication/src/package_preview_2022_07/models.rs
index b781b80856..a5cd0fdce1 100644
--- a/services/mgmt/communication/src/package_preview_2022_07/models.rs
+++ b/services/mgmt/communication/src/package_preview_2022_07/models.rs
@@ -210,7 +210,11 @@ impl CommunicationServiceResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CommunicationServiceResourceList {
     #[doc = "List of CommunicationService"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CommunicationServiceResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -484,7 +488,11 @@ impl DomainResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainResourceList {
     #[doc = "List of Domains resource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DomainResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -595,7 +603,11 @@ impl EmailServiceResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EmailServiceResourceList {
     #[doc = "List of EmailService"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EmailServiceResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -651,10 +663,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -852,7 +873,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/compute/src/package_2021_12_01/models.rs b/services/mgmt/compute/src/package_2021_12_01/models.rs
index 1d19777e7f..239029f971 100644
--- a/services/mgmt/compute/src/package_2021_12_01/models.rs
+++ b/services/mgmt/compute/src/package_2021_12_01/models.rs
@@ -90,7 +90,11 @@ impl ApiEntityReference {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiError {
     #[doc = "The Api error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ApiErrorBase>,
     #[doc = "Inner error details."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -132,7 +136,12 @@ impl ApiErrorBase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationProfile {
     #[doc = "Specifies the gallery applications that should be made available to the VM/VMSS"]
-    #[serde(rename = "galleryApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "galleryApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gallery_applications: Vec<VmGalleryApplication>,
 }
 impl ApplicationProfile {
@@ -318,12 +327,21 @@ pub struct AvailabilitySetProperties {
     #[serde(rename = "platformFaultDomainCount", default, skip_serializing_if = "Option::is_none")]
     pub platform_fault_domain_count: Option<i32>,
     #[doc = "A list of references to all virtual machines in the availability set."]
-    #[serde(rename = "virtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines: Vec<SubResource>,
     #[serde(rename = "proximityPlacementGroup", default, skip_serializing_if = "Option::is_none")]
     pub proximity_placement_group: Option<SubResource>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl AvailabilitySetProperties {
@@ -527,7 +545,11 @@ pub struct CapacityReservation {
     #[doc = "Describes a virtual machine scale set sku. NOTE: If the new VM SKU is not supported on the hardware the scale set is currently on, you need to deallocate the VMs in the scale set before you modify the SKU name."]
     pub sku: Sku,
     #[doc = "Availability Zone to use for this capacity reservation. The zone has to be single value and also should be part for the list of zones specified during the capacity reservation group creation. The zone can be assigned only during creation. If not provided, the reservation supports only non-zonal deployments. If provided, enforces VM/VMSS using this capacity reservation to be in same zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl CapacityReservation {
@@ -549,7 +571,11 @@ pub struct CapacityReservationGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<CapacityReservationGroupProperties>,
     #[doc = "Availability Zones to use for this capacity reservation group. The zones can be assigned only during creation. If not provided, the group supports only regional resources in the region. If provided, enforces each capacity reservation in the group to be in one of the zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl CapacityReservationGroup {
@@ -564,7 +590,12 @@ impl CapacityReservationGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityReservationGroupInstanceView {
     #[doc = "List of instance view of the capacity reservations under the capacity reservation group."]
-    #[serde(rename = "capacityReservations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "capacityReservations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capacity_reservations: Vec<CapacityReservationInstanceViewWithName>,
 }
 impl CapacityReservationGroupInstanceView {
@@ -596,10 +627,20 @@ impl CapacityReservationGroupListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityReservationGroupProperties {
     #[doc = "A list of all capacity reservation resource ids that belong to capacity reservation group."]
-    #[serde(rename = "capacityReservations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "capacityReservations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capacity_reservations: Vec<SubResourceReadOnly>,
     #[doc = "A list of references to all virtual machines associated to the capacity reservation group."]
-    #[serde(rename = "virtualMachinesAssociated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachinesAssociated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines_associated: Vec<SubResourceReadOnly>,
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<CapacityReservationGroupInstanceView>,
@@ -630,7 +671,11 @@ pub struct CapacityReservationInstanceView {
     #[serde(rename = "utilizationInfo", default, skip_serializing_if = "Option::is_none")]
     pub utilization_info: Option<CapacityReservationUtilization>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl CapacityReservationInstanceView {
@@ -690,7 +735,12 @@ pub struct CapacityReservationProperties {
     #[serde(rename = "reservationId", default, skip_serializing_if = "Option::is_none")]
     pub reservation_id: Option<String>,
     #[doc = "A list of all virtual machine resource ids that are associated with the capacity reservation."]
-    #[serde(rename = "virtualMachinesAssociated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachinesAssociated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines_associated: Vec<SubResourceReadOnly>,
     #[doc = "The date time when the capacity reservation was last updated."]
     #[serde(rename = "provisioningTime", default, with = "azure_core::date::rfc3339::option")]
@@ -731,7 +781,12 @@ impl CapacityReservationUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityReservationUtilization {
     #[doc = "A list of all virtual machines resource ids allocated against the capacity reservation."]
-    #[serde(rename = "virtualMachinesAllocated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachinesAllocated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines_allocated: Vec<SubResourceReadOnly>,
 }
 impl CapacityReservationUtilization {
@@ -794,7 +849,11 @@ impl CloudService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceExtensionProfile {
     #[doc = "List of extensions for the cloud service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<Extension>,
 }
 impl CloudServiceExtensionProfile {
@@ -832,7 +891,12 @@ pub struct CloudServiceExtensionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "Optional list of roles to apply this extension. If property is not specified or '*' is specified, extension is applied to all roles in the cloud service."]
-    #[serde(rename = "rolesAppliedTo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rolesAppliedTo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles_applied_to: Vec<String>,
 }
 impl CloudServiceExtensionProperties {
@@ -850,9 +914,18 @@ pub struct CloudServiceInstanceView {
     #[serde(rename = "sdkVersion", default, skip_serializing_if = "Option::is_none")]
     pub sdk_version: Option<String>,
     #[doc = "Specifies a list of unique identifiers generated internally for the cloud service. <br /><br /> NOTE: If you are using Azure Diagnostics extension, this property can be used as 'DeploymentId' for querying details."]
-    #[serde(rename = "privateIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ids: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceInstanceViewStatus>,
 }
 impl CloudServiceInstanceView {
@@ -881,7 +954,12 @@ impl CloudServiceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceNetworkProfile {
     #[doc = "List of Load balancer configurations. Cloud service can have up to two load balancer configurations, corresponding to a Public Load Balancer and an Internal Load Balancer."]
-    #[serde(rename = "loadBalancerConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_configurations: Vec<LoadBalancerConfiguration>,
     #[serde(rename = "swappableCloudService", default, skip_serializing_if = "Option::is_none")]
     pub swappable_cloud_service: Option<SubResource>,
@@ -895,7 +973,11 @@ impl CloudServiceNetworkProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceOsProfile {
     #[doc = "Specifies set of certificates that should be installed onto the role instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<CloudServiceVaultSecretGroup>,
 }
 impl CloudServiceOsProfile {
@@ -996,7 +1078,11 @@ impl CloudServiceRoleListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceRoleProfile {
     #[doc = "List of roles for the cloud service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<CloudServiceRoleProfileProperties>,
 }
 impl CloudServiceRoleProfile {
@@ -1129,7 +1215,12 @@ pub struct CloudServiceVaultSecretGroup {
     #[serde(rename = "sourceVault", default, skip_serializing_if = "Option::is_none")]
     pub source_vault: Option<SubResource>,
     #[doc = "The list of key vault references in SourceVault which contain certificates."]
-    #[serde(rename = "vaultCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_certificates: Vec<CloudServiceVaultCertificate>,
 }
 impl CloudServiceVaultSecretGroup {
@@ -1198,7 +1289,11 @@ pub struct CommunityGalleryImageProperties {
     #[serde(rename = "hyperVGeneration", default, skip_serializing_if = "Option::is_none")]
     pub hyper_v_generation: Option<community_gallery_image_properties::HyperVGeneration>,
     #[doc = "A list of gallery image features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<GalleryImageFeature>,
     #[doc = "Describes the gallery image definition purchase plan. This is used by marketplace images."]
     #[serde(rename = "purchasePlan", default, skip_serializing_if = "Option::is_none")]
@@ -1323,7 +1418,12 @@ pub struct CommunityGalleryInfo {
     #[serde(rename = "communityGalleryEnabled", default, skip_serializing_if = "Option::is_none")]
     pub community_gallery_enabled: Option<bool>,
     #[doc = "Community gallery public name list."]
-    #[serde(rename = "publicNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_names: Vec<String>,
 }
 impl CommunityGalleryInfo {
@@ -1335,7 +1435,11 @@ impl CommunityGalleryInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeOperationListResult {
     #[doc = "The list of compute operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputeOperationValue>,
 }
 impl azure_core::Continuable for ComputeOperationListResult {
@@ -1702,7 +1806,12 @@ impl DedicatedHostAllocatableVm {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedHostAvailableCapacity {
     #[doc = "The unutilized capacity of the dedicated host represented in terms of each VM size that is allowed to be deployed to the dedicated host."]
-    #[serde(rename = "allocatableVMs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allocatableVMs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allocatable_v_ms: Vec<DedicatedHostAllocatableVm>,
 }
 impl DedicatedHostAvailableCapacity {
@@ -1719,7 +1828,11 @@ pub struct DedicatedHostGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<DedicatedHostGroupProperties>,
     #[doc = "Availability Zone to use for this host group. Only single zone is supported. The zone can be assigned only during creation. If not provided, the group supports all zones in the region. If provided, enforces each host in the group to be in the same zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl DedicatedHostGroup {
@@ -1734,7 +1847,11 @@ impl DedicatedHostGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedHostGroupInstanceView {
     #[doc = "List of instance view of the dedicated hosts under the dedicated host group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosts: Vec<DedicatedHostInstanceViewWithName>,
 }
 impl DedicatedHostGroupInstanceView {
@@ -1769,7 +1886,11 @@ pub struct DedicatedHostGroupProperties {
     #[serde(rename = "platformFaultDomainCount")]
     pub platform_fault_domain_count: i32,
     #[doc = "A list of references to all dedicated hosts in the dedicated host group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosts: Vec<SubResourceReadOnly>,
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<DedicatedHostGroupInstanceView>,
@@ -1796,7 +1917,11 @@ pub struct DedicatedHostGroupUpdate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<DedicatedHostGroupProperties>,
     #[doc = "Availability Zone to use for this host group. Only single zone is supported. The zone can be assigned only during creation. If not provided, the group supports all zones in the region. If provided, enforces each host in the group to be in the same zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl DedicatedHostGroupUpdate {
@@ -1814,7 +1939,11 @@ pub struct DedicatedHostInstanceView {
     #[serde(rename = "availableCapacity", default, skip_serializing_if = "Option::is_none")]
     pub available_capacity: Option<DedicatedHostAvailableCapacity>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl DedicatedHostInstanceView {
@@ -1878,7 +2007,12 @@ pub struct DedicatedHostProperties {
     #[serde(rename = "hostId", default, skip_serializing_if = "Option::is_none")]
     pub host_id: Option<String>,
     #[doc = "A list of references to all virtual machines in the Dedicated Host."]
-    #[serde(rename = "virtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines: Vec<SubResourceReadOnly>,
     #[doc = "Specifies the software license type that will be applied to the VMs deployed on the dedicated host. <br><br> Possible values are: <br><br> **None** <br><br> **Windows_Server_Hybrid** <br><br> **Windows_Server_Perpetual** <br><br> Default: **None**"]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -2090,7 +2224,12 @@ impl DiffDiskSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Disallowed {
     #[doc = "A list of disk types."]
-    #[serde(rename = "diskTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_types: Vec<String>,
 }
 impl Disallowed {
@@ -2159,13 +2298,22 @@ pub struct Disk {
     #[serde(rename = "managedBy", default, skip_serializing_if = "Option::is_none")]
     pub managed_by: Option<String>,
     #[doc = "List of relative URIs containing the IDs of the VMs that have the disk attached. maxShares should be set to a value greater than one for disks to allow attaching them to multiple VMs."]
-    #[serde(rename = "managedByExtended", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedByExtended",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_by_extended: Vec<String>,
     #[doc = "The disks sku name. Can be Standard_LRS, Premium_LRS, StandardSSD_LRS, UltraSSD_LRS, Premium_ZRS, or StandardSSD_ZRS."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<DiskSku>,
     #[doc = "The Logical zone list for Disk."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The complex type of the extended location."]
     #[serde(rename = "extendedLocation", default, skip_serializing_if = "Option::is_none")]
@@ -2230,7 +2378,12 @@ impl DiskAccessList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskAccessProperties {
     #[doc = "A readonly collection of private endpoint connections created on the disk. Currently only one endpoint connection is supported."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The disk access resource provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2425,10 +2578,19 @@ pub struct DiskInstanceView {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Specifies the encryption settings for the OS Disk. <br><br> Minimum api-version: 2015-06-15"]
-    #[serde(rename = "encryptionSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "encryptionSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub encryption_settings: Vec<DiskEncryptionSettings>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl DiskInstanceView {
@@ -2514,7 +2676,12 @@ pub struct DiskProperties {
     #[serde(rename = "maxShares", default, skip_serializing_if = "Option::is_none")]
     pub max_shares: Option<i32>,
     #[doc = "Details of the list of all VMs that have the disk attached. maxShares should be set to a value greater than one for disks to allow attaching them to multiple VMs."]
-    #[serde(rename = "shareInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_info: Vec<ShareInfoElement>,
     #[doc = "Policy for accessing the disk via network."]
     #[serde(rename = "networkAccessPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -3092,7 +3259,12 @@ pub struct EncryptionImages {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<OsDiskImageEncryption>,
     #[doc = "A list of encryption specifications for data disk images."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<DataDiskImageEncryption>,
 }
 impl EncryptionImages {
@@ -3167,7 +3339,12 @@ pub struct EncryptionSetProperties {
     #[serde(rename = "activeKey", default, skip_serializing_if = "Option::is_none")]
     pub active_key: Option<KeyForDiskEncryptionSet>,
     #[doc = "A readonly collection of key vault keys previously used by this disk encryption set while a key rotation is in progress. It will be empty if there is no ongoing key rotation."]
-    #[serde(rename = "previousKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "previousKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub previous_keys: Vec<KeyForDiskEncryptionSet>,
     #[doc = "The disk encryption set provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3193,7 +3370,12 @@ pub struct EncryptionSettingsCollection {
     #[doc = "Set this flag to true and provide DiskEncryptionKey and optional KeyEncryptionKey to enable encryption. Set this flag to false and remove DiskEncryptionKey and KeyEncryptionKey to disable encryption. If EncryptionSettings is null in the request object, the existing settings remain unchanged."]
     pub enabled: bool,
     #[doc = "A collection of encryption settings, one for each disk volume."]
-    #[serde(rename = "encryptionSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "encryptionSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub encryption_settings: Vec<EncryptionSettingsElement>,
     #[doc = "Describes what type of encryption is used for the disks. Once this field is set, it cannot be overwritten. '1.0' corresponds to Azure Disk Encryption with AAD app.'1.1' corresponds to Azure Disk Encryption."]
     #[serde(rename = "encryptionSettingsVersion", default, skip_serializing_if = "Option::is_none")]
@@ -3557,7 +3739,12 @@ impl GalleryApplicationVersionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GalleryArtifactPublishingProfileBase {
     #[doc = "The target regions where the Image Version is going to be replicated to. This property is updatable."]
-    #[serde(rename = "targetRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_regions: Vec<TargetRegion>,
     #[doc = "The number of replicas of the Image Version to be created per region. This property would take effect for a region when regionalReplicaCount is not specified. This property is updatable."]
     #[serde(rename = "replicaCount", default, skip_serializing_if = "Option::is_none")]
@@ -3578,7 +3765,12 @@ pub struct GalleryArtifactPublishingProfileBase {
     #[serde(rename = "replicationMode", default, skip_serializing_if = "Option::is_none")]
     pub replication_mode: Option<gallery_artifact_publishing_profile_base::ReplicationMode>,
     #[doc = "The target extended locations where the Image Version is going to be replicated to. This property is updatable."]
-    #[serde(rename = "targetExtendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetExtendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_extended_locations: Vec<GalleryTargetExtendedLocation>,
 }
 impl GalleryArtifactPublishingProfileBase {
@@ -3911,7 +4103,11 @@ pub struct GalleryImageProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<gallery_image_properties::ProvisioningState>,
     #[doc = "A list of gallery image features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<GalleryImageFeature>,
     #[doc = "The architecture of the image. Applicable to OS disks only."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4153,7 +4349,12 @@ pub struct GalleryImageVersionStorageProfile {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<GalleryOsDiskImage>,
     #[doc = "A list of data disk images."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<GalleryDataDiskImage>,
 }
 impl GalleryImageVersionStorageProfile {
@@ -5197,7 +5398,12 @@ pub struct ImageStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<ImageOsDisk>,
     #[doc = "Specifies the parameters that are used to add a data disk to a virtual machine. <br><br> For more information about disks, see [About disks and VHDs for Azure virtual machines](https://docs.microsoft.com/azure/virtual-machines/managed-disks-overview)."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<ImageDataDisk>,
     #[doc = "Specifies whether an image is zone resilient or not. Default is false. Zone resilient images can be created only in regions that provide Zone Redundant Storage (ZRS)."]
     #[serde(rename = "zoneResilient", default, skip_serializing_if = "Option::is_none")]
@@ -5288,7 +5494,12 @@ pub mod instance_view_status {
 #[doc = "Instance view statuses."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstanceViewStatusesSummary {
-    #[serde(rename = "statusesSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusesSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses_summary: Vec<StatusCodeCount>,
 }
 impl InstanceViewStatusesSummary {
@@ -5485,13 +5696,28 @@ impl LinuxConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinuxParameters {
     #[doc = "The update classifications to select when installing patches for Linux."]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
     #[doc = "packages to include in the patch operation. Format: packageName_packageVersion"]
-    #[serde(rename = "packageNameMasksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_include: Vec<String>,
     #[doc = "packages to exclude in the patch operation. Format: packageName_packageVersion"]
-    #[serde(rename = "packageNameMasksToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_exclude: Vec<String>,
     #[doc = "This is used as a maintenance run identifier for Auto VM Guest Patching in Linux."]
     #[serde(rename = "maintenanceRunId", default, skip_serializing_if = "Option::is_none")]
@@ -5924,13 +6150,23 @@ pub mod network_interface_reference_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfile {
     #[doc = "Specifies the list of resource Ids for the network interfaces associated with the virtual machine."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterfaceReference>,
     #[doc = "specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations"]
     #[serde(rename = "networkApiVersion", default, skip_serializing_if = "Option::is_none")]
     pub network_api_version: Option<network_profile::NetworkApiVersion>,
     #[doc = "Specifies the networking configurations that will be used to create the virtual machine networking resources."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineNetworkInterfaceConfiguration>,
 }
 impl NetworkProfile {
@@ -6190,7 +6426,11 @@ pub struct OsFamilyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "List of OS versions belonging to this family."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub versions: Vec<OsVersionPropertiesBase>,
 }
 impl OsFamilyProperties {
@@ -6220,7 +6460,11 @@ pub struct OsProfile {
     #[serde(rename = "linuxConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub linux_configuration: Option<LinuxConfiguration>,
     #[doc = "Specifies set of certificates that should be installed onto the virtual machine. To install certificates on a virtual machine it is recommended to use the [Azure Key Vault virtual machine extension for Linux](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-linux) or the [Azure Key Vault virtual machine extension for Windows](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-windows)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<VaultSecretGroup>,
     #[doc = "Specifies whether extension operations should be allowed on the virtual machine. <br><br>This may only be set to False when no extensions are present on the virtual machine."]
     #[serde(rename = "allowExtensionOperations", default, skip_serializing_if = "Option::is_none")]
@@ -6557,7 +6801,11 @@ pub struct PatchInstallationDetail {
     #[serde(rename = "kbId", default, skip_serializing_if = "Option::is_none")]
     pub kb_id: Option<String>,
     #[doc = "The classification(s) of the patch as provided by the patch publisher."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications: Vec<String>,
     #[doc = "The state of the patch after the installation operation completed."]
     #[serde(rename = "installationState", default, skip_serializing_if = "Option::is_none")]
@@ -6822,7 +7070,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The uri to fetch the next page of snapshots. Call ListNext() with this to fetch the next page of snapshots."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6966,7 +7218,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -6981,10 +7237,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -7066,13 +7332,28 @@ pub struct ProximityPlacementGroupProperties {
     #[serde(rename = "proximityPlacementGroupType", default, skip_serializing_if = "Option::is_none")]
     pub proximity_placement_group_type: Option<proximity_placement_group_properties::ProximityPlacementGroupType>,
     #[doc = "A list of references to all virtual machines in the proximity placement group."]
-    #[serde(rename = "virtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines: Vec<SubResourceWithColocationStatus>,
     #[doc = "A list of references to all virtual machine scale sets in the proximity placement group."]
-    #[serde(rename = "virtualMachineScaleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachineScaleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machine_scale_sets: Vec<SubResourceWithColocationStatus>,
     #[doc = "A list of references to all availability sets in the proximity placement group."]
-    #[serde(rename = "availabilitySets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilitySets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_sets: Vec<SubResourceWithColocationStatus>,
     #[doc = "Instance view status."]
     #[serde(rename = "colocationStatus", default, skip_serializing_if = "Option::is_none")]
@@ -7434,7 +7715,11 @@ pub struct ReplicationStatus {
     #[serde(rename = "aggregatedState", default, skip_serializing_if = "Option::is_none")]
     pub aggregated_state: Option<replication_status::AggregatedState>,
     #[doc = "This is a summary of replication status for each region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub summary: Vec<RegionalReplicationStatus>,
 }
 impl ReplicationStatus {
@@ -7617,22 +7902,48 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<ResourceSkuCapacity>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "A list of locations and availability zones in those locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "The api versions that support this SKU."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Metadata for retrieving price info."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<ResourceSkuCosts>,
     #[doc = "A name value pair to describe the capability."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -7711,13 +8022,27 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "List of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ResourceSkuZoneDetails>,
     #[doc = "The names of extended locations."]
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<String>,
     #[doc = "The type of the extended location."]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
@@ -7770,10 +8095,18 @@ pub mod resource_sku_location_info {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuRestrictionInfo {
     #[doc = "Locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "List of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuRestrictionInfo {
@@ -7788,7 +8121,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Describes an available Compute SKU Restriction Information."]
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
@@ -7821,10 +8158,18 @@ pub mod resource_sku_restrictions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuZoneDetails {
     #[doc = "The set of zones that the SKU is available in with the specified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
     #[doc = "A list of capabilities that are available for the SKU in the specified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
 }
 impl ResourceSkuZoneDetails {
@@ -7907,7 +8252,11 @@ impl RestorePointCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointCollectionListResult {
     #[doc = "Gets the list of restore point collections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorePointCollection>,
     #[doc = "The uri to fetch the next page of RestorePointCollections. Call ListNext() with this to fetch the next page of RestorePointCollections"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7937,7 +8286,12 @@ pub struct RestorePointCollectionProperties {
     #[serde(rename = "restorePointCollectionId", default, skip_serializing_if = "Option::is_none")]
     pub restore_point_collection_id: Option<String>,
     #[doc = "A list containing all restore points created under this restore point collection."]
-    #[serde(rename = "restorePoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restorePoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_points: Vec<RestorePoint>,
 }
 impl RestorePointCollectionProperties {
@@ -7978,10 +8332,19 @@ impl RestorePointCollectionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointInstanceView {
     #[doc = "The disk restore points information."]
-    #[serde(rename = "diskRestorePoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskRestorePoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_restore_points: Vec<DiskRestorePointInstanceView>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl RestorePointInstanceView {
@@ -7993,7 +8356,12 @@ impl RestorePointInstanceView {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointProperties {
     #[doc = "List of disk resource ids that the customer wishes to exclude from the restore point. If no disks are specified, all disks will be included."]
-    #[serde(rename = "excludeDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludeDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude_disks: Vec<ApiEntityReference>,
     #[doc = "Describes the properties of the Virtual Machine for which the restore point was created. The properties provided are a subset and the snapshot of the overall Virtual Machine properties captured at the time of the restore point creation."]
     #[serde(rename = "sourceMetadata", default, skip_serializing_if = "Option::is_none")]
@@ -8198,7 +8566,12 @@ pub struct RestorePointSourceVmStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<RestorePointSourceVmosDisk>,
     #[doc = "Gets the data disks of the VM captured at the time of the restore point creation."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<RestorePointSourceVmDataDisk>,
 }
 impl RestorePointSourceVmStorageProfile {
@@ -8260,7 +8633,11 @@ pub struct RoleInstanceInstanceView {
     #[doc = "Specifies a unique identifier generated internally for the cloud service associated with this role instance. <br /><br /> NOTE: If you are using Azure Diagnostics extension, this property can be used as 'DeploymentId' for querying details."]
     #[serde(rename = "privateId", default, skip_serializing_if = "Option::is_none")]
     pub private_id: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceInstanceViewStatus>,
 }
 impl RoleInstanceInstanceView {
@@ -8289,7 +8666,12 @@ impl RoleInstanceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleInstanceNetworkProfile {
     #[doc = "Specifies the list of resource Ids for the network interfaces associated with the role instance."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<SubResource>,
 }
 impl RoleInstanceNetworkProfile {
@@ -8473,7 +8855,11 @@ pub struct RunCommandDocument {
     #[doc = "The script to be executed."]
     pub script: Vec<String>,
     #[doc = "The parameters used by the script."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<RunCommandParameterDefinition>,
 }
 impl RunCommandDocument {
@@ -8528,10 +8914,18 @@ pub struct RunCommandInput {
     #[serde(rename = "commandId")]
     pub command_id: String,
     #[doc = "Optional. The script to be executed.  When this value is given, the given script will override the default script of the command."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub script: Vec<String>,
     #[doc = "The run command parameters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<RunCommandInputParameter>,
 }
 impl RunCommandInput {
@@ -8604,7 +8998,11 @@ impl RunCommandParameterDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunCommandResult {
     #[doc = "Run command operation response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InstanceViewStatus>,
 }
 impl RunCommandResult {
@@ -8616,7 +9014,11 @@ impl RunCommandResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScaleInPolicy {
     #[doc = "The rules to be followed when scaling-in a virtual machine scale set. <br><br> Possible values are: <br><br> **Default** When a virtual machine scale set is scaled in, the scale set will first be balanced across zones if it is a zonal scale set. Then, it will be balanced across Fault Domains as far as possible. Within each Fault Domain, the virtual machines chosen for removal will be the newest ones that are not protected from scale-in. <br><br> **OldestVM** When a virtual machine scale set is being scaled-in, the oldest virtual machines that are not protected from scale-in will be chosen for removal. For zonal virtual machine scale sets, the scale set will first be balanced across zones. Within each zone, the oldest virtual machines that are not protected will be chosen for removal. <br><br> **NewestVM** When a virtual machine scale set is being scaled-in, the newest virtual machines that are not protected from scale-in will be chosen for removal. For zonal virtual machine scale sets, the scale set will first be balanced across zones. Within each zone, the newest virtual machines that are not protected will be chosen for removal. <br><br>"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<String>,
     #[doc = "This property allows you to specify if virtual machines chosen for removal have to be force deleted when a virtual machine scale set is being scaled-in.(Feature in Preview)"]
     #[serde(rename = "forceDeletion", default, skip_serializing_if = "Option::is_none")]
@@ -8788,7 +9190,11 @@ pub struct SharedGalleryImageProperties {
     #[serde(rename = "hyperVGeneration", default, skip_serializing_if = "Option::is_none")]
     pub hyper_v_generation: Option<shared_gallery_image_properties::HyperVGeneration>,
     #[doc = "A list of gallery image features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<GalleryImageFeature>,
     #[doc = "Describes the gallery image definition purchase plan. This is used by marketplace images."]
     #[serde(rename = "purchasePlan", default, skip_serializing_if = "Option::is_none")]
@@ -8941,7 +9347,11 @@ pub struct SharingProfile {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub permissions: Option<sharing_profile::Permissions>,
     #[doc = "A list of sharing profile groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<SharingProfileGroup>,
     #[doc = "Information of community gallery if current gallery is shared to community"]
     #[serde(rename = "communityGalleryInfo", default, skip_serializing_if = "Option::is_none")]
@@ -8999,7 +9409,11 @@ pub struct SharingProfileGroup {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<sharing_profile_group::Type>,
     #[doc = "A list of subscription/tenant ids the gallery is aimed to be shared to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ids: Vec<String>,
 }
 impl SharingProfileGroup {
@@ -9098,7 +9512,11 @@ pub struct SharingStatus {
     #[serde(rename = "aggregatedState", default, skip_serializing_if = "Option::is_none")]
     pub aggregated_state: Option<SharingState>,
     #[doc = "Summary of all regional sharing status."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub summary: Vec<RegionalSharingStatus>,
 }
 impl SharingStatus {
@@ -9113,7 +9531,11 @@ pub struct SharingUpdate {
     #[serde(rename = "operationType")]
     pub operation_type: sharing_update::OperationType,
     #[doc = "A list of sharing profile groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<SharingProfileGroup>,
 }
 impl SharingUpdate {
@@ -9544,7 +9966,12 @@ impl SpotRestorePolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SshConfiguration {
     #[doc = "The list of SSH public keys used to authenticate with linux based VMs."]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<SshPublicKey>,
 }
 impl SshConfiguration {
@@ -9726,7 +10153,12 @@ pub struct StorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
     #[doc = "Specifies the parameters that are used to add a data disk to a virtual machine. <br><br> For more information about disks, see [About disks and VHDs for Azure virtual machines](https://docs.microsoft.com/azure/virtual-machines/managed-disks-overview)."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
 }
 impl StorageProfile {
@@ -10325,7 +10757,12 @@ pub struct VaultSecretGroup {
     #[serde(rename = "sourceVault", default, skip_serializing_if = "Option::is_none")]
     pub source_vault: Option<SubResource>,
     #[doc = "The list of key vault references in SourceVault which contain certificates."]
-    #[serde(rename = "vaultCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_certificates: Vec<VaultCertificate>,
 }
 impl VaultSecretGroup {
@@ -10357,13 +10794,21 @@ pub struct VirtualMachine {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<VirtualMachineProperties>,
     #[doc = "The virtual machine child extension resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<VirtualMachineExtension>,
     #[doc = "Identity for the virtual machine."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<VirtualMachineIdentity>,
     #[doc = "The virtual machine zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The complex type of the extended location."]
     #[serde(rename = "extendedLocation", default, skip_serializing_if = "Option::is_none")]
@@ -10389,10 +10834,19 @@ pub struct VirtualMachineAgentInstanceView {
     #[serde(rename = "vmAgentVersion", default, skip_serializing_if = "Option::is_none")]
     pub vm_agent_version: Option<String>,
     #[doc = "The virtual machine extension handler instance view."]
-    #[serde(rename = "extensionHandlers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extensionHandlers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extension_handlers: Vec<VirtualMachineExtensionHandlerInstanceView>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachineAgentInstanceView {
@@ -10422,7 +10876,12 @@ pub struct VirtualMachineAssessPatchesResult {
     #[serde(rename = "startDateTime", default, with = "azure_core::date::rfc3339::option")]
     pub start_date_time: Option<time::OffsetDateTime>,
     #[doc = "The list of patches that have been detected as available for installation."]
-    #[serde(rename = "availablePatches", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availablePatches",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_patches: Vec<VirtualMachineSoftwarePatchProperties>,
     #[doc = "Api error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10516,7 +10975,11 @@ pub struct VirtualMachineCaptureResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<serde_json::Value>,
     #[doc = "a list of resource items of the captured virtual machine"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<serde_json::Value>,
 }
 impl VirtualMachineCaptureResult {
@@ -10619,10 +11082,18 @@ pub struct VirtualMachineExtensionInstanceView {
     #[serde(rename = "typeHandlerVersion", default, skip_serializing_if = "Option::is_none")]
     pub type_handler_version: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub substatuses: Vec<InstanceViewStatus>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachineExtensionInstanceView {
@@ -10732,7 +11203,11 @@ impl VirtualMachineExtensionUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineExtensionsListResult {
     #[doc = "The list of extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineExtension>,
 }
 impl VirtualMachineExtensionsListResult {
@@ -10826,7 +11301,12 @@ pub struct VirtualMachineImageProperties {
     #[doc = "Contains the os disk image information."]
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<OsDiskImage>,
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<DataDiskImage>,
     #[doc = "Describes automatic OS upgrade properties on the image."]
     #[serde(rename = "automaticOSUpgradeProperties", default, skip_serializing_if = "Option::is_none")]
@@ -10837,7 +11317,11 @@ pub struct VirtualMachineImageProperties {
     #[doc = "Specifies the disallowed configuration for a virtual machine image."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub disallowed: Option<DisallowedConfiguration>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<VirtualMachineImageFeature>,
     #[doc = "Specifies the Architecture Type"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10974,7 +11458,11 @@ pub struct VirtualMachineInstallPatchesResult {
     #[serde(rename = "failedPatchCount", default, skip_serializing_if = "Option::is_none")]
     pub failed_patch_count: Option<i32>,
     #[doc = "The patches that were installed during the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub patches: Vec<PatchInstallationDetail>,
     #[doc = "The UTC timestamp when the operation began."]
     #[serde(rename = "startDateTime", default, with = "azure_core::date::rfc3339::option")]
@@ -11110,10 +11598,18 @@ pub struct VirtualMachineInstanceView {
     #[serde(rename = "maintenanceRedeployStatus", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_redeploy_status: Option<MaintenanceRedeployStatus>,
     #[doc = "The virtual machine disk information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<DiskInstanceView>,
     #[doc = "The extensions information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineExtensionInstanceView>,
     #[doc = "The health status of the VM."]
     #[serde(rename = "vmHealth", default, skip_serializing_if = "Option::is_none")]
@@ -11125,7 +11621,11 @@ pub struct VirtualMachineInstanceView {
     #[serde(rename = "assignedHost", default, skip_serializing_if = "Option::is_none")]
     pub assigned_host: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "The status of virtual machine patch operations."]
     #[serde(rename = "patchStatus", default, skip_serializing_if = "Option::is_none")]
@@ -11313,7 +11813,12 @@ pub mod virtual_machine_network_interface_configuration_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineNetworkInterfaceDnsSettingsConfiguration {
     #[doc = "List of DNS servers IP addresses"]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl VirtualMachineNetworkInterfaceDnsSettingsConfiguration {
@@ -11350,13 +11855,28 @@ pub struct VirtualMachineNetworkInterfaceIpConfigurationProperties {
     #[serde(rename = "privateIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub private_ip_address_version: Option<virtual_machine_network_interface_ip_configuration_properties::PrivateIpAddressVersion>,
     #[doc = "Specifies an array of references to application security group."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<SubResource>,
     #[doc = "Specifies an array of references to backend address pools of application gateways. A virtual machine can reference backend address pools of multiple application gateways. Multiple virtual machines cannot use the same application gateway."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to backend address pools of load balancers. A virtual machine can reference backend address pools of one public and one internal load balancer. [Multiple virtual machines cannot use the same basic sku load balancer]."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<SubResource>,
 }
 impl VirtualMachineNetworkInterfaceIpConfigurationProperties {
@@ -11414,7 +11934,12 @@ pub struct VirtualMachinePatchStatus {
     #[serde(rename = "lastPatchInstallationSummary", default, skip_serializing_if = "Option::is_none")]
     pub last_patch_installation_summary: Option<LastPatchInstallationSummary>,
     #[doc = "The enablement status of the specified patchMode"]
-    #[serde(rename = "configurationStatuses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configurationStatuses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configuration_statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachinePatchStatus {
@@ -11537,7 +12062,12 @@ pub struct VirtualMachinePublicIpAddressConfigurationProperties {
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
     pub dns_settings: Option<VirtualMachinePublicIpAddressDnsSettingsConfiguration>,
     #[doc = "The list of IP tags associated with the public IP address."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<VirtualMachineIpTag>,
     #[serde(rename = "publicIPPrefix", default, skip_serializing_if = "Option::is_none")]
     pub public_ip_prefix: Option<SubResource>,
@@ -11733,7 +12263,11 @@ pub struct VirtualMachineRunCommandInstanceView {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachineRunCommandInstanceView {
@@ -11798,10 +12332,19 @@ pub struct VirtualMachineRunCommandProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub source: Option<VirtualMachineRunCommandScriptSource>,
     #[doc = "The parameters used by the script."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<RunCommandInputParameter>,
     #[doc = "The parameters used by the script."]
-    #[serde(rename = "protectedParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_parameters: Vec<RunCommandInputParameter>,
     #[doc = "Optional. If set to true, provisioning will complete as soon as the script starts and will not wait for script to complete."]
     #[serde(rename = "asyncExecution", default, skip_serializing_if = "Option::is_none")]
@@ -11903,7 +12446,11 @@ pub struct VirtualMachineScaleSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<VirtualMachineScaleSetIdentity>,
     #[doc = "The virtual machine scale set zones. NOTE: Availability zones can only be set when you create the scale set"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The complex type of the extended location."]
     #[serde(rename = "extendedLocation", default, skip_serializing_if = "Option::is_none")]
@@ -12011,7 +12558,11 @@ impl VirtualMachineScaleSetExtensionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetExtensionProfile {
     #[doc = "The virtual machine scale set child extension resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineScaleSetExtension>,
     #[doc = "Specifies the time alloted for all extensions to start. The time duration should be between 15 minutes and 120 minutes (inclusive) and should be specified in ISO 8601 format. The default value is 90 minutes (PT1H30M). <br><br> Minimum api-version: 2020-06-01"]
     #[serde(rename = "extensionsTimeBudget", default, skip_serializing_if = "Option::is_none")]
@@ -12053,7 +12604,12 @@ pub struct VirtualMachineScaleSetExtensionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "Collection of extension names after which this extension needs to be provisioned."]
-    #[serde(rename = "provisionAfterExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisionAfterExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provision_after_extensions: Vec<String>,
     #[doc = "Indicates whether failures stemming from the extension will be suppressed (Operational failures such as not connecting to the VM will not be suppressed regardless of this value). The default is false."]
     #[serde(rename = "suppressFailures", default, skip_serializing_if = "Option::is_none")]
@@ -12135,16 +12691,36 @@ pub struct VirtualMachineScaleSetIpConfigurationProperties {
     #[serde(rename = "privateIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub private_ip_address_version: Option<virtual_machine_scale_set_ip_configuration_properties::PrivateIpAddressVersion>,
     #[doc = "Specifies an array of references to backend address pools of application gateways. A scale set can reference backend address pools of multiple application gateways. Multiple scale sets cannot use the same application gateway."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to application security group."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<SubResource>,
     #[doc = "Specifies an array of references to backend address pools of load balancers. A scale set can reference backend address pools of one public and one internal load balancer. Multiple scale sets cannot use the same basic sku load balancer."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to inbound Nat pools of the load balancers. A scale set can reference inbound nat pools of one public and one internal load balancer. Multiple scale sets cannot use the same basic sku load balancer."]
-    #[serde(rename = "loadBalancerInboundNatPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerInboundNatPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_inbound_nat_pools: Vec<SubResource>,
 }
 impl VirtualMachineScaleSetIpConfigurationProperties {
@@ -12232,13 +12808,26 @@ pub struct VirtualMachineScaleSetInstanceView {
     #[serde(rename = "virtualMachine", default, skip_serializing_if = "Option::is_none")]
     pub virtual_machine: Option<VirtualMachineScaleSetInstanceViewStatusesSummary>,
     #[doc = "The extensions information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineScaleSetVmExtensionsSummary>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "The orchestration services information."]
-    #[serde(rename = "orchestrationServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orchestrationServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub orchestration_services: Vec<OrchestrationServiceSummary>,
 }
 impl VirtualMachineScaleSetInstanceView {
@@ -12250,7 +12839,12 @@ impl VirtualMachineScaleSetInstanceView {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetInstanceViewStatusesSummary {
     #[doc = "The extensions information."]
-    #[serde(rename = "statusesSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusesSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses_summary: Vec<VirtualMachineStatusCodeCount>,
 }
 impl VirtualMachineScaleSetInstanceViewStatusesSummary {
@@ -12395,7 +12989,12 @@ impl VirtualMachineScaleSetNetworkConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetNetworkConfigurationDnsSettings {
     #[doc = "List of DNS servers IP addresses"]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl VirtualMachineScaleSetNetworkConfigurationDnsSettings {
@@ -12491,7 +13090,12 @@ pub struct VirtualMachineScaleSetNetworkProfile {
     #[serde(rename = "healthProbe", default, skip_serializing_if = "Option::is_none")]
     pub health_probe: Option<ApiEntityReference>,
     #[doc = "The list of network configurations."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineScaleSetNetworkConfiguration>,
     #[doc = "specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations for Virtual Machine Scale Set with orchestration mode 'Flexible'"]
     #[serde(rename = "networkApiVersion", default, skip_serializing_if = "Option::is_none")]
@@ -12569,7 +13173,12 @@ pub struct VirtualMachineScaleSetOsDisk {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub image: Option<VirtualHardDisk>,
     #[doc = "Specifies the container urls that are used to store operating system disks for the scale set."]
-    #[serde(rename = "vhdContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vhdContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vhd_containers: Vec<String>,
     #[doc = "Describes the parameters of a ScaleSet managed disk."]
     #[serde(rename = "managedDisk", default, skip_serializing_if = "Option::is_none")]
@@ -12622,7 +13231,11 @@ pub struct VirtualMachineScaleSetOsProfile {
     #[serde(rename = "linuxConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub linux_configuration: Option<LinuxConfiguration>,
     #[doc = "Specifies set of certificates that should be installed onto the virtual machines in the scale set. To install certificates on a virtual machine it is recommended to use the [Azure Key Vault virtual machine extension for Linux](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-linux) or the [Azure Key Vault virtual machine extension for Windows](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-windows)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<VaultSecretGroup>,
     #[doc = "Specifies whether extension operations should be allowed on the virtual machine scale set. <br><br>This may only be set to False when no extensions are present on the virtual machine scale set."]
     #[serde(rename = "allowExtensionOperations", default, skip_serializing_if = "Option::is_none")]
@@ -12738,7 +13351,12 @@ pub struct VirtualMachineScaleSetPublicIpAddressConfigurationProperties {
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
     pub dns_settings: Option<VirtualMachineScaleSetPublicIpAddressConfigurationDnsSettings>,
     #[doc = "The list of IP tags associated with the public IP address."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<VirtualMachineScaleSetIpTag>,
     #[serde(rename = "publicIPPrefix", default, skip_serializing_if = "Option::is_none")]
     pub public_ip_prefix: Option<SubResource>,
@@ -12837,7 +13455,12 @@ pub struct VirtualMachineScaleSetReimageParameters {
     #[serde(flatten)]
     pub virtual_machine_scale_set_vm_reimage_parameters: VirtualMachineScaleSetVmReimageParameters,
     #[doc = "The virtual machine scale set instance ids. Omitting the virtual machine scale set instance ids will result in the operation being performed on all virtual machines in the virtual machine scale set."]
-    #[serde(rename = "instanceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "instanceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instance_ids: Vec<String>,
 }
 impl VirtualMachineScaleSetReimageParameters {
@@ -12903,7 +13526,12 @@ pub struct VirtualMachineScaleSetStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<VirtualMachineScaleSetOsDisk>,
     #[doc = "Specifies the parameters that are used to add data disks to the virtual machines in the scale set. <br><br> For more information about disks, see [About disks and VHDs for Azure virtual machines](https://docs.microsoft.com/azure/virtual-machines/managed-disks-overview)."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<VirtualMachineScaleSetDataDisk>,
 }
 impl VirtualMachineScaleSetStorageProfile {
@@ -12967,16 +13595,36 @@ pub struct VirtualMachineScaleSetUpdateIpConfigurationProperties {
     #[serde(rename = "privateIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub private_ip_address_version: Option<virtual_machine_scale_set_update_ip_configuration_properties::PrivateIpAddressVersion>,
     #[doc = "The application gateway backend address pools."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to application security group."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<SubResource>,
     #[doc = "The load balancer backend address pools."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<SubResource>,
     #[doc = "The load balancer inbound nat pools."]
-    #[serde(rename = "loadBalancerInboundNatPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerInboundNatPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_inbound_nat_pools: Vec<SubResource>,
 }
 impl VirtualMachineScaleSetUpdateIpConfigurationProperties {
@@ -13059,7 +13707,12 @@ pub struct VirtualMachineScaleSetUpdateNetworkConfigurationProperties {
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
     pub dns_settings: Option<VirtualMachineScaleSetNetworkConfigurationDnsSettings>,
     #[doc = "The virtual machine scale set IP Configuration."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<VirtualMachineScaleSetUpdateIpConfiguration>,
     #[doc = "Whether IP forwarding enabled on this NIC."]
     #[serde(rename = "enableIPForwarding", default, skip_serializing_if = "Option::is_none")]
@@ -13120,7 +13773,12 @@ pub struct VirtualMachineScaleSetUpdateNetworkProfile {
     #[serde(rename = "healthProbe", default, skip_serializing_if = "Option::is_none")]
     pub health_probe: Option<ApiEntityReference>,
     #[doc = "The list of network configurations."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineScaleSetUpdateNetworkConfiguration>,
     #[doc = "specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations for Virtual Machine Scale Set with orchestration mode 'Flexible'"]
     #[serde(rename = "networkApiVersion", default, skip_serializing_if = "Option::is_none")]
@@ -13186,7 +13844,12 @@ pub struct VirtualMachineScaleSetUpdateOsDisk {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub image: Option<VirtualHardDisk>,
     #[doc = "The list of virtual hard disk container uris."]
-    #[serde(rename = "vhdContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vhdContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vhd_containers: Vec<String>,
     #[doc = "Describes the parameters of a ScaleSet managed disk."]
     #[serde(rename = "managedDisk", default, skip_serializing_if = "Option::is_none")]
@@ -13210,7 +13873,11 @@ pub struct VirtualMachineScaleSetUpdateOsProfile {
     #[serde(rename = "linuxConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub linux_configuration: Option<LinuxConfiguration>,
     #[doc = "The List of certificates for addition to the VM."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<VaultSecretGroup>,
 }
 impl VirtualMachineScaleSetUpdateOsProfile {
@@ -13342,7 +14009,12 @@ pub struct VirtualMachineScaleSetUpdateStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<VirtualMachineScaleSetUpdateOsDisk>,
     #[doc = "The data disks."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<VirtualMachineScaleSetDataDisk>,
 }
 impl VirtualMachineScaleSetUpdateStorageProfile {
@@ -13406,10 +14078,18 @@ pub struct VirtualMachineScaleSetVm {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub plan: Option<Plan>,
     #[doc = "The virtual machine child extension resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<VirtualMachineExtension>,
     #[doc = "The virtual machine zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl VirtualMachineScaleSetVm {
@@ -13469,7 +14149,11 @@ impl VirtualMachineScaleSetVmExtensionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetVmExtensionsListResult {
     #[doc = "The list of VMSS VM extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineScaleSetVmExtension>,
 }
 impl VirtualMachineScaleSetVmExtensionsListResult {
@@ -13484,7 +14168,12 @@ pub struct VirtualMachineScaleSetVmExtensionsSummary {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The extensions information."]
-    #[serde(rename = "statusesSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusesSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses_summary: Vec<VirtualMachineStatusCodeCount>,
 }
 impl VirtualMachineScaleSetVmExtensionsSummary {
@@ -13496,7 +14185,12 @@ impl VirtualMachineScaleSetVmExtensionsSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetVmInstanceIDs {
     #[doc = "The virtual machine scale set instance ids. Omitting the virtual machine scale set instance ids will result in the operation being performed on all virtual machines in the virtual machine scale set."]
-    #[serde(rename = "instanceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "instanceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instance_ids: Vec<String>,
 }
 impl VirtualMachineScaleSetVmInstanceIDs {
@@ -13535,10 +14229,18 @@ pub struct VirtualMachineScaleSetVmInstanceView {
     #[serde(rename = "maintenanceRedeployStatus", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_redeploy_status: Option<MaintenanceRedeployStatus>,
     #[doc = "The disks information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<DiskInstanceView>,
     #[doc = "The extensions information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineExtensionInstanceView>,
     #[doc = "The health status of the VM."]
     #[serde(rename = "vmHealth", default, skip_serializing_if = "Option::is_none")]
@@ -13547,7 +14249,11 @@ pub struct VirtualMachineScaleSetVmInstanceView {
     #[serde(rename = "bootDiagnostics", default, skip_serializing_if = "Option::is_none")]
     pub boot_diagnostics: Option<BootDiagnosticsInstanceView>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "Resource id of the dedicated host, on which the virtual machine is allocated through automatic placement, when the virtual machine is associated with a dedicated host group that has automatic placement enabled. <br><br>Minimum api-version: 2020-06-01."]
     #[serde(rename = "assignedHost", default, skip_serializing_if = "Option::is_none")]
@@ -13585,7 +14291,12 @@ impl VirtualMachineScaleSetVmListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetVmNetworkProfileConfiguration {
     #[doc = "The list of network configurations."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineScaleSetNetworkConfiguration>,
 }
 impl VirtualMachineScaleSetVmNetworkProfileConfiguration {
@@ -13762,7 +14473,11 @@ impl VirtualMachineSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineSizeListResult {
     #[doc = "The list of virtual machine sizes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineSize>,
 }
 impl azure_core::Continuable for VirtualMachineSizeListResult {
@@ -13792,7 +14507,11 @@ pub struct VirtualMachineSoftwarePatchProperties {
     #[serde(rename = "kbId", default, skip_serializing_if = "Option::is_none")]
     pub kb_id: Option<String>,
     #[doc = "The classification(s) of the patch as provided by the patch publisher."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications: Vec<String>,
     #[doc = "Describes the reboot requirements of the patch."]
     #[serde(rename = "rebootBehavior", default, skip_serializing_if = "Option::is_none")]
@@ -13926,7 +14645,11 @@ pub struct VirtualMachineUpdate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<VirtualMachineIdentity>,
     #[doc = "The virtual machine zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl VirtualMachineUpdate {
@@ -13938,7 +14661,11 @@ impl VirtualMachineUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WinRmConfiguration {
     #[doc = "The list of Windows Remote Management listeners"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub listeners: Vec<WinRmListener>,
 }
 impl WinRmConfiguration {
@@ -13983,7 +14710,12 @@ pub struct WindowsConfiguration {
     #[serde(rename = "timeZone", default, skip_serializing_if = "Option::is_none")]
     pub time_zone: Option<String>,
     #[doc = "Specifies additional base-64 encoded XML formatted information that can be included in the Unattend.xml file, which is used by Windows Setup."]
-    #[serde(rename = "additionalUnattendContent", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalUnattendContent",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_unattend_content: Vec<AdditionalUnattendContent>,
     #[doc = "Specifies settings related to VM Guest Patching on Windows."]
     #[serde(rename = "patchSettings", default, skip_serializing_if = "Option::is_none")]
@@ -14001,13 +14733,28 @@ impl WindowsConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WindowsParameters {
     #[doc = "The update classifications to select when installing patches for Windows."]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
     #[doc = "Kbs to include in the patch operation"]
-    #[serde(rename = "kbNumbersToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_include: Vec<String>,
     #[doc = "Kbs to exclude in the patch operation"]
-    #[serde(rename = "kbNumbersToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_exclude: Vec<String>,
     #[doc = "Filters out Kbs that don't have an InstallationRebootBehavior of 'NeverReboots' when this is set to true."]
     #[serde(rename = "excludeKbsRequiringReboot", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/compute/src/package_2022_01_03/models.rs b/services/mgmt/compute/src/package_2022_01_03/models.rs
index bad9c36106..72e20e822f 100644
--- a/services/mgmt/compute/src/package_2022_01_03/models.rs
+++ b/services/mgmt/compute/src/package_2022_01_03/models.rs
@@ -90,7 +90,11 @@ impl ApiEntityReference {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiError {
     #[doc = "The Api error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ApiErrorBase>,
     #[doc = "Inner error details."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -132,7 +136,12 @@ impl ApiErrorBase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationProfile {
     #[doc = "Specifies the gallery applications that should be made available to the VM/VMSS"]
-    #[serde(rename = "galleryApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "galleryApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gallery_applications: Vec<VmGalleryApplication>,
 }
 impl ApplicationProfile {
@@ -359,12 +368,21 @@ pub struct AvailabilitySetProperties {
     #[serde(rename = "platformFaultDomainCount", default, skip_serializing_if = "Option::is_none")]
     pub platform_fault_domain_count: Option<i32>,
     #[doc = "A list of references to all virtual machines in the availability set."]
-    #[serde(rename = "virtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines: Vec<SubResource>,
     #[serde(rename = "proximityPlacementGroup", default, skip_serializing_if = "Option::is_none")]
     pub proximity_placement_group: Option<SubResource>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl AvailabilitySetProperties {
@@ -568,7 +586,11 @@ pub struct CapacityReservation {
     #[doc = "Describes a virtual machine scale set sku. NOTE: If the new VM SKU is not supported on the hardware the scale set is currently on, you need to deallocate the VMs in the scale set before you modify the SKU name."]
     pub sku: Sku,
     #[doc = "Availability Zone to use for this capacity reservation. The zone has to be single value and also should be part for the list of zones specified during the capacity reservation group creation. The zone can be assigned only during creation. If not provided, the reservation supports only non-zonal deployments. If provided, enforces VM/VMSS using this capacity reservation to be in same zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl CapacityReservation {
@@ -590,7 +612,11 @@ pub struct CapacityReservationGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<CapacityReservationGroupProperties>,
     #[doc = "Availability Zones to use for this capacity reservation group. The zones can be assigned only during creation. If not provided, the group supports only regional resources in the region. If provided, enforces each capacity reservation in the group to be in one of the zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl CapacityReservationGroup {
@@ -605,7 +631,12 @@ impl CapacityReservationGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityReservationGroupInstanceView {
     #[doc = "List of instance view of the capacity reservations under the capacity reservation group."]
-    #[serde(rename = "capacityReservations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "capacityReservations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capacity_reservations: Vec<CapacityReservationInstanceViewWithName>,
 }
 impl CapacityReservationGroupInstanceView {
@@ -637,10 +668,20 @@ impl CapacityReservationGroupListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityReservationGroupProperties {
     #[doc = "A list of all capacity reservation resource ids that belong to capacity reservation group."]
-    #[serde(rename = "capacityReservations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "capacityReservations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capacity_reservations: Vec<SubResourceReadOnly>,
     #[doc = "A list of references to all virtual machines associated to the capacity reservation group."]
-    #[serde(rename = "virtualMachinesAssociated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachinesAssociated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines_associated: Vec<SubResourceReadOnly>,
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<CapacityReservationGroupInstanceView>,
@@ -671,7 +712,11 @@ pub struct CapacityReservationInstanceView {
     #[serde(rename = "utilizationInfo", default, skip_serializing_if = "Option::is_none")]
     pub utilization_info: Option<CapacityReservationUtilization>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl CapacityReservationInstanceView {
@@ -731,7 +776,12 @@ pub struct CapacityReservationProperties {
     #[serde(rename = "reservationId", default, skip_serializing_if = "Option::is_none")]
     pub reservation_id: Option<String>,
     #[doc = "A list of all virtual machine resource ids that are associated with the capacity reservation."]
-    #[serde(rename = "virtualMachinesAssociated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachinesAssociated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines_associated: Vec<SubResourceReadOnly>,
     #[doc = "The date time when the capacity reservation was last updated."]
     #[serde(rename = "provisioningTime", default, with = "azure_core::date::rfc3339::option")]
@@ -772,7 +822,12 @@ impl CapacityReservationUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityReservationUtilization {
     #[doc = "A list of all virtual machines resource ids allocated against the capacity reservation."]
-    #[serde(rename = "virtualMachinesAllocated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachinesAllocated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines_allocated: Vec<SubResourceReadOnly>,
 }
 impl CapacityReservationUtilization {
@@ -835,7 +890,11 @@ impl CloudService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceExtensionProfile {
     #[doc = "List of extensions for the cloud service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<Extension>,
 }
 impl CloudServiceExtensionProfile {
@@ -873,7 +932,12 @@ pub struct CloudServiceExtensionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "Optional list of roles to apply this extension. If property is not specified or '*' is specified, extension is applied to all roles in the cloud service."]
-    #[serde(rename = "rolesAppliedTo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rolesAppliedTo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles_applied_to: Vec<String>,
 }
 impl CloudServiceExtensionProperties {
@@ -891,9 +955,18 @@ pub struct CloudServiceInstanceView {
     #[serde(rename = "sdkVersion", default, skip_serializing_if = "Option::is_none")]
     pub sdk_version: Option<String>,
     #[doc = "Specifies a list of unique identifiers generated internally for the cloud service. <br /><br /> NOTE: If you are using Azure Diagnostics extension, this property can be used as 'DeploymentId' for querying details."]
-    #[serde(rename = "privateIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ids: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceInstanceViewStatus>,
 }
 impl CloudServiceInstanceView {
@@ -922,7 +995,12 @@ impl CloudServiceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceNetworkProfile {
     #[doc = "List of Load balancer configurations. Cloud service can have up to two load balancer configurations, corresponding to a Public Load Balancer and an Internal Load Balancer."]
-    #[serde(rename = "loadBalancerConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_configurations: Vec<LoadBalancerConfiguration>,
     #[serde(rename = "swappableCloudService", default, skip_serializing_if = "Option::is_none")]
     pub swappable_cloud_service: Option<SubResource>,
@@ -936,7 +1014,11 @@ impl CloudServiceNetworkProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceOsProfile {
     #[doc = "Specifies set of certificates that should be installed onto the role instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<CloudServiceVaultSecretGroup>,
 }
 impl CloudServiceOsProfile {
@@ -1037,7 +1119,11 @@ impl CloudServiceRoleListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceRoleProfile {
     #[doc = "List of roles for the cloud service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<CloudServiceRoleProfileProperties>,
 }
 impl CloudServiceRoleProfile {
@@ -1170,7 +1256,12 @@ pub struct CloudServiceVaultSecretGroup {
     #[serde(rename = "sourceVault", default, skip_serializing_if = "Option::is_none")]
     pub source_vault: Option<SubResource>,
     #[doc = "The list of key vault references in SourceVault which contain certificates."]
-    #[serde(rename = "vaultCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_certificates: Vec<CloudServiceVaultCertificate>,
 }
 impl CloudServiceVaultSecretGroup {
@@ -1259,7 +1350,11 @@ pub struct CommunityGalleryImageProperties {
     #[serde(rename = "hyperVGeneration", default, skip_serializing_if = "Option::is_none")]
     pub hyper_v_generation: Option<community_gallery_image_properties::HyperVGeneration>,
     #[doc = "A list of gallery image features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<GalleryImageFeature>,
     #[doc = "Describes the gallery image definition purchase plan. This is used by marketplace images."]
     #[serde(rename = "purchasePlan", default, skip_serializing_if = "Option::is_none")]
@@ -1422,7 +1517,12 @@ pub struct CommunityGalleryInfo {
     #[serde(rename = "communityGalleryEnabled", default, skip_serializing_if = "Option::is_none")]
     pub community_gallery_enabled: Option<bool>,
     #[doc = "Community gallery public name list."]
-    #[serde(rename = "publicNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_names: Vec<String>,
 }
 impl CommunityGalleryInfo {
@@ -1434,7 +1534,11 @@ impl CommunityGalleryInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeOperationListResult {
     #[doc = "The list of compute operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputeOperationValue>,
 }
 impl azure_core::Continuable for ComputeOperationListResult {
@@ -1801,7 +1905,12 @@ impl DedicatedHostAllocatableVm {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedHostAvailableCapacity {
     #[doc = "The unutilized capacity of the dedicated host represented in terms of each VM size that is allowed to be deployed to the dedicated host."]
-    #[serde(rename = "allocatableVMs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allocatableVMs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allocatable_v_ms: Vec<DedicatedHostAllocatableVm>,
 }
 impl DedicatedHostAvailableCapacity {
@@ -1818,7 +1927,11 @@ pub struct DedicatedHostGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<DedicatedHostGroupProperties>,
     #[doc = "Availability Zone to use for this host group. Only single zone is supported. The zone can be assigned only during creation. If not provided, the group supports all zones in the region. If provided, enforces each host in the group to be in the same zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl DedicatedHostGroup {
@@ -1833,7 +1946,11 @@ impl DedicatedHostGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedHostGroupInstanceView {
     #[doc = "List of instance view of the dedicated hosts under the dedicated host group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosts: Vec<DedicatedHostInstanceViewWithName>,
 }
 impl DedicatedHostGroupInstanceView {
@@ -1868,7 +1985,11 @@ pub struct DedicatedHostGroupProperties {
     #[serde(rename = "platformFaultDomainCount")]
     pub platform_fault_domain_count: i32,
     #[doc = "A list of references to all dedicated hosts in the dedicated host group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosts: Vec<SubResourceReadOnly>,
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<DedicatedHostGroupInstanceView>,
@@ -1914,7 +2035,11 @@ pub struct DedicatedHostGroupUpdate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<DedicatedHostGroupProperties>,
     #[doc = "Availability Zone to use for this host group. Only single zone is supported. The zone can be assigned only during creation. If not provided, the group supports all zones in the region. If provided, enforces each host in the group to be in the same zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl DedicatedHostGroupUpdate {
@@ -1932,7 +2057,11 @@ pub struct DedicatedHostInstanceView {
     #[serde(rename = "availableCapacity", default, skip_serializing_if = "Option::is_none")]
     pub available_capacity: Option<DedicatedHostAvailableCapacity>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl DedicatedHostInstanceView {
@@ -1996,7 +2125,12 @@ pub struct DedicatedHostProperties {
     #[serde(rename = "hostId", default, skip_serializing_if = "Option::is_none")]
     pub host_id: Option<String>,
     #[doc = "A list of references to all virtual machines in the Dedicated Host."]
-    #[serde(rename = "virtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines: Vec<SubResourceReadOnly>,
     #[doc = "Specifies the software license type that will be applied to the VMs deployed on the dedicated host. <br><br> Possible values are: <br><br> **None** <br><br> **Windows_Server_Hybrid** <br><br> **Windows_Server_Perpetual** <br><br> Default: **None**"]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -2208,7 +2342,12 @@ impl DiffDiskSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Disallowed {
     #[doc = "A list of disk types."]
-    #[serde(rename = "diskTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_types: Vec<String>,
 }
 impl Disallowed {
@@ -2277,13 +2416,22 @@ pub struct Disk {
     #[serde(rename = "managedBy", default, skip_serializing_if = "Option::is_none")]
     pub managed_by: Option<String>,
     #[doc = "List of relative URIs containing the IDs of the VMs that have the disk attached. maxShares should be set to a value greater than one for disks to allow attaching them to multiple VMs."]
-    #[serde(rename = "managedByExtended", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedByExtended",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_by_extended: Vec<String>,
     #[doc = "The disks sku name. Can be Standard_LRS, Premium_LRS, StandardSSD_LRS, UltraSSD_LRS, Premium_ZRS, or StandardSSD_ZRS."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<DiskSku>,
     #[doc = "The Logical zone list for Disk."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The complex type of the extended location."]
     #[serde(rename = "extendedLocation", default, skip_serializing_if = "Option::is_none")]
@@ -2348,7 +2496,12 @@ impl DiskAccessList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskAccessProperties {
     #[doc = "A readonly collection of private endpoint connections created on the disk. Currently only one endpoint connection is supported."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The disk access resource provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2543,10 +2696,19 @@ pub struct DiskInstanceView {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Specifies the encryption settings for the OS Disk. <br><br> Minimum api-version: 2015-06-15"]
-    #[serde(rename = "encryptionSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "encryptionSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub encryption_settings: Vec<DiskEncryptionSettings>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl DiskInstanceView {
@@ -2632,7 +2794,12 @@ pub struct DiskProperties {
     #[serde(rename = "maxShares", default, skip_serializing_if = "Option::is_none")]
     pub max_shares: Option<i32>,
     #[doc = "Details of the list of all VMs that have the disk attached. maxShares should be set to a value greater than one for disks to allow attaching them to multiple VMs."]
-    #[serde(rename = "shareInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_info: Vec<ShareInfoElement>,
     #[doc = "Policy for accessing the disk via network."]
     #[serde(rename = "networkAccessPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -3213,7 +3380,12 @@ pub struct EncryptionImages {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<OsDiskImageEncryption>,
     #[doc = "A list of encryption specifications for data disk images."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<DataDiskImageEncryption>,
 }
 impl EncryptionImages {
@@ -3288,7 +3460,12 @@ pub struct EncryptionSetProperties {
     #[serde(rename = "activeKey", default, skip_serializing_if = "Option::is_none")]
     pub active_key: Option<KeyForDiskEncryptionSet>,
     #[doc = "A readonly collection of key vault keys previously used by this disk encryption set while a key rotation is in progress. It will be empty if there is no ongoing key rotation."]
-    #[serde(rename = "previousKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "previousKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub previous_keys: Vec<KeyForDiskEncryptionSet>,
     #[doc = "The disk encryption set provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3314,7 +3491,12 @@ pub struct EncryptionSettingsCollection {
     #[doc = "Set this flag to true and provide DiskEncryptionKey and optional KeyEncryptionKey to enable encryption. Set this flag to false and remove DiskEncryptionKey and KeyEncryptionKey to disable encryption. If EncryptionSettings is null in the request object, the existing settings remain unchanged."]
     pub enabled: bool,
     #[doc = "A collection of encryption settings, one for each disk volume."]
-    #[serde(rename = "encryptionSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "encryptionSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub encryption_settings: Vec<EncryptionSettingsElement>,
     #[doc = "Describes what type of encryption is used for the disks. Once this field is set, it cannot be overwritten. '1.0' corresponds to Azure Disk Encryption with AAD app.'1.1' corresponds to Azure Disk Encryption."]
     #[serde(rename = "encryptionSettingsVersion", default, skip_serializing_if = "Option::is_none")]
@@ -3673,7 +3855,12 @@ impl GalleryApplicationVersionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GalleryArtifactPublishingProfileBase {
     #[doc = "The target regions where the Image Version is going to be replicated to. This property is updatable."]
-    #[serde(rename = "targetRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_regions: Vec<TargetRegion>,
     #[doc = "The number of replicas of the Image Version to be created per region. This property would take effect for a region when regionalReplicaCount is not specified. This property is updatable."]
     #[serde(rename = "replicaCount", default, skip_serializing_if = "Option::is_none")]
@@ -3694,7 +3881,12 @@ pub struct GalleryArtifactPublishingProfileBase {
     #[serde(rename = "replicationMode", default, skip_serializing_if = "Option::is_none")]
     pub replication_mode: Option<gallery_artifact_publishing_profile_base::ReplicationMode>,
     #[doc = "The target extended locations where the Image Version is going to be replicated to. This property is updatable."]
-    #[serde(rename = "targetExtendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetExtendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_extended_locations: Vec<GalleryTargetExtendedLocation>,
 }
 impl GalleryArtifactPublishingProfileBase {
@@ -4027,7 +4219,11 @@ pub struct GalleryImageProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<GalleryProvisioningState>,
     #[doc = "A list of gallery image features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<GalleryImageFeature>,
     #[doc = "The architecture of the image. Applicable to OS disks only."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4208,7 +4404,12 @@ pub struct GalleryImageVersionStorageProfile {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<GalleryOsDiskImage>,
     #[doc = "A list of data disk images."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<GalleryDataDiskImage>,
 }
 impl GalleryImageVersionStorageProfile {
@@ -5284,7 +5485,12 @@ pub struct ImageStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<ImageOsDisk>,
     #[doc = "Specifies the parameters that are used to add a data disk to a virtual machine. <br><br> For more information about disks, see [About disks and VHDs for Azure virtual machines](https://docs.microsoft.com/azure/virtual-machines/managed-disks-overview)."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<ImageDataDisk>,
     #[doc = "Specifies whether an image is zone resilient or not. Default is false. Zone resilient images can be created only in regions that provide Zone Redundant Storage (ZRS)."]
     #[serde(rename = "zoneResilient", default, skip_serializing_if = "Option::is_none")]
@@ -5375,7 +5581,12 @@ pub mod instance_view_status {
 #[doc = "Instance view statuses."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstanceViewStatusesSummary {
-    #[serde(rename = "statusesSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusesSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses_summary: Vec<StatusCodeCount>,
 }
 impl InstanceViewStatusesSummary {
@@ -5572,13 +5783,28 @@ impl LinuxConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinuxParameters {
     #[doc = "The update classifications to select when installing patches for Linux."]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
     #[doc = "packages to include in the patch operation. Format: packageName_packageVersion"]
-    #[serde(rename = "packageNameMasksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_include: Vec<String>,
     #[doc = "packages to exclude in the patch operation. Format: packageName_packageVersion"]
-    #[serde(rename = "packageNameMasksToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_exclude: Vec<String>,
     #[doc = "This is used as a maintenance run identifier for Auto VM Guest Patching in Linux."]
     #[serde(rename = "maintenanceRunId", default, skip_serializing_if = "Option::is_none")]
@@ -6070,13 +6296,23 @@ pub mod network_interface_reference_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfile {
     #[doc = "Specifies the list of resource Ids for the network interfaces associated with the virtual machine."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterfaceReference>,
     #[doc = "specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations"]
     #[serde(rename = "networkApiVersion", default, skip_serializing_if = "Option::is_none")]
     pub network_api_version: Option<network_profile::NetworkApiVersion>,
     #[doc = "Specifies the networking configurations that will be used to create the virtual machine networking resources."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineNetworkInterfaceConfiguration>,
 }
 impl NetworkProfile {
@@ -6336,7 +6572,11 @@ pub struct OsFamilyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "List of OS versions belonging to this family."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub versions: Vec<OsVersionPropertiesBase>,
 }
 impl OsFamilyProperties {
@@ -6366,7 +6606,11 @@ pub struct OsProfile {
     #[serde(rename = "linuxConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub linux_configuration: Option<LinuxConfiguration>,
     #[doc = "Specifies set of certificates that should be installed onto the virtual machine. To install certificates on a virtual machine it is recommended to use the [Azure Key Vault virtual machine extension for Linux](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-linux) or the [Azure Key Vault virtual machine extension for Windows](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-windows)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<VaultSecretGroup>,
     #[doc = "Specifies whether extension operations should be allowed on the virtual machine. <br><br>This may only be set to False when no extensions are present on the virtual machine."]
     #[serde(rename = "allowExtensionOperations", default, skip_serializing_if = "Option::is_none")]
@@ -6703,7 +6947,11 @@ pub struct PatchInstallationDetail {
     #[serde(rename = "kbId", default, skip_serializing_if = "Option::is_none")]
     pub kb_id: Option<String>,
     #[doc = "The classification(s) of the patch as provided by the patch publisher."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications: Vec<String>,
     #[doc = "The state of the patch after the installation operation completed."]
     #[serde(rename = "installationState", default, skip_serializing_if = "Option::is_none")]
@@ -6971,7 +7219,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The uri to fetch the next page of snapshots. Call ListNext() with this to fetch the next page of snapshots."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7115,7 +7367,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -7130,10 +7386,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -7180,7 +7446,11 @@ pub struct ProximityPlacementGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<ProximityPlacementGroupProperties>,
     #[doc = "Specifies the Availability Zone where virtual machine, virtual machine scale set or availability set associated with the  proximity placement group can be created."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ProximityPlacementGroup {
@@ -7219,13 +7489,28 @@ pub struct ProximityPlacementGroupProperties {
     #[serde(rename = "proximityPlacementGroupType", default, skip_serializing_if = "Option::is_none")]
     pub proximity_placement_group_type: Option<proximity_placement_group_properties::ProximityPlacementGroupType>,
     #[doc = "A list of references to all virtual machines in the proximity placement group."]
-    #[serde(rename = "virtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines: Vec<SubResourceWithColocationStatus>,
     #[doc = "A list of references to all virtual machine scale sets in the proximity placement group."]
-    #[serde(rename = "virtualMachineScaleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachineScaleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machine_scale_sets: Vec<SubResourceWithColocationStatus>,
     #[doc = "A list of references to all availability sets in the proximity placement group."]
-    #[serde(rename = "availabilitySets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilitySets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_sets: Vec<SubResourceWithColocationStatus>,
     #[doc = "Instance view status."]
     #[serde(rename = "colocationStatus", default, skip_serializing_if = "Option::is_none")]
@@ -7282,7 +7567,12 @@ pub mod proximity_placement_group_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Intent {
         #[doc = "Specifies possible sizes of virtual machines that can be created in the proximity placement group."]
-        #[serde(rename = "vmSizes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "vmSizes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub vm_sizes: Vec<String>,
     }
     impl Intent {
@@ -7602,7 +7892,11 @@ pub struct ReplicationStatus {
     #[serde(rename = "aggregatedState", default, skip_serializing_if = "Option::is_none")]
     pub aggregated_state: Option<replication_status::AggregatedState>,
     #[doc = "This is a summary of replication status for each region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub summary: Vec<RegionalReplicationStatus>,
 }
 impl ReplicationStatus {
@@ -7785,22 +8079,48 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<ResourceSkuCapacity>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "A list of locations and availability zones in those locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "The api versions that support this SKU."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Metadata for retrieving price info."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<ResourceSkuCosts>,
     #[doc = "A name value pair to describe the capability."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -7879,13 +8199,27 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "List of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ResourceSkuZoneDetails>,
     #[doc = "The names of extended locations."]
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<String>,
     #[doc = "The type of the extended location."]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
@@ -7938,10 +8272,18 @@ pub mod resource_sku_location_info {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuRestrictionInfo {
     #[doc = "Locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "List of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuRestrictionInfo {
@@ -7956,7 +8298,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Describes an available Compute SKU Restriction Information."]
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
@@ -7989,10 +8335,18 @@ pub mod resource_sku_restrictions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuZoneDetails {
     #[doc = "The set of zones that the SKU is available in with the specified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
     #[doc = "A list of capabilities that are available for the SKU in the specified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
 }
 impl ResourceSkuZoneDetails {
@@ -8099,7 +8453,11 @@ impl RestorePointCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointCollectionListResult {
     #[doc = "Gets the list of restore point collections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorePointCollection>,
     #[doc = "The uri to fetch the next page of RestorePointCollections. Call ListNext() with this to fetch the next page of RestorePointCollections"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8129,7 +8487,12 @@ pub struct RestorePointCollectionProperties {
     #[serde(rename = "restorePointCollectionId", default, skip_serializing_if = "Option::is_none")]
     pub restore_point_collection_id: Option<String>,
     #[doc = "A list containing all restore points created under this restore point collection."]
-    #[serde(rename = "restorePoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restorePoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_points: Vec<RestorePoint>,
 }
 impl RestorePointCollectionProperties {
@@ -8170,10 +8533,19 @@ impl RestorePointCollectionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointInstanceView {
     #[doc = "The disk restore points information."]
-    #[serde(rename = "diskRestorePoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskRestorePoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_restore_points: Vec<DiskRestorePointInstanceView>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl RestorePointInstanceView {
@@ -8185,7 +8557,12 @@ impl RestorePointInstanceView {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointProperties {
     #[doc = "List of disk resource ids that the customer wishes to exclude from the restore point. If no disks are specified, all disks will be included."]
-    #[serde(rename = "excludeDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludeDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude_disks: Vec<ApiEntityReference>,
     #[doc = "Describes the properties of the Virtual Machine for which the restore point was created. The properties provided are a subset and the snapshot of the overall Virtual Machine properties captured at the time of the restore point creation."]
     #[serde(rename = "sourceMetadata", default, skip_serializing_if = "Option::is_none")]
@@ -8390,7 +8767,12 @@ pub struct RestorePointSourceVmStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<RestorePointSourceVmosDisk>,
     #[doc = "Gets the data disks of the VM captured at the time of the restore point creation."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<RestorePointSourceVmDataDisk>,
 }
 impl RestorePointSourceVmStorageProfile {
@@ -8452,7 +8834,11 @@ pub struct RoleInstanceInstanceView {
     #[doc = "Specifies a unique identifier generated internally for the cloud service associated with this role instance. <br /><br /> NOTE: If you are using Azure Diagnostics extension, this property can be used as 'DeploymentId' for querying details."]
     #[serde(rename = "privateId", default, skip_serializing_if = "Option::is_none")]
     pub private_id: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceInstanceViewStatus>,
 }
 impl RoleInstanceInstanceView {
@@ -8481,7 +8867,12 @@ impl RoleInstanceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleInstanceNetworkProfile {
     #[doc = "Specifies the list of resource Ids for the network interfaces associated with the role instance."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<SubResource>,
 }
 impl RoleInstanceNetworkProfile {
@@ -8665,7 +9056,11 @@ pub struct RunCommandDocument {
     #[doc = "The script to be executed."]
     pub script: Vec<String>,
     #[doc = "The parameters used by the script."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<RunCommandParameterDefinition>,
 }
 impl RunCommandDocument {
@@ -8720,10 +9115,18 @@ pub struct RunCommandInput {
     #[serde(rename = "commandId")]
     pub command_id: String,
     #[doc = "Optional. The script to be executed.  When this value is given, the given script will override the default script of the command."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub script: Vec<String>,
     #[doc = "The run command parameters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<RunCommandInputParameter>,
 }
 impl RunCommandInput {
@@ -8796,7 +9199,11 @@ impl RunCommandParameterDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunCommandResult {
     #[doc = "Run command operation response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InstanceViewStatus>,
 }
 impl RunCommandResult {
@@ -8808,7 +9215,11 @@ impl RunCommandResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScaleInPolicy {
     #[doc = "The rules to be followed when scaling-in a virtual machine scale set. <br><br> Possible values are: <br><br> **Default** When a virtual machine scale set is scaled in, the scale set will first be balanced across zones if it is a zonal scale set. Then, it will be balanced across Fault Domains as far as possible. Within each Fault Domain, the virtual machines chosen for removal will be the newest ones that are not protected from scale-in. <br><br> **OldestVM** When a virtual machine scale set is being scaled-in, the oldest virtual machines that are not protected from scale-in will be chosen for removal. For zonal virtual machine scale sets, the scale set will first be balanced across zones. Within each zone, the oldest virtual machines that are not protected will be chosen for removal. <br><br> **NewestVM** When a virtual machine scale set is being scaled-in, the newest virtual machines that are not protected from scale-in will be chosen for removal. For zonal virtual machine scale sets, the scale set will first be balanced across zones. Within each zone, the newest virtual machines that are not protected will be chosen for removal. <br><br>"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<String>,
     #[doc = "This property allows you to specify if virtual machines chosen for removal have to be force deleted when a virtual machine scale set is being scaled-in.(Feature in Preview)"]
     #[serde(rename = "forceDeletion", default, skip_serializing_if = "Option::is_none")]
@@ -9053,7 +9464,11 @@ pub struct SharedGalleryImageProperties {
     #[serde(rename = "hyperVGeneration", default, skip_serializing_if = "Option::is_none")]
     pub hyper_v_generation: Option<shared_gallery_image_properties::HyperVGeneration>,
     #[doc = "A list of gallery image features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<GalleryImageFeature>,
     #[doc = "Describes the gallery image definition purchase plan. This is used by marketplace images."]
     #[serde(rename = "purchasePlan", default, skip_serializing_if = "Option::is_none")]
@@ -9196,7 +9611,12 @@ pub struct SharedGalleryImageVersionStorageProfile {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<SharedGalleryOsDiskImage>,
     #[doc = "A list of data disk images."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<SharedGalleryDataDiskImage>,
 }
 impl SharedGalleryImageVersionStorageProfile {
@@ -9242,7 +9662,11 @@ pub struct SharingProfile {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub permissions: Option<sharing_profile::Permissions>,
     #[doc = "A list of sharing profile groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<SharingProfileGroup>,
     #[doc = "Information of community gallery if current gallery is shared to community"]
     #[serde(rename = "communityGalleryInfo", default, skip_serializing_if = "Option::is_none")]
@@ -9302,7 +9726,11 @@ pub struct SharingProfileGroup {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<sharing_profile_group::Type>,
     #[doc = "A list of subscription/tenant ids the gallery is aimed to be shared to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ids: Vec<String>,
 }
 impl SharingProfileGroup {
@@ -9399,7 +9827,11 @@ pub struct SharingStatus {
     #[serde(rename = "aggregatedState", default, skip_serializing_if = "Option::is_none")]
     pub aggregated_state: Option<SharingState>,
     #[doc = "Summary of all regional sharing status."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub summary: Vec<RegionalSharingStatus>,
 }
 impl SharingStatus {
@@ -9414,7 +9846,11 @@ pub struct SharingUpdate {
     #[serde(rename = "operationType")]
     pub operation_type: sharing_update::OperationType,
     #[doc = "A list of sharing profile groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<SharingProfileGroup>,
 }
 impl SharingUpdate {
@@ -9845,7 +10281,12 @@ impl SpotRestorePolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SshConfiguration {
     #[doc = "The list of SSH public keys used to authenticate with linux based VMs."]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<SshPublicKey>,
 }
 impl SshConfiguration {
@@ -10030,7 +10471,12 @@ pub struct StorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
     #[doc = "Specifies the parameters that are used to add a data disk to a virtual machine. <br><br> For more information about disks, see [About disks and VHDs for Azure virtual machines](https://docs.microsoft.com/azure/virtual-machines/managed-disks-overview)."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
 }
 impl StorageProfile {
@@ -10660,7 +11106,12 @@ pub struct VaultSecretGroup {
     #[serde(rename = "sourceVault", default, skip_serializing_if = "Option::is_none")]
     pub source_vault: Option<SubResource>,
     #[doc = "The list of key vault references in SourceVault which contain certificates."]
-    #[serde(rename = "vaultCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_certificates: Vec<VaultCertificate>,
 }
 impl VaultSecretGroup {
@@ -10692,13 +11143,21 @@ pub struct VirtualMachine {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<VirtualMachineProperties>,
     #[doc = "The virtual machine child extension resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<VirtualMachineExtension>,
     #[doc = "Identity for the virtual machine."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<VirtualMachineIdentity>,
     #[doc = "The virtual machine zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The complex type of the extended location."]
     #[serde(rename = "extendedLocation", default, skip_serializing_if = "Option::is_none")]
@@ -10724,10 +11183,19 @@ pub struct VirtualMachineAgentInstanceView {
     #[serde(rename = "vmAgentVersion", default, skip_serializing_if = "Option::is_none")]
     pub vm_agent_version: Option<String>,
     #[doc = "The virtual machine extension handler instance view."]
-    #[serde(rename = "extensionHandlers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extensionHandlers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extension_handlers: Vec<VirtualMachineExtensionHandlerInstanceView>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachineAgentInstanceView {
@@ -10757,7 +11225,12 @@ pub struct VirtualMachineAssessPatchesResult {
     #[serde(rename = "startDateTime", default, with = "azure_core::date::rfc3339::option")]
     pub start_date_time: Option<time::OffsetDateTime>,
     #[doc = "The list of patches that have been detected as available for installation."]
-    #[serde(rename = "availablePatches", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availablePatches",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_patches: Vec<VirtualMachineSoftwarePatchProperties>,
     #[doc = "Api error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10851,7 +11324,11 @@ pub struct VirtualMachineCaptureResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<serde_json::Value>,
     #[doc = "a list of resource items of the captured virtual machine"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<serde_json::Value>,
 }
 impl VirtualMachineCaptureResult {
@@ -10951,10 +11428,18 @@ pub struct VirtualMachineExtensionInstanceView {
     #[serde(rename = "typeHandlerVersion", default, skip_serializing_if = "Option::is_none")]
     pub type_handler_version: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub substatuses: Vec<InstanceViewStatus>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachineExtensionInstanceView {
@@ -11064,7 +11549,11 @@ impl VirtualMachineExtensionUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineExtensionsListResult {
     #[doc = "The list of extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineExtension>,
 }
 impl VirtualMachineExtensionsListResult {
@@ -11158,7 +11647,12 @@ pub struct VirtualMachineImageProperties {
     #[doc = "Contains the os disk image information."]
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<OsDiskImage>,
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<DataDiskImage>,
     #[doc = "Describes automatic OS upgrade properties on the image."]
     #[serde(rename = "automaticOSUpgradeProperties", default, skip_serializing_if = "Option::is_none")]
@@ -11169,7 +11663,11 @@ pub struct VirtualMachineImageProperties {
     #[doc = "Specifies the disallowed configuration for a virtual machine image."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub disallowed: Option<DisallowedConfiguration>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<VirtualMachineImageFeature>,
     #[doc = "Specifies the Architecture Type"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11306,7 +11804,11 @@ pub struct VirtualMachineInstallPatchesResult {
     #[serde(rename = "failedPatchCount", default, skip_serializing_if = "Option::is_none")]
     pub failed_patch_count: Option<i32>,
     #[doc = "The patches that were installed during the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub patches: Vec<PatchInstallationDetail>,
     #[doc = "The UTC timestamp when the operation began."]
     #[serde(rename = "startDateTime", default, with = "azure_core::date::rfc3339::option")]
@@ -11442,10 +11944,18 @@ pub struct VirtualMachineInstanceView {
     #[serde(rename = "maintenanceRedeployStatus", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_redeploy_status: Option<MaintenanceRedeployStatus>,
     #[doc = "The virtual machine disk information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<DiskInstanceView>,
     #[doc = "The extensions information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineExtensionInstanceView>,
     #[doc = "The health status of the VM."]
     #[serde(rename = "vmHealth", default, skip_serializing_if = "Option::is_none")]
@@ -11457,7 +11967,11 @@ pub struct VirtualMachineInstanceView {
     #[serde(rename = "assignedHost", default, skip_serializing_if = "Option::is_none")]
     pub assigned_host: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "The status of virtual machine patch operations."]
     #[serde(rename = "patchStatus", default, skip_serializing_if = "Option::is_none")]
@@ -11645,7 +12159,12 @@ pub mod virtual_machine_network_interface_configuration_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineNetworkInterfaceDnsSettingsConfiguration {
     #[doc = "List of DNS servers IP addresses"]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl VirtualMachineNetworkInterfaceDnsSettingsConfiguration {
@@ -11682,13 +12201,28 @@ pub struct VirtualMachineNetworkInterfaceIpConfigurationProperties {
     #[serde(rename = "privateIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub private_ip_address_version: Option<virtual_machine_network_interface_ip_configuration_properties::PrivateIpAddressVersion>,
     #[doc = "Specifies an array of references to application security group."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<SubResource>,
     #[doc = "Specifies an array of references to backend address pools of application gateways. A virtual machine can reference backend address pools of multiple application gateways. Multiple virtual machines cannot use the same application gateway."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to backend address pools of load balancers. A virtual machine can reference backend address pools of one public and one internal load balancer. [Multiple virtual machines cannot use the same basic sku load balancer]."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<SubResource>,
 }
 impl VirtualMachineNetworkInterfaceIpConfigurationProperties {
@@ -11746,7 +12280,12 @@ pub struct VirtualMachinePatchStatus {
     #[serde(rename = "lastPatchInstallationSummary", default, skip_serializing_if = "Option::is_none")]
     pub last_patch_installation_summary: Option<LastPatchInstallationSummary>,
     #[doc = "The enablement status of the specified patchMode"]
-    #[serde(rename = "configurationStatuses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configurationStatuses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configuration_statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachinePatchStatus {
@@ -11869,7 +12408,12 @@ pub struct VirtualMachinePublicIpAddressConfigurationProperties {
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
     pub dns_settings: Option<VirtualMachinePublicIpAddressDnsSettingsConfiguration>,
     #[doc = "The list of IP tags associated with the public IP address."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<VirtualMachineIpTag>,
     #[serde(rename = "publicIPPrefix", default, skip_serializing_if = "Option::is_none")]
     pub public_ip_prefix: Option<SubResource>,
@@ -12065,7 +12609,11 @@ pub struct VirtualMachineRunCommandInstanceView {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachineRunCommandInstanceView {
@@ -12130,10 +12678,19 @@ pub struct VirtualMachineRunCommandProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub source: Option<VirtualMachineRunCommandScriptSource>,
     #[doc = "The parameters used by the script."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<RunCommandInputParameter>,
     #[doc = "The parameters used by the script."]
-    #[serde(rename = "protectedParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_parameters: Vec<RunCommandInputParameter>,
     #[doc = "Optional. If set to true, provisioning will complete as soon as the script starts and will not wait for script to complete."]
     #[serde(rename = "asyncExecution", default, skip_serializing_if = "Option::is_none")]
@@ -12235,7 +12792,11 @@ pub struct VirtualMachineScaleSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<VirtualMachineScaleSetIdentity>,
     #[doc = "The virtual machine scale set zones. NOTE: Availability zones can only be set when you create the scale set"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The complex type of the extended location."]
     #[serde(rename = "extendedLocation", default, skip_serializing_if = "Option::is_none")]
@@ -12347,7 +12908,11 @@ impl VirtualMachineScaleSetExtensionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetExtensionProfile {
     #[doc = "The virtual machine scale set child extension resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineScaleSetExtension>,
     #[doc = "Specifies the time alloted for all extensions to start. The time duration should be between 15 minutes and 120 minutes (inclusive) and should be specified in ISO 8601 format. The default value is 90 minutes (PT1H30M). <br><br> Minimum api-version: 2020-06-01"]
     #[serde(rename = "extensionsTimeBudget", default, skip_serializing_if = "Option::is_none")]
@@ -12389,7 +12954,12 @@ pub struct VirtualMachineScaleSetExtensionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "Collection of extension names after which this extension needs to be provisioned."]
-    #[serde(rename = "provisionAfterExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisionAfterExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provision_after_extensions: Vec<String>,
     #[doc = "Indicates whether failures stemming from the extension will be suppressed (Operational failures such as not connecting to the VM will not be suppressed regardless of this value). The default is false."]
     #[serde(rename = "suppressFailures", default, skip_serializing_if = "Option::is_none")]
@@ -12471,16 +13041,36 @@ pub struct VirtualMachineScaleSetIpConfigurationProperties {
     #[serde(rename = "privateIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub private_ip_address_version: Option<virtual_machine_scale_set_ip_configuration_properties::PrivateIpAddressVersion>,
     #[doc = "Specifies an array of references to backend address pools of application gateways. A scale set can reference backend address pools of multiple application gateways. Multiple scale sets cannot use the same application gateway."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to application security group."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<SubResource>,
     #[doc = "Specifies an array of references to backend address pools of load balancers. A scale set can reference backend address pools of one public and one internal load balancer. Multiple scale sets cannot use the same basic sku load balancer."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to inbound Nat pools of the load balancers. A scale set can reference inbound nat pools of one public and one internal load balancer. Multiple scale sets cannot use the same basic sku load balancer."]
-    #[serde(rename = "loadBalancerInboundNatPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerInboundNatPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_inbound_nat_pools: Vec<SubResource>,
 }
 impl VirtualMachineScaleSetIpConfigurationProperties {
@@ -12568,13 +13158,26 @@ pub struct VirtualMachineScaleSetInstanceView {
     #[serde(rename = "virtualMachine", default, skip_serializing_if = "Option::is_none")]
     pub virtual_machine: Option<VirtualMachineScaleSetInstanceViewStatusesSummary>,
     #[doc = "The extensions information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineScaleSetVmExtensionsSummary>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "The orchestration services information."]
-    #[serde(rename = "orchestrationServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orchestrationServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub orchestration_services: Vec<OrchestrationServiceSummary>,
 }
 impl VirtualMachineScaleSetInstanceView {
@@ -12586,7 +13189,12 @@ impl VirtualMachineScaleSetInstanceView {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetInstanceViewStatusesSummary {
     #[doc = "The extensions information."]
-    #[serde(rename = "statusesSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusesSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses_summary: Vec<VirtualMachineStatusCodeCount>,
 }
 impl VirtualMachineScaleSetInstanceViewStatusesSummary {
@@ -12731,7 +13339,12 @@ impl VirtualMachineScaleSetNetworkConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetNetworkConfigurationDnsSettings {
     #[doc = "List of DNS servers IP addresses"]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl VirtualMachineScaleSetNetworkConfigurationDnsSettings {
@@ -12827,7 +13440,12 @@ pub struct VirtualMachineScaleSetNetworkProfile {
     #[serde(rename = "healthProbe", default, skip_serializing_if = "Option::is_none")]
     pub health_probe: Option<ApiEntityReference>,
     #[doc = "The list of network configurations."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineScaleSetNetworkConfiguration>,
     #[doc = "specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations for Virtual Machine Scale Set with orchestration mode 'Flexible'"]
     #[serde(rename = "networkApiVersion", default, skip_serializing_if = "Option::is_none")]
@@ -12905,7 +13523,12 @@ pub struct VirtualMachineScaleSetOsDisk {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub image: Option<VirtualHardDisk>,
     #[doc = "Specifies the container urls that are used to store operating system disks for the scale set."]
-    #[serde(rename = "vhdContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vhdContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vhd_containers: Vec<String>,
     #[doc = "Describes the parameters of a ScaleSet managed disk."]
     #[serde(rename = "managedDisk", default, skip_serializing_if = "Option::is_none")]
@@ -12962,7 +13585,11 @@ pub struct VirtualMachineScaleSetOsProfile {
     #[serde(rename = "linuxConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub linux_configuration: Option<LinuxConfiguration>,
     #[doc = "Specifies set of certificates that should be installed onto the virtual machines in the scale set. To install certificates on a virtual machine it is recommended to use the [Azure Key Vault virtual machine extension for Linux](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-linux) or the [Azure Key Vault virtual machine extension for Windows](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-windows)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<VaultSecretGroup>,
     #[doc = "Specifies whether extension operations should be allowed on the virtual machine scale set. <br><br>This may only be set to False when no extensions are present on the virtual machine scale set."]
     #[serde(rename = "allowExtensionOperations", default, skip_serializing_if = "Option::is_none")]
@@ -13078,7 +13705,12 @@ pub struct VirtualMachineScaleSetPublicIpAddressConfigurationProperties {
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
     pub dns_settings: Option<VirtualMachineScaleSetPublicIpAddressConfigurationDnsSettings>,
     #[doc = "The list of IP tags associated with the public IP address."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<VirtualMachineScaleSetIpTag>,
     #[serde(rename = "publicIPPrefix", default, skip_serializing_if = "Option::is_none")]
     pub public_ip_prefix: Option<SubResource>,
@@ -13177,7 +13809,12 @@ pub struct VirtualMachineScaleSetReimageParameters {
     #[serde(flatten)]
     pub virtual_machine_scale_set_vm_reimage_parameters: VirtualMachineScaleSetVmReimageParameters,
     #[doc = "The virtual machine scale set instance ids. Omitting the virtual machine scale set instance ids will result in the operation being performed on all virtual machines in the virtual machine scale set."]
-    #[serde(rename = "instanceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "instanceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instance_ids: Vec<String>,
 }
 impl VirtualMachineScaleSetReimageParameters {
@@ -13243,7 +13880,12 @@ pub struct VirtualMachineScaleSetStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<VirtualMachineScaleSetOsDisk>,
     #[doc = "Specifies the parameters that are used to add data disks to the virtual machines in the scale set. <br><br> For more information about disks, see [About disks and VHDs for Azure virtual machines](https://docs.microsoft.com/azure/virtual-machines/managed-disks-overview)."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<VirtualMachineScaleSetDataDisk>,
 }
 impl VirtualMachineScaleSetStorageProfile {
@@ -13307,16 +13949,36 @@ pub struct VirtualMachineScaleSetUpdateIpConfigurationProperties {
     #[serde(rename = "privateIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub private_ip_address_version: Option<virtual_machine_scale_set_update_ip_configuration_properties::PrivateIpAddressVersion>,
     #[doc = "The application gateway backend address pools."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to application security group."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<SubResource>,
     #[doc = "The load balancer backend address pools."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<SubResource>,
     #[doc = "The load balancer inbound nat pools."]
-    #[serde(rename = "loadBalancerInboundNatPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerInboundNatPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_inbound_nat_pools: Vec<SubResource>,
 }
 impl VirtualMachineScaleSetUpdateIpConfigurationProperties {
@@ -13399,7 +14061,12 @@ pub struct VirtualMachineScaleSetUpdateNetworkConfigurationProperties {
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
     pub dns_settings: Option<VirtualMachineScaleSetNetworkConfigurationDnsSettings>,
     #[doc = "The virtual machine scale set IP Configuration."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<VirtualMachineScaleSetUpdateIpConfiguration>,
     #[doc = "Whether IP forwarding enabled on this NIC."]
     #[serde(rename = "enableIPForwarding", default, skip_serializing_if = "Option::is_none")]
@@ -13460,7 +14127,12 @@ pub struct VirtualMachineScaleSetUpdateNetworkProfile {
     #[serde(rename = "healthProbe", default, skip_serializing_if = "Option::is_none")]
     pub health_probe: Option<ApiEntityReference>,
     #[doc = "The list of network configurations."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineScaleSetUpdateNetworkConfiguration>,
     #[doc = "specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations for Virtual Machine Scale Set with orchestration mode 'Flexible'"]
     #[serde(rename = "networkApiVersion", default, skip_serializing_if = "Option::is_none")]
@@ -13526,7 +14198,12 @@ pub struct VirtualMachineScaleSetUpdateOsDisk {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub image: Option<VirtualHardDisk>,
     #[doc = "The list of virtual hard disk container uris."]
-    #[serde(rename = "vhdContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vhdContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vhd_containers: Vec<String>,
     #[doc = "Describes the parameters of a ScaleSet managed disk."]
     #[serde(rename = "managedDisk", default, skip_serializing_if = "Option::is_none")]
@@ -13553,7 +14230,11 @@ pub struct VirtualMachineScaleSetUpdateOsProfile {
     #[serde(rename = "linuxConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub linux_configuration: Option<LinuxConfiguration>,
     #[doc = "The List of certificates for addition to the VM."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<VaultSecretGroup>,
 }
 impl VirtualMachineScaleSetUpdateOsProfile {
@@ -13685,7 +14366,12 @@ pub struct VirtualMachineScaleSetUpdateStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<VirtualMachineScaleSetUpdateOsDisk>,
     #[doc = "The data disks."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<VirtualMachineScaleSetDataDisk>,
 }
 impl VirtualMachineScaleSetUpdateStorageProfile {
@@ -13749,10 +14435,18 @@ pub struct VirtualMachineScaleSetVm {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub plan: Option<Plan>,
     #[doc = "The virtual machine child extension resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<VirtualMachineExtension>,
     #[doc = "The virtual machine zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Identity for the virtual machine."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -13816,7 +14510,11 @@ impl VirtualMachineScaleSetVmExtensionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetVmExtensionsListResult {
     #[doc = "The list of VMSS VM extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineScaleSetVmExtension>,
 }
 impl VirtualMachineScaleSetVmExtensionsListResult {
@@ -13831,7 +14529,12 @@ pub struct VirtualMachineScaleSetVmExtensionsSummary {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The extensions information."]
-    #[serde(rename = "statusesSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusesSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses_summary: Vec<VirtualMachineStatusCodeCount>,
 }
 impl VirtualMachineScaleSetVmExtensionsSummary {
@@ -13843,7 +14546,12 @@ impl VirtualMachineScaleSetVmExtensionsSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetVmInstanceIDs {
     #[doc = "The virtual machine scale set instance ids. Omitting the virtual machine scale set instance ids will result in the operation being performed on all virtual machines in the virtual machine scale set."]
-    #[serde(rename = "instanceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "instanceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instance_ids: Vec<String>,
 }
 impl VirtualMachineScaleSetVmInstanceIDs {
@@ -13882,10 +14590,18 @@ pub struct VirtualMachineScaleSetVmInstanceView {
     #[serde(rename = "maintenanceRedeployStatus", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_redeploy_status: Option<MaintenanceRedeployStatus>,
     #[doc = "The disks information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<DiskInstanceView>,
     #[doc = "The extensions information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineExtensionInstanceView>,
     #[doc = "The health status of the VM."]
     #[serde(rename = "vmHealth", default, skip_serializing_if = "Option::is_none")]
@@ -13894,7 +14610,11 @@ pub struct VirtualMachineScaleSetVmInstanceView {
     #[serde(rename = "bootDiagnostics", default, skip_serializing_if = "Option::is_none")]
     pub boot_diagnostics: Option<BootDiagnosticsInstanceView>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "Resource id of the dedicated host, on which the virtual machine is allocated through automatic placement, when the virtual machine is associated with a dedicated host group that has automatic placement enabled. <br><br>Minimum api-version: 2020-06-01."]
     #[serde(rename = "assignedHost", default, skip_serializing_if = "Option::is_none")]
@@ -13932,7 +14652,12 @@ impl VirtualMachineScaleSetVmListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetVmNetworkProfileConfiguration {
     #[doc = "The list of network configurations."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineScaleSetNetworkConfiguration>,
 }
 impl VirtualMachineScaleSetVmNetworkProfileConfiguration {
@@ -14109,7 +14834,11 @@ impl VirtualMachineSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineSizeListResult {
     #[doc = "The list of virtual machine sizes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineSize>,
 }
 impl azure_core::Continuable for VirtualMachineSizeListResult {
@@ -14139,7 +14868,11 @@ pub struct VirtualMachineSoftwarePatchProperties {
     #[serde(rename = "kbId", default, skip_serializing_if = "Option::is_none")]
     pub kb_id: Option<String>,
     #[doc = "The classification(s) of the patch as provided by the patch publisher."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications: Vec<String>,
     #[doc = "Describes the reboot requirements of the patch."]
     #[serde(rename = "rebootBehavior", default, skip_serializing_if = "Option::is_none")]
@@ -14273,7 +15006,11 @@ pub struct VirtualMachineUpdate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<VirtualMachineIdentity>,
     #[doc = "The virtual machine zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl VirtualMachineUpdate {
@@ -14285,7 +15022,11 @@ impl VirtualMachineUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmImagesInEdgeZoneListResult {
     #[doc = "The list of VMImages in EdgeZone"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineImageResource>,
     #[doc = "The URI to fetch the next page of VMImages in EdgeZone. Call ListNext() with this URI to fetch the next page of VmImages."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14300,7 +15041,11 @@ impl VmImagesInEdgeZoneListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WinRmConfiguration {
     #[doc = "The list of Windows Remote Management listeners"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub listeners: Vec<WinRmListener>,
 }
 impl WinRmConfiguration {
@@ -14345,7 +15090,12 @@ pub struct WindowsConfiguration {
     #[serde(rename = "timeZone", default, skip_serializing_if = "Option::is_none")]
     pub time_zone: Option<String>,
     #[doc = "Specifies additional base-64 encoded XML formatted information that can be included in the Unattend.xml file, which is used by Windows Setup."]
-    #[serde(rename = "additionalUnattendContent", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalUnattendContent",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_unattend_content: Vec<AdditionalUnattendContent>,
     #[doc = "Specifies settings related to VM Guest Patching on Windows."]
     #[serde(rename = "patchSettings", default, skip_serializing_if = "Option::is_none")]
@@ -14363,13 +15113,28 @@ impl WindowsConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WindowsParameters {
     #[doc = "The update classifications to select when installing patches for Windows."]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
     #[doc = "Kbs to include in the patch operation"]
-    #[serde(rename = "kbNumbersToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_include: Vec<String>,
     #[doc = "Kbs to exclude in the patch operation"]
-    #[serde(rename = "kbNumbersToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_exclude: Vec<String>,
     #[doc = "Filters out Kbs that don't have an InstallationRebootBehavior of 'NeverReboots' when this is set to true."]
     #[serde(rename = "excludeKbsRequiringReboot", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/compute/src/package_2022_03_01/models.rs b/services/mgmt/compute/src/package_2022_03_01/models.rs
index 8ce008bc35..aced1e7385 100644
--- a/services/mgmt/compute/src/package_2022_03_01/models.rs
+++ b/services/mgmt/compute/src/package_2022_03_01/models.rs
@@ -90,7 +90,11 @@ impl ApiEntityReference {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiError {
     #[doc = "The Api error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ApiErrorBase>,
     #[doc = "Inner error details."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -132,7 +136,12 @@ impl ApiErrorBase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationProfile {
     #[doc = "Specifies the gallery applications that should be made available to the VM/VMSS"]
-    #[serde(rename = "galleryApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "galleryApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gallery_applications: Vec<VmGalleryApplication>,
 }
 impl ApplicationProfile {
@@ -321,12 +330,21 @@ pub struct AvailabilitySetProperties {
     #[serde(rename = "platformFaultDomainCount", default, skip_serializing_if = "Option::is_none")]
     pub platform_fault_domain_count: Option<i32>,
     #[doc = "A list of references to all virtual machines in the availability set."]
-    #[serde(rename = "virtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines: Vec<SubResource>,
     #[serde(rename = "proximityPlacementGroup", default, skip_serializing_if = "Option::is_none")]
     pub proximity_placement_group: Option<SubResource>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl AvailabilitySetProperties {
@@ -530,7 +548,11 @@ pub struct CapacityReservation {
     #[doc = "Describes a virtual machine scale set sku. NOTE: If the new VM SKU is not supported on the hardware the scale set is currently on, you need to deallocate the VMs in the scale set before you modify the SKU name."]
     pub sku: Sku,
     #[doc = "Availability Zone to use for this capacity reservation. The zone has to be single value and also should be part for the list of zones specified during the capacity reservation group creation. The zone can be assigned only during creation. If not provided, the reservation supports only non-zonal deployments. If provided, enforces VM/VMSS using this capacity reservation to be in same zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl CapacityReservation {
@@ -552,7 +574,11 @@ pub struct CapacityReservationGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<CapacityReservationGroupProperties>,
     #[doc = "Availability Zones to use for this capacity reservation group. The zones can be assigned only during creation. If not provided, the group supports only regional resources in the region. If provided, enforces each capacity reservation in the group to be in one of the zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl CapacityReservationGroup {
@@ -567,7 +593,12 @@ impl CapacityReservationGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityReservationGroupInstanceView {
     #[doc = "List of instance view of the capacity reservations under the capacity reservation group."]
-    #[serde(rename = "capacityReservations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "capacityReservations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capacity_reservations: Vec<CapacityReservationInstanceViewWithName>,
 }
 impl CapacityReservationGroupInstanceView {
@@ -599,10 +630,20 @@ impl CapacityReservationGroupListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityReservationGroupProperties {
     #[doc = "A list of all capacity reservation resource ids that belong to capacity reservation group."]
-    #[serde(rename = "capacityReservations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "capacityReservations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capacity_reservations: Vec<SubResourceReadOnly>,
     #[doc = "A list of references to all virtual machines associated to the capacity reservation group."]
-    #[serde(rename = "virtualMachinesAssociated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachinesAssociated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines_associated: Vec<SubResourceReadOnly>,
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<CapacityReservationGroupInstanceView>,
@@ -633,7 +674,11 @@ pub struct CapacityReservationInstanceView {
     #[serde(rename = "utilizationInfo", default, skip_serializing_if = "Option::is_none")]
     pub utilization_info: Option<CapacityReservationUtilization>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl CapacityReservationInstanceView {
@@ -693,7 +738,12 @@ pub struct CapacityReservationProperties {
     #[serde(rename = "reservationId", default, skip_serializing_if = "Option::is_none")]
     pub reservation_id: Option<String>,
     #[doc = "A list of all virtual machine resource ids that are associated with the capacity reservation."]
-    #[serde(rename = "virtualMachinesAssociated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachinesAssociated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines_associated: Vec<SubResourceReadOnly>,
     #[doc = "The date time when the capacity reservation was last updated."]
     #[serde(rename = "provisioningTime", default, with = "azure_core::date::rfc3339::option")]
@@ -734,7 +784,12 @@ impl CapacityReservationUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityReservationUtilization {
     #[doc = "A list of all virtual machines resource ids allocated against the capacity reservation."]
-    #[serde(rename = "virtualMachinesAllocated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachinesAllocated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines_allocated: Vec<SubResourceReadOnly>,
 }
 impl CapacityReservationUtilization {
@@ -797,7 +852,11 @@ impl CloudService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceExtensionProfile {
     #[doc = "List of extensions for the cloud service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<Extension>,
 }
 impl CloudServiceExtensionProfile {
@@ -835,7 +894,12 @@ pub struct CloudServiceExtensionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "Optional list of roles to apply this extension. If property is not specified or '*' is specified, extension is applied to all roles in the cloud service."]
-    #[serde(rename = "rolesAppliedTo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rolesAppliedTo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles_applied_to: Vec<String>,
 }
 impl CloudServiceExtensionProperties {
@@ -853,9 +917,18 @@ pub struct CloudServiceInstanceView {
     #[serde(rename = "sdkVersion", default, skip_serializing_if = "Option::is_none")]
     pub sdk_version: Option<String>,
     #[doc = "Specifies a list of unique identifiers generated internally for the cloud service. <br /><br /> NOTE: If you are using Azure Diagnostics extension, this property can be used as 'DeploymentId' for querying details."]
-    #[serde(rename = "privateIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ids: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceInstanceViewStatus>,
 }
 impl CloudServiceInstanceView {
@@ -884,7 +957,12 @@ impl CloudServiceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceNetworkProfile {
     #[doc = "List of Load balancer configurations. Cloud service can have up to two load balancer configurations, corresponding to a Public Load Balancer and an Internal Load Balancer."]
-    #[serde(rename = "loadBalancerConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_configurations: Vec<LoadBalancerConfiguration>,
     #[serde(rename = "swappableCloudService", default, skip_serializing_if = "Option::is_none")]
     pub swappable_cloud_service: Option<SubResource>,
@@ -898,7 +976,11 @@ impl CloudServiceNetworkProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceOsProfile {
     #[doc = "Specifies set of certificates that should be installed onto the role instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<CloudServiceVaultSecretGroup>,
 }
 impl CloudServiceOsProfile {
@@ -999,7 +1081,11 @@ impl CloudServiceRoleListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceRoleProfile {
     #[doc = "List of roles for the cloud service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<CloudServiceRoleProfileProperties>,
 }
 impl CloudServiceRoleProfile {
@@ -1132,7 +1218,12 @@ pub struct CloudServiceVaultSecretGroup {
     #[serde(rename = "sourceVault", default, skip_serializing_if = "Option::is_none")]
     pub source_vault: Option<SubResource>,
     #[doc = "The list of key vault references in SourceVault which contain certificates."]
-    #[serde(rename = "vaultCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_certificates: Vec<CloudServiceVaultCertificate>,
 }
 impl CloudServiceVaultSecretGroup {
@@ -1201,7 +1292,11 @@ pub struct CommunityGalleryImageProperties {
     #[serde(rename = "hyperVGeneration", default, skip_serializing_if = "Option::is_none")]
     pub hyper_v_generation: Option<community_gallery_image_properties::HyperVGeneration>,
     #[doc = "A list of gallery image features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<GalleryImageFeature>,
     #[doc = "Describes the gallery image definition purchase plan. This is used by marketplace images."]
     #[serde(rename = "purchasePlan", default, skip_serializing_if = "Option::is_none")]
@@ -1326,7 +1421,12 @@ pub struct CommunityGalleryInfo {
     #[serde(rename = "communityGalleryEnabled", default, skip_serializing_if = "Option::is_none")]
     pub community_gallery_enabled: Option<bool>,
     #[doc = "Community gallery public name list."]
-    #[serde(rename = "publicNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_names: Vec<String>,
 }
 impl CommunityGalleryInfo {
@@ -1338,7 +1438,11 @@ impl CommunityGalleryInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeOperationListResult {
     #[doc = "The list of compute operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputeOperationValue>,
 }
 impl azure_core::Continuable for ComputeOperationListResult {
@@ -1705,7 +1809,12 @@ impl DedicatedHostAllocatableVm {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedHostAvailableCapacity {
     #[doc = "The unutilized capacity of the dedicated host represented in terms of each VM size that is allowed to be deployed to the dedicated host."]
-    #[serde(rename = "allocatableVMs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allocatableVMs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allocatable_v_ms: Vec<DedicatedHostAllocatableVm>,
 }
 impl DedicatedHostAvailableCapacity {
@@ -1722,7 +1831,11 @@ pub struct DedicatedHostGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<DedicatedHostGroupProperties>,
     #[doc = "Availability Zone to use for this host group. Only single zone is supported. The zone can be assigned only during creation. If not provided, the group supports all zones in the region. If provided, enforces each host in the group to be in the same zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl DedicatedHostGroup {
@@ -1737,7 +1850,11 @@ impl DedicatedHostGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedHostGroupInstanceView {
     #[doc = "List of instance view of the dedicated hosts under the dedicated host group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosts: Vec<DedicatedHostInstanceViewWithName>,
 }
 impl DedicatedHostGroupInstanceView {
@@ -1772,7 +1889,11 @@ pub struct DedicatedHostGroupProperties {
     #[serde(rename = "platformFaultDomainCount")]
     pub platform_fault_domain_count: i32,
     #[doc = "A list of references to all dedicated hosts in the dedicated host group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosts: Vec<SubResourceReadOnly>,
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<DedicatedHostGroupInstanceView>,
@@ -1818,7 +1939,11 @@ pub struct DedicatedHostGroupUpdate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<DedicatedHostGroupProperties>,
     #[doc = "Availability Zone to use for this host group. Only single zone is supported. The zone can be assigned only during creation. If not provided, the group supports all zones in the region. If provided, enforces each host in the group to be in the same zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl DedicatedHostGroupUpdate {
@@ -1836,7 +1961,11 @@ pub struct DedicatedHostInstanceView {
     #[serde(rename = "availableCapacity", default, skip_serializing_if = "Option::is_none")]
     pub available_capacity: Option<DedicatedHostAvailableCapacity>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl DedicatedHostInstanceView {
@@ -1900,7 +2029,12 @@ pub struct DedicatedHostProperties {
     #[serde(rename = "hostId", default, skip_serializing_if = "Option::is_none")]
     pub host_id: Option<String>,
     #[doc = "A list of references to all virtual machines in the Dedicated Host."]
-    #[serde(rename = "virtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines: Vec<SubResourceReadOnly>,
     #[doc = "Specifies the software license type that will be applied to the VMs deployed on the dedicated host. <br><br> Possible values are: <br><br> **None** <br><br> **Windows_Server_Hybrid** <br><br> **Windows_Server_Perpetual** <br><br> Default: **None**"]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -2112,7 +2246,12 @@ impl DiffDiskSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Disallowed {
     #[doc = "A list of disk types."]
-    #[serde(rename = "diskTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_types: Vec<String>,
 }
 impl Disallowed {
@@ -2181,13 +2320,22 @@ pub struct Disk {
     #[serde(rename = "managedBy", default, skip_serializing_if = "Option::is_none")]
     pub managed_by: Option<String>,
     #[doc = "List of relative URIs containing the IDs of the VMs that have the disk attached. maxShares should be set to a value greater than one for disks to allow attaching them to multiple VMs."]
-    #[serde(rename = "managedByExtended", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedByExtended",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_by_extended: Vec<String>,
     #[doc = "The disks sku name. Can be Standard_LRS, Premium_LRS, StandardSSD_LRS, UltraSSD_LRS, Premium_ZRS, or StandardSSD_ZRS."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<DiskSku>,
     #[doc = "The Logical zone list for Disk."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The complex type of the extended location."]
     #[serde(rename = "extendedLocation", default, skip_serializing_if = "Option::is_none")]
@@ -2252,7 +2400,12 @@ impl DiskAccessList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskAccessProperties {
     #[doc = "A readonly collection of private endpoint connections created on the disk. Currently only one endpoint connection is supported."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The disk access resource provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2447,10 +2600,19 @@ pub struct DiskInstanceView {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Specifies the encryption settings for the OS Disk. <br><br> Minimum api-version: 2015-06-15"]
-    #[serde(rename = "encryptionSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "encryptionSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub encryption_settings: Vec<DiskEncryptionSettings>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl DiskInstanceView {
@@ -2536,7 +2698,12 @@ pub struct DiskProperties {
     #[serde(rename = "maxShares", default, skip_serializing_if = "Option::is_none")]
     pub max_shares: Option<i32>,
     #[doc = "Details of the list of all VMs that have the disk attached. maxShares should be set to a value greater than one for disks to allow attaching them to multiple VMs."]
-    #[serde(rename = "shareInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_info: Vec<ShareInfoElement>,
     #[doc = "Policy for accessing the disk via network."]
     #[serde(rename = "networkAccessPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -3117,7 +3284,12 @@ pub struct EncryptionImages {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<OsDiskImageEncryption>,
     #[doc = "A list of encryption specifications for data disk images."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<DataDiskImageEncryption>,
 }
 impl EncryptionImages {
@@ -3192,7 +3364,12 @@ pub struct EncryptionSetProperties {
     #[serde(rename = "activeKey", default, skip_serializing_if = "Option::is_none")]
     pub active_key: Option<KeyForDiskEncryptionSet>,
     #[doc = "A readonly collection of key vault keys previously used by this disk encryption set while a key rotation is in progress. It will be empty if there is no ongoing key rotation."]
-    #[serde(rename = "previousKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "previousKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub previous_keys: Vec<KeyForDiskEncryptionSet>,
     #[doc = "The disk encryption set provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3218,7 +3395,12 @@ pub struct EncryptionSettingsCollection {
     #[doc = "Set this flag to true and provide DiskEncryptionKey and optional KeyEncryptionKey to enable encryption. Set this flag to false and remove DiskEncryptionKey and KeyEncryptionKey to disable encryption. If EncryptionSettings is null in the request object, the existing settings remain unchanged."]
     pub enabled: bool,
     #[doc = "A collection of encryption settings, one for each disk volume."]
-    #[serde(rename = "encryptionSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "encryptionSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub encryption_settings: Vec<EncryptionSettingsElement>,
     #[doc = "Describes what type of encryption is used for the disks. Once this field is set, it cannot be overwritten. '1.0' corresponds to Azure Disk Encryption with AAD app.'1.1' corresponds to Azure Disk Encryption."]
     #[serde(rename = "encryptionSettingsVersion", default, skip_serializing_if = "Option::is_none")]
@@ -3582,7 +3764,12 @@ impl GalleryApplicationVersionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GalleryArtifactPublishingProfileBase {
     #[doc = "The target regions where the Image Version is going to be replicated to. This property is updatable."]
-    #[serde(rename = "targetRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_regions: Vec<TargetRegion>,
     #[doc = "The number of replicas of the Image Version to be created per region. This property would take effect for a region when regionalReplicaCount is not specified. This property is updatable."]
     #[serde(rename = "replicaCount", default, skip_serializing_if = "Option::is_none")]
@@ -3603,7 +3790,12 @@ pub struct GalleryArtifactPublishingProfileBase {
     #[serde(rename = "replicationMode", default, skip_serializing_if = "Option::is_none")]
     pub replication_mode: Option<gallery_artifact_publishing_profile_base::ReplicationMode>,
     #[doc = "The target extended locations where the Image Version is going to be replicated to. This property is updatable."]
-    #[serde(rename = "targetExtendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetExtendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_extended_locations: Vec<GalleryTargetExtendedLocation>,
 }
 impl GalleryArtifactPublishingProfileBase {
@@ -3936,7 +4128,11 @@ pub struct GalleryImageProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<gallery_image_properties::ProvisioningState>,
     #[doc = "A list of gallery image features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<GalleryImageFeature>,
     #[doc = "The architecture of the image. Applicable to OS disks only."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4178,7 +4374,12 @@ pub struct GalleryImageVersionStorageProfile {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<GalleryOsDiskImage>,
     #[doc = "A list of data disk images."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<GalleryDataDiskImage>,
 }
 impl GalleryImageVersionStorageProfile {
@@ -5222,7 +5423,12 @@ pub struct ImageStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<ImageOsDisk>,
     #[doc = "Specifies the parameters that are used to add a data disk to a virtual machine. <br><br> For more information about disks, see [About disks and VHDs for Azure virtual machines](https://docs.microsoft.com/azure/virtual-machines/managed-disks-overview)."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<ImageDataDisk>,
     #[doc = "Specifies whether an image is zone resilient or not. Default is false. Zone resilient images can be created only in regions that provide Zone Redundant Storage (ZRS)."]
     #[serde(rename = "zoneResilient", default, skip_serializing_if = "Option::is_none")]
@@ -5313,7 +5519,12 @@ pub mod instance_view_status {
 #[doc = "Instance view statuses."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstanceViewStatusesSummary {
-    #[serde(rename = "statusesSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusesSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses_summary: Vec<StatusCodeCount>,
 }
 impl InstanceViewStatusesSummary {
@@ -5510,13 +5721,28 @@ impl LinuxConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinuxParameters {
     #[doc = "The update classifications to select when installing patches for Linux."]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
     #[doc = "packages to include in the patch operation. Format: packageName_packageVersion"]
-    #[serde(rename = "packageNameMasksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_include: Vec<String>,
     #[doc = "packages to exclude in the patch operation. Format: packageName_packageVersion"]
-    #[serde(rename = "packageNameMasksToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_exclude: Vec<String>,
     #[doc = "This is used as a maintenance run identifier for Auto VM Guest Patching in Linux."]
     #[serde(rename = "maintenanceRunId", default, skip_serializing_if = "Option::is_none")]
@@ -6008,13 +6234,23 @@ pub mod network_interface_reference_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfile {
     #[doc = "Specifies the list of resource Ids for the network interfaces associated with the virtual machine."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterfaceReference>,
     #[doc = "specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations"]
     #[serde(rename = "networkApiVersion", default, skip_serializing_if = "Option::is_none")]
     pub network_api_version: Option<network_profile::NetworkApiVersion>,
     #[doc = "Specifies the networking configurations that will be used to create the virtual machine networking resources."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineNetworkInterfaceConfiguration>,
 }
 impl NetworkProfile {
@@ -6274,7 +6510,11 @@ pub struct OsFamilyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "List of OS versions belonging to this family."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub versions: Vec<OsVersionPropertiesBase>,
 }
 impl OsFamilyProperties {
@@ -6304,7 +6544,11 @@ pub struct OsProfile {
     #[serde(rename = "linuxConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub linux_configuration: Option<LinuxConfiguration>,
     #[doc = "Specifies set of certificates that should be installed onto the virtual machine. To install certificates on a virtual machine it is recommended to use the [Azure Key Vault virtual machine extension for Linux](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-linux) or the [Azure Key Vault virtual machine extension for Windows](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-windows)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<VaultSecretGroup>,
     #[doc = "Specifies whether extension operations should be allowed on the virtual machine. <br><br>This may only be set to False when no extensions are present on the virtual machine."]
     #[serde(rename = "allowExtensionOperations", default, skip_serializing_if = "Option::is_none")]
@@ -6641,7 +6885,11 @@ pub struct PatchInstallationDetail {
     #[serde(rename = "kbId", default, skip_serializing_if = "Option::is_none")]
     pub kb_id: Option<String>,
     #[doc = "The classification(s) of the patch as provided by the patch publisher."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications: Vec<String>,
     #[doc = "The state of the patch after the installation operation completed."]
     #[serde(rename = "installationState", default, skip_serializing_if = "Option::is_none")]
@@ -6909,7 +7157,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The uri to fetch the next page of snapshots. Call ListNext() with this to fetch the next page of snapshots."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7053,7 +7305,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -7068,10 +7324,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -7118,7 +7384,11 @@ pub struct ProximityPlacementGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<ProximityPlacementGroupProperties>,
     #[doc = "Specifies the Availability Zone where virtual machine, virtual machine scale set or availability set associated with the  proximity placement group can be created."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ProximityPlacementGroup {
@@ -7157,13 +7427,28 @@ pub struct ProximityPlacementGroupProperties {
     #[serde(rename = "proximityPlacementGroupType", default, skip_serializing_if = "Option::is_none")]
     pub proximity_placement_group_type: Option<proximity_placement_group_properties::ProximityPlacementGroupType>,
     #[doc = "A list of references to all virtual machines in the proximity placement group."]
-    #[serde(rename = "virtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines: Vec<SubResourceWithColocationStatus>,
     #[doc = "A list of references to all virtual machine scale sets in the proximity placement group."]
-    #[serde(rename = "virtualMachineScaleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachineScaleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machine_scale_sets: Vec<SubResourceWithColocationStatus>,
     #[doc = "A list of references to all availability sets in the proximity placement group."]
-    #[serde(rename = "availabilitySets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilitySets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_sets: Vec<SubResourceWithColocationStatus>,
     #[doc = "Instance view status."]
     #[serde(rename = "colocationStatus", default, skip_serializing_if = "Option::is_none")]
@@ -7220,7 +7505,12 @@ pub mod proximity_placement_group_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Intent {
         #[doc = "Specifies possible sizes of virtual machines that can be created in the proximity placement group."]
-        #[serde(rename = "vmSizes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "vmSizes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub vm_sizes: Vec<String>,
     }
     impl Intent {
@@ -7540,7 +7830,11 @@ pub struct ReplicationStatus {
     #[serde(rename = "aggregatedState", default, skip_serializing_if = "Option::is_none")]
     pub aggregated_state: Option<replication_status::AggregatedState>,
     #[doc = "This is a summary of replication status for each region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub summary: Vec<RegionalReplicationStatus>,
 }
 impl ReplicationStatus {
@@ -7723,22 +8017,48 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<ResourceSkuCapacity>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "A list of locations and availability zones in those locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "The api versions that support this SKU."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Metadata for retrieving price info."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<ResourceSkuCosts>,
     #[doc = "A name value pair to describe the capability."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -7817,13 +8137,27 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "List of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ResourceSkuZoneDetails>,
     #[doc = "The names of extended locations."]
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<String>,
     #[doc = "The type of the extended location."]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
@@ -7876,10 +8210,18 @@ pub mod resource_sku_location_info {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuRestrictionInfo {
     #[doc = "Locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "List of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuRestrictionInfo {
@@ -7894,7 +8236,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Describes an available Compute SKU Restriction Information."]
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
@@ -7927,10 +8273,18 @@ pub mod resource_sku_restrictions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuZoneDetails {
     #[doc = "The set of zones that the SKU is available in with the specified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
     #[doc = "A list of capabilities that are available for the SKU in the specified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
 }
 impl ResourceSkuZoneDetails {
@@ -8037,7 +8391,11 @@ impl RestorePointCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointCollectionListResult {
     #[doc = "Gets the list of restore point collections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorePointCollection>,
     #[doc = "The uri to fetch the next page of RestorePointCollections. Call ListNext() with this to fetch the next page of RestorePointCollections"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8067,7 +8425,12 @@ pub struct RestorePointCollectionProperties {
     #[serde(rename = "restorePointCollectionId", default, skip_serializing_if = "Option::is_none")]
     pub restore_point_collection_id: Option<String>,
     #[doc = "A list containing all restore points created under this restore point collection."]
-    #[serde(rename = "restorePoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restorePoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_points: Vec<RestorePoint>,
 }
 impl RestorePointCollectionProperties {
@@ -8108,10 +8471,19 @@ impl RestorePointCollectionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointInstanceView {
     #[doc = "The disk restore points information."]
-    #[serde(rename = "diskRestorePoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskRestorePoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_restore_points: Vec<DiskRestorePointInstanceView>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl RestorePointInstanceView {
@@ -8123,7 +8495,12 @@ impl RestorePointInstanceView {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointProperties {
     #[doc = "List of disk resource ids that the customer wishes to exclude from the restore point. If no disks are specified, all disks will be included."]
-    #[serde(rename = "excludeDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludeDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude_disks: Vec<ApiEntityReference>,
     #[doc = "Describes the properties of the Virtual Machine for which the restore point was created. The properties provided are a subset and the snapshot of the overall Virtual Machine properties captured at the time of the restore point creation."]
     #[serde(rename = "sourceMetadata", default, skip_serializing_if = "Option::is_none")]
@@ -8328,7 +8705,12 @@ pub struct RestorePointSourceVmStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<RestorePointSourceVmosDisk>,
     #[doc = "Gets the data disks of the VM captured at the time of the restore point creation."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<RestorePointSourceVmDataDisk>,
 }
 impl RestorePointSourceVmStorageProfile {
@@ -8390,7 +8772,11 @@ pub struct RoleInstanceInstanceView {
     #[doc = "Specifies a unique identifier generated internally for the cloud service associated with this role instance. <br /><br /> NOTE: If you are using Azure Diagnostics extension, this property can be used as 'DeploymentId' for querying details."]
     #[serde(rename = "privateId", default, skip_serializing_if = "Option::is_none")]
     pub private_id: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceInstanceViewStatus>,
 }
 impl RoleInstanceInstanceView {
@@ -8419,7 +8805,12 @@ impl RoleInstanceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleInstanceNetworkProfile {
     #[doc = "Specifies the list of resource Ids for the network interfaces associated with the role instance."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<SubResource>,
 }
 impl RoleInstanceNetworkProfile {
@@ -8603,7 +8994,11 @@ pub struct RunCommandDocument {
     #[doc = "The script to be executed."]
     pub script: Vec<String>,
     #[doc = "The parameters used by the script."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<RunCommandParameterDefinition>,
 }
 impl RunCommandDocument {
@@ -8658,10 +9053,18 @@ pub struct RunCommandInput {
     #[serde(rename = "commandId")]
     pub command_id: String,
     #[doc = "Optional. The script to be executed.  When this value is given, the given script will override the default script of the command."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub script: Vec<String>,
     #[doc = "The run command parameters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<RunCommandInputParameter>,
 }
 impl RunCommandInput {
@@ -8734,7 +9137,11 @@ impl RunCommandParameterDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunCommandResult {
     #[doc = "Run command operation response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InstanceViewStatus>,
 }
 impl RunCommandResult {
@@ -8746,7 +9153,11 @@ impl RunCommandResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScaleInPolicy {
     #[doc = "The rules to be followed when scaling-in a virtual machine scale set. <br><br> Possible values are: <br><br> **Default** When a virtual machine scale set is scaled in, the scale set will first be balanced across zones if it is a zonal scale set. Then, it will be balanced across Fault Domains as far as possible. Within each Fault Domain, the virtual machines chosen for removal will be the newest ones that are not protected from scale-in. <br><br> **OldestVM** When a virtual machine scale set is being scaled-in, the oldest virtual machines that are not protected from scale-in will be chosen for removal. For zonal virtual machine scale sets, the scale set will first be balanced across zones. Within each zone, the oldest virtual machines that are not protected will be chosen for removal. <br><br> **NewestVM** When a virtual machine scale set is being scaled-in, the newest virtual machines that are not protected from scale-in will be chosen for removal. For zonal virtual machine scale sets, the scale set will first be balanced across zones. Within each zone, the newest virtual machines that are not protected will be chosen for removal. <br><br>"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<String>,
     #[doc = "This property allows you to specify if virtual machines chosen for removal have to be force deleted when a virtual machine scale set is being scaled-in.(Feature in Preview)"]
     #[serde(rename = "forceDeletion", default, skip_serializing_if = "Option::is_none")]
@@ -8918,7 +9329,11 @@ pub struct SharedGalleryImageProperties {
     #[serde(rename = "hyperVGeneration", default, skip_serializing_if = "Option::is_none")]
     pub hyper_v_generation: Option<shared_gallery_image_properties::HyperVGeneration>,
     #[doc = "A list of gallery image features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<GalleryImageFeature>,
     #[doc = "Describes the gallery image definition purchase plan. This is used by marketplace images."]
     #[serde(rename = "purchasePlan", default, skip_serializing_if = "Option::is_none")]
@@ -9071,7 +9486,11 @@ pub struct SharingProfile {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub permissions: Option<sharing_profile::Permissions>,
     #[doc = "A list of sharing profile groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<SharingProfileGroup>,
     #[doc = "Information of community gallery if current gallery is shared to community"]
     #[serde(rename = "communityGalleryInfo", default, skip_serializing_if = "Option::is_none")]
@@ -9129,7 +9548,11 @@ pub struct SharingProfileGroup {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<sharing_profile_group::Type>,
     #[doc = "A list of subscription/tenant ids the gallery is aimed to be shared to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ids: Vec<String>,
 }
 impl SharingProfileGroup {
@@ -9228,7 +9651,11 @@ pub struct SharingStatus {
     #[serde(rename = "aggregatedState", default, skip_serializing_if = "Option::is_none")]
     pub aggregated_state: Option<SharingState>,
     #[doc = "Summary of all regional sharing status."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub summary: Vec<RegionalSharingStatus>,
 }
 impl SharingStatus {
@@ -9243,7 +9670,11 @@ pub struct SharingUpdate {
     #[serde(rename = "operationType")]
     pub operation_type: sharing_update::OperationType,
     #[doc = "A list of sharing profile groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<SharingProfileGroup>,
 }
 impl SharingUpdate {
@@ -9674,7 +10105,12 @@ impl SpotRestorePolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SshConfiguration {
     #[doc = "The list of SSH public keys used to authenticate with linux based VMs."]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<SshPublicKey>,
 }
 impl SshConfiguration {
@@ -9859,7 +10295,12 @@ pub struct StorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
     #[doc = "Specifies the parameters that are used to add a data disk to a virtual machine. <br><br> For more information about disks, see [About disks and VHDs for Azure virtual machines](https://docs.microsoft.com/azure/virtual-machines/managed-disks-overview)."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
 }
 impl StorageProfile {
@@ -10474,7 +10915,12 @@ pub struct VaultSecretGroup {
     #[serde(rename = "sourceVault", default, skip_serializing_if = "Option::is_none")]
     pub source_vault: Option<SubResource>,
     #[doc = "The list of key vault references in SourceVault which contain certificates."]
-    #[serde(rename = "vaultCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_certificates: Vec<VaultCertificate>,
 }
 impl VaultSecretGroup {
@@ -10506,13 +10952,21 @@ pub struct VirtualMachine {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<VirtualMachineProperties>,
     #[doc = "The virtual machine child extension resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<VirtualMachineExtension>,
     #[doc = "Identity for the virtual machine."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<VirtualMachineIdentity>,
     #[doc = "The virtual machine zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The complex type of the extended location."]
     #[serde(rename = "extendedLocation", default, skip_serializing_if = "Option::is_none")]
@@ -10538,10 +10992,19 @@ pub struct VirtualMachineAgentInstanceView {
     #[serde(rename = "vmAgentVersion", default, skip_serializing_if = "Option::is_none")]
     pub vm_agent_version: Option<String>,
     #[doc = "The virtual machine extension handler instance view."]
-    #[serde(rename = "extensionHandlers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extensionHandlers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extension_handlers: Vec<VirtualMachineExtensionHandlerInstanceView>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachineAgentInstanceView {
@@ -10571,7 +11034,12 @@ pub struct VirtualMachineAssessPatchesResult {
     #[serde(rename = "startDateTime", default, with = "azure_core::date::rfc3339::option")]
     pub start_date_time: Option<time::OffsetDateTime>,
     #[doc = "The list of patches that have been detected as available for installation."]
-    #[serde(rename = "availablePatches", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availablePatches",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_patches: Vec<VirtualMachineSoftwarePatchProperties>,
     #[doc = "Api error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10665,7 +11133,11 @@ pub struct VirtualMachineCaptureResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<serde_json::Value>,
     #[doc = "a list of resource items of the captured virtual machine"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<serde_json::Value>,
 }
 impl VirtualMachineCaptureResult {
@@ -10765,10 +11237,18 @@ pub struct VirtualMachineExtensionInstanceView {
     #[serde(rename = "typeHandlerVersion", default, skip_serializing_if = "Option::is_none")]
     pub type_handler_version: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub substatuses: Vec<InstanceViewStatus>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachineExtensionInstanceView {
@@ -10878,7 +11358,11 @@ impl VirtualMachineExtensionUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineExtensionsListResult {
     #[doc = "The list of extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineExtension>,
 }
 impl VirtualMachineExtensionsListResult {
@@ -10972,7 +11456,12 @@ pub struct VirtualMachineImageProperties {
     #[doc = "Contains the os disk image information."]
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<OsDiskImage>,
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<DataDiskImage>,
     #[doc = "Describes automatic OS upgrade properties on the image."]
     #[serde(rename = "automaticOSUpgradeProperties", default, skip_serializing_if = "Option::is_none")]
@@ -10983,7 +11472,11 @@ pub struct VirtualMachineImageProperties {
     #[doc = "Specifies the disallowed configuration for a virtual machine image."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub disallowed: Option<DisallowedConfiguration>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<VirtualMachineImageFeature>,
     #[doc = "Specifies the Architecture Type"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11120,7 +11613,11 @@ pub struct VirtualMachineInstallPatchesResult {
     #[serde(rename = "failedPatchCount", default, skip_serializing_if = "Option::is_none")]
     pub failed_patch_count: Option<i32>,
     #[doc = "The patches that were installed during the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub patches: Vec<PatchInstallationDetail>,
     #[doc = "The UTC timestamp when the operation began."]
     #[serde(rename = "startDateTime", default, with = "azure_core::date::rfc3339::option")]
@@ -11256,10 +11753,18 @@ pub struct VirtualMachineInstanceView {
     #[serde(rename = "maintenanceRedeployStatus", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_redeploy_status: Option<MaintenanceRedeployStatus>,
     #[doc = "The virtual machine disk information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<DiskInstanceView>,
     #[doc = "The extensions information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineExtensionInstanceView>,
     #[doc = "The health status of the VM."]
     #[serde(rename = "vmHealth", default, skip_serializing_if = "Option::is_none")]
@@ -11271,7 +11776,11 @@ pub struct VirtualMachineInstanceView {
     #[serde(rename = "assignedHost", default, skip_serializing_if = "Option::is_none")]
     pub assigned_host: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "The status of virtual machine patch operations."]
     #[serde(rename = "patchStatus", default, skip_serializing_if = "Option::is_none")]
@@ -11459,7 +11968,12 @@ pub mod virtual_machine_network_interface_configuration_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineNetworkInterfaceDnsSettingsConfiguration {
     #[doc = "List of DNS servers IP addresses"]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl VirtualMachineNetworkInterfaceDnsSettingsConfiguration {
@@ -11496,13 +12010,28 @@ pub struct VirtualMachineNetworkInterfaceIpConfigurationProperties {
     #[serde(rename = "privateIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub private_ip_address_version: Option<virtual_machine_network_interface_ip_configuration_properties::PrivateIpAddressVersion>,
     #[doc = "Specifies an array of references to application security group."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<SubResource>,
     #[doc = "Specifies an array of references to backend address pools of application gateways. A virtual machine can reference backend address pools of multiple application gateways. Multiple virtual machines cannot use the same application gateway."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to backend address pools of load balancers. A virtual machine can reference backend address pools of one public and one internal load balancer. [Multiple virtual machines cannot use the same basic sku load balancer]."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<SubResource>,
 }
 impl VirtualMachineNetworkInterfaceIpConfigurationProperties {
@@ -11560,7 +12089,12 @@ pub struct VirtualMachinePatchStatus {
     #[serde(rename = "lastPatchInstallationSummary", default, skip_serializing_if = "Option::is_none")]
     pub last_patch_installation_summary: Option<LastPatchInstallationSummary>,
     #[doc = "The enablement status of the specified patchMode"]
-    #[serde(rename = "configurationStatuses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configurationStatuses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configuration_statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachinePatchStatus {
@@ -11683,7 +12217,12 @@ pub struct VirtualMachinePublicIpAddressConfigurationProperties {
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
     pub dns_settings: Option<VirtualMachinePublicIpAddressDnsSettingsConfiguration>,
     #[doc = "The list of IP tags associated with the public IP address."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<VirtualMachineIpTag>,
     #[serde(rename = "publicIPPrefix", default, skip_serializing_if = "Option::is_none")]
     pub public_ip_prefix: Option<SubResource>,
@@ -11879,7 +12418,11 @@ pub struct VirtualMachineRunCommandInstanceView {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachineRunCommandInstanceView {
@@ -11944,10 +12487,19 @@ pub struct VirtualMachineRunCommandProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub source: Option<VirtualMachineRunCommandScriptSource>,
     #[doc = "The parameters used by the script."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<RunCommandInputParameter>,
     #[doc = "The parameters used by the script."]
-    #[serde(rename = "protectedParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_parameters: Vec<RunCommandInputParameter>,
     #[doc = "Optional. If set to true, provisioning will complete as soon as the script starts and will not wait for script to complete."]
     #[serde(rename = "asyncExecution", default, skip_serializing_if = "Option::is_none")]
@@ -12049,7 +12601,11 @@ pub struct VirtualMachineScaleSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<VirtualMachineScaleSetIdentity>,
     #[doc = "The virtual machine scale set zones. NOTE: Availability zones can only be set when you create the scale set"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The complex type of the extended location."]
     #[serde(rename = "extendedLocation", default, skip_serializing_if = "Option::is_none")]
@@ -12161,7 +12717,11 @@ impl VirtualMachineScaleSetExtensionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetExtensionProfile {
     #[doc = "The virtual machine scale set child extension resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineScaleSetExtension>,
     #[doc = "Specifies the time alloted for all extensions to start. The time duration should be between 15 minutes and 120 minutes (inclusive) and should be specified in ISO 8601 format. The default value is 90 minutes (PT1H30M). <br><br> Minimum api-version: 2020-06-01"]
     #[serde(rename = "extensionsTimeBudget", default, skip_serializing_if = "Option::is_none")]
@@ -12203,7 +12763,12 @@ pub struct VirtualMachineScaleSetExtensionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "Collection of extension names after which this extension needs to be provisioned."]
-    #[serde(rename = "provisionAfterExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisionAfterExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provision_after_extensions: Vec<String>,
     #[doc = "Indicates whether failures stemming from the extension will be suppressed (Operational failures such as not connecting to the VM will not be suppressed regardless of this value). The default is false."]
     #[serde(rename = "suppressFailures", default, skip_serializing_if = "Option::is_none")]
@@ -12285,16 +12850,36 @@ pub struct VirtualMachineScaleSetIpConfigurationProperties {
     #[serde(rename = "privateIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub private_ip_address_version: Option<virtual_machine_scale_set_ip_configuration_properties::PrivateIpAddressVersion>,
     #[doc = "Specifies an array of references to backend address pools of application gateways. A scale set can reference backend address pools of multiple application gateways. Multiple scale sets cannot use the same application gateway."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to application security group."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<SubResource>,
     #[doc = "Specifies an array of references to backend address pools of load balancers. A scale set can reference backend address pools of one public and one internal load balancer. Multiple scale sets cannot use the same basic sku load balancer."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to inbound Nat pools of the load balancers. A scale set can reference inbound nat pools of one public and one internal load balancer. Multiple scale sets cannot use the same basic sku load balancer."]
-    #[serde(rename = "loadBalancerInboundNatPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerInboundNatPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_inbound_nat_pools: Vec<SubResource>,
 }
 impl VirtualMachineScaleSetIpConfigurationProperties {
@@ -12382,13 +12967,26 @@ pub struct VirtualMachineScaleSetInstanceView {
     #[serde(rename = "virtualMachine", default, skip_serializing_if = "Option::is_none")]
     pub virtual_machine: Option<VirtualMachineScaleSetInstanceViewStatusesSummary>,
     #[doc = "The extensions information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineScaleSetVmExtensionsSummary>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "The orchestration services information."]
-    #[serde(rename = "orchestrationServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orchestrationServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub orchestration_services: Vec<OrchestrationServiceSummary>,
 }
 impl VirtualMachineScaleSetInstanceView {
@@ -12400,7 +12998,12 @@ impl VirtualMachineScaleSetInstanceView {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetInstanceViewStatusesSummary {
     #[doc = "The extensions information."]
-    #[serde(rename = "statusesSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusesSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses_summary: Vec<VirtualMachineStatusCodeCount>,
 }
 impl VirtualMachineScaleSetInstanceViewStatusesSummary {
@@ -12545,7 +13148,12 @@ impl VirtualMachineScaleSetNetworkConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetNetworkConfigurationDnsSettings {
     #[doc = "List of DNS servers IP addresses"]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl VirtualMachineScaleSetNetworkConfigurationDnsSettings {
@@ -12641,7 +13249,12 @@ pub struct VirtualMachineScaleSetNetworkProfile {
     #[serde(rename = "healthProbe", default, skip_serializing_if = "Option::is_none")]
     pub health_probe: Option<ApiEntityReference>,
     #[doc = "The list of network configurations."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineScaleSetNetworkConfiguration>,
     #[doc = "specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations for Virtual Machine Scale Set with orchestration mode 'Flexible'"]
     #[serde(rename = "networkApiVersion", default, skip_serializing_if = "Option::is_none")]
@@ -12719,7 +13332,12 @@ pub struct VirtualMachineScaleSetOsDisk {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub image: Option<VirtualHardDisk>,
     #[doc = "Specifies the container urls that are used to store operating system disks for the scale set."]
-    #[serde(rename = "vhdContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vhdContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vhd_containers: Vec<String>,
     #[doc = "Describes the parameters of a ScaleSet managed disk."]
     #[serde(rename = "managedDisk", default, skip_serializing_if = "Option::is_none")]
@@ -12776,7 +13394,11 @@ pub struct VirtualMachineScaleSetOsProfile {
     #[serde(rename = "linuxConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub linux_configuration: Option<LinuxConfiguration>,
     #[doc = "Specifies set of certificates that should be installed onto the virtual machines in the scale set. To install certificates on a virtual machine it is recommended to use the [Azure Key Vault virtual machine extension for Linux](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-linux) or the [Azure Key Vault virtual machine extension for Windows](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-windows)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<VaultSecretGroup>,
     #[doc = "Specifies whether extension operations should be allowed on the virtual machine scale set. <br><br>This may only be set to False when no extensions are present on the virtual machine scale set."]
     #[serde(rename = "allowExtensionOperations", default, skip_serializing_if = "Option::is_none")]
@@ -12892,7 +13514,12 @@ pub struct VirtualMachineScaleSetPublicIpAddressConfigurationProperties {
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
     pub dns_settings: Option<VirtualMachineScaleSetPublicIpAddressConfigurationDnsSettings>,
     #[doc = "The list of IP tags associated with the public IP address."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<VirtualMachineScaleSetIpTag>,
     #[serde(rename = "publicIPPrefix", default, skip_serializing_if = "Option::is_none")]
     pub public_ip_prefix: Option<SubResource>,
@@ -12991,7 +13618,12 @@ pub struct VirtualMachineScaleSetReimageParameters {
     #[serde(flatten)]
     pub virtual_machine_scale_set_vm_reimage_parameters: VirtualMachineScaleSetVmReimageParameters,
     #[doc = "The virtual machine scale set instance ids. Omitting the virtual machine scale set instance ids will result in the operation being performed on all virtual machines in the virtual machine scale set."]
-    #[serde(rename = "instanceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "instanceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instance_ids: Vec<String>,
 }
 impl VirtualMachineScaleSetReimageParameters {
@@ -13057,7 +13689,12 @@ pub struct VirtualMachineScaleSetStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<VirtualMachineScaleSetOsDisk>,
     #[doc = "Specifies the parameters that are used to add data disks to the virtual machines in the scale set. <br><br> For more information about disks, see [About disks and VHDs for Azure virtual machines](https://docs.microsoft.com/azure/virtual-machines/managed-disks-overview)."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<VirtualMachineScaleSetDataDisk>,
 }
 impl VirtualMachineScaleSetStorageProfile {
@@ -13121,16 +13758,36 @@ pub struct VirtualMachineScaleSetUpdateIpConfigurationProperties {
     #[serde(rename = "privateIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub private_ip_address_version: Option<virtual_machine_scale_set_update_ip_configuration_properties::PrivateIpAddressVersion>,
     #[doc = "The application gateway backend address pools."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to application security group."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<SubResource>,
     #[doc = "The load balancer backend address pools."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<SubResource>,
     #[doc = "The load balancer inbound nat pools."]
-    #[serde(rename = "loadBalancerInboundNatPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerInboundNatPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_inbound_nat_pools: Vec<SubResource>,
 }
 impl VirtualMachineScaleSetUpdateIpConfigurationProperties {
@@ -13213,7 +13870,12 @@ pub struct VirtualMachineScaleSetUpdateNetworkConfigurationProperties {
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
     pub dns_settings: Option<VirtualMachineScaleSetNetworkConfigurationDnsSettings>,
     #[doc = "The virtual machine scale set IP Configuration."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<VirtualMachineScaleSetUpdateIpConfiguration>,
     #[doc = "Whether IP forwarding enabled on this NIC."]
     #[serde(rename = "enableIPForwarding", default, skip_serializing_if = "Option::is_none")]
@@ -13274,7 +13936,12 @@ pub struct VirtualMachineScaleSetUpdateNetworkProfile {
     #[serde(rename = "healthProbe", default, skip_serializing_if = "Option::is_none")]
     pub health_probe: Option<ApiEntityReference>,
     #[doc = "The list of network configurations."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineScaleSetUpdateNetworkConfiguration>,
     #[doc = "specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations for Virtual Machine Scale Set with orchestration mode 'Flexible'"]
     #[serde(rename = "networkApiVersion", default, skip_serializing_if = "Option::is_none")]
@@ -13340,7 +14007,12 @@ pub struct VirtualMachineScaleSetUpdateOsDisk {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub image: Option<VirtualHardDisk>,
     #[doc = "The list of virtual hard disk container uris."]
-    #[serde(rename = "vhdContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vhdContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vhd_containers: Vec<String>,
     #[doc = "Describes the parameters of a ScaleSet managed disk."]
     #[serde(rename = "managedDisk", default, skip_serializing_if = "Option::is_none")]
@@ -13367,7 +14039,11 @@ pub struct VirtualMachineScaleSetUpdateOsProfile {
     #[serde(rename = "linuxConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub linux_configuration: Option<LinuxConfiguration>,
     #[doc = "The List of certificates for addition to the VM."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<VaultSecretGroup>,
 }
 impl VirtualMachineScaleSetUpdateOsProfile {
@@ -13499,7 +14175,12 @@ pub struct VirtualMachineScaleSetUpdateStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<VirtualMachineScaleSetUpdateOsDisk>,
     #[doc = "The data disks."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<VirtualMachineScaleSetDataDisk>,
 }
 impl VirtualMachineScaleSetUpdateStorageProfile {
@@ -13563,10 +14244,18 @@ pub struct VirtualMachineScaleSetVm {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub plan: Option<Plan>,
     #[doc = "The virtual machine child extension resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<VirtualMachineExtension>,
     #[doc = "The virtual machine zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Identity for the virtual machine."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -13630,7 +14319,11 @@ impl VirtualMachineScaleSetVmExtensionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetVmExtensionsListResult {
     #[doc = "The list of VMSS VM extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineScaleSetVmExtension>,
 }
 impl VirtualMachineScaleSetVmExtensionsListResult {
@@ -13645,7 +14338,12 @@ pub struct VirtualMachineScaleSetVmExtensionsSummary {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The extensions information."]
-    #[serde(rename = "statusesSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusesSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses_summary: Vec<VirtualMachineStatusCodeCount>,
 }
 impl VirtualMachineScaleSetVmExtensionsSummary {
@@ -13657,7 +14355,12 @@ impl VirtualMachineScaleSetVmExtensionsSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetVmInstanceIDs {
     #[doc = "The virtual machine scale set instance ids. Omitting the virtual machine scale set instance ids will result in the operation being performed on all virtual machines in the virtual machine scale set."]
-    #[serde(rename = "instanceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "instanceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instance_ids: Vec<String>,
 }
 impl VirtualMachineScaleSetVmInstanceIDs {
@@ -13696,10 +14399,18 @@ pub struct VirtualMachineScaleSetVmInstanceView {
     #[serde(rename = "maintenanceRedeployStatus", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_redeploy_status: Option<MaintenanceRedeployStatus>,
     #[doc = "The disks information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<DiskInstanceView>,
     #[doc = "The extensions information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineExtensionInstanceView>,
     #[doc = "The health status of the VM."]
     #[serde(rename = "vmHealth", default, skip_serializing_if = "Option::is_none")]
@@ -13708,7 +14419,11 @@ pub struct VirtualMachineScaleSetVmInstanceView {
     #[serde(rename = "bootDiagnostics", default, skip_serializing_if = "Option::is_none")]
     pub boot_diagnostics: Option<BootDiagnosticsInstanceView>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "Resource id of the dedicated host, on which the virtual machine is allocated through automatic placement, when the virtual machine is associated with a dedicated host group that has automatic placement enabled. <br><br>Minimum api-version: 2020-06-01."]
     #[serde(rename = "assignedHost", default, skip_serializing_if = "Option::is_none")]
@@ -13746,7 +14461,12 @@ impl VirtualMachineScaleSetVmListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetVmNetworkProfileConfiguration {
     #[doc = "The list of network configurations."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineScaleSetNetworkConfiguration>,
 }
 impl VirtualMachineScaleSetVmNetworkProfileConfiguration {
@@ -13923,7 +14643,11 @@ impl VirtualMachineSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineSizeListResult {
     #[doc = "The list of virtual machine sizes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineSize>,
 }
 impl azure_core::Continuable for VirtualMachineSizeListResult {
@@ -13953,7 +14677,11 @@ pub struct VirtualMachineSoftwarePatchProperties {
     #[serde(rename = "kbId", default, skip_serializing_if = "Option::is_none")]
     pub kb_id: Option<String>,
     #[doc = "The classification(s) of the patch as provided by the patch publisher."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications: Vec<String>,
     #[doc = "Describes the reboot requirements of the patch."]
     #[serde(rename = "rebootBehavior", default, skip_serializing_if = "Option::is_none")]
@@ -14087,7 +14815,11 @@ pub struct VirtualMachineUpdate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<VirtualMachineIdentity>,
     #[doc = "The virtual machine zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl VirtualMachineUpdate {
@@ -14099,7 +14831,11 @@ impl VirtualMachineUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmImagesInEdgeZoneListResult {
     #[doc = "The list of VMImages in EdgeZone"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineImageResource>,
     #[doc = "The URI to fetch the next page of VMImages in EdgeZone. Call ListNext() with this URI to fetch the next page of VmImages."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14114,7 +14850,11 @@ impl VmImagesInEdgeZoneListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WinRmConfiguration {
     #[doc = "The list of Windows Remote Management listeners"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub listeners: Vec<WinRmListener>,
 }
 impl WinRmConfiguration {
@@ -14159,7 +14899,12 @@ pub struct WindowsConfiguration {
     #[serde(rename = "timeZone", default, skip_serializing_if = "Option::is_none")]
     pub time_zone: Option<String>,
     #[doc = "Specifies additional base-64 encoded XML formatted information that can be included in the Unattend.xml file, which is used by Windows Setup."]
-    #[serde(rename = "additionalUnattendContent", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalUnattendContent",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_unattend_content: Vec<AdditionalUnattendContent>,
     #[doc = "Specifies settings related to VM Guest Patching on Windows."]
     #[serde(rename = "patchSettings", default, skip_serializing_if = "Option::is_none")]
@@ -14177,13 +14922,28 @@ impl WindowsConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WindowsParameters {
     #[doc = "The update classifications to select when installing patches for Windows."]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
     #[doc = "Kbs to include in the patch operation"]
-    #[serde(rename = "kbNumbersToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_include: Vec<String>,
     #[doc = "Kbs to exclude in the patch operation"]
-    #[serde(rename = "kbNumbersToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_exclude: Vec<String>,
     #[doc = "Filters out Kbs that don't have an InstallationRebootBehavior of 'NeverReboots' when this is set to true."]
     #[serde(rename = "excludeKbsRequiringReboot", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/compute/src/package_2022_03_02/models.rs b/services/mgmt/compute/src/package_2022_03_02/models.rs
index b828511065..e2c25d6503 100644
--- a/services/mgmt/compute/src/package_2022_03_02/models.rs
+++ b/services/mgmt/compute/src/package_2022_03_02/models.rs
@@ -90,7 +90,11 @@ impl ApiEntityReference {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiError {
     #[doc = "The Api error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ApiErrorBase>,
     #[doc = "Inner error details."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -132,7 +136,12 @@ impl ApiErrorBase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationProfile {
     #[doc = "Specifies the gallery applications that should be made available to the VM/VMSS"]
-    #[serde(rename = "galleryApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "galleryApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gallery_applications: Vec<VmGalleryApplication>,
 }
 impl ApplicationProfile {
@@ -359,12 +368,21 @@ pub struct AvailabilitySetProperties {
     #[serde(rename = "platformFaultDomainCount", default, skip_serializing_if = "Option::is_none")]
     pub platform_fault_domain_count: Option<i32>,
     #[doc = "A list of references to all virtual machines in the availability set."]
-    #[serde(rename = "virtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines: Vec<SubResource>,
     #[serde(rename = "proximityPlacementGroup", default, skip_serializing_if = "Option::is_none")]
     pub proximity_placement_group: Option<SubResource>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl AvailabilitySetProperties {
@@ -568,7 +586,11 @@ pub struct CapacityReservation {
     #[doc = "Describes a virtual machine scale set sku. NOTE: If the new VM SKU is not supported on the hardware the scale set is currently on, you need to deallocate the VMs in the scale set before you modify the SKU name."]
     pub sku: Sku,
     #[doc = "Availability Zone to use for this capacity reservation. The zone has to be single value and also should be part for the list of zones specified during the capacity reservation group creation. The zone can be assigned only during creation. If not provided, the reservation supports only non-zonal deployments. If provided, enforces VM/VMSS using this capacity reservation to be in same zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl CapacityReservation {
@@ -590,7 +612,11 @@ pub struct CapacityReservationGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<CapacityReservationGroupProperties>,
     #[doc = "Availability Zones to use for this capacity reservation group. The zones can be assigned only during creation. If not provided, the group supports only regional resources in the region. If provided, enforces each capacity reservation in the group to be in one of the zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl CapacityReservationGroup {
@@ -605,7 +631,12 @@ impl CapacityReservationGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityReservationGroupInstanceView {
     #[doc = "List of instance view of the capacity reservations under the capacity reservation group."]
-    #[serde(rename = "capacityReservations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "capacityReservations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capacity_reservations: Vec<CapacityReservationInstanceViewWithName>,
 }
 impl CapacityReservationGroupInstanceView {
@@ -637,10 +668,20 @@ impl CapacityReservationGroupListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityReservationGroupProperties {
     #[doc = "A list of all capacity reservation resource ids that belong to capacity reservation group."]
-    #[serde(rename = "capacityReservations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "capacityReservations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capacity_reservations: Vec<SubResourceReadOnly>,
     #[doc = "A list of references to all virtual machines associated to the capacity reservation group."]
-    #[serde(rename = "virtualMachinesAssociated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachinesAssociated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines_associated: Vec<SubResourceReadOnly>,
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<CapacityReservationGroupInstanceView>,
@@ -671,7 +712,11 @@ pub struct CapacityReservationInstanceView {
     #[serde(rename = "utilizationInfo", default, skip_serializing_if = "Option::is_none")]
     pub utilization_info: Option<CapacityReservationUtilization>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl CapacityReservationInstanceView {
@@ -731,7 +776,12 @@ pub struct CapacityReservationProperties {
     #[serde(rename = "reservationId", default, skip_serializing_if = "Option::is_none")]
     pub reservation_id: Option<String>,
     #[doc = "A list of all virtual machine resource ids that are associated with the capacity reservation."]
-    #[serde(rename = "virtualMachinesAssociated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachinesAssociated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines_associated: Vec<SubResourceReadOnly>,
     #[doc = "The date time when the capacity reservation was last updated."]
     #[serde(rename = "provisioningTime", default, with = "azure_core::date::rfc3339::option")]
@@ -772,7 +822,12 @@ impl CapacityReservationUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityReservationUtilization {
     #[doc = "A list of all virtual machines resource ids allocated against the capacity reservation."]
-    #[serde(rename = "virtualMachinesAllocated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachinesAllocated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines_allocated: Vec<SubResourceReadOnly>,
 }
 impl CapacityReservationUtilization {
@@ -835,7 +890,11 @@ impl CloudService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceExtensionProfile {
     #[doc = "List of extensions for the cloud service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<Extension>,
 }
 impl CloudServiceExtensionProfile {
@@ -873,7 +932,12 @@ pub struct CloudServiceExtensionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "Optional list of roles to apply this extension. If property is not specified or '*' is specified, extension is applied to all roles in the cloud service."]
-    #[serde(rename = "rolesAppliedTo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rolesAppliedTo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles_applied_to: Vec<String>,
 }
 impl CloudServiceExtensionProperties {
@@ -891,9 +955,18 @@ pub struct CloudServiceInstanceView {
     #[serde(rename = "sdkVersion", default, skip_serializing_if = "Option::is_none")]
     pub sdk_version: Option<String>,
     #[doc = "Specifies a list of unique identifiers generated internally for the cloud service. <br /><br /> NOTE: If you are using Azure Diagnostics extension, this property can be used as 'DeploymentId' for querying details."]
-    #[serde(rename = "privateIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ids: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceInstanceViewStatus>,
 }
 impl CloudServiceInstanceView {
@@ -922,7 +995,12 @@ impl CloudServiceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceNetworkProfile {
     #[doc = "List of Load balancer configurations. Cloud service can have up to two load balancer configurations, corresponding to a Public Load Balancer and an Internal Load Balancer."]
-    #[serde(rename = "loadBalancerConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_configurations: Vec<LoadBalancerConfiguration>,
     #[serde(rename = "swappableCloudService", default, skip_serializing_if = "Option::is_none")]
     pub swappable_cloud_service: Option<SubResource>,
@@ -936,7 +1014,11 @@ impl CloudServiceNetworkProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceOsProfile {
     #[doc = "Specifies set of certificates that should be installed onto the role instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<CloudServiceVaultSecretGroup>,
 }
 impl CloudServiceOsProfile {
@@ -1037,7 +1119,11 @@ impl CloudServiceRoleListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceRoleProfile {
     #[doc = "List of roles for the cloud service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<CloudServiceRoleProfileProperties>,
 }
 impl CloudServiceRoleProfile {
@@ -1170,7 +1256,12 @@ pub struct CloudServiceVaultSecretGroup {
     #[serde(rename = "sourceVault", default, skip_serializing_if = "Option::is_none")]
     pub source_vault: Option<SubResource>,
     #[doc = "The list of key vault references in SourceVault which contain certificates."]
-    #[serde(rename = "vaultCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_certificates: Vec<CloudServiceVaultCertificate>,
 }
 impl CloudServiceVaultSecretGroup {
@@ -1259,7 +1350,11 @@ pub struct CommunityGalleryImageProperties {
     #[serde(rename = "hyperVGeneration", default, skip_serializing_if = "Option::is_none")]
     pub hyper_v_generation: Option<community_gallery_image_properties::HyperVGeneration>,
     #[doc = "A list of gallery image features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<GalleryImageFeature>,
     #[doc = "Describes the gallery image definition purchase plan. This is used by marketplace images."]
     #[serde(rename = "purchasePlan", default, skip_serializing_if = "Option::is_none")]
@@ -1422,7 +1517,12 @@ pub struct CommunityGalleryInfo {
     #[serde(rename = "communityGalleryEnabled", default, skip_serializing_if = "Option::is_none")]
     pub community_gallery_enabled: Option<bool>,
     #[doc = "Community gallery public name list."]
-    #[serde(rename = "publicNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_names: Vec<String>,
 }
 impl CommunityGalleryInfo {
@@ -1434,7 +1534,11 @@ impl CommunityGalleryInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeOperationListResult {
     #[doc = "The list of compute operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputeOperationValue>,
 }
 impl azure_core::Continuable for ComputeOperationListResult {
@@ -1854,7 +1958,12 @@ impl DedicatedHostAllocatableVm {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedHostAvailableCapacity {
     #[doc = "The unutilized capacity of the dedicated host represented in terms of each VM size that is allowed to be deployed to the dedicated host."]
-    #[serde(rename = "allocatableVMs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allocatableVMs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allocatable_v_ms: Vec<DedicatedHostAllocatableVm>,
 }
 impl DedicatedHostAvailableCapacity {
@@ -1871,7 +1980,11 @@ pub struct DedicatedHostGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<DedicatedHostGroupProperties>,
     #[doc = "Availability Zone to use for this host group. Only single zone is supported. The zone can be assigned only during creation. If not provided, the group supports all zones in the region. If provided, enforces each host in the group to be in the same zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl DedicatedHostGroup {
@@ -1886,7 +1999,11 @@ impl DedicatedHostGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedHostGroupInstanceView {
     #[doc = "List of instance view of the dedicated hosts under the dedicated host group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosts: Vec<DedicatedHostInstanceViewWithName>,
 }
 impl DedicatedHostGroupInstanceView {
@@ -1921,7 +2038,11 @@ pub struct DedicatedHostGroupProperties {
     #[serde(rename = "platformFaultDomainCount")]
     pub platform_fault_domain_count: i32,
     #[doc = "A list of references to all dedicated hosts in the dedicated host group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosts: Vec<SubResourceReadOnly>,
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<DedicatedHostGroupInstanceView>,
@@ -1967,7 +2088,11 @@ pub struct DedicatedHostGroupUpdate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<DedicatedHostGroupProperties>,
     #[doc = "Availability Zone to use for this host group. Only single zone is supported. The zone can be assigned only during creation. If not provided, the group supports all zones in the region. If provided, enforces each host in the group to be in the same zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl DedicatedHostGroupUpdate {
@@ -1985,7 +2110,11 @@ pub struct DedicatedHostInstanceView {
     #[serde(rename = "availableCapacity", default, skip_serializing_if = "Option::is_none")]
     pub available_capacity: Option<DedicatedHostAvailableCapacity>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl DedicatedHostInstanceView {
@@ -2049,7 +2178,12 @@ pub struct DedicatedHostProperties {
     #[serde(rename = "hostId", default, skip_serializing_if = "Option::is_none")]
     pub host_id: Option<String>,
     #[doc = "A list of references to all virtual machines in the Dedicated Host."]
-    #[serde(rename = "virtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines: Vec<SubResourceReadOnly>,
     #[doc = "Specifies the software license type that will be applied to the VMs deployed on the dedicated host. <br><br> Possible values are: <br><br> **None** <br><br> **Windows_Server_Hybrid** <br><br> **Windows_Server_Perpetual** <br><br> Default: **None**"]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -2261,7 +2395,12 @@ impl DiffDiskSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Disallowed {
     #[doc = "A list of disk types."]
-    #[serde(rename = "diskTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_types: Vec<String>,
 }
 impl Disallowed {
@@ -2330,13 +2469,22 @@ pub struct Disk {
     #[serde(rename = "managedBy", default, skip_serializing_if = "Option::is_none")]
     pub managed_by: Option<String>,
     #[doc = "List of relative URIs containing the IDs of the VMs that have the disk attached. maxShares should be set to a value greater than one for disks to allow attaching them to multiple VMs."]
-    #[serde(rename = "managedByExtended", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedByExtended",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_by_extended: Vec<String>,
     #[doc = "The disks sku name. Can be Standard_LRS, Premium_LRS, StandardSSD_LRS, UltraSSD_LRS, Premium_ZRS, StandardSSD_ZRS, or PremiumV2_LRS."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<DiskSku>,
     #[doc = "The Logical zone list for Disk."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The complex type of the extended location."]
     #[serde(rename = "extendedLocation", default, skip_serializing_if = "Option::is_none")]
@@ -2401,7 +2549,12 @@ impl DiskAccessList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskAccessProperties {
     #[doc = "A readonly collection of private endpoint connections created on the disk. Currently only one endpoint connection is supported."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The disk access resource provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2599,10 +2752,19 @@ pub struct DiskInstanceView {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Specifies the encryption settings for the OS Disk. <br><br> Minimum api-version: 2015-06-15"]
-    #[serde(rename = "encryptionSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "encryptionSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub encryption_settings: Vec<DiskEncryptionSettings>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl DiskInstanceView {
@@ -2688,7 +2850,12 @@ pub struct DiskProperties {
     #[serde(rename = "maxShares", default, skip_serializing_if = "Option::is_none")]
     pub max_shares: Option<i32>,
     #[doc = "Details of the list of all VMs that have the disk attached. maxShares should be set to a value greater than one for disks to allow attaching them to multiple VMs."]
-    #[serde(rename = "shareInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_info: Vec<ShareInfoElement>,
     #[doc = "Policy for accessing the disk via network."]
     #[serde(rename = "networkAccessPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -3275,7 +3442,12 @@ pub struct EncryptionImages {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<OsDiskImageEncryption>,
     #[doc = "A list of encryption specifications for data disk images."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<DataDiskImageEncryption>,
 }
 impl EncryptionImages {
@@ -3358,7 +3530,12 @@ pub struct EncryptionSetProperties {
     #[serde(rename = "activeKey", default, skip_serializing_if = "Option::is_none")]
     pub active_key: Option<KeyForDiskEncryptionSet>,
     #[doc = "A readonly collection of key vault keys previously used by this disk encryption set while a key rotation is in progress. It will be empty if there is no ongoing key rotation."]
-    #[serde(rename = "previousKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "previousKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub previous_keys: Vec<KeyForDiskEncryptionSet>,
     #[doc = "The disk encryption set provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3387,7 +3564,12 @@ pub struct EncryptionSettingsCollection {
     #[doc = "Set this flag to true and provide DiskEncryptionKey and optional KeyEncryptionKey to enable encryption. Set this flag to false and remove DiskEncryptionKey and KeyEncryptionKey to disable encryption. If EncryptionSettings is null in the request object, the existing settings remain unchanged."]
     pub enabled: bool,
     #[doc = "A collection of encryption settings, one for each disk volume."]
-    #[serde(rename = "encryptionSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "encryptionSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub encryption_settings: Vec<EncryptionSettingsElement>,
     #[doc = "Describes what type of encryption is used for the disks. Once this field is set, it cannot be overwritten. '1.0' corresponds to Azure Disk Encryption with AAD app.'1.1' corresponds to Azure Disk Encryption."]
     #[serde(rename = "encryptionSettingsVersion", default, skip_serializing_if = "Option::is_none")]
@@ -3746,7 +3928,12 @@ impl GalleryApplicationVersionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GalleryArtifactPublishingProfileBase {
     #[doc = "The target regions where the Image Version is going to be replicated to. This property is updatable."]
-    #[serde(rename = "targetRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_regions: Vec<TargetRegion>,
     #[doc = "The number of replicas of the Image Version to be created per region. This property would take effect for a region when regionalReplicaCount is not specified. This property is updatable."]
     #[serde(rename = "replicaCount", default, skip_serializing_if = "Option::is_none")]
@@ -3767,7 +3954,12 @@ pub struct GalleryArtifactPublishingProfileBase {
     #[serde(rename = "replicationMode", default, skip_serializing_if = "Option::is_none")]
     pub replication_mode: Option<gallery_artifact_publishing_profile_base::ReplicationMode>,
     #[doc = "The target extended locations where the Image Version is going to be replicated to. This property is updatable."]
-    #[serde(rename = "targetExtendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetExtendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_extended_locations: Vec<GalleryTargetExtendedLocation>,
 }
 impl GalleryArtifactPublishingProfileBase {
@@ -4100,7 +4292,11 @@ pub struct GalleryImageProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<GalleryProvisioningState>,
     #[doc = "A list of gallery image features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<GalleryImageFeature>,
     #[doc = "The architecture of the image. Applicable to OS disks only."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4281,7 +4477,12 @@ pub struct GalleryImageVersionStorageProfile {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<GalleryOsDiskImage>,
     #[doc = "A list of data disk images."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<GalleryDataDiskImage>,
 }
 impl GalleryImageVersionStorageProfile {
@@ -5364,7 +5565,12 @@ pub struct ImageStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<ImageOsDisk>,
     #[doc = "Specifies the parameters that are used to add a data disk to a virtual machine. <br><br> For more information about disks, see [About disks and VHDs for Azure virtual machines](https://docs.microsoft.com/azure/virtual-machines/managed-disks-overview)."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<ImageDataDisk>,
     #[doc = "Specifies whether an image is zone resilient or not. Default is false. Zone resilient images can be created only in regions that provide Zone Redundant Storage (ZRS)."]
     #[serde(rename = "zoneResilient", default, skip_serializing_if = "Option::is_none")]
@@ -5455,7 +5661,12 @@ pub mod instance_view_status {
 #[doc = "Instance view statuses."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstanceViewStatusesSummary {
-    #[serde(rename = "statusesSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusesSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses_summary: Vec<StatusCodeCount>,
 }
 impl InstanceViewStatusesSummary {
@@ -5652,13 +5863,28 @@ impl LinuxConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinuxParameters {
     #[doc = "The update classifications to select when installing patches for Linux."]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
     #[doc = "packages to include in the patch operation. Format: packageName_packageVersion"]
-    #[serde(rename = "packageNameMasksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_include: Vec<String>,
     #[doc = "packages to exclude in the patch operation. Format: packageName_packageVersion"]
-    #[serde(rename = "packageNameMasksToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_exclude: Vec<String>,
     #[doc = "This is used as a maintenance run identifier for Auto VM Guest Patching in Linux."]
     #[serde(rename = "maintenanceRunId", default, skip_serializing_if = "Option::is_none")]
@@ -6150,13 +6376,23 @@ pub mod network_interface_reference_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfile {
     #[doc = "Specifies the list of resource Ids for the network interfaces associated with the virtual machine."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterfaceReference>,
     #[doc = "specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations"]
     #[serde(rename = "networkApiVersion", default, skip_serializing_if = "Option::is_none")]
     pub network_api_version: Option<network_profile::NetworkApiVersion>,
     #[doc = "Specifies the networking configurations that will be used to create the virtual machine networking resources."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineNetworkInterfaceConfiguration>,
 }
 impl NetworkProfile {
@@ -6416,7 +6652,11 @@ pub struct OsFamilyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "List of OS versions belonging to this family."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub versions: Vec<OsVersionPropertiesBase>,
 }
 impl OsFamilyProperties {
@@ -6446,7 +6686,11 @@ pub struct OsProfile {
     #[serde(rename = "linuxConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub linux_configuration: Option<LinuxConfiguration>,
     #[doc = "Specifies set of certificates that should be installed onto the virtual machine. To install certificates on a virtual machine it is recommended to use the [Azure Key Vault virtual machine extension for Linux](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-linux) or the [Azure Key Vault virtual machine extension for Windows](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-windows)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<VaultSecretGroup>,
     #[doc = "Specifies whether extension operations should be allowed on the virtual machine. <br><br>This may only be set to False when no extensions are present on the virtual machine."]
     #[serde(rename = "allowExtensionOperations", default, skip_serializing_if = "Option::is_none")]
@@ -6783,7 +7027,11 @@ pub struct PatchInstallationDetail {
     #[serde(rename = "kbId", default, skip_serializing_if = "Option::is_none")]
     pub kb_id: Option<String>,
     #[doc = "The classification(s) of the patch as provided by the patch publisher."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications: Vec<String>,
     #[doc = "The state of the patch after the installation operation completed."]
     #[serde(rename = "installationState", default, skip_serializing_if = "Option::is_none")]
@@ -7051,7 +7299,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The uri to fetch the next page of snapshots. Call ListNext() with this to fetch the next page of snapshots."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7195,7 +7447,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -7210,10 +7466,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -7260,7 +7526,11 @@ pub struct ProximityPlacementGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<ProximityPlacementGroupProperties>,
     #[doc = "Specifies the Availability Zone where virtual machine, virtual machine scale set or availability set associated with the  proximity placement group can be created."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ProximityPlacementGroup {
@@ -7299,13 +7569,28 @@ pub struct ProximityPlacementGroupProperties {
     #[serde(rename = "proximityPlacementGroupType", default, skip_serializing_if = "Option::is_none")]
     pub proximity_placement_group_type: Option<proximity_placement_group_properties::ProximityPlacementGroupType>,
     #[doc = "A list of references to all virtual machines in the proximity placement group."]
-    #[serde(rename = "virtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines: Vec<SubResourceWithColocationStatus>,
     #[doc = "A list of references to all virtual machine scale sets in the proximity placement group."]
-    #[serde(rename = "virtualMachineScaleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachineScaleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machine_scale_sets: Vec<SubResourceWithColocationStatus>,
     #[doc = "A list of references to all availability sets in the proximity placement group."]
-    #[serde(rename = "availabilitySets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilitySets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_sets: Vec<SubResourceWithColocationStatus>,
     #[doc = "Instance view status."]
     #[serde(rename = "colocationStatus", default, skip_serializing_if = "Option::is_none")]
@@ -7362,7 +7647,12 @@ pub mod proximity_placement_group_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Intent {
         #[doc = "Specifies possible sizes of virtual machines that can be created in the proximity placement group."]
-        #[serde(rename = "vmSizes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "vmSizes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub vm_sizes: Vec<String>,
     }
     impl Intent {
@@ -7682,7 +7972,11 @@ pub struct ReplicationStatus {
     #[serde(rename = "aggregatedState", default, skip_serializing_if = "Option::is_none")]
     pub aggregated_state: Option<replication_status::AggregatedState>,
     #[doc = "This is a summary of replication status for each region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub summary: Vec<RegionalReplicationStatus>,
 }
 impl ReplicationStatus {
@@ -7865,22 +8159,48 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<ResourceSkuCapacity>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "A list of locations and availability zones in those locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "The api versions that support this SKU."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Metadata for retrieving price info."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<ResourceSkuCosts>,
     #[doc = "A name value pair to describe the capability."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -7959,13 +8279,27 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "List of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ResourceSkuZoneDetails>,
     #[doc = "The names of extended locations."]
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<String>,
     #[doc = "The type of the extended location."]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
@@ -8018,10 +8352,18 @@ pub mod resource_sku_location_info {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuRestrictionInfo {
     #[doc = "Locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "List of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuRestrictionInfo {
@@ -8036,7 +8378,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Describes an available Compute SKU Restriction Information."]
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
@@ -8069,10 +8415,18 @@ pub mod resource_sku_restrictions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuZoneDetails {
     #[doc = "The set of zones that the SKU is available in with the specified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
     #[doc = "A list of capabilities that are available for the SKU in the specified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
 }
 impl ResourceSkuZoneDetails {
@@ -8179,7 +8533,11 @@ impl RestorePointCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointCollectionListResult {
     #[doc = "Gets the list of restore point collections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorePointCollection>,
     #[doc = "The uri to fetch the next page of RestorePointCollections. Call ListNext() with this to fetch the next page of RestorePointCollections"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8209,7 +8567,12 @@ pub struct RestorePointCollectionProperties {
     #[serde(rename = "restorePointCollectionId", default, skip_serializing_if = "Option::is_none")]
     pub restore_point_collection_id: Option<String>,
     #[doc = "A list containing all restore points created under this restore point collection."]
-    #[serde(rename = "restorePoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restorePoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_points: Vec<RestorePoint>,
 }
 impl RestorePointCollectionProperties {
@@ -8250,10 +8613,19 @@ impl RestorePointCollectionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointInstanceView {
     #[doc = "The disk restore points information."]
-    #[serde(rename = "diskRestorePoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskRestorePoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_restore_points: Vec<DiskRestorePointInstanceView>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl RestorePointInstanceView {
@@ -8265,7 +8637,12 @@ impl RestorePointInstanceView {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointProperties {
     #[doc = "List of disk resource ids that the customer wishes to exclude from the restore point. If no disks are specified, all disks will be included."]
-    #[serde(rename = "excludeDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludeDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude_disks: Vec<ApiEntityReference>,
     #[doc = "Describes the properties of the Virtual Machine for which the restore point was created. The properties provided are a subset and the snapshot of the overall Virtual Machine properties captured at the time of the restore point creation."]
     #[serde(rename = "sourceMetadata", default, skip_serializing_if = "Option::is_none")]
@@ -8470,7 +8847,12 @@ pub struct RestorePointSourceVmStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<RestorePointSourceVmosDisk>,
     #[doc = "Gets the data disks of the VM captured at the time of the restore point creation."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<RestorePointSourceVmDataDisk>,
 }
 impl RestorePointSourceVmStorageProfile {
@@ -8532,7 +8914,11 @@ pub struct RoleInstanceInstanceView {
     #[doc = "Specifies a unique identifier generated internally for the cloud service associated with this role instance. <br /><br /> NOTE: If you are using Azure Diagnostics extension, this property can be used as 'DeploymentId' for querying details."]
     #[serde(rename = "privateId", default, skip_serializing_if = "Option::is_none")]
     pub private_id: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceInstanceViewStatus>,
 }
 impl RoleInstanceInstanceView {
@@ -8561,7 +8947,12 @@ impl RoleInstanceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleInstanceNetworkProfile {
     #[doc = "Specifies the list of resource Ids for the network interfaces associated with the role instance."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<SubResource>,
 }
 impl RoleInstanceNetworkProfile {
@@ -8745,7 +9136,11 @@ pub struct RunCommandDocument {
     #[doc = "The script to be executed."]
     pub script: Vec<String>,
     #[doc = "The parameters used by the script."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<RunCommandParameterDefinition>,
 }
 impl RunCommandDocument {
@@ -8800,10 +9195,18 @@ pub struct RunCommandInput {
     #[serde(rename = "commandId")]
     pub command_id: String,
     #[doc = "Optional. The script to be executed.  When this value is given, the given script will override the default script of the command."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub script: Vec<String>,
     #[doc = "The run command parameters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<RunCommandInputParameter>,
 }
 impl RunCommandInput {
@@ -8876,7 +9279,11 @@ impl RunCommandParameterDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunCommandResult {
     #[doc = "Run command operation response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InstanceViewStatus>,
 }
 impl RunCommandResult {
@@ -8888,7 +9295,11 @@ impl RunCommandResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScaleInPolicy {
     #[doc = "The rules to be followed when scaling-in a virtual machine scale set. <br><br> Possible values are: <br><br> **Default** When a virtual machine scale set is scaled in, the scale set will first be balanced across zones if it is a zonal scale set. Then, it will be balanced across Fault Domains as far as possible. Within each Fault Domain, the virtual machines chosen for removal will be the newest ones that are not protected from scale-in. <br><br> **OldestVM** When a virtual machine scale set is being scaled-in, the oldest virtual machines that are not protected from scale-in will be chosen for removal. For zonal virtual machine scale sets, the scale set will first be balanced across zones. Within each zone, the oldest virtual machines that are not protected will be chosen for removal. <br><br> **NewestVM** When a virtual machine scale set is being scaled-in, the newest virtual machines that are not protected from scale-in will be chosen for removal. For zonal virtual machine scale sets, the scale set will first be balanced across zones. Within each zone, the newest virtual machines that are not protected will be chosen for removal. <br><br>"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<String>,
     #[doc = "This property allows you to specify if virtual machines chosen for removal have to be force deleted when a virtual machine scale set is being scaled-in.(Feature in Preview)"]
     #[serde(rename = "forceDeletion", default, skip_serializing_if = "Option::is_none")]
@@ -9133,7 +9544,11 @@ pub struct SharedGalleryImageProperties {
     #[serde(rename = "hyperVGeneration", default, skip_serializing_if = "Option::is_none")]
     pub hyper_v_generation: Option<shared_gallery_image_properties::HyperVGeneration>,
     #[doc = "A list of gallery image features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<GalleryImageFeature>,
     #[doc = "Describes the gallery image definition purchase plan. This is used by marketplace images."]
     #[serde(rename = "purchasePlan", default, skip_serializing_if = "Option::is_none")]
@@ -9276,7 +9691,12 @@ pub struct SharedGalleryImageVersionStorageProfile {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<SharedGalleryOsDiskImage>,
     #[doc = "A list of data disk images."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<SharedGalleryDataDiskImage>,
 }
 impl SharedGalleryImageVersionStorageProfile {
@@ -9322,7 +9742,11 @@ pub struct SharingProfile {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub permissions: Option<sharing_profile::Permissions>,
     #[doc = "A list of sharing profile groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<SharingProfileGroup>,
     #[doc = "Information of community gallery if current gallery is shared to community"]
     #[serde(rename = "communityGalleryInfo", default, skip_serializing_if = "Option::is_none")]
@@ -9382,7 +9806,11 @@ pub struct SharingProfileGroup {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<sharing_profile_group::Type>,
     #[doc = "A list of subscription/tenant ids the gallery is aimed to be shared to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ids: Vec<String>,
 }
 impl SharingProfileGroup {
@@ -9479,7 +9907,11 @@ pub struct SharingStatus {
     #[serde(rename = "aggregatedState", default, skip_serializing_if = "Option::is_none")]
     pub aggregated_state: Option<SharingState>,
     #[doc = "Summary of all regional sharing status."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub summary: Vec<RegionalSharingStatus>,
 }
 impl SharingStatus {
@@ -9494,7 +9926,11 @@ pub struct SharingUpdate {
     #[serde(rename = "operationType")]
     pub operation_type: sharing_update::OperationType,
     #[doc = "A list of sharing profile groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<SharingProfileGroup>,
 }
 impl SharingUpdate {
@@ -9929,7 +10365,12 @@ impl SpotRestorePolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SshConfiguration {
     #[doc = "The list of SSH public keys used to authenticate with linux based VMs."]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<SshPublicKey>,
 }
 impl SshConfiguration {
@@ -10114,7 +10555,12 @@ pub struct StorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
     #[doc = "Specifies the parameters that are used to add a data disk to a virtual machine. <br><br> For more information about disks, see [About disks and VHDs for Azure virtual machines](https://docs.microsoft.com/azure/virtual-machines/managed-disks-overview)."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
 }
 impl StorageProfile {
@@ -10744,7 +11190,12 @@ pub struct VaultSecretGroup {
     #[serde(rename = "sourceVault", default, skip_serializing_if = "Option::is_none")]
     pub source_vault: Option<SubResource>,
     #[doc = "The list of key vault references in SourceVault which contain certificates."]
-    #[serde(rename = "vaultCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_certificates: Vec<VaultCertificate>,
 }
 impl VaultSecretGroup {
@@ -10776,13 +11227,21 @@ pub struct VirtualMachine {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<VirtualMachineProperties>,
     #[doc = "The virtual machine child extension resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<VirtualMachineExtension>,
     #[doc = "Identity for the virtual machine."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<VirtualMachineIdentity>,
     #[doc = "The virtual machine zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The complex type of the extended location."]
     #[serde(rename = "extendedLocation", default, skip_serializing_if = "Option::is_none")]
@@ -10808,10 +11267,19 @@ pub struct VirtualMachineAgentInstanceView {
     #[serde(rename = "vmAgentVersion", default, skip_serializing_if = "Option::is_none")]
     pub vm_agent_version: Option<String>,
     #[doc = "The virtual machine extension handler instance view."]
-    #[serde(rename = "extensionHandlers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extensionHandlers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extension_handlers: Vec<VirtualMachineExtensionHandlerInstanceView>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachineAgentInstanceView {
@@ -10841,7 +11309,12 @@ pub struct VirtualMachineAssessPatchesResult {
     #[serde(rename = "startDateTime", default, with = "azure_core::date::rfc3339::option")]
     pub start_date_time: Option<time::OffsetDateTime>,
     #[doc = "The list of patches that have been detected as available for installation."]
-    #[serde(rename = "availablePatches", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availablePatches",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_patches: Vec<VirtualMachineSoftwarePatchProperties>,
     #[doc = "Api error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10935,7 +11408,11 @@ pub struct VirtualMachineCaptureResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<serde_json::Value>,
     #[doc = "a list of resource items of the captured virtual machine"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<serde_json::Value>,
 }
 impl VirtualMachineCaptureResult {
@@ -11035,10 +11512,18 @@ pub struct VirtualMachineExtensionInstanceView {
     #[serde(rename = "typeHandlerVersion", default, skip_serializing_if = "Option::is_none")]
     pub type_handler_version: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub substatuses: Vec<InstanceViewStatus>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachineExtensionInstanceView {
@@ -11148,7 +11633,11 @@ impl VirtualMachineExtensionUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineExtensionsListResult {
     #[doc = "The list of extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineExtension>,
 }
 impl VirtualMachineExtensionsListResult {
@@ -11242,7 +11731,12 @@ pub struct VirtualMachineImageProperties {
     #[doc = "Contains the os disk image information."]
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<OsDiskImage>,
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<DataDiskImage>,
     #[doc = "Describes automatic OS upgrade properties on the image."]
     #[serde(rename = "automaticOSUpgradeProperties", default, skip_serializing_if = "Option::is_none")]
@@ -11253,7 +11747,11 @@ pub struct VirtualMachineImageProperties {
     #[doc = "Specifies the disallowed configuration for a virtual machine image."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub disallowed: Option<DisallowedConfiguration>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<VirtualMachineImageFeature>,
     #[doc = "Specifies the Architecture Type"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11390,7 +11888,11 @@ pub struct VirtualMachineInstallPatchesResult {
     #[serde(rename = "failedPatchCount", default, skip_serializing_if = "Option::is_none")]
     pub failed_patch_count: Option<i32>,
     #[doc = "The patches that were installed during the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub patches: Vec<PatchInstallationDetail>,
     #[doc = "The UTC timestamp when the operation began."]
     #[serde(rename = "startDateTime", default, with = "azure_core::date::rfc3339::option")]
@@ -11526,10 +12028,18 @@ pub struct VirtualMachineInstanceView {
     #[serde(rename = "maintenanceRedeployStatus", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_redeploy_status: Option<MaintenanceRedeployStatus>,
     #[doc = "The virtual machine disk information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<DiskInstanceView>,
     #[doc = "The extensions information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineExtensionInstanceView>,
     #[doc = "The health status of the VM."]
     #[serde(rename = "vmHealth", default, skip_serializing_if = "Option::is_none")]
@@ -11541,7 +12051,11 @@ pub struct VirtualMachineInstanceView {
     #[serde(rename = "assignedHost", default, skip_serializing_if = "Option::is_none")]
     pub assigned_host: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "The status of virtual machine patch operations."]
     #[serde(rename = "patchStatus", default, skip_serializing_if = "Option::is_none")]
@@ -11729,7 +12243,12 @@ pub mod virtual_machine_network_interface_configuration_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineNetworkInterfaceDnsSettingsConfiguration {
     #[doc = "List of DNS servers IP addresses"]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl VirtualMachineNetworkInterfaceDnsSettingsConfiguration {
@@ -11766,13 +12285,28 @@ pub struct VirtualMachineNetworkInterfaceIpConfigurationProperties {
     #[serde(rename = "privateIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub private_ip_address_version: Option<virtual_machine_network_interface_ip_configuration_properties::PrivateIpAddressVersion>,
     #[doc = "Specifies an array of references to application security group."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<SubResource>,
     #[doc = "Specifies an array of references to backend address pools of application gateways. A virtual machine can reference backend address pools of multiple application gateways. Multiple virtual machines cannot use the same application gateway."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to backend address pools of load balancers. A virtual machine can reference backend address pools of one public and one internal load balancer. [Multiple virtual machines cannot use the same basic sku load balancer]."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<SubResource>,
 }
 impl VirtualMachineNetworkInterfaceIpConfigurationProperties {
@@ -11830,7 +12364,12 @@ pub struct VirtualMachinePatchStatus {
     #[serde(rename = "lastPatchInstallationSummary", default, skip_serializing_if = "Option::is_none")]
     pub last_patch_installation_summary: Option<LastPatchInstallationSummary>,
     #[doc = "The enablement status of the specified patchMode"]
-    #[serde(rename = "configurationStatuses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configurationStatuses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configuration_statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachinePatchStatus {
@@ -11953,7 +12492,12 @@ pub struct VirtualMachinePublicIpAddressConfigurationProperties {
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
     pub dns_settings: Option<VirtualMachinePublicIpAddressDnsSettingsConfiguration>,
     #[doc = "The list of IP tags associated with the public IP address."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<VirtualMachineIpTag>,
     #[serde(rename = "publicIPPrefix", default, skip_serializing_if = "Option::is_none")]
     pub public_ip_prefix: Option<SubResource>,
@@ -12149,7 +12693,11 @@ pub struct VirtualMachineRunCommandInstanceView {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachineRunCommandInstanceView {
@@ -12214,10 +12762,19 @@ pub struct VirtualMachineRunCommandProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub source: Option<VirtualMachineRunCommandScriptSource>,
     #[doc = "The parameters used by the script."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<RunCommandInputParameter>,
     #[doc = "The parameters used by the script."]
-    #[serde(rename = "protectedParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_parameters: Vec<RunCommandInputParameter>,
     #[doc = "Optional. If set to true, provisioning will complete as soon as the script starts and will not wait for script to complete."]
     #[serde(rename = "asyncExecution", default, skip_serializing_if = "Option::is_none")]
@@ -12319,7 +12876,11 @@ pub struct VirtualMachineScaleSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<VirtualMachineScaleSetIdentity>,
     #[doc = "The virtual machine scale set zones. NOTE: Availability zones can only be set when you create the scale set"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The complex type of the extended location."]
     #[serde(rename = "extendedLocation", default, skip_serializing_if = "Option::is_none")]
@@ -12431,7 +12992,11 @@ impl VirtualMachineScaleSetExtensionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetExtensionProfile {
     #[doc = "The virtual machine scale set child extension resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineScaleSetExtension>,
     #[doc = "Specifies the time alloted for all extensions to start. The time duration should be between 15 minutes and 120 minutes (inclusive) and should be specified in ISO 8601 format. The default value is 90 minutes (PT1H30M). <br><br> Minimum api-version: 2020-06-01"]
     #[serde(rename = "extensionsTimeBudget", default, skip_serializing_if = "Option::is_none")]
@@ -12473,7 +13038,12 @@ pub struct VirtualMachineScaleSetExtensionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "Collection of extension names after which this extension needs to be provisioned."]
-    #[serde(rename = "provisionAfterExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisionAfterExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provision_after_extensions: Vec<String>,
     #[doc = "Indicates whether failures stemming from the extension will be suppressed (Operational failures such as not connecting to the VM will not be suppressed regardless of this value). The default is false."]
     #[serde(rename = "suppressFailures", default, skip_serializing_if = "Option::is_none")]
@@ -12555,16 +13125,36 @@ pub struct VirtualMachineScaleSetIpConfigurationProperties {
     #[serde(rename = "privateIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub private_ip_address_version: Option<virtual_machine_scale_set_ip_configuration_properties::PrivateIpAddressVersion>,
     #[doc = "Specifies an array of references to backend address pools of application gateways. A scale set can reference backend address pools of multiple application gateways. Multiple scale sets cannot use the same application gateway."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to application security group."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<SubResource>,
     #[doc = "Specifies an array of references to backend address pools of load balancers. A scale set can reference backend address pools of one public and one internal load balancer. Multiple scale sets cannot use the same basic sku load balancer."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to inbound Nat pools of the load balancers. A scale set can reference inbound nat pools of one public and one internal load balancer. Multiple scale sets cannot use the same basic sku load balancer."]
-    #[serde(rename = "loadBalancerInboundNatPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerInboundNatPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_inbound_nat_pools: Vec<SubResource>,
 }
 impl VirtualMachineScaleSetIpConfigurationProperties {
@@ -12652,13 +13242,26 @@ pub struct VirtualMachineScaleSetInstanceView {
     #[serde(rename = "virtualMachine", default, skip_serializing_if = "Option::is_none")]
     pub virtual_machine: Option<VirtualMachineScaleSetInstanceViewStatusesSummary>,
     #[doc = "The extensions information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineScaleSetVmExtensionsSummary>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "The orchestration services information."]
-    #[serde(rename = "orchestrationServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orchestrationServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub orchestration_services: Vec<OrchestrationServiceSummary>,
 }
 impl VirtualMachineScaleSetInstanceView {
@@ -12670,7 +13273,12 @@ impl VirtualMachineScaleSetInstanceView {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetInstanceViewStatusesSummary {
     #[doc = "The extensions information."]
-    #[serde(rename = "statusesSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusesSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses_summary: Vec<VirtualMachineStatusCodeCount>,
 }
 impl VirtualMachineScaleSetInstanceViewStatusesSummary {
@@ -12815,7 +13423,12 @@ impl VirtualMachineScaleSetNetworkConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetNetworkConfigurationDnsSettings {
     #[doc = "List of DNS servers IP addresses"]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl VirtualMachineScaleSetNetworkConfigurationDnsSettings {
@@ -12911,7 +13524,12 @@ pub struct VirtualMachineScaleSetNetworkProfile {
     #[serde(rename = "healthProbe", default, skip_serializing_if = "Option::is_none")]
     pub health_probe: Option<ApiEntityReference>,
     #[doc = "The list of network configurations."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineScaleSetNetworkConfiguration>,
     #[doc = "specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations for Virtual Machine Scale Set with orchestration mode 'Flexible'"]
     #[serde(rename = "networkApiVersion", default, skip_serializing_if = "Option::is_none")]
@@ -12989,7 +13607,12 @@ pub struct VirtualMachineScaleSetOsDisk {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub image: Option<VirtualHardDisk>,
     #[doc = "Specifies the container urls that are used to store operating system disks for the scale set."]
-    #[serde(rename = "vhdContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vhdContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vhd_containers: Vec<String>,
     #[doc = "Describes the parameters of a ScaleSet managed disk."]
     #[serde(rename = "managedDisk", default, skip_serializing_if = "Option::is_none")]
@@ -13046,7 +13669,11 @@ pub struct VirtualMachineScaleSetOsProfile {
     #[serde(rename = "linuxConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub linux_configuration: Option<LinuxConfiguration>,
     #[doc = "Specifies set of certificates that should be installed onto the virtual machines in the scale set. To install certificates on a virtual machine it is recommended to use the [Azure Key Vault virtual machine extension for Linux](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-linux) or the [Azure Key Vault virtual machine extension for Windows](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-windows)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<VaultSecretGroup>,
     #[doc = "Specifies whether extension operations should be allowed on the virtual machine scale set. <br><br>This may only be set to False when no extensions are present on the virtual machine scale set."]
     #[serde(rename = "allowExtensionOperations", default, skip_serializing_if = "Option::is_none")]
@@ -13162,7 +13789,12 @@ pub struct VirtualMachineScaleSetPublicIpAddressConfigurationProperties {
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
     pub dns_settings: Option<VirtualMachineScaleSetPublicIpAddressConfigurationDnsSettings>,
     #[doc = "The list of IP tags associated with the public IP address."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<VirtualMachineScaleSetIpTag>,
     #[serde(rename = "publicIPPrefix", default, skip_serializing_if = "Option::is_none")]
     pub public_ip_prefix: Option<SubResource>,
@@ -13261,7 +13893,12 @@ pub struct VirtualMachineScaleSetReimageParameters {
     #[serde(flatten)]
     pub virtual_machine_scale_set_vm_reimage_parameters: VirtualMachineScaleSetVmReimageParameters,
     #[doc = "The virtual machine scale set instance ids. Omitting the virtual machine scale set instance ids will result in the operation being performed on all virtual machines in the virtual machine scale set."]
-    #[serde(rename = "instanceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "instanceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instance_ids: Vec<String>,
 }
 impl VirtualMachineScaleSetReimageParameters {
@@ -13327,7 +13964,12 @@ pub struct VirtualMachineScaleSetStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<VirtualMachineScaleSetOsDisk>,
     #[doc = "Specifies the parameters that are used to add data disks to the virtual machines in the scale set. <br><br> For more information about disks, see [About disks and VHDs for Azure virtual machines](https://docs.microsoft.com/azure/virtual-machines/managed-disks-overview)."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<VirtualMachineScaleSetDataDisk>,
 }
 impl VirtualMachineScaleSetStorageProfile {
@@ -13391,16 +14033,36 @@ pub struct VirtualMachineScaleSetUpdateIpConfigurationProperties {
     #[serde(rename = "privateIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub private_ip_address_version: Option<virtual_machine_scale_set_update_ip_configuration_properties::PrivateIpAddressVersion>,
     #[doc = "The application gateway backend address pools."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to application security group."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<SubResource>,
     #[doc = "The load balancer backend address pools."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<SubResource>,
     #[doc = "The load balancer inbound nat pools."]
-    #[serde(rename = "loadBalancerInboundNatPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerInboundNatPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_inbound_nat_pools: Vec<SubResource>,
 }
 impl VirtualMachineScaleSetUpdateIpConfigurationProperties {
@@ -13483,7 +14145,12 @@ pub struct VirtualMachineScaleSetUpdateNetworkConfigurationProperties {
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
     pub dns_settings: Option<VirtualMachineScaleSetNetworkConfigurationDnsSettings>,
     #[doc = "The virtual machine scale set IP Configuration."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<VirtualMachineScaleSetUpdateIpConfiguration>,
     #[doc = "Whether IP forwarding enabled on this NIC."]
     #[serde(rename = "enableIPForwarding", default, skip_serializing_if = "Option::is_none")]
@@ -13544,7 +14211,12 @@ pub struct VirtualMachineScaleSetUpdateNetworkProfile {
     #[serde(rename = "healthProbe", default, skip_serializing_if = "Option::is_none")]
     pub health_probe: Option<ApiEntityReference>,
     #[doc = "The list of network configurations."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineScaleSetUpdateNetworkConfiguration>,
     #[doc = "specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations for Virtual Machine Scale Set with orchestration mode 'Flexible'"]
     #[serde(rename = "networkApiVersion", default, skip_serializing_if = "Option::is_none")]
@@ -13610,7 +14282,12 @@ pub struct VirtualMachineScaleSetUpdateOsDisk {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub image: Option<VirtualHardDisk>,
     #[doc = "The list of virtual hard disk container uris."]
-    #[serde(rename = "vhdContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vhdContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vhd_containers: Vec<String>,
     #[doc = "Describes the parameters of a ScaleSet managed disk."]
     #[serde(rename = "managedDisk", default, skip_serializing_if = "Option::is_none")]
@@ -13637,7 +14314,11 @@ pub struct VirtualMachineScaleSetUpdateOsProfile {
     #[serde(rename = "linuxConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub linux_configuration: Option<LinuxConfiguration>,
     #[doc = "The List of certificates for addition to the VM."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<VaultSecretGroup>,
 }
 impl VirtualMachineScaleSetUpdateOsProfile {
@@ -13769,7 +14450,12 @@ pub struct VirtualMachineScaleSetUpdateStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<VirtualMachineScaleSetUpdateOsDisk>,
     #[doc = "The data disks."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<VirtualMachineScaleSetDataDisk>,
 }
 impl VirtualMachineScaleSetUpdateStorageProfile {
@@ -13833,10 +14519,18 @@ pub struct VirtualMachineScaleSetVm {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub plan: Option<Plan>,
     #[doc = "The virtual machine child extension resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<VirtualMachineExtension>,
     #[doc = "The virtual machine zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Identity for the virtual machine."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -13900,7 +14594,11 @@ impl VirtualMachineScaleSetVmExtensionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetVmExtensionsListResult {
     #[doc = "The list of VMSS VM extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineScaleSetVmExtension>,
 }
 impl VirtualMachineScaleSetVmExtensionsListResult {
@@ -13915,7 +14613,12 @@ pub struct VirtualMachineScaleSetVmExtensionsSummary {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The extensions information."]
-    #[serde(rename = "statusesSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusesSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses_summary: Vec<VirtualMachineStatusCodeCount>,
 }
 impl VirtualMachineScaleSetVmExtensionsSummary {
@@ -13927,7 +14630,12 @@ impl VirtualMachineScaleSetVmExtensionsSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetVmInstanceIDs {
     #[doc = "The virtual machine scale set instance ids. Omitting the virtual machine scale set instance ids will result in the operation being performed on all virtual machines in the virtual machine scale set."]
-    #[serde(rename = "instanceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "instanceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instance_ids: Vec<String>,
 }
 impl VirtualMachineScaleSetVmInstanceIDs {
@@ -13966,10 +14674,18 @@ pub struct VirtualMachineScaleSetVmInstanceView {
     #[serde(rename = "maintenanceRedeployStatus", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_redeploy_status: Option<MaintenanceRedeployStatus>,
     #[doc = "The disks information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<DiskInstanceView>,
     #[doc = "The extensions information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineExtensionInstanceView>,
     #[doc = "The health status of the VM."]
     #[serde(rename = "vmHealth", default, skip_serializing_if = "Option::is_none")]
@@ -13978,7 +14694,11 @@ pub struct VirtualMachineScaleSetVmInstanceView {
     #[serde(rename = "bootDiagnostics", default, skip_serializing_if = "Option::is_none")]
     pub boot_diagnostics: Option<BootDiagnosticsInstanceView>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "Resource id of the dedicated host, on which the virtual machine is allocated through automatic placement, when the virtual machine is associated with a dedicated host group that has automatic placement enabled. <br><br>Minimum api-version: 2020-06-01."]
     #[serde(rename = "assignedHost", default, skip_serializing_if = "Option::is_none")]
@@ -14016,7 +14736,12 @@ impl VirtualMachineScaleSetVmListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetVmNetworkProfileConfiguration {
     #[doc = "The list of network configurations."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineScaleSetNetworkConfiguration>,
 }
 impl VirtualMachineScaleSetVmNetworkProfileConfiguration {
@@ -14193,7 +14918,11 @@ impl VirtualMachineSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineSizeListResult {
     #[doc = "The list of virtual machine sizes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineSize>,
 }
 impl azure_core::Continuable for VirtualMachineSizeListResult {
@@ -14223,7 +14952,11 @@ pub struct VirtualMachineSoftwarePatchProperties {
     #[serde(rename = "kbId", default, skip_serializing_if = "Option::is_none")]
     pub kb_id: Option<String>,
     #[doc = "The classification(s) of the patch as provided by the patch publisher."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications: Vec<String>,
     #[doc = "Describes the reboot requirements of the patch."]
     #[serde(rename = "rebootBehavior", default, skip_serializing_if = "Option::is_none")]
@@ -14357,7 +15090,11 @@ pub struct VirtualMachineUpdate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<VirtualMachineIdentity>,
     #[doc = "The virtual machine zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl VirtualMachineUpdate {
@@ -14369,7 +15106,11 @@ impl VirtualMachineUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmImagesInEdgeZoneListResult {
     #[doc = "The list of VMImages in EdgeZone"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineImageResource>,
     #[doc = "The URI to fetch the next page of VMImages in EdgeZone. Call ListNext() with this URI to fetch the next page of VmImages."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14384,7 +15125,11 @@ impl VmImagesInEdgeZoneListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WinRmConfiguration {
     #[doc = "The list of Windows Remote Management listeners"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub listeners: Vec<WinRmListener>,
 }
 impl WinRmConfiguration {
@@ -14429,7 +15174,12 @@ pub struct WindowsConfiguration {
     #[serde(rename = "timeZone", default, skip_serializing_if = "Option::is_none")]
     pub time_zone: Option<String>,
     #[doc = "Specifies additional base-64 encoded XML formatted information that can be included in the Unattend.xml file, which is used by Windows Setup."]
-    #[serde(rename = "additionalUnattendContent", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalUnattendContent",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_unattend_content: Vec<AdditionalUnattendContent>,
     #[doc = "Specifies settings related to VM Guest Patching on Windows."]
     #[serde(rename = "patchSettings", default, skip_serializing_if = "Option::is_none")]
@@ -14447,13 +15197,28 @@ impl WindowsConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WindowsParameters {
     #[doc = "The update classifications to select when installing patches for Windows."]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
     #[doc = "Kbs to include in the patch operation"]
-    #[serde(rename = "kbNumbersToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_include: Vec<String>,
     #[doc = "Kbs to exclude in the patch operation"]
-    #[serde(rename = "kbNumbersToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_exclude: Vec<String>,
     #[doc = "Filters out Kbs that don't have an InstallationRebootBehavior of 'NeverReboots' when this is set to true."]
     #[serde(rename = "excludeKbsRequiringReboot", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/compute/src/package_2022_04_04/models.rs b/services/mgmt/compute/src/package_2022_04_04/models.rs
index c5e1aa0f03..12e931937a 100644
--- a/services/mgmt/compute/src/package_2022_04_04/models.rs
+++ b/services/mgmt/compute/src/package_2022_04_04/models.rs
@@ -90,7 +90,11 @@ impl ApiEntityReference {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiError {
     #[doc = "The Api error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ApiErrorBase>,
     #[doc = "Inner error details."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -132,7 +136,12 @@ impl ApiErrorBase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationProfile {
     #[doc = "Specifies the gallery applications that should be made available to the VM/VMSS"]
-    #[serde(rename = "galleryApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "galleryApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gallery_applications: Vec<VmGalleryApplication>,
 }
 impl ApplicationProfile {
@@ -359,12 +368,21 @@ pub struct AvailabilitySetProperties {
     #[serde(rename = "platformFaultDomainCount", default, skip_serializing_if = "Option::is_none")]
     pub platform_fault_domain_count: Option<i32>,
     #[doc = "A list of references to all virtual machines in the availability set."]
-    #[serde(rename = "virtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines: Vec<SubResource>,
     #[serde(rename = "proximityPlacementGroup", default, skip_serializing_if = "Option::is_none")]
     pub proximity_placement_group: Option<SubResource>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl AvailabilitySetProperties {
@@ -568,7 +586,11 @@ pub struct CapacityReservation {
     #[doc = "Describes a virtual machine scale set sku. NOTE: If the new VM SKU is not supported on the hardware the scale set is currently on, you need to deallocate the VMs in the scale set before you modify the SKU name."]
     pub sku: Sku,
     #[doc = "Availability Zone to use for this capacity reservation. The zone has to be single value and also should be part for the list of zones specified during the capacity reservation group creation. The zone can be assigned only during creation. If not provided, the reservation supports only non-zonal deployments. If provided, enforces VM/VMSS using this capacity reservation to be in same zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl CapacityReservation {
@@ -590,7 +612,11 @@ pub struct CapacityReservationGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<CapacityReservationGroupProperties>,
     #[doc = "Availability Zones to use for this capacity reservation group. The zones can be assigned only during creation. If not provided, the group supports only regional resources in the region. If provided, enforces each capacity reservation in the group to be in one of the zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl CapacityReservationGroup {
@@ -605,7 +631,12 @@ impl CapacityReservationGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityReservationGroupInstanceView {
     #[doc = "List of instance view of the capacity reservations under the capacity reservation group."]
-    #[serde(rename = "capacityReservations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "capacityReservations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capacity_reservations: Vec<CapacityReservationInstanceViewWithName>,
 }
 impl CapacityReservationGroupInstanceView {
@@ -637,10 +668,20 @@ impl CapacityReservationGroupListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityReservationGroupProperties {
     #[doc = "A list of all capacity reservation resource ids that belong to capacity reservation group."]
-    #[serde(rename = "capacityReservations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "capacityReservations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capacity_reservations: Vec<SubResourceReadOnly>,
     #[doc = "A list of references to all virtual machines associated to the capacity reservation group."]
-    #[serde(rename = "virtualMachinesAssociated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachinesAssociated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines_associated: Vec<SubResourceReadOnly>,
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<CapacityReservationGroupInstanceView>,
@@ -671,7 +712,11 @@ pub struct CapacityReservationInstanceView {
     #[serde(rename = "utilizationInfo", default, skip_serializing_if = "Option::is_none")]
     pub utilization_info: Option<CapacityReservationUtilization>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl CapacityReservationInstanceView {
@@ -731,7 +776,12 @@ pub struct CapacityReservationProperties {
     #[serde(rename = "reservationId", default, skip_serializing_if = "Option::is_none")]
     pub reservation_id: Option<String>,
     #[doc = "A list of all virtual machine resource ids that are associated with the capacity reservation."]
-    #[serde(rename = "virtualMachinesAssociated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachinesAssociated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines_associated: Vec<SubResourceReadOnly>,
     #[doc = "The date time when the capacity reservation was last updated."]
     #[serde(rename = "provisioningTime", default, with = "azure_core::date::rfc3339::option")]
@@ -772,7 +822,12 @@ impl CapacityReservationUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityReservationUtilization {
     #[doc = "A list of all virtual machines resource ids allocated against the capacity reservation."]
-    #[serde(rename = "virtualMachinesAllocated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachinesAllocated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines_allocated: Vec<SubResourceReadOnly>,
 }
 impl CapacityReservationUtilization {
@@ -839,7 +894,11 @@ impl CloudService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceExtensionProfile {
     #[doc = "List of extensions for the cloud service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<Extension>,
 }
 impl CloudServiceExtensionProfile {
@@ -878,7 +937,12 @@ pub struct CloudServiceExtensionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "Optional list of roles to apply this extension. If property is not specified or '*' is specified, extension is applied to all roles in the cloud service."]
-    #[serde(rename = "rolesAppliedTo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rolesAppliedTo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles_applied_to: Vec<String>,
 }
 impl CloudServiceExtensionProperties {
@@ -896,9 +960,18 @@ pub struct CloudServiceInstanceView {
     #[serde(rename = "sdkVersion", default, skip_serializing_if = "Option::is_none")]
     pub sdk_version: Option<String>,
     #[doc = "Specifies a list of unique identifiers generated internally for the cloud service. <br /><br /> NOTE: If you are using Azure Diagnostics extension, this property can be used as 'DeploymentId' for querying details."]
-    #[serde(rename = "privateIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ids: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceInstanceViewStatus>,
 }
 impl CloudServiceInstanceView {
@@ -930,7 +1003,12 @@ impl CloudServiceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceNetworkProfile {
     #[doc = "List of Load balancer configurations. Cloud service can have up to two load balancer configurations, corresponding to a Public Load Balancer and an Internal Load Balancer."]
-    #[serde(rename = "loadBalancerConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_configurations: Vec<LoadBalancerConfiguration>,
     #[doc = "Slot type for the cloud service.\r\nPossible values are <br /><br />**Production**<br /><br />**Staging**<br /><br />\r\nIf not specified, the default value is Production."]
     #[serde(rename = "slotType", default, skip_serializing_if = "Option::is_none")]
@@ -947,7 +1025,11 @@ impl CloudServiceNetworkProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceOsProfile {
     #[doc = "Specifies set of certificates that should be installed onto the role instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<CloudServiceVaultSecretGroup>,
 }
 impl CloudServiceOsProfile {
@@ -1051,7 +1133,11 @@ impl CloudServiceRoleListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudServiceRoleProfile {
     #[doc = "List of roles for the cloud service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<CloudServiceRoleProfileProperties>,
 }
 impl CloudServiceRoleProfile {
@@ -1223,7 +1309,12 @@ pub struct CloudServiceVaultSecretGroup {
     #[serde(rename = "sourceVault", default, skip_serializing_if = "Option::is_none")]
     pub source_vault: Option<SubResource>,
     #[doc = "The list of key vault references in SourceVault which contain certificates."]
-    #[serde(rename = "vaultCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_certificates: Vec<CloudServiceVaultCertificate>,
 }
 impl CloudServiceVaultSecretGroup {
@@ -1312,7 +1403,11 @@ pub struct CommunityGalleryImageProperties {
     #[serde(rename = "hyperVGeneration", default, skip_serializing_if = "Option::is_none")]
     pub hyper_v_generation: Option<community_gallery_image_properties::HyperVGeneration>,
     #[doc = "A list of gallery image features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<GalleryImageFeature>,
     #[doc = "Describes the gallery image definition purchase plan. This is used by marketplace images."]
     #[serde(rename = "purchasePlan", default, skip_serializing_if = "Option::is_none")]
@@ -1475,7 +1570,12 @@ pub struct CommunityGalleryInfo {
     #[serde(rename = "communityGalleryEnabled", default, skip_serializing_if = "Option::is_none")]
     pub community_gallery_enabled: Option<bool>,
     #[doc = "Community gallery public name list."]
-    #[serde(rename = "publicNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_names: Vec<String>,
 }
 impl CommunityGalleryInfo {
@@ -1487,7 +1587,11 @@ impl CommunityGalleryInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeOperationListResult {
     #[doc = "The list of compute operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputeOperationValue>,
 }
 impl azure_core::Continuable for ComputeOperationListResult {
@@ -1907,7 +2011,12 @@ impl DedicatedHostAllocatableVm {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedHostAvailableCapacity {
     #[doc = "The unutilized capacity of the dedicated host represented in terms of each VM size that is allowed to be deployed to the dedicated host."]
-    #[serde(rename = "allocatableVMs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allocatableVMs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allocatable_v_ms: Vec<DedicatedHostAllocatableVm>,
 }
 impl DedicatedHostAvailableCapacity {
@@ -1924,7 +2033,11 @@ pub struct DedicatedHostGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<DedicatedHostGroupProperties>,
     #[doc = "Availability Zone to use for this host group. Only single zone is supported. The zone can be assigned only during creation. If not provided, the group supports all zones in the region. If provided, enforces each host in the group to be in the same zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl DedicatedHostGroup {
@@ -1939,7 +2052,11 @@ impl DedicatedHostGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedHostGroupInstanceView {
     #[doc = "List of instance view of the dedicated hosts under the dedicated host group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosts: Vec<DedicatedHostInstanceViewWithName>,
 }
 impl DedicatedHostGroupInstanceView {
@@ -1974,7 +2091,11 @@ pub struct DedicatedHostGroupProperties {
     #[serde(rename = "platformFaultDomainCount")]
     pub platform_fault_domain_count: i32,
     #[doc = "A list of references to all dedicated hosts in the dedicated host group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosts: Vec<SubResourceReadOnly>,
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<DedicatedHostGroupInstanceView>,
@@ -2020,7 +2141,11 @@ pub struct DedicatedHostGroupUpdate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<DedicatedHostGroupProperties>,
     #[doc = "Availability Zone to use for this host group. Only single zone is supported. The zone can be assigned only during creation. If not provided, the group supports all zones in the region. If provided, enforces each host in the group to be in the same zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl DedicatedHostGroupUpdate {
@@ -2038,7 +2163,11 @@ pub struct DedicatedHostInstanceView {
     #[serde(rename = "availableCapacity", default, skip_serializing_if = "Option::is_none")]
     pub available_capacity: Option<DedicatedHostAvailableCapacity>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl DedicatedHostInstanceView {
@@ -2102,7 +2231,12 @@ pub struct DedicatedHostProperties {
     #[serde(rename = "hostId", default, skip_serializing_if = "Option::is_none")]
     pub host_id: Option<String>,
     #[doc = "A list of references to all virtual machines in the Dedicated Host."]
-    #[serde(rename = "virtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines: Vec<SubResourceReadOnly>,
     #[doc = "Specifies the software license type that will be applied to the VMs deployed on the dedicated host. <br><br> Possible values are: <br><br> **None** <br><br> **Windows_Server_Hybrid** <br><br> **Windows_Server_Perpetual** <br><br> Default: **None**"]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -2314,7 +2448,12 @@ impl DiffDiskSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Disallowed {
     #[doc = "A list of disk types."]
-    #[serde(rename = "diskTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_types: Vec<String>,
 }
 impl Disallowed {
@@ -2383,13 +2522,22 @@ pub struct Disk {
     #[serde(rename = "managedBy", default, skip_serializing_if = "Option::is_none")]
     pub managed_by: Option<String>,
     #[doc = "List of relative URIs containing the IDs of the VMs that have the disk attached. maxShares should be set to a value greater than one for disks to allow attaching them to multiple VMs."]
-    #[serde(rename = "managedByExtended", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedByExtended",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_by_extended: Vec<String>,
     #[doc = "The disks sku name. Can be Standard_LRS, Premium_LRS, StandardSSD_LRS, UltraSSD_LRS, Premium_ZRS, StandardSSD_ZRS, or PremiumV2_LRS."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<DiskSku>,
     #[doc = "The Logical zone list for Disk."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The complex type of the extended location."]
     #[serde(rename = "extendedLocation", default, skip_serializing_if = "Option::is_none")]
@@ -2454,7 +2602,12 @@ impl DiskAccessList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskAccessProperties {
     #[doc = "A readonly collection of private endpoint connections created on the disk. Currently only one endpoint connection is supported."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The disk access resource provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2652,10 +2805,19 @@ pub struct DiskInstanceView {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Specifies the encryption settings for the OS Disk. <br><br> Minimum api-version: 2015-06-15"]
-    #[serde(rename = "encryptionSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "encryptionSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub encryption_settings: Vec<DiskEncryptionSettings>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl DiskInstanceView {
@@ -2741,7 +2903,12 @@ pub struct DiskProperties {
     #[serde(rename = "maxShares", default, skip_serializing_if = "Option::is_none")]
     pub max_shares: Option<i32>,
     #[doc = "Details of the list of all VMs that have the disk attached. maxShares should be set to a value greater than one for disks to allow attaching them to multiple VMs."]
-    #[serde(rename = "shareInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_info: Vec<ShareInfoElement>,
     #[doc = "Policy for accessing the disk via network."]
     #[serde(rename = "networkAccessPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -3328,7 +3495,12 @@ pub struct EncryptionImages {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<OsDiskImageEncryption>,
     #[doc = "A list of encryption specifications for data disk images."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<DataDiskImageEncryption>,
 }
 impl EncryptionImages {
@@ -3411,7 +3583,12 @@ pub struct EncryptionSetProperties {
     #[serde(rename = "activeKey", default, skip_serializing_if = "Option::is_none")]
     pub active_key: Option<KeyForDiskEncryptionSet>,
     #[doc = "A readonly collection of key vault keys previously used by this disk encryption set while a key rotation is in progress. It will be empty if there is no ongoing key rotation."]
-    #[serde(rename = "previousKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "previousKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub previous_keys: Vec<KeyForDiskEncryptionSet>,
     #[doc = "The disk encryption set provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3440,7 +3617,12 @@ pub struct EncryptionSettingsCollection {
     #[doc = "Set this flag to true and provide DiskEncryptionKey and optional KeyEncryptionKey to enable encryption. Set this flag to false and remove DiskEncryptionKey and KeyEncryptionKey to disable encryption. If EncryptionSettings is null in the request object, the existing settings remain unchanged."]
     pub enabled: bool,
     #[doc = "A collection of encryption settings, one for each disk volume."]
-    #[serde(rename = "encryptionSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "encryptionSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub encryption_settings: Vec<EncryptionSettingsElement>,
     #[doc = "Describes what type of encryption is used for the disks. Once this field is set, it cannot be overwritten. '1.0' corresponds to Azure Disk Encryption with AAD app.'1.1' corresponds to Azure Disk Encryption."]
     #[serde(rename = "encryptionSettingsVersion", default, skip_serializing_if = "Option::is_none")]
@@ -3799,7 +3981,12 @@ impl GalleryApplicationVersionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GalleryArtifactPublishingProfileBase {
     #[doc = "The target regions where the Image Version is going to be replicated to. This property is updatable."]
-    #[serde(rename = "targetRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_regions: Vec<TargetRegion>,
     #[doc = "The number of replicas of the Image Version to be created per region. This property would take effect for a region when regionalReplicaCount is not specified. This property is updatable."]
     #[serde(rename = "replicaCount", default, skip_serializing_if = "Option::is_none")]
@@ -3820,7 +4007,12 @@ pub struct GalleryArtifactPublishingProfileBase {
     #[serde(rename = "replicationMode", default, skip_serializing_if = "Option::is_none")]
     pub replication_mode: Option<gallery_artifact_publishing_profile_base::ReplicationMode>,
     #[doc = "The target extended locations where the Image Version is going to be replicated to. This property is updatable."]
-    #[serde(rename = "targetExtendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetExtendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_extended_locations: Vec<GalleryTargetExtendedLocation>,
 }
 impl GalleryArtifactPublishingProfileBase {
@@ -4153,7 +4345,11 @@ pub struct GalleryImageProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<GalleryProvisioningState>,
     #[doc = "A list of gallery image features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<GalleryImageFeature>,
     #[doc = "The architecture of the image. Applicable to OS disks only."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4334,7 +4530,12 @@ pub struct GalleryImageVersionStorageProfile {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<GalleryOsDiskImage>,
     #[doc = "A list of data disk images."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<GalleryDataDiskImage>,
 }
 impl GalleryImageVersionStorageProfile {
@@ -5417,7 +5618,12 @@ pub struct ImageStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<ImageOsDisk>,
     #[doc = "Specifies the parameters that are used to add a data disk to a virtual machine. <br><br> For more information about disks, see [About disks and VHDs for Azure virtual machines](https://docs.microsoft.com/azure/virtual-machines/managed-disks-overview)."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<ImageDataDisk>,
     #[doc = "Specifies whether an image is zone resilient or not. Default is false. Zone resilient images can be created only in regions that provide Zone Redundant Storage (ZRS)."]
     #[serde(rename = "zoneResilient", default, skip_serializing_if = "Option::is_none")]
@@ -5510,7 +5716,12 @@ pub mod instance_view_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstanceViewStatusesSummary {
     #[doc = "The summary."]
-    #[serde(rename = "statusesSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusesSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses_summary: Vec<StatusCodeCount>,
 }
 impl InstanceViewStatusesSummary {
@@ -5707,13 +5918,28 @@ impl LinuxConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinuxParameters {
     #[doc = "The update classifications to select when installing patches for Linux."]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
     #[doc = "packages to include in the patch operation. Format: packageName_packageVersion"]
-    #[serde(rename = "packageNameMasksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_include: Vec<String>,
     #[doc = "packages to exclude in the patch operation. Format: packageName_packageVersion"]
-    #[serde(rename = "packageNameMasksToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_exclude: Vec<String>,
     #[doc = "This is used as a maintenance run identifier for Auto VM Guest Patching in Linux."]
     #[serde(rename = "maintenanceRunId", default, skip_serializing_if = "Option::is_none")]
@@ -6208,13 +6434,23 @@ pub mod network_interface_reference_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfile {
     #[doc = "Specifies the list of resource Ids for the network interfaces associated with the virtual machine."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterfaceReference>,
     #[doc = "specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations"]
     #[serde(rename = "networkApiVersion", default, skip_serializing_if = "Option::is_none")]
     pub network_api_version: Option<network_profile::NetworkApiVersion>,
     #[doc = "Specifies the networking configurations that will be used to create the virtual machine networking resources."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineNetworkInterfaceConfiguration>,
 }
 impl NetworkProfile {
@@ -6477,7 +6713,11 @@ pub struct OsFamilyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "List of OS versions belonging to this family."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub versions: Vec<OsVersionPropertiesBase>,
 }
 impl OsFamilyProperties {
@@ -6507,7 +6747,11 @@ pub struct OsProfile {
     #[serde(rename = "linuxConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub linux_configuration: Option<LinuxConfiguration>,
     #[doc = "Specifies set of certificates that should be installed onto the virtual machine. To install certificates on a virtual machine it is recommended to use the [Azure Key Vault virtual machine extension for Linux](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-linux) or the [Azure Key Vault virtual machine extension for Windows](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-windows)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<VaultSecretGroup>,
     #[doc = "Specifies whether extension operations should be allowed on the virtual machine. <br><br>This may only be set to False when no extensions are present on the virtual machine."]
     #[serde(rename = "allowExtensionOperations", default, skip_serializing_if = "Option::is_none")]
@@ -6847,7 +7091,11 @@ pub struct PatchInstallationDetail {
     #[serde(rename = "kbId", default, skip_serializing_if = "Option::is_none")]
     pub kb_id: Option<String>,
     #[doc = "The classification(s) of the patch as provided by the patch publisher."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications: Vec<String>,
     #[doc = "The state of the patch after the installation operation completed."]
     #[serde(rename = "installationState", default, skip_serializing_if = "Option::is_none")]
@@ -7115,7 +7363,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The uri to fetch the next page of snapshots. Call ListNext() with this to fetch the next page of snapshots."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7259,7 +7511,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -7274,10 +7530,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -7324,7 +7590,11 @@ pub struct ProximityPlacementGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<ProximityPlacementGroupProperties>,
     #[doc = "Specifies the Availability Zone where virtual machine, virtual machine scale set or availability set associated with the  proximity placement group can be created."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ProximityPlacementGroup {
@@ -7363,13 +7633,28 @@ pub struct ProximityPlacementGroupProperties {
     #[serde(rename = "proximityPlacementGroupType", default, skip_serializing_if = "Option::is_none")]
     pub proximity_placement_group_type: Option<proximity_placement_group_properties::ProximityPlacementGroupType>,
     #[doc = "A list of references to all virtual machines in the proximity placement group."]
-    #[serde(rename = "virtualMachines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machines: Vec<SubResourceWithColocationStatus>,
     #[doc = "A list of references to all virtual machine scale sets in the proximity placement group."]
-    #[serde(rename = "virtualMachineScaleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachineScaleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machine_scale_sets: Vec<SubResourceWithColocationStatus>,
     #[doc = "A list of references to all availability sets in the proximity placement group."]
-    #[serde(rename = "availabilitySets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilitySets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_sets: Vec<SubResourceWithColocationStatus>,
     #[doc = "Instance view status."]
     #[serde(rename = "colocationStatus", default, skip_serializing_if = "Option::is_none")]
@@ -7426,7 +7711,12 @@ pub mod proximity_placement_group_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Intent {
         #[doc = "Specifies possible sizes of virtual machines that can be created in the proximity placement group."]
-        #[serde(rename = "vmSizes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "vmSizes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub vm_sizes: Vec<String>,
     }
     impl Intent {
@@ -7746,7 +8036,11 @@ pub struct ReplicationStatus {
     #[serde(rename = "aggregatedState", default, skip_serializing_if = "Option::is_none")]
     pub aggregated_state: Option<replication_status::AggregatedState>,
     #[doc = "This is a summary of replication status for each region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub summary: Vec<RegionalReplicationStatus>,
 }
 impl ReplicationStatus {
@@ -7929,22 +8223,48 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<ResourceSkuCapacity>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "A list of locations and availability zones in those locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "The api versions that support this SKU."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Metadata for retrieving price info."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<ResourceSkuCosts>,
     #[doc = "A name value pair to describe the capability."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -8023,13 +8343,27 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "List of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ResourceSkuZoneDetails>,
     #[doc = "The names of extended locations."]
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<String>,
     #[doc = "The type of the extended location."]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
@@ -8082,10 +8416,18 @@ pub mod resource_sku_location_info {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuRestrictionInfo {
     #[doc = "Locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "List of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuRestrictionInfo {
@@ -8100,7 +8442,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Describes an available Compute SKU Restriction Information."]
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
@@ -8133,10 +8479,18 @@ pub mod resource_sku_restrictions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuZoneDetails {
     #[doc = "The set of zones that the SKU is available in with the specified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
     #[doc = "A list of capabilities that are available for the SKU in the specified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
 }
 impl ResourceSkuZoneDetails {
@@ -8243,7 +8597,11 @@ impl RestorePointCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointCollectionListResult {
     #[doc = "Gets the list of restore point collections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorePointCollection>,
     #[doc = "The uri to fetch the next page of RestorePointCollections. Call ListNext() with this to fetch the next page of RestorePointCollections"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8273,7 +8631,12 @@ pub struct RestorePointCollectionProperties {
     #[serde(rename = "restorePointCollectionId", default, skip_serializing_if = "Option::is_none")]
     pub restore_point_collection_id: Option<String>,
     #[doc = "A list containing all restore points created under this restore point collection."]
-    #[serde(rename = "restorePoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restorePoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_points: Vec<RestorePoint>,
 }
 impl RestorePointCollectionProperties {
@@ -8314,10 +8677,19 @@ impl RestorePointCollectionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointInstanceView {
     #[doc = "The disk restore points information."]
-    #[serde(rename = "diskRestorePoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskRestorePoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_restore_points: Vec<DiskRestorePointInstanceView>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl RestorePointInstanceView {
@@ -8329,7 +8701,12 @@ impl RestorePointInstanceView {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointProperties {
     #[doc = "List of disk resource ids that the customer wishes to exclude from the restore point. If no disks are specified, all disks will be included."]
-    #[serde(rename = "excludeDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludeDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude_disks: Vec<ApiEntityReference>,
     #[doc = "Describes the properties of the Virtual Machine for which the restore point was created. The properties provided are a subset and the snapshot of the overall Virtual Machine properties captured at the time of the restore point creation."]
     #[serde(rename = "sourceMetadata", default, skip_serializing_if = "Option::is_none")]
@@ -8534,7 +8911,12 @@ pub struct RestorePointSourceVmStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<RestorePointSourceVmosDisk>,
     #[doc = "Gets the data disks of the VM captured at the time of the restore point creation."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<RestorePointSourceVmDataDisk>,
 }
 impl RestorePointSourceVmStorageProfile {
@@ -8599,7 +8981,11 @@ pub struct RoleInstanceInstanceView {
     #[doc = "Specifies a unique identifier generated internally for the cloud service associated with this role instance. <br /><br /> NOTE: If you are using Azure Diagnostics extension, this property can be used as 'DeploymentId' for querying details."]
     #[serde(rename = "privateId", default, skip_serializing_if = "Option::is_none")]
     pub private_id: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceInstanceViewStatus>,
 }
 impl RoleInstanceInstanceView {
@@ -8631,7 +9017,12 @@ impl RoleInstanceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleInstanceNetworkProfile {
     #[doc = "Specifies the list of resource Ids for the network interfaces associated with the role instance."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<SubResource>,
 }
 impl RoleInstanceNetworkProfile {
@@ -8816,7 +9207,11 @@ pub struct RunCommandDocument {
     #[doc = "The script to be executed."]
     pub script: Vec<String>,
     #[doc = "The parameters used by the script."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<RunCommandParameterDefinition>,
 }
 impl RunCommandDocument {
@@ -8871,10 +9266,18 @@ pub struct RunCommandInput {
     #[serde(rename = "commandId")]
     pub command_id: String,
     #[doc = "Optional. The script to be executed.  When this value is given, the given script will override the default script of the command."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub script: Vec<String>,
     #[doc = "The run command parameters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<RunCommandInputParameter>,
 }
 impl RunCommandInput {
@@ -8947,7 +9350,11 @@ impl RunCommandParameterDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunCommandResult {
     #[doc = "Run command operation response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InstanceViewStatus>,
 }
 impl RunCommandResult {
@@ -8959,7 +9366,11 @@ impl RunCommandResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScaleInPolicy {
     #[doc = "The rules to be followed when scaling-in a virtual machine scale set. <br><br> Possible values are: <br><br> **Default** When a virtual machine scale set is scaled in, the scale set will first be balanced across zones if it is a zonal scale set. Then, it will be balanced across Fault Domains as far as possible. Within each Fault Domain, the virtual machines chosen for removal will be the newest ones that are not protected from scale-in. <br><br> **OldestVM** When a virtual machine scale set is being scaled-in, the oldest virtual machines that are not protected from scale-in will be chosen for removal. For zonal virtual machine scale sets, the scale set will first be balanced across zones. Within each zone, the oldest virtual machines that are not protected will be chosen for removal. <br><br> **NewestVM** When a virtual machine scale set is being scaled-in, the newest virtual machines that are not protected from scale-in will be chosen for removal. For zonal virtual machine scale sets, the scale set will first be balanced across zones. Within each zone, the newest virtual machines that are not protected will be chosen for removal. <br><br>"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<String>,
     #[doc = "This property allows you to specify if virtual machines chosen for removal have to be force deleted when a virtual machine scale set is being scaled-in.(Feature in Preview)"]
     #[serde(rename = "forceDeletion", default, skip_serializing_if = "Option::is_none")]
@@ -9204,7 +9615,11 @@ pub struct SharedGalleryImageProperties {
     #[serde(rename = "hyperVGeneration", default, skip_serializing_if = "Option::is_none")]
     pub hyper_v_generation: Option<shared_gallery_image_properties::HyperVGeneration>,
     #[doc = "A list of gallery image features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<GalleryImageFeature>,
     #[doc = "Describes the gallery image definition purchase plan. This is used by marketplace images."]
     #[serde(rename = "purchasePlan", default, skip_serializing_if = "Option::is_none")]
@@ -9347,7 +9762,12 @@ pub struct SharedGalleryImageVersionStorageProfile {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<SharedGalleryOsDiskImage>,
     #[doc = "A list of data disk images."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<SharedGalleryDataDiskImage>,
 }
 impl SharedGalleryImageVersionStorageProfile {
@@ -9393,7 +9813,11 @@ pub struct SharingProfile {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub permissions: Option<sharing_profile::Permissions>,
     #[doc = "A list of sharing profile groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<SharingProfileGroup>,
     #[doc = "Information of community gallery if current gallery is shared to community"]
     #[serde(rename = "communityGalleryInfo", default, skip_serializing_if = "Option::is_none")]
@@ -9453,7 +9877,11 @@ pub struct SharingProfileGroup {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<sharing_profile_group::Type>,
     #[doc = "A list of subscription/tenant ids the gallery is aimed to be shared to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ids: Vec<String>,
 }
 impl SharingProfileGroup {
@@ -9550,7 +9978,11 @@ pub struct SharingStatus {
     #[serde(rename = "aggregatedState", default, skip_serializing_if = "Option::is_none")]
     pub aggregated_state: Option<SharingState>,
     #[doc = "Summary of all regional sharing status."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub summary: Vec<RegionalSharingStatus>,
 }
 impl SharingStatus {
@@ -9565,7 +9997,11 @@ pub struct SharingUpdate {
     #[serde(rename = "operationType")]
     pub operation_type: sharing_update::OperationType,
     #[doc = "A list of sharing profile groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<SharingProfileGroup>,
 }
 impl SharingUpdate {
@@ -10000,7 +10436,12 @@ impl SpotRestorePolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SshConfiguration {
     #[doc = "The list of SSH public keys used to authenticate with linux based VMs."]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<SshPublicKey>,
 }
 impl SshConfiguration {
@@ -10186,7 +10627,12 @@ pub struct StorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
     #[doc = "Specifies the parameters that are used to add a data disk to a virtual machine. <br><br> For more information about disks, see [About disks and VHDs for Azure virtual machines](https://docs.microsoft.com/azure/virtual-machines/managed-disks-overview)."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
 }
 impl StorageProfile {
@@ -10834,7 +11280,12 @@ pub struct VaultSecretGroup {
     #[serde(rename = "sourceVault", default, skip_serializing_if = "Option::is_none")]
     pub source_vault: Option<SubResource>,
     #[doc = "The list of key vault references in SourceVault which contain certificates."]
-    #[serde(rename = "vaultCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_certificates: Vec<VaultCertificate>,
 }
 impl VaultSecretGroup {
@@ -10866,13 +11317,21 @@ pub struct VirtualMachine {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<VirtualMachineProperties>,
     #[doc = "The virtual machine child extension resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<VirtualMachineExtension>,
     #[doc = "Identity for the virtual machine."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<VirtualMachineIdentity>,
     #[doc = "The virtual machine zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The complex type of the extended location."]
     #[serde(rename = "extendedLocation", default, skip_serializing_if = "Option::is_none")]
@@ -10898,10 +11357,19 @@ pub struct VirtualMachineAgentInstanceView {
     #[serde(rename = "vmAgentVersion", default, skip_serializing_if = "Option::is_none")]
     pub vm_agent_version: Option<String>,
     #[doc = "The virtual machine extension handler instance view."]
-    #[serde(rename = "extensionHandlers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extensionHandlers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extension_handlers: Vec<VirtualMachineExtensionHandlerInstanceView>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachineAgentInstanceView {
@@ -10931,7 +11399,12 @@ pub struct VirtualMachineAssessPatchesResult {
     #[serde(rename = "startDateTime", default, with = "azure_core::date::rfc3339::option")]
     pub start_date_time: Option<time::OffsetDateTime>,
     #[doc = "The list of patches that have been detected as available for installation."]
-    #[serde(rename = "availablePatches", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availablePatches",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_patches: Vec<VirtualMachineSoftwarePatchProperties>,
     #[doc = "Api error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11025,7 +11498,11 @@ pub struct VirtualMachineCaptureResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<serde_json::Value>,
     #[doc = "a list of resource items of the captured virtual machine"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<serde_json::Value>,
 }
 impl VirtualMachineCaptureResult {
@@ -11125,10 +11602,18 @@ pub struct VirtualMachineExtensionInstanceView {
     #[serde(rename = "typeHandlerVersion", default, skip_serializing_if = "Option::is_none")]
     pub type_handler_version: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub substatuses: Vec<InstanceViewStatus>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachineExtensionInstanceView {
@@ -11238,7 +11723,11 @@ impl VirtualMachineExtensionUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineExtensionsListResult {
     #[doc = "The list of extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineExtension>,
 }
 impl VirtualMachineExtensionsListResult {
@@ -11332,7 +11821,12 @@ pub struct VirtualMachineImageProperties {
     #[doc = "Contains the os disk image information."]
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<OsDiskImage>,
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<DataDiskImage>,
     #[doc = "Describes automatic OS upgrade properties on the image."]
     #[serde(rename = "automaticOSUpgradeProperties", default, skip_serializing_if = "Option::is_none")]
@@ -11343,7 +11837,11 @@ pub struct VirtualMachineImageProperties {
     #[doc = "Specifies the disallowed configuration for a virtual machine image."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub disallowed: Option<DisallowedConfiguration>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<VirtualMachineImageFeature>,
     #[doc = "Specifies the Architecture Type"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11480,7 +11978,11 @@ pub struct VirtualMachineInstallPatchesResult {
     #[serde(rename = "failedPatchCount", default, skip_serializing_if = "Option::is_none")]
     pub failed_patch_count: Option<i32>,
     #[doc = "The patches that were installed during the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub patches: Vec<PatchInstallationDetail>,
     #[doc = "The UTC timestamp when the operation began."]
     #[serde(rename = "startDateTime", default, with = "azure_core::date::rfc3339::option")]
@@ -11616,10 +12118,18 @@ pub struct VirtualMachineInstanceView {
     #[serde(rename = "maintenanceRedeployStatus", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_redeploy_status: Option<MaintenanceRedeployStatus>,
     #[doc = "The virtual machine disk information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<DiskInstanceView>,
     #[doc = "The extensions information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineExtensionInstanceView>,
     #[doc = "The health status of the VM."]
     #[serde(rename = "vmHealth", default, skip_serializing_if = "Option::is_none")]
@@ -11631,7 +12141,11 @@ pub struct VirtualMachineInstanceView {
     #[serde(rename = "assignedHost", default, skip_serializing_if = "Option::is_none")]
     pub assigned_host: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "The status of virtual machine patch operations."]
     #[serde(rename = "patchStatus", default, skip_serializing_if = "Option::is_none")]
@@ -11819,7 +12333,12 @@ pub mod virtual_machine_network_interface_configuration_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineNetworkInterfaceDnsSettingsConfiguration {
     #[doc = "List of DNS servers IP addresses"]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl VirtualMachineNetworkInterfaceDnsSettingsConfiguration {
@@ -11856,13 +12375,28 @@ pub struct VirtualMachineNetworkInterfaceIpConfigurationProperties {
     #[serde(rename = "privateIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub private_ip_address_version: Option<virtual_machine_network_interface_ip_configuration_properties::PrivateIpAddressVersion>,
     #[doc = "Specifies an array of references to application security group."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<SubResource>,
     #[doc = "Specifies an array of references to backend address pools of application gateways. A virtual machine can reference backend address pools of multiple application gateways. Multiple virtual machines cannot use the same application gateway."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to backend address pools of load balancers. A virtual machine can reference backend address pools of one public and one internal load balancer. [Multiple virtual machines cannot use the same basic sku load balancer]."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<SubResource>,
 }
 impl VirtualMachineNetworkInterfaceIpConfigurationProperties {
@@ -11920,7 +12454,12 @@ pub struct VirtualMachinePatchStatus {
     #[serde(rename = "lastPatchInstallationSummary", default, skip_serializing_if = "Option::is_none")]
     pub last_patch_installation_summary: Option<LastPatchInstallationSummary>,
     #[doc = "The enablement status of the specified patchMode"]
-    #[serde(rename = "configurationStatuses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configurationStatuses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configuration_statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachinePatchStatus {
@@ -12043,7 +12582,12 @@ pub struct VirtualMachinePublicIpAddressConfigurationProperties {
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
     pub dns_settings: Option<VirtualMachinePublicIpAddressDnsSettingsConfiguration>,
     #[doc = "The list of IP tags associated with the public IP address."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<VirtualMachineIpTag>,
     #[serde(rename = "publicIPPrefix", default, skip_serializing_if = "Option::is_none")]
     pub public_ip_prefix: Option<SubResource>,
@@ -12239,7 +12783,11 @@ pub struct VirtualMachineRunCommandInstanceView {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
 }
 impl VirtualMachineRunCommandInstanceView {
@@ -12304,10 +12852,19 @@ pub struct VirtualMachineRunCommandProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub source: Option<VirtualMachineRunCommandScriptSource>,
     #[doc = "The parameters used by the script."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<RunCommandInputParameter>,
     #[doc = "The parameters used by the script."]
-    #[serde(rename = "protectedParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_parameters: Vec<RunCommandInputParameter>,
     #[doc = "Optional. If set to true, provisioning will complete as soon as the script starts and will not wait for script to complete."]
     #[serde(rename = "asyncExecution", default, skip_serializing_if = "Option::is_none")]
@@ -12409,7 +12966,11 @@ pub struct VirtualMachineScaleSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<VirtualMachineScaleSetIdentity>,
     #[doc = "The virtual machine scale set zones. NOTE: Availability zones can only be set when you create the scale set"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The complex type of the extended location."]
     #[serde(rename = "extendedLocation", default, skip_serializing_if = "Option::is_none")]
@@ -12521,7 +13082,11 @@ impl VirtualMachineScaleSetExtensionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetExtensionProfile {
     #[doc = "The virtual machine scale set child extension resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineScaleSetExtension>,
     #[doc = "Specifies the time alloted for all extensions to start. The time duration should be between 15 minutes and 120 minutes (inclusive) and should be specified in ISO 8601 format. The default value is 90 minutes (PT1H30M). <br><br> Minimum api-version: 2020-06-01"]
     #[serde(rename = "extensionsTimeBudget", default, skip_serializing_if = "Option::is_none")]
@@ -12563,7 +13128,12 @@ pub struct VirtualMachineScaleSetExtensionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "Collection of extension names after which this extension needs to be provisioned."]
-    #[serde(rename = "provisionAfterExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisionAfterExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provision_after_extensions: Vec<String>,
     #[doc = "Indicates whether failures stemming from the extension will be suppressed (Operational failures such as not connecting to the VM will not be suppressed regardless of this value). The default is false."]
     #[serde(rename = "suppressFailures", default, skip_serializing_if = "Option::is_none")]
@@ -12645,16 +13215,36 @@ pub struct VirtualMachineScaleSetIpConfigurationProperties {
     #[serde(rename = "privateIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub private_ip_address_version: Option<virtual_machine_scale_set_ip_configuration_properties::PrivateIpAddressVersion>,
     #[doc = "Specifies an array of references to backend address pools of application gateways. A scale set can reference backend address pools of multiple application gateways. Multiple scale sets cannot use the same application gateway."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to application security group."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<SubResource>,
     #[doc = "Specifies an array of references to backend address pools of load balancers. A scale set can reference backend address pools of one public and one internal load balancer. Multiple scale sets cannot use the same basic sku load balancer."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to inbound Nat pools of the load balancers. A scale set can reference inbound nat pools of one public and one internal load balancer. Multiple scale sets cannot use the same basic sku load balancer."]
-    #[serde(rename = "loadBalancerInboundNatPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerInboundNatPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_inbound_nat_pools: Vec<SubResource>,
 }
 impl VirtualMachineScaleSetIpConfigurationProperties {
@@ -12742,13 +13332,26 @@ pub struct VirtualMachineScaleSetInstanceView {
     #[serde(rename = "virtualMachine", default, skip_serializing_if = "Option::is_none")]
     pub virtual_machine: Option<VirtualMachineScaleSetInstanceViewStatusesSummary>,
     #[doc = "The extensions information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineScaleSetVmExtensionsSummary>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "The orchestration services information."]
-    #[serde(rename = "orchestrationServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orchestrationServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub orchestration_services: Vec<OrchestrationServiceSummary>,
 }
 impl VirtualMachineScaleSetInstanceView {
@@ -12760,7 +13363,12 @@ impl VirtualMachineScaleSetInstanceView {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetInstanceViewStatusesSummary {
     #[doc = "The extensions information."]
-    #[serde(rename = "statusesSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusesSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses_summary: Vec<VirtualMachineStatusCodeCount>,
 }
 impl VirtualMachineScaleSetInstanceViewStatusesSummary {
@@ -12905,7 +13513,12 @@ impl VirtualMachineScaleSetNetworkConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetNetworkConfigurationDnsSettings {
     #[doc = "List of DNS servers IP addresses"]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl VirtualMachineScaleSetNetworkConfigurationDnsSettings {
@@ -13001,7 +13614,12 @@ pub struct VirtualMachineScaleSetNetworkProfile {
     #[serde(rename = "healthProbe", default, skip_serializing_if = "Option::is_none")]
     pub health_probe: Option<ApiEntityReference>,
     #[doc = "The list of network configurations."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineScaleSetNetworkConfiguration>,
     #[doc = "specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations for Virtual Machine Scale Set with orchestration mode 'Flexible'"]
     #[serde(rename = "networkApiVersion", default, skip_serializing_if = "Option::is_none")]
@@ -13079,7 +13697,12 @@ pub struct VirtualMachineScaleSetOsDisk {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub image: Option<VirtualHardDisk>,
     #[doc = "Specifies the container urls that are used to store operating system disks for the scale set."]
-    #[serde(rename = "vhdContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vhdContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vhd_containers: Vec<String>,
     #[doc = "Describes the parameters of a ScaleSet managed disk."]
     #[serde(rename = "managedDisk", default, skip_serializing_if = "Option::is_none")]
@@ -13136,7 +13759,11 @@ pub struct VirtualMachineScaleSetOsProfile {
     #[serde(rename = "linuxConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub linux_configuration: Option<LinuxConfiguration>,
     #[doc = "Specifies set of certificates that should be installed onto the virtual machines in the scale set. To install certificates on a virtual machine it is recommended to use the [Azure Key Vault virtual machine extension for Linux](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-linux) or the [Azure Key Vault virtual machine extension for Windows](https://docs.microsoft.com/azure/virtual-machines/extensions/key-vault-windows)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<VaultSecretGroup>,
     #[doc = "Specifies whether extension operations should be allowed on the virtual machine scale set. <br><br>This may only be set to False when no extensions are present on the virtual machine scale set."]
     #[serde(rename = "allowExtensionOperations", default, skip_serializing_if = "Option::is_none")]
@@ -13252,7 +13879,12 @@ pub struct VirtualMachineScaleSetPublicIpAddressConfigurationProperties {
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
     pub dns_settings: Option<VirtualMachineScaleSetPublicIpAddressConfigurationDnsSettings>,
     #[doc = "The list of IP tags associated with the public IP address."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<VirtualMachineScaleSetIpTag>,
     #[serde(rename = "publicIPPrefix", default, skip_serializing_if = "Option::is_none")]
     pub public_ip_prefix: Option<SubResource>,
@@ -13351,7 +13983,12 @@ pub struct VirtualMachineScaleSetReimageParameters {
     #[serde(flatten)]
     pub virtual_machine_scale_set_vm_reimage_parameters: VirtualMachineScaleSetVmReimageParameters,
     #[doc = "The virtual machine scale set instance ids. Omitting the virtual machine scale set instance ids will result in the operation being performed on all virtual machines in the virtual machine scale set."]
-    #[serde(rename = "instanceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "instanceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instance_ids: Vec<String>,
 }
 impl VirtualMachineScaleSetReimageParameters {
@@ -13417,7 +14054,12 @@ pub struct VirtualMachineScaleSetStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<VirtualMachineScaleSetOsDisk>,
     #[doc = "Specifies the parameters that are used to add data disks to the virtual machines in the scale set. <br><br> For more information about disks, see [About disks and VHDs for Azure virtual machines](https://docs.microsoft.com/azure/virtual-machines/managed-disks-overview)."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<VirtualMachineScaleSetDataDisk>,
 }
 impl VirtualMachineScaleSetStorageProfile {
@@ -13481,16 +14123,36 @@ pub struct VirtualMachineScaleSetUpdateIpConfigurationProperties {
     #[serde(rename = "privateIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub private_ip_address_version: Option<virtual_machine_scale_set_update_ip_configuration_properties::PrivateIpAddressVersion>,
     #[doc = "The application gateway backend address pools."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<SubResource>,
     #[doc = "Specifies an array of references to application security group."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<SubResource>,
     #[doc = "The load balancer backend address pools."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<SubResource>,
     #[doc = "The load balancer inbound nat pools."]
-    #[serde(rename = "loadBalancerInboundNatPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerInboundNatPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_inbound_nat_pools: Vec<SubResource>,
 }
 impl VirtualMachineScaleSetUpdateIpConfigurationProperties {
@@ -13573,7 +14235,12 @@ pub struct VirtualMachineScaleSetUpdateNetworkConfigurationProperties {
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
     pub dns_settings: Option<VirtualMachineScaleSetNetworkConfigurationDnsSettings>,
     #[doc = "The virtual machine scale set IP Configuration."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<VirtualMachineScaleSetUpdateIpConfiguration>,
     #[doc = "Whether IP forwarding enabled on this NIC."]
     #[serde(rename = "enableIPForwarding", default, skip_serializing_if = "Option::is_none")]
@@ -13634,7 +14301,12 @@ pub struct VirtualMachineScaleSetUpdateNetworkProfile {
     #[serde(rename = "healthProbe", default, skip_serializing_if = "Option::is_none")]
     pub health_probe: Option<ApiEntityReference>,
     #[doc = "The list of network configurations."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineScaleSetUpdateNetworkConfiguration>,
     #[doc = "specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations for Virtual Machine Scale Set with orchestration mode 'Flexible'"]
     #[serde(rename = "networkApiVersion", default, skip_serializing_if = "Option::is_none")]
@@ -13700,7 +14372,12 @@ pub struct VirtualMachineScaleSetUpdateOsDisk {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub image: Option<VirtualHardDisk>,
     #[doc = "The list of virtual hard disk container uris."]
-    #[serde(rename = "vhdContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vhdContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vhd_containers: Vec<String>,
     #[doc = "Describes the parameters of a ScaleSet managed disk."]
     #[serde(rename = "managedDisk", default, skip_serializing_if = "Option::is_none")]
@@ -13727,7 +14404,11 @@ pub struct VirtualMachineScaleSetUpdateOsProfile {
     #[serde(rename = "linuxConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub linux_configuration: Option<LinuxConfiguration>,
     #[doc = "The List of certificates for addition to the VM."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<VaultSecretGroup>,
 }
 impl VirtualMachineScaleSetUpdateOsProfile {
@@ -13859,7 +14540,12 @@ pub struct VirtualMachineScaleSetUpdateStorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<VirtualMachineScaleSetUpdateOsDisk>,
     #[doc = "The data disks."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<VirtualMachineScaleSetDataDisk>,
 }
 impl VirtualMachineScaleSetUpdateStorageProfile {
@@ -13923,10 +14609,18 @@ pub struct VirtualMachineScaleSetVm {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub plan: Option<Plan>,
     #[doc = "The virtual machine child extension resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<VirtualMachineExtension>,
     #[doc = "The virtual machine zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Identity for the virtual machine."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -13990,7 +14684,11 @@ impl VirtualMachineScaleSetVmExtensionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetVmExtensionsListResult {
     #[doc = "The list of VMSS VM extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineScaleSetVmExtension>,
 }
 impl VirtualMachineScaleSetVmExtensionsListResult {
@@ -14005,7 +14703,12 @@ pub struct VirtualMachineScaleSetVmExtensionsSummary {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The extensions information."]
-    #[serde(rename = "statusesSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusesSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses_summary: Vec<VirtualMachineStatusCodeCount>,
 }
 impl VirtualMachineScaleSetVmExtensionsSummary {
@@ -14017,7 +14720,12 @@ impl VirtualMachineScaleSetVmExtensionsSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetVmInstanceIDs {
     #[doc = "The virtual machine scale set instance ids. Omitting the virtual machine scale set instance ids will result in the operation being performed on all virtual machines in the virtual machine scale set."]
-    #[serde(rename = "instanceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "instanceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instance_ids: Vec<String>,
 }
 impl VirtualMachineScaleSetVmInstanceIDs {
@@ -14056,10 +14764,18 @@ pub struct VirtualMachineScaleSetVmInstanceView {
     #[serde(rename = "maintenanceRedeployStatus", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_redeploy_status: Option<MaintenanceRedeployStatus>,
     #[doc = "The disks information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<DiskInstanceView>,
     #[doc = "The extensions information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VirtualMachineExtensionInstanceView>,
     #[doc = "The health status of the VM."]
     #[serde(rename = "vmHealth", default, skip_serializing_if = "Option::is_none")]
@@ -14068,7 +14784,11 @@ pub struct VirtualMachineScaleSetVmInstanceView {
     #[serde(rename = "bootDiagnostics", default, skip_serializing_if = "Option::is_none")]
     pub boot_diagnostics: Option<BootDiagnosticsInstanceView>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "Resource id of the dedicated host, on which the virtual machine is allocated through automatic placement, when the virtual machine is associated with a dedicated host group that has automatic placement enabled. <br><br>Minimum api-version: 2020-06-01."]
     #[serde(rename = "assignedHost", default, skip_serializing_if = "Option::is_none")]
@@ -14106,7 +14826,12 @@ impl VirtualMachineScaleSetVmListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineScaleSetVmNetworkProfileConfiguration {
     #[doc = "The list of network configurations."]
-    #[serde(rename = "networkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_configurations: Vec<VirtualMachineScaleSetNetworkConfiguration>,
 }
 impl VirtualMachineScaleSetVmNetworkProfileConfiguration {
@@ -14283,7 +15008,11 @@ impl VirtualMachineSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineSizeListResult {
     #[doc = "The list of virtual machine sizes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineSize>,
 }
 impl azure_core::Continuable for VirtualMachineSizeListResult {
@@ -14313,7 +15042,11 @@ pub struct VirtualMachineSoftwarePatchProperties {
     #[serde(rename = "kbId", default, skip_serializing_if = "Option::is_none")]
     pub kb_id: Option<String>,
     #[doc = "The classification(s) of the patch as provided by the patch publisher."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications: Vec<String>,
     #[doc = "Describes the reboot requirements of the patch."]
     #[serde(rename = "rebootBehavior", default, skip_serializing_if = "Option::is_none")]
@@ -14447,7 +15180,11 @@ pub struct VirtualMachineUpdate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<VirtualMachineIdentity>,
     #[doc = "The virtual machine zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl VirtualMachineUpdate {
@@ -14459,7 +15196,11 @@ impl VirtualMachineUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmImagesInEdgeZoneListResult {
     #[doc = "The list of VMImages in EdgeZone"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineImageResource>,
     #[doc = "The URI to fetch the next page of VMImages in EdgeZone. Call ListNext() with this URI to fetch the next page of VmImages."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14474,7 +15215,11 @@ impl VmImagesInEdgeZoneListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WinRmConfiguration {
     #[doc = "The list of Windows Remote Management listeners"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub listeners: Vec<WinRmListener>,
 }
 impl WinRmConfiguration {
@@ -14519,7 +15264,12 @@ pub struct WindowsConfiguration {
     #[serde(rename = "timeZone", default, skip_serializing_if = "Option::is_none")]
     pub time_zone: Option<String>,
     #[doc = "Specifies additional base-64 encoded XML formatted information that can be included in the Unattend.xml file, which is used by Windows Setup."]
-    #[serde(rename = "additionalUnattendContent", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalUnattendContent",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_unattend_content: Vec<AdditionalUnattendContent>,
     #[doc = "Specifies settings related to VM Guest Patching on Windows."]
     #[serde(rename = "patchSettings", default, skip_serializing_if = "Option::is_none")]
@@ -14537,13 +15287,28 @@ impl WindowsConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WindowsParameters {
     #[doc = "The update classifications to select when installing patches for Windows."]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
     #[doc = "Kbs to include in the patch operation"]
-    #[serde(rename = "kbNumbersToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_include: Vec<String>,
     #[doc = "Kbs to exclude in the patch operation"]
-    #[serde(rename = "kbNumbersToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_exclude: Vec<String>,
     #[doc = "Filters out Kbs that don't have an InstallationRebootBehavior of 'NeverReboots' when this is set to true."]
     #[serde(rename = "excludeKbsRequiringReboot", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/confidentialledger/src/package_2020_12_01_preview/models.rs b/services/mgmt/confidentialledger/src/package_2020_12_01_preview/models.rs
index a3d6ba255b..bacb747c29 100644
--- a/services/mgmt/confidentialledger/src/package_2020_12_01_preview/models.rs
+++ b/services/mgmt/confidentialledger/src/package_2020_12_01_preview/models.rs
@@ -58,7 +58,11 @@ impl ConfidentialLedger {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfidentialLedgerList {
     #[doc = "List of Confidential Ledgers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfidentialLedger>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -142,10 +146,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -196,10 +209,20 @@ pub struct LedgerProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "Array of all AAD based Security Principals."]
-    #[serde(rename = "aadBasedSecurityPrincipals", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aadBasedSecurityPrincipals",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aad_based_security_principals: Vec<AadBasedSecurityPrincipal>,
     #[doc = "Array of all cert based Security Principals."]
-    #[serde(rename = "certBasedSecurityPrincipals", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certBasedSecurityPrincipals",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cert_based_security_principals: Vec<CertBasedSecurityPrincipal>,
 }
 impl LedgerProperties {
@@ -369,7 +392,11 @@ impl ResourceProviderOperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "Resource provider operations list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperationDefinition>,
     #[doc = "The URI that can be used to request the next page for list of Azure operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/confidentialledger/src/package_2021_05_13_preview/models.rs b/services/mgmt/confidentialledger/src/package_2021_05_13_preview/models.rs
index e9d72d63d7..17dd1cbf26 100644
--- a/services/mgmt/confidentialledger/src/package_2021_05_13_preview/models.rs
+++ b/services/mgmt/confidentialledger/src/package_2021_05_13_preview/models.rs
@@ -131,7 +131,11 @@ impl ConfidentialLedger {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfidentialLedgerList {
     #[doc = "List of Confidential Ledgers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfidentialLedger>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -215,10 +219,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -266,10 +279,20 @@ pub struct LedgerProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "Array of all AAD based Security Principals."]
-    #[serde(rename = "aadBasedSecurityPrincipals", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aadBasedSecurityPrincipals",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aad_based_security_principals: Vec<AadBasedSecurityPrincipal>,
     #[doc = "Array of all cert based Security Principals."]
-    #[serde(rename = "certBasedSecurityPrincipals", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certBasedSecurityPrincipals",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cert_based_security_principals: Vec<CertBasedSecurityPrincipal>,
 }
 impl LedgerProperties {
@@ -439,7 +462,11 @@ impl ResourceProviderOperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "Resource provider operations list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperationDefinition>,
     #[doc = "The URI that can be used to request the next page for list of Azure operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/confidentialledger/src/package_2022_05_13/models.rs b/services/mgmt/confidentialledger/src/package_2022_05_13/models.rs
index e9d72d63d7..17dd1cbf26 100644
--- a/services/mgmt/confidentialledger/src/package_2022_05_13/models.rs
+++ b/services/mgmt/confidentialledger/src/package_2022_05_13/models.rs
@@ -131,7 +131,11 @@ impl ConfidentialLedger {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfidentialLedgerList {
     #[doc = "List of Confidential Ledgers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfidentialLedger>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -215,10 +219,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -266,10 +279,20 @@ pub struct LedgerProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "Array of all AAD based Security Principals."]
-    #[serde(rename = "aadBasedSecurityPrincipals", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aadBasedSecurityPrincipals",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aad_based_security_principals: Vec<AadBasedSecurityPrincipal>,
     #[doc = "Array of all cert based Security Principals."]
-    #[serde(rename = "certBasedSecurityPrincipals", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certBasedSecurityPrincipals",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cert_based_security_principals: Vec<CertBasedSecurityPrincipal>,
 }
 impl LedgerProperties {
@@ -439,7 +462,11 @@ impl ResourceProviderOperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "Resource provider operations list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperationDefinition>,
     #[doc = "The URI that can be used to request the next page for list of Azure operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/confluent/src/package_2020_03_01/models.rs b/services/mgmt/confluent/src/package_2020_03_01/models.rs
index 1916051004..4d68497786 100644
--- a/services/mgmt/confluent/src/package_2020_03_01/models.rs
+++ b/services/mgmt/confluent/src/package_2020_03_01/models.rs
@@ -61,7 +61,11 @@ impl ConfluentAgreementResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfluentAgreementResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfluentAgreementResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -91,7 +95,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Error detail"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -151,7 +159,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Confluent operations supported by the Microsoft.Confluent provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -217,7 +229,11 @@ impl OrganizationResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrganizationResourceListResult {
     #[doc = "Result of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OrganizationResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/confluent/src/package_2020_03_01_preview/models.rs b/services/mgmt/confluent/src/package_2020_03_01_preview/models.rs
index b567469773..3a8fb4db41 100644
--- a/services/mgmt/confluent/src/package_2020_03_01_preview/models.rs
+++ b/services/mgmt/confluent/src/package_2020_03_01_preview/models.rs
@@ -61,7 +61,11 @@ impl ConfluentAgreementResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfluentAgreementResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfluentAgreementResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -91,7 +95,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Error detail"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -151,7 +159,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Confluent operations supported by the Microsoft.Confluent provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -217,7 +229,11 @@ impl OrganizationResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrganizationResourceListResult {
     #[doc = "Result of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OrganizationResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/confluent/src/package_2021_03_01_preview/models.rs b/services/mgmt/confluent/src/package_2021_03_01_preview/models.rs
index 7f868a063a..3e5cebfd70 100644
--- a/services/mgmt/confluent/src/package_2021_03_01_preview/models.rs
+++ b/services/mgmt/confluent/src/package_2021_03_01_preview/models.rs
@@ -64,7 +64,11 @@ impl ConfluentAgreementResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfluentAgreementResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfluentAgreementResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -94,7 +98,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Error detail"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -160,7 +168,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Confluent operations supported by the Microsoft.Confluent provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -236,7 +248,11 @@ impl OrganizationResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrganizationResourceListResult {
     #[doc = "Result of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OrganizationResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/confluent/src/package_2021_12_01/models.rs b/services/mgmt/confluent/src/package_2021_12_01/models.rs
index 7f868a063a..3e5cebfd70 100644
--- a/services/mgmt/confluent/src/package_2021_12_01/models.rs
+++ b/services/mgmt/confluent/src/package_2021_12_01/models.rs
@@ -64,7 +64,11 @@ impl ConfluentAgreementResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfluentAgreementResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfluentAgreementResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -94,7 +98,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Error detail"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -160,7 +168,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Confluent operations supported by the Microsoft.Confluent provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -236,7 +248,11 @@ impl OrganizationResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrganizationResourceListResult {
     #[doc = "Result of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OrganizationResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/confluent/src/package_preview_2021_09/models.rs b/services/mgmt/confluent/src/package_preview_2021_09/models.rs
index 7f868a063a..3e5cebfd70 100644
--- a/services/mgmt/confluent/src/package_preview_2021_09/models.rs
+++ b/services/mgmt/confluent/src/package_preview_2021_09/models.rs
@@ -64,7 +64,11 @@ impl ConfluentAgreementResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfluentAgreementResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfluentAgreementResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -94,7 +98,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Error detail"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -160,7 +168,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Confluent operations supported by the Microsoft.Confluent provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -236,7 +248,11 @@ impl OrganizationResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrganizationResourceListResult {
     #[doc = "Result of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OrganizationResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/connectedvmware/src/package_2020_10_01_preview/models.rs b/services/mgmt/connectedvmware/src/package_2020_10_01_preview/models.rs
index ca190ebd1c..5e1ae4316f 100644
--- a/services/mgmt/connectedvmware/src/package_2020_10_01_preview/models.rs
+++ b/services/mgmt/connectedvmware/src/package_2020_10_01_preview/models.rs
@@ -77,16 +77,30 @@ pub struct ClusterProperties {
     #[serde(rename = "moName", default, skip_serializing_if = "Option::is_none")]
     pub mo_name: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets the name of the corresponding resource in Kubernetes."]
     #[serde(rename = "customResourceName", default, skip_serializing_if = "Option::is_none")]
     pub custom_resource_name: Option<String>,
     #[doc = "Gets or sets the datastore ARM ids."]
-    #[serde(rename = "datastoreIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "datastoreIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastore_ids: Vec<String>,
     #[doc = "Gets or sets the network ARM ids."]
-    #[serde(rename = "networkIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_ids: Vec<String>,
     #[doc = "Gets or sets the provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -222,7 +236,11 @@ pub struct DatastoreProperties {
     #[serde(rename = "moName", default, skip_serializing_if = "Option::is_none")]
     pub mo_name: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets the name of the corresponding resource in Kubernetes."]
     #[serde(rename = "customResourceName", default, skip_serializing_if = "Option::is_none")]
@@ -362,7 +380,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -380,7 +402,11 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Additional error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
 }
 impl ErrorDetail {
@@ -521,7 +547,12 @@ pub struct GuestAgentProfile {
     #[serde(rename = "agentVersion", default, skip_serializing_if = "Option::is_none")]
     pub agent_version: Option<String>,
     #[doc = "Details about the error state."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<ErrorDetail>,
 }
 impl GuestAgentProfile {
@@ -593,7 +624,11 @@ pub struct GuestAgentProperties {
     #[serde(rename = "customResourceName", default, skip_serializing_if = "Option::is_none")]
     pub custom_resource_name: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets or sets the provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -726,7 +761,11 @@ pub struct HostProperties {
     #[serde(rename = "moName", default, skip_serializing_if = "Option::is_none")]
     pub mo_name: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets the name of the corresponding resource in Kubernetes."]
     #[serde(rename = "customResourceName", default, skip_serializing_if = "Option::is_none")]
@@ -1286,7 +1325,11 @@ impl MachineExtensionUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MachineExtensionsListResult {
     #[doc = "The list of extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MachineExtension>,
     #[doc = "The uri to fetch the next page of machine extensions. Call ListNext() with this to fetch the next page of extensions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1364,7 +1407,12 @@ pub struct NetworkInterface {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Gets or sets the nic ip addresses."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "Gets or sets the NIC MAC address."]
     #[serde(rename = "macAddress", default, skip_serializing_if = "Option::is_none")]
@@ -1424,7 +1472,12 @@ impl NetworkInterfaceUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfile {
     #[doc = "Gets or sets the list of network interfaces associated with the virtual machine."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
 }
 impl NetworkProfile {
@@ -1436,7 +1489,12 @@ impl NetworkProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfileUpdate {
     #[doc = "Gets or sets the list of network interfaces associated with the virtual machine."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterfaceUpdate>,
 }
 impl NetworkProfileUpdate {
@@ -1469,10 +1527,19 @@ pub struct NicIpSettings {
     #[serde(rename = "allocationMethod", default, skip_serializing_if = "Option::is_none")]
     pub allocation_method: Option<IpAddressAllocationMethod>,
     #[doc = "Gets or sets the dns servers."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
     #[doc = "Gets or sets the gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gateway: Vec<String>,
     #[doc = "Gets or sets the ip address for the nic."]
     #[serde(rename = "ipAddress", default, skip_serializing_if = "Option::is_none")]
@@ -1487,7 +1554,12 @@ pub struct NicIpSettings {
     #[serde(rename = "secondaryWinsServer", default, skip_serializing_if = "Option::is_none")]
     pub secondary_wins_server: Option<String>,
     #[doc = "Gets or sets the IP address information being reported for this NIC. This contains the same IPv4 information above plus IPV6 information."]
-    #[serde(rename = "ipAddressInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddressInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_address_info: Vec<NicIpAddressSettings>,
 }
 impl NicIpSettings {
@@ -1811,7 +1883,11 @@ pub struct ResourcePoolProperties {
     #[serde(rename = "customResourceName", default, skip_serializing_if = "Option::is_none")]
     pub custom_resource_name: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets or sets the provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1979,10 +2055,19 @@ impl StopVirtualMachineOptions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageProfile {
     #[doc = "Gets or sets the list of virtual disks associated with the virtual machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<VirtualDisk>,
     #[doc = "Gets or sets the list of virtual SCSI controllers associated with the virtual machine."]
-    #[serde(rename = "scsiControllers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scsiControllers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scsi_controllers: Vec<VirtualScsiController>,
 }
 impl StorageProfile {
@@ -1994,7 +2079,11 @@ impl StorageProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageProfileUpdate {
     #[doc = "Gets or sets the list of virtual disks associated with the virtual machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<VirtualDiskUpdate>,
 }
 impl StorageProfileUpdate {
@@ -2073,7 +2162,11 @@ pub struct VCenterProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub credentials: Option<ViCredential>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets or sets the provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2262,7 +2355,12 @@ pub struct VirtualMachineInventoryItem {
     #[serde(rename = "osName", default, skip_serializing_if = "Option::is_none")]
     pub os_name: Option<String>,
     #[doc = "Gets or sets the nic ip addresses."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "Gets or sets the folder path of the vm."]
     #[serde(rename = "folderPath", default, skip_serializing_if = "Option::is_none")]
@@ -2372,7 +2470,11 @@ pub struct VirtualMachineProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub uuid: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets or sets the provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2504,10 +2606,19 @@ pub struct VirtualMachineTemplateProperties {
     #[serde(rename = "folderPath", default, skip_serializing_if = "Option::is_none")]
     pub folder_path: Option<String>,
     #[doc = "Gets or sets the network interfaces of the template."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
     #[doc = "Gets or sets the disks the template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<VirtualDisk>,
     #[doc = "Gets the name of the corresponding resource in Kubernetes."]
     #[serde(rename = "customResourceName", default, skip_serializing_if = "Option::is_none")]
@@ -2522,7 +2633,11 @@ pub struct VirtualMachineTemplateProperties {
     #[serde(rename = "firmwareType", default, skip_serializing_if = "Option::is_none")]
     pub firmware_type: Option<FirmwareType>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets or sets the provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2686,7 +2801,11 @@ pub struct VirtualNetworkProperties {
     #[serde(rename = "customResourceName", default, skip_serializing_if = "Option::is_none")]
     pub custom_resource_name: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets or sets the provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/connectedvmware/src/package_2022_01_10_preview/models.rs b/services/mgmt/connectedvmware/src/package_2022_01_10_preview/models.rs
index 70c62a5f42..b1dad84cdb 100644
--- a/services/mgmt/connectedvmware/src/package_2022_01_10_preview/models.rs
+++ b/services/mgmt/connectedvmware/src/package_2022_01_10_preview/models.rs
@@ -113,16 +113,30 @@ pub struct ClusterProperties {
     #[serde(rename = "moName", default, skip_serializing_if = "Option::is_none")]
     pub mo_name: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets the name of the corresponding resource in Kubernetes."]
     #[serde(rename = "customResourceName", default, skip_serializing_if = "Option::is_none")]
     pub custom_resource_name: Option<String>,
     #[doc = "Gets or sets the datastore ARM ids."]
-    #[serde(rename = "datastoreIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "datastoreIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastore_ids: Vec<String>,
     #[doc = "Gets or sets the network ARM ids."]
-    #[serde(rename = "networkIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_ids: Vec<String>,
     #[doc = "Gets or sets the provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -258,7 +272,11 @@ pub struct DatastoreProperties {
     #[serde(rename = "moName", default, skip_serializing_if = "Option::is_none")]
     pub mo_name: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets the name of the corresponding resource in Kubernetes."]
     #[serde(rename = "customResourceName", default, skip_serializing_if = "Option::is_none")]
@@ -398,7 +416,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -416,7 +438,11 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Additional error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
 }
 impl ErrorDetail {
@@ -557,7 +583,12 @@ pub struct GuestAgentProfile {
     #[serde(rename = "agentVersion", default, skip_serializing_if = "Option::is_none")]
     pub agent_version: Option<String>,
     #[doc = "Details about the error state."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<ErrorDetail>,
 }
 impl GuestAgentProfile {
@@ -629,7 +660,11 @@ pub struct GuestAgentProperties {
     #[serde(rename = "customResourceName", default, skip_serializing_if = "Option::is_none")]
     pub custom_resource_name: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets or sets the provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -762,7 +797,11 @@ pub struct HostProperties {
     #[serde(rename = "moName", default, skip_serializing_if = "Option::is_none")]
     pub mo_name: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets the name of the corresponding resource in Kubernetes."]
     #[serde(rename = "customResourceName", default, skip_serializing_if = "Option::is_none")]
@@ -1122,13 +1161,28 @@ impl Serialize for InventoryType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinuxParameters {
     #[doc = "The update classifications to select when installing patches for Linux."]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
     #[doc = "packages to include in the patch operation. Format: packageName_packageVersion"]
-    #[serde(rename = "packageNameMasksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_include: Vec<String>,
     #[doc = "packages to exclude in the patch operation. Format: packageName_packageVersion"]
-    #[serde(rename = "packageNameMasksToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_exclude: Vec<String>,
 }
 impl LinuxParameters {
@@ -1346,7 +1400,11 @@ impl MachineExtensionUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MachineExtensionsListResult {
     #[doc = "The list of extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MachineExtension>,
     #[doc = "The uri to fetch the next page of machine extensions. Call ListNext() with this to fetch the next page of extensions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1424,7 +1482,12 @@ pub struct NetworkInterface {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Gets or sets the nic ip addresses."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "Gets or sets the NIC MAC address."]
     #[serde(rename = "macAddress", default, skip_serializing_if = "Option::is_none")]
@@ -1484,7 +1547,12 @@ impl NetworkInterfaceUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfile {
     #[doc = "Gets or sets the list of network interfaces associated with the virtual machine."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
 }
 impl NetworkProfile {
@@ -1496,7 +1564,12 @@ impl NetworkProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfileUpdate {
     #[doc = "Gets or sets the list of network interfaces associated with the virtual machine."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterfaceUpdate>,
 }
 impl NetworkProfileUpdate {
@@ -1529,10 +1602,19 @@ pub struct NicIpSettings {
     #[serde(rename = "allocationMethod", default, skip_serializing_if = "Option::is_none")]
     pub allocation_method: Option<IpAddressAllocationMethod>,
     #[doc = "Gets or sets the dns servers."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
     #[doc = "Gets or sets the gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gateway: Vec<String>,
     #[doc = "Gets or sets the ip address for the nic."]
     #[serde(rename = "ipAddress", default, skip_serializing_if = "Option::is_none")]
@@ -1547,7 +1629,12 @@ pub struct NicIpSettings {
     #[serde(rename = "secondaryWinsServer", default, skip_serializing_if = "Option::is_none")]
     pub secondary_wins_server: Option<String>,
     #[doc = "Gets or sets the IP address information being reported for this NIC. This contains the same IPv4 information above plus IPV6 information."]
-    #[serde(rename = "ipAddressInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddressInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_address_info: Vec<NicIpAddressSettings>,
 }
 impl NicIpSettings {
@@ -1967,7 +2054,11 @@ pub struct ResourcePoolProperties {
     #[serde(rename = "customResourceName", default, skip_serializing_if = "Option::is_none")]
     pub custom_resource_name: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets or sets the provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2147,10 +2238,19 @@ impl StopVirtualMachineOptions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageProfile {
     #[doc = "Gets or sets the list of virtual disks associated with the virtual machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<VirtualDisk>,
     #[doc = "Gets or sets the list of virtual SCSI controllers associated with the virtual machine."]
-    #[serde(rename = "scsiControllers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scsiControllers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scsi_controllers: Vec<VirtualScsiController>,
 }
 impl StorageProfile {
@@ -2162,7 +2262,11 @@ impl StorageProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageProfileUpdate {
     #[doc = "Gets or sets the list of virtual disks associated with the virtual machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<VirtualDiskUpdate>,
 }
 impl StorageProfileUpdate {
@@ -2253,7 +2357,11 @@ pub struct VCenterProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub credentials: Option<ViCredential>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets or sets the provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2984,7 +3092,12 @@ pub struct VirtualMachineInventoryItem {
     #[serde(rename = "osName", default, skip_serializing_if = "Option::is_none")]
     pub os_name: Option<String>,
     #[doc = "Gets or sets the nic ip addresses."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "Gets or sets the folder path of the vm."]
     #[serde(rename = "folderPath", default, skip_serializing_if = "Option::is_none")]
@@ -3097,7 +3210,11 @@ pub struct VirtualMachineProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub uuid: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets or sets the provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3229,10 +3346,19 @@ pub struct VirtualMachineTemplateProperties {
     #[serde(rename = "folderPath", default, skip_serializing_if = "Option::is_none")]
     pub folder_path: Option<String>,
     #[doc = "Gets or sets the network interfaces of the template."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
     #[doc = "Gets or sets the disks the template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<VirtualDisk>,
     #[doc = "Gets the name of the corresponding resource in Kubernetes."]
     #[serde(rename = "customResourceName", default, skip_serializing_if = "Option::is_none")]
@@ -3247,7 +3373,11 @@ pub struct VirtualMachineTemplateProperties {
     #[serde(rename = "firmwareType", default, skip_serializing_if = "Option::is_none")]
     pub firmware_type: Option<FirmwareType>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets or sets the provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3414,7 +3544,11 @@ pub struct VirtualNetworkProperties {
     #[serde(rename = "customResourceName", default, skip_serializing_if = "Option::is_none")]
     pub custom_resource_name: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ResourceStatus>,
     #[doc = "Gets or sets the provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3515,13 +3649,28 @@ impl Serialize for VirtualScsiSharing {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WindowsParameters {
     #[doc = "The update classifications to select when installing patches for Windows."]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
     #[doc = "Kbs to include in the patch operation"]
-    #[serde(rename = "kbNumbersToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_include: Vec<String>,
     #[doc = "Kbs to exclude in the patch operation"]
-    #[serde(rename = "kbNumbersToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_exclude: Vec<String>,
     #[doc = "Filters out Kbs that don't have an InstallationRebootBehavior of 'NeverReboots' when this is set to true."]
     #[serde(rename = "excludeKbsRequiringReboot", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/consumption/src/package_2019_10/models.rs b/services/mgmt/consumption/src/package_2019_10/models.rs
index f7f5eb28e1..75b0807bc6 100644
--- a/services/mgmt/consumption/src/package_2019_10/models.rs
+++ b/services/mgmt/consumption/src/package_2019_10/models.rs
@@ -77,10 +77,20 @@ pub struct BalanceProperties {
     #[serde(rename = "priceHidden", default, skip_serializing_if = "Option::is_none")]
     pub price_hidden: Option<bool>,
     #[doc = "List of new purchases."]
-    #[serde(rename = "newPurchasesDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "newPurchasesDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub new_purchases_details: Vec<serde_json::Value>,
     #[doc = "List of Adjustments (Promo credit, SIE credit etc.)."]
-    #[serde(rename = "adjustmentDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "adjustmentDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub adjustment_details: Vec<serde_json::Value>,
 }
 impl BalanceProperties {
@@ -201,7 +211,11 @@ pub mod budget_comparison_expression {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BudgetFilter {
     #[doc = "The logical \"AND\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub and: Vec<BudgetFilterProperties>,
     #[doc = "The Dimensions or Tags to filter a budget by."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -383,7 +397,11 @@ impl BudgetTimePeriod {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BudgetsListResult {
     #[doc = "The list of budgets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Budget>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -462,7 +480,11 @@ pub mod charge_summary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChargesListResult {
     #[doc = "The list of charge summary"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ChargeSummary>,
 }
 impl ChargesListResult {
@@ -726,7 +748,11 @@ impl EventSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Events {
     #[doc = "The list of event summary."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventSummary>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -776,7 +802,12 @@ pub struct ForecastProperties {
     #[serde(rename = "chargeType", default, skip_serializing_if = "Option::is_none")]
     pub charge_type: Option<forecast_properties::ChargeType>,
     #[doc = "The details about the forecast confidence levels. This is populated only when chargeType is Forecast."]
-    #[serde(rename = "confidenceLevels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "confidenceLevels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub confidence_levels: Vec<serde_json::Value>,
 }
 impl ForecastProperties {
@@ -882,7 +913,11 @@ impl ForecastSpend {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ForecastsListResult {
     #[doc = "The list of forecasts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Forecast>,
 }
 impl azure_core::Continuable for ForecastsListResult {
@@ -1031,7 +1066,12 @@ pub struct LegacyReservationRecommendationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scope: Option<String>,
     #[doc = "List of sku properties"]
-    #[serde(rename = "skuProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_properties: Vec<SkuProperty>,
 }
 impl LegacyReservationRecommendationProperties {
@@ -1372,7 +1412,11 @@ impl LotSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Lots {
     #[doc = "The list of lot summary."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LotSummary>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1414,13 +1458,27 @@ pub struct ManagementGroupAggregatedCostProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub currency: Option<String>,
     #[doc = "Children of a management group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<ManagementGroupAggregatedCostResult>,
     #[doc = "List of subscription Guids included in the calculation of aggregated cost"]
-    #[serde(rename = "includedSubscriptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedSubscriptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_subscriptions: Vec<String>,
     #[doc = "List of subscription Guids excluded from the calculation of aggregated cost"]
-    #[serde(rename = "excludedSubscriptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedSubscriptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_subscriptions: Vec<String>,
 }
 impl ManagementGroupAggregatedCostProperties {
@@ -1547,7 +1605,11 @@ impl MarketplaceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MarketplacesListResult {
     #[doc = "The list of marketplaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Marketplace>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1744,7 +1806,12 @@ pub struct ModernReservationRecommendationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scope: Option<i32>,
     #[doc = "List of sku properties"]
-    #[serde(rename = "skuProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_properties: Vec<SkuProperty>,
     #[doc = "This is the ARM Sku name."]
     #[serde(rename = "skuName", default, skip_serializing_if = "Option::is_none")]
@@ -1850,7 +1917,11 @@ impl ModernReservationTransactionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ModernReservationTransactionsListResult {
     #[doc = "The list of reservation recommendations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ModernReservationTransaction>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2100,10 +2171,20 @@ pub struct Notification {
     #[serde(rename = "contactEmails")]
     pub contact_emails: Vec<String>,
     #[doc = "Contact roles to send the budget notification to when the threshold is exceeded."]
-    #[serde(rename = "contactRoles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contactRoles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contact_roles: Vec<String>,
     #[doc = "Action groups to send the budget notification to when the threshold is exceeded. Must be provided as a fully qualified Azure resource id. Only supported at Subscription or Resource Group scopes."]
-    #[serde(rename = "contactGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contactGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contact_groups: Vec<String>,
     #[doc = "The type of threshold"]
     #[serde(rename = "thresholdType", default, skip_serializing_if = "Option::is_none")]
@@ -2350,7 +2431,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of consumption operations supported by the Microsoft.Consumption resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2371,7 +2456,11 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PriceSheetModel {
     #[doc = "Price sheet"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pricesheets: Vec<PriceSheetProperties>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2531,7 +2620,11 @@ impl ReservationDetailProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationDetailsListResult {
     #[doc = "The list of reservation details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationDetail>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2690,7 +2783,12 @@ impl ReservationRecommendationDetailsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationRecommendationDetailsResourceProperties {
     #[doc = "List of subscriptions for which the reservation is applied."]
-    #[serde(rename = "appliedScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appliedScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applied_scopes: Vec<String>,
     #[doc = "On demand rate of the resource."]
     #[serde(rename = "onDemandRate", default, skip_serializing_if = "Option::is_none")]
@@ -2717,7 +2815,12 @@ impl ReservationRecommendationDetailsResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationRecommendationDetailsSavingsProperties {
     #[doc = "List of calculated savings."]
-    #[serde(rename = "calculatedSavings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "calculatedSavings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub calculated_savings: Vec<ReservationRecommendationDetailsCalculatedSavingsProperties>,
     #[doc = "Number of days of usage to look back used for computing the recommendation."]
     #[serde(rename = "lookBackPeriod", default, skip_serializing_if = "Option::is_none")]
@@ -2753,7 +2856,12 @@ pub struct ReservationRecommendationDetailsUsageProperties {
     #[serde(rename = "lookBackUnitType", default, skip_serializing_if = "Option::is_none")]
     pub look_back_unit_type: Option<String>,
     #[doc = "The breakdown of historical resource usage.  The values are in the order of usage between the firstConsumptionDate and the lastConsumptionDate."]
-    #[serde(rename = "usageData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "usageData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub usage_data: Vec<f64>,
     #[doc = "The grain of the values represented in the usage data ex: hourly."]
     #[serde(rename = "usageGrain", default, skip_serializing_if = "Option::is_none")]
@@ -2768,7 +2876,11 @@ impl ReservationRecommendationDetailsUsageProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationRecommendationsListResult {
     #[doc = "The list of reservation recommendations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationRecommendation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2795,7 +2907,11 @@ impl ReservationRecommendationsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationSummariesListResult {
     #[doc = "The list of reservation summaries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationSummary>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2907,7 +3023,11 @@ pub struct ReservationTransactionResource {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "Resource tags."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
 }
 impl ReservationTransactionResource {
@@ -2919,7 +3039,11 @@ impl ReservationTransactionResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationTransactionsListResult {
     #[doc = "The list of reservation recommendations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationTransaction>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3021,7 +3145,11 @@ pub struct Tag {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub key: Option<String>,
     #[doc = "Tag values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl Tag {
@@ -3033,7 +3161,11 @@ impl Tag {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagProperties {
     #[doc = "A list of Tag."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<Tag>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3123,7 +3255,11 @@ pub mod usage_detail {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageDetailsListResult {
     #[doc = "The list of usage details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UsageDetail>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/consumption/src/package_2021_10/models.rs b/services/mgmt/consumption/src/package_2021_10/models.rs
index 944e759933..d7b24619d4 100644
--- a/services/mgmt/consumption/src/package_2021_10/models.rs
+++ b/services/mgmt/consumption/src/package_2021_10/models.rs
@@ -77,10 +77,20 @@ pub struct BalanceProperties {
     #[serde(rename = "priceHidden", default, skip_serializing_if = "Option::is_none")]
     pub price_hidden: Option<bool>,
     #[doc = "List of new purchases."]
-    #[serde(rename = "newPurchasesDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "newPurchasesDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub new_purchases_details: Vec<serde_json::Value>,
     #[doc = "List of Adjustments (Promo credit, SIE credit etc.)."]
-    #[serde(rename = "adjustmentDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "adjustmentDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub adjustment_details: Vec<serde_json::Value>,
 }
 impl BalanceProperties {
@@ -201,7 +211,11 @@ pub mod budget_comparison_expression {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BudgetFilter {
     #[doc = "The logical \"AND\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub and: Vec<BudgetFilterProperties>,
     #[doc = "The comparison expression to be used in the budgets."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -380,7 +394,11 @@ impl BudgetTimePeriod {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BudgetsListResult {
     #[doc = "The list of budgets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Budget>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -459,7 +477,11 @@ pub mod charge_summary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChargesListResult {
     #[doc = "The list of charge summary"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ChargeSummary>,
 }
 impl ChargesListResult {
@@ -743,7 +765,11 @@ impl EventSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Events {
     #[doc = "The list of event summary."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventSummary>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -909,7 +935,12 @@ pub struct LegacyReservationRecommendationProperties {
     #[doc = "Shared or single recommendation."]
     pub scope: String,
     #[doc = "List of sku properties"]
-    #[serde(rename = "skuProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_properties: Vec<SkuProperty>,
 }
 impl LegacyReservationRecommendationProperties {
@@ -1416,7 +1447,11 @@ impl LotSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Lots {
     #[doc = "The list of lot summary."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LotSummary>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1458,13 +1493,27 @@ pub struct ManagementGroupAggregatedCostProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub currency: Option<String>,
     #[doc = "Children of a management group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<ManagementGroupAggregatedCostResult>,
     #[doc = "List of subscription Guids included in the calculation of aggregated cost"]
-    #[serde(rename = "includedSubscriptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedSubscriptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_subscriptions: Vec<String>,
     #[doc = "List of subscription Guids excluded from the calculation of aggregated cost"]
-    #[serde(rename = "excludedSubscriptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedSubscriptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_subscriptions: Vec<String>,
 }
 impl ManagementGroupAggregatedCostProperties {
@@ -1591,7 +1640,11 @@ impl MarketplaceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MarketplacesListResult {
     #[doc = "The list of marketplaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Marketplace>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1788,7 +1841,12 @@ pub struct ModernReservationRecommendationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scope: Option<String>,
     #[doc = "List of sku properties"]
-    #[serde(rename = "skuProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_properties: Vec<SkuProperty>,
     #[doc = "This is the ARM Sku name."]
     #[serde(rename = "skuName", default, skip_serializing_if = "Option::is_none")]
@@ -1888,7 +1946,11 @@ impl ModernReservationTransactionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ModernReservationTransactionsListResult {
     #[doc = "The list of reservation recommendations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ModernReservationTransaction>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2199,10 +2261,20 @@ pub struct Notification {
     #[serde(rename = "contactEmails")]
     pub contact_emails: Vec<String>,
     #[doc = "Contact roles to send the budget notification to when the threshold is exceeded."]
-    #[serde(rename = "contactRoles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contactRoles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contact_roles: Vec<String>,
     #[doc = "Action groups to send the budget notification to when the threshold is exceeded. Must be provided as a fully qualified Azure resource id. Only supported at Subscription or Resource Group scopes."]
-    #[serde(rename = "contactGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contactGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contact_groups: Vec<String>,
     #[doc = "The type of threshold"]
     #[serde(rename = "thresholdType", default, skip_serializing_if = "Option::is_none")]
@@ -2451,7 +2523,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of consumption operations supported by the Microsoft.Consumption resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2472,7 +2548,11 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PriceSheetModel {
     #[doc = "Price sheet"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pricesheets: Vec<PriceSheetProperties>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2632,7 +2712,11 @@ impl ReservationDetailProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationDetailsListResult {
     #[doc = "The list of reservation details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationDetail>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2791,7 +2875,12 @@ impl ReservationRecommendationDetailsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationRecommendationDetailsResourceProperties {
     #[doc = "List of subscriptions for which the reservation is applied."]
-    #[serde(rename = "appliedScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appliedScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applied_scopes: Vec<String>,
     #[doc = "On demand rate of the resource."]
     #[serde(rename = "onDemandRate", default, skip_serializing_if = "Option::is_none")]
@@ -2818,7 +2907,12 @@ impl ReservationRecommendationDetailsResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationRecommendationDetailsSavingsProperties {
     #[doc = "List of calculated savings."]
-    #[serde(rename = "calculatedSavings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "calculatedSavings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub calculated_savings: Vec<ReservationRecommendationDetailsCalculatedSavingsProperties>,
     #[doc = "Number of days of usage to look back used for computing the recommendation."]
     #[serde(rename = "lookBackPeriod", default, skip_serializing_if = "Option::is_none")]
@@ -2854,7 +2948,12 @@ pub struct ReservationRecommendationDetailsUsageProperties {
     #[serde(rename = "lookBackUnitType", default, skip_serializing_if = "Option::is_none")]
     pub look_back_unit_type: Option<String>,
     #[doc = "The breakdown of historical resource usage.  The values are in the order of usage between the firstConsumptionDate and the lastConsumptionDate."]
-    #[serde(rename = "usageData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "usageData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub usage_data: Vec<f64>,
     #[doc = "The grain of the values represented in the usage data ex: hourly."]
     #[serde(rename = "usageGrain", default, skip_serializing_if = "Option::is_none")]
@@ -2869,7 +2968,11 @@ impl ReservationRecommendationDetailsUsageProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationRecommendationsListResult {
     #[doc = "The list of reservation recommendations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationRecommendation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2893,7 +2996,11 @@ impl ReservationRecommendationsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationSummariesListResult {
     #[doc = "The list of reservation summaries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationSummary>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3005,7 +3112,11 @@ pub struct ReservationTransactionResource {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "Resource tags."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
 }
 impl ReservationTransactionResource {
@@ -3017,7 +3128,11 @@ impl ReservationTransactionResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationTransactionsListResult {
     #[doc = "The list of reservation recommendations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationTransaction>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3095,7 +3210,11 @@ pub struct Tag {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub key: Option<String>,
     #[doc = "Tag values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl Tag {
@@ -3107,7 +3226,11 @@ impl Tag {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagProperties {
     #[doc = "A list of Tag."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<Tag>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3197,7 +3320,11 @@ pub mod usage_detail {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageDetailsListResult {
     #[doc = "The list of usage details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UsageDetail>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/consumption/src/package_preview_2018_11/models.rs b/services/mgmt/consumption/src/package_preview_2018_11/models.rs
index 6da05b1777..d67f5b8d4c 100644
--- a/services/mgmt/consumption/src/package_preview_2018_11/models.rs
+++ b/services/mgmt/consumption/src/package_preview_2018_11/models.rs
@@ -87,19 +87,38 @@ pub struct BillingAccountProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub agreements: Option<String>,
     #[doc = "The invoiceSections associated to the billing account."]
-    #[serde(rename = "invoiceSections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "invoiceSections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub invoice_sections: Vec<InvoiceSection>,
     #[doc = "The billing profiles associated to the billing account."]
-    #[serde(rename = "billingProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "billingProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub billing_profiles: Vec<BillingProfile>,
     #[doc = "Current entity level details"]
     #[serde(rename = "enrollmentDetails", default, skip_serializing_if = "Option::is_none")]
     pub enrollment_details: Option<Enrollment>,
     #[doc = "The departments associated to the enrollment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub departments: Vec<Department>,
     #[doc = "The accounts associated to the enrollment."]
-    #[serde(rename = "enrollmentAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enrollmentAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enrollment_accounts: Vec<EnrollmentAccount>,
 }
 impl BillingAccountProperties {
@@ -242,7 +261,11 @@ impl ChargeSummaryProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChargesListByBillingAccount {
     #[doc = "The list of charge summary by billing account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ChargeSummaryByBillingAccount>,
 }
 impl ChargesListByBillingAccount {
@@ -254,7 +277,11 @@ impl ChargesListByBillingAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChargesListByBillingProfile {
     #[doc = "The list of charge summary by billing profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ChargeSummaryByBillingProfile>,
 }
 impl ChargesListByBillingProfile {
@@ -266,7 +293,11 @@ impl ChargesListByBillingProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChargesListByInvoiceSection {
     #[doc = "The list of charge summary by invoiceSection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ChargeSummaryByInvoiceSection>,
 }
 impl ChargesListByInvoiceSection {
@@ -351,7 +382,12 @@ pub struct DepartmentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "Associated enrollment accounts. By default this is not populated, unless it's specified in $expand."]
-    #[serde(rename = "enrollmentAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enrollmentAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enrollment_accounts: Vec<EnrollmentAccount>,
 }
 impl DepartmentProperties {
@@ -604,7 +640,11 @@ impl EventSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Events {
     #[doc = "The list of event summary."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventSummary>,
 }
 impl Events {
@@ -633,7 +673,12 @@ pub struct InvoiceSectionProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The billing profiles associated to the billing account."]
-    #[serde(rename = "billingProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "billingProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub billing_profiles: Vec<BillingProfile>,
 }
 impl InvoiceSectionProperties {
@@ -726,7 +771,11 @@ impl LotSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Lots {
     #[doc = "The list of lot summary."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LotSummary>,
 }
 impl Lots {
@@ -774,7 +823,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of consumption operations supported by the Microsoft.Consumption resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/consumption/src/package_preview_2019_04/models.rs b/services/mgmt/consumption/src/package_preview_2019_04/models.rs
index 8323a262aa..b94958b80a 100644
--- a/services/mgmt/consumption/src/package_preview_2019_04/models.rs
+++ b/services/mgmt/consumption/src/package_preview_2019_04/models.rs
@@ -60,10 +60,20 @@ pub struct BalanceProperties {
     #[serde(rename = "priceHidden", default, skip_serializing_if = "Option::is_none")]
     pub price_hidden: Option<bool>,
     #[doc = "List of new purchases."]
-    #[serde(rename = "newPurchasesDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "newPurchasesDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub new_purchases_details: Vec<serde_json::Value>,
     #[doc = "List of Adjustments (Promo credit, SIE credit etc.)."]
-    #[serde(rename = "adjustmentDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "adjustmentDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub adjustment_details: Vec<serde_json::Value>,
 }
 impl BalanceProperties {
@@ -269,7 +279,11 @@ impl BudgetTimePeriod {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BudgetsListResult {
     #[doc = "The list of budgets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Budget>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -334,7 +348,11 @@ impl ChargeSummaryProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChargesListResult {
     #[doc = "The list of charge summary"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ChargeSummary>,
 }
 impl ChargesListResult {
@@ -409,13 +427,26 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Filters {
     #[doc = "The list of filters on resource groups, allowed at subscription level only."]
-    #[serde(rename = "resourceGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_groups: Vec<String>,
     #[doc = "The list of filters on resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
     #[doc = "The list of filters on meters (GUID), mandatory for budgets of usage category. "]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meters: Vec<String>,
     #[doc = "The dictionary of filters on tags."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -459,7 +490,12 @@ pub struct ForecastProperties {
     #[serde(rename = "chargeType", default, skip_serializing_if = "Option::is_none")]
     pub charge_type: Option<forecast_properties::ChargeType>,
     #[doc = "The details about the forecast confidence levels. This is populated only when chargeType is Forecast."]
-    #[serde(rename = "confidenceLevels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "confidenceLevels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub confidence_levels: Vec<serde_json::Value>,
 }
 impl ForecastProperties {
@@ -550,7 +586,11 @@ pub mod forecast_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ForecastsListResult {
     #[doc = "The list of forecasts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Forecast>,
 }
 impl azure_core::Continuable for ForecastsListResult {
@@ -589,13 +629,27 @@ pub struct ManagementGroupAggregatedCostProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub currency: Option<String>,
     #[doc = "Children of a management group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<ManagementGroupAggregatedCostResult>,
     #[doc = "List of subscription Guids included in the calculation of aggregated cost"]
-    #[serde(rename = "includedSubscriptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedSubscriptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_subscriptions: Vec<String>,
     #[doc = "List of subscription Guids excluded from the calculation of aggregated cost"]
-    #[serde(rename = "excludedSubscriptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedSubscriptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_subscriptions: Vec<String>,
 }
 impl ManagementGroupAggregatedCostProperties {
@@ -719,7 +773,11 @@ impl MarketplaceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MarketplacesListResult {
     #[doc = "The list of marketplaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Marketplace>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -809,10 +867,20 @@ pub struct Notification {
     #[serde(rename = "contactEmails")]
     pub contact_emails: Vec<String>,
     #[doc = "Contact roles to send the budget notification to when the threshold is exceeded."]
-    #[serde(rename = "contactRoles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contactRoles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contact_roles: Vec<String>,
     #[doc = "Action groups to send the budget notification to when the threshold is exceeded."]
-    #[serde(rename = "contactGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contactGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contact_groups: Vec<String>,
 }
 impl Notification {
@@ -909,7 +977,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of consumption operations supported by the Microsoft.Consumption resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -930,7 +1002,11 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PriceSheetModel {
     #[doc = "Price sheet"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pricesheets: Vec<PriceSheetProperties>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1063,7 +1139,11 @@ impl ReservationDetailProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationDetailsListResult {
     #[doc = "The list of reservation details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationDetail>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1136,7 +1216,11 @@ impl ReservationRecommendationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationRecommendationsListResult {
     #[doc = "The list of reservation recommendations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationRecommendation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1157,7 +1241,11 @@ impl ReservationRecommendationsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationSummariesListResult {
     #[doc = "The list of reservation summaries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationSummary>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1276,7 +1364,11 @@ impl Tag {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagProperties {
     #[doc = "A list of Tag."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<Tag>,
 }
 impl TagProperties {
@@ -1465,7 +1557,11 @@ impl UsageDetailsDownloadResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageDetailsListResult {
     #[doc = "The list of usage details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UsageDetail>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/consumption/src/package_preview_2019_05/models.rs b/services/mgmt/consumption/src/package_preview_2019_05/models.rs
index 8323a262aa..b94958b80a 100644
--- a/services/mgmt/consumption/src/package_preview_2019_05/models.rs
+++ b/services/mgmt/consumption/src/package_preview_2019_05/models.rs
@@ -60,10 +60,20 @@ pub struct BalanceProperties {
     #[serde(rename = "priceHidden", default, skip_serializing_if = "Option::is_none")]
     pub price_hidden: Option<bool>,
     #[doc = "List of new purchases."]
-    #[serde(rename = "newPurchasesDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "newPurchasesDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub new_purchases_details: Vec<serde_json::Value>,
     #[doc = "List of Adjustments (Promo credit, SIE credit etc.)."]
-    #[serde(rename = "adjustmentDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "adjustmentDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub adjustment_details: Vec<serde_json::Value>,
 }
 impl BalanceProperties {
@@ -269,7 +279,11 @@ impl BudgetTimePeriod {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BudgetsListResult {
     #[doc = "The list of budgets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Budget>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -334,7 +348,11 @@ impl ChargeSummaryProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChargesListResult {
     #[doc = "The list of charge summary"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ChargeSummary>,
 }
 impl ChargesListResult {
@@ -409,13 +427,26 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Filters {
     #[doc = "The list of filters on resource groups, allowed at subscription level only."]
-    #[serde(rename = "resourceGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_groups: Vec<String>,
     #[doc = "The list of filters on resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
     #[doc = "The list of filters on meters (GUID), mandatory for budgets of usage category. "]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meters: Vec<String>,
     #[doc = "The dictionary of filters on tags."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -459,7 +490,12 @@ pub struct ForecastProperties {
     #[serde(rename = "chargeType", default, skip_serializing_if = "Option::is_none")]
     pub charge_type: Option<forecast_properties::ChargeType>,
     #[doc = "The details about the forecast confidence levels. This is populated only when chargeType is Forecast."]
-    #[serde(rename = "confidenceLevels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "confidenceLevels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub confidence_levels: Vec<serde_json::Value>,
 }
 impl ForecastProperties {
@@ -550,7 +586,11 @@ pub mod forecast_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ForecastsListResult {
     #[doc = "The list of forecasts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Forecast>,
 }
 impl azure_core::Continuable for ForecastsListResult {
@@ -589,13 +629,27 @@ pub struct ManagementGroupAggregatedCostProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub currency: Option<String>,
     #[doc = "Children of a management group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<ManagementGroupAggregatedCostResult>,
     #[doc = "List of subscription Guids included in the calculation of aggregated cost"]
-    #[serde(rename = "includedSubscriptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedSubscriptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_subscriptions: Vec<String>,
     #[doc = "List of subscription Guids excluded from the calculation of aggregated cost"]
-    #[serde(rename = "excludedSubscriptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedSubscriptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_subscriptions: Vec<String>,
 }
 impl ManagementGroupAggregatedCostProperties {
@@ -719,7 +773,11 @@ impl MarketplaceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MarketplacesListResult {
     #[doc = "The list of marketplaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Marketplace>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -809,10 +867,20 @@ pub struct Notification {
     #[serde(rename = "contactEmails")]
     pub contact_emails: Vec<String>,
     #[doc = "Contact roles to send the budget notification to when the threshold is exceeded."]
-    #[serde(rename = "contactRoles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contactRoles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contact_roles: Vec<String>,
     #[doc = "Action groups to send the budget notification to when the threshold is exceeded."]
-    #[serde(rename = "contactGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contactGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contact_groups: Vec<String>,
 }
 impl Notification {
@@ -909,7 +977,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of consumption operations supported by the Microsoft.Consumption resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -930,7 +1002,11 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PriceSheetModel {
     #[doc = "Price sheet"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pricesheets: Vec<PriceSheetProperties>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1063,7 +1139,11 @@ impl ReservationDetailProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationDetailsListResult {
     #[doc = "The list of reservation details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationDetail>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1136,7 +1216,11 @@ impl ReservationRecommendationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationRecommendationsListResult {
     #[doc = "The list of reservation recommendations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationRecommendation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1157,7 +1241,11 @@ impl ReservationRecommendationsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationSummariesListResult {
     #[doc = "The list of reservation summaries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationSummary>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1276,7 +1364,11 @@ impl Tag {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagProperties {
     #[doc = "A list of Tag."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<Tag>,
 }
 impl TagProperties {
@@ -1465,7 +1557,11 @@ impl UsageDetailsDownloadResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageDetailsListResult {
     #[doc = "The list of usage details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UsageDetail>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/containerinstance/src/package_2020_11/models.rs b/services/mgmt/containerinstance/src/package_2020_11/models.rs
index 0e38c175e5..fdc99e889e 100644
--- a/services/mgmt/containerinstance/src/package_2020_11/models.rs
+++ b/services/mgmt/containerinstance/src/package_2020_11/models.rs
@@ -33,7 +33,11 @@ impl AzureFileVolume {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CachedImagesListResult {
     #[doc = "The list of cached images."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CachedImages>,
     #[doc = "The URI to fetch the next page of cached images."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -102,7 +106,11 @@ pub mod capabilities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesListResult {
     #[doc = "The list of capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Capabilities>,
     #[doc = "The URI to fetch the next page of capabilities."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -150,7 +158,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -190,7 +202,11 @@ impl ContainerAttachResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerExec {
     #[doc = "The commands to execute within the container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
 }
 impl ContainerExec {
@@ -274,7 +290,12 @@ pub mod container_group {
         #[doc = "The containers within the container group."]
         pub containers: Vec<Container>,
         #[doc = "The image registry credentials by which the container group is created from."]
-        #[serde(rename = "imageRegistryCredentials", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "imageRegistryCredentials",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub image_registry_credentials: Vec<ImageRegistryCredential>,
         #[doc = "Restart policy for all containers within the container group. \n- `Always` Always restart\n- `OnFailure` Restart on failure\n- `Never` Never restart\n"]
         #[serde(rename = "restartPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -286,7 +307,11 @@ pub mod container_group {
         #[serde(rename = "osType")]
         pub os_type: properties::OsType,
         #[doc = "The list of volumes that can be mounted by containers in this container group."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub volumes: Vec<Volume>,
         #[doc = "The instance view of the container group. Only valid in response."]
         #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
@@ -307,7 +332,12 @@ pub mod container_group {
         #[serde(rename = "encryptionProperties", default, skip_serializing_if = "Option::is_none")]
         pub encryption_properties: Option<EncryptionProperties>,
         #[doc = "The init containers for a container group."]
-        #[serde(rename = "initContainers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "initContainers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub init_containers: Vec<InitContainerDefinition>,
     }
     impl Properties {
@@ -412,7 +442,11 @@ pub mod container_group {
         #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
         pub struct InstanceView {
             #[doc = "The events of this container group."]
-            #[serde(default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub events: Vec<Event>,
             #[doc = "The state of the container group. Only valid in response."]
             #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -474,7 +508,11 @@ pub mod container_group_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerGroupListResult {
     #[doc = "The list of container groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContainerGroup>,
     #[doc = "The URI to fetch the next page of container groups."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -551,7 +589,12 @@ pub struct ContainerHttpGet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scheme: Option<container_http_get::Scheme>,
     #[doc = "The HTTP headers."]
-    #[serde(rename = "httpHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_headers: Vec<HttpHeader>,
 }
 impl ContainerHttpGet {
@@ -698,13 +741,26 @@ pub struct ContainerProperties {
     #[doc = "The name of the image used to create the container instance."]
     pub image: String,
     #[doc = "The commands to execute within the container instance in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "The exposed ports on the container instance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<ContainerPort>,
     #[doc = "The environment variables to set in the container instance."]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The instance view of the container instance. Only valid in response."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
@@ -712,7 +768,12 @@ pub struct ContainerProperties {
     #[doc = "The resource requirements."]
     pub resources: ResourceRequirements,
     #[doc = "The volume mounts available to the container instance."]
-    #[serde(rename = "volumeMounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeMounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_mounts: Vec<VolumeMount>,
     #[doc = "The container probe, for liveness or readiness"]
     #[serde(rename = "livenessProbe", default, skip_serializing_if = "Option::is_none")]
@@ -751,7 +812,11 @@ pub mod container_properties {
         #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
         pub previous_state: Option<ContainerState>,
         #[doc = "The events of the container instance."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub events: Vec<Event>,
     }
     impl InstanceView {
@@ -1015,16 +1080,30 @@ pub struct InitContainerPropertiesDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub image: Option<String>,
     #[doc = "The command to execute within the init container in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "The environment variables to set in the init container."]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The instance view of the init container. Only valid in response."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<init_container_properties_definition::InstanceView>,
     #[doc = "The volume mounts available to the init container."]
-    #[serde(rename = "volumeMounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeMounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_mounts: Vec<VolumeMount>,
 }
 impl InitContainerPropertiesDefinition {
@@ -1047,7 +1126,11 @@ pub mod init_container_properties_definition {
         #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
         pub previous_state: Option<ContainerState>,
         #[doc = "The events of the init container."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub events: Vec<Event>,
     }
     impl InstanceView {
@@ -1296,7 +1379,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URI to fetch the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1497,7 +1584,11 @@ pub mod usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "The usage data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResult {
diff --git a/services/mgmt/containerinstance/src/package_2021_03/models.rs b/services/mgmt/containerinstance/src/package_2021_03/models.rs
index e49e153a18..90b63ca52e 100644
--- a/services/mgmt/containerinstance/src/package_2021_03/models.rs
+++ b/services/mgmt/containerinstance/src/package_2021_03/models.rs
@@ -33,7 +33,11 @@ impl AzureFileVolume {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CachedImagesListResult {
     #[doc = "The list of cached images."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CachedImages>,
     #[doc = "The URI to fetch the next page of cached images."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -102,7 +106,11 @@ pub mod capabilities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesListResult {
     #[doc = "The list of capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Capabilities>,
     #[doc = "The URI to fetch the next page of capabilities."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -150,7 +158,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -190,7 +202,11 @@ impl ContainerAttachResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerExec {
     #[doc = "The commands to execute within the container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
 }
 impl ContainerExec {
@@ -274,7 +290,12 @@ pub mod container_group {
         #[doc = "The containers within the container group."]
         pub containers: Vec<Container>,
         #[doc = "The image registry credentials by which the container group is created from."]
-        #[serde(rename = "imageRegistryCredentials", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "imageRegistryCredentials",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub image_registry_credentials: Vec<ImageRegistryCredential>,
         #[doc = "Restart policy for all containers within the container group. \n- `Always` Always restart\n- `OnFailure` Restart on failure\n- `Never` Never restart\n"]
         #[serde(rename = "restartPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -286,7 +307,11 @@ pub mod container_group {
         #[serde(rename = "osType")]
         pub os_type: properties::OsType,
         #[doc = "The list of volumes that can be mounted by containers in this container group."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub volumes: Vec<Volume>,
         #[doc = "The instance view of the container group. Only valid in response."]
         #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
@@ -307,7 +332,12 @@ pub mod container_group {
         #[serde(rename = "encryptionProperties", default, skip_serializing_if = "Option::is_none")]
         pub encryption_properties: Option<EncryptionProperties>,
         #[doc = "The init containers for a container group."]
-        #[serde(rename = "initContainers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "initContainers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub init_containers: Vec<InitContainerDefinition>,
     }
     impl Properties {
@@ -412,7 +442,11 @@ pub mod container_group {
         #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
         pub struct InstanceView {
             #[doc = "The events of this container group."]
-            #[serde(default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub events: Vec<Event>,
             #[doc = "The state of the container group. Only valid in response."]
             #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -474,7 +508,11 @@ pub mod container_group_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerGroupListResult {
     #[doc = "The list of container groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContainerGroup>,
     #[doc = "The URI to fetch the next page of container groups."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -551,7 +589,12 @@ pub struct ContainerHttpGet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scheme: Option<container_http_get::Scheme>,
     #[doc = "The HTTP headers."]
-    #[serde(rename = "httpHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_headers: Vec<HttpHeader>,
 }
 impl ContainerHttpGet {
@@ -698,13 +741,26 @@ pub struct ContainerProperties {
     #[doc = "The name of the image used to create the container instance."]
     pub image: String,
     #[doc = "The commands to execute within the container instance in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "The exposed ports on the container instance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<ContainerPort>,
     #[doc = "The environment variables to set in the container instance."]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The instance view of the container instance. Only valid in response."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
@@ -712,7 +768,12 @@ pub struct ContainerProperties {
     #[doc = "The resource requirements."]
     pub resources: ResourceRequirements,
     #[doc = "The volume mounts available to the container instance."]
-    #[serde(rename = "volumeMounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeMounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_mounts: Vec<VolumeMount>,
     #[doc = "The container probe, for liveness or readiness"]
     #[serde(rename = "livenessProbe", default, skip_serializing_if = "Option::is_none")]
@@ -751,7 +812,11 @@ pub mod container_properties {
         #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
         pub previous_state: Option<ContainerState>,
         #[doc = "The events of the container instance."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub events: Vec<Event>,
     }
     impl InstanceView {
@@ -1015,16 +1080,30 @@ pub struct InitContainerPropertiesDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub image: Option<String>,
     #[doc = "The command to execute within the init container in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "The environment variables to set in the init container."]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The instance view of the init container. Only valid in response."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<init_container_properties_definition::InstanceView>,
     #[doc = "The volume mounts available to the init container."]
-    #[serde(rename = "volumeMounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeMounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_mounts: Vec<VolumeMount>,
 }
 impl InitContainerPropertiesDefinition {
@@ -1047,7 +1126,11 @@ pub mod init_container_properties_definition {
         #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
         pub previous_state: Option<ContainerState>,
         #[doc = "The events of the init container."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub events: Vec<Event>,
     }
     impl InstanceView {
@@ -1296,7 +1379,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URI to fetch the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1497,7 +1584,11 @@ pub mod usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "The usage data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResult {
diff --git a/services/mgmt/containerinstance/src/package_2021_07/models.rs b/services/mgmt/containerinstance/src/package_2021_07/models.rs
index 99ade9d81d..3ef9e2e7ca 100644
--- a/services/mgmt/containerinstance/src/package_2021_07/models.rs
+++ b/services/mgmt/containerinstance/src/package_2021_07/models.rs
@@ -33,7 +33,11 @@ impl AzureFileVolume {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CachedImagesListResult {
     #[doc = "The list of cached images."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CachedImages>,
     #[doc = "The URI to fetch the next page of cached images."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -102,7 +106,11 @@ pub mod capabilities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesListResult {
     #[doc = "The list of capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Capabilities>,
     #[doc = "The URI to fetch the next page of capabilities."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -150,7 +158,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -190,7 +202,11 @@ impl ContainerAttachResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerExec {
     #[doc = "The commands to execute within the container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
 }
 impl ContainerExec {
@@ -274,7 +290,12 @@ pub mod container_group {
         #[doc = "The containers within the container group."]
         pub containers: Vec<Container>,
         #[doc = "The image registry credentials by which the container group is created from."]
-        #[serde(rename = "imageRegistryCredentials", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "imageRegistryCredentials",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub image_registry_credentials: Vec<ImageRegistryCredential>,
         #[doc = "Restart policy for all containers within the container group. \n- `Always` Always restart\n- `OnFailure` Restart on failure\n- `Never` Never restart\n"]
         #[serde(rename = "restartPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -286,7 +307,11 @@ pub mod container_group {
         #[serde(rename = "osType")]
         pub os_type: properties::OsType,
         #[doc = "The list of volumes that can be mounted by containers in this container group."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub volumes: Vec<Volume>,
         #[doc = "The instance view of the container group. Only valid in response."]
         #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
@@ -295,7 +320,12 @@ pub mod container_group {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub diagnostics: Option<ContainerGroupDiagnostics>,
         #[doc = "The subnet resource IDs for a container group."]
-        #[serde(rename = "subnetIds", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "subnetIds",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub subnet_ids: Vec<ContainerGroupSubnetId>,
         #[doc = "DNS configuration for the container group."]
         #[serde(rename = "dnsConfig", default, skip_serializing_if = "Option::is_none")]
@@ -307,7 +337,12 @@ pub mod container_group {
         #[serde(rename = "encryptionProperties", default, skip_serializing_if = "Option::is_none")]
         pub encryption_properties: Option<EncryptionProperties>,
         #[doc = "The init containers for a container group."]
-        #[serde(rename = "initContainers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "initContainers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub init_containers: Vec<InitContainerDefinition>,
     }
     impl Properties {
@@ -412,7 +447,11 @@ pub mod container_group {
         #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
         pub struct InstanceView {
             #[doc = "The events of this container group."]
-            #[serde(default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub events: Vec<Event>,
             #[doc = "The state of the container group. Only valid in response."]
             #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -474,7 +513,11 @@ pub mod container_group_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerGroupListResult {
     #[doc = "The list of container groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContainerGroup>,
     #[doc = "The URI to fetch the next page of container groups."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -554,7 +597,12 @@ pub struct ContainerHttpGet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scheme: Option<container_http_get::Scheme>,
     #[doc = "The HTTP headers."]
-    #[serde(rename = "httpHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_headers: Vec<HttpHeader>,
 }
 impl ContainerHttpGet {
@@ -701,13 +749,26 @@ pub struct ContainerProperties {
     #[doc = "The name of the image used to create the container instance."]
     pub image: String,
     #[doc = "The commands to execute within the container instance in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "The exposed ports on the container instance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<ContainerPort>,
     #[doc = "The environment variables to set in the container instance."]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The instance view of the container instance. Only valid in response."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
@@ -715,7 +776,12 @@ pub struct ContainerProperties {
     #[doc = "The resource requirements."]
     pub resources: ResourceRequirements,
     #[doc = "The volume mounts available to the container instance."]
-    #[serde(rename = "volumeMounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeMounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_mounts: Vec<VolumeMount>,
     #[doc = "The container probe, for liveness or readiness"]
     #[serde(rename = "livenessProbe", default, skip_serializing_if = "Option::is_none")]
@@ -754,7 +820,11 @@ pub mod container_properties {
         #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
         pub previous_state: Option<ContainerState>,
         #[doc = "The events of the container instance."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub events: Vec<Event>,
     }
     impl InstanceView {
@@ -1026,16 +1096,30 @@ pub struct InitContainerPropertiesDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub image: Option<String>,
     #[doc = "The command to execute within the init container in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "The environment variables to set in the init container."]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The instance view of the init container. Only valid in response."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<init_container_properties_definition::InstanceView>,
     #[doc = "The volume mounts available to the init container."]
-    #[serde(rename = "volumeMounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeMounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_mounts: Vec<VolumeMount>,
 }
 impl InitContainerPropertiesDefinition {
@@ -1058,7 +1142,11 @@ pub mod init_container_properties_definition {
         #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
         pub previous_state: Option<ContainerState>,
         #[doc = "The events of the init container."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub events: Vec<Event>,
     }
     impl InstanceView {
@@ -1308,7 +1396,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URI to fetch the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1509,7 +1601,11 @@ pub mod usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "The usage data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResult {
diff --git a/services/mgmt/containerinstance/src/package_2021_09/models.rs b/services/mgmt/containerinstance/src/package_2021_09/models.rs
index 72d97f61a3..cd113ff58c 100644
--- a/services/mgmt/containerinstance/src/package_2021_09/models.rs
+++ b/services/mgmt/containerinstance/src/package_2021_09/models.rs
@@ -33,7 +33,11 @@ impl AzureFileVolume {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CachedImagesListResult {
     #[doc = "The list of cached images."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CachedImages>,
     #[doc = "The URI to fetch the next page of cached images."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -102,7 +106,11 @@ pub mod capabilities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesListResult {
     #[doc = "The list of capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Capabilities>,
     #[doc = "The URI to fetch the next page of capabilities."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -150,7 +158,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -190,7 +202,11 @@ impl ContainerAttachResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerExec {
     #[doc = "The commands to execute within the container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
 }
 impl ContainerExec {
@@ -311,7 +327,11 @@ pub mod container_group_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerGroupListResult {
     #[doc = "The list of container groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContainerGroup>,
     #[doc = "The URI to fetch the next page of container groups."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -356,7 +376,12 @@ pub mod container_group_properties {
         #[doc = "The containers within the container group."]
         pub containers: Vec<Container>,
         #[doc = "The image registry credentials by which the container group is created from."]
-        #[serde(rename = "imageRegistryCredentials", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "imageRegistryCredentials",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub image_registry_credentials: Vec<ImageRegistryCredential>,
         #[doc = "Restart policy for all containers within the container group. \n- `Always` Always restart\n- `OnFailure` Restart on failure\n- `Never` Never restart\n"]
         #[serde(rename = "restartPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -368,7 +393,11 @@ pub mod container_group_properties {
         #[serde(rename = "osType")]
         pub os_type: properties::OsType,
         #[doc = "The list of volumes that can be mounted by containers in this container group."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub volumes: Vec<Volume>,
         #[doc = "The instance view of the container group. Only valid in response."]
         #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
@@ -377,7 +406,12 @@ pub mod container_group_properties {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub diagnostics: Option<ContainerGroupDiagnostics>,
         #[doc = "The subnet resource IDs for a container group."]
-        #[serde(rename = "subnetIds", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "subnetIds",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub subnet_ids: Vec<ContainerGroupSubnetId>,
         #[doc = "DNS configuration for the container group."]
         #[serde(rename = "dnsConfig", default, skip_serializing_if = "Option::is_none")]
@@ -389,7 +423,12 @@ pub mod container_group_properties {
         #[serde(rename = "encryptionProperties", default, skip_serializing_if = "Option::is_none")]
         pub encryption_properties: Option<EncryptionProperties>,
         #[doc = "The init containers for a container group."]
-        #[serde(rename = "initContainers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "initContainers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub init_containers: Vec<InitContainerDefinition>,
     }
     impl Properties {
@@ -494,7 +533,11 @@ pub mod container_group_properties {
         #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
         pub struct InstanceView {
             #[doc = "The events of this container group."]
-            #[serde(default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub events: Vec<Event>,
             #[doc = "The state of the container group. Only valid in response."]
             #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -570,7 +613,12 @@ pub struct ContainerHttpGet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scheme: Option<container_http_get::Scheme>,
     #[doc = "The HTTP headers."]
-    #[serde(rename = "httpHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_headers: Vec<HttpHeader>,
 }
 impl ContainerHttpGet {
@@ -717,13 +765,26 @@ pub struct ContainerProperties {
     #[doc = "The name of the image used to create the container instance."]
     pub image: String,
     #[doc = "The commands to execute within the container instance in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "The exposed ports on the container instance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<ContainerPort>,
     #[doc = "The environment variables to set in the container instance."]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The instance view of the container instance. Only valid in response."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
@@ -731,7 +792,12 @@ pub struct ContainerProperties {
     #[doc = "The resource requirements."]
     pub resources: ResourceRequirements,
     #[doc = "The volume mounts available to the container instance."]
-    #[serde(rename = "volumeMounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeMounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_mounts: Vec<VolumeMount>,
     #[doc = "The container probe, for liveness or readiness"]
     #[serde(rename = "livenessProbe", default, skip_serializing_if = "Option::is_none")]
@@ -770,7 +836,11 @@ pub mod container_properties {
         #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
         pub previous_state: Option<ContainerState>,
         #[doc = "The events of the container instance."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub events: Vec<Event>,
     }
     impl InstanceView {
@@ -1043,16 +1113,30 @@ pub struct InitContainerPropertiesDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub image: Option<String>,
     #[doc = "The command to execute within the init container in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "The environment variables to set in the init container."]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The instance view of the init container. Only valid in response."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<init_container_properties_definition::InstanceView>,
     #[doc = "The volume mounts available to the init container."]
-    #[serde(rename = "volumeMounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeMounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_mounts: Vec<VolumeMount>,
 }
 impl InitContainerPropertiesDefinition {
@@ -1075,7 +1159,11 @@ pub mod init_container_properties_definition {
         #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
         pub previous_state: Option<ContainerState>,
         #[doc = "The events of the init container."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub events: Vec<Event>,
     }
     impl InstanceView {
@@ -1325,7 +1413,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URI to fetch the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1417,7 +1509,11 @@ pub struct Resource {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<serde_json::Value>,
     #[doc = "The zones for the container group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl Resource {
@@ -1532,7 +1628,11 @@ pub mod usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "The usage data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResult {
diff --git a/services/mgmt/containerinstance/src/package_2021_10/models.rs b/services/mgmt/containerinstance/src/package_2021_10/models.rs
index 1fe07b1e9f..359e436063 100644
--- a/services/mgmt/containerinstance/src/package_2021_10/models.rs
+++ b/services/mgmt/containerinstance/src/package_2021_10/models.rs
@@ -33,7 +33,11 @@ impl AzureFileVolume {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CachedImagesListResult {
     #[doc = "The list of cached images."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CachedImages>,
     #[doc = "The URI to fetch the next page of cached images."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -102,7 +106,11 @@ pub mod capabilities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesListResult {
     #[doc = "The list of capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Capabilities>,
     #[doc = "The URI to fetch the next page of capabilities."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -150,7 +158,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -190,7 +202,11 @@ impl ContainerAttachResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerExec {
     #[doc = "The commands to execute within the container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
 }
 impl ContainerExec {
@@ -311,7 +327,11 @@ pub mod container_group_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerGroupListResult {
     #[doc = "The list of container groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContainerGroup>,
     #[doc = "The URI to fetch the next page of container groups."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -356,7 +376,12 @@ pub mod container_group_properties {
         #[doc = "The containers within the container group."]
         pub containers: Vec<Container>,
         #[doc = "The image registry credentials by which the container group is created from."]
-        #[serde(rename = "imageRegistryCredentials", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "imageRegistryCredentials",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub image_registry_credentials: Vec<ImageRegistryCredential>,
         #[doc = "Restart policy for all containers within the container group. \n- `Always` Always restart\n- `OnFailure` Restart on failure\n- `Never` Never restart\n"]
         #[serde(rename = "restartPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -368,7 +393,11 @@ pub mod container_group_properties {
         #[serde(rename = "osType")]
         pub os_type: properties::OsType,
         #[doc = "The list of volumes that can be mounted by containers in this container group."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub volumes: Vec<Volume>,
         #[doc = "The instance view of the container group. Only valid in response."]
         #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
@@ -377,7 +406,12 @@ pub mod container_group_properties {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub diagnostics: Option<ContainerGroupDiagnostics>,
         #[doc = "The subnet resource IDs for a container group."]
-        #[serde(rename = "subnetIds", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "subnetIds",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub subnet_ids: Vec<ContainerGroupSubnetId>,
         #[doc = "DNS configuration for the container group."]
         #[serde(rename = "dnsConfig", default, skip_serializing_if = "Option::is_none")]
@@ -389,7 +423,12 @@ pub mod container_group_properties {
         #[serde(rename = "encryptionProperties", default, skip_serializing_if = "Option::is_none")]
         pub encryption_properties: Option<EncryptionProperties>,
         #[doc = "The init containers for a container group."]
-        #[serde(rename = "initContainers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "initContainers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub init_containers: Vec<InitContainerDefinition>,
     }
     impl Properties {
@@ -494,7 +533,11 @@ pub mod container_group_properties {
         #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
         pub struct InstanceView {
             #[doc = "The events of this container group."]
-            #[serde(default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub events: Vec<Event>,
             #[doc = "The state of the container group. Only valid in response."]
             #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -570,7 +613,12 @@ pub struct ContainerHttpGet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scheme: Option<container_http_get::Scheme>,
     #[doc = "The HTTP headers."]
-    #[serde(rename = "httpHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_headers: Vec<HttpHeader>,
 }
 impl ContainerHttpGet {
@@ -717,13 +765,26 @@ pub struct ContainerProperties {
     #[doc = "The name of the image used to create the container instance."]
     pub image: String,
     #[doc = "The commands to execute within the container instance in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "The exposed ports on the container instance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<ContainerPort>,
     #[doc = "The environment variables to set in the container instance."]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The instance view of the container instance. Only valid in response."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
@@ -731,7 +792,12 @@ pub struct ContainerProperties {
     #[doc = "The resource requirements."]
     pub resources: ResourceRequirements,
     #[doc = "The volume mounts available to the container instance."]
-    #[serde(rename = "volumeMounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeMounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_mounts: Vec<VolumeMount>,
     #[doc = "The container probe, for liveness or readiness"]
     #[serde(rename = "livenessProbe", default, skip_serializing_if = "Option::is_none")]
@@ -770,7 +836,11 @@ pub mod container_properties {
         #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
         pub previous_state: Option<ContainerState>,
         #[doc = "The events of the container instance."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub events: Vec<Event>,
     }
     impl InstanceView {
@@ -1043,16 +1113,30 @@ pub struct InitContainerPropertiesDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub image: Option<String>,
     #[doc = "The command to execute within the init container in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "The environment variables to set in the init container."]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The instance view of the init container. Only valid in response."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<init_container_properties_definition::InstanceView>,
     #[doc = "The volume mounts available to the init container."]
-    #[serde(rename = "volumeMounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeMounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_mounts: Vec<VolumeMount>,
 }
 impl InitContainerPropertiesDefinition {
@@ -1075,7 +1159,11 @@ pub mod init_container_properties_definition {
         #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
         pub previous_state: Option<ContainerState>,
         #[doc = "The events of the init container."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub events: Vec<Event>,
     }
     impl InstanceView {
@@ -1381,7 +1469,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URI to fetch the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1473,7 +1565,11 @@ pub struct Resource {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<serde_json::Value>,
     #[doc = "The zones for the container group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl Resource {
@@ -1588,7 +1684,11 @@ pub mod usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "The usage data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResult {
diff --git a/services/mgmt/containerregistry/src/package_2021_06_preview/models.rs b/services/mgmt/containerregistry/src/package_2021_06_preview/models.rs
index 1f67017a62..e9f0e65d63 100644
--- a/services/mgmt/containerregistry/src/package_2021_06_preview/models.rs
+++ b/services/mgmt/containerregistry/src/package_2021_06_preview/models.rs
@@ -103,7 +103,11 @@ impl AgentPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentPoolListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AgentPool>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -829,7 +833,11 @@ impl ConnectedRegistry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectedRegistryListResult {
     #[doc = "The list of connected registries. Since this list may be incomplete, the nextLink field should be used to request the next list of connected registries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectedRegistry>,
     #[doc = "The URI that can be used to request the next list of connected registries."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -869,7 +877,12 @@ pub struct ConnectedRegistryProperties {
     #[doc = "The properties of the connected registry parent."]
     pub parent: ParentProperties,
     #[doc = "The list of the ACR token resource IDs used to authenticate clients to the connected registry."]
-    #[serde(rename = "clientTokenIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientTokenIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_token_ids: Vec<String>,
     #[doc = "The login server properties of the connected registry."]
     #[serde(rename = "loginServer", default, skip_serializing_if = "Option::is_none")]
@@ -878,7 +891,12 @@ pub struct ConnectedRegistryProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub logging: Option<LoggingProperties>,
     #[doc = "The list of current statuses of the connected registry."]
-    #[serde(rename = "statusDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_details: Vec<StatusDetailProperties>,
 }
 impl ConnectedRegistryProperties {
@@ -1046,7 +1064,12 @@ pub struct ConnectedRegistryUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub logging: Option<LoggingProperties>,
     #[doc = "The list of the ACR token resource IDs used to authenticate clients to the connected registry."]
-    #[serde(rename = "clientTokenIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientTokenIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_token_ids: Vec<String>,
 }
 impl ConnectedRegistryUpdateProperties {
@@ -1093,7 +1116,12 @@ pub struct DockerBuildRequest {
     #[serde(flatten)]
     pub run_request: RunRequest,
     #[doc = "The fully qualified image names including the repository and tag."]
-    #[serde(rename = "imageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_names: Vec<String>,
     #[doc = "The value of this property indicates whether the image built should be pushed to the registry or not."]
     #[serde(rename = "isPushEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -1108,7 +1136,11 @@ pub struct DockerBuildRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The collection of override arguments to be used when executing the run."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
     #[doc = "Run timeout in seconds."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1149,7 +1181,12 @@ pub struct DockerBuildStep {
     #[serde(flatten)]
     pub task_step_properties: TaskStepProperties,
     #[doc = "The fully qualified image names including the repository and tag."]
-    #[serde(rename = "imageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_names: Vec<String>,
     #[doc = "The value of this property indicates whether the image built should be pushed to the registry or not."]
     #[serde(rename = "isPushEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -1164,7 +1201,11 @@ pub struct DockerBuildStep {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The collection of override arguments to be used when executing this build step."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
 }
 impl DockerBuildStep {
@@ -1186,7 +1227,12 @@ pub struct DockerBuildStepUpdateParameters {
     #[serde(flatten)]
     pub task_step_update_parameters: TaskStepUpdateParameters,
     #[doc = "The fully qualified image names including the repository and tag."]
-    #[serde(rename = "imageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_names: Vec<String>,
     #[doc = "The value of this property indicates whether the image built should be pushed to the registry or not."]
     #[serde(rename = "isPushEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -1198,7 +1244,11 @@ pub struct DockerBuildStepUpdateParameters {
     #[serde(rename = "dockerFilePath", default, skip_serializing_if = "Option::is_none")]
     pub docker_file_path: Option<String>,
     #[doc = "The collection of override arguments to be used when executing this build step."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
     #[doc = "The name of the target build stage for the docker build."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1229,7 +1279,11 @@ pub struct EncodedTaskRunRequest {
     #[serde(rename = "encodedValuesContent", default, skip_serializing_if = "Option::is_none")]
     pub encoded_values_content: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
     #[doc = "Run timeout in seconds."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1273,7 +1327,11 @@ pub struct EncodedTaskStep {
     #[serde(rename = "encodedValuesContent", default, skip_serializing_if = "Option::is_none")]
     pub encoded_values_content: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl EncodedTaskStep {
@@ -1298,7 +1356,11 @@ pub struct EncodedTaskStepUpdateParameters {
     #[serde(rename = "encodedValuesContent", default, skip_serializing_if = "Option::is_none")]
     pub encoded_values_content: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl EncodedTaskStepUpdateParameters {
@@ -1395,7 +1457,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "an array of additional nested error response info objects, as described by this contract."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<InnerErrorDescription>,
 }
 impl ErrorResponseBody {
@@ -1471,7 +1537,11 @@ impl EventInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventListResult {
     #[doc = "The list of events. Since this list may be incomplete, the nextLink field should be used to request the next list of events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Event>,
     #[doc = "The URI that can be used to request the next list of events."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1560,7 +1630,11 @@ impl ExportPipeline {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExportPipelineListResult {
     #[doc = "The list of export pipelines. Since this list may be incomplete, the nextLink field should be used to request the next list of export pipelines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExportPipeline>,
     #[doc = "The URI that can be used to request the next list of pipeline runs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1583,7 +1657,11 @@ pub struct ExportPipelineProperties {
     #[doc = "The properties of the export pipeline target."]
     pub target: ExportPipelineTargetProperties,
     #[doc = "The list of all options configured for the pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub options: Vec<String>,
     #[doc = "The provisioning state of the pipeline at the time the operation was called."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1739,7 +1817,11 @@ pub struct FileTaskRunRequest {
     #[serde(rename = "valuesFilePath", default, skip_serializing_if = "Option::is_none")]
     pub values_file_path: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
     #[doc = "Run timeout in seconds."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1783,7 +1865,11 @@ pub struct FileTaskStep {
     #[serde(rename = "valuesFilePath", default, skip_serializing_if = "Option::is_none")]
     pub values_file_path: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl FileTaskStep {
@@ -1808,7 +1894,11 @@ pub struct FileTaskStepUpdateParameters {
     #[serde(rename = "valuesFilePath", default, skip_serializing_if = "Option::is_none")]
     pub values_file_path: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl FileTaskStepUpdateParameters {
@@ -1888,7 +1978,11 @@ pub struct GenerateCredentialsResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub username: Option<String>,
     #[doc = "The list of passwords for a container registry."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<TokenPassword>,
 }
 impl GenerateCredentialsResult {
@@ -2017,7 +2111,11 @@ pub struct ImageUpdateTrigger {
     #[serde(default, with = "azure_core::date::rfc3339::option")]
     pub timestamp: Option<time::OffsetDateTime>,
     #[doc = "The list of image updates that caused the build."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub images: Vec<ImageDescriptor>,
 }
 impl ImageUpdateTrigger {
@@ -2029,10 +2127,20 @@ impl ImageUpdateTrigger {
 pub struct ImportImageParameters {
     pub source: ImportSource,
     #[doc = "List of strings of the form repo[:tag]. When tag is omitted the source will be used (or 'latest' if source tag is also omitted)."]
-    #[serde(rename = "targetTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_tags: Vec<String>,
     #[doc = "List of strings of repository names to do a manifest only copy. No tag will be created."]
-    #[serde(rename = "untaggedTargetRepositories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "untaggedTargetRepositories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub untagged_target_repositories: Vec<String>,
     #[doc = "When Force, any existing target tags will be overwritten. When NoForce, any existing target tags will fail the operation before any copying begins."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2117,7 +2225,11 @@ impl ImportPipeline {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImportPipelineListResult {
     #[doc = "The list of import pipelines. Since this list may be incomplete, the nextLink field should be used to request the next list of import pipelines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImportPipeline>,
     #[doc = "The URI that can be used to request the next list of pipeline runs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2142,7 +2254,11 @@ pub struct ImportPipelineProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub trigger: Option<PipelineTriggerProperties>,
     #[doc = "The list of all options configured for the pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub options: Vec<String>,
     #[doc = "The provisioning state of the pipeline at the time the operation was called."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2481,10 +2597,20 @@ pub struct NetworkRuleSet {
     #[serde(rename = "defaultAction")]
     pub default_action: network_rule_set::DefaultAction,
     #[doc = "The virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "The IP ACL rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
 }
 impl NetworkRuleSet {
@@ -2590,7 +2716,11 @@ impl OperationDisplayDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of container registry operations. Since this list may be incomplete, the nextLink field should be used to request the next list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDefinition>,
     #[doc = "The URI that can be used to request the next list of container registry operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2668,10 +2798,20 @@ impl OperationPropertiesDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationServiceSpecificationDefinition {
     #[doc = "A list of Azure Monitoring metrics definition."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetricSpecificationDefinition>,
     #[doc = "A list of Azure Monitoring log definitions."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationLogSpecificationDefinition>,
 }
 impl OperationServiceSpecificationDefinition {
@@ -2688,13 +2828,21 @@ pub struct OverrideTaskStepProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub file: Option<String>,
     #[doc = "Gets or sets the collection of override arguments to be used when\r\nexecuting a build step."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
     #[doc = "The name of the target build stage for the docker build."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a Task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
     #[doc = "Base64 encoded update trigger token that will be attached with the base image trigger webhook."]
     #[serde(rename = "updateTriggerToken", default, skip_serializing_if = "Option::is_none")]
@@ -2738,7 +2886,11 @@ impl PipelineRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PipelineRunListResult {
     #[doc = "The list of pipeline runs. Since this list may be incomplete, the nextLink field should be used to request the next list of pipeline runs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PipelineRun>,
     #[doc = "The URI that can be used to request the next list of pipeline runs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2831,7 +2983,11 @@ pub struct PipelineRunRequest {
     #[serde(rename = "pipelineResourceId", default, skip_serializing_if = "Option::is_none")]
     pub pipeline_resource_id: Option<String>,
     #[doc = "List of source artifacts to be transferred by the pipeline. \r\nSpecify an image by repository ('hello-world'). This will use the 'latest' tag.\r\nSpecify an image by tag ('hello-world:latest').\r\nSpecify an image by sha256-based manifest digest ('hello-world@sha256:abc123')."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub source: Option<PipelineRunSourceProperties>,
@@ -2853,7 +3009,12 @@ pub struct PipelineRunResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "The artifacts imported in the pipeline run."]
-    #[serde(rename = "importedArtifacts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "importedArtifacts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub imported_artifacts: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub progress: Option<ProgressProperties>,
@@ -3433,7 +3594,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The list of private endpoint connections. Since this list may be incomplete, the nextLink field should be used to request the next list of private endpoint connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URI that can be used to request the next list of private endpoint connections."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3541,7 +3706,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "The list of private link resources. Since this list may be incomplete, the nextLink field should be used to request the next list of private link resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URI that can be used to request the next list of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3565,10 +3734,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -3819,7 +3998,11 @@ pub struct RegistryListCredentialsResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub username: Option<String>,
     #[doc = "The list of passwords for a container registry."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<RegistryPassword>,
 }
 impl RegistryListCredentialsResult {
@@ -3831,7 +4014,11 @@ impl RegistryListCredentialsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistryListResult {
     #[doc = "The list of container registries. Since this list may be incomplete, the nextLink field should be used to request the next list of container registries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Registry>,
     #[doc = "The URI that can be used to request the next list of container registries."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3945,10 +4132,20 @@ pub struct RegistryProperties {
     #[serde(rename = "dataEndpointEnabled", default, skip_serializing_if = "Option::is_none")]
     pub data_endpoint_enabled: Option<bool>,
     #[doc = "List of host names that will serve data when dataEndpointEnabled is true."]
-    #[serde(rename = "dataEndpointHostNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataEndpointHostNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_endpoint_host_names: Vec<String>,
     #[doc = "List of private endpoint connections for a container registry."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Whether or not public network access is allowed for the container registry."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -4342,7 +4539,11 @@ pub mod registry_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistryUsageListResult {
     #[doc = "The list of container registry quota usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegistryUsage>,
 }
 impl RegistryUsageListResult {
@@ -4371,7 +4572,11 @@ impl Replication {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationListResult {
     #[doc = "The list of replications. Since this list may be incomplete, the nextLink field should be used to request the next list of replications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Replication>,
     #[doc = "The URI that can be used to request the next list of replications."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4808,7 +5013,11 @@ impl RunGetLogResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Run>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4853,7 +5062,12 @@ pub struct RunProperties {
     #[serde(rename = "finishTime", default, with = "azure_core::date::rfc3339::option")]
     pub finish_time: Option<time::OffsetDateTime>,
     #[doc = "The list of all images that were generated from the run. This is applicable if the run generates base image dependencies."]
-    #[serde(rename = "outputImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_images: Vec<ImageDescriptor>,
     #[doc = "The task against which run was scheduled."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4876,7 +5090,12 @@ pub struct RunProperties {
     #[serde(rename = "sourceRegistryAuth", default, skip_serializing_if = "Option::is_none")]
     pub source_registry_auth: Option<String>,
     #[doc = "The list of custom registries that were logged in during this run."]
-    #[serde(rename = "customRegistries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customRegistries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_registries: Vec<String>,
     #[doc = "The error message received from backend systems after the run is scheduled."]
     #[serde(rename = "runErrorMessage", default, skip_serializing_if = "Option::is_none")]
@@ -5093,7 +5312,11 @@ impl ScopeMap {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScopeMapListResult {
     #[doc = "The list of scope maps. Since this list may be incomplete, the nextLink field should be used to request the next list of scope maps."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScopeMap>,
     #[doc = "The URI that can be used to request the next list of scope maps."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5194,7 +5417,11 @@ pub struct ScopeMapPropertiesUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of scope permissions for registry artifacts.\r\nE.g. repositories/repository-name/pull, \r\nrepositories/repository-name/delete"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
 }
 impl ScopeMapPropertiesUpdateParameters {
@@ -5628,7 +5855,12 @@ pub struct SourceTriggerUpdateParameters {
     #[serde(rename = "sourceRepository", default, skip_serializing_if = "Option::is_none")]
     pub source_repository: Option<SourceUpdateParameters>,
     #[doc = "The source event corresponding to the trigger."]
-    #[serde(rename = "sourceTriggerEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceTriggerEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_trigger_events: Vec<String>,
     #[doc = "The current status of trigger."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6034,7 +6266,11 @@ impl Task {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Task>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6281,7 +6517,11 @@ impl TaskRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskRunListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TaskRun>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6430,7 +6670,12 @@ pub struct TaskStepProperties {
     #[serde(rename = "type")]
     pub type_: task_step_properties::Type,
     #[doc = "List of base image dependencies for a step."]
-    #[serde(rename = "baseImageDependencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "baseImageDependencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub base_image_dependencies: Vec<BaseImageDependency>,
     #[doc = "The URL(absolute or relative) of the source context for the task step."]
     #[serde(rename = "contextPath", default, skip_serializing_if = "Option::is_none")]
@@ -6904,9 +7149,17 @@ pub mod token_certificate {
 #[doc = "The properties of the credentials that can be used for authenticating the token."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TokenCredentialsProperties {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<TokenCertificate>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<TokenPassword>,
 }
 impl TokenCredentialsProperties {
@@ -6918,7 +7171,11 @@ impl TokenCredentialsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TokenListResult {
     #[doc = "The list of tokens. Since this list may be incomplete, the nextLink field should be used to request the next list of tokens."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Token>,
     #[doc = "The URI that can be used to request the next list of tokens."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7185,10 +7442,20 @@ pub mod token_update_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TriggerProperties {
     #[doc = "The collection of timer triggers."]
-    #[serde(rename = "timerTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timerTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub timer_triggers: Vec<TimerTrigger>,
     #[doc = "The collection of triggers based on source code repository."]
-    #[serde(rename = "sourceTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_triggers: Vec<SourceTrigger>,
     #[doc = "The trigger based on base image dependency."]
     #[serde(rename = "baseImageTrigger", default, skip_serializing_if = "Option::is_none")]
@@ -7203,10 +7470,20 @@ impl TriggerProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TriggerUpdateParameters {
     #[doc = "The collection of timer triggers."]
-    #[serde(rename = "timerTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timerTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub timer_triggers: Vec<TimerTriggerUpdateParameters>,
     #[doc = "The collection of triggers based on source code repository."]
-    #[serde(rename = "sourceTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_triggers: Vec<SourceTriggerUpdateParameters>,
     #[doc = "The properties for updating base image dependency trigger."]
     #[serde(rename = "baseImageTrigger", default, skip_serializing_if = "Option::is_none")]
@@ -7432,7 +7709,11 @@ impl WebhookCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebhookListResult {
     #[doc = "The list of webhooks. Since this list may be incomplete, the nextLink field should be used to request the next list of webhooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Webhook>,
     #[doc = "The URI that can be used to request the next list of webhooks."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7648,7 +7929,11 @@ pub struct WebhookPropertiesUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scope: Option<String>,
     #[doc = "The list of actions that trigger the webhook to post notifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
 }
 impl WebhookPropertiesUpdateParameters {
diff --git a/services/mgmt/containerregistry/src/package_2021_08_preview/models.rs b/services/mgmt/containerregistry/src/package_2021_08_preview/models.rs
index 1e1318775b..409a1f6741 100644
--- a/services/mgmt/containerregistry/src/package_2021_08_preview/models.rs
+++ b/services/mgmt/containerregistry/src/package_2021_08_preview/models.rs
@@ -103,7 +103,11 @@ impl AgentPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentPoolListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AgentPool>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -829,7 +833,11 @@ impl ConnectedRegistry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectedRegistryListResult {
     #[doc = "The list of connected registries. Since this list may be incomplete, the nextLink field should be used to request the next list of connected registries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectedRegistry>,
     #[doc = "The URI that can be used to request the next list of connected registries."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -869,7 +877,12 @@ pub struct ConnectedRegistryProperties {
     #[doc = "The properties of the connected registry parent."]
     pub parent: ParentProperties,
     #[doc = "The list of the ACR token resource IDs used to authenticate clients to the connected registry."]
-    #[serde(rename = "clientTokenIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientTokenIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_token_ids: Vec<String>,
     #[doc = "The login server properties of the connected registry."]
     #[serde(rename = "loginServer", default, skip_serializing_if = "Option::is_none")]
@@ -878,10 +891,20 @@ pub struct ConnectedRegistryProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub logging: Option<LoggingProperties>,
     #[doc = "The list of current statuses of the connected registry."]
-    #[serde(rename = "statusDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_details: Vec<StatusDetailProperties>,
     #[doc = "The list of notifications subscription information for the connected registry."]
-    #[serde(rename = "notificationsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notifications_list: Vec<String>,
 }
 impl ConnectedRegistryProperties {
@@ -1054,10 +1077,20 @@ pub struct ConnectedRegistryUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub logging: Option<LoggingProperties>,
     #[doc = "The list of the ACR token resource IDs used to authenticate clients to the connected registry."]
-    #[serde(rename = "clientTokenIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientTokenIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_token_ids: Vec<String>,
     #[doc = "The list of notifications subscription information for the connected registry."]
-    #[serde(rename = "notificationsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notifications_list: Vec<String>,
 }
 impl ConnectedRegistryUpdateProperties {
@@ -1104,7 +1137,12 @@ pub struct DockerBuildRequest {
     #[serde(flatten)]
     pub run_request: RunRequest,
     #[doc = "The fully qualified image names including the repository and tag."]
-    #[serde(rename = "imageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_names: Vec<String>,
     #[doc = "The value of this property indicates whether the image built should be pushed to the registry or not."]
     #[serde(rename = "isPushEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -1119,7 +1157,11 @@ pub struct DockerBuildRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The collection of override arguments to be used when executing the run."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
     #[doc = "Run timeout in seconds."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1160,7 +1202,12 @@ pub struct DockerBuildStep {
     #[serde(flatten)]
     pub task_step_properties: TaskStepProperties,
     #[doc = "The fully qualified image names including the repository and tag."]
-    #[serde(rename = "imageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_names: Vec<String>,
     #[doc = "The value of this property indicates whether the image built should be pushed to the registry or not."]
     #[serde(rename = "isPushEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -1175,7 +1222,11 @@ pub struct DockerBuildStep {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The collection of override arguments to be used when executing this build step."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
 }
 impl DockerBuildStep {
@@ -1197,7 +1248,12 @@ pub struct DockerBuildStepUpdateParameters {
     #[serde(flatten)]
     pub task_step_update_parameters: TaskStepUpdateParameters,
     #[doc = "The fully qualified image names including the repository and tag."]
-    #[serde(rename = "imageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_names: Vec<String>,
     #[doc = "The value of this property indicates whether the image built should be pushed to the registry or not."]
     #[serde(rename = "isPushEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -1209,7 +1265,11 @@ pub struct DockerBuildStepUpdateParameters {
     #[serde(rename = "dockerFilePath", default, skip_serializing_if = "Option::is_none")]
     pub docker_file_path: Option<String>,
     #[doc = "The collection of override arguments to be used when executing this build step."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
     #[doc = "The name of the target build stage for the docker build."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1240,7 +1300,11 @@ pub struct EncodedTaskRunRequest {
     #[serde(rename = "encodedValuesContent", default, skip_serializing_if = "Option::is_none")]
     pub encoded_values_content: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
     #[doc = "Run timeout in seconds."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1284,7 +1348,11 @@ pub struct EncodedTaskStep {
     #[serde(rename = "encodedValuesContent", default, skip_serializing_if = "Option::is_none")]
     pub encoded_values_content: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl EncodedTaskStep {
@@ -1309,7 +1377,11 @@ pub struct EncodedTaskStepUpdateParameters {
     #[serde(rename = "encodedValuesContent", default, skip_serializing_if = "Option::is_none")]
     pub encoded_values_content: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl EncodedTaskStepUpdateParameters {
@@ -1406,7 +1478,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "an array of additional nested error response info objects, as described by this contract."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<InnerErrorDescription>,
 }
 impl ErrorResponseBody {
@@ -1482,7 +1558,11 @@ impl EventInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventListResult {
     #[doc = "The list of events. Since this list may be incomplete, the nextLink field should be used to request the next list of events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Event>,
     #[doc = "The URI that can be used to request the next list of events."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1571,7 +1651,11 @@ impl ExportPipeline {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExportPipelineListResult {
     #[doc = "The list of export pipelines. Since this list may be incomplete, the nextLink field should be used to request the next list of export pipelines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExportPipeline>,
     #[doc = "The URI that can be used to request the next list of pipeline runs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1594,7 +1678,11 @@ pub struct ExportPipelineProperties {
     #[doc = "The properties of the export pipeline target."]
     pub target: ExportPipelineTargetProperties,
     #[doc = "The list of all options configured for the pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub options: Vec<String>,
     #[doc = "The provisioning state of the pipeline at the time the operation was called."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1750,7 +1838,11 @@ pub struct FileTaskRunRequest {
     #[serde(rename = "valuesFilePath", default, skip_serializing_if = "Option::is_none")]
     pub values_file_path: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
     #[doc = "Run timeout in seconds."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1794,7 +1886,11 @@ pub struct FileTaskStep {
     #[serde(rename = "valuesFilePath", default, skip_serializing_if = "Option::is_none")]
     pub values_file_path: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl FileTaskStep {
@@ -1819,7 +1915,11 @@ pub struct FileTaskStepUpdateParameters {
     #[serde(rename = "valuesFilePath", default, skip_serializing_if = "Option::is_none")]
     pub values_file_path: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl FileTaskStepUpdateParameters {
@@ -1899,7 +1999,11 @@ pub struct GenerateCredentialsResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub username: Option<String>,
     #[doc = "The list of passwords for a container registry."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<TokenPassword>,
 }
 impl GenerateCredentialsResult {
@@ -2028,7 +2132,11 @@ pub struct ImageUpdateTrigger {
     #[serde(default, with = "azure_core::date::rfc3339::option")]
     pub timestamp: Option<time::OffsetDateTime>,
     #[doc = "The list of image updates that caused the build."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub images: Vec<ImageDescriptor>,
 }
 impl ImageUpdateTrigger {
@@ -2040,10 +2148,20 @@ impl ImageUpdateTrigger {
 pub struct ImportImageParameters {
     pub source: ImportSource,
     #[doc = "List of strings of the form repo[:tag]. When tag is omitted the source will be used (or 'latest' if source tag is also omitted)."]
-    #[serde(rename = "targetTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_tags: Vec<String>,
     #[doc = "List of strings of repository names to do a manifest only copy. No tag will be created."]
-    #[serde(rename = "untaggedTargetRepositories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "untaggedTargetRepositories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub untagged_target_repositories: Vec<String>,
     #[doc = "When Force, any existing target tags will be overwritten. When NoForce, any existing target tags will fail the operation before any copying begins."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2128,7 +2246,11 @@ impl ImportPipeline {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImportPipelineListResult {
     #[doc = "The list of import pipelines. Since this list may be incomplete, the nextLink field should be used to request the next list of import pipelines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImportPipeline>,
     #[doc = "The URI that can be used to request the next list of pipeline runs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2153,7 +2275,11 @@ pub struct ImportPipelineProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub trigger: Option<PipelineTriggerProperties>,
     #[doc = "The list of all options configured for the pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub options: Vec<String>,
     #[doc = "The provisioning state of the pipeline at the time the operation was called."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2492,10 +2618,20 @@ pub struct NetworkRuleSet {
     #[serde(rename = "defaultAction")]
     pub default_action: network_rule_set::DefaultAction,
     #[doc = "The virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "The IP ACL rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
 }
 impl NetworkRuleSet {
@@ -2601,7 +2737,11 @@ impl OperationDisplayDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of container registry operations. Since this list may be incomplete, the nextLink field should be used to request the next list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDefinition>,
     #[doc = "The URI that can be used to request the next list of container registry operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2679,10 +2819,20 @@ impl OperationPropertiesDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationServiceSpecificationDefinition {
     #[doc = "A list of Azure Monitoring metrics definition."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetricSpecificationDefinition>,
     #[doc = "A list of Azure Monitoring log definitions."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationLogSpecificationDefinition>,
 }
 impl OperationServiceSpecificationDefinition {
@@ -2699,13 +2849,21 @@ pub struct OverrideTaskStepProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub file: Option<String>,
     #[doc = "Gets or sets the collection of override arguments to be used when\r\nexecuting a build step."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
     #[doc = "The name of the target build stage for the docker build."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a Task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
     #[doc = "Base64 encoded update trigger token that will be attached with the base image trigger webhook."]
     #[serde(rename = "updateTriggerToken", default, skip_serializing_if = "Option::is_none")]
@@ -2749,7 +2907,11 @@ impl PipelineRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PipelineRunListResult {
     #[doc = "The list of pipeline runs. Since this list may be incomplete, the nextLink field should be used to request the next list of pipeline runs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PipelineRun>,
     #[doc = "The URI that can be used to request the next list of pipeline runs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2842,7 +3004,11 @@ pub struct PipelineRunRequest {
     #[serde(rename = "pipelineResourceId", default, skip_serializing_if = "Option::is_none")]
     pub pipeline_resource_id: Option<String>,
     #[doc = "List of source artifacts to be transferred by the pipeline. \r\nSpecify an image by repository ('hello-world'). This will use the 'latest' tag.\r\nSpecify an image by tag ('hello-world:latest').\r\nSpecify an image by sha256-based manifest digest ('hello-world@sha256:abc123')."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub source: Option<PipelineRunSourceProperties>,
@@ -2864,7 +3030,12 @@ pub struct PipelineRunResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "The artifacts imported in the pipeline run."]
-    #[serde(rename = "importedArtifacts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "importedArtifacts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub imported_artifacts: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub progress: Option<ProgressProperties>,
@@ -3444,7 +3615,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The list of private endpoint connections. Since this list may be incomplete, the nextLink field should be used to request the next list of private endpoint connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URI that can be used to request the next list of private endpoint connections."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3552,7 +3727,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "The list of private link resources. Since this list may be incomplete, the nextLink field should be used to request the next list of private link resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URI that can be used to request the next list of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3576,10 +3755,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -3830,7 +4019,11 @@ pub struct RegistryListCredentialsResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub username: Option<String>,
     #[doc = "The list of passwords for a container registry."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<RegistryPassword>,
 }
 impl RegistryListCredentialsResult {
@@ -3842,7 +4035,11 @@ impl RegistryListCredentialsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistryListResult {
     #[doc = "The list of container registries. Since this list may be incomplete, the nextLink field should be used to request the next list of container registries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Registry>,
     #[doc = "The URI that can be used to request the next list of container registries."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3956,10 +4153,20 @@ pub struct RegistryProperties {
     #[serde(rename = "dataEndpointEnabled", default, skip_serializing_if = "Option::is_none")]
     pub data_endpoint_enabled: Option<bool>,
     #[doc = "List of host names that will serve data when dataEndpointEnabled is true."]
-    #[serde(rename = "dataEndpointHostNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataEndpointHostNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_endpoint_host_names: Vec<String>,
     #[doc = "List of private endpoint connections for a container registry."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Whether or not public network access is allowed for the container registry."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -4353,7 +4560,11 @@ pub mod registry_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistryUsageListResult {
     #[doc = "The list of container registry quota usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegistryUsage>,
 }
 impl RegistryUsageListResult {
@@ -4382,7 +4593,11 @@ impl Replication {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationListResult {
     #[doc = "The list of replications. Since this list may be incomplete, the nextLink field should be used to request the next list of replications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Replication>,
     #[doc = "The URI that can be used to request the next list of replications."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4819,7 +5034,11 @@ impl RunGetLogResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Run>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4864,7 +5083,12 @@ pub struct RunProperties {
     #[serde(rename = "finishTime", default, with = "azure_core::date::rfc3339::option")]
     pub finish_time: Option<time::OffsetDateTime>,
     #[doc = "The list of all images that were generated from the run. This is applicable if the run generates base image dependencies."]
-    #[serde(rename = "outputImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_images: Vec<ImageDescriptor>,
     #[doc = "The task against which run was scheduled."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4887,7 +5111,12 @@ pub struct RunProperties {
     #[serde(rename = "sourceRegistryAuth", default, skip_serializing_if = "Option::is_none")]
     pub source_registry_auth: Option<String>,
     #[doc = "The list of custom registries that were logged in during this run."]
-    #[serde(rename = "customRegistries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customRegistries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_registries: Vec<String>,
     #[doc = "The error message received from backend systems after the run is scheduled."]
     #[serde(rename = "runErrorMessage", default, skip_serializing_if = "Option::is_none")]
@@ -5104,7 +5333,11 @@ impl ScopeMap {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScopeMapListResult {
     #[doc = "The list of scope maps. Since this list may be incomplete, the nextLink field should be used to request the next list of scope maps."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScopeMap>,
     #[doc = "The URI that can be used to request the next list of scope maps."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5205,7 +5438,11 @@ pub struct ScopeMapPropertiesUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of scope permissions for registry artifacts.\r\nE.g. repositories/repository-name/pull, \r\nrepositories/repository-name/delete"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
 }
 impl ScopeMapPropertiesUpdateParameters {
@@ -5639,7 +5876,12 @@ pub struct SourceTriggerUpdateParameters {
     #[serde(rename = "sourceRepository", default, skip_serializing_if = "Option::is_none")]
     pub source_repository: Option<SourceUpdateParameters>,
     #[doc = "The source event corresponding to the trigger."]
-    #[serde(rename = "sourceTriggerEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceTriggerEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_trigger_events: Vec<String>,
     #[doc = "The current status of trigger."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6045,7 +6287,11 @@ impl Task {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Task>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6292,7 +6538,11 @@ impl TaskRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskRunListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TaskRun>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6441,7 +6691,12 @@ pub struct TaskStepProperties {
     #[serde(rename = "type")]
     pub type_: task_step_properties::Type,
     #[doc = "List of base image dependencies for a step."]
-    #[serde(rename = "baseImageDependencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "baseImageDependencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub base_image_dependencies: Vec<BaseImageDependency>,
     #[doc = "The URL(absolute or relative) of the source context for the task step."]
     #[serde(rename = "contextPath", default, skip_serializing_if = "Option::is_none")]
@@ -6915,9 +7170,17 @@ pub mod token_certificate {
 #[doc = "The properties of the credentials that can be used for authenticating the token."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TokenCredentialsProperties {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<TokenCertificate>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<TokenPassword>,
 }
 impl TokenCredentialsProperties {
@@ -6929,7 +7192,11 @@ impl TokenCredentialsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TokenListResult {
     #[doc = "The list of tokens. Since this list may be incomplete, the nextLink field should be used to request the next list of tokens."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Token>,
     #[doc = "The URI that can be used to request the next list of tokens."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7196,10 +7463,20 @@ pub mod token_update_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TriggerProperties {
     #[doc = "The collection of timer triggers."]
-    #[serde(rename = "timerTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timerTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub timer_triggers: Vec<TimerTrigger>,
     #[doc = "The collection of triggers based on source code repository."]
-    #[serde(rename = "sourceTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_triggers: Vec<SourceTrigger>,
     #[doc = "The trigger based on base image dependency."]
     #[serde(rename = "baseImageTrigger", default, skip_serializing_if = "Option::is_none")]
@@ -7214,10 +7491,20 @@ impl TriggerProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TriggerUpdateParameters {
     #[doc = "The collection of timer triggers."]
-    #[serde(rename = "timerTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timerTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub timer_triggers: Vec<TimerTriggerUpdateParameters>,
     #[doc = "The collection of triggers based on source code repository."]
-    #[serde(rename = "sourceTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_triggers: Vec<SourceTriggerUpdateParameters>,
     #[doc = "The properties for updating base image dependency trigger."]
     #[serde(rename = "baseImageTrigger", default, skip_serializing_if = "Option::is_none")]
@@ -7443,7 +7730,11 @@ impl WebhookCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebhookListResult {
     #[doc = "The list of webhooks. Since this list may be incomplete, the nextLink field should be used to request the next list of webhooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Webhook>,
     #[doc = "The URI that can be used to request the next list of webhooks."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7659,7 +7950,11 @@ pub struct WebhookPropertiesUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scope: Option<String>,
     #[doc = "The list of actions that trigger the webhook to post notifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
 }
 impl WebhookPropertiesUpdateParameters {
diff --git a/services/mgmt/containerregistry/src/package_2021_09/models.rs b/services/mgmt/containerregistry/src/package_2021_09/models.rs
index 75682d357b..442b774e54 100644
--- a/services/mgmt/containerregistry/src/package_2021_09/models.rs
+++ b/services/mgmt/containerregistry/src/package_2021_09/models.rs
@@ -36,7 +36,11 @@ impl AgentPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentPoolListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AgentPool>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -783,7 +787,12 @@ pub struct DockerBuildRequest {
     #[serde(flatten)]
     pub run_request: RunRequest,
     #[doc = "The fully qualified image names including the repository and tag."]
-    #[serde(rename = "imageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_names: Vec<String>,
     #[doc = "The value of this property indicates whether the image built should be pushed to the registry or not."]
     #[serde(rename = "isPushEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -798,7 +807,11 @@ pub struct DockerBuildRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The collection of override arguments to be used when executing the run."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
     #[doc = "Run timeout in seconds."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -839,7 +852,12 @@ pub struct DockerBuildStep {
     #[serde(flatten)]
     pub task_step_properties: TaskStepProperties,
     #[doc = "The fully qualified image names including the repository and tag."]
-    #[serde(rename = "imageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_names: Vec<String>,
     #[doc = "The value of this property indicates whether the image built should be pushed to the registry or not."]
     #[serde(rename = "isPushEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -854,7 +872,11 @@ pub struct DockerBuildStep {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The collection of override arguments to be used when executing this build step."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
 }
 impl DockerBuildStep {
@@ -876,7 +898,12 @@ pub struct DockerBuildStepUpdateParameters {
     #[serde(flatten)]
     pub task_step_update_parameters: TaskStepUpdateParameters,
     #[doc = "The fully qualified image names including the repository and tag."]
-    #[serde(rename = "imageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_names: Vec<String>,
     #[doc = "The value of this property indicates whether the image built should be pushed to the registry or not."]
     #[serde(rename = "isPushEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -888,7 +915,11 @@ pub struct DockerBuildStepUpdateParameters {
     #[serde(rename = "dockerFilePath", default, skip_serializing_if = "Option::is_none")]
     pub docker_file_path: Option<String>,
     #[doc = "The collection of override arguments to be used when executing this build step."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
     #[doc = "The name of the target build stage for the docker build."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -919,7 +950,11 @@ pub struct EncodedTaskRunRequest {
     #[serde(rename = "encodedValuesContent", default, skip_serializing_if = "Option::is_none")]
     pub encoded_values_content: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
     #[doc = "Run timeout in seconds."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -963,7 +998,11 @@ pub struct EncodedTaskStep {
     #[serde(rename = "encodedValuesContent", default, skip_serializing_if = "Option::is_none")]
     pub encoded_values_content: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl EncodedTaskStep {
@@ -988,7 +1027,11 @@ pub struct EncodedTaskStepUpdateParameters {
     #[serde(rename = "encodedValuesContent", default, skip_serializing_if = "Option::is_none")]
     pub encoded_values_content: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl EncodedTaskStepUpdateParameters {
@@ -1085,7 +1128,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "an array of additional nested error response info objects, as described by this contract."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<InnerErrorDescription>,
 }
 impl ErrorResponseBody {
@@ -1161,7 +1208,11 @@ impl EventInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventListResult {
     #[doc = "The list of events. Since this list may be incomplete, the nextLink field should be used to request the next list of events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Event>,
     #[doc = "The URI that can be used to request the next list of events."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1297,7 +1348,11 @@ pub struct FileTaskRunRequest {
     #[serde(rename = "valuesFilePath", default, skip_serializing_if = "Option::is_none")]
     pub values_file_path: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
     #[doc = "Run timeout in seconds."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1341,7 +1396,11 @@ pub struct FileTaskStep {
     #[serde(rename = "valuesFilePath", default, skip_serializing_if = "Option::is_none")]
     pub values_file_path: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl FileTaskStep {
@@ -1366,7 +1425,11 @@ pub struct FileTaskStepUpdateParameters {
     #[serde(rename = "valuesFilePath", default, skip_serializing_if = "Option::is_none")]
     pub values_file_path: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl FileTaskStepUpdateParameters {
@@ -1500,7 +1563,11 @@ pub struct ImageUpdateTrigger {
     #[serde(default, with = "azure_core::date::rfc3339::option")]
     pub timestamp: Option<time::OffsetDateTime>,
     #[doc = "The list of image updates that caused the build."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub images: Vec<ImageDescriptor>,
 }
 impl ImageUpdateTrigger {
@@ -1512,10 +1579,20 @@ impl ImageUpdateTrigger {
 pub struct ImportImageParameters {
     pub source: ImportSource,
     #[doc = "List of strings of the form repo[:tag]. When tag is omitted the source will be used (or 'latest' if source tag is also omitted)."]
-    #[serde(rename = "targetTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_tags: Vec<String>,
     #[doc = "List of strings of repository names to do a manifest only copy. No tag will be created."]
-    #[serde(rename = "untaggedTargetRepositories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "untaggedTargetRepositories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub untagged_target_repositories: Vec<String>,
     #[doc = "When Force, any existing target tags will be overwritten. When NoForce, any existing target tags will fail the operation before any copying begins."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1663,7 +1740,12 @@ pub struct NetworkRuleSet {
     #[serde(rename = "defaultAction")]
     pub default_action: network_rule_set::DefaultAction,
     #[doc = "The IP ACL rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
 }
 impl NetworkRuleSet {
@@ -1768,7 +1850,11 @@ impl OperationDisplayDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of container registry operations. Since this list may be incomplete, the nextLink field should be used to request the next list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDefinition>,
     #[doc = "The URI that can be used to request the next list of container registry operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1846,10 +1932,20 @@ impl OperationPropertiesDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationServiceSpecificationDefinition {
     #[doc = "A list of Azure Monitoring metrics definition."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetricSpecificationDefinition>,
     #[doc = "A list of Azure Monitoring log definitions."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationLogSpecificationDefinition>,
 }
 impl OperationServiceSpecificationDefinition {
@@ -1866,13 +1962,21 @@ pub struct OverrideTaskStepProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub file: Option<String>,
     #[doc = "Gets or sets the collection of override arguments to be used when\r\nexecuting a build step."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
     #[doc = "The name of the target build stage for the docker build."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a Task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
     #[doc = "Base64 encoded update trigger token that will be attached with the base image trigger webhook."]
     #[serde(rename = "updateTriggerToken", default, skip_serializing_if = "Option::is_none")]
@@ -2248,7 +2352,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The list of private endpoint connections. Since this list may be incomplete, the nextLink field should be used to request the next list of private endpoint connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URI that can be used to request the next list of private endpoint connections."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2356,7 +2464,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "The list of private link resources. Since this list may be incomplete, the nextLink field should be used to request the next list of private link resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URI that can be used to request the next list of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2380,10 +2492,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -2623,7 +2745,11 @@ pub struct RegistryListCredentialsResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub username: Option<String>,
     #[doc = "The list of passwords for a container registry."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<RegistryPassword>,
 }
 impl RegistryListCredentialsResult {
@@ -2635,7 +2761,11 @@ impl RegistryListCredentialsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistryListResult {
     #[doc = "The list of container registries. Since this list may be incomplete, the nextLink field should be used to request the next list of container registries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Registry>,
     #[doc = "The URI that can be used to request the next list of container registries."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2749,10 +2879,20 @@ pub struct RegistryProperties {
     #[serde(rename = "dataEndpointEnabled", default, skip_serializing_if = "Option::is_none")]
     pub data_endpoint_enabled: Option<bool>,
     #[doc = "List of host names that will serve data when dataEndpointEnabled is true."]
-    #[serde(rename = "dataEndpointHostNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataEndpointHostNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_endpoint_host_names: Vec<String>,
     #[doc = "List of private endpoint connections for a container registry."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Whether or not public network access is allowed for the container registry."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -3140,7 +3280,11 @@ pub mod registry_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistryUsageListResult {
     #[doc = "The list of container registry quota usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegistryUsage>,
 }
 impl RegistryUsageListResult {
@@ -3169,7 +3313,11 @@ impl Replication {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationListResult {
     #[doc = "The list of replications. Since this list may be incomplete, the nextLink field should be used to request the next list of replications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Replication>,
     #[doc = "The URI that can be used to request the next list of replications."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3606,7 +3754,11 @@ impl RunGetLogResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Run>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3651,7 +3803,12 @@ pub struct RunProperties {
     #[serde(rename = "finishTime", default, with = "azure_core::date::rfc3339::option")]
     pub finish_time: Option<time::OffsetDateTime>,
     #[doc = "The list of all images that were generated from the run. This is applicable if the run generates base image dependencies."]
-    #[serde(rename = "outputImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_images: Vec<ImageDescriptor>,
     #[doc = "The task against which run was scheduled."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3674,7 +3831,12 @@ pub struct RunProperties {
     #[serde(rename = "sourceRegistryAuth", default, skip_serializing_if = "Option::is_none")]
     pub source_registry_auth: Option<String>,
     #[doc = "The list of custom registries that were logged in during this run."]
-    #[serde(rename = "customRegistries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customRegistries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_registries: Vec<String>,
     #[doc = "The error message received from backend systems after the run is scheduled."]
     #[serde(rename = "runErrorMessage", default, skip_serializing_if = "Option::is_none")]
@@ -4287,7 +4449,12 @@ pub struct SourceTriggerUpdateParameters {
     #[serde(rename = "sourceRepository", default, skip_serializing_if = "Option::is_none")]
     pub source_repository: Option<SourceUpdateParameters>,
     #[doc = "The source event corresponding to the trigger."]
-    #[serde(rename = "sourceTriggerEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceTriggerEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_trigger_events: Vec<String>,
     #[doc = "The current status of trigger."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4628,7 +4795,11 @@ impl Task {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Task>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4875,7 +5046,11 @@ impl TaskRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskRunListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TaskRun>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5024,7 +5199,12 @@ pub struct TaskStepProperties {
     #[serde(rename = "type")]
     pub type_: task_step_properties::Type,
     #[doc = "List of base image dependencies for a step."]
-    #[serde(rename = "baseImageDependencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "baseImageDependencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub base_image_dependencies: Vec<BaseImageDependency>,
     #[doc = "The URL(absolute or relative) of the source context for the task step."]
     #[serde(rename = "contextPath", default, skip_serializing_if = "Option::is_none")]
@@ -5316,10 +5496,20 @@ pub mod timer_trigger_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TriggerProperties {
     #[doc = "The collection of timer triggers."]
-    #[serde(rename = "timerTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timerTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub timer_triggers: Vec<TimerTrigger>,
     #[doc = "The collection of triggers based on source code repository."]
-    #[serde(rename = "sourceTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_triggers: Vec<SourceTrigger>,
     #[doc = "The trigger based on base image dependency."]
     #[serde(rename = "baseImageTrigger", default, skip_serializing_if = "Option::is_none")]
@@ -5334,10 +5524,20 @@ impl TriggerProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TriggerUpdateParameters {
     #[doc = "The collection of timer triggers."]
-    #[serde(rename = "timerTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timerTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub timer_triggers: Vec<TimerTriggerUpdateParameters>,
     #[doc = "The collection of triggers based on source code repository."]
-    #[serde(rename = "sourceTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_triggers: Vec<SourceTriggerUpdateParameters>,
     #[doc = "The properties for updating base image dependency trigger."]
     #[serde(rename = "baseImageTrigger", default, skip_serializing_if = "Option::is_none")]
@@ -5506,7 +5706,11 @@ impl WebhookCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebhookListResult {
     #[doc = "The list of webhooks. Since this list may be incomplete, the nextLink field should be used to request the next list of webhooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Webhook>,
     #[doc = "The URI that can be used to request the next list of webhooks."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5722,7 +5926,11 @@ pub struct WebhookPropertiesUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scope: Option<String>,
     #[doc = "The list of actions that trigger the webhook to post notifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
 }
 impl WebhookPropertiesUpdateParameters {
diff --git a/services/mgmt/containerregistry/src/package_2021_12_preview/models.rs b/services/mgmt/containerregistry/src/package_2021_12_preview/models.rs
index 1e1318775b..409a1f6741 100644
--- a/services/mgmt/containerregistry/src/package_2021_12_preview/models.rs
+++ b/services/mgmt/containerregistry/src/package_2021_12_preview/models.rs
@@ -103,7 +103,11 @@ impl AgentPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentPoolListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AgentPool>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -829,7 +833,11 @@ impl ConnectedRegistry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectedRegistryListResult {
     #[doc = "The list of connected registries. Since this list may be incomplete, the nextLink field should be used to request the next list of connected registries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectedRegistry>,
     #[doc = "The URI that can be used to request the next list of connected registries."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -869,7 +877,12 @@ pub struct ConnectedRegistryProperties {
     #[doc = "The properties of the connected registry parent."]
     pub parent: ParentProperties,
     #[doc = "The list of the ACR token resource IDs used to authenticate clients to the connected registry."]
-    #[serde(rename = "clientTokenIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientTokenIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_token_ids: Vec<String>,
     #[doc = "The login server properties of the connected registry."]
     #[serde(rename = "loginServer", default, skip_serializing_if = "Option::is_none")]
@@ -878,10 +891,20 @@ pub struct ConnectedRegistryProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub logging: Option<LoggingProperties>,
     #[doc = "The list of current statuses of the connected registry."]
-    #[serde(rename = "statusDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_details: Vec<StatusDetailProperties>,
     #[doc = "The list of notifications subscription information for the connected registry."]
-    #[serde(rename = "notificationsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notifications_list: Vec<String>,
 }
 impl ConnectedRegistryProperties {
@@ -1054,10 +1077,20 @@ pub struct ConnectedRegistryUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub logging: Option<LoggingProperties>,
     #[doc = "The list of the ACR token resource IDs used to authenticate clients to the connected registry."]
-    #[serde(rename = "clientTokenIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientTokenIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_token_ids: Vec<String>,
     #[doc = "The list of notifications subscription information for the connected registry."]
-    #[serde(rename = "notificationsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notifications_list: Vec<String>,
 }
 impl ConnectedRegistryUpdateProperties {
@@ -1104,7 +1137,12 @@ pub struct DockerBuildRequest {
     #[serde(flatten)]
     pub run_request: RunRequest,
     #[doc = "The fully qualified image names including the repository and tag."]
-    #[serde(rename = "imageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_names: Vec<String>,
     #[doc = "The value of this property indicates whether the image built should be pushed to the registry or not."]
     #[serde(rename = "isPushEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -1119,7 +1157,11 @@ pub struct DockerBuildRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The collection of override arguments to be used when executing the run."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
     #[doc = "Run timeout in seconds."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1160,7 +1202,12 @@ pub struct DockerBuildStep {
     #[serde(flatten)]
     pub task_step_properties: TaskStepProperties,
     #[doc = "The fully qualified image names including the repository and tag."]
-    #[serde(rename = "imageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_names: Vec<String>,
     #[doc = "The value of this property indicates whether the image built should be pushed to the registry or not."]
     #[serde(rename = "isPushEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -1175,7 +1222,11 @@ pub struct DockerBuildStep {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The collection of override arguments to be used when executing this build step."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
 }
 impl DockerBuildStep {
@@ -1197,7 +1248,12 @@ pub struct DockerBuildStepUpdateParameters {
     #[serde(flatten)]
     pub task_step_update_parameters: TaskStepUpdateParameters,
     #[doc = "The fully qualified image names including the repository and tag."]
-    #[serde(rename = "imageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_names: Vec<String>,
     #[doc = "The value of this property indicates whether the image built should be pushed to the registry or not."]
     #[serde(rename = "isPushEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -1209,7 +1265,11 @@ pub struct DockerBuildStepUpdateParameters {
     #[serde(rename = "dockerFilePath", default, skip_serializing_if = "Option::is_none")]
     pub docker_file_path: Option<String>,
     #[doc = "The collection of override arguments to be used when executing this build step."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
     #[doc = "The name of the target build stage for the docker build."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1240,7 +1300,11 @@ pub struct EncodedTaskRunRequest {
     #[serde(rename = "encodedValuesContent", default, skip_serializing_if = "Option::is_none")]
     pub encoded_values_content: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
     #[doc = "Run timeout in seconds."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1284,7 +1348,11 @@ pub struct EncodedTaskStep {
     #[serde(rename = "encodedValuesContent", default, skip_serializing_if = "Option::is_none")]
     pub encoded_values_content: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl EncodedTaskStep {
@@ -1309,7 +1377,11 @@ pub struct EncodedTaskStepUpdateParameters {
     #[serde(rename = "encodedValuesContent", default, skip_serializing_if = "Option::is_none")]
     pub encoded_values_content: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl EncodedTaskStepUpdateParameters {
@@ -1406,7 +1478,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "an array of additional nested error response info objects, as described by this contract."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<InnerErrorDescription>,
 }
 impl ErrorResponseBody {
@@ -1482,7 +1558,11 @@ impl EventInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventListResult {
     #[doc = "The list of events. Since this list may be incomplete, the nextLink field should be used to request the next list of events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Event>,
     #[doc = "The URI that can be used to request the next list of events."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1571,7 +1651,11 @@ impl ExportPipeline {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExportPipelineListResult {
     #[doc = "The list of export pipelines. Since this list may be incomplete, the nextLink field should be used to request the next list of export pipelines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExportPipeline>,
     #[doc = "The URI that can be used to request the next list of pipeline runs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1594,7 +1678,11 @@ pub struct ExportPipelineProperties {
     #[doc = "The properties of the export pipeline target."]
     pub target: ExportPipelineTargetProperties,
     #[doc = "The list of all options configured for the pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub options: Vec<String>,
     #[doc = "The provisioning state of the pipeline at the time the operation was called."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1750,7 +1838,11 @@ pub struct FileTaskRunRequest {
     #[serde(rename = "valuesFilePath", default, skip_serializing_if = "Option::is_none")]
     pub values_file_path: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
     #[doc = "Run timeout in seconds."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1794,7 +1886,11 @@ pub struct FileTaskStep {
     #[serde(rename = "valuesFilePath", default, skip_serializing_if = "Option::is_none")]
     pub values_file_path: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl FileTaskStep {
@@ -1819,7 +1915,11 @@ pub struct FileTaskStepUpdateParameters {
     #[serde(rename = "valuesFilePath", default, skip_serializing_if = "Option::is_none")]
     pub values_file_path: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl FileTaskStepUpdateParameters {
@@ -1899,7 +1999,11 @@ pub struct GenerateCredentialsResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub username: Option<String>,
     #[doc = "The list of passwords for a container registry."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<TokenPassword>,
 }
 impl GenerateCredentialsResult {
@@ -2028,7 +2132,11 @@ pub struct ImageUpdateTrigger {
     #[serde(default, with = "azure_core::date::rfc3339::option")]
     pub timestamp: Option<time::OffsetDateTime>,
     #[doc = "The list of image updates that caused the build."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub images: Vec<ImageDescriptor>,
 }
 impl ImageUpdateTrigger {
@@ -2040,10 +2148,20 @@ impl ImageUpdateTrigger {
 pub struct ImportImageParameters {
     pub source: ImportSource,
     #[doc = "List of strings of the form repo[:tag]. When tag is omitted the source will be used (or 'latest' if source tag is also omitted)."]
-    #[serde(rename = "targetTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_tags: Vec<String>,
     #[doc = "List of strings of repository names to do a manifest only copy. No tag will be created."]
-    #[serde(rename = "untaggedTargetRepositories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "untaggedTargetRepositories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub untagged_target_repositories: Vec<String>,
     #[doc = "When Force, any existing target tags will be overwritten. When NoForce, any existing target tags will fail the operation before any copying begins."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2128,7 +2246,11 @@ impl ImportPipeline {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImportPipelineListResult {
     #[doc = "The list of import pipelines. Since this list may be incomplete, the nextLink field should be used to request the next list of import pipelines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImportPipeline>,
     #[doc = "The URI that can be used to request the next list of pipeline runs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2153,7 +2275,11 @@ pub struct ImportPipelineProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub trigger: Option<PipelineTriggerProperties>,
     #[doc = "The list of all options configured for the pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub options: Vec<String>,
     #[doc = "The provisioning state of the pipeline at the time the operation was called."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2492,10 +2618,20 @@ pub struct NetworkRuleSet {
     #[serde(rename = "defaultAction")]
     pub default_action: network_rule_set::DefaultAction,
     #[doc = "The virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "The IP ACL rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
 }
 impl NetworkRuleSet {
@@ -2601,7 +2737,11 @@ impl OperationDisplayDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of container registry operations. Since this list may be incomplete, the nextLink field should be used to request the next list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDefinition>,
     #[doc = "The URI that can be used to request the next list of container registry operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2679,10 +2819,20 @@ impl OperationPropertiesDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationServiceSpecificationDefinition {
     #[doc = "A list of Azure Monitoring metrics definition."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetricSpecificationDefinition>,
     #[doc = "A list of Azure Monitoring log definitions."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationLogSpecificationDefinition>,
 }
 impl OperationServiceSpecificationDefinition {
@@ -2699,13 +2849,21 @@ pub struct OverrideTaskStepProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub file: Option<String>,
     #[doc = "Gets or sets the collection of override arguments to be used when\r\nexecuting a build step."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
     #[doc = "The name of the target build stage for the docker build."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a Task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
     #[doc = "Base64 encoded update trigger token that will be attached with the base image trigger webhook."]
     #[serde(rename = "updateTriggerToken", default, skip_serializing_if = "Option::is_none")]
@@ -2749,7 +2907,11 @@ impl PipelineRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PipelineRunListResult {
     #[doc = "The list of pipeline runs. Since this list may be incomplete, the nextLink field should be used to request the next list of pipeline runs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PipelineRun>,
     #[doc = "The URI that can be used to request the next list of pipeline runs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2842,7 +3004,11 @@ pub struct PipelineRunRequest {
     #[serde(rename = "pipelineResourceId", default, skip_serializing_if = "Option::is_none")]
     pub pipeline_resource_id: Option<String>,
     #[doc = "List of source artifacts to be transferred by the pipeline. \r\nSpecify an image by repository ('hello-world'). This will use the 'latest' tag.\r\nSpecify an image by tag ('hello-world:latest').\r\nSpecify an image by sha256-based manifest digest ('hello-world@sha256:abc123')."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub source: Option<PipelineRunSourceProperties>,
@@ -2864,7 +3030,12 @@ pub struct PipelineRunResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "The artifacts imported in the pipeline run."]
-    #[serde(rename = "importedArtifacts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "importedArtifacts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub imported_artifacts: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub progress: Option<ProgressProperties>,
@@ -3444,7 +3615,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The list of private endpoint connections. Since this list may be incomplete, the nextLink field should be used to request the next list of private endpoint connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URI that can be used to request the next list of private endpoint connections."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3552,7 +3727,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "The list of private link resources. Since this list may be incomplete, the nextLink field should be used to request the next list of private link resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URI that can be used to request the next list of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3576,10 +3755,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -3830,7 +4019,11 @@ pub struct RegistryListCredentialsResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub username: Option<String>,
     #[doc = "The list of passwords for a container registry."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<RegistryPassword>,
 }
 impl RegistryListCredentialsResult {
@@ -3842,7 +4035,11 @@ impl RegistryListCredentialsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistryListResult {
     #[doc = "The list of container registries. Since this list may be incomplete, the nextLink field should be used to request the next list of container registries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Registry>,
     #[doc = "The URI that can be used to request the next list of container registries."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3956,10 +4153,20 @@ pub struct RegistryProperties {
     #[serde(rename = "dataEndpointEnabled", default, skip_serializing_if = "Option::is_none")]
     pub data_endpoint_enabled: Option<bool>,
     #[doc = "List of host names that will serve data when dataEndpointEnabled is true."]
-    #[serde(rename = "dataEndpointHostNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataEndpointHostNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_endpoint_host_names: Vec<String>,
     #[doc = "List of private endpoint connections for a container registry."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Whether or not public network access is allowed for the container registry."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -4353,7 +4560,11 @@ pub mod registry_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistryUsageListResult {
     #[doc = "The list of container registry quota usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegistryUsage>,
 }
 impl RegistryUsageListResult {
@@ -4382,7 +4593,11 @@ impl Replication {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationListResult {
     #[doc = "The list of replications. Since this list may be incomplete, the nextLink field should be used to request the next list of replications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Replication>,
     #[doc = "The URI that can be used to request the next list of replications."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4819,7 +5034,11 @@ impl RunGetLogResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Run>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4864,7 +5083,12 @@ pub struct RunProperties {
     #[serde(rename = "finishTime", default, with = "azure_core::date::rfc3339::option")]
     pub finish_time: Option<time::OffsetDateTime>,
     #[doc = "The list of all images that were generated from the run. This is applicable if the run generates base image dependencies."]
-    #[serde(rename = "outputImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_images: Vec<ImageDescriptor>,
     #[doc = "The task against which run was scheduled."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4887,7 +5111,12 @@ pub struct RunProperties {
     #[serde(rename = "sourceRegistryAuth", default, skip_serializing_if = "Option::is_none")]
     pub source_registry_auth: Option<String>,
     #[doc = "The list of custom registries that were logged in during this run."]
-    #[serde(rename = "customRegistries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customRegistries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_registries: Vec<String>,
     #[doc = "The error message received from backend systems after the run is scheduled."]
     #[serde(rename = "runErrorMessage", default, skip_serializing_if = "Option::is_none")]
@@ -5104,7 +5333,11 @@ impl ScopeMap {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScopeMapListResult {
     #[doc = "The list of scope maps. Since this list may be incomplete, the nextLink field should be used to request the next list of scope maps."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScopeMap>,
     #[doc = "The URI that can be used to request the next list of scope maps."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5205,7 +5438,11 @@ pub struct ScopeMapPropertiesUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of scope permissions for registry artifacts.\r\nE.g. repositories/repository-name/pull, \r\nrepositories/repository-name/delete"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
 }
 impl ScopeMapPropertiesUpdateParameters {
@@ -5639,7 +5876,12 @@ pub struct SourceTriggerUpdateParameters {
     #[serde(rename = "sourceRepository", default, skip_serializing_if = "Option::is_none")]
     pub source_repository: Option<SourceUpdateParameters>,
     #[doc = "The source event corresponding to the trigger."]
-    #[serde(rename = "sourceTriggerEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceTriggerEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_trigger_events: Vec<String>,
     #[doc = "The current status of trigger."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6045,7 +6287,11 @@ impl Task {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Task>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6292,7 +6538,11 @@ impl TaskRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskRunListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TaskRun>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6441,7 +6691,12 @@ pub struct TaskStepProperties {
     #[serde(rename = "type")]
     pub type_: task_step_properties::Type,
     #[doc = "List of base image dependencies for a step."]
-    #[serde(rename = "baseImageDependencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "baseImageDependencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub base_image_dependencies: Vec<BaseImageDependency>,
     #[doc = "The URL(absolute or relative) of the source context for the task step."]
     #[serde(rename = "contextPath", default, skip_serializing_if = "Option::is_none")]
@@ -6915,9 +7170,17 @@ pub mod token_certificate {
 #[doc = "The properties of the credentials that can be used for authenticating the token."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TokenCredentialsProperties {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<TokenCertificate>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<TokenPassword>,
 }
 impl TokenCredentialsProperties {
@@ -6929,7 +7192,11 @@ impl TokenCredentialsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TokenListResult {
     #[doc = "The list of tokens. Since this list may be incomplete, the nextLink field should be used to request the next list of tokens."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Token>,
     #[doc = "The URI that can be used to request the next list of tokens."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7196,10 +7463,20 @@ pub mod token_update_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TriggerProperties {
     #[doc = "The collection of timer triggers."]
-    #[serde(rename = "timerTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timerTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub timer_triggers: Vec<TimerTrigger>,
     #[doc = "The collection of triggers based on source code repository."]
-    #[serde(rename = "sourceTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_triggers: Vec<SourceTrigger>,
     #[doc = "The trigger based on base image dependency."]
     #[serde(rename = "baseImageTrigger", default, skip_serializing_if = "Option::is_none")]
@@ -7214,10 +7491,20 @@ impl TriggerProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TriggerUpdateParameters {
     #[doc = "The collection of timer triggers."]
-    #[serde(rename = "timerTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timerTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub timer_triggers: Vec<TimerTriggerUpdateParameters>,
     #[doc = "The collection of triggers based on source code repository."]
-    #[serde(rename = "sourceTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_triggers: Vec<SourceTriggerUpdateParameters>,
     #[doc = "The properties for updating base image dependency trigger."]
     #[serde(rename = "baseImageTrigger", default, skip_serializing_if = "Option::is_none")]
@@ -7443,7 +7730,11 @@ impl WebhookCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebhookListResult {
     #[doc = "The list of webhooks. Since this list may be incomplete, the nextLink field should be used to request the next list of webhooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Webhook>,
     #[doc = "The URI that can be used to request the next list of webhooks."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7659,7 +7950,11 @@ pub struct WebhookPropertiesUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scope: Option<String>,
     #[doc = "The list of actions that trigger the webhook to post notifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
 }
 impl WebhookPropertiesUpdateParameters {
diff --git a/services/mgmt/containerregistry/src/package_2022_02_preview/models.rs b/services/mgmt/containerregistry/src/package_2022_02_preview/models.rs
index f64d45a72e..63195061ae 100644
--- a/services/mgmt/containerregistry/src/package_2022_02_preview/models.rs
+++ b/services/mgmt/containerregistry/src/package_2022_02_preview/models.rs
@@ -103,7 +103,11 @@ impl AgentPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentPoolListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AgentPool>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -888,7 +892,11 @@ impl ConnectedRegistry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectedRegistryListResult {
     #[doc = "The list of connected registries. Since this list may be incomplete, the nextLink field should be used to request the next list of connected registries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectedRegistry>,
     #[doc = "The URI that can be used to request the next list of connected registries."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -928,7 +936,12 @@ pub struct ConnectedRegistryProperties {
     #[doc = "The properties of the connected registry parent."]
     pub parent: ParentProperties,
     #[doc = "The list of the ACR token resource IDs used to authenticate clients to the connected registry."]
-    #[serde(rename = "clientTokenIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientTokenIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_token_ids: Vec<String>,
     #[doc = "The login server properties of the connected registry."]
     #[serde(rename = "loginServer", default, skip_serializing_if = "Option::is_none")]
@@ -937,10 +950,20 @@ pub struct ConnectedRegistryProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub logging: Option<LoggingProperties>,
     #[doc = "The list of current statuses of the connected registry."]
-    #[serde(rename = "statusDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_details: Vec<StatusDetailProperties>,
     #[doc = "The list of notifications subscription information for the connected registry."]
-    #[serde(rename = "notificationsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notifications_list: Vec<String>,
 }
 impl ConnectedRegistryProperties {
@@ -1113,10 +1136,20 @@ pub struct ConnectedRegistryUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub logging: Option<LoggingProperties>,
     #[doc = "The list of the ACR token resource IDs used to authenticate clients to the connected registry."]
-    #[serde(rename = "clientTokenIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientTokenIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_token_ids: Vec<String>,
     #[doc = "The list of notifications subscription information for the connected registry."]
-    #[serde(rename = "notificationsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notifications_list: Vec<String>,
 }
 impl ConnectedRegistryUpdateProperties {
@@ -1163,7 +1196,12 @@ pub struct DockerBuildRequest {
     #[serde(flatten)]
     pub run_request: RunRequest,
     #[doc = "The fully qualified image names including the repository and tag."]
-    #[serde(rename = "imageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_names: Vec<String>,
     #[doc = "The value of this property indicates whether the image built should be pushed to the registry or not."]
     #[serde(rename = "isPushEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -1178,7 +1216,11 @@ pub struct DockerBuildRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The collection of override arguments to be used when executing the run."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
     #[doc = "Run timeout in seconds."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1219,7 +1261,12 @@ pub struct DockerBuildStep {
     #[serde(flatten)]
     pub task_step_properties: TaskStepProperties,
     #[doc = "The fully qualified image names including the repository and tag."]
-    #[serde(rename = "imageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_names: Vec<String>,
     #[doc = "The value of this property indicates whether the image built should be pushed to the registry or not."]
     #[serde(rename = "isPushEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -1234,7 +1281,11 @@ pub struct DockerBuildStep {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The collection of override arguments to be used when executing this build step."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
 }
 impl DockerBuildStep {
@@ -1256,7 +1307,12 @@ pub struct DockerBuildStepUpdateParameters {
     #[serde(flatten)]
     pub task_step_update_parameters: TaskStepUpdateParameters,
     #[doc = "The fully qualified image names including the repository and tag."]
-    #[serde(rename = "imageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_names: Vec<String>,
     #[doc = "The value of this property indicates whether the image built should be pushed to the registry or not."]
     #[serde(rename = "isPushEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -1268,7 +1324,11 @@ pub struct DockerBuildStepUpdateParameters {
     #[serde(rename = "dockerFilePath", default, skip_serializing_if = "Option::is_none")]
     pub docker_file_path: Option<String>,
     #[doc = "The collection of override arguments to be used when executing this build step."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
     #[doc = "The name of the target build stage for the docker build."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1299,7 +1359,11 @@ pub struct EncodedTaskRunRequest {
     #[serde(rename = "encodedValuesContent", default, skip_serializing_if = "Option::is_none")]
     pub encoded_values_content: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
     #[doc = "Run timeout in seconds."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1343,7 +1407,11 @@ pub struct EncodedTaskStep {
     #[serde(rename = "encodedValuesContent", default, skip_serializing_if = "Option::is_none")]
     pub encoded_values_content: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl EncodedTaskStep {
@@ -1368,7 +1436,11 @@ pub struct EncodedTaskStepUpdateParameters {
     #[serde(rename = "encodedValuesContent", default, skip_serializing_if = "Option::is_none")]
     pub encoded_values_content: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl EncodedTaskStepUpdateParameters {
@@ -1465,7 +1537,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "an array of additional nested error response info objects, as described by this contract."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<InnerErrorDescription>,
 }
 impl ErrorResponseBody {
@@ -1541,7 +1617,11 @@ impl EventInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventListResult {
     #[doc = "The list of events. Since this list may be incomplete, the nextLink field should be used to request the next list of events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Event>,
     #[doc = "The URI that can be used to request the next list of events."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1630,7 +1710,11 @@ impl ExportPipeline {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExportPipelineListResult {
     #[doc = "The list of export pipelines. Since this list may be incomplete, the nextLink field should be used to request the next list of export pipelines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExportPipeline>,
     #[doc = "The URI that can be used to request the next list of pipeline runs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1653,7 +1737,11 @@ pub struct ExportPipelineProperties {
     #[doc = "The properties of the export pipeline target."]
     pub target: ExportPipelineTargetProperties,
     #[doc = "The list of all options configured for the pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub options: Vec<String>,
     #[doc = "The provisioning state of the pipeline at the time the operation was called."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1809,7 +1897,11 @@ pub struct FileTaskRunRequest {
     #[serde(rename = "valuesFilePath", default, skip_serializing_if = "Option::is_none")]
     pub values_file_path: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
     #[doc = "Run timeout in seconds."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1853,7 +1945,11 @@ pub struct FileTaskStep {
     #[serde(rename = "valuesFilePath", default, skip_serializing_if = "Option::is_none")]
     pub values_file_path: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl FileTaskStep {
@@ -1878,7 +1974,11 @@ pub struct FileTaskStepUpdateParameters {
     #[serde(rename = "valuesFilePath", default, skip_serializing_if = "Option::is_none")]
     pub values_file_path: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
 }
 impl FileTaskStepUpdateParameters {
@@ -1958,7 +2058,11 @@ pub struct GenerateCredentialsResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub username: Option<String>,
     #[doc = "The list of passwords for a container registry."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<TokenPassword>,
 }
 impl GenerateCredentialsResult {
@@ -2087,7 +2191,11 @@ pub struct ImageUpdateTrigger {
     #[serde(default, with = "azure_core::date::rfc3339::option")]
     pub timestamp: Option<time::OffsetDateTime>,
     #[doc = "The list of image updates that caused the build."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub images: Vec<ImageDescriptor>,
 }
 impl ImageUpdateTrigger {
@@ -2099,10 +2207,20 @@ impl ImageUpdateTrigger {
 pub struct ImportImageParameters {
     pub source: ImportSource,
     #[doc = "List of strings of the form repo[:tag]. When tag is omitted the source will be used (or 'latest' if source tag is also omitted)."]
-    #[serde(rename = "targetTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_tags: Vec<String>,
     #[doc = "List of strings of repository names to do a manifest only copy. No tag will be created."]
-    #[serde(rename = "untaggedTargetRepositories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "untaggedTargetRepositories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub untagged_target_repositories: Vec<String>,
     #[doc = "When Force, any existing target tags will be overwritten. When NoForce, any existing target tags will fail the operation before any copying begins."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2187,7 +2305,11 @@ impl ImportPipeline {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImportPipelineListResult {
     #[doc = "The list of import pipelines. Since this list may be incomplete, the nextLink field should be used to request the next list of import pipelines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImportPipeline>,
     #[doc = "The URI that can be used to request the next list of pipeline runs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2212,7 +2334,11 @@ pub struct ImportPipelineProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub trigger: Option<PipelineTriggerProperties>,
     #[doc = "The list of all options configured for the pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub options: Vec<String>,
     #[doc = "The provisioning state of the pipeline at the time the operation was called."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2551,7 +2677,12 @@ pub struct NetworkRuleSet {
     #[serde(rename = "defaultAction")]
     pub default_action: network_rule_set::DefaultAction,
     #[doc = "The IP ACL rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
 }
 impl NetworkRuleSet {
@@ -2656,7 +2787,11 @@ impl OperationDisplayDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of container registry operations. Since this list may be incomplete, the nextLink field should be used to request the next list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDefinition>,
     #[doc = "The URI that can be used to request the next list of container registry operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2734,10 +2869,20 @@ impl OperationPropertiesDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationServiceSpecificationDefinition {
     #[doc = "A list of Azure Monitoring metrics definition."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetricSpecificationDefinition>,
     #[doc = "A list of Azure Monitoring log definitions."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationLogSpecificationDefinition>,
 }
 impl OperationServiceSpecificationDefinition {
@@ -2754,13 +2899,21 @@ pub struct OverrideTaskStepProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub file: Option<String>,
     #[doc = "Gets or sets the collection of override arguments to be used when\r\nexecuting a build step."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<Argument>,
     #[doc = "The name of the target build stage for the docker build."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The collection of overridable values that can be passed when running a Task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<SetValue>,
     #[doc = "Base64 encoded update trigger token that will be attached with the base image trigger webhook."]
     #[serde(rename = "updateTriggerToken", default, skip_serializing_if = "Option::is_none")]
@@ -2819,7 +2972,11 @@ impl PipelineRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PipelineRunListResult {
     #[doc = "The list of pipeline runs. Since this list may be incomplete, the nextLink field should be used to request the next list of pipeline runs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PipelineRun>,
     #[doc = "The URI that can be used to request the next list of pipeline runs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2912,7 +3069,11 @@ pub struct PipelineRunRequest {
     #[serde(rename = "pipelineResourceId", default, skip_serializing_if = "Option::is_none")]
     pub pipeline_resource_id: Option<String>,
     #[doc = "List of source artifacts to be transferred by the pipeline. \r\nSpecify an image by repository ('hello-world'). This will use the 'latest' tag.\r\nSpecify an image by tag ('hello-world:latest').\r\nSpecify an image by sha256-based manifest digest ('hello-world@sha256:abc123')."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub source: Option<PipelineRunSourceProperties>,
@@ -2934,7 +3095,12 @@ pub struct PipelineRunResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "The artifacts imported in the pipeline run."]
-    #[serde(rename = "importedArtifacts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "importedArtifacts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub imported_artifacts: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub progress: Option<ProgressProperties>,
@@ -3520,7 +3686,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The list of private endpoint connections. Since this list may be incomplete, the nextLink field should be used to request the next list of private endpoint connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URI that can be used to request the next list of private endpoint connections."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3628,7 +3798,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "The list of private link resources. Since this list may be incomplete, the nextLink field should be used to request the next list of private link resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URI that can be used to request the next list of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3652,10 +3826,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -3906,7 +4090,11 @@ pub struct RegistryListCredentialsResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub username: Option<String>,
     #[doc = "The list of passwords for a container registry."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<RegistryPassword>,
 }
 impl RegistryListCredentialsResult {
@@ -3918,7 +4106,11 @@ impl RegistryListCredentialsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistryListResult {
     #[doc = "The list of container registries. Since this list may be incomplete, the nextLink field should be used to request the next list of container registries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Registry>,
     #[doc = "The URI that can be used to request the next list of container registries."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4032,10 +4224,20 @@ pub struct RegistryProperties {
     #[serde(rename = "dataEndpointEnabled", default, skip_serializing_if = "Option::is_none")]
     pub data_endpoint_enabled: Option<bool>,
     #[doc = "List of host names that will serve data when dataEndpointEnabled is true."]
-    #[serde(rename = "dataEndpointHostNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataEndpointHostNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_endpoint_host_names: Vec<String>,
     #[doc = "List of private endpoint connections for a container registry."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Whether or not public network access is allowed for the container registry."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -4429,7 +4631,11 @@ pub mod registry_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistryUsageListResult {
     #[doc = "The list of container registry quota usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegistryUsage>,
 }
 impl RegistryUsageListResult {
@@ -4458,7 +4664,11 @@ impl Replication {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationListResult {
     #[doc = "The list of replications. Since this list may be incomplete, the nextLink field should be used to request the next list of replications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Replication>,
     #[doc = "The URI that can be used to request the next list of replications."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4895,7 +5105,11 @@ impl RunGetLogResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Run>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4940,7 +5154,12 @@ pub struct RunProperties {
     #[serde(rename = "finishTime", default, with = "azure_core::date::rfc3339::option")]
     pub finish_time: Option<time::OffsetDateTime>,
     #[doc = "The list of all images that were generated from the run. This is applicable if the run generates base image dependencies."]
-    #[serde(rename = "outputImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_images: Vec<ImageDescriptor>,
     #[doc = "The task against which run was scheduled."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4963,7 +5182,12 @@ pub struct RunProperties {
     #[serde(rename = "sourceRegistryAuth", default, skip_serializing_if = "Option::is_none")]
     pub source_registry_auth: Option<String>,
     #[doc = "The list of custom registries that were logged in during this run."]
-    #[serde(rename = "customRegistries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customRegistries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_registries: Vec<String>,
     #[doc = "The error message received from backend systems after the run is scheduled."]
     #[serde(rename = "runErrorMessage", default, skip_serializing_if = "Option::is_none")]
@@ -5180,7 +5404,11 @@ impl ScopeMap {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScopeMapListResult {
     #[doc = "The list of scope maps. Since this list may be incomplete, the nextLink field should be used to request the next list of scope maps."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScopeMap>,
     #[doc = "The URI that can be used to request the next list of scope maps."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5281,7 +5509,11 @@ pub struct ScopeMapPropertiesUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of scope permissions for registry artifacts.\r\nE.g. repositories/repository-name/pull, \r\nrepositories/repository-name/delete"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
 }
 impl ScopeMapPropertiesUpdateParameters {
@@ -5780,7 +6012,12 @@ pub struct SourceTriggerUpdateParameters {
     #[serde(rename = "sourceRepository", default, skip_serializing_if = "Option::is_none")]
     pub source_repository: Option<SourceUpdateParameters>,
     #[doc = "The source event corresponding to the trigger."]
-    #[serde(rename = "sourceTriggerEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceTriggerEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_trigger_events: Vec<String>,
     #[doc = "The current status of trigger."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6197,7 +6434,11 @@ impl Task {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Task>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6444,7 +6685,11 @@ impl TaskRun {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskRunListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TaskRun>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6593,7 +6838,12 @@ pub struct TaskStepProperties {
     #[serde(rename = "type")]
     pub type_: task_step_properties::Type,
     #[doc = "List of base image dependencies for a step."]
-    #[serde(rename = "baseImageDependencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "baseImageDependencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub base_image_dependencies: Vec<BaseImageDependency>,
     #[doc = "The URL(absolute or relative) of the source context for the task step."]
     #[serde(rename = "contextPath", default, skip_serializing_if = "Option::is_none")]
@@ -7067,9 +7317,17 @@ pub mod token_certificate {
 #[doc = "The properties of the credentials that can be used for authenticating the token."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TokenCredentialsProperties {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<TokenCertificate>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<TokenPassword>,
 }
 impl TokenCredentialsProperties {
@@ -7081,7 +7339,11 @@ impl TokenCredentialsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TokenListResult {
     #[doc = "The list of tokens. Since this list may be incomplete, the nextLink field should be used to request the next list of tokens."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Token>,
     #[doc = "The URI that can be used to request the next list of tokens."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7348,10 +7610,20 @@ pub mod token_update_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TriggerProperties {
     #[doc = "The collection of timer triggers."]
-    #[serde(rename = "timerTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timerTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub timer_triggers: Vec<TimerTrigger>,
     #[doc = "The collection of triggers based on source code repository."]
-    #[serde(rename = "sourceTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_triggers: Vec<SourceTrigger>,
     #[doc = "The trigger based on base image dependency."]
     #[serde(rename = "baseImageTrigger", default, skip_serializing_if = "Option::is_none")]
@@ -7366,10 +7638,20 @@ impl TriggerProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TriggerUpdateParameters {
     #[doc = "The collection of timer triggers."]
-    #[serde(rename = "timerTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timerTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub timer_triggers: Vec<TimerTriggerUpdateParameters>,
     #[doc = "The collection of triggers based on source code repository."]
-    #[serde(rename = "sourceTriggers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceTriggers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_triggers: Vec<SourceTriggerUpdateParameters>,
     #[doc = "The properties for updating base image dependency trigger."]
     #[serde(rename = "baseImageTrigger", default, skip_serializing_if = "Option::is_none")]
@@ -7538,7 +7820,11 @@ impl WebhookCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebhookListResult {
     #[doc = "The list of webhooks. Since this list may be incomplete, the nextLink field should be used to request the next list of webhooks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Webhook>,
     #[doc = "The URI that can be used to request the next list of webhooks."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7754,7 +8040,11 @@ pub struct WebhookPropertiesUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scope: Option<String>,
     #[doc = "The list of actions that trigger the webhook to post notifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
 }
 impl WebhookPropertiesUpdateParameters {
diff --git a/services/mgmt/containerservice/src/package_preview_2022_03/models.rs b/services/mgmt/containerservice/src/package_preview_2022_03/models.rs
index 637fbe9b26..60fce98457 100644
--- a/services/mgmt/containerservice/src/package_preview_2022_03/models.rs
+++ b/services/mgmt/containerservice/src/package_preview_2022_03/models.rs
@@ -58,7 +58,12 @@ impl AgentPoolAvailableVersions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentPoolAvailableVersionsProperties {
     #[doc = "List of versions available for agent pool."]
-    #[serde(rename = "agentPoolVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentPoolVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_pool_versions: Vec<serde_json::Value>,
 }
 impl AgentPoolAvailableVersionsProperties {
@@ -70,7 +75,11 @@ impl AgentPoolAvailableVersionsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentPoolListResult {
     #[doc = "The list of agent pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AgentPool>,
     #[doc = "The URL to get the next set of agent pool results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -196,7 +205,11 @@ pub struct AgentPoolUpgradeProfileProperties {
     #[serde(rename = "osType")]
     pub os_type: OsType,
     #[doc = "List of orchestrator types and versions available for upgrade."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upgrades: Vec<serde_json::Value>,
     #[doc = "The latest AKS supported node image version."]
     #[serde(rename = "latestNodeImageVersion", default, skip_serializing_if = "Option::is_none")]
@@ -271,7 +284,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -417,13 +434,28 @@ pub struct ContainerServiceNetworkProfile {
     #[serde(rename = "natGatewayProfile", default, skip_serializing_if = "Option::is_none")]
     pub nat_gateway_profile: Option<ManagedClusterNatGatewayProfile>,
     #[doc = "One IPv4 CIDR is expected for single-stack networking. Two CIDRs, one for each IP family (IPv4/IPv6), is expected for dual-stack networking."]
-    #[serde(rename = "podCidrs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "podCidrs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pod_cidrs: Vec<String>,
     #[doc = "One IPv4 CIDR is expected for single-stack networking. Two CIDRs, one for each IP family (IPv4/IPv6), is expected for dual-stack networking. They must not overlap with any Subnet IP ranges."]
-    #[serde(rename = "serviceCidrs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceCidrs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_cidrs: Vec<String>,
     #[doc = "IP families are used to determine single-stack or dual-stack clusters. For single-stack, the expected value is IPv4. For dual-stack, the expected values are IPv4 and IPv6."]
-    #[serde(rename = "ipFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_families: Vec<String>,
 }
 impl ContainerServiceNetworkProfile {
@@ -1150,7 +1182,11 @@ impl CredentialResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CredentialResults {
     #[doc = "Base64-encoded Kubernetes configuration file."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kubeconfigs: Vec<CredentialResult>,
 }
 impl CredentialResults {
@@ -1165,7 +1201,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The Ports and Protocols used when connecting to domainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -1315,7 +1356,12 @@ pub struct KubeletConfig {
     #[serde(rename = "topologyManagerPolicy", default, skip_serializing_if = "Option::is_none")]
     pub topology_manager_policy: Option<String>,
     #[doc = "Allowed list of unsafe sysctls or unsafe sysctl patterns (ending in `*`)."]
-    #[serde(rename = "allowedUnsafeSysctls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedUnsafeSysctls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_unsafe_sysctls: Vec<String>,
     #[doc = "If set to true it will make the Kubelet fail to start if swap is enabled on the node."]
     #[serde(rename = "failSwapOn", default, skip_serializing_if = "Option::is_none")]
@@ -1454,7 +1500,11 @@ impl MaintenanceConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MaintenanceConfigurationListResult {
     #[doc = "The list of maintenance configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MaintenanceConfiguration>,
     #[doc = "The URL to get the next set of maintenance configuration results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1475,10 +1525,20 @@ impl MaintenanceConfigurationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MaintenanceConfigurationProperties {
     #[doc = "If two array entries specify the same day of the week, the applied configuration is the union of times in both entries."]
-    #[serde(rename = "timeInWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeInWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_in_week: Vec<TimeInWeek>,
     #[doc = "Time slots on which upgrade is not allowed."]
-    #[serde(rename = "notAllowedTime", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notAllowedTime",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_allowed_time: Vec<TimeSpan>,
 }
 impl MaintenanceConfigurationProperties {
@@ -1525,7 +1585,12 @@ pub struct ManagedClusterAadProfile {
     #[serde(rename = "enableAzureRBAC", default, skip_serializing_if = "Option::is_none")]
     pub enable_azure_rbac: Option<bool>,
     #[doc = "The list of AAD group object IDs that will have admin role of the cluster."]
-    #[serde(rename = "adminGroupObjectIDs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "adminGroupObjectIDs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub admin_group_object_i_ds: Vec<String>,
     #[doc = "The client AAD application ID."]
     #[serde(rename = "clientAppID", default, skip_serializing_if = "Option::is_none")]
@@ -1549,7 +1614,12 @@ impl ManagedClusterAadProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterApiServerAccessProfile {
     #[doc = "IP ranges are specified in CIDR format, e.g. 137.117.106.88/29. This feature is not compatible with clusters that use Public IP Per Node, or clusters that are using a Basic Load Balancer. For more information see [API server authorized IP ranges](https://docs.microsoft.com/azure/aks/api-server-authorized-ip-ranges)."]
-    #[serde(rename = "authorizedIPRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizedIPRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorized_ip_ranges: Vec<String>,
     #[doc = "For more details, see [Creating a private AKS cluster](https://docs.microsoft.com/azure/aks/private-clusters)."]
     #[serde(rename = "enablePrivateCluster", default, skip_serializing_if = "Option::is_none")]
@@ -1699,7 +1769,12 @@ pub struct ManagedClusterAgentPoolProfileProperties {
     #[serde(rename = "powerState", default, skip_serializing_if = "Option::is_none")]
     pub power_state: Option<PowerState>,
     #[doc = "The list of Availability zones to use for nodes. This can only be specified if the AgentPoolType property is 'VirtualMachineScaleSets'."]
-    #[serde(rename = "availabilityZones", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilityZones",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_zones: Vec<String>,
     #[doc = "Some scenarios may require nodes in a node pool to receive their own dedicated public IP addresses. A common scenario is for gaming workloads, where a console needs to make a direct connection to a cloud virtual machine to minimize hops. For more information see [assigning a public IP per node](https://docs.microsoft.com/azure/aks/use-multiple-node-pools#assign-a-public-ip-per-node-for-your-node-pools). The default is false."]
     #[serde(rename = "enableNodePublicIP", default, skip_serializing_if = "Option::is_none")]
@@ -1723,7 +1798,12 @@ pub struct ManagedClusterAgentPoolProfileProperties {
     #[serde(rename = "nodeLabels", default, skip_serializing_if = "Option::is_none")]
     pub node_labels: Option<serde_json::Value>,
     #[doc = "The taints added to new nodes during node pool create and scale. For example, key=value:NoSchedule."]
-    #[serde(rename = "nodeTaints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nodeTaints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_taints: Vec<String>,
     #[doc = "The ID for Proximity Placement Group."]
     #[serde(rename = "proximityPlacementGroupID", default, skip_serializing_if = "Option::is_none")]
@@ -1834,10 +1914,20 @@ pub struct ManagedClusterHttpProxyConfig {
     #[serde(rename = "httpsProxy", default, skip_serializing_if = "Option::is_none")]
     pub https_proxy: Option<String>,
     #[doc = "The endpoints that should not go through proxy."]
-    #[serde(rename = "noProxy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "noProxy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub no_proxy: Vec<String>,
     #[doc = "A read-only list of all endpoints for which traffic should not be sent to the proxy. This list is a superset of noProxy and values injected by AKS."]
-    #[serde(rename = "effectiveNoProxy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveNoProxy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_no_proxy: Vec<String>,
     #[doc = "Alternative CA cert to use for connecting to proxy servers."]
     #[serde(rename = "trustedCa", default, skip_serializing_if = "Option::is_none")]
@@ -1910,7 +2000,11 @@ impl ManagedClusterIngressProfileWebAppRouting {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterListResult {
     #[doc = "The list of managed clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedCluster>,
     #[doc = "The URL to get the next set of managed cluster results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1940,7 +2034,12 @@ pub struct ManagedClusterLoadBalancerProfile {
     #[serde(rename = "outboundIPs", default, skip_serializing_if = "Option::is_none")]
     pub outbound_i_ps: Option<managed_cluster_load_balancer_profile::OutboundIPs>,
     #[doc = "The effective outbound IP resources of the cluster load balancer."]
-    #[serde(rename = "effectiveOutboundIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveOutboundIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_outbound_i_ps: Vec<ResourceReference>,
     #[doc = "The desired number of allocated SNAT ports per VM. Allowed values are in the range of 0 to 64000 (inclusive). The default value is 0 which results in Azure dynamically allocating ports."]
     #[serde(rename = "allocatedOutboundPorts", default, skip_serializing_if = "Option::is_none")]
@@ -1978,7 +2077,12 @@ pub mod managed_cluster_load_balancer_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct OutboundIpPrefixes {
         #[doc = "A list of public IP prefix resources."]
-        #[serde(rename = "publicIPPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "publicIPPrefixes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub public_ip_prefixes: Vec<ResourceReference>,
     }
     impl OutboundIpPrefixes {
@@ -1990,7 +2094,12 @@ pub mod managed_cluster_load_balancer_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct OutboundIPs {
         #[doc = "A list of public IP resources."]
-        #[serde(rename = "publicIPs", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "publicIPs",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub public_i_ps: Vec<ResourceReference>,
     }
     impl OutboundIPs {
@@ -2018,7 +2127,12 @@ pub struct ManagedClusterNatGatewayProfile {
     #[serde(rename = "managedOutboundIPProfile", default, skip_serializing_if = "Option::is_none")]
     pub managed_outbound_ip_profile: Option<ManagedClusterManagedOutboundIpProfile>,
     #[doc = "The effective outbound IP resources of the cluster NAT gateway."]
-    #[serde(rename = "effectiveOutboundIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveOutboundIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_outbound_i_ps: Vec<ResourceReference>,
     #[doc = "Desired outbound flow idle timeout in minutes. Allowed values are in the range of 4 to 120 (inclusive). The default value is 4 minutes."]
     #[serde(rename = "idleTimeoutInMinutes", default, skip_serializing_if = "Option::is_none")]
@@ -2159,10 +2273,20 @@ pub struct ManagedClusterPodIdentityProfile {
     #[serde(rename = "allowNetworkPluginKubenet", default, skip_serializing_if = "Option::is_none")]
     pub allow_network_plugin_kubenet: Option<bool>,
     #[doc = "The pod identities to use in the cluster."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<ManagedClusterPodIdentity>,
     #[doc = "The pod identity exceptions to allow."]
-    #[serde(rename = "userAssignedIdentityExceptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentityExceptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identity_exceptions: Vec<ManagedClusterPodIdentityException>,
 }
 impl ManagedClusterPodIdentityProfile {
@@ -2195,7 +2319,11 @@ pub struct ManagedClusterPodIdentityProvisioningErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ManagedClusterPodIdentityProvisioningErrorBody>,
 }
 impl ManagedClusterPodIdentityProvisioningErrorBody {
@@ -2216,7 +2344,11 @@ pub struct ManagedClusterPoolUpgradeProfile {
     #[serde(rename = "osType")]
     pub os_type: OsType,
     #[doc = "List of orchestrator types and versions available for upgrade."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upgrades: Vec<serde_json::Value>,
 }
 impl ManagedClusterPoolUpgradeProfile {
@@ -2266,7 +2398,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "azurePortalFQDN", default, skip_serializing_if = "Option::is_none")]
     pub azure_portal_fqdn: Option<String>,
     #[doc = "The agent pool properties."]
-    #[serde(rename = "agentPoolProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentPoolProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_pool_profiles: Vec<ManagedClusterAgentPoolProfile>,
     #[doc = "Profile for Linux VMs in the container service cluster."]
     #[serde(rename = "linuxProfile", default, skip_serializing_if = "Option::is_none")]
@@ -2320,7 +2457,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "identityProfile", default, skip_serializing_if = "Option::is_none")]
     pub identity_profile: Option<serde_json::Value>,
     #[doc = "Private link resources associated with the cluster."]
-    #[serde(rename = "privateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_resources: Vec<PrivateLinkResource>,
     #[doc = "If set to true, getting static credentials will be disabled for this cluster. This must only be used on Managed Clusters that are AAD enabled. For more details see [disable local accounts](https://docs.microsoft.com/azure/aks/managed-aad#disable-local-accounts-preview)."]
     #[serde(rename = "disableLocalAccounts", default, skip_serializing_if = "Option::is_none")]
@@ -2683,7 +2825,11 @@ impl ManagedClusterSnapshot {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterSnapshotListResult {
     #[doc = "The list of managed cluster snapshots."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedClusterSnapshot>,
     #[doc = "The URL to get the next set of managed cluster snapshot results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3214,7 +3360,11 @@ impl Default for OsType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationValue>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -3274,7 +3424,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that AKS agent nodes connect to"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -3391,7 +3545,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -3481,7 +3639,12 @@ pub struct PrivateLinkResource {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The RequiredMembers of the resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link service ID of the resource, this field is exposed only to NRP internally."]
     #[serde(rename = "privateLinkServiceID", default, skip_serializing_if = "Option::is_none")]
@@ -3496,7 +3659,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourcesListResult {
@@ -3775,7 +3942,11 @@ impl Snapshot {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotListResult {
     #[doc = "The list of snapshots."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Snapshot>,
     #[doc = "The URL to get the next set of snapshot results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3998,7 +4169,12 @@ pub struct TimeInWeek {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub day: Option<WeekDay>,
     #[doc = "Each integer hour represents a time range beginning at 0m after the hour ending at the next hour (non-inclusive). 0 corresponds to 00:00 UTC, 23 corresponds to 23:00 UTC. Specifying [0, 1] means the 00:00 - 02:00 UTC time range."]
-    #[serde(rename = "hourSlots", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hourSlots",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hour_slots: Vec<HourInDay>,
 }
 impl TimeInWeek {
diff --git a/services/mgmt/containerservice/src/package_preview_2022_04/models.rs b/services/mgmt/containerservice/src/package_preview_2022_04/models.rs
index fb959f58ab..9f1e8b4509 100644
--- a/services/mgmt/containerservice/src/package_preview_2022_04/models.rs
+++ b/services/mgmt/containerservice/src/package_preview_2022_04/models.rs
@@ -58,7 +58,12 @@ impl AgentPoolAvailableVersions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentPoolAvailableVersionsProperties {
     #[doc = "List of versions available for agent pool."]
-    #[serde(rename = "agentPoolVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentPoolVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_pool_versions: Vec<serde_json::Value>,
 }
 impl AgentPoolAvailableVersionsProperties {
@@ -70,7 +75,11 @@ impl AgentPoolAvailableVersionsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentPoolListResult {
     #[doc = "The list of agent pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AgentPool>,
     #[doc = "The URL to get the next set of agent pool results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -196,7 +205,11 @@ pub struct AgentPoolUpgradeProfileProperties {
     #[serde(rename = "osType")]
     pub os_type: OsType,
     #[doc = "List of orchestrator types and versions available for upgrade."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upgrades: Vec<serde_json::Value>,
     #[doc = "The latest AKS supported node image version."]
     #[serde(rename = "latestNodeImageVersion", default, skip_serializing_if = "Option::is_none")]
@@ -271,7 +284,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -420,13 +437,28 @@ pub struct ContainerServiceNetworkProfile {
     #[serde(rename = "natGatewayProfile", default, skip_serializing_if = "Option::is_none")]
     pub nat_gateway_profile: Option<ManagedClusterNatGatewayProfile>,
     #[doc = "One IPv4 CIDR is expected for single-stack networking. Two CIDRs, one for each IP family (IPv4/IPv6), is expected for dual-stack networking."]
-    #[serde(rename = "podCidrs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "podCidrs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pod_cidrs: Vec<String>,
     #[doc = "One IPv4 CIDR is expected for single-stack networking. Two CIDRs, one for each IP family (IPv4/IPv6), is expected for dual-stack networking. They must not overlap with any Subnet IP ranges."]
-    #[serde(rename = "serviceCidrs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceCidrs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_cidrs: Vec<String>,
     #[doc = "IP families are used to determine single-stack or dual-stack clusters. For single-stack, the expected value is IPv4. For dual-stack, the expected values are IPv4 and IPv6."]
-    #[serde(rename = "ipFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_families: Vec<String>,
 }
 impl ContainerServiceNetworkProfile {
@@ -1153,7 +1185,11 @@ impl CredentialResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CredentialResults {
     #[doc = "Base64-encoded Kubernetes configuration file."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kubeconfigs: Vec<CredentialResult>,
 }
 impl CredentialResults {
@@ -1168,7 +1204,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The Ports and Protocols used when connecting to domainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -1318,7 +1359,12 @@ pub struct KubeletConfig {
     #[serde(rename = "topologyManagerPolicy", default, skip_serializing_if = "Option::is_none")]
     pub topology_manager_policy: Option<String>,
     #[doc = "Allowed list of unsafe sysctls or unsafe sysctl patterns (ending in `*`)."]
-    #[serde(rename = "allowedUnsafeSysctls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedUnsafeSysctls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_unsafe_sysctls: Vec<String>,
     #[doc = "If set to true it will make the Kubelet fail to start if swap is enabled on the node."]
     #[serde(rename = "failSwapOn", default, skip_serializing_if = "Option::is_none")]
@@ -1457,7 +1503,11 @@ impl MaintenanceConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MaintenanceConfigurationListResult {
     #[doc = "The list of maintenance configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MaintenanceConfiguration>,
     #[doc = "The URL to get the next set of maintenance configuration results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1478,10 +1528,20 @@ impl MaintenanceConfigurationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MaintenanceConfigurationProperties {
     #[doc = "If two array entries specify the same day of the week, the applied configuration is the union of times in both entries."]
-    #[serde(rename = "timeInWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeInWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_in_week: Vec<TimeInWeek>,
     #[doc = "Time slots on which upgrade is not allowed."]
-    #[serde(rename = "notAllowedTime", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notAllowedTime",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_allowed_time: Vec<TimeSpan>,
 }
 impl MaintenanceConfigurationProperties {
@@ -1528,7 +1588,12 @@ pub struct ManagedClusterAadProfile {
     #[serde(rename = "enableAzureRBAC", default, skip_serializing_if = "Option::is_none")]
     pub enable_azure_rbac: Option<bool>,
     #[doc = "The list of AAD group object IDs that will have admin role of the cluster."]
-    #[serde(rename = "adminGroupObjectIDs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "adminGroupObjectIDs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub admin_group_object_i_ds: Vec<String>,
     #[doc = "The client AAD application ID."]
     #[serde(rename = "clientAppID", default, skip_serializing_if = "Option::is_none")]
@@ -1552,7 +1617,12 @@ impl ManagedClusterAadProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterApiServerAccessProfile {
     #[doc = "IP ranges are specified in CIDR format, e.g. 137.117.106.88/29. This feature is not compatible with clusters that use Public IP Per Node, or clusters that are using a Basic Load Balancer. For more information see [API server authorized IP ranges](https://docs.microsoft.com/azure/aks/api-server-authorized-ip-ranges)."]
-    #[serde(rename = "authorizedIPRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizedIPRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorized_ip_ranges: Vec<String>,
     #[doc = "For more details, see [Creating a private AKS cluster](https://docs.microsoft.com/azure/aks/private-clusters)."]
     #[serde(rename = "enablePrivateCluster", default, skip_serializing_if = "Option::is_none")]
@@ -1708,7 +1778,12 @@ pub struct ManagedClusterAgentPoolProfileProperties {
     #[serde(rename = "powerState", default, skip_serializing_if = "Option::is_none")]
     pub power_state: Option<PowerState>,
     #[doc = "The list of Availability zones to use for nodes. This can only be specified if the AgentPoolType property is 'VirtualMachineScaleSets'."]
-    #[serde(rename = "availabilityZones", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilityZones",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_zones: Vec<String>,
     #[doc = "Some scenarios may require nodes in a node pool to receive their own dedicated public IP addresses. A common scenario is for gaming workloads, where a console needs to make a direct connection to a cloud virtual machine to minimize hops. For more information see [assigning a public IP per node](https://docs.microsoft.com/azure/aks/use-multiple-node-pools#assign-a-public-ip-per-node-for-your-node-pools). The default is false."]
     #[serde(rename = "enableNodePublicIP", default, skip_serializing_if = "Option::is_none")]
@@ -1735,7 +1810,12 @@ pub struct ManagedClusterAgentPoolProfileProperties {
     #[serde(rename = "nodeLabels", default, skip_serializing_if = "Option::is_none")]
     pub node_labels: Option<serde_json::Value>,
     #[doc = "The taints added to new nodes during node pool create and scale. For example, key=value:NoSchedule."]
-    #[serde(rename = "nodeTaints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nodeTaints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_taints: Vec<String>,
     #[doc = "The ID for Proximity Placement Group."]
     #[serde(rename = "proximityPlacementGroupID", default, skip_serializing_if = "Option::is_none")]
@@ -1846,10 +1926,20 @@ pub struct ManagedClusterHttpProxyConfig {
     #[serde(rename = "httpsProxy", default, skip_serializing_if = "Option::is_none")]
     pub https_proxy: Option<String>,
     #[doc = "The endpoints that should not go through proxy."]
-    #[serde(rename = "noProxy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "noProxy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub no_proxy: Vec<String>,
     #[doc = "A read-only list of all endpoints for which traffic should not be sent to the proxy. This list is a superset of noProxy and values injected by AKS."]
-    #[serde(rename = "effectiveNoProxy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveNoProxy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_no_proxy: Vec<String>,
     #[doc = "Alternative CA cert to use for connecting to proxy servers."]
     #[serde(rename = "trustedCa", default, skip_serializing_if = "Option::is_none")]
@@ -1922,7 +2012,11 @@ impl ManagedClusterIngressProfileWebAppRouting {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterListResult {
     #[doc = "The list of managed clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedCluster>,
     #[doc = "The URL to get the next set of managed cluster results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1952,7 +2046,12 @@ pub struct ManagedClusterLoadBalancerProfile {
     #[serde(rename = "outboundIPs", default, skip_serializing_if = "Option::is_none")]
     pub outbound_i_ps: Option<managed_cluster_load_balancer_profile::OutboundIPs>,
     #[doc = "The effective outbound IP resources of the cluster load balancer."]
-    #[serde(rename = "effectiveOutboundIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveOutboundIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_outbound_i_ps: Vec<ResourceReference>,
     #[doc = "The desired number of allocated SNAT ports per VM. Allowed values are in the range of 0 to 64000 (inclusive). The default value is 0 which results in Azure dynamically allocating ports."]
     #[serde(rename = "allocatedOutboundPorts", default, skip_serializing_if = "Option::is_none")]
@@ -1990,7 +2089,12 @@ pub mod managed_cluster_load_balancer_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct OutboundIpPrefixes {
         #[doc = "A list of public IP prefix resources."]
-        #[serde(rename = "publicIPPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "publicIPPrefixes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub public_ip_prefixes: Vec<ResourceReference>,
     }
     impl OutboundIpPrefixes {
@@ -2002,7 +2106,12 @@ pub mod managed_cluster_load_balancer_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct OutboundIPs {
         #[doc = "A list of public IP resources."]
-        #[serde(rename = "publicIPs", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "publicIPs",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub public_i_ps: Vec<ResourceReference>,
     }
     impl OutboundIPs {
@@ -2030,7 +2139,12 @@ pub struct ManagedClusterNatGatewayProfile {
     #[serde(rename = "managedOutboundIPProfile", default, skip_serializing_if = "Option::is_none")]
     pub managed_outbound_ip_profile: Option<ManagedClusterManagedOutboundIpProfile>,
     #[doc = "The effective outbound IP resources of the cluster NAT gateway."]
-    #[serde(rename = "effectiveOutboundIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveOutboundIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_outbound_i_ps: Vec<ResourceReference>,
     #[doc = "Desired outbound flow idle timeout in minutes. Allowed values are in the range of 4 to 120 (inclusive). The default value is 4 minutes."]
     #[serde(rename = "idleTimeoutInMinutes", default, skip_serializing_if = "Option::is_none")]
@@ -2171,10 +2285,20 @@ pub struct ManagedClusterPodIdentityProfile {
     #[serde(rename = "allowNetworkPluginKubenet", default, skip_serializing_if = "Option::is_none")]
     pub allow_network_plugin_kubenet: Option<bool>,
     #[doc = "The pod identities to use in the cluster."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<ManagedClusterPodIdentity>,
     #[doc = "The pod identity exceptions to allow."]
-    #[serde(rename = "userAssignedIdentityExceptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentityExceptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identity_exceptions: Vec<ManagedClusterPodIdentityException>,
 }
 impl ManagedClusterPodIdentityProfile {
@@ -2207,7 +2331,11 @@ pub struct ManagedClusterPodIdentityProvisioningErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ManagedClusterPodIdentityProvisioningErrorBody>,
 }
 impl ManagedClusterPodIdentityProvisioningErrorBody {
@@ -2228,7 +2356,11 @@ pub struct ManagedClusterPoolUpgradeProfile {
     #[serde(rename = "osType")]
     pub os_type: OsType,
     #[doc = "List of orchestrator types and versions available for upgrade."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upgrades: Vec<serde_json::Value>,
 }
 impl ManagedClusterPoolUpgradeProfile {
@@ -2278,7 +2410,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "azurePortalFQDN", default, skip_serializing_if = "Option::is_none")]
     pub azure_portal_fqdn: Option<String>,
     #[doc = "The agent pool properties."]
-    #[serde(rename = "agentPoolProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentPoolProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_pool_profiles: Vec<ManagedClusterAgentPoolProfile>,
     #[doc = "Profile for Linux VMs in the container service cluster."]
     #[serde(rename = "linuxProfile", default, skip_serializing_if = "Option::is_none")]
@@ -2332,7 +2469,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "identityProfile", default, skip_serializing_if = "Option::is_none")]
     pub identity_profile: Option<serde_json::Value>,
     #[doc = "Private link resources associated with the cluster."]
-    #[serde(rename = "privateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_resources: Vec<PrivateLinkResource>,
     #[doc = "If set to true, getting static credentials will be disabled for this cluster. This must only be used on Managed Clusters that are AAD enabled. For more details see [disable local accounts](https://docs.microsoft.com/azure/aks/managed-aad#disable-local-accounts-preview)."]
     #[serde(rename = "disableLocalAccounts", default, skip_serializing_if = "Option::is_none")]
@@ -2698,7 +2840,11 @@ impl ManagedClusterSnapshot {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterSnapshotListResult {
     #[doc = "The list of managed cluster snapshots."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedClusterSnapshot>,
     #[doc = "The URL to get the next set of managed cluster snapshot results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3271,7 +3417,11 @@ impl Default for OsType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationValue>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -3331,7 +3481,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that AKS agent nodes connect to"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -3448,7 +3602,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -3538,7 +3696,12 @@ pub struct PrivateLinkResource {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The RequiredMembers of the resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link service ID of the resource, this field is exposed only to NRP internally."]
     #[serde(rename = "privateLinkServiceID", default, skip_serializing_if = "Option::is_none")]
@@ -3553,7 +3716,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourcesListResult {
@@ -3832,7 +3999,11 @@ impl Snapshot {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotListResult {
     #[doc = "The list of snapshots."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Snapshot>,
     #[doc = "The URL to get the next set of snapshot results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4055,7 +4226,12 @@ pub struct TimeInWeek {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub day: Option<WeekDay>,
     #[doc = "Each integer hour represents a time range beginning at 0m after the hour ending at the next hour (non-inclusive). 0 corresponds to 00:00 UTC, 23 corresponds to 23:00 UTC. Specifying [0, 1] means the 00:00 - 02:00 UTC time range."]
-    #[serde(rename = "hourSlots", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hourSlots",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hour_slots: Vec<HourInDay>,
 }
 impl TimeInWeek {
@@ -4108,7 +4284,11 @@ pub struct TrustedAccessRole {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of rules for the role. This maps to 'rules' property of [Kubernetes Cluster Role](https://kubernetes.io/docs/reference/kubernetes-api/authorization-resources/cluster-role-v1/#ClusterRole)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<TrustedAccessRoleRule>,
 }
 impl TrustedAccessRole {
@@ -4136,7 +4316,11 @@ impl TrustedAccessRoleBinding {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrustedAccessRoleBindingListResult {
     #[doc = "Role binding list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TrustedAccessRoleBinding>,
     #[doc = "Link to next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4222,7 +4406,11 @@ pub mod trusted_access_role_binding_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrustedAccessRoleListResult {
     #[doc = "Role list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TrustedAccessRole>,
     #[doc = "Link to next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4243,19 +4431,42 @@ impl TrustedAccessRoleListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrustedAccessRoleRule {
     #[doc = "List of allowed verbs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub verbs: Vec<String>,
     #[doc = "List of allowed apiGroups"]
-    #[serde(rename = "apiGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_groups: Vec<String>,
     #[doc = "List of allowed resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
     #[doc = "List of allowed names"]
-    #[serde(rename = "resourceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_names: Vec<String>,
     #[doc = "List of allowed nonResourceURLs"]
-    #[serde(rename = "nonResourceURLs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nonResourceURLs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub non_resource_ur_ls: Vec<String>,
 }
 impl TrustedAccessRoleRule {
diff --git a/services/mgmt/containerservice/src/package_preview_2022_05/models.rs b/services/mgmt/containerservice/src/package_preview_2022_05/models.rs
index cccf9ea36e..dd1e212f25 100644
--- a/services/mgmt/containerservice/src/package_preview_2022_05/models.rs
+++ b/services/mgmt/containerservice/src/package_preview_2022_05/models.rs
@@ -58,7 +58,12 @@ impl AgentPoolAvailableVersions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentPoolAvailableVersionsProperties {
     #[doc = "List of versions available for agent pool."]
-    #[serde(rename = "agentPoolVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentPoolVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_pool_versions: Vec<serde_json::Value>,
 }
 impl AgentPoolAvailableVersionsProperties {
@@ -70,7 +75,11 @@ impl AgentPoolAvailableVersionsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentPoolListResult {
     #[doc = "The list of agent pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AgentPool>,
     #[doc = "The URL to get the next set of agent pool results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -196,7 +205,11 @@ pub struct AgentPoolUpgradeProfileProperties {
     #[serde(rename = "osType")]
     pub os_type: OsType,
     #[doc = "List of orchestrator types and versions available for upgrade."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upgrades: Vec<serde_json::Value>,
     #[doc = "The latest AKS supported node image version."]
     #[serde(rename = "latestNodeImageVersion", default, skip_serializing_if = "Option::is_none")]
@@ -322,7 +335,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -471,13 +488,28 @@ pub struct ContainerServiceNetworkProfile {
     #[serde(rename = "natGatewayProfile", default, skip_serializing_if = "Option::is_none")]
     pub nat_gateway_profile: Option<ManagedClusterNatGatewayProfile>,
     #[doc = "One IPv4 CIDR is expected for single-stack networking. Two CIDRs, one for each IP family (IPv4/IPv6), is expected for dual-stack networking."]
-    #[serde(rename = "podCidrs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "podCidrs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pod_cidrs: Vec<String>,
     #[doc = "One IPv4 CIDR is expected for single-stack networking. Two CIDRs, one for each IP family (IPv4/IPv6), is expected for dual-stack networking. They must not overlap with any Subnet IP ranges."]
-    #[serde(rename = "serviceCidrs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceCidrs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_cidrs: Vec<String>,
     #[doc = "IP families are used to determine single-stack or dual-stack clusters. For single-stack, the expected value is IPv4. For dual-stack, the expected values are IPv4 and IPv6."]
-    #[serde(rename = "ipFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_families: Vec<String>,
 }
 impl ContainerServiceNetworkProfile {
@@ -1204,7 +1236,11 @@ impl CredentialResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CredentialResults {
     #[doc = "Base64-encoded Kubernetes configuration file."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kubeconfigs: Vec<CredentialResult>,
 }
 impl CredentialResults {
@@ -1219,7 +1255,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The Ports and Protocols used when connecting to domainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -1369,7 +1410,12 @@ pub struct KubeletConfig {
     #[serde(rename = "topologyManagerPolicy", default, skip_serializing_if = "Option::is_none")]
     pub topology_manager_policy: Option<String>,
     #[doc = "Allowed list of unsafe sysctls or unsafe sysctl patterns (ending in `*`)."]
-    #[serde(rename = "allowedUnsafeSysctls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedUnsafeSysctls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_unsafe_sysctls: Vec<String>,
     #[doc = "If set to true it will make the Kubelet fail to start if swap is enabled on the node."]
     #[serde(rename = "failSwapOn", default, skip_serializing_if = "Option::is_none")]
@@ -1508,7 +1554,11 @@ impl MaintenanceConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MaintenanceConfigurationListResult {
     #[doc = "The list of maintenance configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MaintenanceConfiguration>,
     #[doc = "The URL to get the next set of maintenance configuration results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1529,10 +1579,20 @@ impl MaintenanceConfigurationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MaintenanceConfigurationProperties {
     #[doc = "If two array entries specify the same day of the week, the applied configuration is the union of times in both entries."]
-    #[serde(rename = "timeInWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeInWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_in_week: Vec<TimeInWeek>,
     #[doc = "Time slots on which upgrade is not allowed."]
-    #[serde(rename = "notAllowedTime", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notAllowedTime",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_allowed_time: Vec<TimeSpan>,
 }
 impl MaintenanceConfigurationProperties {
@@ -1579,7 +1639,12 @@ pub struct ManagedClusterAadProfile {
     #[serde(rename = "enableAzureRBAC", default, skip_serializing_if = "Option::is_none")]
     pub enable_azure_rbac: Option<bool>,
     #[doc = "The list of AAD group object IDs that will have admin role of the cluster."]
-    #[serde(rename = "adminGroupObjectIDs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "adminGroupObjectIDs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub admin_group_object_i_ds: Vec<String>,
     #[doc = "The client AAD application ID."]
     #[serde(rename = "clientAppID", default, skip_serializing_if = "Option::is_none")]
@@ -1603,7 +1668,12 @@ impl ManagedClusterAadProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterApiServerAccessProfile {
     #[doc = "IP ranges are specified in CIDR format, e.g. 137.117.106.88/29. This feature is not compatible with clusters that use Public IP Per Node, or clusters that are using a Basic Load Balancer. For more information see [API server authorized IP ranges](https://docs.microsoft.com/azure/aks/api-server-authorized-ip-ranges)."]
-    #[serde(rename = "authorizedIPRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizedIPRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorized_ip_ranges: Vec<String>,
     #[doc = "For more details, see [Creating a private AKS cluster](https://docs.microsoft.com/azure/aks/private-clusters)."]
     #[serde(rename = "enablePrivateCluster", default, skip_serializing_if = "Option::is_none")]
@@ -1759,7 +1829,12 @@ pub struct ManagedClusterAgentPoolProfileProperties {
     #[serde(rename = "powerState", default, skip_serializing_if = "Option::is_none")]
     pub power_state: Option<PowerState>,
     #[doc = "The list of Availability zones to use for nodes. This can only be specified if the AgentPoolType property is 'VirtualMachineScaleSets'."]
-    #[serde(rename = "availabilityZones", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilityZones",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_zones: Vec<String>,
     #[doc = "Some scenarios may require nodes in a node pool to receive their own dedicated public IP addresses. A common scenario is for gaming workloads, where a console needs to make a direct connection to a cloud virtual machine to minimize hops. For more information see [assigning a public IP per node](https://docs.microsoft.com/azure/aks/use-multiple-node-pools#assign-a-public-ip-per-node-for-your-node-pools). The default is false."]
     #[serde(rename = "enableNodePublicIP", default, skip_serializing_if = "Option::is_none")]
@@ -1786,7 +1861,12 @@ pub struct ManagedClusterAgentPoolProfileProperties {
     #[serde(rename = "nodeLabels", default, skip_serializing_if = "Option::is_none")]
     pub node_labels: Option<serde_json::Value>,
     #[doc = "The taints added to new nodes during node pool create and scale. For example, key=value:NoSchedule."]
-    #[serde(rename = "nodeTaints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nodeTaints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_taints: Vec<String>,
     #[doc = "The ID for Proximity Placement Group."]
     #[serde(rename = "proximityPlacementGroupID", default, skip_serializing_if = "Option::is_none")]
@@ -1897,10 +1977,20 @@ pub struct ManagedClusterHttpProxyConfig {
     #[serde(rename = "httpsProxy", default, skip_serializing_if = "Option::is_none")]
     pub https_proxy: Option<String>,
     #[doc = "The endpoints that should not go through proxy."]
-    #[serde(rename = "noProxy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "noProxy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub no_proxy: Vec<String>,
     #[doc = "A read-only list of all endpoints for which traffic should not be sent to the proxy. This list is a superset of noProxy and values injected by AKS."]
-    #[serde(rename = "effectiveNoProxy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveNoProxy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_no_proxy: Vec<String>,
     #[doc = "Alternative CA cert to use for connecting to proxy servers."]
     #[serde(rename = "trustedCa", default, skip_serializing_if = "Option::is_none")]
@@ -1973,7 +2063,11 @@ impl ManagedClusterIngressProfileWebAppRouting {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterListResult {
     #[doc = "The list of managed clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedCluster>,
     #[doc = "The URL to get the next set of managed cluster results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2003,7 +2097,12 @@ pub struct ManagedClusterLoadBalancerProfile {
     #[serde(rename = "outboundIPs", default, skip_serializing_if = "Option::is_none")]
     pub outbound_i_ps: Option<managed_cluster_load_balancer_profile::OutboundIPs>,
     #[doc = "The effective outbound IP resources of the cluster load balancer."]
-    #[serde(rename = "effectiveOutboundIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveOutboundIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_outbound_i_ps: Vec<ResourceReference>,
     #[doc = "The desired number of allocated SNAT ports per VM. Allowed values are in the range of 0 to 64000 (inclusive). The default value is 0 which results in Azure dynamically allocating ports."]
     #[serde(rename = "allocatedOutboundPorts", default, skip_serializing_if = "Option::is_none")]
@@ -2041,7 +2140,12 @@ pub mod managed_cluster_load_balancer_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct OutboundIpPrefixes {
         #[doc = "A list of public IP prefix resources."]
-        #[serde(rename = "publicIPPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "publicIPPrefixes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub public_ip_prefixes: Vec<ResourceReference>,
     }
     impl OutboundIpPrefixes {
@@ -2053,7 +2157,12 @@ pub mod managed_cluster_load_balancer_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct OutboundIPs {
         #[doc = "A list of public IP resources."]
-        #[serde(rename = "publicIPs", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "publicIPs",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub public_i_ps: Vec<ResourceReference>,
     }
     impl OutboundIPs {
@@ -2081,7 +2190,12 @@ pub struct ManagedClusterNatGatewayProfile {
     #[serde(rename = "managedOutboundIPProfile", default, skip_serializing_if = "Option::is_none")]
     pub managed_outbound_ip_profile: Option<ManagedClusterManagedOutboundIpProfile>,
     #[doc = "The effective outbound IP resources of the cluster NAT gateway."]
-    #[serde(rename = "effectiveOutboundIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveOutboundIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_outbound_i_ps: Vec<ResourceReference>,
     #[doc = "Desired outbound flow idle timeout in minutes. Allowed values are in the range of 4 to 120 (inclusive). The default value is 4 minutes."]
     #[serde(rename = "idleTimeoutInMinutes", default, skip_serializing_if = "Option::is_none")]
@@ -2222,10 +2336,20 @@ pub struct ManagedClusterPodIdentityProfile {
     #[serde(rename = "allowNetworkPluginKubenet", default, skip_serializing_if = "Option::is_none")]
     pub allow_network_plugin_kubenet: Option<bool>,
     #[doc = "The pod identities to use in the cluster."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<ManagedClusterPodIdentity>,
     #[doc = "The pod identity exceptions to allow."]
-    #[serde(rename = "userAssignedIdentityExceptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentityExceptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identity_exceptions: Vec<ManagedClusterPodIdentityException>,
 }
 impl ManagedClusterPodIdentityProfile {
@@ -2258,7 +2382,11 @@ pub struct ManagedClusterPodIdentityProvisioningErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ManagedClusterPodIdentityProvisioningErrorBody>,
 }
 impl ManagedClusterPodIdentityProvisioningErrorBody {
@@ -2279,7 +2407,11 @@ pub struct ManagedClusterPoolUpgradeProfile {
     #[serde(rename = "osType")]
     pub os_type: OsType,
     #[doc = "List of orchestrator types and versions available for upgrade."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upgrades: Vec<serde_json::Value>,
 }
 impl ManagedClusterPoolUpgradeProfile {
@@ -2329,7 +2461,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "azurePortalFQDN", default, skip_serializing_if = "Option::is_none")]
     pub azure_portal_fqdn: Option<String>,
     #[doc = "The agent pool properties."]
-    #[serde(rename = "agentPoolProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentPoolProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_pool_profiles: Vec<ManagedClusterAgentPoolProfile>,
     #[doc = "Profile for Linux VMs in the container service cluster."]
     #[serde(rename = "linuxProfile", default, skip_serializing_if = "Option::is_none")]
@@ -2383,7 +2520,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "identityProfile", default, skip_serializing_if = "Option::is_none")]
     pub identity_profile: Option<serde_json::Value>,
     #[doc = "Private link resources associated with the cluster."]
-    #[serde(rename = "privateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_resources: Vec<PrivateLinkResource>,
     #[doc = "If set to true, getting static credentials will be disabled for this cluster. This must only be used on Managed Clusters that are AAD enabled. For more details see [disable local accounts](https://docs.microsoft.com/azure/aks/managed-aad#disable-local-accounts-preview)."]
     #[serde(rename = "disableLocalAccounts", default, skip_serializing_if = "Option::is_none")]
@@ -2764,7 +2906,11 @@ impl ManagedClusterSnapshot {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterSnapshotListResult {
     #[doc = "The list of managed cluster snapshots."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedClusterSnapshot>,
     #[doc = "The URL to get the next set of managed cluster snapshot results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3375,7 +3521,11 @@ impl Default for OsType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationValue>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -3435,7 +3585,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that AKS agent nodes connect to"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -3552,7 +3706,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -3642,7 +3800,12 @@ pub struct PrivateLinkResource {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The RequiredMembers of the resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link service ID of the resource, this field is exposed only to NRP internally."]
     #[serde(rename = "privateLinkServiceID", default, skip_serializing_if = "Option::is_none")]
@@ -3657,7 +3820,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourcesListResult {
@@ -3936,7 +4103,11 @@ impl Snapshot {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotListResult {
     #[doc = "The list of snapshots."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Snapshot>,
     #[doc = "The URL to get the next set of snapshot results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4159,7 +4330,12 @@ pub struct TimeInWeek {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub day: Option<WeekDay>,
     #[doc = "Each integer hour represents a time range beginning at 0m after the hour ending at the next hour (non-inclusive). 0 corresponds to 00:00 UTC, 23 corresponds to 23:00 UTC. Specifying [0, 1] means the 00:00 - 02:00 UTC time range."]
-    #[serde(rename = "hourSlots", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hourSlots",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hour_slots: Vec<HourInDay>,
 }
 impl TimeInWeek {
@@ -4212,7 +4388,11 @@ pub struct TrustedAccessRole {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of rules for the role. This maps to 'rules' property of [Kubernetes Cluster Role](https://kubernetes.io/docs/reference/kubernetes-api/authorization-resources/cluster-role-v1/#ClusterRole)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<TrustedAccessRoleRule>,
 }
 impl TrustedAccessRole {
@@ -4240,7 +4420,11 @@ impl TrustedAccessRoleBinding {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrustedAccessRoleBindingListResult {
     #[doc = "Role binding list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TrustedAccessRoleBinding>,
     #[doc = "Link to next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4326,7 +4510,11 @@ pub mod trusted_access_role_binding_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrustedAccessRoleListResult {
     #[doc = "Role list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TrustedAccessRole>,
     #[doc = "Link to next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4347,19 +4535,42 @@ impl TrustedAccessRoleListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrustedAccessRoleRule {
     #[doc = "List of allowed verbs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub verbs: Vec<String>,
     #[doc = "List of allowed apiGroups"]
-    #[serde(rename = "apiGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_groups: Vec<String>,
     #[doc = "List of allowed resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
     #[doc = "List of allowed names"]
-    #[serde(rename = "resourceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_names: Vec<String>,
     #[doc = "List of allowed nonResourceURLs"]
-    #[serde(rename = "nonResourceURLs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nonResourceURLs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub non_resource_ur_ls: Vec<String>,
 }
 impl TrustedAccessRoleRule {
diff --git a/services/mgmt/containerservice/src/package_preview_2022_06/models.rs b/services/mgmt/containerservice/src/package_preview_2022_06/models.rs
index 4e35a5315d..ba8f224657 100644
--- a/services/mgmt/containerservice/src/package_preview_2022_06/models.rs
+++ b/services/mgmt/containerservice/src/package_preview_2022_06/models.rs
@@ -58,7 +58,12 @@ impl AgentPoolAvailableVersions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentPoolAvailableVersionsProperties {
     #[doc = "List of versions available for agent pool."]
-    #[serde(rename = "agentPoolVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentPoolVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_pool_versions: Vec<serde_json::Value>,
 }
 impl AgentPoolAvailableVersionsProperties {
@@ -70,7 +75,11 @@ impl AgentPoolAvailableVersionsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentPoolListResult {
     #[doc = "The list of agent pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AgentPool>,
     #[doc = "The URL to get the next set of agent pool results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -196,7 +205,11 @@ pub struct AgentPoolUpgradeProfileProperties {
     #[serde(rename = "osType")]
     pub os_type: OsType,
     #[doc = "List of orchestrator types and versions available for upgrade."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upgrades: Vec<serde_json::Value>,
     #[doc = "The latest AKS supported node image version."]
     #[serde(rename = "latestNodeImageVersion", default, skip_serializing_if = "Option::is_none")]
@@ -336,7 +349,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -485,13 +502,28 @@ pub struct ContainerServiceNetworkProfile {
     #[serde(rename = "natGatewayProfile", default, skip_serializing_if = "Option::is_none")]
     pub nat_gateway_profile: Option<ManagedClusterNatGatewayProfile>,
     #[doc = "One IPv4 CIDR is expected for single-stack networking. Two CIDRs, one for each IP family (IPv4/IPv6), is expected for dual-stack networking."]
-    #[serde(rename = "podCidrs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "podCidrs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pod_cidrs: Vec<String>,
     #[doc = "One IPv4 CIDR is expected for single-stack networking. Two CIDRs, one for each IP family (IPv4/IPv6), is expected for dual-stack networking. They must not overlap with any Subnet IP ranges."]
-    #[serde(rename = "serviceCidrs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceCidrs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_cidrs: Vec<String>,
     #[doc = "IP families are used to determine single-stack or dual-stack clusters. For single-stack, the expected value is IPv4. For dual-stack, the expected values are IPv4 and IPv6."]
-    #[serde(rename = "ipFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_families: Vec<String>,
 }
 impl ContainerServiceNetworkProfile {
@@ -1218,7 +1250,11 @@ impl CredentialResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CredentialResults {
     #[doc = "Base64-encoded Kubernetes configuration file."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kubeconfigs: Vec<CredentialResult>,
 }
 impl CredentialResults {
@@ -1233,7 +1269,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The Ports and Protocols used when connecting to domainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -1290,10 +1331,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -1409,7 +1459,11 @@ impl FleetCredentialResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FleetCredentialResults {
     #[doc = "Base64-encoded Kubernetes configuration file."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kubeconfigs: Vec<FleetCredentialResult>,
 }
 impl FleetCredentialResults {
@@ -1439,7 +1493,11 @@ impl FleetHubProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FleetListResult {
     #[doc = "The list of Fleets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Fleet>,
     #[doc = "The URL to get the next page of Fleets."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1537,7 +1595,11 @@ pub mod fleet_member_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FleetMembersListResult {
     #[doc = "The list of members in a given Fleet."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FleetMember>,
     #[doc = "The URL to get the next page of Fleet members."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1700,7 +1762,12 @@ pub struct KubeletConfig {
     #[serde(rename = "topologyManagerPolicy", default, skip_serializing_if = "Option::is_none")]
     pub topology_manager_policy: Option<String>,
     #[doc = "Allowed list of unsafe sysctls or unsafe sysctl patterns (ending in `*`)."]
-    #[serde(rename = "allowedUnsafeSysctls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedUnsafeSysctls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_unsafe_sysctls: Vec<String>,
     #[doc = "If set to true it will make the Kubelet fail to start if swap is enabled on the node."]
     #[serde(rename = "failSwapOn", default, skip_serializing_if = "Option::is_none")]
@@ -1839,7 +1906,11 @@ impl MaintenanceConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MaintenanceConfigurationListResult {
     #[doc = "The list of maintenance configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MaintenanceConfiguration>,
     #[doc = "The URL to get the next set of maintenance configuration results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1860,10 +1931,20 @@ impl MaintenanceConfigurationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MaintenanceConfigurationProperties {
     #[doc = "If two array entries specify the same day of the week, the applied configuration is the union of times in both entries."]
-    #[serde(rename = "timeInWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeInWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_in_week: Vec<TimeInWeek>,
     #[doc = "Time slots on which upgrade is not allowed."]
-    #[serde(rename = "notAllowedTime", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notAllowedTime",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_allowed_time: Vec<TimeSpan>,
 }
 impl MaintenanceConfigurationProperties {
@@ -1910,7 +1991,12 @@ pub struct ManagedClusterAadProfile {
     #[serde(rename = "enableAzureRBAC", default, skip_serializing_if = "Option::is_none")]
     pub enable_azure_rbac: Option<bool>,
     #[doc = "The list of AAD group object IDs that will have admin role of the cluster."]
-    #[serde(rename = "adminGroupObjectIDs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "adminGroupObjectIDs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub admin_group_object_i_ds: Vec<String>,
     #[doc = "The client AAD application ID."]
     #[serde(rename = "clientAppID", default, skip_serializing_if = "Option::is_none")]
@@ -1934,7 +2020,12 @@ impl ManagedClusterAadProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterApiServerAccessProfile {
     #[doc = "IP ranges are specified in CIDR format, e.g. 137.117.106.88/29. This feature is not compatible with clusters that use Public IP Per Node, or clusters that are using a Basic Load Balancer. For more information see [API server authorized IP ranges](https://docs.microsoft.com/azure/aks/api-server-authorized-ip-ranges)."]
-    #[serde(rename = "authorizedIPRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizedIPRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorized_ip_ranges: Vec<String>,
     #[doc = "For more details, see [Creating a private AKS cluster](https://docs.microsoft.com/azure/aks/private-clusters)."]
     #[serde(rename = "enablePrivateCluster", default, skip_serializing_if = "Option::is_none")]
@@ -2090,7 +2181,12 @@ pub struct ManagedClusterAgentPoolProfileProperties {
     #[serde(rename = "powerState", default, skip_serializing_if = "Option::is_none")]
     pub power_state: Option<PowerState>,
     #[doc = "The list of Availability zones to use for nodes. This can only be specified if the AgentPoolType property is 'VirtualMachineScaleSets'."]
-    #[serde(rename = "availabilityZones", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilityZones",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_zones: Vec<String>,
     #[doc = "Some scenarios may require nodes in a node pool to receive their own dedicated public IP addresses. A common scenario is for gaming workloads, where a console needs to make a direct connection to a cloud virtual machine to minimize hops. For more information see [assigning a public IP per node](https://docs.microsoft.com/azure/aks/use-multiple-node-pools#assign-a-public-ip-per-node-for-your-node-pools). The default is false."]
     #[serde(rename = "enableNodePublicIP", default, skip_serializing_if = "Option::is_none")]
@@ -2117,7 +2213,12 @@ pub struct ManagedClusterAgentPoolProfileProperties {
     #[serde(rename = "nodeLabels", default, skip_serializing_if = "Option::is_none")]
     pub node_labels: Option<serde_json::Value>,
     #[doc = "The taints added to new nodes during node pool create and scale. For example, key=value:NoSchedule."]
-    #[serde(rename = "nodeTaints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nodeTaints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_taints: Vec<String>,
     #[doc = "The ID for Proximity Placement Group."]
     #[serde(rename = "proximityPlacementGroupID", default, skip_serializing_if = "Option::is_none")]
@@ -2228,10 +2329,20 @@ pub struct ManagedClusterHttpProxyConfig {
     #[serde(rename = "httpsProxy", default, skip_serializing_if = "Option::is_none")]
     pub https_proxy: Option<String>,
     #[doc = "The endpoints that should not go through proxy."]
-    #[serde(rename = "noProxy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "noProxy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub no_proxy: Vec<String>,
     #[doc = "A read-only list of all endpoints for which traffic should not be sent to the proxy. This list is a superset of noProxy and values injected by AKS."]
-    #[serde(rename = "effectiveNoProxy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveNoProxy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_no_proxy: Vec<String>,
     #[doc = "Alternative CA cert to use for connecting to proxy servers."]
     #[serde(rename = "trustedCa", default, skip_serializing_if = "Option::is_none")]
@@ -2304,7 +2415,11 @@ impl ManagedClusterIngressProfileWebAppRouting {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterListResult {
     #[doc = "The list of managed clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedCluster>,
     #[doc = "The URL to get the next set of managed cluster results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2334,7 +2449,12 @@ pub struct ManagedClusterLoadBalancerProfile {
     #[serde(rename = "outboundIPs", default, skip_serializing_if = "Option::is_none")]
     pub outbound_i_ps: Option<managed_cluster_load_balancer_profile::OutboundIPs>,
     #[doc = "The effective outbound IP resources of the cluster load balancer."]
-    #[serde(rename = "effectiveOutboundIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveOutboundIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_outbound_i_ps: Vec<ResourceReference>,
     #[doc = "The desired number of allocated SNAT ports per VM. Allowed values are in the range of 0 to 64000 (inclusive). The default value is 0 which results in Azure dynamically allocating ports."]
     #[serde(rename = "allocatedOutboundPorts", default, skip_serializing_if = "Option::is_none")]
@@ -2372,7 +2492,12 @@ pub mod managed_cluster_load_balancer_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct OutboundIpPrefixes {
         #[doc = "A list of public IP prefix resources."]
-        #[serde(rename = "publicIPPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "publicIPPrefixes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub public_ip_prefixes: Vec<ResourceReference>,
     }
     impl OutboundIpPrefixes {
@@ -2384,7 +2509,12 @@ pub mod managed_cluster_load_balancer_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct OutboundIPs {
         #[doc = "A list of public IP resources."]
-        #[serde(rename = "publicIPs", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "publicIPs",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub public_i_ps: Vec<ResourceReference>,
     }
     impl OutboundIPs {
@@ -2412,7 +2542,12 @@ pub struct ManagedClusterNatGatewayProfile {
     #[serde(rename = "managedOutboundIPProfile", default, skip_serializing_if = "Option::is_none")]
     pub managed_outbound_ip_profile: Option<ManagedClusterManagedOutboundIpProfile>,
     #[doc = "The effective outbound IP resources of the cluster NAT gateway."]
-    #[serde(rename = "effectiveOutboundIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveOutboundIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_outbound_i_ps: Vec<ResourceReference>,
     #[doc = "Desired outbound flow idle timeout in minutes. Allowed values are in the range of 4 to 120 (inclusive). The default value is 4 minutes."]
     #[serde(rename = "idleTimeoutInMinutes", default, skip_serializing_if = "Option::is_none")]
@@ -2553,10 +2688,20 @@ pub struct ManagedClusterPodIdentityProfile {
     #[serde(rename = "allowNetworkPluginKubenet", default, skip_serializing_if = "Option::is_none")]
     pub allow_network_plugin_kubenet: Option<bool>,
     #[doc = "The pod identities to use in the cluster."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<ManagedClusterPodIdentity>,
     #[doc = "The pod identity exceptions to allow."]
-    #[serde(rename = "userAssignedIdentityExceptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentityExceptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identity_exceptions: Vec<ManagedClusterPodIdentityException>,
 }
 impl ManagedClusterPodIdentityProfile {
@@ -2589,7 +2734,11 @@ pub struct ManagedClusterPodIdentityProvisioningErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ManagedClusterPodIdentityProvisioningErrorBody>,
 }
 impl ManagedClusterPodIdentityProvisioningErrorBody {
@@ -2610,7 +2759,11 @@ pub struct ManagedClusterPoolUpgradeProfile {
     #[serde(rename = "osType")]
     pub os_type: OsType,
     #[doc = "List of orchestrator types and versions available for upgrade."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upgrades: Vec<serde_json::Value>,
 }
 impl ManagedClusterPoolUpgradeProfile {
@@ -2660,7 +2813,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "azurePortalFQDN", default, skip_serializing_if = "Option::is_none")]
     pub azure_portal_fqdn: Option<String>,
     #[doc = "The agent pool properties."]
-    #[serde(rename = "agentPoolProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentPoolProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_pool_profiles: Vec<ManagedClusterAgentPoolProfile>,
     #[doc = "Profile for Linux VMs in the container service cluster."]
     #[serde(rename = "linuxProfile", default, skip_serializing_if = "Option::is_none")]
@@ -2714,7 +2872,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "identityProfile", default, skip_serializing_if = "Option::is_none")]
     pub identity_profile: Option<serde_json::Value>,
     #[doc = "Private link resources associated with the cluster."]
-    #[serde(rename = "privateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_resources: Vec<PrivateLinkResource>,
     #[doc = "If set to true, getting static credentials will be disabled for this cluster. This must only be used on Managed Clusters that are AAD enabled. For more details see [disable local accounts](https://docs.microsoft.com/azure/aks/managed-aad#disable-local-accounts-preview)."]
     #[serde(rename = "disableLocalAccounts", default, skip_serializing_if = "Option::is_none")]
@@ -3110,7 +3273,11 @@ impl ManagedClusterSnapshot {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterSnapshotListResult {
     #[doc = "The list of managed cluster snapshots."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedClusterSnapshot>,
     #[doc = "The URL to get the next set of managed cluster snapshot results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3721,7 +3888,11 @@ impl Default for OsType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationValue>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -3781,7 +3952,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that AKS agent nodes connect to"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -3898,7 +4073,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -3988,7 +4167,12 @@ pub struct PrivateLinkResource {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The RequiredMembers of the resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link service ID of the resource, this field is exposed only to NRP internally."]
     #[serde(rename = "privateLinkServiceID", default, skip_serializing_if = "Option::is_none")]
@@ -4003,7 +4187,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourcesListResult {
@@ -4282,7 +4470,11 @@ impl Snapshot {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotListResult {
     #[doc = "The list of snapshots."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Snapshot>,
     #[doc = "The URL to get the next set of snapshot results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4505,7 +4697,12 @@ pub struct TimeInWeek {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub day: Option<WeekDay>,
     #[doc = "Each integer hour represents a time range beginning at 0m after the hour ending at the next hour (non-inclusive). 0 corresponds to 00:00 UTC, 23 corresponds to 23:00 UTC. Specifying [0, 1] means the 00:00 - 02:00 UTC time range."]
-    #[serde(rename = "hourSlots", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hourSlots",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hour_slots: Vec<HourInDay>,
 }
 impl TimeInWeek {
@@ -4558,7 +4755,11 @@ pub struct TrustedAccessRole {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of rules for the role. This maps to 'rules' property of [Kubernetes Cluster Role](https://kubernetes.io/docs/reference/kubernetes-api/authorization-resources/cluster-role-v1/#ClusterRole)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<TrustedAccessRoleRule>,
 }
 impl TrustedAccessRole {
@@ -4586,7 +4787,11 @@ impl TrustedAccessRoleBinding {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrustedAccessRoleBindingListResult {
     #[doc = "Role binding list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TrustedAccessRoleBinding>,
     #[doc = "Link to next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4672,7 +4877,11 @@ pub mod trusted_access_role_binding_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrustedAccessRoleListResult {
     #[doc = "Role list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TrustedAccessRole>,
     #[doc = "Link to next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4693,19 +4902,42 @@ impl TrustedAccessRoleListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrustedAccessRoleRule {
     #[doc = "List of allowed verbs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub verbs: Vec<String>,
     #[doc = "List of allowed apiGroups"]
-    #[serde(rename = "apiGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_groups: Vec<String>,
     #[doc = "List of allowed resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
     #[doc = "List of allowed names"]
-    #[serde(rename = "resourceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_names: Vec<String>,
     #[doc = "List of allowed nonResourceURLs"]
-    #[serde(rename = "nonResourceURLs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nonResourceURLs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub non_resource_ur_ls: Vec<String>,
 }
 impl TrustedAccessRoleRule {
diff --git a/services/mgmt/containerservice/src/package_preview_2022_07/models.rs b/services/mgmt/containerservice/src/package_preview_2022_07/models.rs
index e0b6da87bd..016ab628e1 100644
--- a/services/mgmt/containerservice/src/package_preview_2022_07/models.rs
+++ b/services/mgmt/containerservice/src/package_preview_2022_07/models.rs
@@ -58,7 +58,12 @@ impl AgentPoolAvailableVersions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentPoolAvailableVersionsProperties {
     #[doc = "List of versions available for agent pool."]
-    #[serde(rename = "agentPoolVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentPoolVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_pool_versions: Vec<serde_json::Value>,
 }
 impl AgentPoolAvailableVersionsProperties {
@@ -70,7 +75,11 @@ impl AgentPoolAvailableVersionsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentPoolListResult {
     #[doc = "The list of agent pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AgentPool>,
     #[doc = "The URL to get the next set of agent pool results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -196,7 +205,11 @@ pub struct AgentPoolUpgradeProfileProperties {
     #[serde(rename = "osType")]
     pub os_type: OsType,
     #[doc = "List of orchestrator types and versions available for upgrade."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upgrades: Vec<serde_json::Value>,
     #[doc = "The latest AKS supported node image version."]
     #[serde(rename = "latestNodeImageVersion", default, skip_serializing_if = "Option::is_none")]
@@ -336,7 +349,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -485,13 +502,28 @@ pub struct ContainerServiceNetworkProfile {
     #[serde(rename = "natGatewayProfile", default, skip_serializing_if = "Option::is_none")]
     pub nat_gateway_profile: Option<ManagedClusterNatGatewayProfile>,
     #[doc = "One IPv4 CIDR is expected for single-stack networking. Two CIDRs, one for each IP family (IPv4/IPv6), is expected for dual-stack networking."]
-    #[serde(rename = "podCidrs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "podCidrs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pod_cidrs: Vec<String>,
     #[doc = "One IPv4 CIDR is expected for single-stack networking. Two CIDRs, one for each IP family (IPv4/IPv6), is expected for dual-stack networking. They must not overlap with any Subnet IP ranges."]
-    #[serde(rename = "serviceCidrs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceCidrs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_cidrs: Vec<String>,
     #[doc = "IP families are used to determine single-stack or dual-stack clusters. For single-stack, the expected value is IPv4. For dual-stack, the expected values are IPv4 and IPv6."]
-    #[serde(rename = "ipFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_families: Vec<String>,
 }
 impl ContainerServiceNetworkProfile {
@@ -1218,7 +1250,11 @@ impl CredentialResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CredentialResults {
     #[doc = "Base64-encoded Kubernetes configuration file."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kubeconfigs: Vec<CredentialResult>,
 }
 impl CredentialResults {
@@ -1233,7 +1269,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The Ports and Protocols used when connecting to domainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -1290,10 +1331,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -1409,7 +1459,11 @@ impl FleetCredentialResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FleetCredentialResults {
     #[doc = "Base64-encoded Kubernetes configuration file."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kubeconfigs: Vec<FleetCredentialResult>,
 }
 impl FleetCredentialResults {
@@ -1439,7 +1493,11 @@ impl FleetHubProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FleetListResult {
     #[doc = "The list of Fleets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Fleet>,
     #[doc = "The URL to get the next page of Fleets."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1537,7 +1595,11 @@ pub mod fleet_member_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FleetMembersListResult {
     #[doc = "The list of members in a given Fleet."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FleetMember>,
     #[doc = "The URL to get the next page of Fleet members."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1700,7 +1762,12 @@ pub struct KubeletConfig {
     #[serde(rename = "topologyManagerPolicy", default, skip_serializing_if = "Option::is_none")]
     pub topology_manager_policy: Option<String>,
     #[doc = "Allowed list of unsafe sysctls or unsafe sysctl patterns (ending in `*`)."]
-    #[serde(rename = "allowedUnsafeSysctls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedUnsafeSysctls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_unsafe_sysctls: Vec<String>,
     #[doc = "If set to true it will make the Kubelet fail to start if swap is enabled on the node."]
     #[serde(rename = "failSwapOn", default, skip_serializing_if = "Option::is_none")]
@@ -1839,7 +1906,11 @@ impl MaintenanceConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MaintenanceConfigurationListResult {
     #[doc = "The list of maintenance configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MaintenanceConfiguration>,
     #[doc = "The URL to get the next set of maintenance configuration results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1860,10 +1931,20 @@ impl MaintenanceConfigurationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MaintenanceConfigurationProperties {
     #[doc = "If two array entries specify the same day of the week, the applied configuration is the union of times in both entries."]
-    #[serde(rename = "timeInWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeInWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_in_week: Vec<TimeInWeek>,
     #[doc = "Time slots on which upgrade is not allowed."]
-    #[serde(rename = "notAllowedTime", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notAllowedTime",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_allowed_time: Vec<TimeSpan>,
 }
 impl MaintenanceConfigurationProperties {
@@ -1910,7 +1991,12 @@ pub struct ManagedClusterAadProfile {
     #[serde(rename = "enableAzureRBAC", default, skip_serializing_if = "Option::is_none")]
     pub enable_azure_rbac: Option<bool>,
     #[doc = "The list of AAD group object IDs that will have admin role of the cluster."]
-    #[serde(rename = "adminGroupObjectIDs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "adminGroupObjectIDs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub admin_group_object_i_ds: Vec<String>,
     #[doc = "The client AAD application ID."]
     #[serde(rename = "clientAppID", default, skip_serializing_if = "Option::is_none")]
@@ -1934,7 +2020,12 @@ impl ManagedClusterAadProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterApiServerAccessProfile {
     #[doc = "IP ranges are specified in CIDR format, e.g. 137.117.106.88/29. This feature is not compatible with clusters that use Public IP Per Node, or clusters that are using a Basic Load Balancer. For more information see [API server authorized IP ranges](https://docs.microsoft.com/azure/aks/api-server-authorized-ip-ranges)."]
-    #[serde(rename = "authorizedIPRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizedIPRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorized_ip_ranges: Vec<String>,
     #[doc = "For more details, see [Creating a private AKS cluster](https://docs.microsoft.com/azure/aks/private-clusters)."]
     #[serde(rename = "enablePrivateCluster", default, skip_serializing_if = "Option::is_none")]
@@ -2090,7 +2181,12 @@ pub struct ManagedClusterAgentPoolProfileProperties {
     #[serde(rename = "powerState", default, skip_serializing_if = "Option::is_none")]
     pub power_state: Option<PowerState>,
     #[doc = "The list of Availability zones to use for nodes. This can only be specified if the AgentPoolType property is 'VirtualMachineScaleSets'."]
-    #[serde(rename = "availabilityZones", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilityZones",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_zones: Vec<String>,
     #[doc = "Some scenarios may require nodes in a node pool to receive their own dedicated public IP addresses. A common scenario is for gaming workloads, where a console needs to make a direct connection to a cloud virtual machine to minimize hops. For more information see [assigning a public IP per node](https://docs.microsoft.com/azure/aks/use-multiple-node-pools#assign-a-public-ip-per-node-for-your-node-pools). The default is false."]
     #[serde(rename = "enableNodePublicIP", default, skip_serializing_if = "Option::is_none")]
@@ -2117,7 +2213,12 @@ pub struct ManagedClusterAgentPoolProfileProperties {
     #[serde(rename = "nodeLabels", default, skip_serializing_if = "Option::is_none")]
     pub node_labels: Option<serde_json::Value>,
     #[doc = "The taints added to new nodes during node pool create and scale. For example, key=value:NoSchedule."]
-    #[serde(rename = "nodeTaints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nodeTaints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_taints: Vec<String>,
     #[doc = "The ID for Proximity Placement Group."]
     #[serde(rename = "proximityPlacementGroupID", default, skip_serializing_if = "Option::is_none")]
@@ -2272,10 +2373,20 @@ pub struct ManagedClusterHttpProxyConfig {
     #[serde(rename = "httpsProxy", default, skip_serializing_if = "Option::is_none")]
     pub https_proxy: Option<String>,
     #[doc = "The endpoints that should not go through proxy."]
-    #[serde(rename = "noProxy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "noProxy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub no_proxy: Vec<String>,
     #[doc = "A read-only list of all endpoints for which traffic should not be sent to the proxy. This list is a superset of noProxy and values injected by AKS."]
-    #[serde(rename = "effectiveNoProxy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveNoProxy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_no_proxy: Vec<String>,
     #[doc = "Alternative CA cert to use for connecting to proxy servers."]
     #[serde(rename = "trustedCa", default, skip_serializing_if = "Option::is_none")]
@@ -2348,7 +2459,11 @@ impl ManagedClusterIngressProfileWebAppRouting {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterListResult {
     #[doc = "The list of managed clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedCluster>,
     #[doc = "The URL to get the next set of managed cluster results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2378,7 +2493,12 @@ pub struct ManagedClusterLoadBalancerProfile {
     #[serde(rename = "outboundIPs", default, skip_serializing_if = "Option::is_none")]
     pub outbound_i_ps: Option<managed_cluster_load_balancer_profile::OutboundIPs>,
     #[doc = "The effective outbound IP resources of the cluster load balancer."]
-    #[serde(rename = "effectiveOutboundIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveOutboundIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_outbound_i_ps: Vec<ResourceReference>,
     #[doc = "The desired number of allocated SNAT ports per VM. Allowed values are in the range of 0 to 64000 (inclusive). The default value is 0 which results in Azure dynamically allocating ports."]
     #[serde(rename = "allocatedOutboundPorts", default, skip_serializing_if = "Option::is_none")]
@@ -2416,7 +2536,12 @@ pub mod managed_cluster_load_balancer_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct OutboundIpPrefixes {
         #[doc = "A list of public IP prefix resources."]
-        #[serde(rename = "publicIPPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "publicIPPrefixes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub public_ip_prefixes: Vec<ResourceReference>,
     }
     impl OutboundIpPrefixes {
@@ -2428,7 +2553,12 @@ pub mod managed_cluster_load_balancer_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct OutboundIPs {
         #[doc = "A list of public IP resources."]
-        #[serde(rename = "publicIPs", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "publicIPs",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub public_i_ps: Vec<ResourceReference>,
     }
     impl OutboundIPs {
@@ -2456,7 +2586,12 @@ pub struct ManagedClusterNatGatewayProfile {
     #[serde(rename = "managedOutboundIPProfile", default, skip_serializing_if = "Option::is_none")]
     pub managed_outbound_ip_profile: Option<ManagedClusterManagedOutboundIpProfile>,
     #[doc = "The effective outbound IP resources of the cluster NAT gateway."]
-    #[serde(rename = "effectiveOutboundIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveOutboundIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_outbound_i_ps: Vec<ResourceReference>,
     #[doc = "Desired outbound flow idle timeout in minutes. Allowed values are in the range of 4 to 120 (inclusive). The default value is 4 minutes."]
     #[serde(rename = "idleTimeoutInMinutes", default, skip_serializing_if = "Option::is_none")]
@@ -2597,10 +2732,20 @@ pub struct ManagedClusterPodIdentityProfile {
     #[serde(rename = "allowNetworkPluginKubenet", default, skip_serializing_if = "Option::is_none")]
     pub allow_network_plugin_kubenet: Option<bool>,
     #[doc = "The pod identities to use in the cluster."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<ManagedClusterPodIdentity>,
     #[doc = "The pod identity exceptions to allow."]
-    #[serde(rename = "userAssignedIdentityExceptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentityExceptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identity_exceptions: Vec<ManagedClusterPodIdentityException>,
 }
 impl ManagedClusterPodIdentityProfile {
@@ -2633,7 +2778,11 @@ pub struct ManagedClusterPodIdentityProvisioningErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ManagedClusterPodIdentityProvisioningErrorBody>,
 }
 impl ManagedClusterPodIdentityProvisioningErrorBody {
@@ -2654,7 +2803,11 @@ pub struct ManagedClusterPoolUpgradeProfile {
     #[serde(rename = "osType")]
     pub os_type: OsType,
     #[doc = "List of orchestrator types and versions available for upgrade."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upgrades: Vec<serde_json::Value>,
 }
 impl ManagedClusterPoolUpgradeProfile {
@@ -2704,7 +2857,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "azurePortalFQDN", default, skip_serializing_if = "Option::is_none")]
     pub azure_portal_fqdn: Option<String>,
     #[doc = "The agent pool properties."]
-    #[serde(rename = "agentPoolProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentPoolProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_pool_profiles: Vec<ManagedClusterAgentPoolProfile>,
     #[doc = "Profile for Linux VMs in the container service cluster."]
     #[serde(rename = "linuxProfile", default, skip_serializing_if = "Option::is_none")]
@@ -2758,7 +2916,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "identityProfile", default, skip_serializing_if = "Option::is_none")]
     pub identity_profile: Option<serde_json::Value>,
     #[doc = "Private link resources associated with the cluster."]
-    #[serde(rename = "privateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_resources: Vec<PrivateLinkResource>,
     #[doc = "If set to true, getting static credentials will be disabled for this cluster. This must only be used on Managed Clusters that are AAD enabled. For more details see [disable local accounts](https://docs.microsoft.com/azure/aks/managed-aad#disable-local-accounts-preview)."]
     #[serde(rename = "disableLocalAccounts", default, skip_serializing_if = "Option::is_none")]
@@ -3177,7 +3340,11 @@ impl ManagedClusterSnapshot {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterSnapshotListResult {
     #[doc = "The list of managed cluster snapshots."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedClusterSnapshot>,
     #[doc = "The URL to get the next set of managed cluster snapshot results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3905,7 +4072,11 @@ impl Default for OsType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationValue>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -3965,7 +4136,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that AKS agent nodes connect to"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -4082,7 +4257,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -4172,7 +4351,12 @@ pub struct PrivateLinkResource {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The RequiredMembers of the resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link service ID of the resource, this field is exposed only to NRP internally."]
     #[serde(rename = "privateLinkServiceID", default, skip_serializing_if = "Option::is_none")]
@@ -4187,7 +4371,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourcesListResult {
@@ -4466,7 +4654,11 @@ impl Snapshot {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotListResult {
     #[doc = "The list of snapshots."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Snapshot>,
     #[doc = "The URL to get the next set of snapshot results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4689,7 +4881,12 @@ pub struct TimeInWeek {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub day: Option<WeekDay>,
     #[doc = "Each integer hour represents a time range beginning at 0m after the hour ending at the next hour (non-inclusive). 0 corresponds to 00:00 UTC, 23 corresponds to 23:00 UTC. Specifying [0, 1] means the 00:00 - 02:00 UTC time range."]
-    #[serde(rename = "hourSlots", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hourSlots",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hour_slots: Vec<HourInDay>,
 }
 impl TimeInWeek {
@@ -4742,7 +4939,11 @@ pub struct TrustedAccessRole {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of rules for the role. This maps to 'rules' property of [Kubernetes Cluster Role](https://kubernetes.io/docs/reference/kubernetes-api/authorization-resources/cluster-role-v1/#ClusterRole)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<TrustedAccessRoleRule>,
 }
 impl TrustedAccessRole {
@@ -4770,7 +4971,11 @@ impl TrustedAccessRoleBinding {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrustedAccessRoleBindingListResult {
     #[doc = "Role binding list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TrustedAccessRoleBinding>,
     #[doc = "Link to next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4856,7 +5061,11 @@ pub mod trusted_access_role_binding_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrustedAccessRoleListResult {
     #[doc = "Role list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TrustedAccessRole>,
     #[doc = "Link to next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4877,19 +5086,42 @@ impl TrustedAccessRoleListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrustedAccessRoleRule {
     #[doc = "List of allowed verbs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub verbs: Vec<String>,
     #[doc = "List of allowed apiGroups"]
-    #[serde(rename = "apiGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_groups: Vec<String>,
     #[doc = "List of allowed resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
     #[doc = "List of allowed names"]
-    #[serde(rename = "resourceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_names: Vec<String>,
     #[doc = "List of allowed nonResourceURLs"]
-    #[serde(rename = "nonResourceURLs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nonResourceURLs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub non_resource_ur_ls: Vec<String>,
 }
 impl TrustedAccessRoleRule {
diff --git a/services/mgmt/cosmosdb/src/package_preview_2021_04/models.rs b/services/mgmt/cosmosdb/src/package_preview_2021_04/models.rs
index 4e94bf0708..42f4f53998 100644
--- a/services/mgmt/cosmosdb/src/package_preview_2021_04/models.rs
+++ b/services/mgmt/cosmosdb/src/package_preview_2021_04/models.rs
@@ -395,7 +395,11 @@ impl CassandraKeyspaceGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraKeyspaceListResult {
     #[doc = "List of Cassandra keyspaces and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CassandraKeyspaceGetResults>,
 }
 impl azure_core::Continuable for CassandraKeyspaceListResult {
@@ -436,13 +440,27 @@ impl CassandraPartitionKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraSchema {
     #[doc = "List of Cassandra table columns."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<Column>,
     #[doc = "List of partition key."]
-    #[serde(rename = "partitionKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_keys: Vec<CassandraPartitionKey>,
     #[doc = "List of cluster key."]
-    #[serde(rename = "clusterKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_keys: Vec<ClusterKey>,
 }
 impl CassandraSchema {
@@ -511,7 +529,11 @@ impl CassandraTableGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraTableListResult {
     #[doc = "List of Cassandra tables and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CassandraTableGetResults>,
 }
 impl azure_core::Continuable for CassandraTableListResult {
@@ -598,7 +620,11 @@ impl ClusterKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterNodeStatus {
     #[doc = "Information about nodes in the cluster (corresponds to what is returned from nodetool info)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<serde_json::Value>,
 }
 impl ClusterNodeStatus {
@@ -655,19 +681,44 @@ pub mod cluster_resource {
         #[serde(rename = "repairEnabled", default, skip_serializing_if = "Option::is_none")]
         pub repair_enabled: Option<bool>,
         #[doc = "List of TLS certificates used to authorize clients connecting to the cluster. All connections are TLS encrypted whether clientCertificates is set or not, but if clientCertificates is set, the managed Cassandra cluster will reject all connections not bearing a TLS client certificate that can be validated from one or more of the public certificates in this property."]
-        #[serde(rename = "clientCertificates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "clientCertificates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub client_certificates: Vec<Certificate>,
         #[doc = "List of TLS certificates used to authorize gossip from unmanaged data centers. The TLS certificates of all nodes in unmanaged data centers must be verifiable using one of the certificates provided in this property."]
-        #[serde(rename = "externalGossipCertificates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "externalGossipCertificates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub external_gossip_certificates: Vec<Certificate>,
         #[doc = "List of TLS certificates that unmanaged nodes must trust for gossip with managed nodes. All managed nodes will present TLS client certificates that are verifiable using one of the certificates provided in this property."]
-        #[serde(rename = "gossipCertificates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "gossipCertificates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub gossip_certificates: Vec<Certificate>,
         #[doc = "List of IP addresses of seed nodes in unmanaged data centers. These will be added to the seed node lists of all managed nodes."]
-        #[serde(rename = "externalSeedNodes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "externalSeedNodes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub external_seed_nodes: Vec<SeedNode>,
         #[doc = "List of IP addresses of seed nodes in the managed data centers. These should be added to the seed node lists of all unmanaged nodes."]
-        #[serde(rename = "seedNodes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "seedNodes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub seed_nodes: Vec<SeedNode>,
     }
     impl Properties {
@@ -925,7 +976,11 @@ pub mod consistency_policy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerPartitionKey {
     #[doc = "List of paths using which data within the container can be partitioned"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<Path>,
     #[doc = "Indicates the kind of algorithm used for partitioning. For MultiHash, multiple partition keys (upto three maximum) are supported for container create"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1142,7 +1197,12 @@ pub mod data_center_resource {
         #[serde(rename = "nodeCount", default, skip_serializing_if = "Option::is_none")]
         pub node_count: Option<i32>,
         #[doc = "IP addresses for seed nodes in this data center. This is for reference. Generally you will want to use the seedNodes property on the cluster, which aggregates the seed nodes from all data centers in the cluster."]
-        #[serde(rename = "seedNodes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "seedNodes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub seed_nodes: Vec<SeedNode>,
         #[doc = "A fragment of a cassandra.yaml configuration file to be included in the cassandra.yaml for all nodes in this data center. The fragment should be Base64 encoded, and only a subset of keys are allowed."]
         #[serde(rename = "base64EncodedCassandraYamlFragment", default, skip_serializing_if = "Option::is_none")]
@@ -1259,10 +1319,19 @@ pub struct DatabaseAccountCreateUpdateProperties {
     #[serde(rename = "enableAutomaticFailover", default, skip_serializing_if = "Option::is_none")]
     pub enable_automatic_failover: Option<bool>,
     #[doc = "List of Cosmos DB capabilities for the account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
     #[doc = "List of Virtual Network ACL rules configured for the Cosmos DB account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "Enables the account to write in multiple locations"]
     #[serde(rename = "enableMultipleWriteLocations", default, skip_serializing_if = "Option::is_none")]
@@ -1300,13 +1369,22 @@ pub struct DatabaseAccountCreateUpdateProperties {
     #[serde(rename = "backupPolicy", default, skip_serializing_if = "Option::is_none")]
     pub backup_policy: Option<BackupPolicy>,
     #[doc = "The CORS policy for the Cosmos DB database account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors: Vec<CorsPolicy>,
     #[doc = "Indicates what services are allowed to bypass firewall checks."]
     #[serde(rename = "networkAclBypass", default, skip_serializing_if = "Option::is_none")]
     pub network_acl_bypass: Option<NetworkAclBypass>,
     #[doc = "An array that contains the Resource Ids for Network Acl Bypass for the Cosmos DB account."]
-    #[serde(rename = "networkAclBypassResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAclBypassResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_acl_bypass_resource_ids: Vec<String>,
 }
 impl DatabaseAccountCreateUpdateProperties {
@@ -1363,25 +1441,58 @@ pub struct DatabaseAccountGetProperties {
     #[serde(rename = "consistencyPolicy", default, skip_serializing_if = "Option::is_none")]
     pub consistency_policy: Option<ConsistencyPolicy>,
     #[doc = "List of Cosmos DB capabilities for the account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
     #[doc = "An array that contains the write location for the Cosmos DB account."]
-    #[serde(rename = "writeLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "writeLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub write_locations: Vec<Location>,
     #[doc = "An array that contains of the read locations enabled for the Cosmos DB account."]
-    #[serde(rename = "readLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "readLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub read_locations: Vec<Location>,
     #[doc = "An array that contains all of the locations enabled for the Cosmos DB account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<Location>,
     #[doc = "An array that contains the regions ordered by their failover priorities."]
-    #[serde(rename = "failoverPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "failoverPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub failover_policies: Vec<FailoverPolicy>,
     #[doc = "List of Virtual Network ACL rules configured for the Cosmos DB account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "List of Private Endpoint Connections configured for the Cosmos DB account."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Enables the account to write in multiple locations"]
     #[serde(rename = "enableMultipleWriteLocations", default, skip_serializing_if = "Option::is_none")]
@@ -1425,13 +1536,22 @@ pub struct DatabaseAccountGetProperties {
     #[serde(rename = "backupPolicy", default, skip_serializing_if = "Option::is_none")]
     pub backup_policy: Option<BackupPolicy>,
     #[doc = "The CORS policy for the Cosmos DB database account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors: Vec<CorsPolicy>,
     #[doc = "Indicates what services are allowed to bypass firewall checks."]
     #[serde(rename = "networkAclBypass", default, skip_serializing_if = "Option::is_none")]
     pub network_acl_bypass: Option<NetworkAclBypass>,
     #[doc = "An array that contains the Resource Ids for Network Acl Bypass for the Cosmos DB account."]
-    #[serde(rename = "networkAclBypassResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAclBypassResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_acl_bypass_resource_ids: Vec<String>,
 }
 impl DatabaseAccountGetProperties {
@@ -1512,7 +1632,12 @@ pub mod database_account_get_results {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseAccountListConnectionStringsResult {
     #[doc = "An array that contains the connection strings for the Cosmos DB account."]
-    #[serde(rename = "connectionStrings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionStrings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_strings: Vec<DatabaseAccountConnectionString>,
 }
 impl DatabaseAccountListConnectionStringsResult {
@@ -1645,7 +1770,11 @@ pub struct DatabaseAccountUpdateProperties {
     #[serde(rename = "consistencyPolicy", default, skip_serializing_if = "Option::is_none")]
     pub consistency_policy: Option<ConsistencyPolicy>,
     #[doc = "An array that contains the georeplication locations enabled for the Cosmos DB account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<Location>,
     #[doc = "Array of IpAddressOrRange objects."]
     #[serde(rename = "ipRules", default, skip_serializing_if = "Option::is_none")]
@@ -1657,10 +1786,19 @@ pub struct DatabaseAccountUpdateProperties {
     #[serde(rename = "enableAutomaticFailover", default, skip_serializing_if = "Option::is_none")]
     pub enable_automatic_failover: Option<bool>,
     #[doc = "List of Cosmos DB capabilities for the account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
     #[doc = "List of Virtual Network ACL rules configured for the Cosmos DB account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "Enables the account to write in multiple locations"]
     #[serde(rename = "enableMultipleWriteLocations", default, skip_serializing_if = "Option::is_none")]
@@ -1695,13 +1833,22 @@ pub struct DatabaseAccountUpdateProperties {
     #[serde(rename = "backupPolicy", default, skip_serializing_if = "Option::is_none")]
     pub backup_policy: Option<BackupPolicy>,
     #[doc = "The CORS policy for the Cosmos DB database account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors: Vec<CorsPolicy>,
     #[doc = "Indicates what services are allowed to bypass firewall checks."]
     #[serde(rename = "networkAclBypass", default, skip_serializing_if = "Option::is_none")]
     pub network_acl_bypass: Option<NetworkAclBypass>,
     #[doc = "An array that contains the Resource Ids for Network Acl Bypass for the Cosmos DB account."]
-    #[serde(rename = "networkAclBypassResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAclBypassResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_acl_bypass_resource_ids: Vec<String>,
 }
 impl DatabaseAccountUpdateProperties {
@@ -1713,7 +1860,11 @@ impl DatabaseAccountUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseAccountsListResult {
     #[doc = "List of database account and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseAccountGetResults>,
 }
 impl azure_core::Continuable for DatabaseAccountsListResult {
@@ -1734,7 +1885,12 @@ pub struct DatabaseRestoreResource {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "The names of the collections available for restore."]
-    #[serde(rename = "collectionNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectionNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collection_names: Vec<CollectionName>,
 }
 impl DatabaseRestoreResource {
@@ -1896,7 +2052,11 @@ impl GremlinDatabaseGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GremlinDatabaseListResult {
     #[doc = "List of Gremlin databases and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GremlinDatabaseGetResults>,
 }
 impl azure_core::Continuable for GremlinDatabaseListResult {
@@ -1982,7 +2142,11 @@ impl GremlinGraphGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GremlinGraphListResult {
     #[doc = "List of graphs and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GremlinGraphGetResults>,
 }
 impl azure_core::Continuable for GremlinGraphListResult {
@@ -2037,7 +2201,11 @@ pub struct IncludedPath {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "List of indexes for this path"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub indexes: Vec<Indexes>,
 }
 impl IncludedPath {
@@ -2170,16 +2338,36 @@ pub struct IndexingPolicy {
     #[serde(rename = "indexingMode", default, skip_serializing_if = "Option::is_none")]
     pub indexing_mode: Option<indexing_policy::IndexingMode>,
     #[doc = "List of paths to include in the indexing"]
-    #[serde(rename = "includedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_paths: Vec<IncludedPath>,
     #[doc = "List of paths to exclude from indexing"]
-    #[serde(rename = "excludedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_paths: Vec<ExcludedPath>,
     #[doc = "List of composite path list"]
-    #[serde(rename = "compositeIndexes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "compositeIndexes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub composite_indexes: Vec<CompositePathList>,
     #[doc = "List of spatial specifics"]
-    #[serde(rename = "spatialIndexes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "spatialIndexes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub spatial_indexes: Vec<SpatialSpec>,
 }
 impl IndexingPolicy {
@@ -2254,7 +2442,11 @@ pub type Key = String;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListBackups {
     #[doc = "Container for array of backups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupResource>,
 }
 impl azure_core::Continuable for ListBackups {
@@ -2272,7 +2464,11 @@ impl ListBackups {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListClusters {
     #[doc = "Container for the array of clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClusterResource>,
 }
 impl azure_core::Continuable for ListClusters {
@@ -2290,7 +2486,11 @@ impl ListClusters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListDataCenters {
     #[doc = "Container for array of data centers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataCenterResource>,
 }
 impl azure_core::Continuable for ListDataCenters {
@@ -2349,7 +2549,11 @@ impl LocationGetResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocationListResult {
     #[doc = "List of Cosmos DB locations and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LocationGetResult>,
 }
 impl azure_core::Continuable for LocationListResult {
@@ -2376,7 +2580,12 @@ pub struct LocationProperties {
     #[serde(rename = "isResidencyRestricted", default, skip_serializing_if = "Option::is_none")]
     pub is_residency_restricted: Option<bool>,
     #[doc = "The properties of available backup storage redundancies."]
-    #[serde(rename = "backupStorageRedundancies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupStorageRedundancies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_storage_redundancies: Vec<BackupStorageRedundancy>,
 }
 impl LocationProperties {
@@ -2481,7 +2690,12 @@ pub struct Metric {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<MetricName>,
     #[doc = "The metric values for the specified time window and timestep."]
-    #[serde(rename = "metricValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_values: Vec<MetricValue>,
 }
 impl Metric {
@@ -2508,7 +2722,12 @@ impl MetricAvailability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricDefinition {
     #[doc = "The list of metric availabilities for the account."]
-    #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricAvailabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_availabilities: Vec<MetricAvailability>,
     #[doc = "The primary aggregation type of the metric."]
     #[serde(rename = "primaryAggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -2580,7 +2799,11 @@ pub mod metric_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricDefinitionsListResult {
     #[doc = "The list of metric definitions for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetricDefinition>,
 }
 impl azure_core::Continuable for MetricDefinitionsListResult {
@@ -2598,7 +2821,11 @@ impl MetricDefinitionsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricListResult {
     #[doc = "The list of metrics for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Metric>,
 }
 impl azure_core::Continuable for MetricListResult {
@@ -2715,7 +2942,11 @@ impl MongoDbCollectionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoDbCollectionListResult {
     #[doc = "List of MongoDB collections and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoDbCollectionGetResults>,
 }
 impl azure_core::Continuable for MongoDbCollectionListResult {
@@ -2738,7 +2969,11 @@ pub struct MongoDbCollectionResource {
     #[serde(rename = "shardKey", default, skip_serializing_if = "Option::is_none")]
     pub shard_key: Option<ShardKeys>,
     #[doc = "List of index keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub indexes: Vec<MongoIndex>,
     #[doc = "Analytical TTL."]
     #[serde(rename = "analyticalStorageTtl", default, skip_serializing_if = "Option::is_none")]
@@ -2815,7 +3050,11 @@ impl MongoDbDatabaseGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoDbDatabaseListResult {
     #[doc = "List of MongoDB databases and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoDbDatabaseGetResults>,
 }
 impl azure_core::Continuable for MongoDbDatabaseListResult {
@@ -2859,7 +3098,11 @@ impl MongoIndex {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoIndexKeys {
     #[doc = "List of keys for each MongoDB collection in the Azure Cosmos DB service"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<Key>,
 }
 impl MongoIndexKeys {
@@ -2932,7 +3175,11 @@ impl NotebookWorkspaceCreateUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotebookWorkspaceListResult {
     #[doc = "Array of notebook workspace resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotebookWorkspace>,
 }
 impl azure_core::Continuable for NotebookWorkspaceListResult {
@@ -3004,7 +3251,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Resource Provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3097,7 +3348,11 @@ impl PartitionMetric {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartitionMetricListResult {
     #[doc = "The list of partition-level metrics for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartitionMetric>,
 }
 impl azure_core::Continuable for PartitionMetricListResult {
@@ -3132,7 +3387,11 @@ impl PartitionUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartitionUsagesResult {
     #[doc = "The list of partition-level usages for the database. A usage is a point in time metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartitionUsage>,
 }
 impl azure_core::Continuable for PartitionUsagesResult {
@@ -3166,7 +3425,12 @@ pub struct PercentileMetric {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<MetricName>,
     #[doc = "The percentile metric values for the specified time window and timestep."]
-    #[serde(rename = "metricValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_values: Vec<PercentileMetricValue>,
 }
 impl PercentileMetric {
@@ -3178,7 +3442,11 @@ impl PercentileMetric {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PercentileMetricListResult {
     #[doc = "The list of percentile metrics for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PercentileMetric>,
 }
 impl azure_core::Continuable for PercentileMetricListResult {
@@ -3263,10 +3531,20 @@ impl PeriodicModeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permission {
     #[doc = "An array of data actions that are allowed."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<String>,
     #[doc = "An array of data actions that are denied."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<String>,
 }
 impl Permission {
@@ -3292,7 +3570,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -3357,7 +3639,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -3378,10 +3664,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource required zone names."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -3473,7 +3769,11 @@ pub struct RepairPostBody {
     #[doc = "The name of the keyspace that repair should be run on."]
     pub keyspace: String,
     #[doc = "List of tables in the keyspace to repair. If omitted, repair all tables in the keyspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<String>,
 }
 impl RepairPostBody {
@@ -3542,7 +3842,12 @@ pub struct RestorableDatabaseAccountProperties {
     #[serde(rename = "apiType", default, skip_serializing_if = "Option::is_none")]
     pub api_type: Option<ApiType>,
     #[doc = "List of regions where the of the database account can be restored from."]
-    #[serde(rename = "restorableLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restorableLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restorable_locations: Vec<RestorableLocationResource>,
 }
 impl RestorableDatabaseAccountProperties {
@@ -3554,7 +3859,11 @@ impl RestorableDatabaseAccountProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableDatabaseAccountsListResult {
     #[doc = "List of restorable database accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableDatabaseAccountGetResult>,
 }
 impl azure_core::Continuable for RestorableDatabaseAccountsListResult {
@@ -3653,7 +3962,11 @@ pub mod restorable_mongodb_collection_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableMongodbCollectionsListResult {
     #[doc = "List of MongoDB collection events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableMongodbCollectionGetResult>,
 }
 impl azure_core::Continuable for RestorableMongodbCollectionsListResult {
@@ -3731,7 +4044,11 @@ pub mod restorable_mongodb_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableMongodbDatabasesListResult {
     #[doc = "List of MongoDB database events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableMongodbDatabaseGetResult>,
 }
 impl azure_core::Continuable for RestorableMongodbDatabasesListResult {
@@ -3749,7 +4066,11 @@ impl RestorableMongodbDatabasesListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableMongodbResourcesListResult {
     #[doc = "List of restorable MongoDB resources, including the database and collection names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseRestoreResource>,
 }
 impl azure_core::Continuable for RestorableMongodbResourcesListResult {
@@ -3853,7 +4174,11 @@ pub mod restorable_sql_container_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableSqlContainersListResult {
     #[doc = "List of SQL container events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableSqlContainerGetResult>,
 }
 impl azure_core::Continuable for RestorableSqlContainersListResult {
@@ -3965,7 +4290,11 @@ pub mod restorable_sql_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableSqlDatabasesListResult {
     #[doc = "List of SQL database events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableSqlDatabaseGetResult>,
 }
 impl azure_core::Continuable for RestorableSqlDatabasesListResult {
@@ -3983,7 +4312,11 @@ impl RestorableSqlDatabasesListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableSqlResourcesListResult {
     #[doc = "List of restorable SQL resources, including the database and collection names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseRestoreResource>,
 }
 impl azure_core::Continuable for RestorableSqlResourcesListResult {
@@ -4010,7 +4343,12 @@ pub struct RestoreParameters {
     #[serde(rename = "restoreTimestampInUtc", default, with = "azure_core::date::rfc3339::option")]
     pub restore_timestamp_in_utc: Option<time::OffsetDateTime>,
     #[doc = "List of specific databases available for restore."]
-    #[serde(rename = "databasesToRestore", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databasesToRestore",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases_to_restore: Vec<DatabaseRestoreResource>,
 }
 impl RestoreParameters {
@@ -4098,7 +4436,11 @@ pub struct SpatialSpec {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "List of path's spatial type"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub types: Vec<SpatialType>,
 }
 impl SpatialSpec {
@@ -4208,7 +4550,11 @@ impl SqlContainerGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlContainerListResult {
     #[doc = "List of containers and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlContainerGetResults>,
 }
 impl azure_core::Continuable for SqlContainerListResult {
@@ -4346,7 +4692,11 @@ impl SqlDatabaseGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlDatabaseListResult {
     #[doc = "List of SQL databases and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlDatabaseGetResults>,
 }
 impl azure_core::Continuable for SqlDatabaseListResult {
@@ -4401,7 +4751,11 @@ impl SqlRoleAssignmentGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlRoleAssignmentListResult {
     #[doc = "List of Role Assignments and their properties"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlRoleAssignmentGetResults>,
 }
 impl azure_core::Continuable for SqlRoleAssignmentListResult {
@@ -4463,7 +4817,11 @@ impl SqlRoleDefinitionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlRoleDefinitionListResult {
     #[doc = "List of Role Definitions and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlRoleDefinitionGetResults>,
 }
 impl azure_core::Continuable for SqlRoleDefinitionListResult {
@@ -4487,10 +4845,19 @@ pub struct SqlRoleDefinitionResource {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<sql_role_definition_resource::Type>,
     #[doc = "A set of fully qualified Scopes at or below which Role Assignments may be created using this Role Definition. This will allow application of this Role Definition on the entire database account or any underlying Database / Collection. Must have at least one element. Scopes higher than Database account are not enforceable as assignable Scopes. Note that resources referenced in assignable Scopes need not exist."]
-    #[serde(rename = "assignableScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assignableScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assignable_scopes: Vec<String>,
     #[doc = "The set of operations allowed through this Role Definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<Permission>,
 }
 impl SqlRoleDefinitionResource {
@@ -4566,7 +4933,11 @@ impl SqlStoredProcedureGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlStoredProcedureListResult {
     #[doc = "List of storedProcedures and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlStoredProcedureGetResults>,
 }
 impl azure_core::Continuable for SqlStoredProcedureListResult {
@@ -4653,7 +5024,11 @@ impl SqlTriggerGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlTriggerListResult {
     #[doc = "List of triggers and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlTriggerGetResults>,
 }
 impl azure_core::Continuable for SqlTriggerListResult {
@@ -4834,7 +5209,11 @@ impl SqlUserDefinedFunctionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlUserDefinedFunctionListResult {
     #[doc = "List of userDefinedFunctions and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlUserDefinedFunctionGetResults>,
 }
 impl azure_core::Continuable for SqlUserDefinedFunctionListResult {
@@ -4923,7 +5302,11 @@ impl TableGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TableListResult {
     #[doc = "List of Table and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TableGetResults>,
 }
 impl azure_core::Continuable for TableListResult {
@@ -5048,7 +5431,11 @@ impl ThroughputSettingsUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UniqueKey {
     #[doc = "List of paths must be unique for each document in the Azure Cosmos DB service"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<Path>,
 }
 impl UniqueKey {
@@ -5060,7 +5447,12 @@ impl UniqueKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UniqueKeyPolicy {
     #[doc = "List of unique keys on that enforces uniqueness constraint on documents in the collection in the Azure Cosmos DB service."]
-    #[serde(rename = "uniqueKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "uniqueKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unique_keys: Vec<UniqueKey>,
 }
 impl UniqueKeyPolicy {
@@ -5143,7 +5535,11 @@ impl Usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsagesResult {
     #[doc = "The list of usages for the database. A usage is a point in time metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsagesResult {
diff --git a/services/mgmt/cosmosdb/src/package_preview_2021_10/models.rs b/services/mgmt/cosmosdb/src/package_preview_2021_10/models.rs
index a24bd3e4f7..92af2e4936 100644
--- a/services/mgmt/cosmosdb/src/package_preview_2021_10/models.rs
+++ b/services/mgmt/cosmosdb/src/package_preview_2021_10/models.rs
@@ -220,7 +220,12 @@ pub struct AuthenticationMethodLdapProperties {
     #[doc = "Template to use for searching. Defaults to (cn=%s) where %s will be replaced by the username used to login."]
     #[serde(rename = "searchFilterTemplate", default, skip_serializing_if = "Option::is_none")]
     pub search_filter_template: Option<String>,
-    #[serde(rename = "serverCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_certificates: Vec<Certificate>,
 }
 impl AuthenticationMethodLdapProperties {
@@ -516,10 +521,20 @@ pub struct CassandraClusterPublicStatus {
     #[serde(rename = "reaperStatus", default, skip_serializing_if = "Option::is_none")]
     pub reaper_status: Option<ManagedCassandraReaperStatus>,
     #[doc = "List relevant information about any connection errors to the Datacenters."]
-    #[serde(rename = "connectionErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_errors: Vec<ConnectionError>,
     #[doc = "List of the status of each datacenter in this cluster."]
-    #[serde(rename = "dataCenters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataCenters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_centers: Vec<serde_json::Value>,
 }
 impl CassandraClusterPublicStatus {
@@ -588,7 +603,11 @@ impl CassandraKeyspaceGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraKeyspaceListResult {
     #[doc = "List of Cassandra keyspaces and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CassandraKeyspaceGetResults>,
 }
 impl azure_core::Continuable for CassandraKeyspaceListResult {
@@ -629,13 +648,27 @@ impl CassandraPartitionKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraSchema {
     #[doc = "List of Cassandra table columns."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<Column>,
     #[doc = "List of partition key."]
-    #[serde(rename = "partitionKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_keys: Vec<CassandraPartitionKey>,
     #[doc = "List of cluster key."]
-    #[serde(rename = "clusterKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_keys: Vec<ClusterKey>,
 }
 impl CassandraSchema {
@@ -704,7 +737,11 @@ impl CassandraTableGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraTableListResult {
     #[doc = "List of Cassandra tables and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CassandraTableGetResults>,
 }
 impl azure_core::Continuable for CassandraTableListResult {
@@ -804,7 +841,11 @@ impl CassandraViewGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraViewListResult {
     #[doc = "List of Cassandra views and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CassandraViewGetResults>,
 }
 impl azure_core::Continuable for CassandraViewListResult {
@@ -915,7 +956,11 @@ impl ClientEncryptionKeyResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientEncryptionKeysListResult {
     #[doc = "List of client encryption keys and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientEncryptionKeyGetResults>,
 }
 impl azure_core::Continuable for ClientEncryptionKeysListResult {
@@ -1008,19 +1053,44 @@ pub mod cluster_resource {
         #[serde(rename = "repairEnabled", default, skip_serializing_if = "Option::is_none")]
         pub repair_enabled: Option<bool>,
         #[doc = "List of TLS certificates used to authorize clients connecting to the cluster. All connections are TLS encrypted whether clientCertificates is set or not, but if clientCertificates is set, the managed Cassandra cluster will reject all connections not bearing a TLS client certificate that can be validated from one or more of the public certificates in this property."]
-        #[serde(rename = "clientCertificates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "clientCertificates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub client_certificates: Vec<Certificate>,
         #[doc = "List of TLS certificates used to authorize gossip from unmanaged data centers. The TLS certificates of all nodes in unmanaged data centers must be verifiable using one of the certificates provided in this property."]
-        #[serde(rename = "externalGossipCertificates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "externalGossipCertificates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub external_gossip_certificates: Vec<Certificate>,
         #[doc = "List of TLS certificates that unmanaged nodes must trust for gossip with managed nodes. All managed nodes will present TLS client certificates that are verifiable using one of the certificates provided in this property."]
-        #[serde(rename = "gossipCertificates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "gossipCertificates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub gossip_certificates: Vec<Certificate>,
         #[doc = "List of IP addresses of seed nodes in unmanaged data centers. These will be added to the seed node lists of all managed nodes."]
-        #[serde(rename = "externalSeedNodes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "externalSeedNodes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub external_seed_nodes: Vec<SeedNode>,
         #[doc = "List of IP addresses of seed nodes in the managed data centers. These should be added to the seed node lists of all unmanaged nodes."]
-        #[serde(rename = "seedNodes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "seedNodes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub seed_nodes: Vec<SeedNode>,
         #[doc = "Number of hours to wait between taking a backup of the cluster."]
         #[serde(rename = "hoursBetweenBackups", default, skip_serializing_if = "Option::is_none")]
@@ -1407,7 +1477,11 @@ pub mod consistency_policy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerPartitionKey {
     #[doc = "List of paths using which data within the container can be partitioned"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<Path>,
     #[doc = "Indicates the kind of algorithm used for partitioning. For MultiHash, multiple partition keys (upto three maximum) are supported for container create"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1659,7 +1733,12 @@ pub mod data_center_resource {
         #[serde(rename = "nodeCount", default, skip_serializing_if = "Option::is_none")]
         pub node_count: Option<i32>,
         #[doc = "IP addresses for seed nodes in this data center. This is for reference. Generally you will want to use the seedNodes property on the cluster, which aggregates the seed nodes from all data centers in the cluster."]
-        #[serde(rename = "seedNodes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "seedNodes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub seed_nodes: Vec<SeedNode>,
         #[doc = "A fragment of a cassandra.yaml configuration file to be included in the cassandra.yaml for all nodes in this data center. The fragment should be Base64 encoded, and only a subset of keys are allowed."]
         #[serde(rename = "base64EncodedCassandraYamlFragment", default, skip_serializing_if = "Option::is_none")]
@@ -1751,7 +1830,11 @@ pub mod data_transfer_data_source_sink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataTransferJobFeedResults {
     #[doc = "List of Data Transfer jobs and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataTransferJobGetResults>,
     #[doc = "URL to get the next set of Data Transfer job list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1851,7 +1934,11 @@ pub struct DataTransferServiceResourceProperties {
     #[serde(flatten)]
     pub service_resource_properties: ServiceResourceProperties,
     #[doc = "An array that contains all of the locations for the service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<DataTransferRegionalServiceResource>,
 }
 impl DataTransferServiceResourceProperties {
@@ -1971,10 +2058,19 @@ pub struct DatabaseAccountCreateUpdateProperties {
     #[serde(rename = "enableAutomaticFailover", default, skip_serializing_if = "Option::is_none")]
     pub enable_automatic_failover: Option<bool>,
     #[doc = "List of Cosmos DB capabilities for the account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
     #[doc = "List of Virtual Network ACL rules configured for the Cosmos DB account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "Enables the account to write in multiple locations"]
     #[serde(rename = "enableMultipleWriteLocations", default, skip_serializing_if = "Option::is_none")]
@@ -2015,13 +2111,22 @@ pub struct DatabaseAccountCreateUpdateProperties {
     #[serde(rename = "backupPolicy", default, skip_serializing_if = "Option::is_none")]
     pub backup_policy: Option<BackupPolicy>,
     #[doc = "The CORS policy for the Cosmos DB database account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors: Vec<CorsPolicy>,
     #[doc = "Indicates what services are allowed to bypass firewall checks."]
     #[serde(rename = "networkAclBypass", default, skip_serializing_if = "Option::is_none")]
     pub network_acl_bypass: Option<NetworkAclBypass>,
     #[doc = "An array that contains the Resource Ids for Network Acl Bypass for the Cosmos DB account."]
-    #[serde(rename = "networkAclBypassResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAclBypassResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_acl_bypass_resource_ids: Vec<String>,
     #[doc = "Indicates what diagnostic log settings are to be enabled."]
     #[serde(rename = "diagnosticLogSettings", default, skip_serializing_if = "Option::is_none")]
@@ -2095,25 +2200,58 @@ pub struct DatabaseAccountGetProperties {
     #[serde(rename = "consistencyPolicy", default, skip_serializing_if = "Option::is_none")]
     pub consistency_policy: Option<ConsistencyPolicy>,
     #[doc = "List of Cosmos DB capabilities for the account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
     #[doc = "An array that contains the write location for the Cosmos DB account."]
-    #[serde(rename = "writeLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "writeLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub write_locations: Vec<Location>,
     #[doc = "An array that contains of the read locations enabled for the Cosmos DB account."]
-    #[serde(rename = "readLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "readLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub read_locations: Vec<Location>,
     #[doc = "An array that contains all of the locations enabled for the Cosmos DB account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<Location>,
     #[doc = "An array that contains the regions ordered by their failover priorities."]
-    #[serde(rename = "failoverPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "failoverPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub failover_policies: Vec<FailoverPolicy>,
     #[doc = "List of Virtual Network ACL rules configured for the Cosmos DB account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "List of Private Endpoint Connections configured for the Cosmos DB account."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Enables the account to write in multiple locations"]
     #[serde(rename = "enableMultipleWriteLocations", default, skip_serializing_if = "Option::is_none")]
@@ -2160,13 +2298,22 @@ pub struct DatabaseAccountGetProperties {
     #[serde(rename = "backupPolicy", default, skip_serializing_if = "Option::is_none")]
     pub backup_policy: Option<BackupPolicy>,
     #[doc = "The CORS policy for the Cosmos DB database account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors: Vec<CorsPolicy>,
     #[doc = "Indicates what services are allowed to bypass firewall checks."]
     #[serde(rename = "networkAclBypass", default, skip_serializing_if = "Option::is_none")]
     pub network_acl_bypass: Option<NetworkAclBypass>,
     #[doc = "An array that contains the Resource Ids for Network Acl Bypass for the Cosmos DB account."]
-    #[serde(rename = "networkAclBypassResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAclBypassResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_acl_bypass_resource_ids: Vec<String>,
     #[doc = "Indicates what diagnostic log settings are to be enabled."]
     #[serde(rename = "diagnosticLogSettings", default, skip_serializing_if = "Option::is_none")]
@@ -2259,7 +2406,12 @@ pub mod database_account_get_results {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseAccountListConnectionStringsResult {
     #[doc = "An array that contains the connection strings for the Cosmos DB account."]
-    #[serde(rename = "connectionStrings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionStrings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_strings: Vec<DatabaseAccountConnectionString>,
 }
 impl DatabaseAccountListConnectionStringsResult {
@@ -2392,7 +2544,11 @@ pub struct DatabaseAccountUpdateProperties {
     #[serde(rename = "consistencyPolicy", default, skip_serializing_if = "Option::is_none")]
     pub consistency_policy: Option<ConsistencyPolicy>,
     #[doc = "An array that contains the georeplication locations enabled for the Cosmos DB account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<Location>,
     #[doc = "Array of IpAddressOrRange objects."]
     #[serde(rename = "ipRules", default, skip_serializing_if = "Option::is_none")]
@@ -2404,10 +2560,19 @@ pub struct DatabaseAccountUpdateProperties {
     #[serde(rename = "enableAutomaticFailover", default, skip_serializing_if = "Option::is_none")]
     pub enable_automatic_failover: Option<bool>,
     #[doc = "List of Cosmos DB capabilities for the account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
     #[doc = "List of Virtual Network ACL rules configured for the Cosmos DB account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "Enables the account to write in multiple locations"]
     #[serde(rename = "enableMultipleWriteLocations", default, skip_serializing_if = "Option::is_none")]
@@ -2445,13 +2610,22 @@ pub struct DatabaseAccountUpdateProperties {
     #[serde(rename = "backupPolicy", default, skip_serializing_if = "Option::is_none")]
     pub backup_policy: Option<BackupPolicy>,
     #[doc = "The CORS policy for the Cosmos DB database account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors: Vec<CorsPolicy>,
     #[doc = "Indicates what services are allowed to bypass firewall checks."]
     #[serde(rename = "networkAclBypass", default, skip_serializing_if = "Option::is_none")]
     pub network_acl_bypass: Option<NetworkAclBypass>,
     #[doc = "An array that contains the Resource Ids for Network Acl Bypass for the Cosmos DB account."]
-    #[serde(rename = "networkAclBypassResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAclBypassResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_acl_bypass_resource_ids: Vec<String>,
     #[doc = "Indicates what diagnostic log settings are to be enabled."]
     #[serde(rename = "diagnosticLogSettings", default, skip_serializing_if = "Option::is_none")]
@@ -2472,7 +2646,11 @@ impl DatabaseAccountUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseAccountsListResult {
     #[doc = "List of database account and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseAccountGetResults>,
 }
 impl azure_core::Continuable for DatabaseAccountsListResult {
@@ -2493,7 +2671,12 @@ pub struct DatabaseRestoreResource {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "The names of the collections available for restore."]
-    #[serde(rename = "collectionNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectionNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collection_names: Vec<CollectionName>,
 }
 impl DatabaseRestoreResource {
@@ -2638,7 +2821,11 @@ pub struct GraphApiComputeServiceResourceProperties {
     #[serde(rename = "graphApiComputeEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub graph_api_compute_endpoint: Option<String>,
     #[doc = "An array that contains all of the locations for the service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<GraphApiComputeRegionalServiceResource>,
 }
 impl GraphApiComputeServiceResourceProperties {
@@ -2722,7 +2909,11 @@ impl GraphResourceGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GraphResourcesListResult {
     #[doc = "List of Graph resource and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GraphResourceGetResults>,
 }
 impl azure_core::Continuable for GraphResourcesListResult {
@@ -2797,7 +2988,11 @@ impl GremlinDatabaseGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GremlinDatabaseListResult {
     #[doc = "List of Gremlin databases and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GremlinDatabaseGetResults>,
 }
 impl azure_core::Continuable for GremlinDatabaseListResult {
@@ -2883,7 +3078,11 @@ impl GremlinGraphGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GremlinGraphListResult {
     #[doc = "List of graphs and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GremlinGraphGetResults>,
 }
 impl azure_core::Continuable for GremlinGraphListResult {
@@ -2938,7 +3137,11 @@ pub struct IncludedPath {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "List of indexes for this path"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub indexes: Vec<Indexes>,
 }
 impl IncludedPath {
@@ -3071,16 +3274,36 @@ pub struct IndexingPolicy {
     #[serde(rename = "indexingMode", default, skip_serializing_if = "Option::is_none")]
     pub indexing_mode: Option<indexing_policy::IndexingMode>,
     #[doc = "List of paths to include in the indexing"]
-    #[serde(rename = "includedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_paths: Vec<IncludedPath>,
     #[doc = "List of paths to exclude from indexing"]
-    #[serde(rename = "excludedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_paths: Vec<ExcludedPath>,
     #[doc = "List of composite path list"]
-    #[serde(rename = "compositeIndexes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "compositeIndexes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub composite_indexes: Vec<CompositePathList>,
     #[doc = "List of spatial specifics"]
-    #[serde(rename = "spatialIndexes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "spatialIndexes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub spatial_indexes: Vec<SpatialSpec>,
 }
 impl IndexingPolicy {
@@ -3173,7 +3396,11 @@ impl KeyWrapMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListBackups {
     #[doc = "Container for array of backups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupResource>,
 }
 impl azure_core::Continuable for ListBackups {
@@ -3191,7 +3418,11 @@ impl ListBackups {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListClusters {
     #[doc = "Container for the array of clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClusterResource>,
 }
 impl azure_core::Continuable for ListClusters {
@@ -3209,7 +3440,11 @@ impl ListClusters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListDataCenters {
     #[doc = "Container for array of data centers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataCenterResource>,
 }
 impl azure_core::Continuable for ListDataCenters {
@@ -3268,7 +3503,11 @@ impl LocationGetResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocationListResult {
     #[doc = "List of Cosmos DB locations and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LocationGetResult>,
 }
 impl azure_core::Continuable for LocationListResult {
@@ -3295,7 +3534,12 @@ pub struct LocationProperties {
     #[serde(rename = "isResidencyRestricted", default, skip_serializing_if = "Option::is_none")]
     pub is_residency_restricted: Option<bool>,
     #[doc = "The properties of available backup storage redundancies."]
-    #[serde(rename = "backupStorageRedundancies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupStorageRedundancies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_storage_redundancies: Vec<BackupStorageRedundancy>,
 }
 impl LocationProperties {
@@ -3589,7 +3833,11 @@ pub struct MaterializedViewsBuilderServiceResourceProperties {
     #[serde(flatten)]
     pub service_resource_properties: ServiceResourceProperties,
     #[doc = "An array that contains all of the locations for the service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<MaterializedViewsBuilderRegionalServiceResource>,
 }
 impl MaterializedViewsBuilderServiceResourceProperties {
@@ -3619,7 +3867,12 @@ pub struct Metric {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<MetricName>,
     #[doc = "The metric values for the specified time window and timestep."]
-    #[serde(rename = "metricValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_values: Vec<MetricValue>,
 }
 impl Metric {
@@ -3646,7 +3899,12 @@ impl MetricAvailability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricDefinition {
     #[doc = "The list of metric availabilities for the account."]
-    #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricAvailabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_availabilities: Vec<MetricAvailability>,
     #[doc = "The primary aggregation type of the metric."]
     #[serde(rename = "primaryAggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -3718,7 +3976,11 @@ pub mod metric_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricDefinitionsListResult {
     #[doc = "The list of metric definitions for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetricDefinition>,
 }
 impl azure_core::Continuable for MetricDefinitionsListResult {
@@ -3736,7 +3998,11 @@ impl MetricDefinitionsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricListResult {
     #[doc = "The list of metrics for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Metric>,
 }
 impl azure_core::Continuable for MetricListResult {
@@ -3853,7 +4119,11 @@ impl MongoDbCollectionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoDbCollectionListResult {
     #[doc = "List of MongoDB collections and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoDbCollectionGetResults>,
 }
 impl azure_core::Continuable for MongoDbCollectionListResult {
@@ -3876,7 +4146,11 @@ pub struct MongoDbCollectionResource {
     #[serde(rename = "shardKey", default, skip_serializing_if = "Option::is_none")]
     pub shard_key: Option<ShardKeys>,
     #[doc = "List of index keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub indexes: Vec<MongoIndex>,
     #[doc = "Analytical TTL."]
     #[serde(rename = "analyticalStorageTtl", default, skip_serializing_if = "Option::is_none")]
@@ -3953,7 +4227,11 @@ impl MongoDbDatabaseGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoDbDatabaseListResult {
     #[doc = "List of MongoDB databases and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoDbDatabaseGetResults>,
 }
 impl azure_core::Continuable for MongoDbDatabaseListResult {
@@ -3997,7 +4275,11 @@ impl MongoIndex {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoIndexKeys {
     #[doc = "List of keys for each MongoDB collection in the Azure Cosmos DB service"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<Key>,
 }
 impl MongoIndexKeys {
@@ -4050,7 +4332,11 @@ impl MongoRoleDefinitionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoRoleDefinitionListResult {
     #[doc = "List of Mongo Role Definitions and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoRoleDefinitionGetResults>,
 }
 impl azure_core::Continuable for MongoRoleDefinitionListResult {
@@ -4077,10 +4363,18 @@ pub struct MongoRoleDefinitionResource {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "A set of privileges contained by the Role Definition. This will allow application of this Role Definition on the entire database account or any underlying Database / Collection. Scopes higher than Database are not enforceable as privilege."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub privileges: Vec<Privilege>,
     #[doc = "The set of roles inherited by this Role Definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<Role>,
 }
 impl MongoRoleDefinitionResource {
@@ -4127,7 +4421,11 @@ impl MongoUserDefinitionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoUserDefinitionListResult {
     #[doc = "List of User Definition and their properties"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoUserDefinitionGetResults>,
 }
 impl azure_core::Continuable for MongoUserDefinitionListResult {
@@ -4157,7 +4455,11 @@ pub struct MongoUserDefinitionResource {
     #[serde(rename = "customData", default, skip_serializing_if = "Option::is_none")]
     pub custom_data: Option<String>,
     #[doc = "The set of roles inherited by the User Definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<Role>,
     #[doc = "The Mongo Auth mechanism. For now, we only support auth mechanism SCRAM-SHA-256."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4218,7 +4520,11 @@ impl NotebookWorkspaceCreateUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotebookWorkspaceListResult {
     #[doc = "Array of notebook workspace resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotebookWorkspace>,
 }
 impl azure_core::Continuable for NotebookWorkspaceListResult {
@@ -4290,7 +4596,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Resource Provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4383,7 +4693,11 @@ impl PartitionMetric {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartitionMetricListResult {
     #[doc = "The list of partition-level metrics for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartitionMetric>,
 }
 impl azure_core::Continuable for PartitionMetricListResult {
@@ -4418,7 +4732,11 @@ impl PartitionUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartitionUsagesResult {
     #[doc = "The list of partition-level usages for the database. A usage is a point in time metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartitionUsage>,
 }
 impl azure_core::Continuable for PartitionUsagesResult {
@@ -4452,7 +4770,12 @@ pub struct PercentileMetric {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<MetricName>,
     #[doc = "The percentile metric values for the specified time window and timestep."]
-    #[serde(rename = "metricValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_values: Vec<PercentileMetricValue>,
 }
 impl PercentileMetric {
@@ -4464,7 +4787,11 @@ impl PercentileMetric {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PercentileMetricListResult {
     #[doc = "The list of percentile metrics for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PercentileMetric>,
 }
 impl azure_core::Continuable for PercentileMetricListResult {
@@ -4549,10 +4876,20 @@ impl PeriodicModeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permission {
     #[doc = "An array of data actions that are allowed."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<String>,
     #[doc = "An array of data actions that are denied."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<String>,
 }
 impl Permission {
@@ -4578,7 +4915,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -4643,7 +4984,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -4664,10 +5009,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource required zone names."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -4700,7 +5055,11 @@ pub struct Privilege {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub resource: Option<privilege::Resource>,
     #[doc = "An array of actions that are allowed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
 }
 impl Privilege {
@@ -4862,7 +5221,12 @@ pub struct RestorableDatabaseAccountProperties {
     #[serde(rename = "apiType", default, skip_serializing_if = "Option::is_none")]
     pub api_type: Option<ApiType>,
     #[doc = "List of regions where the of the database account can be restored from."]
-    #[serde(rename = "restorableLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restorableLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restorable_locations: Vec<RestorableLocationResource>,
 }
 impl RestorableDatabaseAccountProperties {
@@ -4874,7 +5238,11 @@ impl RestorableDatabaseAccountProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableDatabaseAccountsListResult {
     #[doc = "List of restorable database accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableDatabaseAccountGetResult>,
 }
 impl azure_core::Continuable for RestorableDatabaseAccountsListResult {
@@ -4973,7 +5341,11 @@ pub mod restorable_mongodb_collection_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableMongodbCollectionsListResult {
     #[doc = "List of MongoDB collection events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableMongodbCollectionGetResult>,
 }
 impl azure_core::Continuable for RestorableMongodbCollectionsListResult {
@@ -5051,7 +5423,11 @@ pub mod restorable_mongodb_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableMongodbDatabasesListResult {
     #[doc = "List of MongoDB database events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableMongodbDatabaseGetResult>,
 }
 impl azure_core::Continuable for RestorableMongodbDatabasesListResult {
@@ -5069,7 +5445,11 @@ impl RestorableMongodbDatabasesListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableMongodbResourcesListResult {
     #[doc = "List of restorable MongoDB resources, including the database and collection names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseRestoreResource>,
 }
 impl azure_core::Continuable for RestorableMongodbResourcesListResult {
@@ -5173,7 +5553,11 @@ pub mod restorable_sql_container_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableSqlContainersListResult {
     #[doc = "List of SQL container events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableSqlContainerGetResult>,
 }
 impl azure_core::Continuable for RestorableSqlContainersListResult {
@@ -5285,7 +5669,11 @@ pub mod restorable_sql_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableSqlDatabasesListResult {
     #[doc = "List of SQL database events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableSqlDatabaseGetResult>,
 }
 impl azure_core::Continuable for RestorableSqlDatabasesListResult {
@@ -5303,7 +5691,11 @@ impl RestorableSqlDatabasesListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableSqlResourcesListResult {
     #[doc = "List of restorable SQL resources, including the database and collection names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseRestoreResource>,
 }
 impl azure_core::Continuable for RestorableSqlResourcesListResult {
@@ -5330,7 +5722,12 @@ pub struct RestoreParameters {
     #[serde(rename = "restoreTimestampInUtc", default, with = "azure_core::date::rfc3339::option")]
     pub restore_timestamp_in_utc: Option<time::OffsetDateTime>,
     #[doc = "List of specific databases available for restore."]
-    #[serde(rename = "databasesToRestore", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databasesToRestore",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases_to_restore: Vec<DatabaseRestoreResource>,
 }
 impl RestoreParameters {
@@ -5492,7 +5889,11 @@ impl Serialize for ServiceResourceInstanceSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceResourceListResult {
     #[doc = "List of Service Resource and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResource>,
 }
 impl azure_core::Continuable for ServiceResourceListResult {
@@ -5637,7 +6038,11 @@ pub struct SpatialSpec {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "List of path's spatial type"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub types: Vec<SpatialType>,
 }
 impl SpatialSpec {
@@ -5747,7 +6152,11 @@ impl SqlContainerGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlContainerListResult {
     #[doc = "List of containers and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlContainerGetResults>,
 }
 impl azure_core::Continuable for SqlContainerListResult {
@@ -5885,7 +6294,11 @@ impl SqlDatabaseGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlDatabaseListResult {
     #[doc = "List of SQL databases and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlDatabaseGetResults>,
 }
 impl azure_core::Continuable for SqlDatabaseListResult {
@@ -5945,7 +6358,11 @@ pub struct SqlDedicatedGatewayServiceResourceProperties {
     #[serde(rename = "sqlDedicatedGatewayEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub sql_dedicated_gateway_endpoint: Option<String>,
     #[doc = "An array that contains all of the locations for the service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<SqlDedicatedGatewayRegionalServiceResource>,
 }
 impl SqlDedicatedGatewayServiceResourceProperties {
@@ -5987,7 +6404,11 @@ impl SqlRoleAssignmentGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlRoleAssignmentListResult {
     #[doc = "List of Role Assignments and their properties"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlRoleAssignmentGetResults>,
 }
 impl azure_core::Continuable for SqlRoleAssignmentListResult {
@@ -6049,7 +6470,11 @@ impl SqlRoleDefinitionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlRoleDefinitionListResult {
     #[doc = "List of Role Definitions and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlRoleDefinitionGetResults>,
 }
 impl azure_core::Continuable for SqlRoleDefinitionListResult {
@@ -6073,10 +6498,19 @@ pub struct SqlRoleDefinitionResource {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<sql_role_definition_resource::Type>,
     #[doc = "A set of fully qualified Scopes at or below which Role Assignments may be created using this Role Definition. This will allow application of this Role Definition on the entire database account or any underlying Database / Collection. Must have at least one element. Scopes higher than Database account are not enforceable as assignable Scopes. Note that resources referenced in assignable Scopes need not exist."]
-    #[serde(rename = "assignableScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assignableScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assignable_scopes: Vec<String>,
     #[doc = "The set of operations allowed through this Role Definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<Permission>,
 }
 impl SqlRoleDefinitionResource {
@@ -6152,7 +6586,11 @@ impl SqlStoredProcedureGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlStoredProcedureListResult {
     #[doc = "List of storedProcedures and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlStoredProcedureGetResults>,
 }
 impl azure_core::Continuable for SqlStoredProcedureListResult {
@@ -6239,7 +6677,11 @@ impl SqlTriggerGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlTriggerListResult {
     #[doc = "List of triggers and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlTriggerGetResults>,
 }
 impl azure_core::Continuable for SqlTriggerListResult {
@@ -6420,7 +6862,11 @@ impl SqlUserDefinedFunctionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlUserDefinedFunctionListResult {
     #[doc = "List of userDefinedFunctions and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlUserDefinedFunctionGetResults>,
 }
 impl azure_core::Continuable for SqlUserDefinedFunctionListResult {
@@ -6509,7 +6955,11 @@ impl TableGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TableListResult {
     #[doc = "List of Table and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TableGetResults>,
 }
 impl azure_core::Continuable for TableListResult {
@@ -6634,7 +7084,11 @@ impl ThroughputSettingsUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UniqueKey {
     #[doc = "List of paths must be unique for each document in the Azure Cosmos DB service"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<Path>,
 }
 impl UniqueKey {
@@ -6646,7 +7100,12 @@ impl UniqueKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UniqueKeyPolicy {
     #[doc = "List of unique keys on that enforces uniqueness constraint on documents in the collection in the Azure Cosmos DB service."]
-    #[serde(rename = "uniqueKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "uniqueKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unique_keys: Vec<UniqueKey>,
 }
 impl UniqueKeyPolicy {
@@ -6729,7 +7188,11 @@ impl Usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsagesResult {
     #[doc = "The list of usages for the database. A usage is a point in time metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsagesResult {
diff --git a/services/mgmt/cosmosdb/src/package_preview_2021_11/models.rs b/services/mgmt/cosmosdb/src/package_preview_2021_11/models.rs
index 2b2fc5906d..82ee1bfc5a 100644
--- a/services/mgmt/cosmosdb/src/package_preview_2021_11/models.rs
+++ b/services/mgmt/cosmosdb/src/package_preview_2021_11/models.rs
@@ -220,7 +220,12 @@ pub struct AuthenticationMethodLdapProperties {
     #[doc = "Template to use for searching. Defaults to (cn=%s) where %s will be replaced by the username used to login."]
     #[serde(rename = "searchFilterTemplate", default, skip_serializing_if = "Option::is_none")]
     pub search_filter_template: Option<String>,
-    #[serde(rename = "serverCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_certificates: Vec<Certificate>,
 }
 impl AuthenticationMethodLdapProperties {
@@ -516,10 +521,20 @@ pub struct CassandraClusterPublicStatus {
     #[serde(rename = "reaperStatus", default, skip_serializing_if = "Option::is_none")]
     pub reaper_status: Option<ManagedCassandraReaperStatus>,
     #[doc = "List relevant information about any connection errors to the Datacenters."]
-    #[serde(rename = "connectionErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_errors: Vec<ConnectionError>,
     #[doc = "List of the status of each datacenter in this cluster."]
-    #[serde(rename = "dataCenters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataCenters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_centers: Vec<serde_json::Value>,
 }
 impl CassandraClusterPublicStatus {
@@ -588,7 +603,11 @@ impl CassandraKeyspaceGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraKeyspaceListResult {
     #[doc = "List of Cassandra keyspaces and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CassandraKeyspaceGetResults>,
 }
 impl azure_core::Continuable for CassandraKeyspaceListResult {
@@ -629,13 +648,27 @@ impl CassandraPartitionKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraSchema {
     #[doc = "List of Cassandra table columns."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<Column>,
     #[doc = "List of partition key."]
-    #[serde(rename = "partitionKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_keys: Vec<CassandraPartitionKey>,
     #[doc = "List of cluster key."]
-    #[serde(rename = "clusterKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_keys: Vec<ClusterKey>,
 }
 impl CassandraSchema {
@@ -704,7 +737,11 @@ impl CassandraTableGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraTableListResult {
     #[doc = "List of Cassandra tables and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CassandraTableGetResults>,
 }
 impl azure_core::Continuable for CassandraTableListResult {
@@ -804,7 +841,11 @@ impl CassandraViewGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraViewListResult {
     #[doc = "List of Cassandra views and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CassandraViewGetResults>,
 }
 impl azure_core::Continuable for CassandraViewListResult {
@@ -915,7 +956,11 @@ impl ClientEncryptionKeyResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientEncryptionKeysListResult {
     #[doc = "List of client encryption keys and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientEncryptionKeyGetResults>,
 }
 impl azure_core::Continuable for ClientEncryptionKeysListResult {
@@ -1008,19 +1053,44 @@ pub mod cluster_resource {
         #[serde(rename = "repairEnabled", default, skip_serializing_if = "Option::is_none")]
         pub repair_enabled: Option<bool>,
         #[doc = "List of TLS certificates used to authorize clients connecting to the cluster. All connections are TLS encrypted whether clientCertificates is set or not, but if clientCertificates is set, the managed Cassandra cluster will reject all connections not bearing a TLS client certificate that can be validated from one or more of the public certificates in this property."]
-        #[serde(rename = "clientCertificates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "clientCertificates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub client_certificates: Vec<Certificate>,
         #[doc = "List of TLS certificates used to authorize gossip from unmanaged data centers. The TLS certificates of all nodes in unmanaged data centers must be verifiable using one of the certificates provided in this property."]
-        #[serde(rename = "externalGossipCertificates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "externalGossipCertificates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub external_gossip_certificates: Vec<Certificate>,
         #[doc = "List of TLS certificates that unmanaged nodes must trust for gossip with managed nodes. All managed nodes will present TLS client certificates that are verifiable using one of the certificates provided in this property."]
-        #[serde(rename = "gossipCertificates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "gossipCertificates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub gossip_certificates: Vec<Certificate>,
         #[doc = "List of IP addresses of seed nodes in unmanaged data centers. These will be added to the seed node lists of all managed nodes."]
-        #[serde(rename = "externalSeedNodes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "externalSeedNodes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub external_seed_nodes: Vec<SeedNode>,
         #[doc = "List of IP addresses of seed nodes in the managed data centers. These should be added to the seed node lists of all unmanaged nodes."]
-        #[serde(rename = "seedNodes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "seedNodes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub seed_nodes: Vec<SeedNode>,
         #[doc = "Number of hours to wait between taking a backup of the cluster."]
         #[serde(rename = "hoursBetweenBackups", default, skip_serializing_if = "Option::is_none")]
@@ -1407,7 +1477,11 @@ pub mod consistency_policy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerPartitionKey {
     #[doc = "List of paths using which data within the container can be partitioned"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<Path>,
     #[doc = "Indicates the kind of algorithm used for partitioning. For MultiHash, multiple partition keys (upto three maximum) are supported for container create"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1678,7 +1752,12 @@ pub mod data_center_resource {
         #[serde(rename = "nodeCount", default, skip_serializing_if = "Option::is_none")]
         pub node_count: Option<i32>,
         #[doc = "IP addresses for seed nodes in this data center. This is for reference. Generally you will want to use the seedNodes property on the cluster, which aggregates the seed nodes from all data centers in the cluster."]
-        #[serde(rename = "seedNodes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "seedNodes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub seed_nodes: Vec<SeedNode>,
         #[doc = "A fragment of a cassandra.yaml configuration file to be included in the cassandra.yaml for all nodes in this data center. The fragment should be Base64 encoded, and only a subset of keys are allowed."]
         #[serde(rename = "base64EncodedCassandraYamlFragment", default, skip_serializing_if = "Option::is_none")]
@@ -1773,7 +1852,11 @@ pub mod data_transfer_data_source_sink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataTransferJobFeedResults {
     #[doc = "List of Data Transfer jobs and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataTransferJobGetResults>,
     #[doc = "URL to get the next set of Data Transfer job list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1873,7 +1956,11 @@ pub struct DataTransferServiceResourceProperties {
     #[serde(flatten)]
     pub service_resource_properties: ServiceResourceProperties,
     #[doc = "An array that contains all of the locations for the service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<DataTransferRegionalServiceResource>,
 }
 impl DataTransferServiceResourceProperties {
@@ -1993,10 +2080,19 @@ pub struct DatabaseAccountCreateUpdateProperties {
     #[serde(rename = "enableAutomaticFailover", default, skip_serializing_if = "Option::is_none")]
     pub enable_automatic_failover: Option<bool>,
     #[doc = "List of Cosmos DB capabilities for the account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
     #[doc = "List of Virtual Network ACL rules configured for the Cosmos DB account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "Enables the account to write in multiple locations"]
     #[serde(rename = "enableMultipleWriteLocations", default, skip_serializing_if = "Option::is_none")]
@@ -2037,13 +2133,22 @@ pub struct DatabaseAccountCreateUpdateProperties {
     #[serde(rename = "backupPolicy", default, skip_serializing_if = "Option::is_none")]
     pub backup_policy: Option<BackupPolicy>,
     #[doc = "The CORS policy for the Cosmos DB database account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors: Vec<CorsPolicy>,
     #[doc = "Indicates what services are allowed to bypass firewall checks."]
     #[serde(rename = "networkAclBypass", default, skip_serializing_if = "Option::is_none")]
     pub network_acl_bypass: Option<NetworkAclBypass>,
     #[doc = "An array that contains the Resource Ids for Network Acl Bypass for the Cosmos DB account."]
-    #[serde(rename = "networkAclBypassResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAclBypassResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_acl_bypass_resource_ids: Vec<String>,
     #[doc = "Indicates what diagnostic log settings are to be enabled."]
     #[serde(rename = "diagnosticLogSettings", default, skip_serializing_if = "Option::is_none")]
@@ -2121,25 +2226,58 @@ pub struct DatabaseAccountGetProperties {
     #[serde(rename = "consistencyPolicy", default, skip_serializing_if = "Option::is_none")]
     pub consistency_policy: Option<ConsistencyPolicy>,
     #[doc = "List of Cosmos DB capabilities for the account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
     #[doc = "An array that contains the write location for the Cosmos DB account."]
-    #[serde(rename = "writeLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "writeLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub write_locations: Vec<Location>,
     #[doc = "An array that contains of the read locations enabled for the Cosmos DB account."]
-    #[serde(rename = "readLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "readLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub read_locations: Vec<Location>,
     #[doc = "An array that contains all of the locations enabled for the Cosmos DB account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<Location>,
     #[doc = "An array that contains the regions ordered by their failover priorities."]
-    #[serde(rename = "failoverPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "failoverPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub failover_policies: Vec<FailoverPolicy>,
     #[doc = "List of Virtual Network ACL rules configured for the Cosmos DB account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "List of Private Endpoint Connections configured for the Cosmos DB account."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Enables the account to write in multiple locations"]
     #[serde(rename = "enableMultipleWriteLocations", default, skip_serializing_if = "Option::is_none")]
@@ -2186,13 +2324,22 @@ pub struct DatabaseAccountGetProperties {
     #[serde(rename = "backupPolicy", default, skip_serializing_if = "Option::is_none")]
     pub backup_policy: Option<BackupPolicy>,
     #[doc = "The CORS policy for the Cosmos DB database account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors: Vec<CorsPolicy>,
     #[doc = "Indicates what services are allowed to bypass firewall checks."]
     #[serde(rename = "networkAclBypass", default, skip_serializing_if = "Option::is_none")]
     pub network_acl_bypass: Option<NetworkAclBypass>,
     #[doc = "An array that contains the Resource Ids for Network Acl Bypass for the Cosmos DB account."]
-    #[serde(rename = "networkAclBypassResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAclBypassResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_acl_bypass_resource_ids: Vec<String>,
     #[doc = "Indicates what diagnostic log settings are to be enabled."]
     #[serde(rename = "diagnosticLogSettings", default, skip_serializing_if = "Option::is_none")]
@@ -2288,7 +2435,12 @@ pub mod database_account_get_results {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseAccountListConnectionStringsResult {
     #[doc = "An array that contains the connection strings for the Cosmos DB account."]
-    #[serde(rename = "connectionStrings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionStrings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_strings: Vec<DatabaseAccountConnectionString>,
 }
 impl DatabaseAccountListConnectionStringsResult {
@@ -2421,7 +2573,11 @@ pub struct DatabaseAccountUpdateProperties {
     #[serde(rename = "consistencyPolicy", default, skip_serializing_if = "Option::is_none")]
     pub consistency_policy: Option<ConsistencyPolicy>,
     #[doc = "An array that contains the georeplication locations enabled for the Cosmos DB account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<Location>,
     #[doc = "Array of IpAddressOrRange objects."]
     #[serde(rename = "ipRules", default, skip_serializing_if = "Option::is_none")]
@@ -2433,10 +2589,19 @@ pub struct DatabaseAccountUpdateProperties {
     #[serde(rename = "enableAutomaticFailover", default, skip_serializing_if = "Option::is_none")]
     pub enable_automatic_failover: Option<bool>,
     #[doc = "List of Cosmos DB capabilities for the account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
     #[doc = "List of Virtual Network ACL rules configured for the Cosmos DB account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "Enables the account to write in multiple locations"]
     #[serde(rename = "enableMultipleWriteLocations", default, skip_serializing_if = "Option::is_none")]
@@ -2474,13 +2639,22 @@ pub struct DatabaseAccountUpdateProperties {
     #[serde(rename = "backupPolicy", default, skip_serializing_if = "Option::is_none")]
     pub backup_policy: Option<BackupPolicy>,
     #[doc = "The CORS policy for the Cosmos DB database account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors: Vec<CorsPolicy>,
     #[doc = "Indicates what services are allowed to bypass firewall checks."]
     #[serde(rename = "networkAclBypass", default, skip_serializing_if = "Option::is_none")]
     pub network_acl_bypass: Option<NetworkAclBypass>,
     #[doc = "An array that contains the Resource Ids for Network Acl Bypass for the Cosmos DB account."]
-    #[serde(rename = "networkAclBypassResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAclBypassResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_acl_bypass_resource_ids: Vec<String>,
     #[doc = "Indicates what diagnostic log settings are to be enabled."]
     #[serde(rename = "diagnosticLogSettings", default, skip_serializing_if = "Option::is_none")]
@@ -2504,7 +2678,11 @@ impl DatabaseAccountUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseAccountsListResult {
     #[doc = "List of database account and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseAccountGetResults>,
 }
 impl azure_core::Continuable for DatabaseAccountsListResult {
@@ -2525,7 +2703,12 @@ pub struct DatabaseRestoreResource {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "The names of the collections available for restore."]
-    #[serde(rename = "collectionNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectionNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collection_names: Vec<CollectionName>,
 }
 impl DatabaseRestoreResource {
@@ -2670,7 +2853,11 @@ pub struct GraphApiComputeServiceResourceProperties {
     #[serde(rename = "graphApiComputeEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub graph_api_compute_endpoint: Option<String>,
     #[doc = "An array that contains all of the locations for the service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<GraphApiComputeRegionalServiceResource>,
 }
 impl GraphApiComputeServiceResourceProperties {
@@ -2755,7 +2942,11 @@ impl GraphResourceGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GraphResourcesListResult {
     #[doc = "List of Graph resource and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GraphResourceGetResults>,
 }
 impl azure_core::Continuable for GraphResourcesListResult {
@@ -2830,7 +3021,11 @@ impl GremlinDatabaseGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GremlinDatabaseListResult {
     #[doc = "List of Gremlin databases and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GremlinDatabaseGetResults>,
 }
 impl azure_core::Continuable for GremlinDatabaseListResult {
@@ -2862,7 +3057,12 @@ pub struct GremlinDatabaseRestoreResource {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "The names of the graphs available for restore."]
-    #[serde(rename = "graphNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "graphNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub graph_names: Vec<GraphName>,
 }
 impl GremlinDatabaseRestoreResource {
@@ -2931,7 +3131,11 @@ impl GremlinGraphGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GremlinGraphListResult {
     #[doc = "List of graphs and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GremlinGraphGetResults>,
 }
 impl azure_core::Continuable for GremlinGraphListResult {
@@ -2986,7 +3190,11 @@ pub struct IncludedPath {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "List of indexes for this path"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub indexes: Vec<Indexes>,
 }
 impl IncludedPath {
@@ -3119,16 +3327,36 @@ pub struct IndexingPolicy {
     #[serde(rename = "indexingMode", default, skip_serializing_if = "Option::is_none")]
     pub indexing_mode: Option<indexing_policy::IndexingMode>,
     #[doc = "List of paths to include in the indexing"]
-    #[serde(rename = "includedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_paths: Vec<IncludedPath>,
     #[doc = "List of paths to exclude from indexing"]
-    #[serde(rename = "excludedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_paths: Vec<ExcludedPath>,
     #[doc = "List of composite path list"]
-    #[serde(rename = "compositeIndexes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "compositeIndexes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub composite_indexes: Vec<CompositePathList>,
     #[doc = "List of spatial specifics"]
-    #[serde(rename = "spatialIndexes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "spatialIndexes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub spatial_indexes: Vec<SpatialSpec>,
 }
 impl IndexingPolicy {
@@ -3224,7 +3452,11 @@ impl KeyWrapMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListBackups {
     #[doc = "Container for array of backups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupResource>,
 }
 impl azure_core::Continuable for ListBackups {
@@ -3242,7 +3474,11 @@ impl ListBackups {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListClusters {
     #[doc = "Container for the array of clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClusterResource>,
 }
 impl azure_core::Continuable for ListClusters {
@@ -3260,7 +3496,11 @@ impl ListClusters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListDataCenters {
     #[doc = "Container for array of data centers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataCenterResource>,
 }
 impl azure_core::Continuable for ListDataCenters {
@@ -3319,7 +3559,11 @@ impl LocationGetResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocationListResult {
     #[doc = "List of Cosmos DB locations and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LocationGetResult>,
 }
 impl azure_core::Continuable for LocationListResult {
@@ -3346,7 +3590,12 @@ pub struct LocationProperties {
     #[serde(rename = "isResidencyRestricted", default, skip_serializing_if = "Option::is_none")]
     pub is_residency_restricted: Option<bool>,
     #[doc = "The properties of available backup storage redundancies."]
-    #[serde(rename = "backupStorageRedundancies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupStorageRedundancies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_storage_redundancies: Vec<BackupStorageRedundancy>,
 }
 impl LocationProperties {
@@ -3640,7 +3889,11 @@ pub struct MaterializedViewsBuilderServiceResourceProperties {
     #[serde(flatten)]
     pub service_resource_properties: ServiceResourceProperties,
     #[doc = "An array that contains all of the locations for the service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<MaterializedViewsBuilderRegionalServiceResource>,
 }
 impl MaterializedViewsBuilderServiceResourceProperties {
@@ -3670,7 +3923,12 @@ pub struct Metric {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<MetricName>,
     #[doc = "The metric values for the specified time window and timestep."]
-    #[serde(rename = "metricValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_values: Vec<MetricValue>,
 }
 impl Metric {
@@ -3697,7 +3955,12 @@ impl MetricAvailability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricDefinition {
     #[doc = "The list of metric availabilities for the account."]
-    #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricAvailabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_availabilities: Vec<MetricAvailability>,
     #[doc = "The primary aggregation type of the metric."]
     #[serde(rename = "primaryAggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -3769,7 +4032,11 @@ pub mod metric_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricDefinitionsListResult {
     #[doc = "The list of metric definitions for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetricDefinition>,
 }
 impl azure_core::Continuable for MetricDefinitionsListResult {
@@ -3787,7 +4054,11 @@ impl MetricDefinitionsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricListResult {
     #[doc = "The list of metrics for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Metric>,
 }
 impl azure_core::Continuable for MetricListResult {
@@ -3904,7 +4175,11 @@ impl MongoDbCollectionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoDbCollectionListResult {
     #[doc = "List of MongoDB collections and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoDbCollectionGetResults>,
 }
 impl azure_core::Continuable for MongoDbCollectionListResult {
@@ -3927,7 +4202,11 @@ pub struct MongoDbCollectionResource {
     #[serde(rename = "shardKey", default, skip_serializing_if = "Option::is_none")]
     pub shard_key: Option<ShardKeys>,
     #[doc = "List of index keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub indexes: Vec<MongoIndex>,
     #[doc = "Analytical TTL."]
     #[serde(rename = "analyticalStorageTtl", default, skip_serializing_if = "Option::is_none")]
@@ -4004,7 +4283,11 @@ impl MongoDbDatabaseGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoDbDatabaseListResult {
     #[doc = "List of MongoDB databases and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoDbDatabaseGetResults>,
 }
 impl azure_core::Continuable for MongoDbDatabaseListResult {
@@ -4048,7 +4331,11 @@ impl MongoIndex {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoIndexKeys {
     #[doc = "List of keys for each MongoDB collection in the Azure Cosmos DB service"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<Key>,
 }
 impl MongoIndexKeys {
@@ -4101,7 +4388,11 @@ impl MongoRoleDefinitionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoRoleDefinitionListResult {
     #[doc = "List of Mongo Role Definitions and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoRoleDefinitionGetResults>,
 }
 impl azure_core::Continuable for MongoRoleDefinitionListResult {
@@ -4128,10 +4419,18 @@ pub struct MongoRoleDefinitionResource {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "A set of privileges contained by the Role Definition. This will allow application of this Role Definition on the entire database account or any underlying Database / Collection. Scopes higher than Database are not enforceable as privilege."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub privileges: Vec<Privilege>,
     #[doc = "The set of roles inherited by this Role Definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<Role>,
 }
 impl MongoRoleDefinitionResource {
@@ -4178,7 +4477,11 @@ impl MongoUserDefinitionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoUserDefinitionListResult {
     #[doc = "List of User Definition and their properties"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoUserDefinitionGetResults>,
 }
 impl azure_core::Continuable for MongoUserDefinitionListResult {
@@ -4208,7 +4511,11 @@ pub struct MongoUserDefinitionResource {
     #[serde(rename = "customData", default, skip_serializing_if = "Option::is_none")]
     pub custom_data: Option<String>,
     #[doc = "The set of roles inherited by the User Definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<Role>,
     #[doc = "The Mongo Auth mechanism. For now, we only support auth mechanism SCRAM-SHA-256."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4269,7 +4576,11 @@ impl NotebookWorkspaceCreateUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotebookWorkspaceListResult {
     #[doc = "Array of notebook workspace resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotebookWorkspace>,
 }
 impl azure_core::Continuable for NotebookWorkspaceListResult {
@@ -4341,7 +4652,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Resource Provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4434,7 +4749,11 @@ impl PartitionMetric {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartitionMetricListResult {
     #[doc = "The list of partition-level metrics for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartitionMetric>,
 }
 impl azure_core::Continuable for PartitionMetricListResult {
@@ -4469,7 +4788,11 @@ impl PartitionUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartitionUsagesResult {
     #[doc = "The list of partition-level usages for the database. A usage is a point in time metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartitionUsage>,
 }
 impl azure_core::Continuable for PartitionUsagesResult {
@@ -4503,7 +4826,12 @@ pub struct PercentileMetric {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<MetricName>,
     #[doc = "The percentile metric values for the specified time window and timestep."]
-    #[serde(rename = "metricValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_values: Vec<PercentileMetricValue>,
 }
 impl PercentileMetric {
@@ -4515,7 +4843,11 @@ impl PercentileMetric {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PercentileMetricListResult {
     #[doc = "The list of percentile metrics for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PercentileMetric>,
 }
 impl azure_core::Continuable for PercentileMetricListResult {
@@ -4600,10 +4932,20 @@ impl PeriodicModeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permission {
     #[doc = "An array of data actions that are allowed."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<String>,
     #[doc = "An array of data actions that are denied."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<String>,
 }
 impl Permission {
@@ -4629,7 +4971,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -4694,7 +5040,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -4715,10 +5065,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource required zone names."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -4751,7 +5111,11 @@ pub struct Privilege {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub resource: Option<privilege::Resource>,
     #[doc = "An array of actions that are allowed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
 }
 impl Privilege {
@@ -4913,7 +5277,12 @@ pub struct RestorableDatabaseAccountProperties {
     #[serde(rename = "apiType", default, skip_serializing_if = "Option::is_none")]
     pub api_type: Option<ApiType>,
     #[doc = "List of regions where the of the database account can be restored from."]
-    #[serde(rename = "restorableLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restorableLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restorable_locations: Vec<RestorableLocationResource>,
 }
 impl RestorableDatabaseAccountProperties {
@@ -4925,7 +5294,11 @@ impl RestorableDatabaseAccountProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableDatabaseAccountsListResult {
     #[doc = "List of restorable database accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableDatabaseAccountGetResult>,
 }
 impl azure_core::Continuable for RestorableDatabaseAccountsListResult {
@@ -5003,7 +5376,11 @@ pub mod restorable_gremlin_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableGremlinDatabasesListResult {
     #[doc = "List of Gremlin database events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableGremlinDatabaseGetResult>,
 }
 impl azure_core::Continuable for RestorableGremlinDatabasesListResult {
@@ -5081,7 +5458,11 @@ pub mod restorable_gremlin_graph_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableGremlinGraphsListResult {
     #[doc = "List of Gremlin graph events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableGremlinGraphGetResult>,
 }
 impl azure_core::Continuable for RestorableGremlinGraphsListResult {
@@ -5099,7 +5480,11 @@ impl RestorableGremlinGraphsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableGremlinResourcesListResult {
     #[doc = "List of restorable Gremlin resources, including the gremlin database and graph names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GremlinDatabaseRestoreResource>,
 }
 impl azure_core::Continuable for RestorableGremlinResourcesListResult {
@@ -5198,7 +5583,11 @@ pub mod restorable_mongodb_collection_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableMongodbCollectionsListResult {
     #[doc = "List of MongoDB collection events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableMongodbCollectionGetResult>,
 }
 impl azure_core::Continuable for RestorableMongodbCollectionsListResult {
@@ -5276,7 +5665,11 @@ pub mod restorable_mongodb_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableMongodbDatabasesListResult {
     #[doc = "List of MongoDB database events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableMongodbDatabaseGetResult>,
 }
 impl azure_core::Continuable for RestorableMongodbDatabasesListResult {
@@ -5294,7 +5687,11 @@ impl RestorableMongodbDatabasesListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableMongodbResourcesListResult {
     #[doc = "List of restorable MongoDB resources, including the database and collection names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseRestoreResource>,
 }
 impl azure_core::Continuable for RestorableMongodbResourcesListResult {
@@ -5398,7 +5795,11 @@ pub mod restorable_sql_container_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableSqlContainersListResult {
     #[doc = "List of SQL container events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableSqlContainerGetResult>,
 }
 impl azure_core::Continuable for RestorableSqlContainersListResult {
@@ -5510,7 +5911,11 @@ pub mod restorable_sql_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableSqlDatabasesListResult {
     #[doc = "List of SQL database events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableSqlDatabaseGetResult>,
 }
 impl azure_core::Continuable for RestorableSqlDatabasesListResult {
@@ -5528,7 +5933,11 @@ impl RestorableSqlDatabasesListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableSqlResourcesListResult {
     #[doc = "List of restorable SQL resources, including the database and collection names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseRestoreResource>,
 }
 impl azure_core::Continuable for RestorableSqlResourcesListResult {
@@ -5606,7 +6015,11 @@ pub mod restorable_table_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableTableResourcesListResult {
     #[doc = "List of restorable table names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TableName>,
 }
 impl azure_core::Continuable for RestorableTableResourcesListResult {
@@ -5624,7 +6037,11 @@ impl RestorableTableResourcesListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableTablesListResult {
     #[doc = "List of Table events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableTableGetResult>,
 }
 impl azure_core::Continuable for RestorableTablesListResult {
@@ -5651,13 +6068,28 @@ pub struct RestoreParameters {
     #[serde(rename = "restoreTimestampInUtc", default, with = "azure_core::date::rfc3339::option")]
     pub restore_timestamp_in_utc: Option<time::OffsetDateTime>,
     #[doc = "List of specific databases available for restore."]
-    #[serde(rename = "databasesToRestore", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databasesToRestore",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases_to_restore: Vec<DatabaseRestoreResource>,
     #[doc = "List of specific gremlin databases available for restore."]
-    #[serde(rename = "gremlinDatabasesToRestore", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gremlinDatabasesToRestore",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gremlin_databases_to_restore: Vec<GremlinDatabaseRestoreResource>,
     #[doc = "List of specific tables available for restore."]
-    #[serde(rename = "tablesToRestore", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tablesToRestore",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables_to_restore: Vec<TableName>,
 }
 impl RestoreParameters {
@@ -5819,7 +6251,11 @@ impl Serialize for ServiceResourceInstanceSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceResourceListResult {
     #[doc = "List of Service Resource and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResource>,
 }
 impl azure_core::Continuable for ServiceResourceListResult {
@@ -5964,7 +6400,11 @@ pub struct SpatialSpec {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "List of path's spatial type"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub types: Vec<SpatialType>,
 }
 impl SpatialSpec {
@@ -6074,7 +6514,11 @@ impl SqlContainerGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlContainerListResult {
     #[doc = "List of containers and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlContainerGetResults>,
 }
 impl azure_core::Continuable for SqlContainerListResult {
@@ -6212,7 +6656,11 @@ impl SqlDatabaseGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlDatabaseListResult {
     #[doc = "List of SQL databases and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlDatabaseGetResults>,
 }
 impl azure_core::Continuable for SqlDatabaseListResult {
@@ -6272,7 +6720,11 @@ pub struct SqlDedicatedGatewayServiceResourceProperties {
     #[serde(rename = "sqlDedicatedGatewayEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub sql_dedicated_gateway_endpoint: Option<String>,
     #[doc = "An array that contains all of the locations for the service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<SqlDedicatedGatewayRegionalServiceResource>,
 }
 impl SqlDedicatedGatewayServiceResourceProperties {
@@ -6314,7 +6766,11 @@ impl SqlRoleAssignmentGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlRoleAssignmentListResult {
     #[doc = "List of Role Assignments and their properties"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlRoleAssignmentGetResults>,
 }
 impl azure_core::Continuable for SqlRoleAssignmentListResult {
@@ -6376,7 +6832,11 @@ impl SqlRoleDefinitionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlRoleDefinitionListResult {
     #[doc = "List of Role Definitions and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlRoleDefinitionGetResults>,
 }
 impl azure_core::Continuable for SqlRoleDefinitionListResult {
@@ -6400,10 +6860,19 @@ pub struct SqlRoleDefinitionResource {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<sql_role_definition_resource::Type>,
     #[doc = "A set of fully qualified Scopes at or below which Role Assignments may be created using this Role Definition. This will allow application of this Role Definition on the entire database account or any underlying Database / Collection. Must have at least one element. Scopes higher than Database account are not enforceable as assignable Scopes. Note that resources referenced in assignable Scopes need not exist."]
-    #[serde(rename = "assignableScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assignableScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assignable_scopes: Vec<String>,
     #[doc = "The set of operations allowed through this Role Definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<Permission>,
 }
 impl SqlRoleDefinitionResource {
@@ -6479,7 +6948,11 @@ impl SqlStoredProcedureGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlStoredProcedureListResult {
     #[doc = "List of storedProcedures and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlStoredProcedureGetResults>,
 }
 impl azure_core::Continuable for SqlStoredProcedureListResult {
@@ -6566,7 +7039,11 @@ impl SqlTriggerGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlTriggerListResult {
     #[doc = "List of triggers and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlTriggerGetResults>,
 }
 impl azure_core::Continuable for SqlTriggerListResult {
@@ -6747,7 +7224,11 @@ impl SqlUserDefinedFunctionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlUserDefinedFunctionListResult {
     #[doc = "List of userDefinedFunctions and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlUserDefinedFunctionGetResults>,
 }
 impl azure_core::Continuable for SqlUserDefinedFunctionListResult {
@@ -6836,7 +7317,11 @@ impl TableGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TableListResult {
     #[doc = "List of Table and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TableGetResults>,
 }
 impl azure_core::Continuable for TableListResult {
@@ -6962,7 +7447,11 @@ impl ThroughputSettingsUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UniqueKey {
     #[doc = "List of paths must be unique for each document in the Azure Cosmos DB service"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<Path>,
 }
 impl UniqueKey {
@@ -6974,7 +7463,12 @@ impl UniqueKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UniqueKeyPolicy {
     #[doc = "List of unique keys on that enforces uniqueness constraint on documents in the collection in the Azure Cosmos DB service."]
-    #[serde(rename = "uniqueKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "uniqueKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unique_keys: Vec<UniqueKey>,
 }
 impl UniqueKeyPolicy {
@@ -7057,7 +7551,11 @@ impl Usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsagesResult {
     #[doc = "The list of usages for the database. A usage is a point in time metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsagesResult {
diff --git a/services/mgmt/cosmosdb/src/package_preview_2022_02/models.rs b/services/mgmt/cosmosdb/src/package_preview_2022_02/models.rs
index cc5aae183a..dce222ee2a 100644
--- a/services/mgmt/cosmosdb/src/package_preview_2022_02/models.rs
+++ b/services/mgmt/cosmosdb/src/package_preview_2022_02/models.rs
@@ -223,7 +223,12 @@ pub struct AuthenticationMethodLdapProperties {
     #[doc = "Template to use for searching. Defaults to (cn=%s) where %s will be replaced by the username used to login."]
     #[serde(rename = "searchFilterTemplate", default, skip_serializing_if = "Option::is_none")]
     pub search_filter_template: Option<String>,
-    #[serde(rename = "serverCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_certificates: Vec<Certificate>,
 }
 impl AuthenticationMethodLdapProperties {
@@ -519,10 +524,20 @@ pub struct CassandraClusterPublicStatus {
     #[serde(rename = "reaperStatus", default, skip_serializing_if = "Option::is_none")]
     pub reaper_status: Option<ManagedCassandraReaperStatus>,
     #[doc = "List relevant information about any connection errors to the Datacenters."]
-    #[serde(rename = "connectionErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_errors: Vec<ConnectionError>,
     #[doc = "List of the status of each datacenter in this cluster."]
-    #[serde(rename = "dataCenters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataCenters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_centers: Vec<serde_json::Value>,
 }
 impl CassandraClusterPublicStatus {
@@ -591,7 +606,11 @@ impl CassandraKeyspaceGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraKeyspaceListResult {
     #[doc = "List of Cassandra keyspaces and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CassandraKeyspaceGetResults>,
 }
 impl azure_core::Continuable for CassandraKeyspaceListResult {
@@ -632,13 +651,27 @@ impl CassandraPartitionKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraSchema {
     #[doc = "List of Cassandra table columns."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<Column>,
     #[doc = "List of partition key."]
-    #[serde(rename = "partitionKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_keys: Vec<CassandraPartitionKey>,
     #[doc = "List of cluster key."]
-    #[serde(rename = "clusterKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_keys: Vec<ClusterKey>,
 }
 impl CassandraSchema {
@@ -707,7 +740,11 @@ impl CassandraTableGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraTableListResult {
     #[doc = "List of Cassandra tables and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CassandraTableGetResults>,
 }
 impl azure_core::Continuable for CassandraTableListResult {
@@ -807,7 +844,11 @@ impl CassandraViewGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraViewListResult {
     #[doc = "List of Cassandra views and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CassandraViewGetResults>,
 }
 impl azure_core::Continuable for CassandraViewListResult {
@@ -943,7 +984,11 @@ impl ClientEncryptionKeyResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientEncryptionKeysListResult {
     #[doc = "List of client encryption keys and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientEncryptionKeyGetResults>,
 }
 impl azure_core::Continuable for ClientEncryptionKeysListResult {
@@ -1054,19 +1099,44 @@ pub mod cluster_resource {
         #[serde(rename = "repairEnabled", default, skip_serializing_if = "Option::is_none")]
         pub repair_enabled: Option<bool>,
         #[doc = "List of TLS certificates used to authorize clients connecting to the cluster. All connections are TLS encrypted whether clientCertificates is set or not, but if clientCertificates is set, the managed Cassandra cluster will reject all connections not bearing a TLS client certificate that can be validated from one or more of the public certificates in this property."]
-        #[serde(rename = "clientCertificates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "clientCertificates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub client_certificates: Vec<Certificate>,
         #[doc = "List of TLS certificates used to authorize gossip from unmanaged data centers. The TLS certificates of all nodes in unmanaged data centers must be verifiable using one of the certificates provided in this property."]
-        #[serde(rename = "externalGossipCertificates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "externalGossipCertificates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub external_gossip_certificates: Vec<Certificate>,
         #[doc = "List of TLS certificates that unmanaged nodes must trust for gossip with managed nodes. All managed nodes will present TLS client certificates that are verifiable using one of the certificates provided in this property."]
-        #[serde(rename = "gossipCertificates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "gossipCertificates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub gossip_certificates: Vec<Certificate>,
         #[doc = "List of IP addresses of seed nodes in unmanaged data centers. These will be added to the seed node lists of all managed nodes."]
-        #[serde(rename = "externalSeedNodes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "externalSeedNodes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub external_seed_nodes: Vec<SeedNode>,
         #[doc = "List of IP addresses of seed nodes in the managed data centers. These should be added to the seed node lists of all unmanaged nodes."]
-        #[serde(rename = "seedNodes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "seedNodes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub seed_nodes: Vec<SeedNode>,
         #[doc = "Number of hours to wait between taking a backup of the cluster."]
         #[serde(rename = "hoursBetweenBackups", default, skip_serializing_if = "Option::is_none")]
@@ -1453,7 +1523,11 @@ pub mod consistency_policy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerPartitionKey {
     #[doc = "List of paths using which data within the container can be partitioned"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<Path>,
     #[doc = "Indicates the kind of algorithm used for partitioning. For MultiHash, multiple partition keys (upto three maximum) are supported for container create"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1779,7 +1853,12 @@ pub mod data_center_resource {
         #[serde(rename = "nodeCount", default, skip_serializing_if = "Option::is_none")]
         pub node_count: Option<i32>,
         #[doc = "IP addresses for seed nodes in this data center. This is for reference. Generally you will want to use the seedNodes property on the cluster, which aggregates the seed nodes from all data centers in the cluster."]
-        #[serde(rename = "seedNodes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "seedNodes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub seed_nodes: Vec<SeedNode>,
         #[doc = "A fragment of a cassandra.yaml configuration file to be included in the cassandra.yaml for all nodes in this data center. The fragment should be Base64 encoded, and only a subset of keys are allowed."]
         #[serde(rename = "base64EncodedCassandraYamlFragment", default, skip_serializing_if = "Option::is_none")]
@@ -1874,7 +1953,11 @@ pub mod data_transfer_data_source_sink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataTransferJobFeedResults {
     #[doc = "List of Data Transfer jobs and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataTransferJobGetResults>,
     #[doc = "URL to get the next set of Data Transfer job list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1978,7 +2061,11 @@ pub struct DataTransferServiceResourceProperties {
     #[serde(flatten)]
     pub service_resource_properties: ServiceResourceProperties,
     #[doc = "An array that contains all of the locations for the service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<DataTransferRegionalServiceResource>,
 }
 impl DataTransferServiceResourceProperties {
@@ -2098,10 +2185,19 @@ pub struct DatabaseAccountCreateUpdateProperties {
     #[serde(rename = "enableAutomaticFailover", default, skip_serializing_if = "Option::is_none")]
     pub enable_automatic_failover: Option<bool>,
     #[doc = "List of Cosmos DB capabilities for the account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
     #[doc = "List of Virtual Network ACL rules configured for the Cosmos DB account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "Enables the account to write in multiple locations"]
     #[serde(rename = "enableMultipleWriteLocations", default, skip_serializing_if = "Option::is_none")]
@@ -2142,13 +2238,22 @@ pub struct DatabaseAccountCreateUpdateProperties {
     #[serde(rename = "backupPolicy", default, skip_serializing_if = "Option::is_none")]
     pub backup_policy: Option<BackupPolicy>,
     #[doc = "The CORS policy for the Cosmos DB database account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors: Vec<CorsPolicy>,
     #[doc = "Indicates what services are allowed to bypass firewall checks."]
     #[serde(rename = "networkAclBypass", default, skip_serializing_if = "Option::is_none")]
     pub network_acl_bypass: Option<NetworkAclBypass>,
     #[doc = "An array that contains the Resource Ids for Network Acl Bypass for the Cosmos DB account."]
-    #[serde(rename = "networkAclBypassResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAclBypassResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_acl_bypass_resource_ids: Vec<String>,
     #[doc = "Indicates what diagnostic log settings are to be enabled."]
     #[serde(rename = "diagnosticLogSettings", default, skip_serializing_if = "Option::is_none")]
@@ -2226,25 +2331,58 @@ pub struct DatabaseAccountGetProperties {
     #[serde(rename = "consistencyPolicy", default, skip_serializing_if = "Option::is_none")]
     pub consistency_policy: Option<ConsistencyPolicy>,
     #[doc = "List of Cosmos DB capabilities for the account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
     #[doc = "An array that contains the write location for the Cosmos DB account."]
-    #[serde(rename = "writeLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "writeLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub write_locations: Vec<Location>,
     #[doc = "An array that contains of the read locations enabled for the Cosmos DB account."]
-    #[serde(rename = "readLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "readLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub read_locations: Vec<Location>,
     #[doc = "An array that contains all of the locations enabled for the Cosmos DB account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<Location>,
     #[doc = "An array that contains the regions ordered by their failover priorities."]
-    #[serde(rename = "failoverPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "failoverPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub failover_policies: Vec<FailoverPolicy>,
     #[doc = "List of Virtual Network ACL rules configured for the Cosmos DB account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "List of Private Endpoint Connections configured for the Cosmos DB account."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Enables the account to write in multiple locations"]
     #[serde(rename = "enableMultipleWriteLocations", default, skip_serializing_if = "Option::is_none")]
@@ -2291,13 +2429,22 @@ pub struct DatabaseAccountGetProperties {
     #[serde(rename = "backupPolicy", default, skip_serializing_if = "Option::is_none")]
     pub backup_policy: Option<BackupPolicy>,
     #[doc = "The CORS policy for the Cosmos DB database account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors: Vec<CorsPolicy>,
     #[doc = "Indicates what services are allowed to bypass firewall checks."]
     #[serde(rename = "networkAclBypass", default, skip_serializing_if = "Option::is_none")]
     pub network_acl_bypass: Option<NetworkAclBypass>,
     #[doc = "An array that contains the Resource Ids for Network Acl Bypass for the Cosmos DB account."]
-    #[serde(rename = "networkAclBypassResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAclBypassResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_acl_bypass_resource_ids: Vec<String>,
     #[doc = "Indicates what diagnostic log settings are to be enabled."]
     #[serde(rename = "diagnosticLogSettings", default, skip_serializing_if = "Option::is_none")]
@@ -2393,7 +2540,12 @@ pub mod database_account_get_results {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseAccountListConnectionStringsResult {
     #[doc = "An array that contains the connection strings for the Cosmos DB account."]
-    #[serde(rename = "connectionStrings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionStrings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_strings: Vec<DatabaseAccountConnectionString>,
 }
 impl DatabaseAccountListConnectionStringsResult {
@@ -2526,7 +2678,11 @@ pub struct DatabaseAccountUpdateProperties {
     #[serde(rename = "consistencyPolicy", default, skip_serializing_if = "Option::is_none")]
     pub consistency_policy: Option<ConsistencyPolicy>,
     #[doc = "An array that contains the georeplication locations enabled for the Cosmos DB account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<Location>,
     #[doc = "Array of IpAddressOrRange objects."]
     #[serde(rename = "ipRules", default, skip_serializing_if = "Option::is_none")]
@@ -2538,10 +2694,19 @@ pub struct DatabaseAccountUpdateProperties {
     #[serde(rename = "enableAutomaticFailover", default, skip_serializing_if = "Option::is_none")]
     pub enable_automatic_failover: Option<bool>,
     #[doc = "List of Cosmos DB capabilities for the account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
     #[doc = "List of Virtual Network ACL rules configured for the Cosmos DB account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "Enables the account to write in multiple locations"]
     #[serde(rename = "enableMultipleWriteLocations", default, skip_serializing_if = "Option::is_none")]
@@ -2579,13 +2744,22 @@ pub struct DatabaseAccountUpdateProperties {
     #[serde(rename = "backupPolicy", default, skip_serializing_if = "Option::is_none")]
     pub backup_policy: Option<BackupPolicy>,
     #[doc = "The CORS policy for the Cosmos DB database account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors: Vec<CorsPolicy>,
     #[doc = "Indicates what services are allowed to bypass firewall checks."]
     #[serde(rename = "networkAclBypass", default, skip_serializing_if = "Option::is_none")]
     pub network_acl_bypass: Option<NetworkAclBypass>,
     #[doc = "An array that contains the Resource Ids for Network Acl Bypass for the Cosmos DB account."]
-    #[serde(rename = "networkAclBypassResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAclBypassResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_acl_bypass_resource_ids: Vec<String>,
     #[doc = "Indicates what diagnostic log settings are to be enabled."]
     #[serde(rename = "diagnosticLogSettings", default, skip_serializing_if = "Option::is_none")]
@@ -2609,7 +2783,11 @@ impl DatabaseAccountUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseAccountsListResult {
     #[doc = "List of database account and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseAccountGetResults>,
 }
 impl azure_core::Continuable for DatabaseAccountsListResult {
@@ -2630,7 +2808,12 @@ pub struct DatabaseRestoreResource {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "The names of the collections available for restore."]
-    #[serde(rename = "collectionNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectionNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collection_names: Vec<CollectionName>,
 }
 impl DatabaseRestoreResource {
@@ -2775,7 +2958,11 @@ pub struct GraphApiComputeServiceResourceProperties {
     #[serde(rename = "graphApiComputeEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub graph_api_compute_endpoint: Option<String>,
     #[doc = "An array that contains all of the locations for the service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<GraphApiComputeRegionalServiceResource>,
 }
 impl GraphApiComputeServiceResourceProperties {
@@ -2860,7 +3047,11 @@ impl GraphResourceGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GraphResourcesListResult {
     #[doc = "List of Graph resource and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GraphResourceGetResults>,
 }
 impl azure_core::Continuable for GraphResourcesListResult {
@@ -2935,7 +3126,11 @@ impl GremlinDatabaseGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GremlinDatabaseListResult {
     #[doc = "List of Gremlin databases and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GremlinDatabaseGetResults>,
 }
 impl azure_core::Continuable for GremlinDatabaseListResult {
@@ -2967,7 +3162,12 @@ pub struct GremlinDatabaseRestoreResource {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "The names of the graphs available for restore."]
-    #[serde(rename = "graphNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "graphNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub graph_names: Vec<GraphName>,
 }
 impl GremlinDatabaseRestoreResource {
@@ -3036,7 +3236,11 @@ impl GremlinGraphGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GremlinGraphListResult {
     #[doc = "List of graphs and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GremlinGraphGetResults>,
 }
 impl azure_core::Continuable for GremlinGraphListResult {
@@ -3091,7 +3295,11 @@ pub struct IncludedPath {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "List of indexes for this path"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub indexes: Vec<Indexes>,
 }
 impl IncludedPath {
@@ -3224,16 +3432,36 @@ pub struct IndexingPolicy {
     #[serde(rename = "indexingMode", default, skip_serializing_if = "Option::is_none")]
     pub indexing_mode: Option<indexing_policy::IndexingMode>,
     #[doc = "List of paths to include in the indexing"]
-    #[serde(rename = "includedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_paths: Vec<IncludedPath>,
     #[doc = "List of paths to exclude from indexing"]
-    #[serde(rename = "excludedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_paths: Vec<ExcludedPath>,
     #[doc = "List of composite path list"]
-    #[serde(rename = "compositeIndexes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "compositeIndexes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub composite_indexes: Vec<CompositePathList>,
     #[doc = "List of spatial specifics"]
-    #[serde(rename = "spatialIndexes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "spatialIndexes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub spatial_indexes: Vec<SpatialSpec>,
 }
 impl IndexingPolicy {
@@ -3329,7 +3557,11 @@ impl KeyWrapMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListBackups {
     #[doc = "Container for array of backups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupResource>,
 }
 impl azure_core::Continuable for ListBackups {
@@ -3347,7 +3579,11 @@ impl ListBackups {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListClusters {
     #[doc = "Container for the array of clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClusterResource>,
 }
 impl azure_core::Continuable for ListClusters {
@@ -3365,7 +3601,11 @@ impl ListClusters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListDataCenters {
     #[doc = "Container for array of data centers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataCenterResource>,
 }
 impl azure_core::Continuable for ListDataCenters {
@@ -3424,7 +3664,11 @@ impl LocationGetResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocationListResult {
     #[doc = "List of Cosmos DB locations and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LocationGetResult>,
 }
 impl azure_core::Continuable for LocationListResult {
@@ -3451,7 +3695,12 @@ pub struct LocationProperties {
     #[serde(rename = "isResidencyRestricted", default, skip_serializing_if = "Option::is_none")]
     pub is_residency_restricted: Option<bool>,
     #[doc = "The properties of available backup storage redundancies."]
-    #[serde(rename = "backupStorageRedundancies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupStorageRedundancies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_storage_redundancies: Vec<BackupStorageRedundancy>,
 }
 impl LocationProperties {
@@ -3745,7 +3994,11 @@ pub struct MaterializedViewsBuilderServiceResourceProperties {
     #[serde(flatten)]
     pub service_resource_properties: ServiceResourceProperties,
     #[doc = "An array that contains all of the locations for the service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<MaterializedViewsBuilderRegionalServiceResource>,
 }
 impl MaterializedViewsBuilderServiceResourceProperties {
@@ -3787,7 +4040,12 @@ pub struct Metric {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<MetricName>,
     #[doc = "The metric values for the specified time window and timestep."]
-    #[serde(rename = "metricValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_values: Vec<MetricValue>,
 }
 impl Metric {
@@ -3814,7 +4072,12 @@ impl MetricAvailability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricDefinition {
     #[doc = "The list of metric availabilities for the account."]
-    #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricAvailabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_availabilities: Vec<MetricAvailability>,
     #[doc = "The primary aggregation type of the metric."]
     #[serde(rename = "primaryAggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -3886,7 +4149,11 @@ pub mod metric_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricDefinitionsListResult {
     #[doc = "The list of metric definitions for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetricDefinition>,
 }
 impl azure_core::Continuable for MetricDefinitionsListResult {
@@ -3904,7 +4171,11 @@ impl MetricDefinitionsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricListResult {
     #[doc = "The list of metrics for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Metric>,
 }
 impl azure_core::Continuable for MetricListResult {
@@ -4021,7 +4292,11 @@ impl MongoDbCollectionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoDbCollectionListResult {
     #[doc = "List of MongoDB collections and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoDbCollectionGetResults>,
 }
 impl azure_core::Continuable for MongoDbCollectionListResult {
@@ -4044,7 +4319,11 @@ pub struct MongoDbCollectionResource {
     #[serde(rename = "shardKey", default, skip_serializing_if = "Option::is_none")]
     pub shard_key: Option<ShardKeys>,
     #[doc = "List of index keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub indexes: Vec<MongoIndex>,
     #[doc = "Analytical TTL."]
     #[serde(rename = "analyticalStorageTtl", default, skip_serializing_if = "Option::is_none")]
@@ -4121,7 +4400,11 @@ impl MongoDbDatabaseGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoDbDatabaseListResult {
     #[doc = "List of MongoDB databases and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoDbDatabaseGetResults>,
 }
 impl azure_core::Continuable for MongoDbDatabaseListResult {
@@ -4165,7 +4448,11 @@ impl MongoIndex {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoIndexKeys {
     #[doc = "List of keys for each MongoDB collection in the Azure Cosmos DB service"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<Key>,
 }
 impl MongoIndexKeys {
@@ -4218,7 +4505,11 @@ impl MongoRoleDefinitionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoRoleDefinitionListResult {
     #[doc = "List of Mongo Role Definitions and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoRoleDefinitionGetResults>,
 }
 impl azure_core::Continuable for MongoRoleDefinitionListResult {
@@ -4245,10 +4536,18 @@ pub struct MongoRoleDefinitionResource {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "A set of privileges contained by the Role Definition. This will allow application of this Role Definition on the entire database account or any underlying Database / Collection. Scopes higher than Database are not enforceable as privilege."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub privileges: Vec<Privilege>,
     #[doc = "The set of roles inherited by this Role Definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<Role>,
 }
 impl MongoRoleDefinitionResource {
@@ -4295,7 +4594,11 @@ impl MongoUserDefinitionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoUserDefinitionListResult {
     #[doc = "List of User Definition and their properties"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoUserDefinitionGetResults>,
 }
 impl azure_core::Continuable for MongoUserDefinitionListResult {
@@ -4325,7 +4628,11 @@ pub struct MongoUserDefinitionResource {
     #[serde(rename = "customData", default, skip_serializing_if = "Option::is_none")]
     pub custom_data: Option<String>,
     #[doc = "The set of roles inherited by the User Definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<Role>,
     #[doc = "The Mongo Auth mechanism. For now, we only support auth mechanism SCRAM-SHA-256."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4386,7 +4693,11 @@ impl NotebookWorkspaceCreateUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotebookWorkspaceListResult {
     #[doc = "Array of notebook workspace resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotebookWorkspace>,
 }
 impl azure_core::Continuable for NotebookWorkspaceListResult {
@@ -4458,7 +4769,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Resource Provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4551,7 +4866,11 @@ impl PartitionMetric {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartitionMetricListResult {
     #[doc = "The list of partition-level metrics for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartitionMetric>,
 }
 impl azure_core::Continuable for PartitionMetricListResult {
@@ -4586,7 +4905,11 @@ impl PartitionUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartitionUsagesResult {
     #[doc = "The list of partition-level usages for the database. A usage is a point in time metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartitionUsage>,
 }
 impl azure_core::Continuable for PartitionUsagesResult {
@@ -4620,7 +4943,12 @@ pub struct PercentileMetric {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<MetricName>,
     #[doc = "The percentile metric values for the specified time window and timestep."]
-    #[serde(rename = "metricValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_values: Vec<PercentileMetricValue>,
 }
 impl PercentileMetric {
@@ -4632,7 +4960,11 @@ impl PercentileMetric {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PercentileMetricListResult {
     #[doc = "The list of percentile metrics for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PercentileMetric>,
 }
 impl azure_core::Continuable for PercentileMetricListResult {
@@ -4717,10 +5049,20 @@ impl PeriodicModeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permission {
     #[doc = "An array of data actions that are allowed."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<String>,
     #[doc = "An array of data actions that are denied."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<String>,
 }
 impl Permission {
@@ -4743,7 +5085,12 @@ impl PhysicalPartitionId {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PhysicalPartitionStorageInfoCollection {
     #[doc = "List of physical partitions and their properties."]
-    #[serde(rename = "physicalPartitionStorageInfoCollection", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "physicalPartitionStorageInfoCollection",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub physical_partition_storage_info_collection: Vec<PhysicalPartitionStorageInfo>,
 }
 impl PhysicalPartitionStorageInfoCollection {
@@ -4755,7 +5102,12 @@ impl PhysicalPartitionStorageInfoCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PhysicalPartitionThroughputInfoProperties {
     #[doc = "Array of physical partition throughput info objects"]
-    #[serde(rename = "physicalPartitionThroughputInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "physicalPartitionThroughputInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub physical_partition_throughput_info: Vec<PhysicalPartitionThroughputInfoResource>,
 }
 impl PhysicalPartitionThroughputInfoProperties {
@@ -4821,7 +5173,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -4886,7 +5242,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -4907,10 +5267,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource required zone names."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -4943,7 +5313,11 @@ pub struct Privilege {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub resource: Option<privilege::Resource>,
     #[doc = "An array of actions that are allowed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
 }
 impl Privilege {
@@ -5206,7 +5580,12 @@ pub struct RestorableDatabaseAccountProperties {
     #[serde(rename = "apiType", default, skip_serializing_if = "Option::is_none")]
     pub api_type: Option<ApiType>,
     #[doc = "List of regions where the of the database account can be restored from."]
-    #[serde(rename = "restorableLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restorableLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restorable_locations: Vec<RestorableLocationResource>,
 }
 impl RestorableDatabaseAccountProperties {
@@ -5218,7 +5597,11 @@ impl RestorableDatabaseAccountProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableDatabaseAccountsListResult {
     #[doc = "List of restorable database accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableDatabaseAccountGetResult>,
 }
 impl azure_core::Continuable for RestorableDatabaseAccountsListResult {
@@ -5296,7 +5679,11 @@ pub mod restorable_gremlin_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableGremlinDatabasesListResult {
     #[doc = "List of Gremlin database events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableGremlinDatabaseGetResult>,
 }
 impl azure_core::Continuable for RestorableGremlinDatabasesListResult {
@@ -5374,7 +5761,11 @@ pub mod restorable_gremlin_graph_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableGremlinGraphsListResult {
     #[doc = "List of Gremlin graph events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableGremlinGraphGetResult>,
 }
 impl azure_core::Continuable for RestorableGremlinGraphsListResult {
@@ -5392,7 +5783,11 @@ impl RestorableGremlinGraphsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableGremlinResourcesListResult {
     #[doc = "List of restorable Gremlin resources, including the gremlin database and graph names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GremlinDatabaseRestoreResource>,
 }
 impl azure_core::Continuable for RestorableGremlinResourcesListResult {
@@ -5491,7 +5886,11 @@ pub mod restorable_mongodb_collection_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableMongodbCollectionsListResult {
     #[doc = "List of MongoDB collection events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableMongodbCollectionGetResult>,
 }
 impl azure_core::Continuable for RestorableMongodbCollectionsListResult {
@@ -5569,7 +5968,11 @@ pub mod restorable_mongodb_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableMongodbDatabasesListResult {
     #[doc = "List of MongoDB database events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableMongodbDatabaseGetResult>,
 }
 impl azure_core::Continuable for RestorableMongodbDatabasesListResult {
@@ -5587,7 +5990,11 @@ impl RestorableMongodbDatabasesListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableMongodbResourcesListResult {
     #[doc = "List of restorable MongoDB resources, including the database and collection names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseRestoreResource>,
 }
 impl azure_core::Continuable for RestorableMongodbResourcesListResult {
@@ -5691,7 +6098,11 @@ pub mod restorable_sql_container_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableSqlContainersListResult {
     #[doc = "List of SQL container events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableSqlContainerGetResult>,
 }
 impl azure_core::Continuable for RestorableSqlContainersListResult {
@@ -5803,7 +6214,11 @@ pub mod restorable_sql_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableSqlDatabasesListResult {
     #[doc = "List of SQL database events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableSqlDatabaseGetResult>,
 }
 impl azure_core::Continuable for RestorableSqlDatabasesListResult {
@@ -5821,7 +6236,11 @@ impl RestorableSqlDatabasesListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableSqlResourcesListResult {
     #[doc = "List of restorable SQL resources, including the database and collection names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseRestoreResource>,
 }
 impl azure_core::Continuable for RestorableSqlResourcesListResult {
@@ -5899,7 +6318,11 @@ pub mod restorable_table_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableTableResourcesListResult {
     #[doc = "List of restorable table names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TableName>,
 }
 impl azure_core::Continuable for RestorableTableResourcesListResult {
@@ -5917,7 +6340,11 @@ impl RestorableTableResourcesListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableTablesListResult {
     #[doc = "List of Table events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableTableGetResult>,
 }
 impl azure_core::Continuable for RestorableTablesListResult {
@@ -5944,13 +6371,28 @@ pub struct RestoreParameters {
     #[serde(rename = "restoreTimestampInUtc", default, with = "azure_core::date::rfc3339::option")]
     pub restore_timestamp_in_utc: Option<time::OffsetDateTime>,
     #[doc = "List of specific databases available for restore."]
-    #[serde(rename = "databasesToRestore", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databasesToRestore",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases_to_restore: Vec<DatabaseRestoreResource>,
     #[doc = "List of specific gremlin databases available for restore."]
-    #[serde(rename = "gremlinDatabasesToRestore", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gremlinDatabasesToRestore",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gremlin_databases_to_restore: Vec<GremlinDatabaseRestoreResource>,
     #[doc = "List of specific tables available for restore."]
-    #[serde(rename = "tablesToRestore", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tablesToRestore",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables_to_restore: Vec<TableName>,
 }
 impl RestoreParameters {
@@ -6151,7 +6593,11 @@ impl Serialize for ServiceResourceInstanceSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceResourceListResult {
     #[doc = "List of Service Resource and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResource>,
 }
 impl azure_core::Continuable for ServiceResourceListResult {
@@ -6296,7 +6742,11 @@ pub struct SpatialSpec {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "List of path's spatial type"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub types: Vec<SpatialType>,
 }
 impl SpatialSpec {
@@ -6406,7 +6856,11 @@ impl SqlContainerGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlContainerListResult {
     #[doc = "List of containers and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlContainerGetResults>,
 }
 impl azure_core::Continuable for SqlContainerListResult {
@@ -6548,7 +7002,11 @@ impl SqlDatabaseGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlDatabaseListResult {
     #[doc = "List of SQL databases and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlDatabaseGetResults>,
 }
 impl azure_core::Continuable for SqlDatabaseListResult {
@@ -6608,7 +7066,11 @@ pub struct SqlDedicatedGatewayServiceResourceProperties {
     #[serde(rename = "sqlDedicatedGatewayEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub sql_dedicated_gateway_endpoint: Option<String>,
     #[doc = "An array that contains all of the locations for the service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<SqlDedicatedGatewayRegionalServiceResource>,
 }
 impl SqlDedicatedGatewayServiceResourceProperties {
@@ -6650,7 +7112,11 @@ impl SqlRoleAssignmentGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlRoleAssignmentListResult {
     #[doc = "List of Role Assignments and their properties"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlRoleAssignmentGetResults>,
 }
 impl azure_core::Continuable for SqlRoleAssignmentListResult {
@@ -6712,7 +7178,11 @@ impl SqlRoleDefinitionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlRoleDefinitionListResult {
     #[doc = "List of Role Definitions and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlRoleDefinitionGetResults>,
 }
 impl azure_core::Continuable for SqlRoleDefinitionListResult {
@@ -6736,10 +7206,19 @@ pub struct SqlRoleDefinitionResource {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<sql_role_definition_resource::Type>,
     #[doc = "A set of fully qualified Scopes at or below which Role Assignments may be created using this Role Definition. This will allow application of this Role Definition on the entire database account or any underlying Database / Collection. Must have at least one element. Scopes higher than Database account are not enforceable as assignable Scopes. Note that resources referenced in assignable Scopes need not exist."]
-    #[serde(rename = "assignableScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assignableScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assignable_scopes: Vec<String>,
     #[doc = "The set of operations allowed through this Role Definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<Permission>,
 }
 impl SqlRoleDefinitionResource {
@@ -6815,7 +7294,11 @@ impl SqlStoredProcedureGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlStoredProcedureListResult {
     #[doc = "List of storedProcedures and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlStoredProcedureGetResults>,
 }
 impl azure_core::Continuable for SqlStoredProcedureListResult {
@@ -6902,7 +7385,11 @@ impl SqlTriggerGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlTriggerListResult {
     #[doc = "List of triggers and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlTriggerGetResults>,
 }
 impl azure_core::Continuable for SqlTriggerListResult {
@@ -7083,7 +7570,11 @@ impl SqlUserDefinedFunctionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlUserDefinedFunctionListResult {
     #[doc = "List of userDefinedFunctions and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlUserDefinedFunctionGetResults>,
 }
 impl azure_core::Continuable for SqlUserDefinedFunctionListResult {
@@ -7172,7 +7663,11 @@ impl TableGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TableListResult {
     #[doc = "List of Table and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TableGetResults>,
 }
 impl azure_core::Continuable for TableListResult {
@@ -7298,7 +7793,11 @@ impl ThroughputSettingsUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UniqueKey {
     #[doc = "List of paths must be unique for each document in the Azure Cosmos DB service"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<Path>,
 }
 impl UniqueKey {
@@ -7310,7 +7809,12 @@ impl UniqueKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UniqueKeyPolicy {
     #[doc = "List of unique keys on that enforces uniqueness constraint on documents in the collection in the Azure Cosmos DB service."]
-    #[serde(rename = "uniqueKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "uniqueKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unique_keys: Vec<UniqueKey>,
 }
 impl UniqueKeyPolicy {
@@ -7393,7 +7897,11 @@ impl Usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsagesResult {
     #[doc = "The list of usages for the database. A usage is a point in time metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsagesResult {
diff --git a/services/mgmt/cosmosdb/src/package_preview_2022_05/models.rs b/services/mgmt/cosmosdb/src/package_preview_2022_05/models.rs
index 9a92fe2721..20122a730c 100644
--- a/services/mgmt/cosmosdb/src/package_preview_2022_05/models.rs
+++ b/services/mgmt/cosmosdb/src/package_preview_2022_05/models.rs
@@ -235,7 +235,12 @@ pub struct AuthenticationMethodLdapProperties {
     #[doc = "Template to use for searching. Defaults to (cn=%s) where %s will be replaced by the username used to login."]
     #[serde(rename = "searchFilterTemplate", default, skip_serializing_if = "Option::is_none")]
     pub search_filter_template: Option<String>,
-    #[serde(rename = "serverCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_certificates: Vec<Certificate>,
 }
 impl AuthenticationMethodLdapProperties {
@@ -531,10 +536,20 @@ pub struct CassandraClusterPublicStatus {
     #[serde(rename = "reaperStatus", default, skip_serializing_if = "Option::is_none")]
     pub reaper_status: Option<ManagedCassandraReaperStatus>,
     #[doc = "List relevant information about any connection errors to the Datacenters."]
-    #[serde(rename = "connectionErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_errors: Vec<ConnectionError>,
     #[doc = "List of the status of each datacenter in this cluster."]
-    #[serde(rename = "dataCenters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataCenters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_centers: Vec<serde_json::Value>,
 }
 impl CassandraClusterPublicStatus {
@@ -603,7 +618,11 @@ impl CassandraKeyspaceGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraKeyspaceListResult {
     #[doc = "List of Cassandra keyspaces and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CassandraKeyspaceGetResults>,
 }
 impl azure_core::Continuable for CassandraKeyspaceListResult {
@@ -644,13 +663,27 @@ impl CassandraPartitionKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraSchema {
     #[doc = "List of Cassandra table columns."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<Column>,
     #[doc = "List of partition key."]
-    #[serde(rename = "partitionKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_keys: Vec<CassandraPartitionKey>,
     #[doc = "List of cluster key."]
-    #[serde(rename = "clusterKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_keys: Vec<ClusterKey>,
 }
 impl CassandraSchema {
@@ -719,7 +752,11 @@ impl CassandraTableGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraTableListResult {
     #[doc = "List of Cassandra tables and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CassandraTableGetResults>,
 }
 impl azure_core::Continuable for CassandraTableListResult {
@@ -819,7 +856,11 @@ impl CassandraViewGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CassandraViewListResult {
     #[doc = "List of Cassandra views and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CassandraViewGetResults>,
 }
 impl azure_core::Continuable for CassandraViewListResult {
@@ -955,7 +996,11 @@ impl ClientEncryptionKeyResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientEncryptionKeysListResult {
     #[doc = "List of client encryption keys and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientEncryptionKeyGetResults>,
 }
 impl azure_core::Continuable for ClientEncryptionKeysListResult {
@@ -1066,19 +1111,44 @@ pub mod cluster_resource {
         #[serde(rename = "repairEnabled", default, skip_serializing_if = "Option::is_none")]
         pub repair_enabled: Option<bool>,
         #[doc = "List of TLS certificates used to authorize clients connecting to the cluster. All connections are TLS encrypted whether clientCertificates is set or not, but if clientCertificates is set, the managed Cassandra cluster will reject all connections not bearing a TLS client certificate that can be validated from one or more of the public certificates in this property."]
-        #[serde(rename = "clientCertificates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "clientCertificates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub client_certificates: Vec<Certificate>,
         #[doc = "List of TLS certificates used to authorize gossip from unmanaged data centers. The TLS certificates of all nodes in unmanaged data centers must be verifiable using one of the certificates provided in this property."]
-        #[serde(rename = "externalGossipCertificates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "externalGossipCertificates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub external_gossip_certificates: Vec<Certificate>,
         #[doc = "List of TLS certificates that unmanaged nodes must trust for gossip with managed nodes. All managed nodes will present TLS client certificates that are verifiable using one of the certificates provided in this property."]
-        #[serde(rename = "gossipCertificates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "gossipCertificates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub gossip_certificates: Vec<Certificate>,
         #[doc = "List of IP addresses of seed nodes in unmanaged data centers. These will be added to the seed node lists of all managed nodes."]
-        #[serde(rename = "externalSeedNodes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "externalSeedNodes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub external_seed_nodes: Vec<SeedNode>,
         #[doc = "List of IP addresses of seed nodes in the managed data centers. These should be added to the seed node lists of all unmanaged nodes."]
-        #[serde(rename = "seedNodes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "seedNodes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub seed_nodes: Vec<SeedNode>,
         #[doc = "Number of hours to wait between taking a backup of the cluster."]
         #[serde(rename = "hoursBetweenBackups", default, skip_serializing_if = "Option::is_none")]
@@ -1465,7 +1535,11 @@ pub mod consistency_policy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerPartitionKey {
     #[doc = "List of paths using which data within the container can be partitioned"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<Path>,
     #[doc = "Indicates the kind of algorithm used for partitioning. For MultiHash, multiple partition keys (upto three maximum) are supported for container create"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1791,7 +1865,12 @@ pub mod data_center_resource {
         #[serde(rename = "nodeCount", default, skip_serializing_if = "Option::is_none")]
         pub node_count: Option<i32>,
         #[doc = "IP addresses for seed nodes in this data center. This is for reference. Generally you will want to use the seedNodes property on the cluster, which aggregates the seed nodes from all data centers in the cluster."]
-        #[serde(rename = "seedNodes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "seedNodes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub seed_nodes: Vec<SeedNode>,
         #[doc = "A fragment of a cassandra.yaml configuration file to be included in the cassandra.yaml for all nodes in this data center. The fragment should be Base64 encoded, and only a subset of keys are allowed."]
         #[serde(rename = "base64EncodedCassandraYamlFragment", default, skip_serializing_if = "Option::is_none")]
@@ -1886,7 +1965,11 @@ pub mod data_transfer_data_source_sink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataTransferJobFeedResults {
     #[doc = "List of Data Transfer jobs and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataTransferJobGetResults>,
     #[doc = "URL to get the next set of Data Transfer job list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1990,7 +2073,11 @@ pub struct DataTransferServiceResourceProperties {
     #[serde(flatten)]
     pub service_resource_properties: ServiceResourceProperties,
     #[doc = "An array that contains all of the locations for the service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<DataTransferRegionalServiceResource>,
 }
 impl DataTransferServiceResourceProperties {
@@ -2110,10 +2197,19 @@ pub struct DatabaseAccountCreateUpdateProperties {
     #[serde(rename = "enableAutomaticFailover", default, skip_serializing_if = "Option::is_none")]
     pub enable_automatic_failover: Option<bool>,
     #[doc = "List of Cosmos DB capabilities for the account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
     #[doc = "List of Virtual Network ACL rules configured for the Cosmos DB account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "Enables the account to write in multiple locations"]
     #[serde(rename = "enableMultipleWriteLocations", default, skip_serializing_if = "Option::is_none")]
@@ -2154,13 +2250,22 @@ pub struct DatabaseAccountCreateUpdateProperties {
     #[serde(rename = "backupPolicy", default, skip_serializing_if = "Option::is_none")]
     pub backup_policy: Option<BackupPolicy>,
     #[doc = "The CORS policy for the Cosmos DB database account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors: Vec<CorsPolicy>,
     #[doc = "Indicates what services are allowed to bypass firewall checks."]
     #[serde(rename = "networkAclBypass", default, skip_serializing_if = "Option::is_none")]
     pub network_acl_bypass: Option<NetworkAclBypass>,
     #[doc = "An array that contains the Resource Ids for Network Acl Bypass for the Cosmos DB account."]
-    #[serde(rename = "networkAclBypassResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAclBypassResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_acl_bypass_resource_ids: Vec<String>,
     #[doc = "Indicates what diagnostic log settings are to be enabled."]
     #[serde(rename = "diagnosticLogSettings", default, skip_serializing_if = "Option::is_none")]
@@ -2242,25 +2347,58 @@ pub struct DatabaseAccountGetProperties {
     #[serde(rename = "consistencyPolicy", default, skip_serializing_if = "Option::is_none")]
     pub consistency_policy: Option<ConsistencyPolicy>,
     #[doc = "List of Cosmos DB capabilities for the account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
     #[doc = "An array that contains the write location for the Cosmos DB account."]
-    #[serde(rename = "writeLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "writeLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub write_locations: Vec<Location>,
     #[doc = "An array that contains of the read locations enabled for the Cosmos DB account."]
-    #[serde(rename = "readLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "readLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub read_locations: Vec<Location>,
     #[doc = "An array that contains all of the locations enabled for the Cosmos DB account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<Location>,
     #[doc = "An array that contains the regions ordered by their failover priorities."]
-    #[serde(rename = "failoverPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "failoverPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub failover_policies: Vec<FailoverPolicy>,
     #[doc = "List of Virtual Network ACL rules configured for the Cosmos DB account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "List of Private Endpoint Connections configured for the Cosmos DB account."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Enables the account to write in multiple locations"]
     #[serde(rename = "enableMultipleWriteLocations", default, skip_serializing_if = "Option::is_none")]
@@ -2307,13 +2445,22 @@ pub struct DatabaseAccountGetProperties {
     #[serde(rename = "backupPolicy", default, skip_serializing_if = "Option::is_none")]
     pub backup_policy: Option<BackupPolicy>,
     #[doc = "The CORS policy for the Cosmos DB database account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors: Vec<CorsPolicy>,
     #[doc = "Indicates what services are allowed to bypass firewall checks."]
     #[serde(rename = "networkAclBypass", default, skip_serializing_if = "Option::is_none")]
     pub network_acl_bypass: Option<NetworkAclBypass>,
     #[doc = "An array that contains the Resource Ids for Network Acl Bypass for the Cosmos DB account."]
-    #[serde(rename = "networkAclBypassResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAclBypassResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_acl_bypass_resource_ids: Vec<String>,
     #[doc = "Indicates what diagnostic log settings are to be enabled."]
     #[serde(rename = "diagnosticLogSettings", default, skip_serializing_if = "Option::is_none")]
@@ -2433,7 +2580,12 @@ impl DatabaseAccountKeysMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseAccountListConnectionStringsResult {
     #[doc = "An array that contains the connection strings for the Cosmos DB account."]
-    #[serde(rename = "connectionStrings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionStrings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_strings: Vec<DatabaseAccountConnectionString>,
 }
 impl DatabaseAccountListConnectionStringsResult {
@@ -2566,7 +2718,11 @@ pub struct DatabaseAccountUpdateProperties {
     #[serde(rename = "consistencyPolicy", default, skip_serializing_if = "Option::is_none")]
     pub consistency_policy: Option<ConsistencyPolicy>,
     #[doc = "An array that contains the georeplication locations enabled for the Cosmos DB account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<Location>,
     #[doc = "Array of IpAddressOrRange objects."]
     #[serde(rename = "ipRules", default, skip_serializing_if = "Option::is_none")]
@@ -2578,10 +2734,19 @@ pub struct DatabaseAccountUpdateProperties {
     #[serde(rename = "enableAutomaticFailover", default, skip_serializing_if = "Option::is_none")]
     pub enable_automatic_failover: Option<bool>,
     #[doc = "List of Cosmos DB capabilities for the account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
     #[doc = "List of Virtual Network ACL rules configured for the Cosmos DB account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "Enables the account to write in multiple locations"]
     #[serde(rename = "enableMultipleWriteLocations", default, skip_serializing_if = "Option::is_none")]
@@ -2619,13 +2784,22 @@ pub struct DatabaseAccountUpdateProperties {
     #[serde(rename = "backupPolicy", default, skip_serializing_if = "Option::is_none")]
     pub backup_policy: Option<BackupPolicy>,
     #[doc = "The CORS policy for the Cosmos DB database account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors: Vec<CorsPolicy>,
     #[doc = "Indicates what services are allowed to bypass firewall checks."]
     #[serde(rename = "networkAclBypass", default, skip_serializing_if = "Option::is_none")]
     pub network_acl_bypass: Option<NetworkAclBypass>,
     #[doc = "An array that contains the Resource Ids for Network Acl Bypass for the Cosmos DB account."]
-    #[serde(rename = "networkAclBypassResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAclBypassResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_acl_bypass_resource_ids: Vec<String>,
     #[doc = "Indicates what diagnostic log settings are to be enabled."]
     #[serde(rename = "diagnosticLogSettings", default, skip_serializing_if = "Option::is_none")]
@@ -2652,7 +2826,11 @@ impl DatabaseAccountUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseAccountsListResult {
     #[doc = "List of database account and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseAccountGetResults>,
 }
 impl azure_core::Continuable for DatabaseAccountsListResult {
@@ -2673,7 +2851,12 @@ pub struct DatabaseRestoreResource {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "The names of the collections available for restore."]
-    #[serde(rename = "collectionNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectionNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collection_names: Vec<CollectionName>,
 }
 impl DatabaseRestoreResource {
@@ -2818,7 +3001,11 @@ pub struct GraphApiComputeServiceResourceProperties {
     #[serde(rename = "graphApiComputeEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub graph_api_compute_endpoint: Option<String>,
     #[doc = "An array that contains all of the locations for the service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<GraphApiComputeRegionalServiceResource>,
 }
 impl GraphApiComputeServiceResourceProperties {
@@ -2903,7 +3090,11 @@ impl GraphResourceGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GraphResourcesListResult {
     #[doc = "List of Graph resource and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GraphResourceGetResults>,
 }
 impl azure_core::Continuable for GraphResourcesListResult {
@@ -2978,7 +3169,11 @@ impl GremlinDatabaseGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GremlinDatabaseListResult {
     #[doc = "List of Gremlin databases and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GremlinDatabaseGetResults>,
 }
 impl azure_core::Continuable for GremlinDatabaseListResult {
@@ -3010,7 +3205,12 @@ pub struct GremlinDatabaseRestoreResource {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "The names of the graphs available for restore."]
-    #[serde(rename = "graphNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "graphNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub graph_names: Vec<GraphName>,
 }
 impl GremlinDatabaseRestoreResource {
@@ -3079,7 +3279,11 @@ impl GremlinGraphGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GremlinGraphListResult {
     #[doc = "List of graphs and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GremlinGraphGetResults>,
 }
 impl azure_core::Continuable for GremlinGraphListResult {
@@ -3138,7 +3342,11 @@ pub struct IncludedPath {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "List of indexes for this path"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub indexes: Vec<Indexes>,
 }
 impl IncludedPath {
@@ -3271,16 +3479,36 @@ pub struct IndexingPolicy {
     #[serde(rename = "indexingMode", default, skip_serializing_if = "Option::is_none")]
     pub indexing_mode: Option<indexing_policy::IndexingMode>,
     #[doc = "List of paths to include in the indexing"]
-    #[serde(rename = "includedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_paths: Vec<IncludedPath>,
     #[doc = "List of paths to exclude from indexing"]
-    #[serde(rename = "excludedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_paths: Vec<ExcludedPath>,
     #[doc = "List of composite path list"]
-    #[serde(rename = "compositeIndexes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "compositeIndexes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub composite_indexes: Vec<CompositePathList>,
     #[doc = "List of spatial specifics"]
-    #[serde(rename = "spatialIndexes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "spatialIndexes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub spatial_indexes: Vec<SpatialSpec>,
 }
 impl IndexingPolicy {
@@ -3376,7 +3604,11 @@ impl KeyWrapMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListBackups {
     #[doc = "Container for array of backups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupResource>,
 }
 impl azure_core::Continuable for ListBackups {
@@ -3394,7 +3626,11 @@ impl ListBackups {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListClusters {
     #[doc = "Container for the array of clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClusterResource>,
 }
 impl azure_core::Continuable for ListClusters {
@@ -3412,7 +3648,11 @@ impl ListClusters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListDataCenters {
     #[doc = "Container for array of data centers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataCenterResource>,
 }
 impl azure_core::Continuable for ListDataCenters {
@@ -3471,7 +3711,11 @@ impl LocationGetResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocationListResult {
     #[doc = "List of Cosmos DB locations and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LocationGetResult>,
 }
 impl azure_core::Continuable for LocationListResult {
@@ -3498,7 +3742,12 @@ pub struct LocationProperties {
     #[serde(rename = "isResidencyRestricted", default, skip_serializing_if = "Option::is_none")]
     pub is_residency_restricted: Option<bool>,
     #[doc = "The properties of available backup storage redundancies."]
-    #[serde(rename = "backupStorageRedundancies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupStorageRedundancies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_storage_redundancies: Vec<BackupStorageRedundancy>,
 }
 impl LocationProperties {
@@ -3792,7 +4041,11 @@ pub struct MaterializedViewsBuilderServiceResourceProperties {
     #[serde(flatten)]
     pub service_resource_properties: ServiceResourceProperties,
     #[doc = "An array that contains all of the locations for the service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<MaterializedViewsBuilderRegionalServiceResource>,
 }
 impl MaterializedViewsBuilderServiceResourceProperties {
@@ -3834,7 +4087,12 @@ pub struct Metric {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<MetricName>,
     #[doc = "The metric values for the specified time window and timestep."]
-    #[serde(rename = "metricValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_values: Vec<MetricValue>,
 }
 impl Metric {
@@ -3861,7 +4119,12 @@ impl MetricAvailability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricDefinition {
     #[doc = "The list of metric availabilities for the account."]
-    #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricAvailabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_availabilities: Vec<MetricAvailability>,
     #[doc = "The primary aggregation type of the metric."]
     #[serde(rename = "primaryAggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -3933,7 +4196,11 @@ pub mod metric_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricDefinitionsListResult {
     #[doc = "The list of metric definitions for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetricDefinition>,
 }
 impl azure_core::Continuable for MetricDefinitionsListResult {
@@ -3951,7 +4218,11 @@ impl MetricDefinitionsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricListResult {
     #[doc = "The list of metrics for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Metric>,
 }
 impl azure_core::Continuable for MetricListResult {
@@ -4068,7 +4339,11 @@ impl MongoDbCollectionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoDbCollectionListResult {
     #[doc = "List of MongoDB collections and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoDbCollectionGetResults>,
 }
 impl azure_core::Continuable for MongoDbCollectionListResult {
@@ -4091,7 +4366,11 @@ pub struct MongoDbCollectionResource {
     #[serde(rename = "shardKey", default, skip_serializing_if = "Option::is_none")]
     pub shard_key: Option<ShardKeys>,
     #[doc = "List of index keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub indexes: Vec<MongoIndex>,
     #[doc = "Analytical TTL."]
     #[serde(rename = "analyticalStorageTtl", default, skip_serializing_if = "Option::is_none")]
@@ -4168,7 +4447,11 @@ impl MongoDbDatabaseGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoDbDatabaseListResult {
     #[doc = "List of MongoDB databases and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoDbDatabaseGetResults>,
 }
 impl azure_core::Continuable for MongoDbDatabaseListResult {
@@ -4212,7 +4495,11 @@ impl MongoIndex {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoIndexKeys {
     #[doc = "List of keys for each MongoDB collection in the Azure Cosmos DB service"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<Key>,
 }
 impl MongoIndexKeys {
@@ -4265,7 +4552,11 @@ impl MongoRoleDefinitionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoRoleDefinitionListResult {
     #[doc = "List of Mongo Role Definitions and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoRoleDefinitionGetResults>,
 }
 impl azure_core::Continuable for MongoRoleDefinitionListResult {
@@ -4292,10 +4583,18 @@ pub struct MongoRoleDefinitionResource {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "A set of privileges contained by the Role Definition. This will allow application of this Role Definition on the entire database account or any underlying Database / Collection. Scopes higher than Database are not enforceable as privilege."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub privileges: Vec<Privilege>,
     #[doc = "The set of roles inherited by this Role Definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<Role>,
 }
 impl MongoRoleDefinitionResource {
@@ -4342,7 +4641,11 @@ impl MongoUserDefinitionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MongoUserDefinitionListResult {
     #[doc = "List of User Definition and their properties"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MongoUserDefinitionGetResults>,
 }
 impl azure_core::Continuable for MongoUserDefinitionListResult {
@@ -4372,7 +4675,11 @@ pub struct MongoUserDefinitionResource {
     #[serde(rename = "customData", default, skip_serializing_if = "Option::is_none")]
     pub custom_data: Option<String>,
     #[doc = "The set of roles inherited by the User Definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<Role>,
     #[doc = "The Mongo Auth mechanism. For now, we only support auth mechanism SCRAM-SHA-256."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4433,7 +4740,11 @@ impl NotebookWorkspaceCreateUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotebookWorkspaceListResult {
     #[doc = "Array of notebook workspace resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotebookWorkspace>,
 }
 impl azure_core::Continuable for NotebookWorkspaceListResult {
@@ -4505,7 +4816,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Resource Provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4598,7 +4913,11 @@ impl PartitionMetric {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartitionMetricListResult {
     #[doc = "The list of partition-level metrics for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartitionMetric>,
 }
 impl azure_core::Continuable for PartitionMetricListResult {
@@ -4633,7 +4952,11 @@ impl PartitionUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartitionUsagesResult {
     #[doc = "The list of partition-level usages for the database. A usage is a point in time metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartitionUsage>,
 }
 impl azure_core::Continuable for PartitionUsagesResult {
@@ -4667,7 +4990,12 @@ pub struct PercentileMetric {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<MetricName>,
     #[doc = "The percentile metric values for the specified time window and timestep."]
-    #[serde(rename = "metricValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_values: Vec<PercentileMetricValue>,
 }
 impl PercentileMetric {
@@ -4679,7 +5007,11 @@ impl PercentileMetric {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PercentileMetricListResult {
     #[doc = "The list of percentile metrics for the account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PercentileMetric>,
 }
 impl azure_core::Continuable for PercentileMetricListResult {
@@ -4764,10 +5096,20 @@ impl PeriodicModeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permission {
     #[doc = "An array of data actions that are allowed."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<String>,
     #[doc = "An array of data actions that are denied."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<String>,
 }
 impl Permission {
@@ -4790,7 +5132,12 @@ impl PhysicalPartitionId {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PhysicalPartitionStorageInfoCollection {
     #[doc = "List of physical partitions and their properties."]
-    #[serde(rename = "physicalPartitionStorageInfoCollection", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "physicalPartitionStorageInfoCollection",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub physical_partition_storage_info_collection: Vec<PhysicalPartitionStorageInfo>,
 }
 impl PhysicalPartitionStorageInfoCollection {
@@ -4802,7 +5149,12 @@ impl PhysicalPartitionStorageInfoCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PhysicalPartitionThroughputInfoProperties {
     #[doc = "Array of physical partition throughput info objects"]
-    #[serde(rename = "physicalPartitionThroughputInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "physicalPartitionThroughputInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub physical_partition_throughput_info: Vec<PhysicalPartitionThroughputInfoResource>,
 }
 impl PhysicalPartitionThroughputInfoProperties {
@@ -4868,7 +5220,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -4933,7 +5289,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -4954,10 +5314,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource required zone names."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -4990,7 +5360,11 @@ pub struct Privilege {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub resource: Option<privilege::Resource>,
     #[doc = "An array of actions that are allowed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
 }
 impl Privilege {
@@ -5253,7 +5627,12 @@ pub struct RestorableDatabaseAccountProperties {
     #[serde(rename = "apiType", default, skip_serializing_if = "Option::is_none")]
     pub api_type: Option<ApiType>,
     #[doc = "List of regions where the of the database account can be restored from."]
-    #[serde(rename = "restorableLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restorableLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restorable_locations: Vec<RestorableLocationResource>,
 }
 impl RestorableDatabaseAccountProperties {
@@ -5265,7 +5644,11 @@ impl RestorableDatabaseAccountProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableDatabaseAccountsListResult {
     #[doc = "List of restorable database accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableDatabaseAccountGetResult>,
 }
 impl azure_core::Continuable for RestorableDatabaseAccountsListResult {
@@ -5343,7 +5726,11 @@ pub mod restorable_gremlin_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableGremlinDatabasesListResult {
     #[doc = "List of Gremlin database events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableGremlinDatabaseGetResult>,
 }
 impl azure_core::Continuable for RestorableGremlinDatabasesListResult {
@@ -5421,7 +5808,11 @@ pub mod restorable_gremlin_graph_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableGremlinGraphsListResult {
     #[doc = "List of Gremlin graph events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableGremlinGraphGetResult>,
 }
 impl azure_core::Continuable for RestorableGremlinGraphsListResult {
@@ -5451,7 +5842,12 @@ pub struct RestorableGremlinResourcesGetResult {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "The names of the graphs available for restore."]
-    #[serde(rename = "graphNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "graphNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub graph_names: Vec<GraphName>,
 }
 impl RestorableGremlinResourcesGetResult {
@@ -5463,7 +5859,11 @@ impl RestorableGremlinResourcesGetResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableGremlinResourcesListResult {
     #[doc = "List of restorable Gremlin resources, including the gremlin database and graph names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableGremlinResourcesGetResult>,
 }
 impl azure_core::Continuable for RestorableGremlinResourcesListResult {
@@ -5562,7 +5962,11 @@ pub mod restorable_mongodb_collection_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableMongodbCollectionsListResult {
     #[doc = "List of MongoDB collection events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableMongodbCollectionGetResult>,
 }
 impl azure_core::Continuable for RestorableMongodbCollectionsListResult {
@@ -5640,7 +6044,11 @@ pub mod restorable_mongodb_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableMongodbDatabasesListResult {
     #[doc = "List of MongoDB database events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableMongodbDatabaseGetResult>,
 }
 impl azure_core::Continuable for RestorableMongodbDatabasesListResult {
@@ -5670,7 +6078,12 @@ pub struct RestorableMongodbResourcesGetResult {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "The names of the collections available for restore."]
-    #[serde(rename = "collectionNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectionNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collection_names: Vec<CollectionName>,
 }
 impl RestorableMongodbResourcesGetResult {
@@ -5682,7 +6095,11 @@ impl RestorableMongodbResourcesGetResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableMongodbResourcesListResult {
     #[doc = "List of restorable MongoDB resources, including the database and collection names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableMongodbResourcesGetResult>,
 }
 impl azure_core::Continuable for RestorableMongodbResourcesListResult {
@@ -5786,7 +6203,11 @@ pub mod restorable_sql_container_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableSqlContainersListResult {
     #[doc = "List of SQL container events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableSqlContainerGetResult>,
 }
 impl azure_core::Continuable for RestorableSqlContainersListResult {
@@ -5898,7 +6319,11 @@ pub mod restorable_sql_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableSqlDatabasesListResult {
     #[doc = "List of SQL database events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableSqlDatabaseGetResult>,
 }
 impl azure_core::Continuable for RestorableSqlDatabasesListResult {
@@ -5928,7 +6353,12 @@ pub struct RestorableSqlResourcesGetResult {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "The names of the collections available for restore."]
-    #[serde(rename = "collectionNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectionNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collection_names: Vec<CollectionName>,
 }
 impl RestorableSqlResourcesGetResult {
@@ -5940,7 +6370,11 @@ impl RestorableSqlResourcesGetResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableSqlResourcesListResult {
     #[doc = "List of restorable SQL resources, including the database and collection names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableSqlResourcesGetResult>,
 }
 impl azure_core::Continuable for RestorableSqlResourcesListResult {
@@ -6036,7 +6470,11 @@ impl RestorableTableResourcesGetResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableTableResourcesListResult {
     #[doc = "List of restorable table names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableTableResourcesGetResult>,
 }
 impl azure_core::Continuable for RestorableTableResourcesListResult {
@@ -6054,7 +6492,11 @@ impl RestorableTableResourcesListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableTablesListResult {
     #[doc = "List of Table events and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableTableGetResult>,
 }
 impl azure_core::Continuable for RestorableTablesListResult {
@@ -6081,13 +6523,28 @@ pub struct RestoreParameters {
     #[serde(rename = "restoreTimestampInUtc", default, with = "azure_core::date::rfc3339::option")]
     pub restore_timestamp_in_utc: Option<time::OffsetDateTime>,
     #[doc = "List of specific databases available for restore."]
-    #[serde(rename = "databasesToRestore", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databasesToRestore",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases_to_restore: Vec<DatabaseRestoreResource>,
     #[doc = "List of specific gremlin databases available for restore."]
-    #[serde(rename = "gremlinDatabasesToRestore", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gremlinDatabasesToRestore",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gremlin_databases_to_restore: Vec<GremlinDatabaseRestoreResource>,
     #[doc = "List of specific tables available for restore."]
-    #[serde(rename = "tablesToRestore", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tablesToRestore",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables_to_restore: Vec<TableName>,
 }
 impl RestoreParameters {
@@ -6288,7 +6745,11 @@ impl Serialize for ServiceResourceInstanceSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceResourceListResult {
     #[doc = "List of Service Resource and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResource>,
 }
 impl azure_core::Continuable for ServiceResourceListResult {
@@ -6433,7 +6894,11 @@ pub struct SpatialSpec {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "List of path's spatial type"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub types: Vec<SpatialType>,
 }
 impl SpatialSpec {
@@ -6543,7 +7008,11 @@ impl SqlContainerGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlContainerListResult {
     #[doc = "List of containers and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlContainerGetResults>,
 }
 impl azure_core::Continuable for SqlContainerListResult {
@@ -6685,7 +7154,11 @@ impl SqlDatabaseGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlDatabaseListResult {
     #[doc = "List of SQL databases and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlDatabaseGetResults>,
 }
 impl azure_core::Continuable for SqlDatabaseListResult {
@@ -6745,7 +7218,11 @@ pub struct SqlDedicatedGatewayServiceResourceProperties {
     #[serde(rename = "sqlDedicatedGatewayEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub sql_dedicated_gateway_endpoint: Option<String>,
     #[doc = "An array that contains all of the locations for the service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<SqlDedicatedGatewayRegionalServiceResource>,
 }
 impl SqlDedicatedGatewayServiceResourceProperties {
@@ -6787,7 +7264,11 @@ impl SqlRoleAssignmentGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlRoleAssignmentListResult {
     #[doc = "List of Role Assignments and their properties"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlRoleAssignmentGetResults>,
 }
 impl azure_core::Continuable for SqlRoleAssignmentListResult {
@@ -6849,7 +7330,11 @@ impl SqlRoleDefinitionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlRoleDefinitionListResult {
     #[doc = "List of Role Definitions and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlRoleDefinitionGetResults>,
 }
 impl azure_core::Continuable for SqlRoleDefinitionListResult {
@@ -6873,10 +7358,19 @@ pub struct SqlRoleDefinitionResource {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<sql_role_definition_resource::Type>,
     #[doc = "A set of fully qualified Scopes at or below which Role Assignments may be created using this Role Definition. This will allow application of this Role Definition on the entire database account or any underlying Database / Collection. Must have at least one element. Scopes higher than Database account are not enforceable as assignable Scopes. Note that resources referenced in assignable Scopes need not exist."]
-    #[serde(rename = "assignableScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assignableScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assignable_scopes: Vec<String>,
     #[doc = "The set of operations allowed through this Role Definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<Permission>,
 }
 impl SqlRoleDefinitionResource {
@@ -6952,7 +7446,11 @@ impl SqlStoredProcedureGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlStoredProcedureListResult {
     #[doc = "List of storedProcedures and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlStoredProcedureGetResults>,
 }
 impl azure_core::Continuable for SqlStoredProcedureListResult {
@@ -7039,7 +7537,11 @@ impl SqlTriggerGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlTriggerListResult {
     #[doc = "List of triggers and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlTriggerGetResults>,
 }
 impl azure_core::Continuable for SqlTriggerListResult {
@@ -7220,7 +7722,11 @@ impl SqlUserDefinedFunctionGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlUserDefinedFunctionListResult {
     #[doc = "List of userDefinedFunctions and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlUserDefinedFunctionGetResults>,
 }
 impl azure_core::Continuable for SqlUserDefinedFunctionListResult {
@@ -7309,7 +7815,11 @@ impl TableGetResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TableListResult {
     #[doc = "List of Table and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TableGetResults>,
 }
 impl azure_core::Continuable for TableListResult {
@@ -7435,7 +7945,11 @@ impl ThroughputSettingsUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UniqueKey {
     #[doc = "List of paths must be unique for each document in the Azure Cosmos DB service"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<Path>,
 }
 impl UniqueKey {
@@ -7447,7 +7961,12 @@ impl UniqueKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UniqueKeyPolicy {
     #[doc = "List of unique keys on that enforces uniqueness constraint on documents in the collection in the Azure Cosmos DB service."]
-    #[serde(rename = "uniqueKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "uniqueKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unique_keys: Vec<UniqueKey>,
 }
 impl UniqueKeyPolicy {
@@ -7530,7 +8049,11 @@ impl Usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsagesResult {
     #[doc = "The list of usages for the database. A usage is a point in time metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsagesResult {
diff --git a/services/mgmt/costmanagement/src/package_preview_2020_12/models.rs b/services/mgmt/costmanagement/src/package_preview_2020_12/models.rs
index e348efe765..0836704c73 100644
--- a/services/mgmt/costmanagement/src/package_preview_2020_12/models.rs
+++ b/services/mgmt/costmanagement/src/package_preview_2020_12/models.rs
@@ -284,13 +284,28 @@ pub mod alert_properties {
         #[serde(rename = "triggeredBy", default, skip_serializing_if = "Option::is_none")]
         pub triggered_by: Option<String>,
         #[doc = "array of resourceGroups to filter by"]
-        #[serde(rename = "resourceGroupFilter", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceGroupFilter",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_group_filter: Vec<serde_json::Value>,
         #[doc = "array of resources to filter by"]
-        #[serde(rename = "resourceFilter", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceFilter",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_filter: Vec<serde_json::Value>,
         #[doc = "array of meters to filter by"]
-        #[serde(rename = "meterFilter", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "meterFilter",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub meter_filter: Vec<serde_json::Value>,
         #[doc = "tags to filter by"]
         #[serde(rename = "tagFilter", default, skip_serializing_if = "Option::is_none")]
@@ -311,13 +326,28 @@ pub mod alert_properties {
         #[serde(rename = "currentSpend", default, skip_serializing_if = "Option::is_none")]
         pub current_spend: Option<f64>,
         #[doc = "list of emails to contact"]
-        #[serde(rename = "contactEmails", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "contactEmails",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub contact_emails: Vec<String>,
         #[doc = "list of action groups to broadcast to"]
-        #[serde(rename = "contactGroups", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "contactGroups",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub contact_groups: Vec<String>,
         #[doc = "list of contact roles"]
-        #[serde(rename = "contactRoles", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "contactRoles",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub contact_roles: Vec<String>,
         #[doc = "overriding alert"]
         #[serde(rename = "overridingAlert", default, skip_serializing_if = "Option::is_none")]
@@ -471,7 +501,11 @@ pub mod alert_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertsResult {
     #[doc = "List of alerts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
     #[doc = "URL to get the next set of alerts results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -572,7 +606,11 @@ pub struct DimensionProperties {
     #[doc = "Grouping enabled."]
     #[serde(rename = "groupingEnabled", default, skip_serializing_if = "Option::is_none")]
     pub grouping_enabled: Option<bool>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<String>,
     #[doc = "Total number of data for the dimension."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -599,7 +637,11 @@ impl DimensionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DimensionsListResult {
     #[doc = "The list of dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Dimension>,
 }
 impl azure_core::Continuable for DimensionsListResult {
@@ -743,7 +785,11 @@ pub mod export_dataset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExportDatasetConfiguration {
     #[doc = "Array of column names to be included in the export. If not provided then the export will include all available columns. The available columns can vary by customer channel (see examples)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<String>,
 }
 impl ExportDatasetConfiguration {
@@ -921,7 +967,11 @@ impl ExportExecution {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExportExecutionListResult {
     #[doc = "A list of export executions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExportExecution>,
 }
 impl ExportExecutionListResult {
@@ -1056,7 +1106,11 @@ pub mod export_execution_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExportListResult {
     #[doc = "The list of exports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Export>,
 }
 impl ExportListResult {
@@ -1623,7 +1677,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of cost management operations supported by the Microsoft.CostManagement resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1884,7 +1942,11 @@ pub struct QueryDataset {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub aggregation: Option<serde_json::Value>,
     #[doc = "Array of group by expression to use in the query. Query can have up to 2 group by clauses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub grouping: Vec<QueryGrouping>,
     #[doc = "The filter expression to be used in the export."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1937,7 +1999,11 @@ pub mod query_dataset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryDatasetConfiguration {
     #[doc = "Array of column names to be included in the query. Any valid query column name is allowed. If not provided, then query includes all columns."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<String>,
 }
 impl QueryDatasetConfiguration {
@@ -2060,10 +2126,18 @@ pub mod query_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryFilter {
     #[doc = "The logical \"AND\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub and: Vec<QueryFilter>,
     #[doc = "The logical \"OR\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub or: Vec<QueryFilter>,
     #[doc = "The filter expression to be used in the export."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2100,10 +2174,18 @@ pub struct QueryProperties {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Array of columns"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<QueryColumn>,
     #[doc = "Array of rows"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rows: Vec<Vec<serde_json::Value>>,
 }
 impl QueryProperties {
@@ -2295,10 +2377,18 @@ pub struct ReportConfigDataset {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub aggregation: Option<serde_json::Value>,
     #[doc = "Array of group by expression to use in the report. Report can have up to 2 group by clauses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub grouping: Vec<ReportConfigGrouping>,
     #[doc = "Array of order by expression to use in the report."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sorting: Vec<ReportConfigSorting>,
     #[doc = "The filter expression to be used in the report."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2353,7 +2443,11 @@ pub mod report_config_dataset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReportConfigDatasetConfiguration {
     #[doc = "Array of column names to be included in the report. Any valid report column name is allowed. If not provided, then report includes all columns."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<String>,
 }
 impl ReportConfigDatasetConfiguration {
@@ -2469,10 +2563,18 @@ pub mod report_config_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReportConfigFilter {
     #[doc = "The logical \"AND\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub and: Vec<ReportConfigFilter>,
     #[doc = "The logical \"OR\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub or: Vec<ReportConfigFilter>,
     #[doc = "The filter expression to be used in the report."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2642,7 +2744,11 @@ impl View {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ViewListResult {
     #[doc = "The list of views."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<View>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2687,10 +2793,18 @@ pub struct ViewProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metric: Option<view_properties::Metric>,
     #[doc = "List of KPIs to show in Cost Analysis UI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kpis: Vec<KpiProperties>,
     #[doc = "Configuration of 3 sub-views in the Cost Analysis UI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pivots: Vec<PivotProperties>,
 }
 impl ViewProperties {
diff --git a/services/mgmt/costmanagement/src/package_preview_2022_02/models.rs b/services/mgmt/costmanagement/src/package_preview_2022_02/models.rs
index 976ffcad08..9308583955 100644
--- a/services/mgmt/costmanagement/src/package_preview_2022_02/models.rs
+++ b/services/mgmt/costmanagement/src/package_preview_2022_02/models.rs
@@ -115,7 +115,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of consumption operations supported by the Microsoft.Consumption resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/costmanagement/src/package_preview_2022_04/models.rs b/services/mgmt/costmanagement/src/package_preview_2022_04/models.rs
index d7f19a47fc..216ca2905d 100644
--- a/services/mgmt/costmanagement/src/package_preview_2022_04/models.rs
+++ b/services/mgmt/costmanagement/src/package_preview_2022_04/models.rs
@@ -286,13 +286,28 @@ pub mod alert_properties {
         #[serde(rename = "triggeredBy", default, skip_serializing_if = "Option::is_none")]
         pub triggered_by: Option<String>,
         #[doc = "array of resourceGroups to filter by"]
-        #[serde(rename = "resourceGroupFilter", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceGroupFilter",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_group_filter: Vec<serde_json::Value>,
         #[doc = "array of resources to filter by"]
-        #[serde(rename = "resourceFilter", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceFilter",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_filter: Vec<serde_json::Value>,
         #[doc = "array of meters to filter by"]
-        #[serde(rename = "meterFilter", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "meterFilter",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub meter_filter: Vec<serde_json::Value>,
         #[doc = "tags to filter by"]
         #[serde(rename = "tagFilter", default, skip_serializing_if = "Option::is_none")]
@@ -313,13 +328,28 @@ pub mod alert_properties {
         #[serde(rename = "currentSpend", default, skip_serializing_if = "Option::is_none")]
         pub current_spend: Option<f64>,
         #[doc = "list of emails to contact"]
-        #[serde(rename = "contactEmails", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "contactEmails",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub contact_emails: Vec<String>,
         #[doc = "list of action groups to broadcast to"]
-        #[serde(rename = "contactGroups", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "contactGroups",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub contact_groups: Vec<String>,
         #[doc = "list of contact roles"]
-        #[serde(rename = "contactRoles", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "contactRoles",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub contact_roles: Vec<String>,
         #[doc = "overriding alert"]
         #[serde(rename = "overridingAlert", default, skip_serializing_if = "Option::is_none")]
@@ -491,7 +521,11 @@ pub mod alert_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertsResult {
     #[doc = "List of alerts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
     #[doc = "URL to get the next set of alerts results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -720,7 +754,11 @@ pub struct DimensionProperties {
     #[serde(rename = "groupingEnabled", default, skip_serializing_if = "Option::is_none")]
     pub grouping_enabled: Option<bool>,
     #[doc = "Dimension data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<String>,
     #[doc = "Total number of data for the dimension."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -747,7 +785,11 @@ impl DimensionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DimensionsListResult {
     #[doc = "The list of dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Dimension>,
 }
 impl azure_core::Continuable for DimensionsListResult {
@@ -877,7 +919,11 @@ pub mod export_dataset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExportDatasetConfiguration {
     #[doc = "Array of column names to be included in the export. If not provided then the export will include all available columns. The available columns can vary by customer channel (see examples)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<String>,
 }
 impl ExportDatasetConfiguration {
@@ -1055,7 +1101,11 @@ impl ExportExecution {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExportExecutionListResult {
     #[doc = "A list of export executions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExportExecution>,
 }
 impl ExportExecutionListResult {
@@ -1190,7 +1240,11 @@ pub mod export_execution_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExportListResult {
     #[doc = "The list of exports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Export>,
 }
 impl ExportListResult {
@@ -1348,7 +1402,12 @@ impl ExportTimePeriod {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileDestination {
     #[doc = "Destination of the view data. Currently only csv format is supported."]
-    #[serde(rename = "fileFormats", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fileFormats",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_formats: Vec<FileFormat>,
 }
 impl FileDestination {
@@ -1693,7 +1752,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of cost management operations supported by the Microsoft.CostManagement resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2012,7 +2075,11 @@ pub struct QueryDataset {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub aggregation: Option<serde_json::Value>,
     #[doc = "Array of group by expression to use in the query. Query can have up to 2 group by clauses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub grouping: Vec<QueryGrouping>,
     #[doc = "The filter expression to be used in the export."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2065,7 +2132,11 @@ pub mod query_dataset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryDatasetConfiguration {
     #[doc = "Array of column names to be included in the query. Any valid query column name is allowed. If not provided, then query includes all columns."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<String>,
 }
 impl QueryDatasetConfiguration {
@@ -2188,10 +2259,18 @@ pub mod query_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryFilter {
     #[doc = "The logical \"AND\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub and: Vec<QueryFilter>,
     #[doc = "The logical \"OR\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub or: Vec<QueryFilter>,
     #[doc = "The comparison expression to be used in the query."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2226,10 +2305,18 @@ pub struct QueryProperties {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Array of columns"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<QueryColumn>,
     #[doc = "Array of rows"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rows: Vec<Vec<serde_json::Value>>,
 }
 impl QueryProperties {
@@ -2422,10 +2509,18 @@ pub struct ReportConfigDataset {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub aggregation: Option<serde_json::Value>,
     #[doc = "Array of group by expression to use in the report. Report can have up to 2 group by clauses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub grouping: Vec<ReportConfigGrouping>,
     #[doc = "Array of order by expression to use in the report."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sorting: Vec<ReportConfigSorting>,
     #[doc = "The filter expression to be used in the report."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2480,7 +2575,11 @@ pub mod report_config_dataset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReportConfigDatasetConfiguration {
     #[doc = "Array of column names to be included in the report. Any valid report column name is allowed. If not provided, then report includes all columns."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<String>,
 }
 impl ReportConfigDatasetConfiguration {
@@ -2600,10 +2699,18 @@ pub mod report_config_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReportConfigFilter {
     #[doc = "The logical \"AND\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub and: Vec<ReportConfigFilter>,
     #[doc = "The logical \"OR\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub or: Vec<ReportConfigFilter>,
     #[doc = "The comparison expression to be used in the report."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2852,10 +2959,20 @@ pub struct ScheduleProperties {
     #[serde(rename = "hourOfDay", default, skip_serializing_if = "Option::is_none")]
     pub hour_of_day: Option<i32>,
     #[doc = "Day names in english on which cost analysis data will be emailed. This property is applicable when frequency is Weekly or Monthly."]
-    #[serde(rename = "daysOfWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_week: Vec<DaysOfWeek>,
     #[doc = "Weeks in which cost analysis data will be emailed. This property is applicable when frequency is Monthly and used in combination with daysOfWeek."]
-    #[serde(rename = "weeksOfMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weeksOfMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weeks_of_month: Vec<WeeksOfMonth>,
     #[doc = "UTC day on which cost analysis data will be emailed. Must be between 1 and 31. This property is applicable when frequency is Monthly and overrides weeksOfMonth or daysOfWeek."]
     #[serde(rename = "dayOfMonth", default, skip_serializing_if = "Option::is_none")]
@@ -2933,7 +3050,11 @@ impl Serialize for ScheduledActionKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScheduledActionListResult {
     #[doc = "The list of scheduled actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScheduledAction>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3073,7 +3194,11 @@ impl View {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ViewListResult {
     #[doc = "The list of views."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<View>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3124,10 +3249,18 @@ pub struct ViewProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metric: Option<view_properties::Metric>,
     #[doc = "List of KPIs to show in Cost Analysis UI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kpis: Vec<KpiProperties>,
     #[doc = "Configuration of 3 sub-views in the Cost Analysis UI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pivots: Vec<PivotProperties>,
 }
 impl ViewProperties {
diff --git a/services/mgmt/costmanagement/src/package_preview_2022_06/models.rs b/services/mgmt/costmanagement/src/package_preview_2022_06/models.rs
index f6780b6272..cd0c0b38e4 100644
--- a/services/mgmt/costmanagement/src/package_preview_2022_06/models.rs
+++ b/services/mgmt/costmanagement/src/package_preview_2022_06/models.rs
@@ -286,13 +286,28 @@ pub mod alert_properties {
         #[serde(rename = "triggeredBy", default, skip_serializing_if = "Option::is_none")]
         pub triggered_by: Option<String>,
         #[doc = "array of resourceGroups to filter by"]
-        #[serde(rename = "resourceGroupFilter", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceGroupFilter",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_group_filter: Vec<serde_json::Value>,
         #[doc = "array of resources to filter by"]
-        #[serde(rename = "resourceFilter", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceFilter",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_filter: Vec<serde_json::Value>,
         #[doc = "array of meters to filter by"]
-        #[serde(rename = "meterFilter", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "meterFilter",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub meter_filter: Vec<serde_json::Value>,
         #[doc = "tags to filter by"]
         #[serde(rename = "tagFilter", default, skip_serializing_if = "Option::is_none")]
@@ -313,13 +328,28 @@ pub mod alert_properties {
         #[serde(rename = "currentSpend", default, skip_serializing_if = "Option::is_none")]
         pub current_spend: Option<f64>,
         #[doc = "list of emails to contact"]
-        #[serde(rename = "contactEmails", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "contactEmails",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub contact_emails: Vec<String>,
         #[doc = "list of action groups to broadcast to"]
-        #[serde(rename = "contactGroups", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "contactGroups",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub contact_groups: Vec<String>,
         #[doc = "list of contact roles"]
-        #[serde(rename = "contactRoles", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "contactRoles",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub contact_roles: Vec<String>,
         #[doc = "overriding alert"]
         #[serde(rename = "overridingAlert", default, skip_serializing_if = "Option::is_none")]
@@ -491,7 +521,11 @@ pub mod alert_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertsResult {
     #[doc = "List of alerts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
     #[doc = "URL to get the next set of alerts results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -720,7 +754,11 @@ pub struct DimensionProperties {
     #[serde(rename = "groupingEnabled", default, skip_serializing_if = "Option::is_none")]
     pub grouping_enabled: Option<bool>,
     #[doc = "Dimension data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<String>,
     #[doc = "Total number of data for the dimension."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -747,7 +785,11 @@ impl DimensionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DimensionsListResult {
     #[doc = "The list of dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Dimension>,
 }
 impl azure_core::Continuable for DimensionsListResult {
@@ -877,7 +919,11 @@ pub mod export_dataset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExportDatasetConfiguration {
     #[doc = "Array of column names to be included in the export. If not provided then the export will include all available columns. The available columns can vary by customer channel (see examples)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<String>,
 }
 impl ExportDatasetConfiguration {
@@ -1055,7 +1101,11 @@ impl ExportExecution {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExportExecutionListResult {
     #[doc = "A list of export executions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExportExecution>,
 }
 impl ExportExecutionListResult {
@@ -1190,7 +1240,11 @@ pub mod export_execution_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExportListResult {
     #[doc = "The list of exports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Export>,
 }
 impl ExportListResult {
@@ -1348,7 +1402,12 @@ impl ExportTimePeriod {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileDestination {
     #[doc = "Destination of the view data. Currently only csv format is supported."]
-    #[serde(rename = "fileFormats", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fileFormats",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_formats: Vec<FileFormat>,
 }
 impl FileDestination {
@@ -1693,7 +1752,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of cost management operations supported by the Microsoft.CostManagement resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2012,7 +2075,11 @@ pub struct QueryDataset {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub aggregation: Option<serde_json::Value>,
     #[doc = "Array of group by expression to use in the query. Query can have up to 2 group by clauses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub grouping: Vec<QueryGrouping>,
     #[doc = "The filter expression to be used in the export."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2065,7 +2132,11 @@ pub mod query_dataset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryDatasetConfiguration {
     #[doc = "Array of column names to be included in the query. Any valid query column name is allowed. If not provided, then query includes all columns."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<String>,
 }
 impl QueryDatasetConfiguration {
@@ -2188,10 +2259,18 @@ pub mod query_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryFilter {
     #[doc = "The logical \"AND\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub and: Vec<QueryFilter>,
     #[doc = "The logical \"OR\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub or: Vec<QueryFilter>,
     #[doc = "The comparison expression to be used in the query."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2226,10 +2305,18 @@ pub struct QueryProperties {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Array of columns"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<QueryColumn>,
     #[doc = "Array of rows"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rows: Vec<Vec<serde_json::Value>>,
 }
 impl QueryProperties {
@@ -2422,10 +2509,18 @@ pub struct ReportConfigDataset {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub aggregation: Option<serde_json::Value>,
     #[doc = "Array of group by expression to use in the report. Report can have up to 2 group by clauses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub grouping: Vec<ReportConfigGrouping>,
     #[doc = "Array of order by expression to use in the report."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sorting: Vec<ReportConfigSorting>,
     #[doc = "The filter expression to be used in the report."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2480,7 +2575,11 @@ pub mod report_config_dataset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReportConfigDatasetConfiguration {
     #[doc = "Array of column names to be included in the report. Any valid report column name is allowed. If not provided, then report includes all columns."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<String>,
 }
 impl ReportConfigDatasetConfiguration {
@@ -2600,10 +2699,18 @@ pub mod report_config_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReportConfigFilter {
     #[doc = "The logical \"AND\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub and: Vec<ReportConfigFilter>,
     #[doc = "The logical \"OR\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub or: Vec<ReportConfigFilter>,
     #[doc = "The comparison expression to be used in the report."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2852,10 +2959,20 @@ pub struct ScheduleProperties {
     #[serde(rename = "hourOfDay", default, skip_serializing_if = "Option::is_none")]
     pub hour_of_day: Option<i32>,
     #[doc = "Day names in english on which cost analysis data will be emailed. This property is applicable when frequency is Weekly or Monthly."]
-    #[serde(rename = "daysOfWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_week: Vec<DaysOfWeek>,
     #[doc = "Weeks in which cost analysis data will be emailed. This property is applicable when frequency is Monthly and used in combination with daysOfWeek."]
-    #[serde(rename = "weeksOfMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weeksOfMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weeks_of_month: Vec<WeeksOfMonth>,
     #[doc = "UTC day on which cost analysis data will be emailed. Must be between 1 and 31. This property is applicable when frequency is Monthly and overrides weeksOfMonth or daysOfWeek."]
     #[serde(rename = "dayOfMonth", default, skip_serializing_if = "Option::is_none")]
@@ -2935,7 +3052,11 @@ impl Serialize for ScheduledActionKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScheduledActionListResult {
     #[doc = "The list of scheduled actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScheduledAction>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3075,7 +3196,11 @@ impl View {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ViewListResult {
     #[doc = "The list of views."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<View>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3126,10 +3251,18 @@ pub struct ViewProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metric: Option<view_properties::Metric>,
     #[doc = "List of KPIs to show in Cost Analysis UI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kpis: Vec<KpiProperties>,
     #[doc = "Configuration of 3 sub-views in the Cost Analysis UI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pivots: Vec<PivotProperties>,
 }
 impl ViewProperties {
diff --git a/services/mgmt/costmanagement/src/package_preview_2022_08/models.rs b/services/mgmt/costmanagement/src/package_preview_2022_08/models.rs
index f5a41c877d..404dafa592 100644
--- a/services/mgmt/costmanagement/src/package_preview_2022_08/models.rs
+++ b/services/mgmt/costmanagement/src/package_preview_2022_08/models.rs
@@ -286,13 +286,28 @@ pub mod alert_properties {
         #[serde(rename = "triggeredBy", default, skip_serializing_if = "Option::is_none")]
         pub triggered_by: Option<String>,
         #[doc = "array of resourceGroups to filter by"]
-        #[serde(rename = "resourceGroupFilter", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceGroupFilter",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_group_filter: Vec<serde_json::Value>,
         #[doc = "array of resources to filter by"]
-        #[serde(rename = "resourceFilter", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceFilter",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_filter: Vec<serde_json::Value>,
         #[doc = "array of meters to filter by"]
-        #[serde(rename = "meterFilter", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "meterFilter",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub meter_filter: Vec<serde_json::Value>,
         #[doc = "tags to filter by"]
         #[serde(rename = "tagFilter", default, skip_serializing_if = "Option::is_none")]
@@ -313,13 +328,28 @@ pub mod alert_properties {
         #[serde(rename = "currentSpend", default, skip_serializing_if = "Option::is_none")]
         pub current_spend: Option<f64>,
         #[doc = "list of emails to contact"]
-        #[serde(rename = "contactEmails", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "contactEmails",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub contact_emails: Vec<String>,
         #[doc = "list of action groups to broadcast to"]
-        #[serde(rename = "contactGroups", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "contactGroups",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub contact_groups: Vec<String>,
         #[doc = "list of contact roles"]
-        #[serde(rename = "contactRoles", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "contactRoles",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub contact_roles: Vec<String>,
         #[doc = "overriding alert"]
         #[serde(rename = "overridingAlert", default, skip_serializing_if = "Option::is_none")]
@@ -491,7 +521,11 @@ pub mod alert_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertsResult {
     #[doc = "List of alerts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
     #[doc = "URL to get the next set of alerts results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -529,7 +563,11 @@ pub struct DimensionProperties {
     #[serde(rename = "groupingEnabled", default, skip_serializing_if = "Option::is_none")]
     pub grouping_enabled: Option<bool>,
     #[doc = "Dimension data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<String>,
     #[doc = "Total number of data for the dimension."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -556,7 +594,11 @@ impl DimensionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DimensionsListResult {
     #[doc = "The list of dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Dimension>,
 }
 impl azure_core::Continuable for DimensionsListResult {
@@ -897,7 +939,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of cost management operations supported by the Microsoft.CostManagement resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1216,7 +1262,11 @@ pub struct QueryDataset {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub aggregation: Option<serde_json::Value>,
     #[doc = "Array of group by expression to use in the query. Query can have up to 2 group by clauses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub grouping: Vec<QueryGrouping>,
     #[doc = "The filter expression to be used in the export."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1269,7 +1319,11 @@ pub mod query_dataset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryDatasetConfiguration {
     #[doc = "Array of column names to be included in the query. Any valid query column name is allowed. If not provided, then query includes all columns."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<String>,
 }
 impl QueryDatasetConfiguration {
@@ -1392,10 +1446,18 @@ pub mod query_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryFilter {
     #[doc = "The logical \"AND\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub and: Vec<QueryFilter>,
     #[doc = "The logical \"OR\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub or: Vec<QueryFilter>,
     #[doc = "The comparison expression to be used in the query."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1430,10 +1492,18 @@ pub struct QueryProperties {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Array of columns"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<QueryColumn>,
     #[doc = "Array of rows"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rows: Vec<Vec<serde_json::Value>>,
 }
 impl QueryProperties {
@@ -1626,10 +1696,18 @@ pub struct ReportConfigDataset {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub aggregation: Option<serde_json::Value>,
     #[doc = "Array of group by expression to use in the report. Report can have up to 2 group by clauses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub grouping: Vec<ReportConfigGrouping>,
     #[doc = "Array of order by expression to use in the report."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sorting: Vec<ReportConfigSorting>,
     #[doc = "The filter expression to be used in the report."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1684,7 +1762,11 @@ pub mod report_config_dataset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReportConfigDatasetConfiguration {
     #[doc = "Array of column names to be included in the report. Any valid report column name is allowed. If not provided, then report includes all columns."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<String>,
 }
 impl ReportConfigDatasetConfiguration {
@@ -1804,10 +1886,18 @@ pub mod report_config_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReportConfigFilter {
     #[doc = "The logical \"AND\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub and: Vec<ReportConfigFilter>,
     #[doc = "The logical \"OR\" expression. Must have at least 2 items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub or: Vec<ReportConfigFilter>,
     #[doc = "The comparison expression to be used in the report."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2026,7 +2116,11 @@ impl View {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ViewListResult {
     #[doc = "The list of views."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<View>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2077,10 +2171,18 @@ pub struct ViewProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metric: Option<view_properties::Metric>,
     #[doc = "List of KPIs to show in Cost Analysis UI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kpis: Vec<KpiProperties>,
     #[doc = "Configuration of 3 sub-views in the Cost Analysis UI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pivots: Vec<PivotProperties>,
 }
 impl ViewProperties {
diff --git a/services/mgmt/cpim/src/package_2019_01_01_preview/models.rs b/services/mgmt/cpim/src/package_2019_01_01_preview/models.rs
index 04ff67cb35..0caa109aea 100644
--- a/services/mgmt/cpim/src/package_2019_01_01_preview/models.rs
+++ b/services/mgmt/cpim/src/package_2019_01_01_preview/models.rs
@@ -139,7 +139,11 @@ pub mod b2c_tenant_resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct B2cTenantResourceList {
     #[doc = "List of guest usages resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<B2cTenantResource>,
 }
 impl azure_core::Continuable for B2cTenantResourceList {
@@ -326,10 +330,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -404,7 +417,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of cpim service operations supported by the Microsoft.AzureActiveDirectory resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
diff --git a/services/mgmt/cpim/src/package_2020_05_01_preview/models.rs b/services/mgmt/cpim/src/package_2020_05_01_preview/models.rs
index fc0bc55865..0f4905a283 100644
--- a/services/mgmt/cpim/src/package_2020_05_01_preview/models.rs
+++ b/services/mgmt/cpim/src/package_2020_05_01_preview/models.rs
@@ -49,10 +49,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -91,7 +100,11 @@ impl GuestUsagesResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GuestUsagesResourceList {
     #[doc = "List of guest usages resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GuestUsagesResource>,
 }
 impl azure_core::Continuable for GuestUsagesResourceList {
@@ -172,7 +185,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of cpim service operations supported by the Microsoft.AzureActiveDirectory resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
diff --git a/services/mgmt/cpim/src/package_2021_04_01/models.rs b/services/mgmt/cpim/src/package_2021_04_01/models.rs
index 3bd45afddf..f694692309 100644
--- a/services/mgmt/cpim/src/package_2021_04_01/models.rs
+++ b/services/mgmt/cpim/src/package_2021_04_01/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -200,7 +204,11 @@ pub mod b2c_tenant_resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct B2cTenantResourceList {
     #[doc = "List of Azure AD B2C tenant resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<B2cTenantResource>,
 }
 impl azure_core::Continuable for B2cTenantResourceList {
@@ -418,10 +426,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -463,7 +480,11 @@ impl GuestUsagesResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GuestUsagesResourceList {
     #[doc = "List of guest usages resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GuestUsagesResource>,
 }
 impl azure_core::Continuable for GuestUsagesResourceList {
diff --git a/services/mgmt/customerinsights/src/package_2017_01/models.rs b/services/mgmt/customerinsights/src/package_2017_01/models.rs
index 2ea554a17f..7c79bfefe6 100644
--- a/services/mgmt/customerinsights/src/package_2017_01/models.rs
+++ b/services/mgmt/customerinsights/src/package_2017_01/models.rs
@@ -54,7 +54,11 @@ impl AuthorizationPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationPolicyListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AuthorizationPolicyResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -168,7 +172,11 @@ pub mod connector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectorListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectorResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -406,7 +414,11 @@ pub mod connector_mapping_format {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectorMappingListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectorMappingResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -762,7 +774,11 @@ pub struct EntityTypeDefinition {
     #[serde(rename = "entityType", default, skip_serializing_if = "Option::is_none")]
     pub entity_type: Option<entity_type_definition::EntityType>,
     #[doc = "The properties of the Profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fields: Vec<PropertyDefinition>,
     #[doc = "The instance count."]
     #[serde(rename = "instancesCount", default, skip_serializing_if = "Option::is_none")]
@@ -856,7 +872,11 @@ impl HubBillingInfoFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HubListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Hub>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -919,7 +939,11 @@ impl ImageDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InteractionListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InteractionResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -956,16 +980,31 @@ pub struct InteractionTypeDefinition {
     #[serde(flatten)]
     pub entity_type_definition: EntityTypeDefinition,
     #[doc = "The id property names. Properties which uniquely identify an interaction instance."]
-    #[serde(rename = "idPropertyNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "idPropertyNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub id_property_names: Vec<String>,
     #[doc = "Profiles that participated in the interaction."]
-    #[serde(rename = "participantProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "participantProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub participant_profiles: Vec<Participant>,
     #[doc = "The primary participant property name for an interaction ,This is used to logically represent the agent of the interaction, Specify the participant name here from ParticipantName."]
     #[serde(rename = "primaryParticipantProfilePropertyName", default, skip_serializing_if = "Option::is_none")]
     pub primary_participant_profile_property_name: Option<String>,
     #[doc = "This is specific to interactions modeled as activities. Data sources are used to determine where data is stored and also in precedence rules."]
-    #[serde(rename = "dataSourcePrecedenceRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSourcePrecedenceRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_source_precedence_rules: Vec<DataSourcePrecedence>,
     #[doc = "Data Source is a way for us to know the source of instances. A single type can have data coming in from multiple places. In activities we use this to determine precedence rules."]
     #[serde(rename = "defaultDataSource", default, skip_serializing_if = "Option::is_none")]
@@ -1031,13 +1070,28 @@ pub struct KpiDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub filter: Option<String>,
     #[doc = "the group by properties for the KPI."]
-    #[serde(rename = "groupBy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupBy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by: Vec<String>,
     #[doc = "The KPI GroupByMetadata."]
-    #[serde(rename = "groupByMetadata", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByMetadata",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_metadata: Vec<KpiGroupByMetadata>,
     #[doc = "The participant profiles."]
-    #[serde(rename = "participantProfilesMetadata", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "participantProfilesMetadata",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub participant_profiles_metadata: Vec<KpiParticipantProfilesMetadata>,
     #[doc = "Provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1046,10 +1100,18 @@ pub struct KpiDefinition {
     #[serde(rename = "thresHolds", default, skip_serializing_if = "Option::is_none")]
     pub thres_holds: Option<KpiThresholds>,
     #[doc = "The aliases."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aliases: Vec<KpiAlias>,
     #[doc = "The KPI extracts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extracts: Vec<KpiExtract>,
 }
 impl KpiDefinition {
@@ -1151,7 +1213,11 @@ impl KpiGroupByMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KpiListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KpiResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1238,7 +1304,11 @@ pub struct LinkDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<serde_json::Value>,
     #[doc = "The set of properties mappings between the source and target Types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mappings: Vec<TypePropertiesMapping>,
     #[doc = "The properties that represent the participating profile."]
     #[serde(rename = "participantPropertyReferences")]
@@ -1287,7 +1357,11 @@ pub mod link_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinkListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1388,7 +1462,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Customer Insights operations supported by the Microsoft.CustomerInsights resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1487,7 +1565,11 @@ impl ProfileEnumValidValuesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProfileResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1524,7 +1606,12 @@ pub struct ProfileTypeDefinition {
     #[serde(flatten)]
     pub entity_type_definition: EntityTypeDefinition,
     #[doc = "The strong IDs."]
-    #[serde(rename = "strongIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "strongIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub strong_ids: Vec<StrongId>,
 }
 impl ProfileTypeDefinition {
@@ -1539,7 +1626,12 @@ pub struct PropertyDefinition {
     #[serde(rename = "arrayValueSeparator", default, skip_serializing_if = "Option::is_none")]
     pub array_value_separator: Option<String>,
     #[doc = "Describes valid values for an enum property."]
-    #[serde(rename = "enumValidValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enumValidValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enum_valid_values: Vec<ProfileEnumValidValuesFormat>,
     #[doc = "Name of the property."]
     #[serde(rename = "fieldName")]
@@ -1581,7 +1673,12 @@ pub struct PropertyDefinition {
     #[serde(rename = "isAvailableInGraph", default, skip_serializing_if = "Option::is_none")]
     pub is_available_in_graph: Option<bool>,
     #[doc = "This is specific to interactions modeled as activities. Data sources are used to determine where data is stored and also in precedence rules."]
-    #[serde(rename = "dataSourcePrecedenceRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSourcePrecedenceRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_source_precedence_rules: Vec<DataSourcePrecedence>,
 }
 impl PropertyDefinition {
@@ -1685,10 +1782,19 @@ pub struct RelationshipDefinition {
     #[serde(rename = "expiryDateTimeUtc", default, with = "azure_core::date::rfc3339::option")]
     pub expiry_date_time_utc: Option<time::OffsetDateTime>,
     #[doc = "The properties of the Relationship."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fields: Vec<PropertyDefinition>,
     #[doc = "Optional property to be used to map fields in profile to their strong ids in related profile."]
-    #[serde(rename = "lookupMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "lookupMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub lookup_mappings: Vec<RelationshipTypeMapping>,
     #[doc = "Profile type."]
     #[serde(rename = "profileType")]
@@ -1753,7 +1859,11 @@ pub struct RelationshipLinkDefinition {
     #[serde(rename = "linkName", default, skip_serializing_if = "Option::is_none")]
     pub link_name: Option<String>,
     #[doc = "The mappings between Interaction and Relationship fields."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mappings: Vec<RelationshipLinkFieldMapping>,
     #[doc = "The property references for the Profile of the Relationship."]
     #[serde(rename = "profilePropertyReferences")]
@@ -1831,7 +1941,11 @@ pub mod relationship_link_field_mapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RelationshipLinkListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RelationshipLinkResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1866,7 +1980,11 @@ impl RelationshipLinkResourceFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RelationshipListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RelationshipResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1934,13 +2052,23 @@ pub struct RelationshipsLookup {
     #[serde(rename = "profileName", default, skip_serializing_if = "Option::is_none")]
     pub profile_name: Option<String>,
     #[doc = "The property references for the profile type."]
-    #[serde(rename = "profilePropertyReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "profilePropertyReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub profile_property_references: Vec<ParticipantPropertyReference>,
     #[doc = "The related profile."]
     #[serde(rename = "relatedProfileName", default, skip_serializing_if = "Option::is_none")]
     pub related_profile_name: Option<String>,
     #[doc = "The property references for the related profile type."]
-    #[serde(rename = "relatedProfilePropertyReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "relatedProfilePropertyReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub related_profile_property_references: Vec<ParticipantPropertyReference>,
     #[doc = "The name of existing Relationship."]
     #[serde(rename = "existingRelationshipName", default, skip_serializing_if = "Option::is_none")]
@@ -1979,10 +2107,18 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSetDescription {
     #[doc = "The elements included in the set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub elements: Vec<String>,
     #[doc = "The elements that are not included in the set, in case elements contains '*' indicating 'all'."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions: Vec<String>,
 }
 impl ResourceSetDescription {
@@ -2110,7 +2246,11 @@ pub mod role_assignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleAssignmentListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleAssignmentResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2145,7 +2285,11 @@ impl RoleAssignmentResourceFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2269,7 +2413,12 @@ pub struct SuggestRelationshipLinksResponse {
     #[serde(rename = "interactionName", default, skip_serializing_if = "Option::is_none")]
     pub interaction_name: Option<String>,
     #[doc = "Suggested relationships for the type."]
-    #[serde(rename = "suggestedRelationships", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "suggestedRelationships",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub suggested_relationships: Vec<RelationshipsLookup>,
 }
 impl SuggestRelationshipLinksResponse {
@@ -2353,7 +2502,11 @@ impl View {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ViewListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ViewResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2433,7 +2586,11 @@ impl WidgetType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WidgetTypeListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WidgetTypeResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/customerinsights/src/package_2017_04/models.rs b/services/mgmt/customerinsights/src/package_2017_04/models.rs
index e058b00901..721c05d004 100644
--- a/services/mgmt/customerinsights/src/package_2017_04/models.rs
+++ b/services/mgmt/customerinsights/src/package_2017_04/models.rs
@@ -54,7 +54,11 @@ impl AuthorizationPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationPolicyListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AuthorizationPolicyResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -104,7 +108,11 @@ pub struct CanonicalProfileDefinition {
     #[serde(rename = "canonicalProfileId", default, skip_serializing_if = "Option::is_none")]
     pub canonical_profile_id: Option<i64>,
     #[doc = "Properties of the canonical profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub properties: Vec<serde_json::Value>,
 }
 impl CanonicalProfileDefinition {
@@ -183,7 +191,11 @@ pub mod connector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectorListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectorResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -421,7 +433,11 @@ pub mod connector_mapping_format {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectorMappingListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectorMappingResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -777,7 +793,11 @@ pub struct EntityTypeDefinition {
     #[serde(rename = "entityType", default, skip_serializing_if = "Option::is_none")]
     pub entity_type: Option<entity_type_definition::EntityType>,
     #[doc = "The properties of the Profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fields: Vec<PropertyDefinition>,
     #[doc = "The instance count."]
     #[serde(rename = "instancesCount", default, skip_serializing_if = "Option::is_none")]
@@ -871,7 +891,11 @@ impl HubBillingInfoFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HubListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Hub>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -934,7 +958,11 @@ impl ImageDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InteractionListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InteractionResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -971,16 +999,31 @@ pub struct InteractionTypeDefinition {
     #[serde(flatten)]
     pub entity_type_definition: EntityTypeDefinition,
     #[doc = "The id property names. Properties which uniquely identify an interaction instance."]
-    #[serde(rename = "idPropertyNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "idPropertyNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub id_property_names: Vec<String>,
     #[doc = "Profiles that participated in the interaction."]
-    #[serde(rename = "participantProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "participantProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub participant_profiles: Vec<Participant>,
     #[doc = "The primary participant property name for an interaction ,This is used to logically represent the agent of the interaction, Specify the participant name here from ParticipantName."]
     #[serde(rename = "primaryParticipantProfilePropertyName", default, skip_serializing_if = "Option::is_none")]
     pub primary_participant_profile_property_name: Option<String>,
     #[doc = "This is specific to interactions modeled as activities. Data sources are used to determine where data is stored and also in precedence rules."]
-    #[serde(rename = "dataSourcePrecedenceRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSourcePrecedenceRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_source_precedence_rules: Vec<DataSourcePrecedence>,
     #[doc = "Data Source is a way for us to know the source of instances. A single type can have data coming in from multiple places. In activities we use this to determine precedence rules."]
     #[serde(rename = "defaultDataSource", default, skip_serializing_if = "Option::is_none")]
@@ -1046,13 +1089,28 @@ pub struct KpiDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub filter: Option<String>,
     #[doc = "the group by properties for the KPI."]
-    #[serde(rename = "groupBy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupBy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by: Vec<String>,
     #[doc = "The KPI GroupByMetadata."]
-    #[serde(rename = "groupByMetadata", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByMetadata",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_metadata: Vec<KpiGroupByMetadata>,
     #[doc = "The participant profiles."]
-    #[serde(rename = "participantProfilesMetadata", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "participantProfilesMetadata",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub participant_profiles_metadata: Vec<KpiParticipantProfilesMetadata>,
     #[doc = "Provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1061,10 +1119,18 @@ pub struct KpiDefinition {
     #[serde(rename = "thresHolds", default, skip_serializing_if = "Option::is_none")]
     pub thres_holds: Option<KpiThresholds>,
     #[doc = "The aliases."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aliases: Vec<KpiAlias>,
     #[doc = "The KPI extracts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extracts: Vec<KpiExtract>,
 }
 impl KpiDefinition {
@@ -1166,7 +1232,11 @@ impl KpiGroupByMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KpiListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KpiResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1259,7 +1329,11 @@ pub struct LinkDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<serde_json::Value>,
     #[doc = "The set of properties mappings between the source and target Types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mappings: Vec<TypePropertiesMapping>,
     #[doc = "The properties that represent the participating profile."]
     #[serde(rename = "participantPropertyReferences")]
@@ -1328,7 +1402,11 @@ pub mod link_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinkListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1429,7 +1507,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Customer Insights operations supported by the Microsoft.CustomerInsights resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1537,13 +1619,28 @@ pub struct Prediction {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<serde_json::Value>,
     #[doc = "Interaction types involved in the prediction."]
-    #[serde(rename = "involvedInteractionTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "involvedInteractionTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub involved_interaction_types: Vec<String>,
     #[doc = "KPI types involved in the prediction."]
-    #[serde(rename = "involvedKpiTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "involvedKpiTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub involved_kpi_types: Vec<String>,
     #[doc = "Relationships involved in the prediction."]
-    #[serde(rename = "involvedRelationships", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "involvedRelationships",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub involved_relationships: Vec<String>,
     #[doc = "Negative outcome expression."]
     #[serde(rename = "negativeOutcomeExpression")]
@@ -1575,7 +1672,11 @@ pub struct Prediction {
     #[serde(rename = "scoreLabel")]
     pub score_label: String,
     #[doc = "The prediction grades."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub grades: Vec<serde_json::Value>,
     #[doc = "System generated entities."]
     #[serde(rename = "systemGeneratedEntities", default, skip_serializing_if = "Option::is_none")]
@@ -1633,10 +1734,20 @@ pub mod prediction {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct SystemGeneratedEntities {
         #[doc = "Generated interaction types."]
-        #[serde(rename = "generatedInteractionTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "generatedInteractionTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub generated_interaction_types: Vec<String>,
         #[doc = "Generated links."]
-        #[serde(rename = "generatedLinks", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "generatedLinks",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub generated_links: Vec<String>,
         #[doc = "Generated KPIs."]
         #[serde(rename = "generatedKpis", default, skip_serializing_if = "Option::is_none")]
@@ -1658,7 +1769,11 @@ pub struct PredictionDistributionDefinition {
     #[serde(rename = "totalNegatives", default, skip_serializing_if = "Option::is_none")]
     pub total_negatives: Option<i64>,
     #[doc = "Distributions of the prediction."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub distributions: Vec<serde_json::Value>,
 }
 impl PredictionDistributionDefinition {
@@ -1670,7 +1785,11 @@ impl PredictionDistributionDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PredictionListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PredictionResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1839,7 +1958,12 @@ pub struct PredictionTrainingResults {
     #[serde(rename = "predictionDistribution", default, skip_serializing_if = "Option::is_none")]
     pub prediction_distribution: Option<PredictionDistributionDefinition>,
     #[doc = "Canonical profiles."]
-    #[serde(rename = "canonicalProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "canonicalProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub canonical_profiles: Vec<CanonicalProfileDefinition>,
     #[doc = "Instance count of the primary profile."]
     #[serde(rename = "primaryProfileInstanceCount", default, skip_serializing_if = "Option::is_none")]
@@ -1869,7 +1993,11 @@ impl ProfileEnumValidValuesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProfileResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1906,7 +2034,12 @@ pub struct ProfileTypeDefinition {
     #[serde(flatten)]
     pub entity_type_definition: EntityTypeDefinition,
     #[doc = "The strong IDs."]
-    #[serde(rename = "strongIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "strongIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub strong_ids: Vec<StrongId>,
 }
 impl ProfileTypeDefinition {
@@ -1921,7 +2054,12 @@ pub struct PropertyDefinition {
     #[serde(rename = "arrayValueSeparator", default, skip_serializing_if = "Option::is_none")]
     pub array_value_separator: Option<String>,
     #[doc = "Describes valid values for an enum property."]
-    #[serde(rename = "enumValidValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enumValidValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enum_valid_values: Vec<ProfileEnumValidValuesFormat>,
     #[doc = "Name of the property."]
     #[serde(rename = "fieldName")]
@@ -1963,7 +2101,12 @@ pub struct PropertyDefinition {
     #[serde(rename = "isAvailableInGraph", default, skip_serializing_if = "Option::is_none")]
     pub is_available_in_graph: Option<bool>,
     #[doc = "This is specific to interactions modeled as activities. Data sources are used to determine where data is stored and also in precedence rules."]
-    #[serde(rename = "dataSourcePrecedenceRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSourcePrecedenceRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_source_precedence_rules: Vec<DataSourcePrecedence>,
 }
 impl PropertyDefinition {
@@ -2067,10 +2210,19 @@ pub struct RelationshipDefinition {
     #[serde(rename = "expiryDateTimeUtc", default, with = "azure_core::date::rfc3339::option")]
     pub expiry_date_time_utc: Option<time::OffsetDateTime>,
     #[doc = "The properties of the Relationship."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fields: Vec<PropertyDefinition>,
     #[doc = "Optional property to be used to map fields in profile to their strong ids in related profile."]
-    #[serde(rename = "lookupMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "lookupMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub lookup_mappings: Vec<RelationshipTypeMapping>,
     #[doc = "Profile type."]
     #[serde(rename = "profileType")]
@@ -2135,7 +2287,11 @@ pub struct RelationshipLinkDefinition {
     #[serde(rename = "linkName", default, skip_serializing_if = "Option::is_none")]
     pub link_name: Option<String>,
     #[doc = "The mappings between Interaction and Relationship fields."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mappings: Vec<RelationshipLinkFieldMapping>,
     #[doc = "The property references for the Profile of the Relationship."]
     #[serde(rename = "profilePropertyReferences")]
@@ -2213,7 +2369,11 @@ pub mod relationship_link_field_mapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RelationshipLinkListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RelationshipLinkResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2248,7 +2408,11 @@ impl RelationshipLinkResourceFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RelationshipListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RelationshipResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2316,13 +2480,23 @@ pub struct RelationshipsLookup {
     #[serde(rename = "profileName", default, skip_serializing_if = "Option::is_none")]
     pub profile_name: Option<String>,
     #[doc = "The property references for the profile type."]
-    #[serde(rename = "profilePropertyReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "profilePropertyReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub profile_property_references: Vec<ParticipantProfilePropertyReference>,
     #[doc = "The related profile."]
     #[serde(rename = "relatedProfileName", default, skip_serializing_if = "Option::is_none")]
     pub related_profile_name: Option<String>,
     #[doc = "The property references for the related profile type."]
-    #[serde(rename = "relatedProfilePropertyReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "relatedProfilePropertyReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub related_profile_property_references: Vec<ParticipantProfilePropertyReference>,
     #[doc = "The name of existing Relationship."]
     #[serde(rename = "existingRelationshipName", default, skip_serializing_if = "Option::is_none")]
@@ -2361,10 +2535,18 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSetDescription {
     #[doc = "The elements included in the set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub elements: Vec<String>,
     #[doc = "The elements that are not included in the set, in case elements contains '*' indicating 'all'."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions: Vec<String>,
 }
 impl ResourceSetDescription {
@@ -2492,7 +2674,11 @@ pub mod role_assignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleAssignmentListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleAssignmentResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2527,7 +2713,11 @@ impl RoleAssignmentResourceFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2651,7 +2841,12 @@ pub struct SuggestRelationshipLinksResponse {
     #[serde(rename = "interactionName", default, skip_serializing_if = "Option::is_none")]
     pub interaction_name: Option<String>,
     #[doc = "Suggested relationships for the type."]
-    #[serde(rename = "suggestedRelationships", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "suggestedRelationships",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub suggested_relationships: Vec<RelationshipsLookup>,
 }
 impl SuggestRelationshipLinksResponse {
@@ -2731,7 +2926,11 @@ impl View {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ViewListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ViewResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2811,7 +3010,11 @@ impl WidgetType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WidgetTypeListResult {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WidgetTypeResourceFormat>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/customerlockbox/src/package_2018_02_28_preview/models.rs b/services/mgmt/customerlockbox/src/package_2018_02_28_preview/models.rs
index ca87eee538..804db19212 100644
--- a/services/mgmt/customerlockbox/src/package_2018_02_28_preview/models.rs
+++ b/services/mgmt/customerlockbox/src/package_2018_02_28_preview/models.rs
@@ -101,7 +101,12 @@ pub struct ErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of error details about the error."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorBody {
@@ -307,7 +312,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Customer Lockbox operations supported by the Microsoft.StreamAnalytics resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -328,7 +337,11 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RequestListResult {
     #[doc = "A list of Lockbox requests. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LockboxRequestResponse>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/customproviders/src/package_2018_09_01_preview/models.rs b/services/mgmt/customproviders/src/package_2018_09_01_preview/models.rs
index bc834a9326..5507fef7b6 100644
--- a/services/mgmt/customproviders/src/package_2018_09_01_preview/models.rs
+++ b/services/mgmt/customproviders/src/package_2018_09_01_preview/models.rs
@@ -92,7 +92,11 @@ pub mod association {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssociationsList {
     #[doc = "The array of associations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Association>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -187,13 +191,26 @@ pub mod custom_rp_manifest {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "A list of actions that the custom resource provider implements."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub actions: Vec<CustomRpActionRouteDefinition>,
         #[doc = "A list of resource types that the custom resource provider implements."]
-        #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_types: Vec<CustomRpResourceTypeRouteDefinition>,
         #[doc = "A list of validations to run on the custom resource provider's requests."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub validations: Vec<CustomRpValidations>,
         #[doc = "The provisioning state of the resource provider."]
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -387,7 +404,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -417,7 +438,11 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListByCustomRpManifest {
     #[doc = "The array of custom resource provider manifests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomRpManifest>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -506,7 +531,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/dashboard/src/package_2021_09_01_preview/models.rs b/services/mgmt/dashboard/src/package_2021_09_01_preview/models.rs
index 273a91adf9..227eab2638 100644
--- a/services/mgmt/dashboard/src/package_2021_09_01_preview/models.rs
+++ b/services/mgmt/dashboard/src/package_2021_09_01_preview/models.rs
@@ -141,10 +141,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -246,7 +255,11 @@ impl ManagedGrafana {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedGrafanaListResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedGrafana>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -381,7 +394,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Dashboard provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/dashboard/src/package_2022_05_01_preview/models.rs b/services/mgmt/dashboard/src/package_2022_05_01_preview/models.rs
index 644753f44f..6b816bd3bf 100644
--- a/services/mgmt/dashboard/src/package_2022_05_01_preview/models.rs
+++ b/services/mgmt/dashboard/src/package_2022_05_01_preview/models.rs
@@ -148,10 +148,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -214,7 +223,11 @@ impl ManagedGrafana {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedGrafanaListResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedGrafana>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -251,10 +264,20 @@ pub struct ManagedGrafanaProperties {
     #[serde(rename = "deterministicOutboundIP", default, skip_serializing_if = "Option::is_none")]
     pub deterministic_outbound_ip: Option<DeterministicOutboundIp>,
     #[doc = "List of outbound IPs if deterministicOutboundIP is enabled."]
-    #[serde(rename = "outboundIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outboundIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outbound_i_ps: Vec<String>,
     #[doc = "The private endpoint connections of the Grafana instance."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Scope for dns deterministic name hash calculation"]
     #[serde(rename = "autoGeneratedDomainNameLabelScope", default, skip_serializing_if = "Option::is_none")]
@@ -500,7 +523,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -547,7 +574,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -574,7 +605,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "privateLinkServiceConnectionState")]
     pub private_link_service_connection_state: PrivateLinkServiceConnectionState,
     #[doc = "The private endpoint connection group ids."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -688,7 +724,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -714,10 +754,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
diff --git a/services/mgmt/dashboard/src/package_2022_08_01/models.rs b/services/mgmt/dashboard/src/package_2022_08_01/models.rs
index d557bf9244..cc2dc28899 100644
--- a/services/mgmt/dashboard/src/package_2022_08_01/models.rs
+++ b/services/mgmt/dashboard/src/package_2022_08_01/models.rs
@@ -160,10 +160,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -192,7 +201,12 @@ impl ErrorResponse {
 #[doc = "GrafanaIntegrations is a bundled observability experience (e.g. pre-configured data source, tailored Grafana dashboards, alerting defaults) for common monitoring scenarios."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GrafanaIntegrations {
-    #[serde(rename = "azureMonitorWorkspaceIntegrations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureMonitorWorkspaceIntegrations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_monitor_workspace_integrations: Vec<AzureMonitorWorkspaceIntegration>,
 }
 impl GrafanaIntegrations {
@@ -237,7 +251,11 @@ impl ManagedGrafana {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedGrafanaListResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedGrafana>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -274,10 +292,20 @@ pub struct ManagedGrafanaProperties {
     #[serde(rename = "deterministicOutboundIP", default, skip_serializing_if = "Option::is_none")]
     pub deterministic_outbound_ip: Option<DeterministicOutboundIp>,
     #[doc = "List of outbound IPs if deterministicOutboundIP is enabled."]
-    #[serde(rename = "outboundIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outboundIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outbound_i_ps: Vec<String>,
     #[doc = "The private endpoint connections of the Grafana instance."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Scope for dns deterministic name hash calculation"]
     #[serde(rename = "autoGeneratedDomainNameLabelScope", default, skip_serializing_if = "Option::is_none")]
@@ -529,7 +557,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -576,7 +608,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -603,7 +639,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "privateLinkServiceConnectionState")]
     pub private_link_service_connection_state: PrivateLinkServiceConnectionState,
     #[doc = "The private endpoint connection group ids."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -717,7 +758,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -743,10 +788,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
diff --git a/services/mgmt/data/src/package_2017_03_01_preview/models.rs b/services/mgmt/data/src/package_2017_03_01_preview/models.rs
index ff30cc7368..47e0c54e84 100644
--- a/services/mgmt/data/src/package_2017_03_01_preview/models.rs
+++ b/services/mgmt/data/src/package_2017_03_01_preview/models.rs
@@ -34,7 +34,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -126,7 +130,11 @@ pub struct ODataError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ODataError>,
 }
 impl ODataError {
@@ -222,7 +230,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -409,7 +421,11 @@ impl SqlServer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlServerListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlServer>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -471,7 +487,11 @@ impl SqlServerRegistration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlServerRegistrationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlServerRegistration>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/data/src/package_preview_2019_07/models.rs b/services/mgmt/data/src/package_preview_2019_07/models.rs
index ff30cc7368..47e0c54e84 100644
--- a/services/mgmt/data/src/package_preview_2019_07/models.rs
+++ b/services/mgmt/data/src/package_preview_2019_07/models.rs
@@ -34,7 +34,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -126,7 +130,11 @@ pub struct ODataError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ODataError>,
 }
 impl ODataError {
@@ -222,7 +230,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -409,7 +421,11 @@ impl SqlServer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlServerListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlServer>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -471,7 +487,11 @@ impl SqlServerRegistration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlServerRegistrationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlServerRegistration>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/databox/src/package_2021_03/models.rs b/services/mgmt/databox/src/package_2021_03/models.rs
index f8ec36c1ce..615c3a0ba5 100644
--- a/services/mgmt/databox/src/package_2021_03/models.rs
+++ b/services/mgmt/databox/src/package_2021_03/models.rs
@@ -16,7 +16,12 @@ pub struct AccountCredentialDetails {
     #[serde(rename = "accountConnectionString", default, skip_serializing_if = "Option::is_none")]
     pub account_connection_string: Option<String>,
     #[doc = "Per share level unencrypted access credentials."]
-    #[serde(rename = "shareCredentialDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareCredentialDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_credential_details: Vec<ShareCredentialDetails>,
 }
 impl AccountCredentialDetails {
@@ -69,7 +74,12 @@ pub struct AddressValidationProperties {
     #[serde(rename = "validationStatus", default, skip_serializing_if = "Option::is_none")]
     pub validation_status: Option<address_validation_properties::ValidationStatus>,
     #[doc = "List of alternate addresses."]
-    #[serde(rename = "alternateAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_addresses: Vec<ShippingAddress>,
 }
 impl AddressValidationProperties {
@@ -150,7 +160,12 @@ pub struct AvailableSkuRequest {
     #[doc = "Location for data transfer. For locations check: https://management.azure.com/subscriptions/SUBSCRIPTIONID/locations?api-version=2018-01-01"]
     pub location: String,
     #[doc = "Sku Names to filter for available skus"]
-    #[serde(rename = "skuNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_names: Vec<String>,
 }
 impl AvailableSkuRequest {
@@ -176,7 +191,11 @@ pub mod available_sku_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableSkusResult {
     #[doc = "List of available skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuInformation>,
     #[doc = "Link for the next set of skus."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -197,13 +216,28 @@ impl AvailableSkusResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureFileFilterDetails {
     #[doc = "Prefix list of the Azure files to be transferred."]
-    #[serde(rename = "filePrefixList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filePrefixList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_prefix_list: Vec<String>,
     #[doc = "List of full path of the files to be transferred."]
-    #[serde(rename = "filePathList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filePathList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_path_list: Vec<String>,
     #[doc = "List of file shares to be transferred."]
-    #[serde(rename = "fileShareList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fileShareList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_share_list: Vec<String>,
 }
 impl AzureFileFilterDetails {
@@ -215,13 +249,28 @@ impl AzureFileFilterDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobFilterDetails {
     #[doc = "Prefix list of the Azure blobs to be transferred."]
-    #[serde(rename = "blobPrefixList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobPrefixList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_prefix_list: Vec<String>,
     #[doc = "List of full path of the blobs to be transferred."]
-    #[serde(rename = "blobPathList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobPathList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_path_list: Vec<String>,
     #[doc = "List of blob containers to be transferred."]
-    #[serde(rename = "containerList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_list: Vec<String>,
 }
 impl BlobFilterDetails {
@@ -253,10 +302,19 @@ pub struct CloudError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Cloud error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudError>,
     #[doc = "Cloud error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<AdditionalErrorInfo>,
 }
 impl CloudError {
@@ -282,7 +340,12 @@ pub struct ContactDetails {
     #[serde(rename = "emailList")]
     pub email_list: Vec<String>,
     #[doc = "Notification preference for a job stage."]
-    #[serde(rename = "notificationPreference", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationPreference",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_preference: Vec<NotificationPreference>,
 }
 impl ContactDetails {
@@ -586,7 +649,12 @@ pub struct DataBoxDiskJobDetails {
     #[serde(rename = "preferredDisks", default, skip_serializing_if = "Option::is_none")]
     pub preferred_disks: Option<serde_json::Value>,
     #[doc = "Copy progress per disk."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<DataBoxDiskCopyProgress>,
     #[doc = "Contains the map of disk serial number to the disk size being used for the job. Is returned only after the disks are shipped to the customer."]
     #[serde(rename = "disksAndSizeDetails", default, skip_serializing_if = "Option::is_none")]
@@ -612,7 +680,12 @@ pub struct DataBoxDiskJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secrets object for that device."]
-    #[serde(rename = "diskSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_secrets: Vec<DiskSecret>,
     #[doc = "PassKey for the disk Job."]
     #[serde(rename = "passKey", default, skip_serializing_if = "Option::is_none")]
@@ -640,10 +713,20 @@ pub struct DataBoxHeavyAccountCopyLogDetails {
     #[serde(rename = "accountName", default, skip_serializing_if = "Option::is_none")]
     pub account_name: Option<String>,
     #[doc = "Link for copy logs."]
-    #[serde(rename = "copyLogLink", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyLogLink",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_log_link: Vec<String>,
     #[doc = "Link for copy verbose logs. This will be set only when the LogCollectionLevel is set to verbose."]
-    #[serde(rename = "copyVerboseLogLink", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyVerboseLogLink",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_verbose_log_link: Vec<String>,
 }
 impl DataBoxHeavyAccountCopyLogDetails {
@@ -662,7 +745,12 @@ pub struct DataBoxHeavyJobDetails {
     #[serde(flatten)]
     pub job_details: JobDetails,
     #[doc = "Copy progress per account."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<CopyProgress>,
     #[doc = "Set Device password for unlocking Databox Heavy. Should not be passed for TransferType:ExportFromAzure jobs. If this is not passed, the service will generate password itself. This will not be returned in Get Call. Password Requirements :  Password must be minimum of 12 and maximum of 64 characters. Password must have at least one uppercase alphabet, one number and one special character. Password cannot have the following characters : IilLoO0 Password can have only alphabets, numbers and these characters : @#\\-$%^!+=;:_()]+"]
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
@@ -683,7 +771,12 @@ pub struct DataBoxHeavyJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secret objects for a databox heavy job."]
-    #[serde(rename = "cabinetPodSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cabinetPodSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cabinet_pod_secrets: Vec<DataBoxHeavySecret>,
 }
 impl DataBoxHeavyJobSecrets {
@@ -704,13 +797,23 @@ pub struct DataBoxHeavySecret {
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
     pub device_password: Option<String>,
     #[doc = "Network configuration of the appliance."]
-    #[serde(rename = "networkConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_configurations: Vec<ApplianceNetworkConfiguration>,
     #[doc = "The base 64 encoded public key to authenticate with the device"]
     #[serde(rename = "encodedValidationCertPubKey", default, skip_serializing_if = "Option::is_none")]
     pub encoded_validation_cert_pub_key: Option<String>,
     #[doc = "Per account level access credentials."]
-    #[serde(rename = "accountCredentialDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accountCredentialDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub account_credential_details: Vec<AccountCredentialDetails>,
 }
 impl DataBoxHeavySecret {
@@ -724,7 +827,12 @@ pub struct DataBoxJobDetails {
     #[serde(flatten)]
     pub job_details: JobDetails,
     #[doc = "Copy progress per storage account."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<CopyProgress>,
     #[doc = "Set Device password for unlocking Databox. Should not be passed for TransferType:ExportFromAzure jobs. If this is not passed, the service will generate password itself. This will not be returned in Get Call. Password Requirements :  Password must be minimum of 12 and maximum of 64 characters. Password must have at least one uppercase alphabet, one number and one special character. Password cannot have the following characters : IilLoO0 Password can have only alphabets, numbers and these characters : @#\\-$%^!+=;:_()]+"]
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
@@ -762,13 +870,23 @@ pub struct DataBoxSecret {
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
     pub device_password: Option<String>,
     #[doc = "Network configuration of the appliance."]
-    #[serde(rename = "networkConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_configurations: Vec<ApplianceNetworkConfiguration>,
     #[doc = "The base 64 encoded public key to authenticate with the device"]
     #[serde(rename = "encodedValidationCertPubKey", default, skip_serializing_if = "Option::is_none")]
     pub encoded_validation_cert_pub_key: Option<String>,
     #[doc = "Per account level access credentials."]
-    #[serde(rename = "accountCredentialDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accountCredentialDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub account_credential_details: Vec<AccountCredentialDetails>,
 }
 impl DataBoxSecret {
@@ -845,10 +963,20 @@ pub struct DataTransferDetailsValidationRequest {
     #[serde(flatten)]
     pub validation_input_request: ValidationInputRequest,
     #[doc = "List of DataTransfer details to be used to export data from azure."]
-    #[serde(rename = "dataExportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataExportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_export_details: Vec<DataExportDetails>,
     #[doc = "List of DataTransfer details to be used to import data to azure."]
-    #[serde(rename = "dataImportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataImportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_import_details: Vec<DataImportDetails>,
     #[doc = "Device type."]
     #[serde(rename = "deviceType")]
@@ -921,7 +1049,12 @@ pub struct DataboxJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secret objects for a job."]
-    #[serde(rename = "podSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "podSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pod_secrets: Vec<DataBoxSecret>,
 }
 impl DataboxJobSecrets {
@@ -1019,7 +1152,11 @@ pub mod encryption_preferences {
 pub struct ErrorDetail {
     pub code: String,
     pub message: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Details>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
@@ -1105,7 +1242,12 @@ impl JobDeliveryInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct JobDetails {
     #[doc = "List of stages that run in the job."]
-    #[serde(rename = "jobStages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobStages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_stages: Vec<JobStages>,
     #[doc = "Contact Details."]
     #[serde(rename = "contactDetails")]
@@ -1120,10 +1262,20 @@ pub struct JobDetails {
     #[serde(rename = "returnPackage", default, skip_serializing_if = "Option::is_none")]
     pub return_package: Option<PackageShippingDetails>,
     #[doc = "Details of the data to be imported into azure."]
-    #[serde(rename = "dataImportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataImportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_import_details: Vec<DataImportDetails>,
     #[doc = "Details of the data to be exported from azure."]
-    #[serde(rename = "dataExportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataExportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_export_details: Vec<DataExportDetails>,
     #[doc = "Indicates the type of job details."]
     #[serde(rename = "jobDetailsType")]
@@ -1132,7 +1284,12 @@ pub struct JobDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub preferences: Option<Preferences>,
     #[doc = "List of copy log details."]
-    #[serde(rename = "copyLogDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyLogDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_log_details: Vec<CopyLogDetails>,
     #[doc = "Shared access key to download the return shipment label"]
     #[serde(rename = "reverseShipmentLabelSasKey", default, skip_serializing_if = "Option::is_none")]
@@ -1147,7 +1304,11 @@ pub struct JobDetails {
     #[serde(rename = "expectedDataSizeInTeraBytes", default, skip_serializing_if = "Option::is_none")]
     pub expected_data_size_in_tera_bytes: Option<i32>,
     #[doc = "Available actions on the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Last Mitigation Action Performed On Job"]
     #[serde(rename = "lastMitigationActionOnJob", default, skip_serializing_if = "Option::is_none")]
@@ -1328,7 +1489,11 @@ impl JobResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobResourceList {
     #[doc = "List of job resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResource>,
     #[doc = "Link for the next set of job resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1652,7 +1817,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link for the next set of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1699,7 +1868,12 @@ impl PackageShippingDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Preferences {
     #[doc = "Preferred data center region."]
-    #[serde(rename = "preferredDataCenterRegion", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preferredDataCenterRegion",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub preferred_data_center_region: Vec<String>,
     #[doc = "Preferences related to the shipment logistics of the sku"]
     #[serde(rename = "transportPreferences", default, skip_serializing_if = "Option::is_none")]
@@ -1882,7 +2056,12 @@ pub mod schedule_availability_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScheduleAvailabilityResponse {
     #[doc = "List of dates available to schedule"]
-    #[serde(rename = "availableDates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableDates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_dates: Vec<time::OffsetDateTime>,
 }
 impl ScheduleAvailabilityResponse {
@@ -1906,7 +2085,12 @@ pub struct ShareCredentialDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub password: Option<String>,
     #[doc = "Access protocols supported on the device."]
-    #[serde(rename = "supportedAccessProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAccessProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_access_protocols: Vec<String>,
 }
 impl ShareCredentialDetails {
@@ -2191,16 +2375,30 @@ impl SkuInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuProperties {
     #[doc = "The map of data location to service location."]
-    #[serde(rename = "dataLocationToServiceLocationMap", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataLocationToServiceLocationMap",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_location_to_service_location_map: Vec<DataLocationToServiceLocationMap>,
     #[doc = "Capacity of the sku."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<SkuCapacity>,
     #[doc = "Cost of the Sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "Api versions that support this Sku."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Reason why the Sku is disabled."]
     #[serde(rename = "disabledReason", default, skip_serializing_if = "Option::is_none")]
@@ -2389,7 +2587,12 @@ pub struct TransferFilterDetails {
     #[serde(rename = "azureFileFilterDetails", default, skip_serializing_if = "Option::is_none")]
     pub azure_file_filter_details: Option<AzureFileFilterDetails>,
     #[doc = "Details of the filter files to be used for data transfer."]
-    #[serde(rename = "filterFileDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filterFileDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filter_file_details: Vec<FilterFileDetails>,
 }
 impl TransferFilterDetails {
@@ -2463,7 +2666,12 @@ pub mod transport_availability_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransportAvailabilityResponse {
     #[doc = "List of transport availability details for given region"]
-    #[serde(rename = "transportAvailabilityDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "transportAvailabilityDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transport_availability_details: Vec<TransportAvailabilityDetails>,
 }
 impl TransportAvailabilityResponse {
@@ -2511,7 +2719,11 @@ impl UnencryptedCredentials {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UnencryptedCredentialsList {
     #[doc = "List of unencrypted credentials."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UnencryptedCredentials>,
     #[doc = "Link for the next set of unencrypted credentials."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2728,7 +2940,12 @@ pub struct ValidationResponseProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<validation_response_properties::Status>,
     #[doc = "List of response details contain validationType and its response as key and value respectively."]
-    #[serde(rename = "individualResponseDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "individualResponseDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub individual_response_details: Vec<ValidationInputResponse>,
 }
 impl ValidationResponseProperties {
diff --git a/services/mgmt/databox/src/package_2021_05/models.rs b/services/mgmt/databox/src/package_2021_05/models.rs
index 57e2df5055..31e1a7b112 100644
--- a/services/mgmt/databox/src/package_2021_05/models.rs
+++ b/services/mgmt/databox/src/package_2021_05/models.rs
@@ -16,7 +16,12 @@ pub struct AccountCredentialDetails {
     #[serde(rename = "accountConnectionString", default, skip_serializing_if = "Option::is_none")]
     pub account_connection_string: Option<String>,
     #[doc = "Per share level unencrypted access credentials."]
-    #[serde(rename = "shareCredentialDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareCredentialDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_credential_details: Vec<ShareCredentialDetails>,
 }
 impl AccountCredentialDetails {
@@ -69,7 +74,12 @@ pub struct AddressValidationProperties {
     #[serde(rename = "validationStatus", default, skip_serializing_if = "Option::is_none")]
     pub validation_status: Option<address_validation_properties::ValidationStatus>,
     #[doc = "List of alternate addresses."]
-    #[serde(rename = "alternateAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_addresses: Vec<ShippingAddress>,
 }
 impl AddressValidationProperties {
@@ -150,7 +160,12 @@ pub struct AvailableSkuRequest {
     #[doc = "Location for data transfer. For locations check: https://management.azure.com/subscriptions/SUBSCRIPTIONID/locations?api-version=2018-01-01"]
     pub location: String,
     #[doc = "Sku Names to filter for available skus"]
-    #[serde(rename = "skuNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_names: Vec<String>,
 }
 impl AvailableSkuRequest {
@@ -176,7 +191,11 @@ pub mod available_sku_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableSkusResult {
     #[doc = "List of available skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuInformation>,
     #[doc = "Link for the next set of skus."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -197,13 +216,28 @@ impl AvailableSkusResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureFileFilterDetails {
     #[doc = "Prefix list of the Azure files to be transferred."]
-    #[serde(rename = "filePrefixList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filePrefixList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_prefix_list: Vec<String>,
     #[doc = "List of full path of the files to be transferred."]
-    #[serde(rename = "filePathList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filePathList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_path_list: Vec<String>,
     #[doc = "List of file shares to be transferred."]
-    #[serde(rename = "fileShareList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fileShareList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_share_list: Vec<String>,
 }
 impl AzureFileFilterDetails {
@@ -215,13 +249,28 @@ impl AzureFileFilterDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobFilterDetails {
     #[doc = "Prefix list of the Azure blobs to be transferred."]
-    #[serde(rename = "blobPrefixList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobPrefixList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_prefix_list: Vec<String>,
     #[doc = "List of full path of the blobs to be transferred."]
-    #[serde(rename = "blobPathList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobPathList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_path_list: Vec<String>,
     #[doc = "List of blob containers to be transferred."]
-    #[serde(rename = "containerList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_list: Vec<String>,
 }
 impl BlobFilterDetails {
@@ -253,10 +302,19 @@ pub struct CloudError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Cloud error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudError>,
     #[doc = "Cloud error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<AdditionalErrorInfo>,
 }
 impl CloudError {
@@ -282,7 +340,12 @@ pub struct ContactDetails {
     #[serde(rename = "emailList")]
     pub email_list: Vec<String>,
     #[doc = "Notification preference for a job stage."]
-    #[serde(rename = "notificationPreference", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationPreference",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_preference: Vec<NotificationPreference>,
 }
 impl ContactDetails {
@@ -586,7 +649,12 @@ pub struct DataBoxDiskJobDetails {
     #[serde(rename = "preferredDisks", default, skip_serializing_if = "Option::is_none")]
     pub preferred_disks: Option<serde_json::Value>,
     #[doc = "Copy progress per disk."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<DataBoxDiskCopyProgress>,
     #[doc = "Contains the map of disk serial number to the disk size being used for the job. Is returned only after the disks are shipped to the customer."]
     #[serde(rename = "disksAndSizeDetails", default, skip_serializing_if = "Option::is_none")]
@@ -612,7 +680,12 @@ pub struct DataBoxDiskJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secrets object for that device."]
-    #[serde(rename = "diskSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_secrets: Vec<DiskSecret>,
     #[doc = "PassKey for the disk Job."]
     #[serde(rename = "passKey", default, skip_serializing_if = "Option::is_none")]
@@ -640,10 +713,20 @@ pub struct DataBoxHeavyAccountCopyLogDetails {
     #[serde(rename = "accountName", default, skip_serializing_if = "Option::is_none")]
     pub account_name: Option<String>,
     #[doc = "Link for copy logs."]
-    #[serde(rename = "copyLogLink", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyLogLink",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_log_link: Vec<String>,
     #[doc = "Link for copy verbose logs. This will be set only when the LogCollectionLevel is set to verbose."]
-    #[serde(rename = "copyVerboseLogLink", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyVerboseLogLink",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_verbose_log_link: Vec<String>,
 }
 impl DataBoxHeavyAccountCopyLogDetails {
@@ -662,7 +745,12 @@ pub struct DataBoxHeavyJobDetails {
     #[serde(flatten)]
     pub job_details: JobDetails,
     #[doc = "Copy progress per account."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<CopyProgress>,
     #[doc = "Set Device password for unlocking Databox Heavy. Should not be passed for TransferType:ExportFromAzure jobs. If this is not passed, the service will generate password itself. This will not be returned in Get Call. Password Requirements :  Password must be minimum of 12 and maximum of 64 characters. Password must have at least one uppercase alphabet, one number and one special character. Password cannot have the following characters : IilLoO0 Password can have only alphabets, numbers and these characters : @#\\-$%^!+=;:_()]+"]
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
@@ -683,7 +771,12 @@ pub struct DataBoxHeavyJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secret objects for a databox heavy job."]
-    #[serde(rename = "cabinetPodSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cabinetPodSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cabinet_pod_secrets: Vec<DataBoxHeavySecret>,
 }
 impl DataBoxHeavyJobSecrets {
@@ -704,13 +797,23 @@ pub struct DataBoxHeavySecret {
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
     pub device_password: Option<String>,
     #[doc = "Network configuration of the appliance."]
-    #[serde(rename = "networkConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_configurations: Vec<ApplianceNetworkConfiguration>,
     #[doc = "The base 64 encoded public key to authenticate with the device"]
     #[serde(rename = "encodedValidationCertPubKey", default, skip_serializing_if = "Option::is_none")]
     pub encoded_validation_cert_pub_key: Option<String>,
     #[doc = "Per account level access credentials."]
-    #[serde(rename = "accountCredentialDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accountCredentialDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub account_credential_details: Vec<AccountCredentialDetails>,
 }
 impl DataBoxHeavySecret {
@@ -724,7 +827,12 @@ pub struct DataBoxJobDetails {
     #[serde(flatten)]
     pub job_details: JobDetails,
     #[doc = "Copy progress per storage account."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<CopyProgress>,
     #[doc = "Set Device password for unlocking Databox. Should not be passed for TransferType:ExportFromAzure jobs. If this is not passed, the service will generate password itself. This will not be returned in Get Call. Password Requirements :  Password must be minimum of 12 and maximum of 64 characters. Password must have at least one uppercase alphabet, one number and one special character. Password cannot have the following characters : IilLoO0 Password can have only alphabets, numbers and these characters : @#\\-$%^!+=;:_()]+"]
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
@@ -762,13 +870,23 @@ pub struct DataBoxSecret {
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
     pub device_password: Option<String>,
     #[doc = "Network configuration of the appliance."]
-    #[serde(rename = "networkConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_configurations: Vec<ApplianceNetworkConfiguration>,
     #[doc = "The base 64 encoded public key to authenticate with the device"]
     #[serde(rename = "encodedValidationCertPubKey", default, skip_serializing_if = "Option::is_none")]
     pub encoded_validation_cert_pub_key: Option<String>,
     #[doc = "Per account level access credentials."]
-    #[serde(rename = "accountCredentialDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accountCredentialDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub account_credential_details: Vec<AccountCredentialDetails>,
 }
 impl DataBoxSecret {
@@ -845,10 +963,20 @@ pub struct DataTransferDetailsValidationRequest {
     #[serde(flatten)]
     pub validation_input_request: ValidationInputRequest,
     #[doc = "List of DataTransfer details to be used to export data from azure."]
-    #[serde(rename = "dataExportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataExportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_export_details: Vec<DataExportDetails>,
     #[doc = "List of DataTransfer details to be used to import data to azure."]
-    #[serde(rename = "dataImportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataImportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_import_details: Vec<DataImportDetails>,
     #[doc = "Device type."]
     #[serde(rename = "deviceType")]
@@ -921,7 +1049,12 @@ pub struct DataboxJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secret objects for a job."]
-    #[serde(rename = "podSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "podSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pod_secrets: Vec<DataBoxSecret>,
 }
 impl DataboxJobSecrets {
@@ -1019,7 +1152,11 @@ pub mod encryption_preferences {
 pub struct ErrorDetail {
     pub code: String,
     pub message: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Details>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
@@ -1105,7 +1242,12 @@ impl JobDeliveryInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct JobDetails {
     #[doc = "List of stages that run in the job."]
-    #[serde(rename = "jobStages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobStages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_stages: Vec<JobStages>,
     #[doc = "Contact Details."]
     #[serde(rename = "contactDetails")]
@@ -1120,10 +1262,20 @@ pub struct JobDetails {
     #[serde(rename = "returnPackage", default, skip_serializing_if = "Option::is_none")]
     pub return_package: Option<PackageShippingDetails>,
     #[doc = "Details of the data to be imported into azure."]
-    #[serde(rename = "dataImportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataImportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_import_details: Vec<DataImportDetails>,
     #[doc = "Details of the data to be exported from azure."]
-    #[serde(rename = "dataExportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataExportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_export_details: Vec<DataExportDetails>,
     #[doc = "Indicates the type of job details."]
     #[serde(rename = "jobDetailsType")]
@@ -1132,7 +1284,12 @@ pub struct JobDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub preferences: Option<Preferences>,
     #[doc = "List of copy log details."]
-    #[serde(rename = "copyLogDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyLogDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_log_details: Vec<CopyLogDetails>,
     #[doc = "Shared access key to download the return shipment label"]
     #[serde(rename = "reverseShipmentLabelSasKey", default, skip_serializing_if = "Option::is_none")]
@@ -1147,7 +1304,11 @@ pub struct JobDetails {
     #[serde(rename = "expectedDataSizeInTeraBytes", default, skip_serializing_if = "Option::is_none")]
     pub expected_data_size_in_tera_bytes: Option<i32>,
     #[doc = "Available actions on the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Last Mitigation Action Performed On Job"]
     #[serde(rename = "lastMitigationActionOnJob", default, skip_serializing_if = "Option::is_none")]
@@ -1328,7 +1489,11 @@ impl JobResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobResourceList {
     #[doc = "List of job resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResource>,
     #[doc = "Link for the next set of job resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1655,7 +1820,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link for the next set of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1702,7 +1871,12 @@ impl PackageShippingDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Preferences {
     #[doc = "Preferred data center region."]
-    #[serde(rename = "preferredDataCenterRegion", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preferredDataCenterRegion",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub preferred_data_center_region: Vec<String>,
     #[doc = "Preferences related to the shipment logistics of the sku"]
     #[serde(rename = "transportPreferences", default, skip_serializing_if = "Option::is_none")]
@@ -1885,7 +2059,12 @@ pub mod schedule_availability_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScheduleAvailabilityResponse {
     #[doc = "List of dates available to schedule"]
-    #[serde(rename = "availableDates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableDates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_dates: Vec<time::OffsetDateTime>,
 }
 impl ScheduleAvailabilityResponse {
@@ -1909,7 +2088,12 @@ pub struct ShareCredentialDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub password: Option<String>,
     #[doc = "Access protocols supported on the device."]
-    #[serde(rename = "supportedAccessProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAccessProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_access_protocols: Vec<String>,
 }
 impl ShareCredentialDetails {
@@ -2194,16 +2378,30 @@ impl SkuInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuProperties {
     #[doc = "The map of data location to service location."]
-    #[serde(rename = "dataLocationToServiceLocationMap", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataLocationToServiceLocationMap",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_location_to_service_location_map: Vec<DataLocationToServiceLocationMap>,
     #[doc = "Capacity of the sku."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<SkuCapacity>,
     #[doc = "Cost of the Sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "Api versions that support this Sku."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Reason why the Sku is disabled."]
     #[serde(rename = "disabledReason", default, skip_serializing_if = "Option::is_none")]
@@ -2392,7 +2590,12 @@ pub struct TransferFilterDetails {
     #[serde(rename = "azureFileFilterDetails", default, skip_serializing_if = "Option::is_none")]
     pub azure_file_filter_details: Option<AzureFileFilterDetails>,
     #[doc = "Details of the filter files to be used for data transfer."]
-    #[serde(rename = "filterFileDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filterFileDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filter_file_details: Vec<FilterFileDetails>,
 }
 impl TransferFilterDetails {
@@ -2466,7 +2669,12 @@ pub mod transport_availability_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransportAvailabilityResponse {
     #[doc = "List of transport availability details for given region"]
-    #[serde(rename = "transportAvailabilityDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "transportAvailabilityDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transport_availability_details: Vec<TransportAvailabilityDetails>,
 }
 impl TransportAvailabilityResponse {
@@ -2514,7 +2722,11 @@ impl UnencryptedCredentials {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UnencryptedCredentialsList {
     #[doc = "List of unencrypted credentials."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UnencryptedCredentials>,
     #[doc = "Link for the next set of unencrypted credentials."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2731,7 +2943,12 @@ pub struct ValidationResponseProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<validation_response_properties::Status>,
     #[doc = "List of response details contain validationType and its response as key and value respectively."]
-    #[serde(rename = "individualResponseDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "individualResponseDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub individual_response_details: Vec<ValidationInputResponse>,
 }
 impl ValidationResponseProperties {
diff --git a/services/mgmt/databox/src/package_2021_08_preview/models.rs b/services/mgmt/databox/src/package_2021_08_preview/models.rs
index 5c0a7d4e10..5549e04052 100644
--- a/services/mgmt/databox/src/package_2021_08_preview/models.rs
+++ b/services/mgmt/databox/src/package_2021_08_preview/models.rs
@@ -16,7 +16,12 @@ pub struct AccountCredentialDetails {
     #[serde(rename = "accountConnectionString", default, skip_serializing_if = "Option::is_none")]
     pub account_connection_string: Option<String>,
     #[doc = "Per share level unencrypted access credentials."]
-    #[serde(rename = "shareCredentialDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareCredentialDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_credential_details: Vec<ShareCredentialDetails>,
 }
 impl AccountCredentialDetails {
@@ -69,7 +74,12 @@ pub struct AddressValidationProperties {
     #[serde(rename = "validationStatus", default, skip_serializing_if = "Option::is_none")]
     pub validation_status: Option<address_validation_properties::ValidationStatus>,
     #[doc = "List of alternate addresses."]
-    #[serde(rename = "alternateAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_addresses: Vec<ShippingAddress>,
 }
 impl AddressValidationProperties {
@@ -150,7 +160,12 @@ pub struct AvailableSkuRequest {
     #[doc = "Location for data transfer. For locations check: https://management.azure.com/subscriptions/SUBSCRIPTIONID/locations?api-version=2018-01-01"]
     pub location: String,
     #[doc = "Sku Names to filter for available skus"]
-    #[serde(rename = "skuNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_names: Vec<String>,
 }
 impl AvailableSkuRequest {
@@ -176,7 +191,11 @@ pub mod available_sku_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableSkusResult {
     #[doc = "List of available skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuInformation>,
     #[doc = "Link for the next set of skus."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -197,13 +216,28 @@ impl AvailableSkusResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureFileFilterDetails {
     #[doc = "Prefix list of the Azure files to be transferred."]
-    #[serde(rename = "filePrefixList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filePrefixList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_prefix_list: Vec<String>,
     #[doc = "List of full path of the files to be transferred."]
-    #[serde(rename = "filePathList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filePathList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_path_list: Vec<String>,
     #[doc = "List of file shares to be transferred."]
-    #[serde(rename = "fileShareList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fileShareList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_share_list: Vec<String>,
 }
 impl AzureFileFilterDetails {
@@ -215,13 +249,28 @@ impl AzureFileFilterDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobFilterDetails {
     #[doc = "Prefix list of the Azure blobs to be transferred."]
-    #[serde(rename = "blobPrefixList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobPrefixList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_prefix_list: Vec<String>,
     #[doc = "List of full path of the blobs to be transferred."]
-    #[serde(rename = "blobPathList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobPathList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_path_list: Vec<String>,
     #[doc = "List of blob containers to be transferred."]
-    #[serde(rename = "containerList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_list: Vec<String>,
 }
 impl BlobFilterDetails {
@@ -253,10 +302,19 @@ pub struct CloudError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Cloud error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudError>,
     #[doc = "Cloud error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<AdditionalErrorInfo>,
 }
 impl CloudError {
@@ -282,7 +340,12 @@ pub struct ContactDetails {
     #[serde(rename = "emailList")]
     pub email_list: Vec<String>,
     #[doc = "Notification preference for a job stage."]
-    #[serde(rename = "notificationPreference", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationPreference",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_preference: Vec<NotificationPreference>,
 }
 impl ContactDetails {
@@ -464,7 +527,12 @@ pub struct CustomerDiskJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secrets object for that device."]
-    #[serde(rename = "diskSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_secrets: Vec<DiskSecret>,
     #[doc = "Carrier Account Number of the customer"]
     #[serde(rename = "carrierAccountNumber", default, skip_serializing_if = "Option::is_none")]
@@ -664,7 +732,12 @@ pub struct DataBoxCustomerDiskJobDetails {
     #[serde(rename = "exportDiskDetailsCollection", default, skip_serializing_if = "Option::is_none")]
     pub export_disk_details_collection: Option<serde_json::Value>,
     #[doc = "Copy progress per disk."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<DataBoxCustomerDiskCopyProgress>,
     #[doc = "package carrier info"]
     #[serde(rename = "deliverToDcPackageDetails", default, skip_serializing_if = "Option::is_none")]
@@ -818,7 +891,12 @@ pub struct DataBoxDiskJobDetails {
     #[serde(rename = "preferredDisks", default, skip_serializing_if = "Option::is_none")]
     pub preferred_disks: Option<serde_json::Value>,
     #[doc = "Copy progress per disk."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<DataBoxDiskCopyProgress>,
     #[doc = "Contains the map of disk serial number to the disk size being used for the job. Is returned only after the disks are shipped to the customer."]
     #[serde(rename = "disksAndSizeDetails", default, skip_serializing_if = "Option::is_none")]
@@ -844,7 +922,12 @@ pub struct DataBoxDiskJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secrets object for that device."]
-    #[serde(rename = "diskSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_secrets: Vec<DiskSecret>,
     #[doc = "PassKey for the disk Job."]
     #[serde(rename = "passKey", default, skip_serializing_if = "Option::is_none")]
@@ -872,10 +955,20 @@ pub struct DataBoxHeavyAccountCopyLogDetails {
     #[serde(rename = "accountName", default, skip_serializing_if = "Option::is_none")]
     pub account_name: Option<String>,
     #[doc = "Link for copy logs."]
-    #[serde(rename = "copyLogLink", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyLogLink",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_log_link: Vec<String>,
     #[doc = "Link for copy verbose logs. This will be set only when the LogCollectionLevel is set to verbose."]
-    #[serde(rename = "copyVerboseLogLink", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyVerboseLogLink",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_verbose_log_link: Vec<String>,
 }
 impl DataBoxHeavyAccountCopyLogDetails {
@@ -894,7 +987,12 @@ pub struct DataBoxHeavyJobDetails {
     #[serde(flatten)]
     pub job_details: JobDetails,
     #[doc = "Copy progress per account."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<CopyProgress>,
     #[doc = "Set Device password for unlocking Databox Heavy. Should not be passed for TransferType:ExportFromAzure jobs. If this is not passed, the service will generate password itself. This will not be returned in Get Call. Password Requirements :  Password must be minimum of 12 and maximum of 64 characters. Password must have at least one uppercase alphabet, one number and one special character. Password cannot have the following characters : IilLoO0 Password can have only alphabets, numbers and these characters : @#\\-$%^!+=;:_()]+"]
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
@@ -915,7 +1013,12 @@ pub struct DataBoxHeavyJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secret objects for a databox heavy job."]
-    #[serde(rename = "cabinetPodSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cabinetPodSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cabinet_pod_secrets: Vec<DataBoxHeavySecret>,
 }
 impl DataBoxHeavyJobSecrets {
@@ -936,13 +1039,23 @@ pub struct DataBoxHeavySecret {
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
     pub device_password: Option<String>,
     #[doc = "Network configuration of the appliance."]
-    #[serde(rename = "networkConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_configurations: Vec<ApplianceNetworkConfiguration>,
     #[doc = "The base 64 encoded public key to authenticate with the device"]
     #[serde(rename = "encodedValidationCertPubKey", default, skip_serializing_if = "Option::is_none")]
     pub encoded_validation_cert_pub_key: Option<String>,
     #[doc = "Per account level access credentials."]
-    #[serde(rename = "accountCredentialDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accountCredentialDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub account_credential_details: Vec<AccountCredentialDetails>,
 }
 impl DataBoxHeavySecret {
@@ -956,7 +1069,12 @@ pub struct DataBoxJobDetails {
     #[serde(flatten)]
     pub job_details: JobDetails,
     #[doc = "Copy progress per storage account."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<CopyProgress>,
     #[doc = "Set Device password for unlocking Databox. Should not be passed for TransferType:ExportFromAzure jobs. If this is not passed, the service will generate password itself. This will not be returned in Get Call. Password Requirements :  Password must be minimum of 12 and maximum of 64 characters. Password must have at least one uppercase alphabet, one number and one special character. Password cannot have the following characters : IilLoO0 Password can have only alphabets, numbers and these characters : @#\\-$%^!+=;:_()]+"]
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
@@ -994,13 +1112,23 @@ pub struct DataBoxSecret {
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
     pub device_password: Option<String>,
     #[doc = "Network configuration of the appliance."]
-    #[serde(rename = "networkConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_configurations: Vec<ApplianceNetworkConfiguration>,
     #[doc = "The base 64 encoded public key to authenticate with the device"]
     #[serde(rename = "encodedValidationCertPubKey", default, skip_serializing_if = "Option::is_none")]
     pub encoded_validation_cert_pub_key: Option<String>,
     #[doc = "Per account level access credentials."]
-    #[serde(rename = "accountCredentialDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accountCredentialDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub account_credential_details: Vec<AccountCredentialDetails>,
 }
 impl DataBoxSecret {
@@ -1097,10 +1225,20 @@ pub struct DataTransferDetailsValidationRequest {
     #[serde(flatten)]
     pub validation_input_request: ValidationInputRequest,
     #[doc = "List of DataTransfer details to be used to export data from azure."]
-    #[serde(rename = "dataExportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataExportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_export_details: Vec<DataExportDetails>,
     #[doc = "List of DataTransfer details to be used to import data to azure."]
-    #[serde(rename = "dataImportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataImportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_import_details: Vec<DataImportDetails>,
     #[doc = "Device type."]
     #[serde(rename = "deviceType")]
@@ -1174,7 +1312,12 @@ pub struct DataboxJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secret objects for a job."]
-    #[serde(rename = "podSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "podSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pod_secrets: Vec<DataBoxSecret>,
 }
 impl DataboxJobSecrets {
@@ -1303,7 +1446,12 @@ pub struct DatacenterAddressResponse {
     #[serde(rename = "datacenterAddressType")]
     pub datacenter_address_type: datacenter_address_response::DatacenterAddressType,
     #[doc = "List of supported carriers for return shipment."]
-    #[serde(rename = "supportedCarriersForReturnShipment", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedCarriersForReturnShipment",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_carriers_for_return_shipment: Vec<String>,
     #[doc = "Azure Location where the Data Center serves primarily."]
     #[serde(rename = "dataCenterAzureLocation", default, skip_serializing_if = "Option::is_none")]
@@ -1414,7 +1562,11 @@ pub mod encryption_preferences {
 pub struct ErrorDetail {
     pub code: String,
     pub message: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Details>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
@@ -1544,7 +1696,12 @@ impl JobDeliveryInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct JobDetails {
     #[doc = "List of stages that run in the job."]
-    #[serde(rename = "jobStages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobStages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_stages: Vec<JobStages>,
     #[doc = "Contact Details."]
     #[serde(rename = "contactDetails")]
@@ -1559,10 +1716,20 @@ pub struct JobDetails {
     #[serde(rename = "returnPackage", default, skip_serializing_if = "Option::is_none")]
     pub return_package: Option<PackageShippingDetails>,
     #[doc = "Details of the data to be imported into azure."]
-    #[serde(rename = "dataImportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataImportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_import_details: Vec<DataImportDetails>,
     #[doc = "Details of the data to be exported from azure."]
-    #[serde(rename = "dataExportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataExportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_export_details: Vec<DataExportDetails>,
     #[doc = "Indicates the type of job details."]
     #[serde(rename = "jobDetailsType")]
@@ -1571,7 +1738,12 @@ pub struct JobDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub preferences: Option<Preferences>,
     #[doc = "List of copy log details."]
-    #[serde(rename = "copyLogDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyLogDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_log_details: Vec<CopyLogDetails>,
     #[doc = "Shared access key to download the return shipment label"]
     #[serde(rename = "reverseShipmentLabelSasKey", default, skip_serializing_if = "Option::is_none")]
@@ -1586,7 +1758,11 @@ pub struct JobDetails {
     #[serde(rename = "expectedDataSizeInTeraBytes", default, skip_serializing_if = "Option::is_none")]
     pub expected_data_size_in_tera_bytes: Option<i32>,
     #[doc = "Available actions on the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Last Mitigation Action Performed On Job"]
     #[serde(rename = "lastMitigationActionOnJob", default, skip_serializing_if = "Option::is_none")]
@@ -2023,7 +2199,11 @@ impl JobResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobResourceList {
     #[doc = "List of job resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResource>,
     #[doc = "Link for the next set of job resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2465,7 +2645,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link for the next set of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2545,7 +2729,12 @@ impl PackageShippingDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Preferences {
     #[doc = "Preferred data center region."]
-    #[serde(rename = "preferredDataCenterRegion", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preferredDataCenterRegion",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub preferred_data_center_region: Vec<String>,
     #[doc = "Preferences related to the shipment logistics of the sku"]
     #[serde(rename = "transportPreferences", default, skip_serializing_if = "Option::is_none")]
@@ -2736,7 +2925,12 @@ pub mod schedule_availability_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScheduleAvailabilityResponse {
     #[doc = "List of dates available to schedule"]
-    #[serde(rename = "availableDates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableDates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_dates: Vec<time::OffsetDateTime>,
 }
 impl ScheduleAvailabilityResponse {
@@ -2760,7 +2954,12 @@ pub struct ShareCredentialDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub password: Option<String>,
     #[doc = "Access protocols supported on the device."]
-    #[serde(rename = "supportedAccessProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAccessProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_access_protocols: Vec<String>,
 }
 impl ShareCredentialDetails {
@@ -3047,16 +3246,30 @@ impl SkuInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuProperties {
     #[doc = "The map of data location to service location."]
-    #[serde(rename = "dataLocationToServiceLocationMap", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataLocationToServiceLocationMap",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_location_to_service_location_map: Vec<DataLocationToServiceLocationMap>,
     #[doc = "Capacity of the sku."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<SkuCapacity>,
     #[doc = "Cost of the Sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "Api versions that support this Sku."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Reason why the Sku is disabled."]
     #[serde(rename = "disabledReason", default, skip_serializing_if = "Option::is_none")]
@@ -3245,7 +3458,12 @@ pub struct TransferFilterDetails {
     #[serde(rename = "azureFileFilterDetails", default, skip_serializing_if = "Option::is_none")]
     pub azure_file_filter_details: Option<AzureFileFilterDetails>,
     #[doc = "Details of the filter files to be used for data transfer."]
-    #[serde(rename = "filterFileDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filterFileDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filter_file_details: Vec<FilterFileDetails>,
 }
 impl TransferFilterDetails {
@@ -3320,7 +3538,12 @@ pub mod transport_availability_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransportAvailabilityResponse {
     #[doc = "List of transport availability details for given region"]
-    #[serde(rename = "transportAvailabilityDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "transportAvailabilityDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transport_availability_details: Vec<TransportAvailabilityDetails>,
 }
 impl TransportAvailabilityResponse {
@@ -3368,7 +3591,11 @@ impl UnencryptedCredentials {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UnencryptedCredentialsList {
     #[doc = "List of unencrypted credentials."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UnencryptedCredentials>,
     #[doc = "Link for the next set of unencrypted credentials."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3589,7 +3816,12 @@ pub struct ValidationResponseProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<validation_response_properties::Status>,
     #[doc = "List of response details contain validationType and its response as key and value respectively."]
-    #[serde(rename = "individualResponseDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "individualResponseDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub individual_response_details: Vec<ValidationInputResponse>,
 }
 impl ValidationResponseProperties {
diff --git a/services/mgmt/databox/src/package_2021_12/models.rs b/services/mgmt/databox/src/package_2021_12/models.rs
index 8a660cd9ba..56199f5116 100644
--- a/services/mgmt/databox/src/package_2021_12/models.rs
+++ b/services/mgmt/databox/src/package_2021_12/models.rs
@@ -16,7 +16,12 @@ pub struct AccountCredentialDetails {
     #[serde(rename = "accountConnectionString", default, skip_serializing_if = "Option::is_none")]
     pub account_connection_string: Option<String>,
     #[doc = "Per share level unencrypted access credentials."]
-    #[serde(rename = "shareCredentialDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareCredentialDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_credential_details: Vec<ShareCredentialDetails>,
 }
 impl AccountCredentialDetails {
@@ -69,7 +74,12 @@ pub struct AddressValidationProperties {
     #[serde(rename = "validationStatus", default, skip_serializing_if = "Option::is_none")]
     pub validation_status: Option<address_validation_properties::ValidationStatus>,
     #[doc = "List of alternate addresses."]
-    #[serde(rename = "alternateAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_addresses: Vec<ShippingAddress>,
 }
 impl AddressValidationProperties {
@@ -150,7 +160,12 @@ pub struct AvailableSkuRequest {
     #[doc = "Location for data transfer. For locations check: https://management.azure.com/subscriptions/SUBSCRIPTIONID/locations?api-version=2018-01-01"]
     pub location: String,
     #[doc = "Sku Names to filter for available skus"]
-    #[serde(rename = "skuNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_names: Vec<String>,
 }
 impl AvailableSkuRequest {
@@ -176,7 +191,11 @@ pub mod available_sku_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableSkusResult {
     #[doc = "List of available skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuInformation>,
     #[doc = "Link for the next set of skus."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -197,13 +216,28 @@ impl AvailableSkusResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureFileFilterDetails {
     #[doc = "Prefix list of the Azure files to be transferred."]
-    #[serde(rename = "filePrefixList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filePrefixList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_prefix_list: Vec<String>,
     #[doc = "List of full path of the files to be transferred."]
-    #[serde(rename = "filePathList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filePathList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_path_list: Vec<String>,
     #[doc = "List of file shares to be transferred."]
-    #[serde(rename = "fileShareList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fileShareList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_share_list: Vec<String>,
 }
 impl AzureFileFilterDetails {
@@ -215,13 +249,28 @@ impl AzureFileFilterDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobFilterDetails {
     #[doc = "Prefix list of the Azure blobs to be transferred."]
-    #[serde(rename = "blobPrefixList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobPrefixList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_prefix_list: Vec<String>,
     #[doc = "List of full path of the blobs to be transferred."]
-    #[serde(rename = "blobPathList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobPathList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_path_list: Vec<String>,
     #[doc = "List of blob containers to be transferred."]
-    #[serde(rename = "containerList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_list: Vec<String>,
 }
 impl BlobFilterDetails {
@@ -244,13 +293,22 @@ impl CancellationReason {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudError {
     #[doc = "Gets or sets additional error info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<AdditionalErrorInfo>,
     #[doc = "Error code."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "Gets or sets details for the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudError>,
     #[doc = "The error message parsed from the body of the http error response."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -282,7 +340,12 @@ pub struct ContactDetails {
     #[serde(rename = "emailList")]
     pub email_list: Vec<String>,
     #[doc = "Notification preference for a job stage."]
-    #[serde(rename = "notificationPreference", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationPreference",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_preference: Vec<NotificationPreference>,
 }
 impl ContactDetails {
@@ -464,7 +527,12 @@ pub struct CustomerDiskJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secrets object for that device."]
-    #[serde(rename = "diskSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_secrets: Vec<DiskSecret>,
     #[doc = "Carrier Account Number of the customer"]
     #[serde(rename = "carrierAccountNumber", default, skip_serializing_if = "Option::is_none")]
@@ -664,7 +732,12 @@ pub struct DataBoxCustomerDiskJobDetails {
     #[serde(rename = "exportDiskDetailsCollection", default, skip_serializing_if = "Option::is_none")]
     pub export_disk_details_collection: Option<serde_json::Value>,
     #[doc = "Copy progress per disk."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<DataBoxCustomerDiskCopyProgress>,
     #[doc = "package carrier info"]
     #[serde(rename = "deliverToDcPackageDetails", default, skip_serializing_if = "Option::is_none")]
@@ -938,10 +1011,20 @@ pub struct DataBoxDiskJobDetails {
     #[serde(rename = "preferredDisks", default, skip_serializing_if = "Option::is_none")]
     pub preferred_disks: Option<serde_json::Value>,
     #[doc = "Copy progress per disk."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<DataBoxDiskCopyProgress>,
     #[doc = "Copy progress per disk."]
-    #[serde(rename = "granularCopyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "granularCopyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub granular_copy_progress: Vec<DataBoxDiskGranularCopyProgress>,
     #[doc = "Contains the map of disk serial number to the disk size being used for the job. Is returned only after the disks are shipped to the customer."]
     #[serde(rename = "disksAndSizeDetails", default, skip_serializing_if = "Option::is_none")]
@@ -968,7 +1051,12 @@ pub struct DataBoxDiskJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secrets object for that device."]
-    #[serde(rename = "diskSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_secrets: Vec<DiskSecret>,
     #[doc = "PassKey for the disk Job."]
     #[serde(rename = "passKey", default, skip_serializing_if = "Option::is_none")]
@@ -996,10 +1084,20 @@ pub struct DataBoxHeavyAccountCopyLogDetails {
     #[serde(rename = "accountName", default, skip_serializing_if = "Option::is_none")]
     pub account_name: Option<String>,
     #[doc = "Link for copy logs."]
-    #[serde(rename = "copyLogLink", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyLogLink",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_log_link: Vec<String>,
     #[doc = "Link for copy verbose logs. This will be set only when the LogCollectionLevel is set to verbose."]
-    #[serde(rename = "copyVerboseLogLink", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyVerboseLogLink",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_verbose_log_link: Vec<String>,
 }
 impl DataBoxHeavyAccountCopyLogDetails {
@@ -1018,7 +1116,12 @@ pub struct DataBoxHeavyJobDetails {
     #[serde(flatten)]
     pub job_details: JobDetails,
     #[doc = "Copy progress per account."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<CopyProgress>,
     #[doc = "Set Device password for unlocking Databox Heavy. Should not be passed for TransferType:ExportFromAzure jobs. If this is not passed, the service will generate password itself. This will not be returned in Get Call. Password Requirements :  Password must be minimum of 12 and maximum of 64 characters. Password must have at least one uppercase alphabet, one number and one special character. Password cannot have the following characters : IilLoO0 Password can have only alphabets, numbers and these characters : @#\\-$%^!+=;:_()]+"]
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
@@ -1039,7 +1142,12 @@ pub struct DataBoxHeavyJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secret objects for a databox heavy job."]
-    #[serde(rename = "cabinetPodSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cabinetPodSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cabinet_pod_secrets: Vec<DataBoxHeavySecret>,
 }
 impl DataBoxHeavyJobSecrets {
@@ -1060,13 +1168,23 @@ pub struct DataBoxHeavySecret {
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
     pub device_password: Option<String>,
     #[doc = "Network configuration of the appliance."]
-    #[serde(rename = "networkConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_configurations: Vec<ApplianceNetworkConfiguration>,
     #[doc = "The base 64 encoded public key to authenticate with the device"]
     #[serde(rename = "encodedValidationCertPubKey", default, skip_serializing_if = "Option::is_none")]
     pub encoded_validation_cert_pub_key: Option<String>,
     #[doc = "Per account level access credentials."]
-    #[serde(rename = "accountCredentialDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accountCredentialDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub account_credential_details: Vec<AccountCredentialDetails>,
 }
 impl DataBoxHeavySecret {
@@ -1080,7 +1198,12 @@ pub struct DataBoxJobDetails {
     #[serde(flatten)]
     pub job_details: JobDetails,
     #[doc = "Copy progress per storage account."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<CopyProgress>,
     #[doc = "Set Device password for unlocking Databox. Should not be passed for TransferType:ExportFromAzure jobs. If this is not passed, the service will generate password itself. This will not be returned in Get Call. Password Requirements :  Password must be minimum of 12 and maximum of 64 characters. Password must have at least one uppercase alphabet, one number and one special character. Password cannot have the following characters : IilLoO0 Password can have only alphabets, numbers and these characters : @#\\-$%^!+=;:_()]+"]
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
@@ -1118,13 +1241,23 @@ pub struct DataBoxSecret {
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
     pub device_password: Option<String>,
     #[doc = "Network configuration of the appliance."]
-    #[serde(rename = "networkConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_configurations: Vec<ApplianceNetworkConfiguration>,
     #[doc = "The base 64 encoded public key to authenticate with the device"]
     #[serde(rename = "encodedValidationCertPubKey", default, skip_serializing_if = "Option::is_none")]
     pub encoded_validation_cert_pub_key: Option<String>,
     #[doc = "Per account level access credentials."]
-    #[serde(rename = "accountCredentialDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accountCredentialDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub account_credential_details: Vec<AccountCredentialDetails>,
 }
 impl DataBoxSecret {
@@ -1221,10 +1354,20 @@ pub struct DataTransferDetailsValidationRequest {
     #[serde(flatten)]
     pub validation_input_request: ValidationInputRequest,
     #[doc = "List of DataTransfer details to be used to export data from azure."]
-    #[serde(rename = "dataExportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataExportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_export_details: Vec<DataExportDetails>,
     #[doc = "List of DataTransfer details to be used to import data to azure."]
-    #[serde(rename = "dataImportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataImportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_import_details: Vec<DataImportDetails>,
     #[doc = "Device type."]
     #[serde(rename = "deviceType")]
@@ -1298,7 +1441,12 @@ pub struct DataboxJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secret objects for a job."]
-    #[serde(rename = "podSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "podSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pod_secrets: Vec<DataBoxSecret>,
 }
 impl DataboxJobSecrets {
@@ -1427,7 +1575,12 @@ pub struct DatacenterAddressResponse {
     #[serde(rename = "datacenterAddressType")]
     pub datacenter_address_type: datacenter_address_response::DatacenterAddressType,
     #[doc = "List of supported carriers for return shipment."]
-    #[serde(rename = "supportedCarriersForReturnShipment", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedCarriersForReturnShipment",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_carriers_for_return_shipment: Vec<String>,
     #[doc = "Azure Location where the Data Center serves primarily."]
     #[serde(rename = "dataCenterAzureLocation", default, skip_serializing_if = "Option::is_none")]
@@ -1538,7 +1691,11 @@ pub mod encryption_preferences {
 pub struct ErrorDetail {
     pub code: String,
     pub message: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Details>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
@@ -1760,7 +1917,12 @@ impl JobDeliveryInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct JobDetails {
     #[doc = "List of stages that run in the job."]
-    #[serde(rename = "jobStages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobStages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_stages: Vec<JobStages>,
     #[doc = "Contact Details."]
     #[serde(rename = "contactDetails")]
@@ -1775,10 +1937,20 @@ pub struct JobDetails {
     #[serde(rename = "returnPackage", default, skip_serializing_if = "Option::is_none")]
     pub return_package: Option<PackageShippingDetails>,
     #[doc = "Details of the data to be imported into azure."]
-    #[serde(rename = "dataImportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataImportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_import_details: Vec<DataImportDetails>,
     #[doc = "Details of the data to be exported from azure."]
-    #[serde(rename = "dataExportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataExportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_export_details: Vec<DataExportDetails>,
     #[doc = "Indicates the type of job details."]
     #[serde(rename = "jobDetailsType")]
@@ -1787,7 +1959,12 @@ pub struct JobDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub preferences: Option<Preferences>,
     #[doc = "List of copy log details."]
-    #[serde(rename = "copyLogDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyLogDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_log_details: Vec<CopyLogDetails>,
     #[doc = "Shared access key to download the return shipment label"]
     #[serde(rename = "reverseShipmentLabelSasKey", default, skip_serializing_if = "Option::is_none")]
@@ -1802,7 +1979,11 @@ pub struct JobDetails {
     #[serde(rename = "expectedDataSizeInTeraBytes", default, skip_serializing_if = "Option::is_none")]
     pub expected_data_size_in_tera_bytes: Option<i32>,
     #[doc = "Available actions on the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Last Mitigation Action Performed On Job"]
     #[serde(rename = "lastMitigationActionOnJob", default, skip_serializing_if = "Option::is_none")]
@@ -2257,7 +2438,11 @@ impl JobResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobResourceList {
     #[doc = "List of job resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResource>,
     #[doc = "Link for the next set of job resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2704,7 +2889,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link for the next set of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2784,7 +2973,12 @@ impl PackageShippingDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Preferences {
     #[doc = "Preferred data center region."]
-    #[serde(rename = "preferredDataCenterRegion", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preferredDataCenterRegion",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub preferred_data_center_region: Vec<String>,
     #[doc = "Preferences related to the shipment logistics of the sku"]
     #[serde(rename = "transportPreferences", default, skip_serializing_if = "Option::is_none")]
@@ -2793,7 +2987,12 @@ pub struct Preferences {
     #[serde(rename = "encryptionPreferences", default, skip_serializing_if = "Option::is_none")]
     pub encryption_preferences: Option<EncryptionPreferences>,
     #[doc = "Preferences related to the Access Tier of storage accounts."]
-    #[serde(rename = "storageAccountAccessTierPreferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccountAccessTierPreferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_account_access_tier_preferences: Vec<String>,
 }
 impl Preferences {
@@ -2978,7 +3177,12 @@ pub mod schedule_availability_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScheduleAvailabilityResponse {
     #[doc = "List of dates available to schedule"]
-    #[serde(rename = "availableDates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableDates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_dates: Vec<time::OffsetDateTime>,
 }
 impl ScheduleAvailabilityResponse {
@@ -3002,7 +3206,12 @@ pub struct ShareCredentialDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub password: Option<String>,
     #[doc = "Access protocols supported on the device."]
-    #[serde(rename = "supportedAccessProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAccessProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_access_protocols: Vec<String>,
 }
 impl ShareCredentialDetails {
@@ -3289,16 +3498,30 @@ impl SkuInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuProperties {
     #[doc = "The map of data location to service location."]
-    #[serde(rename = "dataLocationToServiceLocationMap", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataLocationToServiceLocationMap",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_location_to_service_location_map: Vec<DataLocationToServiceLocationMap>,
     #[doc = "Capacity of the sku."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<SkuCapacity>,
     #[doc = "Cost of the Sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "Api versions that support this Sku."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Reason why the Sku is disabled."]
     #[serde(rename = "disabledReason", default, skip_serializing_if = "Option::is_none")]
@@ -3487,7 +3710,12 @@ pub struct TransferFilterDetails {
     #[serde(rename = "azureFileFilterDetails", default, skip_serializing_if = "Option::is_none")]
     pub azure_file_filter_details: Option<AzureFileFilterDetails>,
     #[doc = "Details of the filter files to be used for data transfer."]
-    #[serde(rename = "filterFileDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filterFileDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filter_file_details: Vec<FilterFileDetails>,
 }
 impl TransferFilterDetails {
@@ -3562,7 +3790,12 @@ pub mod transport_availability_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransportAvailabilityResponse {
     #[doc = "List of transport availability details for given region"]
-    #[serde(rename = "transportAvailabilityDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "transportAvailabilityDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transport_availability_details: Vec<TransportAvailabilityDetails>,
 }
 impl TransportAvailabilityResponse {
@@ -3610,7 +3843,11 @@ impl UnencryptedCredentials {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UnencryptedCredentialsList {
     #[doc = "List of unencrypted credentials."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UnencryptedCredentials>,
     #[doc = "Link for the next set of unencrypted credentials."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3831,7 +4068,12 @@ pub struct ValidationResponseProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<validation_response_properties::Status>,
     #[doc = "List of response details contain validationType and its response as key and value respectively."]
-    #[serde(rename = "individualResponseDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "individualResponseDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub individual_response_details: Vec<ValidationInputResponse>,
 }
 impl ValidationResponseProperties {
diff --git a/services/mgmt/databox/src/package_2022_02/models.rs b/services/mgmt/databox/src/package_2022_02/models.rs
index 7a3900e7d5..79774027d9 100644
--- a/services/mgmt/databox/src/package_2022_02/models.rs
+++ b/services/mgmt/databox/src/package_2022_02/models.rs
@@ -16,7 +16,12 @@ pub struct AccountCredentialDetails {
     #[serde(rename = "accountConnectionString", default, skip_serializing_if = "Option::is_none")]
     pub account_connection_string: Option<String>,
     #[doc = "Per share level unencrypted access credentials."]
-    #[serde(rename = "shareCredentialDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareCredentialDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_credential_details: Vec<ShareCredentialDetails>,
 }
 impl AccountCredentialDetails {
@@ -69,7 +74,12 @@ pub struct AddressValidationProperties {
     #[serde(rename = "validationStatus", default, skip_serializing_if = "Option::is_none")]
     pub validation_status: Option<address_validation_properties::ValidationStatus>,
     #[doc = "List of alternate addresses."]
-    #[serde(rename = "alternateAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_addresses: Vec<ShippingAddress>,
 }
 impl AddressValidationProperties {
@@ -150,7 +160,12 @@ pub struct AvailableSkuRequest {
     #[doc = "Location for data transfer. For locations check: https://management.azure.com/subscriptions/SUBSCRIPTIONID/locations?api-version=2018-01-01"]
     pub location: String,
     #[doc = "Sku Names to filter for available skus"]
-    #[serde(rename = "skuNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_names: Vec<String>,
 }
 impl AvailableSkuRequest {
@@ -176,7 +191,11 @@ pub mod available_sku_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableSkusResult {
     #[doc = "List of available skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuInformation>,
     #[doc = "Link for the next set of skus."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -197,13 +216,28 @@ impl AvailableSkusResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureFileFilterDetails {
     #[doc = "Prefix list of the Azure files to be transferred."]
-    #[serde(rename = "filePrefixList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filePrefixList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_prefix_list: Vec<String>,
     #[doc = "List of full path of the files to be transferred."]
-    #[serde(rename = "filePathList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filePathList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_path_list: Vec<String>,
     #[doc = "List of file shares to be transferred."]
-    #[serde(rename = "fileShareList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fileShareList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_share_list: Vec<String>,
 }
 impl AzureFileFilterDetails {
@@ -215,13 +249,28 @@ impl AzureFileFilterDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobFilterDetails {
     #[doc = "Prefix list of the Azure blobs to be transferred."]
-    #[serde(rename = "blobPrefixList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobPrefixList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_prefix_list: Vec<String>,
     #[doc = "List of full path of the blobs to be transferred."]
-    #[serde(rename = "blobPathList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobPathList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_path_list: Vec<String>,
     #[doc = "List of blob containers to be transferred."]
-    #[serde(rename = "containerList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_list: Vec<String>,
 }
 impl BlobFilterDetails {
@@ -244,13 +293,22 @@ impl CancellationReason {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudError {
     #[doc = "Gets or sets additional error info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<AdditionalErrorInfo>,
     #[doc = "Error code."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "Gets or sets details for the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudError>,
     #[doc = "The error message parsed from the body of the http error response."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -282,7 +340,12 @@ pub struct ContactDetails {
     #[serde(rename = "emailList")]
     pub email_list: Vec<String>,
     #[doc = "Notification preference for a job stage."]
-    #[serde(rename = "notificationPreference", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationPreference",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_preference: Vec<NotificationPreference>,
 }
 impl ContactDetails {
@@ -464,7 +527,12 @@ pub struct CustomerDiskJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secrets object for that device."]
-    #[serde(rename = "diskSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_secrets: Vec<DiskSecret>,
     #[doc = "Carrier Account Number of the customer"]
     #[serde(rename = "carrierAccountNumber", default, skip_serializing_if = "Option::is_none")]
@@ -664,7 +732,12 @@ pub struct DataBoxCustomerDiskJobDetails {
     #[serde(rename = "exportDiskDetailsCollection", default, skip_serializing_if = "Option::is_none")]
     pub export_disk_details_collection: Option<serde_json::Value>,
     #[doc = "Copy progress per disk."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<DataBoxCustomerDiskCopyProgress>,
     #[doc = "package carrier info"]
     #[serde(rename = "deliverToDcPackageDetails", default, skip_serializing_if = "Option::is_none")]
@@ -938,10 +1011,20 @@ pub struct DataBoxDiskJobDetails {
     #[serde(rename = "preferredDisks", default, skip_serializing_if = "Option::is_none")]
     pub preferred_disks: Option<serde_json::Value>,
     #[doc = "Copy progress per disk."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<DataBoxDiskCopyProgress>,
     #[doc = "Copy progress per disk."]
-    #[serde(rename = "granularCopyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "granularCopyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub granular_copy_progress: Vec<DataBoxDiskGranularCopyProgress>,
     #[doc = "Contains the map of disk serial number to the disk size being used for the job. Is returned only after the disks are shipped to the customer."]
     #[serde(rename = "disksAndSizeDetails", default, skip_serializing_if = "Option::is_none")]
@@ -968,7 +1051,12 @@ pub struct DataBoxDiskJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secrets object for that device."]
-    #[serde(rename = "diskSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_secrets: Vec<DiskSecret>,
     #[doc = "PassKey for the disk Job."]
     #[serde(rename = "passKey", default, skip_serializing_if = "Option::is_none")]
@@ -996,10 +1084,20 @@ pub struct DataBoxHeavyAccountCopyLogDetails {
     #[serde(rename = "accountName", default, skip_serializing_if = "Option::is_none")]
     pub account_name: Option<String>,
     #[doc = "Link for copy logs."]
-    #[serde(rename = "copyLogLink", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyLogLink",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_log_link: Vec<String>,
     #[doc = "Link for copy verbose logs. This will be set only when the LogCollectionLevel is set to verbose."]
-    #[serde(rename = "copyVerboseLogLink", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyVerboseLogLink",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_verbose_log_link: Vec<String>,
 }
 impl DataBoxHeavyAccountCopyLogDetails {
@@ -1018,7 +1116,12 @@ pub struct DataBoxHeavyJobDetails {
     #[serde(flatten)]
     pub job_details: JobDetails,
     #[doc = "Copy progress per account."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<CopyProgress>,
     #[doc = "Set Device password for unlocking Databox Heavy. Should not be passed for TransferType:ExportFromAzure jobs. If this is not passed, the service will generate password itself. This will not be returned in Get Call. Password Requirements :  Password must be minimum of 12 and maximum of 64 characters. Password must have at least one uppercase alphabet, one number and one special character. Password cannot have the following characters : IilLoO0 Password can have only alphabets, numbers and these characters : @#\\-$%^!+=;:_()]+"]
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
@@ -1039,7 +1142,12 @@ pub struct DataBoxHeavyJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secret objects for a databox heavy job."]
-    #[serde(rename = "cabinetPodSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cabinetPodSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cabinet_pod_secrets: Vec<DataBoxHeavySecret>,
 }
 impl DataBoxHeavyJobSecrets {
@@ -1060,13 +1168,23 @@ pub struct DataBoxHeavySecret {
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
     pub device_password: Option<String>,
     #[doc = "Network configuration of the appliance."]
-    #[serde(rename = "networkConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_configurations: Vec<ApplianceNetworkConfiguration>,
     #[doc = "The base 64 encoded public key to authenticate with the device"]
     #[serde(rename = "encodedValidationCertPubKey", default, skip_serializing_if = "Option::is_none")]
     pub encoded_validation_cert_pub_key: Option<String>,
     #[doc = "Per account level access credentials."]
-    #[serde(rename = "accountCredentialDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accountCredentialDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub account_credential_details: Vec<AccountCredentialDetails>,
 }
 impl DataBoxHeavySecret {
@@ -1080,7 +1198,12 @@ pub struct DataBoxJobDetails {
     #[serde(flatten)]
     pub job_details: JobDetails,
     #[doc = "Copy progress per storage account."]
-    #[serde(rename = "copyProgress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyProgress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_progress: Vec<CopyProgress>,
     #[doc = "Set Device password for unlocking Databox. Should not be passed for TransferType:ExportFromAzure jobs. If this is not passed, the service will generate password itself. This will not be returned in Get Call. Password Requirements :  Password must be minimum of 12 and maximum of 64 characters. Password must have at least one uppercase alphabet, one number and one special character. Password cannot have the following characters : IilLoO0 Password can have only alphabets, numbers and these characters : @#\\-$%^!+=;:_()]+"]
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
@@ -1118,13 +1241,23 @@ pub struct DataBoxSecret {
     #[serde(rename = "devicePassword", default, skip_serializing_if = "Option::is_none")]
     pub device_password: Option<String>,
     #[doc = "Network configuration of the appliance."]
-    #[serde(rename = "networkConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_configurations: Vec<ApplianceNetworkConfiguration>,
     #[doc = "The base 64 encoded public key to authenticate with the device"]
     #[serde(rename = "encodedValidationCertPubKey", default, skip_serializing_if = "Option::is_none")]
     pub encoded_validation_cert_pub_key: Option<String>,
     #[doc = "Per account level access credentials."]
-    #[serde(rename = "accountCredentialDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accountCredentialDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub account_credential_details: Vec<AccountCredentialDetails>,
 }
 impl DataBoxSecret {
@@ -1221,10 +1354,20 @@ pub struct DataTransferDetailsValidationRequest {
     #[serde(flatten)]
     pub validation_input_request: ValidationInputRequest,
     #[doc = "List of DataTransfer details to be used to export data from azure."]
-    #[serde(rename = "dataExportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataExportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_export_details: Vec<DataExportDetails>,
     #[doc = "List of DataTransfer details to be used to import data to azure."]
-    #[serde(rename = "dataImportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataImportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_import_details: Vec<DataImportDetails>,
     #[doc = "Device type."]
     #[serde(rename = "deviceType")]
@@ -1298,7 +1441,12 @@ pub struct DataboxJobSecrets {
     #[serde(flatten)]
     pub job_secrets: JobSecrets,
     #[doc = "Contains the list of secret objects for a job."]
-    #[serde(rename = "podSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "podSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pod_secrets: Vec<DataBoxSecret>,
 }
 impl DataboxJobSecrets {
@@ -1427,7 +1575,12 @@ pub struct DatacenterAddressResponse {
     #[serde(rename = "datacenterAddressType")]
     pub datacenter_address_type: datacenter_address_response::DatacenterAddressType,
     #[doc = "List of supported carriers for return shipment."]
-    #[serde(rename = "supportedCarriersForReturnShipment", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedCarriersForReturnShipment",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_carriers_for_return_shipment: Vec<String>,
     #[doc = "Azure Location where the Data Center serves primarily."]
     #[serde(rename = "dataCenterAzureLocation", default, skip_serializing_if = "Option::is_none")]
@@ -1573,7 +1726,11 @@ pub mod encryption_preferences {
 pub struct ErrorDetail {
     pub code: String,
     pub message: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Details>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
@@ -1795,7 +1952,12 @@ impl JobDeliveryInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct JobDetails {
     #[doc = "List of stages that run in the job."]
-    #[serde(rename = "jobStages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobStages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_stages: Vec<JobStages>,
     #[doc = "Contact Details."]
     #[serde(rename = "contactDetails")]
@@ -1810,10 +1972,20 @@ pub struct JobDetails {
     #[serde(rename = "returnPackage", default, skip_serializing_if = "Option::is_none")]
     pub return_package: Option<PackageShippingDetails>,
     #[doc = "Details of the data to be imported into azure."]
-    #[serde(rename = "dataImportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataImportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_import_details: Vec<DataImportDetails>,
     #[doc = "Details of the data to be exported from azure."]
-    #[serde(rename = "dataExportDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataExportDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_export_details: Vec<DataExportDetails>,
     #[doc = "Indicates the type of job details."]
     #[serde(rename = "jobDetailsType")]
@@ -1822,7 +1994,12 @@ pub struct JobDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub preferences: Option<Preferences>,
     #[doc = "List of copy log details."]
-    #[serde(rename = "copyLogDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "copyLogDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub copy_log_details: Vec<CopyLogDetails>,
     #[doc = "Shared access key to download the return shipment label"]
     #[serde(rename = "reverseShipmentLabelSasKey", default, skip_serializing_if = "Option::is_none")]
@@ -1840,7 +2017,11 @@ pub struct JobDetails {
     #[serde(rename = "expectedDataSizeInTeraBytes", default, skip_serializing_if = "Option::is_none")]
     pub expected_data_size_in_tera_bytes: Option<i32>,
     #[doc = "Available actions on the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Last Mitigation Action Performed On Job"]
     #[serde(rename = "lastMitigationActionOnJob", default, skip_serializing_if = "Option::is_none")]
@@ -2296,7 +2477,11 @@ impl JobResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobResourceList {
     #[doc = "List of job resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResource>,
     #[doc = "Link for the next set of job resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2743,7 +2928,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link for the next set of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2823,7 +3012,12 @@ impl PackageShippingDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Preferences {
     #[doc = "Preferred data center region."]
-    #[serde(rename = "preferredDataCenterRegion", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preferredDataCenterRegion",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub preferred_data_center_region: Vec<String>,
     #[doc = "Preferences related to the shipment logistics of the sku"]
     #[serde(rename = "transportPreferences", default, skip_serializing_if = "Option::is_none")]
@@ -2832,7 +3026,12 @@ pub struct Preferences {
     #[serde(rename = "encryptionPreferences", default, skip_serializing_if = "Option::is_none")]
     pub encryption_preferences: Option<EncryptionPreferences>,
     #[doc = "Preferences related to the Access Tier of storage accounts."]
-    #[serde(rename = "storageAccountAccessTierPreferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccountAccessTierPreferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_account_access_tier_preferences: Vec<String>,
 }
 impl Preferences {
@@ -3017,7 +3216,12 @@ pub mod schedule_availability_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScheduleAvailabilityResponse {
     #[doc = "List of dates available to schedule"]
-    #[serde(rename = "availableDates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableDates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_dates: Vec<time::OffsetDateTime>,
 }
 impl ScheduleAvailabilityResponse {
@@ -3041,7 +3245,12 @@ pub struct ShareCredentialDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub password: Option<String>,
     #[doc = "Access protocols supported on the device."]
-    #[serde(rename = "supportedAccessProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAccessProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_access_protocols: Vec<String>,
 }
 impl ShareCredentialDetails {
@@ -3328,16 +3537,30 @@ impl SkuInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuProperties {
     #[doc = "The map of data location to service location."]
-    #[serde(rename = "dataLocationToServiceLocationMap", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataLocationToServiceLocationMap",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_location_to_service_location_map: Vec<DataLocationToServiceLocationMap>,
     #[doc = "Capacity of the sku."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<SkuCapacity>,
     #[doc = "Cost of the Sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "Api versions that support this Sku."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Reason why the Sku is disabled."]
     #[serde(rename = "disabledReason", default, skip_serializing_if = "Option::is_none")]
@@ -3526,7 +3749,12 @@ pub struct TransferFilterDetails {
     #[serde(rename = "azureFileFilterDetails", default, skip_serializing_if = "Option::is_none")]
     pub azure_file_filter_details: Option<AzureFileFilterDetails>,
     #[doc = "Details of the filter files to be used for data transfer."]
-    #[serde(rename = "filterFileDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filterFileDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filter_file_details: Vec<FilterFileDetails>,
 }
 impl TransferFilterDetails {
@@ -3601,7 +3829,12 @@ pub mod transport_availability_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransportAvailabilityResponse {
     #[doc = "List of transport availability details for given region"]
-    #[serde(rename = "transportAvailabilityDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "transportAvailabilityDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transport_availability_details: Vec<TransportAvailabilityDetails>,
 }
 impl TransportAvailabilityResponse {
@@ -3649,7 +3882,11 @@ impl UnencryptedCredentials {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UnencryptedCredentialsList {
     #[doc = "List of unencrypted credentials."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UnencryptedCredentials>,
     #[doc = "Link for the next set of unencrypted credentials."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3870,7 +4107,12 @@ pub struct ValidationResponseProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<validation_response_properties::Status>,
     #[doc = "List of response details contain validationType and its response as key and value respectively."]
-    #[serde(rename = "individualResponseDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "individualResponseDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub individual_response_details: Vec<ValidationInputResponse>,
 }
 impl ValidationResponseProperties {
diff --git a/services/mgmt/databoxedge/src/package_2020_12_01/models.rs b/services/mgmt/databoxedge/src/package_2020_12_01/models.rs
index 4d6d022e08..fa3ba2207b 100644
--- a/services/mgmt/databoxedge/src/package_2020_12_01/models.rs
+++ b/services/mgmt/databoxedge/src/package_2020_12_01/models.rs
@@ -85,7 +85,11 @@ pub mod addon {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AddonList {
     #[doc = "The Value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Addon>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -178,7 +182,11 @@ impl AlertErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertList {
     #[doc = "The value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -650,7 +658,11 @@ impl BandwidthScheduleProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BandwidthSchedulesList {
     #[doc = "The list of bandwidth schedules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BandwidthSchedule>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -879,7 +891,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -975,7 +991,11 @@ impl Container {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerList {
     #[doc = "The list of containers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Container>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1386,7 +1406,11 @@ pub mod data_box_edge_device_extended_info_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataBoxEdgeDeviceList {
     #[doc = "The list of Data Box Edge/Gateway devices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataBoxEdgeDevice>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1461,7 +1485,12 @@ pub struct DataBoxEdgeDeviceProperties {
     #[serde(rename = "deviceHcsVersion", default, skip_serializing_if = "Option::is_none")]
     pub device_hcs_version: Option<String>,
     #[doc = "Type of compute roles configured."]
-    #[serde(rename = "configuredRoleTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configuredRoleTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configured_role_types: Vec<String>,
     #[doc = "The number of nodes in the cluster."]
     #[serde(rename = "nodeCount", default, skip_serializing_if = "Option::is_none")]
@@ -1614,16 +1643,34 @@ pub struct DataBoxEdgeSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub family: Option<String>,
     #[doc = "Availability of the Sku for the region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The API versions in which Sku is available."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Availability of the Sku for the location/zone/site."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfo>,
     #[doc = "The pricing info of the Sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "Sku can be signed up by customer or not."]
     #[serde(rename = "signupOption", default, skip_serializing_if = "Option::is_none")]
@@ -1635,10 +1682,19 @@ pub struct DataBoxEdgeSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub availability: Option<data_box_edge_sku::Availability>,
     #[doc = "List of Shipment Types supported by this SKU"]
-    #[serde(rename = "shipmentTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shipmentTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shipment_types: Vec<String>,
     #[doc = "The capability info of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl DataBoxEdgeSku {
@@ -1893,7 +1949,11 @@ pub mod data_box_edge_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataBoxEdgeSkuList {
     #[doc = "List of ResourceType Sku"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataBoxEdgeSku>,
     #[doc = "Links to the next set of results"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2440,7 +2500,12 @@ pub struct IoTRoleProperties {
     #[serde(rename = "ioTEdgeDeviceDetails")]
     pub io_t_edge_device_details: IoTDeviceInfo,
     #[doc = "Mount points of shares in role(s)."]
-    #[serde(rename = "shareMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_mappings: Vec<MountPointMap>,
     #[doc = "IoT edge agent details is optional, this will be used for download system Agent module while bootstrapping IoT Role if specified."]
     #[serde(rename = "ioTEdgeAgentInfo", default, skip_serializing_if = "Option::is_none")]
@@ -2715,7 +2780,12 @@ pub mod job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobErrorDetails {
     #[doc = "The error details."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<JobErrorItem>,
     #[doc = "The code intended for programmatic access."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2733,7 +2803,11 @@ impl JobErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobErrorItem {
     #[doc = "The recommended actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
     #[doc = "The code intended for programmatic access."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2908,7 +2982,11 @@ pub struct KubernetesClusterInfo {
     #[serde(rename = "etcdInfo", default, skip_serializing_if = "Option::is_none")]
     pub etcd_info: Option<EtcdInfo>,
     #[doc = "Kubernetes cluster nodes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<NodeInfo>,
     #[doc = "Kubernetes cluster version"]
     pub version: String,
@@ -3229,10 +3307,19 @@ impl KubernetesRoleResources {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KubernetesRoleStorage {
     #[doc = "Kubernetes storage class info."]
-    #[serde(rename = "storageClasses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageClasses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_classes: Vec<KubernetesRoleStorageClassInfo>,
     #[doc = "Mount points of shares in role(s)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<MountPointMap>,
 }
 impl KubernetesRoleStorage {
@@ -3437,10 +3524,20 @@ pub struct MetricCounter {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub instance: Option<String>,
     #[doc = "The dimension filter."]
-    #[serde(rename = "dimensionFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dimensionFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimension_filter: Vec<MetricDimension>,
     #[doc = "The additional dimensions to be added to metric."]
-    #[serde(rename = "additionalDimensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalDimensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_dimensions: Vec<MetricDimension>,
 }
 impl MetricCounter {
@@ -3516,7 +3613,11 @@ pub struct MetricSpecificationV1 {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<metric_specification_v1::AggregationType>,
     #[doc = "Metric dimensions, other than default dimension which is resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimensionV1>,
     #[doc = "Set true to fill the gaps with zero."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -3528,10 +3629,20 @@ pub struct MetricSpecificationV1 {
     #[serde(rename = "resourceIdDimensionNameOverride", default, skip_serializing_if = "Option::is_none")]
     pub resource_id_dimension_name_override: Option<String>,
     #[doc = "Support granularity of metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Support metric aggregation type."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
 }
 impl MetricSpecificationV1 {
@@ -3695,7 +3806,11 @@ impl MonitoringMetricConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoringMetricConfigurationList {
     #[doc = "The list of metric configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoringMetricConfiguration>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3890,7 +4005,12 @@ pub struct NetworkAdapter {
     #[serde(rename = "ipv6LinkLocalAddress", default, skip_serializing_if = "Option::is_none")]
     pub ipv6_link_local_address: Option<String>,
     #[doc = "The list of DNS Servers of the device."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl NetworkAdapter {
@@ -4089,7 +4209,12 @@ impl NetworkSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkSettingsProperties {
     #[doc = "The network adapter list on the device."]
-    #[serde(rename = "networkAdapters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAdapters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_adapters: Vec<NetworkAdapter>,
 }
 impl NetworkSettingsProperties {
@@ -4121,7 +4246,12 @@ pub struct NodeInfo {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<node_info::Type>,
     #[doc = "IP Configuration of the Kubernetes node."]
-    #[serde(rename = "ipConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configuration: Vec<KubernetesIpConfiguration>,
 }
 impl NodeInfo {
@@ -4175,7 +4305,11 @@ pub mod node_info {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeList {
     #[doc = "The list of Nodes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Node>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4363,7 +4497,11 @@ impl Order {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrderList {
     #[doc = "The list of orders."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Order>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4393,16 +4531,31 @@ pub struct OrderProperties {
     #[serde(rename = "currentStatus", default, skip_serializing_if = "Option::is_none")]
     pub current_status: Option<OrderStatus>,
     #[doc = "List of status changes in the order."]
-    #[serde(rename = "orderHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orderHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub order_history: Vec<OrderStatus>,
     #[doc = "Serial number of the device."]
     #[serde(rename = "serialNumber", default, skip_serializing_if = "Option::is_none")]
     pub serial_number: Option<String>,
     #[doc = "Tracking information for the package delivered to the customer whether it has an original or a replacement device."]
-    #[serde(rename = "deliveryTrackingInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryTrackingInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_tracking_info: Vec<TrackingInfo>,
     #[doc = "Tracking information for the package returned from the customer whether it has an original or a replacement device."]
-    #[serde(rename = "returnTrackingInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "returnTrackingInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub return_tracking_info: Vec<TrackingInfo>,
     #[doc = "ShipmentType of the order"]
     #[serde(rename = "shipmentType", default, skip_serializing_if = "Option::is_none")]
@@ -4840,7 +4993,11 @@ pub struct ResourceTypeSku {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "The skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skus: Vec<SkuInformation>,
 }
 impl ResourceTypeSku {
@@ -4925,7 +5082,11 @@ pub mod role {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleList {
     #[doc = "The Value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Role>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5001,7 +5162,12 @@ impl SecuritySettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specification as defined by shoebox."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecificationV1>,
 }
 impl ServiceSpecification {
@@ -5090,7 +5256,11 @@ pub mod share_access_right {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ShareList {
     #[doc = "The list of shares."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Share>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5126,16 +5296,31 @@ pub struct ShareProperties {
     #[serde(rename = "accessProtocol")]
     pub access_protocol: share_properties::AccessProtocol,
     #[doc = "Mapping of users and corresponding access rights on the share (required for SMB protocol)."]
-    #[serde(rename = "userAccessRights", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccessRights",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_access_rights: Vec<UserAccessRight>,
     #[doc = "List of IP addresses and corresponding access rights on the share(required for NFS protocol)."]
-    #[serde(rename = "clientAccessRights", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientAccessRights",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_access_rights: Vec<ClientAccessRight>,
     #[doc = "Fields for tracking refresh job on the share or container."]
     #[serde(rename = "refreshDetails", default, skip_serializing_if = "Option::is_none")]
     pub refresh_details: Option<RefreshDetails>,
     #[doc = "Share mount point to the role."]
-    #[serde(rename = "shareMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_mappings: Vec<MountPointMap>,
     #[doc = "Data policy of the share."]
     #[serde(rename = "dataPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -5517,19 +5702,42 @@ pub struct SkuInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub family: Option<String>,
     #[doc = "The pricing info of the Sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "The locations where Sku is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The locations where Sku is available with zones and sites info"]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfo>,
     #[doc = "The required quotaIds for the sku to be available."]
-    #[serde(rename = "requiredQuotaIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredQuotaIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_quota_ids: Vec<String>,
     #[doc = "The required features for the sku to be available."]
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
 }
 impl SkuInformation {
@@ -5541,7 +5749,11 @@ impl SkuInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuInformationList {
     #[doc = "List of ResourceTypeSku objects"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceTypeSku>,
     #[doc = "Links to the next set of results"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5559,10 +5771,18 @@ pub struct SkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "The zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The sites."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<String>,
 }
 impl SkuLocationInfo {
@@ -5614,7 +5834,11 @@ impl StorageAccountCredential {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountCredentialList {
     #[doc = "The value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccountCredential>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5757,7 +5981,11 @@ pub mod storage_account_credential_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountList {
     #[doc = "The list of storageAccounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccount>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5902,7 +6130,12 @@ pub struct SubscriptionProperties {
     pub quota_id: Option<String>,
     #[serde(rename = "serializedDetails", default, skip_serializing_if = "Option::is_none")]
     pub serialized_details: Option<String>,
-    #[serde(rename = "registeredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "registeredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub registered_features: Vec<SubscriptionRegisteredFeatures>,
 }
 impl SubscriptionProperties {
@@ -6131,7 +6364,11 @@ pub mod trigger {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TriggerList {
     #[doc = "The list of triggers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Trigger>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6308,7 +6545,12 @@ pub struct UpdateSummaryProperties {
     )]
     pub in_progress_install_job_started_date_time: Option<time::OffsetDateTime>,
     #[doc = "The list of updates available for install."]
-    #[serde(rename = "updateTitles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "updateTitles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub update_titles: Vec<String>,
     #[doc = "The total size of updates available for download in bytes."]
     #[serde(rename = "totalUpdateSizeInBytes", default, skip_serializing_if = "Option::is_none")]
@@ -6567,7 +6809,11 @@ pub mod user_access_right {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserList {
     #[doc = "The list of users."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<User>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6591,7 +6837,12 @@ pub struct UserProperties {
     #[serde(rename = "encryptedPassword", default, skip_serializing_if = "Option::is_none")]
     pub encrypted_password: Option<AsymmetricEncryptedSecret>,
     #[doc = "List of shares that the user has rights on. This field should not be specified during user creation."]
-    #[serde(rename = "shareAccessRights", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareAccessRights",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_access_rights: Vec<ShareAccessRight>,
     #[doc = "Type of the user."]
     #[serde(rename = "userType")]
diff --git a/services/mgmt/databoxedge/src/package_2021_02_01/models.rs b/services/mgmt/databoxedge/src/package_2021_02_01/models.rs
index 8089d71b23..4069437a84 100644
--- a/services/mgmt/databoxedge/src/package_2021_02_01/models.rs
+++ b/services/mgmt/databoxedge/src/package_2021_02_01/models.rs
@@ -85,7 +85,11 @@ pub mod addon {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AddonList {
     #[doc = "The Value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Addon>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -178,7 +182,11 @@ impl AlertErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertList {
     #[doc = "The value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -650,7 +658,11 @@ impl BandwidthScheduleProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BandwidthSchedulesList {
     #[doc = "The list of bandwidth schedules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BandwidthSchedule>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -879,7 +891,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -975,7 +991,11 @@ impl Container {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerList {
     #[doc = "The list of containers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Container>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1390,7 +1410,11 @@ pub mod data_box_edge_device_extended_info_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataBoxEdgeDeviceList {
     #[doc = "The list of Data Box Edge/Gateway devices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataBoxEdgeDevice>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1468,7 +1492,12 @@ pub struct DataBoxEdgeDeviceProperties {
     #[serde(rename = "deviceHcsVersion", default, skip_serializing_if = "Option::is_none")]
     pub device_hcs_version: Option<String>,
     #[doc = "Type of compute roles configured."]
-    #[serde(rename = "configuredRoleTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configuredRoleTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configured_role_types: Vec<String>,
     #[doc = "The number of nodes in the cluster."]
     #[serde(rename = "nodeCount", default, skip_serializing_if = "Option::is_none")]
@@ -1624,16 +1653,34 @@ pub struct DataBoxEdgeSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub family: Option<String>,
     #[doc = "Availability of the Sku for the region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The API versions in which Sku is available."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Availability of the Sku for the location/zone/site."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfo>,
     #[doc = "The pricing info of the Sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "Sku can be signed up by customer or not."]
     #[serde(rename = "signupOption", default, skip_serializing_if = "Option::is_none")]
@@ -1645,10 +1692,19 @@ pub struct DataBoxEdgeSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub availability: Option<data_box_edge_sku::Availability>,
     #[doc = "List of Shipment Types supported by this SKU"]
-    #[serde(rename = "shipmentTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shipmentTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shipment_types: Vec<String>,
     #[doc = "The capability info of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl DataBoxEdgeSku {
@@ -1914,7 +1970,11 @@ pub mod data_box_edge_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataBoxEdgeSkuList {
     #[doc = "List of ResourceType Sku"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataBoxEdgeSku>,
     #[doc = "Links to the next set of results"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2027,7 +2087,12 @@ impl DiagnosticRemoteSupportSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticRemoteSupportSettingsProperties {
     #[doc = "Remote support settings list according to the RemoteApplicationType"]
-    #[serde(rename = "remoteSupportSettingsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "remoteSupportSettingsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub remote_support_settings_list: Vec<RemoteSupportSettings>,
 }
 impl DiagnosticRemoteSupportSettingsProperties {
@@ -2532,7 +2597,12 @@ pub struct IoTRoleProperties {
     #[serde(rename = "ioTEdgeDeviceDetails")]
     pub io_t_edge_device_details: IoTDeviceInfo,
     #[doc = "Mount points of shares in role(s)."]
-    #[serde(rename = "shareMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_mappings: Vec<MountPointMap>,
     #[doc = "IoT edge agent details is optional, this will be used for download system Agent module while bootstrapping IoT Role if specified."]
     #[serde(rename = "ioTEdgeAgentInfo", default, skip_serializing_if = "Option::is_none")]
@@ -2807,7 +2877,12 @@ pub mod job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobErrorDetails {
     #[doc = "The error details."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<JobErrorItem>,
     #[doc = "The code intended for programmatic access."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2825,7 +2900,11 @@ impl JobErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobErrorItem {
     #[doc = "The recommended actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
     #[doc = "The code intended for programmatic access."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3000,7 +3079,11 @@ pub struct KubernetesClusterInfo {
     #[serde(rename = "etcdInfo", default, skip_serializing_if = "Option::is_none")]
     pub etcd_info: Option<EtcdInfo>,
     #[doc = "Kubernetes cluster nodes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<NodeInfo>,
     #[doc = "Kubernetes cluster version"]
     pub version: String,
@@ -3321,10 +3404,19 @@ impl KubernetesRoleResources {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KubernetesRoleStorage {
     #[doc = "Kubernetes storage class info."]
-    #[serde(rename = "storageClasses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageClasses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_classes: Vec<KubernetesRoleStorageClassInfo>,
     #[doc = "Mount points of shares in role(s)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<MountPointMap>,
 }
 impl KubernetesRoleStorage {
@@ -3537,10 +3629,20 @@ pub struct MetricCounter {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub instance: Option<String>,
     #[doc = "The dimension filter."]
-    #[serde(rename = "dimensionFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dimensionFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimension_filter: Vec<MetricDimension>,
     #[doc = "The additional dimensions to be added to metric."]
-    #[serde(rename = "additionalDimensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalDimensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_dimensions: Vec<MetricDimension>,
 }
 impl MetricCounter {
@@ -3616,7 +3718,11 @@ pub struct MetricSpecificationV1 {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<metric_specification_v1::AggregationType>,
     #[doc = "Metric dimensions, other than default dimension which is resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimensionV1>,
     #[doc = "Set true to fill the gaps with zero."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -3628,10 +3734,20 @@ pub struct MetricSpecificationV1 {
     #[serde(rename = "resourceIdDimensionNameOverride", default, skip_serializing_if = "Option::is_none")]
     pub resource_id_dimension_name_override: Option<String>,
     #[doc = "Support granularity of metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Support metric aggregation type."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
 }
 impl MetricSpecificationV1 {
@@ -3799,7 +3915,11 @@ impl MonitoringMetricConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoringMetricConfigurationList {
     #[doc = "The list of metric configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoringMetricConfiguration>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3994,7 +4114,12 @@ pub struct NetworkAdapter {
     #[serde(rename = "ipv6LinkLocalAddress", default, skip_serializing_if = "Option::is_none")]
     pub ipv6_link_local_address: Option<String>,
     #[doc = "The list of DNS Servers of the device."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl NetworkAdapter {
@@ -4196,7 +4321,12 @@ impl NetworkSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkSettingsProperties {
     #[doc = "The network adapter list on the device."]
-    #[serde(rename = "networkAdapters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAdapters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_adapters: Vec<NetworkAdapter>,
 }
 impl NetworkSettingsProperties {
@@ -4228,7 +4358,12 @@ pub struct NodeInfo {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<node_info::Type>,
     #[doc = "IP Configuration of the Kubernetes node."]
-    #[serde(rename = "ipConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configuration: Vec<KubernetesIpConfiguration>,
 }
 impl NodeInfo {
@@ -4282,7 +4417,11 @@ pub mod node_info {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeList {
     #[doc = "The list of Nodes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Node>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4473,7 +4612,11 @@ impl Order {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrderList {
     #[doc = "The list of orders."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Order>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4503,16 +4646,31 @@ pub struct OrderProperties {
     #[serde(rename = "currentStatus", default, skip_serializing_if = "Option::is_none")]
     pub current_status: Option<OrderStatus>,
     #[doc = "List of status changes in the order."]
-    #[serde(rename = "orderHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orderHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub order_history: Vec<OrderStatus>,
     #[doc = "Serial number of the device."]
     #[serde(rename = "serialNumber", default, skip_serializing_if = "Option::is_none")]
     pub serial_number: Option<String>,
     #[doc = "Tracking information for the package delivered to the customer whether it has an original or a replacement device."]
-    #[serde(rename = "deliveryTrackingInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryTrackingInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_tracking_info: Vec<TrackingInfo>,
     #[doc = "Tracking information for the package returned from the customer whether it has an original or a replacement device."]
-    #[serde(rename = "returnTrackingInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "returnTrackingInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub return_tracking_info: Vec<TrackingInfo>,
     #[doc = "ShipmentType of the order"]
     #[serde(rename = "shipmentType", default, skip_serializing_if = "Option::is_none")]
@@ -5107,7 +5265,11 @@ pub struct ResourceTypeSku {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "The skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skus: Vec<SkuInformation>,
 }
 impl ResourceTypeSku {
@@ -5192,7 +5354,11 @@ pub mod role {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleList {
     #[doc = "The Value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Role>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5268,7 +5434,12 @@ impl SecuritySettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specification as defined by shoebox."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecificationV1>,
 }
 impl ServiceSpecification {
@@ -5357,7 +5528,11 @@ pub mod share_access_right {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ShareList {
     #[doc = "The list of shares."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Share>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5393,16 +5568,31 @@ pub struct ShareProperties {
     #[serde(rename = "accessProtocol")]
     pub access_protocol: share_properties::AccessProtocol,
     #[doc = "Mapping of users and corresponding access rights on the share (required for SMB protocol)."]
-    #[serde(rename = "userAccessRights", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccessRights",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_access_rights: Vec<UserAccessRight>,
     #[doc = "List of IP addresses and corresponding access rights on the share(required for NFS protocol)."]
-    #[serde(rename = "clientAccessRights", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientAccessRights",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_access_rights: Vec<ClientAccessRight>,
     #[doc = "Fields for tracking refresh job on the share or container."]
     #[serde(rename = "refreshDetails", default, skip_serializing_if = "Option::is_none")]
     pub refresh_details: Option<RefreshDetails>,
     #[doc = "Share mount point to the role."]
-    #[serde(rename = "shareMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_mappings: Vec<MountPointMap>,
     #[doc = "Data policy of the share."]
     #[serde(rename = "dataPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -5795,19 +5985,42 @@ pub struct SkuInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub family: Option<String>,
     #[doc = "The pricing info of the Sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "The locations where Sku is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The locations where Sku is available with zones and sites info"]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfo>,
     #[doc = "The required quotaIds for the sku to be available."]
-    #[serde(rename = "requiredQuotaIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredQuotaIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_quota_ids: Vec<String>,
     #[doc = "The required features for the sku to be available."]
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
 }
 impl SkuInformation {
@@ -5819,7 +6032,11 @@ impl SkuInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuInformationList {
     #[doc = "List of ResourceTypeSku objects"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceTypeSku>,
     #[doc = "Links to the next set of results"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5837,10 +6054,18 @@ pub struct SkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "The zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The sites."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<String>,
 }
 impl SkuLocationInfo {
@@ -5892,7 +6117,11 @@ impl StorageAccountCredential {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountCredentialList {
     #[doc = "The value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccountCredential>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6035,7 +6264,11 @@ pub mod storage_account_credential_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountList {
     #[doc = "The list of storageAccounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccount>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6180,7 +6413,12 @@ pub struct SubscriptionProperties {
     pub quota_id: Option<String>,
     #[serde(rename = "serializedDetails", default, skip_serializing_if = "Option::is_none")]
     pub serialized_details: Option<String>,
-    #[serde(rename = "registeredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "registeredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub registered_features: Vec<SubscriptionRegisteredFeatures>,
 }
 impl SubscriptionProperties {
@@ -6427,7 +6665,11 @@ pub mod trigger {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TriggerList {
     #[doc = "The list of triggers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Trigger>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6840,10 +7082,19 @@ pub struct UpdateSummaryProperties {
     )]
     pub in_progress_install_job_started_date_time: Option<time::OffsetDateTime>,
     #[doc = "The list of updates available for install."]
-    #[serde(rename = "updateTitles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "updateTitles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub update_titles: Vec<String>,
     #[doc = "The list of updates available for install."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub updates: Vec<UpdateDetails>,
     #[doc = "The total size of updates available for download in bytes."]
     #[serde(rename = "totalUpdateSizeInBytes", default, skip_serializing_if = "Option::is_none")]
@@ -7199,7 +7450,11 @@ pub mod user_access_right {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserList {
     #[doc = "The list of users."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<User>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7223,7 +7478,12 @@ pub struct UserProperties {
     #[serde(rename = "encryptedPassword", default, skip_serializing_if = "Option::is_none")]
     pub encrypted_password: Option<AsymmetricEncryptedSecret>,
     #[doc = "List of shares that the user has rights on. This field should not be specified during user creation."]
-    #[serde(rename = "shareAccessRights", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareAccessRights",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_access_rights: Vec<ShareAccessRight>,
     #[doc = "Type of the user."]
     #[serde(rename = "userType")]
diff --git a/services/mgmt/databoxedge/src/package_2021_02_01_preview/models.rs b/services/mgmt/databoxedge/src/package_2021_02_01_preview/models.rs
index 31bfa8cef5..18e9c84e55 100644
--- a/services/mgmt/databoxedge/src/package_2021_02_01_preview/models.rs
+++ b/services/mgmt/databoxedge/src/package_2021_02_01_preview/models.rs
@@ -85,7 +85,11 @@ pub mod addon {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AddonList {
     #[doc = "The Value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Addon>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -178,7 +182,11 @@ impl AlertErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertList {
     #[doc = "The value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -650,7 +658,11 @@ impl BandwidthScheduleProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BandwidthSchedulesList {
     #[doc = "The list of bandwidth schedules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BandwidthSchedule>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -879,7 +891,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -975,7 +991,11 @@ impl Container {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerList {
     #[doc = "The list of containers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Container>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1390,7 +1410,11 @@ pub mod data_box_edge_device_extended_info_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataBoxEdgeDeviceList {
     #[doc = "The list of Data Box Edge/Gateway devices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataBoxEdgeDevice>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1465,7 +1489,12 @@ pub struct DataBoxEdgeDeviceProperties {
     #[serde(rename = "deviceHcsVersion", default, skip_serializing_if = "Option::is_none")]
     pub device_hcs_version: Option<String>,
     #[doc = "Type of compute roles configured."]
-    #[serde(rename = "configuredRoleTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configuredRoleTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configured_role_types: Vec<String>,
     #[doc = "The number of nodes in the cluster."]
     #[serde(rename = "nodeCount", default, skip_serializing_if = "Option::is_none")]
@@ -1618,16 +1647,34 @@ pub struct DataBoxEdgeSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub family: Option<String>,
     #[doc = "Availability of the Sku for the region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The API versions in which Sku is available."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Availability of the Sku for the location/zone/site."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfo>,
     #[doc = "The pricing info of the Sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "Sku can be signed up by customer or not."]
     #[serde(rename = "signupOption", default, skip_serializing_if = "Option::is_none")]
@@ -1639,10 +1686,19 @@ pub struct DataBoxEdgeSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub availability: Option<data_box_edge_sku::Availability>,
     #[doc = "List of Shipment Types supported by this SKU"]
-    #[serde(rename = "shipmentTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shipmentTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shipment_types: Vec<String>,
     #[doc = "The capability info of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl DataBoxEdgeSku {
@@ -1908,7 +1964,11 @@ pub mod data_box_edge_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataBoxEdgeSkuList {
     #[doc = "List of ResourceType Sku"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataBoxEdgeSku>,
     #[doc = "Links to the next set of results"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2422,7 +2482,12 @@ pub struct IoTRoleProperties {
     #[serde(rename = "ioTEdgeDeviceDetails")]
     pub io_t_edge_device_details: IoTDeviceInfo,
     #[doc = "Mount points of shares in role(s)."]
-    #[serde(rename = "shareMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_mappings: Vec<MountPointMap>,
     #[doc = "IoT edge agent details is optional, this will be used for download system Agent module while bootstrapping IoT Role if specified."]
     #[serde(rename = "ioTEdgeAgentInfo", default, skip_serializing_if = "Option::is_none")]
@@ -2697,7 +2762,12 @@ pub mod job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobErrorDetails {
     #[doc = "The error details."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<JobErrorItem>,
     #[doc = "The code intended for programmatic access."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2715,7 +2785,11 @@ impl JobErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobErrorItem {
     #[doc = "The recommended actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
     #[doc = "The code intended for programmatic access."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2890,7 +2964,11 @@ pub struct KubernetesClusterInfo {
     #[serde(rename = "etcdInfo", default, skip_serializing_if = "Option::is_none")]
     pub etcd_info: Option<EtcdInfo>,
     #[doc = "Kubernetes cluster nodes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<NodeInfo>,
     #[doc = "Kubernetes cluster version"]
     pub version: String,
@@ -3211,10 +3289,19 @@ impl KubernetesRoleResources {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KubernetesRoleStorage {
     #[doc = "Kubernetes storage class info."]
-    #[serde(rename = "storageClasses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageClasses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_classes: Vec<KubernetesRoleStorageClassInfo>,
     #[doc = "Mount points of shares in role(s)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<MountPointMap>,
 }
 impl KubernetesRoleStorage {
@@ -3427,10 +3514,20 @@ pub struct MetricCounter {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub instance: Option<String>,
     #[doc = "The dimension filter."]
-    #[serde(rename = "dimensionFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dimensionFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimension_filter: Vec<MetricDimension>,
     #[doc = "The additional dimensions to be added to metric."]
-    #[serde(rename = "additionalDimensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalDimensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_dimensions: Vec<MetricDimension>,
 }
 impl MetricCounter {
@@ -3506,7 +3603,11 @@ pub struct MetricSpecificationV1 {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<metric_specification_v1::AggregationType>,
     #[doc = "Metric dimensions, other than default dimension which is resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimensionV1>,
     #[doc = "Set true to fill the gaps with zero."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -3518,10 +3619,20 @@ pub struct MetricSpecificationV1 {
     #[serde(rename = "resourceIdDimensionNameOverride", default, skip_serializing_if = "Option::is_none")]
     pub resource_id_dimension_name_override: Option<String>,
     #[doc = "Support granularity of metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Support metric aggregation type."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
 }
 impl MetricSpecificationV1 {
@@ -3689,7 +3800,11 @@ impl MonitoringMetricConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoringMetricConfigurationList {
     #[doc = "The list of metric configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoringMetricConfiguration>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3884,7 +3999,12 @@ pub struct NetworkAdapter {
     #[serde(rename = "ipv6LinkLocalAddress", default, skip_serializing_if = "Option::is_none")]
     pub ipv6_link_local_address: Option<String>,
     #[doc = "The list of DNS Servers of the device."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl NetworkAdapter {
@@ -4086,7 +4206,12 @@ impl NetworkSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkSettingsProperties {
     #[doc = "The network adapter list on the device."]
-    #[serde(rename = "networkAdapters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAdapters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_adapters: Vec<NetworkAdapter>,
 }
 impl NetworkSettingsProperties {
@@ -4118,7 +4243,12 @@ pub struct NodeInfo {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<node_info::Type>,
     #[doc = "IP Configuration of the Kubernetes node."]
-    #[serde(rename = "ipConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configuration: Vec<KubernetesIpConfiguration>,
 }
 impl NodeInfo {
@@ -4172,7 +4302,11 @@ pub mod node_info {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeList {
     #[doc = "The list of Nodes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Node>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4363,7 +4497,11 @@ impl Order {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrderList {
     #[doc = "The list of orders."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Order>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4393,16 +4531,31 @@ pub struct OrderProperties {
     #[serde(rename = "currentStatus", default, skip_serializing_if = "Option::is_none")]
     pub current_status: Option<OrderStatus>,
     #[doc = "List of status changes in the order."]
-    #[serde(rename = "orderHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orderHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub order_history: Vec<OrderStatus>,
     #[doc = "Serial number of the device."]
     #[serde(rename = "serialNumber", default, skip_serializing_if = "Option::is_none")]
     pub serial_number: Option<String>,
     #[doc = "Tracking information for the package delivered to the customer whether it has an original or a replacement device."]
-    #[serde(rename = "deliveryTrackingInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryTrackingInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_tracking_info: Vec<TrackingInfo>,
     #[doc = "Tracking information for the package returned from the customer whether it has an original or a replacement device."]
-    #[serde(rename = "returnTrackingInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "returnTrackingInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub return_tracking_info: Vec<TrackingInfo>,
     #[doc = "ShipmentType of the order"]
     #[serde(rename = "shipmentType", default, skip_serializing_if = "Option::is_none")]
@@ -4840,7 +4993,11 @@ pub struct ResourceTypeSku {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "The skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skus: Vec<SkuInformation>,
 }
 impl ResourceTypeSku {
@@ -4925,7 +5082,11 @@ pub mod role {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleList {
     #[doc = "The Value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Role>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5001,7 +5162,12 @@ impl SecuritySettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specification as defined by shoebox."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecificationV1>,
 }
 impl ServiceSpecification {
@@ -5090,7 +5256,11 @@ pub mod share_access_right {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ShareList {
     #[doc = "The list of shares."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Share>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5126,16 +5296,31 @@ pub struct ShareProperties {
     #[serde(rename = "accessProtocol")]
     pub access_protocol: share_properties::AccessProtocol,
     #[doc = "Mapping of users and corresponding access rights on the share (required for SMB protocol)."]
-    #[serde(rename = "userAccessRights", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccessRights",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_access_rights: Vec<UserAccessRight>,
     #[doc = "List of IP addresses and corresponding access rights on the share(required for NFS protocol)."]
-    #[serde(rename = "clientAccessRights", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientAccessRights",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_access_rights: Vec<ClientAccessRight>,
     #[doc = "Fields for tracking refresh job on the share or container."]
     #[serde(rename = "refreshDetails", default, skip_serializing_if = "Option::is_none")]
     pub refresh_details: Option<RefreshDetails>,
     #[doc = "Share mount point to the role."]
-    #[serde(rename = "shareMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_mappings: Vec<MountPointMap>,
     #[doc = "Data policy of the share."]
     #[serde(rename = "dataPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -5528,19 +5713,42 @@ pub struct SkuInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub family: Option<String>,
     #[doc = "The pricing info of the Sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "The locations where Sku is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The locations where Sku is available with zones and sites info"]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfo>,
     #[doc = "The required quotaIds for the sku to be available."]
-    #[serde(rename = "requiredQuotaIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredQuotaIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_quota_ids: Vec<String>,
     #[doc = "The required features for the sku to be available."]
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
 }
 impl SkuInformation {
@@ -5552,7 +5760,11 @@ impl SkuInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuInformationList {
     #[doc = "List of ResourceTypeSku objects"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceTypeSku>,
     #[doc = "Links to the next set of results"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5570,10 +5782,18 @@ pub struct SkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "The zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The sites."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<String>,
 }
 impl SkuLocationInfo {
@@ -5625,7 +5845,11 @@ impl StorageAccountCredential {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountCredentialList {
     #[doc = "The value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccountCredential>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5768,7 +5992,11 @@ pub mod storage_account_credential_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountList {
     #[doc = "The list of storageAccounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccount>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5913,7 +6141,12 @@ pub struct SubscriptionProperties {
     pub quota_id: Option<String>,
     #[serde(rename = "serializedDetails", default, skip_serializing_if = "Option::is_none")]
     pub serialized_details: Option<String>,
-    #[serde(rename = "registeredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "registeredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub registered_features: Vec<SubscriptionRegisteredFeatures>,
 }
 impl SubscriptionProperties {
@@ -6142,7 +6375,11 @@ pub mod trigger {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TriggerList {
     #[doc = "The list of triggers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Trigger>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6488,10 +6725,19 @@ pub struct UpdateSummaryProperties {
     )]
     pub in_progress_install_job_started_date_time: Option<time::OffsetDateTime>,
     #[doc = "The list of updates available for install."]
-    #[serde(rename = "updateTitles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "updateTitles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub update_titles: Vec<String>,
     #[doc = "The list of updates available for install."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub updates: Vec<UpdateDetails>,
     #[doc = "The total size of updates available for download in bytes."]
     #[serde(rename = "totalUpdateSizeInBytes", default, skip_serializing_if = "Option::is_none")]
@@ -6847,7 +7093,11 @@ pub mod user_access_right {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserList {
     #[doc = "The list of users."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<User>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6871,7 +7121,12 @@ pub struct UserProperties {
     #[serde(rename = "encryptedPassword", default, skip_serializing_if = "Option::is_none")]
     pub encrypted_password: Option<AsymmetricEncryptedSecret>,
     #[doc = "List of shares that the user has rights on. This field should not be specified during user creation."]
-    #[serde(rename = "shareAccessRights", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareAccessRights",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_access_rights: Vec<ShareAccessRight>,
     #[doc = "Type of the user."]
     #[serde(rename = "userType", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/databoxedge/src/package_2021_06_01/models.rs b/services/mgmt/databoxedge/src/package_2021_06_01/models.rs
index db21213e29..22a51656a8 100644
--- a/services/mgmt/databoxedge/src/package_2021_06_01/models.rs
+++ b/services/mgmt/databoxedge/src/package_2021_06_01/models.rs
@@ -85,7 +85,11 @@ pub mod addon {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AddonList {
     #[doc = "The Value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Addon>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -178,7 +182,11 @@ impl AlertErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertList {
     #[doc = "The value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -650,7 +658,11 @@ impl BandwidthScheduleProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BandwidthSchedulesList {
     #[doc = "The list of bandwidth schedules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BandwidthSchedule>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -879,7 +891,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -975,7 +991,11 @@ impl Container {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerList {
     #[doc = "The list of containers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Container>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1447,7 +1467,11 @@ pub mod data_box_edge_device_extended_info_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataBoxEdgeDeviceList {
     #[doc = "The list of Data Box Edge/Gateway devices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataBoxEdgeDevice>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1525,7 +1549,12 @@ pub struct DataBoxEdgeDeviceProperties {
     #[serde(rename = "deviceHcsVersion", default, skip_serializing_if = "Option::is_none")]
     pub device_hcs_version: Option<String>,
     #[doc = "Type of compute roles configured."]
-    #[serde(rename = "configuredRoleTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configuredRoleTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configured_role_types: Vec<String>,
     #[doc = "The number of nodes in the cluster."]
     #[serde(rename = "nodeCount", default, skip_serializing_if = "Option::is_none")]
@@ -1681,16 +1710,34 @@ pub struct DataBoxEdgeSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub family: Option<String>,
     #[doc = "Availability of the Sku for the region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The API versions in which Sku is available."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Availability of the Sku for the location/zone/site."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfo>,
     #[doc = "The pricing info of the Sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "Sku can be signed up by customer or not."]
     #[serde(rename = "signupOption", default, skip_serializing_if = "Option::is_none")]
@@ -1702,10 +1749,19 @@ pub struct DataBoxEdgeSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub availability: Option<data_box_edge_sku::Availability>,
     #[doc = "List of Shipment Types supported by this SKU"]
-    #[serde(rename = "shipmentTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shipmentTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shipment_types: Vec<String>,
     #[doc = "The capability info of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl DataBoxEdgeSku {
@@ -1971,7 +2027,11 @@ pub mod data_box_edge_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataBoxEdgeSkuList {
     #[doc = "List of ResourceType Sku"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataBoxEdgeSku>,
     #[doc = "Links to the next set of results"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2084,7 +2144,12 @@ impl DiagnosticRemoteSupportSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticRemoteSupportSettingsProperties {
     #[doc = "Remote support settings list according to the RemoteApplicationType"]
-    #[serde(rename = "remoteSupportSettingsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "remoteSupportSettingsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub remote_support_settings_list: Vec<RemoteSupportSettings>,
 }
 impl DiagnosticRemoteSupportSettingsProperties {
@@ -2589,7 +2654,12 @@ pub struct IoTRoleProperties {
     #[serde(rename = "ioTEdgeDeviceDetails")]
     pub io_t_edge_device_details: IoTDeviceInfo,
     #[doc = "Mount points of shares in role(s)."]
-    #[serde(rename = "shareMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_mappings: Vec<MountPointMap>,
     #[doc = "IoT edge agent details is optional, this will be used for download system Agent module while bootstrapping IoT Role if specified."]
     #[serde(rename = "ioTEdgeAgentInfo", default, skip_serializing_if = "Option::is_none")]
@@ -2864,7 +2934,12 @@ pub mod job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobErrorDetails {
     #[doc = "The error details."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<JobErrorItem>,
     #[doc = "The code intended for programmatic access."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2882,7 +2957,11 @@ impl JobErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobErrorItem {
     #[doc = "The recommended actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
     #[doc = "The code intended for programmatic access."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3057,7 +3136,11 @@ pub struct KubernetesClusterInfo {
     #[serde(rename = "etcdInfo", default, skip_serializing_if = "Option::is_none")]
     pub etcd_info: Option<EtcdInfo>,
     #[doc = "Kubernetes cluster nodes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<NodeInfo>,
     #[doc = "Kubernetes cluster version"]
     pub version: String,
@@ -3378,10 +3461,19 @@ impl KubernetesRoleResources {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KubernetesRoleStorage {
     #[doc = "Kubernetes storage class info."]
-    #[serde(rename = "storageClasses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageClasses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_classes: Vec<KubernetesRoleStorageClassInfo>,
     #[doc = "Mount points of shares in role(s)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<MountPointMap>,
 }
 impl KubernetesRoleStorage {
@@ -3594,10 +3686,20 @@ pub struct MetricCounter {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub instance: Option<String>,
     #[doc = "The dimension filter."]
-    #[serde(rename = "dimensionFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dimensionFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimension_filter: Vec<MetricDimension>,
     #[doc = "The additional dimensions to be added to metric."]
-    #[serde(rename = "additionalDimensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalDimensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_dimensions: Vec<MetricDimension>,
 }
 impl MetricCounter {
@@ -3673,7 +3775,11 @@ pub struct MetricSpecificationV1 {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<metric_specification_v1::AggregationType>,
     #[doc = "Metric dimensions, other than default dimension which is resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimensionV1>,
     #[doc = "Set true to fill the gaps with zero."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -3685,10 +3791,20 @@ pub struct MetricSpecificationV1 {
     #[serde(rename = "resourceIdDimensionNameOverride", default, skip_serializing_if = "Option::is_none")]
     pub resource_id_dimension_name_override: Option<String>,
     #[doc = "Support granularity of metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Support metric aggregation type."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
 }
 impl MetricSpecificationV1 {
@@ -3856,7 +3972,11 @@ impl MonitoringMetricConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoringMetricConfigurationList {
     #[doc = "The list of metric configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoringMetricConfiguration>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4051,7 +4171,12 @@ pub struct NetworkAdapter {
     #[serde(rename = "ipv6LinkLocalAddress", default, skip_serializing_if = "Option::is_none")]
     pub ipv6_link_local_address: Option<String>,
     #[doc = "The list of DNS Servers of the device."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl NetworkAdapter {
@@ -4253,7 +4378,12 @@ impl NetworkSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkSettingsProperties {
     #[doc = "The network adapter list on the device."]
-    #[serde(rename = "networkAdapters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAdapters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_adapters: Vec<NetworkAdapter>,
 }
 impl NetworkSettingsProperties {
@@ -4285,7 +4415,12 @@ pub struct NodeInfo {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<node_info::Type>,
     #[doc = "IP Configuration of the Kubernetes node."]
-    #[serde(rename = "ipConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configuration: Vec<KubernetesIpConfiguration>,
 }
 impl NodeInfo {
@@ -4339,7 +4474,11 @@ pub mod node_info {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeList {
     #[doc = "The list of Nodes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Node>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4530,7 +4669,11 @@ impl Order {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrderList {
     #[doc = "The list of orders."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Order>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4560,16 +4703,31 @@ pub struct OrderProperties {
     #[serde(rename = "currentStatus", default, skip_serializing_if = "Option::is_none")]
     pub current_status: Option<OrderStatus>,
     #[doc = "List of status changes in the order."]
-    #[serde(rename = "orderHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orderHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub order_history: Vec<OrderStatus>,
     #[doc = "Serial number of the device."]
     #[serde(rename = "serialNumber", default, skip_serializing_if = "Option::is_none")]
     pub serial_number: Option<String>,
     #[doc = "Tracking information for the package delivered to the customer whether it has an original or a replacement device."]
-    #[serde(rename = "deliveryTrackingInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryTrackingInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_tracking_info: Vec<TrackingInfo>,
     #[doc = "Tracking information for the package returned from the customer whether it has an original or a replacement device."]
-    #[serde(rename = "returnTrackingInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "returnTrackingInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub return_tracking_info: Vec<TrackingInfo>,
     #[doc = "ShipmentType of the order"]
     #[serde(rename = "shipmentType", default, skip_serializing_if = "Option::is_none")]
@@ -5164,7 +5322,11 @@ pub struct ResourceTypeSku {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "The skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skus: Vec<SkuInformation>,
 }
 impl ResourceTypeSku {
@@ -5249,7 +5411,11 @@ pub mod role {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleList {
     #[doc = "The Value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Role>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5325,7 +5491,12 @@ impl SecuritySettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specification as defined by shoebox."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecificationV1>,
 }
 impl ServiceSpecification {
@@ -5414,7 +5585,11 @@ pub mod share_access_right {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ShareList {
     #[doc = "The list of shares."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Share>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5450,16 +5625,31 @@ pub struct ShareProperties {
     #[serde(rename = "accessProtocol")]
     pub access_protocol: share_properties::AccessProtocol,
     #[doc = "Mapping of users and corresponding access rights on the share (required for SMB protocol)."]
-    #[serde(rename = "userAccessRights", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccessRights",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_access_rights: Vec<UserAccessRight>,
     #[doc = "List of IP addresses and corresponding access rights on the share(required for NFS protocol)."]
-    #[serde(rename = "clientAccessRights", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientAccessRights",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_access_rights: Vec<ClientAccessRight>,
     #[doc = "Fields for tracking refresh job on the share or container."]
     #[serde(rename = "refreshDetails", default, skip_serializing_if = "Option::is_none")]
     pub refresh_details: Option<RefreshDetails>,
     #[doc = "Share mount point to the role."]
-    #[serde(rename = "shareMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_mappings: Vec<MountPointMap>,
     #[doc = "Data policy of the share."]
     #[serde(rename = "dataPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -5852,19 +6042,42 @@ pub struct SkuInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub family: Option<String>,
     #[doc = "The pricing info of the Sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "The locations where Sku is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The locations where Sku is available with zones and sites info"]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfo>,
     #[doc = "The required quotaIds for the sku to be available."]
-    #[serde(rename = "requiredQuotaIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredQuotaIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_quota_ids: Vec<String>,
     #[doc = "The required features for the sku to be available."]
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
 }
 impl SkuInformation {
@@ -5876,7 +6089,11 @@ impl SkuInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuInformationList {
     #[doc = "List of ResourceTypeSku objects"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceTypeSku>,
     #[doc = "Links to the next set of results"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5894,10 +6111,18 @@ pub struct SkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "The zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The sites."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<String>,
 }
 impl SkuLocationInfo {
@@ -5949,7 +6174,11 @@ impl StorageAccountCredential {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountCredentialList {
     #[doc = "The value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccountCredential>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6092,7 +6321,11 @@ pub mod storage_account_credential_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountList {
     #[doc = "The list of storageAccounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccount>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6237,7 +6470,12 @@ pub struct SubscriptionProperties {
     pub quota_id: Option<String>,
     #[serde(rename = "serializedDetails", default, skip_serializing_if = "Option::is_none")]
     pub serialized_details: Option<String>,
-    #[serde(rename = "registeredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "registeredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub registered_features: Vec<SubscriptionRegisteredFeatures>,
 }
 impl SubscriptionProperties {
@@ -6484,7 +6722,11 @@ pub mod trigger {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TriggerList {
     #[doc = "The list of triggers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Trigger>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6897,10 +7139,19 @@ pub struct UpdateSummaryProperties {
     )]
     pub in_progress_install_job_started_date_time: Option<time::OffsetDateTime>,
     #[doc = "The list of updates available for install."]
-    #[serde(rename = "updateTitles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "updateTitles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub update_titles: Vec<String>,
     #[doc = "The list of updates available for install."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub updates: Vec<UpdateDetails>,
     #[doc = "The total size of updates available for download in bytes."]
     #[serde(rename = "totalUpdateSizeInBytes", default, skip_serializing_if = "Option::is_none")]
@@ -7256,7 +7507,11 @@ pub mod user_access_right {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserList {
     #[doc = "The list of users."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<User>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7280,7 +7535,12 @@ pub struct UserProperties {
     #[serde(rename = "encryptedPassword", default, skip_serializing_if = "Option::is_none")]
     pub encrypted_password: Option<AsymmetricEncryptedSecret>,
     #[doc = "List of shares that the user has rights on. This field should not be specified during user creation."]
-    #[serde(rename = "shareAccessRights", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareAccessRights",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_access_rights: Vec<ShareAccessRight>,
     #[doc = "Type of the user."]
     #[serde(rename = "userType")]
diff --git a/services/mgmt/databoxedge/src/package_2021_06_01_preview/models.rs b/services/mgmt/databoxedge/src/package_2021_06_01_preview/models.rs
index 1f13df8479..a3c6b1770f 100644
--- a/services/mgmt/databoxedge/src/package_2021_06_01_preview/models.rs
+++ b/services/mgmt/databoxedge/src/package_2021_06_01_preview/models.rs
@@ -85,7 +85,11 @@ pub mod addon {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AddonList {
     #[doc = "The Value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Addon>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -178,7 +182,11 @@ impl AlertErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertList {
     #[doc = "The value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -650,7 +658,11 @@ impl BandwidthScheduleProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BandwidthSchedulesList {
     #[doc = "The list of bandwidth schedules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BandwidthSchedule>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -879,7 +891,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -975,7 +991,11 @@ impl Container {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerList {
     #[doc = "The list of containers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Container>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1447,7 +1467,11 @@ pub mod data_box_edge_device_extended_info_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataBoxEdgeDeviceList {
     #[doc = "The list of Data Box Edge/Gateway devices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataBoxEdgeDevice>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1525,7 +1549,12 @@ pub struct DataBoxEdgeDeviceProperties {
     #[serde(rename = "deviceHcsVersion", default, skip_serializing_if = "Option::is_none")]
     pub device_hcs_version: Option<String>,
     #[doc = "Type of compute roles configured."]
-    #[serde(rename = "configuredRoleTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configuredRoleTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configured_role_types: Vec<String>,
     #[doc = "The number of nodes in the cluster."]
     #[serde(rename = "nodeCount", default, skip_serializing_if = "Option::is_none")]
@@ -1681,16 +1710,34 @@ pub struct DataBoxEdgeSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub family: Option<String>,
     #[doc = "Availability of the Sku for the region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The API versions in which Sku is available."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Availability of the Sku for the location/zone/site."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfo>,
     #[doc = "The pricing info of the Sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "Sku can be signed up by customer or not."]
     #[serde(rename = "signupOption", default, skip_serializing_if = "Option::is_none")]
@@ -1702,10 +1749,19 @@ pub struct DataBoxEdgeSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub availability: Option<data_box_edge_sku::Availability>,
     #[doc = "List of Shipment Types supported by this SKU"]
-    #[serde(rename = "shipmentTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shipmentTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shipment_types: Vec<String>,
     #[doc = "The capability info of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl DataBoxEdgeSku {
@@ -1971,7 +2027,11 @@ pub mod data_box_edge_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataBoxEdgeSkuList {
     #[doc = "List of ResourceType Sku"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataBoxEdgeSku>,
     #[doc = "Links to the next set of results"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2084,7 +2144,12 @@ impl DiagnosticRemoteSupportSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticRemoteSupportSettingsProperties {
     #[doc = "Remote support settings list according to the RemoteApplicationType"]
-    #[serde(rename = "remoteSupportSettingsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "remoteSupportSettingsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub remote_support_settings_list: Vec<RemoteSupportSettings>,
 }
 impl DiagnosticRemoteSupportSettingsProperties {
@@ -2589,7 +2654,12 @@ pub struct IoTRoleProperties {
     #[serde(rename = "ioTEdgeDeviceDetails")]
     pub io_t_edge_device_details: IoTDeviceInfo,
     #[doc = "Mount points of shares in role(s)."]
-    #[serde(rename = "shareMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_mappings: Vec<MountPointMap>,
     #[doc = "IoT edge agent details is optional, this will be used for download system Agent module while bootstrapping IoT Role if specified."]
     #[serde(rename = "ioTEdgeAgentInfo", default, skip_serializing_if = "Option::is_none")]
@@ -2864,7 +2934,12 @@ pub mod job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobErrorDetails {
     #[doc = "The error details."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<JobErrorItem>,
     #[doc = "The code intended for programmatic access."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2882,7 +2957,11 @@ impl JobErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobErrorItem {
     #[doc = "The recommended actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
     #[doc = "The code intended for programmatic access."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3057,7 +3136,11 @@ pub struct KubernetesClusterInfo {
     #[serde(rename = "etcdInfo", default, skip_serializing_if = "Option::is_none")]
     pub etcd_info: Option<EtcdInfo>,
     #[doc = "Kubernetes cluster nodes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<NodeInfo>,
     #[doc = "Kubernetes cluster version"]
     pub version: String,
@@ -3378,10 +3461,19 @@ impl KubernetesRoleResources {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KubernetesRoleStorage {
     #[doc = "Kubernetes storage class info."]
-    #[serde(rename = "storageClasses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageClasses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_classes: Vec<KubernetesRoleStorageClassInfo>,
     #[doc = "Mount points of shares in role(s)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<MountPointMap>,
 }
 impl KubernetesRoleStorage {
@@ -3594,10 +3686,20 @@ pub struct MetricCounter {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub instance: Option<String>,
     #[doc = "The dimension filter."]
-    #[serde(rename = "dimensionFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dimensionFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimension_filter: Vec<MetricDimension>,
     #[doc = "The additional dimensions to be added to metric."]
-    #[serde(rename = "additionalDimensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalDimensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_dimensions: Vec<MetricDimension>,
 }
 impl MetricCounter {
@@ -3673,7 +3775,11 @@ pub struct MetricSpecificationV1 {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<metric_specification_v1::AggregationType>,
     #[doc = "Metric dimensions, other than default dimension which is resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimensionV1>,
     #[doc = "Set true to fill the gaps with zero."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -3685,10 +3791,20 @@ pub struct MetricSpecificationV1 {
     #[serde(rename = "resourceIdDimensionNameOverride", default, skip_serializing_if = "Option::is_none")]
     pub resource_id_dimension_name_override: Option<String>,
     #[doc = "Support granularity of metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Support metric aggregation type."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
 }
 impl MetricSpecificationV1 {
@@ -3856,7 +3972,11 @@ impl MonitoringMetricConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoringMetricConfigurationList {
     #[doc = "The list of metric configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoringMetricConfiguration>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4051,7 +4171,12 @@ pub struct NetworkAdapter {
     #[serde(rename = "ipv6LinkLocalAddress", default, skip_serializing_if = "Option::is_none")]
     pub ipv6_link_local_address: Option<String>,
     #[doc = "The list of DNS Servers of the device."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl NetworkAdapter {
@@ -4253,7 +4378,12 @@ impl NetworkSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkSettingsProperties {
     #[doc = "The network adapter list on the device."]
-    #[serde(rename = "networkAdapters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAdapters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_adapters: Vec<NetworkAdapter>,
 }
 impl NetworkSettingsProperties {
@@ -4285,7 +4415,12 @@ pub struct NodeInfo {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<node_info::Type>,
     #[doc = "IP Configuration of the Kubernetes node."]
-    #[serde(rename = "ipConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configuration: Vec<KubernetesIpConfiguration>,
 }
 impl NodeInfo {
@@ -4339,7 +4474,11 @@ pub mod node_info {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeList {
     #[doc = "The list of Nodes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Node>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4533,7 +4672,11 @@ impl Order {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrderList {
     #[doc = "The list of orders."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Order>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4566,16 +4709,31 @@ pub struct OrderProperties {
     #[serde(rename = "currentStatus", default, skip_serializing_if = "Option::is_none")]
     pub current_status: Option<OrderStatus>,
     #[doc = "List of status changes in the order."]
-    #[serde(rename = "orderHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orderHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub order_history: Vec<OrderStatus>,
     #[doc = "Serial number of the device."]
     #[serde(rename = "serialNumber", default, skip_serializing_if = "Option::is_none")]
     pub serial_number: Option<String>,
     #[doc = "Tracking information for the package delivered to the customer whether it has an original or a replacement device."]
-    #[serde(rename = "deliveryTrackingInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryTrackingInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_tracking_info: Vec<TrackingInfo>,
     #[doc = "Tracking information for the package returned from the customer whether it has an original or a replacement device."]
-    #[serde(rename = "returnTrackingInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "returnTrackingInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub return_tracking_info: Vec<TrackingInfo>,
     #[doc = "ShipmentType of the order"]
     #[serde(rename = "shipmentType", default, skip_serializing_if = "Option::is_none")]
@@ -5161,7 +5319,11 @@ pub struct ResourceTypeSku {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "The skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skus: Vec<SkuInformation>,
 }
 impl ResourceTypeSku {
@@ -5246,7 +5408,11 @@ pub mod role {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleList {
     #[doc = "The Value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Role>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5322,7 +5488,12 @@ impl SecuritySettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specification as defined by shoebox."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecificationV1>,
 }
 impl ServiceSpecification {
@@ -5411,7 +5582,11 @@ pub mod share_access_right {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ShareList {
     #[doc = "The list of shares."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Share>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5447,16 +5622,31 @@ pub struct ShareProperties {
     #[serde(rename = "accessProtocol")]
     pub access_protocol: share_properties::AccessProtocol,
     #[doc = "Mapping of users and corresponding access rights on the share (required for SMB protocol)."]
-    #[serde(rename = "userAccessRights", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccessRights",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_access_rights: Vec<UserAccessRight>,
     #[doc = "List of IP addresses and corresponding access rights on the share(required for NFS protocol)."]
-    #[serde(rename = "clientAccessRights", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientAccessRights",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_access_rights: Vec<ClientAccessRight>,
     #[doc = "Fields for tracking refresh job on the share or container."]
     #[serde(rename = "refreshDetails", default, skip_serializing_if = "Option::is_none")]
     pub refresh_details: Option<RefreshDetails>,
     #[doc = "Share mount point to the role."]
-    #[serde(rename = "shareMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_mappings: Vec<MountPointMap>,
     #[doc = "Data policy of the share."]
     #[serde(rename = "dataPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -5849,19 +6039,42 @@ pub struct SkuInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub family: Option<String>,
     #[doc = "The pricing info of the Sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "The locations where Sku is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The locations where Sku is available with zones and sites info"]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfo>,
     #[doc = "The required quotaIds for the sku to be available."]
-    #[serde(rename = "requiredQuotaIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredQuotaIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_quota_ids: Vec<String>,
     #[doc = "The required features for the sku to be available."]
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
 }
 impl SkuInformation {
@@ -5873,7 +6086,11 @@ impl SkuInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuInformationList {
     #[doc = "List of ResourceTypeSku objects"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceTypeSku>,
     #[doc = "Links to the next set of results"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5891,10 +6108,18 @@ pub struct SkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "The zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The sites."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<String>,
 }
 impl SkuLocationInfo {
@@ -5946,7 +6171,11 @@ impl StorageAccountCredential {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountCredentialList {
     #[doc = "The value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccountCredential>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6089,7 +6318,11 @@ pub mod storage_account_credential_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountList {
     #[doc = "The list of storageAccounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccount>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6234,7 +6467,12 @@ pub struct SubscriptionProperties {
     pub quota_id: Option<String>,
     #[serde(rename = "serializedDetails", default, skip_serializing_if = "Option::is_none")]
     pub serialized_details: Option<String>,
-    #[serde(rename = "registeredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "registeredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub registered_features: Vec<SubscriptionRegisteredFeatures>,
 }
 impl SubscriptionProperties {
@@ -6481,7 +6719,11 @@ pub mod trigger {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TriggerList {
     #[doc = "The list of triggers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Trigger>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6894,10 +7136,19 @@ pub struct UpdateSummaryProperties {
     )]
     pub in_progress_install_job_started_date_time: Option<time::OffsetDateTime>,
     #[doc = "The list of updates available for install."]
-    #[serde(rename = "updateTitles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "updateTitles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub update_titles: Vec<String>,
     #[doc = "The list of updates available for install."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub updates: Vec<UpdateDetails>,
     #[doc = "The total size of updates available for download in bytes."]
     #[serde(rename = "totalUpdateSizeInBytes", default, skip_serializing_if = "Option::is_none")]
@@ -7253,7 +7504,11 @@ pub mod user_access_right {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserList {
     #[doc = "The list of users."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<User>,
     #[doc = "Link to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7277,7 +7532,12 @@ pub struct UserProperties {
     #[serde(rename = "encryptedPassword", default, skip_serializing_if = "Option::is_none")]
     pub encrypted_password: Option<AsymmetricEncryptedSecret>,
     #[doc = "List of shares that the user has rights on. This field should not be specified during user creation."]
-    #[serde(rename = "shareAccessRights", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareAccessRights",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_access_rights: Vec<ShareAccessRight>,
     #[doc = "Type of the user."]
     #[serde(rename = "userType")]
diff --git a/services/mgmt/databricks/src/package_2018_04_01/models.rs b/services/mgmt/databricks/src/package_2018_04_01/models.rs
index ef84d2f0da..de39e94839 100644
--- a/services/mgmt/databricks/src/package_2018_04_01/models.rs
+++ b/services/mgmt/databricks/src/package_2018_04_01/models.rs
@@ -7,7 +7,12 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AddressSpace {
     #[doc = "A list of address blocks reserved for this virtual network in CIDR notation."]
-    #[serde(rename = "addressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefixes: Vec<String>,
 }
 impl AddressSpace {
@@ -127,7 +132,11 @@ pub struct ErrorInfo {
     #[doc = "A human readable error message."]
     pub message: String,
     #[doc = "error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "Inner error details if they exist."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -217,7 +226,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Resource Provider operations supported by the Resource Provider resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -411,7 +424,11 @@ impl VirtualNetworkPeering {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkPeeringList {
     #[doc = "List of virtual network peerings on workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkPeering>,
     #[doc = "URL to get the next set of virtual network peering list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -721,7 +738,11 @@ impl WorkspaceEncryptionParameter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "The array of workspaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -754,7 +775,11 @@ pub struct WorkspaceProperties {
     #[serde(rename = "uiDefinitionUri", default, skip_serializing_if = "Option::is_none")]
     pub ui_definition_uri: Option<String>,
     #[doc = "The workspace provider authorizations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<WorkspaceProviderAuthorization>,
     #[doc = "Provides details of the entity that created/updated the workspace."]
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/databricks/src/package_2022_04_01_preview/models.rs b/services/mgmt/databricks/src/package_2022_04_01_preview/models.rs
index bc48435098..97e7ad4d2b 100644
--- a/services/mgmt/databricks/src/package_2022_04_01_preview/models.rs
+++ b/services/mgmt/databricks/src/package_2022_04_01_preview/models.rs
@@ -27,7 +27,11 @@ impl AccessConnector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessConnectorListResult {
     #[doc = "The array of azure databricks accessConnector."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessConnector>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -116,7 +120,12 @@ impl AccessConnectorUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AddressSpace {
     #[doc = "A list of address blocks reserved for this virtual network in CIDR notation."]
-    #[serde(rename = "addressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefixes: Vec<String>,
 }
 impl AddressSpace {
@@ -308,7 +317,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The Ports used when connecting to domainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -363,7 +377,11 @@ pub struct ErrorInfo {
     #[doc = "A human readable error message."]
     pub message: String,
     #[doc = "error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "Inner error details if they exist."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -430,10 +448,20 @@ pub struct GroupIdInformationProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The required members for a specific group id"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The required DNS zones for a specific group id"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl GroupIdInformationProperties {
@@ -561,7 +589,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Resource Provider operations supported by the Resource Provider resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -585,7 +617,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that Workspace connect to"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -741,7 +777,11 @@ impl Serialize for PrivateEndpointConnectionProvisioningState {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionsList {
     #[doc = "The list of returned private endpoint connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URL to get the next set of endpoint connections."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -762,7 +802,11 @@ impl PrivateEndpointConnectionsList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesList {
     #[doc = "The list of available private link resources for a workspace"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupIdInformation>,
     #[doc = "The URL to get the next set of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -980,7 +1024,11 @@ impl VirtualNetworkPeering {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkPeeringList {
     #[doc = "List of virtual network peerings on workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkPeering>,
     #[doc = "URL to get the next set of virtual network peering list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1294,7 +1342,11 @@ impl WorkspaceEncryptionParameter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "The array of workspaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1327,7 +1379,11 @@ pub struct WorkspaceProperties {
     #[serde(rename = "uiDefinitionUri", default, skip_serializing_if = "Option::is_none")]
     pub ui_definition_uri: Option<String>,
     #[doc = "The workspace provider authorizations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<WorkspaceProviderAuthorization>,
     #[doc = "Provides details of the entity that created/updated the workspace."]
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
@@ -1351,7 +1407,12 @@ pub struct WorkspaceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<workspace_properties::Encryption>,
     #[doc = "Private endpoint connections created on the workspace"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The network access type for accessing workspace. Set value to disabled to access workspace only via private link."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/databricks/src/package_2022_10_01_preview/models.rs b/services/mgmt/databricks/src/package_2022_10_01_preview/models.rs
index df286d7633..9a738a5acf 100644
--- a/services/mgmt/databricks/src/package_2022_10_01_preview/models.rs
+++ b/services/mgmt/databricks/src/package_2022_10_01_preview/models.rs
@@ -27,7 +27,11 @@ impl AccessConnector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessConnectorListResult {
     #[doc = "The array of azure databricks accessConnector."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessConnector>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -116,7 +120,12 @@ impl AccessConnectorUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AddressSpace {
     #[doc = "A list of address blocks reserved for this virtual network in CIDR notation."]
-    #[serde(rename = "addressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefixes: Vec<String>,
 }
 impl AddressSpace {
@@ -308,7 +317,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The Ports used when connecting to domainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -363,7 +377,11 @@ pub struct ErrorInfo {
     #[doc = "A human readable error message."]
     pub message: String,
     #[doc = "error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "Inner error details if they exist."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -430,10 +448,20 @@ pub struct GroupIdInformationProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The required members for a specific group id"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The required DNS zones for a specific group id"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl GroupIdInformationProperties {
@@ -569,7 +597,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Resource Provider operations supported by the Resource Provider resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -593,7 +625,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that Workspace connect to"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -749,7 +785,11 @@ impl Serialize for PrivateEndpointConnectionProvisioningState {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionsList {
     #[doc = "The list of returned private endpoint connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URL to get the next set of endpoint connections."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -770,7 +810,11 @@ impl PrivateEndpointConnectionsList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesList {
     #[doc = "The list of available private link resources for a workspace"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupIdInformation>,
     #[doc = "The URL to get the next set of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1011,7 +1055,11 @@ impl VirtualNetworkPeering {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkPeeringList {
     #[doc = "List of virtual network peerings on workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkPeering>,
     #[doc = "URL to get the next set of virtual network peering list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1325,7 +1373,11 @@ impl WorkspaceEncryptionParameter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "The array of workspaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1358,7 +1410,11 @@ pub struct WorkspaceProperties {
     #[serde(rename = "uiDefinitionUri", default, skip_serializing_if = "Option::is_none")]
     pub ui_definition_uri: Option<String>,
     #[doc = "The workspace provider authorizations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<WorkspaceProviderAuthorization>,
     #[doc = "Provides details of the entity that created/updated the workspace."]
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
@@ -1382,7 +1438,12 @@ pub struct WorkspaceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<workspace_properties::Encryption>,
     #[doc = "Private endpoint connections created on the workspace"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The network access type for accessing workspace. Set value to disabled to access workspace only via private link."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/datacatalog/src/package_2016_03_30/models.rs b/services/mgmt/datacatalog/src/package_2016_03_30/models.rs
index 7ff4bd2d06..aaf4d52614 100644
--- a/services/mgmt/datacatalog/src/package_2016_03_30/models.rs
+++ b/services/mgmt/datacatalog/src/package_2016_03_30/models.rs
@@ -27,10 +27,18 @@ pub struct AdcCatalogProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub units: Option<i64>,
     #[doc = "Azure data catalog admin list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub admins: Vec<Principals>,
     #[doc = "Azure data catalog user list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub users: Vec<Principals>,
     #[doc = "Azure data catalog provision status."]
     #[serde(rename = "successfullyProvisioned", default, skip_serializing_if = "Option::is_none")]
@@ -88,7 +96,11 @@ pub mod adc_catalog_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdcCatalogsListResult {
     #[doc = "the list of Azure Data Catalogs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AdcCatalog>,
 }
 impl AdcCatalogsListResult {
@@ -136,7 +148,11 @@ impl OperationEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationEntityListResult {
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl OperationEntityListResult {
diff --git a/services/mgmt/datadog/src/package_2020_02_preview/models.rs b/services/mgmt/datadog/src/package_2020_02_preview/models.rs
index 111c0ae363..85de01c2c9 100644
--- a/services/mgmt/datadog/src/package_2020_02_preview/models.rs
+++ b/services/mgmt/datadog/src/package_2020_02_preview/models.rs
@@ -60,7 +60,11 @@ impl DatadogAgreementResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatadogAgreementResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatadogAgreementResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -105,7 +109,11 @@ impl DatadogApiKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatadogApiKeyListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatadogApiKey>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -128,10 +136,18 @@ pub struct DatadogHost {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The aliases for the host."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aliases: Vec<String>,
     #[doc = "The Datadog integrations reporting metrics for the host."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub apps: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub meta: Option<DatadogHostMetadata>,
@@ -145,7 +161,11 @@ impl DatadogHost {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatadogHostListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatadogHost>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -245,7 +265,11 @@ impl DatadogMonitorResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatadogMonitorResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatadogMonitorResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -364,7 +388,11 @@ impl DatadogSingleSignOnResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatadogSingleSignOnResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatadogSingleSignOnResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -389,7 +417,11 @@ pub struct ErrorResponseBody {
     pub message: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -484,7 +516,11 @@ impl LinkedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinkedResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkedResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -514,7 +550,12 @@ pub struct LogRules {
     #[serde(rename = "sendResourceLogs", default, skip_serializing_if = "Option::is_none")]
     pub send_resource_logs: Option<bool>,
     #[doc = "List of filtering tags to be used for capturing logs. This only takes effect if SendResourceLogs flag is enabled. If empty, all resources will be captured. If only Exclude action is specified, the rules will apply to the list of all available resources. If Include actions are specified, the rules will only include resources with the associated tags."]
-    #[serde(rename = "filteringTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filteringTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filtering_tags: Vec<FilteringTag>,
 }
 impl LogRules {
@@ -604,7 +645,12 @@ impl Serialize for MarketplaceSubscriptionStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricRules {
     #[doc = "List of filtering tags to be used for capturing metrics. If empty, all resources will be captured. If only Exclude action is specified, the rules will apply to the list of all available resources. If Include actions are specified, the rules will only include resources with the associated tags."]
-    #[serde(rename = "filteringTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filteringTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filtering_tags: Vec<FilteringTag>,
 }
 impl MetricRules {
@@ -680,7 +726,11 @@ impl MonitoredResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoredResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoredResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -764,7 +814,11 @@ impl MonitoringTagRules {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoringTagRulesListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoringTagRules>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -823,7 +877,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Datadog provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/datadog/src/package_2021_03/models.rs b/services/mgmt/datadog/src/package_2021_03/models.rs
index aa8b55e9de..02311aa767 100644
--- a/services/mgmt/datadog/src/package_2021_03/models.rs
+++ b/services/mgmt/datadog/src/package_2021_03/models.rs
@@ -63,7 +63,11 @@ impl DatadogAgreementResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatadogAgreementResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatadogAgreementResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -108,7 +112,11 @@ impl DatadogApiKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatadogApiKeyListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatadogApiKey>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -131,10 +139,18 @@ pub struct DatadogHost {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The aliases for the host."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aliases: Vec<String>,
     #[doc = "The Datadog integrations reporting metrics for the host."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub apps: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub meta: Option<DatadogHostMetadata>,
@@ -148,7 +164,11 @@ impl DatadogHost {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatadogHostListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatadogHost>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -252,7 +272,11 @@ impl DatadogMonitorResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatadogMonitorResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatadogMonitorResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -374,7 +398,11 @@ impl DatadogSingleSignOnResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatadogSingleSignOnResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatadogSingleSignOnResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -419,10 +447,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -535,7 +572,11 @@ impl LinkedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinkedResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkedResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -565,7 +606,12 @@ pub struct LogRules {
     #[serde(rename = "sendResourceLogs", default, skip_serializing_if = "Option::is_none")]
     pub send_resource_logs: Option<bool>,
     #[doc = "List of filtering tags to be used for capturing logs. This only takes effect if SendResourceLogs flag is enabled. If empty, all resources will be captured. If only Exclude action is specified, the rules will apply to the list of all available resources. If Include actions are specified, the rules will only include resources with the associated tags."]
-    #[serde(rename = "filteringTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filteringTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filtering_tags: Vec<FilteringTag>,
 }
 impl LogRules {
@@ -655,7 +701,12 @@ impl Serialize for MarketplaceSubscriptionStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricRules {
     #[doc = "List of filtering tags to be used for capturing metrics. If empty, all resources will be captured. If only Exclude action is specified, the rules will apply to the list of all available resources. If Include actions are specified, the rules will only include resources with the associated tags."]
-    #[serde(rename = "filteringTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filteringTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filtering_tags: Vec<FilteringTag>,
 }
 impl MetricRules {
@@ -731,7 +782,11 @@ impl MonitoredResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoredResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoredResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -818,7 +873,11 @@ impl MonitoringTagRules {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoringTagRulesListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoringTagRules>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -877,7 +936,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Datadog provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/datafactory/src/package_2017_09_preview/models.rs b/services/mgmt/datafactory/src/package_2017_09_preview/models.rs
index 77d5a14f85..667540bbe5 100644
--- a/services/mgmt/datafactory/src/package_2017_09_preview/models.rs
+++ b/services/mgmt/datafactory/src/package_2017_09_preview/models.rs
@@ -15,7 +15,12 @@ pub struct Activity {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Activity depends on condition."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<ActivityDependency>,
 }
 impl Activity {
@@ -168,7 +173,11 @@ pub struct Dataset {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<ParameterDefinitionSpecification>,
     #[doc = "List of tags that can be used for describing the Dataset."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub annotations: Vec<serde_json::Value>,
 }
 impl Dataset {
@@ -260,7 +269,11 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Array with additional error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
 }
 impl azure_core::Continuable for ErrorResponse {
@@ -573,7 +586,11 @@ pub struct IntegrationRuntimeMonitoringData {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Integration runtime node monitoring data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<IntegrationRuntimeNodeMonitoringData>,
 }
 impl IntegrationRuntimeMonitoringData {
@@ -888,7 +905,11 @@ pub struct LinkedService {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<ParameterDefinitionSpecification>,
     #[doc = "List of tags that can be used for describing the Dataset."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub annotations: Vec<serde_json::Value>,
 }
 impl LinkedService {
@@ -1017,7 +1038,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResponse {
     #[doc = "List of Data Factory operations supported by the Data Factory resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link to the next page of results, if any remaining results exist."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1089,7 +1114,11 @@ pub struct OperationMetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "Defines how often data for metrics becomes available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<OperationMetricAvailability>,
 }
 impl OperationMetricSpecification {
@@ -1113,10 +1142,20 @@ impl OperationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationServiceSpecification {
     #[doc = "Details about operations related to logs."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationLogSpecification>,
     #[doc = "Details about operations related to metrics."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetricSpecification>,
 }
 impl OperationServiceSpecification {
@@ -1215,7 +1254,11 @@ pub struct Pipeline {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of activities in pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub activities: Vec<Activity>,
     #[doc = "Definition of all parameters for an entity."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1224,7 +1267,11 @@ pub struct Pipeline {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub concurrency: Option<i64>,
     #[doc = "List of tags that can be used for describing the Pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub annotations: Vec<serde_json::Value>,
 }
 impl Pipeline {
@@ -1350,10 +1397,19 @@ pub struct PipelineRunFilterParameters {
     #[serde(rename = "lastUpdatedBefore", with = "azure_core::date::rfc3339")]
     pub last_updated_before: time::OffsetDateTime,
     #[doc = "List of filters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<PipelineRunQueryFilter>,
     #[doc = "List of OrderBy option."]
-    #[serde(rename = "orderBy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orderBy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub order_by: Vec<PipelineRunQueryOrderBy>,
 }
 impl PipelineRunFilterParameters {
diff --git a/services/mgmt/datafactory/src/package_2018_06/models.rs b/services/mgmt/datafactory/src/package_2018_06/models.rs
index 8276a09f8e..9a6974aa35 100644
--- a/services/mgmt/datafactory/src/package_2018_06/models.rs
+++ b/services/mgmt/datafactory/src/package_2018_06/models.rs
@@ -33,10 +33,20 @@ pub struct Activity {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Activity depends on condition."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<ActivityDependency>,
     #[doc = "Activity user properties."]
-    #[serde(rename = "userProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_properties: Vec<UserProperty>,
 }
 impl Activity {
@@ -1559,7 +1569,11 @@ pub struct AzureBlobFsSink {
     #[serde(rename = "copyBehavior", default, skip_serializing_if = "Option::is_none")]
     pub copy_behavior: Option<serde_json::Value>,
     #[doc = "Specify the custom metadata to be added to sink data. Type: array of objects (or Expression with resultType array of objects)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl AzureBlobFsSink {
@@ -4251,7 +4265,11 @@ pub struct BlobSink {
     #[serde(rename = "copyBehavior", default, skip_serializing_if = "Option::is_none")]
     pub copy_behavior: Option<serde_json::Value>,
     #[doc = "Specify the custom metadata to be added to sink data. Type: array of objects (or Expression with resultType array of objects)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl BlobSink {
@@ -4580,7 +4598,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Array with additional error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudError>,
 }
 impl CloudErrorBody {
@@ -5040,10 +5062,18 @@ pub struct CopyActivity {
     #[serde(rename = "typeProperties")]
     pub type_properties: CopyActivityTypeProperties,
     #[doc = "List of inputs for the activity."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<DatasetReference>,
     #[doc = "List of outputs for the activity."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<DatasetReference>,
 }
 impl CopyActivity {
@@ -5106,10 +5136,19 @@ pub struct CopyActivityTypeProperties {
     #[serde(rename = "logSettings", default, skip_serializing_if = "Option::is_none")]
     pub log_settings: Option<LogSettings>,
     #[doc = "Preserve Rules."]
-    #[serde(rename = "preserveRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preserveRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub preserve_rules: Vec<serde_json::Value>,
     #[doc = "Preserve rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub preserve: Vec<serde_json::Value>,
     #[doc = "Whether to enable Data Consistency validation. Type: boolean (or Expression with resultType boolean)."]
     #[serde(rename = "validateDataConsistency", default, skip_serializing_if = "Option::is_none")]
@@ -5738,7 +5777,11 @@ pub struct Credential {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of tags that can be used for describing the Credential."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub annotations: Vec<serde_json::Value>,
 }
 impl Credential {
@@ -5840,10 +5883,19 @@ impl CustomActivity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomActivityReferenceObject {
     #[doc = "Linked service references."]
-    #[serde(rename = "linkedServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_services: Vec<LinkedServiceReference>,
     #[doc = "Dataset references."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datasets: Vec<DatasetReference>,
 }
 impl CustomActivityReferenceObject {
@@ -5997,7 +6049,12 @@ impl DwCopyCommandDefaultValue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DwCopyCommandSettings {
     #[doc = "Specifies the default values for each target column in SQL DW. The default values in the property overwrite the DEFAULT constraint set in the DB, and identity column cannot have a default value. Type: array of objects (or Expression with resultType array of objects)."]
-    #[serde(rename = "defaultValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_values: Vec<DwCopyCommandDefaultValue>,
     #[doc = "Additional options directly passed to SQL DW in Copy Command. Type: key value pairs (value should be string type) (or Expression with resultType object). Example: \"additionalOptions\": { \"MAXERRORS\": \"1000\", \"DATEFORMAT\": \"'ymd'\" }"]
     #[serde(rename = "additionalOptions", default, skip_serializing_if = "Option::is_none")]
@@ -6018,7 +6075,11 @@ pub struct DataFlow {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of tags that can be used for describing the data flow."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub annotations: Vec<serde_json::Value>,
     #[doc = "The folder that this data flow is in. If not specified, Data flow will appear at the root level."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6059,7 +6120,11 @@ pub struct DataFlowDebugCommandPayload {
     #[serde(rename = "rowLimits", default, skip_serializing_if = "Option::is_none")]
     pub row_limits: Option<i64>,
     #[doc = "Array of column names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<String>,
     #[doc = "The expression which is used for preview."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6163,13 +6228,27 @@ pub struct DataFlowDebugPackage {
     #[serde(rename = "dataFlow", default, skip_serializing_if = "Option::is_none")]
     pub data_flow: Option<DataFlowDebugResource>,
     #[doc = "List of Data flows"]
-    #[serde(rename = "dataFlows", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataFlows",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_flows: Vec<DataFlowDebugResource>,
     #[doc = "List of datasets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datasets: Vec<DatasetDebugResource>,
     #[doc = "List of linked services."]
-    #[serde(rename = "linkedServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_services: Vec<LinkedServiceDebugResource>,
     #[doc = "Staging info for execute data flow activity."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6189,7 +6268,12 @@ pub mod data_flow_debug_package {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct DebugSettings {
         #[doc = "Source setting for data flow debug."]
-        #[serde(rename = "sourceSettings", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "sourceSettings",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub source_settings: Vec<DataFlowSourceSetting>,
         #[doc = "An object mapping parameter names to argument values."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6530,7 +6614,11 @@ pub struct DatabricksNotebookActivityTypeProperties {
     #[serde(rename = "baseParameters", default, skip_serializing_if = "Option::is_none")]
     pub base_parameters: Option<serde_json::Value>,
     #[doc = "A list of libraries to be installed on the cluster that will execute the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub libraries: Vec<serde_json::Value>,
 }
 impl DatabricksNotebookActivityTypeProperties {
@@ -6566,10 +6654,18 @@ pub struct DatabricksSparkJarActivityTypeProperties {
     #[serde(rename = "mainClassName")]
     pub main_class_name: serde_json::Value,
     #[doc = "Parameters that will be passed to the main method."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<serde_json::Value>,
     #[doc = "A list of libraries to be installed on the cluster that will execute the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub libraries: Vec<serde_json::Value>,
 }
 impl DatabricksSparkJarActivityTypeProperties {
@@ -6605,10 +6701,18 @@ pub struct DatabricksSparkPythonActivityTypeProperties {
     #[serde(rename = "pythonFile")]
     pub python_file: serde_json::Value,
     #[doc = "Command line parameters that will be passed to the Python file."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<serde_json::Value>,
     #[doc = "A list of libraries to be installed on the cluster that will execute the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub libraries: Vec<serde_json::Value>,
 }
 impl DatabricksSparkPythonActivityTypeProperties {
@@ -6642,7 +6746,11 @@ pub struct Dataset {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<ParameterDefinitionSpecification>,
     #[doc = "List of tags that can be used for describing the Dataset."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub annotations: Vec<serde_json::Value>,
     #[doc = "The folder that this Dataset is in. If not specified, Dataset will appear at the root level."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8393,7 +8501,11 @@ pub struct ExecutePowerQueryActivityTypeProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sinks: Option<serde_json::Value>,
     #[doc = "List of mapping for Power Query mashup query to sink dataset(s)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub queries: Vec<PowerQuerySinkMapping>,
 }
 impl ExecutePowerQueryActivityTypeProperties {
@@ -9240,19 +9352,36 @@ impl Flowlet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FlowletTypeProperties {
     #[doc = "List of sources in Flowlet."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sources: Vec<DataFlowSource>,
     #[doc = "List of sinks in Flowlet."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sinks: Vec<DataFlowSink>,
     #[doc = "List of transformations in Flowlet."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transformations: Vec<Transformation>,
     #[doc = "Flowlet script."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub script: Option<String>,
     #[doc = "Flowlet script lines."]
-    #[serde(rename = "scriptLines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scriptLines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub script_lines: Vec<String>,
 }
 impl FlowletTypeProperties {
@@ -9530,7 +9659,12 @@ pub struct GetMetadataActivityTypeProperties {
     #[doc = "Dataset reference type."]
     pub dataset: DatasetReference,
     #[doc = "Fields of metadata to get from dataset."]
-    #[serde(rename = "fieldList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_list: Vec<serde_json::Value>,
     #[doc = "Connector read setting."]
     #[serde(rename = "storeSettings", default, skip_serializing_if = "Option::is_none")]
@@ -10471,10 +10605,19 @@ impl HdInsightHiveActivity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HdInsightHiveActivityTypeProperties {
     #[doc = "Storage linked service references."]
-    #[serde(rename = "storageLinkedServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageLinkedServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_linked_services: Vec<LinkedServiceReference>,
     #[doc = "User specified arguments to HDInsightActivity."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<serde_json::Value>,
     #[doc = "The HDInsightActivityDebugInfoOption settings to use."]
     #[serde(rename = "getDebugInfo", default, skip_serializing_if = "Option::is_none")]
@@ -10489,7 +10632,11 @@ pub struct HdInsightHiveActivityTypeProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub defines: Option<serde_json::Value>,
     #[doc = "User specified arguments under hivevar namespace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub variables: Vec<serde_json::Value>,
     #[doc = "Query timeout value (in minutes).  Effective when the HDInsight cluster is with ESP (Enterprise Security Package)"]
     #[serde(rename = "queryTimeout", default, skip_serializing_if = "Option::is_none")]
@@ -10580,10 +10727,19 @@ impl HdInsightMapReduceActivity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct HdInsightMapReduceActivityTypeProperties {
     #[doc = "Storage linked service references."]
-    #[serde(rename = "storageLinkedServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageLinkedServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_linked_services: Vec<LinkedServiceReference>,
     #[doc = "User specified arguments to HDInsightActivity."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<serde_json::Value>,
     #[doc = "The HDInsightActivityDebugInfoOption settings to use."]
     #[serde(rename = "getDebugInfo", default, skip_serializing_if = "Option::is_none")]
@@ -10598,7 +10754,12 @@ pub struct HdInsightMapReduceActivityTypeProperties {
     #[serde(rename = "jarLinkedService", default, skip_serializing_if = "Option::is_none")]
     pub jar_linked_service: Option<LinkedServiceReference>,
     #[doc = "Jar libs."]
-    #[serde(rename = "jarLibs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jarLibs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jar_libs: Vec<serde_json::Value>,
     #[doc = "Allows user to specify defines for the MapReduce job request."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10679,7 +10840,12 @@ pub struct HdInsightOnDemandLinkedServiceTypeProperties {
     #[serde(rename = "clusterSshPassword", default, skip_serializing_if = "Option::is_none")]
     pub cluster_ssh_password: Option<SecretBase>,
     #[doc = "Specifies additional storage accounts for the HDInsight linked service so that the Data Factory service can register them on your behalf."]
-    #[serde(rename = "additionalLinkedServiceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalLinkedServiceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_linked_service_names: Vec<LinkedServiceReference>,
     #[doc = "Linked service reference type."]
     #[serde(rename = "hcatalogLinkedServiceName", default, skip_serializing_if = "Option::is_none")]
@@ -10727,7 +10893,12 @@ pub struct HdInsightOnDemandLinkedServiceTypeProperties {
     #[serde(rename = "zookeeperNodeSize", default, skip_serializing_if = "Option::is_none")]
     pub zookeeper_node_size: Option<serde_json::Value>,
     #[doc = "Custom script actions to run on HDI ondemand cluster once it's up. Please refer to https://docs.microsoft.com/en-us/azure/hdinsight/hdinsight-hadoop-customize-cluster-linux?toc=%2Fen-us%2Fazure%2Fhdinsight%2Fr-server%2FTOC.json&bc=%2Fen-us%2Fazure%2Fbread%2Ftoc.json#understanding-script-actions."]
-    #[serde(rename = "scriptActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scriptActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub script_actions: Vec<ScriptAction>,
     #[doc = "The ARM resource ID for the vNet to which the cluster should be joined after creation. Type: string (or Expression with resultType string)."]
     #[serde(rename = "virtualNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -10808,7 +10979,12 @@ impl HdInsightPigActivity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HdInsightPigActivityTypeProperties {
     #[doc = "Storage linked service references."]
-    #[serde(rename = "storageLinkedServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageLinkedServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_linked_services: Vec<LinkedServiceReference>,
     #[doc = "User specified arguments to HDInsightActivity. Type: array (or Expression with resultType array)."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10858,7 +11034,11 @@ pub struct HdInsightSparkActivityTypeProperties {
     #[serde(rename = "entryFilePath")]
     pub entry_file_path: serde_json::Value,
     #[doc = "The user-specified arguments to HDInsightSparkActivity."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<serde_json::Value>,
     #[doc = "The HDInsightActivityDebugInfoOption settings to use."]
     #[serde(rename = "getDebugInfo", default, skip_serializing_if = "Option::is_none")]
@@ -10911,10 +11091,19 @@ impl HdInsightStreamingActivity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct HdInsightStreamingActivityTypeProperties {
     #[doc = "Storage linked service references."]
-    #[serde(rename = "storageLinkedServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageLinkedServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_linked_services: Vec<LinkedServiceReference>,
     #[doc = "User specified arguments to HDInsightActivity."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arguments: Vec<serde_json::Value>,
     #[doc = "The HDInsightActivityDebugInfoOption settings to use."]
     #[serde(rename = "getDebugInfo", default, skip_serializing_if = "Option::is_none")]
@@ -10937,7 +11126,12 @@ pub struct HdInsightStreamingActivityTypeProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub combiner: Option<serde_json::Value>,
     #[doc = "Command line environment values."]
-    #[serde(rename = "commandEnvironment", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commandEnvironment",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command_environment: Vec<serde_json::Value>,
     #[doc = "Allows user to specify defines for streaming job request."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11749,10 +11943,20 @@ pub struct IfConditionActivityTypeProperties {
     #[doc = "Azure Data Factory expression definition."]
     pub expression: Expression,
     #[doc = "List of activities to execute if expression is evaluated to true. This is an optional property and if not provided, the activity will exit without any action."]
-    #[serde(rename = "ifTrueActivities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ifTrueActivities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub if_true_activities: Vec<Activity>,
     #[doc = "List of activities to execute if expression is evaluated to false. This is an optional property and if not provided, the activity will exit without any action."]
-    #[serde(rename = "ifFalseActivities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ifFalseActivities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub if_false_activities: Vec<Activity>,
 }
 impl IfConditionActivityTypeProperties {
@@ -12327,7 +12531,11 @@ pub struct IntegrationRuntimeMonitoringData {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Integration runtime node monitoring data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<IntegrationRuntimeNodeMonitoringData>,
 }
 impl IntegrationRuntimeMonitoringData {
@@ -12387,7 +12595,11 @@ pub struct IntegrationRuntimeOutboundNetworkDependenciesCategoryEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints for outbound network dependency."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<IntegrationRuntimeOutboundNetworkDependenciesEndpoint>,
 }
 impl IntegrationRuntimeOutboundNetworkDependenciesCategoryEndpoint {
@@ -12402,7 +12614,12 @@ pub struct IntegrationRuntimeOutboundNetworkDependenciesEndpoint {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The details of endpoint."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<IntegrationRuntimeOutboundNetworkDependenciesEndpointDetails>,
 }
 impl IntegrationRuntimeOutboundNetworkDependenciesEndpoint {
@@ -12426,7 +12643,11 @@ impl IntegrationRuntimeOutboundNetworkDependenciesEndpointDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationRuntimeOutboundNetworkDependenciesEndpointsResponse {
     #[doc = "The list of outbound network dependency endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationRuntimeOutboundNetworkDependenciesCategoryEndpoint>,
 }
 impl IntegrationRuntimeOutboundNetworkDependenciesEndpointsResponse {
@@ -12622,10 +12843,20 @@ pub struct IntegrationRuntimeSsisProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub edition: Option<integration_runtime_ssis_properties::Edition>,
     #[doc = "Custom setup without script properties for a SSIS integration runtime."]
-    #[serde(rename = "expressCustomSetupProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "expressCustomSetupProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub express_custom_setup_properties: Vec<CustomSetupBase>,
     #[doc = "Package stores for the SSIS Integration Runtime."]
-    #[serde(rename = "packageStores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageStores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_stores: Vec<PackageStore>,
     #[doc = "Credential reference type."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -12863,7 +13094,12 @@ pub struct IntegrationRuntimeVNetProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub subnet: Option<String>,
     #[doc = "Resource IDs of the public IP addresses that this integration runtime will use."]
-    #[serde(rename = "publicIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_i_ps: Vec<String>,
     #[doc = "The ID of subnet, to which this Azure-SSIS integration runtime will be joined."]
     #[serde(rename = "subnetId", default, skip_serializing_if = "Option::is_none")]
@@ -13313,7 +13549,11 @@ pub struct LinkedService {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<ParameterDefinitionSpecification>,
     #[doc = "List of tags that can be used for describing the linked service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub annotations: Vec<serde_json::Value>,
 }
 impl LinkedService {
@@ -13661,7 +13901,11 @@ pub struct ManagedIntegrationRuntimeError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "Managed integration runtime error parameters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<String>,
     #[doc = "Error message."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -13682,7 +13926,11 @@ pub struct ManagedIntegrationRuntimeNode {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<managed_integration_runtime_node::Status>,
     #[doc = "The errors that occurred on this integration runtime node."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ManagedIntegrationRuntimeError>,
 }
 impl ManagedIntegrationRuntimeNode {
@@ -13750,7 +13998,11 @@ pub struct ManagedIntegrationRuntimeOperationResult {
     #[serde(rename = "errorCode", default, skip_serializing_if = "Option::is_none")]
     pub error_code: Option<String>,
     #[doc = "Managed integration runtime error parameters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<String>,
     #[doc = "The activity id for the operation request."]
     #[serde(rename = "activityId", default, skip_serializing_if = "Option::is_none")]
@@ -13788,10 +14040,19 @@ pub struct ManagedIntegrationRuntimeStatusTypeProperties {
     #[serde(rename = "createTime", default, with = "azure_core::date::rfc3339::option")]
     pub create_time: Option<time::OffsetDateTime>,
     #[doc = "The list of nodes for managed integration runtime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<ManagedIntegrationRuntimeNode>,
     #[doc = "The errors that occurred on this integration runtime."]
-    #[serde(rename = "otherErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "otherErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub other_errors: Vec<ManagedIntegrationRuntimeError>,
     #[doc = "Properties of managed integration runtime operation result."]
     #[serde(rename = "lastOperation", default, skip_serializing_if = "Option::is_none")]
@@ -13827,7 +14088,11 @@ pub struct ManagedPrivateEndpoint {
     #[serde(rename = "connectionState", default, skip_serializing_if = "Option::is_none")]
     pub connection_state: Option<ConnectionStateProperties>,
     #[doc = "Fully qualified domain names"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdns: Vec<String>,
     #[doc = "The groupId to which the managed private endpoint is created"]
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
@@ -13988,19 +14253,36 @@ impl MappingDataFlow {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MappingDataFlowTypeProperties {
     #[doc = "List of sources in data flow."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sources: Vec<DataFlowSource>,
     #[doc = "List of sinks in data flow."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sinks: Vec<DataFlowSink>,
     #[doc = "List of transformations in data flow."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transformations: Vec<Transformation>,
     #[doc = "DataFlow script."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub script: Option<String>,
     #[doc = "Data flow script lines."]
-    #[serde(rename = "scriptLines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scriptLines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub script_lines: Vec<String>,
 }
 impl MappingDataFlowTypeProperties {
@@ -14696,7 +14978,11 @@ pub struct MultiplePipelineTrigger {
     #[serde(flatten)]
     pub trigger: Trigger,
     #[doc = "Pipelines that need to be started."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pipelines: Vec<TriggerPipelineReference>,
 }
 impl MultiplePipelineTrigger {
@@ -15511,7 +15797,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResponse {
     #[doc = "List of Data Factory operations supported by the Data Factory resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link to the next page of results, if any remaining results exist."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15607,10 +15897,18 @@ pub struct OperationMetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "Defines how often data for metrics becomes available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<OperationMetricAvailability>,
     #[doc = "Defines the metric dimension."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<OperationMetricDimension>,
 }
 impl OperationMetricSpecification {
@@ -15634,10 +15932,20 @@ impl OperationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationServiceSpecification {
     #[doc = "Details about operations related to logs."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationLogSpecification>,
     #[doc = "Details about operations related to metrics."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetricSpecification>,
 }
 impl OperationServiceSpecification {
@@ -16656,7 +16964,11 @@ pub struct Pipeline {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of activities in pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub activities: Vec<Activity>,
     #[doc = "Definition of all parameters for an entity."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -16668,7 +16980,11 @@ pub struct Pipeline {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub concurrency: Option<i64>,
     #[doc = "List of tags that can be used for describing the Pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub annotations: Vec<serde_json::Value>,
     #[doc = "Dimensions emitted by Pipeline."]
     #[serde(rename = "runDimensions", default, skip_serializing_if = "Option::is_none")]
@@ -17054,7 +17370,12 @@ pub struct PowerQuerySinkMapping {
     #[serde(rename = "queryName", default, skip_serializing_if = "Option::is_none")]
     pub query_name: Option<String>,
     #[doc = "List of sinks mapped to Power Query mashup query."]
-    #[serde(rename = "dataflowSinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataflowSinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dataflow_sinks: Vec<PowerQuerySink>,
 }
 impl PowerQuerySinkMapping {
@@ -17083,7 +17404,11 @@ impl PowerQuerySource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PowerQueryTypeProperties {
     #[doc = "List of sources in Power Query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sources: Vec<PowerQuerySource>,
     #[doc = "Power query mashup script."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -17390,10 +17715,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "RequiredMembers of a private link resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "RequiredZoneNames of a private link resource"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -17427,7 +17762,11 @@ impl PurviewConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryDataFlowDebugSessionsResponse {
     #[doc = "Array with all active debug sessions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataFlowDebugSessionInfo>,
     #[doc = "The link to the next page of results, if any remaining results exist."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -17620,19 +17959,42 @@ impl Serialize for RecurrenceFrequency {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecurrenceSchedule {
     #[doc = "The minutes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minutes: Vec<i32>,
     #[doc = "The hours."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hours: Vec<i32>,
     #[doc = "The days of the week."]
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<String>,
     #[doc = "The month days."]
-    #[serde(rename = "monthDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub month_days: Vec<i32>,
     #[doc = "The monthly occurrences."]
-    #[serde(rename = "monthlyOccurrences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthlyOccurrences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monthly_occurrences: Vec<RecurrenceScheduleOccurrence>,
 }
 impl RecurrenceSchedule {
@@ -18208,10 +18570,19 @@ pub struct RunFilterParameters {
     #[serde(rename = "lastUpdatedBefore", with = "azure_core::date::rfc3339")]
     pub last_updated_before: time::OffsetDateTime,
     #[doc = "List of filters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<RunQueryFilter>,
     #[doc = "List of OrderBy option."]
-    #[serde(rename = "orderBy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orderBy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub order_by: Vec<RunQueryOrderBy>,
 }
 impl RunFilterParameters {
@@ -18696,7 +19067,12 @@ pub struct SsisPackageLocationTypeProperties {
     #[serde(rename = "packageLastModifiedDate", default, skip_serializing_if = "Option::is_none")]
     pub package_last_modified_date: Option<String>,
     #[doc = "The embedded child package list."]
-    #[serde(rename = "childPackages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childPackages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_packages: Vec<SsisChildPackage>,
 }
 impl SsisPackageLocationTypeProperties {
@@ -20425,7 +20801,11 @@ pub struct ScriptActivityScriptBlock {
     #[serde(rename = "type")]
     pub type_: script_activity_script_block::Type,
     #[doc = "Array of script parameters. Type: array."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ScriptActivityParameter>,
 }
 impl ScriptActivityScriptBlock {
@@ -20481,7 +20861,11 @@ pub mod script_activity_script_block {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScriptActivityTypeProperties {
     #[doc = "Array of script blocks. Type: array."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scripts: Vec<ScriptActivityScriptBlock>,
     #[doc = "Log settings of script activity."]
     #[serde(rename = "logSettings", default, skip_serializing_if = "Option::is_none")]
@@ -20803,7 +21187,11 @@ pub struct SelfHostedIntegrationRuntimeStatusTypeProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "The list of nodes for this integration runtime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<SelfHostedIntegrationRuntimeNode>,
     #[doc = "The date at which the integration runtime will be scheduled to update, in ISO8601 format."]
     #[serde(rename = "scheduledUpdateDate", default, with = "azure_core::date::rfc3339::option")]
@@ -20818,7 +21206,12 @@ pub struct SelfHostedIntegrationRuntimeStatusTypeProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capabilities: Option<serde_json::Value>,
     #[doc = "The URLs for the services used in integration runtime backend service."]
-    #[serde(rename = "serviceUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_urls: Vec<String>,
     #[doc = "The state of integration runtime auto update."]
     #[serde(rename = "autoUpdate", default, skip_serializing_if = "Option::is_none")]
@@ -20827,7 +21220,11 @@ pub struct SelfHostedIntegrationRuntimeStatusTypeProperties {
     #[serde(rename = "versionStatus", default, skip_serializing_if = "Option::is_none")]
     pub version_status: Option<String>,
     #[doc = "The list of linked integration runtimes that are created to share with this integration runtime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<LinkedIntegrationRuntime>,
     #[doc = "The version that the integration runtime is going to update to."]
     #[serde(rename = "pushedVersion", default, skip_serializing_if = "Option::is_none")]
@@ -22745,7 +23142,11 @@ pub struct SsisEnvironment {
     #[serde(rename = "folderId", default, skip_serializing_if = "Option::is_none")]
     pub folder_id: Option<i64>,
     #[doc = "Variable in environment"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub variables: Vec<SsisVariable>,
 }
 impl SsisEnvironment {
@@ -22819,7 +23220,11 @@ impl SsisObjectMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SsisObjectMetadataListResponse {
     #[doc = "List of SSIS object metadata."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SsisObjectMetadata>,
     #[doc = "The link to the next page of results, if any remaining results exist."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -22907,7 +23312,11 @@ pub struct SsisPackage {
     #[serde(rename = "projectId", default, skip_serializing_if = "Option::is_none")]
     pub project_id: Option<i64>,
     #[doc = "Parameters in package"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<SsisParameter>,
 }
 impl SsisPackage {
@@ -22978,10 +23387,19 @@ pub struct SsisProject {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<i64>,
     #[doc = "Environment reference in project"]
-    #[serde(rename = "environmentRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_refs: Vec<SsisEnvironmentReference>,
     #[doc = "Parameters in project"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<SsisParameter>,
 }
 impl SsisProject {
@@ -23213,10 +23631,19 @@ pub struct SwitchActivityTypeProperties {
     #[doc = "Azure Data Factory expression definition."]
     pub on: Expression,
     #[doc = "List of cases that correspond to expected values of the 'on' property. This is an optional property and if not provided, the activity will execute activities provided in defaultActivities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cases: Vec<SwitchCase>,
     #[doc = "List of activities to execute if no case condition is satisfied. This is an optional property and if not provided, the activity will exit without any action."]
-    #[serde(rename = "defaultActivities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultActivities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_activities: Vec<Activity>,
 }
 impl SwitchActivityTypeProperties {
@@ -23235,7 +23662,11 @@ pub struct SwitchCase {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     #[doc = "List of activities to execute for satisfied case condition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub activities: Vec<Activity>,
 }
 impl SwitchCase {
@@ -23496,7 +23927,11 @@ pub struct SynapseSparkJobActivityTypeProperties {
     #[serde(rename = "sparkJob")]
     pub spark_job: SynapseSparkJobReference,
     #[doc = "User specified arguments to SynapseSparkJobDefinitionActivity."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub args: Vec<serde_json::Value>,
     #[doc = "The main file used for the job, which will override the 'file' of the spark job definition you provide. Type: string (or Expression with resultType string)."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -23505,7 +23940,11 @@ pub struct SynapseSparkJobActivityTypeProperties {
     #[serde(rename = "className", default, skip_serializing_if = "Option::is_none")]
     pub class_name: Option<serde_json::Value>,
     #[doc = "Additional files used for reference in the main definition file, which will override the 'files' of the spark job definition you provide."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<serde_json::Value>,
     #[doc = "Big data pool reference type."]
     #[serde(rename = "targetBigDataPool", default, skip_serializing_if = "Option::is_none")]
@@ -24084,7 +24523,11 @@ pub struct Trigger {
     #[serde(rename = "runtimeState", default, skip_serializing_if = "Option::is_none")]
     pub runtime_state: Option<TriggerRuntimeState>,
     #[doc = "List of tags that can be used for describing the trigger."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub annotations: Vec<serde_json::Value>,
 }
 impl Trigger {
@@ -24532,7 +24975,12 @@ pub mod tumbling_window_trigger {
         #[serde(rename = "retryPolicy", default, skip_serializing_if = "Option::is_none")]
         pub retry_policy: Option<RetryPolicy>,
         #[doc = "Triggers that this trigger depends on. Only tumbling window triggers are supported."]
-        #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "dependsOn",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub depends_on: Vec<DependencyReference>,
     }
     impl TypeProperties {
@@ -25088,10 +25536,19 @@ pub struct WebActivityTypeProperties {
     #[serde(rename = "disableCertValidation", default, skip_serializing_if = "Option::is_none")]
     pub disable_cert_validation: Option<bool>,
     #[doc = "List of datasets passed to web endpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datasets: Vec<DatasetReference>,
     #[doc = "List of linked services passed to web endpoint."]
-    #[serde(rename = "linkedServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_services: Vec<LinkedServiceReference>,
     #[doc = "Integration runtime reference type."]
     #[serde(rename = "connectVia", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/datalakeanalytics/src/package_2015_10_preview/models.rs b/services/mgmt/datalakeanalytics/src/package_2015_10_preview/models.rs
index 0ea98c3047..3645fba00f 100644
--- a/services/mgmt/datalakeanalytics/src/package_2015_10_preview/models.rs
+++ b/services/mgmt/datalakeanalytics/src/package_2015_10_preview/models.rs
@@ -176,7 +176,11 @@ impl ComputePolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputePolicyListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputePolicy>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -297,13 +301,28 @@ pub struct CreateDataLakeAnalyticsAccountProperties {
     #[serde(rename = "dataLakeStoreAccounts")]
     pub data_lake_store_accounts: Vec<AddDataLakeStoreWithAccountParameters>,
     #[doc = "The list of Azure Blob Storage accounts associated with this account."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<AddStorageAccountWithAccountParameters>,
     #[doc = "The list of compute policies associated with this account."]
-    #[serde(rename = "computePolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "computePolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compute_policies: Vec<CreateComputePolicyWithAccountParameters>,
     #[doc = "The list of firewall rules associated with this account."]
-    #[serde(rename = "firewallRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_rules: Vec<CreateFirewallRuleWithAccountParameters>,
     #[doc = "The current state of the IP address firewall for this account."]
     #[serde(rename = "firewallState", default, skip_serializing_if = "Option::is_none")]
@@ -553,7 +572,11 @@ impl DataLakeAnalyticsAccountBasic {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataLakeAnalyticsAccountListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataLakeAnalyticsAccount>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -579,28 +602,63 @@ pub struct DataLakeAnalyticsAccountProperties {
     #[serde(rename = "defaultDataLakeStoreAccount", default, skip_serializing_if = "Option::is_none")]
     pub default_data_lake_store_account: Option<String>,
     #[doc = "The list of Data Lake Store accounts associated with this account."]
-    #[serde(rename = "dataLakeStoreAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataLakeStoreAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_lake_store_accounts: Vec<DataLakeStoreAccountInformation>,
     #[doc = "The list of Data Lake Store accounts associated with this account."]
-    #[serde(rename = "publicDataLakeStoreAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicDataLakeStoreAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_data_lake_store_accounts: Vec<DataLakeStoreAccountInformation>,
     #[doc = "The list of Azure Blob Storage accounts associated with this account."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<StorageAccountInformation>,
     #[doc = "The list of compute policies associated with this account."]
-    #[serde(rename = "computePolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "computePolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compute_policies: Vec<ComputePolicy>,
     #[doc = "The list of hiveMetastores associated with this account."]
-    #[serde(rename = "hiveMetastores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hiveMetastores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hive_metastores: Vec<HiveMetastore>,
     #[doc = "The hierarchical queue state associated with this account."]
     #[serde(rename = "hierarchicalQueueState", default, skip_serializing_if = "Option::is_none")]
     pub hierarchical_queue_state: Option<String>,
     #[doc = "The list of virtualNetwork rules associated with this account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "The list of firewall rules associated with this account."]
-    #[serde(rename = "firewallRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_rules: Vec<FirewallRule>,
     #[doc = "The current state of the IP address firewall for this account."]
     #[serde(rename = "firewallState", default, skip_serializing_if = "Option::is_none")]
@@ -789,7 +847,11 @@ impl DataLakeStoreAccountInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataLakeStoreAccountInformationListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataLakeStoreAccountInformation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -834,10 +896,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -881,7 +952,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -930,7 +1005,11 @@ impl HiveMetastore {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HiveMetastoreListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HiveMetastore>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1083,7 +1162,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1143,7 +1226,11 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "The availabilities for OperationMetaMetricSpecification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<OperationMetaMetricAvailabilitiesSpecification>,
 }
 impl OperationMetaMetricSpecification {
@@ -1164,10 +1251,20 @@ impl OperationMetaPropertyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationMetaServiceSpecification {
     #[doc = "The metricSpecifications for OperationMetaServiceSpecification."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetaMetricSpecification>,
     #[doc = "The logSpecifications for OperationMetaServiceSpecification."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationMetaLogSpecification>,
 }
 impl OperationMetaServiceSpecification {
@@ -1215,7 +1312,11 @@ impl SasTokenInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SasTokenInformationListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SasTokenInformation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1250,7 +1351,11 @@ impl StorageAccountInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountInformationListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccountInformation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1312,7 +1417,11 @@ impl StorageContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageContainerListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageContainer>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1467,16 +1576,36 @@ impl UpdateDataLakeAnalyticsAccountParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UpdateDataLakeAnalyticsAccountProperties {
     #[doc = "The list of Data Lake Store accounts associated with this account."]
-    #[serde(rename = "dataLakeStoreAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataLakeStoreAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_lake_store_accounts: Vec<UpdateDataLakeStoreWithAccountParameters>,
     #[doc = "The list of Azure Blob storage accounts associated with this account."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<UpdateStorageAccountWithAccountParameters>,
     #[doc = "The list of compute policies associated with this account."]
-    #[serde(rename = "computePolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "computePolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compute_policies: Vec<UpdateComputePolicyWithAccountParameters>,
     #[doc = "The list of firewall rules associated with this account."]
-    #[serde(rename = "firewallRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_rules: Vec<UpdateFirewallRuleWithAccountParameters>,
     #[doc = "The current state of the IP address firewall for this account. Disabling the firewall does not remove existing rules, they will just be ignored until the firewall is re-enabled."]
     #[serde(rename = "firewallState", default, skip_serializing_if = "Option::is_none")]
@@ -1670,7 +1799,11 @@ impl VirtualNetworkRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkRuleListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkRule>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/datalakeanalytics/src/package_2016_11/models.rs b/services/mgmt/datalakeanalytics/src/package_2016_11/models.rs
index 8f79985763..51a0426f9c 100644
--- a/services/mgmt/datalakeanalytics/src/package_2016_11/models.rs
+++ b/services/mgmt/datalakeanalytics/src/package_2016_11/models.rs
@@ -191,7 +191,11 @@ impl ComputePolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputePolicyListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputePolicy>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -312,13 +316,28 @@ pub struct CreateDataLakeAnalyticsAccountProperties {
     #[serde(rename = "dataLakeStoreAccounts")]
     pub data_lake_store_accounts: Vec<AddDataLakeStoreWithAccountParameters>,
     #[doc = "The list of Azure Blob Storage accounts associated with this account."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<AddStorageAccountWithAccountParameters>,
     #[doc = "The list of compute policies associated with this account."]
-    #[serde(rename = "computePolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "computePolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compute_policies: Vec<CreateComputePolicyWithAccountParameters>,
     #[doc = "The list of firewall rules associated with this account."]
-    #[serde(rename = "firewallRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_rules: Vec<CreateFirewallRuleWithAccountParameters>,
     #[doc = "The current state of the IP address firewall for this account."]
     #[serde(rename = "firewallState", default, skip_serializing_if = "Option::is_none")]
@@ -568,7 +587,11 @@ impl DataLakeAnalyticsAccountBasic {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataLakeAnalyticsAccountListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataLakeAnalyticsAccountBasic>,
     #[doc = "The current number of data lake analytics accounts under this subscription."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -597,25 +620,60 @@ pub struct DataLakeAnalyticsAccountProperties {
     #[serde(rename = "defaultDataLakeStoreAccount", default, skip_serializing_if = "Option::is_none")]
     pub default_data_lake_store_account: Option<String>,
     #[doc = "The list of Data Lake Store accounts associated with this account."]
-    #[serde(rename = "dataLakeStoreAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataLakeStoreAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_lake_store_accounts: Vec<DataLakeStoreAccountInformation>,
     #[doc = "The list of Data Lake Store accounts associated with this account."]
-    #[serde(rename = "publicDataLakeStoreAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicDataLakeStoreAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_data_lake_store_accounts: Vec<DataLakeStoreAccountInformation>,
     #[doc = "The list of Azure Blob Storage accounts associated with this account."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<StorageAccountInformation>,
     #[doc = "The list of compute policies associated with this account."]
-    #[serde(rename = "computePolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "computePolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compute_policies: Vec<ComputePolicy>,
     #[doc = "The list of hiveMetastores associated with this account."]
-    #[serde(rename = "hiveMetastores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hiveMetastores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hive_metastores: Vec<HiveMetastore>,
     #[doc = "The list of virtualNetwork rules associated with this account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "The list of firewall rules associated with this account."]
-    #[serde(rename = "firewallRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_rules: Vec<FirewallRule>,
     #[doc = "The current state of the IP address firewall for this account."]
     #[serde(rename = "firewallState", default, skip_serializing_if = "Option::is_none")]
@@ -801,7 +859,11 @@ impl DataLakeStoreAccountInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataLakeStoreAccountInformationListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataLakeStoreAccountInformation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -858,10 +920,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -905,7 +976,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -954,7 +1029,11 @@ impl HiveMetastore {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HiveMetastoreListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HiveMetastore>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1107,7 +1186,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1167,7 +1250,11 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "The availabilities for OperationMetaMetricSpecification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<OperationMetaMetricAvailabilitiesSpecification>,
 }
 impl OperationMetaMetricSpecification {
@@ -1188,10 +1275,20 @@ impl OperationMetaPropertyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationMetaServiceSpecification {
     #[doc = "The metricSpecifications for OperationMetaServiceSpecification."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetaMetricSpecification>,
     #[doc = "The logSpecifications for OperationMetaServiceSpecification."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationMetaLogSpecification>,
 }
 impl OperationMetaServiceSpecification {
@@ -1239,7 +1336,11 @@ impl SasTokenInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SasTokenInformationListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SasTokenInformation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1274,7 +1375,11 @@ impl StorageAccountInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountInformationListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccountInformation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1321,7 +1426,11 @@ impl StorageContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageContainerListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageContainer>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1476,16 +1585,36 @@ impl UpdateDataLakeAnalyticsAccountParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UpdateDataLakeAnalyticsAccountProperties {
     #[doc = "The list of Data Lake Store accounts associated with this account."]
-    #[serde(rename = "dataLakeStoreAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataLakeStoreAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_lake_store_accounts: Vec<UpdateDataLakeStoreWithAccountParameters>,
     #[doc = "The list of Azure Blob storage accounts associated with this account."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<UpdateStorageAccountWithAccountParameters>,
     #[doc = "The list of compute policies associated with this account."]
-    #[serde(rename = "computePolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "computePolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compute_policies: Vec<UpdateComputePolicyWithAccountParameters>,
     #[doc = "The list of firewall rules associated with this account."]
-    #[serde(rename = "firewallRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_rules: Vec<UpdateFirewallRuleWithAccountParameters>,
     #[doc = "The current state of the IP address firewall for this account. Disabling the firewall does not remove existing rules, they will just be ignored until the firewall is re-enabled."]
     #[serde(rename = "firewallState", default, skip_serializing_if = "Option::is_none")]
@@ -1679,7 +1808,11 @@ impl VirtualNetworkRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkRuleListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkRule>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/datalakeanalytics/src/package_preview_2019_11/models.rs b/services/mgmt/datalakeanalytics/src/package_preview_2019_11/models.rs
index 8fe731ca5c..9b64163f40 100644
--- a/services/mgmt/datalakeanalytics/src/package_preview_2019_11/models.rs
+++ b/services/mgmt/datalakeanalytics/src/package_preview_2019_11/models.rs
@@ -191,7 +191,11 @@ impl ComputePolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputePolicyListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputePolicy>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -312,13 +316,28 @@ pub struct CreateDataLakeAnalyticsAccountProperties {
     #[serde(rename = "dataLakeStoreAccounts")]
     pub data_lake_store_accounts: Vec<AddDataLakeStoreWithAccountParameters>,
     #[doc = "The list of Azure Blob Storage accounts associated with this account."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<AddStorageAccountWithAccountParameters>,
     #[doc = "The list of compute policies associated with this account."]
-    #[serde(rename = "computePolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "computePolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compute_policies: Vec<CreateComputePolicyWithAccountParameters>,
     #[doc = "The list of firewall rules associated with this account."]
-    #[serde(rename = "firewallRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_rules: Vec<CreateFirewallRuleWithAccountParameters>,
     #[doc = "The current state of the IP address firewall for this account."]
     #[serde(rename = "firewallState", default, skip_serializing_if = "Option::is_none")]
@@ -568,7 +587,11 @@ impl DataLakeAnalyticsAccountBasic {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataLakeAnalyticsAccountListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataLakeAnalyticsAccountBasic>,
     #[doc = "The current number of data lake analytics accounts under this subscription."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -600,25 +623,60 @@ pub struct DataLakeAnalyticsAccountProperties {
     #[serde(rename = "defaultDataLakeStoreAccount", default, skip_serializing_if = "Option::is_none")]
     pub default_data_lake_store_account: Option<String>,
     #[doc = "The list of Data Lake Store accounts associated with this account."]
-    #[serde(rename = "dataLakeStoreAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataLakeStoreAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_lake_store_accounts: Vec<DataLakeStoreAccountInformation>,
     #[doc = "The list of Data Lake Store accounts associated with this account."]
-    #[serde(rename = "publicDataLakeStoreAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicDataLakeStoreAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_data_lake_store_accounts: Vec<DataLakeStoreAccountInformation>,
     #[doc = "The list of Azure Blob Storage accounts associated with this account."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<StorageAccountInformation>,
     #[doc = "The list of compute policies associated with this account."]
-    #[serde(rename = "computePolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "computePolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compute_policies: Vec<ComputePolicy>,
     #[doc = "The list of hiveMetastores associated with this account."]
-    #[serde(rename = "hiveMetastores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hiveMetastores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hive_metastores: Vec<HiveMetastore>,
     #[doc = "The list of virtualNetwork rules associated with this account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "The list of firewall rules associated with this account."]
-    #[serde(rename = "firewallRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_rules: Vec<FirewallRule>,
     #[doc = "The current state of the IP address firewall for this account."]
     #[serde(rename = "firewallState", default, skip_serializing_if = "Option::is_none")]
@@ -804,7 +862,11 @@ impl DataLakeStoreAccountInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataLakeStoreAccountInformationListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataLakeStoreAccountInformation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -861,10 +923,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -908,7 +979,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -957,7 +1032,11 @@ impl HiveMetastore {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HiveMetastoreListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HiveMetastore>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1110,7 +1189,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1170,7 +1253,11 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "The availabilities for OperationMetaMetricSpecification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<OperationMetaMetricAvailabilitiesSpecification>,
 }
 impl OperationMetaMetricSpecification {
@@ -1191,10 +1278,20 @@ impl OperationMetaPropertyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationMetaServiceSpecification {
     #[doc = "The metricSpecifications for OperationMetaServiceSpecification."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetaMetricSpecification>,
     #[doc = "The logSpecifications for OperationMetaServiceSpecification."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationMetaLogSpecification>,
 }
 impl OperationMetaServiceSpecification {
@@ -1242,7 +1339,11 @@ impl SasTokenInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SasTokenInformationListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SasTokenInformation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1277,7 +1378,11 @@ impl StorageAccountInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountInformationListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccountInformation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1324,7 +1429,11 @@ impl StorageContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageContainerListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageContainer>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1479,16 +1588,36 @@ impl UpdateDataLakeAnalyticsAccountParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UpdateDataLakeAnalyticsAccountProperties {
     #[doc = "The list of Data Lake Store accounts associated with this account."]
-    #[serde(rename = "dataLakeStoreAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataLakeStoreAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_lake_store_accounts: Vec<UpdateDataLakeStoreWithAccountParameters>,
     #[doc = "The list of Azure Blob storage accounts associated with this account."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<UpdateStorageAccountWithAccountParameters>,
     #[doc = "The list of compute policies associated with this account."]
-    #[serde(rename = "computePolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "computePolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compute_policies: Vec<UpdateComputePolicyWithAccountParameters>,
     #[doc = "The list of firewall rules associated with this account."]
-    #[serde(rename = "firewallRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_rules: Vec<UpdateFirewallRuleWithAccountParameters>,
     #[doc = "The current state of the IP address firewall for this account. Disabling the firewall does not remove existing rules, they will just be ignored until the firewall is re-enabled."]
     #[serde(rename = "firewallState", default, skip_serializing_if = "Option::is_none")]
@@ -1682,7 +1811,11 @@ impl VirtualNetworkRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkRuleListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkRule>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/datalakestore/src/package_2015_10_preview/models.rs b/services/mgmt/datalakestore/src/package_2015_10_preview/models.rs
index 1de312345e..469b44a367 100644
--- a/services/mgmt/datalakestore/src/package_2015_10_preview/models.rs
+++ b/services/mgmt/datalakestore/src/package_2015_10_preview/models.rs
@@ -61,7 +61,11 @@ impl DataLakeStoreAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataLakeStoreAccountListResult {
     #[doc = "the results of the list operation"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataLakeStoreAccount>,
     #[doc = "the link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -156,7 +160,11 @@ pub mod data_lake_store_account_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataLakeStoreFirewallRuleListResult {
     #[doc = "the results of the list operation"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "the link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -236,7 +244,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "the list of error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetails>,
     #[doc = "Data Lake Store inner error information"]
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/datalakestore/src/package_2016_11/models.rs b/services/mgmt/datalakestore/src/package_2016_11/models.rs
index 87bc6c2698..356dcf9e12 100644
--- a/services/mgmt/datalakestore/src/package_2016_11/models.rs
+++ b/services/mgmt/datalakestore/src/package_2016_11/models.rs
@@ -131,10 +131,20 @@ pub struct CreateDataLakeStoreAccountProperties {
     #[serde(rename = "encryptionState", default, skip_serializing_if = "Option::is_none")]
     pub encryption_state: Option<create_data_lake_store_account_properties::EncryptionState>,
     #[doc = "The list of firewall rules associated with this Data Lake Store account."]
-    #[serde(rename = "firewallRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_rules: Vec<CreateFirewallRuleWithAccountParameters>,
     #[doc = "The list of virtual network rules associated with this Data Lake Store account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<CreateVirtualNetworkRuleWithAccountParameters>,
     #[doc = "The current state of the IP address firewall for this Data Lake Store account."]
     #[serde(rename = "firewallState", default, skip_serializing_if = "Option::is_none")]
@@ -143,7 +153,12 @@ pub struct CreateDataLakeStoreAccountProperties {
     #[serde(rename = "firewallAllowAzureIps", default, skip_serializing_if = "Option::is_none")]
     pub firewall_allow_azure_ips: Option<create_data_lake_store_account_properties::FirewallAllowAzureIps>,
     #[doc = "The list of trusted identity providers associated with this Data Lake Store account."]
-    #[serde(rename = "trustedIdProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedIdProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_id_providers: Vec<CreateTrustedIdProviderWithAccountParameters>,
     #[doc = "The current state of the trusted identity provider feature for this Data Lake Store account."]
     #[serde(rename = "trustedIdProviderState", default, skip_serializing_if = "Option::is_none")]
@@ -350,7 +365,11 @@ impl DataLakeStoreAccountBasic {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataLakeStoreAccountListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataLakeStoreAccountBasic>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -385,10 +404,20 @@ pub struct DataLakeStoreAccountProperties {
     #[serde(rename = "encryptionProvisioningState", default, skip_serializing_if = "Option::is_none")]
     pub encryption_provisioning_state: Option<data_lake_store_account_properties::EncryptionProvisioningState>,
     #[doc = "The list of firewall rules associated with this Data Lake Store account."]
-    #[serde(rename = "firewallRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_rules: Vec<FirewallRule>,
     #[doc = "The list of virtual network rules associated with this Data Lake Store account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "The current state of the IP address firewall for this Data Lake Store account."]
     #[serde(rename = "firewallState", default, skip_serializing_if = "Option::is_none")]
@@ -397,7 +426,12 @@ pub struct DataLakeStoreAccountProperties {
     #[serde(rename = "firewallAllowAzureIps", default, skip_serializing_if = "Option::is_none")]
     pub firewall_allow_azure_ips: Option<data_lake_store_account_properties::FirewallAllowAzureIps>,
     #[doc = "The list of trusted identity providers associated with this Data Lake Store account."]
-    #[serde(rename = "trustedIdProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedIdProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_id_providers: Vec<TrustedIdProvider>,
     #[doc = "The current state of the trusted identity provider feature for this Data Lake Store account."]
     #[serde(rename = "trustedIdProviderState", default, skip_serializing_if = "Option::is_none")]
@@ -607,7 +641,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -767,7 +805,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -838,7 +880,11 @@ impl TrustedIdProvider {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrustedIdProviderListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TrustedIdProvider>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -892,10 +938,20 @@ pub struct UpdateDataLakeStoreAccountProperties {
     #[serde(rename = "encryptionConfig", default, skip_serializing_if = "Option::is_none")]
     pub encryption_config: Option<UpdateEncryptionConfig>,
     #[doc = "The list of firewall rules associated with this Data Lake Store account."]
-    #[serde(rename = "firewallRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_rules: Vec<UpdateFirewallRuleWithAccountParameters>,
     #[doc = "The list of virtual network rules associated with this Data Lake Store account."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<UpdateVirtualNetworkRuleWithAccountParameters>,
     #[doc = "The current state of the IP address firewall for this Data Lake Store account. Disabling the firewall does not remove existing rules, they will just be ignored until the firewall is re-enabled."]
     #[serde(rename = "firewallState", default, skip_serializing_if = "Option::is_none")]
@@ -904,7 +960,12 @@ pub struct UpdateDataLakeStoreAccountProperties {
     #[serde(rename = "firewallAllowAzureIps", default, skip_serializing_if = "Option::is_none")]
     pub firewall_allow_azure_ips: Option<update_data_lake_store_account_properties::FirewallAllowAzureIps>,
     #[doc = "The list of trusted identity providers associated with this Data Lake Store account."]
-    #[serde(rename = "trustedIdProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedIdProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_id_providers: Vec<UpdateTrustedIdProviderWithAccountParameters>,
     #[doc = "The current state of the trusted identity provider feature for this Data Lake Store account. Disabling trusted identity provider functionality does not remove the providers, they will just be ignored until this feature is re-enabled."]
     #[serde(rename = "trustedIdProviderState", default, skip_serializing_if = "Option::is_none")]
@@ -1138,7 +1199,11 @@ pub mod usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "Gets or sets the list of Storage Resource Usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResult {
@@ -1185,7 +1250,11 @@ impl VirtualNetworkRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkRuleListResult {
     #[doc = "The results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkRule>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/datamigration/src/package_2018_04_19/models.rs b/services/mgmt/datamigration/src/package_2018_04_19/models.rs
index 741c16e609..0ea9125411 100644
--- a/services/mgmt/datamigration/src/package_2018_04_19/models.rs
+++ b/services/mgmt/datamigration/src/package_2018_04_19/models.rs
@@ -315,7 +315,12 @@ pub struct BackupSetInfo {
     #[serde(rename = "backupType", default, skip_serializing_if = "Option::is_none")]
     pub backup_type: Option<BackupType>,
     #[doc = "List of files in the backup set"]
-    #[serde(rename = "listOfBackupFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "listOfBackupFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub list_of_backup_files: Vec<BackupFileInfo>,
     #[doc = "Name of the database to which the backup set belongs"]
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
@@ -401,7 +406,11 @@ pub struct CommandProperties {
     #[serde(rename = "commandType")]
     pub command_type: String,
     #[doc = "Array of errors. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ODataError>,
     #[doc = "The state of the command. This is ignored if submitted."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -493,7 +502,11 @@ pub struct ConnectToSourceMySqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceMySqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceNonSqlTaskOutput>,
 }
 impl ConnectToSourceMySqlTaskProperties {
@@ -518,10 +531,19 @@ pub struct ConnectToSourceNonSqlTaskOutput {
     #[serde(rename = "serverProperties", default, skip_serializing_if = "Option::is_none")]
     pub server_properties: Option<ServerProperties>,
     #[doc = "List of databases on the server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourceNonSqlTaskOutput {
@@ -551,13 +573,22 @@ pub struct ConnectToSourcePostgreSqlSyncTaskOutput {
     #[serde(rename = "sourceServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_version: Option<String>,
     #[doc = "List of databases on source server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Source server brand version"]
     #[serde(rename = "sourceServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourcePostgreSqlSyncTaskOutput {
@@ -574,7 +605,11 @@ pub struct ConnectToSourcePostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourcePostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourcePostgreSqlSyncTaskOutput>,
 }
 impl ConnectToSourcePostgreSqlSyncTaskProperties {
@@ -595,7 +630,11 @@ pub struct ConnectToSourceSqlServerSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceSqlServerTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceSqlServerTaskOutput>,
 }
 impl ConnectToSourceSqlServerSyncTaskProperties {
@@ -697,7 +736,12 @@ pub struct ConnectToSourceSqlServerTaskOutputDatabaseLevel {
     #[serde(rename = "sizeMB", default, skip_serializing_if = "Option::is_none")]
     pub size_mb: Option<f64>,
     #[doc = "The list of database files"]
-    #[serde(rename = "databaseFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_files: Vec<DatabaseFileInfo>,
     #[doc = "An enumeration of SQL Server database compatibility levels"]
     #[serde(rename = "compatibilityLevel", default, skip_serializing_if = "Option::is_none")]
@@ -772,7 +816,12 @@ pub struct ConnectToSourceSqlServerTaskOutputTaskLevel {
     #[serde(rename = "sourceServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_brand_version: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourceSqlServerTaskOutputTaskLevel {
@@ -797,7 +846,11 @@ pub struct ConnectToSourceSqlServerTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceSqlServerTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceSqlServerTaskOutput>,
 }
 impl ConnectToSourceSqlServerTaskProperties {
@@ -837,13 +890,22 @@ pub struct ConnectToTargetAzureDbForMySqlTaskOutput {
     #[serde(rename = "serverVersion", default, skip_serializing_if = "Option::is_none")]
     pub server_version: Option<String>,
     #[doc = "List of databases on target server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Target server brand version"]
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetAzureDbForMySqlTaskOutput {
@@ -860,7 +922,11 @@ pub struct ConnectToTargetAzureDbForMySqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetAzureDbForMySqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetAzureDbForMySqlTaskOutput>,
 }
 impl ConnectToTargetAzureDbForMySqlTaskProperties {
@@ -900,13 +966,22 @@ pub struct ConnectToTargetAzureDbForPostgreSqlSyncTaskOutput {
     #[serde(rename = "targetServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_version: Option<String>,
     #[doc = "List of databases on target server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Target server brand version"]
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetAzureDbForPostgreSqlSyncTaskOutput {
@@ -923,7 +998,11 @@ pub struct ConnectToTargetAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetAzureDbForPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetAzureDbForPostgreSqlSyncTaskOutput>,
 }
 impl ConnectToTargetAzureDbForPostgreSqlSyncTaskProperties {
@@ -977,7 +1056,11 @@ pub struct ConnectToTargetSqlDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlDbTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlDbTaskOutput>,
 }
 impl ConnectToTargetSqlDbTaskProperties {
@@ -1017,7 +1100,12 @@ pub struct ConnectToTargetSqlMiSyncTaskOutput {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetSqlMiSyncTaskOutput {
@@ -1034,7 +1122,11 @@ pub struct ConnectToTargetSqlMiSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlMiSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlMiSyncTaskOutput>,
 }
 impl ConnectToTargetSqlMiSyncTaskProperties {
@@ -1071,13 +1163,27 @@ pub struct ConnectToTargetSqlMiTaskOutput {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "List of logins on the target server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logins: Vec<String>,
     #[doc = "List of agent jobs on the target server."]
-    #[serde(rename = "agentJobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentJobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_jobs: Vec<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetSqlMiTaskOutput {
@@ -1094,7 +1200,11 @@ pub struct ConnectToTargetSqlMiTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlMiTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlMiTaskOutput>,
 }
 impl ConnectToTargetSqlMiTaskProperties {
@@ -1133,7 +1243,11 @@ pub struct ConnectToTargetSqlSqlDbSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlSqlDbSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlDbTaskOutput>,
 }
 impl ConnectToTargetSqlSqlDbSyncTaskProperties {
@@ -1258,7 +1372,12 @@ pub struct DataMigrationProjectMetadata {
     #[serde(rename = "targetUsingWinAuth", default, skip_serializing_if = "Option::is_none")]
     pub target_using_win_auth: Option<bool>,
     #[doc = "List of tables selected for migration"]
-    #[serde(rename = "selectedMigrationTables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedMigrationTables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_migration_tables: Vec<MigrationTableMetadata>,
 }
 impl DataMigrationProjectMetadata {
@@ -1299,7 +1418,11 @@ impl DataMigrationService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataMigrationServiceList {
     #[doc = "List of services"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataMigrationService>,
     #[doc = "URL to load the next page of services"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1407,7 +1530,12 @@ pub struct DataMigrationServiceStatusResponse {
     #[serde(rename = "vmSize", default, skip_serializing_if = "Option::is_none")]
     pub vm_size: Option<String>,
     #[doc = "The list of supported task types"]
-    #[serde(rename = "supportedTaskTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTaskTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_task_types: Vec<String>,
 }
 impl DataMigrationServiceStatusResponse {
@@ -1485,7 +1613,12 @@ pub struct DatabaseBackupInfo {
     #[serde(rename = "backupType", default, skip_serializing_if = "Option::is_none")]
     pub backup_type: Option<BackupType>,
     #[doc = "The list of backup files for the current database."]
-    #[serde(rename = "backupFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_files: Vec<String>,
     #[doc = "Position of current database backup in the file."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1974,7 +2107,12 @@ pub struct ExecutionStatistics {
     #[serde(rename = "hasErrors", default, skip_serializing_if = "Option::is_none")]
     pub has_errors: Option<bool>,
     #[doc = "List of sql Errors"]
-    #[serde(rename = "sqlErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sqlErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sql_errors: Vec<String>,
 }
 impl ExecutionStatistics {
@@ -2054,7 +2192,12 @@ pub struct GetTdeCertificatesSqlTaskOutput {
     #[serde(rename = "base64EncodedCertificates", default, skip_serializing_if = "Option::is_none")]
     pub base64_encoded_certificates: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetTdeCertificatesSqlTaskOutput {
@@ -2071,7 +2214,11 @@ pub struct GetTdeCertificatesSqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetTdeCertificatesSqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetTdeCertificatesSqlTaskOutput>,
 }
 impl GetTdeCertificatesSqlTaskProperties {
@@ -2127,7 +2274,12 @@ pub struct GetUserTablesSqlSyncTaskOutput {
     #[serde(rename = "tableValidationErrors", default, skip_serializing_if = "Option::is_none")]
     pub table_validation_errors: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesSqlSyncTaskOutput {
@@ -2144,7 +2296,11 @@ pub struct GetUserTablesSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesSqlSyncTaskOutput>,
 }
 impl GetUserTablesSqlSyncTaskProperties {
@@ -2184,7 +2340,12 @@ pub struct GetUserTablesSqlTaskOutput {
     #[serde(rename = "databasesToTables", default, skip_serializing_if = "Option::is_none")]
     pub databases_to_tables: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesSqlTaskOutput {
@@ -2201,7 +2362,11 @@ pub struct GetUserTablesSqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesSqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesSqlTaskOutput>,
 }
 impl GetUserTablesSqlTaskProperties {
@@ -2348,7 +2513,11 @@ impl MigrateMiSyncCompleteCommandInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrateMiSyncCompleteCommandOutput {
     #[doc = "List of errors that happened during the command execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ReportableException>,
 }
 impl MigrateMiSyncCompleteCommandOutput {
@@ -2450,7 +2619,11 @@ pub struct MigrateMySqlAzureDbForMySqlSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigrateMySqlAzureDbForMySqlSyncTaskOutputDatabaseError {
@@ -2612,7 +2785,11 @@ pub struct MigrateMySqlAzureDbForMySqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateMySqlAzureDbForMySqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateMySqlAzureDbForMySqlSyncTaskOutput>,
 }
 impl MigrateMySqlAzureDbForMySqlSyncTaskProperties {
@@ -2697,7 +2874,11 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutputDatabaseError {
@@ -2859,7 +3040,11 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigratePostgreSqlAzureDbForPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutput>,
 }
 impl MigratePostgreSqlAzureDbForPostgreSqlSyncTaskProperties {
@@ -2969,7 +3154,11 @@ pub struct MigrateSqlServerSqlDbSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigrateSqlServerSqlDbSyncTaskOutputDatabaseError {
@@ -3134,7 +3323,11 @@ pub struct MigrateSqlServerSqlDbSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlDbSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlDbSyncTaskOutput>,
 }
 impl MigrateSqlServerSqlDbSyncTaskProperties {
@@ -3224,7 +3417,12 @@ pub struct MigrateSqlServerSqlDbTaskOutputDatabaseLevel {
     #[serde(rename = "resultPrefix", default, skip_serializing_if = "Option::is_none")]
     pub result_prefix: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
     #[doc = "Summary of object results in the migration"]
     #[serde(rename = "objectSummary", default, skip_serializing_if = "Option::is_none")]
@@ -3366,7 +3564,12 @@ pub struct MigrateSqlServerSqlDbTaskOutputMigrationLevel {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlDbTaskOutputMigrationLevel {
@@ -3473,7 +3676,11 @@ pub struct MigrateSqlServerSqlDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlDbTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlDbTaskOutput>,
 }
 impl MigrateSqlServerSqlDbTaskProperties {
@@ -3497,7 +3704,12 @@ pub struct MigrateSqlServerSqlMiDatabaseInput {
     #[serde(rename = "backupFileShare", default, skip_serializing_if = "Option::is_none")]
     pub backup_file_share: Option<FileShare>,
     #[doc = "The list of backup files to be used in case of existing backups."]
-    #[serde(rename = "backupFilePaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupFilePaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_file_paths: Vec<String>,
 }
 impl MigrateSqlServerSqlMiDatabaseInput {
@@ -3561,7 +3773,12 @@ pub struct MigrateSqlServerSqlMiSyncTaskOutputDatabaseLevel {
     #[serde(rename = "lastRestoredBackupSetInfo", default, skip_serializing_if = "Option::is_none")]
     pub last_restored_backup_set_info: Option<BackupSetInfo>,
     #[doc = "Backup sets that are currently active (Either being uploaded or getting restored)"]
-    #[serde(rename = "activeBackupSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeBackupSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_backup_sets: Vec<BackupSetInfo>,
     #[doc = "Name of container created in the Azure Storage account where backups are copied to"]
     #[serde(rename = "containerName", default, skip_serializing_if = "Option::is_none")]
@@ -3573,7 +3790,12 @@ pub struct MigrateSqlServerSqlMiSyncTaskOutputDatabaseLevel {
     #[serde(rename = "isFullBackupRestored", default, skip_serializing_if = "Option::is_none")]
     pub is_full_backup_restored: Option<bool>,
     #[doc = "Migration exceptions and warnings"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiSyncTaskOutputDatabaseLevel {
@@ -3649,7 +3871,11 @@ pub struct MigrateSqlServerSqlMiSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlMiSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlMiSyncTaskOutput>,
 }
 impl MigrateSqlServerSqlMiSyncTaskProperties {
@@ -3670,10 +3896,20 @@ pub struct MigrateSqlServerSqlMiTaskInput {
     #[serde(rename = "selectedDatabases")]
     pub selected_databases: Vec<MigrateSqlServerSqlMiDatabaseInput>,
     #[doc = "Logins to migrate."]
-    #[serde(rename = "selectedLogins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedLogins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_logins: Vec<String>,
     #[doc = "Agent Jobs to migrate."]
-    #[serde(rename = "selectedAgentJobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedAgentJobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_agent_jobs: Vec<String>,
     #[doc = "File share information with Path, Username, and Password."]
     #[serde(rename = "backupFileShare", default, skip_serializing_if = "Option::is_none")]
@@ -3740,7 +3976,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputAgentJobLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Migration errors and warnings per job"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputAgentJobLevel {
@@ -3774,7 +4015,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputDatabaseLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Migration exceptions and warnings"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputDatabaseLevel {
@@ -3821,7 +4067,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputLoginLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Login migration errors and warnings per login"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputLoginLevel {
@@ -3858,7 +4109,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputMigrationLevel {
     #[serde(rename = "serverRoleResults", default, skip_serializing_if = "Option::is_none")]
     pub server_role_results: Option<String>,
     #[doc = "List of orphaned users."]
-    #[serde(rename = "orphanedUsersInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orphanedUsersInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub orphaned_users_info: Vec<OrphanedUserInfo>,
     #[doc = "Selected databases as a map from database name to database id"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3876,7 +4132,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputMigrationLevel {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputMigrationLevel {
@@ -3893,7 +4154,11 @@ pub struct MigrateSqlServerSqlMiTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlMiTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlMiTaskOutput>,
 }
 impl MigrateSqlServerSqlMiTaskProperties {
@@ -3918,7 +4183,12 @@ pub struct MigrateSqlServerSqlServerDatabaseInput {
     #[serde(rename = "backupAndRestoreFolder", default, skip_serializing_if = "Option::is_none")]
     pub backup_and_restore_folder: Option<String>,
     #[doc = "The list of database files"]
-    #[serde(rename = "databaseFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_files: Vec<DatabaseFileInput>,
 }
 impl MigrateSqlServerSqlServerDatabaseInput {
@@ -3951,7 +4221,11 @@ pub struct MigrateSyncCompleteCommandOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "List of errors that happened during the command execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ReportableException>,
 }
 impl MigrateSyncCompleteCommandOutput {
@@ -3987,7 +4261,12 @@ pub struct MigrationEligibilityInfo {
     #[serde(rename = "isEligibleForMigration", default, skip_serializing_if = "Option::is_none")]
     pub is_eligible_for_migration: Option<bool>,
     #[doc = "Information about eligibility failure for the server object."]
-    #[serde(rename = "validationMessages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationMessages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_messages: Vec<String>,
 }
 impl MigrationEligibilityInfo {
@@ -4338,7 +4617,11 @@ pub struct NonSqlDataMigrationTableResult {
     #[serde(rename = "elapsedTimeInMiliseconds", default, skip_serializing_if = "Option::is_none")]
     pub elapsed_time_in_miliseconds: Option<f64>,
     #[doc = "List of errors, if any, during migration"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<DataMigrationError>,
 }
 impl NonSqlDataMigrationTableResult {
@@ -4473,7 +4756,11 @@ pub struct ODataError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Inner errors that caused this error"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ODataError>,
 }
 impl ODataError {
@@ -4541,7 +4828,11 @@ impl Project {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProjectList {
     #[doc = "List of projects"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Project>,
     #[doc = "URL to load the next page of projects"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4577,7 +4868,12 @@ pub struct ProjectProperties {
     #[serde(rename = "targetConnectionInfo", default, skip_serializing_if = "Option::is_none")]
     pub target_connection_info: Option<ConnectionInfo>,
     #[doc = "List of DatabaseInfo"]
-    #[serde(rename = "databasesInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databasesInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases_info: Vec<DatabaseInfo>,
     #[doc = "The project's provisioning state"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -4736,13 +5032,21 @@ pub struct ProjectTaskProperties {
     #[serde(rename = "taskType")]
     pub task_type: String,
     #[doc = "Array of errors. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ODataError>,
     #[doc = "The state of the task. This is ignored if submitted."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<project_task_properties::State>,
     #[doc = "Array of command properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub commands: Vec<CommandProperties>,
 }
 impl ProjectTaskProperties {
@@ -4889,7 +5193,11 @@ pub mod quota {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaList {
     #[doc = "List of quotas"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Quota>,
     #[doc = "URL to load the next page of quotas, or null or missing if this is the last page"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4976,19 +5284,40 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<ResourceSkuCapacity>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The api versions that support this SKU."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Metadata for retrieving price info."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<ResourceSkuCosts>,
     #[doc = "A name value pair to describe the capability."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -5099,7 +5428,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason code for restriction."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -5396,7 +5729,11 @@ pub mod service_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceOperationList {
     #[doc = "List of actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceOperation>,
     #[doc = "URL to load the next page of actions"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5441,7 +5778,11 @@ impl ServiceSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSkuList {
     #[doc = "List of service SKUs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableServiceSku>,
     #[doc = "URL to load the next page of service SKUs"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5637,7 +5978,12 @@ pub struct StartMigrationScenarioServerRoleResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<MigrationState>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl StartMigrationScenarioServerRoleResult {
@@ -5784,7 +6130,11 @@ impl Serialize for SyncTableMigrationState {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskList {
     #[doc = "List of tasks"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProjectTask>,
     #[doc = "URL to load the next page of tasks"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5869,7 +6219,11 @@ pub struct ValidateMigrationInputSqlServerSqlDbSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ValidateSyncMigrationInputSqlServerTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateSyncMigrationInputSqlServerTaskOutput>,
 }
 impl ValidateMigrationInputSqlServerSqlDbSyncTaskProperties {
@@ -5904,7 +6258,12 @@ pub struct ValidateMigrationInputSqlServerSqlMiSyncTaskOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Errors associated with a selected database object"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ValidateMigrationInputSqlServerSqlMiSyncTaskOutput {
@@ -5921,7 +6280,11 @@ pub struct ValidateMigrationInputSqlServerSqlMiSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ValidateMigrationInputSqlServerSqlMiSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateMigrationInputSqlServerSqlMiSyncTaskOutput>,
 }
 impl ValidateMigrationInputSqlServerSqlMiSyncTaskProperties {
@@ -5946,7 +6309,12 @@ pub struct ValidateMigrationInputSqlServerSqlMiTaskInput {
     #[serde(rename = "selectedDatabases")]
     pub selected_databases: Vec<MigrateSqlServerSqlMiDatabaseInput>,
     #[doc = "Logins to migrate"]
-    #[serde(rename = "selectedLogins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedLogins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_logins: Vec<String>,
     #[doc = "File share information with Path, Username, and Password."]
     #[serde(rename = "backupFileShare", default, skip_serializing_if = "Option::is_none")]
@@ -5986,19 +6354,44 @@ pub struct ValidateMigrationInputSqlServerSqlMiTaskOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Errors associated with the RestoreDatabaseName"]
-    #[serde(rename = "restoreDatabaseNameErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreDatabaseNameErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_database_name_errors: Vec<ReportableException>,
     #[doc = "Errors associated with the BackupFolder path"]
-    #[serde(rename = "backupFolderErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupFolderErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_folder_errors: Vec<ReportableException>,
     #[doc = "Errors associated with backup share user name and password credentials"]
-    #[serde(rename = "backupShareCredentialsErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupShareCredentialsErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_share_credentials_errors: Vec<ReportableException>,
     #[doc = "Errors associated with the storage account provided."]
-    #[serde(rename = "backupStorageAccountErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupStorageAccountErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_storage_account_errors: Vec<ReportableException>,
     #[doc = "Errors associated with existing backup files."]
-    #[serde(rename = "existingBackupErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "existingBackupErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub existing_backup_errors: Vec<ReportableException>,
     #[doc = "Information about backup files when existing backup mode is used."]
     #[serde(rename = "databaseBackupInfo", default, skip_serializing_if = "Option::is_none")]
@@ -6018,7 +6411,11 @@ pub struct ValidateMigrationInputSqlServerSqlMiTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ValidateMigrationInputSqlServerSqlMiTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateMigrationInputSqlServerSqlMiTaskOutput>,
 }
 impl ValidateMigrationInputSqlServerSqlMiTaskProperties {
@@ -6066,7 +6463,12 @@ pub struct ValidateSyncMigrationInputSqlServerTaskOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Errors associated with a selected database object"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ValidateSyncMigrationInputSqlServerTaskOutput {
diff --git a/services/mgmt/datamigration/src/package_2021_06/models.rs b/services/mgmt/datamigration/src/package_2021_06/models.rs
index ee2e274dec..080ea48bcc 100644
--- a/services/mgmt/datamigration/src/package_2021_06/models.rs
+++ b/services/mgmt/datamigration/src/package_2021_06/models.rs
@@ -318,7 +318,12 @@ pub struct BackupSetInfo {
     #[serde(rename = "backupType", default, skip_serializing_if = "Option::is_none")]
     pub backup_type: Option<BackupType>,
     #[doc = "List of files in the backup set"]
-    #[serde(rename = "listOfBackupFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "listOfBackupFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub list_of_backup_files: Vec<BackupFileInfo>,
     #[doc = "Name of the database to which the backup set belongs"]
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
@@ -416,7 +421,12 @@ pub struct CheckOciDriverTaskOutput {
     #[serde(rename = "installedDriver", default, skip_serializing_if = "Option::is_none")]
     pub installed_driver: Option<OracleOciDriverInfo>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl CheckOciDriverTaskOutput {
@@ -433,7 +443,11 @@ pub struct CheckOciDriverTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<CheckOciDriverTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<CheckOciDriverTaskOutput>,
 }
 impl CheckOciDriverTaskProperties {
@@ -452,7 +466,11 @@ pub struct CommandProperties {
     #[serde(rename = "commandType")]
     pub command_type: String,
     #[doc = "Array of errors. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ODataError>,
     #[doc = "The state of the command. This is ignored if submitted."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -522,7 +540,11 @@ pub struct ConnectToMongoDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MongoDbConnectionInfo>,
     #[doc = "An array containing a single MongoDbClusterInfo object"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MongoDbClusterInfo>,
 }
 impl ConnectToMongoDbTaskProperties {
@@ -569,7 +591,11 @@ pub struct ConnectToSourceMySqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceMySqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceNonSqlTaskOutput>,
 }
 impl ConnectToSourceMySqlTaskProperties {
@@ -594,10 +620,19 @@ pub struct ConnectToSourceNonSqlTaskOutput {
     #[serde(rename = "serverProperties", default, skip_serializing_if = "Option::is_none")]
     pub server_properties: Option<ServerProperties>,
     #[doc = "List of databases on the server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourceNonSqlTaskOutput {
@@ -624,13 +659,22 @@ pub struct ConnectToSourceOracleSyncTaskOutput {
     #[serde(rename = "sourceServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_version: Option<String>,
     #[doc = "List of schemas on source server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Source server brand version"]
     #[serde(rename = "sourceServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourceOracleSyncTaskOutput {
@@ -647,7 +691,11 @@ pub struct ConnectToSourceOracleSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceOracleSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceOracleSyncTaskOutput>,
 }
 impl ConnectToSourceOracleSyncTaskProperties {
@@ -681,13 +729,22 @@ pub struct ConnectToSourcePostgreSqlSyncTaskOutput {
     #[serde(rename = "sourceServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_version: Option<String>,
     #[doc = "List of databases on source server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Source server brand version"]
     #[serde(rename = "sourceServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourcePostgreSqlSyncTaskOutput {
@@ -704,7 +761,11 @@ pub struct ConnectToSourcePostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourcePostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourcePostgreSqlSyncTaskOutput>,
 }
 impl ConnectToSourcePostgreSqlSyncTaskProperties {
@@ -725,7 +786,11 @@ pub struct ConnectToSourceSqlServerSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceSqlServerTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceSqlServerTaskOutput>,
 }
 impl ConnectToSourceSqlServerSyncTaskProperties {
@@ -811,7 +876,12 @@ pub struct ConnectToSourceSqlServerTaskOutputAgentJobLevel {
     #[serde(rename = "lastExecutedOn", default, with = "azure_core::date::rfc3339::option")]
     pub last_executed_on: Option<time::OffsetDateTime>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
     #[doc = "Information about migration eligibility of a server object"]
     #[serde(rename = "migrationEligibility", default, skip_serializing_if = "Option::is_none")]
@@ -843,7 +913,12 @@ pub struct ConnectToSourceSqlServerTaskOutputDatabaseLevel {
     #[serde(rename = "sizeMB", default, skip_serializing_if = "Option::is_none")]
     pub size_mb: Option<f64>,
     #[doc = "The list of database files"]
-    #[serde(rename = "databaseFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_files: Vec<DatabaseFileInfo>,
     #[doc = "An enumeration of SQL Server database compatibility levels"]
     #[serde(rename = "compatibilityLevel", default, skip_serializing_if = "Option::is_none")]
@@ -921,7 +996,12 @@ pub struct ConnectToSourceSqlServerTaskOutputTaskLevel {
     #[serde(rename = "sourceServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_brand_version: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourceSqlServerTaskOutputTaskLevel {
@@ -947,7 +1027,11 @@ pub struct ConnectToSourceSqlServerTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceSqlServerTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceSqlServerTaskOutput>,
 }
 impl ConnectToSourceSqlServerTaskProperties {
@@ -991,13 +1075,22 @@ pub struct ConnectToTargetAzureDbForMySqlTaskOutput {
     #[serde(rename = "serverVersion", default, skip_serializing_if = "Option::is_none")]
     pub server_version: Option<String>,
     #[doc = "List of databases on target server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Target server brand version"]
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetAzureDbForMySqlTaskOutput {
@@ -1014,7 +1107,11 @@ pub struct ConnectToTargetAzureDbForMySqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetAzureDbForMySqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetAzureDbForMySqlTaskOutput>,
 }
 impl ConnectToTargetAzureDbForMySqlTaskProperties {
@@ -1054,13 +1151,22 @@ pub struct ConnectToTargetAzureDbForPostgreSqlSyncTaskOutput {
     #[serde(rename = "targetServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_version: Option<String>,
     #[doc = "List of databases on target server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Target server brand version"]
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetAzureDbForPostgreSqlSyncTaskOutput {
@@ -1077,7 +1183,11 @@ pub struct ConnectToTargetAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetAzureDbForPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetAzureDbForPostgreSqlSyncTaskOutput>,
 }
 impl ConnectToTargetAzureDbForPostgreSqlSyncTaskProperties {
@@ -1108,16 +1218,30 @@ pub struct ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskOutput {
     #[serde(rename = "targetServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_version: Option<String>,
     #[doc = "List of databases on target server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Target server brand version"]
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
     #[doc = "Mapping of schemas per database"]
-    #[serde(rename = "databaseSchemaMap", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseSchemaMap",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_schema_map: Vec<serde_json::Value>,
 }
 impl ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskOutput {
@@ -1134,7 +1258,11 @@ pub struct ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskOutput>,
 }
 impl ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskProperties {
@@ -1188,7 +1316,11 @@ pub struct ConnectToTargetSqlDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlDbTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlDbTaskOutput>,
 }
 impl ConnectToTargetSqlDbTaskProperties {
@@ -1228,7 +1360,12 @@ pub struct ConnectToTargetSqlMiSyncTaskOutput {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetSqlMiSyncTaskOutput {
@@ -1245,7 +1382,11 @@ pub struct ConnectToTargetSqlMiSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlMiSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlMiSyncTaskOutput>,
 }
 impl ConnectToTargetSqlMiSyncTaskProperties {
@@ -1296,13 +1437,27 @@ pub struct ConnectToTargetSqlMiTaskOutput {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "List of logins on the target server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logins: Vec<String>,
     #[doc = "List of agent jobs on the target server."]
-    #[serde(rename = "agentJobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentJobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_jobs: Vec<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetSqlMiTaskOutput {
@@ -1319,7 +1474,11 @@ pub struct ConnectToTargetSqlMiTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlMiTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlMiTaskOutput>,
 }
 impl ConnectToTargetSqlMiTaskProperties {
@@ -1358,7 +1517,11 @@ pub struct ConnectToTargetSqlSqlDbSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlSqlDbSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlDbTaskOutput>,
 }
 impl ConnectToTargetSqlSqlDbSyncTaskProperties {
@@ -1483,7 +1646,12 @@ pub struct DataMigrationProjectMetadata {
     #[serde(rename = "targetUsingWinAuth", default, skip_serializing_if = "Option::is_none")]
     pub target_using_win_auth: Option<bool>,
     #[doc = "List of tables selected for migration"]
-    #[serde(rename = "selectedMigrationTables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedMigrationTables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_migration_tables: Vec<MigrationTableMetadata>,
 }
 impl DataMigrationProjectMetadata {
@@ -1528,7 +1696,11 @@ impl DataMigrationService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataMigrationServiceList {
     #[doc = "List of services"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataMigrationService>,
     #[doc = "URL to load the next page of services"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1640,7 +1812,12 @@ pub struct DataMigrationServiceStatusResponse {
     #[serde(rename = "vmSize", default, skip_serializing_if = "Option::is_none")]
     pub vm_size: Option<String>,
     #[doc = "The list of supported task types"]
-    #[serde(rename = "supportedTaskTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTaskTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_task_types: Vec<String>,
 }
 impl DataMigrationServiceStatusResponse {
@@ -1718,7 +1895,12 @@ pub struct DatabaseBackupInfo {
     #[serde(rename = "backupType", default, skip_serializing_if = "Option::is_none")]
     pub backup_type: Option<BackupType>,
     #[doc = "The list of backup files for the current database."]
-    #[serde(rename = "backupFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_files: Vec<String>,
     #[doc = "Position of current database backup in the file."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2207,7 +2389,12 @@ pub struct ExecutionStatistics {
     #[serde(rename = "hasErrors", default, skip_serializing_if = "Option::is_none")]
     pub has_errors: Option<bool>,
     #[doc = "List of sql Errors"]
-    #[serde(rename = "sqlErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sqlErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sql_errors: Vec<String>,
 }
 impl ExecutionStatistics {
@@ -2219,7 +2406,11 @@ impl ExecutionStatistics {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileList {
     #[doc = "List of files"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProjectFile>,
     #[doc = "URL to load the next page of files"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2322,7 +2513,12 @@ pub struct GetTdeCertificatesSqlTaskOutput {
     #[serde(rename = "base64EncodedCertificates", default, skip_serializing_if = "Option::is_none")]
     pub base64_encoded_certificates: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetTdeCertificatesSqlTaskOutput {
@@ -2339,7 +2535,11 @@ pub struct GetTdeCertificatesSqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetTdeCertificatesSqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetTdeCertificatesSqlTaskOutput>,
 }
 impl GetTdeCertificatesSqlTaskProperties {
@@ -2379,7 +2579,12 @@ pub struct GetUserTablesMySqlTaskOutput {
     #[serde(rename = "databasesToTables", default, skip_serializing_if = "Option::is_none")]
     pub databases_to_tables: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesMySqlTaskOutput {
@@ -2396,7 +2601,11 @@ pub struct GetUserTablesMySqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesMySqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesMySqlTaskOutput>,
 }
 impl GetUserTablesMySqlTaskProperties {
@@ -2433,10 +2642,19 @@ pub struct GetUserTablesOracleTaskOutput {
     #[serde(rename = "schemaName", default, skip_serializing_if = "Option::is_none")]
     pub schema_name: Option<String>,
     #[doc = "List of valid tables found for this schema"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<DatabaseTable>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesOracleTaskOutput {
@@ -2453,7 +2671,11 @@ pub struct GetUserTablesOracleTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesOracleTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesOracleTaskOutput>,
 }
 impl GetUserTablesOracleTaskProperties {
@@ -2490,10 +2712,19 @@ pub struct GetUserTablesPostgreSqlTaskOutput {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "List of valid tables found for this database"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<DatabaseTable>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesPostgreSqlTaskOutput {
@@ -2510,7 +2741,11 @@ pub struct GetUserTablesPostgreSqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesPostgreSqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesPostgreSqlTaskOutput>,
 }
 impl GetUserTablesPostgreSqlTaskProperties {
@@ -2566,7 +2801,12 @@ pub struct GetUserTablesSqlSyncTaskOutput {
     #[serde(rename = "tableValidationErrors", default, skip_serializing_if = "Option::is_none")]
     pub table_validation_errors: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesSqlSyncTaskOutput {
@@ -2583,7 +2823,11 @@ pub struct GetUserTablesSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesSqlSyncTaskOutput>,
 }
 impl GetUserTablesSqlSyncTaskProperties {
@@ -2623,7 +2867,12 @@ pub struct GetUserTablesSqlTaskOutput {
     #[serde(rename = "databasesToTables", default, skip_serializing_if = "Option::is_none")]
     pub databases_to_tables: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesSqlTaskOutput {
@@ -2640,7 +2889,11 @@ pub struct GetUserTablesSqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesSqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesSqlTaskOutput>,
 }
 impl GetUserTablesSqlTaskProperties {
@@ -2668,7 +2921,12 @@ impl InstallOciDriverTaskInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstallOciDriverTaskOutput {
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl InstallOciDriverTaskOutput {
@@ -2685,7 +2943,11 @@ pub struct InstallOciDriverTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<InstallOciDriverTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<InstallOciDriverTaskOutput>,
 }
 impl InstallOciDriverTaskProperties {
@@ -2832,7 +3094,11 @@ impl MigrateMiSyncCompleteCommandInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrateMiSyncCompleteCommandOutput {
     #[doc = "List of errors that happened during the command execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ReportableException>,
 }
 impl MigrateMiSyncCompleteCommandOutput {
@@ -2869,7 +3135,11 @@ pub struct MigrateMongoDbTaskProperties {
     #[doc = "Describes how a MongoDB data migration should be performed"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MongoDbMigrationSettings>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MongoDbProgress>,
 }
 impl MigrateMongoDbTaskProperties {
@@ -2961,7 +3231,11 @@ pub struct MigrateMySqlAzureDbForMySqlOfflineTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateMySqlAzureDbForMySqlOfflineTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateMySqlAzureDbForMySqlOfflineTaskOutput>,
 }
 impl MigrateMySqlAzureDbForMySqlOfflineTaskProperties {
@@ -3049,7 +3323,11 @@ pub struct MigrateMySqlAzureDbForMySqlSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigrateMySqlAzureDbForMySqlSyncTaskOutputDatabaseError {
@@ -3258,7 +3536,11 @@ pub struct MigrateMySqlAzureDbForMySqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateMySqlAzureDbForMySqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateMySqlAzureDbForMySqlSyncTaskOutput>,
 }
 impl MigrateMySqlAzureDbForMySqlSyncTaskProperties {
@@ -3279,7 +3561,11 @@ pub struct MigrateOracleAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateOracleAzureDbPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateOracleAzureDbPostgreSqlSyncTaskOutput>,
 }
 impl MigrateOracleAzureDbForPostgreSqlSyncTaskProperties {
@@ -3373,7 +3659,11 @@ pub struct MigrateOracleAzureDbPostgreSqlSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigrateOracleAzureDbPostgreSqlSyncTaskOutputDatabaseError {
@@ -3592,7 +3882,12 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncDatabaseInput {
     #[serde(rename = "targetSetting", default, skip_serializing_if = "Option::is_none")]
     pub target_setting: Option<serde_json::Value>,
     #[doc = "Tables selected for migration"]
-    #[serde(rename = "selectedTables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedTables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_tables: Vec<MigratePostgreSqlAzureDbForPostgreSqlSyncDatabaseTableInput>,
 }
 impl MigratePostgreSqlAzureDbForPostgreSqlSyncDatabaseInput {
@@ -3661,7 +3956,11 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutputDatabaseError {
@@ -3882,7 +4181,11 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigratePostgreSqlAzureDbForPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutput>,
 }
 impl MigratePostgreSqlAzureDbForPostgreSqlSyncTaskProperties {
@@ -4065,7 +4368,11 @@ pub struct MigrateSchemaSqlServerSqlDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSchemaSqlServerSqlDbTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSchemaSqlServerSqlDbTaskOutput>,
 }
 impl MigrateSchemaSqlServerSqlDbTaskProperties {
@@ -4191,7 +4498,11 @@ pub struct MigrateSqlServerSqlDbSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigrateSqlServerSqlDbSyncTaskOutputDatabaseError {
@@ -4404,7 +4715,11 @@ pub struct MigrateSqlServerSqlDbSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlDbSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlDbSyncTaskOutput>,
 }
 impl MigrateSqlServerSqlDbSyncTaskProperties {
@@ -4493,7 +4808,12 @@ pub struct MigrateSqlServerSqlDbTaskOutputDatabaseLevel {
     #[serde(rename = "resultPrefix", default, skip_serializing_if = "Option::is_none")]
     pub result_prefix: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
     #[doc = "Summary of object results in the migration"]
     #[serde(rename = "objectSummary", default, skip_serializing_if = "Option::is_none")]
@@ -4602,7 +4922,12 @@ pub struct MigrateSqlServerSqlDbTaskOutputMigrationLevel {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlDbTaskOutputMigrationLevel {
@@ -4699,7 +5024,11 @@ pub struct MigrateSqlServerSqlDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlDbTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlDbTaskOutput>,
 }
 impl MigrateSqlServerSqlDbTaskProperties {
@@ -4723,7 +5052,12 @@ pub struct MigrateSqlServerSqlMiDatabaseInput {
     #[serde(rename = "backupFileShare", default, skip_serializing_if = "Option::is_none")]
     pub backup_file_share: Option<FileShare>,
     #[doc = "The list of backup files to be used in case of existing backups."]
-    #[serde(rename = "backupFilePaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupFilePaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_file_paths: Vec<String>,
 }
 impl MigrateSqlServerSqlMiDatabaseInput {
@@ -4787,7 +5121,12 @@ pub struct MigrateSqlServerSqlMiSyncTaskOutputDatabaseLevel {
     #[serde(rename = "lastRestoredBackupSetInfo", default, skip_serializing_if = "Option::is_none")]
     pub last_restored_backup_set_info: Option<BackupSetInfo>,
     #[doc = "Backup sets that are currently active (Either being uploaded or getting restored)"]
-    #[serde(rename = "activeBackupSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeBackupSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_backup_sets: Vec<BackupSetInfo>,
     #[doc = "Name of container created in the Azure Storage account where backups are copied to"]
     #[serde(rename = "containerName", default, skip_serializing_if = "Option::is_none")]
@@ -4799,7 +5138,12 @@ pub struct MigrateSqlServerSqlMiSyncTaskOutputDatabaseLevel {
     #[serde(rename = "isFullBackupRestored", default, skip_serializing_if = "Option::is_none")]
     pub is_full_backup_restored: Option<bool>,
     #[doc = "Migration exceptions and warnings"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiSyncTaskOutputDatabaseLevel {
@@ -4905,7 +5249,11 @@ pub struct MigrateSqlServerSqlMiSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlMiSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlMiSyncTaskOutput>,
 }
 impl MigrateSqlServerSqlMiSyncTaskProperties {
@@ -4926,10 +5274,20 @@ pub struct MigrateSqlServerSqlMiTaskInput {
     #[serde(rename = "selectedDatabases")]
     pub selected_databases: Vec<MigrateSqlServerSqlMiDatabaseInput>,
     #[doc = "Logins to migrate."]
-    #[serde(rename = "selectedLogins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedLogins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_logins: Vec<String>,
     #[doc = "Agent Jobs to migrate."]
-    #[serde(rename = "selectedAgentJobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedAgentJobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_agent_jobs: Vec<String>,
     #[doc = "File share information with Path, Username, and Password."]
     #[serde(rename = "backupFileShare", default, skip_serializing_if = "Option::is_none")]
@@ -5000,7 +5358,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputAgentJobLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Migration errors and warnings per job"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputAgentJobLevel {
@@ -5043,7 +5406,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputDatabaseLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Migration exceptions and warnings"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputDatabaseLevel {
@@ -5104,7 +5472,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputLoginLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Login migration errors and warnings per login"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputLoginLevel {
@@ -5150,7 +5523,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputMigrationLevel {
     #[serde(rename = "serverRoleResults", default, skip_serializing_if = "Option::is_none")]
     pub server_role_results: Option<String>,
     #[doc = "List of orphaned users."]
-    #[serde(rename = "orphanedUsersInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orphanedUsersInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub orphaned_users_info: Vec<OrphanedUserInfo>,
     #[doc = "Selected databases as a map from database name to database id"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5168,7 +5546,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputMigrationLevel {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputMigrationLevel {
@@ -5202,7 +5585,11 @@ pub struct MigrateSqlServerSqlMiTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlMiTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlMiTaskOutput>,
 }
 impl MigrateSqlServerSqlMiTaskProperties {
@@ -5227,7 +5614,12 @@ pub struct MigrateSqlServerSqlServerDatabaseInput {
     #[serde(rename = "backupAndRestoreFolder", default, skip_serializing_if = "Option::is_none")]
     pub backup_and_restore_folder: Option<String>,
     #[doc = "The list of database files"]
-    #[serde(rename = "databaseFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_files: Vec<DatabaseFileInput>,
 }
 impl MigrateSqlServerSqlServerDatabaseInput {
@@ -5296,7 +5688,12 @@ pub struct MigrateSsisTaskOutputMigrationLevel {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
     #[doc = "Current stage of SSIS migration"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5345,7 +5742,12 @@ pub struct MigrateSsisTaskOutputProjectLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Migration exceptions and warnings"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSsisTaskOutputProjectLevel {
@@ -5372,7 +5774,11 @@ pub struct MigrateSsisTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSsisTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSsisTaskOutput>,
 }
 impl MigrateSsisTaskProperties {
@@ -5409,7 +5815,11 @@ pub struct MigrateSyncCompleteCommandOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "List of errors that happened during the command execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ReportableException>,
 }
 impl MigrateSyncCompleteCommandOutput {
@@ -5445,7 +5855,12 @@ pub struct MigrationEligibilityInfo {
     #[serde(rename = "isEligibleForMigration", default, skip_serializing_if = "Option::is_none")]
     pub is_eligible_for_migration: Option<bool>,
     #[doc = "Information about eligibility failure for the server object."]
-    #[serde(rename = "validationMessages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationMessages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_messages: Vec<String>,
 }
 impl MigrationEligibilityInfo {
@@ -6574,7 +6989,11 @@ pub struct NonSqlDataMigrationTableResult {
     #[serde(rename = "elapsedTimeInMiliseconds", default, skip_serializing_if = "Option::is_none")]
     pub elapsed_time_in_miliseconds: Option<f64>,
     #[doc = "List of errors, if any, during migration"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<DataMigrationError>,
 }
 impl NonSqlDataMigrationTableResult {
@@ -6709,7 +7128,11 @@ pub struct ODataError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Inner errors that caused this error"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ODataError>,
 }
 impl ODataError {
@@ -6753,7 +7176,12 @@ pub struct OracleOciDriverInfo {
     #[serde(rename = "assemblyVersion", default, skip_serializing_if = "Option::is_none")]
     pub assembly_version: Option<String>,
     #[doc = "List of Oracle database versions supported by this driver. Only major minor of the version is listed."]
-    #[serde(rename = "supportedOracleVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOracleVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_oracle_versions: Vec<String>,
 }
 impl OracleOciDriverInfo {
@@ -6877,7 +7305,11 @@ impl ProjectFileProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProjectList {
     #[doc = "List of projects"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Project>,
     #[doc = "URL to load the next page of projects"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6913,7 +7345,12 @@ pub struct ProjectProperties {
     #[serde(rename = "targetConnectionInfo", default, skip_serializing_if = "Option::is_none")]
     pub target_connection_info: Option<ConnectionInfo>,
     #[doc = "List of DatabaseInfo"]
-    #[serde(rename = "databasesInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databasesInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases_info: Vec<DatabaseInfo>,
     #[doc = "The project's provisioning state"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -7091,13 +7528,21 @@ pub struct ProjectTaskProperties {
     #[serde(rename = "taskType")]
     pub task_type: String,
     #[doc = "Array of errors. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ODataError>,
     #[doc = "The state of the task. This is ignored if submitted."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<project_task_properties::State>,
     #[doc = "Array of command properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub commands: Vec<CommandProperties>,
     #[doc = "Key value pairs of client data to attach meta data information to task"]
     #[serde(rename = "clientData", default, skip_serializing_if = "Option::is_none")]
@@ -7248,7 +7693,11 @@ pub mod quota {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaList {
     #[doc = "List of quotas"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Quota>,
     #[doc = "URL to load the next page of quotas, or null or missing if this is the last page"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7386,19 +7835,40 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<ResourceSkuCapacity>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The api versions that support this SKU."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Metadata for retrieving price info."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<ResourceSkuCosts>,
     #[doc = "A name value pair to describe the capability."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -7509,7 +7979,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason code for restriction."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -7977,7 +8451,11 @@ pub mod service_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceOperationList {
     #[doc = "List of actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceOperation>,
     #[doc = "URL to load the next page of actions"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8022,7 +8500,11 @@ impl ServiceSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSkuList {
     #[doc = "List of service SKUs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableServiceSku>,
     #[doc = "URL to load the next page of service SKUs"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8349,7 +8831,12 @@ pub struct StartMigrationScenarioServerRoleResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<MigrationState>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl StartMigrationScenarioServerRoleResult {
@@ -8521,7 +9008,11 @@ impl Serialize for SyncTableMigrationState {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskList {
     #[doc = "List of tasks"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProjectTask>,
     #[doc = "URL to load the next page of tasks"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8620,7 +9111,12 @@ pub struct UploadOciDriverTaskOutput {
     #[serde(rename = "driverPackageName", default, skip_serializing_if = "Option::is_none")]
     pub driver_package_name: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl UploadOciDriverTaskOutput {
@@ -8637,7 +9133,11 @@ pub struct UploadOciDriverTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<UploadOciDriverTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<UploadOciDriverTaskOutput>,
 }
 impl UploadOciDriverTaskProperties {
@@ -8658,7 +9158,11 @@ pub struct ValidateMigrationInputSqlServerSqlDbSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ValidateSyncMigrationInputSqlServerTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateSyncMigrationInputSqlServerTaskOutput>,
 }
 impl ValidateMigrationInputSqlServerSqlDbSyncTaskProperties {
@@ -8693,7 +9197,12 @@ pub struct ValidateMigrationInputSqlServerSqlMiSyncTaskOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Errors associated with a selected database object"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ValidateMigrationInputSqlServerSqlMiSyncTaskOutput {
@@ -8710,7 +9219,11 @@ pub struct ValidateMigrationInputSqlServerSqlMiSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ValidateMigrationInputSqlServerSqlMiSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateMigrationInputSqlServerSqlMiSyncTaskOutput>,
 }
 impl ValidateMigrationInputSqlServerSqlMiSyncTaskProperties {
@@ -8735,7 +9248,12 @@ pub struct ValidateMigrationInputSqlServerSqlMiTaskInput {
     #[serde(rename = "selectedDatabases")]
     pub selected_databases: Vec<MigrateSqlServerSqlMiDatabaseInput>,
     #[doc = "Logins to migrate"]
-    #[serde(rename = "selectedLogins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedLogins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_logins: Vec<String>,
     #[doc = "File share information with Path, Username, and Password."]
     #[serde(rename = "backupFileShare", default, skip_serializing_if = "Option::is_none")]
@@ -8775,19 +9293,44 @@ pub struct ValidateMigrationInputSqlServerSqlMiTaskOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Errors associated with the RestoreDatabaseName"]
-    #[serde(rename = "restoreDatabaseNameErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreDatabaseNameErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_database_name_errors: Vec<ReportableException>,
     #[doc = "Errors associated with the BackupFolder path"]
-    #[serde(rename = "backupFolderErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupFolderErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_folder_errors: Vec<ReportableException>,
     #[doc = "Errors associated with backup share user name and password credentials"]
-    #[serde(rename = "backupShareCredentialsErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupShareCredentialsErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_share_credentials_errors: Vec<ReportableException>,
     #[doc = "Errors associated with the storage account provided."]
-    #[serde(rename = "backupStorageAccountErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupStorageAccountErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_storage_account_errors: Vec<ReportableException>,
     #[doc = "Errors associated with existing backup files."]
-    #[serde(rename = "existingBackupErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "existingBackupErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub existing_backup_errors: Vec<ReportableException>,
     #[doc = "Information about backup files when existing backup mode is used."]
     #[serde(rename = "databaseBackupInfo", default, skip_serializing_if = "Option::is_none")]
@@ -8807,7 +9350,11 @@ pub struct ValidateMigrationInputSqlServerSqlMiTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ValidateMigrationInputSqlServerSqlMiTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateMigrationInputSqlServerSqlMiTaskOutput>,
 }
 impl ValidateMigrationInputSqlServerSqlMiTaskProperties {
@@ -8828,7 +9375,11 @@ pub struct ValidateMongoDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MongoDbMigrationSettings>,
     #[doc = "An array containing a single MongoDbMigrationProgress object"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MongoDbMigrationProgress>,
 }
 impl ValidateMongoDbTaskProperties {
@@ -8849,7 +9400,11 @@ pub struct ValidateOracleAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateOracleAzureDbPostgreSqlSyncTaskInput>,
     #[doc = "An array containing a single validation error response object"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateOracleAzureDbPostgreSqlSyncTaskOutput>,
 }
 impl ValidateOracleAzureDbForPostgreSqlSyncTaskProperties {
@@ -8865,7 +9420,12 @@ impl ValidateOracleAzureDbForPostgreSqlSyncTaskProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ValidateOracleAzureDbPostgreSqlSyncTaskOutput {
     #[doc = "Errors associated with a selected database object"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ValidateOracleAzureDbPostgreSqlSyncTaskOutput {
@@ -8909,7 +9469,12 @@ pub struct ValidateSyncMigrationInputSqlServerTaskOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Errors associated with a selected database object"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ValidateSyncMigrationInputSqlServerTaskOutput {
diff --git a/services/mgmt/datamigration/src/package_preview_2021_10/models.rs b/services/mgmt/datamigration/src/package_preview_2021_10/models.rs
index 15a21c9010..15617a5b31 100644
--- a/services/mgmt/datamigration/src/package_preview_2021_10/models.rs
+++ b/services/mgmt/datamigration/src/package_preview_2021_10/models.rs
@@ -365,7 +365,12 @@ pub struct BackupSetInfo {
     #[serde(rename = "backupType", default, skip_serializing_if = "Option::is_none")]
     pub backup_type: Option<BackupType>,
     #[doc = "List of files in the backup set"]
-    #[serde(rename = "listOfBackupFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "listOfBackupFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub list_of_backup_files: Vec<BackupFileInfo>,
     #[doc = "Name of the database to which the backup set belongs"]
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
@@ -463,7 +468,12 @@ pub struct CheckOciDriverTaskOutput {
     #[serde(rename = "installedDriver", default, skip_serializing_if = "Option::is_none")]
     pub installed_driver: Option<OracleOciDriverInfo>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl CheckOciDriverTaskOutput {
@@ -480,7 +490,11 @@ pub struct CheckOciDriverTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<CheckOciDriverTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<CheckOciDriverTaskOutput>,
 }
 impl CheckOciDriverTaskProperties {
@@ -499,7 +513,11 @@ pub struct CommandProperties {
     #[serde(rename = "commandType")]
     pub command_type: command_properties::CommandType,
     #[doc = "Array of errors. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ODataError>,
     #[doc = "The state of the command. This is ignored if submitted."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -621,7 +639,11 @@ pub struct ConnectToMongoDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MongoDbConnectionInfo>,
     #[doc = "An array containing a single MongoDbClusterInfo object"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MongoDbClusterInfo>,
 }
 impl ConnectToMongoDbTaskProperties {
@@ -668,7 +690,11 @@ pub struct ConnectToSourceMySqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceMySqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceNonSqlTaskOutput>,
 }
 impl ConnectToSourceMySqlTaskProperties {
@@ -693,10 +719,19 @@ pub struct ConnectToSourceNonSqlTaskOutput {
     #[serde(rename = "serverProperties", default, skip_serializing_if = "Option::is_none")]
     pub server_properties: Option<ServerProperties>,
     #[doc = "List of databases on the server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourceNonSqlTaskOutput {
@@ -723,13 +758,22 @@ pub struct ConnectToSourceOracleSyncTaskOutput {
     #[serde(rename = "sourceServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_version: Option<String>,
     #[doc = "List of schemas on source server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Source server brand version"]
     #[serde(rename = "sourceServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourceOracleSyncTaskOutput {
@@ -746,7 +790,11 @@ pub struct ConnectToSourceOracleSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceOracleSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceOracleSyncTaskOutput>,
 }
 impl ConnectToSourceOracleSyncTaskProperties {
@@ -780,13 +828,22 @@ pub struct ConnectToSourcePostgreSqlSyncTaskOutput {
     #[serde(rename = "sourceServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_version: Option<String>,
     #[doc = "List of databases on source server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Source server brand version"]
     #[serde(rename = "sourceServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourcePostgreSqlSyncTaskOutput {
@@ -803,7 +860,11 @@ pub struct ConnectToSourcePostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourcePostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourcePostgreSqlSyncTaskOutput>,
 }
 impl ConnectToSourcePostgreSqlSyncTaskProperties {
@@ -824,7 +885,11 @@ pub struct ConnectToSourceSqlServerSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceSqlServerTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceSqlServerTaskOutput>,
 }
 impl ConnectToSourceSqlServerSyncTaskProperties {
@@ -910,7 +975,12 @@ pub struct ConnectToSourceSqlServerTaskOutputAgentJobLevel {
     #[serde(rename = "lastExecutedOn", default, with = "azure_core::date::rfc3339::option")]
     pub last_executed_on: Option<time::OffsetDateTime>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
     #[doc = "Information about migration eligibility of a server object"]
     #[serde(rename = "migrationEligibility", default, skip_serializing_if = "Option::is_none")]
@@ -942,7 +1012,12 @@ pub struct ConnectToSourceSqlServerTaskOutputDatabaseLevel {
     #[serde(rename = "sizeMB", default, skip_serializing_if = "Option::is_none")]
     pub size_mb: Option<f64>,
     #[doc = "The list of database files"]
-    #[serde(rename = "databaseFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_files: Vec<DatabaseFileInfo>,
     #[doc = "An enumeration of SQL Server database compatibility levels"]
     #[serde(rename = "compatibilityLevel", default, skip_serializing_if = "Option::is_none")]
@@ -1020,7 +1095,12 @@ pub struct ConnectToSourceSqlServerTaskOutputTaskLevel {
     #[serde(rename = "sourceServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_brand_version: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourceSqlServerTaskOutputTaskLevel {
@@ -1046,7 +1126,11 @@ pub struct ConnectToSourceSqlServerTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceSqlServerTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceSqlServerTaskOutput>,
 }
 impl ConnectToSourceSqlServerTaskProperties {
@@ -1090,13 +1174,22 @@ pub struct ConnectToTargetAzureDbForMySqlTaskOutput {
     #[serde(rename = "serverVersion", default, skip_serializing_if = "Option::is_none")]
     pub server_version: Option<String>,
     #[doc = "List of databases on target server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Target server brand version"]
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetAzureDbForMySqlTaskOutput {
@@ -1113,7 +1206,11 @@ pub struct ConnectToTargetAzureDbForMySqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetAzureDbForMySqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetAzureDbForMySqlTaskOutput>,
 }
 impl ConnectToTargetAzureDbForMySqlTaskProperties {
@@ -1153,13 +1250,22 @@ pub struct ConnectToTargetAzureDbForPostgreSqlSyncTaskOutput {
     #[serde(rename = "targetServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_version: Option<String>,
     #[doc = "List of databases on target server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Target server brand version"]
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetAzureDbForPostgreSqlSyncTaskOutput {
@@ -1176,7 +1282,11 @@ pub struct ConnectToTargetAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetAzureDbForPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetAzureDbForPostgreSqlSyncTaskOutput>,
 }
 impl ConnectToTargetAzureDbForPostgreSqlSyncTaskProperties {
@@ -1207,16 +1317,30 @@ pub struct ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskOutput {
     #[serde(rename = "targetServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_version: Option<String>,
     #[doc = "List of databases on target server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Target server brand version"]
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
     #[doc = "Mapping of schemas per database"]
-    #[serde(rename = "databaseSchemaMap", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseSchemaMap",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_schema_map: Vec<serde_json::Value>,
 }
 impl ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskOutput {
@@ -1233,7 +1357,11 @@ pub struct ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskOutput>,
 }
 impl ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskProperties {
@@ -1287,7 +1415,11 @@ pub struct ConnectToTargetSqlDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlDbTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlDbTaskOutput>,
 }
 impl ConnectToTargetSqlDbTaskProperties {
@@ -1327,7 +1459,12 @@ pub struct ConnectToTargetSqlMiSyncTaskOutput {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetSqlMiSyncTaskOutput {
@@ -1344,7 +1481,11 @@ pub struct ConnectToTargetSqlMiSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlMiSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlMiSyncTaskOutput>,
 }
 impl ConnectToTargetSqlMiSyncTaskProperties {
@@ -1395,13 +1536,27 @@ pub struct ConnectToTargetSqlMiTaskOutput {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "List of logins on the target server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logins: Vec<String>,
     #[doc = "List of agent jobs on the target server."]
-    #[serde(rename = "agentJobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentJobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_jobs: Vec<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetSqlMiTaskOutput {
@@ -1418,7 +1573,11 @@ pub struct ConnectToTargetSqlMiTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlMiTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlMiTaskOutput>,
 }
 impl ConnectToTargetSqlMiTaskProperties {
@@ -1457,7 +1616,11 @@ pub struct ConnectToTargetSqlSqlDbSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlSqlDbSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlDbTaskOutput>,
 }
 impl ConnectToTargetSqlSqlDbSyncTaskProperties {
@@ -1582,7 +1745,12 @@ pub struct DataMigrationProjectMetadata {
     #[serde(rename = "targetUsingWinAuth", default, skip_serializing_if = "Option::is_none")]
     pub target_using_win_auth: Option<bool>,
     #[doc = "List of tables selected for migration"]
-    #[serde(rename = "selectedMigrationTables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedMigrationTables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_migration_tables: Vec<MigrationTableMetadata>,
 }
 impl DataMigrationProjectMetadata {
@@ -1619,7 +1787,11 @@ impl DataMigrationService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataMigrationServiceList {
     #[doc = "List of services"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataMigrationService>,
     #[doc = "URL to load the next page of services"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1732,7 +1904,12 @@ pub struct DataMigrationServiceStatusResponse {
     #[serde(rename = "vmSize", default, skip_serializing_if = "Option::is_none")]
     pub vm_size: Option<String>,
     #[doc = "The list of supported task types"]
-    #[serde(rename = "supportedTaskTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTaskTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_task_types: Vec<String>,
 }
 impl DataMigrationServiceStatusResponse {
@@ -1810,7 +1987,12 @@ pub struct DatabaseBackupInfo {
     #[serde(rename = "backupType", default, skip_serializing_if = "Option::is_none")]
     pub backup_type: Option<BackupType>,
     #[doc = "The list of backup files for the current database."]
-    #[serde(rename = "backupFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_files: Vec<String>,
     #[doc = "Position of current database backup in the file."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2008,7 +2190,11 @@ impl DatabaseMigration {
 #[doc = "A list of Database Migrations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseMigrationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseMigration>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -2538,7 +2724,12 @@ pub struct ExecutionStatistics {
     #[serde(rename = "hasErrors", default, skip_serializing_if = "Option::is_none")]
     pub has_errors: Option<bool>,
     #[doc = "List of sql Errors"]
-    #[serde(rename = "sqlErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sqlErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sql_errors: Vec<String>,
 }
 impl ExecutionStatistics {
@@ -2550,7 +2741,11 @@ impl ExecutionStatistics {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileList {
     #[doc = "List of files"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProjectFile>,
     #[doc = "URL to load the next page of files"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2653,7 +2848,12 @@ pub struct GetTdeCertificatesSqlTaskOutput {
     #[serde(rename = "base64EncodedCertificates", default, skip_serializing_if = "Option::is_none")]
     pub base64_encoded_certificates: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetTdeCertificatesSqlTaskOutput {
@@ -2670,7 +2870,11 @@ pub struct GetTdeCertificatesSqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetTdeCertificatesSqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetTdeCertificatesSqlTaskOutput>,
 }
 impl GetTdeCertificatesSqlTaskProperties {
@@ -2710,7 +2914,12 @@ pub struct GetUserTablesMySqlTaskOutput {
     #[serde(rename = "databasesToTables", default, skip_serializing_if = "Option::is_none")]
     pub databases_to_tables: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesMySqlTaskOutput {
@@ -2727,7 +2936,11 @@ pub struct GetUserTablesMySqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesMySqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesMySqlTaskOutput>,
 }
 impl GetUserTablesMySqlTaskProperties {
@@ -2764,10 +2977,19 @@ pub struct GetUserTablesOracleTaskOutput {
     #[serde(rename = "schemaName", default, skip_serializing_if = "Option::is_none")]
     pub schema_name: Option<String>,
     #[doc = "List of valid tables found for this schema"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<DatabaseTable>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesOracleTaskOutput {
@@ -2784,7 +3006,11 @@ pub struct GetUserTablesOracleTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesOracleTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesOracleTaskOutput>,
 }
 impl GetUserTablesOracleTaskProperties {
@@ -2821,10 +3047,19 @@ pub struct GetUserTablesPostgreSqlTaskOutput {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "List of valid tables found for this database"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<DatabaseTable>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesPostgreSqlTaskOutput {
@@ -2841,7 +3076,11 @@ pub struct GetUserTablesPostgreSqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesPostgreSqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesPostgreSqlTaskOutput>,
 }
 impl GetUserTablesPostgreSqlTaskProperties {
@@ -2897,7 +3136,12 @@ pub struct GetUserTablesSqlSyncTaskOutput {
     #[serde(rename = "tableValidationErrors", default, skip_serializing_if = "Option::is_none")]
     pub table_validation_errors: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesSqlSyncTaskOutput {
@@ -2914,7 +3158,11 @@ pub struct GetUserTablesSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesSqlSyncTaskOutput>,
 }
 impl GetUserTablesSqlSyncTaskProperties {
@@ -2954,7 +3202,12 @@ pub struct GetUserTablesSqlTaskOutput {
     #[serde(rename = "databasesToTables", default, skip_serializing_if = "Option::is_none")]
     pub databases_to_tables: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesSqlTaskOutput {
@@ -2971,7 +3224,11 @@ pub struct GetUserTablesSqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesSqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesSqlTaskOutput>,
 }
 impl GetUserTablesSqlTaskProperties {
@@ -2999,7 +3256,12 @@ impl InstallOciDriverTaskInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstallOciDriverTaskOutput {
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl InstallOciDriverTaskOutput {
@@ -3016,7 +3278,11 @@ pub struct InstallOciDriverTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<InstallOciDriverTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<InstallOciDriverTaskOutput>,
 }
 impl InstallOciDriverTaskProperties {
@@ -3035,7 +3301,11 @@ pub struct IntegrationRuntimeMonitoringData {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Integration Runtime node monitoring data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<NodeMonitoringData>,
 }
 impl IntegrationRuntimeMonitoringData {
@@ -3178,7 +3448,11 @@ impl MigrateMiSyncCompleteCommandInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrateMiSyncCompleteCommandOutput {
     #[doc = "List of errors that happened during the command execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ReportableException>,
 }
 impl MigrateMiSyncCompleteCommandOutput {
@@ -3215,7 +3489,11 @@ pub struct MigrateMongoDbTaskProperties {
     #[doc = "Describes how a MongoDB data migration should be performed"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MongoDbMigrationSettings>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MongoDbProgress>,
 }
 impl MigrateMongoDbTaskProperties {
@@ -3307,7 +3585,11 @@ pub struct MigrateMySqlAzureDbForMySqlOfflineTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateMySqlAzureDbForMySqlOfflineTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateMySqlAzureDbForMySqlOfflineTaskOutput>,
 }
 impl MigrateMySqlAzureDbForMySqlOfflineTaskProperties {
@@ -3395,7 +3677,11 @@ pub struct MigrateMySqlAzureDbForMySqlSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigrateMySqlAzureDbForMySqlSyncTaskOutputDatabaseError {
@@ -3604,7 +3890,11 @@ pub struct MigrateMySqlAzureDbForMySqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateMySqlAzureDbForMySqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateMySqlAzureDbForMySqlSyncTaskOutput>,
 }
 impl MigrateMySqlAzureDbForMySqlSyncTaskProperties {
@@ -3625,7 +3915,11 @@ pub struct MigrateOracleAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateOracleAzureDbPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateOracleAzureDbPostgreSqlSyncTaskOutput>,
 }
 impl MigrateOracleAzureDbForPostgreSqlSyncTaskProperties {
@@ -3719,7 +4013,11 @@ pub struct MigrateOracleAzureDbPostgreSqlSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigrateOracleAzureDbPostgreSqlSyncTaskOutputDatabaseError {
@@ -3938,7 +4236,12 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncDatabaseInput {
     #[serde(rename = "targetSetting", default, skip_serializing_if = "Option::is_none")]
     pub target_setting: Option<serde_json::Value>,
     #[doc = "Tables selected for migration"]
-    #[serde(rename = "selectedTables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedTables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_tables: Vec<MigratePostgreSqlAzureDbForPostgreSqlSyncDatabaseTableInput>,
 }
 impl MigratePostgreSqlAzureDbForPostgreSqlSyncDatabaseInput {
@@ -4011,7 +4314,11 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutputDatabaseError {
@@ -4103,7 +4410,11 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutputError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub error: Option<ReportableException>,
     #[doc = "List of error events"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutputError {
@@ -4240,7 +4551,11 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigratePostgreSqlAzureDbForPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutput>,
     #[doc = "task id"]
     #[serde(rename = "taskId", default, skip_serializing_if = "Option::is_none")]
@@ -4442,7 +4757,11 @@ pub struct MigrateSchemaSqlServerSqlDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSchemaSqlServerSqlDbTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSchemaSqlServerSqlDbTaskOutput>,
     #[doc = "DateTime in UTC when the task was created"]
     #[serde(rename = "createdOn", default, skip_serializing_if = "Option::is_none")]
@@ -4582,7 +4901,11 @@ pub struct MigrateSqlServerSqlDbSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigrateSqlServerSqlDbSyncTaskOutputDatabaseError {
@@ -4795,7 +5118,11 @@ pub struct MigrateSqlServerSqlDbSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlDbSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlDbSyncTaskOutput>,
 }
 impl MigrateSqlServerSqlDbSyncTaskProperties {
@@ -4892,7 +5219,12 @@ pub struct MigrateSqlServerSqlDbTaskOutputDatabaseLevel {
     #[serde(rename = "resultPrefix", default, skip_serializing_if = "Option::is_none")]
     pub result_prefix: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
     #[doc = "Summary of object results in the migration"]
     #[serde(rename = "objectSummary", default, skip_serializing_if = "Option::is_none")]
@@ -5001,7 +5333,12 @@ pub struct MigrateSqlServerSqlDbTaskOutputMigrationLevel {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlDbTaskOutputMigrationLevel {
@@ -5098,7 +5435,11 @@ pub struct MigrateSqlServerSqlDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlDbTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlDbTaskOutput>,
     #[doc = "task id"]
     #[serde(rename = "taskId", default, skip_serializing_if = "Option::is_none")]
@@ -5130,7 +5471,12 @@ pub struct MigrateSqlServerSqlMiDatabaseInput {
     #[serde(rename = "backupFileShare", default, skip_serializing_if = "Option::is_none")]
     pub backup_file_share: Option<FileShare>,
     #[doc = "The list of backup files to be used in case of existing backups."]
-    #[serde(rename = "backupFilePaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupFilePaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_file_paths: Vec<String>,
     #[doc = "id of the database"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5198,7 +5544,12 @@ pub struct MigrateSqlServerSqlMiSyncTaskOutputDatabaseLevel {
     #[serde(rename = "lastRestoredBackupSetInfo", default, skip_serializing_if = "Option::is_none")]
     pub last_restored_backup_set_info: Option<BackupSetInfo>,
     #[doc = "Backup sets that are currently active (Either being uploaded or getting restored)"]
-    #[serde(rename = "activeBackupSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeBackupSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_backup_sets: Vec<BackupSetInfo>,
     #[doc = "Name of container created in the Azure Storage account where backups are copied to"]
     #[serde(rename = "containerName", default, skip_serializing_if = "Option::is_none")]
@@ -5210,7 +5561,12 @@ pub struct MigrateSqlServerSqlMiSyncTaskOutputDatabaseLevel {
     #[serde(rename = "isFullBackupRestored", default, skip_serializing_if = "Option::is_none")]
     pub is_full_backup_restored: Option<bool>,
     #[doc = "Migration exceptions and warnings"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiSyncTaskOutputDatabaseLevel {
@@ -5316,7 +5672,11 @@ pub struct MigrateSqlServerSqlMiSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlMiSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlMiSyncTaskOutput>,
 }
 impl MigrateSqlServerSqlMiSyncTaskProperties {
@@ -5340,10 +5700,20 @@ pub struct MigrateSqlServerSqlMiTaskInput {
     #[serde(rename = "startedOn", default, skip_serializing_if = "Option::is_none")]
     pub started_on: Option<String>,
     #[doc = "Logins to migrate."]
-    #[serde(rename = "selectedLogins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedLogins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_logins: Vec<String>,
     #[doc = "Agent Jobs to migrate."]
-    #[serde(rename = "selectedAgentJobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedAgentJobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_agent_jobs: Vec<String>,
     #[doc = "File share information with Path, Username, and Password."]
     #[serde(rename = "backupFileShare", default, skip_serializing_if = "Option::is_none")]
@@ -5415,7 +5785,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputAgentJobLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Migration errors and warnings per job"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputAgentJobLevel {
@@ -5458,7 +5833,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputDatabaseLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Migration exceptions and warnings"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputDatabaseLevel {
@@ -5519,7 +5899,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputLoginLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Login migration errors and warnings per login"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputLoginLevel {
@@ -5565,7 +5950,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputMigrationLevel {
     #[serde(rename = "serverRoleResults", default, skip_serializing_if = "Option::is_none")]
     pub server_role_results: Option<String>,
     #[doc = "List of orphaned users."]
-    #[serde(rename = "orphanedUsersInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orphanedUsersInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub orphaned_users_info: Vec<OrphanedUserInfo>,
     #[doc = "Selected databases as a map from database name to database id"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5583,7 +5973,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputMigrationLevel {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputMigrationLevel {
@@ -5617,7 +6012,11 @@ pub struct MigrateSqlServerSqlMiTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlMiTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlMiTaskOutput>,
     #[doc = "task id"]
     #[serde(rename = "taskId", default, skip_serializing_if = "Option::is_none")]
@@ -5646,7 +6045,12 @@ pub struct MigrateSqlServerSqlServerDatabaseInput {
     #[serde(rename = "backupAndRestoreFolder", default, skip_serializing_if = "Option::is_none")]
     pub backup_and_restore_folder: Option<String>,
     #[doc = "The list of database files"]
-    #[serde(rename = "databaseFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_files: Vec<DatabaseFileInput>,
 }
 impl MigrateSqlServerSqlServerDatabaseInput {
@@ -5715,7 +6119,12 @@ pub struct MigrateSsisTaskOutputMigrationLevel {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
     #[doc = "Current stage of SSIS migration"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5764,7 +6173,12 @@ pub struct MigrateSsisTaskOutputProjectLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Migration exceptions and warnings"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSsisTaskOutputProjectLevel {
@@ -5791,7 +6205,11 @@ pub struct MigrateSsisTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSsisTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSsisTaskOutput>,
 }
 impl MigrateSsisTaskProperties {
@@ -5828,7 +6246,11 @@ pub struct MigrateSyncCompleteCommandOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "List of errors that happened during the command execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ReportableException>,
 }
 impl MigrateSyncCompleteCommandOutput {
@@ -5864,7 +6286,12 @@ pub struct MigrationEligibilityInfo {
     #[serde(rename = "isEligibleForMigration", default, skip_serializing_if = "Option::is_none")]
     pub is_eligible_for_migration: Option<bool>,
     #[doc = "Information about eligibility failure for the server object."]
-    #[serde(rename = "validationMessages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationMessages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_messages: Vec<String>,
 }
 impl MigrationEligibilityInfo {
@@ -6012,10 +6439,20 @@ pub struct MigrationStatusDetails {
     #[serde(rename = "lastRestoredBackupSetInfo", default, skip_serializing_if = "Option::is_none")]
     pub last_restored_backup_set_info: Option<SqlBackupSetInfo>,
     #[doc = "Backup sets that are currently active."]
-    #[serde(rename = "activeBackupSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeBackupSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_backup_sets: Vec<SqlBackupSetInfo>,
     #[doc = "Files that are not valid backup files."]
-    #[serde(rename = "invalidFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "invalidFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub invalid_files: Vec<String>,
     #[doc = "Name of blob container."]
     #[serde(rename = "blobContainerName", default, skip_serializing_if = "Option::is_none")]
@@ -6030,7 +6467,12 @@ pub struct MigrationStatusDetails {
     #[serde(rename = "completeRestoreErrorMessage", default, skip_serializing_if = "Option::is_none")]
     pub complete_restore_error_message: Option<String>,
     #[doc = "File upload blocking errors, if any."]
-    #[serde(rename = "fileUploadBlockingErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fileUploadBlockingErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_upload_blocking_errors: Vec<String>,
     #[doc = "File name that is currently being restored."]
     #[serde(rename = "currentRestoringFilename", default, skip_serializing_if = "Option::is_none")]
@@ -7115,7 +7557,11 @@ pub struct NonSqlDataMigrationTableResult {
     #[serde(rename = "elapsedTimeInMiliseconds", default, skip_serializing_if = "Option::is_none")]
     pub elapsed_time_in_miliseconds: Option<f64>,
     #[doc = "List of errors, if any, during migration"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<DataMigrationError>,
 }
 impl NonSqlDataMigrationTableResult {
@@ -7250,7 +7696,11 @@ pub struct ODataError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Inner errors that caused this error"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ODataError>,
 }
 impl ODataError {
@@ -7276,7 +7726,11 @@ impl OfflineConfiguration {
 #[doc = "Result of the request to list SQL operations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDefinition>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -7404,7 +7858,12 @@ pub struct OracleOciDriverInfo {
     #[serde(rename = "assemblyVersion", default, skip_serializing_if = "Option::is_none")]
     pub assembly_version: Option<String>,
     #[doc = "List of Oracle database versions supported by this driver. Only major minor of the version is listed."]
-    #[serde(rename = "supportedOracleVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOracleVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_oracle_versions: Vec<String>,
 }
 impl OracleOciDriverInfo {
@@ -7533,7 +7992,11 @@ impl ProjectFileProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProjectList {
     #[doc = "List of projects"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Project>,
     #[doc = "URL to load the next page of projects"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7572,7 +8035,12 @@ pub struct ProjectProperties {
     #[serde(rename = "targetConnectionInfo", default, skip_serializing_if = "Option::is_none")]
     pub target_connection_info: Option<ConnectionInfo>,
     #[doc = "List of DatabaseInfo"]
-    #[serde(rename = "databasesInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databasesInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases_info: Vec<DatabaseInfo>,
     #[doc = "The project's provisioning state"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -7750,13 +8218,21 @@ pub struct ProjectTaskProperties {
     #[serde(rename = "taskType")]
     pub task_type: project_task_properties::TaskType,
     #[doc = "Array of errors. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ODataError>,
     #[doc = "The state of the task. This is ignored if submitted."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<project_task_properties::State>,
     #[doc = "Array of command properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub commands: Vec<CommandProperties>,
     #[doc = "Key value pairs of client data to attach meta data information to task"]
     #[serde(rename = "clientData", default, skip_serializing_if = "Option::is_none")]
@@ -8094,7 +8570,11 @@ pub mod quota {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaList {
     #[doc = "List of quotas"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Quota>,
     #[doc = "URL to load the next page of quotas, or null or missing if this is the last page"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8250,19 +8730,40 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<ResourceSkuCapacity>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The api versions that support this SKU."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Metadata for retrieving price info."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<ResourceSkuCosts>,
     #[doc = "A name value pair to describe the capability."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -8373,7 +8874,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason code for restriction."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -8844,7 +9349,11 @@ pub mod service_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceOperationList {
     #[doc = "List of actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceOperation>,
     #[doc = "URL to load the next page of actions"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8883,7 +9392,11 @@ impl ServiceSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSkuList {
     #[doc = "List of service SKUs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableServiceSku>,
     #[doc = "URL to load the next page of service SKUs"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9003,7 +9516,12 @@ pub struct SqlBackupSetInfo {
     #[serde(rename = "backupType", default, skip_serializing_if = "Option::is_none")]
     pub backup_type: Option<String>,
     #[doc = "List of files in the backup set."]
-    #[serde(rename = "listOfBackupFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "listOfBackupFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub list_of_backup_files: Vec<SqlBackupFileInfo>,
     #[doc = "Backup start date."]
     #[serde(rename = "backupStartDate", default, with = "azure_core::date::rfc3339::option")]
@@ -9021,7 +9539,12 @@ pub struct SqlBackupSetInfo {
     #[serde(rename = "familyCount", default, skip_serializing_if = "Option::is_none")]
     pub family_count: Option<i32>,
     #[doc = "The reasons why the backup set is ignored"]
-    #[serde(rename = "ignoreReasons", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ignoreReasons",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ignore_reasons: Vec<String>,
 }
 impl SqlBackupSetInfo {
@@ -9126,7 +9649,11 @@ impl SqlFileShare {
 #[doc = "A list of SQL Migration Service."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlMigrationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlMigrationService>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -9418,7 +9945,12 @@ pub struct StartMigrationScenarioServerRoleResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<MigrationState>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl StartMigrationScenarioServerRoleResult {
@@ -9708,7 +10240,11 @@ impl TargetLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskList {
     #[doc = "List of tasks"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProjectTask>,
     #[doc = "URL to load the next page of tasks"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9803,7 +10339,12 @@ pub struct UploadOciDriverTaskOutput {
     #[serde(rename = "driverPackageName", default, skip_serializing_if = "Option::is_none")]
     pub driver_package_name: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl UploadOciDriverTaskOutput {
@@ -9820,7 +10361,11 @@ pub struct UploadOciDriverTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<UploadOciDriverTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<UploadOciDriverTaskOutput>,
 }
 impl UploadOciDriverTaskProperties {
@@ -9841,7 +10386,11 @@ pub struct ValidateMigrationInputSqlServerSqlDbSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ValidateSyncMigrationInputSqlServerTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateSyncMigrationInputSqlServerTaskOutput>,
 }
 impl ValidateMigrationInputSqlServerSqlDbSyncTaskProperties {
@@ -9876,7 +10425,12 @@ pub struct ValidateMigrationInputSqlServerSqlMiSyncTaskOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Errors associated with a selected database object"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ValidateMigrationInputSqlServerSqlMiSyncTaskOutput {
@@ -9893,7 +10447,11 @@ pub struct ValidateMigrationInputSqlServerSqlMiSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ValidateMigrationInputSqlServerSqlMiSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateMigrationInputSqlServerSqlMiSyncTaskOutput>,
 }
 impl ValidateMigrationInputSqlServerSqlMiSyncTaskProperties {
@@ -9918,7 +10476,12 @@ pub struct ValidateMigrationInputSqlServerSqlMiTaskInput {
     #[serde(rename = "selectedDatabases")]
     pub selected_databases: Vec<MigrateSqlServerSqlMiDatabaseInput>,
     #[doc = "Logins to migrate"]
-    #[serde(rename = "selectedLogins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedLogins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_logins: Vec<String>,
     #[doc = "File share information with Path, Username, and Password."]
     #[serde(rename = "backupFileShare", default, skip_serializing_if = "Option::is_none")]
@@ -9958,19 +10521,44 @@ pub struct ValidateMigrationInputSqlServerSqlMiTaskOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Errors associated with the RestoreDatabaseName"]
-    #[serde(rename = "restoreDatabaseNameErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreDatabaseNameErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_database_name_errors: Vec<ReportableException>,
     #[doc = "Errors associated with the BackupFolder path"]
-    #[serde(rename = "backupFolderErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupFolderErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_folder_errors: Vec<ReportableException>,
     #[doc = "Errors associated with backup share user name and password credentials"]
-    #[serde(rename = "backupShareCredentialsErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupShareCredentialsErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_share_credentials_errors: Vec<ReportableException>,
     #[doc = "Errors associated with the storage account provided."]
-    #[serde(rename = "backupStorageAccountErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupStorageAccountErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_storage_account_errors: Vec<ReportableException>,
     #[doc = "Errors associated with existing backup files."]
-    #[serde(rename = "existingBackupErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "existingBackupErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub existing_backup_errors: Vec<ReportableException>,
     #[doc = "Information about backup files when existing backup mode is used."]
     #[serde(rename = "databaseBackupInfo", default, skip_serializing_if = "Option::is_none")]
@@ -9990,7 +10578,11 @@ pub struct ValidateMigrationInputSqlServerSqlMiTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ValidateMigrationInputSqlServerSqlMiTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateMigrationInputSqlServerSqlMiTaskOutput>,
 }
 impl ValidateMigrationInputSqlServerSqlMiTaskProperties {
@@ -10011,7 +10603,11 @@ pub struct ValidateMongoDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MongoDbMigrationSettings>,
     #[doc = "An array containing a single MongoDbMigrationProgress object"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MongoDbMigrationProgress>,
 }
 impl ValidateMongoDbTaskProperties {
@@ -10032,7 +10628,11 @@ pub struct ValidateOracleAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateOracleAzureDbPostgreSqlSyncTaskInput>,
     #[doc = "An array containing a single validation error response object"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateOracleAzureDbPostgreSqlSyncTaskOutput>,
 }
 impl ValidateOracleAzureDbForPostgreSqlSyncTaskProperties {
@@ -10048,7 +10648,12 @@ impl ValidateOracleAzureDbForPostgreSqlSyncTaskProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ValidateOracleAzureDbPostgreSqlSyncTaskOutput {
     #[doc = "Errors associated with a selected database object"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ValidateOracleAzureDbPostgreSqlSyncTaskOutput {
@@ -10092,7 +10697,12 @@ pub struct ValidateSyncMigrationInputSqlServerTaskOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Errors associated with a selected database object"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ValidateSyncMigrationInputSqlServerTaskOutput {
diff --git a/services/mgmt/datamigration/src/package_preview_2022_01/models.rs b/services/mgmt/datamigration/src/package_preview_2022_01/models.rs
index 8064d39744..09eebbfcc7 100644
--- a/services/mgmt/datamigration/src/package_preview_2022_01/models.rs
+++ b/services/mgmt/datamigration/src/package_preview_2022_01/models.rs
@@ -369,7 +369,12 @@ pub struct BackupSetInfo {
     #[serde(rename = "backupType", default, skip_serializing_if = "Option::is_none")]
     pub backup_type: Option<BackupType>,
     #[doc = "List of files in the backup set"]
-    #[serde(rename = "listOfBackupFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "listOfBackupFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub list_of_backup_files: Vec<BackupFileInfo>,
     #[doc = "Name of the database to which the backup set belongs"]
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
@@ -467,7 +472,12 @@ pub struct CheckOciDriverTaskOutput {
     #[serde(rename = "installedDriver", default, skip_serializing_if = "Option::is_none")]
     pub installed_driver: Option<OracleOciDriverInfo>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl CheckOciDriverTaskOutput {
@@ -484,7 +494,11 @@ pub struct CheckOciDriverTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<CheckOciDriverTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<CheckOciDriverTaskOutput>,
 }
 impl CheckOciDriverTaskProperties {
@@ -503,7 +517,11 @@ pub struct CommandProperties {
     #[serde(rename = "commandType")]
     pub command_type: command_properties::CommandType,
     #[doc = "Array of errors. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ODataError>,
     #[doc = "The state of the command. This is ignored if submitted."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -625,7 +643,11 @@ pub struct ConnectToMongoDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MongoDbConnectionInfo>,
     #[doc = "An array containing a single MongoDbClusterInfo object"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MongoDbClusterInfo>,
 }
 impl ConnectToMongoDbTaskProperties {
@@ -672,7 +694,11 @@ pub struct ConnectToSourceMySqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceMySqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceNonSqlTaskOutput>,
 }
 impl ConnectToSourceMySqlTaskProperties {
@@ -697,10 +723,19 @@ pub struct ConnectToSourceNonSqlTaskOutput {
     #[serde(rename = "serverProperties", default, skip_serializing_if = "Option::is_none")]
     pub server_properties: Option<ServerProperties>,
     #[doc = "List of databases on the server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourceNonSqlTaskOutput {
@@ -727,13 +762,22 @@ pub struct ConnectToSourceOracleSyncTaskOutput {
     #[serde(rename = "sourceServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_version: Option<String>,
     #[doc = "List of schemas on source server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Source server brand version"]
     #[serde(rename = "sourceServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourceOracleSyncTaskOutput {
@@ -750,7 +794,11 @@ pub struct ConnectToSourceOracleSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceOracleSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceOracleSyncTaskOutput>,
 }
 impl ConnectToSourceOracleSyncTaskProperties {
@@ -784,13 +832,22 @@ pub struct ConnectToSourcePostgreSqlSyncTaskOutput {
     #[serde(rename = "sourceServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_version: Option<String>,
     #[doc = "List of databases on source server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Source server brand version"]
     #[serde(rename = "sourceServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourcePostgreSqlSyncTaskOutput {
@@ -807,7 +864,11 @@ pub struct ConnectToSourcePostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourcePostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourcePostgreSqlSyncTaskOutput>,
 }
 impl ConnectToSourcePostgreSqlSyncTaskProperties {
@@ -828,7 +889,11 @@ pub struct ConnectToSourceSqlServerSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceSqlServerTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceSqlServerTaskOutput>,
 }
 impl ConnectToSourceSqlServerSyncTaskProperties {
@@ -918,7 +983,12 @@ pub struct ConnectToSourceSqlServerTaskOutputAgentJobLevel {
     #[serde(rename = "lastExecutedOn", default, with = "azure_core::date::rfc3339::option")]
     pub last_executed_on: Option<time::OffsetDateTime>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
     #[doc = "Information about migration eligibility of a server object"]
     #[serde(rename = "migrationEligibility", default, skip_serializing_if = "Option::is_none")]
@@ -950,7 +1020,12 @@ pub struct ConnectToSourceSqlServerTaskOutputDatabaseLevel {
     #[serde(rename = "sizeMB", default, skip_serializing_if = "Option::is_none")]
     pub size_mb: Option<f64>,
     #[doc = "The list of database files"]
-    #[serde(rename = "databaseFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_files: Vec<DatabaseFileInfo>,
     #[doc = "An enumeration of SQL Server database compatibility levels"]
     #[serde(rename = "compatibilityLevel", default, skip_serializing_if = "Option::is_none")]
@@ -1028,7 +1103,12 @@ pub struct ConnectToSourceSqlServerTaskOutputTaskLevel {
     #[serde(rename = "sourceServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_brand_version: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourceSqlServerTaskOutputTaskLevel {
@@ -1054,7 +1134,11 @@ pub struct ConnectToSourceSqlServerTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceSqlServerTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceSqlServerTaskOutput>,
     #[doc = "Task id "]
     #[serde(rename = "taskId", default, skip_serializing_if = "Option::is_none")]
@@ -1102,13 +1186,22 @@ pub struct ConnectToTargetAzureDbForMySqlTaskOutput {
     #[serde(rename = "serverVersion", default, skip_serializing_if = "Option::is_none")]
     pub server_version: Option<String>,
     #[doc = "List of databases on target server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Target server brand version"]
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetAzureDbForMySqlTaskOutput {
@@ -1125,7 +1218,11 @@ pub struct ConnectToTargetAzureDbForMySqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetAzureDbForMySqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetAzureDbForMySqlTaskOutput>,
 }
 impl ConnectToTargetAzureDbForMySqlTaskProperties {
@@ -1165,13 +1262,22 @@ pub struct ConnectToTargetAzureDbForPostgreSqlSyncTaskOutput {
     #[serde(rename = "targetServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_version: Option<String>,
     #[doc = "List of databases on target server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Target server brand version"]
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetAzureDbForPostgreSqlSyncTaskOutput {
@@ -1188,7 +1294,11 @@ pub struct ConnectToTargetAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetAzureDbForPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetAzureDbForPostgreSqlSyncTaskOutput>,
 }
 impl ConnectToTargetAzureDbForPostgreSqlSyncTaskProperties {
@@ -1219,16 +1329,30 @@ pub struct ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskOutput {
     #[serde(rename = "targetServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_version: Option<String>,
     #[doc = "List of databases on target server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Target server brand version"]
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
     #[doc = "Mapping of schemas per database"]
-    #[serde(rename = "databaseSchemaMap", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseSchemaMap",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_schema_map: Vec<serde_json::Value>,
 }
 impl ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskOutput {
@@ -1245,7 +1369,11 @@ pub struct ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskOutput>,
 }
 impl ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskProperties {
@@ -1305,7 +1433,11 @@ pub struct ConnectToTargetSqlDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlDbTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlDbTaskOutput>,
     #[doc = "DateTime in UTC when the task was created"]
     #[serde(rename = "createdOn", default, skip_serializing_if = "Option::is_none")]
@@ -1349,7 +1481,12 @@ pub struct ConnectToTargetSqlMiSyncTaskOutput {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetSqlMiSyncTaskOutput {
@@ -1366,7 +1503,11 @@ pub struct ConnectToTargetSqlMiSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlMiSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlMiSyncTaskOutput>,
 }
 impl ConnectToTargetSqlMiSyncTaskProperties {
@@ -1417,13 +1558,27 @@ pub struct ConnectToTargetSqlMiTaskOutput {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "List of logins on the target server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logins: Vec<String>,
     #[doc = "List of agent jobs on the target server."]
-    #[serde(rename = "agentJobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentJobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_jobs: Vec<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetSqlMiTaskOutput {
@@ -1440,7 +1595,11 @@ pub struct ConnectToTargetSqlMiTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlMiTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlMiTaskOutput>,
 }
 impl ConnectToTargetSqlMiTaskProperties {
@@ -1479,7 +1638,11 @@ pub struct ConnectToTargetSqlSqlDbSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlSqlDbSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlDbTaskOutput>,
 }
 impl ConnectToTargetSqlSqlDbSyncTaskProperties {
@@ -1604,7 +1767,12 @@ pub struct DataMigrationProjectMetadata {
     #[serde(rename = "targetUsingWinAuth", default, skip_serializing_if = "Option::is_none")]
     pub target_using_win_auth: Option<bool>,
     #[doc = "List of tables selected for migration"]
-    #[serde(rename = "selectedMigrationTables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedMigrationTables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_migration_tables: Vec<MigrationTableMetadata>,
 }
 impl DataMigrationProjectMetadata {
@@ -1641,7 +1809,11 @@ impl DataMigrationService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataMigrationServiceList {
     #[doc = "List of services"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataMigrationService>,
     #[doc = "URL to load the next page of services"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1757,7 +1929,12 @@ pub struct DataMigrationServiceStatusResponse {
     #[serde(rename = "vmSize", default, skip_serializing_if = "Option::is_none")]
     pub vm_size: Option<String>,
     #[doc = "The list of supported task types"]
-    #[serde(rename = "supportedTaskTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTaskTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_task_types: Vec<String>,
 }
 impl DataMigrationServiceStatusResponse {
@@ -1835,7 +2012,12 @@ pub struct DatabaseBackupInfo {
     #[serde(rename = "backupType", default, skip_serializing_if = "Option::is_none")]
     pub backup_type: Option<BackupType>,
     #[doc = "The list of backup files for the current database."]
-    #[serde(rename = "backupFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_files: Vec<String>,
     #[doc = "Position of current database backup in the file."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2033,7 +2215,11 @@ impl DatabaseMigration {
 #[doc = "A list of Database Migrations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseMigrationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseMigration>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -2563,7 +2749,12 @@ pub struct ExecutionStatistics {
     #[serde(rename = "hasErrors", default, skip_serializing_if = "Option::is_none")]
     pub has_errors: Option<bool>,
     #[doc = "List of sql Errors"]
-    #[serde(rename = "sqlErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sqlErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sql_errors: Vec<String>,
 }
 impl ExecutionStatistics {
@@ -2575,7 +2766,11 @@ impl ExecutionStatistics {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileList {
     #[doc = "List of files"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProjectFile>,
     #[doc = "URL to load the next page of files"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2678,7 +2873,12 @@ pub struct GetTdeCertificatesSqlTaskOutput {
     #[serde(rename = "base64EncodedCertificates", default, skip_serializing_if = "Option::is_none")]
     pub base64_encoded_certificates: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetTdeCertificatesSqlTaskOutput {
@@ -2695,7 +2895,11 @@ pub struct GetTdeCertificatesSqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetTdeCertificatesSqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetTdeCertificatesSqlTaskOutput>,
 }
 impl GetTdeCertificatesSqlTaskProperties {
@@ -2735,7 +2939,12 @@ pub struct GetUserTablesMySqlTaskOutput {
     #[serde(rename = "databasesToTables", default, skip_serializing_if = "Option::is_none")]
     pub databases_to_tables: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesMySqlTaskOutput {
@@ -2752,7 +2961,11 @@ pub struct GetUserTablesMySqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesMySqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesMySqlTaskOutput>,
 }
 impl GetUserTablesMySqlTaskProperties {
@@ -2789,10 +3002,19 @@ pub struct GetUserTablesOracleTaskOutput {
     #[serde(rename = "schemaName", default, skip_serializing_if = "Option::is_none")]
     pub schema_name: Option<String>,
     #[doc = "List of valid tables found for this schema"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<DatabaseTable>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesOracleTaskOutput {
@@ -2809,7 +3031,11 @@ pub struct GetUserTablesOracleTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesOracleTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesOracleTaskOutput>,
 }
 impl GetUserTablesOracleTaskProperties {
@@ -2846,10 +3072,19 @@ pub struct GetUserTablesPostgreSqlTaskOutput {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "List of valid tables found for this database"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<DatabaseTable>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesPostgreSqlTaskOutput {
@@ -2866,7 +3101,11 @@ pub struct GetUserTablesPostgreSqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesPostgreSqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesPostgreSqlTaskOutput>,
 }
 impl GetUserTablesPostgreSqlTaskProperties {
@@ -2922,7 +3161,12 @@ pub struct GetUserTablesSqlSyncTaskOutput {
     #[serde(rename = "tableValidationErrors", default, skip_serializing_if = "Option::is_none")]
     pub table_validation_errors: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesSqlSyncTaskOutput {
@@ -2939,7 +3183,11 @@ pub struct GetUserTablesSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesSqlSyncTaskOutput>,
 }
 impl GetUserTablesSqlSyncTaskProperties {
@@ -2983,7 +3231,12 @@ pub struct GetUserTablesSqlTaskOutput {
     #[serde(rename = "databasesToTables", default, skip_serializing_if = "Option::is_none")]
     pub databases_to_tables: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesSqlTaskOutput {
@@ -3000,7 +3253,11 @@ pub struct GetUserTablesSqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesSqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesSqlTaskOutput>,
     #[doc = "Task id "]
     #[serde(rename = "taskId", default, skip_serializing_if = "Option::is_none")]
@@ -3032,7 +3289,12 @@ impl InstallOciDriverTaskInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstallOciDriverTaskOutput {
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl InstallOciDriverTaskOutput {
@@ -3049,7 +3311,11 @@ pub struct InstallOciDriverTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<InstallOciDriverTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<InstallOciDriverTaskOutput>,
 }
 impl InstallOciDriverTaskProperties {
@@ -3068,7 +3334,11 @@ pub struct IntegrationRuntimeMonitoringData {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Integration Runtime node monitoring data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<NodeMonitoringData>,
 }
 impl IntegrationRuntimeMonitoringData {
@@ -3211,7 +3481,11 @@ impl MigrateMiSyncCompleteCommandInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrateMiSyncCompleteCommandOutput {
     #[doc = "List of errors that happened during the command execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ReportableException>,
 }
 impl MigrateMiSyncCompleteCommandOutput {
@@ -3248,7 +3522,11 @@ pub struct MigrateMongoDbTaskProperties {
     #[doc = "Describes how a MongoDB data migration should be performed"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MongoDbMigrationSettings>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MongoDbProgress>,
 }
 impl MigrateMongoDbTaskProperties {
@@ -3344,7 +3622,11 @@ pub struct MigrateMySqlAzureDbForMySqlOfflineTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateMySqlAzureDbForMySqlOfflineTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateMySqlAzureDbForMySqlOfflineTaskOutput>,
     #[doc = "whether the task can be cloned or not"]
     #[serde(rename = "isCloneable", default, skip_serializing_if = "Option::is_none")]
@@ -3440,7 +3722,11 @@ pub struct MigrateMySqlAzureDbForMySqlSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigrateMySqlAzureDbForMySqlSyncTaskOutputDatabaseError {
@@ -3649,7 +3935,11 @@ pub struct MigrateMySqlAzureDbForMySqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateMySqlAzureDbForMySqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateMySqlAzureDbForMySqlSyncTaskOutput>,
 }
 impl MigrateMySqlAzureDbForMySqlSyncTaskProperties {
@@ -3670,7 +3960,11 @@ pub struct MigrateOracleAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateOracleAzureDbPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateOracleAzureDbPostgreSqlSyncTaskOutput>,
 }
 impl MigrateOracleAzureDbForPostgreSqlSyncTaskProperties {
@@ -3764,7 +4058,11 @@ pub struct MigrateOracleAzureDbPostgreSqlSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigrateOracleAzureDbPostgreSqlSyncTaskOutputDatabaseError {
@@ -3986,7 +4284,12 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncDatabaseInput {
     #[serde(rename = "targetSetting", default, skip_serializing_if = "Option::is_none")]
     pub target_setting: Option<serde_json::Value>,
     #[doc = "Tables selected for migration"]
-    #[serde(rename = "selectedTables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedTables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_tables: Vec<MigratePostgreSqlAzureDbForPostgreSqlSyncDatabaseTableInput>,
 }
 impl MigratePostgreSqlAzureDbForPostgreSqlSyncDatabaseInput {
@@ -4063,7 +4366,11 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutputDatabaseError {
@@ -4155,7 +4462,11 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutputError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub error: Option<ReportableException>,
     #[doc = "List of error events"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutputError {
@@ -4292,7 +4603,11 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigratePostgreSqlAzureDbForPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutput>,
     #[doc = "task id"]
     #[serde(rename = "taskId", default, skip_serializing_if = "Option::is_none")]
@@ -4498,7 +4813,11 @@ pub struct MigrateSchemaSqlServerSqlDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSchemaSqlServerSqlDbTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSchemaSqlServerSqlDbTaskOutput>,
     #[doc = "DateTime in UTC when the task was created"]
     #[serde(rename = "createdOn", default, skip_serializing_if = "Option::is_none")]
@@ -4642,7 +4961,11 @@ pub struct MigrateSqlServerSqlDbSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigrateSqlServerSqlDbSyncTaskOutputDatabaseError {
@@ -4855,7 +5178,11 @@ pub struct MigrateSqlServerSqlDbSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlDbSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlDbSyncTaskOutput>,
 }
 impl MigrateSqlServerSqlDbSyncTaskProperties {
@@ -4952,7 +5279,12 @@ pub struct MigrateSqlServerSqlDbTaskOutputDatabaseLevel {
     #[serde(rename = "resultPrefix", default, skip_serializing_if = "Option::is_none")]
     pub result_prefix: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
     #[doc = "Summary of object results in the migration"]
     #[serde(rename = "objectSummary", default, skip_serializing_if = "Option::is_none")]
@@ -5061,7 +5393,12 @@ pub struct MigrateSqlServerSqlDbTaskOutputMigrationLevel {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlDbTaskOutputMigrationLevel {
@@ -5158,7 +5495,11 @@ pub struct MigrateSqlServerSqlDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlDbTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlDbTaskOutput>,
     #[doc = "task id"]
     #[serde(rename = "taskId", default, skip_serializing_if = "Option::is_none")]
@@ -5194,7 +5535,12 @@ pub struct MigrateSqlServerSqlMiDatabaseInput {
     #[serde(rename = "backupFileShare", default, skip_serializing_if = "Option::is_none")]
     pub backup_file_share: Option<FileShare>,
     #[doc = "The list of backup files to be used in case of existing backups."]
-    #[serde(rename = "backupFilePaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupFilePaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_file_paths: Vec<String>,
     #[doc = "id of the database"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5266,7 +5612,12 @@ pub struct MigrateSqlServerSqlMiSyncTaskOutputDatabaseLevel {
     #[serde(rename = "lastRestoredBackupSetInfo", default, skip_serializing_if = "Option::is_none")]
     pub last_restored_backup_set_info: Option<BackupSetInfo>,
     #[doc = "Backup sets that are currently active (Either being uploaded or getting restored)"]
-    #[serde(rename = "activeBackupSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeBackupSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_backup_sets: Vec<BackupSetInfo>,
     #[doc = "Name of container created in the Azure Storage account where backups are copied to"]
     #[serde(rename = "containerName", default, skip_serializing_if = "Option::is_none")]
@@ -5278,7 +5629,12 @@ pub struct MigrateSqlServerSqlMiSyncTaskOutputDatabaseLevel {
     #[serde(rename = "isFullBackupRestored", default, skip_serializing_if = "Option::is_none")]
     pub is_full_backup_restored: Option<bool>,
     #[doc = "Migration exceptions and warnings"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiSyncTaskOutputDatabaseLevel {
@@ -5384,7 +5740,11 @@ pub struct MigrateSqlServerSqlMiSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlMiSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlMiSyncTaskOutput>,
     #[doc = "DateTime in UTC when the task was created"]
     #[serde(rename = "createdOn", default, skip_serializing_if = "Option::is_none")]
@@ -5412,10 +5772,20 @@ pub struct MigrateSqlServerSqlMiTaskInput {
     #[serde(rename = "startedOn", default, skip_serializing_if = "Option::is_none")]
     pub started_on: Option<String>,
     #[doc = "Logins to migrate."]
-    #[serde(rename = "selectedLogins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedLogins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_logins: Vec<String>,
     #[doc = "Agent Jobs to migrate."]
-    #[serde(rename = "selectedAgentJobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedAgentJobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_agent_jobs: Vec<String>,
     #[doc = "File share information with Path, Username, and Password."]
     #[serde(rename = "backupFileShare", default, skip_serializing_if = "Option::is_none")]
@@ -5491,7 +5861,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputAgentJobLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Migration errors and warnings per job"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputAgentJobLevel {
@@ -5534,7 +5909,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputDatabaseLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Migration exceptions and warnings"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputDatabaseLevel {
@@ -5595,7 +5975,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputLoginLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Login migration errors and warnings per login"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputLoginLevel {
@@ -5641,7 +6026,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputMigrationLevel {
     #[serde(rename = "serverRoleResults", default, skip_serializing_if = "Option::is_none")]
     pub server_role_results: Option<String>,
     #[doc = "List of orphaned users."]
-    #[serde(rename = "orphanedUsersInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orphanedUsersInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub orphaned_users_info: Vec<OrphanedUserInfo>,
     #[doc = "Selected databases as a map from database name to database id"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5659,7 +6049,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputMigrationLevel {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputMigrationLevel {
@@ -5693,7 +6088,11 @@ pub struct MigrateSqlServerSqlMiTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlMiTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlMiTaskOutput>,
     #[doc = "task id"]
     #[serde(rename = "taskId", default, skip_serializing_if = "Option::is_none")]
@@ -5734,7 +6133,12 @@ pub struct MigrateSqlServerSqlServerDatabaseInput {
     #[serde(rename = "backupAndRestoreFolder", default, skip_serializing_if = "Option::is_none")]
     pub backup_and_restore_folder: Option<String>,
     #[doc = "The list of database files"]
-    #[serde(rename = "databaseFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_files: Vec<DatabaseFileInput>,
 }
 impl MigrateSqlServerSqlServerDatabaseInput {
@@ -5803,7 +6207,12 @@ pub struct MigrateSsisTaskOutputMigrationLevel {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
     #[doc = "Current stage of SSIS migration"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5852,7 +6261,12 @@ pub struct MigrateSsisTaskOutputProjectLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Migration exceptions and warnings"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSsisTaskOutputProjectLevel {
@@ -5879,7 +6293,11 @@ pub struct MigrateSsisTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSsisTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSsisTaskOutput>,
 }
 impl MigrateSsisTaskProperties {
@@ -5916,7 +6334,11 @@ pub struct MigrateSyncCompleteCommandOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "List of errors that happened during the command execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ReportableException>,
 }
 impl MigrateSyncCompleteCommandOutput {
@@ -5956,7 +6378,12 @@ pub struct MigrationEligibilityInfo {
     #[serde(rename = "isEligibleForMigration", default, skip_serializing_if = "Option::is_none")]
     pub is_eligible_for_migration: Option<bool>,
     #[doc = "Information about eligibility failure for the server object."]
-    #[serde(rename = "validationMessages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationMessages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_messages: Vec<String>,
 }
 impl MigrationEligibilityInfo {
@@ -6104,10 +6531,20 @@ pub struct MigrationStatusDetails {
     #[serde(rename = "lastRestoredBackupSetInfo", default, skip_serializing_if = "Option::is_none")]
     pub last_restored_backup_set_info: Option<SqlBackupSetInfo>,
     #[doc = "Backup sets that are currently active."]
-    #[serde(rename = "activeBackupSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeBackupSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_backup_sets: Vec<SqlBackupSetInfo>,
     #[doc = "Files that are not valid backup files."]
-    #[serde(rename = "invalidFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "invalidFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub invalid_files: Vec<String>,
     #[doc = "Name of blob container."]
     #[serde(rename = "blobContainerName", default, skip_serializing_if = "Option::is_none")]
@@ -6122,7 +6559,12 @@ pub struct MigrationStatusDetails {
     #[serde(rename = "completeRestoreErrorMessage", default, skip_serializing_if = "Option::is_none")]
     pub complete_restore_error_message: Option<String>,
     #[doc = "File upload blocking errors, if any."]
-    #[serde(rename = "fileUploadBlockingErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fileUploadBlockingErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_upload_blocking_errors: Vec<String>,
     #[doc = "File name that is currently being restored."]
     #[serde(rename = "currentRestoringFilename", default, skip_serializing_if = "Option::is_none")]
@@ -7219,7 +7661,11 @@ pub struct NonSqlDataMigrationTableResult {
     #[serde(rename = "elapsedTimeInMiliseconds", default, skip_serializing_if = "Option::is_none")]
     pub elapsed_time_in_miliseconds: Option<f64>,
     #[doc = "List of errors, if any, during migration"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<DataMigrationError>,
 }
 impl NonSqlDataMigrationTableResult {
@@ -7354,7 +7800,11 @@ pub struct ODataError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Inner errors that caused this error"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ODataError>,
 }
 impl ODataError {
@@ -7380,7 +7830,11 @@ impl OfflineConfiguration {
 #[doc = "Result of the request to list SQL operations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDefinition>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -7508,7 +7962,12 @@ pub struct OracleOciDriverInfo {
     #[serde(rename = "assemblyVersion", default, skip_serializing_if = "Option::is_none")]
     pub assembly_version: Option<String>,
     #[doc = "List of Oracle database versions supported by this driver. Only major minor of the version is listed."]
-    #[serde(rename = "supportedOracleVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOracleVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_oracle_versions: Vec<String>,
 }
 impl OracleOciDriverInfo {
@@ -7649,7 +8108,11 @@ impl ProjectFileProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProjectList {
     #[doc = "List of projects"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Project>,
     #[doc = "URL to load the next page of projects"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7688,7 +8151,12 @@ pub struct ProjectProperties {
     #[serde(rename = "targetConnectionInfo", default, skip_serializing_if = "Option::is_none")]
     pub target_connection_info: Option<ConnectionInfo>,
     #[doc = "List of DatabaseInfo"]
-    #[serde(rename = "databasesInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databasesInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases_info: Vec<DatabaseInfo>,
     #[doc = "The project's provisioning state"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -7866,13 +8334,21 @@ pub struct ProjectTaskProperties {
     #[serde(rename = "taskType")]
     pub task_type: project_task_properties::TaskType,
     #[doc = "Array of errors. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ODataError>,
     #[doc = "The state of the task. This is ignored if submitted."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<project_task_properties::State>,
     #[doc = "Array of command properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub commands: Vec<CommandProperties>,
     #[doc = "Key value pairs of client data to attach meta data information to task"]
     #[serde(rename = "clientData", default, skip_serializing_if = "Option::is_none")]
@@ -8210,7 +8686,11 @@ pub mod quota {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaList {
     #[doc = "List of quotas"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Quota>,
     #[doc = "URL to load the next page of quotas, or null or missing if this is the last page"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8366,19 +8846,40 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<ResourceSkuCapacity>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The api versions that support this SKU."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Metadata for retrieving price info."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<ResourceSkuCosts>,
     #[doc = "A name value pair to describe the capability."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -8489,7 +8990,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason code for restriction."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -8962,7 +9467,11 @@ pub mod service_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceOperationList {
     #[doc = "List of actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceOperation>,
     #[doc = "URL to load the next page of actions"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9001,7 +9510,11 @@ impl ServiceSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSkuList {
     #[doc = "List of service SKUs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableServiceSku>,
     #[doc = "URL to load the next page of service SKUs"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9121,7 +9634,12 @@ pub struct SqlBackupSetInfo {
     #[serde(rename = "backupType", default, skip_serializing_if = "Option::is_none")]
     pub backup_type: Option<String>,
     #[doc = "List of files in the backup set."]
-    #[serde(rename = "listOfBackupFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "listOfBackupFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub list_of_backup_files: Vec<SqlBackupFileInfo>,
     #[doc = "Backup start date."]
     #[serde(rename = "backupStartDate", default, with = "azure_core::date::rfc3339::option")]
@@ -9139,7 +9657,12 @@ pub struct SqlBackupSetInfo {
     #[serde(rename = "familyCount", default, skip_serializing_if = "Option::is_none")]
     pub family_count: Option<i32>,
     #[doc = "The reasons why the backup set is ignored"]
-    #[serde(rename = "ignoreReasons", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ignoreReasons",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ignore_reasons: Vec<String>,
 }
 impl SqlBackupSetInfo {
@@ -9252,7 +9775,11 @@ impl SqlFileShare {
 #[doc = "A list of SQL Migration Service."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlMigrationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlMigrationService>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -9544,7 +10071,12 @@ pub struct StartMigrationScenarioServerRoleResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<MigrationState>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl StartMigrationScenarioServerRoleResult {
@@ -9834,7 +10366,11 @@ impl TargetLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskList {
     #[doc = "List of tasks"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProjectTask>,
     #[doc = "URL to load the next page of tasks"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9929,7 +10465,12 @@ pub struct UploadOciDriverTaskOutput {
     #[serde(rename = "driverPackageName", default, skip_serializing_if = "Option::is_none")]
     pub driver_package_name: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl UploadOciDriverTaskOutput {
@@ -9946,7 +10487,11 @@ pub struct UploadOciDriverTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<UploadOciDriverTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<UploadOciDriverTaskOutput>,
 }
 impl UploadOciDriverTaskProperties {
@@ -9967,7 +10512,11 @@ pub struct ValidateMigrationInputSqlServerSqlDbSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ValidateSyncMigrationInputSqlServerTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateSyncMigrationInputSqlServerTaskOutput>,
 }
 impl ValidateMigrationInputSqlServerSqlDbSyncTaskProperties {
@@ -10002,7 +10551,12 @@ pub struct ValidateMigrationInputSqlServerSqlMiSyncTaskOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Errors associated with a selected database object"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ValidateMigrationInputSqlServerSqlMiSyncTaskOutput {
@@ -10019,7 +10573,11 @@ pub struct ValidateMigrationInputSqlServerSqlMiSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ValidateMigrationInputSqlServerSqlMiSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateMigrationInputSqlServerSqlMiSyncTaskOutput>,
 }
 impl ValidateMigrationInputSqlServerSqlMiSyncTaskProperties {
@@ -10044,7 +10602,12 @@ pub struct ValidateMigrationInputSqlServerSqlMiTaskInput {
     #[serde(rename = "selectedDatabases")]
     pub selected_databases: Vec<MigrateSqlServerSqlMiDatabaseInput>,
     #[doc = "Logins to migrate"]
-    #[serde(rename = "selectedLogins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedLogins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_logins: Vec<String>,
     #[doc = "File share information with Path, Username, and Password."]
     #[serde(rename = "backupFileShare", default, skip_serializing_if = "Option::is_none")]
@@ -10084,19 +10647,44 @@ pub struct ValidateMigrationInputSqlServerSqlMiTaskOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Errors associated with the RestoreDatabaseName"]
-    #[serde(rename = "restoreDatabaseNameErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreDatabaseNameErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_database_name_errors: Vec<ReportableException>,
     #[doc = "Errors associated with the BackupFolder path"]
-    #[serde(rename = "backupFolderErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupFolderErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_folder_errors: Vec<ReportableException>,
     #[doc = "Errors associated with backup share user name and password credentials"]
-    #[serde(rename = "backupShareCredentialsErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupShareCredentialsErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_share_credentials_errors: Vec<ReportableException>,
     #[doc = "Errors associated with the storage account provided."]
-    #[serde(rename = "backupStorageAccountErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupStorageAccountErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_storage_account_errors: Vec<ReportableException>,
     #[doc = "Errors associated with existing backup files."]
-    #[serde(rename = "existingBackupErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "existingBackupErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub existing_backup_errors: Vec<ReportableException>,
     #[doc = "Information about backup files when existing backup mode is used."]
     #[serde(rename = "databaseBackupInfo", default, skip_serializing_if = "Option::is_none")]
@@ -10116,7 +10704,11 @@ pub struct ValidateMigrationInputSqlServerSqlMiTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ValidateMigrationInputSqlServerSqlMiTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateMigrationInputSqlServerSqlMiTaskOutput>,
 }
 impl ValidateMigrationInputSqlServerSqlMiTaskProperties {
@@ -10137,7 +10729,11 @@ pub struct ValidateMongoDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MongoDbMigrationSettings>,
     #[doc = "An array containing a single MongoDbMigrationProgress object"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MongoDbMigrationProgress>,
 }
 impl ValidateMongoDbTaskProperties {
@@ -10158,7 +10754,11 @@ pub struct ValidateOracleAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateOracleAzureDbPostgreSqlSyncTaskInput>,
     #[doc = "An array containing a single validation error response object"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateOracleAzureDbPostgreSqlSyncTaskOutput>,
 }
 impl ValidateOracleAzureDbForPostgreSqlSyncTaskProperties {
@@ -10174,7 +10774,12 @@ impl ValidateOracleAzureDbForPostgreSqlSyncTaskProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ValidateOracleAzureDbPostgreSqlSyncTaskOutput {
     #[doc = "Errors associated with a selected database object"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ValidateOracleAzureDbPostgreSqlSyncTaskOutput {
@@ -10218,7 +10823,12 @@ pub struct ValidateSyncMigrationInputSqlServerTaskOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Errors associated with a selected database object"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ValidateSyncMigrationInputSqlServerTaskOutput {
diff --git a/services/mgmt/datamigration/src/package_preview_2022_03/models.rs b/services/mgmt/datamigration/src/package_preview_2022_03/models.rs
index 5e62e84d39..0bceef9a9d 100644
--- a/services/mgmt/datamigration/src/package_preview_2022_03/models.rs
+++ b/services/mgmt/datamigration/src/package_preview_2022_03/models.rs
@@ -364,7 +364,12 @@ pub struct BackupSetInfo {
     #[serde(rename = "backupType", default, skip_serializing_if = "Option::is_none")]
     pub backup_type: Option<BackupType>,
     #[doc = "List of files in the backup set"]
-    #[serde(rename = "listOfBackupFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "listOfBackupFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub list_of_backup_files: Vec<BackupFileInfo>,
     #[doc = "Name of the database to which the backup set belongs"]
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
@@ -462,7 +467,12 @@ pub struct CheckOciDriverTaskOutput {
     #[serde(rename = "installedDriver", default, skip_serializing_if = "Option::is_none")]
     pub installed_driver: Option<OracleOciDriverInfo>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl CheckOciDriverTaskOutput {
@@ -479,7 +489,11 @@ pub struct CheckOciDriverTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<CheckOciDriverTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<CheckOciDriverTaskOutput>,
 }
 impl CheckOciDriverTaskProperties {
@@ -498,7 +512,11 @@ pub struct CommandProperties {
     #[serde(rename = "commandType")]
     pub command_type: command_properties::CommandType,
     #[doc = "Array of errors. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ODataError>,
     #[doc = "The state of the command. This is ignored if submitted."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -620,7 +638,11 @@ pub struct ConnectToMongoDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MongoDbConnectionInfo>,
     #[doc = "An array containing a single MongoDbClusterInfo object"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MongoDbClusterInfo>,
 }
 impl ConnectToMongoDbTaskProperties {
@@ -667,7 +689,11 @@ pub struct ConnectToSourceMySqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceMySqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceNonSqlTaskOutput>,
 }
 impl ConnectToSourceMySqlTaskProperties {
@@ -692,10 +718,19 @@ pub struct ConnectToSourceNonSqlTaskOutput {
     #[serde(rename = "serverProperties", default, skip_serializing_if = "Option::is_none")]
     pub server_properties: Option<ServerProperties>,
     #[doc = "List of databases on the server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourceNonSqlTaskOutput {
@@ -722,13 +757,22 @@ pub struct ConnectToSourceOracleSyncTaskOutput {
     #[serde(rename = "sourceServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_version: Option<String>,
     #[doc = "List of schemas on source server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Source server brand version"]
     #[serde(rename = "sourceServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourceOracleSyncTaskOutput {
@@ -745,7 +789,11 @@ pub struct ConnectToSourceOracleSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceOracleSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceOracleSyncTaskOutput>,
 }
 impl ConnectToSourceOracleSyncTaskProperties {
@@ -779,13 +827,22 @@ pub struct ConnectToSourcePostgreSqlSyncTaskOutput {
     #[serde(rename = "sourceServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_version: Option<String>,
     #[doc = "List of databases on source server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Source server brand version"]
     #[serde(rename = "sourceServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourcePostgreSqlSyncTaskOutput {
@@ -802,7 +859,11 @@ pub struct ConnectToSourcePostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourcePostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourcePostgreSqlSyncTaskOutput>,
 }
 impl ConnectToSourcePostgreSqlSyncTaskProperties {
@@ -823,7 +884,11 @@ pub struct ConnectToSourceSqlServerSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceSqlServerTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceSqlServerTaskOutput>,
 }
 impl ConnectToSourceSqlServerSyncTaskProperties {
@@ -913,7 +978,12 @@ pub struct ConnectToSourceSqlServerTaskOutputAgentJobLevel {
     #[serde(rename = "lastExecutedOn", default, with = "azure_core::date::rfc3339::option")]
     pub last_executed_on: Option<time::OffsetDateTime>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
     #[doc = "Information about migration eligibility of a server object"]
     #[serde(rename = "migrationEligibility", default, skip_serializing_if = "Option::is_none")]
@@ -945,7 +1015,12 @@ pub struct ConnectToSourceSqlServerTaskOutputDatabaseLevel {
     #[serde(rename = "sizeMB", default, skip_serializing_if = "Option::is_none")]
     pub size_mb: Option<f64>,
     #[doc = "The list of database files"]
-    #[serde(rename = "databaseFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_files: Vec<DatabaseFileInfo>,
     #[doc = "An enumeration of SQL Server database compatibility levels"]
     #[serde(rename = "compatibilityLevel", default, skip_serializing_if = "Option::is_none")]
@@ -1023,7 +1098,12 @@ pub struct ConnectToSourceSqlServerTaskOutputTaskLevel {
     #[serde(rename = "sourceServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub source_server_brand_version: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToSourceSqlServerTaskOutputTaskLevel {
@@ -1049,7 +1129,11 @@ pub struct ConnectToSourceSqlServerTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToSourceSqlServerTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToSourceSqlServerTaskOutput>,
     #[doc = "Task id "]
     #[serde(rename = "taskId", default, skip_serializing_if = "Option::is_none")]
@@ -1097,13 +1181,22 @@ pub struct ConnectToTargetAzureDbForMySqlTaskOutput {
     #[serde(rename = "serverVersion", default, skip_serializing_if = "Option::is_none")]
     pub server_version: Option<String>,
     #[doc = "List of databases on target server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Target server brand version"]
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetAzureDbForMySqlTaskOutput {
@@ -1120,7 +1213,11 @@ pub struct ConnectToTargetAzureDbForMySqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetAzureDbForMySqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetAzureDbForMySqlTaskOutput>,
 }
 impl ConnectToTargetAzureDbForMySqlTaskProperties {
@@ -1160,13 +1257,22 @@ pub struct ConnectToTargetAzureDbForPostgreSqlSyncTaskOutput {
     #[serde(rename = "targetServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_version: Option<String>,
     #[doc = "List of databases on target server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Target server brand version"]
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetAzureDbForPostgreSqlSyncTaskOutput {
@@ -1183,7 +1289,11 @@ pub struct ConnectToTargetAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetAzureDbForPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetAzureDbForPostgreSqlSyncTaskOutput>,
 }
 impl ConnectToTargetAzureDbForPostgreSqlSyncTaskProperties {
@@ -1214,16 +1324,30 @@ pub struct ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskOutput {
     #[serde(rename = "targetServerVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_version: Option<String>,
     #[doc = "List of databases on target server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
     #[doc = "Target server brand version"]
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
     #[doc = "Mapping of schemas per database"]
-    #[serde(rename = "databaseSchemaMap", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseSchemaMap",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_schema_map: Vec<serde_json::Value>,
 }
 impl ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskOutput {
@@ -1240,7 +1364,11 @@ pub struct ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskOutput>,
 }
 impl ConnectToTargetOracleAzureDbForPostgreSqlSyncTaskProperties {
@@ -1300,7 +1428,11 @@ pub struct ConnectToTargetSqlDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlDbTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlDbTaskOutput>,
     #[doc = "DateTime in UTC when the task was created"]
     #[serde(rename = "createdOn", default, skip_serializing_if = "Option::is_none")]
@@ -1344,7 +1476,12 @@ pub struct ConnectToTargetSqlMiSyncTaskOutput {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetSqlMiSyncTaskOutput {
@@ -1361,7 +1498,11 @@ pub struct ConnectToTargetSqlMiSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlMiSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlMiSyncTaskOutput>,
 }
 impl ConnectToTargetSqlMiSyncTaskProperties {
@@ -1412,13 +1553,27 @@ pub struct ConnectToTargetSqlMiTaskOutput {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "List of logins on the target server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logins: Vec<String>,
     #[doc = "List of agent jobs on the target server."]
-    #[serde(rename = "agentJobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentJobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_jobs: Vec<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ConnectToTargetSqlMiTaskOutput {
@@ -1435,7 +1590,11 @@ pub struct ConnectToTargetSqlMiTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlMiTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlMiTaskOutput>,
 }
 impl ConnectToTargetSqlMiTaskProperties {
@@ -1474,7 +1633,11 @@ pub struct ConnectToTargetSqlSqlDbSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ConnectToTargetSqlSqlDbSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ConnectToTargetSqlDbTaskOutput>,
 }
 impl ConnectToTargetSqlSqlDbSyncTaskProperties {
@@ -1641,7 +1804,12 @@ pub struct DataMigrationProjectMetadata {
     #[serde(rename = "targetUsingWinAuth", default, skip_serializing_if = "Option::is_none")]
     pub target_using_win_auth: Option<bool>,
     #[doc = "List of tables selected for migration"]
-    #[serde(rename = "selectedMigrationTables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedMigrationTables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_migration_tables: Vec<MigrationTableMetadata>,
 }
 impl DataMigrationProjectMetadata {
@@ -1678,7 +1846,11 @@ impl DataMigrationService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataMigrationServiceList {
     #[doc = "List of services"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataMigrationService>,
     #[doc = "URL to load the next page of services"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1794,7 +1966,12 @@ pub struct DataMigrationServiceStatusResponse {
     #[serde(rename = "vmSize", default, skip_serializing_if = "Option::is_none")]
     pub vm_size: Option<String>,
     #[doc = "The list of supported task types"]
-    #[serde(rename = "supportedTaskTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTaskTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_task_types: Vec<String>,
 }
 impl DataMigrationServiceStatusResponse {
@@ -1872,7 +2049,12 @@ pub struct DatabaseBackupInfo {
     #[serde(rename = "backupType", default, skip_serializing_if = "Option::is_none")]
     pub backup_type: Option<BackupType>,
     #[doc = "The list of backup files for the current database."]
-    #[serde(rename = "backupFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_files: Vec<String>,
     #[doc = "Position of current database backup in the file."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2070,7 +2252,11 @@ impl DatabaseMigration {
 #[doc = "A list of Database Migrations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseMigrationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseMigration>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -2206,7 +2392,12 @@ pub struct DatabaseMigrationPropertiesSqlDb {
     #[serde(rename = "offlineConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub offline_configuration: Option<SqlDbOfflineConfiguration>,
     #[doc = "List of tables to copy."]
-    #[serde(rename = "tableList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tableList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub table_list: Vec<String>,
 }
 impl DatabaseMigrationPropertiesSqlDb {
@@ -2643,7 +2834,12 @@ pub struct ExecutionStatistics {
     #[serde(rename = "hasErrors", default, skip_serializing_if = "Option::is_none")]
     pub has_errors: Option<bool>,
     #[doc = "List of sql Errors"]
-    #[serde(rename = "sqlErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sqlErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sql_errors: Vec<String>,
 }
 impl ExecutionStatistics {
@@ -2655,7 +2851,11 @@ impl ExecutionStatistics {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileList {
     #[doc = "List of files"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProjectFile>,
     #[doc = "URL to load the next page of files"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2758,7 +2958,12 @@ pub struct GetTdeCertificatesSqlTaskOutput {
     #[serde(rename = "base64EncodedCertificates", default, skip_serializing_if = "Option::is_none")]
     pub base64_encoded_certificates: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetTdeCertificatesSqlTaskOutput {
@@ -2775,7 +2980,11 @@ pub struct GetTdeCertificatesSqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetTdeCertificatesSqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetTdeCertificatesSqlTaskOutput>,
 }
 impl GetTdeCertificatesSqlTaskProperties {
@@ -2815,7 +3024,12 @@ pub struct GetUserTablesMySqlTaskOutput {
     #[serde(rename = "databasesToTables", default, skip_serializing_if = "Option::is_none")]
     pub databases_to_tables: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesMySqlTaskOutput {
@@ -2832,7 +3046,11 @@ pub struct GetUserTablesMySqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesMySqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesMySqlTaskOutput>,
 }
 impl GetUserTablesMySqlTaskProperties {
@@ -2869,10 +3087,19 @@ pub struct GetUserTablesOracleTaskOutput {
     #[serde(rename = "schemaName", default, skip_serializing_if = "Option::is_none")]
     pub schema_name: Option<String>,
     #[doc = "List of valid tables found for this schema"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<DatabaseTable>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesOracleTaskOutput {
@@ -2889,7 +3116,11 @@ pub struct GetUserTablesOracleTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesOracleTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesOracleTaskOutput>,
 }
 impl GetUserTablesOracleTaskProperties {
@@ -2926,10 +3157,19 @@ pub struct GetUserTablesPostgreSqlTaskOutput {
     #[serde(rename = "databaseName", default, skip_serializing_if = "Option::is_none")]
     pub database_name: Option<String>,
     #[doc = "List of valid tables found for this database"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<DatabaseTable>,
     #[doc = "Validation errors associated with the task"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesPostgreSqlTaskOutput {
@@ -2946,7 +3186,11 @@ pub struct GetUserTablesPostgreSqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesPostgreSqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesPostgreSqlTaskOutput>,
 }
 impl GetUserTablesPostgreSqlTaskProperties {
@@ -3002,7 +3246,12 @@ pub struct GetUserTablesSqlSyncTaskOutput {
     #[serde(rename = "tableValidationErrors", default, skip_serializing_if = "Option::is_none")]
     pub table_validation_errors: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesSqlSyncTaskOutput {
@@ -3019,7 +3268,11 @@ pub struct GetUserTablesSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesSqlSyncTaskOutput>,
 }
 impl GetUserTablesSqlSyncTaskProperties {
@@ -3063,7 +3316,12 @@ pub struct GetUserTablesSqlTaskOutput {
     #[serde(rename = "databasesToTables", default, skip_serializing_if = "Option::is_none")]
     pub databases_to_tables: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl GetUserTablesSqlTaskOutput {
@@ -3080,7 +3338,11 @@ pub struct GetUserTablesSqlTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<GetUserTablesSqlTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<GetUserTablesSqlTaskOutput>,
     #[doc = "Task id "]
     #[serde(rename = "taskId", default, skip_serializing_if = "Option::is_none")]
@@ -3112,7 +3374,12 @@ impl InstallOciDriverTaskInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstallOciDriverTaskOutput {
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl InstallOciDriverTaskOutput {
@@ -3129,7 +3396,11 @@ pub struct InstallOciDriverTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<InstallOciDriverTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<InstallOciDriverTaskOutput>,
 }
 impl InstallOciDriverTaskProperties {
@@ -3148,7 +3419,11 @@ pub struct IntegrationRuntimeMonitoringData {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Integration Runtime node monitoring data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<NodeMonitoringData>,
 }
 impl IntegrationRuntimeMonitoringData {
@@ -3291,7 +3566,11 @@ impl MigrateMiSyncCompleteCommandInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrateMiSyncCompleteCommandOutput {
     #[doc = "List of errors that happened during the command execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ReportableException>,
 }
 impl MigrateMiSyncCompleteCommandOutput {
@@ -3328,7 +3607,11 @@ pub struct MigrateMongoDbTaskProperties {
     #[doc = "Describes how a MongoDB data migration should be performed"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MongoDbMigrationSettings>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MongoDbProgress>,
 }
 impl MigrateMongoDbTaskProperties {
@@ -3424,7 +3707,11 @@ pub struct MigrateMySqlAzureDbForMySqlOfflineTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateMySqlAzureDbForMySqlOfflineTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateMySqlAzureDbForMySqlOfflineTaskOutput>,
     #[doc = "whether the task can be cloned or not"]
     #[serde(rename = "isCloneable", default, skip_serializing_if = "Option::is_none")]
@@ -3520,7 +3807,11 @@ pub struct MigrateMySqlAzureDbForMySqlSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigrateMySqlAzureDbForMySqlSyncTaskOutputDatabaseError {
@@ -3729,7 +4020,11 @@ pub struct MigrateMySqlAzureDbForMySqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateMySqlAzureDbForMySqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateMySqlAzureDbForMySqlSyncTaskOutput>,
 }
 impl MigrateMySqlAzureDbForMySqlSyncTaskProperties {
@@ -3750,7 +4045,11 @@ pub struct MigrateOracleAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateOracleAzureDbPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateOracleAzureDbPostgreSqlSyncTaskOutput>,
 }
 impl MigrateOracleAzureDbForPostgreSqlSyncTaskProperties {
@@ -3844,7 +4143,11 @@ pub struct MigrateOracleAzureDbPostgreSqlSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigrateOracleAzureDbPostgreSqlSyncTaskOutputDatabaseError {
@@ -4066,7 +4369,12 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncDatabaseInput {
     #[serde(rename = "targetSetting", default, skip_serializing_if = "Option::is_none")]
     pub target_setting: Option<serde_json::Value>,
     #[doc = "Tables selected for migration"]
-    #[serde(rename = "selectedTables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedTables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_tables: Vec<MigratePostgreSqlAzureDbForPostgreSqlSyncDatabaseTableInput>,
 }
 impl MigratePostgreSqlAzureDbForPostgreSqlSyncDatabaseInput {
@@ -4143,7 +4451,11 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutputDatabaseError {
@@ -4235,7 +4547,11 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutputError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub error: Option<ReportableException>,
     #[doc = "List of error events"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutputError {
@@ -4372,7 +4688,11 @@ pub struct MigratePostgreSqlAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigratePostgreSqlAzureDbForPostgreSqlSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigratePostgreSqlAzureDbForPostgreSqlSyncTaskOutput>,
     #[doc = "task id"]
     #[serde(rename = "taskId", default, skip_serializing_if = "Option::is_none")]
@@ -4578,7 +4898,11 @@ pub struct MigrateSchemaSqlServerSqlDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSchemaSqlServerSqlDbTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSchemaSqlServerSqlDbTaskOutput>,
     #[doc = "DateTime in UTC when the task was created"]
     #[serde(rename = "createdOn", default, skip_serializing_if = "Option::is_none")]
@@ -4722,7 +5046,11 @@ pub struct MigrateSqlServerSqlDbSyncTaskOutputDatabaseError {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "List of error events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SyncMigrationDatabaseErrorEvent>,
 }
 impl MigrateSqlServerSqlDbSyncTaskOutputDatabaseError {
@@ -4935,7 +5263,11 @@ pub struct MigrateSqlServerSqlDbSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlDbSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlDbSyncTaskOutput>,
 }
 impl MigrateSqlServerSqlDbSyncTaskProperties {
@@ -5032,7 +5364,12 @@ pub struct MigrateSqlServerSqlDbTaskOutputDatabaseLevel {
     #[serde(rename = "resultPrefix", default, skip_serializing_if = "Option::is_none")]
     pub result_prefix: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
     #[doc = "Summary of object results in the migration"]
     #[serde(rename = "objectSummary", default, skip_serializing_if = "Option::is_none")]
@@ -5141,7 +5478,12 @@ pub struct MigrateSqlServerSqlDbTaskOutputMigrationLevel {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlDbTaskOutputMigrationLevel {
@@ -5238,7 +5580,11 @@ pub struct MigrateSqlServerSqlDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlDbTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlDbTaskOutput>,
     #[doc = "task id"]
     #[serde(rename = "taskId", default, skip_serializing_if = "Option::is_none")]
@@ -5274,7 +5620,12 @@ pub struct MigrateSqlServerSqlMiDatabaseInput {
     #[serde(rename = "backupFileShare", default, skip_serializing_if = "Option::is_none")]
     pub backup_file_share: Option<FileShare>,
     #[doc = "The list of backup files to be used in case of existing backups."]
-    #[serde(rename = "backupFilePaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupFilePaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_file_paths: Vec<String>,
     #[doc = "id of the database"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5346,7 +5697,12 @@ pub struct MigrateSqlServerSqlMiSyncTaskOutputDatabaseLevel {
     #[serde(rename = "lastRestoredBackupSetInfo", default, skip_serializing_if = "Option::is_none")]
     pub last_restored_backup_set_info: Option<BackupSetInfo>,
     #[doc = "Backup sets that are currently active (Either being uploaded or getting restored)"]
-    #[serde(rename = "activeBackupSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeBackupSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_backup_sets: Vec<BackupSetInfo>,
     #[doc = "Name of container created in the Azure Storage account where backups are copied to"]
     #[serde(rename = "containerName", default, skip_serializing_if = "Option::is_none")]
@@ -5358,7 +5714,12 @@ pub struct MigrateSqlServerSqlMiSyncTaskOutputDatabaseLevel {
     #[serde(rename = "isFullBackupRestored", default, skip_serializing_if = "Option::is_none")]
     pub is_full_backup_restored: Option<bool>,
     #[doc = "Migration exceptions and warnings"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiSyncTaskOutputDatabaseLevel {
@@ -5464,7 +5825,11 @@ pub struct MigrateSqlServerSqlMiSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlMiSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlMiSyncTaskOutput>,
     #[doc = "DateTime in UTC when the task was created"]
     #[serde(rename = "createdOn", default, skip_serializing_if = "Option::is_none")]
@@ -5492,10 +5857,20 @@ pub struct MigrateSqlServerSqlMiTaskInput {
     #[serde(rename = "startedOn", default, skip_serializing_if = "Option::is_none")]
     pub started_on: Option<String>,
     #[doc = "Logins to migrate."]
-    #[serde(rename = "selectedLogins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedLogins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_logins: Vec<String>,
     #[doc = "Agent Jobs to migrate."]
-    #[serde(rename = "selectedAgentJobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedAgentJobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_agent_jobs: Vec<String>,
     #[doc = "File share information with Path, Username, and Password."]
     #[serde(rename = "backupFileShare", default, skip_serializing_if = "Option::is_none")]
@@ -5571,7 +5946,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputAgentJobLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Migration errors and warnings per job"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputAgentJobLevel {
@@ -5614,7 +5994,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputDatabaseLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Migration exceptions and warnings"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputDatabaseLevel {
@@ -5675,7 +6060,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputLoginLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Login migration errors and warnings per login"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputLoginLevel {
@@ -5721,7 +6111,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputMigrationLevel {
     #[serde(rename = "serverRoleResults", default, skip_serializing_if = "Option::is_none")]
     pub server_role_results: Option<String>,
     #[doc = "List of orphaned users."]
-    #[serde(rename = "orphanedUsersInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orphanedUsersInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub orphaned_users_info: Vec<OrphanedUserInfo>,
     #[doc = "Selected databases as a map from database name to database id"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5739,7 +6134,12 @@ pub struct MigrateSqlServerSqlMiTaskOutputMigrationLevel {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSqlServerSqlMiTaskOutputMigrationLevel {
@@ -5773,7 +6173,11 @@ pub struct MigrateSqlServerSqlMiTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSqlServerSqlMiTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSqlServerSqlMiTaskOutput>,
     #[doc = "task id"]
     #[serde(rename = "taskId", default, skip_serializing_if = "Option::is_none")]
@@ -5814,7 +6218,12 @@ pub struct MigrateSqlServerSqlServerDatabaseInput {
     #[serde(rename = "backupAndRestoreFolder", default, skip_serializing_if = "Option::is_none")]
     pub backup_and_restore_folder: Option<String>,
     #[doc = "The list of database files"]
-    #[serde(rename = "databaseFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_files: Vec<DatabaseFileInput>,
 }
 impl MigrateSqlServerSqlServerDatabaseInput {
@@ -5883,7 +6292,12 @@ pub struct MigrateSsisTaskOutputMigrationLevel {
     #[serde(rename = "targetServerBrandVersion", default, skip_serializing_if = "Option::is_none")]
     pub target_server_brand_version: Option<String>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
     #[doc = "Current stage of SSIS migration"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5932,7 +6346,12 @@ pub struct MigrateSsisTaskOutputProjectLevel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Migration exceptions and warnings"]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl MigrateSsisTaskOutputProjectLevel {
@@ -5959,7 +6378,11 @@ pub struct MigrateSsisTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateSsisTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MigrateSsisTaskOutput>,
 }
 impl MigrateSsisTaskProperties {
@@ -5996,7 +6419,11 @@ pub struct MigrateSyncCompleteCommandOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "List of errors that happened during the command execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ReportableException>,
 }
 impl MigrateSyncCompleteCommandOutput {
@@ -6036,7 +6463,12 @@ pub struct MigrationEligibilityInfo {
     #[serde(rename = "isEligibleForMigration", default, skip_serializing_if = "Option::is_none")]
     pub is_eligible_for_migration: Option<bool>,
     #[doc = "Information about eligibility failure for the server object."]
-    #[serde(rename = "validationMessages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationMessages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_messages: Vec<String>,
 }
 impl MigrationEligibilityInfo {
@@ -6184,10 +6616,20 @@ pub struct MigrationStatusDetails {
     #[serde(rename = "lastRestoredBackupSetInfo", default, skip_serializing_if = "Option::is_none")]
     pub last_restored_backup_set_info: Option<SqlBackupSetInfo>,
     #[doc = "Backup sets that are currently active."]
-    #[serde(rename = "activeBackupSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeBackupSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_backup_sets: Vec<SqlBackupSetInfo>,
     #[doc = "Files that are not valid backup files."]
-    #[serde(rename = "invalidFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "invalidFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub invalid_files: Vec<String>,
     #[doc = "Name of blob container."]
     #[serde(rename = "blobContainerName", default, skip_serializing_if = "Option::is_none")]
@@ -6202,7 +6644,12 @@ pub struct MigrationStatusDetails {
     #[serde(rename = "completeRestoreErrorMessage", default, skip_serializing_if = "Option::is_none")]
     pub complete_restore_error_message: Option<String>,
     #[doc = "File upload blocking errors, if any."]
-    #[serde(rename = "fileUploadBlockingErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fileUploadBlockingErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_upload_blocking_errors: Vec<String>,
     #[doc = "File name that is currently being restored."]
     #[serde(rename = "currentRestoringFilename", default, skip_serializing_if = "Option::is_none")]
@@ -7311,7 +7758,11 @@ pub struct NonSqlDataMigrationTableResult {
     #[serde(rename = "elapsedTimeInMiliseconds", default, skip_serializing_if = "Option::is_none")]
     pub elapsed_time_in_miliseconds: Option<f64>,
     #[doc = "List of errors, if any, during migration"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<DataMigrationError>,
 }
 impl NonSqlDataMigrationTableResult {
@@ -7446,7 +7897,11 @@ pub struct ODataError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Inner errors that caused this error"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ODataError>,
 }
 impl ODataError {
@@ -7472,7 +7927,11 @@ impl OfflineConfiguration {
 #[doc = "Result of the request to list SQL operations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDefinition>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -7616,7 +8075,12 @@ pub struct OracleOciDriverInfo {
     #[serde(rename = "assemblyVersion", default, skip_serializing_if = "Option::is_none")]
     pub assembly_version: Option<String>,
     #[doc = "List of Oracle database versions supported by this driver. Only major minor of the version is listed."]
-    #[serde(rename = "supportedOracleVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOracleVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_oracle_versions: Vec<String>,
 }
 impl OracleOciDriverInfo {
@@ -7757,7 +8221,11 @@ impl ProjectFileProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProjectList {
     #[doc = "List of projects"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Project>,
     #[doc = "URL to load the next page of projects"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7796,7 +8264,12 @@ pub struct ProjectProperties {
     #[serde(rename = "targetConnectionInfo", default, skip_serializing_if = "Option::is_none")]
     pub target_connection_info: Option<ConnectionInfo>,
     #[doc = "List of DatabaseInfo"]
-    #[serde(rename = "databasesInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databasesInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases_info: Vec<DatabaseInfo>,
     #[doc = "The project's provisioning state"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -7974,13 +8447,21 @@ pub struct ProjectTaskProperties {
     #[serde(rename = "taskType")]
     pub task_type: project_task_properties::TaskType,
     #[doc = "Array of errors. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ODataError>,
     #[doc = "The state of the task. This is ignored if submitted."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<project_task_properties::State>,
     #[doc = "Array of command properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub commands: Vec<CommandProperties>,
     #[doc = "Key value pairs of client data to attach meta data information to task"]
     #[serde(rename = "clientData", default, skip_serializing_if = "Option::is_none")]
@@ -8318,7 +8799,11 @@ pub mod quota {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaList {
     #[doc = "List of quotas"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Quota>,
     #[doc = "URL to load the next page of quotas, or null or missing if this is the last page"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8474,19 +8959,40 @@ pub struct ResourceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<ResourceSkuCapacity>,
     #[doc = "The set of locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The api versions that support this SKU."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "Metadata for retrieving price info."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<ResourceSkuCosts>,
     #[doc = "A name value pair to describe the capability."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSku {
@@ -8597,7 +9103,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason code for restriction."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -9070,7 +9580,11 @@ pub mod service_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceOperationList {
     #[doc = "List of actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceOperation>,
     #[doc = "URL to load the next page of actions"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9109,7 +9623,11 @@ impl ServiceSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSkuList {
     #[doc = "List of service SKUs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableServiceSku>,
     #[doc = "URL to load the next page of service SKUs"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9232,7 +9750,12 @@ pub struct SqlBackupSetInfo {
     #[serde(rename = "backupType", default, skip_serializing_if = "Option::is_none")]
     pub backup_type: Option<String>,
     #[doc = "List of files in the backup set."]
-    #[serde(rename = "listOfBackupFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "listOfBackupFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub list_of_backup_files: Vec<SqlBackupFileInfo>,
     #[doc = "Backup start date."]
     #[serde(rename = "backupStartDate", default, with = "azure_core::date::rfc3339::option")]
@@ -9250,7 +9773,12 @@ pub struct SqlBackupSetInfo {
     #[serde(rename = "familyCount", default, skip_serializing_if = "Option::is_none")]
     pub family_count: Option<i32>,
     #[doc = "The reasons why the backup set is ignored"]
-    #[serde(rename = "ignoreReasons", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ignoreReasons",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ignore_reasons: Vec<String>,
 }
 impl SqlBackupSetInfo {
@@ -9349,10 +9877,20 @@ pub struct SqlDbMigrationStatusDetails {
     #[serde(rename = "migrationState", default, skip_serializing_if = "Option::is_none")]
     pub migration_state: Option<String>,
     #[doc = "Sql Data Copy errors, if any."]
-    #[serde(rename = "sqlDataCopyErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sqlDataCopyErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sql_data_copy_errors: Vec<String>,
     #[doc = "Details on progress of ADF copy activities."]
-    #[serde(rename = "listOfCopyProgressDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "listOfCopyProgressDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub list_of_copy_progress_details: Vec<CopyProgressDetails>,
 }
 impl SqlDbMigrationStatusDetails {
@@ -9393,7 +9931,11 @@ impl SqlFileShare {
 #[doc = "A list of SQL Migration Service."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlMigrationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlMigrationService>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -9685,7 +10227,12 @@ pub struct StartMigrationScenarioServerRoleResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<MigrationState>,
     #[doc = "Migration exceptions and warnings."]
-    #[serde(rename = "exceptionsAndWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exceptionsAndWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exceptions_and_warnings: Vec<ReportableException>,
 }
 impl StartMigrationScenarioServerRoleResult {
@@ -9975,7 +10522,11 @@ impl TargetLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskList {
     #[doc = "List of tasks"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProjectTask>,
     #[doc = "URL to load the next page of tasks"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10070,7 +10621,12 @@ pub struct UploadOciDriverTaskOutput {
     #[serde(rename = "driverPackageName", default, skip_serializing_if = "Option::is_none")]
     pub driver_package_name: Option<String>,
     #[doc = "Validation errors"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl UploadOciDriverTaskOutput {
@@ -10087,7 +10643,11 @@ pub struct UploadOciDriverTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<UploadOciDriverTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<UploadOciDriverTaskOutput>,
 }
 impl UploadOciDriverTaskProperties {
@@ -10108,7 +10668,11 @@ pub struct ValidateMigrationInputSqlServerSqlDbSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ValidateSyncMigrationInputSqlServerTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateSyncMigrationInputSqlServerTaskOutput>,
 }
 impl ValidateMigrationInputSqlServerSqlDbSyncTaskProperties {
@@ -10143,7 +10707,12 @@ pub struct ValidateMigrationInputSqlServerSqlMiSyncTaskOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Errors associated with a selected database object"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ValidateMigrationInputSqlServerSqlMiSyncTaskOutput {
@@ -10160,7 +10729,11 @@ pub struct ValidateMigrationInputSqlServerSqlMiSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ValidateMigrationInputSqlServerSqlMiSyncTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateMigrationInputSqlServerSqlMiSyncTaskOutput>,
 }
 impl ValidateMigrationInputSqlServerSqlMiSyncTaskProperties {
@@ -10185,7 +10758,12 @@ pub struct ValidateMigrationInputSqlServerSqlMiTaskInput {
     #[serde(rename = "selectedDatabases")]
     pub selected_databases: Vec<MigrateSqlServerSqlMiDatabaseInput>,
     #[doc = "Logins to migrate"]
-    #[serde(rename = "selectedLogins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedLogins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_logins: Vec<String>,
     #[doc = "File share information with Path, Username, and Password."]
     #[serde(rename = "backupFileShare", default, skip_serializing_if = "Option::is_none")]
@@ -10225,19 +10803,44 @@ pub struct ValidateMigrationInputSqlServerSqlMiTaskOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Errors associated with the RestoreDatabaseName"]
-    #[serde(rename = "restoreDatabaseNameErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreDatabaseNameErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_database_name_errors: Vec<ReportableException>,
     #[doc = "Errors associated with the BackupFolder path"]
-    #[serde(rename = "backupFolderErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupFolderErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_folder_errors: Vec<ReportableException>,
     #[doc = "Errors associated with backup share user name and password credentials"]
-    #[serde(rename = "backupShareCredentialsErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupShareCredentialsErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_share_credentials_errors: Vec<ReportableException>,
     #[doc = "Errors associated with the storage account provided."]
-    #[serde(rename = "backupStorageAccountErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupStorageAccountErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_storage_account_errors: Vec<ReportableException>,
     #[doc = "Errors associated with existing backup files."]
-    #[serde(rename = "existingBackupErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "existingBackupErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub existing_backup_errors: Vec<ReportableException>,
     #[doc = "Information about backup files when existing backup mode is used."]
     #[serde(rename = "databaseBackupInfo", default, skip_serializing_if = "Option::is_none")]
@@ -10257,7 +10860,11 @@ pub struct ValidateMigrationInputSqlServerSqlMiTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<ValidateMigrationInputSqlServerSqlMiTaskInput>,
     #[doc = "Task output. This is ignored if submitted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateMigrationInputSqlServerSqlMiTaskOutput>,
 }
 impl ValidateMigrationInputSqlServerSqlMiTaskProperties {
@@ -10278,7 +10885,11 @@ pub struct ValidateMongoDbTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MongoDbMigrationSettings>,
     #[doc = "An array containing a single MongoDbMigrationProgress object"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<MongoDbMigrationProgress>,
 }
 impl ValidateMongoDbTaskProperties {
@@ -10299,7 +10910,11 @@ pub struct ValidateOracleAzureDbForPostgreSqlSyncTaskProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub input: Option<MigrateOracleAzureDbPostgreSqlSyncTaskInput>,
     #[doc = "An array containing a single validation error response object"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<ValidateOracleAzureDbPostgreSqlSyncTaskOutput>,
 }
 impl ValidateOracleAzureDbForPostgreSqlSyncTaskProperties {
@@ -10315,7 +10930,12 @@ impl ValidateOracleAzureDbForPostgreSqlSyncTaskProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ValidateOracleAzureDbPostgreSqlSyncTaskOutput {
     #[doc = "Errors associated with a selected database object"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ValidateOracleAzureDbPostgreSqlSyncTaskOutput {
@@ -10359,7 +10979,12 @@ pub struct ValidateSyncMigrationInputSqlServerTaskOutput {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Errors associated with a selected database object"]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ReportableException>,
 }
 impl ValidateSyncMigrationInputSqlServerTaskOutput {
diff --git a/services/mgmt/dataprotection/src/package_2021_07/models.rs b/services/mgmt/dataprotection/src/package_2021_07/models.rs
index f951c3d1fe..bab33007ff 100644
--- a/services/mgmt/dataprotection/src/package_2021_07/models.rs
+++ b/services/mgmt/dataprotection/src/package_2021_07/models.rs
@@ -87,7 +87,12 @@ pub struct AzureBackupDiscreteRecoveryPoint {
     pub azure_backup_recovery_point: AzureBackupRecoveryPoint,
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
-    #[serde(rename = "recoveryPointDataStoresDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryPointDataStoresDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_point_data_stores_details: Vec<RecoveryPointDataStoreDetails>,
     #[serde(rename = "recoveryPointTime", with = "azure_core::date::rfc3339")]
     pub recovery_point_time: time::OffsetDateTime,
@@ -202,7 +207,12 @@ impl AzureBackupFindRestorableTimeRangesRequestResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureBackupFindRestorableTimeRangesResponse {
     #[doc = "Returns the Restore Ranges available on the Backup Instance."]
-    #[serde(rename = "restorableTimeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restorableTimeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restorable_time_ranges: Vec<RestorableTimeRange>,
     #[serde(rename = "objectType", default, skip_serializing_if = "Option::is_none")]
     pub object_type: Option<String>,
@@ -260,7 +270,12 @@ pub struct AzureBackupJob {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "A List, detailing the errors related to the job"]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<UserFacingError>,
     #[doc = "Extended Information about the job"]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -389,7 +404,11 @@ pub struct AzureBackupJobResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureBackupJobResource>,
 }
 impl azure_core::Continuable for AzureBackupJobResourceList {
@@ -467,7 +486,11 @@ pub struct AzureBackupRecoveryPointResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureBackupRecoveryPointResource>,
 }
 impl azure_core::Continuable for AzureBackupRecoveryPointResourceList {
@@ -818,7 +841,11 @@ pub struct BackupInstanceResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupInstanceResource>,
 }
 impl azure_core::Continuable for BackupInstanceResourceList {
@@ -1026,7 +1053,11 @@ pub struct BackupVaultResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupVaultResource>,
 }
 impl azure_core::Continuable for BackupVaultResourceList {
@@ -1077,7 +1108,11 @@ pub struct BaseBackupPolicyResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BaseBackupPolicyResource>,
 }
 impl azure_core::Continuable for BaseBackupPolicyResourceList {
@@ -1191,7 +1226,12 @@ impl ClientDiscoveryForProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryForServiceSpecification {
     #[doc = "List of log specifications of this operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<ClientDiscoveryForLogSpecification>,
 }
 impl ClientDiscoveryForServiceSpecification {
@@ -1206,7 +1246,11 @@ pub struct ClientDiscoveryResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientDiscoveryValueForSingleApi>,
 }
 impl azure_core::Continuable for ClientDiscoveryResponse {
@@ -1549,7 +1593,11 @@ impl DppBaseResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DppBaseResourceList {
     #[doc = "List of Dpp resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DppBaseResource>,
     #[doc = "The uri to fetch the next page of resources. Call ListNext() fetches next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1668,7 +1716,12 @@ pub struct DppWorkerRequest {
     pub uri: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub headers: Option<serde_json::Value>,
-    #[serde(rename = "supportedGroupVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedGroupVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_group_versions: Vec<String>,
     #[serde(rename = "cultureInfo", default, skip_serializing_if = "Option::is_none")]
     pub culture_info: Option<String>,
@@ -1686,13 +1739,22 @@ impl DppWorkerRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Error {
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
     #[doc = "The error code."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "The error message."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1824,7 +1886,11 @@ pub struct FeatureValidationResponse {
     #[serde(rename = "featureType", default, skip_serializing_if = "Option::is_none")]
     pub feature_type: Option<feature_validation_response::FeatureType>,
     #[doc = "Response features"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<SupportedFeature>,
 }
 impl FeatureValidationResponse {
@@ -1980,7 +2046,12 @@ pub struct JobExtendedInfo {
     #[serde(rename = "sourceRecoverPoint", default, skip_serializing_if = "Option::is_none")]
     pub source_recover_point: Option<RestoreJobRecoveryPointDetails>,
     #[doc = "List of Sub Tasks of the job"]
-    #[serde(rename = "subTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_tasks: Vec<JobSubTask>,
     #[serde(rename = "targetRecoverPoint", default, skip_serializing_if = "Option::is_none")]
     pub target_recover_point: Option<RestoreJobRecoveryPointDetails>,
@@ -2117,7 +2188,12 @@ impl PolicyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyParameters {
     #[doc = "Gets or sets the DataStore Parameters"]
-    #[serde(rename = "dataStoreParametersList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataStoreParametersList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_store_parameters_list: Vec<DataStoreParameters>,
 }
 impl PolicyParameters {
@@ -2354,10 +2430,20 @@ pub struct ResourceGuard {
     #[serde(rename = "allowAutoApprovals", default, skip_serializing_if = "Option::is_none")]
     pub allow_auto_approvals: Option<bool>,
     #[doc = "{readonly} List of operation details those are protected by the ResourceGuard resource"]
-    #[serde(rename = "resourceGuardOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operations: Vec<ResourceGuardOperation>,
     #[doc = "List of critical operations which are not protected by this resourceGuard"]
-    #[serde(rename = "vaultCriticalOperationExclusionList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultCriticalOperationExclusionList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_critical_operation_exclusion_list: Vec<String>,
     #[doc = "Description about the pre-req steps to perform all the critical operations."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2447,7 +2533,11 @@ pub struct ResourceGuardResourceList {
     #[serde(flatten)]
     pub dpp_tracked_resource_list: DppTrackedResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceGuardResource>,
 }
 impl azure_core::Continuable for ResourceGuardResourceList {
@@ -2647,22 +2737,52 @@ pub struct ScheduleBasedBackupCriteria {
     #[serde(flatten)]
     pub backup_criteria: BackupCriteria,
     #[doc = "it contains absolute values like \"AllBackup\" / \"FirstOfDay\" / \"FirstOfWeek\" / \"FirstOfMonth\"\r\nand should be part of AbsoluteMarker enum"]
-    #[serde(rename = "absoluteCriteria", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "absoluteCriteria",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub absolute_criteria: Vec<String>,
     #[doc = "This is day of the month from 1 to 28 other wise last of month"]
-    #[serde(rename = "daysOfMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_month: Vec<Day>,
     #[doc = "It should be Sunday/Monday/T..../Saturday"]
-    #[serde(rename = "daysOfTheWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_week: Vec<String>,
     #[doc = "It should be January/February/....../December"]
-    #[serde(rename = "monthsOfYear", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthsOfYear",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub months_of_year: Vec<String>,
     #[doc = "List of schedule times for backup"]
-    #[serde(rename = "scheduleTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_times: Vec<time::OffsetDateTime>,
     #[doc = "It should be First/Second/Third/Fourth/Last"]
-    #[serde(rename = "weeksOfTheMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weeksOfTheMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weeks_of_the_month: Vec<String>,
 }
 impl ScheduleBasedBackupCriteria {
@@ -2782,7 +2902,12 @@ pub struct SourceLifeCycle {
     #[doc = "DataStoreInfo base"]
     #[serde(rename = "sourceDataStore")]
     pub source_data_store: DataStoreInfoBase,
-    #[serde(rename = "targetDataStoreCopySettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetDataStoreCopySettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_data_store_copy_settings: Vec<TargetCopySetting>,
 }
 impl SourceLifeCycle {
@@ -2898,7 +3023,12 @@ pub struct SupportedFeature {
     #[serde(rename = "supportStatus", default, skip_serializing_if = "Option::is_none")]
     pub support_status: Option<supported_feature::SupportStatus>,
     #[doc = "support feature type."]
-    #[serde(rename = "exposureControlledFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exposureControlledFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exposure_controlled_features: Vec<String>,
 }
 impl SupportedFeature {
@@ -2958,7 +3088,11 @@ pub mod supported_feature {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct TaggingCriteria {
     #[doc = "Criteria which decides whether the tag can be applied to a triggered backup."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub criteria: Vec<BackupCriteria>,
     #[doc = "Specifies if tag is default."]
     #[serde(rename = "isDefault")]
@@ -3089,7 +3223,11 @@ pub struct UserFacingError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "Additional related Errors"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<UserFacingError>,
     #[doc = "Inner Error"]
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
@@ -3106,7 +3244,12 @@ pub struct UserFacingError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "RecommendedAction � localized."]
-    #[serde(rename = "recommendedAction", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recommendedAction",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommended_action: Vec<String>,
     #[doc = "Target of the error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/dataprotection/src/package_2022_01/models.rs b/services/mgmt/dataprotection/src/package_2022_01/models.rs
index b202fa90cb..0574cd31c7 100644
--- a/services/mgmt/dataprotection/src/package_2022_01/models.rs
+++ b/services/mgmt/dataprotection/src/package_2022_01/models.rs
@@ -87,7 +87,12 @@ pub struct AzureBackupDiscreteRecoveryPoint {
     pub azure_backup_recovery_point: AzureBackupRecoveryPoint,
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
-    #[serde(rename = "recoveryPointDataStoresDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryPointDataStoresDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_point_data_stores_details: Vec<RecoveryPointDataStoreDetails>,
     #[serde(rename = "recoveryPointTime", with = "azure_core::date::rfc3339")]
     pub recovery_point_time: time::OffsetDateTime,
@@ -202,7 +207,12 @@ impl AzureBackupFindRestorableTimeRangesRequestResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureBackupFindRestorableTimeRangesResponse {
     #[doc = "Returns the Restore Ranges available on the Backup Instance."]
-    #[serde(rename = "restorableTimeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restorableTimeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restorable_time_ranges: Vec<RestorableTimeRange>,
     #[serde(rename = "objectType", default, skip_serializing_if = "Option::is_none")]
     pub object_type: Option<String>,
@@ -260,7 +270,12 @@ pub struct AzureBackupJob {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "A List, detailing the errors related to the job"]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<UserFacingError>,
     #[doc = "Extended Information about the job"]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -389,7 +404,11 @@ pub struct AzureBackupJobResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureBackupJobResource>,
 }
 impl azure_core::Continuable for AzureBackupJobResourceList {
@@ -467,7 +486,11 @@ pub struct AzureBackupRecoveryPointResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureBackupRecoveryPointResource>,
 }
 impl azure_core::Continuable for AzureBackupRecoveryPointResourceList {
@@ -863,7 +886,11 @@ pub struct BackupInstanceResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupInstanceResource>,
 }
 impl azure_core::Continuable for BackupInstanceResourceList {
@@ -1071,7 +1098,11 @@ pub struct BackupVaultResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupVaultResource>,
 }
 impl azure_core::Continuable for BackupVaultResourceList {
@@ -1122,7 +1153,11 @@ pub struct BaseBackupPolicyResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BaseBackupPolicyResource>,
 }
 impl azure_core::Continuable for BaseBackupPolicyResourceList {
@@ -1236,7 +1271,12 @@ impl ClientDiscoveryForProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryForServiceSpecification {
     #[doc = "List of log specifications of this operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<ClientDiscoveryForLogSpecification>,
 }
 impl ClientDiscoveryForServiceSpecification {
@@ -1251,7 +1291,11 @@ pub struct ClientDiscoveryResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientDiscoveryValueForSingleApi>,
 }
 impl azure_core::Continuable for ClientDiscoveryResponse {
@@ -1594,7 +1638,11 @@ impl DppBaseResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DppBaseResourceList {
     #[doc = "List of Dpp resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DppBaseResource>,
     #[doc = "The uri to fetch the next page of resources. Call ListNext() fetches next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1713,7 +1761,12 @@ pub struct DppWorkerRequest {
     pub uri: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub headers: Option<serde_json::Value>,
-    #[serde(rename = "supportedGroupVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedGroupVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_group_versions: Vec<String>,
     #[serde(rename = "cultureInfo", default, skip_serializing_if = "Option::is_none")]
     pub culture_info: Option<String>,
@@ -1731,13 +1784,22 @@ impl DppWorkerRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Error {
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
     #[doc = "The error code."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "The error message."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1869,7 +1931,11 @@ pub struct FeatureValidationResponse {
     #[serde(rename = "featureType", default, skip_serializing_if = "Option::is_none")]
     pub feature_type: Option<feature_validation_response::FeatureType>,
     #[doc = "Response features"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<SupportedFeature>,
 }
 impl FeatureValidationResponse {
@@ -2025,7 +2091,12 @@ pub struct JobExtendedInfo {
     #[serde(rename = "sourceRecoverPoint", default, skip_serializing_if = "Option::is_none")]
     pub source_recover_point: Option<RestoreJobRecoveryPointDetails>,
     #[doc = "List of Sub Tasks of the job"]
-    #[serde(rename = "subTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_tasks: Vec<JobSubTask>,
     #[serde(rename = "targetRecoverPoint", default, skip_serializing_if = "Option::is_none")]
     pub target_recover_point: Option<RestoreJobRecoveryPointDetails>,
@@ -2162,7 +2233,12 @@ impl PolicyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyParameters {
     #[doc = "Gets or sets the DataStore Parameters"]
-    #[serde(rename = "dataStoreParametersList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataStoreParametersList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_store_parameters_list: Vec<DataStoreParameters>,
 }
 impl PolicyParameters {
@@ -2399,10 +2475,20 @@ pub struct ResourceGuard {
     #[serde(rename = "allowAutoApprovals", default, skip_serializing_if = "Option::is_none")]
     pub allow_auto_approvals: Option<bool>,
     #[doc = "{readonly} List of operation details those are protected by the ResourceGuard resource"]
-    #[serde(rename = "resourceGuardOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operations: Vec<ResourceGuardOperation>,
     #[doc = "List of critical operations which are not protected by this resourceGuard"]
-    #[serde(rename = "vaultCriticalOperationExclusionList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultCriticalOperationExclusionList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_critical_operation_exclusion_list: Vec<String>,
     #[doc = "Description about the pre-req steps to perform all the critical operations."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2492,7 +2578,11 @@ pub struct ResourceGuardResourceList {
     #[serde(flatten)]
     pub dpp_tracked_resource_list: DppTrackedResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceGuardResource>,
 }
 impl azure_core::Continuable for ResourceGuardResourceList {
@@ -2692,22 +2782,52 @@ pub struct ScheduleBasedBackupCriteria {
     #[serde(flatten)]
     pub backup_criteria: BackupCriteria,
     #[doc = "it contains absolute values like \"AllBackup\" / \"FirstOfDay\" / \"FirstOfWeek\" / \"FirstOfMonth\"\r\nand should be part of AbsoluteMarker enum"]
-    #[serde(rename = "absoluteCriteria", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "absoluteCriteria",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub absolute_criteria: Vec<String>,
     #[doc = "This is day of the month from 1 to 28 other wise last of month"]
-    #[serde(rename = "daysOfMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_month: Vec<Day>,
     #[doc = "It should be Sunday/Monday/T..../Saturday"]
-    #[serde(rename = "daysOfTheWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_week: Vec<String>,
     #[doc = "It should be January/February/....../December"]
-    #[serde(rename = "monthsOfYear", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthsOfYear",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub months_of_year: Vec<String>,
     #[doc = "List of schedule times for backup"]
-    #[serde(rename = "scheduleTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_times: Vec<time::OffsetDateTime>,
     #[doc = "It should be First/Second/Third/Fourth/Last"]
-    #[serde(rename = "weeksOfTheMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weeksOfTheMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weeks_of_the_month: Vec<String>,
 }
 impl ScheduleBasedBackupCriteria {
@@ -2831,7 +2951,12 @@ pub struct SourceLifeCycle {
     #[doc = "DataStoreInfo base"]
     #[serde(rename = "sourceDataStore")]
     pub source_data_store: DataStoreInfoBase,
-    #[serde(rename = "targetDataStoreCopySettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetDataStoreCopySettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_data_store_copy_settings: Vec<TargetCopySetting>,
 }
 impl SourceLifeCycle {
@@ -2947,7 +3072,12 @@ pub struct SupportedFeature {
     #[serde(rename = "supportStatus", default, skip_serializing_if = "Option::is_none")]
     pub support_status: Option<supported_feature::SupportStatus>,
     #[doc = "support feature type."]
-    #[serde(rename = "exposureControlledFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exposureControlledFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exposure_controlled_features: Vec<String>,
 }
 impl SupportedFeature {
@@ -3059,7 +3189,11 @@ pub mod sync_backup_instance_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct TaggingCriteria {
     #[doc = "Criteria which decides whether the tag can be applied to a triggered backup."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub criteria: Vec<BackupCriteria>,
     #[doc = "Specifies if tag is default."]
     #[serde(rename = "isDefault")]
@@ -3190,7 +3324,11 @@ pub struct UserFacingError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "Additional related Errors"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<UserFacingError>,
     #[doc = "Inner Error"]
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
@@ -3207,7 +3345,12 @@ pub struct UserFacingError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "RecommendedAction � localized."]
-    #[serde(rename = "recommendedAction", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recommendedAction",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommended_action: Vec<String>,
     #[doc = "Target of the error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/dataprotection/src/package_2022_03/models.rs b/services/mgmt/dataprotection/src/package_2022_03/models.rs
index 7029d6bc9b..c67c53e645 100644
--- a/services/mgmt/dataprotection/src/package_2022_03/models.rs
+++ b/services/mgmt/dataprotection/src/package_2022_03/models.rs
@@ -87,7 +87,12 @@ pub struct AzureBackupDiscreteRecoveryPoint {
     pub azure_backup_recovery_point: AzureBackupRecoveryPoint,
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
-    #[serde(rename = "recoveryPointDataStoresDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryPointDataStoresDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_point_data_stores_details: Vec<RecoveryPointDataStoreDetails>,
     #[serde(rename = "recoveryPointTime", with = "azure_core::date::rfc3339")]
     pub recovery_point_time: time::OffsetDateTime,
@@ -202,7 +207,12 @@ impl AzureBackupFindRestorableTimeRangesRequestResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureBackupFindRestorableTimeRangesResponse {
     #[doc = "Returns the Restore Ranges available on the Backup Instance."]
-    #[serde(rename = "restorableTimeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restorableTimeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restorable_time_ranges: Vec<RestorableTimeRange>,
     #[serde(rename = "objectType", default, skip_serializing_if = "Option::is_none")]
     pub object_type: Option<String>,
@@ -260,7 +270,12 @@ pub struct AzureBackupJob {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "A List, detailing the errors related to the job"]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<UserFacingError>,
     #[doc = "Extended Information about the job"]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -389,7 +404,11 @@ pub struct AzureBackupJobResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureBackupJobResource>,
 }
 impl azure_core::Continuable for AzureBackupJobResourceList {
@@ -467,7 +486,11 @@ pub struct AzureBackupRecoveryPointResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureBackupRecoveryPointResource>,
 }
 impl azure_core::Continuable for AzureBackupRecoveryPointResourceList {
@@ -863,7 +886,11 @@ pub struct BackupInstanceResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupInstanceResource>,
 }
 impl azure_core::Continuable for BackupInstanceResourceList {
@@ -1071,7 +1098,11 @@ pub struct BackupVaultResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupVaultResource>,
 }
 impl azure_core::Continuable for BackupVaultResourceList {
@@ -1122,7 +1153,11 @@ pub struct BaseBackupPolicyResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BaseBackupPolicyResource>,
 }
 impl azure_core::Continuable for BaseBackupPolicyResourceList {
@@ -1236,7 +1271,12 @@ impl ClientDiscoveryForProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryForServiceSpecification {
     #[doc = "List of log specifications of this operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<ClientDiscoveryForLogSpecification>,
 }
 impl ClientDiscoveryForServiceSpecification {
@@ -1251,7 +1291,11 @@ pub struct ClientDiscoveryResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientDiscoveryValueForSingleApi>,
 }
 impl azure_core::Continuable for ClientDiscoveryResponse {
@@ -1594,7 +1638,11 @@ impl DppBaseResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DppBaseResourceList {
     #[doc = "List of Dpp resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DppBaseResource>,
     #[doc = "The uri to fetch the next page of resources. Call ListNext() fetches next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1713,7 +1761,12 @@ pub struct DppWorkerRequest {
     pub uri: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub headers: Option<serde_json::Value>,
-    #[serde(rename = "supportedGroupVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedGroupVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_group_versions: Vec<String>,
     #[serde(rename = "cultureInfo", default, skip_serializing_if = "Option::is_none")]
     pub culture_info: Option<String>,
@@ -1731,13 +1784,22 @@ impl DppWorkerRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Error {
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
     #[doc = "The error code."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "The error message."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1869,7 +1931,11 @@ pub struct FeatureValidationResponse {
     #[serde(rename = "featureType", default, skip_serializing_if = "Option::is_none")]
     pub feature_type: Option<feature_validation_response::FeatureType>,
     #[doc = "Response features"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<SupportedFeature>,
 }
 impl FeatureValidationResponse {
@@ -2025,7 +2091,12 @@ pub struct JobExtendedInfo {
     #[serde(rename = "sourceRecoverPoint", default, skip_serializing_if = "Option::is_none")]
     pub source_recover_point: Option<RestoreJobRecoveryPointDetails>,
     #[doc = "List of Sub Tasks of the job"]
-    #[serde(rename = "subTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_tasks: Vec<JobSubTask>,
     #[serde(rename = "targetRecoverPoint", default, skip_serializing_if = "Option::is_none")]
     pub target_recover_point: Option<RestoreJobRecoveryPointDetails>,
@@ -2204,7 +2275,12 @@ impl PolicyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyParameters {
     #[doc = "Gets or sets the DataStore Parameters"]
-    #[serde(rename = "dataStoreParametersList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataStoreParametersList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_store_parameters_list: Vec<DataStoreParameters>,
 }
 impl PolicyParameters {
@@ -2441,10 +2517,20 @@ pub struct ResourceGuard {
     #[serde(rename = "allowAutoApprovals", default, skip_serializing_if = "Option::is_none")]
     pub allow_auto_approvals: Option<bool>,
     #[doc = "{readonly} List of operation details those are protected by the ResourceGuard resource"]
-    #[serde(rename = "resourceGuardOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operations: Vec<ResourceGuardOperation>,
     #[doc = "List of critical operations which are not protected by this resourceGuard"]
-    #[serde(rename = "vaultCriticalOperationExclusionList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultCriticalOperationExclusionList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_critical_operation_exclusion_list: Vec<String>,
     #[doc = "Description about the pre-req steps to perform all the critical operations."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2534,7 +2620,11 @@ pub struct ResourceGuardResourceList {
     #[serde(flatten)]
     pub dpp_tracked_resource_list: DppTrackedResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceGuardResource>,
 }
 impl azure_core::Continuable for ResourceGuardResourceList {
@@ -2734,22 +2824,52 @@ pub struct ScheduleBasedBackupCriteria {
     #[serde(flatten)]
     pub backup_criteria: BackupCriteria,
     #[doc = "it contains absolute values like \"AllBackup\" / \"FirstOfDay\" / \"FirstOfWeek\" / \"FirstOfMonth\"\r\nand should be part of AbsoluteMarker enum"]
-    #[serde(rename = "absoluteCriteria", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "absoluteCriteria",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub absolute_criteria: Vec<String>,
     #[doc = "This is day of the month from 1 to 28 other wise last of month"]
-    #[serde(rename = "daysOfMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_month: Vec<Day>,
     #[doc = "It should be Sunday/Monday/T..../Saturday"]
-    #[serde(rename = "daysOfTheWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_week: Vec<String>,
     #[doc = "It should be January/February/....../December"]
-    #[serde(rename = "monthsOfYear", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthsOfYear",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub months_of_year: Vec<String>,
     #[doc = "List of schedule times for backup"]
-    #[serde(rename = "scheduleTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_times: Vec<time::OffsetDateTime>,
     #[doc = "It should be First/Second/Third/Fourth/Last"]
-    #[serde(rename = "weeksOfTheMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weeksOfTheMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weeks_of_the_month: Vec<String>,
 }
 impl ScheduleBasedBackupCriteria {
@@ -2873,7 +2993,12 @@ pub struct SourceLifeCycle {
     #[doc = "DataStoreInfo base"]
     #[serde(rename = "sourceDataStore")]
     pub source_data_store: DataStoreInfoBase,
-    #[serde(rename = "targetDataStoreCopySettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetDataStoreCopySettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_data_store_copy_settings: Vec<TargetCopySetting>,
 }
 impl SourceLifeCycle {
@@ -2989,7 +3114,12 @@ pub struct SupportedFeature {
     #[serde(rename = "supportStatus", default, skip_serializing_if = "Option::is_none")]
     pub support_status: Option<supported_feature::SupportStatus>,
     #[doc = "support feature type."]
-    #[serde(rename = "exposureControlledFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exposureControlledFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exposure_controlled_features: Vec<String>,
 }
 impl SupportedFeature {
@@ -3101,7 +3231,11 @@ pub mod sync_backup_instance_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct TaggingCriteria {
     #[doc = "Criteria which decides whether the tag can be applied to a triggered backup."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub criteria: Vec<BackupCriteria>,
     #[doc = "Specifies if tag is default."]
     #[serde(rename = "isDefault")]
@@ -3232,7 +3366,11 @@ pub struct UserFacingError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "Additional related Errors"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<UserFacingError>,
     #[doc = "Inner Error"]
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
@@ -3249,7 +3387,12 @@ pub struct UserFacingError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "RecommendedAction � localized."]
-    #[serde(rename = "recommendedAction", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recommendedAction",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommended_action: Vec<String>,
     #[doc = "Target of the error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/dataprotection/src/package_2022_04/models.rs b/services/mgmt/dataprotection/src/package_2022_04/models.rs
index a84df3a09e..b25dab4859 100644
--- a/services/mgmt/dataprotection/src/package_2022_04/models.rs
+++ b/services/mgmt/dataprotection/src/package_2022_04/models.rs
@@ -87,7 +87,12 @@ pub struct AzureBackupDiscreteRecoveryPoint {
     pub azure_backup_recovery_point: AzureBackupRecoveryPoint,
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
-    #[serde(rename = "recoveryPointDataStoresDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryPointDataStoresDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_point_data_stores_details: Vec<RecoveryPointDataStoreDetails>,
     #[serde(rename = "recoveryPointTime", with = "azure_core::date::rfc3339")]
     pub recovery_point_time: time::OffsetDateTime,
@@ -202,7 +207,12 @@ impl AzureBackupFindRestorableTimeRangesRequestResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureBackupFindRestorableTimeRangesResponse {
     #[doc = "Returns the Restore Ranges available on the Backup Instance."]
-    #[serde(rename = "restorableTimeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restorableTimeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restorable_time_ranges: Vec<RestorableTimeRange>,
     #[serde(rename = "objectType", default, skip_serializing_if = "Option::is_none")]
     pub object_type: Option<String>,
@@ -260,7 +270,12 @@ pub struct AzureBackupJob {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "A List, detailing the errors related to the job"]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<UserFacingError>,
     #[doc = "Extended Information about the job"]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -389,7 +404,11 @@ pub struct AzureBackupJobResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureBackupJobResource>,
 }
 impl azure_core::Continuable for AzureBackupJobResourceList {
@@ -467,7 +486,11 @@ pub struct AzureBackupRecoveryPointResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureBackupRecoveryPointResource>,
 }
 impl azure_core::Continuable for AzureBackupRecoveryPointResourceList {
@@ -913,7 +936,11 @@ pub struct BackupInstanceResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupInstanceResource>,
 }
 impl azure_core::Continuable for BackupInstanceResourceList {
@@ -1125,7 +1152,11 @@ pub struct BackupVaultResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupVaultResource>,
 }
 impl azure_core::Continuable for BackupVaultResourceList {
@@ -1176,7 +1207,11 @@ pub struct BaseBackupPolicyResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BaseBackupPolicyResource>,
 }
 impl azure_core::Continuable for BaseBackupPolicyResourceList {
@@ -1290,7 +1325,12 @@ impl ClientDiscoveryForProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryForServiceSpecification {
     #[doc = "List of log specifications of this operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<ClientDiscoveryForLogSpecification>,
 }
 impl ClientDiscoveryForServiceSpecification {
@@ -1305,7 +1345,11 @@ pub struct ClientDiscoveryResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientDiscoveryValueForSingleApi>,
 }
 impl azure_core::Continuable for ClientDiscoveryResponse {
@@ -1648,7 +1692,11 @@ impl DppBaseResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DppBaseResourceList {
     #[doc = "List of Dpp resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DppBaseResource>,
     #[doc = "The uri to fetch the next page of resources. Call ListNext() fetches next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1767,7 +1815,12 @@ pub struct DppWorkerRequest {
     pub uri: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub headers: Option<serde_json::Value>,
-    #[serde(rename = "supportedGroupVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedGroupVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_group_versions: Vec<String>,
     #[serde(rename = "cultureInfo", default, skip_serializing_if = "Option::is_none")]
     pub culture_info: Option<String>,
@@ -1785,13 +1838,22 @@ impl DppWorkerRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Error {
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
     #[doc = "The error code."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "The error message."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1923,7 +1985,11 @@ pub struct FeatureValidationResponse {
     #[serde(rename = "featureType", default, skip_serializing_if = "Option::is_none")]
     pub feature_type: Option<feature_validation_response::FeatureType>,
     #[doc = "Response features"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<SupportedFeature>,
 }
 impl FeatureValidationResponse {
@@ -2079,7 +2145,12 @@ pub struct JobExtendedInfo {
     #[serde(rename = "sourceRecoverPoint", default, skip_serializing_if = "Option::is_none")]
     pub source_recover_point: Option<RestoreJobRecoveryPointDetails>,
     #[doc = "List of Sub Tasks of the job"]
-    #[serde(rename = "subTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_tasks: Vec<JobSubTask>,
     #[serde(rename = "targetRecoverPoint", default, skip_serializing_if = "Option::is_none")]
     pub target_recover_point: Option<RestoreJobRecoveryPointDetails>,
@@ -2285,7 +2356,12 @@ impl PolicyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyParameters {
     #[doc = "Gets or sets the DataStore Parameters"]
-    #[serde(rename = "dataStoreParametersList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataStoreParametersList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_store_parameters_list: Vec<DataStoreParameters>,
 }
 impl PolicyParameters {
@@ -2522,10 +2598,20 @@ pub struct ResourceGuard {
     #[serde(rename = "allowAutoApprovals", default, skip_serializing_if = "Option::is_none")]
     pub allow_auto_approvals: Option<bool>,
     #[doc = "{readonly} List of operation details those are protected by the ResourceGuard resource"]
-    #[serde(rename = "resourceGuardOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operations: Vec<ResourceGuardOperation>,
     #[doc = "List of critical operations which are not protected by this resourceGuard"]
-    #[serde(rename = "vaultCriticalOperationExclusionList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultCriticalOperationExclusionList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_critical_operation_exclusion_list: Vec<String>,
     #[doc = "Description about the pre-req steps to perform all the critical operations."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2615,7 +2701,11 @@ pub struct ResourceGuardResourceList {
     #[serde(flatten)]
     pub dpp_tracked_resource_list: DppTrackedResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceGuardResource>,
 }
 impl azure_core::Continuable for ResourceGuardResourceList {
@@ -2815,22 +2905,52 @@ pub struct ScheduleBasedBackupCriteria {
     #[serde(flatten)]
     pub backup_criteria: BackupCriteria,
     #[doc = "it contains absolute values like \"AllBackup\" / \"FirstOfDay\" / \"FirstOfWeek\" / \"FirstOfMonth\"\r\nand should be part of AbsoluteMarker enum"]
-    #[serde(rename = "absoluteCriteria", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "absoluteCriteria",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub absolute_criteria: Vec<String>,
     #[doc = "This is day of the month from 1 to 28 other wise last of month"]
-    #[serde(rename = "daysOfMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_month: Vec<Day>,
     #[doc = "It should be Sunday/Monday/T..../Saturday"]
-    #[serde(rename = "daysOfTheWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_week: Vec<String>,
     #[doc = "It should be January/February/....../December"]
-    #[serde(rename = "monthsOfYear", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthsOfYear",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub months_of_year: Vec<String>,
     #[doc = "List of schedule times for backup"]
-    #[serde(rename = "scheduleTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_times: Vec<time::OffsetDateTime>,
     #[doc = "It should be First/Second/Third/Fourth/Last"]
-    #[serde(rename = "weeksOfTheMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weeksOfTheMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weeks_of_the_month: Vec<String>,
 }
 impl ScheduleBasedBackupCriteria {
@@ -2954,7 +3074,12 @@ pub struct SourceLifeCycle {
     #[doc = "DataStoreInfo base"]
     #[serde(rename = "sourceDataStore")]
     pub source_data_store: DataStoreInfoBase,
-    #[serde(rename = "targetDataStoreCopySettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetDataStoreCopySettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_data_store_copy_settings: Vec<TargetCopySetting>,
 }
 impl SourceLifeCycle {
@@ -3070,7 +3195,12 @@ pub struct SupportedFeature {
     #[serde(rename = "supportStatus", default, skip_serializing_if = "Option::is_none")]
     pub support_status: Option<supported_feature::SupportStatus>,
     #[doc = "support feature type."]
-    #[serde(rename = "exposureControlledFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exposureControlledFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exposure_controlled_features: Vec<String>,
 }
 impl SupportedFeature {
@@ -3182,7 +3312,11 @@ pub mod sync_backup_instance_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct TaggingCriteria {
     #[doc = "Criteria which decides whether the tag can be applied to a triggered backup."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub criteria: Vec<BackupCriteria>,
     #[doc = "Specifies if tag is default."]
     #[serde(rename = "isDefault")]
@@ -3313,7 +3447,11 @@ pub struct UserFacingError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "Additional related Errors"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<UserFacingError>,
     #[doc = "Inner Error"]
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
@@ -3330,7 +3468,12 @@ pub struct UserFacingError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "RecommendedAction � localized."]
-    #[serde(rename = "recommendedAction", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recommendedAction",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommended_action: Vec<String>,
     #[doc = "Target of the error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/dataprotection/src/package_2022_05/models.rs b/services/mgmt/dataprotection/src/package_2022_05/models.rs
index 0d2278e42c..a6c105b306 100644
--- a/services/mgmt/dataprotection/src/package_2022_05/models.rs
+++ b/services/mgmt/dataprotection/src/package_2022_05/models.rs
@@ -87,7 +87,12 @@ pub struct AzureBackupDiscreteRecoveryPoint {
     pub azure_backup_recovery_point: AzureBackupRecoveryPoint,
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
-    #[serde(rename = "recoveryPointDataStoresDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryPointDataStoresDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_point_data_stores_details: Vec<RecoveryPointDataStoreDetails>,
     #[serde(rename = "recoveryPointTime", with = "azure_core::date::rfc3339")]
     pub recovery_point_time: time::OffsetDateTime,
@@ -202,7 +207,12 @@ impl AzureBackupFindRestorableTimeRangesRequestResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureBackupFindRestorableTimeRangesResponse {
     #[doc = "Returns the Restore Ranges available on the Backup Instance."]
-    #[serde(rename = "restorableTimeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restorableTimeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restorable_time_ranges: Vec<RestorableTimeRange>,
     #[serde(rename = "objectType", default, skip_serializing_if = "Option::is_none")]
     pub object_type: Option<String>,
@@ -260,7 +270,12 @@ pub struct AzureBackupJob {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "A List, detailing the errors related to the job"]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<UserFacingError>,
     #[doc = "Extended Information about the job"]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -389,7 +404,11 @@ pub struct AzureBackupJobResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureBackupJobResource>,
 }
 impl azure_core::Continuable for AzureBackupJobResourceList {
@@ -467,7 +486,11 @@ pub struct AzureBackupRecoveryPointResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureBackupRecoveryPointResource>,
 }
 impl azure_core::Continuable for AzureBackupRecoveryPointResourceList {
@@ -913,7 +936,11 @@ pub struct BackupInstanceResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupInstanceResource>,
 }
 impl azure_core::Continuable for BackupInstanceResourceList {
@@ -1129,7 +1156,11 @@ pub struct BackupVaultResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupVaultResource>,
 }
 impl azure_core::Continuable for BackupVaultResourceList {
@@ -1180,7 +1211,11 @@ pub struct BaseBackupPolicyResourceList {
     #[serde(flatten)]
     pub dpp_resource_list: DppResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BaseBackupPolicyResource>,
 }
 impl azure_core::Continuable for BaseBackupPolicyResourceList {
@@ -1294,7 +1329,12 @@ impl ClientDiscoveryForProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryForServiceSpecification {
     #[doc = "List of log specifications of this operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<ClientDiscoveryForLogSpecification>,
 }
 impl ClientDiscoveryForServiceSpecification {
@@ -1309,7 +1349,11 @@ pub struct ClientDiscoveryResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientDiscoveryValueForSingleApi>,
 }
 impl azure_core::Continuable for ClientDiscoveryResponse {
@@ -1652,7 +1696,11 @@ impl DppBaseResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DppBaseResourceList {
     #[doc = "List of Dpp resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DppBaseResource>,
     #[doc = "The uri to fetch the next page of resources. Call ListNext() fetches next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1794,7 +1842,12 @@ pub struct DppWorkerRequest {
     pub uri: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub headers: Option<serde_json::Value>,
-    #[serde(rename = "supportedGroupVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedGroupVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_group_versions: Vec<String>,
     #[serde(rename = "cultureInfo", default, skip_serializing_if = "Option::is_none")]
     pub culture_info: Option<String>,
@@ -1812,13 +1865,22 @@ impl DppWorkerRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Error {
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
     #[doc = "The error code."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "The error message."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1950,7 +2012,11 @@ pub struct FeatureValidationResponse {
     #[serde(rename = "featureType", default, skip_serializing_if = "Option::is_none")]
     pub feature_type: Option<feature_validation_response::FeatureType>,
     #[doc = "Response features"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<SupportedFeature>,
 }
 impl FeatureValidationResponse {
@@ -2106,7 +2172,12 @@ pub struct JobExtendedInfo {
     #[serde(rename = "sourceRecoverPoint", default, skip_serializing_if = "Option::is_none")]
     pub source_recover_point: Option<RestoreJobRecoveryPointDetails>,
     #[doc = "List of Sub Tasks of the job"]
-    #[serde(rename = "subTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_tasks: Vec<JobSubTask>,
     #[serde(rename = "targetRecoverPoint", default, skip_serializing_if = "Option::is_none")]
     pub target_recover_point: Option<RestoreJobRecoveryPointDetails>,
@@ -2312,7 +2383,12 @@ impl PolicyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyParameters {
     #[doc = "Gets or sets the DataStore Parameters"]
-    #[serde(rename = "dataStoreParametersList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataStoreParametersList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_store_parameters_list: Vec<DataStoreParameters>,
 }
 impl PolicyParameters {
@@ -2549,10 +2625,20 @@ pub struct ResourceGuard {
     #[serde(rename = "allowAutoApprovals", default, skip_serializing_if = "Option::is_none")]
     pub allow_auto_approvals: Option<bool>,
     #[doc = "{readonly} List of operation details those are protected by the ResourceGuard resource"]
-    #[serde(rename = "resourceGuardOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operations: Vec<ResourceGuardOperation>,
     #[doc = "List of critical operations which are not protected by this resourceGuard"]
-    #[serde(rename = "vaultCriticalOperationExclusionList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultCriticalOperationExclusionList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_critical_operation_exclusion_list: Vec<String>,
     #[doc = "Description about the pre-req steps to perform all the critical operations."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2642,7 +2728,11 @@ pub struct ResourceGuardResourceList {
     #[serde(flatten)]
     pub dpp_tracked_resource_list: DppTrackedResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceGuardResource>,
 }
 impl azure_core::Continuable for ResourceGuardResourceList {
@@ -2842,22 +2932,52 @@ pub struct ScheduleBasedBackupCriteria {
     #[serde(flatten)]
     pub backup_criteria: BackupCriteria,
     #[doc = "it contains absolute values like \"AllBackup\" / \"FirstOfDay\" / \"FirstOfWeek\" / \"FirstOfMonth\"\r\nand should be part of AbsoluteMarker enum"]
-    #[serde(rename = "absoluteCriteria", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "absoluteCriteria",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub absolute_criteria: Vec<String>,
     #[doc = "This is day of the month from 1 to 28 other wise last of month"]
-    #[serde(rename = "daysOfMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_month: Vec<Day>,
     #[doc = "It should be Sunday/Monday/T..../Saturday"]
-    #[serde(rename = "daysOfTheWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_week: Vec<String>,
     #[doc = "It should be January/February/....../December"]
-    #[serde(rename = "monthsOfYear", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthsOfYear",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub months_of_year: Vec<String>,
     #[doc = "List of schedule times for backup"]
-    #[serde(rename = "scheduleTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_times: Vec<time::OffsetDateTime>,
     #[doc = "It should be First/Second/Third/Fourth/Last"]
-    #[serde(rename = "weeksOfTheMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weeksOfTheMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weeks_of_the_month: Vec<String>,
 }
 impl ScheduleBasedBackupCriteria {
@@ -2981,7 +3101,12 @@ pub struct SourceLifeCycle {
     #[doc = "DataStoreInfo base"]
     #[serde(rename = "sourceDataStore")]
     pub source_data_store: DataStoreInfoBase,
-    #[serde(rename = "targetDataStoreCopySettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetDataStoreCopySettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_data_store_copy_settings: Vec<TargetCopySetting>,
 }
 impl SourceLifeCycle {
@@ -3099,7 +3224,12 @@ pub struct SupportedFeature {
     #[serde(rename = "supportStatus", default, skip_serializing_if = "Option::is_none")]
     pub support_status: Option<supported_feature::SupportStatus>,
     #[doc = "support feature type."]
-    #[serde(rename = "exposureControlledFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exposureControlledFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exposure_controlled_features: Vec<String>,
 }
 impl SupportedFeature {
@@ -3211,7 +3341,11 @@ pub mod sync_backup_instance_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct TaggingCriteria {
     #[doc = "Criteria which decides whether the tag can be applied to a triggered backup."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub criteria: Vec<BackupCriteria>,
     #[doc = "Specifies if tag is default."]
     #[serde(rename = "isDefault")]
@@ -3342,7 +3476,11 @@ pub struct UserFacingError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "Additional related Errors"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<UserFacingError>,
     #[doc = "Inner Error"]
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
@@ -3359,7 +3497,12 @@ pub struct UserFacingError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "RecommendedAction � localized."]
-    #[serde(rename = "recommendedAction", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recommendedAction",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommended_action: Vec<String>,
     #[doc = "Target of the error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/datashare/src/package_2018_11_01_preview/models.rs b/services/mgmt/datashare/src/package_2018_11_01_preview/models.rs
index bbd153b343..3490a00c1e 100644
--- a/services/mgmt/datashare/src/package_2018_11_01_preview/models.rs
+++ b/services/mgmt/datashare/src/package_2018_11_01_preview/models.rs
@@ -1949,7 +1949,11 @@ pub struct DataShareErrorInfo {
     #[doc = "Code of the error"]
     pub code: String,
     #[doc = "Nested details of the error model"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<DataShareErrorInfo>,
     #[doc = "Message of the error"]
     pub message: String,
@@ -2642,7 +2646,11 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "properties for dimension"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<DimensionProperties>,
     #[doc = "description of the metric"]
     #[serde(rename = "displayDescription", default, skip_serializing_if = "Option::is_none")]
@@ -2666,10 +2674,20 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "resourceIdDimensionNameOverride", default, skip_serializing_if = "Option::is_none")]
     pub resource_id_dimension_name_override: Option<String>,
     #[doc = "supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "units for the metric"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2696,10 +2714,20 @@ impl OperationMetaPropertyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationMetaServiceSpecification {
     #[doc = "log specifications for the operation"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationMetaLogSpecification>,
     #[doc = "metric specifications for the operation"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetaMetricSpecification>,
 }
 impl OperationMetaServiceSpecification {
diff --git a/services/mgmt/datashare/src/package_2019_11_01/models.rs b/services/mgmt/datashare/src/package_2019_11_01/models.rs
index 3edd68ddf4..e40e30ece4 100644
--- a/services/mgmt/datashare/src/package_2019_11_01/models.rs
+++ b/services/mgmt/datashare/src/package_2019_11_01/models.rs
@@ -1949,7 +1949,11 @@ pub struct DataShareErrorInfo {
     #[doc = "Code of the error"]
     pub code: String,
     #[doc = "Nested details of the error model"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<DataShareErrorInfo>,
     #[doc = "Message of the error"]
     pub message: String,
@@ -2710,7 +2714,11 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "properties for dimension"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<DimensionProperties>,
     #[doc = "description of the metric"]
     #[serde(rename = "displayDescription", default, skip_serializing_if = "Option::is_none")]
@@ -2734,10 +2742,20 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "resourceIdDimensionNameOverride", default, skip_serializing_if = "Option::is_none")]
     pub resource_id_dimension_name_override: Option<String>,
     #[doc = "supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "units for the metric"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2764,10 +2782,20 @@ impl OperationMetaPropertyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationMetaServiceSpecification {
     #[doc = "log specifications for the operation"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationMetaLogSpecification>,
     #[doc = "metric specifications for the operation"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetaMetricSpecification>,
 }
 impl OperationMetaServiceSpecification {
diff --git a/services/mgmt/datashare/src/package_2020_09_01/models.rs b/services/mgmt/datashare/src/package_2020_09_01/models.rs
index 0daf125c6a..0d18c4d806 100644
--- a/services/mgmt/datashare/src/package_2020_09_01/models.rs
+++ b/services/mgmt/datashare/src/package_2020_09_01/models.rs
@@ -1961,7 +1961,11 @@ pub struct DataShareErrorInfo {
     #[doc = "Code of the error"]
     pub code: String,
     #[doc = "Nested details of the error model"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<DataShareErrorInfo>,
     #[doc = "Message of the error"]
     pub message: String,
@@ -2725,7 +2729,11 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "properties for dimension"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<DimensionProperties>,
     #[doc = "description of the metric"]
     #[serde(rename = "displayDescription", default, skip_serializing_if = "Option::is_none")]
@@ -2749,10 +2757,20 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "resourceIdDimensionNameOverride", default, skip_serializing_if = "Option::is_none")]
     pub resource_id_dimension_name_override: Option<String>,
     #[doc = "supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "units for the metric"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2779,10 +2797,20 @@ impl OperationMetaPropertyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationMetaServiceSpecification {
     #[doc = "log specifications for the operation"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationMetaLogSpecification>,
     #[doc = "metric specifications for the operation"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetaMetricSpecification>,
 }
 impl OperationMetaServiceSpecification {
diff --git a/services/mgmt/datashare/src/package_2020_10_01_preview/models.rs b/services/mgmt/datashare/src/package_2020_10_01_preview/models.rs
index dd33537c7a..2e5f57c4f5 100644
--- a/services/mgmt/datashare/src/package_2020_10_01_preview/models.rs
+++ b/services/mgmt/datashare/src/package_2020_10_01_preview/models.rs
@@ -2373,7 +2373,11 @@ pub struct DataShareErrorInfo {
     #[doc = "Code of the error"]
     pub code: String,
     #[doc = "Nested details of the error model"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<DataShareErrorInfo>,
     #[doc = "Message of the error"]
     pub message: String,
@@ -3069,7 +3073,11 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "properties for dimension"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<DimensionProperties>,
     #[doc = "description of the metric"]
     #[serde(rename = "displayDescription", default, skip_serializing_if = "Option::is_none")]
@@ -3093,10 +3101,20 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "resourceIdDimensionNameOverride", default, skip_serializing_if = "Option::is_none")]
     pub resource_id_dimension_name_override: Option<String>,
     #[doc = "supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "units for the metric"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3123,10 +3141,20 @@ impl OperationMetaPropertyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationMetaServiceSpecification {
     #[doc = "log specifications for the operation"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationMetaLogSpecification>,
     #[doc = "metric specifications for the operation"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetaMetricSpecification>,
 }
 impl OperationMetaServiceSpecification {
diff --git a/services/mgmt/datashare/src/package_2021_08_01/models.rs b/services/mgmt/datashare/src/package_2021_08_01/models.rs
index 3147c1e15c..e9f3770f33 100644
--- a/services/mgmt/datashare/src/package_2021_08_01/models.rs
+++ b/services/mgmt/datashare/src/package_2021_08_01/models.rs
@@ -1967,7 +1967,11 @@ pub struct DataShareErrorInfo {
     #[doc = "Code of the error"]
     pub code: String,
     #[doc = "Nested details of the error model"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<DataShareErrorInfo>,
     #[doc = "Message of the error"]
     pub message: String,
@@ -2949,7 +2953,11 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "properties for dimension"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<DimensionProperties>,
     #[doc = "description of the metric"]
     #[serde(rename = "displayDescription", default, skip_serializing_if = "Option::is_none")]
@@ -2973,10 +2981,20 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "resourceIdDimensionNameOverride", default, skip_serializing_if = "Option::is_none")]
     pub resource_id_dimension_name_override: Option<String>,
     #[doc = "supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "units for the metric"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3003,10 +3021,20 @@ impl OperationMetaPropertyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationMetaServiceSpecification {
     #[doc = "log specifications for the operation"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationMetaLogSpecification>,
     #[doc = "metric specifications for the operation"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetaMetricSpecification>,
 }
 impl OperationMetaServiceSpecification {
@@ -5246,22 +5274,52 @@ pub mod system_data {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TableLevelSharingProperties {
     #[doc = "External tables to be excluded in the data set"]
-    #[serde(rename = "externalTablesToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalTablesToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_tables_to_exclude: Vec<String>,
     #[doc = "External tables to be included in the data set"]
-    #[serde(rename = "externalTablesToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalTablesToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_tables_to_include: Vec<String>,
     #[doc = "Materialized views to be excluded in the data set"]
-    #[serde(rename = "materializedViewsToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "materializedViewsToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub materialized_views_to_exclude: Vec<String>,
     #[doc = "Materialized views to be included in the data set"]
-    #[serde(rename = "materializedViewsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "materializedViewsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub materialized_views_to_include: Vec<String>,
     #[doc = "Tables to be excluded in the data set"]
-    #[serde(rename = "tablesToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tablesToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables_to_exclude: Vec<String>,
     #[doc = "Tables to be included in the data set"]
-    #[serde(rename = "tablesToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tablesToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables_to_include: Vec<String>,
 }
 impl TableLevelSharingProperties {
diff --git a/services/mgmt/deploymentmanager/src/package_2019_11_01_preview/models.rs b/services/mgmt/deploymentmanager/src/package_2019_11_01_preview/models.rs
index cae5d5228b..e85cf473b1 100644
--- a/services/mgmt/deploymentmanager/src/package_2019_11_01_preview/models.rs
+++ b/services/mgmt/deploymentmanager/src/package_2019_11_01_preview/models.rs
@@ -116,7 +116,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "More detailed error information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -411,7 +415,12 @@ pub mod rest_request_authentication {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestResponse {
     #[doc = "The HTTP status codes expected in a successful health check response. The response is expected to match one of the given status codes. If no expected status codes are provided, default expected status code is 200 OK."]
-    #[serde(rename = "successStatusCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "successStatusCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub success_status_codes: Vec<String>,
     #[doc = "The regular expressions to match the response content with."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -428,7 +437,11 @@ pub mod rest_response {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Regex {
         #[doc = "The list of regular expressions."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub matches: Vec<String>,
         #[doc = "Indicates whether any or all of the expressions should match with the response content."]
         #[serde(rename = "matchQuantifier", default, skip_serializing_if = "Option::is_none")]
@@ -521,7 +534,11 @@ pub struct RolloutProperties {
     #[serde(rename = "operationInfo", default, skip_serializing_if = "Option::is_none")]
     pub operation_info: Option<RolloutOperationInfo>,
     #[doc = "The detailed information on the services being deployed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub services: Vec<Service>,
 }
 impl RolloutProperties {
@@ -589,10 +606,19 @@ pub struct RolloutStep {
     #[serde(rename = "operationInfo", default, skip_serializing_if = "Option::is_none")]
     pub operation_info: Option<StepOperationInfo>,
     #[doc = "Set of resource operations that were performed, if any, on an Azure resource."]
-    #[serde(rename = "resourceOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_operations: Vec<ResourceOperation>,
     #[doc = "Supplementary informative messages during rollout."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub messages: Vec<Message>,
 }
 impl RolloutStep {
@@ -645,7 +671,12 @@ pub struct Service {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The detailed information about the units that make up the service."]
-    #[serde(rename = "serviceUnits", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceUnits",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_units: Vec<ServiceUnit>,
 }
 impl Service {
@@ -730,7 +761,11 @@ pub struct ServiceUnit {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Detailed step information, if present."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub steps: Vec<RolloutStep>,
 }
 impl ServiceUnit {
@@ -817,16 +852,31 @@ pub struct StepGroup {
     #[doc = "The name of the step group."]
     pub name: String,
     #[doc = "The list of step group names on which this step group depends on."]
-    #[serde(rename = "dependsOnStepGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOnStepGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on_step_groups: Vec<String>,
     #[doc = "The list of steps to be run before deploying the target."]
-    #[serde(rename = "preDeploymentSteps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preDeploymentSteps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pre_deployment_steps: Vec<PrePostStep>,
     #[doc = "The resource Id of service unit to be deployed. The service unit should be from the service topology referenced in targetServiceTopologyId"]
     #[serde(rename = "deploymentTargetId")]
     pub deployment_target_id: String,
     #[doc = "The list of steps to be run after deploying the target."]
-    #[serde(rename = "postDeploymentSteps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "postDeploymentSteps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub post_deployment_steps: Vec<PrePostStep>,
 }
 impl StepGroup {
diff --git a/services/mgmt/desktopvirtualization/src/package_2021_04_01_preview/models.rs b/services/mgmt/desktopvirtualization/src/package_2021_04_01_preview/models.rs
index 453456cebd..c0dab39250 100644
--- a/services/mgmt/desktopvirtualization/src/package_2021_04_01_preview/models.rs
+++ b/services/mgmt/desktopvirtualization/src/package_2021_04_01_preview/models.rs
@@ -39,7 +39,11 @@ impl ApplicationGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGroupList {
     #[doc = "List of ApplicationGroup definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationGroup>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -174,7 +178,11 @@ pub mod application_group_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationList {
     #[doc = "List of Application definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -520,7 +528,11 @@ impl Desktop {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DesktopList {
     #[doc = "List of Desktop definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Desktop>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -603,7 +615,11 @@ impl ExpandMsixImage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpandMsixImageList {
     #[doc = "List of MSIX package properties from give MSIX Image."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpandMsixImage>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -651,7 +667,12 @@ pub struct ExpandMsixImageProperties {
     #[serde(rename = "isActive", default, skip_serializing_if = "Option::is_none")]
     pub is_active: Option<bool>,
     #[doc = "List of package dependencies. "]
-    #[serde(rename = "packageDependencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageDependencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_dependencies: Vec<MsixPackageDependencies>,
     #[doc = "Package Version found in the appxmanifest.xml. "]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -660,7 +681,12 @@ pub struct ExpandMsixImageProperties {
     #[serde(rename = "lastUpdated", default, with = "azure_core::date::rfc3339::option")]
     pub last_updated: Option<time::OffsetDateTime>,
     #[doc = "List of package applications. "]
-    #[serde(rename = "packageApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_applications: Vec<MsixPackageApplications>,
 }
 impl ExpandMsixImageProperties {
@@ -688,7 +714,11 @@ impl HostPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HostPoolList {
     #[doc = "List of HostPool definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HostPool>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1018,7 +1048,12 @@ pub struct HostPoolProperties {
     #[serde(rename = "vmTemplate", default, skip_serializing_if = "Option::is_none")]
     pub vm_template: Option<String>,
     #[doc = "List of applicationGroup links."]
-    #[serde(rename = "applicationGroupReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGroupReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_group_references: Vec<String>,
     #[doc = "URL to customer ADFS server for signing WVD SSO certificates."]
     #[serde(rename = "ssoadfsAuthority", default, skip_serializing_if = "Option::is_none")]
@@ -1392,7 +1427,11 @@ impl MsixPackage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MsixPackageList {
     #[doc = "List of MSIX Package definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MsixPackage>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1466,7 +1505,12 @@ pub struct MsixPackageProperties {
     #[serde(rename = "isActive", default, skip_serializing_if = "Option::is_none")]
     pub is_active: Option<bool>,
     #[doc = "List of package dependencies. "]
-    #[serde(rename = "packageDependencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageDependencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_dependencies: Vec<MsixPackageDependencies>,
     #[doc = "Package Version found in the appxmanifest.xml. "]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1475,7 +1519,12 @@ pub struct MsixPackageProperties {
     #[serde(rename = "lastUpdated", default, with = "azure_core::date::rfc3339::option")]
     pub last_updated: Option<time::OffsetDateTime>,
     #[doc = "List of package applications. "]
-    #[serde(rename = "packageApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_applications: Vec<MsixPackageApplications>,
 }
 impl MsixPackageProperties {
@@ -1661,7 +1710,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResultWithSystemData {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnectionWithSystemData>,
 }
 impl PrivateEndpointConnectionListResultWithSystemData {
@@ -1803,7 +1856,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -1818,10 +1875,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -2070,7 +2137,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
 }
 impl ResourceProviderOperationList {
@@ -2111,7 +2182,11 @@ impl ScalingPlan {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScalingPlanList {
     #[doc = "List of scaling plan definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScalingPlan>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2162,10 +2237,19 @@ pub struct ScalingPlanPatchProperties {
     #[serde(rename = "exclusionTag", default, skip_serializing_if = "Option::is_none")]
     pub exclusion_tag: Option<String>,
     #[doc = "List of ScalingSchedule definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedules: Vec<ScalingSchedule>,
     #[doc = "List of ScalingHostPoolReference definitions."]
-    #[serde(rename = "hostPoolReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostPoolReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub host_pool_references: Vec<ScalingHostPoolReference>,
 }
 impl ScalingPlanPatchProperties {
@@ -2238,10 +2322,19 @@ pub struct ScalingPlanProperties {
     #[serde(rename = "exclusionTag", default, skip_serializing_if = "Option::is_none")]
     pub exclusion_tag: Option<String>,
     #[doc = "List of ScalingSchedule definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedules: Vec<ScalingSchedule>,
     #[doc = "List of ScalingHostPoolReference definitions."]
-    #[serde(rename = "hostPoolReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostPoolReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub host_pool_references: Vec<ScalingHostPoolReference>,
 }
 impl ScalingPlanProperties {
@@ -2299,7 +2392,12 @@ pub struct ScalingSchedule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Set of days of the week on which this schedule is active."]
-    #[serde(rename = "daysOfWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_week: Vec<String>,
     #[doc = "Starting time for ramp up period."]
     #[serde(rename = "rampUpStartTime", default, with = "azure_core::date::rfc3339::option")]
@@ -2562,7 +2660,12 @@ impl SendMessage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -2725,7 +2828,11 @@ pub mod session_host_health_check_report {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SessionHostList {
     #[doc = "List of SessionHost definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SessionHost>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2820,7 +2927,12 @@ pub struct SessionHostProperties {
     #[serde(rename = "updateErrorMessage", default, skip_serializing_if = "Option::is_none")]
     pub update_error_message: Option<String>,
     #[doc = "List of SessionHostHealthCheckReports"]
-    #[serde(rename = "sessionHostHealthCheckResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sessionHostHealthCheckResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub session_host_health_check_results: Vec<SessionHostHealthCheckReport>,
 }
 impl SessionHostProperties {
@@ -2990,7 +3102,11 @@ impl StartMenuItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StartMenuItemList {
     #[doc = "List of StartMenuItem definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StartMenuItem>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3049,7 +3165,11 @@ impl UserSession {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserSessionList {
     #[doc = "List of UserSession definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserSession>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3196,7 +3316,11 @@ impl Workspace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceList {
     #[doc = "List of Workspace definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3238,7 +3362,12 @@ pub struct WorkspacePatchProperties {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "List of applicationGroup links."]
-    #[serde(rename = "applicationGroupReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGroupReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_group_references: Vec<String>,
     #[doc = "Enabled to allow this resource to be access from the public network"]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -3302,7 +3431,12 @@ pub struct WorkspaceProperties {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "List of applicationGroup resource Ids."]
-    #[serde(rename = "applicationGroupReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGroupReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_group_references: Vec<String>,
     #[doc = "Is cloud pc resource."]
     #[serde(rename = "cloudPcResource", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/desktopvirtualization/src/package_2021_07/models.rs b/services/mgmt/desktopvirtualization/src/package_2021_07/models.rs
index aaf6d58053..759561760e 100644
--- a/services/mgmt/desktopvirtualization/src/package_2021_07/models.rs
+++ b/services/mgmt/desktopvirtualization/src/package_2021_07/models.rs
@@ -39,7 +39,11 @@ impl ApplicationGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGroupList {
     #[doc = "List of ApplicationGroup definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationGroup>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -174,7 +178,11 @@ pub mod application_group_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationList {
     #[doc = "List of Application definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -520,7 +528,11 @@ impl Desktop {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DesktopList {
     #[doc = "List of Desktop definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Desktop>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -603,7 +615,11 @@ impl ExpandMsixImage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpandMsixImageList {
     #[doc = "List of MSIX package properties from give MSIX Image."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpandMsixImage>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -651,7 +667,12 @@ pub struct ExpandMsixImageProperties {
     #[serde(rename = "isActive", default, skip_serializing_if = "Option::is_none")]
     pub is_active: Option<bool>,
     #[doc = "List of package dependencies. "]
-    #[serde(rename = "packageDependencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageDependencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_dependencies: Vec<MsixPackageDependencies>,
     #[doc = "Package Version found in the appxmanifest.xml. "]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -660,7 +681,12 @@ pub struct ExpandMsixImageProperties {
     #[serde(rename = "lastUpdated", default, with = "azure_core::date::rfc3339::option")]
     pub last_updated: Option<time::OffsetDateTime>,
     #[doc = "List of package applications. "]
-    #[serde(rename = "packageApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_applications: Vec<MsixPackageApplications>,
 }
 impl ExpandMsixImageProperties {
@@ -688,7 +714,11 @@ impl HostPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HostPoolList {
     #[doc = "List of HostPool definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HostPool>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -978,7 +1008,12 @@ pub struct HostPoolProperties {
     #[serde(rename = "vmTemplate", default, skip_serializing_if = "Option::is_none")]
     pub vm_template: Option<String>,
     #[doc = "List of applicationGroup links."]
-    #[serde(rename = "applicationGroupReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGroupReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_group_references: Vec<String>,
     #[doc = "URL to customer ADFS server for signing WVD SSO certificates."]
     #[serde(rename = "ssoadfsAuthority", default, skip_serializing_if = "Option::is_none")]
@@ -1311,7 +1346,11 @@ impl MsixPackage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MsixPackageList {
     #[doc = "List of MSIX Package definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MsixPackage>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1385,7 +1424,12 @@ pub struct MsixPackageProperties {
     #[serde(rename = "isActive", default, skip_serializing_if = "Option::is_none")]
     pub is_active: Option<bool>,
     #[doc = "List of package dependencies. "]
-    #[serde(rename = "packageDependencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageDependencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_dependencies: Vec<MsixPackageDependencies>,
     #[doc = "Package Version found in the appxmanifest.xml. "]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1394,7 +1438,12 @@ pub struct MsixPackageProperties {
     #[serde(rename = "lastUpdated", default, with = "azure_core::date::rfc3339::option")]
     pub last_updated: Option<time::OffsetDateTime>,
     #[doc = "List of package applications. "]
-    #[serde(rename = "packageApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_applications: Vec<MsixPackageApplications>,
 }
 impl MsixPackageProperties {
@@ -1773,7 +1822,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
 }
 impl ResourceProviderOperationList {
@@ -1814,7 +1867,11 @@ impl ScalingPlan {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScalingPlanList {
     #[doc = "List of scaling plan definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScalingPlan>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1865,10 +1922,19 @@ pub struct ScalingPlanPatchProperties {
     #[serde(rename = "exclusionTag", default, skip_serializing_if = "Option::is_none")]
     pub exclusion_tag: Option<String>,
     #[doc = "List of ScalingSchedule definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedules: Vec<ScalingSchedule>,
     #[doc = "List of ScalingHostPoolReference definitions."]
-    #[serde(rename = "hostPoolReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostPoolReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub host_pool_references: Vec<ScalingHostPoolReference>,
 }
 impl ScalingPlanPatchProperties {
@@ -1941,10 +2007,19 @@ pub struct ScalingPlanProperties {
     #[serde(rename = "exclusionTag", default, skip_serializing_if = "Option::is_none")]
     pub exclusion_tag: Option<String>,
     #[doc = "List of ScalingSchedule definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedules: Vec<ScalingSchedule>,
     #[doc = "List of ScalingHostPoolReference definitions."]
-    #[serde(rename = "hostPoolReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostPoolReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub host_pool_references: Vec<ScalingHostPoolReference>,
 }
 impl ScalingPlanProperties {
@@ -2002,7 +2077,12 @@ pub struct ScalingSchedule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Set of days of the week on which this schedule is active."]
-    #[serde(rename = "daysOfWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_week: Vec<String>,
     #[doc = "Starting time for ramp up period."]
     #[serde(rename = "rampUpStartTime", default, with = "azure_core::date::rfc3339::option")]
@@ -2265,7 +2345,12 @@ impl SendMessage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -2428,7 +2513,11 @@ pub mod session_host_health_check_report {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SessionHostList {
     #[doc = "List of SessionHost definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SessionHost>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2523,7 +2612,12 @@ pub struct SessionHostProperties {
     #[serde(rename = "updateErrorMessage", default, skip_serializing_if = "Option::is_none")]
     pub update_error_message: Option<String>,
     #[doc = "List of SessionHostHealthCheckReports"]
-    #[serde(rename = "sessionHostHealthCheckResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sessionHostHealthCheckResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub session_host_health_check_results: Vec<SessionHostHealthCheckReport>,
 }
 impl SessionHostProperties {
@@ -2693,7 +2787,11 @@ impl StartMenuItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StartMenuItemList {
     #[doc = "List of StartMenuItem definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StartMenuItem>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2752,7 +2850,11 @@ impl UserSession {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserSessionList {
     #[doc = "List of UserSession definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserSession>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2899,7 +3001,11 @@ impl Workspace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceList {
     #[doc = "List of Workspace definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2941,7 +3047,12 @@ pub struct WorkspacePatchProperties {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "List of applicationGroup links."]
-    #[serde(rename = "applicationGroupReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGroupReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_group_references: Vec<String>,
 }
 impl WorkspacePatchProperties {
@@ -2962,7 +3073,12 @@ pub struct WorkspaceProperties {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "List of applicationGroup resource Ids."]
-    #[serde(rename = "applicationGroupReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGroupReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_group_references: Vec<String>,
     #[doc = "Is cloud pc resource."]
     #[serde(rename = "cloudPcResource", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/desktopvirtualization/src/package_preview_2021_09/models.rs b/services/mgmt/desktopvirtualization/src/package_preview_2021_09/models.rs
index adc6df2a58..3f2c703fe8 100644
--- a/services/mgmt/desktopvirtualization/src/package_preview_2021_09/models.rs
+++ b/services/mgmt/desktopvirtualization/src/package_preview_2021_09/models.rs
@@ -47,7 +47,11 @@ impl ApplicationGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGroupList {
     #[doc = "List of ApplicationGroup definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationGroup>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -182,7 +186,11 @@ pub mod application_group_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationList {
     #[doc = "List of Application definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -534,7 +542,11 @@ impl Desktop {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DesktopList {
     #[doc = "List of Desktop definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Desktop>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -623,7 +635,11 @@ impl ExpandMsixImage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpandMsixImageList {
     #[doc = "List of MSIX package properties from give MSIX Image."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpandMsixImage>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -671,7 +687,12 @@ pub struct ExpandMsixImageProperties {
     #[serde(rename = "isActive", default, skip_serializing_if = "Option::is_none")]
     pub is_active: Option<bool>,
     #[doc = "List of package dependencies. "]
-    #[serde(rename = "packageDependencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageDependencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_dependencies: Vec<MsixPackageDependencies>,
     #[doc = "Package Version found in the appxmanifest.xml. "]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -680,7 +701,12 @@ pub struct ExpandMsixImageProperties {
     #[serde(rename = "lastUpdated", default, with = "azure_core::date::rfc3339::option")]
     pub last_updated: Option<time::OffsetDateTime>,
     #[doc = "List of package applications. "]
-    #[serde(rename = "packageApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_applications: Vec<MsixPackageApplications>,
 }
 impl ExpandMsixImageProperties {
@@ -712,7 +738,11 @@ impl HostPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HostPoolList {
     #[doc = "List of HostPool definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HostPool>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1042,7 +1072,12 @@ pub struct HostPoolProperties {
     #[serde(rename = "vmTemplate", default, skip_serializing_if = "Option::is_none")]
     pub vm_template: Option<String>,
     #[doc = "List of applicationGroup links."]
-    #[serde(rename = "applicationGroupReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGroupReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_group_references: Vec<String>,
     #[doc = "URL to customer ADFS server for signing WVD SSO certificates."]
     #[serde(rename = "ssoadfsAuthority", default, skip_serializing_if = "Option::is_none")]
@@ -1420,7 +1455,11 @@ impl MsixPackage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MsixPackageList {
     #[doc = "List of MSIX Package definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MsixPackage>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1494,7 +1533,12 @@ pub struct MsixPackageProperties {
     #[serde(rename = "isActive", default, skip_serializing_if = "Option::is_none")]
     pub is_active: Option<bool>,
     #[doc = "List of package dependencies. "]
-    #[serde(rename = "packageDependencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageDependencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_dependencies: Vec<MsixPackageDependencies>,
     #[doc = "Package Version found in the appxmanifest.xml. "]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1503,7 +1547,12 @@ pub struct MsixPackageProperties {
     #[serde(rename = "lastUpdated", default, with = "azure_core::date::rfc3339::option")]
     pub last_updated: Option<time::OffsetDateTime>,
     #[doc = "List of package applications. "]
-    #[serde(rename = "packageApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_applications: Vec<MsixPackageApplications>,
 }
 impl MsixPackageProperties {
@@ -1689,7 +1738,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResultWithSystemData {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnectionWithSystemData>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1840,7 +1893,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1864,10 +1921,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -2116,7 +2183,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2169,7 +2240,11 @@ impl ScalingPlan {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScalingPlanList {
     #[doc = "List of scaling plan definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScalingPlan>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2217,10 +2292,19 @@ pub struct ScalingPlanPatchProperties {
     #[serde(rename = "exclusionTag", default, skip_serializing_if = "Option::is_none")]
     pub exclusion_tag: Option<String>,
     #[doc = "List of ScalingSchedule definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedules: Vec<ScalingSchedule>,
     #[doc = "List of ScalingHostPoolReference definitions."]
-    #[serde(rename = "hostPoolReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostPoolReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub host_pool_references: Vec<ScalingHostPoolReference>,
 }
 impl ScalingPlanPatchProperties {
@@ -2250,10 +2334,19 @@ pub struct ScalingPlanProperties {
     #[serde(rename = "exclusionTag", default, skip_serializing_if = "Option::is_none")]
     pub exclusion_tag: Option<String>,
     #[doc = "List of ScalingSchedule definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedules: Vec<ScalingSchedule>,
     #[doc = "List of ScalingHostPoolReference definitions."]
-    #[serde(rename = "hostPoolReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostPoolReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub host_pool_references: Vec<ScalingHostPoolReference>,
 }
 impl ScalingPlanProperties {
@@ -2306,7 +2399,12 @@ pub struct ScalingSchedule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Set of days of the week on which this schedule is active."]
-    #[serde(rename = "daysOfWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_week: Vec<String>,
     #[doc = "The time for a scaling action to occur."]
     #[serde(rename = "rampUpStartTime", default, skip_serializing_if = "Option::is_none")]
@@ -2569,7 +2667,12 @@ impl SendMessage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -2735,7 +2838,11 @@ pub mod session_host_health_check_report {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SessionHostList {
     #[doc = "List of SessionHost definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SessionHost>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2830,7 +2937,12 @@ pub struct SessionHostProperties {
     #[serde(rename = "updateErrorMessage", default, skip_serializing_if = "Option::is_none")]
     pub update_error_message: Option<String>,
     #[doc = "List of SessionHostHealthCheckReports"]
-    #[serde(rename = "sessionHostHealthCheckResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sessionHostHealthCheckResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub session_host_health_check_results: Vec<SessionHostHealthCheckReport>,
 }
 impl SessionHostProperties {
@@ -3000,7 +3112,11 @@ impl StartMenuItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StartMenuItemList {
     #[doc = "List of StartMenuItem definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StartMenuItem>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3075,7 +3191,11 @@ impl UserSession {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserSessionList {
     #[doc = "List of UserSession definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserSession>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3225,7 +3345,11 @@ impl Workspace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceList {
     #[doc = "List of Workspace definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3267,7 +3391,12 @@ pub struct WorkspacePatchProperties {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "List of applicationGroup links."]
-    #[serde(rename = "applicationGroupReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGroupReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_group_references: Vec<String>,
     #[doc = "Enabled to allow this resource to be access from the public network"]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -3331,7 +3460,12 @@ pub struct WorkspaceProperties {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "List of applicationGroup resource Ids."]
-    #[serde(rename = "applicationGroupReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGroupReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_group_references: Vec<String>,
     #[doc = "Is cloud pc resource."]
     #[serde(rename = "cloudPcResource", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/desktopvirtualization/src/package_preview_2022_02/models.rs b/services/mgmt/desktopvirtualization/src/package_preview_2022_02/models.rs
index a338d1ee99..2a0a8c6a7a 100644
--- a/services/mgmt/desktopvirtualization/src/package_preview_2022_02/models.rs
+++ b/services/mgmt/desktopvirtualization/src/package_preview_2022_02/models.rs
@@ -16,7 +16,12 @@ pub struct AgentUpdatePatchProperties {
     #[serde(rename = "maintenanceWindowTimeZone", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_window_time_zone: Option<String>,
     #[doc = "The maintenance windows (day and time) for updating the agent components. At least 1 window must be specified. Optionally, a 2nd window can be specified."]
-    #[serde(rename = "maintenanceWindows", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "maintenanceWindows",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub maintenance_windows: Vec<MaintenanceWindowPatchProperties>,
 }
 impl AgentUpdatePatchProperties {
@@ -77,7 +82,12 @@ pub struct AgentUpdateProperties {
     #[serde(rename = "maintenanceWindowTimeZone", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_window_time_zone: Option<String>,
     #[doc = "The maintenance windows (day and time) for updating the agent components. At least 1 window must be specified. Optionally, a 2nd window can be specified."]
-    #[serde(rename = "maintenanceWindows", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "maintenanceWindows",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub maintenance_windows: Vec<MaintenanceWindowProperties>,
 }
 impl AgentUpdateProperties {
@@ -169,7 +179,11 @@ impl ApplicationGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGroupList {
     #[doc = "List of ApplicationGroup definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationGroup>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -304,7 +318,11 @@ pub mod application_group_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationList {
     #[doc = "List of Application definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -656,7 +674,11 @@ impl Desktop {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DesktopList {
     #[doc = "List of Desktop definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Desktop>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -745,7 +767,11 @@ impl ExpandMsixImage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpandMsixImageList {
     #[doc = "List of MSIX package properties from give MSIX Image."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpandMsixImage>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -793,7 +819,12 @@ pub struct ExpandMsixImageProperties {
     #[serde(rename = "isActive", default, skip_serializing_if = "Option::is_none")]
     pub is_active: Option<bool>,
     #[doc = "List of package dependencies. "]
-    #[serde(rename = "packageDependencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageDependencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_dependencies: Vec<MsixPackageDependencies>,
     #[doc = "Package Version found in the appxmanifest.xml. "]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -802,7 +833,12 @@ pub struct ExpandMsixImageProperties {
     #[serde(rename = "lastUpdated", default, with = "azure_core::date::rfc3339::option")]
     pub last_updated: Option<time::OffsetDateTime>,
     #[doc = "List of package applications. "]
-    #[serde(rename = "packageApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_applications: Vec<MsixPackageApplications>,
 }
 impl ExpandMsixImageProperties {
@@ -834,7 +870,11 @@ impl HostPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HostPoolList {
     #[doc = "List of HostPool definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HostPool>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1173,7 +1213,12 @@ pub struct HostPoolProperties {
     #[serde(rename = "vmTemplate", default, skip_serializing_if = "Option::is_none")]
     pub vm_template: Option<String>,
     #[doc = "List of applicationGroup links."]
-    #[serde(rename = "applicationGroupReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGroupReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_group_references: Vec<String>,
     #[doc = "URL to customer ADFS server for signing WVD SSO certificates."]
     #[serde(rename = "ssoadfsAuthority", default, skip_serializing_if = "Option::is_none")]
@@ -1206,7 +1251,12 @@ pub struct HostPoolProperties {
     #[serde(rename = "agentUpdate", default, skip_serializing_if = "Option::is_none")]
     pub agent_update: Option<AgentUpdateProperties>,
     #[doc = "List of private endpoint connection associated with the specified resource"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl HostPoolProperties {
@@ -1565,7 +1615,11 @@ impl MsixPackage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MsixPackageList {
     #[doc = "List of MSIX Package definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MsixPackage>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1639,7 +1693,12 @@ pub struct MsixPackageProperties {
     #[serde(rename = "isActive", default, skip_serializing_if = "Option::is_none")]
     pub is_active: Option<bool>,
     #[doc = "List of package dependencies. "]
-    #[serde(rename = "packageDependencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageDependencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_dependencies: Vec<MsixPackageDependencies>,
     #[doc = "Package Version found in the appxmanifest.xml. "]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1648,7 +1707,12 @@ pub struct MsixPackageProperties {
     #[serde(rename = "lastUpdated", default, with = "azure_core::date::rfc3339::option")]
     pub last_updated: Option<time::OffsetDateTime>,
     #[doc = "List of package applications. "]
-    #[serde(rename = "packageApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_applications: Vec<MsixPackageApplications>,
 }
 impl MsixPackageProperties {
@@ -1892,7 +1956,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResultWithSystemData {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnectionWithSystemData>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2043,7 +2111,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2067,10 +2139,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -2319,7 +2401,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2372,7 +2458,11 @@ impl ScalingPlan {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScalingPlanList {
     #[doc = "List of scaling plan definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScalingPlan>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2420,10 +2510,19 @@ pub struct ScalingPlanPatchProperties {
     #[serde(rename = "exclusionTag", default, skip_serializing_if = "Option::is_none")]
     pub exclusion_tag: Option<String>,
     #[doc = "List of ScalingSchedule definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedules: Vec<ScalingSchedule>,
     #[doc = "List of ScalingHostPoolReference definitions."]
-    #[serde(rename = "hostPoolReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostPoolReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub host_pool_references: Vec<ScalingHostPoolReference>,
 }
 impl ScalingPlanPatchProperties {
@@ -2453,10 +2552,19 @@ pub struct ScalingPlanProperties {
     #[serde(rename = "exclusionTag", default, skip_serializing_if = "Option::is_none")]
     pub exclusion_tag: Option<String>,
     #[doc = "List of ScalingSchedule definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedules: Vec<ScalingSchedule>,
     #[doc = "List of ScalingHostPoolReference definitions."]
-    #[serde(rename = "hostPoolReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostPoolReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub host_pool_references: Vec<ScalingHostPoolReference>,
 }
 impl ScalingPlanProperties {
@@ -2509,7 +2617,12 @@ pub struct ScalingSchedule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Set of days of the week on which this schedule is active."]
-    #[serde(rename = "daysOfWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_week: Vec<String>,
     #[doc = "The time for a scaling action to occur."]
     #[serde(rename = "rampUpStartTime", default, skip_serializing_if = "Option::is_none")]
@@ -2772,7 +2885,12 @@ impl SendMessage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -2938,7 +3056,11 @@ pub mod session_host_health_check_report {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SessionHostList {
     #[doc = "List of SessionHost definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SessionHost>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3039,7 +3161,12 @@ pub struct SessionHostProperties {
     #[serde(rename = "updateErrorMessage", default, skip_serializing_if = "Option::is_none")]
     pub update_error_message: Option<String>,
     #[doc = "List of SessionHostHealthCheckReports"]
-    #[serde(rename = "sessionHostHealthCheckResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sessionHostHealthCheckResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub session_host_health_check_results: Vec<SessionHostHealthCheckReport>,
 }
 impl SessionHostProperties {
@@ -3209,7 +3336,11 @@ impl StartMenuItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StartMenuItemList {
     #[doc = "List of StartMenuItem definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StartMenuItem>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3284,7 +3415,11 @@ impl UserSession {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserSessionList {
     #[doc = "List of UserSession definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserSession>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3434,7 +3569,11 @@ impl Workspace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceList {
     #[doc = "List of Workspace definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3476,7 +3615,12 @@ pub struct WorkspacePatchProperties {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "List of applicationGroup links."]
-    #[serde(rename = "applicationGroupReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGroupReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_group_references: Vec<String>,
     #[doc = "Enabled to allow this resource to be access from the public network"]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -3540,7 +3684,12 @@ pub struct WorkspaceProperties {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "List of applicationGroup resource Ids."]
-    #[serde(rename = "applicationGroupReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGroupReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_group_references: Vec<String>,
     #[doc = "Is cloud pc resource."]
     #[serde(rename = "cloudPcResource", default, skip_serializing_if = "Option::is_none")]
@@ -3549,7 +3698,12 @@ pub struct WorkspaceProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<workspace_properties::PublicNetworkAccess>,
     #[doc = "List of private endpoint connection associated with the specified resource"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl WorkspaceProperties {
diff --git a/services/mgmt/desktopvirtualization/src/package_preview_2022_04/models.rs b/services/mgmt/desktopvirtualization/src/package_preview_2022_04/models.rs
index 44a37bf4b5..02228f41ce 100644
--- a/services/mgmt/desktopvirtualization/src/package_preview_2022_04/models.rs
+++ b/services/mgmt/desktopvirtualization/src/package_preview_2022_04/models.rs
@@ -16,7 +16,12 @@ pub struct AgentUpdatePatchProperties {
     #[serde(rename = "maintenanceWindowTimeZone", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_window_time_zone: Option<String>,
     #[doc = "List of maintenance windows. Maintenance windows are 2 hours long."]
-    #[serde(rename = "maintenanceWindows", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "maintenanceWindows",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub maintenance_windows: Vec<MaintenanceWindowPatchProperties>,
 }
 impl AgentUpdatePatchProperties {
@@ -77,7 +82,12 @@ pub struct AgentUpdateProperties {
     #[serde(rename = "maintenanceWindowTimeZone", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_window_time_zone: Option<String>,
     #[doc = "List of maintenance windows. Maintenance windows are 2 hours long."]
-    #[serde(rename = "maintenanceWindows", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "maintenanceWindows",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub maintenance_windows: Vec<MaintenanceWindowProperties>,
 }
 impl AgentUpdateProperties {
@@ -169,7 +179,11 @@ impl ApplicationGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGroupList {
     #[doc = "List of ApplicationGroup definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationGroup>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -304,7 +318,11 @@ pub mod application_group_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationList {
     #[doc = "List of Application definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -656,7 +674,11 @@ impl Desktop {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DesktopList {
     #[doc = "List of Desktop definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Desktop>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -745,7 +767,11 @@ impl ExpandMsixImage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpandMsixImageList {
     #[doc = "List of MSIX package properties from give MSIX Image."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpandMsixImage>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -793,7 +819,12 @@ pub struct ExpandMsixImageProperties {
     #[serde(rename = "isActive", default, skip_serializing_if = "Option::is_none")]
     pub is_active: Option<bool>,
     #[doc = "List of package dependencies. "]
-    #[serde(rename = "packageDependencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageDependencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_dependencies: Vec<MsixPackageDependencies>,
     #[doc = "Package Version found in the appxmanifest.xml. "]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -802,7 +833,12 @@ pub struct ExpandMsixImageProperties {
     #[serde(rename = "lastUpdated", default, with = "azure_core::date::rfc3339::option")]
     pub last_updated: Option<time::OffsetDateTime>,
     #[doc = "List of package applications. "]
-    #[serde(rename = "packageApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_applications: Vec<MsixPackageApplications>,
 }
 impl ExpandMsixImageProperties {
@@ -834,7 +870,11 @@ impl HostPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HostPoolList {
     #[doc = "List of HostPool definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HostPool>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1173,7 +1213,12 @@ pub struct HostPoolProperties {
     #[serde(rename = "vmTemplate", default, skip_serializing_if = "Option::is_none")]
     pub vm_template: Option<String>,
     #[doc = "List of applicationGroup links."]
-    #[serde(rename = "applicationGroupReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGroupReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_group_references: Vec<String>,
     #[doc = "URL to customer ADFS server for signing WVD SSO certificates."]
     #[serde(rename = "ssoadfsAuthority", default, skip_serializing_if = "Option::is_none")]
@@ -1206,7 +1251,12 @@ pub struct HostPoolProperties {
     #[serde(rename = "agentUpdate", default, skip_serializing_if = "Option::is_none")]
     pub agent_update: Option<AgentUpdateProperties>,
     #[doc = "List of private endpoint connection associated with the specified resource"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl HostPoolProperties {
@@ -1565,7 +1615,11 @@ impl MsixPackage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MsixPackageList {
     #[doc = "List of MSIX Package definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MsixPackage>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1639,7 +1693,12 @@ pub struct MsixPackageProperties {
     #[serde(rename = "isActive", default, skip_serializing_if = "Option::is_none")]
     pub is_active: Option<bool>,
     #[doc = "List of package dependencies. "]
-    #[serde(rename = "packageDependencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageDependencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_dependencies: Vec<MsixPackageDependencies>,
     #[doc = "Package Version found in the appxmanifest.xml. "]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1648,7 +1707,12 @@ pub struct MsixPackageProperties {
     #[serde(rename = "lastUpdated", default, with = "azure_core::date::rfc3339::option")]
     pub last_updated: Option<time::OffsetDateTime>,
     #[doc = "List of package applications. "]
-    #[serde(rename = "packageApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_applications: Vec<MsixPackageApplications>,
 }
 impl MsixPackageProperties {
@@ -1892,7 +1956,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResultWithSystemData {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnectionWithSystemData>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2043,7 +2111,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2067,10 +2139,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -2319,7 +2401,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2375,7 +2461,11 @@ impl ScalingPlan {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScalingPlanList {
     #[doc = "List of scaling plan definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScalingPlan>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2423,10 +2513,19 @@ pub struct ScalingPlanPatchProperties {
     #[serde(rename = "exclusionTag", default, skip_serializing_if = "Option::is_none")]
     pub exclusion_tag: Option<String>,
     #[doc = "List of ScalingSchedule definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedules: Vec<ScalingSchedule>,
     #[doc = "List of ScalingHostPoolReference definitions."]
-    #[serde(rename = "hostPoolReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostPoolReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub host_pool_references: Vec<ScalingHostPoolReference>,
 }
 impl ScalingPlanPatchProperties {
@@ -2458,7 +2557,11 @@ impl ScalingPlanPooledSchedule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScalingPlanPooledScheduleList {
     #[doc = "List of ScalingPlanPooledSchedule definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScalingPlanPooledSchedule>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2493,7 +2596,12 @@ impl ScalingPlanPooledSchedulePatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScalingPlanPooledScheduleProperties {
     #[doc = "Set of days of the week on which this schedule is active."]
-    #[serde(rename = "daysOfWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_week: Vec<String>,
     #[doc = "The time for a scaling action to occur."]
     #[serde(rename = "rampUpStartTime", default, skip_serializing_if = "Option::is_none")]
@@ -2759,10 +2867,19 @@ pub struct ScalingPlanProperties {
     #[serde(rename = "exclusionTag", default, skip_serializing_if = "Option::is_none")]
     pub exclusion_tag: Option<String>,
     #[doc = "List of ScalingPlanPooledSchedule definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedules: Vec<ScalingSchedule>,
     #[doc = "List of ScalingHostPoolReference definitions."]
-    #[serde(rename = "hostPoolReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostPoolReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub host_pool_references: Vec<ScalingHostPoolReference>,
 }
 impl ScalingPlanProperties {
@@ -2829,7 +2946,12 @@ pub struct ScalingSchedule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Set of days of the week on which this schedule is active."]
-    #[serde(rename = "daysOfWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_week: Vec<String>,
     #[doc = "The time for a scaling action to occur."]
     #[serde(rename = "rampUpStartTime", default, skip_serializing_if = "Option::is_none")]
@@ -3092,7 +3214,12 @@ impl SendMessage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -3258,7 +3385,11 @@ pub mod session_host_health_check_report {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SessionHostList {
     #[doc = "List of SessionHost definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SessionHost>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3359,7 +3490,12 @@ pub struct SessionHostProperties {
     #[serde(rename = "updateErrorMessage", default, skip_serializing_if = "Option::is_none")]
     pub update_error_message: Option<String>,
     #[doc = "List of SessionHostHealthCheckReports"]
-    #[serde(rename = "sessionHostHealthCheckResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sessionHostHealthCheckResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub session_host_health_check_results: Vec<SessionHostHealthCheckReport>,
 }
 impl SessionHostProperties {
@@ -3529,7 +3665,11 @@ impl StartMenuItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StartMenuItemList {
     #[doc = "List of StartMenuItem definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StartMenuItem>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3604,7 +3744,11 @@ impl UserSession {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserSessionList {
     #[doc = "List of UserSession definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserSession>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3754,7 +3898,11 @@ impl Workspace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceList {
     #[doc = "List of Workspace definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3796,7 +3944,12 @@ pub struct WorkspacePatchProperties {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "List of applicationGroup links."]
-    #[serde(rename = "applicationGroupReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGroupReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_group_references: Vec<String>,
     #[doc = "Enabled to allow this resource to be access from the public network"]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -3860,7 +4013,12 @@ pub struct WorkspaceProperties {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "List of applicationGroup resource Ids."]
-    #[serde(rename = "applicationGroupReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGroupReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_group_references: Vec<String>,
     #[doc = "Is cloud pc resource."]
     #[serde(rename = "cloudPcResource", default, skip_serializing_if = "Option::is_none")]
@@ -3869,7 +4027,12 @@ pub struct WorkspaceProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<workspace_properties::PublicNetworkAccess>,
     #[doc = "List of private endpoint connection associated with the specified resource"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl WorkspaceProperties {
diff --git a/services/mgmt/devcenter/src/package_2022_08_01_preview/models.rs b/services/mgmt/devcenter/src/package_2022_08_01_preview/models.rs
index df59eef6b7..334777afe1 100644
--- a/services/mgmt/devcenter/src/package_2022_08_01_preview/models.rs
+++ b/services/mgmt/devcenter/src/package_2022_08_01_preview/models.rs
@@ -51,7 +51,11 @@ impl AttachedNetworkConnectionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AttachedNetworkListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AttachedNetworkConnection>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -101,7 +105,11 @@ impl Catalog {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CatalogListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Catalog>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -193,7 +201,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -227,7 +239,11 @@ impl DevBoxDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DevBoxDefinitionListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DevBoxDefinition>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -330,7 +346,11 @@ impl DevCenter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DevCenterListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DevCenter>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -368,10 +388,18 @@ pub struct DevCenterSku {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "SKU supported locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Collection of name/value pairs to describe the SKU capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
 }
 impl DevCenterSku {
@@ -510,7 +538,11 @@ impl EnvironmentType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EnvironmentTypeListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnvironmentType>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -569,7 +601,11 @@ impl Gallery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GalleryListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Gallery>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -718,7 +754,11 @@ impl HealthCheckStatusDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthCheckStatusDetailsListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HealthCheckStatusDetails>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -745,7 +785,12 @@ pub struct HealthCheckStatusDetailsProperties {
     #[serde(rename = "endDateTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_date_time: Option<time::OffsetDateTime>,
     #[doc = "Details for each health check item."]
-    #[serde(rename = "healthChecks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthChecks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_checks: Vec<HealthCheck>,
 }
 impl HealthCheckStatusDetailsProperties {
@@ -771,7 +816,11 @@ impl Image {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImageListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Image>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -915,7 +964,11 @@ impl ImageVersion {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImageVersionListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImageVersion>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -996,7 +1049,11 @@ impl Serialize for LicenseType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListUsagesResult {
     #[doc = "The array page of Usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "The link to get the next page of Usage result."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1140,7 +1197,11 @@ impl NetworkConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkConnectionListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkConnection>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1353,7 +1414,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1442,7 +1507,11 @@ impl Pool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PoolListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Pool>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1554,7 +1623,11 @@ impl ProjectEnvironmentType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProjectEnvironmentTypeListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProjectEnvironmentType>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1643,7 +1716,11 @@ pub mod project_environment_type_update_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProjectListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Project>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1784,7 +1861,11 @@ impl Schedule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScheduleListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Schedule>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1959,7 +2040,11 @@ impl Sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DevCenterSku>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/devcenter/src/package_2022_09_01_preview/models.rs b/services/mgmt/devcenter/src/package_2022_09_01_preview/models.rs
index 9749293026..3544566c76 100644
--- a/services/mgmt/devcenter/src/package_2022_09_01_preview/models.rs
+++ b/services/mgmt/devcenter/src/package_2022_09_01_preview/models.rs
@@ -21,7 +21,11 @@ impl AllowedEnvironmentType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedEnvironmentTypeListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AllowedEnvironmentType>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -98,7 +102,11 @@ impl AttachedNetworkConnectionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AttachedNetworkListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AttachedNetworkConnection>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -148,7 +156,11 @@ impl Catalog {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CatalogListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Catalog>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -240,7 +252,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -274,7 +290,11 @@ impl DevBoxDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DevBoxDefinitionListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DevBoxDefinition>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -377,7 +397,11 @@ impl DevCenter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DevCenterListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DevCenter>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -415,10 +439,18 @@ pub struct DevCenterSku {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "SKU supported locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Collection of name/value pairs to describe the SKU capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
 }
 impl DevCenterSku {
@@ -557,7 +589,11 @@ impl EnvironmentType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EnvironmentTypeListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnvironmentType>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -616,7 +652,11 @@ impl Gallery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GalleryListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Gallery>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -765,7 +805,11 @@ impl HealthCheckStatusDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthCheckStatusDetailsListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HealthCheckStatusDetails>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -792,7 +836,12 @@ pub struct HealthCheckStatusDetailsProperties {
     #[serde(rename = "endDateTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_date_time: Option<time::OffsetDateTime>,
     #[doc = "Details for each health check item."]
-    #[serde(rename = "healthChecks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthChecks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_checks: Vec<HealthCheck>,
 }
 impl HealthCheckStatusDetailsProperties {
@@ -818,7 +867,11 @@ impl Image {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImageListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Image>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -962,7 +1015,11 @@ impl ImageVersion {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImageVersionListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImageVersion>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1043,7 +1100,11 @@ impl Serialize for LicenseType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListUsagesResult {
     #[doc = "The array page of Usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "The link to get the next page of Usage result."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1187,7 +1248,11 @@ impl NetworkConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkConnectionListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkConnection>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1400,7 +1465,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1489,7 +1558,11 @@ impl Pool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PoolListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Pool>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1601,7 +1674,11 @@ impl ProjectEnvironmentType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProjectEnvironmentTypeListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProjectEnvironmentType>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1690,7 +1767,11 @@ pub mod project_environment_type_update_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProjectListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Project>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1831,7 +1912,11 @@ impl Schedule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScheduleListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Schedule>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2006,7 +2091,11 @@ impl Sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuListResult {
     #[doc = "Current page of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DevCenterSku>,
     #[doc = "URL to get the next set of results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/developerhub/src/package_preview_2022_04/models.rs b/services/mgmt/developerhub/src/package_preview_2022_04/models.rs
index 4d3e012198..e9e5d99f14 100644
--- a/services/mgmt/developerhub/src/package_preview_2022_04/models.rs
+++ b/services/mgmt/developerhub/src/package_preview_2022_04/models.rs
@@ -80,7 +80,12 @@ pub struct DeploymentProperties {
     #[doc = "Determines the type of manifests within the repository."]
     #[serde(rename = "manifestType", default, skip_serializing_if = "Option::is_none")]
     pub manifest_type: Option<ManifestType>,
-    #[serde(rename = "kubeManifestLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kubeManifestLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kube_manifest_locations: Vec<String>,
     #[doc = "Helm chart directory path in repository."]
     #[serde(rename = "helmChartPath", default, skip_serializing_if = "Option::is_none")]
@@ -125,10 +130,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -185,7 +199,11 @@ impl GitHubOAuthInfoResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GitHubOAuthListResponse {
     #[doc = "Singleton list response containing one GitHubOAuthResponse response"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GitHubOAuthResponse>,
 }
 impl GitHubOAuthListResponse {
@@ -457,7 +475,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -597,7 +619,11 @@ impl Workflow {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowListResult {
     #[doc = "The list of workflows."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workflow>,
     #[doc = "The URL to the next set of workflow results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/deviceupdate/src/package_2020_03_01_preview/models.rs b/services/mgmt/deviceupdate/src/package_2020_03_01_preview/models.rs
index 544187c1c7..b5804279a8 100644
--- a/services/mgmt/deviceupdate/src/package_2020_03_01_preview/models.rs
+++ b/services/mgmt/deviceupdate/src/package_2020_03_01_preview/models.rs
@@ -39,7 +39,12 @@ pub mod account {
         #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
         pub public_network_access: Option<properties::PublicNetworkAccess>,
         #[doc = "List of private endpoint connections associated with the account."]
-        #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "privateEndpointConnections",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     }
     impl Properties {
@@ -145,7 +150,11 @@ pub struct AccountList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
 }
 impl azure_core::Continuable for AccountList {
@@ -361,10 +370,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -400,7 +418,12 @@ pub struct GroupConnectivityInformation {
     #[serde(rename = "memberName", default, skip_serializing_if = "Option::is_none")]
     pub member_name: Option<String>,
     #[doc = "List of customer visible FQDNs."]
-    #[serde(rename = "customerVisibleFqdns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customerVisibleFqdns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customer_visible_fqdns: Vec<String>,
     #[doc = "Internal FQDN."]
     #[serde(rename = "internalFqdn", default, skip_serializing_if = "Option::is_none")]
@@ -517,7 +540,12 @@ pub mod instance {
         #[serde(rename = "accountName", default, skip_serializing_if = "Option::is_none")]
         pub account_name: Option<String>,
         #[doc = "List of IoT Hubs associated with the account."]
-        #[serde(rename = "iotHubs", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "iotHubs",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub iot_hubs: Vec<IotHubSettings>,
         #[doc = "Enables or Disables the diagnostic logs collection"]
         #[serde(rename = "enableDiagnostics", default, skip_serializing_if = "Option::is_none")]
@@ -587,7 +615,11 @@ pub struct InstanceList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Instance>,
 }
 impl azure_core::Continuable for InstanceList {
@@ -822,7 +854,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -871,7 +907,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -895,7 +935,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "privateLinkServiceConnectionState")]
     pub private_link_service_connection_state: PrivateLinkServiceConnectionState,
     #[doc = "Array of group IDs."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -987,7 +1032,11 @@ pub mod private_endpoint_connection_proxy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionProxyListResult {
     #[doc = "The list of available private endpoint connection proxies for an Account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnectionProxy>,
     #[doc = "The URI that can be used to request the next list of private endpoint connection proxies."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1130,7 +1179,11 @@ impl PrivateEndpointUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "The list of available private link resources for an Account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupInformation>,
     #[doc = "The URI that can be used to request the next list of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1154,10 +1207,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1172,7 +1235,12 @@ pub struct PrivateLinkServiceConnection {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of group IDs."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "Request message."]
     #[serde(rename = "requestMessage", default, skip_serializing_if = "Option::is_none")]
@@ -1218,7 +1286,12 @@ pub struct PrivateLinkServiceProxy {
     #[serde(rename = "remotePrivateEndpointConnection", default, skip_serializing_if = "Option::is_none")]
     pub remote_private_endpoint_connection: Option<serde_json::Value>,
     #[doc = "Group connectivity information."]
-    #[serde(rename = "groupConnectivityInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupConnectivityInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_connectivity_information: Vec<GroupConnectivityInformation>,
 }
 impl PrivateLinkServiceProxy {
@@ -1256,16 +1329,36 @@ pub struct RemotePrivateEndpoint {
     #[serde(rename = "vnetTrafficTag", default, skip_serializing_if = "Option::is_none")]
     pub vnet_traffic_tag: Option<String>,
     #[doc = "List of private link service connections that need manual approval."]
-    #[serde(rename = "manualPrivateLinkServiceConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "manualPrivateLinkServiceConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manual_private_link_service_connections: Vec<PrivateLinkServiceConnection>,
     #[doc = "List of automatically approved private link service connections."]
-    #[serde(rename = "privateLinkServiceConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkServiceConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_service_connections: Vec<PrivateLinkServiceConnection>,
     #[doc = "List of private link service proxies."]
-    #[serde(rename = "privateLinkServiceProxies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkServiceProxies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_service_proxies: Vec<PrivateLinkServiceProxy>,
     #[doc = "List of connection details."]
-    #[serde(rename = "connectionDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_details: Vec<ConnectionDetails>,
 }
 impl RemotePrivateEndpoint {
diff --git a/services/mgmt/deviceupdate/src/package_2022_04_01_preview/models.rs b/services/mgmt/deviceupdate/src/package_2022_04_01_preview/models.rs
index 08da5c5e0a..cdde3de867 100644
--- a/services/mgmt/deviceupdate/src/package_2022_04_01_preview/models.rs
+++ b/services/mgmt/deviceupdate/src/package_2022_04_01_preview/models.rs
@@ -39,13 +39,22 @@ pub mod account {
         #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
         pub public_network_access: Option<properties::PublicNetworkAccess>,
         #[doc = "List of private endpoint connections associated with the account."]
-        #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "privateEndpointConnections",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
         #[doc = "Device Update Sku"]
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub sku: Option<properties::Sku>,
         #[doc = "Device Update account primary and failover location details"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub locations: Vec<Location>,
     }
     impl Properties {
@@ -193,7 +202,11 @@ pub struct AccountList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
 }
 impl azure_core::Continuable for AccountList {
@@ -409,10 +422,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -448,7 +470,12 @@ pub struct GroupConnectivityInformation {
     #[serde(rename = "memberName", default, skip_serializing_if = "Option::is_none")]
     pub member_name: Option<String>,
     #[doc = "List of customer visible FQDNs."]
-    #[serde(rename = "customerVisibleFqdns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customerVisibleFqdns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customer_visible_fqdns: Vec<String>,
     #[doc = "Internal FQDN."]
     #[serde(rename = "internalFqdn", default, skip_serializing_if = "Option::is_none")]
@@ -565,7 +592,12 @@ pub mod instance {
         #[serde(rename = "accountName", default, skip_serializing_if = "Option::is_none")]
         pub account_name: Option<String>,
         #[doc = "List of IoT Hubs associated with the account."]
-        #[serde(rename = "iotHubs", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "iotHubs",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub iot_hubs: Vec<IotHubSettings>,
         #[doc = "Enables or Disables the diagnostic logs collection"]
         #[serde(rename = "enableDiagnostics", default, skip_serializing_if = "Option::is_none")]
@@ -635,7 +667,11 @@ pub struct InstanceList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Instance>,
 }
 impl azure_core::Continuable for InstanceList {
@@ -918,7 +954,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -967,7 +1007,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -991,7 +1035,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "privateLinkServiceConnectionState")]
     pub private_link_service_connection_state: PrivateLinkServiceConnectionState,
     #[doc = "Array of group IDs."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1083,7 +1132,11 @@ pub mod private_endpoint_connection_proxy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionProxyListResult {
     #[doc = "The list of available private endpoint connection proxies for an Account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnectionProxy>,
     #[doc = "The URI that can be used to request the next list of private endpoint connection proxies."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1226,7 +1279,11 @@ impl PrivateEndpointUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "The list of available private link resources for an Account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupInformation>,
     #[doc = "The URI that can be used to request the next list of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1250,10 +1307,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1268,7 +1335,12 @@ pub struct PrivateLinkServiceConnection {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of group IDs."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "Request message."]
     #[serde(rename = "requestMessage", default, skip_serializing_if = "Option::is_none")]
@@ -1314,7 +1386,12 @@ pub struct PrivateLinkServiceProxy {
     #[serde(rename = "remotePrivateEndpointConnection", default, skip_serializing_if = "Option::is_none")]
     pub remote_private_endpoint_connection: Option<serde_json::Value>,
     #[doc = "Group connectivity information."]
-    #[serde(rename = "groupConnectivityInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupConnectivityInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_connectivity_information: Vec<GroupConnectivityInformation>,
 }
 impl PrivateLinkServiceProxy {
@@ -1352,16 +1429,36 @@ pub struct RemotePrivateEndpoint {
     #[serde(rename = "vnetTrafficTag", default, skip_serializing_if = "Option::is_none")]
     pub vnet_traffic_tag: Option<String>,
     #[doc = "List of private link service connections that need manual approval."]
-    #[serde(rename = "manualPrivateLinkServiceConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "manualPrivateLinkServiceConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manual_private_link_service_connections: Vec<PrivateLinkServiceConnection>,
     #[doc = "List of automatically approved private link service connections."]
-    #[serde(rename = "privateLinkServiceConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkServiceConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_service_connections: Vec<PrivateLinkServiceConnection>,
     #[doc = "List of private link service proxies."]
-    #[serde(rename = "privateLinkServiceProxies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkServiceProxies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_service_proxies: Vec<PrivateLinkServiceProxy>,
     #[doc = "List of connection details."]
-    #[serde(rename = "connectionDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_details: Vec<ConnectionDetails>,
 }
 impl RemotePrivateEndpoint {
diff --git a/services/mgmt/deviceupdate/src/package_2022_10_01/models.rs b/services/mgmt/deviceupdate/src/package_2022_10_01/models.rs
index 08da5c5e0a..cdde3de867 100644
--- a/services/mgmt/deviceupdate/src/package_2022_10_01/models.rs
+++ b/services/mgmt/deviceupdate/src/package_2022_10_01/models.rs
@@ -39,13 +39,22 @@ pub mod account {
         #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
         pub public_network_access: Option<properties::PublicNetworkAccess>,
         #[doc = "List of private endpoint connections associated with the account."]
-        #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "privateEndpointConnections",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
         #[doc = "Device Update Sku"]
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub sku: Option<properties::Sku>,
         #[doc = "Device Update account primary and failover location details"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub locations: Vec<Location>,
     }
     impl Properties {
@@ -193,7 +202,11 @@ pub struct AccountList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
 }
 impl azure_core::Continuable for AccountList {
@@ -409,10 +422,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -448,7 +470,12 @@ pub struct GroupConnectivityInformation {
     #[serde(rename = "memberName", default, skip_serializing_if = "Option::is_none")]
     pub member_name: Option<String>,
     #[doc = "List of customer visible FQDNs."]
-    #[serde(rename = "customerVisibleFqdns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customerVisibleFqdns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customer_visible_fqdns: Vec<String>,
     #[doc = "Internal FQDN."]
     #[serde(rename = "internalFqdn", default, skip_serializing_if = "Option::is_none")]
@@ -565,7 +592,12 @@ pub mod instance {
         #[serde(rename = "accountName", default, skip_serializing_if = "Option::is_none")]
         pub account_name: Option<String>,
         #[doc = "List of IoT Hubs associated with the account."]
-        #[serde(rename = "iotHubs", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "iotHubs",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub iot_hubs: Vec<IotHubSettings>,
         #[doc = "Enables or Disables the diagnostic logs collection"]
         #[serde(rename = "enableDiagnostics", default, skip_serializing_if = "Option::is_none")]
@@ -635,7 +667,11 @@ pub struct InstanceList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Instance>,
 }
 impl azure_core::Continuable for InstanceList {
@@ -918,7 +954,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -967,7 +1007,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -991,7 +1035,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "privateLinkServiceConnectionState")]
     pub private_link_service_connection_state: PrivateLinkServiceConnectionState,
     #[doc = "Array of group IDs."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1083,7 +1132,11 @@ pub mod private_endpoint_connection_proxy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionProxyListResult {
     #[doc = "The list of available private endpoint connection proxies for an Account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnectionProxy>,
     #[doc = "The URI that can be used to request the next list of private endpoint connection proxies."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1226,7 +1279,11 @@ impl PrivateEndpointUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "The list of available private link resources for an Account"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupInformation>,
     #[doc = "The URI that can be used to request the next list of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1250,10 +1307,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1268,7 +1335,12 @@ pub struct PrivateLinkServiceConnection {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of group IDs."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "Request message."]
     #[serde(rename = "requestMessage", default, skip_serializing_if = "Option::is_none")]
@@ -1314,7 +1386,12 @@ pub struct PrivateLinkServiceProxy {
     #[serde(rename = "remotePrivateEndpointConnection", default, skip_serializing_if = "Option::is_none")]
     pub remote_private_endpoint_connection: Option<serde_json::Value>,
     #[doc = "Group connectivity information."]
-    #[serde(rename = "groupConnectivityInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupConnectivityInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_connectivity_information: Vec<GroupConnectivityInformation>,
 }
 impl PrivateLinkServiceProxy {
@@ -1352,16 +1429,36 @@ pub struct RemotePrivateEndpoint {
     #[serde(rename = "vnetTrafficTag", default, skip_serializing_if = "Option::is_none")]
     pub vnet_traffic_tag: Option<String>,
     #[doc = "List of private link service connections that need manual approval."]
-    #[serde(rename = "manualPrivateLinkServiceConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "manualPrivateLinkServiceConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manual_private_link_service_connections: Vec<PrivateLinkServiceConnection>,
     #[doc = "List of automatically approved private link service connections."]
-    #[serde(rename = "privateLinkServiceConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkServiceConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_service_connections: Vec<PrivateLinkServiceConnection>,
     #[doc = "List of private link service proxies."]
-    #[serde(rename = "privateLinkServiceProxies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkServiceProxies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_service_proxies: Vec<PrivateLinkServiceProxy>,
     #[doc = "List of connection details."]
-    #[serde(rename = "connectionDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_details: Vec<ConnectionDetails>,
 }
 impl RemotePrivateEndpoint {
diff --git a/services/mgmt/devops/src/package_2019_07_01_preview/models.rs b/services/mgmt/devops/src/package_2019_07_01_preview/models.rs
index e9f8619da4..d9fc5d04f7 100644
--- a/services/mgmt/devops/src/package_2019_07_01_preview/models.rs
+++ b/services/mgmt/devops/src/package_2019_07_01_preview/models.rs
@@ -108,7 +108,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -199,7 +203,12 @@ pub struct InputDescriptor {
     #[serde(rename = "type")]
     pub type_: input_descriptor::Type,
     #[doc = "List of possible values for the input parameter."]
-    #[serde(rename = "possibleValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "possibleValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub possible_values: Vec<InputValue>,
 }
 impl InputDescriptor {
@@ -316,7 +325,11 @@ impl OperationDisplayValue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by Microsoft.DevOps resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of operations, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -367,7 +380,11 @@ impl Pipeline {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PipelineListResult {
     #[doc = "List of pipelines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Pipeline>,
     #[doc = "URL to get the next set of Pipelines, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -431,7 +448,11 @@ pub struct PipelineTemplateDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of input parameters required by the template to create a pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<InputDescriptor>,
 }
 impl PipelineTemplateDefinition {
@@ -447,7 +468,11 @@ impl PipelineTemplateDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PipelineTemplateDefinitionListResult {
     #[doc = "List of pipeline template definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PipelineTemplateDefinition>,
     #[doc = "The URL to get the next set of pipeline template definitions, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/devops/src/package_2020_07_13_preview/models.rs b/services/mgmt/devops/src/package_2020_07_13_preview/models.rs
index 68b0c98bbf..c818c0983d 100644
--- a/services/mgmt/devops/src/package_2020_07_13_preview/models.rs
+++ b/services/mgmt/devops/src/package_2020_07_13_preview/models.rs
@@ -108,7 +108,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -199,7 +203,12 @@ pub struct InputDescriptor {
     #[serde(rename = "type")]
     pub type_: input_descriptor::Type,
     #[doc = "List of possible values for the input parameter."]
-    #[serde(rename = "possibleValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "possibleValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub possible_values: Vec<InputValue>,
 }
 impl InputDescriptor {
@@ -316,7 +325,11 @@ impl OperationDisplayValue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by Microsoft.DevOps resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of operations, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -371,7 +384,11 @@ impl Pipeline {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PipelineListResult {
     #[doc = "List of pipelines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Pipeline>,
     #[doc = "URL to get the next set of Pipelines, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -475,7 +492,11 @@ pub struct PipelineTemplateDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of input parameters required by the template to create a pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<InputDescriptor>,
 }
 impl PipelineTemplateDefinition {
@@ -491,7 +512,11 @@ impl PipelineTemplateDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PipelineTemplateDefinitionListResult {
     #[doc = "List of pipeline template definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PipelineTemplateDefinition>,
     #[doc = "The URL to get the next set of pipeline template definitions, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/devspaces/src/package_2019_04_01/models.rs b/services/mgmt/devspaces/src/package_2019_04_01/models.rs
index a2c79dbbb2..4dead6e78c 100644
--- a/services/mgmt/devspaces/src/package_2019_04_01/models.rs
+++ b/services/mgmt/devspaces/src/package_2019_04_01/models.rs
@@ -49,7 +49,12 @@ impl ControllerConnectionDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ControllerConnectionDetailsList {
     #[doc = "List of Azure Dev Spaces Controller connection details."]
-    #[serde(rename = "connectionDetailsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionDetailsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_details_list: Vec<ControllerConnectionDetails>,
 }
 impl ControllerConnectionDetailsList {
@@ -60,7 +65,11 @@ impl ControllerConnectionDetailsList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ControllerList {
     #[doc = "List of Azure Dev Spaces Controllers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Controller>,
     #[doc = "The URI that can be used to request the next page for list of Azure Dev Spaces Controllers."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -313,7 +322,11 @@ impl ResourceProviderOperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "Resource provider operations list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperationDefinition>,
     #[doc = "The URI that can be used to request the next page for list of Azure operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/devtestlabs/src/package_2015_05_preview/models.rs b/services/mgmt/devtestlabs/src/package_2015_05_preview/models.rs
index f14603cd61..3e1ffd03ba 100644
--- a/services/mgmt/devtestlabs/src/package_2015_05_preview/models.rs
+++ b/services/mgmt/devtestlabs/src/package_2015_05_preview/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplyArtifactsRequest {
     #[doc = "The list of artifacts to apply."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ArtifactInstallProperties>,
 }
 impl ApplyArtifactsRequest {
@@ -80,7 +84,11 @@ pub struct ArtifactInstallProperties {
     #[serde(rename = "artifactId", default, skip_serializing_if = "Option::is_none")]
     pub artifact_id: Option<String>,
     #[doc = "The parameters of the artifact."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ArtifactParameterProperties>,
 }
 impl ArtifactInstallProperties {
@@ -290,7 +298,11 @@ pub struct CloudErrorBody {
     pub message: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -354,7 +366,12 @@ impl CostInsight {
 pub struct CostInsightProperties {
     #[serde(rename = "currencyCode", default, skip_serializing_if = "Option::is_none")]
     pub currency_code: Option<String>,
-    #[serde(rename = "vmCosts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmCosts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_costs: Vec<VmCostProperties>,
     #[doc = "The provisioning status of the resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -432,7 +449,11 @@ pub struct CostProperties {
     #[serde(rename = "currencyCode", default, skip_serializing_if = "Option::is_none")]
     pub currency_code: Option<String>,
     #[doc = "The per-day costs items of the cost."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<CostPerDayProperties>,
 }
 impl CostProperties {
@@ -608,7 +629,11 @@ impl EvaluatePoliciesProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EvaluatePoliciesRequest {
     #[doc = "Policies to evaluate."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policies: Vec<EvaluatePoliciesProperties>,
 }
 impl EvaluatePoliciesRequest {
@@ -620,7 +645,11 @@ impl EvaluatePoliciesRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EvaluatePoliciesResponse {
     #[doc = "Results of evaluating a policy set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub results: Vec<PolicySetResult>,
 }
 impl EvaluatePoliciesResponse {
@@ -782,7 +811,11 @@ pub struct GenerateArmTemplateRequest {
     #[serde(rename = "virtualMachineName", default, skip_serializing_if = "Option::is_none")]
     pub virtual_machine_name: Option<String>,
     #[doc = "The parameters of the ARM template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ParameterInfo>,
     #[doc = "The location of the virtual machine."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -866,7 +899,12 @@ pub struct LabProperties {
     #[serde(rename = "artifactsStorageAccount", default, skip_serializing_if = "Option::is_none")]
     pub artifacts_storage_account: Option<String>,
     #[doc = "The storage accounts of the lab."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<String>,
     #[doc = "The name of the key vault of the lab."]
     #[serde(rename = "vaultName", default, skip_serializing_if = "Option::is_none")]
@@ -1020,7 +1058,11 @@ pub struct LabVirtualMachineProperties {
     #[serde(rename = "disallowPublicIpAddress", default, skip_serializing_if = "Option::is_none")]
     pub disallow_public_ip_address: Option<bool>,
     #[doc = "The artifacts to be installed on the virtual machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ArtifactInstallProperties>,
     #[doc = "Properties of an artifact deployment."]
     #[serde(rename = "artifactDeploymentStatus", default, skip_serializing_if = "Option::is_none")]
@@ -1294,7 +1336,12 @@ pub struct PolicySetResult {
     #[serde(rename = "hasError", default, skip_serializing_if = "Option::is_none")]
     pub has_error: Option<bool>,
     #[doc = "The list of policy violations."]
-    #[serde(rename = "policyViolations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyViolations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_violations: Vec<PolicyViolation>,
 }
 impl PolicySetResult {
@@ -1321,7 +1368,11 @@ impl PolicyViolation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationArtifactSource {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArtifactSource>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1342,7 +1393,11 @@ impl ResponseWithContinuationArtifactSource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationArtifact {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Artifact>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1363,7 +1418,11 @@ impl ResponseWithContinuationArtifact {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationCostInsight {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CostInsight>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1384,7 +1443,11 @@ impl ResponseWithContinuationCostInsight {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationCost {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cost>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1405,7 +1468,11 @@ impl ResponseWithContinuationCost {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationCustomImage {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomImage>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1426,7 +1493,11 @@ impl ResponseWithContinuationCustomImage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationFormula {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Formula>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1447,7 +1518,11 @@ impl ResponseWithContinuationFormula {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationGalleryImage {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GalleryImage>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1468,7 +1543,11 @@ impl ResponseWithContinuationGalleryImage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationLabVhd {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LabVhd>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1489,7 +1568,11 @@ impl ResponseWithContinuationLabVhd {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationLabVirtualMachine {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LabVirtualMachine>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1510,7 +1593,11 @@ impl ResponseWithContinuationLabVirtualMachine {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationLab {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Lab>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1531,7 +1618,11 @@ impl ResponseWithContinuationLab {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationPolicy {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Policy>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1552,7 +1643,11 @@ impl ResponseWithContinuationPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationSchedule {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Schedule>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1573,7 +1668,11 @@ impl ResponseWithContinuationSchedule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationVirtualNetwork {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetwork>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1999,7 +2098,12 @@ impl VirtualNetwork {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkProperties {
     #[doc = "The allowed subnets of the virtual network."]
-    #[serde(rename = "allowedSubnets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedSubnets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_subnets: Vec<Subnet>,
     #[doc = "The description of the virtual network."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2008,7 +2112,12 @@ pub struct VirtualNetworkProperties {
     #[serde(rename = "externalProviderResourceId", default, skip_serializing_if = "Option::is_none")]
     pub external_provider_resource_id: Option<String>,
     #[doc = "The subnet overrides of the virtual network."]
-    #[serde(rename = "subnetOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subnetOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnet_overrides: Vec<SubnetOverride>,
     #[doc = "The provisioning status of the resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2023,7 +2132,11 @@ impl VirtualNetworkProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeekDetails {
     #[doc = "The days of the week."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weekdays: Vec<String>,
     #[doc = "The time of the day."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/devtestlabs/src/package_2016_05/models.rs b/services/mgmt/devtestlabs/src/package_2016_05/models.rs
index 259be081bb..947de92695 100644
--- a/services/mgmt/devtestlabs/src/package_2016_05/models.rs
+++ b/services/mgmt/devtestlabs/src/package_2016_05/models.rs
@@ -67,7 +67,11 @@ impl ApplicableSchedulePropertiesFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplyArtifactsRequest {
     #[doc = "The list of artifacts to apply."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ArtifactInstallProperties>,
 }
 impl ApplyArtifactsRequest {
@@ -143,7 +147,12 @@ pub struct ArmTemplateProperties {
     #[serde(rename = "createdDate", default, with = "azure_core::date::rfc3339::option")]
     pub created_date: Option<time::OffsetDateTime>,
     #[doc = "File name and parameter values information from all azuredeploy.*.parameters.json for the ARM template."]
-    #[serde(rename = "parametersValueFilesInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parametersValueFilesInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters_value_files_info: Vec<ParametersValueFileInfo>,
 }
 impl ArmTemplateProperties {
@@ -210,7 +219,11 @@ pub struct ArtifactInstallProperties {
     #[serde(rename = "artifactId", default, skip_serializing_if = "Option::is_none")]
     pub artifact_id: Option<String>,
     #[doc = "The parameters of the artifact."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ArtifactParameterProperties>,
     #[doc = "The status of the artifact."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -237,7 +250,11 @@ pub struct ArtifactInstallPropertiesFragment {
     #[serde(rename = "artifactId", default, skip_serializing_if = "Option::is_none")]
     pub artifact_id: Option<String>,
     #[doc = "The parameters of the artifact."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ArtifactParameterPropertiesFragment>,
     #[doc = "The status of the artifact."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -695,7 +712,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Inner errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -785,7 +806,11 @@ impl ComputeVmInstanceViewStatusFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeVmProperties {
     #[doc = "Gets the statuses of the virtual machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ComputeVmInstanceViewStatus>,
     #[doc = "Gets the OS type of the virtual machine."]
     #[serde(rename = "osType", default, skip_serializing_if = "Option::is_none")]
@@ -800,10 +825,20 @@ pub struct ComputeVmProperties {
     #[serde(rename = "osDiskId", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_id: Option<String>,
     #[doc = "Gets data disks blob uri for the virtual machine."]
-    #[serde(rename = "dataDiskIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_ids: Vec<String>,
     #[doc = "Gets all data disks attached to the virtual machine."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<ComputeDataDisk>,
 }
 impl ComputeVmProperties {
@@ -815,7 +850,11 @@ impl ComputeVmProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeVmPropertiesFragment {
     #[doc = "Gets the statuses of the virtual machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ComputeVmInstanceViewStatusFragment>,
     #[doc = "Gets the OS type of the virtual machine."]
     #[serde(rename = "osType", default, skip_serializing_if = "Option::is_none")]
@@ -830,10 +869,20 @@ pub struct ComputeVmPropertiesFragment {
     #[serde(rename = "osDiskId", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_id: Option<String>,
     #[doc = "Gets data disks blob uri for the virtual machine."]
-    #[serde(rename = "dataDiskIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_ids: Vec<String>,
     #[doc = "Gets all data disks attached to the virtual machine."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<ComputeDataDiskFragment>,
 }
 impl ComputeVmPropertiesFragment {
@@ -1299,7 +1348,11 @@ pub struct EnvironmentDeploymentProperties {
     #[serde(rename = "armTemplateId", default, skip_serializing_if = "Option::is_none")]
     pub arm_template_id: Option<String>,
     #[doc = "The parameters of the Azure Resource Manager template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ArmTemplateParameterProperties>,
 }
 impl EnvironmentDeploymentProperties {
@@ -1356,7 +1409,11 @@ impl EvaluatePoliciesProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EvaluatePoliciesRequest {
     #[doc = "Policies to evaluate."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policies: Vec<EvaluatePoliciesProperties>,
 }
 impl EvaluatePoliciesRequest {
@@ -1368,7 +1425,11 @@ impl EvaluatePoliciesRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EvaluatePoliciesResponse {
     #[doc = "Results of evaluating a policy set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub results: Vec<PolicySetResult>,
 }
 impl EvaluatePoliciesResponse {
@@ -1684,7 +1745,11 @@ pub struct GenerateArmTemplateRequest {
     #[serde(rename = "virtualMachineName", default, skip_serializing_if = "Option::is_none")]
     pub virtual_machine_name: Option<String>,
     #[doc = "The parameters of the ARM template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ParameterInfo>,
     #[doc = "The location of the virtual machine."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2025,10 +2090,20 @@ pub struct LabCostProperties {
     #[serde(rename = "labCostSummary", default, skip_serializing_if = "Option::is_none")]
     pub lab_cost_summary: Option<LabCostSummaryProperties>,
     #[doc = "The lab cost details component of the cost data."]
-    #[serde(rename = "labCostDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "labCostDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub lab_cost_details: Vec<LabCostDetailsProperties>,
     #[doc = "The resource cost component of the cost data."]
-    #[serde(rename = "resourceCosts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceCosts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_costs: Vec<LabResourceCostProperties>,
     #[doc = "The currency code of the cost."]
     #[serde(rename = "currencyCode", default, skip_serializing_if = "Option::is_none")]
@@ -2437,7 +2512,11 @@ pub struct LabVirtualMachineCreationParameterProperties {
     #[serde(rename = "disallowPublicIpAddress", default, skip_serializing_if = "Option::is_none")]
     pub disallow_public_ip_address: Option<bool>,
     #[doc = "The artifacts to be installed on the virtual machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ArtifactInstallProperties>,
     #[doc = "Properties of an artifact deployment."]
     #[serde(rename = "artifactDeploymentStatus", default, skip_serializing_if = "Option::is_none")]
@@ -2593,7 +2672,11 @@ pub struct LabVirtualMachineProperties {
     #[serde(rename = "disallowPublicIpAddress", default, skip_serializing_if = "Option::is_none")]
     pub disallow_public_ip_address: Option<bool>,
     #[doc = "The artifacts to be installed on the virtual machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ArtifactInstallProperties>,
     #[doc = "Properties of an artifact deployment."]
     #[serde(rename = "artifactDeploymentStatus", default, skip_serializing_if = "Option::is_none")]
@@ -2732,7 +2815,11 @@ pub struct LabVirtualMachinePropertiesFragment {
     #[serde(rename = "disallowPublicIpAddress", default, skip_serializing_if = "Option::is_none")]
     pub disallow_public_ip_address: Option<bool>,
     #[doc = "The artifacts to be installed on the virtual machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ArtifactInstallPropertiesFragment>,
     #[doc = "Properties of an artifact deployment."]
     #[serde(rename = "artifactDeploymentStatus", default, skip_serializing_if = "Option::is_none")]
@@ -2982,7 +3069,11 @@ pub struct NotificationChannelProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of event for which this notification is enabled."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<Event>,
     #[doc = "The creation date of the notification channel."]
     #[serde(rename = "createdDate", default, with = "azure_core::date::rfc3339::option")]
@@ -3009,7 +3100,11 @@ pub struct NotificationChannelPropertiesFragment {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of event for which this notification is enabled."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<EventFragment>,
     #[doc = "The provisioning status of the resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3786,7 +3881,12 @@ pub struct PolicySetResult {
     #[serde(rename = "hasError", default, skip_serializing_if = "Option::is_none")]
     pub has_error: Option<bool>,
     #[doc = "The list of policy violations."]
-    #[serde(rename = "policyViolations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyViolations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_violations: Vec<PolicyViolation>,
 }
 impl PolicySetResult {
@@ -3923,7 +4023,11 @@ pub mod port_fragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderOperationResult {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationMetadata>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3968,7 +4072,11 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationArmTemplate {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArmTemplate>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3989,7 +4097,11 @@ impl ResponseWithContinuationArmTemplate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationArtifactSource {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArtifactSource>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4010,7 +4122,11 @@ impl ResponseWithContinuationArtifactSource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationArtifact {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Artifact>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4031,7 +4147,11 @@ impl ResponseWithContinuationArtifact {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationCustomImage {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomImage>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4052,7 +4172,11 @@ impl ResponseWithContinuationCustomImage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationDisk {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Disk>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4073,7 +4197,11 @@ impl ResponseWithContinuationDisk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationDtlEnvironment {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DtlEnvironment>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4094,7 +4222,11 @@ impl ResponseWithContinuationDtlEnvironment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationFormula {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Formula>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4115,7 +4247,11 @@ impl ResponseWithContinuationFormula {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationGalleryImage {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GalleryImage>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4136,7 +4272,11 @@ impl ResponseWithContinuationGalleryImage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationLabVhd {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LabVhd>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4157,7 +4297,11 @@ impl ResponseWithContinuationLabVhd {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationLabVirtualMachine {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LabVirtualMachine>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4178,7 +4322,11 @@ impl ResponseWithContinuationLabVirtualMachine {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationLab {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Lab>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4199,7 +4347,11 @@ impl ResponseWithContinuationLab {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationNotificationChannel {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotificationChannel>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4220,7 +4372,11 @@ impl ResponseWithContinuationNotificationChannel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationPolicy {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Policy>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4241,7 +4397,11 @@ impl ResponseWithContinuationPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationSchedule {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Schedule>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4262,7 +4422,11 @@ impl ResponseWithContinuationSchedule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationSecret {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Secret>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4283,7 +4447,11 @@ impl ResponseWithContinuationSecret {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationServiceRunner {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceRunner>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4304,7 +4472,11 @@ impl ResponseWithContinuationServiceRunner {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationUser {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<User>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4325,7 +4497,11 @@ impl ResponseWithContinuationUser {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationVirtualNetwork {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetwork>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4600,7 +4776,12 @@ impl ServiceRunner {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedPublicIpAddressConfiguration {
     #[doc = "The incoming NAT rules"]
-    #[serde(rename = "inboundNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_rules: Vec<InboundNatRule>,
 }
 impl SharedPublicIpAddressConfiguration {
@@ -4612,7 +4793,12 @@ impl SharedPublicIpAddressConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedPublicIpAddressConfigurationFragment {
     #[doc = "The incoming NAT rules"]
-    #[serde(rename = "inboundNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_rules: Vec<InboundNatRuleFragment>,
 }
 impl SharedPublicIpAddressConfigurationFragment {
@@ -5002,7 +5188,12 @@ pub mod subnet_override_fragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubnetSharedPublicIpAddressConfiguration {
     #[doc = "Backend ports that virtual machines on this subnet are allowed to expose"]
-    #[serde(rename = "allowedPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_ports: Vec<Port>,
 }
 impl SubnetSharedPublicIpAddressConfiguration {
@@ -5014,7 +5205,12 @@ impl SubnetSharedPublicIpAddressConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubnetSharedPublicIpAddressConfigurationFragment {
     #[doc = "Backend ports that virtual machines on this subnet are allowed to expose"]
-    #[serde(rename = "allowedPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_ports: Vec<PortFragment>,
 }
 impl SubnetSharedPublicIpAddressConfigurationFragment {
@@ -5032,7 +5228,12 @@ pub struct TargetCostProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<i32>,
     #[doc = "Cost thresholds."]
-    #[serde(rename = "costThresholds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "costThresholds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cost_thresholds: Vec<CostThresholdProperties>,
     #[doc = "Reporting cycle start date."]
     #[serde(rename = "cycleStartDateTime", default, with = "azure_core::date::rfc3339::option")]
@@ -5309,7 +5510,12 @@ impl VirtualNetworkFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkProperties {
     #[doc = "The allowed subnets of the virtual network."]
-    #[serde(rename = "allowedSubnets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedSubnets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_subnets: Vec<Subnet>,
     #[doc = "The description of the virtual network."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5318,10 +5524,20 @@ pub struct VirtualNetworkProperties {
     #[serde(rename = "externalProviderResourceId", default, skip_serializing_if = "Option::is_none")]
     pub external_provider_resource_id: Option<String>,
     #[doc = "The external subnet properties."]
-    #[serde(rename = "externalSubnets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalSubnets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_subnets: Vec<ExternalSubnet>,
     #[doc = "The subnet overrides of the virtual network."]
-    #[serde(rename = "subnetOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subnetOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnet_overrides: Vec<SubnetOverride>,
     #[doc = "The creation date of the virtual network."]
     #[serde(rename = "createdDate", default, with = "azure_core::date::rfc3339::option")]
@@ -5342,7 +5558,12 @@ impl VirtualNetworkProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkPropertiesFragment {
     #[doc = "The allowed subnets of the virtual network."]
-    #[serde(rename = "allowedSubnets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedSubnets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_subnets: Vec<SubnetFragment>,
     #[doc = "The description of the virtual network."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5351,10 +5572,20 @@ pub struct VirtualNetworkPropertiesFragment {
     #[serde(rename = "externalProviderResourceId", default, skip_serializing_if = "Option::is_none")]
     pub external_provider_resource_id: Option<String>,
     #[doc = "The external subnet properties."]
-    #[serde(rename = "externalSubnets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalSubnets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_subnets: Vec<ExternalSubnetFragment>,
     #[doc = "The subnet overrides of the virtual network."]
-    #[serde(rename = "subnetOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subnetOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnet_overrides: Vec<SubnetOverrideFragment>,
     #[doc = "The provisioning status of the resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -5372,7 +5603,11 @@ impl VirtualNetworkPropertiesFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeekDetails {
     #[doc = "The days of the week for which the schedule is set (e.g. Sunday, Monday, Tuesday, etc.)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weekdays: Vec<String>,
     #[doc = "The time of the day the schedule will occur."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5387,7 +5622,11 @@ impl WeekDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeekDetailsFragment {
     #[doc = "The days of the week for which the schedule is set (e.g. Sunday, Monday, Tuesday, etc.)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weekdays: Vec<String>,
     #[doc = "The time of the day the schedule will occur."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/devtestlabs/src/package_2018_09/models.rs b/services/mgmt/devtestlabs/src/package_2018_09/models.rs
index 3bd5ea0e47..222207461b 100644
--- a/services/mgmt/devtestlabs/src/package_2018_09/models.rs
+++ b/services/mgmt/devtestlabs/src/package_2018_09/models.rs
@@ -57,7 +57,11 @@ impl ApplicableSchedulePropertiesFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplyArtifactsRequest {
     #[doc = "The list of artifacts to apply."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ArtifactInstallProperties>,
 }
 impl ApplyArtifactsRequest {
@@ -100,7 +104,11 @@ impl ArmTemplateInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArmTemplateList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArmTemplate>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -162,7 +170,12 @@ pub struct ArmTemplateProperties {
     #[serde(rename = "createdDate", default, with = "azure_core::date::rfc3339::option")]
     pub created_date: Option<time::OffsetDateTime>,
     #[doc = "File name and parameter values information from all azuredeploy.*.parameters.json for the ARM template."]
-    #[serde(rename = "parametersValueFilesInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parametersValueFilesInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters_value_files_info: Vec<ParametersValueFileInfo>,
     #[doc = "Whether or not ARM template is enabled for use by lab user."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -225,7 +238,11 @@ pub struct ArtifactInstallProperties {
     #[serde(rename = "artifactTitle", default, skip_serializing_if = "Option::is_none")]
     pub artifact_title: Option<String>,
     #[doc = "The parameters of the artifact."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ArtifactParameterProperties>,
     #[doc = "The status of the artifact."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -257,7 +274,11 @@ impl ArtifactInstallPropertiesFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArtifactList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Artifact>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -361,7 +382,11 @@ impl ArtifactSourceFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArtifactSourceList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArtifactSource>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -639,7 +664,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Inner errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -706,7 +735,11 @@ impl ComputeVmInstanceViewStatusFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeVmProperties {
     #[doc = "Gets the statuses of the virtual machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<ComputeVmInstanceViewStatus>,
     #[doc = "Gets the OS type of the virtual machine."]
     #[serde(rename = "osType", default, skip_serializing_if = "Option::is_none")]
@@ -721,10 +754,20 @@ pub struct ComputeVmProperties {
     #[serde(rename = "osDiskId", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_id: Option<String>,
     #[doc = "Gets data disks blob uri for the virtual machine."]
-    #[serde(rename = "dataDiskIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_ids: Vec<String>,
     #[doc = "Gets all data disks attached to the virtual machine."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<ComputeDataDisk>,
 }
 impl ComputeVmProperties {
@@ -872,7 +915,11 @@ impl CustomImageFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomImageList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomImage>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -914,7 +961,12 @@ pub struct CustomImageProperties {
     #[serde(rename = "managedSnapshotId", default, skip_serializing_if = "Option::is_none")]
     pub managed_snapshot_id: Option<String>,
     #[doc = "Storage information about the data disks present in the custom image"]
-    #[serde(rename = "dataDiskStorageInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskStorageInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_storage_info: Vec<DataDiskStorageTypeInfo>,
     #[doc = "Properties for plan on a custom image."]
     #[serde(rename = "customImagePlan", default, skip_serializing_if = "Option::is_none")]
@@ -1275,7 +1327,11 @@ impl DiskFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Disk>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1416,7 +1472,11 @@ impl DtlEnvironmentFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DtlEnvironmentList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DtlEnvironment>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1440,7 +1500,11 @@ pub struct EnvironmentDeploymentProperties {
     #[serde(rename = "armTemplateId", default, skip_serializing_if = "Option::is_none")]
     pub arm_template_id: Option<String>,
     #[doc = "The parameters of the Azure Resource Manager template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ArmTemplateParameterProperties>,
 }
 impl EnvironmentDeploymentProperties {
@@ -1516,7 +1580,11 @@ impl EvaluatePoliciesProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EvaluatePoliciesRequest {
     #[doc = "Policies to evaluate."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policies: Vec<EvaluatePoliciesProperties>,
 }
 impl EvaluatePoliciesRequest {
@@ -1528,7 +1596,11 @@ impl EvaluatePoliciesRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EvaluatePoliciesResponse {
     #[doc = "Results of evaluating a policy set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub results: Vec<PolicySetResult>,
 }
 impl EvaluatePoliciesResponse {
@@ -1665,7 +1737,11 @@ impl FormulaFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FormulaList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Formula>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1763,7 +1839,11 @@ impl GalleryImage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GalleryImageList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GalleryImage>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1852,7 +1932,11 @@ pub struct GenerateArmTemplateRequest {
     #[serde(rename = "virtualMachineName", default, skip_serializing_if = "Option::is_none")]
     pub virtual_machine_name: Option<String>,
     #[doc = "The parameters of the ARM template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ParameterInfo>,
     #[doc = "The location of the virtual machine."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2277,10 +2361,20 @@ pub struct LabCostProperties {
     #[serde(rename = "labCostSummary", default, skip_serializing_if = "Option::is_none")]
     pub lab_cost_summary: Option<LabCostSummaryProperties>,
     #[doc = "The lab cost details component of the cost data."]
-    #[serde(rename = "labCostDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "labCostDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub lab_cost_details: Vec<LabCostDetailsProperties>,
     #[doc = "The resource cost component of the cost data."]
-    #[serde(rename = "resourceCosts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceCosts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_costs: Vec<LabResourceCostProperties>,
     #[doc = "The currency code of the cost."]
     #[serde(rename = "currencyCode", default, skip_serializing_if = "Option::is_none")]
@@ -2333,7 +2427,11 @@ impl LabFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LabList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Lab>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2372,10 +2470,20 @@ pub struct LabProperties {
     #[serde(rename = "labStorageType", default, skip_serializing_if = "Option::is_none")]
     pub lab_storage_type: Option<lab_properties::LabStorageType>,
     #[doc = "The ordered list of artifact resource IDs that should be applied on all Linux VM creations by default, prior to the artifacts specified by the user."]
-    #[serde(rename = "mandatoryArtifactsResourceIdsLinux", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mandatoryArtifactsResourceIdsLinux",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mandatory_artifacts_resource_ids_linux: Vec<String>,
     #[doc = "The ordered list of artifact resource IDs that should be applied on all Windows VM creations by default, prior to the artifacts specified by the user."]
-    #[serde(rename = "mandatoryArtifactsResourceIdsWindows", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mandatoryArtifactsResourceIdsWindows",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mandatory_artifacts_resource_ids_windows: Vec<String>,
     #[doc = "The creation date of the lab."]
     #[serde(rename = "createdDate", default, with = "azure_core::date::rfc3339::option")]
@@ -2664,7 +2772,11 @@ impl LabVhd {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LabVhdList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LabVhd>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2772,7 +2884,11 @@ pub struct LabVirtualMachineCreationParameterProperties {
     #[serde(rename = "disallowPublicIpAddress", default, skip_serializing_if = "Option::is_none")]
     pub disallow_public_ip_address: Option<bool>,
     #[doc = "The artifacts to be installed on the virtual machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ArtifactInstallProperties>,
     #[doc = "The reference information for an Azure Marketplace image."]
     #[serde(rename = "galleryImageReference", default, skip_serializing_if = "Option::is_none")]
@@ -2796,10 +2912,20 @@ pub struct LabVirtualMachineCreationParameterProperties {
     #[serde(rename = "environmentId", default, skip_serializing_if = "Option::is_none")]
     pub environment_id: Option<String>,
     #[doc = "New or existing data disks to attach to the virtual machine after creation"]
-    #[serde(rename = "dataDiskParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_parameters: Vec<DataDiskProperties>,
     #[doc = "Virtual Machine schedules to be created"]
-    #[serde(rename = "scheduleParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_parameters: Vec<ScheduleCreationParameter>,
 }
 impl LabVirtualMachineCreationParameterProperties {
@@ -2830,7 +2956,11 @@ impl LabVirtualMachineFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LabVirtualMachineList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LabVirtualMachine>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2905,7 +3035,11 @@ pub struct LabVirtualMachineProperties {
     #[serde(rename = "disallowPublicIpAddress", default, skip_serializing_if = "Option::is_none")]
     pub disallow_public_ip_address: Option<bool>,
     #[doc = "The artifacts to be installed on the virtual machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ArtifactInstallProperties>,
     #[doc = "Properties of an artifact deployment."]
     #[serde(rename = "artifactDeploymentStatus", default, skip_serializing_if = "Option::is_none")]
@@ -2941,10 +3075,20 @@ pub struct LabVirtualMachineProperties {
     #[serde(rename = "environmentId", default, skip_serializing_if = "Option::is_none")]
     pub environment_id: Option<String>,
     #[doc = "New or existing data disks to attach to the virtual machine after creation"]
-    #[serde(rename = "dataDiskParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_parameters: Vec<DataDiskProperties>,
     #[doc = "Virtual Machine schedules to be created"]
-    #[serde(rename = "scheduleParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_parameters: Vec<ScheduleCreationParameter>,
     #[doc = "Last known compute power state captured in DTL"]
     #[serde(rename = "lastKnownPowerState", default, skip_serializing_if = "Option::is_none")]
@@ -3150,7 +3294,11 @@ impl NotificationChannelFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationChannelList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotificationChannel>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3183,7 +3331,11 @@ pub struct NotificationChannelProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of event for which this notification is enabled."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<Event>,
     #[doc = "The creation date of the notification channel."]
     #[serde(rename = "createdDate", default, with = "azure_core::date::rfc3339::option")]
@@ -3615,7 +3767,11 @@ impl PolicyFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Policy>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3813,7 +3969,12 @@ pub struct PolicySetResult {
     #[serde(rename = "hasError", default, skip_serializing_if = "Option::is_none")]
     pub has_error: Option<bool>,
     #[doc = "The list of policy violations."]
-    #[serde(rename = "policyViolations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyViolations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_violations: Vec<PolicyViolation>,
 }
 impl PolicySetResult {
@@ -3903,7 +4064,11 @@ impl PortFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderOperationResult {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationMetadata>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4129,7 +4294,11 @@ impl ScheduleFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScheduleList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Schedule>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4272,7 +4441,11 @@ impl SecretFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecretList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Secret>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4346,7 +4519,11 @@ impl ServiceFabricFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceFabricList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceFabric>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4413,7 +4590,11 @@ impl ServiceRunner {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceRunnerList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceRunner>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4428,7 +4609,12 @@ impl ServiceRunnerList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedPublicIpAddressConfiguration {
     #[doc = "The incoming NAT rules"]
-    #[serde(rename = "inboundNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_rules: Vec<InboundNatRule>,
 }
 impl SharedPublicIpAddressConfiguration {
@@ -4680,7 +4866,12 @@ impl SubnetOverrideFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubnetSharedPublicIpAddressConfiguration {
     #[doc = "Backend ports that virtual machines on this subnet are allowed to expose"]
-    #[serde(rename = "allowedPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_ports: Vec<Port>,
 }
 impl SubnetSharedPublicIpAddressConfiguration {
@@ -4706,7 +4897,12 @@ pub struct TargetCostProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<i32>,
     #[doc = "Cost thresholds."]
-    #[serde(rename = "costThresholds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "costThresholds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cost_thresholds: Vec<CostThresholdProperties>,
     #[doc = "Reporting cycle start date."]
     #[serde(rename = "cycleStartDateTime", default, with = "azure_core::date::rfc3339::option")]
@@ -4873,7 +5069,11 @@ impl UserIdentityFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<User>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4974,7 +5174,11 @@ impl VirtualNetworkFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkList {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetwork>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4995,7 +5199,12 @@ impl VirtualNetworkList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkProperties {
     #[doc = "The allowed subnets of the virtual network."]
-    #[serde(rename = "allowedSubnets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedSubnets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_subnets: Vec<Subnet>,
     #[doc = "The description of the virtual network."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5004,10 +5213,20 @@ pub struct VirtualNetworkProperties {
     #[serde(rename = "externalProviderResourceId", default, skip_serializing_if = "Option::is_none")]
     pub external_provider_resource_id: Option<String>,
     #[doc = "The external subnet properties."]
-    #[serde(rename = "externalSubnets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalSubnets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_subnets: Vec<ExternalSubnet>,
     #[doc = "The subnet overrides of the virtual network."]
-    #[serde(rename = "subnetOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subnetOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnet_overrides: Vec<SubnetOverride>,
     #[doc = "The creation date of the virtual network."]
     #[serde(rename = "createdDate", default, with = "azure_core::date::rfc3339::option")]
@@ -5036,7 +5255,11 @@ impl VirtualNetworkPropertiesFragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeekDetails {
     #[doc = "The days of the week for which the schedule is set (e.g. Sunday, Monday, Tuesday, etc.)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weekdays: Vec<String>,
     #[doc = "The time of the day the schedule will occur."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/dfp/src/package_2021_02_01_preview/models.rs b/services/mgmt/dfp/src/package_2021_02_01_preview/models.rs
index 080e7ded51..ae1782884b 100644
--- a/services/mgmt/dfp/src/package_2021_02_01_preview/models.rs
+++ b/services/mgmt/dfp/src/package_2021_02_01_preview/models.rs
@@ -68,7 +68,11 @@ impl DfpInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DfpInstanceAdministrators {
     #[doc = "An array of administrator user identities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub members: Vec<String>,
 }
 impl DfpInstanceAdministrators {
@@ -225,10 +229,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -404,7 +417,11 @@ impl OperationDisplayValue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/digitaltwins/src/package_2020_03_01_preview/models.rs b/services/mgmt/digitaltwins/src/package_2020_03_01_preview/models.rs
index 28d01bc7a6..20139f0fa5 100644
--- a/services/mgmt/digitaltwins/src/package_2020_03_01_preview/models.rs
+++ b/services/mgmt/digitaltwins/src/package_2020_03_01_preview/models.rs
@@ -111,7 +111,11 @@ pub struct DigitalTwinsDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of DigitalTwins description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DigitalTwinsDescription>,
 }
 impl azure_core::Continuable for DigitalTwinsDescriptionListResult {
@@ -146,7 +150,11 @@ pub struct DigitalTwinsEndpointResourceListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of DigitalTwinsInstance Endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DigitalTwinsEndpointResource>,
 }
 impl azure_core::Continuable for DigitalTwinsEndpointResourceListResult {
@@ -442,7 +450,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -583,7 +595,11 @@ pub struct OperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of DigitalTwins operations supported by the Microsoft.DigitalTwins resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
diff --git a/services/mgmt/digitaltwins/src/package_2020_10/models.rs b/services/mgmt/digitaltwins/src/package_2020_10/models.rs
index 1c19156268..160d067c86 100644
--- a/services/mgmt/digitaltwins/src/package_2020_10/models.rs
+++ b/services/mgmt/digitaltwins/src/package_2020_10/models.rs
@@ -108,7 +108,11 @@ pub struct DigitalTwinsDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of DigitalTwins description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DigitalTwinsDescription>,
 }
 impl azure_core::Continuable for DigitalTwinsDescriptionListResult {
@@ -145,7 +149,11 @@ pub struct DigitalTwinsEndpointResourceListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of DigitalTwinsInstance Endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DigitalTwinsEndpointResource>,
 }
 impl azure_core::Continuable for DigitalTwinsEndpointResourceListResult {
@@ -410,7 +418,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -556,7 +568,11 @@ pub struct OperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of DigitalTwins operations supported by the Microsoft.DigitalTwins resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
diff --git a/services/mgmt/digitaltwins/src/package_2020_12/models.rs b/services/mgmt/digitaltwins/src/package_2020_12/models.rs
index 5d936aae2a..11368b1019 100644
--- a/services/mgmt/digitaltwins/src/package_2020_12/models.rs
+++ b/services/mgmt/digitaltwins/src/package_2020_12/models.rs
@@ -93,7 +93,12 @@ pub struct ConnectionProperties {
     #[serde(rename = "privateEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub private_endpoint: Option<serde_json::Value>,
     #[doc = "The list of group ids for the private endpoint connection."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<GroupId>,
     #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
     pub private_link_service_connection_state: Option<serde_json::Value>,
@@ -235,7 +240,11 @@ pub struct DigitalTwinsDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of DigitalTwins description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DigitalTwinsDescription>,
 }
 impl azure_core::Continuable for DigitalTwinsDescriptionListResult {
@@ -272,7 +281,11 @@ pub struct DigitalTwinsEndpointResourceListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of DigitalTwinsInstance Endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DigitalTwinsEndpointResource>,
 }
 impl azure_core::Continuable for DigitalTwinsEndpointResourceListResult {
@@ -597,7 +610,12 @@ pub struct DigitalTwinsProperties {
     #[doc = "Api endpoint to work with DigitalTwinsInstance."]
     #[serde(rename = "hostName", default, skip_serializing_if = "Option::is_none")]
     pub host_name: Option<String>,
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Public network access for the DigitalTwinsInstance."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -746,7 +764,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -880,10 +902,20 @@ pub struct GroupIdInformationProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The required members for a specific group id."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The required DNS zones for a specific group id."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl GroupIdInformationProperties {
@@ -895,7 +927,11 @@ impl GroupIdInformationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GroupIdInformationResponse {
     #[doc = "The list of available private link resources for a Digital Twin."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupIdInformation>,
 }
 impl GroupIdInformationResponse {
@@ -952,7 +988,11 @@ pub struct OperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of DigitalTwins operations supported by the Microsoft.DigitalTwins resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -1006,7 +1046,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionsResponse {
     #[doc = "The list of available private link connections for a Digital Twin."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionsResponse {
diff --git a/services/mgmt/digitaltwins/src/package_2021_06_30_preview/models.rs b/services/mgmt/digitaltwins/src/package_2021_06_30_preview/models.rs
index c0a7af0adc..971f3e353b 100644
--- a/services/mgmt/digitaltwins/src/package_2021_06_30_preview/models.rs
+++ b/services/mgmt/digitaltwins/src/package_2021_06_30_preview/models.rs
@@ -147,7 +147,12 @@ pub struct ConnectionProperties {
     #[serde(rename = "privateEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub private_endpoint: Option<PrivateEndpoint>,
     #[doc = "The list of group ids for the private endpoint connection."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<GroupId>,
     #[doc = "The connection state."]
     #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
@@ -290,7 +295,11 @@ pub struct DigitalTwinsDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of DigitalTwins description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DigitalTwinsDescription>,
 }
 impl azure_core::Continuable for DigitalTwinsDescriptionListResult {
@@ -327,7 +336,11 @@ pub struct DigitalTwinsEndpointResourceListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of DigitalTwinsInstance Endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DigitalTwinsEndpointResource>,
 }
 impl azure_core::Continuable for DigitalTwinsEndpointResourceListResult {
@@ -653,7 +666,12 @@ pub struct DigitalTwinsProperties {
     #[serde(rename = "hostName", default, skip_serializing_if = "Option::is_none")]
     pub host_name: Option<String>,
     #[doc = "The private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Public network access for the DigitalTwinsInstance."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -806,7 +824,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -944,10 +966,20 @@ pub struct GroupIdInformationProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The required members for a specific group id."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The required DNS zones for a specific group id."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl GroupIdInformationProperties {
@@ -959,7 +991,11 @@ impl GroupIdInformationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GroupIdInformationResponse {
     #[doc = "The list of available private link resources for a Digital Twin."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupIdInformation>,
 }
 impl GroupIdInformationResponse {
@@ -1019,7 +1055,11 @@ pub struct OperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of DigitalTwins operations supported by the Microsoft.DigitalTwins resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -1078,7 +1118,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionsResponse {
     #[doc = "The list of available private link connections for a Digital Twin."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionsResponse {
@@ -1248,7 +1292,11 @@ pub struct TimeSeriesDatabaseConnectionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of time series database connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TimeSeriesDatabaseConnection>,
 }
 impl azure_core::Continuable for TimeSeriesDatabaseConnectionListResult {
diff --git a/services/mgmt/digitaltwins/src/package_2022_05/models.rs b/services/mgmt/digitaltwins/src/package_2022_05/models.rs
index 09c075c20a..04f4f3e46d 100644
--- a/services/mgmt/digitaltwins/src/package_2022_05/models.rs
+++ b/services/mgmt/digitaltwins/src/package_2022_05/models.rs
@@ -147,7 +147,12 @@ pub struct ConnectionProperties {
     #[serde(rename = "privateEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub private_endpoint: Option<PrivateEndpoint>,
     #[doc = "The list of group ids for the private endpoint connection."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<GroupId>,
     #[doc = "The connection state."]
     #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
@@ -290,7 +295,11 @@ pub struct DigitalTwinsDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of DigitalTwins description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DigitalTwinsDescription>,
 }
 impl azure_core::Continuable for DigitalTwinsDescriptionListResult {
@@ -327,7 +336,11 @@ pub struct DigitalTwinsEndpointResourceListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of DigitalTwinsInstance Endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DigitalTwinsEndpointResource>,
 }
 impl azure_core::Continuable for DigitalTwinsEndpointResourceListResult {
@@ -655,7 +668,12 @@ pub struct DigitalTwinsProperties {
     #[serde(rename = "hostName", default, skip_serializing_if = "Option::is_none")]
     pub host_name: Option<String>,
     #[doc = "The private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Public network access for the DigitalTwinsInstance."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -808,7 +826,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -946,10 +968,20 @@ pub struct GroupIdInformationProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The required members for a specific group id."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The required DNS zones for a specific group id."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl GroupIdInformationProperties {
@@ -961,7 +993,11 @@ impl GroupIdInformationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GroupIdInformationResponse {
     #[doc = "The list of available private link resources for a Digital Twin."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupIdInformation>,
 }
 impl GroupIdInformationResponse {
@@ -1021,7 +1057,11 @@ pub struct OperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of DigitalTwins operations supported by the Microsoft.DigitalTwins resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -1080,7 +1120,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionsResponse {
     #[doc = "The list of available private link connections for a Digital Twin."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionsResponse {
@@ -1250,7 +1294,11 @@ pub struct TimeSeriesDatabaseConnectionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of time series database connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TimeSeriesDatabaseConnection>,
 }
 impl azure_core::Continuable for TimeSeriesDatabaseConnectionListResult {
diff --git a/services/mgmt/dnc/src/package_2020_08_08_preview/models.rs b/services/mgmt/dnc/src/package_2020_08_08_preview/models.rs
index b384520e04..1e0b223262 100644
--- a/services/mgmt/dnc/src/package_2020_08_08_preview/models.rs
+++ b/services/mgmt/dnc/src/package_2020_08_08_preview/models.rs
@@ -292,10 +292,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -450,7 +459,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/dnc/src/package_2021_03_15/models.rs b/services/mgmt/dnc/src/package_2021_03_15/models.rs
index 2bc1c894e8..49fe1d5f56 100644
--- a/services/mgmt/dnc/src/package_2021_03_15/models.rs
+++ b/services/mgmt/dnc/src/package_2021_03_15/models.rs
@@ -292,10 +292,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -450,7 +459,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/dns/src/package_2017_09/models.rs b/services/mgmt/dns/src/package_2017_09/models.rs
index b2553f281c..b5df150aca 100644
--- a/services/mgmt/dns/src/package_2017_09/models.rs
+++ b/services/mgmt/dns/src/package_2017_09/models.rs
@@ -76,7 +76,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -163,7 +167,11 @@ impl RecordSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecordSetListResult {
     #[doc = "Information about the record sets in the response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecordSet>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -193,25 +201,60 @@ pub struct RecordSetProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub fqdn: Option<String>,
     #[doc = "The list of A records in the record set."]
-    #[serde(rename = "ARecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ARecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub a_records: Vec<ARecord>,
     #[doc = "The list of AAAA records in the record set."]
-    #[serde(rename = "AAAARecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "AAAARecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aaaa_records: Vec<AaaaRecord>,
     #[doc = "The list of MX records in the record set."]
-    #[serde(rename = "MXRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "MXRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mx_records: Vec<MxRecord>,
     #[doc = "The list of NS records in the record set."]
-    #[serde(rename = "NSRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NSRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ns_records: Vec<NsRecord>,
     #[doc = "The list of PTR records in the record set."]
-    #[serde(rename = "PTRRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PTRRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ptr_records: Vec<PtrRecord>,
     #[doc = "The list of SRV records in the record set."]
-    #[serde(rename = "SRVRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SRVRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub srv_records: Vec<SrvRecord>,
     #[doc = "The list of TXT records in the record set."]
-    #[serde(rename = "TXTRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "TXTRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub txt_records: Vec<TxtRecord>,
     #[doc = "A CNAME record."]
     #[serde(rename = "CNAMERecord", default, skip_serializing_if = "Option::is_none")]
@@ -220,7 +263,12 @@ pub struct RecordSetProperties {
     #[serde(rename = "SOARecord", default, skip_serializing_if = "Option::is_none")]
     pub soa_record: Option<SoaRecord>,
     #[doc = "The list of CAA records in the record set."]
-    #[serde(rename = "caaRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "caaRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub caa_records: Vec<CaaRecord>,
 }
 impl RecordSetProperties {
@@ -345,7 +393,11 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TxtRecord {
     #[doc = "The text value of this TXT record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl TxtRecord {
@@ -378,7 +430,11 @@ impl Zone {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ZoneListResult {
     #[doc = "Information about the DNS zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Zone>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -408,7 +464,12 @@ pub struct ZoneProperties {
     #[serde(rename = "numberOfRecordSets", default, skip_serializing_if = "Option::is_none")]
     pub number_of_record_sets: Option<i64>,
     #[doc = "The name servers for this DNS zone. This is a read-only property and any attempt to set this value will be ignored."]
-    #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nameServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name_servers: Vec<String>,
     #[doc = "The type of this DNS zone (Public or Private)."]
     #[serde(rename = "zoneType", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/dns/src/package_2017_10/models.rs b/services/mgmt/dns/src/package_2017_10/models.rs
index 72b94ba229..e7b5e97f56 100644
--- a/services/mgmt/dns/src/package_2017_10/models.rs
+++ b/services/mgmt/dns/src/package_2017_10/models.rs
@@ -76,7 +76,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -163,7 +167,11 @@ impl RecordSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecordSetListResult {
     #[doc = "Information about the record sets in the response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecordSet>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -193,25 +201,60 @@ pub struct RecordSetProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub fqdn: Option<String>,
     #[doc = "The list of A records in the record set."]
-    #[serde(rename = "ARecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ARecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub a_records: Vec<ARecord>,
     #[doc = "The list of AAAA records in the record set."]
-    #[serde(rename = "AAAARecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "AAAARecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aaaa_records: Vec<AaaaRecord>,
     #[doc = "The list of MX records in the record set."]
-    #[serde(rename = "MXRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "MXRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mx_records: Vec<MxRecord>,
     #[doc = "The list of NS records in the record set."]
-    #[serde(rename = "NSRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NSRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ns_records: Vec<NsRecord>,
     #[doc = "The list of PTR records in the record set."]
-    #[serde(rename = "PTRRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PTRRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ptr_records: Vec<PtrRecord>,
     #[doc = "The list of SRV records in the record set."]
-    #[serde(rename = "SRVRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SRVRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub srv_records: Vec<SrvRecord>,
     #[doc = "The list of TXT records in the record set."]
-    #[serde(rename = "TXTRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "TXTRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub txt_records: Vec<TxtRecord>,
     #[doc = "A CNAME record."]
     #[serde(rename = "CNAMERecord", default, skip_serializing_if = "Option::is_none")]
@@ -220,7 +263,12 @@ pub struct RecordSetProperties {
     #[serde(rename = "SOARecord", default, skip_serializing_if = "Option::is_none")]
     pub soa_record: Option<SoaRecord>,
     #[doc = "The list of CAA records in the record set."]
-    #[serde(rename = "caaRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "caaRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub caa_records: Vec<CaaRecord>,
 }
 impl RecordSetProperties {
@@ -345,7 +393,11 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TxtRecord {
     #[doc = "The text value of this TXT record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl TxtRecord {
@@ -378,7 +430,11 @@ impl Zone {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ZoneListResult {
     #[doc = "Information about the DNS zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Zone>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -408,7 +464,12 @@ pub struct ZoneProperties {
     #[serde(rename = "numberOfRecordSets", default, skip_serializing_if = "Option::is_none")]
     pub number_of_record_sets: Option<i64>,
     #[doc = "The name servers for this DNS zone. This is a read-only property and any attempt to set this value will be ignored."]
-    #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nameServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name_servers: Vec<String>,
     #[doc = "The type of this DNS zone (Public or Private)."]
     #[serde(rename = "zoneType", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/dns/src/package_2018_03_preview/models.rs b/services/mgmt/dns/src/package_2018_03_preview/models.rs
index 01c085e1c3..3e67cf24fb 100644
--- a/services/mgmt/dns/src/package_2018_03_preview/models.rs
+++ b/services/mgmt/dns/src/package_2018_03_preview/models.rs
@@ -76,7 +76,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -163,7 +167,11 @@ impl RecordSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecordSetListResult {
     #[doc = "Information about the record sets in the response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecordSet>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -193,25 +201,60 @@ pub struct RecordSetProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub fqdn: Option<String>,
     #[doc = "The list of A records in the record set."]
-    #[serde(rename = "ARecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ARecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub a_records: Vec<ARecord>,
     #[doc = "The list of AAAA records in the record set."]
-    #[serde(rename = "AAAARecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "AAAARecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aaaa_records: Vec<AaaaRecord>,
     #[doc = "The list of MX records in the record set."]
-    #[serde(rename = "MXRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "MXRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mx_records: Vec<MxRecord>,
     #[doc = "The list of NS records in the record set."]
-    #[serde(rename = "NSRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NSRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ns_records: Vec<NsRecord>,
     #[doc = "The list of PTR records in the record set."]
-    #[serde(rename = "PTRRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PTRRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ptr_records: Vec<PtrRecord>,
     #[doc = "The list of SRV records in the record set."]
-    #[serde(rename = "SRVRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SRVRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub srv_records: Vec<SrvRecord>,
     #[doc = "The list of TXT records in the record set."]
-    #[serde(rename = "TXTRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "TXTRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub txt_records: Vec<TxtRecord>,
     #[doc = "A CNAME record."]
     #[serde(rename = "CNAMERecord", default, skip_serializing_if = "Option::is_none")]
@@ -220,7 +263,12 @@ pub struct RecordSetProperties {
     #[serde(rename = "SOARecord", default, skip_serializing_if = "Option::is_none")]
     pub soa_record: Option<SoaRecord>,
     #[doc = "The list of CAA records in the record set."]
-    #[serde(rename = "caaRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "caaRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub caa_records: Vec<CaaRecord>,
 }
 impl RecordSetProperties {
@@ -345,7 +393,11 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TxtRecord {
     #[doc = "The text value of this TXT record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl TxtRecord {
@@ -378,7 +430,11 @@ impl Zone {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ZoneListResult {
     #[doc = "Information about the DNS zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Zone>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -408,16 +464,31 @@ pub struct ZoneProperties {
     #[serde(rename = "numberOfRecordSets", default, skip_serializing_if = "Option::is_none")]
     pub number_of_record_sets: Option<i64>,
     #[doc = "The name servers for this DNS zone. This is a read-only property and any attempt to set this value will be ignored."]
-    #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nameServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name_servers: Vec<String>,
     #[doc = "The type of this DNS zone (Public or Private)."]
     #[serde(rename = "zoneType", default, skip_serializing_if = "Option::is_none")]
     pub zone_type: Option<zone_properties::ZoneType>,
     #[doc = "A list of references to virtual networks that register hostnames in this DNS zone. This is a only when ZoneType is Private."]
-    #[serde(rename = "registrationVirtualNetworks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "registrationVirtualNetworks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub registration_virtual_networks: Vec<SubResource>,
     #[doc = "A list of references to virtual networks that resolve records in this DNS zone. This is a only when ZoneType is Private."]
-    #[serde(rename = "resolutionVirtualNetworks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resolutionVirtualNetworks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resolution_virtual_networks: Vec<SubResource>,
 }
 impl ZoneProperties {
diff --git a/services/mgmt/dns/src/package_2018_05/models.rs b/services/mgmt/dns/src/package_2018_05/models.rs
index d20d0f6516..97651344af 100644
--- a/services/mgmt/dns/src/package_2018_05/models.rs
+++ b/services/mgmt/dns/src/package_2018_05/models.rs
@@ -76,7 +76,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -100,7 +104,12 @@ impl CnameRecord {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DnsResourceReference {
     #[doc = "A list of dns Records "]
-    #[serde(rename = "dnsResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_resources: Vec<SubResource>,
     #[doc = "A reference to a another resource"]
     #[serde(rename = "targetResource", default, skip_serializing_if = "Option::is_none")]
@@ -127,7 +136,12 @@ impl DnsResourceReferenceRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DnsResourceReferenceRequestProperties {
     #[doc = "A list of references to azure resources for which referencing dns records need to be queried."]
-    #[serde(rename = "targetResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_resources: Vec<SubResource>,
 }
 impl DnsResourceReferenceRequestProperties {
@@ -151,7 +165,12 @@ impl DnsResourceReferenceResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DnsResourceReferenceResultProperties {
     #[doc = "The result of dns resource reference request. A list of dns resource references for each of the azure resource in the request"]
-    #[serde(rename = "dnsResourceReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsResourceReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_resource_references: Vec<DnsResourceReference>,
 }
 impl DnsResourceReferenceResultProperties {
@@ -226,7 +245,11 @@ impl RecordSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecordSetListResult {
     #[doc = "Information about the record sets in the response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecordSet>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -262,25 +285,60 @@ pub struct RecordSetProperties {
     #[serde(rename = "targetResource", default, skip_serializing_if = "Option::is_none")]
     pub target_resource: Option<SubResource>,
     #[doc = "The list of A records in the record set."]
-    #[serde(rename = "ARecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ARecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub a_records: Vec<ARecord>,
     #[doc = "The list of AAAA records in the record set."]
-    #[serde(rename = "AAAARecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "AAAARecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aaaa_records: Vec<AaaaRecord>,
     #[doc = "The list of MX records in the record set."]
-    #[serde(rename = "MXRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "MXRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mx_records: Vec<MxRecord>,
     #[doc = "The list of NS records in the record set."]
-    #[serde(rename = "NSRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NSRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ns_records: Vec<NsRecord>,
     #[doc = "The list of PTR records in the record set."]
-    #[serde(rename = "PTRRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PTRRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ptr_records: Vec<PtrRecord>,
     #[doc = "The list of SRV records in the record set."]
-    #[serde(rename = "SRVRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SRVRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub srv_records: Vec<SrvRecord>,
     #[doc = "The list of TXT records in the record set."]
-    #[serde(rename = "TXTRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "TXTRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub txt_records: Vec<TxtRecord>,
     #[doc = "A CNAME record."]
     #[serde(rename = "CNAMERecord", default, skip_serializing_if = "Option::is_none")]
@@ -289,7 +347,12 @@ pub struct RecordSetProperties {
     #[serde(rename = "SOARecord", default, skip_serializing_if = "Option::is_none")]
     pub soa_record: Option<SoaRecord>,
     #[doc = "The list of CAA records in the record set."]
-    #[serde(rename = "caaRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "caaRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub caa_records: Vec<CaaRecord>,
 }
 impl RecordSetProperties {
@@ -405,7 +468,11 @@ impl SubResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TxtRecord {
     #[doc = "The text value of this TXT record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl TxtRecord {
@@ -438,7 +505,11 @@ impl Zone {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ZoneListResult {
     #[doc = "Information about the DNS zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Zone>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -468,16 +539,31 @@ pub struct ZoneProperties {
     #[serde(rename = "numberOfRecordSets", default, skip_serializing_if = "Option::is_none")]
     pub number_of_record_sets: Option<i64>,
     #[doc = "The name servers for this DNS zone. This is a read-only property and any attempt to set this value will be ignored."]
-    #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nameServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name_servers: Vec<String>,
     #[doc = "The type of this DNS zone (Public or Private)."]
     #[serde(rename = "zoneType", default, skip_serializing_if = "Option::is_none")]
     pub zone_type: Option<zone_properties::ZoneType>,
     #[doc = "A list of references to virtual networks that register hostnames in this DNS zone. This is a only when ZoneType is Private."]
-    #[serde(rename = "registrationVirtualNetworks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "registrationVirtualNetworks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub registration_virtual_networks: Vec<SubResource>,
     #[doc = "A list of references to virtual networks that resolve records in this DNS zone. This is a only when ZoneType is Private."]
-    #[serde(rename = "resolutionVirtualNetworks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resolutionVirtualNetworks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resolution_virtual_networks: Vec<SubResource>,
 }
 impl ZoneProperties {
diff --git a/services/mgmt/dns/src/profile_hybrid_2020_09_01/models.rs b/services/mgmt/dns/src/profile_hybrid_2020_09_01/models.rs
index 3487536cbd..4d043d4def 100644
--- a/services/mgmt/dns/src/profile_hybrid_2020_09_01/models.rs
+++ b/services/mgmt/dns/src/profile_hybrid_2020_09_01/models.rs
@@ -58,7 +58,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -145,7 +149,11 @@ impl RecordSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecordSetListResult {
     #[doc = "Information about the record sets in the response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecordSet>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -175,25 +183,60 @@ pub struct RecordSetProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub fqdn: Option<String>,
     #[doc = "The list of A records in the record set."]
-    #[serde(rename = "ARecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ARecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub a_records: Vec<ARecord>,
     #[doc = "The list of AAAA records in the record set."]
-    #[serde(rename = "AAAARecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "AAAARecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aaaa_records: Vec<AaaaRecord>,
     #[doc = "The list of MX records in the record set."]
-    #[serde(rename = "MXRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "MXRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mx_records: Vec<MxRecord>,
     #[doc = "The list of NS records in the record set."]
-    #[serde(rename = "NSRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NSRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ns_records: Vec<NsRecord>,
     #[doc = "The list of PTR records in the record set."]
-    #[serde(rename = "PTRRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PTRRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ptr_records: Vec<PtrRecord>,
     #[doc = "The list of SRV records in the record set."]
-    #[serde(rename = "SRVRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SRVRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub srv_records: Vec<SrvRecord>,
     #[doc = "The list of TXT records in the record set."]
-    #[serde(rename = "TXTRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "TXTRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub txt_records: Vec<TxtRecord>,
     #[doc = "A CNAME record."]
     #[serde(rename = "CNAMERecord", default, skip_serializing_if = "Option::is_none")]
@@ -323,7 +366,11 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TxtRecord {
     #[doc = "The text value of this TXT record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl TxtRecord {
@@ -434,7 +481,11 @@ pub mod zone_delete_result {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ZoneListResult {
     #[doc = "Information about the DNS zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Zone>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -464,7 +515,12 @@ pub struct ZoneProperties {
     #[serde(rename = "numberOfRecordSets", default, skip_serializing_if = "Option::is_none")]
     pub number_of_record_sets: Option<i64>,
     #[doc = "The name servers for this DNS zone. This is a read-only property and any attempt to set this value will be ignored."]
-    #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nameServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name_servers: Vec<String>,
     #[doc = "The type of this DNS zone (Public or Private)."]
     #[serde(rename = "zoneType", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/dnsresolver/src/package_2020_04_preview/models.rs b/services/mgmt/dnsresolver/src/package_2020_04_preview/models.rs
index 4ff969a8b3..c27d8e8bc9 100644
--- a/services/mgmt/dnsresolver/src/package_2020_04_preview/models.rs
+++ b/services/mgmt/dnsresolver/src/package_2020_04_preview/models.rs
@@ -34,7 +34,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Extra error information"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -71,7 +75,11 @@ impl DnsForwardingRuleset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DnsForwardingRulesetListResult {
     #[doc = "Enumeration of the DNS forwarding rulesets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DnsForwardingRuleset>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -104,7 +112,12 @@ impl DnsForwardingRulesetPatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DnsForwardingRulesetProperties {
     #[doc = "The reference to the DNS resolver outbound endpoints that are used to route DNS queries matching the forwarding rules in the ruleset to the target DNS servers."]
-    #[serde(rename = "dnsResolverOutboundEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsResolverOutboundEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_resolver_outbound_endpoints: Vec<SubResource>,
     #[doc = "The current provisioning state of the resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -147,7 +160,11 @@ impl DnsResolver {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DnsResolverListResult {
     #[doc = "Enumeration of the DNS resolvers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DnsResolver>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -266,7 +283,11 @@ impl ForwardingRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ForwardingRuleListResult {
     #[doc = "Enumeration of the forwarding rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ForwardingRule>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -299,7 +320,12 @@ impl ForwardingRulePatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ForwardingRulePatchProperties {
     #[doc = "DNS servers to forward the DNS query to."]
-    #[serde(rename = "targetDnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetDnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_dns_servers: Vec<TargetDnsServer>,
     #[doc = "Metadata attached to the forwarding rule."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -457,7 +483,11 @@ impl InboundEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InboundEndpointListResult {
     #[doc = "Enumeration of the inbound endpoints for a DNS resolver."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InboundEndpoint>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -490,7 +520,12 @@ impl InboundEndpointPatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InboundEndpointProperties {
     #[doc = "IP configurations for the inbound endpoint."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<IpConfiguration>,
     #[doc = "The current provisioning state of the resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -596,7 +631,11 @@ impl OutboundEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OutboundEndpointListResult {
     #[doc = "Enumeration of the outbound endpoints for a DNS resolver."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OutboundEndpoint>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -734,7 +773,11 @@ impl SubResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubResourceListResult {
     #[doc = "Enumeration of the sub-resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubResource>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -805,7 +848,11 @@ impl VirtualNetworkDnsForwardingRuleset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkDnsForwardingRulesetListResult {
     #[doc = "Enumeration of the Virtual Network DNS Forwarding Ruleset."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkDnsForwardingRuleset>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -846,7 +893,11 @@ impl VirtualNetworkLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkLinkListResult {
     #[doc = "Enumeration of the virtual network links."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkLink>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/dnsresolver/src/package_2022_07/models.rs b/services/mgmt/dnsresolver/src/package_2022_07/models.rs
index e16cbddd11..98db88bec0 100644
--- a/services/mgmt/dnsresolver/src/package_2022_07/models.rs
+++ b/services/mgmt/dnsresolver/src/package_2022_07/models.rs
@@ -34,7 +34,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Extra error information"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -70,7 +74,11 @@ impl DnsForwardingRuleset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DnsForwardingRulesetListResult {
     #[doc = "Enumeration of the DNS forwarding rulesets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DnsForwardingRuleset>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -91,7 +99,12 @@ impl DnsForwardingRulesetListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DnsForwardingRulesetPatch {
     #[doc = "The reference to the DNS resolver outbound endpoints that are used to route DNS queries matching the forwarding rules in the ruleset to the target DNS servers."]
-    #[serde(rename = "dnsResolverOutboundEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsResolverOutboundEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_resolver_outbound_endpoints: Vec<SubResource>,
     #[doc = "Tags for DNS Resolver."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -152,7 +165,11 @@ impl DnsResolver {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DnsResolverListResult {
     #[doc = "Enumeration of the DNS resolvers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DnsResolver>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -275,7 +292,11 @@ impl ForwardingRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ForwardingRuleListResult {
     #[doc = "Enumeration of the forwarding rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ForwardingRule>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -308,7 +329,12 @@ impl ForwardingRulePatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ForwardingRulePatchProperties {
     #[doc = "DNS servers to forward the DNS query to."]
-    #[serde(rename = "targetDnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetDnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_dns_servers: Vec<TargetDnsServer>,
     #[doc = "Metadata attached to the forwarding rule."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -465,7 +491,11 @@ impl InboundEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InboundEndpointListResult {
     #[doc = "Enumeration of the inbound endpoints for a DNS resolver."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InboundEndpoint>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -610,7 +640,11 @@ impl OutboundEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OutboundEndpointListResult {
     #[doc = "Enumeration of the outbound endpoints for a DNS resolver."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OutboundEndpoint>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -750,7 +784,11 @@ impl SubResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubResourceListResult {
     #[doc = "Enumeration of the sub-resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubResource>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -821,7 +859,11 @@ impl VirtualNetworkDnsForwardingRuleset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkDnsForwardingRulesetListResult {
     #[doc = "Enumeration of the Virtual Network DNS Forwarding Ruleset."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkDnsForwardingRuleset>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -866,7 +908,11 @@ impl VirtualNetworkLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkLinkListResult {
     #[doc = "Enumeration of the virtual network links."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkLink>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/domainservices/src/package_2017_01/models.rs b/services/mgmt/domainservices/src/package_2017_01/models.rs
index 99c7347610..37430e0153 100644
--- a/services/mgmt/domainservices/src/package_2017_01/models.rs
+++ b/services/mgmt/domainservices/src/package_2017_01/models.rs
@@ -153,7 +153,11 @@ impl DomainService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainServiceListResult {
     #[doc = "the list of domain services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DomainService>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -195,10 +199,20 @@ pub struct DomainServiceProperties {
     #[serde(rename = "healthLastEvaluated", default, with = "azure_core::date::rfc1123::option")]
     pub health_last_evaluated: Option<time::OffsetDateTime>,
     #[doc = "List of Domain Health Monitors"]
-    #[serde(rename = "healthMonitors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthMonitors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_monitors: Vec<HealthMonitor>,
     #[doc = "List of Domain Health Alerts"]
-    #[serde(rename = "healthAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_alerts: Vec<HealthAlert>,
     #[doc = "Settings for notification"]
     #[serde(rename = "notificationSettings", default, skip_serializing_if = "Option::is_none")]
@@ -210,7 +224,12 @@ pub struct DomainServiceProperties {
     #[serde(rename = "filteredSync", default, skip_serializing_if = "Option::is_none")]
     pub filtered_sync: Option<domain_service_properties::FilteredSync>,
     #[doc = "List of Domain Controller IP Address"]
-    #[serde(rename = "domainControllerIpAddress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "domainControllerIpAddress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domain_controller_ip_address: Vec<String>,
     #[doc = "Status of Domain Service instance"]
     #[serde(rename = "serviceStatus", default, skip_serializing_if = "Option::is_none")]
@@ -432,7 +451,12 @@ pub struct NotificationSettings {
     #[serde(rename = "notifyDcAdmins", default, skip_serializing_if = "Option::is_none")]
     pub notify_dc_admins: Option<notification_settings::NotifyDcAdmins>,
     #[doc = "The list of additional recipients"]
-    #[serde(rename = "additionalRecipients", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalRecipients",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_recipients: Vec<String>,
 }
 impl NotificationSettings {
@@ -560,7 +584,11 @@ impl OperationEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationEntityListResult {
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/domainservices/src/package_2017_06/models.rs b/services/mgmt/domainservices/src/package_2017_06/models.rs
index e42808812f..565aa79646 100644
--- a/services/mgmt/domainservices/src/package_2017_06/models.rs
+++ b/services/mgmt/domainservices/src/package_2017_06/models.rs
@@ -34,7 +34,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -93,7 +97,11 @@ pub mod default_error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "Error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<serde_json::Value>,
         #[doc = "More information to debug error."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -360,7 +368,11 @@ impl DomainService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainServiceListResult {
     #[doc = "the list of domain services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DomainService>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -417,10 +429,20 @@ pub struct DomainServiceProperties {
     #[serde(rename = "healthLastEvaluated", default, with = "azure_core::date::rfc1123::option")]
     pub health_last_evaluated: Option<time::OffsetDateTime>,
     #[doc = "List of Domain Health Monitors"]
-    #[serde(rename = "healthMonitors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthMonitors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_monitors: Vec<HealthMonitor>,
     #[doc = "List of Domain Health Alerts"]
-    #[serde(rename = "healthAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_alerts: Vec<HealthAlert>,
     #[doc = "Settings for notification"]
     #[serde(rename = "notificationSettings", default, skip_serializing_if = "Option::is_none")]
@@ -432,7 +454,12 @@ pub struct DomainServiceProperties {
     #[serde(rename = "filteredSync", default, skip_serializing_if = "Option::is_none")]
     pub filtered_sync: Option<domain_service_properties::FilteredSync>,
     #[doc = "List of Domain Controller IP Address"]
-    #[serde(rename = "domainControllerIpAddress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "domainControllerIpAddress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domain_controller_ip_address: Vec<String>,
     #[doc = "Status of Domain Service instance"]
     #[serde(rename = "serviceStatus", default, skip_serializing_if = "Option::is_none")]
@@ -721,7 +748,12 @@ pub struct NotificationSettings {
     #[serde(rename = "notifyDcAdmins", default, skip_serializing_if = "Option::is_none")]
     pub notify_dc_admins: Option<notification_settings::NotifyDcAdmins>,
     #[doc = "The list of additional recipients"]
-    #[serde(rename = "additionalRecipients", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalRecipients",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_recipients: Vec<String>,
 }
 impl NotificationSettings {
@@ -849,7 +881,11 @@ impl OperationEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationEntityListResult {
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -884,7 +920,11 @@ impl OuContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OuContainerListResult {
     #[doc = "The list of OuContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OuContainer>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -917,7 +957,11 @@ pub struct OuContainerProperties {
     #[serde(rename = "containerId", default, skip_serializing_if = "Option::is_none")]
     pub container_id: Option<String>,
     #[doc = "The list of container accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accounts: Vec<ContainerAccount>,
     #[doc = "Status of OuContainer instance"]
     #[serde(rename = "serviceStatus", default, skip_serializing_if = "Option::is_none")]
@@ -965,7 +1009,11 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceForestSettings {
     #[doc = "List of settings for Resource Forest"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub settings: Vec<ForestTrust>,
     #[doc = "Resource Forest"]
     #[serde(rename = "resourceForest", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/domainservices/src/package_2020_01/models.rs b/services/mgmt/domainservices/src/package_2020_01/models.rs
index b84216dc1c..a595a3d73e 100644
--- a/services/mgmt/domainservices/src/package_2020_01/models.rs
+++ b/services/mgmt/domainservices/src/package_2020_01/models.rs
@@ -34,7 +34,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -315,7 +319,11 @@ impl DomainService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainServiceListResult {
     #[doc = "the list of domain services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DomainService>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -351,7 +359,12 @@ pub struct DomainServiceProperties {
     #[serde(rename = "syncOwner", default, skip_serializing_if = "Option::is_none")]
     pub sync_owner: Option<String>,
     #[doc = "List of ReplicaSets"]
-    #[serde(rename = "replicaSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replicaSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_sets: Vec<ReplicaSet>,
     #[doc = "Secure LDAP Settings"]
     #[serde(rename = "ldapsSettings", default, skip_serializing_if = "Option::is_none")]
@@ -658,7 +671,12 @@ pub struct NotificationSettings {
     #[serde(rename = "notifyDcAdmins", default, skip_serializing_if = "Option::is_none")]
     pub notify_dc_admins: Option<notification_settings::NotifyDcAdmins>,
     #[doc = "The list of additional recipients"]
-    #[serde(rename = "additionalRecipients", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalRecipients",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_recipients: Vec<String>,
 }
 impl NotificationSettings {
@@ -786,7 +804,11 @@ impl OperationEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationEntityListResult {
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -821,7 +843,11 @@ impl OuContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OuContainerListResult {
     #[doc = "The list of OuContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OuContainer>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -854,7 +880,11 @@ pub struct OuContainerProperties {
     #[serde(rename = "containerId", default, skip_serializing_if = "Option::is_none")]
     pub container_id: Option<String>,
     #[doc = "The list of container accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accounts: Vec<ContainerAccount>,
     #[doc = "Status of OuContainer instance"]
     #[serde(rename = "serviceStatus", default, skip_serializing_if = "Option::is_none")]
@@ -887,7 +917,12 @@ pub struct ReplicaSet {
     #[serde(rename = "subnetId", default, skip_serializing_if = "Option::is_none")]
     pub subnet_id: Option<String>,
     #[doc = "List of Domain Controller IP Address"]
-    #[serde(rename = "domainControllerIpAddress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "domainControllerIpAddress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domain_controller_ip_address: Vec<String>,
     #[doc = "External access ip address."]
     #[serde(rename = "externalAccessIpAddress", default, skip_serializing_if = "Option::is_none")]
@@ -899,10 +934,20 @@ pub struct ReplicaSet {
     #[serde(rename = "healthLastEvaluated", default, with = "azure_core::date::rfc1123::option")]
     pub health_last_evaluated: Option<time::OffsetDateTime>,
     #[doc = "List of Domain Health Monitors"]
-    #[serde(rename = "healthMonitors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthMonitors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_monitors: Vec<HealthMonitor>,
     #[doc = "List of Domain Health Alerts"]
-    #[serde(rename = "healthAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_alerts: Vec<HealthAlert>,
 }
 impl ReplicaSet {
@@ -941,7 +986,11 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceForestSettings {
     #[doc = "List of settings for Resource Forest"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub settings: Vec<ForestTrust>,
     #[doc = "Resource Forest"]
     #[serde(rename = "resourceForest", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/domainservices/src/package_2021_03/models.rs b/services/mgmt/domainservices/src/package_2021_03/models.rs
index 82f1a3b16a..6c3702c816 100644
--- a/services/mgmt/domainservices/src/package_2021_03/models.rs
+++ b/services/mgmt/domainservices/src/package_2021_03/models.rs
@@ -34,7 +34,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -405,7 +409,11 @@ impl DomainService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainServiceListResult {
     #[doc = "the list of domain services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DomainService>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -441,7 +449,12 @@ pub struct DomainServiceProperties {
     #[serde(rename = "syncOwner", default, skip_serializing_if = "Option::is_none")]
     pub sync_owner: Option<String>,
     #[doc = "List of ReplicaSets"]
-    #[serde(rename = "replicaSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replicaSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_sets: Vec<ReplicaSet>,
     #[doc = "Secure LDAP Settings"]
     #[serde(rename = "ldapsSettings", default, skip_serializing_if = "Option::is_none")]
@@ -748,7 +761,12 @@ pub struct NotificationSettings {
     #[serde(rename = "notifyDcAdmins", default, skip_serializing_if = "Option::is_none")]
     pub notify_dc_admins: Option<notification_settings::NotifyDcAdmins>,
     #[doc = "The list of additional recipients"]
-    #[serde(rename = "additionalRecipients", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalRecipients",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_recipients: Vec<String>,
 }
 impl NotificationSettings {
@@ -876,7 +894,11 @@ impl OperationEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationEntityListResult {
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -911,7 +933,11 @@ impl OuContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OuContainerListResult {
     #[doc = "The list of OuContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OuContainer>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -944,7 +970,11 @@ pub struct OuContainerProperties {
     #[serde(rename = "containerId", default, skip_serializing_if = "Option::is_none")]
     pub container_id: Option<String>,
     #[doc = "The list of container accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accounts: Vec<ContainerAccount>,
     #[doc = "Status of OuContainer instance"]
     #[serde(rename = "serviceStatus", default, skip_serializing_if = "Option::is_none")]
@@ -977,7 +1007,12 @@ pub struct ReplicaSet {
     #[serde(rename = "subnetId", default, skip_serializing_if = "Option::is_none")]
     pub subnet_id: Option<String>,
     #[doc = "List of Domain Controller IP Address"]
-    #[serde(rename = "domainControllerIpAddress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "domainControllerIpAddress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domain_controller_ip_address: Vec<String>,
     #[doc = "External access ip address."]
     #[serde(rename = "externalAccessIpAddress", default, skip_serializing_if = "Option::is_none")]
@@ -989,10 +1024,20 @@ pub struct ReplicaSet {
     #[serde(rename = "healthLastEvaluated", default, with = "azure_core::date::rfc1123::option")]
     pub health_last_evaluated: Option<time::OffsetDateTime>,
     #[doc = "List of Domain Health Monitors"]
-    #[serde(rename = "healthMonitors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthMonitors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_monitors: Vec<HealthMonitor>,
     #[doc = "List of Domain Health Alerts"]
-    #[serde(rename = "healthAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_alerts: Vec<HealthAlert>,
 }
 impl ReplicaSet {
@@ -1034,7 +1079,11 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceForestSettings {
     #[doc = "List of settings for Resource Forest"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub settings: Vec<ForestTrust>,
     #[doc = "Resource Forest"]
     #[serde(rename = "resourceForest", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/domainservices/src/package_2021_05/models.rs b/services/mgmt/domainservices/src/package_2021_05/models.rs
index adf9a9e42c..83b428a8f4 100644
--- a/services/mgmt/domainservices/src/package_2021_05/models.rs
+++ b/services/mgmt/domainservices/src/package_2021_05/models.rs
@@ -34,7 +34,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -49,7 +53,12 @@ pub struct ConfigDiagnostics {
     #[serde(rename = "lastExecuted", default, with = "azure_core::date::rfc1123::option")]
     pub last_executed: Option<time::OffsetDateTime>,
     #[doc = "List of Configuration Diagnostics validator results."]
-    #[serde(rename = "validatorResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validatorResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validator_results: Vec<ConfigDiagnosticsValidatorResult>,
 }
 impl ConfigDiagnostics {
@@ -70,7 +79,11 @@ pub struct ConfigDiagnosticsValidatorResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<config_diagnostics_validator_result::Status>,
     #[doc = "List of resource config validation issues."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issues: Vec<ConfigDiagnosticsValidatorResultIssue>,
 }
 impl ConfigDiagnosticsValidatorResult {
@@ -139,7 +152,12 @@ pub struct ConfigDiagnosticsValidatorResultIssue {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "List of domain resource property name or values used to compose a rich description."]
-    #[serde(rename = "descriptionParams", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "descriptionParams",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub description_params: Vec<String>,
 }
 impl ConfigDiagnosticsValidatorResultIssue {
@@ -510,7 +528,11 @@ impl DomainService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainServiceListResult {
     #[doc = "the list of domain services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DomainService>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -546,7 +568,12 @@ pub struct DomainServiceProperties {
     #[serde(rename = "syncOwner", default, skip_serializing_if = "Option::is_none")]
     pub sync_owner: Option<String>,
     #[doc = "List of ReplicaSets"]
-    #[serde(rename = "replicaSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replicaSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_sets: Vec<ReplicaSet>,
     #[doc = "Secure LDAP Settings"]
     #[serde(rename = "ldapsSettings", default, skip_serializing_if = "Option::is_none")]
@@ -856,7 +883,12 @@ pub struct NotificationSettings {
     #[serde(rename = "notifyDcAdmins", default, skip_serializing_if = "Option::is_none")]
     pub notify_dc_admins: Option<notification_settings::NotifyDcAdmins>,
     #[doc = "The list of additional recipients"]
-    #[serde(rename = "additionalRecipients", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalRecipients",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_recipients: Vec<String>,
 }
 impl NotificationSettings {
@@ -984,7 +1016,11 @@ impl OperationEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationEntityListResult {
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1019,7 +1055,11 @@ impl OuContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OuContainerListResult {
     #[doc = "The list of OuContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OuContainer>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1052,7 +1092,11 @@ pub struct OuContainerProperties {
     #[serde(rename = "containerId", default, skip_serializing_if = "Option::is_none")]
     pub container_id: Option<String>,
     #[doc = "The list of container accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accounts: Vec<ContainerAccount>,
     #[doc = "Status of OuContainer instance"]
     #[serde(rename = "serviceStatus", default, skip_serializing_if = "Option::is_none")]
@@ -1085,7 +1129,12 @@ pub struct ReplicaSet {
     #[serde(rename = "subnetId", default, skip_serializing_if = "Option::is_none")]
     pub subnet_id: Option<String>,
     #[doc = "List of Domain Controller IP Address"]
-    #[serde(rename = "domainControllerIpAddress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "domainControllerIpAddress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domain_controller_ip_address: Vec<String>,
     #[doc = "External access ip address."]
     #[serde(rename = "externalAccessIpAddress", default, skip_serializing_if = "Option::is_none")]
@@ -1097,10 +1146,20 @@ pub struct ReplicaSet {
     #[serde(rename = "healthLastEvaluated", default, with = "azure_core::date::rfc1123::option")]
     pub health_last_evaluated: Option<time::OffsetDateTime>,
     #[doc = "List of Domain Health Monitors"]
-    #[serde(rename = "healthMonitors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthMonitors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_monitors: Vec<HealthMonitor>,
     #[doc = "List of Domain Health Alerts"]
-    #[serde(rename = "healthAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_alerts: Vec<HealthAlert>,
 }
 impl ReplicaSet {
@@ -1142,7 +1201,11 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceForestSettings {
     #[doc = "List of settings for Resource Forest"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub settings: Vec<ForestTrust>,
     #[doc = "Resource Forest"]
     #[serde(rename = "resourceForest", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/dynatrace/src/package_2021_09_01/models.rs b/services/mgmt/dynatrace/src/package_2021_09_01/models.rs
index 1948777da4..b1dd9daa5a 100644
--- a/services/mgmt/dynatrace/src/package_2021_09_01/models.rs
+++ b/services/mgmt/dynatrace/src/package_2021_09_01/models.rs
@@ -76,7 +76,11 @@ impl AppServiceInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AppServiceListResponse {
     #[doc = "The items on this page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AppServiceInfo>,
     #[doc = "The link to the next page of items"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -223,7 +227,12 @@ pub struct DynatraceSingleSignOnProperties {
     #[serde(rename = "singleSignOnUrl", default, skip_serializing_if = "Option::is_none")]
     pub single_sign_on_url: Option<String>,
     #[doc = "array of Aad(azure active directory) domains"]
-    #[serde(rename = "aadDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aadDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aad_domains: Vec<String>,
     #[doc = "Provisioning state of the monitoring resource"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -323,10 +332,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -437,7 +455,11 @@ impl Serialize for LiftrResourceCategories {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinkableEnvironmentListResponse {
     #[doc = "List of environments for which user is an admin"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkableEnvironmentResponse>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -542,7 +564,12 @@ pub struct LogRules {
     #[serde(rename = "sendActivityLogs", default, skip_serializing_if = "Option::is_none")]
     pub send_activity_logs: Option<SendActivityLogsStatus>,
     #[doc = "List of filtering tags to be used for capturing logs. This only takes effect if SendActivityLogs flag is enabled. If empty, all resources will be captured.\nIf only Exclude action is specified, the rules will apply to the list of all available resources. If Include actions are specified, the rules will only include resources with the associated tags."]
-    #[serde(rename = "filteringTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filteringTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filtering_tags: Vec<FilteringTag>,
 }
 impl LogRules {
@@ -630,7 +657,12 @@ impl Serialize for MarketplaceSubscriptionStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricRules {
     #[doc = "List of filtering tags to be used for capturing metrics. If empty, all resources will be captured. If only Exclude action is specified, the rules will apply to the list of all available resources. If Include actions are specified, the rules will only include resources with the associated tags."]
-    #[serde(rename = "filteringTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filteringTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filtering_tags: Vec<FilteringTag>,
 }
 impl MetricRules {
@@ -770,7 +802,11 @@ impl MonitoredResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoredResourceListResponse {
     #[doc = "The items on this page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoredResource>,
     #[doc = "The link to the next page of items"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1010,7 +1046,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1153,10 +1193,20 @@ pub struct SsoDetailsResponse {
     #[serde(rename = "singleSignOnUrl", default, skip_serializing_if = "Option::is_none")]
     pub single_sign_on_url: Option<String>,
     #[doc = "array of Aad(azure active directory) domains"]
-    #[serde(rename = "aadDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aadDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aad_domains: Vec<String>,
     #[doc = "Array of admin user emails."]
-    #[serde(rename = "adminUsers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "adminUsers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub admin_users: Vec<String>,
 }
 impl SsoDetailsResponse {
@@ -1658,7 +1708,11 @@ impl VmExtensionPayload {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmHostsListResponse {
     #[doc = "The items on this page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VmInfo>,
     #[doc = "The link to the next page of items"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/dynatrace/src/package_2021_09_01_preview/models.rs b/services/mgmt/dynatrace/src/package_2021_09_01_preview/models.rs
index 08ee66fb3d..fdfe8aeb44 100644
--- a/services/mgmt/dynatrace/src/package_2021_09_01_preview/models.rs
+++ b/services/mgmt/dynatrace/src/package_2021_09_01_preview/models.rs
@@ -76,7 +76,11 @@ impl AppServiceInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AppServiceListResponse {
     #[doc = "The items on this page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AppServiceInfo>,
     #[doc = "The link to the next page of items"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -223,7 +227,12 @@ pub struct DynatraceSingleSignOnProperties {
     #[serde(rename = "singleSignOnUrl", default, skip_serializing_if = "Option::is_none")]
     pub single_sign_on_url: Option<String>,
     #[doc = "array of Aad(azure active directory) domains"]
-    #[serde(rename = "aadDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aadDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aad_domains: Vec<String>,
     #[doc = "Provisioning state of the monitoring resource"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -258,7 +267,11 @@ impl DynatraceSingleSignOnResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DynatraceSingleSignOnResourceListResult {
     #[doc = "The items on this page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DynatraceSingleSignOnResource>,
     #[doc = "The link to the next page of items"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -324,10 +337,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -438,7 +460,11 @@ impl Serialize for LiftrResourceCategories {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinkableEnvironmentListResponse {
     #[doc = "List of environments for which user is an admin"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkableEnvironmentResponse>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -543,7 +569,12 @@ pub struct LogRules {
     #[serde(rename = "sendActivityLogs", default, skip_serializing_if = "Option::is_none")]
     pub send_activity_logs: Option<SendActivityLogsStatus>,
     #[doc = "List of filtering tags to be used for capturing logs. This only takes effect if SendActivityLogs flag is enabled. If empty, all resources will be captured.\nIf only Exclude action is specified, the rules will apply to the list of all available resources. If Include actions are specified, the rules will only include resources with the associated tags."]
-    #[serde(rename = "filteringTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filteringTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filtering_tags: Vec<FilteringTag>,
 }
 impl LogRules {
@@ -632,7 +663,12 @@ pub type MediumString = String;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricRules {
     #[doc = "List of filtering tags to be used for capturing metrics. If empty, all resources will be captured. If only Exclude action is specified, the rules will apply to the list of all available resources. If Include actions are specified, the rules will only include resources with the associated tags."]
-    #[serde(rename = "filteringTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filteringTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filtering_tags: Vec<FilteringTag>,
 }
 impl MetricRules {
@@ -701,7 +737,11 @@ impl MonitorResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitorResourceListResult {
     #[doc = "The items on this page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitorResource>,
     #[doc = "The link to the next page of items"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -773,7 +813,11 @@ impl MonitoredResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoredResourceListResponse {
     #[doc = "The items on this page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoredResource>,
     #[doc = "The link to the next page of items"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1013,7 +1057,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1156,10 +1204,20 @@ pub struct SsoDetailsResponse {
     #[serde(rename = "singleSignOnUrl", default, skip_serializing_if = "Option::is_none")]
     pub single_sign_on_url: Option<String>,
     #[doc = "array of Aad(azure active directory) domains"]
-    #[serde(rename = "aadDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aadDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aad_domains: Vec<String>,
     #[doc = "Array of admin user emails."]
-    #[serde(rename = "adminUsers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "adminUsers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub admin_users: Vec<String>,
 }
 impl SsoDetailsResponse {
@@ -1492,7 +1550,11 @@ impl TagRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagRuleListResult {
     #[doc = "The items on this page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagRule>,
     #[doc = "The link to the next page of items"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1662,7 +1724,11 @@ impl VmExtensionPayload {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmHostsListResponse {
     #[doc = "The items on this page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VmInfo>,
     #[doc = "The link to the next page of items"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/edgeorder/src/package_2020_12_preview/models.rs b/services/mgmt/edgeorder/src/package_2020_12_preview/models.rs
index d6d12cf2bf..0a494a6ac9 100644
--- a/services/mgmt/edgeorder/src/package_2020_12_preview/models.rs
+++ b/services/mgmt/edgeorder/src/package_2020_12_preview/models.rs
@@ -63,7 +63,11 @@ impl AddressResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AddressResourceList {
     #[doc = "List of address resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AddressResource>,
     #[doc = "Link for the next set of job resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -235,7 +239,12 @@ pub struct BasicInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<Description>,
     #[doc = "Image information for the product system."]
-    #[serde(rename = "imageInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_information: Vec<ImageInformation>,
     #[doc = "Cost information for the product system"]
     #[serde(rename = "costInformation", default, skip_serializing_if = "Option::is_none")]
@@ -332,7 +341,12 @@ pub struct CommonProperties {
     #[serde(flatten)]
     pub basic_information: BasicInformation,
     #[doc = "list of filters supported for a product"]
-    #[serde(rename = "filterableProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filterableProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filterable_properties: Vec<FilterableProperty>,
 }
 impl CommonProperties {
@@ -359,7 +373,12 @@ pub struct ConfigurationFilters {
     #[serde(rename = "hierarchyInformation")]
     pub hierarchy_information: HierarchyInformation,
     #[doc = "Filters specific to product"]
-    #[serde(rename = "filterableProperty", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filterableProperty",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filterable_property: Vec<FilterableProperty>,
 }
 impl ConfigurationFilters {
@@ -376,7 +395,11 @@ pub struct ConfigurationProperties {
     #[serde(flatten)]
     pub common_properties: CommonProperties,
     #[doc = "Specifications of the configuration"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub specifications: Vec<Specification>,
     #[doc = "Dimensions of a configuration."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -391,7 +414,11 @@ impl ConfigurationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Configurations {
     #[doc = "List of configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
     #[doc = "Link for the next set of configurations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -459,7 +486,12 @@ impl ContactDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CostInformation {
     #[doc = "Details on the various billing aspects for the product system."]
-    #[serde(rename = "billingMeterDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "billingMeterDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub billing_meter_details: Vec<BillingMeterDetails>,
     #[doc = "Default url to display billing information"]
     #[serde(rename = "billingInfoUrl", default, skip_serializing_if = "Option::is_none")]
@@ -474,7 +506,12 @@ impl CostInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct CustomerSubscriptionDetails {
     #[doc = "List of registered feature flags for subscription"]
-    #[serde(rename = "registeredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "registeredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub registered_features: Vec<CustomerSubscriptionRegisteredFeatures>,
     #[doc = "Location placement Id of a subscription"]
     #[serde(rename = "locationPlacementId", default, skip_serializing_if = "Option::is_none")]
@@ -520,13 +557,25 @@ pub struct Description {
     #[serde(rename = "longDescription", default, skip_serializing_if = "Option::is_none")]
     pub long_description: Option<String>,
     #[doc = "Keywords for the product system."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keywords: Vec<String>,
     #[doc = "Attributes for the product system."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub attributes: Vec<String>,
     #[doc = "Links for the product system."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<Link>,
 }
 impl Description {
@@ -796,10 +845,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -1340,7 +1398,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1370,7 +1432,12 @@ pub struct OrderItemDetails {
     #[serde(rename = "currentStage", default, skip_serializing_if = "Option::is_none")]
     pub current_stage: Option<StageDetails>,
     #[doc = "Order item status history"]
-    #[serde(rename = "orderItemStageHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orderItemStageHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub order_item_stage_history: Vec<StageDetails>,
     #[doc = "Preferences related to the order"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1382,7 +1449,12 @@ pub struct OrderItemDetails {
     #[serde(rename = "reverseShippingDetails", default, skip_serializing_if = "Option::is_none")]
     pub reverse_shipping_details: Option<ReverseShippingDetails>,
     #[doc = "Additional notification email list"]
-    #[serde(rename = "notificationEmailList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationEmailList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_email_list: Vec<String>,
     #[doc = "Cancellation reason."]
     #[serde(rename = "cancellationReason", default, skip_serializing_if = "Option::is_none")]
@@ -1403,7 +1475,12 @@ pub struct OrderItemDetails {
     #[serde(rename = "managementRpDetails", default, skip_serializing_if = "Option::is_none")]
     pub management_rp_details: Option<ResourceProviderDetails>,
     #[doc = "List of parent RP details supported for configuration."]
-    #[serde(rename = "managementRpDetailsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managementRpDetailsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub management_rp_details_list: Vec<ResourceProviderDetails>,
     #[doc = "The error detail."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1636,7 +1713,11 @@ impl OrderItemResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrderItemResourceList {
     #[doc = "List of order item resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OrderItemResource>,
     #[doc = "Link for the next set of order item resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1678,7 +1759,12 @@ pub struct OrderItemUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub preferences: Option<Preferences>,
     #[doc = "Additional notification email list."]
-    #[serde(rename = "notificationEmailList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationEmailList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_email_list: Vec<String>,
 }
 impl OrderItemUpdateProperties {
@@ -1690,13 +1776,23 @@ impl OrderItemUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrderProperties {
     #[doc = "List of order item ARM Ids which are part of an order."]
-    #[serde(rename = "orderItemIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orderItemIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub order_item_ids: Vec<String>,
     #[doc = "Resource stage details."]
     #[serde(rename = "currentStage", default, skip_serializing_if = "Option::is_none")]
     pub current_stage: Option<StageDetails>,
     #[doc = "Order status history."]
-    #[serde(rename = "orderStageHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orderStageHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub order_stage_history: Vec<StageDetails>,
 }
 impl OrderProperties {
@@ -1728,7 +1824,11 @@ impl OrderResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrderResourceList {
     #[doc = "List of order resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OrderResource>,
     #[doc = "Link for the next set of order resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1766,7 +1866,12 @@ impl Pav2MeterDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Preferences {
     #[doc = "Notification preferences."]
-    #[serde(rename = "notificationPreferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationPreferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_preferences: Vec<NotificationPreference>,
     #[doc = "Preferences related to the shipment logistics of the sku"]
     #[serde(rename = "transportPreferences", default, skip_serializing_if = "Option::is_none")]
@@ -1811,7 +1916,12 @@ pub struct ProductDetails {
     #[serde(rename = "productDoubleEncryptionStatus", default, skip_serializing_if = "Option::is_none")]
     pub product_double_encryption_status: Option<product_details::ProductDoubleEncryptionStatus>,
     #[doc = "list of device details"]
-    #[serde(rename = "deviceDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deviceDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub device_details: Vec<DeviceDetails>,
 }
 impl ProductDetails {
@@ -1869,7 +1979,11 @@ pub mod product_details {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProductFamilies {
     #[doc = "List of product families."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProductFamily>,
     #[doc = "Link for the next set of product families."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1890,7 +2004,11 @@ impl ProductFamilies {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProductFamiliesMetadata {
     #[doc = "List of product family metadata details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProductFamiliesMetadataDetails>,
     #[doc = "Link for the next set of product families."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1955,10 +2073,20 @@ pub struct ProductFamilyProperties {
     #[serde(flatten)]
     pub common_properties: CommonProperties,
     #[doc = "List of product lines supported in the product family"]
-    #[serde(rename = "productLines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "productLines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub product_lines: Vec<ProductLine>,
     #[doc = "Contains details related to resource provider"]
-    #[serde(rename = "resourceProviderDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceProviderDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_provider_details: Vec<ResourceProviderDetails>,
 }
 impl ProductFamilyProperties {
@@ -1984,7 +2112,11 @@ pub struct ProductLineProperties {
     #[serde(flatten)]
     pub common_properties: CommonProperties,
     #[doc = "List of products in the product line"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub products: Vec<Product>,
 }
 impl ProductLineProperties {
@@ -1998,7 +2130,11 @@ pub struct ProductProperties {
     #[serde(flatten)]
     pub common_properties: CommonProperties,
     #[doc = "List of configurations for the product"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configurations: Vec<Configuration>,
 }
 impl ProductProperties {
diff --git a/services/mgmt/edgeorder/src/package_2021_12/models.rs b/services/mgmt/edgeorder/src/package_2021_12/models.rs
index 55d035840a..e80aa75d13 100644
--- a/services/mgmt/edgeorder/src/package_2021_12/models.rs
+++ b/services/mgmt/edgeorder/src/package_2021_12/models.rs
@@ -109,7 +109,11 @@ impl AddressResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AddressResourceList {
     #[doc = "List of address resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AddressResource>,
     #[doc = "Link for the next set of job resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -281,7 +285,12 @@ pub struct BasicInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<Description>,
     #[doc = "Image information for the product system."]
-    #[serde(rename = "imageInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_information: Vec<ImageInformation>,
     #[doc = "Cost information for the product system"]
     #[serde(rename = "costInformation", default, skip_serializing_if = "Option::is_none")]
@@ -378,7 +387,12 @@ pub struct CommonProperties {
     #[serde(flatten)]
     pub basic_information: BasicInformation,
     #[doc = "list of filters supported for a product"]
-    #[serde(rename = "filterableProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filterableProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filterable_properties: Vec<FilterableProperty>,
 }
 impl CommonProperties {
@@ -405,7 +419,12 @@ pub struct ConfigurationFilters {
     #[serde(rename = "hierarchyInformation")]
     pub hierarchy_information: HierarchyInformation,
     #[doc = "Filters specific to product"]
-    #[serde(rename = "filterableProperty", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filterableProperty",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filterable_property: Vec<FilterableProperty>,
 }
 impl ConfigurationFilters {
@@ -422,7 +441,11 @@ pub struct ConfigurationProperties {
     #[serde(flatten)]
     pub common_properties: CommonProperties,
     #[doc = "Specifications of the configuration"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub specifications: Vec<Specification>,
     #[doc = "Dimensions of a configuration."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -437,7 +460,11 @@ impl ConfigurationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Configurations {
     #[doc = "List of configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
     #[doc = "Link for the next set of configurations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -505,7 +532,12 @@ impl ContactDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CostInformation {
     #[doc = "Details on the various billing aspects for the product system."]
-    #[serde(rename = "billingMeterDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "billingMeterDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub billing_meter_details: Vec<BillingMeterDetails>,
     #[doc = "Default url to display billing information"]
     #[serde(rename = "billingInfoUrl", default, skip_serializing_if = "Option::is_none")]
@@ -520,7 +552,12 @@ impl CostInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct CustomerSubscriptionDetails {
     #[doc = "List of registered feature flags for subscription"]
-    #[serde(rename = "registeredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "registeredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub registered_features: Vec<CustomerSubscriptionRegisteredFeatures>,
     #[doc = "Location placement Id of a subscription"]
     #[serde(rename = "locationPlacementId", default, skip_serializing_if = "Option::is_none")]
@@ -566,13 +603,25 @@ pub struct Description {
     #[serde(rename = "longDescription", default, skip_serializing_if = "Option::is_none")]
     pub long_description: Option<String>,
     #[doc = "Keywords for the product system."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keywords: Vec<String>,
     #[doc = "Attributes for the product system."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub attributes: Vec<String>,
     #[doc = "Links for the product system."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<Link>,
 }
 impl Description {
@@ -842,10 +891,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -1386,7 +1444,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1416,7 +1478,12 @@ pub struct OrderItemDetails {
     #[serde(rename = "currentStage", default, skip_serializing_if = "Option::is_none")]
     pub current_stage: Option<StageDetails>,
     #[doc = "Order item status history"]
-    #[serde(rename = "orderItemStageHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orderItemStageHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub order_item_stage_history: Vec<StageDetails>,
     #[doc = "Preferences related to the order"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1428,7 +1495,12 @@ pub struct OrderItemDetails {
     #[serde(rename = "reverseShippingDetails", default, skip_serializing_if = "Option::is_none")]
     pub reverse_shipping_details: Option<ReverseShippingDetails>,
     #[doc = "Additional notification email list"]
-    #[serde(rename = "notificationEmailList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationEmailList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_email_list: Vec<String>,
     #[doc = "Cancellation reason."]
     #[serde(rename = "cancellationReason", default, skip_serializing_if = "Option::is_none")]
@@ -1449,7 +1521,12 @@ pub struct OrderItemDetails {
     #[serde(rename = "managementRpDetails", default, skip_serializing_if = "Option::is_none")]
     pub management_rp_details: Option<ResourceProviderDetails>,
     #[doc = "List of parent RP details supported for configuration."]
-    #[serde(rename = "managementRpDetailsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managementRpDetailsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub management_rp_details_list: Vec<ResourceProviderDetails>,
     #[doc = "The error detail."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1682,7 +1759,11 @@ impl OrderItemResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrderItemResourceList {
     #[doc = "List of order item resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OrderItemResource>,
     #[doc = "Link for the next set of order item resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1724,7 +1805,12 @@ pub struct OrderItemUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub preferences: Option<Preferences>,
     #[doc = "Additional notification email list."]
-    #[serde(rename = "notificationEmailList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationEmailList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_email_list: Vec<String>,
 }
 impl OrderItemUpdateProperties {
@@ -1736,13 +1822,23 @@ impl OrderItemUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrderProperties {
     #[doc = "List of order item ARM Ids which are part of an order."]
-    #[serde(rename = "orderItemIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orderItemIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub order_item_ids: Vec<String>,
     #[doc = "Resource stage details."]
     #[serde(rename = "currentStage", default, skip_serializing_if = "Option::is_none")]
     pub current_stage: Option<StageDetails>,
     #[doc = "Order status history."]
-    #[serde(rename = "orderStageHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orderStageHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub order_stage_history: Vec<StageDetails>,
 }
 impl OrderProperties {
@@ -1774,7 +1870,11 @@ impl OrderResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrderResourceList {
     #[doc = "List of order resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OrderResource>,
     #[doc = "Link for the next set of order resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1812,7 +1912,12 @@ impl Pav2MeterDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Preferences {
     #[doc = "Notification preferences."]
-    #[serde(rename = "notificationPreferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationPreferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_preferences: Vec<NotificationPreference>,
     #[doc = "Preferences related to the shipment logistics of the sku"]
     #[serde(rename = "transportPreferences", default, skip_serializing_if = "Option::is_none")]
@@ -1857,7 +1962,12 @@ pub struct ProductDetails {
     #[serde(rename = "productDoubleEncryptionStatus", default, skip_serializing_if = "Option::is_none")]
     pub product_double_encryption_status: Option<product_details::ProductDoubleEncryptionStatus>,
     #[doc = "list of device details"]
-    #[serde(rename = "deviceDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deviceDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub device_details: Vec<DeviceDetails>,
 }
 impl ProductDetails {
@@ -1915,7 +2025,11 @@ pub mod product_details {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProductFamilies {
     #[doc = "List of product families."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProductFamily>,
     #[doc = "Link for the next set of product families."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1936,7 +2050,11 @@ impl ProductFamilies {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProductFamiliesMetadata {
     #[doc = "List of product family metadata details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProductFamiliesMetadataDetails>,
     #[doc = "Link for the next set of product families."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2001,10 +2119,20 @@ pub struct ProductFamilyProperties {
     #[serde(flatten)]
     pub common_properties: CommonProperties,
     #[doc = "List of product lines supported in the product family"]
-    #[serde(rename = "productLines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "productLines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub product_lines: Vec<ProductLine>,
     #[doc = "Contains details related to resource provider"]
-    #[serde(rename = "resourceProviderDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceProviderDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_provider_details: Vec<ResourceProviderDetails>,
 }
 impl ProductFamilyProperties {
@@ -2030,7 +2158,11 @@ pub struct ProductLineProperties {
     #[serde(flatten)]
     pub common_properties: CommonProperties,
     #[doc = "List of products in the product line"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub products: Vec<Product>,
 }
 impl ProductLineProperties {
@@ -2044,7 +2176,11 @@ pub struct ProductProperties {
     #[serde(flatten)]
     pub common_properties: CommonProperties,
     #[doc = "List of configurations for the product"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configurations: Vec<Configuration>,
 }
 impl ProductProperties {
diff --git a/services/mgmt/edgeorder/src/package_2022_05_preview/models.rs b/services/mgmt/edgeorder/src/package_2022_05_preview/models.rs
index e66e53d171..6140db6ff8 100644
--- a/services/mgmt/edgeorder/src/package_2022_05_preview/models.rs
+++ b/services/mgmt/edgeorder/src/package_2022_05_preview/models.rs
@@ -126,7 +126,11 @@ impl AddressResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AddressResourceList {
     #[doc = "List of address resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AddressResource>,
     #[doc = "Link for the next set of job resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -300,7 +304,12 @@ pub struct BasicInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<Description>,
     #[doc = "Image information for the product system."]
-    #[serde(rename = "imageInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_information: Vec<ImageInformation>,
     #[doc = "Cost information for the product system."]
     #[serde(rename = "costInformation", default, skip_serializing_if = "Option::is_none")]
@@ -447,7 +456,11 @@ pub struct CategoryInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Links for the category."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<Link>,
 }
 impl CategoryInformation {
@@ -471,10 +484,20 @@ impl ChildConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChildConfigurationFilter {
     #[doc = "The list of child configuration hierarchy customer wants to filter for the given configuration."]
-    #[serde(rename = "hierarchyInformations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hierarchyInformations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hierarchy_informations: Vec<HierarchyInformation>,
     #[doc = "Filter to fetch all child configurations belonging to the given list of configuration types."]
-    #[serde(rename = "childConfigurationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childConfigurationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_configuration_types: Vec<String>,
 }
 impl ChildConfigurationFilter {
@@ -498,19 +521,38 @@ pub struct ChildConfigurationProperties {
     #[serde(rename = "maximumQuantity", default, skip_serializing_if = "Option::is_none")]
     pub maximum_quantity: Option<i32>,
     #[doc = "Specifications of the configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub specifications: Vec<Specification>,
     #[doc = "Dimensions of a configuration."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub dimensions: Option<Dimensions>,
     #[doc = "Different types of child configurations which exist for this configuration, these can be used to populate the child configuration filter."]
-    #[serde(rename = "childConfigurationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childConfigurationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_configuration_types: Vec<String>,
     #[doc = "Child configurations present for the configuration after applying child configuration filter, grouped by the category name of the child configuration."]
-    #[serde(rename = "groupedChildConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupedChildConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub grouped_child_configurations: Vec<GroupedChildConfigurations>,
     #[doc = "List of filters supported for a product."]
-    #[serde(rename = "filterableProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filterableProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filterable_properties: Vec<FilterableProperty>,
     #[doc = "Display Name for the product system."]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
@@ -519,7 +561,12 @@ pub struct ChildConfigurationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<Description>,
     #[doc = "Image information for the product system."]
-    #[serde(rename = "imageInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "imageInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub image_information: Vec<ImageInformation>,
     #[doc = "Cost information for the product system."]
     #[serde(rename = "costInformation", default, skip_serializing_if = "Option::is_none")]
@@ -624,7 +671,12 @@ pub struct CommonProperties {
     #[serde(flatten)]
     pub basic_information: BasicInformation,
     #[doc = "List of filters supported for a product."]
-    #[serde(rename = "filterableProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filterableProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filterable_properties: Vec<FilterableProperty>,
 }
 impl CommonProperties {
@@ -660,7 +712,12 @@ pub struct ConfigurationDeviceDetails {
     #[serde(rename = "identificationType", default, skip_serializing_if = "Option::is_none")]
     pub identification_type: Option<configuration_device_details::IdentificationType>,
     #[doc = "List of device details."]
-    #[serde(rename = "deviceDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deviceDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub device_details: Vec<DeviceDetails>,
 }
 impl ConfigurationDeviceDetails {
@@ -715,7 +772,12 @@ pub struct ConfigurationFilter {
     #[serde(rename = "hierarchyInformation")]
     pub hierarchy_information: HierarchyInformation,
     #[doc = "Filters specific to product."]
-    #[serde(rename = "filterableProperty", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filterableProperty",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filterable_property: Vec<FilterableProperty>,
     #[doc = "Child configuration filter."]
     #[serde(rename = "childConfigurationFilter", default, skip_serializing_if = "Option::is_none")]
@@ -736,16 +798,30 @@ pub struct ConfigurationProperties {
     #[serde(flatten)]
     pub common_properties: CommonProperties,
     #[doc = "Specifications of the configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub specifications: Vec<Specification>,
     #[doc = "Dimensions of a configuration."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub dimensions: Option<Dimensions>,
     #[doc = "Different types of child configurations which exist for this configuration, these can be used to populate the child configuration filter."]
-    #[serde(rename = "childConfigurationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childConfigurationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_configuration_types: Vec<String>,
     #[doc = "Child configurations present for the configuration after applying child configuration filter, grouped by the category name of the child configuration."]
-    #[serde(rename = "groupedChildConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupedChildConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub grouped_child_configurations: Vec<GroupedChildConfigurations>,
 }
 impl ConfigurationProperties {
@@ -757,7 +833,11 @@ impl ConfigurationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Configurations {
     #[doc = "List of configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
     #[doc = "Link for the next set of configurations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -822,7 +902,12 @@ impl ContactDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CostInformation {
     #[doc = "Details on the various billing aspects for the product system."]
-    #[serde(rename = "billingMeterDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "billingMeterDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub billing_meter_details: Vec<BillingMeterDetails>,
     #[doc = "Default url to display billing information."]
     #[serde(rename = "billingInfoUrl", default, skip_serializing_if = "Option::is_none")]
@@ -837,7 +922,12 @@ impl CostInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct CustomerSubscriptionDetails {
     #[doc = "List of registered feature flags for subscription."]
-    #[serde(rename = "registeredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "registeredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub registered_features: Vec<CustomerSubscriptionRegisteredFeatures>,
     #[doc = "Location placement Id of a subscription."]
     #[serde(rename = "locationPlacementId", default, skip_serializing_if = "Option::is_none")]
@@ -883,13 +973,25 @@ pub struct Description {
     #[serde(rename = "longDescription", default, skip_serializing_if = "Option::is_none")]
     pub long_description: Option<String>,
     #[doc = "Keywords for the product system."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keywords: Vec<String>,
     #[doc = "Attributes for the product system."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub attributes: Vec<String>,
     #[doc = "Links for the product system."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<Link>,
 }
 impl Description {
@@ -1159,10 +1261,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -1271,7 +1382,12 @@ pub struct GroupedChildConfigurations {
     #[serde(rename = "categoryInformation", default, skip_serializing_if = "Option::is_none")]
     pub category_information: Option<CategoryInformation>,
     #[doc = "List of child configurations."]
-    #[serde(rename = "childConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_configurations: Vec<ChildConfiguration>,
 }
 impl GroupedChildConfigurations {
@@ -1720,7 +1836,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1753,7 +1873,12 @@ pub struct OrderItemDetails {
     #[serde(rename = "currentStage", default, skip_serializing_if = "Option::is_none")]
     pub current_stage: Option<StageDetails>,
     #[doc = "Order item status history."]
-    #[serde(rename = "orderItemStageHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orderItemStageHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub order_item_stage_history: Vec<StageDetails>,
     #[doc = "Preferences related to the order."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1765,7 +1890,12 @@ pub struct OrderItemDetails {
     #[serde(rename = "reverseShippingDetails", default, skip_serializing_if = "Option::is_none")]
     pub reverse_shipping_details: Option<ReverseShippingDetails>,
     #[doc = "Additional notification email list."]
-    #[serde(rename = "notificationEmailList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationEmailList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_email_list: Vec<String>,
     #[doc = "Cancellation reason."]
     #[serde(rename = "cancellationReason", default, skip_serializing_if = "Option::is_none")]
@@ -1783,7 +1913,12 @@ pub struct OrderItemDetails {
     #[serde(rename = "returnStatus", default, skip_serializing_if = "Option::is_none")]
     pub return_status: Option<order_item_details::ReturnStatus>,
     #[doc = "List of parent RP details supported for configuration."]
-    #[serde(rename = "managementRpDetailsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managementRpDetailsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub management_rp_details_list: Vec<ResourceProviderDetails>,
     #[doc = "The error detail."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2053,7 +2188,11 @@ impl OrderItemResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrderItemResourceList {
     #[doc = "List of order item resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OrderItemResource>,
     #[doc = "Link for the next set of order item resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2095,7 +2234,12 @@ pub struct OrderItemUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub preferences: Option<Preferences>,
     #[doc = "Additional notification email list."]
-    #[serde(rename = "notificationEmailList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationEmailList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_email_list: Vec<String>,
 }
 impl OrderItemUpdateProperties {
@@ -2107,13 +2251,23 @@ impl OrderItemUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrderProperties {
     #[doc = "List of order item ARM Ids which are part of an order."]
-    #[serde(rename = "orderItemIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orderItemIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub order_item_ids: Vec<String>,
     #[doc = "Resource stage details."]
     #[serde(rename = "currentStage", default, skip_serializing_if = "Option::is_none")]
     pub current_stage: Option<StageDetails>,
     #[doc = "Order status history."]
-    #[serde(rename = "orderStageHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orderStageHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub order_stage_history: Vec<StageDetails>,
     #[doc = "Order mode."]
     #[serde(rename = "orderMode", default, skip_serializing_if = "Option::is_none")]
@@ -2188,7 +2342,11 @@ impl OrderResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrderResourceList {
     #[doc = "List of order resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OrderResource>,
     #[doc = "Link for the next set of order resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2226,7 +2384,12 @@ impl Pav2MeterDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Preferences {
     #[doc = "Notification preferences."]
-    #[serde(rename = "notificationPreferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationPreferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_preferences: Vec<NotificationPreference>,
     #[doc = "Preferences related to the shipment logistics of the sku."]
     #[serde(rename = "transportPreferences", default, skip_serializing_if = "Option::is_none")]
@@ -2274,10 +2437,20 @@ pub struct ProductDetails {
     #[serde(rename = "parentDeviceDetails", default, skip_serializing_if = "Option::is_none")]
     pub parent_device_details: Option<DeviceDetails>,
     #[doc = "List of additional configurations customer wants in the order item apart from the ones included in the base configuration."]
-    #[serde(rename = "optInAdditionalConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "optInAdditionalConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub opt_in_additional_configurations: Vec<AdditionalConfiguration>,
     #[doc = "Details of all child configurations that are part of the order item."]
-    #[serde(rename = "childConfigurationDeviceDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childConfigurationDeviceDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_configuration_device_details: Vec<ConfigurationDeviceDetails>,
 }
 impl ProductDetails {
@@ -2374,7 +2547,11 @@ pub mod product_details {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProductFamilies {
     #[doc = "List of product families."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProductFamily>,
     #[doc = "Link for the next set of product families."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2395,7 +2572,11 @@ impl ProductFamilies {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProductFamiliesMetadata {
     #[doc = "List of product family metadata details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProductFamiliesMetadataDetails>,
     #[doc = "Link for the next set of product families."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2460,10 +2641,20 @@ pub struct ProductFamilyProperties {
     #[serde(flatten)]
     pub common_properties: CommonProperties,
     #[doc = "List of product lines supported in the product family."]
-    #[serde(rename = "productLines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "productLines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub product_lines: Vec<ProductLine>,
     #[doc = "Contains details related to resource provider."]
-    #[serde(rename = "resourceProviderDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceProviderDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_provider_details: Vec<ResourceProviderDetails>,
 }
 impl ProductFamilyProperties {
@@ -2489,7 +2680,11 @@ pub struct ProductLineProperties {
     #[serde(flatten)]
     pub common_properties: CommonProperties,
     #[doc = "List of products in the product line."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub products: Vec<Product>,
 }
 impl ProductLineProperties {
@@ -2503,7 +2698,11 @@ pub struct ProductProperties {
     #[serde(flatten)]
     pub common_properties: CommonProperties,
     #[doc = "List of configurations for the product."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configurations: Vec<Configuration>,
 }
 impl ProductProperties {
@@ -2569,7 +2768,11 @@ impl Resource {
 pub struct ResourceMoveRequest {
     #[serde(rename = "targetResourceGroup", default, skip_serializing_if = "Option::is_none")]
     pub target_resource_group: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
 }
 impl ResourceMoveRequest {
diff --git a/services/mgmt/edgeorderpartner/src/package_2020_12_preview/models.rs b/services/mgmt/edgeorderpartner/src/package_2020_12_preview/models.rs
index 08bfd8bbfd..0b44e3f42b 100644
--- a/services/mgmt/edgeorderpartner/src/package_2020_12_preview/models.rs
+++ b/services/mgmt/edgeorderpartner/src/package_2020_12_preview/models.rs
@@ -65,9 +65,18 @@ pub struct CloudError {
     pub message: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudError>,
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<AdditionalErrorInfo>,
 }
 impl CloudError {
@@ -103,7 +112,11 @@ impl ConfigurationData {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationDetails {
     #[doc = "Collection of specification details about the inventory"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub specifications: Vec<SpecificationDetails>,
 }
 impl ConfigurationDetails {
@@ -151,10 +164,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -448,7 +470,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -505,7 +531,11 @@ impl PartnerInventory {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartnerInventoryList {
     #[doc = "List of partner inventories"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartnerInventory>,
     #[doc = "Link for the next set of partner inventories."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/education/src/package_2021_12_01_preview/models.rs b/services/mgmt/education/src/package_2021_12_01_preview/models.rs
index ff9b276aa3..4131ab5d6a 100644
--- a/services/mgmt/education/src/package_2021_12_01_preview/models.rs
+++ b/services/mgmt/education/src/package_2021_12_01_preview/models.rs
@@ -173,7 +173,11 @@ impl GrantDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GrantListResponse {
     #[doc = "The list of labs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GrantDetails>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -220,7 +224,11 @@ impl JoinRequestDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JoinRequestList {
     #[doc = "The list of requests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JoinRequestDetails>,
     #[doc = "the link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -316,7 +324,11 @@ impl LabDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LabListResult {
     #[doc = "The list of labs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LabDetails>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -553,7 +565,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -639,7 +655,11 @@ impl StudentLabDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StudentLabListResult {
     #[doc = "The list of labs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StudentLabDetails>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -779,7 +799,11 @@ pub mod student_lab_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StudentListResult {
     #[doc = "The list of students."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StudentDetails>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/elastic/src/package_2020_07_01/models.rs b/services/mgmt/elastic/src/package_2020_07_01/models.rs
index 049b3ed365..3e8abffaf8 100644
--- a/services/mgmt/elastic/src/package_2020_07_01/models.rs
+++ b/services/mgmt/elastic/src/package_2020_07_01/models.rs
@@ -182,7 +182,11 @@ impl ElasticMonitorResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ElasticMonitorResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ElasticMonitorResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -239,7 +243,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -332,7 +340,12 @@ pub struct LogRules {
     #[serde(rename = "sendActivityLogs", default, skip_serializing_if = "Option::is_none")]
     pub send_activity_logs: Option<bool>,
     #[doc = "List of filtering tags to be used for capturing logs. This only takes effect if SendActivityLogs flag is enabled. If empty, all resources will be captured. If only Exclude action is specified, the rules will apply to the list of all available resources. If Include actions are specified, the rules will only include resources with the associated tags."]
-    #[serde(rename = "filteringTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filteringTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filtering_tags: Vec<FilteringTag>,
 }
 impl LogRules {
@@ -423,7 +436,11 @@ impl MonitoredResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoredResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoredResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -505,7 +522,11 @@ impl MonitoringTagRules {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoringTagRulesListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoringTagRules>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -562,7 +583,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Elastic provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -834,7 +859,11 @@ impl VmCollectionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmHostListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VmResources>,
     #[doc = "Link to the next Vm resource Id, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/elastic/src/package_2020_07_01_preview/models.rs b/services/mgmt/elastic/src/package_2020_07_01_preview/models.rs
index 049b3ed365..3e8abffaf8 100644
--- a/services/mgmt/elastic/src/package_2020_07_01_preview/models.rs
+++ b/services/mgmt/elastic/src/package_2020_07_01_preview/models.rs
@@ -182,7 +182,11 @@ impl ElasticMonitorResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ElasticMonitorResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ElasticMonitorResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -239,7 +243,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -332,7 +340,12 @@ pub struct LogRules {
     #[serde(rename = "sendActivityLogs", default, skip_serializing_if = "Option::is_none")]
     pub send_activity_logs: Option<bool>,
     #[doc = "List of filtering tags to be used for capturing logs. This only takes effect if SendActivityLogs flag is enabled. If empty, all resources will be captured. If only Exclude action is specified, the rules will apply to the list of all available resources. If Include actions are specified, the rules will only include resources with the associated tags."]
-    #[serde(rename = "filteringTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filteringTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filtering_tags: Vec<FilteringTag>,
 }
 impl LogRules {
@@ -423,7 +436,11 @@ impl MonitoredResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoredResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoredResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -505,7 +522,11 @@ impl MonitoringTagRules {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoringTagRulesListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoringTagRules>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -562,7 +583,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Elastic provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -834,7 +859,11 @@ impl VmCollectionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmHostListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VmResources>,
     #[doc = "Link to the next Vm resource Id, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/elastic/src/package_2021_09_01_preview/models.rs b/services/mgmt/elastic/src/package_2021_09_01_preview/models.rs
index 680507fc99..9e8cedd062 100644
--- a/services/mgmt/elastic/src/package_2021_09_01_preview/models.rs
+++ b/services/mgmt/elastic/src/package_2021_09_01_preview/models.rs
@@ -182,7 +182,11 @@ impl ElasticMonitorResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ElasticMonitorResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ElasticMonitorResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -239,7 +243,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -275,7 +283,11 @@ pub struct ExternalUserInfo {
     #[serde(rename = "emailId", default, skip_serializing_if = "Option::is_none")]
     pub email_id: Option<String>,
     #[doc = "Roles to be assigned for  created or updated user"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
 }
 impl ExternalUserInfo {
@@ -368,7 +380,12 @@ pub struct LogRules {
     #[serde(rename = "sendActivityLogs", default, skip_serializing_if = "Option::is_none")]
     pub send_activity_logs: Option<bool>,
     #[doc = "List of filtering tags to be used for capturing logs. This only takes effect if SendActivityLogs flag is enabled. If empty, all resources will be captured. If only Exclude action is specified, the rules will apply to the list of all available resources. If Include actions are specified, the rules will only include resources with the associated tags."]
-    #[serde(rename = "filteringTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filteringTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filtering_tags: Vec<FilteringTag>,
 }
 impl LogRules {
@@ -459,7 +476,11 @@ impl MonitoredResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoredResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoredResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -541,7 +562,11 @@ impl MonitoringTagRules {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoringTagRulesListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoringTagRules>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -598,7 +623,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Elastic provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -870,7 +899,11 @@ impl VmCollectionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmHostListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VmResources>,
     #[doc = "Link to the next Vm resource Id, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/elastic/src/package_2021_10_01_preview/models.rs b/services/mgmt/elastic/src/package_2021_10_01_preview/models.rs
index 0649ea6d88..c6625c706d 100644
--- a/services/mgmt/elastic/src/package_2021_10_01_preview/models.rs
+++ b/services/mgmt/elastic/src/package_2021_10_01_preview/models.rs
@@ -182,7 +182,11 @@ impl ElasticMonitorResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ElasticMonitorResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ElasticMonitorResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -251,7 +255,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -287,7 +295,11 @@ pub struct ExternalUserInfo {
     #[serde(rename = "emailId", default, skip_serializing_if = "Option::is_none")]
     pub email_id: Option<String>,
     #[doc = "Roles to be assigned for  created or updated user"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
 }
 impl ExternalUserInfo {
@@ -380,7 +392,12 @@ pub struct LogRules {
     #[serde(rename = "sendActivityLogs", default, skip_serializing_if = "Option::is_none")]
     pub send_activity_logs: Option<bool>,
     #[doc = "List of filtering tags to be used for capturing logs. This only takes effect if SendActivityLogs flag is enabled. If empty, all resources will be captured. If only Exclude action is specified, the rules will apply to the list of all available resources. If Include actions are specified, the rules will only include resources with the associated tags."]
-    #[serde(rename = "filteringTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filteringTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filtering_tags: Vec<FilteringTag>,
 }
 impl LogRules {
@@ -474,7 +491,11 @@ impl MonitoredResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoredResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoredResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -556,7 +577,11 @@ impl MonitoringTagRules {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoringTagRulesListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoringTagRules>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -613,7 +638,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Elastic provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -849,7 +878,12 @@ pub struct UpgradableVersionsList {
     #[serde(rename = "currentVersion", default, skip_serializing_if = "Option::is_none")]
     pub current_version: Option<String>,
     #[doc = "Stack Versions that this version can upgrade to"]
-    #[serde(rename = "upgradableVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "upgradableVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upgradable_versions: Vec<String>,
 }
 impl UpgradableVersionsList {
@@ -900,7 +934,11 @@ impl VmCollectionUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmHostListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VmResources>,
     #[doc = "Link to the next Vm resource Id, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/elasticsan/src/package_2021_11_20_preview/models.rs b/services/mgmt/elasticsan/src/package_2021_11_20_preview/models.rs
index ddb3175844..ac7f83f717 100644
--- a/services/mgmt/elasticsan/src/package_2021_11_20_preview/models.rs
+++ b/services/mgmt/elasticsan/src/package_2021_11_20_preview/models.rs
@@ -92,7 +92,12 @@ pub struct ElasticSanProperties {
     #[doc = "The SKU name. Required for account creation; optional for update."]
     pub sku: Sku,
     #[doc = "Logical zone for Elastic San resource; example: [\"1\"]."]
-    #[serde(rename = "availabilityZones", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilityZones",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_zones: Vec<AvailabilityZone>,
     #[doc = "Provisioning state of the iSCSI Target."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -269,10 +274,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -308,7 +322,12 @@ impl IscsiTargetInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkRuleSet {
     #[doc = "The list of virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
 }
 impl NetworkRuleSet {
@@ -477,13 +496,26 @@ pub struct SkuInformation {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "The set of locations that the SKU is available. This will be supported and registered Azure Geo Regions (e.g. West US, East US, Southeast Asia, etc.)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Availability of the SKU for the location/zone"]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfo>,
     #[doc = "The capability information in the specified SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl SkuInformation {
@@ -502,7 +534,11 @@ impl SkuInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuInformationList {
     #[doc = "List of ResourceType Sku"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuInformation>,
 }
 impl azure_core::Continuable for SkuInformationList {
@@ -523,7 +559,11 @@ pub struct SkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "The zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl SkuLocationInfo {
diff --git a/services/mgmt/engagementfabric/src/package_2018_09_preview/models.rs b/services/mgmt/engagementfabric/src/package_2018_09_preview/models.rs
index b42afdd953..d7d7fc1cb3 100644
--- a/services/mgmt/engagementfabric/src/package_2018_09_preview/models.rs
+++ b/services/mgmt/engagementfabric/src/package_2018_09_preview/models.rs
@@ -18,7 +18,11 @@ impl Account {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountList {
     #[doc = "EngagementFabric accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
 }
 impl azure_core::Continuable for AccountList {
@@ -62,7 +66,11 @@ impl Channel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChannelList {
     #[doc = "EngagementFabric channels"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Channel>,
 }
 impl azure_core::Continuable for ChannelList {
@@ -83,7 +91,12 @@ pub struct ChannelProperties {
     #[serde(rename = "channelType")]
     pub channel_type: String,
     #[doc = "The functions to be enabled for the channel"]
-    #[serde(rename = "channelFunctions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "channelFunctions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub channel_functions: Vec<String>,
     #[doc = "The channel credentials"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -108,7 +121,12 @@ pub struct ChannelTypeDescription {
     #[serde(rename = "channelDescription", default, skip_serializing_if = "Option::is_none")]
     pub channel_description: Option<String>,
     #[doc = "All the available functions for the channel"]
-    #[serde(rename = "channelFunctions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "channelFunctions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub channel_functions: Vec<String>,
 }
 impl ChannelTypeDescription {
@@ -120,7 +138,11 @@ impl ChannelTypeDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChannelTypeDescriptionList {
     #[doc = "Channel descriptions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ChannelTypeDescription>,
 }
 impl ChannelTypeDescriptionList {
@@ -228,7 +250,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The list of additional details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -258,7 +284,11 @@ impl KeyDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyDescriptionList {
     #[doc = "Account keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KeyDescription>,
 }
 impl azure_core::Continuable for KeyDescriptionList {
@@ -349,7 +379,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "The EngagementFabric operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationList {
@@ -432,13 +466,26 @@ pub struct SkuDescription {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tier: Option<String>,
     #[doc = "The set of locations that the SKU is available"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Locations and zones"]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfoItem>,
     #[doc = "The restrictions because of which SKU cannot be used"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<serde_json::Value>,
 }
 impl SkuDescription {
@@ -450,7 +497,11 @@ impl SkuDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuDescriptionList {
     #[doc = "SKU descriptions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuDescription>,
 }
 impl azure_core::Continuable for SkuDescriptionList {
@@ -471,7 +522,11 @@ pub struct SkuLocationInfoItem {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "The available zone of the SKU"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl SkuLocationInfoItem {
diff --git a/services/mgmt/enterpriseknowledgegraph/src/package_2018_12_03/models.rs b/services/mgmt/enterpriseknowledgegraph/src/package_2018_12_03/models.rs
index b110231902..af1bf27dd0 100644
--- a/services/mgmt/enterpriseknowledgegraph/src/package_2018_12_03/models.rs
+++ b/services/mgmt/enterpriseknowledgegraph/src/package_2018_12_03/models.rs
@@ -53,7 +53,11 @@ pub struct EnterpriseKnowledgeGraphResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of EnterpriseKnowledgeGraph service results and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnterpriseKnowledgeGraph>,
 }
 impl azure_core::Continuable for EnterpriseKnowledgeGraphResponseList {
@@ -147,7 +151,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
diff --git a/services/mgmt/eventgrid/src/package_2021_10_preview/models.rs b/services/mgmt/eventgrid/src/package_2021_10_preview/models.rs
index dd8f838d03..e6731658db 100644
--- a/services/mgmt/eventgrid/src/package_2021_10_preview/models.rs
+++ b/services/mgmt/eventgrid/src/package_2021_10_preview/models.rs
@@ -158,7 +158,12 @@ pub struct AzureFunctionEventSubscriptionDestinationProperties {
     #[serde(rename = "preferredBatchSizeInKilobytes", default, skip_serializing_if = "Option::is_none")]
     pub preferred_batch_size_in_kilobytes: Option<i32>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl AzureFunctionEventSubscriptionDestinationProperties {
@@ -386,7 +391,11 @@ impl ChannelUpdateParametersProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChannelsListResult {
     #[doc = "A collection of Channels."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Channel>,
     #[doc = "A link for the next page of channels."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -534,7 +543,11 @@ impl DeadLetterWithResourceIdentity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeliveryAttributeListResult {
     #[doc = "A collection of DeliveryAttributeMapping"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeliveryAttributeMapping>,
 }
 impl DeliveryAttributeListResult {
@@ -645,7 +658,12 @@ impl Domain {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainProperties {
     #[doc = "List of private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Provisioning state of the Event Grid Domain Resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -666,7 +684,12 @@ pub struct DomainProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<domain_properties::PublicNetworkAccess>,
     #[doc = "This can be used to restrict traffic from specific IPs instead of all IPs. Note: These are considered only if PublicNetworkAccess is enabled."]
-    #[serde(rename = "inboundIpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundIpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_ip_rules: Vec<InboundIpRule>,
     #[doc = "This boolean is used to enable or disable local auth. Default value is false. When the property is set to true, only AAD token will be used to authenticate if user is allowed to publish to the domain."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -966,7 +989,11 @@ pub mod domain_topic_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainTopicsListResult {
     #[doc = "A collection of Domain Topics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DomainTopic>,
     #[doc = "A link for the next page of domain topics."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -990,7 +1017,12 @@ pub struct DomainUpdateParameterProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<domain_update_parameter_properties::PublicNetworkAccess>,
     #[doc = "This can be used to restrict traffic from specific IPs instead of all IPs. Note: These are considered only if PublicNetworkAccess is enabled."]
-    #[serde(rename = "inboundIpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundIpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_ip_rules: Vec<InboundIpRule>,
     #[doc = "This boolean is used to enable or disable local auth. Default value is false. When the property is set to true, only AAD token will be used to authenticate if user is allowed to publish to the domain."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -1117,7 +1149,11 @@ impl DomainUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainsListResult {
     #[doc = "A collection of Domains"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Domain>,
     #[doc = "A link for the next page of domains"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1205,7 +1241,12 @@ pub struct EventChannelFilter {
     #[serde(rename = "enableAdvancedFilteringOnArrays", default, skip_serializing_if = "Option::is_none")]
     pub enable_advanced_filtering_on_arrays: Option<bool>,
     #[doc = "An array of advanced filters that are used for filtering event channels."]
-    #[serde(rename = "advancedFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "advancedFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub advanced_filters: Vec<AdvancedFilter>,
 }
 impl EventChannelFilter {
@@ -1350,7 +1391,11 @@ impl EventChannelSource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventChannelsListResult {
     #[doc = "A collection of Event Channels"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventChannel>,
     #[doc = "A link for the next page of event channels"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1391,7 +1436,12 @@ pub struct EventHubEventSubscriptionDestinationProperties {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl EventHubEventSubscriptionDestinationProperties {
@@ -1490,7 +1540,12 @@ pub struct EventSubscriptionFilter {
     #[serde(rename = "subjectEndsWith", default, skip_serializing_if = "Option::is_none")]
     pub subject_ends_with: Option<String>,
     #[doc = "A list of applicable event types that need to be part of the event subscription. If it is desired to subscribe to all default event types, set the IncludedEventTypes to null."]
-    #[serde(rename = "includedEventTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedEventTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_event_types: Vec<String>,
     #[doc = "Specifies if the SubjectBeginsWith and SubjectEndsWith properties of the filter\r\nshould be compared in a case sensitive manner."]
     #[serde(rename = "isSubjectCaseSensitive", default, skip_serializing_if = "Option::is_none")]
@@ -1499,7 +1554,12 @@ pub struct EventSubscriptionFilter {
     #[serde(rename = "enableAdvancedFilteringOnArrays", default, skip_serializing_if = "Option::is_none")]
     pub enable_advanced_filtering_on_arrays: Option<bool>,
     #[doc = "An array of advanced filters that are used for filtering event subscriptions."]
-    #[serde(rename = "advancedFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "advancedFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub advanced_filters: Vec<AdvancedFilter>,
 }
 impl EventSubscriptionFilter {
@@ -1593,7 +1653,11 @@ pub struct EventSubscriptionProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub filter: Option<EventSubscriptionFilter>,
     #[doc = "List of user defined labels."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "Expiration time of the event subscription."]
     #[serde(rename = "expirationTimeUtc", default, with = "azure_core::date::rfc3339::option")]
@@ -1724,7 +1788,11 @@ pub struct EventSubscriptionUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub filter: Option<EventSubscriptionFilter>,
     #[doc = "List of user defined labels."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "Information about the expiration time for the event subscription."]
     #[serde(rename = "expirationTimeUtc", default, with = "azure_core::date::rfc3339::option")]
@@ -1794,7 +1862,11 @@ pub mod event_subscription_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventSubscriptionsListResult {
     #[doc = "A collection of EventSubscriptions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventSubscription>,
     #[doc = "A link for the next page of event subscriptions"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1903,7 +1975,11 @@ impl EventTypeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventTypesListResult {
     #[doc = "A collection of event types"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventType>,
 }
 impl azure_core::Continuable for EventTypesListResult {
@@ -1988,7 +2064,12 @@ pub struct HybridConnectionEventSubscriptionDestinationProperties {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl HybridConnectionEventSubscriptionDestinationProperties {
@@ -2315,7 +2396,11 @@ pub struct NumberInAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<f64>,
 }
 impl NumberInAdvancedFilter {
@@ -2332,7 +2417,11 @@ pub struct NumberInRangeAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<Vec<f64>>,
 }
 impl NumberInRangeAdvancedFilter {
@@ -2383,7 +2472,11 @@ pub struct NumberNotInAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<f64>,
 }
 impl NumberNotInAdvancedFilter {
@@ -2400,7 +2493,11 @@ pub struct NumberNotInRangeAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<Vec<f64>>,
 }
 impl NumberNotInRangeAdvancedFilter {
@@ -2460,7 +2557,11 @@ impl OperationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "A collection of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationsListResult {
@@ -2499,7 +2600,12 @@ pub struct PartnerAuthorization {
     #[serde(rename = "defaultMaximumExpirationTimeInDays", default, skip_serializing_if = "Option::is_none")]
     pub default_maximum_expiration_time_in_days: Option<i32>,
     #[doc = "The list of authorized partners."]
-    #[serde(rename = "authorizedPartnersList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizedPartnersList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorized_partners_list: Vec<Partner>,
 }
 impl PartnerAuthorization {
@@ -2682,7 +2788,11 @@ impl PartnerConfigurationUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartnerConfigurationsListResult {
     #[doc = "A collection of partner configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartnerConfiguration>,
     #[doc = "A link for the next page of partner configurations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2739,7 +2849,12 @@ pub struct PartnerDestinationInfo {
     #[serde(rename = "endpointServiceContext", default, skip_serializing_if = "Option::is_none")]
     pub endpoint_service_context: Option<String>,
     #[doc = "Change history of the resource move."]
-    #[serde(rename = "resourceMoveChangeHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceMoveChangeHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_move_change_history: Vec<ResourceMoveChangeHistory>,
 }
 impl PartnerDestinationInfo {
@@ -2928,7 +3043,11 @@ impl PartnerDestinationUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartnerDestinationsListResult {
     #[doc = "A collection of partner destinations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartnerDestination>,
     #[doc = "A link for the next page of partner destinations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3013,7 +3132,12 @@ impl PartnerNamespace {
 #[doc = "Properties of the partner namespace."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartnerNamespaceProperties {
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Provisioning state of the partner namespace."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3028,7 +3152,12 @@ pub struct PartnerNamespaceProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<partner_namespace_properties::PublicNetworkAccess>,
     #[doc = "This can be used to restrict traffic from specific IPs instead of all IPs. Note: These are considered only if PublicNetworkAccess is enabled."]
-    #[serde(rename = "inboundIpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundIpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_ip_rules: Vec<InboundIpRule>,
     #[doc = "This boolean is used to enable or disable local auth. Default value is false. When the property is set to true, only AAD token will be used to authenticate if user is allowed to publish to the partner namespace."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -3208,7 +3337,12 @@ pub struct PartnerNamespaceUpdateParameterProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<partner_namespace_update_parameter_properties::PublicNetworkAccess>,
     #[doc = "This can be used to restrict traffic from specific IPs instead of all IPs. Note: These are considered only if PublicNetworkAccess is enabled."]
-    #[serde(rename = "inboundIpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundIpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_ip_rules: Vec<InboundIpRule>,
     #[doc = "This boolean is used to enable or disable local auth. Default value is false. When the property is set to true, only AAD token will be used to authenticate if user is allowed to publish to the partner namespace."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -3283,7 +3417,11 @@ impl PartnerNamespaceUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartnerNamespacesListResult {
     #[doc = "A collection of partner namespaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartnerNamespace>,
     #[doc = "A link for the next page of partner namespaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3364,7 +3502,12 @@ pub struct PartnerRegistrationProperties {
     #[serde(rename = "visibilityState", default, skip_serializing_if = "Option::is_none")]
     pub visibility_state: Option<partner_registration_properties::VisibilityState>,
     #[doc = "List of Azure subscription Ids that are authorized to create a partner namespace\r\nassociated with this partner registration. This is an optional property. Creating\r\npartner namespaces is always permitted under the same Azure subscription as the one used\r\nfor creating the partner registration."]
-    #[serde(rename = "authorizedAzureSubscriptionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizedAzureSubscriptionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorized_azure_subscription_ids: Vec<String>,
 }
 impl PartnerRegistrationProperties {
@@ -3481,7 +3624,12 @@ pub struct PartnerRegistrationUpdateParameters {
     #[serde(rename = "logoUri", default, skip_serializing_if = "Option::is_none")]
     pub logo_uri: Option<String>,
     #[doc = "List of IDs of Azure AD applications that are authorized to create a partner namespace\r\nassociated with this partner registration. This is an optional property. Creating\r\npartner namespaces is always permitted under the same Azure subscription as the one used\r\nfor creating the partner registration."]
-    #[serde(rename = "authorizedAzureSubscriptionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizedAzureSubscriptionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorized_azure_subscription_ids: Vec<String>,
 }
 impl PartnerRegistrationUpdateParameters {
@@ -3493,7 +3641,11 @@ impl PartnerRegistrationUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartnerRegistrationsListResult {
     #[doc = "A collection of partner registrations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartnerRegistration>,
     #[doc = "A link for the next page of partner registrations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3698,7 +3850,11 @@ impl PartnerTopicUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartnerTopicsListResult {
     #[doc = "A collection of partner topics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartnerTopic>,
     #[doc = "A link for the next page of partner topics."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3811,7 +3967,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "A collection of private endpoint connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "A link for the next page of private endpoint connection resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3835,7 +3995,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "privateEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub private_endpoint: Option<PrivateEndpoint>,
     #[doc = "GroupIds from the private link service resource."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "ConnectionState information."]
     #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
@@ -3923,9 +4088,19 @@ pub struct PrivateLinkResourceProperties {
     pub group_id: Option<String>,
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -3937,7 +4112,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "A link for the next page of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4086,7 +4265,12 @@ pub struct ServiceBusQueueEventSubscriptionDestinationProperties {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl ServiceBusQueueEventSubscriptionDestinationProperties {
@@ -4118,7 +4302,12 @@ pub struct ServiceBusTopicEventSubscriptionDestinationProperties {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl ServiceBusTopicEventSubscriptionDestinationProperties {
@@ -4231,7 +4420,11 @@ pub struct StringBeginsWithAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringBeginsWithAdvancedFilter {
@@ -4248,7 +4441,11 @@ pub struct StringContainsAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringContainsAdvancedFilter {
@@ -4265,7 +4462,11 @@ pub struct StringEndsWithAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringEndsWithAdvancedFilter {
@@ -4282,7 +4483,11 @@ pub struct StringInAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringInAdvancedFilter {
@@ -4299,7 +4504,11 @@ pub struct StringNotBeginsWithAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringNotBeginsWithAdvancedFilter {
@@ -4316,7 +4525,11 @@ pub struct StringNotContainsAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringNotContainsAdvancedFilter {
@@ -4333,7 +4546,11 @@ pub struct StringNotEndsWithAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringNotEndsWithAdvancedFilter {
@@ -4350,7 +4567,11 @@ pub struct StringNotInAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringNotInAdvancedFilter {
@@ -4474,7 +4695,11 @@ impl SystemTopicUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SystemTopicsListResult {
     #[doc = "A collection of system Topics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SystemTopic>,
     #[doc = "A link for the next page of topics."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4576,7 +4801,12 @@ pub mod topic {
 #[doc = "Properties of the Topic."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopicProperties {
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Provisioning state of the topic."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -4597,7 +4827,12 @@ pub struct TopicProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<topic_properties::PublicNetworkAccess>,
     #[doc = "This can be used to restrict traffic from specific IPs instead of all IPs. Note: These are considered only if PublicNetworkAccess is enabled."]
-    #[serde(rename = "inboundIpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundIpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_ip_rules: Vec<InboundIpRule>,
     #[doc = "This boolean is used to enable or disable local auth. Default value is false. When the property is set to true, only AAD token will be used to authenticate if user is allowed to publish to the topic."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -4843,13 +5078,23 @@ pub struct TopicTypeProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<topic_type_properties::ProvisioningState>,
     #[doc = "List of locations supported by this topic type."]
-    #[serde(rename = "supportedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_locations: Vec<String>,
     #[doc = "Source resource format."]
     #[serde(rename = "sourceResourceFormat", default, skip_serializing_if = "Option::is_none")]
     pub source_resource_format: Option<String>,
     #[doc = "Supported source scopes."]
-    #[serde(rename = "supportedScopesForSource", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedScopesForSource",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_scopes_for_source: Vec<String>,
 }
 impl TopicTypeProperties {
@@ -4946,7 +5191,11 @@ pub mod topic_type_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopicTypesListResult {
     #[doc = "A collection of topic types"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TopicTypeInfo>,
 }
 impl azure_core::Continuable for TopicTypesListResult {
@@ -4967,7 +5216,12 @@ pub struct TopicUpdateParameterProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<topic_update_parameter_properties::PublicNetworkAccess>,
     #[doc = "This can be used to restrict traffic from specific IPs instead of all IPs. Note: These are considered only if PublicNetworkAccess is enabled."]
-    #[serde(rename = "inboundIpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundIpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_ip_rules: Vec<InboundIpRule>,
     #[doc = "This boolean is used to enable or disable local auth. Default value is false. When the property is set to true, only AAD token will be used to authenticate if user is allowed to publish to the topic."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -5088,7 +5342,11 @@ impl TopicUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopicsListResult {
     #[doc = "A collection of Topics"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Topic>,
     #[doc = "A link for the next page of topics"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5236,7 +5494,11 @@ pub mod verified_partner_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VerifiedPartnersListResult {
     #[doc = "A collection of verified partners."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VerifiedPartner>,
     #[doc = "A link for the next page of verified partners if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5296,7 +5558,12 @@ pub struct WebHookEventSubscriptionDestinationProperties {
     )]
     pub azure_active_directory_application_id_or_uri: Option<String>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl WebHookEventSubscriptionDestinationProperties {
@@ -5313,7 +5580,12 @@ pub struct WebhookPartnerDestinationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<WebhookPartnerDestinationProperties>,
     #[doc = "Change history of the resource move."]
-    #[serde(rename = "resourceMoveChangeHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceMoveChangeHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_move_change_history: Vec<ResourceMoveChangeHistory>,
 }
 impl WebhookPartnerDestinationInfo {
diff --git a/services/mgmt/eventgrid/src/package_2021_12/models.rs b/services/mgmt/eventgrid/src/package_2021_12/models.rs
index 8da928c0ac..e135a9c7d9 100644
--- a/services/mgmt/eventgrid/src/package_2021_12/models.rs
+++ b/services/mgmt/eventgrid/src/package_2021_12/models.rs
@@ -122,7 +122,12 @@ pub struct AzureFunctionEventSubscriptionDestinationProperties {
     #[serde(rename = "preferredBatchSizeInKilobytes", default, skip_serializing_if = "Option::is_none")]
     pub preferred_batch_size_in_kilobytes: Option<i32>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl AzureFunctionEventSubscriptionDestinationProperties {
@@ -278,7 +283,11 @@ impl DeadLetterWithResourceIdentity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeliveryAttributeListResult {
     #[doc = "A collection of DeliveryAttributeMapping"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeliveryAttributeMapping>,
 }
 impl DeliveryAttributeListResult {
@@ -385,7 +394,12 @@ impl Domain {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainProperties {
     #[doc = "List of private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Provisioning state of the Event Grid Domain Resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -406,7 +420,12 @@ pub struct DomainProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<domain_properties::PublicNetworkAccess>,
     #[doc = "This can be used to restrict traffic from specific IPs instead of all IPs. Note: These are considered only if PublicNetworkAccess is enabled."]
-    #[serde(rename = "inboundIpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundIpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_ip_rules: Vec<InboundIpRule>,
     #[doc = "This boolean is used to enable or disable local auth. Default value is false. When the property is set to true, only AAD token will be used to authenticate if user is allowed to publish to the domain."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -666,7 +685,11 @@ pub mod domain_topic_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainTopicsListResult {
     #[doc = "A collection of Domain Topics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DomainTopic>,
     #[doc = "A link for the next page of domain topics."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -690,7 +713,12 @@ pub struct DomainUpdateParameterProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<domain_update_parameter_properties::PublicNetworkAccess>,
     #[doc = "This can be used to restrict traffic from specific IPs instead of all IPs. Note: These are considered only if PublicNetworkAccess is enabled."]
-    #[serde(rename = "inboundIpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundIpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_ip_rules: Vec<InboundIpRule>,
     #[doc = "This boolean is used to enable or disable local auth. Default value is false. When the property is set to true, only AAD token will be used to authenticate if user is allowed to publish to the domain."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -774,7 +802,11 @@ impl DomainUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainsListResult {
     #[doc = "A collection of Domains."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Domain>,
     #[doc = "A link for the next page of domains."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -844,7 +876,12 @@ pub struct EventHubEventSubscriptionDestinationProperties {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl EventHubEventSubscriptionDestinationProperties {
@@ -941,7 +978,12 @@ pub struct EventSubscriptionFilter {
     #[serde(rename = "subjectEndsWith", default, skip_serializing_if = "Option::is_none")]
     pub subject_ends_with: Option<String>,
     #[doc = "A list of applicable event types that need to be part of the event subscription. If it is desired to subscribe to all default event types, set the IncludedEventTypes to null."]
-    #[serde(rename = "includedEventTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedEventTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_event_types: Vec<String>,
     #[doc = "Specifies if the SubjectBeginsWith and SubjectEndsWith properties of the filter\r\nshould be compared in a case sensitive manner."]
     #[serde(rename = "isSubjectCaseSensitive", default, skip_serializing_if = "Option::is_none")]
@@ -950,7 +992,12 @@ pub struct EventSubscriptionFilter {
     #[serde(rename = "enableAdvancedFilteringOnArrays", default, skip_serializing_if = "Option::is_none")]
     pub enable_advanced_filtering_on_arrays: Option<bool>,
     #[doc = "An array of advanced filters that are used for filtering event subscriptions."]
-    #[serde(rename = "advancedFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "advancedFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub advanced_filters: Vec<AdvancedFilter>,
 }
 impl EventSubscriptionFilter {
@@ -1044,7 +1091,11 @@ pub struct EventSubscriptionProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub filter: Option<EventSubscriptionFilter>,
     #[doc = "List of user defined labels."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "Expiration time of the event subscription."]
     #[serde(rename = "expirationTimeUtc", default, with = "azure_core::date::rfc3339::option")]
@@ -1175,7 +1226,11 @@ pub struct EventSubscriptionUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub filter: Option<EventSubscriptionFilter>,
     #[doc = "List of user defined labels."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "Information about the expiration time for the event subscription."]
     #[serde(rename = "expirationTimeUtc", default, with = "azure_core::date::rfc3339::option")]
@@ -1245,7 +1300,11 @@ pub mod event_subscription_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventSubscriptionsListResult {
     #[doc = "A collection of EventSubscriptions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventSubscription>,
     #[doc = "A link for the next page of event subscriptions"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1301,7 +1360,11 @@ impl EventTypeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventTypesListResult {
     #[doc = "A collection of event types"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventType>,
 }
 impl azure_core::Continuable for EventTypesListResult {
@@ -1371,7 +1434,12 @@ pub struct HybridConnectionEventSubscriptionDestinationProperties {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl HybridConnectionEventSubscriptionDestinationProperties {
@@ -1680,7 +1748,11 @@ pub struct NumberInAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<f64>,
 }
 impl NumberInAdvancedFilter {
@@ -1697,7 +1769,11 @@ pub struct NumberInRangeAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<Vec<f64>>,
 }
 impl NumberInRangeAdvancedFilter {
@@ -1748,7 +1824,11 @@ pub struct NumberNotInAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<f64>,
 }
 impl NumberNotInAdvancedFilter {
@@ -1765,7 +1845,11 @@ pub struct NumberNotInRangeAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<Vec<f64>>,
 }
 impl NumberNotInRangeAdvancedFilter {
@@ -1825,7 +1909,11 @@ impl OperationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "A collection of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationsListResult {
@@ -1868,7 +1956,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "A collection of private endpoint connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "A link for the next page of private endpoint connection resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1892,7 +1984,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "privateEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub private_endpoint: Option<PrivateEndpoint>,
     #[doc = "GroupIds from the private link service resource."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "ConnectionState information."]
     #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
@@ -1980,9 +2077,19 @@ pub struct PrivateLinkResourceProperties {
     pub group_id: Option<String>,
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1994,7 +2101,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "A link for the next page of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2068,7 +2179,12 @@ pub struct ServiceBusQueueEventSubscriptionDestinationProperties {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl ServiceBusQueueEventSubscriptionDestinationProperties {
@@ -2100,7 +2216,12 @@ pub struct ServiceBusTopicEventSubscriptionDestinationProperties {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl ServiceBusTopicEventSubscriptionDestinationProperties {
@@ -2213,7 +2334,11 @@ pub struct StringBeginsWithAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringBeginsWithAdvancedFilter {
@@ -2230,7 +2355,11 @@ pub struct StringContainsAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringContainsAdvancedFilter {
@@ -2247,7 +2376,11 @@ pub struct StringEndsWithAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringEndsWithAdvancedFilter {
@@ -2264,7 +2397,11 @@ pub struct StringInAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringInAdvancedFilter {
@@ -2281,7 +2418,11 @@ pub struct StringNotBeginsWithAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringNotBeginsWithAdvancedFilter {
@@ -2298,7 +2439,11 @@ pub struct StringNotContainsAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringNotContainsAdvancedFilter {
@@ -2315,7 +2460,11 @@ pub struct StringNotEndsWithAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringNotEndsWithAdvancedFilter {
@@ -2332,7 +2481,11 @@ pub struct StringNotInAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringNotInAdvancedFilter {
@@ -2456,7 +2609,11 @@ impl SystemTopicUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SystemTopicsListResult {
     #[doc = "A collection of system Topics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SystemTopic>,
     #[doc = "A link for the next page of topics."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2501,7 +2658,12 @@ impl Topic {
 #[doc = "Properties of the Topic"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopicProperties {
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Provisioning state of the topic."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2522,7 +2684,12 @@ pub struct TopicProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<topic_properties::PublicNetworkAccess>,
     #[doc = "This can be used to restrict traffic from specific IPs instead of all IPs. Note: These are considered only if PublicNetworkAccess is enabled."]
-    #[serde(rename = "inboundIpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundIpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_ip_rules: Vec<InboundIpRule>,
     #[doc = "This boolean is used to enable or disable local auth. Default value is false. When the property is set to true, only AAD token will be used to authenticate if user is allowed to publish to the topic."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -2728,13 +2895,23 @@ pub struct TopicTypeProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<topic_type_properties::ProvisioningState>,
     #[doc = "List of locations supported by this topic type."]
-    #[serde(rename = "supportedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_locations: Vec<String>,
     #[doc = "Source resource format."]
     #[serde(rename = "sourceResourceFormat", default, skip_serializing_if = "Option::is_none")]
     pub source_resource_format: Option<String>,
     #[doc = "Supported source scopes."]
-    #[serde(rename = "supportedScopesForSource", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedScopesForSource",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_scopes_for_source: Vec<String>,
 }
 impl TopicTypeProperties {
@@ -2831,7 +3008,11 @@ pub mod topic_type_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopicTypesListResult {
     #[doc = "A collection of topic types"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TopicTypeInfo>,
 }
 impl azure_core::Continuable for TopicTypesListResult {
@@ -2852,7 +3033,12 @@ pub struct TopicUpdateParameterProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<topic_update_parameter_properties::PublicNetworkAccess>,
     #[doc = "This can be used to restrict traffic from specific IPs instead of all IPs. Note: These are considered only if PublicNetworkAccess is enabled."]
-    #[serde(rename = "inboundIpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundIpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_ip_rules: Vec<InboundIpRule>,
     #[doc = "This boolean is used to enable or disable local auth. Default value is false. When the property is set to true, only AAD token will be used to authenticate if user is allowed to publish to the topic."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -2930,7 +3116,11 @@ impl TopicUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopicsListResult {
     #[doc = "A collection of Topics"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Topic>,
     #[doc = "A link for the next page of topics"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3025,7 +3215,12 @@ pub struct WebHookEventSubscriptionDestinationProperties {
     )]
     pub azure_active_directory_application_id_or_uri: Option<String>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl WebHookEventSubscriptionDestinationProperties {
diff --git a/services/mgmt/eventgrid/src/package_2022_06/models.rs b/services/mgmt/eventgrid/src/package_2022_06/models.rs
index 5592067bb0..d078fe7f7f 100644
--- a/services/mgmt/eventgrid/src/package_2022_06/models.rs
+++ b/services/mgmt/eventgrid/src/package_2022_06/models.rs
@@ -122,7 +122,12 @@ pub struct AzureFunctionEventSubscriptionDestinationProperties {
     #[serde(rename = "preferredBatchSizeInKilobytes", default, skip_serializing_if = "Option::is_none")]
     pub preferred_batch_size_in_kilobytes: Option<i32>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl AzureFunctionEventSubscriptionDestinationProperties {
@@ -346,7 +351,11 @@ impl ChannelUpdateParametersProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChannelsListResult {
     #[doc = "A collection of Channels."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Channel>,
     #[doc = "A link for the next page of channels."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -494,7 +503,11 @@ impl DeadLetterWithResourceIdentity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeliveryAttributeListResult {
     #[doc = "A collection of DeliveryAttributeMapping"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeliveryAttributeMapping>,
 }
 impl DeliveryAttributeListResult {
@@ -601,7 +614,12 @@ impl Domain {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainProperties {
     #[doc = "List of private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Provisioning state of the Event Grid Domain Resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -622,7 +640,12 @@ pub struct DomainProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<domain_properties::PublicNetworkAccess>,
     #[doc = "This can be used to restrict traffic from specific IPs instead of all IPs. Note: These are considered only if PublicNetworkAccess is enabled."]
-    #[serde(rename = "inboundIpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundIpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_ip_rules: Vec<InboundIpRule>,
     #[doc = "This boolean is used to enable or disable local auth. Default value is false. When the property is set to true, only AAD token will be used to authenticate if user is allowed to publish to the domain."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -922,7 +945,11 @@ pub mod domain_topic_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainTopicsListResult {
     #[doc = "A collection of Domain Topics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DomainTopic>,
     #[doc = "A link for the next page of domain topics."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -946,7 +973,12 @@ pub struct DomainUpdateParameterProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<domain_update_parameter_properties::PublicNetworkAccess>,
     #[doc = "This can be used to restrict traffic from specific IPs instead of all IPs. Note: These are considered only if PublicNetworkAccess is enabled."]
-    #[serde(rename = "inboundIpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundIpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_ip_rules: Vec<InboundIpRule>,
     #[doc = "This boolean is used to enable or disable local auth. Default value is false. When the property is set to true, only AAD token will be used to authenticate if user is allowed to publish to the domain."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -1070,7 +1102,11 @@ impl DomainUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainsListResult {
     #[doc = "A collection of Domains."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Domain>,
     #[doc = "A link for the next page of domains."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1140,7 +1176,12 @@ pub struct EventHubEventSubscriptionDestinationProperties {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl EventHubEventSubscriptionDestinationProperties {
@@ -1237,7 +1278,12 @@ pub struct EventSubscriptionFilter {
     #[serde(rename = "subjectEndsWith", default, skip_serializing_if = "Option::is_none")]
     pub subject_ends_with: Option<String>,
     #[doc = "A list of applicable event types that need to be part of the event subscription. If it is desired to subscribe to all default event types, set the IncludedEventTypes to null."]
-    #[serde(rename = "includedEventTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedEventTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_event_types: Vec<String>,
     #[doc = "Specifies if the SubjectBeginsWith and SubjectEndsWith properties of the filter\r\nshould be compared in a case sensitive manner."]
     #[serde(rename = "isSubjectCaseSensitive", default, skip_serializing_if = "Option::is_none")]
@@ -1246,7 +1292,12 @@ pub struct EventSubscriptionFilter {
     #[serde(rename = "enableAdvancedFilteringOnArrays", default, skip_serializing_if = "Option::is_none")]
     pub enable_advanced_filtering_on_arrays: Option<bool>,
     #[doc = "An array of advanced filters that are used for filtering event subscriptions."]
-    #[serde(rename = "advancedFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "advancedFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub advanced_filters: Vec<AdvancedFilter>,
 }
 impl EventSubscriptionFilter {
@@ -1340,7 +1391,11 @@ pub struct EventSubscriptionProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub filter: Option<EventSubscriptionFilter>,
     #[doc = "List of user defined labels."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "Expiration time of the event subscription."]
     #[serde(rename = "expirationTimeUtc", default, with = "azure_core::date::rfc3339::option")]
@@ -1471,7 +1526,11 @@ pub struct EventSubscriptionUpdateParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub filter: Option<EventSubscriptionFilter>,
     #[doc = "List of user defined labels."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "Information about the expiration time for the event subscription."]
     #[serde(rename = "expirationTimeUtc", default, with = "azure_core::date::rfc3339::option")]
@@ -1541,7 +1600,11 @@ pub mod event_subscription_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventSubscriptionsListResult {
     #[doc = "A collection of EventSubscriptions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventSubscription>,
     #[doc = "A link for the next page of event subscriptions"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1650,7 +1713,11 @@ impl EventTypeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventTypesListResult {
     #[doc = "A collection of event types"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventType>,
 }
 impl azure_core::Continuable for EventTypesListResult {
@@ -1720,7 +1787,12 @@ pub struct HybridConnectionEventSubscriptionDestinationProperties {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl HybridConnectionEventSubscriptionDestinationProperties {
@@ -2050,7 +2122,11 @@ pub struct NumberInAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<f64>,
 }
 impl NumberInAdvancedFilter {
@@ -2067,7 +2143,11 @@ pub struct NumberInRangeAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<Vec<f64>>,
 }
 impl NumberInRangeAdvancedFilter {
@@ -2118,7 +2198,11 @@ pub struct NumberNotInAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<f64>,
 }
 impl NumberNotInAdvancedFilter {
@@ -2135,7 +2219,11 @@ pub struct NumberNotInRangeAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<Vec<f64>>,
 }
 impl NumberNotInRangeAdvancedFilter {
@@ -2195,7 +2283,11 @@ impl OperationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "A collection of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationsListResult {
@@ -2234,7 +2326,12 @@ pub struct PartnerAuthorization {
     #[serde(rename = "defaultMaximumExpirationTimeInDays", default, skip_serializing_if = "Option::is_none")]
     pub default_maximum_expiration_time_in_days: Option<i32>,
     #[doc = "The list of authorized partners."]
-    #[serde(rename = "authorizedPartnersList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizedPartnersList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorized_partners_list: Vec<Partner>,
 }
 impl PartnerAuthorization {
@@ -2359,7 +2456,11 @@ impl PartnerConfigurationUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartnerConfigurationsListResult {
     #[doc = "A collection of partner configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartnerConfiguration>,
     #[doc = "A link for the next page of partner configurations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2418,7 +2519,12 @@ impl PartnerNamespace {
 #[doc = "Properties of the partner namespace."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartnerNamespaceProperties {
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Provisioning state of the partner namespace."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2433,7 +2539,12 @@ pub struct PartnerNamespaceProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<partner_namespace_properties::PublicNetworkAccess>,
     #[doc = "This can be used to restrict traffic from specific IPs instead of all IPs. Note: These are considered only if PublicNetworkAccess is enabled."]
-    #[serde(rename = "inboundIpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundIpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_ip_rules: Vec<InboundIpRule>,
     #[doc = "This boolean is used to enable or disable local auth. Default value is false. When the property is set to true, only AAD token will be used to authenticate if user is allowed to publish to the partner namespace."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -2613,7 +2724,12 @@ pub struct PartnerNamespaceUpdateParameterProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<partner_namespace_update_parameter_properties::PublicNetworkAccess>,
     #[doc = "This can be used to restrict traffic from specific IPs instead of all IPs. Note: These are considered only if PublicNetworkAccess is enabled."]
-    #[serde(rename = "inboundIpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundIpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_ip_rules: Vec<InboundIpRule>,
     #[doc = "This boolean is used to enable or disable local auth. Default value is false. When the property is set to true, only AAD token will be used to authenticate if user is allowed to publish to the partner namespace."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -2688,7 +2804,11 @@ impl PartnerNamespaceUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartnerNamespacesListResult {
     #[doc = "A collection of partner namespaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartnerNamespace>,
     #[doc = "A link for the next page of partner namespaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2805,7 +2925,11 @@ impl PartnerRegistrationUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartnerRegistrationsListResult {
     #[doc = "A collection of partner registrations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartnerRegistration>,
     #[doc = "A link for the next page of partner registrations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3014,7 +3138,11 @@ impl PartnerTopicUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartnerTopicsListResult {
     #[doc = "A collection of partner topics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PartnerTopic>,
     #[doc = "A link for the next page of partner topics."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3072,7 +3200,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "A collection of private endpoint connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "A link for the next page of private endpoint connection resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3096,7 +3228,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "privateEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub private_endpoint: Option<PrivateEndpoint>,
     #[doc = "GroupIds from the private link service resource."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "ConnectionState information."]
     #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
@@ -3184,9 +3321,19 @@ pub struct PrivateLinkResourceProperties {
     pub group_id: Option<String>,
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -3198,7 +3345,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "A link for the next page of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3272,7 +3423,12 @@ pub struct ServiceBusQueueEventSubscriptionDestinationProperties {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl ServiceBusQueueEventSubscriptionDestinationProperties {
@@ -3304,7 +3460,12 @@ pub struct ServiceBusTopicEventSubscriptionDestinationProperties {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl ServiceBusTopicEventSubscriptionDestinationProperties {
@@ -3417,7 +3578,11 @@ pub struct StringBeginsWithAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringBeginsWithAdvancedFilter {
@@ -3434,7 +3599,11 @@ pub struct StringContainsAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringContainsAdvancedFilter {
@@ -3451,7 +3620,11 @@ pub struct StringEndsWithAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringEndsWithAdvancedFilter {
@@ -3468,7 +3641,11 @@ pub struct StringInAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringInAdvancedFilter {
@@ -3485,7 +3662,11 @@ pub struct StringNotBeginsWithAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringNotBeginsWithAdvancedFilter {
@@ -3502,7 +3683,11 @@ pub struct StringNotContainsAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringNotContainsAdvancedFilter {
@@ -3519,7 +3704,11 @@ pub struct StringNotEndsWithAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringNotEndsWithAdvancedFilter {
@@ -3536,7 +3725,11 @@ pub struct StringNotInAdvancedFilter {
     #[serde(flatten)]
     pub advanced_filter: AdvancedFilter,
     #[doc = "The set of filter values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl StringNotInAdvancedFilter {
@@ -3660,7 +3853,11 @@ impl SystemTopicUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SystemTopicsListResult {
     #[doc = "A collection of system Topics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SystemTopic>,
     #[doc = "A link for the next page of topics."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3705,7 +3902,12 @@ impl Topic {
 #[doc = "Properties of the Topic."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopicProperties {
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Provisioning state of the topic."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3726,7 +3928,12 @@ pub struct TopicProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<topic_properties::PublicNetworkAccess>,
     #[doc = "This can be used to restrict traffic from specific IPs instead of all IPs. Note: These are considered only if PublicNetworkAccess is enabled."]
-    #[serde(rename = "inboundIpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundIpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_ip_rules: Vec<InboundIpRule>,
     #[doc = "This boolean is used to enable or disable local auth. Default value is false. When the property is set to true, only AAD token will be used to authenticate if user is allowed to publish to the topic."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -3972,13 +4179,23 @@ pub struct TopicTypeProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<topic_type_properties::ProvisioningState>,
     #[doc = "List of locations supported by this topic type."]
-    #[serde(rename = "supportedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_locations: Vec<String>,
     #[doc = "Source resource format."]
     #[serde(rename = "sourceResourceFormat", default, skip_serializing_if = "Option::is_none")]
     pub source_resource_format: Option<String>,
     #[doc = "Supported source scopes."]
-    #[serde(rename = "supportedScopesForSource", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedScopesForSource",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_scopes_for_source: Vec<String>,
 }
 impl TopicTypeProperties {
@@ -4075,7 +4292,11 @@ pub mod topic_type_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopicTypesListResult {
     #[doc = "A collection of topic types"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TopicTypeInfo>,
 }
 impl azure_core::Continuable for TopicTypesListResult {
@@ -4096,7 +4317,12 @@ pub struct TopicUpdateParameterProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<topic_update_parameter_properties::PublicNetworkAccess>,
     #[doc = "This can be used to restrict traffic from specific IPs instead of all IPs. Note: These are considered only if PublicNetworkAccess is enabled."]
-    #[serde(rename = "inboundIpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundIpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_ip_rules: Vec<InboundIpRule>,
     #[doc = "This boolean is used to enable or disable local auth. Default value is false. When the property is set to true, only AAD token will be used to authenticate if user is allowed to publish to the topic."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -4214,7 +4440,11 @@ impl TopicUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopicsListResult {
     #[doc = "A collection of Topics"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Topic>,
     #[doc = "A link for the next page of topics"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4359,7 +4589,11 @@ pub mod verified_partner_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VerifiedPartnersListResult {
     #[doc = "A collection of verified partners."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VerifiedPartner>,
     #[doc = "A link for the next page of verified partners if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4419,7 +4653,12 @@ pub struct WebHookEventSubscriptionDestinationProperties {
     )]
     pub azure_active_directory_application_id_or_uri: Option<String>,
     #[doc = "Delivery attribute details."]
-    #[serde(rename = "deliveryAttributeMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttributeMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attribute_mappings: Vec<DeliveryAttributeMapping>,
 }
 impl WebHookEventSubscriptionDestinationProperties {
diff --git a/services/mgmt/eventhub/src/package_2018_01_preview/models.rs b/services/mgmt/eventhub/src/package_2018_01_preview/models.rs
index 284484d98f..b97afb7f65 100644
--- a/services/mgmt/eventhub/src/package_2018_01_preview/models.rs
+++ b/services/mgmt/eventhub/src/package_2018_01_preview/models.rs
@@ -95,7 +95,11 @@ pub mod arm_disaster_recovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArmDisasterRecoveryListResult {
     #[doc = "List of Alias(Disaster Recovery configurations)"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArmDisasterRecovery>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Alias(Disaster Recovery configuration)"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -144,7 +148,11 @@ pub mod authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationRuleListResult {
     #[doc = "Result of the List Authorization Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AuthorizationRule>,
     #[doc = "Link to the next set of results. Not empty if Value contains an incomplete list of Authorization Rules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -177,7 +185,11 @@ impl AvailableCluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableClustersList {
     #[doc = "The count of readily available and pre-provisioned Event Hubs Clusters per region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableCluster>,
 }
 impl AvailableClustersList {
@@ -295,7 +307,11 @@ pub mod cluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListResult {
     #[doc = "The Event Hubs Clusters present in the List Event Hubs operation results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "Link to the next set of results. Empty unless the value parameter contains an incomplete list of Event Hubs Clusters."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -474,7 +490,11 @@ pub mod consumer_group {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConsumerGroupListResult {
     #[doc = "Result of the List Consumer Group operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConsumerGroup>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Consumer Group"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -611,7 +631,11 @@ impl EhNamespaceIdContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EhNamespaceIdListResult {
     #[doc = "Result of the List Namespace IDs operation"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EhNamespaceIdContainer>,
 }
 impl EhNamespaceIdListResult {
@@ -623,7 +647,11 @@ impl EhNamespaceIdListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EhNamespaceListResult {
     #[doc = "Result of the List Namespace operation"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EhNamespace>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of namespaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -644,7 +672,12 @@ impl EhNamespaceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Encryption {
     #[doc = "Properties of KeyVault"]
-    #[serde(rename = "keyVaultProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyVaultProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_vault_properties: Vec<KeyVaultProperties>,
     #[doc = "Enumerates the possible value of keySource for Encryption"]
     #[serde(rename = "keySource", default, skip_serializing_if = "Option::is_none")]
@@ -694,7 +727,11 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventHubListResult {
     #[doc = "Result of the List EventHubs operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Eventhub>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of EventHubs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -731,7 +768,12 @@ pub mod eventhub {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "Current number of shards on the Event Hub."]
-        #[serde(rename = "partitionIds", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "partitionIds",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub partition_ids: Vec<String>,
         #[doc = "Exact time the Event Hub was created."]
         #[serde(rename = "createdAt", default, with = "azure_core::date::rfc3339::option")]
@@ -884,7 +926,11 @@ pub mod ip_filter_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IpFilterRuleListResult {
     #[doc = "Result of the List IpFilter Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IpFilterRule>,
     #[doc = "Link to the next set of results. Not empty if Value contains an incomplete list of IpFilter Rules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -955,7 +1001,11 @@ pub mod messaging_regions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MessagingRegionsListResult {
     #[doc = "Result of the List MessagingRegions type."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MessagingRegions>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of MessagingRegions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1066,10 +1116,20 @@ pub mod network_rule_set {
         #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
         pub default_action: Option<properties::DefaultAction>,
         #[doc = "List VirtualNetwork Rules"]
-        #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "virtualNetworkRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub virtual_network_rules: Vec<NwRuleSetVirtualNetworkRules>,
         #[doc = "List of IpRules"]
-        #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_rules: Vec<NwRuleSetIpRules>,
     }
     impl Properties {
@@ -1158,7 +1218,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Event Hub operations supported by the Microsoft.EventHub resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1205,7 +1269,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "A collection of private endpoint connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "A link for the next page of private endpoint connection resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1316,10 +1384,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1331,7 +1409,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "A link for the next page of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1554,7 +1636,11 @@ pub mod virtual_network_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkRuleListResult {
     #[doc = "Result of the List VirtualNetwork Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkRule>,
     #[doc = "Link to the next set of results. Not empty if Value contains an incomplete list of VirtualNetwork Rules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/eventhub/src/package_2021_01_preview/models.rs b/services/mgmt/eventhub/src/package_2021_01_preview/models.rs
index f0fc4c013c..9e9369cec7 100644
--- a/services/mgmt/eventhub/src/package_2021_01_preview/models.rs
+++ b/services/mgmt/eventhub/src/package_2021_01_preview/models.rs
@@ -98,7 +98,11 @@ pub mod arm_disaster_recovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArmDisasterRecoveryListResult {
     #[doc = "List of Alias(Disaster Recovery configurations)"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArmDisasterRecovery>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Alias(Disaster Recovery configuration)"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -150,7 +154,11 @@ pub mod authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationRuleListResult {
     #[doc = "Result of the List Authorization Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AuthorizationRule>,
     #[doc = "Link to the next set of results. Not empty if Value contains an incomplete list of Authorization Rules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -333,7 +341,11 @@ pub mod consumer_group {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConsumerGroupListResult {
     #[doc = "Result of the List Consumer Group operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConsumerGroup>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Consumer Group"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -451,7 +463,12 @@ pub mod eh_namespace {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub encryption: Option<Encryption>,
         #[doc = "List of private endpoint connections."]
-        #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "privateEndpointConnections",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     }
     impl Properties {
@@ -464,7 +481,11 @@ pub mod eh_namespace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EhNamespaceListResult {
     #[doc = "Result of the List Namespace operation"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EhNamespace>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of namespaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -485,7 +506,12 @@ impl EhNamespaceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Encryption {
     #[doc = "Properties of KeyVault"]
-    #[serde(rename = "keyVaultProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyVaultProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_vault_properties: Vec<KeyVaultProperties>,
     #[doc = "Enumerates the possible value of keySource for Encryption"]
     #[serde(rename = "keySource", default, skip_serializing_if = "Option::is_none")]
@@ -538,7 +564,11 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventHubListResult {
     #[doc = "Result of the List EventHubs operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Eventhub>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of EventHubs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -578,7 +608,12 @@ pub mod eventhub {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "Current number of shards on the Event Hub."]
-        #[serde(rename = "partitionIds", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "partitionIds",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub partition_ids: Vec<String>,
         #[doc = "Exact time the Event Hub was created."]
         #[serde(rename = "createdAt", default, with = "azure_core::date::rfc3339::option")]
@@ -771,10 +806,20 @@ pub mod network_rule_set {
         #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
         pub default_action: Option<properties::DefaultAction>,
         #[doc = "List VirtualNetwork Rules"]
-        #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "virtualNetworkRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub virtual_network_rules: Vec<NwRuleSetVirtualNetworkRules>,
         #[doc = "List of IpRules"]
-        #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_rules: Vec<NwRuleSetIpRules>,
     }
     impl Properties {
@@ -863,7 +908,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Event Hub operations supported by the Microsoft.EventHub resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -913,7 +962,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "A collection of private endpoint connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "A link for the next page of private endpoint connection resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1024,10 +1077,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1039,7 +1102,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "A link for the next page of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/eventhub/src/package_2021_06_preview/models.rs b/services/mgmt/eventhub/src/package_2021_06_preview/models.rs
index 9a67823239..77d197f047 100644
--- a/services/mgmt/eventhub/src/package_2021_06_preview/models.rs
+++ b/services/mgmt/eventhub/src/package_2021_06_preview/models.rs
@@ -98,7 +98,11 @@ pub mod arm_disaster_recovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArmDisasterRecoveryListResult {
     #[doc = "List of Alias(Disaster Recovery configurations)"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArmDisasterRecovery>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Alias(Disaster Recovery configuration)"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -150,7 +154,11 @@ pub mod authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationRuleListResult {
     #[doc = "Result of the List Authorization Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AuthorizationRule>,
     #[doc = "Link to the next set of results. Not empty if Value contains an incomplete list of Authorization Rules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -183,7 +191,11 @@ impl AvailableCluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableClustersList {
     #[doc = "The count of readily available and pre-provisioned Event Hubs Clusters per region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableCluster>,
 }
 impl AvailableClustersList {
@@ -304,7 +316,11 @@ pub mod cluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListResult {
     #[doc = "The Event Hubs Clusters present in the List Event Hubs operation results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "Link to the next set of results. Empty unless the value parameter contains an incomplete list of Event Hubs Clusters."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -486,7 +502,11 @@ pub mod consumer_group {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConsumerGroupListResult {
     #[doc = "Result of the List Consumer Group operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConsumerGroup>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Consumer Group"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -604,7 +624,12 @@ pub mod eh_namespace {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub encryption: Option<Encryption>,
         #[doc = "List of private endpoint connections."]
-        #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "privateEndpointConnections",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
         #[doc = "This property disables SAS authentication for the Event Hubs namespace."]
         #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -632,7 +657,11 @@ impl EhNamespaceIdContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EhNamespaceIdListResult {
     #[doc = "Result of the List Namespace IDs operation"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EhNamespaceIdContainer>,
 }
 impl EhNamespaceIdListResult {
@@ -644,7 +673,11 @@ impl EhNamespaceIdListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EhNamespaceListResult {
     #[doc = "Result of the List Namespace operation"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EhNamespace>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of namespaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -665,7 +698,12 @@ impl EhNamespaceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Encryption {
     #[doc = "Properties of KeyVault"]
-    #[serde(rename = "keyVaultProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyVaultProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_vault_properties: Vec<KeyVaultProperties>,
     #[doc = "Enumerates the possible value of keySource for Encryption"]
     #[serde(rename = "keySource", default, skip_serializing_if = "Option::is_none")]
@@ -718,7 +756,11 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventHubListResult {
     #[doc = "Result of the List EventHubs operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Eventhub>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of EventHubs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -758,7 +800,12 @@ pub mod eventhub {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "Current number of shards on the Event Hub."]
-        #[serde(rename = "partitionIds", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "partitionIds",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub partition_ids: Vec<String>,
         #[doc = "Exact time the Event Hub was created."]
         #[serde(rename = "createdAt", default, with = "azure_core::date::rfc3339::option")]
@@ -951,10 +998,20 @@ pub mod network_rule_set {
         #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
         pub default_action: Option<properties::DefaultAction>,
         #[doc = "List VirtualNetwork Rules"]
-        #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "virtualNetworkRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub virtual_network_rules: Vec<NwRuleSetVirtualNetworkRules>,
         #[doc = "List of IpRules"]
-        #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_rules: Vec<NwRuleSetIpRules>,
         #[doc = "This determines if traffic is allowed over public network. By default it is enabled."]
         #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -1088,7 +1145,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Event Hub operations supported by the Microsoft.EventHub resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1138,7 +1199,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "A collection of private endpoint connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "A link for the next page of private endpoint connection resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1249,10 +1314,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1264,7 +1339,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "A link for the next page of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/eventhub/src/package_2021_11/models.rs b/services/mgmt/eventhub/src/package_2021_11/models.rs
index 2288b1233f..80d93ee968 100644
--- a/services/mgmt/eventhub/src/package_2021_11/models.rs
+++ b/services/mgmt/eventhub/src/package_2021_11/models.rs
@@ -98,7 +98,11 @@ pub mod arm_disaster_recovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArmDisasterRecoveryListResult {
     #[doc = "List of Alias(Disaster Recovery configurations)"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArmDisasterRecovery>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Alias(Disaster Recovery configuration)"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -150,7 +154,11 @@ pub mod authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationRuleListResult {
     #[doc = "Result of the List Authorization Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AuthorizationRule>,
     #[doc = "Link to the next set of results. Not empty if Value contains an incomplete list of Authorization Rules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -183,7 +191,11 @@ impl AvailableCluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableClustersList {
     #[doc = "The count of readily available and pre-provisioned Event Hubs Clusters per region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableCluster>,
 }
 impl AvailableClustersList {
@@ -304,7 +316,11 @@ pub mod cluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListResult {
     #[doc = "The Event Hubs Clusters present in the List Event Hubs operation results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "Link to the next set of results. Empty unless the value parameter contains an incomplete list of Event Hubs Clusters."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -486,7 +502,11 @@ pub mod consumer_group {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConsumerGroupListResult {
     #[doc = "Result of the List Consumer Group operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConsumerGroup>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Consumer Group"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -613,7 +633,12 @@ pub mod eh_namespace {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub encryption: Option<Encryption>,
         #[doc = "List of private endpoint connections."]
-        #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "privateEndpointConnections",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
         #[doc = "This property disables SAS authentication for the Event Hubs namespace."]
         #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -644,7 +669,11 @@ impl EhNamespaceIdContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EhNamespaceIdListResult {
     #[doc = "Result of the List Namespace IDs operation"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EhNamespaceIdContainer>,
 }
 impl EhNamespaceIdListResult {
@@ -656,7 +685,11 @@ impl EhNamespaceIdListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EhNamespaceListResult {
     #[doc = "Result of the List Namespace operation"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EhNamespace>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of namespaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -677,7 +710,12 @@ impl EhNamespaceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Encryption {
     #[doc = "Properties of KeyVault"]
-    #[serde(rename = "keyVaultProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyVaultProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_vault_properties: Vec<KeyVaultProperties>,
     #[doc = "Enumerates the possible value of keySource for Encryption"]
     #[serde(rename = "keySource", default, skip_serializing_if = "Option::is_none")]
@@ -733,10 +771,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -766,7 +813,11 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventHubListResult {
     #[doc = "Result of the List EventHubs operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Eventhub>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of EventHubs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -806,7 +857,12 @@ pub mod eventhub {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "Current number of shards on the Event Hub."]
-        #[serde(rename = "partitionIds", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "partitionIds",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub partition_ids: Vec<String>,
         #[doc = "Exact time the Event Hub was created."]
         #[serde(rename = "createdAt", default, with = "azure_core::date::rfc3339::option")]
@@ -999,10 +1055,20 @@ pub mod network_rule_set {
         #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
         pub default_action: Option<properties::DefaultAction>,
         #[doc = "List VirtualNetwork Rules"]
-        #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "virtualNetworkRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub virtual_network_rules: Vec<NwRuleSetVirtualNetworkRules>,
         #[doc = "List of IpRules"]
-        #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_rules: Vec<NwRuleSetIpRules>,
         #[doc = "This determines if traffic is allowed over public network. By default it is enabled."]
         #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -1100,7 +1166,11 @@ pub mod network_rule_set {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkRuleSetListResult {
     #[doc = "Result of the List NetworkRuleSet operation"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkRuleSet>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of NetworkRuleSet."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1160,7 +1230,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Event Hub operations supported by the Microsoft.EventHub resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1210,7 +1284,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "A collection of private endpoint connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "A link for the next page of private endpoint connection resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1321,10 +1399,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1336,7 +1424,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "A link for the next page of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1571,7 +1663,11 @@ pub mod schema_group {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SchemaGroupListResult {
     #[doc = "Result of the List SchemaGroups operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SchemaGroup>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Schema Groups."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/eventhub/src/package_2022_01_preview/models.rs b/services/mgmt/eventhub/src/package_2022_01_preview/models.rs
index c731d75868..2b25f5eced 100644
--- a/services/mgmt/eventhub/src/package_2022_01_preview/models.rs
+++ b/services/mgmt/eventhub/src/package_2022_01_preview/models.rs
@@ -60,7 +60,11 @@ pub mod application_group {
         #[serde(rename = "clientAppGroupIdentifier")]
         pub client_app_group_identifier: String,
         #[doc = "List of group policies that define the behavior of application group. The policies can support resource governance scenarios such as limiting ingress or egress traffic."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub policies: Vec<ApplicationGroupPolicy>,
     }
     impl Properties {
@@ -77,7 +81,11 @@ pub mod application_group {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGroupListResult {
     #[doc = "Result of the List Application Groups operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationGroup>,
     #[doc = "Link to the next set of results. Not empty if Value contains an incomplete list of Authorization Rules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -211,7 +219,11 @@ pub mod arm_disaster_recovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArmDisasterRecoveryListResult {
     #[doc = "List of Alias(Disaster Recovery configurations)"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArmDisasterRecovery>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Alias(Disaster Recovery configuration)"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -263,7 +275,11 @@ pub mod authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationRuleListResult {
     #[doc = "Result of the List Authorization Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AuthorizationRule>,
     #[doc = "Link to the next set of results. Not empty if Value contains an incomplete list of Authorization Rules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -296,7 +312,11 @@ impl AvailableCluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableClustersList {
     #[doc = "The count of readily available and pre-provisioned Event Hubs Clusters per region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableCluster>,
 }
 impl AvailableClustersList {
@@ -420,7 +440,11 @@ pub mod cluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListResult {
     #[doc = "The Event Hubs Clusters present in the List Event Hubs operation results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "Link to the next set of results. Empty unless the value parameter contains an incomplete list of Event Hubs Clusters."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -602,7 +626,11 @@ pub mod consumer_group {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConsumerGroupListResult {
     #[doc = "Result of the List Consumer Group operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConsumerGroup>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Consumer Group"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -735,7 +763,12 @@ pub mod eh_namespace {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub encryption: Option<Encryption>,
         #[doc = "List of private endpoint connections."]
-        #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "privateEndpointConnections",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
         #[doc = "This property disables SAS authentication for the Event Hubs namespace."]
         #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -855,7 +888,11 @@ impl EhNamespaceIdContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EhNamespaceIdListResult {
     #[doc = "Result of the List Namespace IDs operation"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EhNamespaceIdContainer>,
 }
 impl EhNamespaceIdListResult {
@@ -867,7 +904,11 @@ impl EhNamespaceIdListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EhNamespaceListResult {
     #[doc = "Result of the List Namespace operation"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EhNamespace>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of namespaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -888,7 +929,12 @@ impl EhNamespaceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Encryption {
     #[doc = "Properties of KeyVault"]
-    #[serde(rename = "keyVaultProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyVaultProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_vault_properties: Vec<KeyVaultProperties>,
     #[doc = "Enumerates the possible value of keySource for Encryption"]
     #[serde(rename = "keySource", default, skip_serializing_if = "Option::is_none")]
@@ -944,10 +990,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -977,7 +1032,11 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventHubListResult {
     #[doc = "Result of the List EventHubs operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Eventhub>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of EventHubs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1017,7 +1076,12 @@ pub mod eventhub {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "Current number of shards on the Event Hub."]
-        #[serde(rename = "partitionIds", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "partitionIds",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub partition_ids: Vec<String>,
         #[doc = "Exact time the Event Hub was created."]
         #[serde(rename = "createdAt", default, with = "azure_core::date::rfc3339::option")]
@@ -1210,10 +1274,20 @@ pub mod network_rule_set {
         #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
         pub default_action: Option<properties::DefaultAction>,
         #[doc = "List VirtualNetwork Rules"]
-        #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "virtualNetworkRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub virtual_network_rules: Vec<NwRuleSetVirtualNetworkRules>,
         #[doc = "List of IpRules"]
-        #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_rules: Vec<NwRuleSetIpRules>,
         #[doc = "This determines if traffic is allowed over public network. By default it is enabled. If value is SecuredByPerimeter then Inbound and Outbound communication is controlled by the network security perimeter and profile's access rules. "]
         #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -1313,7 +1387,11 @@ pub mod network_rule_set {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkRuleSetListResult {
     #[doc = "Result of the List NetworkRuleSet operation"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkRuleSet>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of NetworkRuleSet."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1360,7 +1438,11 @@ impl NetworkSecurityPerimeterConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkSecurityPerimeterConfigurationList {
     #[doc = "A collection of NetworkSecurityPerimeterConfigurations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkSecurityPerimeterConfiguration>,
 }
 impl NetworkSecurityPerimeterConfigurationList {
@@ -1375,7 +1457,12 @@ pub struct NetworkSecurityPerimeterConfigurationProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<network_security_perimeter_configuration_properties::ProvisioningState>,
     #[doc = "List of Provisioning Issues if any"]
-    #[serde(rename = "provisioningIssues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisioningIssues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provisioning_issues: Vec<ProvisioningIssue>,
     #[doc = "NetworkSecurityPerimeter related information"]
     #[serde(rename = "networkSecurityPerimeter", default, skip_serializing_if = "Option::is_none")]
@@ -1520,7 +1607,12 @@ pub mod network_security_perimeter_configuration_properties {
         #[serde(rename = "accessRulesVersion", default, skip_serializing_if = "Option::is_none")]
         pub access_rules_version: Option<String>,
         #[doc = "List of Access Rules"]
-        #[serde(rename = "accessRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "accessRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub access_rules: Vec<NspAccessRule>,
     }
     impl Profile {
@@ -1559,16 +1651,35 @@ pub mod nsp_access_rule {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub direction: Option<properties::Direction>,
         #[doc = "Address prefixes in the CIDR format for inbound rules"]
-        #[serde(rename = "addressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "addressPrefixes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub address_prefixes: Vec<String>,
         #[doc = "Subscriptions for inbound rules"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub subscriptions: Vec<serde_json::Value>,
         #[doc = "NetworkSecurityPerimeters for inbound rules"]
-        #[serde(rename = "networkSecurityPerimeters", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "networkSecurityPerimeters",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub network_security_perimeters: Vec<NetworkSecurityPerimeter>,
         #[doc = "FQDN for outbound rules"]
-        #[serde(rename = "fullyQualifiedDomainNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "fullyQualifiedDomainNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub fully_qualified_domain_names: Vec<String>,
     }
     impl Properties {
@@ -1666,7 +1777,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Event Hub operations supported by the Microsoft.EventHub resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1716,7 +1831,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "A collection of private endpoint connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "A link for the next page of private endpoint connection resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1827,10 +1946,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1842,7 +1971,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "A link for the next page of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2110,7 +2243,11 @@ pub mod schema_group {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SchemaGroupListResult {
     #[doc = "Result of the List SchemaGroups operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SchemaGroup>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Schema Groups."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/extendedlocation/src/package_2021_03_15_preview/models.rs b/services/mgmt/extendedlocation/src/package_2021_03_15_preview/models.rs
index 311cc62d22..75dc4692cf 100644
--- a/services/mgmt/extendedlocation/src/package_2021_03_15_preview/models.rs
+++ b/services/mgmt/extendedlocation/src/package_2021_03_15_preview/models.rs
@@ -30,7 +30,12 @@ pub struct EnabledResourceTypeProperties {
     #[serde(rename = "extensionType", default, skip_serializing_if = "Option::is_none")]
     pub extension_type: Option<String>,
     #[doc = "Metadata of the Resource Type"]
-    #[serde(rename = "typesMetadata", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "typesMetadata",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub types_metadata: Vec<serde_json::Value>,
 }
 impl EnabledResourceTypeProperties {
@@ -45,7 +50,11 @@ pub struct EnabledResourceTypesListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of EnabledResourceTypes available for a customLocation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnabledResourceType>,
 }
 impl azure_core::Continuable for EnabledResourceTypesListResult {
@@ -87,10 +96,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -193,7 +211,11 @@ pub struct CustomLocationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Custom Locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomLocation>,
 }
 impl azure_core::Continuable for CustomLocationListResult {
@@ -276,7 +298,12 @@ pub struct CustomLocationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub authentication: Option<custom_location_properties::Authentication>,
     #[doc = "Contains the reference to the add-on that contains charts to deploy CRDs and operators."]
-    #[serde(rename = "clusterExtensionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterExtensionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_extension_ids: Vec<String>,
     #[doc = "Display name for the Custom Locations location."]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/extendedlocation/src/package_2021_08_15/models.rs b/services/mgmt/extendedlocation/src/package_2021_08_15/models.rs
index 94c6865d12..31108ef9ec 100644
--- a/services/mgmt/extendedlocation/src/package_2021_08_15/models.rs
+++ b/services/mgmt/extendedlocation/src/package_2021_08_15/models.rs
@@ -30,7 +30,12 @@ pub struct EnabledResourceTypeProperties {
     #[serde(rename = "extensionType", default, skip_serializing_if = "Option::is_none")]
     pub extension_type: Option<String>,
     #[doc = "Metadata of the Resource Type"]
-    #[serde(rename = "typesMetadata", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "typesMetadata",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub types_metadata: Vec<serde_json::Value>,
 }
 impl EnabledResourceTypeProperties {
@@ -45,7 +50,11 @@ pub struct EnabledResourceTypesListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of EnabledResourceTypes available for a customLocation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnabledResourceType>,
 }
 impl azure_core::Continuable for EnabledResourceTypesListResult {
@@ -87,10 +96,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -255,7 +273,11 @@ pub struct CustomLocationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Custom Locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomLocation>,
 }
 impl azure_core::Continuable for CustomLocationListResult {
@@ -338,7 +360,12 @@ pub struct CustomLocationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub authentication: Option<custom_location_properties::Authentication>,
     #[doc = "Contains the reference to the add-on that contains charts to deploy CRDs and operators."]
-    #[serde(rename = "clusterExtensionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterExtensionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_extension_ids: Vec<String>,
     #[doc = "Display name for the Custom Locations location."]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/extendedlocation/src/package_2021_08_31_preview/models.rs b/services/mgmt/extendedlocation/src/package_2021_08_31_preview/models.rs
index 4395f9d83f..6f3911737e 100644
--- a/services/mgmt/extendedlocation/src/package_2021_08_31_preview/models.rs
+++ b/services/mgmt/extendedlocation/src/package_2021_08_31_preview/models.rs
@@ -30,7 +30,12 @@ pub struct EnabledResourceTypeProperties {
     #[serde(rename = "extensionType", default, skip_serializing_if = "Option::is_none")]
     pub extension_type: Option<String>,
     #[doc = "Metadata of the Resource Type"]
-    #[serde(rename = "typesMetadata", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "typesMetadata",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub types_metadata: Vec<serde_json::Value>,
 }
 impl EnabledResourceTypeProperties {
@@ -45,7 +50,11 @@ pub struct EnabledResourceTypesListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of EnabledResourceTypes available for a customLocation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnabledResourceType>,
 }
 impl azure_core::Continuable for EnabledResourceTypesListResult {
@@ -87,10 +96,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -282,7 +300,11 @@ pub struct CustomLocationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Custom Locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomLocation>,
 }
 impl azure_core::Continuable for CustomLocationListResult {
@@ -365,7 +387,12 @@ pub struct CustomLocationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub authentication: Option<custom_location_properties::Authentication>,
     #[doc = "Contains the reference to the add-on that contains charts to deploy CRDs and operators."]
-    #[serde(rename = "clusterExtensionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterExtensionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_extension_ids: Vec<String>,
     #[doc = "Display name for the Custom Locations location."]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
@@ -452,7 +479,11 @@ pub struct MatchExpressionsProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<String>,
     #[doc = "The label value"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl MatchExpressionsProperties {
@@ -521,7 +552,11 @@ pub struct ResourceSyncRuleListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Resource Sync Rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceSyncRule>,
 }
 impl azure_core::Continuable for ResourceSyncRuleListResult {
diff --git a/services/mgmt/fluidrelay/src/package_2022_02_15/models.rs b/services/mgmt/fluidrelay/src/package_2022_02_15/models.rs
index bd5c71f68a..d8f322edce 100644
--- a/services/mgmt/fluidrelay/src/package_2022_02_15/models.rs
+++ b/services/mgmt/fluidrelay/src/package_2022_02_15/models.rs
@@ -31,10 +31,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -81,7 +90,11 @@ impl FluidRelayContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FluidRelayContainerList {
     #[doc = "A sequence of FluidRelay containers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FluidRelayContainer>,
     #[doc = "A link to the next page of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -162,10 +175,20 @@ pub mod fluid_relay_container_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FluidRelayEndpoints {
     #[doc = "The Fluid Relay Orderer endpoints."]
-    #[serde(rename = "ordererEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ordererEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub orderer_endpoints: Vec<String>,
     #[doc = "The Fluid Relay storage endpoints."]
-    #[serde(rename = "storageEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_endpoints: Vec<String>,
 }
 impl FluidRelayEndpoints {
@@ -369,7 +392,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of FluidRelay operations supported by the Microsoft.FluidRelay provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/fluidrelay/src/package_2022_04_21/models.rs b/services/mgmt/fluidrelay/src/package_2022_04_21/models.rs
index e1d55f517f..4844e30de6 100644
--- a/services/mgmt/fluidrelay/src/package_2022_04_21/models.rs
+++ b/services/mgmt/fluidrelay/src/package_2022_04_21/models.rs
@@ -85,10 +85,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -135,7 +144,11 @@ impl FluidRelayContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FluidRelayContainerList {
     #[doc = "A sequence of FluidRelay containers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FluidRelayContainer>,
     #[doc = "A link to the next page of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -216,10 +229,20 @@ pub mod fluid_relay_container_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FluidRelayEndpoints {
     #[doc = "The Fluid Relay Orderer endpoints."]
-    #[serde(rename = "ordererEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ordererEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub orderer_endpoints: Vec<String>,
     #[doc = "The Fluid Relay storage endpoints."]
-    #[serde(rename = "storageEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_endpoints: Vec<String>,
 }
 impl FluidRelayEndpoints {
@@ -441,7 +464,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of FluidRelay operations supported by the Microsoft.FluidRelay provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/fluidrelay/src/package_2022_05_11/models.rs b/services/mgmt/fluidrelay/src/package_2022_05_11/models.rs
index 3e1cfac8fb..7baa14a1e2 100644
--- a/services/mgmt/fluidrelay/src/package_2022_05_11/models.rs
+++ b/services/mgmt/fluidrelay/src/package_2022_05_11/models.rs
@@ -85,10 +85,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -135,7 +144,11 @@ impl FluidRelayContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FluidRelayContainerList {
     #[doc = "A sequence of FluidRelay containers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FluidRelayContainer>,
     #[doc = "A link to the next page of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -222,10 +235,20 @@ pub mod fluid_relay_container_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FluidRelayEndpoints {
     #[doc = "The Fluid Relay Orderer endpoints."]
-    #[serde(rename = "ordererEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ordererEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub orderer_endpoints: Vec<String>,
     #[doc = "The Fluid Relay storage endpoints."]
-    #[serde(rename = "storageEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_endpoints: Vec<String>,
 }
 impl FluidRelayEndpoints {
@@ -447,7 +470,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of FluidRelay operations supported by the Microsoft.FluidRelay provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/fluidrelay/src/package_2022_05_26/models.rs b/services/mgmt/fluidrelay/src/package_2022_05_26/models.rs
index fb0adc6cb6..4eca150233 100644
--- a/services/mgmt/fluidrelay/src/package_2022_05_26/models.rs
+++ b/services/mgmt/fluidrelay/src/package_2022_05_26/models.rs
@@ -85,10 +85,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -135,7 +144,11 @@ impl FluidRelayContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FluidRelayContainerList {
     #[doc = "A sequence of FluidRelay containers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FluidRelayContainer>,
     #[doc = "A link to the next page of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -222,13 +235,28 @@ pub mod fluid_relay_container_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FluidRelayEndpoints {
     #[doc = "The Fluid Relay Orderer endpoints."]
-    #[serde(rename = "ordererEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ordererEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub orderer_endpoints: Vec<String>,
     #[doc = "The Fluid Relay storage endpoints."]
-    #[serde(rename = "storageEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_endpoints: Vec<String>,
     #[doc = "The Fluid Relay service endpoints."]
-    #[serde(rename = "serviceEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_endpoints: Vec<String>,
 }
 impl FluidRelayEndpoints {
@@ -492,7 +520,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of FluidRelay operations supported by the Microsoft.FluidRelay provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/fluidrelay/src/package_2022_06_01/models.rs b/services/mgmt/fluidrelay/src/package_2022_06_01/models.rs
index fb0adc6cb6..4eca150233 100644
--- a/services/mgmt/fluidrelay/src/package_2022_06_01/models.rs
+++ b/services/mgmt/fluidrelay/src/package_2022_06_01/models.rs
@@ -85,10 +85,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -135,7 +144,11 @@ impl FluidRelayContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FluidRelayContainerList {
     #[doc = "A sequence of FluidRelay containers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FluidRelayContainer>,
     #[doc = "A link to the next page of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -222,13 +235,28 @@ pub mod fluid_relay_container_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FluidRelayEndpoints {
     #[doc = "The Fluid Relay Orderer endpoints."]
-    #[serde(rename = "ordererEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ordererEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub orderer_endpoints: Vec<String>,
     #[doc = "The Fluid Relay storage endpoints."]
-    #[serde(rename = "storageEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_endpoints: Vec<String>,
     #[doc = "The Fluid Relay service endpoints."]
-    #[serde(rename = "serviceEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_endpoints: Vec<String>,
 }
 impl FluidRelayEndpoints {
@@ -492,7 +520,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of FluidRelay operations supported by the Microsoft.FluidRelay provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/frontdoor/src/package_2020_04/models.rs b/services/mgmt/frontdoor/src/package_2020_04/models.rs
index 330432b3cd..8b803f2847 100644
--- a/services/mgmt/frontdoor/src/package_2020_04/models.rs
+++ b/services/mgmt/frontdoor/src/package_2020_04/models.rs
@@ -246,7 +246,11 @@ impl BackendPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendPoolListResult {
     #[doc = "List of Backend Pools within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackendPool>,
     #[doc = "URL to get the next set of BackendPool objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -274,7 +278,11 @@ impl BackendPoolProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendPoolUpdateParameters {
     #[doc = "The set of backends for this pool"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backends: Vec<Backend>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "loadBalancingSettings", default, skip_serializing_if = "Option::is_none")]
@@ -791,7 +799,11 @@ pub mod custom_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRuleList {
     #[doc = "List of rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<CustomRule>,
 }
 impl CustomRuleList {
@@ -822,7 +834,11 @@ pub struct Error {
     pub message: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetails>,
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
     pub inner_error: Option<String>,
@@ -888,7 +904,11 @@ impl Experiment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExperimentList {
     #[doc = "List of Experiments within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Experiment>,
     #[doc = "URL to get the next set of Experiment objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1184,7 +1204,11 @@ pub mod front_door_certificate_source_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FrontDoorListResult {
     #[doc = "List of Front Doors within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FrontDoor>,
     #[doc = "URL to get the next set of Front Door objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1218,7 +1242,12 @@ pub struct FrontDoorProperties {
     #[serde(rename = "frontdoorId", default, skip_serializing_if = "Option::is_none")]
     pub frontdoor_id: Option<String>,
     #[doc = "Rules Engine Configurations available to routing rules."]
-    #[serde(rename = "rulesEngines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rulesEngines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules_engines: Vec<RulesEngine>,
 }
 impl FrontDoorProperties {
@@ -1233,19 +1262,44 @@ pub struct FrontDoorUpdateParameters {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "Routing rules associated with this Front Door."]
-    #[serde(rename = "routingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "routingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routing_rules: Vec<RoutingRule>,
     #[doc = "Load balancing settings associated with this Front Door instance."]
-    #[serde(rename = "loadBalancingSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_settings: Vec<LoadBalancingSettingsModel>,
     #[doc = "Health probe settings associated with this Front Door instance."]
-    #[serde(rename = "healthProbeSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthProbeSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_probe_settings: Vec<HealthProbeSettingsModel>,
     #[doc = "Backend pools available to routing rules."]
-    #[serde(rename = "backendPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_pools: Vec<BackendPool>,
     #[doc = "Frontend endpoints available to routing rules."]
-    #[serde(rename = "frontendEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_endpoints: Vec<FrontendEndpoint>,
     #[doc = "Settings that apply to all backend pools."]
     #[serde(rename = "backendPoolsSettings", default, skip_serializing_if = "Option::is_none")]
@@ -1551,7 +1605,11 @@ pub mod frontend_endpoint_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FrontendEndpointsListResult {
     #[doc = "List of Frontend endpoints within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FrontendEndpoint>,
     #[doc = "URL to get the next set of frontend endpoints if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1636,7 +1694,11 @@ pub mod header_action {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthProbeSettingsListResult {
     #[doc = "List of HealthProbeSettings within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HealthProbeSettingsModel>,
     #[doc = "URL to get the next set of HealthProbeSettings objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1939,7 +2001,12 @@ pub struct LatencyScorecardProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub country: Option<String>,
     #[doc = "The latency metrics of the Latency Scorecard"]
-    #[serde(rename = "latencyMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "latencyMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub latency_metrics: Vec<LatencyMetric>,
 }
 impl LatencyScorecardProperties {
@@ -1951,7 +2018,11 @@ impl LatencyScorecardProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancingSettingsListResult {
     #[doc = "List of Backend Pools within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoadBalancingSettingsModel>,
     #[doc = "URL to get the next set of LoadBalancingSettings objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2193,7 +2264,11 @@ pub struct ManagedRuleGroupDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of rules within the managed rule group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleDefinition>,
 }
 impl ManagedRuleGroupDefinition {
@@ -2208,10 +2283,18 @@ pub struct ManagedRuleGroupOverride {
     #[serde(rename = "ruleGroupName")]
     pub rule_group_name: String,
     #[doc = "Describes the exclusions that are applied to all rules in the group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ManagedRuleExclusion>,
     #[doc = "List of rules that will be disabled. If none specified, all rules in the group will be disabled."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleOverride>,
 }
 impl ManagedRuleGroupOverride {
@@ -2236,7 +2319,11 @@ pub struct ManagedRuleOverride {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<ActionType>,
     #[doc = "Describes the exclusions that are applied to this specific rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ManagedRuleExclusion>,
 }
 impl ManagedRuleOverride {
@@ -2259,10 +2346,19 @@ pub struct ManagedRuleSet {
     #[serde(rename = "ruleSetVersion")]
     pub rule_set_version: String,
     #[doc = "Describes the exclusions that are applied to all rules in the set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ManagedRuleExclusion>,
     #[doc = "Defines the rule group overrides to apply to the rule set."]
-    #[serde(rename = "ruleGroupOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroupOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_group_overrides: Vec<ManagedRuleGroupOverride>,
 }
 impl ManagedRuleSet {
@@ -2293,7 +2389,11 @@ impl ManagedRuleSetDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetDefinitionList {
     #[doc = "List of managed rule set definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedRuleSetDefinition>,
     #[doc = "URL to retrieve next set of managed rule set definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2326,7 +2426,12 @@ pub struct ManagedRuleSetDefinitionProperties {
     #[serde(rename = "ruleSetVersion", default, skip_serializing_if = "Option::is_none")]
     pub rule_set_version: Option<String>,
     #[doc = "Rule groups of the managed rule set."]
-    #[serde(rename = "ruleGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_groups: Vec<ManagedRuleGroupDefinition>,
 }
 impl ManagedRuleSetDefinitionProperties {
@@ -2338,7 +2443,12 @@ impl ManagedRuleSetDefinitionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetList {
     #[doc = "List of rule sets."]
-    #[serde(rename = "managedRuleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedRuleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_rule_sets: Vec<ManagedRuleSet>,
 }
 impl ManagedRuleSetList {
@@ -2364,7 +2474,11 @@ pub struct MatchCondition {
     #[serde(rename = "matchValue")]
     pub match_value: Vec<String>,
     #[doc = "List of transforms."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<TransformType>,
 }
 impl MatchCondition {
@@ -2658,7 +2772,11 @@ impl PreconfiguredEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PreconfiguredEndpointList {
     #[doc = "List of PreconfiguredEndpoints supported by NetworkExperiment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PreconfiguredEndpoint>,
     #[doc = "URL to get the next set of PreconfiguredEndpoints if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2767,7 +2885,11 @@ impl Profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileList {
     #[doc = "List of Profiles within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Profile>,
     #[doc = "URL to get the next set of Profile objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3161,7 +3283,11 @@ impl RoutingRuleLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingRuleListResult {
     #[doc = "List of Routing Rules within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoutingRule>,
     #[doc = "URL to get the next set of RoutingRule objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3189,13 +3315,28 @@ impl RoutingRuleProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingRuleUpdateParameters {
     #[doc = "Frontend endpoints associated with this rule"]
-    #[serde(rename = "frontendEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_endpoints: Vec<SubResource>,
     #[doc = "Protocol schemes to match for this rule"]
-    #[serde(rename = "acceptedProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "acceptedProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accepted_protocols: Vec<String>,
     #[doc = "The route patterns of the rule."]
-    #[serde(rename = "patternsToMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternsToMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub patterns_to_match: Vec<String>,
     #[doc = "Whether to enable use of this rule. Permitted values are 'Enabled' or 'Disabled'"]
     #[serde(rename = "enabledState", default, skip_serializing_if = "Option::is_none")]
@@ -3292,10 +3433,20 @@ impl RulesEngine {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RulesEngineAction {
     #[doc = "A list of header actions to apply from the request from AFD to the origin."]
-    #[serde(rename = "requestHeaderActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestHeaderActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_header_actions: Vec<HeaderAction>,
     #[doc = "A list of header actions to apply from the response from AFD to the client."]
-    #[serde(rename = "responseHeaderActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "responseHeaderActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub response_header_actions: Vec<HeaderAction>,
     #[doc = "Base class for all types of Route."]
     #[serde(rename = "routeConfigurationOverride", default, skip_serializing_if = "Option::is_none")]
@@ -3310,7 +3461,11 @@ impl RulesEngineAction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RulesEngineListResult {
     #[doc = "List of rulesEngines within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RulesEngine>,
     #[doc = "URL to get the next set of RulesEngine objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3346,7 +3501,11 @@ pub struct RulesEngineMatchCondition {
     #[serde(rename = "rulesEngineMatchValue")]
     pub rules_engine_match_value: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RulesEngineMatchCondition {
@@ -3506,7 +3665,12 @@ pub struct RulesEngineRule {
     #[doc = "One or more actions that will execute, modifying the request and/or response."]
     pub action: RulesEngineAction,
     #[doc = "A list of match conditions that must meet in order for the actions of this rule to run. Having no match conditions means the actions will always run."]
-    #[serde(rename = "matchConditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchConditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_conditions: Vec<RulesEngineMatchCondition>,
     #[doc = "If this rule is a match should the rules engine continue running the remaining rules or stop. If not present, defaults to Continue."]
     #[serde(rename = "matchProcessingBehavior", default, skip_serializing_if = "Option::is_none")]
@@ -3567,7 +3731,11 @@ pub mod rules_engine_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RulesEngineUpdateParameters {
     #[doc = "A list of rules that define a particular Rules Engine Configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<RulesEngineRule>,
 }
 impl RulesEngineUpdateParameters {
@@ -3650,7 +3818,12 @@ pub struct TimeseriesProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub country: Option<String>,
     #[doc = "The set of data points for the timeseries"]
-    #[serde(rename = "timeseriesData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeseriesData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub timeseries_data: Vec<TimeseriesDataPoint>,
 }
 impl TimeseriesProperties {
@@ -3835,7 +4008,11 @@ impl WebApplicationFirewallPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebApplicationFirewallPolicyList {
     #[doc = "List of WebApplicationFirewallPolicies within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WebApplicationFirewallPolicy>,
     #[doc = "URL to get the next set of WebApplicationFirewallPolicy objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3865,10 +4042,20 @@ pub struct WebApplicationFirewallPolicyProperties {
     #[serde(rename = "managedRules", default, skip_serializing_if = "Option::is_none")]
     pub managed_rules: Option<ManagedRuleSetList>,
     #[doc = "Describes Frontend Endpoints associated with this Web Application Firewall policy."]
-    #[serde(rename = "frontendEndpointLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendEndpointLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_endpoint_links: Vec<FrontendEndpointLink>,
     #[doc = "Describes Routing Rules associated with this Web Application Firewall policy."]
-    #[serde(rename = "routingRuleLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "routingRuleLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routing_rule_links: Vec<RoutingRuleLink>,
     #[doc = "Provisioning state of the policy."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/frontdoor/src/package_2020_05/models.rs b/services/mgmt/frontdoor/src/package_2020_05/models.rs
index 504a2d9bf5..29ab692a00 100644
--- a/services/mgmt/frontdoor/src/package_2020_05/models.rs
+++ b/services/mgmt/frontdoor/src/package_2020_05/models.rs
@@ -252,7 +252,11 @@ impl BackendPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendPoolListResult {
     #[doc = "List of Backend Pools within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackendPool>,
     #[doc = "URL to get the next set of BackendPool objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -280,7 +284,11 @@ impl BackendPoolProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendPoolUpdateParameters {
     #[doc = "The set of backends for this pool"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backends: Vec<Backend>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "loadBalancingSettings", default, skip_serializing_if = "Option::is_none")]
@@ -797,7 +805,11 @@ pub mod custom_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRuleList {
     #[doc = "List of rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<CustomRule>,
 }
 impl CustomRuleList {
@@ -828,7 +840,11 @@ pub struct Error {
     pub message: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetails>,
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
     pub inner_error: Option<String>,
@@ -894,7 +910,11 @@ impl Experiment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExperimentList {
     #[doc = "List of Experiments within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Experiment>,
     #[doc = "URL to get the next set of Experiment objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1190,7 +1210,11 @@ pub mod front_door_certificate_source_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FrontDoorListResult {
     #[doc = "List of Front Doors within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FrontDoor>,
     #[doc = "URL to get the next set of Front Door objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1224,7 +1248,12 @@ pub struct FrontDoorProperties {
     #[serde(rename = "frontdoorId", default, skip_serializing_if = "Option::is_none")]
     pub frontdoor_id: Option<String>,
     #[doc = "Rules Engine Configurations available to routing rules."]
-    #[serde(rename = "rulesEngines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rulesEngines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules_engines: Vec<RulesEngine>,
 }
 impl FrontDoorProperties {
@@ -1239,19 +1268,44 @@ pub struct FrontDoorUpdateParameters {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "Routing rules associated with this Front Door."]
-    #[serde(rename = "routingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "routingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routing_rules: Vec<RoutingRule>,
     #[doc = "Load balancing settings associated with this Front Door instance."]
-    #[serde(rename = "loadBalancingSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_settings: Vec<LoadBalancingSettingsModel>,
     #[doc = "Health probe settings associated with this Front Door instance."]
-    #[serde(rename = "healthProbeSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthProbeSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_probe_settings: Vec<HealthProbeSettingsModel>,
     #[doc = "Backend pools available to routing rules."]
-    #[serde(rename = "backendPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_pools: Vec<BackendPool>,
     #[doc = "Frontend endpoints available to routing rules."]
-    #[serde(rename = "frontendEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_endpoints: Vec<FrontendEndpoint>,
     #[doc = "Settings that apply to all backend pools."]
     #[serde(rename = "backendPoolsSettings", default, skip_serializing_if = "Option::is_none")]
@@ -1557,7 +1611,11 @@ pub mod frontend_endpoint_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FrontendEndpointsListResult {
     #[doc = "List of Frontend endpoints within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FrontendEndpoint>,
     #[doc = "URL to get the next set of frontend endpoints if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1642,7 +1700,11 @@ pub mod header_action {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthProbeSettingsListResult {
     #[doc = "List of HealthProbeSettings within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HealthProbeSettingsModel>,
     #[doc = "URL to get the next set of HealthProbeSettings objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1945,7 +2007,12 @@ pub struct LatencyScorecardProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub country: Option<String>,
     #[doc = "The latency metrics of the Latency Scorecard"]
-    #[serde(rename = "latencyMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "latencyMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub latency_metrics: Vec<LatencyMetric>,
 }
 impl LatencyScorecardProperties {
@@ -1957,7 +2024,11 @@ impl LatencyScorecardProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancingSettingsListResult {
     #[doc = "List of Backend Pools within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoadBalancingSettingsModel>,
     #[doc = "URL to get the next set of LoadBalancingSettings objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2199,7 +2270,11 @@ pub struct ManagedRuleGroupDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of rules within the managed rule group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleDefinition>,
 }
 impl ManagedRuleGroupDefinition {
@@ -2214,10 +2289,18 @@ pub struct ManagedRuleGroupOverride {
     #[serde(rename = "ruleGroupName")]
     pub rule_group_name: String,
     #[doc = "Describes the exclusions that are applied to all rules in the group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ManagedRuleExclusion>,
     #[doc = "List of rules that will be disabled. If none specified, all rules in the group will be disabled."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleOverride>,
 }
 impl ManagedRuleGroupOverride {
@@ -2242,7 +2325,11 @@ pub struct ManagedRuleOverride {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<ActionType>,
     #[doc = "Describes the exclusions that are applied to this specific rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ManagedRuleExclusion>,
 }
 impl ManagedRuleOverride {
@@ -2265,10 +2352,19 @@ pub struct ManagedRuleSet {
     #[serde(rename = "ruleSetVersion")]
     pub rule_set_version: String,
     #[doc = "Describes the exclusions that are applied to all rules in the set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ManagedRuleExclusion>,
     #[doc = "Defines the rule group overrides to apply to the rule set."]
-    #[serde(rename = "ruleGroupOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroupOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_group_overrides: Vec<ManagedRuleGroupOverride>,
 }
 impl ManagedRuleSet {
@@ -2299,7 +2395,11 @@ impl ManagedRuleSetDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetDefinitionList {
     #[doc = "List of managed rule set definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedRuleSetDefinition>,
     #[doc = "URL to retrieve next set of managed rule set definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2332,7 +2432,12 @@ pub struct ManagedRuleSetDefinitionProperties {
     #[serde(rename = "ruleSetVersion", default, skip_serializing_if = "Option::is_none")]
     pub rule_set_version: Option<String>,
     #[doc = "Rule groups of the managed rule set."]
-    #[serde(rename = "ruleGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_groups: Vec<ManagedRuleGroupDefinition>,
 }
 impl ManagedRuleSetDefinitionProperties {
@@ -2344,7 +2449,12 @@ impl ManagedRuleSetDefinitionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetList {
     #[doc = "List of rule sets."]
-    #[serde(rename = "managedRuleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedRuleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_rule_sets: Vec<ManagedRuleSet>,
 }
 impl ManagedRuleSetList {
@@ -2370,7 +2480,11 @@ pub struct MatchCondition {
     #[serde(rename = "matchValue")]
     pub match_value: Vec<String>,
     #[doc = "List of transforms."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<TransformType>,
 }
 impl MatchCondition {
@@ -2664,7 +2778,11 @@ impl PreconfiguredEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PreconfiguredEndpointList {
     #[doc = "List of PreconfiguredEndpoints supported by NetworkExperiment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PreconfiguredEndpoint>,
     #[doc = "URL to get the next set of PreconfiguredEndpoints if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2773,7 +2891,11 @@ impl Profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileList {
     #[doc = "List of Profiles within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Profile>,
     #[doc = "URL to get the next set of Profile objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3167,7 +3289,11 @@ impl RoutingRuleLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingRuleListResult {
     #[doc = "List of Routing Rules within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoutingRule>,
     #[doc = "URL to get the next set of RoutingRule objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3195,13 +3321,28 @@ impl RoutingRuleProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingRuleUpdateParameters {
     #[doc = "Frontend endpoints associated with this rule"]
-    #[serde(rename = "frontendEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_endpoints: Vec<SubResource>,
     #[doc = "Protocol schemes to match for this rule"]
-    #[serde(rename = "acceptedProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "acceptedProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accepted_protocols: Vec<String>,
     #[doc = "The route patterns of the rule."]
-    #[serde(rename = "patternsToMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternsToMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub patterns_to_match: Vec<String>,
     #[doc = "Whether to enable use of this rule. Permitted values are 'Enabled' or 'Disabled'"]
     #[serde(rename = "enabledState", default, skip_serializing_if = "Option::is_none")]
@@ -3298,10 +3439,20 @@ impl RulesEngine {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RulesEngineAction {
     #[doc = "A list of header actions to apply from the request from AFD to the origin."]
-    #[serde(rename = "requestHeaderActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestHeaderActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_header_actions: Vec<HeaderAction>,
     #[doc = "A list of header actions to apply from the response from AFD to the client."]
-    #[serde(rename = "responseHeaderActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "responseHeaderActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub response_header_actions: Vec<HeaderAction>,
     #[doc = "Base class for all types of Route."]
     #[serde(rename = "routeConfigurationOverride", default, skip_serializing_if = "Option::is_none")]
@@ -3316,7 +3467,11 @@ impl RulesEngineAction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RulesEngineListResult {
     #[doc = "List of rulesEngines within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RulesEngine>,
     #[doc = "URL to get the next set of RulesEngine objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3352,7 +3507,11 @@ pub struct RulesEngineMatchCondition {
     #[serde(rename = "rulesEngineMatchValue")]
     pub rules_engine_match_value: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RulesEngineMatchCondition {
@@ -3512,7 +3671,12 @@ pub struct RulesEngineRule {
     #[doc = "One or more actions that will execute, modifying the request and/or response."]
     pub action: RulesEngineAction,
     #[doc = "A list of match conditions that must meet in order for the actions of this rule to run. Having no match conditions means the actions will always run."]
-    #[serde(rename = "matchConditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchConditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_conditions: Vec<RulesEngineMatchCondition>,
     #[doc = "If this rule is a match should the rules engine continue running the remaining rules or stop. If not present, defaults to Continue."]
     #[serde(rename = "matchProcessingBehavior", default, skip_serializing_if = "Option::is_none")]
@@ -3573,7 +3737,11 @@ pub mod rules_engine_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RulesEngineUpdateParameters {
     #[doc = "A list of rules that define a particular Rules Engine Configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<RulesEngineRule>,
 }
 impl RulesEngineUpdateParameters {
@@ -3656,7 +3824,12 @@ pub struct TimeseriesProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub country: Option<String>,
     #[doc = "The set of data points for the timeseries"]
-    #[serde(rename = "timeseriesData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeseriesData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub timeseries_data: Vec<TimeseriesDataPoint>,
 }
 impl TimeseriesProperties {
@@ -3841,7 +4014,11 @@ impl WebApplicationFirewallPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebApplicationFirewallPolicyList {
     #[doc = "List of WebApplicationFirewallPolicies within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WebApplicationFirewallPolicy>,
     #[doc = "URL to get the next set of WebApplicationFirewallPolicy objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3871,10 +4048,20 @@ pub struct WebApplicationFirewallPolicyProperties {
     #[serde(rename = "managedRules", default, skip_serializing_if = "Option::is_none")]
     pub managed_rules: Option<ManagedRuleSetList>,
     #[doc = "Describes Frontend Endpoints associated with this Web Application Firewall policy."]
-    #[serde(rename = "frontendEndpointLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendEndpointLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_endpoint_links: Vec<FrontendEndpointLink>,
     #[doc = "Describes Routing Rules associated with this Web Application Firewall policy."]
-    #[serde(rename = "routingRuleLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "routingRuleLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routing_rule_links: Vec<RoutingRuleLink>,
     #[doc = "Provisioning state of the policy."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/frontdoor/src/package_2020_11/models.rs b/services/mgmt/frontdoor/src/package_2020_11/models.rs
index ff4ec16878..890f914ca2 100644
--- a/services/mgmt/frontdoor/src/package_2020_11/models.rs
+++ b/services/mgmt/frontdoor/src/package_2020_11/models.rs
@@ -252,7 +252,11 @@ impl BackendPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendPoolListResult {
     #[doc = "List of Backend Pools within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackendPool>,
     #[doc = "URL to get the next set of BackendPool objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -280,7 +284,11 @@ impl BackendPoolProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendPoolUpdateParameters {
     #[doc = "The set of backends for this pool"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backends: Vec<Backend>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "loadBalancingSettings", default, skip_serializing_if = "Option::is_none")]
@@ -797,7 +805,11 @@ pub mod custom_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRuleList {
     #[doc = "List of rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<CustomRule>,
 }
 impl CustomRuleList {
@@ -828,7 +840,11 @@ pub struct Error {
     pub message: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetails>,
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
     pub inner_error: Option<String>,
@@ -894,7 +910,11 @@ impl Experiment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExperimentList {
     #[doc = "List of Experiments within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Experiment>,
     #[doc = "URL to get the next set of Experiment objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1190,7 +1210,11 @@ pub mod front_door_certificate_source_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FrontDoorListResult {
     #[doc = "List of Front Doors within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FrontDoor>,
     #[doc = "URL to get the next set of Front Door objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1224,7 +1248,12 @@ pub struct FrontDoorProperties {
     #[serde(rename = "frontdoorId", default, skip_serializing_if = "Option::is_none")]
     pub frontdoor_id: Option<String>,
     #[doc = "Rules Engine Configurations available to routing rules."]
-    #[serde(rename = "rulesEngines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rulesEngines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules_engines: Vec<RulesEngine>,
 }
 impl FrontDoorProperties {
@@ -1239,19 +1268,44 @@ pub struct FrontDoorUpdateParameters {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "Routing rules associated with this Front Door."]
-    #[serde(rename = "routingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "routingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routing_rules: Vec<RoutingRule>,
     #[doc = "Load balancing settings associated with this Front Door instance."]
-    #[serde(rename = "loadBalancingSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_settings: Vec<LoadBalancingSettingsModel>,
     #[doc = "Health probe settings associated with this Front Door instance."]
-    #[serde(rename = "healthProbeSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthProbeSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_probe_settings: Vec<HealthProbeSettingsModel>,
     #[doc = "Backend pools available to routing rules."]
-    #[serde(rename = "backendPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_pools: Vec<BackendPool>,
     #[doc = "Frontend endpoints available to routing rules."]
-    #[serde(rename = "frontendEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_endpoints: Vec<FrontendEndpoint>,
     #[doc = "Settings that apply to all backend pools."]
     #[serde(rename = "backendPoolsSettings", default, skip_serializing_if = "Option::is_none")]
@@ -1557,7 +1611,11 @@ pub mod frontend_endpoint_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FrontendEndpointsListResult {
     #[doc = "List of Frontend endpoints within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FrontendEndpoint>,
     #[doc = "URL to get the next set of frontend endpoints if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1642,7 +1700,11 @@ pub mod header_action {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthProbeSettingsListResult {
     #[doc = "List of HealthProbeSettings within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HealthProbeSettingsModel>,
     #[doc = "URL to get the next set of HealthProbeSettings objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1945,7 +2007,12 @@ pub struct LatencyScorecardProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub country: Option<String>,
     #[doc = "The latency metrics of the Latency Scorecard"]
-    #[serde(rename = "latencyMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "latencyMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub latency_metrics: Vec<LatencyMetric>,
 }
 impl LatencyScorecardProperties {
@@ -1957,7 +2024,11 @@ impl LatencyScorecardProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancingSettingsListResult {
     #[doc = "List of Backend Pools within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoadBalancingSettingsModel>,
     #[doc = "URL to get the next set of LoadBalancingSettings objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2201,7 +2272,11 @@ pub struct ManagedRuleGroupDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of rules within the managed rule group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleDefinition>,
 }
 impl ManagedRuleGroupDefinition {
@@ -2216,10 +2291,18 @@ pub struct ManagedRuleGroupOverride {
     #[serde(rename = "ruleGroupName")]
     pub rule_group_name: String,
     #[doc = "Describes the exclusions that are applied to all rules in the group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ManagedRuleExclusion>,
     #[doc = "List of rules that will be disabled. If none specified, all rules in the group will be disabled."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleOverride>,
 }
 impl ManagedRuleGroupOverride {
@@ -2244,7 +2327,11 @@ pub struct ManagedRuleOverride {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<ActionType>,
     #[doc = "Describes the exclusions that are applied to this specific rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ManagedRuleExclusion>,
 }
 impl ManagedRuleOverride {
@@ -2270,10 +2357,19 @@ pub struct ManagedRuleSet {
     #[serde(rename = "ruleSetAction", default, skip_serializing_if = "Option::is_none")]
     pub rule_set_action: Option<ManagedRuleSetActionType>,
     #[doc = "Describes the exclusions that are applied to all rules in the set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ManagedRuleExclusion>,
     #[doc = "Defines the rule group overrides to apply to the rule set."]
-    #[serde(rename = "ruleGroupOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroupOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_group_overrides: Vec<ManagedRuleGroupOverride>,
 }
 impl ManagedRuleSet {
@@ -2344,7 +2440,11 @@ impl ManagedRuleSetDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetDefinitionList {
     #[doc = "List of managed rule set definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedRuleSetDefinition>,
     #[doc = "URL to retrieve next set of managed rule set definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2377,7 +2477,12 @@ pub struct ManagedRuleSetDefinitionProperties {
     #[serde(rename = "ruleSetVersion", default, skip_serializing_if = "Option::is_none")]
     pub rule_set_version: Option<String>,
     #[doc = "Rule groups of the managed rule set."]
-    #[serde(rename = "ruleGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_groups: Vec<ManagedRuleGroupDefinition>,
 }
 impl ManagedRuleSetDefinitionProperties {
@@ -2389,7 +2494,12 @@ impl ManagedRuleSetDefinitionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetList {
     #[doc = "List of rule sets."]
-    #[serde(rename = "managedRuleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedRuleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_rule_sets: Vec<ManagedRuleSet>,
 }
 impl ManagedRuleSetList {
@@ -2415,7 +2525,11 @@ pub struct MatchCondition {
     #[serde(rename = "matchValue")]
     pub match_value: Vec<String>,
     #[doc = "List of transforms."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<TransformType>,
 }
 impl MatchCondition {
@@ -2749,7 +2863,11 @@ impl PreconfiguredEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PreconfiguredEndpointList {
     #[doc = "List of PreconfiguredEndpoints supported by NetworkExperiment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PreconfiguredEndpoint>,
     #[doc = "URL to get the next set of PreconfiguredEndpoints if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2858,7 +2976,11 @@ impl Profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileList {
     #[doc = "List of Profiles within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Profile>,
     #[doc = "URL to get the next set of Profile objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3252,7 +3374,11 @@ impl RoutingRuleLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingRuleListResult {
     #[doc = "List of Routing Rules within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoutingRule>,
     #[doc = "URL to get the next set of RoutingRule objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3280,13 +3406,28 @@ impl RoutingRuleProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingRuleUpdateParameters {
     #[doc = "Frontend endpoints associated with this rule"]
-    #[serde(rename = "frontendEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_endpoints: Vec<SubResource>,
     #[doc = "Protocol schemes to match for this rule"]
-    #[serde(rename = "acceptedProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "acceptedProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accepted_protocols: Vec<String>,
     #[doc = "The route patterns of the rule."]
-    #[serde(rename = "patternsToMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternsToMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub patterns_to_match: Vec<String>,
     #[doc = "Whether to enable use of this rule. Permitted values are 'Enabled' or 'Disabled'"]
     #[serde(rename = "enabledState", default, skip_serializing_if = "Option::is_none")]
@@ -3383,10 +3524,20 @@ impl RulesEngine {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RulesEngineAction {
     #[doc = "A list of header actions to apply from the request from AFD to the origin."]
-    #[serde(rename = "requestHeaderActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestHeaderActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_header_actions: Vec<HeaderAction>,
     #[doc = "A list of header actions to apply from the response from AFD to the client."]
-    #[serde(rename = "responseHeaderActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "responseHeaderActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub response_header_actions: Vec<HeaderAction>,
     #[doc = "Base class for all types of Route."]
     #[serde(rename = "routeConfigurationOverride", default, skip_serializing_if = "Option::is_none")]
@@ -3401,7 +3552,11 @@ impl RulesEngineAction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RulesEngineListResult {
     #[doc = "List of rulesEngines within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RulesEngine>,
     #[doc = "URL to get the next set of RulesEngine objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3437,7 +3592,11 @@ pub struct RulesEngineMatchCondition {
     #[serde(rename = "rulesEngineMatchValue")]
     pub rules_engine_match_value: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RulesEngineMatchCondition {
@@ -3597,7 +3756,12 @@ pub struct RulesEngineRule {
     #[doc = "One or more actions that will execute, modifying the request and/or response."]
     pub action: RulesEngineAction,
     #[doc = "A list of match conditions that must meet in order for the actions of this rule to run. Having no match conditions means the actions will always run."]
-    #[serde(rename = "matchConditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchConditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_conditions: Vec<RulesEngineMatchCondition>,
     #[doc = "If this rule is a match should the rules engine continue running the remaining rules or stop. If not present, defaults to Continue."]
     #[serde(rename = "matchProcessingBehavior", default, skip_serializing_if = "Option::is_none")]
@@ -3658,7 +3822,11 @@ pub mod rules_engine_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RulesEngineUpdateParameters {
     #[doc = "A list of rules that define a particular Rules Engine Configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<RulesEngineRule>,
 }
 impl RulesEngineUpdateParameters {
@@ -3810,7 +3978,12 @@ pub struct TimeseriesProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub country: Option<String>,
     #[doc = "The set of data points for the timeseries"]
-    #[serde(rename = "timeseriesData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeseriesData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub timeseries_data: Vec<TimeseriesDataPoint>,
 }
 impl TimeseriesProperties {
@@ -3998,7 +4171,11 @@ impl WebApplicationFirewallPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebApplicationFirewallPolicyList {
     #[doc = "List of WebApplicationFirewallPolicies within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WebApplicationFirewallPolicy>,
     #[doc = "URL to get the next set of WebApplicationFirewallPolicy objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4028,13 +4205,28 @@ pub struct WebApplicationFirewallPolicyProperties {
     #[serde(rename = "managedRules", default, skip_serializing_if = "Option::is_none")]
     pub managed_rules: Option<ManagedRuleSetList>,
     #[doc = "Describes Frontend Endpoints associated with this Web Application Firewall policy."]
-    #[serde(rename = "frontendEndpointLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendEndpointLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_endpoint_links: Vec<FrontendEndpointLink>,
     #[doc = "Describes Routing Rules associated with this Web Application Firewall policy."]
-    #[serde(rename = "routingRuleLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "routingRuleLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routing_rule_links: Vec<RoutingRuleLink>,
     #[doc = "Describes Security Policy associated with this Web Application Firewall policy."]
-    #[serde(rename = "securityPolicyLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityPolicyLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_policy_links: Vec<SecurityPolicyLink>,
     #[doc = "Provisioning state of the policy."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/frontdoor/src/package_2021_06/models.rs b/services/mgmt/frontdoor/src/package_2021_06/models.rs
index bf6f6cb929..745c647f42 100644
--- a/services/mgmt/frontdoor/src/package_2021_06/models.rs
+++ b/services/mgmt/frontdoor/src/package_2021_06/models.rs
@@ -252,7 +252,11 @@ impl BackendPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendPoolListResult {
     #[doc = "List of Backend Pools within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackendPool>,
     #[doc = "URL to get the next set of BackendPool objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -280,7 +284,11 @@ impl BackendPoolProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendPoolUpdateParameters {
     #[doc = "The set of backends for this pool"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backends: Vec<Backend>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "loadBalancingSettings", default, skip_serializing_if = "Option::is_none")]
@@ -797,7 +805,11 @@ pub mod custom_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRuleList {
     #[doc = "List of rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<CustomRule>,
 }
 impl CustomRuleList {
@@ -828,7 +840,11 @@ pub struct Error {
     pub message: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetails>,
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
     pub inner_error: Option<String>,
@@ -894,7 +910,11 @@ impl Experiment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExperimentList {
     #[doc = "List of Experiments within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Experiment>,
     #[doc = "URL to get the next set of Experiment objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1190,7 +1210,11 @@ pub mod front_door_certificate_source_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FrontDoorListResult {
     #[doc = "List of Front Doors within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FrontDoor>,
     #[doc = "URL to get the next set of Front Door objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1224,7 +1248,12 @@ pub struct FrontDoorProperties {
     #[serde(rename = "frontdoorId", default, skip_serializing_if = "Option::is_none")]
     pub frontdoor_id: Option<String>,
     #[doc = "Rules Engine Configurations available to routing rules."]
-    #[serde(rename = "rulesEngines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rulesEngines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules_engines: Vec<RulesEngine>,
     #[doc = "Key-Value pair representing additional properties for frontdoor."]
     #[serde(rename = "extendedProperties", default, skip_serializing_if = "Option::is_none")]
@@ -1242,19 +1271,44 @@ pub struct FrontDoorUpdateParameters {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "Routing rules associated with this Front Door."]
-    #[serde(rename = "routingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "routingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routing_rules: Vec<RoutingRule>,
     #[doc = "Load balancing settings associated with this Front Door instance."]
-    #[serde(rename = "loadBalancingSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_settings: Vec<LoadBalancingSettingsModel>,
     #[doc = "Health probe settings associated with this Front Door instance."]
-    #[serde(rename = "healthProbeSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthProbeSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_probe_settings: Vec<HealthProbeSettingsModel>,
     #[doc = "Backend pools available to routing rules."]
-    #[serde(rename = "backendPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_pools: Vec<BackendPool>,
     #[doc = "Frontend endpoints available to routing rules."]
-    #[serde(rename = "frontendEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_endpoints: Vec<FrontendEndpoint>,
     #[doc = "Settings that apply to all backend pools."]
     #[serde(rename = "backendPoolsSettings", default, skip_serializing_if = "Option::is_none")]
@@ -1560,7 +1614,11 @@ pub mod frontend_endpoint_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FrontendEndpointsListResult {
     #[doc = "List of Frontend endpoints within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FrontendEndpoint>,
     #[doc = "URL to get the next set of frontend endpoints if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1645,7 +1703,11 @@ pub mod header_action {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthProbeSettingsListResult {
     #[doc = "List of HealthProbeSettings within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HealthProbeSettingsModel>,
     #[doc = "URL to get the next set of HealthProbeSettings objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1948,7 +2010,12 @@ pub struct LatencyScorecardProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub country: Option<String>,
     #[doc = "The latency metrics of the Latency Scorecard"]
-    #[serde(rename = "latencyMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "latencyMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub latency_metrics: Vec<LatencyMetric>,
 }
 impl LatencyScorecardProperties {
@@ -1960,7 +2027,11 @@ impl LatencyScorecardProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancingSettingsListResult {
     #[doc = "List of Backend Pools within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoadBalancingSettingsModel>,
     #[doc = "URL to get the next set of LoadBalancingSettings objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2204,7 +2275,11 @@ pub struct ManagedRuleGroupDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of rules within the managed rule group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleDefinition>,
 }
 impl ManagedRuleGroupDefinition {
@@ -2219,10 +2294,18 @@ pub struct ManagedRuleGroupOverride {
     #[serde(rename = "ruleGroupName")]
     pub rule_group_name: String,
     #[doc = "Describes the exclusions that are applied to all rules in the group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ManagedRuleExclusion>,
     #[doc = "List of rules that will be disabled. If none specified, all rules in the group will be disabled."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleOverride>,
 }
 impl ManagedRuleGroupOverride {
@@ -2247,7 +2330,11 @@ pub struct ManagedRuleOverride {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<ActionType>,
     #[doc = "Describes the exclusions that are applied to this specific rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ManagedRuleExclusion>,
 }
 impl ManagedRuleOverride {
@@ -2273,10 +2360,19 @@ pub struct ManagedRuleSet {
     #[serde(rename = "ruleSetAction", default, skip_serializing_if = "Option::is_none")]
     pub rule_set_action: Option<ManagedRuleSetActionType>,
     #[doc = "Describes the exclusions that are applied to all rules in the set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ManagedRuleExclusion>,
     #[doc = "Defines the rule group overrides to apply to the rule set."]
-    #[serde(rename = "ruleGroupOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroupOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_group_overrides: Vec<ManagedRuleGroupOverride>,
 }
 impl ManagedRuleSet {
@@ -2347,7 +2443,11 @@ impl ManagedRuleSetDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetDefinitionList {
     #[doc = "List of managed rule set definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedRuleSetDefinition>,
     #[doc = "URL to retrieve next set of managed rule set definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2380,7 +2480,12 @@ pub struct ManagedRuleSetDefinitionProperties {
     #[serde(rename = "ruleSetVersion", default, skip_serializing_if = "Option::is_none")]
     pub rule_set_version: Option<String>,
     #[doc = "Rule groups of the managed rule set."]
-    #[serde(rename = "ruleGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_groups: Vec<ManagedRuleGroupDefinition>,
 }
 impl ManagedRuleSetDefinitionProperties {
@@ -2392,7 +2497,12 @@ impl ManagedRuleSetDefinitionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetList {
     #[doc = "List of rule sets."]
-    #[serde(rename = "managedRuleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedRuleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_rule_sets: Vec<ManagedRuleSet>,
 }
 impl ManagedRuleSetList {
@@ -2418,7 +2528,11 @@ pub struct MatchCondition {
     #[serde(rename = "matchValue")]
     pub match_value: Vec<String>,
     #[doc = "List of transforms."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<TransformType>,
 }
 impl MatchCondition {
@@ -2752,7 +2866,11 @@ impl PreconfiguredEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PreconfiguredEndpointList {
     #[doc = "List of PreconfiguredEndpoints supported by NetworkExperiment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PreconfiguredEndpoint>,
     #[doc = "URL to get the next set of PreconfiguredEndpoints if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2861,7 +2979,11 @@ impl Profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileList {
     #[doc = "List of Profiles within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Profile>,
     #[doc = "URL to get the next set of Profile objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3259,7 +3381,11 @@ impl RoutingRuleLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingRuleListResult {
     #[doc = "List of Routing Rules within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoutingRule>,
     #[doc = "URL to get the next set of RoutingRule objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3287,13 +3413,28 @@ impl RoutingRuleProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingRuleUpdateParameters {
     #[doc = "Frontend endpoints associated with this rule"]
-    #[serde(rename = "frontendEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_endpoints: Vec<SubResource>,
     #[doc = "Protocol schemes to match for this rule"]
-    #[serde(rename = "acceptedProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "acceptedProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accepted_protocols: Vec<String>,
     #[doc = "The route patterns of the rule."]
-    #[serde(rename = "patternsToMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternsToMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub patterns_to_match: Vec<String>,
     #[doc = "Whether to enable use of this rule. Permitted values are 'Enabled' or 'Disabled'"]
     #[serde(rename = "enabledState", default, skip_serializing_if = "Option::is_none")]
@@ -3390,10 +3531,20 @@ impl RulesEngine {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RulesEngineAction {
     #[doc = "A list of header actions to apply from the request from AFD to the origin."]
-    #[serde(rename = "requestHeaderActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestHeaderActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_header_actions: Vec<HeaderAction>,
     #[doc = "A list of header actions to apply from the response from AFD to the client."]
-    #[serde(rename = "responseHeaderActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "responseHeaderActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub response_header_actions: Vec<HeaderAction>,
     #[doc = "Base class for all types of Route."]
     #[serde(rename = "routeConfigurationOverride", default, skip_serializing_if = "Option::is_none")]
@@ -3408,7 +3559,11 @@ impl RulesEngineAction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RulesEngineListResult {
     #[doc = "List of rulesEngines within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RulesEngine>,
     #[doc = "URL to get the next set of RulesEngine objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3444,7 +3599,11 @@ pub struct RulesEngineMatchCondition {
     #[serde(rename = "rulesEngineMatchValue")]
     pub rules_engine_match_value: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RulesEngineMatchCondition {
@@ -3604,7 +3763,12 @@ pub struct RulesEngineRule {
     #[doc = "One or more actions that will execute, modifying the request and/or response."]
     pub action: RulesEngineAction,
     #[doc = "A list of match conditions that must meet in order for the actions of this rule to run. Having no match conditions means the actions will always run."]
-    #[serde(rename = "matchConditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchConditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_conditions: Vec<RulesEngineMatchCondition>,
     #[doc = "If this rule is a match should the rules engine continue running the remaining rules or stop. If not present, defaults to Continue."]
     #[serde(rename = "matchProcessingBehavior", default, skip_serializing_if = "Option::is_none")]
@@ -3665,7 +3829,11 @@ pub mod rules_engine_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RulesEngineUpdateParameters {
     #[doc = "A list of rules that define a particular Rules Engine Configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<RulesEngineRule>,
 }
 impl RulesEngineUpdateParameters {
@@ -3817,7 +3985,12 @@ pub struct TimeseriesProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub country: Option<String>,
     #[doc = "The set of data points for the timeseries"]
-    #[serde(rename = "timeseriesData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeseriesData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub timeseries_data: Vec<TimeseriesDataPoint>,
 }
 impl TimeseriesProperties {
@@ -4005,7 +4178,11 @@ impl WebApplicationFirewallPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebApplicationFirewallPolicyList {
     #[doc = "List of WebApplicationFirewallPolicies within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WebApplicationFirewallPolicy>,
     #[doc = "URL to get the next set of WebApplicationFirewallPolicy objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4035,13 +4212,28 @@ pub struct WebApplicationFirewallPolicyProperties {
     #[serde(rename = "managedRules", default, skip_serializing_if = "Option::is_none")]
     pub managed_rules: Option<ManagedRuleSetList>,
     #[doc = "Describes Frontend Endpoints associated with this Web Application Firewall policy."]
-    #[serde(rename = "frontendEndpointLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendEndpointLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_endpoint_links: Vec<FrontendEndpointLink>,
     #[doc = "Describes Routing Rules associated with this Web Application Firewall policy."]
-    #[serde(rename = "routingRuleLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "routingRuleLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routing_rule_links: Vec<RoutingRuleLink>,
     #[doc = "Describes Security Policy associated with this Web Application Firewall policy."]
-    #[serde(rename = "securityPolicyLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityPolicyLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_policy_links: Vec<SecurityPolicyLink>,
     #[doc = "Provisioning state of the policy."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/frontdoor/src/package_2022_05/models.rs b/services/mgmt/frontdoor/src/package_2022_05/models.rs
index 85b0270116..da90779bb9 100644
--- a/services/mgmt/frontdoor/src/package_2022_05/models.rs
+++ b/services/mgmt/frontdoor/src/package_2022_05/models.rs
@@ -252,7 +252,11 @@ impl BackendPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendPoolListResult {
     #[doc = "List of Backend Pools within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackendPool>,
     #[doc = "URL to get the next set of BackendPool objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -280,7 +284,11 @@ impl BackendPoolProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendPoolUpdateParameters {
     #[doc = "The set of backends for this pool"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backends: Vec<Backend>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "loadBalancingSettings", default, skip_serializing_if = "Option::is_none")]
@@ -797,7 +805,11 @@ pub mod custom_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRuleList {
     #[doc = "List of rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<CustomRule>,
 }
 impl CustomRuleList {
@@ -828,7 +840,11 @@ pub struct Error {
     pub message: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetails>,
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
     pub inner_error: Option<String>,
@@ -894,7 +910,11 @@ impl Experiment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExperimentList {
     #[doc = "List of Experiments within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Experiment>,
     #[doc = "URL to get the next set of Experiment objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1190,7 +1210,11 @@ pub mod front_door_certificate_source_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FrontDoorListResult {
     #[doc = "List of Front Doors within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FrontDoor>,
     #[doc = "URL to get the next set of Front Door objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1224,7 +1248,12 @@ pub struct FrontDoorProperties {
     #[serde(rename = "frontdoorId", default, skip_serializing_if = "Option::is_none")]
     pub frontdoor_id: Option<String>,
     #[doc = "Rules Engine Configurations available to routing rules."]
-    #[serde(rename = "rulesEngines", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rulesEngines",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules_engines: Vec<RulesEngine>,
     #[doc = "Key-Value pair representing additional properties for frontdoor."]
     #[serde(rename = "extendedProperties", default, skip_serializing_if = "Option::is_none")]
@@ -1242,19 +1271,44 @@ pub struct FrontDoorUpdateParameters {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "Routing rules associated with this Front Door."]
-    #[serde(rename = "routingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "routingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routing_rules: Vec<RoutingRule>,
     #[doc = "Load balancing settings associated with this Front Door instance."]
-    #[serde(rename = "loadBalancingSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_settings: Vec<LoadBalancingSettingsModel>,
     #[doc = "Health probe settings associated with this Front Door instance."]
-    #[serde(rename = "healthProbeSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthProbeSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_probe_settings: Vec<HealthProbeSettingsModel>,
     #[doc = "Backend pools available to routing rules."]
-    #[serde(rename = "backendPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_pools: Vec<BackendPool>,
     #[doc = "Frontend endpoints available to routing rules."]
-    #[serde(rename = "frontendEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_endpoints: Vec<FrontendEndpoint>,
     #[doc = "Settings that apply to all backend pools."]
     #[serde(rename = "backendPoolsSettings", default, skip_serializing_if = "Option::is_none")]
@@ -1560,7 +1614,11 @@ pub mod frontend_endpoint_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FrontendEndpointsListResult {
     #[doc = "List of Frontend endpoints within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FrontendEndpoint>,
     #[doc = "URL to get the next set of frontend endpoints if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1645,7 +1703,11 @@ pub mod header_action {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthProbeSettingsListResult {
     #[doc = "List of HealthProbeSettings within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HealthProbeSettingsModel>,
     #[doc = "URL to get the next set of HealthProbeSettings objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1948,7 +2010,12 @@ pub struct LatencyScorecardProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub country: Option<String>,
     #[doc = "The latency metrics of the Latency Scorecard"]
-    #[serde(rename = "latencyMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "latencyMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub latency_metrics: Vec<LatencyMetric>,
 }
 impl LatencyScorecardProperties {
@@ -1960,7 +2027,11 @@ impl LatencyScorecardProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancingSettingsListResult {
     #[doc = "List of Backend Pools within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoadBalancingSettingsModel>,
     #[doc = "URL to get the next set of LoadBalancingSettings objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2204,7 +2275,11 @@ pub struct ManagedRuleGroupDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of rules within the managed rule group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleDefinition>,
 }
 impl ManagedRuleGroupDefinition {
@@ -2219,10 +2294,18 @@ pub struct ManagedRuleGroupOverride {
     #[serde(rename = "ruleGroupName")]
     pub rule_group_name: String,
     #[doc = "Describes the exclusions that are applied to all rules in the group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ManagedRuleExclusion>,
     #[doc = "List of rules that will be disabled. If none specified, all rules in the group will be disabled."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleOverride>,
 }
 impl ManagedRuleGroupOverride {
@@ -2247,7 +2330,11 @@ pub struct ManagedRuleOverride {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<ActionType>,
     #[doc = "Describes the exclusions that are applied to this specific rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ManagedRuleExclusion>,
 }
 impl ManagedRuleOverride {
@@ -2273,10 +2360,19 @@ pub struct ManagedRuleSet {
     #[serde(rename = "ruleSetAction", default, skip_serializing_if = "Option::is_none")]
     pub rule_set_action: Option<ManagedRuleSetActionType>,
     #[doc = "Describes the exclusions that are applied to all rules in the set."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ManagedRuleExclusion>,
     #[doc = "Defines the rule group overrides to apply to the rule set."]
-    #[serde(rename = "ruleGroupOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroupOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_group_overrides: Vec<ManagedRuleGroupOverride>,
 }
 impl ManagedRuleSet {
@@ -2347,7 +2443,11 @@ impl ManagedRuleSetDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetDefinitionList {
     #[doc = "List of managed rule set definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedRuleSetDefinition>,
     #[doc = "URL to retrieve next set of managed rule set definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2380,7 +2480,12 @@ pub struct ManagedRuleSetDefinitionProperties {
     #[serde(rename = "ruleSetVersion", default, skip_serializing_if = "Option::is_none")]
     pub rule_set_version: Option<String>,
     #[doc = "Rule groups of the managed rule set."]
-    #[serde(rename = "ruleGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_groups: Vec<ManagedRuleGroupDefinition>,
 }
 impl ManagedRuleSetDefinitionProperties {
@@ -2392,7 +2497,12 @@ impl ManagedRuleSetDefinitionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedRuleSetList {
     #[doc = "List of rule sets."]
-    #[serde(rename = "managedRuleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedRuleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_rule_sets: Vec<ManagedRuleSet>,
 }
 impl ManagedRuleSetList {
@@ -2418,7 +2528,11 @@ pub struct MatchCondition {
     #[serde(rename = "matchValue")]
     pub match_value: Vec<String>,
     #[doc = "List of transforms."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<TransformType>,
 }
 impl MatchCondition {
@@ -2752,7 +2866,11 @@ impl PreconfiguredEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PreconfiguredEndpointList {
     #[doc = "List of PreconfiguredEndpoints supported by NetworkExperiment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PreconfiguredEndpoint>,
     #[doc = "URL to get the next set of PreconfiguredEndpoints if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2861,7 +2979,11 @@ impl Profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileList {
     #[doc = "List of Profiles within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Profile>,
     #[doc = "URL to get the next set of Profile objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3259,7 +3381,11 @@ impl RoutingRuleLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingRuleListResult {
     #[doc = "List of Routing Rules within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoutingRule>,
     #[doc = "URL to get the next set of RoutingRule objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3287,13 +3413,28 @@ impl RoutingRuleProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingRuleUpdateParameters {
     #[doc = "Frontend endpoints associated with this rule"]
-    #[serde(rename = "frontendEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_endpoints: Vec<SubResource>,
     #[doc = "Protocol schemes to match for this rule"]
-    #[serde(rename = "acceptedProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "acceptedProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accepted_protocols: Vec<String>,
     #[doc = "The route patterns of the rule."]
-    #[serde(rename = "patternsToMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternsToMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub patterns_to_match: Vec<String>,
     #[doc = "Whether to enable use of this rule. Permitted values are 'Enabled' or 'Disabled'"]
     #[serde(rename = "enabledState", default, skip_serializing_if = "Option::is_none")]
@@ -3390,10 +3531,20 @@ impl RulesEngine {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RulesEngineAction {
     #[doc = "A list of header actions to apply from the request from AFD to the origin."]
-    #[serde(rename = "requestHeaderActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestHeaderActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_header_actions: Vec<HeaderAction>,
     #[doc = "A list of header actions to apply from the response from AFD to the client."]
-    #[serde(rename = "responseHeaderActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "responseHeaderActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub response_header_actions: Vec<HeaderAction>,
     #[doc = "Base class for all types of Route."]
     #[serde(rename = "routeConfigurationOverride", default, skip_serializing_if = "Option::is_none")]
@@ -3408,7 +3559,11 @@ impl RulesEngineAction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RulesEngineListResult {
     #[doc = "List of rulesEngines within a Front Door."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RulesEngine>,
     #[doc = "URL to get the next set of RulesEngine objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3444,7 +3599,11 @@ pub struct RulesEngineMatchCondition {
     #[serde(rename = "rulesEngineMatchValue")]
     pub rules_engine_match_value: Vec<String>,
     #[doc = "List of transforms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl RulesEngineMatchCondition {
@@ -3604,7 +3763,12 @@ pub struct RulesEngineRule {
     #[doc = "One or more actions that will execute, modifying the request and/or response."]
     pub action: RulesEngineAction,
     #[doc = "A list of match conditions that must meet in order for the actions of this rule to run. Having no match conditions means the actions will always run."]
-    #[serde(rename = "matchConditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "matchConditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub match_conditions: Vec<RulesEngineMatchCondition>,
     #[doc = "If this rule is a match should the rules engine continue running the remaining rules or stop. If not present, defaults to Continue."]
     #[serde(rename = "matchProcessingBehavior", default, skip_serializing_if = "Option::is_none")]
@@ -3665,7 +3829,11 @@ pub mod rules_engine_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RulesEngineUpdateParameters {
     #[doc = "A list of rules that define a particular Rules Engine Configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<RulesEngineRule>,
 }
 impl RulesEngineUpdateParameters {
@@ -3817,7 +3985,12 @@ pub struct TimeseriesProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub country: Option<String>,
     #[doc = "The set of data points for the timeseries"]
-    #[serde(rename = "timeseriesData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeseriesData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub timeseries_data: Vec<TimeseriesDataPoint>,
 }
 impl TimeseriesProperties {
@@ -4005,7 +4178,11 @@ impl WebApplicationFirewallPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebApplicationFirewallPolicyList {
     #[doc = "List of WebApplicationFirewallPolicies within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WebApplicationFirewallPolicy>,
     #[doc = "URL to get the next set of WebApplicationFirewallPolicy objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4035,13 +4212,28 @@ pub struct WebApplicationFirewallPolicyProperties {
     #[serde(rename = "managedRules", default, skip_serializing_if = "Option::is_none")]
     pub managed_rules: Option<ManagedRuleSetList>,
     #[doc = "Describes Frontend Endpoints associated with this Web Application Firewall policy."]
-    #[serde(rename = "frontendEndpointLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendEndpointLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_endpoint_links: Vec<FrontendEndpointLink>,
     #[doc = "Describes Routing Rules associated with this Web Application Firewall policy."]
-    #[serde(rename = "routingRuleLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "routingRuleLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routing_rule_links: Vec<RoutingRuleLink>,
     #[doc = "Describes Security Policy associated with this Web Application Firewall policy."]
-    #[serde(rename = "securityPolicyLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityPolicyLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_policy_links: Vec<SecurityPolicyLink>,
     #[doc = "Provisioning state of the policy."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/guestconfiguration/src/package_2018_06_30_preview/models.rs b/services/mgmt/guestconfiguration/src/package_2018_06_30_preview/models.rs
index f9317f128b..2becba9fb0 100644
--- a/services/mgmt/guestconfiguration/src/package_2018_06_30_preview/models.rs
+++ b/services/mgmt/guestconfiguration/src/package_2018_06_30_preview/models.rs
@@ -37,7 +37,11 @@ pub struct AssignmentReportDetails {
     #[serde(rename = "operationType", default, skip_serializing_if = "Option::is_none")]
     pub operation_type: Option<assignment_report_details::OperationType>,
     #[doc = "The list of resources for which guest configuration assignment compliance is checked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<AssignmentReportResource>,
 }
 impl AssignmentReportDetails {
@@ -131,7 +135,11 @@ pub struct AssignmentReportResource {
     #[serde(rename = "complianceStatus", default, skip_serializing_if = "Option::is_none")]
     pub compliance_status: Option<assignment_report_resource::ComplianceStatus>,
     #[doc = "Compliance reason and reason code for a resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons: Vec<AssignmentReportResourceComplianceReason>,
     #[doc = "Properties of a guest configuration assignment resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -384,7 +392,11 @@ impl GuestConfigurationAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GuestConfigurationAssignmentList {
     #[doc = "Result of the list guest configuration assignment operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GuestConfigurationAssignment>,
 }
 impl azure_core::Continuable for GuestConfigurationAssignmentList {
@@ -533,7 +545,11 @@ impl GuestConfigurationAssignmentReport {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GuestConfigurationAssignmentReportList {
     #[doc = "List of reports for the guest configuration. Report contains information such as compliance status, reason and more."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GuestConfigurationAssignmentReport>,
 }
 impl GuestConfigurationAssignmentReportList {
@@ -632,7 +648,12 @@ pub struct GuestConfigurationNavigation {
     #[serde(rename = "contentHash", default, skip_serializing_if = "Option::is_none")]
     pub content_hash: Option<String>,
     #[doc = "The configuration parameters for the guest configuration."]
-    #[serde(rename = "configurationParameter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configurationParameter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configuration_parameter: Vec<ConfigurationParameter>,
     #[doc = "Configuration setting of LCM (Local Configuration Manager)."]
     #[serde(rename = "configurationSetting", default, skip_serializing_if = "Option::is_none")]
@@ -740,7 +761,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of Automation operations supported by the Automation resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationList {
diff --git a/services/mgmt/guestconfiguration/src/package_2018_11_20/models.rs b/services/mgmt/guestconfiguration/src/package_2018_11_20/models.rs
index d316ef80b6..bc039b5edb 100644
--- a/services/mgmt/guestconfiguration/src/package_2018_11_20/models.rs
+++ b/services/mgmt/guestconfiguration/src/package_2018_11_20/models.rs
@@ -37,7 +37,11 @@ pub struct AssignmentReportDetails {
     #[serde(rename = "operationType", default, skip_serializing_if = "Option::is_none")]
     pub operation_type: Option<assignment_report_details::OperationType>,
     #[doc = "The list of resources for which guest configuration assignment compliance is checked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<AssignmentReportResource>,
 }
 impl AssignmentReportDetails {
@@ -131,7 +135,11 @@ pub struct AssignmentReportResource {
     #[serde(rename = "complianceStatus", default, skip_serializing_if = "Option::is_none")]
     pub compliance_status: Option<assignment_report_resource::ComplianceStatus>,
     #[doc = "Compliance reason and reason code for a resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons: Vec<AssignmentReportResourceComplianceReason>,
     #[doc = "Properties of a guest configuration assignment resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -387,7 +395,11 @@ impl GuestConfigurationAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GuestConfigurationAssignmentList {
     #[doc = "Result of the list guest configuration assignment operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GuestConfigurationAssignment>,
 }
 impl azure_core::Continuable for GuestConfigurationAssignmentList {
@@ -417,7 +429,12 @@ pub struct GuestConfigurationAssignmentProperties {
     #[serde(rename = "latestReportId", default, skip_serializing_if = "Option::is_none")]
     pub latest_report_id: Option<String>,
     #[doc = "The list of VM Compliance data for VMSS"]
-    #[serde(rename = "vmssVMList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmssVMList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vmss_vm_list: Vec<VmssvmInfo>,
     #[doc = "Type of the resource - VMSS / VM"]
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
@@ -545,7 +562,11 @@ impl GuestConfigurationAssignmentReport {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GuestConfigurationAssignmentReportList {
     #[doc = "List of reports for the guest configuration. Report contains information such as compliance status, reason and more."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GuestConfigurationAssignmentReport>,
 }
 impl GuestConfigurationAssignmentReportList {
@@ -653,10 +674,20 @@ pub struct GuestConfigurationNavigation {
     #[serde(rename = "assignmentType", default, skip_serializing_if = "Option::is_none")]
     pub assignment_type: Option<guest_configuration_navigation::AssignmentType>,
     #[doc = "The configuration parameters for the guest configuration."]
-    #[serde(rename = "configurationParameter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configurationParameter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configuration_parameter: Vec<ConfigurationParameter>,
     #[doc = "The protected configuration parameters for the guest configuration."]
-    #[serde(rename = "configurationProtectedParameter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configurationProtectedParameter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configuration_protected_parameter: Vec<ConfigurationParameter>,
     #[doc = "Configuration setting of LCM (Local Configuration Manager)."]
     #[serde(rename = "configurationSetting", default, skip_serializing_if = "Option::is_none")]
@@ -805,7 +836,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of Automation operations supported by the Automation resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationList {
diff --git a/services/mgmt/guestconfiguration/src/package_2020_06_25/models.rs b/services/mgmt/guestconfiguration/src/package_2020_06_25/models.rs
index 775062a9e6..0fa0525e85 100644
--- a/services/mgmt/guestconfiguration/src/package_2020_06_25/models.rs
+++ b/services/mgmt/guestconfiguration/src/package_2020_06_25/models.rs
@@ -45,7 +45,11 @@ pub struct AssignmentReport {
     #[serde(rename = "operationType", default, skip_serializing_if = "Option::is_none")]
     pub operation_type: Option<assignment_report::OperationType>,
     #[doc = "The list of resources for which guest configuration assignment compliance is checked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<AssignmentReportResource>,
 }
 impl AssignmentReport {
@@ -151,7 +155,11 @@ pub struct AssignmentReportDetails {
     #[serde(rename = "operationType", default, skip_serializing_if = "Option::is_none")]
     pub operation_type: Option<assignment_report_details::OperationType>,
     #[doc = "The list of resources for which guest configuration assignment compliance is checked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<AssignmentReportResource>,
 }
 impl AssignmentReportDetails {
@@ -248,7 +256,11 @@ pub struct AssignmentReportResource {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Compliance reason and reason code for a resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons: Vec<AssignmentReportResourceComplianceReason>,
     #[doc = "Properties of a guest configuration assignment resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -504,7 +516,11 @@ impl GuestConfigurationAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GuestConfigurationAssignmentList {
     #[doc = "Result of the list guest configuration assignment operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GuestConfigurationAssignment>,
 }
 impl azure_core::Continuable for GuestConfigurationAssignmentList {
@@ -543,7 +559,12 @@ pub struct GuestConfigurationAssignmentProperties {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "The list of VM Compliance data for VMSS"]
-    #[serde(rename = "vmssVMList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmssVMList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vmss_vm_list: Vec<VmssvmInfo>,
     #[serde(rename = "latestAssignmentReport", default, skip_serializing_if = "Option::is_none")]
     pub latest_assignment_report: Option<AssignmentReport>,
@@ -667,7 +688,11 @@ impl GuestConfigurationAssignmentReport {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GuestConfigurationAssignmentReportList {
     #[doc = "List of reports for the guest configuration. Report contains information such as compliance status, reason and more."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GuestConfigurationAssignmentReport>,
 }
 impl GuestConfigurationAssignmentReportList {
@@ -775,10 +800,20 @@ pub struct GuestConfigurationNavigation {
     #[serde(rename = "contentType", default, skip_serializing_if = "Option::is_none")]
     pub content_type: Option<String>,
     #[doc = "The configuration parameters for the guest configuration."]
-    #[serde(rename = "configurationParameter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configurationParameter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configuration_parameter: Vec<ConfigurationParameter>,
     #[doc = "The protected configuration parameters for the guest configuration."]
-    #[serde(rename = "configurationProtectedParameter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configurationProtectedParameter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configuration_protected_parameter: Vec<ConfigurationParameter>,
     #[doc = "Configuration setting of LCM (Local Configuration Manager)."]
     #[serde(rename = "configurationSetting", default, skip_serializing_if = "Option::is_none")]
@@ -927,7 +962,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of Automation operations supported by the Automation resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationList {
diff --git a/services/mgmt/guestconfiguration/src/package_2021_01_25/models.rs b/services/mgmt/guestconfiguration/src/package_2021_01_25/models.rs
index 7b4931ff04..17c086f82b 100644
--- a/services/mgmt/guestconfiguration/src/package_2021_01_25/models.rs
+++ b/services/mgmt/guestconfiguration/src/package_2021_01_25/models.rs
@@ -45,7 +45,11 @@ pub struct AssignmentReport {
     #[serde(rename = "operationType", default, skip_serializing_if = "Option::is_none")]
     pub operation_type: Option<assignment_report::OperationType>,
     #[doc = "The list of resources for which guest configuration assignment compliance is checked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<AssignmentReportResource>,
 }
 impl AssignmentReport {
@@ -151,7 +155,11 @@ pub struct AssignmentReportDetails {
     #[serde(rename = "operationType", default, skip_serializing_if = "Option::is_none")]
     pub operation_type: Option<assignment_report_details::OperationType>,
     #[doc = "The list of resources for which guest configuration assignment compliance is checked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<AssignmentReportResource>,
 }
 impl AssignmentReportDetails {
@@ -248,7 +256,11 @@ pub struct AssignmentReportResource {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Compliance reason and reason code for a resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons: Vec<AssignmentReportResourceComplianceReason>,
     #[doc = "Properties of a guest configuration assignment resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -507,7 +519,11 @@ impl GuestConfigurationAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GuestConfigurationAssignmentList {
     #[doc = "Result of the list guest configuration assignment operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GuestConfigurationAssignment>,
 }
 impl azure_core::Continuable for GuestConfigurationAssignmentList {
@@ -557,7 +573,12 @@ pub struct GuestConfigurationAssignmentProperties {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "The list of VM Compliance data for VMSS"]
-    #[serde(rename = "vmssVMList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmssVMList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vmss_vm_list: Vec<VmssvmInfo>,
 }
 impl GuestConfigurationAssignmentProperties {
@@ -670,7 +691,11 @@ impl GuestConfigurationAssignmentReport {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GuestConfigurationAssignmentReportList {
     #[doc = "List of reports for the guest configuration. Report contains information such as compliance status, reason and more."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GuestConfigurationAssignmentReport>,
 }
 impl GuestConfigurationAssignmentReportList {
@@ -778,10 +803,20 @@ pub struct GuestConfigurationNavigation {
     #[serde(rename = "contentType", default, skip_serializing_if = "Option::is_none")]
     pub content_type: Option<String>,
     #[doc = "The configuration parameters for the guest configuration."]
-    #[serde(rename = "configurationParameter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configurationParameter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configuration_parameter: Vec<ConfigurationParameter>,
     #[doc = "The protected configuration parameters for the guest configuration."]
-    #[serde(rename = "configurationProtectedParameter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configurationProtectedParameter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configuration_protected_parameter: Vec<ConfigurationParameter>,
     #[doc = "Configuration setting of LCM (Local Configuration Manager)."]
     #[serde(rename = "configurationSetting", default, skip_serializing_if = "Option::is_none")]
@@ -930,7 +965,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of Automation operations supported by the Automation resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationList {
diff --git a/services/mgmt/guestconfiguration/src/package_2022_01_25/models.rs b/services/mgmt/guestconfiguration/src/package_2022_01_25/models.rs
index 36f7264c96..4b777582cf 100644
--- a/services/mgmt/guestconfiguration/src/package_2022_01_25/models.rs
+++ b/services/mgmt/guestconfiguration/src/package_2022_01_25/models.rs
@@ -45,7 +45,11 @@ pub struct AssignmentReport {
     #[serde(rename = "operationType", default, skip_serializing_if = "Option::is_none")]
     pub operation_type: Option<assignment_report::OperationType>,
     #[doc = "The list of resources for which guest configuration assignment compliance is checked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<AssignmentReportResource>,
 }
 impl AssignmentReport {
@@ -151,7 +155,11 @@ pub struct AssignmentReportDetails {
     #[serde(rename = "operationType", default, skip_serializing_if = "Option::is_none")]
     pub operation_type: Option<assignment_report_details::OperationType>,
     #[doc = "The list of resources for which guest configuration assignment compliance is checked."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<AssignmentReportResource>,
 }
 impl AssignmentReportDetails {
@@ -248,7 +256,11 @@ pub struct AssignmentReportResource {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Compliance reason and reason code for a resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons: Vec<AssignmentReportResourceComplianceReason>,
     #[doc = "Properties of a guest configuration assignment resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -507,7 +519,11 @@ impl GuestConfigurationAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GuestConfigurationAssignmentList {
     #[doc = "Result of the list guest configuration assignment operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GuestConfigurationAssignment>,
 }
 impl azure_core::Continuable for GuestConfigurationAssignmentList {
@@ -557,7 +573,12 @@ pub struct GuestConfigurationAssignmentProperties {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "The list of VM Compliance data for VMSS"]
-    #[serde(rename = "vmssVMList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmssVMList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vmss_vm_list: Vec<VmssvmInfo>,
 }
 impl GuestConfigurationAssignmentProperties {
@@ -670,7 +691,11 @@ impl GuestConfigurationAssignmentReport {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GuestConfigurationAssignmentReportList {
     #[doc = "List of reports for the guest configuration. Report contains information such as compliance status, reason and more."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GuestConfigurationAssignmentReport>,
 }
 impl azure_core::Continuable for GuestConfigurationAssignmentReportList {
@@ -787,10 +812,20 @@ pub struct GuestConfigurationNavigation {
     #[serde(rename = "contentType", default, skip_serializing_if = "Option::is_none")]
     pub content_type: Option<String>,
     #[doc = "The configuration parameters for the guest configuration."]
-    #[serde(rename = "configurationParameter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configurationParameter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configuration_parameter: Vec<ConfigurationParameter>,
     #[doc = "The protected configuration parameters for the guest configuration."]
-    #[serde(rename = "configurationProtectedParameter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configurationProtectedParameter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configuration_protected_parameter: Vec<ConfigurationParameter>,
     #[doc = "Configuration setting of LCM (Local Configuration Manager)."]
     #[serde(rename = "configurationSetting", default, skip_serializing_if = "Option::is_none")]
@@ -939,7 +974,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of Automation operations supported by the Automation resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationList {
diff --git a/services/mgmt/hanaon/src/package_2017_11/models.rs b/services/mgmt/hanaon/src/package_2017_11/models.rs
index 82434f3596..ccb47127c9 100644
--- a/services/mgmt/hanaon/src/package_2017_11/models.rs
+++ b/services/mgmt/hanaon/src/package_2017_11/models.rs
@@ -239,7 +239,11 @@ pub mod hana_instance_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HanaInstancesListResult {
     #[doc = "The list of SAP HANA on Azure instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HanaInstance>,
     #[doc = "The URL to get the next set of HANA instances."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -475,7 +479,12 @@ impl MonitoringDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfile {
     #[doc = "Specifies the network interfaces for the HANA instance."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<IpAddress>,
     #[doc = "Specifies the circuit id for connecting to express route."]
     #[serde(rename = "circuitId", default, skip_serializing_if = "Option::is_none")]
@@ -529,7 +538,11 @@ impl Operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of HANA operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationList {
@@ -598,10 +611,20 @@ pub struct StorageProfile {
     #[serde(rename = "nfsIpAddress", default, skip_serializing_if = "Option::is_none")]
     pub nfs_ip_address: Option<String>,
     #[doc = "Specifies information about the operating system disk used by the hana instance."]
-    #[serde(rename = "osDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "osDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub os_disks: Vec<Disk>,
     #[doc = "Specifies information related to SAP system IDs for the hana instance."]
-    #[serde(rename = "hanaSids", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hanaSids",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hana_sids: Vec<SapSystemId>,
 }
 impl StorageProfile {
diff --git a/services/mgmt/hanaon/src/package_2020_02_07_preview/models.rs b/services/mgmt/hanaon/src/package_2020_02_07_preview/models.rs
index c801415057..bf6f728ff5 100644
--- a/services/mgmt/hanaon/src/package_2020_02_07_preview/models.rs
+++ b/services/mgmt/hanaon/src/package_2020_02_07_preview/models.rs
@@ -82,7 +82,11 @@ impl Operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of HANA operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationList {
@@ -114,7 +118,11 @@ impl ProviderInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderInstanceListResult {
     #[doc = "The list of provider instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderInstance>,
     #[doc = "The URL to get the next set of provider instances."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -252,7 +260,11 @@ impl SapMonitor {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SapMonitorListResult {
     #[doc = "The list of SAP monitors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SapMonitor>,
     #[doc = "The URL to get the next set of SAP monitors."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/hardwaresecuritymodules/src/package_2018_10/models.rs b/services/mgmt/hardwaresecuritymodules/src/package_2018_10/models.rs
index e72b9c4c46..fcef33697e 100644
--- a/services/mgmt/hardwaresecuritymodules/src/package_2018_10/models.rs
+++ b/services/mgmt/hardwaresecuritymodules/src/package_2018_10/models.rs
@@ -50,7 +50,11 @@ impl DedicatedHsmError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedHsmListResult {
     #[doc = "The list of dedicated HSMs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DedicatedHsm>,
     #[doc = "The URL to get the next set of dedicated hsms."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -111,7 +115,11 @@ pub mod dedicated_hsm_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedHsmOperationListResult {
     #[doc = "List of Dedicated HSM Resource Provider operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DedicatedHsmOperation>,
 }
 impl azure_core::Continuable for DedicatedHsmOperationListResult {
@@ -246,7 +254,12 @@ pub struct NetworkProfile {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub subnet: Option<ApiEntityReference>,
     #[doc = "Specifies the list of resource Ids for the network interfaces associated with the dedicated HSM."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
 }
 impl NetworkProfile {
@@ -272,7 +285,11 @@ pub struct Resource {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<Sku>,
     #[doc = "The Dedicated Hsm zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Resource tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -295,7 +312,11 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceListResult {
     #[doc = "The list of dedicated HSM resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Resource>,
     #[doc = "The URL to get the next set of dedicated HSM resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/hardwaresecuritymodules/src/package_2021_11/models.rs b/services/mgmt/hardwaresecuritymodules/src/package_2021_11/models.rs
index 4f4f19237e..6cf2959045 100644
--- a/services/mgmt/hardwaresecuritymodules/src/package_2021_11/models.rs
+++ b/services/mgmt/hardwaresecuritymodules/src/package_2021_11/models.rs
@@ -57,7 +57,11 @@ impl DedicatedHsmError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedHsmListResult {
     #[doc = "The list of dedicated HSMs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DedicatedHsm>,
     #[doc = "The URL to get the next set of dedicated hsms."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -120,7 +124,11 @@ pub mod dedicated_hsm_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedHsmOperationListResult {
     #[doc = "List of Dedicated HSM Resource Provider operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DedicatedHsmOperation>,
 }
 impl azure_core::Continuable for DedicatedHsmOperationListResult {
@@ -227,7 +235,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The Ports and Protocols used when connecting to domainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -337,7 +350,12 @@ pub struct NetworkProfile {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub subnet: Option<ApiEntityReference>,
     #[doc = "Specifies the list of resource Ids for the network interfaces associated with the dedicated HSM."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
 }
 impl NetworkProfile {
@@ -352,7 +370,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that dedicated hsm service connects to"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -398,7 +420,11 @@ pub struct Resource {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<Sku>,
     #[doc = "The Dedicated Hsm zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Resource tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -421,7 +447,11 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceListResult {
     #[doc = "The list of dedicated HSM resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Resource>,
     #[doc = "The URL to get the next set of dedicated HSM resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/hdinsight/src/package_2015_03_preview/models.rs b/services/mgmt/hdinsight/src/package_2015_03_preview/models.rs
index aac756b52e..68e0b2ca91 100644
--- a/services/mgmt/hdinsight/src/package_2015_03_preview/models.rs
+++ b/services/mgmt/hdinsight/src/package_2015_03_preview/models.rs
@@ -78,7 +78,12 @@ impl ApplicationGetEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGetHttpsEndpoint {
     #[doc = "The list of access modes for the application."]
-    #[serde(rename = "accessModes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessModes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_modes: Vec<String>,
     #[doc = "The location of the endpoint."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -108,7 +113,11 @@ impl ApplicationGetHttpsEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationListResult {
     #[doc = "The list of HDInsight applications installed on HDInsight cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "The URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -132,16 +141,36 @@ pub struct ApplicationProperties {
     #[serde(rename = "computeProfile", default, skip_serializing_if = "Option::is_none")]
     pub compute_profile: Option<ComputeProfile>,
     #[doc = "The list of install script actions."]
-    #[serde(rename = "installScriptActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "installScriptActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub install_script_actions: Vec<RuntimeScriptAction>,
     #[doc = "The list of uninstall script actions."]
-    #[serde(rename = "uninstallScriptActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "uninstallScriptActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub uninstall_script_actions: Vec<RuntimeScriptAction>,
     #[doc = "The list of application HTTPS endpoints."]
-    #[serde(rename = "httpsEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpsEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub https_endpoints: Vec<ApplicationGetHttpsEndpoint>,
     #[doc = "The list of application SSH endpoints."]
-    #[serde(rename = "sshEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sshEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ssh_endpoints: Vec<ApplicationGetEndpoint>,
     #[doc = "The provisioning state of the application."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -153,7 +182,11 @@ pub struct ApplicationProperties {
     #[serde(rename = "applicationState", default, skip_serializing_if = "Option::is_none")]
     pub application_state: Option<String>,
     #[doc = "The list of errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<Errors>,
     #[doc = "The application create date time."]
     #[serde(rename = "createdDate", default, skip_serializing_if = "Option::is_none")]
@@ -241,7 +274,11 @@ pub struct AutoscaleRecurrence {
     #[serde(rename = "timeZone", default, skip_serializing_if = "Option::is_none")]
     pub time_zone: Option<String>,
     #[doc = "Array of schedule-based autoscale rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule: Vec<AutoscaleSchedule>,
 }
 impl AutoscaleRecurrence {
@@ -253,7 +290,11 @@ impl AutoscaleRecurrence {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AutoscaleSchedule {
     #[doc = "Days of the week for a schedule-based autoscale rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days: Vec<String>,
     #[doc = "Time and capacity request parameters"]
     #[serde(rename = "timeAndCapacity", default, skip_serializing_if = "Option::is_none")]
@@ -328,7 +369,12 @@ pub struct AzureMonitorSelectedConfigurations {
     #[serde(rename = "globalConfigurations", default, skip_serializing_if = "Option::is_none")]
     pub global_configurations: Option<serde_json::Value>,
     #[doc = "The table list."]
-    #[serde(rename = "tableList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tableList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub table_list: Vec<AzureMonitorTableConfiguration>,
 }
 impl AzureMonitorSelectedConfigurations {
@@ -373,10 +419,20 @@ pub struct BillingResources {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub region: Option<String>,
     #[doc = "The billing meter information."]
-    #[serde(rename = "billingMeters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "billingMeters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub billing_meters: Vec<BillingMeters>,
     #[doc = "The managed disk billing information."]
-    #[serde(rename = "diskBillingMeters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskBillingMeters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_billing_meters: Vec<DiskBillingMeters>,
 }
 impl BillingResources {
@@ -388,19 +444,44 @@ impl BillingResources {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingResponseListResult {
     #[doc = "The virtual machine sizes to include or exclude."]
-    #[serde(rename = "vmSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_sizes: Vec<String>,
     #[doc = "The vm sizes which enable encryption at host."]
-    #[serde(rename = "vmSizesWithEncryptionAtHost", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizesWithEncryptionAtHost",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_sizes_with_encryption_at_host: Vec<String>,
     #[doc = "The virtual machine filtering mode. Effectively this can enabling or disabling the virtual machine sizes in a particular set."]
-    #[serde(rename = "vmSizeFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizeFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_size_filters: Vec<VmSizeCompatibilityFilterV2>,
     #[doc = "The vm size properties."]
-    #[serde(rename = "vmSizeProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizeProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_size_properties: Vec<VmSizeProperty>,
     #[doc = "The billing and managed disk billing resources for a region."]
-    #[serde(rename = "billingResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "billingResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub billing_resources: Vec<BillingResources>,
 }
 impl BillingResponseListResult {
@@ -421,10 +502,18 @@ pub struct CapabilitiesResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub vmsizes: Option<serde_json::Value>,
     #[doc = "The virtual machine size compatibility filters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vmsize_filters: Vec<VmSizeCompatibilityFilter>,
     #[doc = "The capability features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<String>,
     #[doc = "The regional quota capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -606,16 +695,31 @@ impl ClusterCreateRequestValidationParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterCreateValidationResult {
     #[doc = "The validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ValidationErrorInfo>,
     #[doc = "The validation warnings."]
-    #[serde(rename = "validationWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_warnings: Vec<ValidationErrorInfo>,
     #[doc = "The estimated creation duration."]
     #[serde(rename = "estimatedCreationDuration", default, skip_serializing_if = "Option::is_none")]
     pub estimated_creation_duration: Option<String>,
     #[doc = "The Azure active directory domain service resource details."]
-    #[serde(rename = "aaddsResourcesDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aaddsResourcesDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aadds_resources_details: Vec<AaddsResourceDetails>,
 }
 impl ClusterCreateValidationResult {
@@ -705,10 +809,19 @@ pub struct ClusterGetProperties {
     #[serde(rename = "quotaInfo", default, skip_serializing_if = "Option::is_none")]
     pub quota_info: Option<QuotaInfo>,
     #[doc = "The list of errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<Errors>,
     #[doc = "The list of connectivity endpoints."]
-    #[serde(rename = "connectivityEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectivityEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connectivity_endpoints: Vec<ConnectivityEndpoint>,
     #[doc = "The disk encryption properties"]
     #[serde(rename = "diskEncryptionProperties", default, skip_serializing_if = "Option::is_none")]
@@ -821,7 +934,11 @@ pub mod cluster_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListPersistedScriptActionsResult {
     #[doc = "The list of Persisted Script Actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RuntimeScriptAction>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -836,7 +953,11 @@ impl ClusterListPersistedScriptActionsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListResult {
     #[doc = "The list of Clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -856,7 +977,11 @@ impl ClusterListResult {
 #[doc = "The list runtime script action detail response."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListRuntimeScriptActionDetailResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RuntimeScriptActionDetail>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -940,7 +1065,11 @@ impl ComputeIsolationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeProfile {
     #[doc = "The list of roles in the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<Role>,
 }
 impl ComputeProfile {
@@ -1177,7 +1306,12 @@ impl ExcludedServicesConfig {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ExecuteScriptActionParameters {
     #[doc = "The list of run time script actions."]
-    #[serde(rename = "scriptActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scriptActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub script_actions: Vec<RuntimeScriptAction>,
     #[doc = "Gets or sets if the scripts needs to be persisted."]
     #[serde(rename = "persistOnSuccess")]
@@ -1322,10 +1456,20 @@ pub struct MetricSpecifications {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "The supported aggregation types of the metric specification."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The supported time grain types of the metric specification."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "The flag indicates whether enable regional mdm account or not."]
     #[serde(rename = "enableRegionalMdmAccount", default, skip_serializing_if = "Option::is_none")]
@@ -1355,7 +1499,11 @@ pub struct MetricSpecifications {
     #[serde(rename = "delegateMetricNameOverride", default, skip_serializing_if = "Option::is_none")]
     pub delegate_metric_name_override: Option<String>,
     #[doc = "The dimensions of the metric specification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
 }
 impl MetricSpecifications {
@@ -1534,7 +1682,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of HDInsight operations supported by the HDInsight resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1596,7 +1748,12 @@ pub struct QuotaCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub max_cores_allowed: Option<i64>,
     #[doc = "The list of region quota capabilities."]
-    #[serde(rename = "regionalQuotas", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "regionalQuotas",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regional_quotas: Vec<RegionalQuotaCapability>,
 }
 impl QuotaCapability {
@@ -1638,7 +1795,11 @@ impl RegionalQuotaCapability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegionsCapability {
     #[doc = "The list of region capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available: Vec<String>,
 }
 impl RegionsCapability {
@@ -1693,10 +1854,20 @@ pub struct Role {
     #[serde(rename = "virtualNetworkProfile", default, skip_serializing_if = "Option::is_none")]
     pub virtual_network_profile: Option<VirtualNetworkProfile>,
     #[doc = "The data disks groups for the role."]
-    #[serde(rename = "dataDisksGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisksGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks_groups: Vec<DataDisksGroups>,
     #[doc = "The list of script actions on the role."]
-    #[serde(rename = "scriptActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scriptActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub script_actions: Vec<ScriptAction>,
     #[doc = "Indicates whether encrypt the data disks."]
     #[serde(rename = "encryptDataDisks", default, skip_serializing_if = "Option::is_none")]
@@ -1755,7 +1926,12 @@ pub struct RuntimeScriptActionDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operation: Option<String>,
     #[doc = "The summary of script action execution result."]
-    #[serde(rename = "executionSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "executionSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub execution_summary: Vec<ScriptActionExecutionSummary>,
     #[doc = "The script action execution debug information."]
     #[serde(rename = "debugInformation", default, skip_serializing_if = "Option::is_none")]
@@ -1794,7 +1970,11 @@ impl ScriptAction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScriptActionExecutionHistoryList {
     #[doc = "The list of persisted script action details for the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RuntimeScriptActionDetail>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1839,7 +2019,11 @@ pub struct ScriptActionPersistedGetResponseSpec {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<String>,
     #[doc = "The list of roles where script will be executed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
     #[doc = "The application name for the script action."]
     #[serde(rename = "applicationName", default, skip_serializing_if = "Option::is_none")]
@@ -1854,7 +2038,11 @@ impl ScriptActionPersistedGetResponseSpec {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScriptActionsList {
     #[doc = "The list of persisted script action details for the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RuntimeScriptActionDetail>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1884,7 +2072,12 @@ pub struct SecurityProfile {
     #[serde(rename = "organizationalUnitDN", default, skip_serializing_if = "Option::is_none")]
     pub organizational_unit_dn: Option<String>,
     #[doc = "The LDAPS protocol URLs to communicate with the Active Directory."]
-    #[serde(rename = "ldapsUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ldapsUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ldaps_urls: Vec<String>,
     #[doc = "The domain user account that will have admin privileges on the cluster."]
     #[serde(rename = "domainUsername", default, skip_serializing_if = "Option::is_none")]
@@ -1893,7 +2086,12 @@ pub struct SecurityProfile {
     #[serde(rename = "domainUserPassword", default, skip_serializing_if = "Option::is_none")]
     pub domain_user_password: Option<String>,
     #[doc = "Optional. The Distinguished Names for cluster user groups"]
-    #[serde(rename = "clusterUsersGroupDNs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterUsersGroupDNs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_users_group_d_ns: Vec<String>,
     #[doc = "The resource ID of the user's Azure Active Directory Domain Service."]
     #[serde(rename = "aaddsResourceId", default, skip_serializing_if = "Option::is_none")]
@@ -1919,7 +2117,12 @@ pub mod security_profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "The metric specifications."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecifications>,
 }
 impl ServiceSpecification {
@@ -1931,7 +2134,12 @@ impl ServiceSpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SshProfile {
     #[doc = "The list of SSH public keys."]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<SshPublicKey>,
 }
 impl SshProfile {
@@ -1991,7 +2199,11 @@ impl StorageAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageProfile {
     #[doc = "The list of storage accounts in the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storageaccounts: Vec<StorageAccount>,
 }
 impl StorageProfile {
@@ -2077,7 +2289,11 @@ impl Usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsagesListResult {
     #[doc = "The list of usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl UsagesListResult {
@@ -2098,7 +2314,12 @@ pub struct ValidationErrorInfo {
     #[serde(rename = "errorResource", default, skip_serializing_if = "Option::is_none")]
     pub error_resource: Option<String>,
     #[doc = "The message arguments"]
-    #[serde(rename = "messageArguments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "messageArguments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub message_arguments: Vec<String>,
 }
 impl ValidationErrorInfo {
@@ -2131,7 +2352,11 @@ impl VersionSpec {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VersionsCapability {
     #[doc = "The list of version capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available: Vec<VersionSpec>,
 }
 impl VersionsCapability {
@@ -2161,22 +2386,52 @@ pub struct VmSizeCompatibilityFilter {
     #[serde(rename = "FilterMode", default, skip_serializing_if = "Option::is_none")]
     pub filter_mode: Option<String>,
     #[doc = "The list of regions."]
-    #[serde(rename = "Regions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Regions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<String>,
     #[doc = "The list of cluster types available."]
-    #[serde(rename = "ClusterFlavors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ClusterFlavors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_flavors: Vec<String>,
     #[doc = "The list of node types."]
-    #[serde(rename = "NodeTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_types: Vec<String>,
     #[doc = "The list of cluster versions."]
-    #[serde(rename = "ClusterVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ClusterVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_versions: Vec<String>,
     #[doc = "The list of OS types."]
-    #[serde(rename = "OsType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "OsType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub os_type: Vec<String>,
     #[doc = "The list of virtual machine sizes."]
-    #[serde(rename = "VMSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "VMSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_sizes: Vec<String>,
     #[doc = "Whether apply for ESP cluster. 'true' means only for ESP, 'false' means only for non-ESP, null or empty string or others mean for both."]
     #[serde(rename = "ESPApplied", default, skip_serializing_if = "Option::is_none")]
@@ -2197,22 +2452,51 @@ pub struct VmSizeCompatibilityFilterV2 {
     #[serde(rename = "filterMode", default, skip_serializing_if = "Option::is_none")]
     pub filter_mode: Option<vm_size_compatibility_filter_v2::FilterMode>,
     #[doc = "The list of regions under the effect of the filter."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<String>,
     #[doc = "The list of cluster flavors under the effect of the filter."]
-    #[serde(rename = "clusterFlavors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterFlavors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_flavors: Vec<String>,
     #[doc = "The list of node types affected by the filter."]
-    #[serde(rename = "nodeTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nodeTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_types: Vec<String>,
     #[doc = "The list of cluster versions affected in Major.Minor format."]
-    #[serde(rename = "clusterVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_versions: Vec<String>,
     #[doc = "The OSType affected, Windows or Linux."]
-    #[serde(rename = "osType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "osType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub os_type: Vec<String>,
     #[doc = "The list of virtual machine sizes to include or exclude."]
-    #[serde(rename = "vmSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_sizes: Vec<String>,
 }
 impl VmSizeCompatibilityFilterV2 {
@@ -2307,7 +2591,11 @@ impl VmSizeProperty {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmSizesCapability {
     #[doc = "The list of virtual machine size capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available: Vec<String>,
 }
 impl VmSizesCapability {
diff --git a/services/mgmt/hdinsight/src/package_2018_06_preview/models.rs b/services/mgmt/hdinsight/src/package_2018_06_preview/models.rs
index 669c8a0817..3269fed4fe 100644
--- a/services/mgmt/hdinsight/src/package_2018_06_preview/models.rs
+++ b/services/mgmt/hdinsight/src/package_2018_06_preview/models.rs
@@ -78,7 +78,12 @@ impl ApplicationGetEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGetHttpsEndpoint {
     #[doc = "The list of access modes for the application."]
-    #[serde(rename = "accessModes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessModes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_modes: Vec<String>,
     #[doc = "The location of the endpoint."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -108,7 +113,11 @@ impl ApplicationGetHttpsEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationListResult {
     #[doc = "The list of HDInsight applications installed on HDInsight cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "The URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -132,16 +141,36 @@ pub struct ApplicationProperties {
     #[serde(rename = "computeProfile", default, skip_serializing_if = "Option::is_none")]
     pub compute_profile: Option<ComputeProfile>,
     #[doc = "The list of install script actions."]
-    #[serde(rename = "installScriptActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "installScriptActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub install_script_actions: Vec<RuntimeScriptAction>,
     #[doc = "The list of uninstall script actions."]
-    #[serde(rename = "uninstallScriptActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "uninstallScriptActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub uninstall_script_actions: Vec<RuntimeScriptAction>,
     #[doc = "The list of application HTTPS endpoints."]
-    #[serde(rename = "httpsEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpsEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub https_endpoints: Vec<ApplicationGetHttpsEndpoint>,
     #[doc = "The list of application SSH endpoints."]
-    #[serde(rename = "sshEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sshEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ssh_endpoints: Vec<ApplicationGetEndpoint>,
     #[doc = "The provisioning state of the application."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -153,7 +182,11 @@ pub struct ApplicationProperties {
     #[serde(rename = "applicationState", default, skip_serializing_if = "Option::is_none")]
     pub application_state: Option<String>,
     #[doc = "The list of errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<Errors>,
     #[doc = "The application create date time."]
     #[serde(rename = "createdDate", default, skip_serializing_if = "Option::is_none")]
@@ -241,7 +274,11 @@ pub struct AutoscaleRecurrence {
     #[serde(rename = "timeZone", default, skip_serializing_if = "Option::is_none")]
     pub time_zone: Option<String>,
     #[doc = "Array of schedule-based autoscale rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule: Vec<AutoscaleSchedule>,
 }
 impl AutoscaleRecurrence {
@@ -253,7 +290,11 @@ impl AutoscaleRecurrence {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AutoscaleSchedule {
     #[doc = "Days of the week for a schedule-based autoscale rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days: Vec<String>,
     #[doc = "Time and capacity request parameters"]
     #[serde(rename = "timeAndCapacity", default, skip_serializing_if = "Option::is_none")]
@@ -328,7 +369,12 @@ pub struct AzureMonitorSelectedConfigurations {
     #[serde(rename = "globalConfigurations", default, skip_serializing_if = "Option::is_none")]
     pub global_configurations: Option<serde_json::Value>,
     #[doc = "The table list."]
-    #[serde(rename = "tableList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tableList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub table_list: Vec<AzureMonitorTableConfiguration>,
 }
 impl AzureMonitorSelectedConfigurations {
@@ -373,10 +419,20 @@ pub struct BillingResources {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub region: Option<String>,
     #[doc = "The billing meter information."]
-    #[serde(rename = "billingMeters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "billingMeters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub billing_meters: Vec<BillingMeters>,
     #[doc = "The managed disk billing information."]
-    #[serde(rename = "diskBillingMeters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskBillingMeters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_billing_meters: Vec<DiskBillingMeters>,
 }
 impl BillingResources {
@@ -388,19 +444,44 @@ impl BillingResources {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingResponseListResult {
     #[doc = "The virtual machine sizes to include or exclude."]
-    #[serde(rename = "vmSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_sizes: Vec<String>,
     #[doc = "The vm sizes which enable encryption at host."]
-    #[serde(rename = "vmSizesWithEncryptionAtHost", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizesWithEncryptionAtHost",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_sizes_with_encryption_at_host: Vec<String>,
     #[doc = "The virtual machine filtering mode. Effectively this can enabling or disabling the virtual machine sizes in a particular set."]
-    #[serde(rename = "vmSizeFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizeFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_size_filters: Vec<VmSizeCompatibilityFilterV2>,
     #[doc = "The vm size properties."]
-    #[serde(rename = "vmSizeProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizeProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_size_properties: Vec<VmSizeProperty>,
     #[doc = "The billing and managed disk billing resources for a region."]
-    #[serde(rename = "billingResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "billingResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub billing_resources: Vec<BillingResources>,
 }
 impl BillingResponseListResult {
@@ -421,10 +502,18 @@ pub struct CapabilitiesResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub vmsizes: Option<serde_json::Value>,
     #[doc = "The virtual machine size compatibility filters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vmsize_filters: Vec<VmSizeCompatibilityFilter>,
     #[doc = "The capability features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<String>,
     #[doc = "The regional quota capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -606,16 +695,31 @@ impl ClusterCreateRequestValidationParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterCreateValidationResult {
     #[doc = "The validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ValidationErrorInfo>,
     #[doc = "The validation warnings."]
-    #[serde(rename = "validationWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_warnings: Vec<ValidationErrorInfo>,
     #[doc = "The estimated creation duration."]
     #[serde(rename = "estimatedCreationDuration", default, skip_serializing_if = "Option::is_none")]
     pub estimated_creation_duration: Option<String>,
     #[doc = "The Azure active directory domain service resource details."]
-    #[serde(rename = "aaddsResourcesDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aaddsResourcesDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aadds_resources_details: Vec<AaddsResourceDetails>,
 }
 impl ClusterCreateValidationResult {
@@ -705,10 +809,19 @@ pub struct ClusterGetProperties {
     #[serde(rename = "quotaInfo", default, skip_serializing_if = "Option::is_none")]
     pub quota_info: Option<QuotaInfo>,
     #[doc = "The list of errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<Errors>,
     #[doc = "The list of connectivity endpoints."]
-    #[serde(rename = "connectivityEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectivityEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connectivity_endpoints: Vec<ConnectivityEndpoint>,
     #[doc = "The disk encryption properties"]
     #[serde(rename = "diskEncryptionProperties", default, skip_serializing_if = "Option::is_none")]
@@ -821,7 +934,11 @@ pub mod cluster_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListPersistedScriptActionsResult {
     #[doc = "The list of Persisted Script Actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RuntimeScriptAction>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -836,7 +953,11 @@ impl ClusterListPersistedScriptActionsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListResult {
     #[doc = "The list of Clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -856,7 +977,11 @@ impl ClusterListResult {
 #[doc = "The list runtime script action detail response."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListRuntimeScriptActionDetailResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RuntimeScriptActionDetail>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -940,7 +1065,11 @@ impl ComputeIsolationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeProfile {
     #[doc = "The list of roles in the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<Role>,
 }
 impl ComputeProfile {
@@ -1177,7 +1306,12 @@ impl ExcludedServicesConfig {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ExecuteScriptActionParameters {
     #[doc = "The list of run time script actions."]
-    #[serde(rename = "scriptActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scriptActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub script_actions: Vec<RuntimeScriptAction>,
     #[doc = "Gets or sets if the scripts needs to be persisted."]
     #[serde(rename = "persistOnSuccess")]
@@ -1322,10 +1456,20 @@ pub struct MetricSpecifications {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "The supported aggregation types of the metric specification."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The supported time grain types of the metric specification."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "The flag indicates whether enable regional mdm account or not."]
     #[serde(rename = "enableRegionalMdmAccount", default, skip_serializing_if = "Option::is_none")]
@@ -1355,7 +1499,11 @@ pub struct MetricSpecifications {
     #[serde(rename = "delegateMetricNameOverride", default, skip_serializing_if = "Option::is_none")]
     pub delegate_metric_name_override: Option<String>,
     #[doc = "The dimensions of the metric specification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
 }
 impl MetricSpecifications {
@@ -1534,7 +1682,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of HDInsight operations supported by the HDInsight resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1596,7 +1748,12 @@ pub struct QuotaCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub max_cores_allowed: Option<i64>,
     #[doc = "The list of region quota capabilities."]
-    #[serde(rename = "regionalQuotas", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "regionalQuotas",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regional_quotas: Vec<RegionalQuotaCapability>,
 }
 impl QuotaCapability {
@@ -1638,7 +1795,11 @@ impl RegionalQuotaCapability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegionsCapability {
     #[doc = "The list of region capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available: Vec<String>,
 }
 impl RegionsCapability {
@@ -1693,10 +1854,20 @@ pub struct Role {
     #[serde(rename = "virtualNetworkProfile", default, skip_serializing_if = "Option::is_none")]
     pub virtual_network_profile: Option<VirtualNetworkProfile>,
     #[doc = "The data disks groups for the role."]
-    #[serde(rename = "dataDisksGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisksGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks_groups: Vec<DataDisksGroups>,
     #[doc = "The list of script actions on the role."]
-    #[serde(rename = "scriptActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scriptActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub script_actions: Vec<ScriptAction>,
     #[doc = "Indicates whether encrypt the data disks."]
     #[serde(rename = "encryptDataDisks", default, skip_serializing_if = "Option::is_none")]
@@ -1755,7 +1926,12 @@ pub struct RuntimeScriptActionDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operation: Option<String>,
     #[doc = "The summary of script action execution result."]
-    #[serde(rename = "executionSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "executionSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub execution_summary: Vec<ScriptActionExecutionSummary>,
     #[doc = "The script action execution debug information."]
     #[serde(rename = "debugInformation", default, skip_serializing_if = "Option::is_none")]
@@ -1794,7 +1970,11 @@ impl ScriptAction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScriptActionExecutionHistoryList {
     #[doc = "The list of persisted script action details for the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RuntimeScriptActionDetail>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1839,7 +2019,11 @@ pub struct ScriptActionPersistedGetResponseSpec {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<String>,
     #[doc = "The list of roles where script will be executed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
     #[doc = "The application name for the script action."]
     #[serde(rename = "applicationName", default, skip_serializing_if = "Option::is_none")]
@@ -1854,7 +2038,11 @@ impl ScriptActionPersistedGetResponseSpec {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScriptActionsList {
     #[doc = "The list of persisted script action details for the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RuntimeScriptActionDetail>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1884,7 +2072,12 @@ pub struct SecurityProfile {
     #[serde(rename = "organizationalUnitDN", default, skip_serializing_if = "Option::is_none")]
     pub organizational_unit_dn: Option<String>,
     #[doc = "The LDAPS protocol URLs to communicate with the Active Directory."]
-    #[serde(rename = "ldapsUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ldapsUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ldaps_urls: Vec<String>,
     #[doc = "The domain user account that will have admin privileges on the cluster."]
     #[serde(rename = "domainUsername", default, skip_serializing_if = "Option::is_none")]
@@ -1893,7 +2086,12 @@ pub struct SecurityProfile {
     #[serde(rename = "domainUserPassword", default, skip_serializing_if = "Option::is_none")]
     pub domain_user_password: Option<String>,
     #[doc = "Optional. The Distinguished Names for cluster user groups"]
-    #[serde(rename = "clusterUsersGroupDNs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterUsersGroupDNs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_users_group_d_ns: Vec<String>,
     #[doc = "The resource ID of the user's Azure Active Directory Domain Service."]
     #[serde(rename = "aaddsResourceId", default, skip_serializing_if = "Option::is_none")]
@@ -1919,7 +2117,12 @@ pub mod security_profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "The metric specifications."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecifications>,
 }
 impl ServiceSpecification {
@@ -1931,7 +2134,12 @@ impl ServiceSpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SshProfile {
     #[doc = "The list of SSH public keys."]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<SshPublicKey>,
 }
 impl SshProfile {
@@ -1991,7 +2199,11 @@ impl StorageAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageProfile {
     #[doc = "The list of storage accounts in the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storageaccounts: Vec<StorageAccount>,
 }
 impl StorageProfile {
@@ -2077,7 +2289,11 @@ impl Usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsagesListResult {
     #[doc = "The list of usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl UsagesListResult {
@@ -2098,7 +2314,12 @@ pub struct ValidationErrorInfo {
     #[serde(rename = "errorResource", default, skip_serializing_if = "Option::is_none")]
     pub error_resource: Option<String>,
     #[doc = "The message arguments"]
-    #[serde(rename = "messageArguments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "messageArguments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub message_arguments: Vec<String>,
 }
 impl ValidationErrorInfo {
@@ -2131,7 +2352,11 @@ impl VersionSpec {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VersionsCapability {
     #[doc = "The list of version capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available: Vec<VersionSpec>,
 }
 impl VersionsCapability {
@@ -2161,22 +2386,52 @@ pub struct VmSizeCompatibilityFilter {
     #[serde(rename = "FilterMode", default, skip_serializing_if = "Option::is_none")]
     pub filter_mode: Option<String>,
     #[doc = "The list of regions."]
-    #[serde(rename = "Regions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Regions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<String>,
     #[doc = "The list of cluster types available."]
-    #[serde(rename = "ClusterFlavors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ClusterFlavors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_flavors: Vec<String>,
     #[doc = "The list of node types."]
-    #[serde(rename = "NodeTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_types: Vec<String>,
     #[doc = "The list of cluster versions."]
-    #[serde(rename = "ClusterVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ClusterVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_versions: Vec<String>,
     #[doc = "The list of OS types."]
-    #[serde(rename = "OsType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "OsType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub os_type: Vec<String>,
     #[doc = "The list of virtual machine sizes."]
-    #[serde(rename = "VMSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "VMSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_sizes: Vec<String>,
     #[doc = "Whether apply for ESP cluster. 'true' means only for ESP, 'false' means only for non-ESP, null or empty string or others mean for both."]
     #[serde(rename = "ESPApplied", default, skip_serializing_if = "Option::is_none")]
@@ -2197,22 +2452,51 @@ pub struct VmSizeCompatibilityFilterV2 {
     #[serde(rename = "filterMode", default, skip_serializing_if = "Option::is_none")]
     pub filter_mode: Option<vm_size_compatibility_filter_v2::FilterMode>,
     #[doc = "The list of regions under the effect of the filter."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<String>,
     #[doc = "The list of cluster flavors under the effect of the filter."]
-    #[serde(rename = "clusterFlavors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterFlavors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_flavors: Vec<String>,
     #[doc = "The list of node types affected by the filter."]
-    #[serde(rename = "nodeTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nodeTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_types: Vec<String>,
     #[doc = "The list of cluster versions affected in Major.Minor format."]
-    #[serde(rename = "clusterVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_versions: Vec<String>,
     #[doc = "The OSType affected, Windows or Linux."]
-    #[serde(rename = "osType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "osType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub os_type: Vec<String>,
     #[doc = "The list of virtual machine sizes to include or exclude."]
-    #[serde(rename = "vmSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_sizes: Vec<String>,
 }
 impl VmSizeCompatibilityFilterV2 {
@@ -2307,7 +2591,11 @@ impl VmSizeProperty {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmSizesCapability {
     #[doc = "The list of virtual machine size capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available: Vec<String>,
 }
 impl VmSizesCapability {
diff --git a/services/mgmt/hdinsight/src/package_2021_06/models.rs b/services/mgmt/hdinsight/src/package_2021_06/models.rs
index b41954e7f8..0a21fe277c 100644
--- a/services/mgmt/hdinsight/src/package_2021_06/models.rs
+++ b/services/mgmt/hdinsight/src/package_2021_06/models.rs
@@ -81,7 +81,12 @@ impl ApplicationGetEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGetHttpsEndpoint {
     #[doc = "The list of access modes for the application."]
-    #[serde(rename = "accessModes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessModes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_modes: Vec<String>,
     #[doc = "The location of the endpoint."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -111,7 +116,11 @@ impl ApplicationGetHttpsEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationListResult {
     #[doc = "The list of HDInsight applications installed on HDInsight cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "The URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -135,16 +144,36 @@ pub struct ApplicationProperties {
     #[serde(rename = "computeProfile", default, skip_serializing_if = "Option::is_none")]
     pub compute_profile: Option<ComputeProfile>,
     #[doc = "The list of install script actions."]
-    #[serde(rename = "installScriptActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "installScriptActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub install_script_actions: Vec<RuntimeScriptAction>,
     #[doc = "The list of uninstall script actions."]
-    #[serde(rename = "uninstallScriptActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "uninstallScriptActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub uninstall_script_actions: Vec<RuntimeScriptAction>,
     #[doc = "The list of application HTTPS endpoints."]
-    #[serde(rename = "httpsEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpsEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub https_endpoints: Vec<ApplicationGetHttpsEndpoint>,
     #[doc = "The list of application SSH endpoints."]
-    #[serde(rename = "sshEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sshEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ssh_endpoints: Vec<ApplicationGetEndpoint>,
     #[doc = "The provisioning state of the application."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -156,7 +185,11 @@ pub struct ApplicationProperties {
     #[serde(rename = "applicationState", default, skip_serializing_if = "Option::is_none")]
     pub application_state: Option<String>,
     #[doc = "The list of errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<Errors>,
     #[doc = "The application create date time."]
     #[serde(rename = "createdDate", default, skip_serializing_if = "Option::is_none")]
@@ -165,7 +198,12 @@ pub struct ApplicationProperties {
     #[serde(rename = "marketplaceIdentifier", default, skip_serializing_if = "Option::is_none")]
     pub marketplace_identifier: Option<String>,
     #[doc = "The private link configurations."]
-    #[serde(rename = "privateLinkConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_configurations: Vec<PrivateLinkConfiguration>,
 }
 impl ApplicationProperties {
@@ -279,7 +317,11 @@ pub struct AutoscaleRecurrence {
     #[serde(rename = "timeZone", default, skip_serializing_if = "Option::is_none")]
     pub time_zone: Option<String>,
     #[doc = "Array of schedule-based autoscale rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule: Vec<AutoscaleSchedule>,
 }
 impl AutoscaleRecurrence {
@@ -291,7 +333,11 @@ impl AutoscaleRecurrence {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AutoscaleSchedule {
     #[doc = "Days of the week for a schedule-based autoscale rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days: Vec<String>,
     #[doc = "Time and capacity request parameters"]
     #[serde(rename = "timeAndCapacity", default, skip_serializing_if = "Option::is_none")]
@@ -366,7 +412,12 @@ pub struct AzureMonitorSelectedConfigurations {
     #[serde(rename = "globalConfigurations", default, skip_serializing_if = "Option::is_none")]
     pub global_configurations: Option<serde_json::Value>,
     #[doc = "The table list."]
-    #[serde(rename = "tableList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tableList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub table_list: Vec<AzureMonitorTableConfiguration>,
 }
 impl AzureMonitorSelectedConfigurations {
@@ -411,10 +462,20 @@ pub struct BillingResources {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub region: Option<String>,
     #[doc = "The billing meter information."]
-    #[serde(rename = "billingMeters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "billingMeters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub billing_meters: Vec<BillingMeters>,
     #[doc = "The managed disk billing information."]
-    #[serde(rename = "diskBillingMeters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskBillingMeters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_billing_meters: Vec<DiskBillingMeters>,
 }
 impl BillingResources {
@@ -426,19 +487,44 @@ impl BillingResources {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingResponseListResult {
     #[doc = "The virtual machine sizes to include or exclude."]
-    #[serde(rename = "vmSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_sizes: Vec<String>,
     #[doc = "The vm sizes which enable encryption at host."]
-    #[serde(rename = "vmSizesWithEncryptionAtHost", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizesWithEncryptionAtHost",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_sizes_with_encryption_at_host: Vec<String>,
     #[doc = "The virtual machine filtering mode. Effectively this can enabling or disabling the virtual machine sizes in a particular set."]
-    #[serde(rename = "vmSizeFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizeFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_size_filters: Vec<VmSizeCompatibilityFilterV2>,
     #[doc = "The vm size properties."]
-    #[serde(rename = "vmSizeProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizeProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_size_properties: Vec<VmSizeProperty>,
     #[doc = "The billing and managed disk billing resources for a region."]
-    #[serde(rename = "billingResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "billingResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub billing_resources: Vec<BillingResources>,
 }
 impl BillingResponseListResult {
@@ -456,7 +542,11 @@ pub struct CapabilitiesResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub regions: Option<serde_json::Value>,
     #[doc = "The capability features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<String>,
     #[doc = "The regional quota capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -491,7 +581,11 @@ pub struct Cluster {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "The availability zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The properties of cluster."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -545,7 +639,11 @@ pub struct ClusterCreateParametersExtended {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<serde_json::Value>,
     #[doc = "The availability zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The cluster create parameters."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -602,7 +700,12 @@ pub struct ClusterCreateProperties {
     #[serde(rename = "computeIsolationProperties", default, skip_serializing_if = "Option::is_none")]
     pub compute_isolation_properties: Option<ComputeIsolationProperties>,
     #[doc = "The private link configurations."]
-    #[serde(rename = "privateLinkConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_configurations: Vec<PrivateLinkConfiguration>,
 }
 impl ClusterCreateProperties {
@@ -719,16 +822,31 @@ impl ClusterCreateRequestValidationParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterCreateValidationResult {
     #[doc = "The validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<ValidationErrorInfo>,
     #[doc = "The validation warnings."]
-    #[serde(rename = "validationWarnings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationWarnings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_warnings: Vec<ValidationErrorInfo>,
     #[doc = "The estimated creation duration."]
     #[serde(rename = "estimatedCreationDuration", default, skip_serializing_if = "Option::is_none")]
     pub estimated_creation_duration: Option<String>,
     #[doc = "The Azure active directory domain service resource details."]
-    #[serde(rename = "aaddsResourcesDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aaddsResourcesDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aadds_resources_details: Vec<AaddsResourceDetails>,
 }
 impl ClusterCreateValidationResult {
@@ -818,10 +936,19 @@ pub struct ClusterGetProperties {
     #[serde(rename = "quotaInfo", default, skip_serializing_if = "Option::is_none")]
     pub quota_info: Option<QuotaInfo>,
     #[doc = "The list of errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<Errors>,
     #[doc = "The list of connectivity endpoints."]
-    #[serde(rename = "connectivityEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectivityEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connectivity_endpoints: Vec<ConnectivityEndpoint>,
     #[doc = "The disk encryption properties"]
     #[serde(rename = "diskEncryptionProperties", default, skip_serializing_if = "Option::is_none")]
@@ -845,10 +972,20 @@ pub struct ClusterGetProperties {
     #[serde(rename = "computeIsolationProperties", default, skip_serializing_if = "Option::is_none")]
     pub compute_isolation_properties: Option<ComputeIsolationProperties>,
     #[doc = "The private link configurations."]
-    #[serde(rename = "privateLinkConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_configurations: Vec<PrivateLinkConfiguration>,
     #[doc = "The list of private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl ClusterGetProperties {
@@ -1071,7 +1208,11 @@ pub mod cluster_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListPersistedScriptActionsResult {
     #[doc = "The list of Persisted Script Actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RuntimeScriptAction>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1086,7 +1227,11 @@ impl ClusterListPersistedScriptActionsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListResult {
     #[doc = "The list of Clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1176,7 +1321,11 @@ impl ComputeIsolationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeProfile {
     #[doc = "The list of roles in the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<Role>,
 }
 impl ComputeProfile {
@@ -1444,7 +1593,12 @@ impl ExcludedServicesConfig {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ExecuteScriptActionParameters {
     #[doc = "The list of run time script actions."]
-    #[serde(rename = "scriptActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scriptActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub script_actions: Vec<RuntimeScriptAction>,
     #[doc = "Gets or sets if the scripts needs to be persisted."]
     #[serde(rename = "persistOnSuccess")]
@@ -1723,10 +1877,20 @@ pub struct MetricSpecifications {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "The supported aggregation types of the metric specification."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The supported time grain types of the metric specification."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "The flag indicates whether enable regional mdm account or not."]
     #[serde(rename = "enableRegionalMdmAccount", default, skip_serializing_if = "Option::is_none")]
@@ -1756,7 +1920,11 @@ pub struct MetricSpecifications {
     #[serde(rename = "delegateMetricNameOverride", default, skip_serializing_if = "Option::is_none")]
     pub delegate_metric_name_override: Option<String>,
     #[doc = "The dimensions of the metric specification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
 }
 impl MetricSpecifications {
@@ -1932,7 +2100,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of HDInsight operations supported by the HDInsight resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2009,7 +2181,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The list of private endpoint connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2213,7 +2389,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -2228,10 +2408,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -2325,7 +2515,12 @@ pub struct QuotaCapability {
     #[serde(rename = "maxCoresAllowed", default, skip_serializing_if = "Option::is_none")]
     pub max_cores_allowed: Option<i64>,
     #[doc = "The list of region quota capabilities."]
-    #[serde(rename = "regionalQuotas", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "regionalQuotas",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regional_quotas: Vec<RegionalQuotaCapability>,
 }
 impl QuotaCapability {
@@ -2367,7 +2562,11 @@ impl RegionalQuotaCapability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegionsCapability {
     #[doc = "The list of region capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available: Vec<String>,
 }
 impl RegionsCapability {
@@ -2434,10 +2633,20 @@ pub struct Role {
     #[serde(rename = "virtualNetworkProfile", default, skip_serializing_if = "Option::is_none")]
     pub virtual_network_profile: Option<VirtualNetworkProfile>,
     #[doc = "The data disks groups for the role."]
-    #[serde(rename = "dataDisksGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisksGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks_groups: Vec<DataDisksGroups>,
     #[doc = "The list of script actions on the role."]
-    #[serde(rename = "scriptActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scriptActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub script_actions: Vec<ScriptAction>,
     #[doc = "Indicates whether encrypt the data disks."]
     #[serde(rename = "encryptDataDisks", default, skip_serializing_if = "Option::is_none")]
@@ -2496,7 +2705,12 @@ pub struct RuntimeScriptActionDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operation: Option<String>,
     #[doc = "The summary of script action execution result."]
-    #[serde(rename = "executionSummary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "executionSummary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub execution_summary: Vec<ScriptActionExecutionSummary>,
     #[doc = "The script action execution debug information."]
     #[serde(rename = "debugInformation", default, skip_serializing_if = "Option::is_none")]
@@ -2535,7 +2749,11 @@ impl ScriptAction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScriptActionExecutionHistoryList {
     #[doc = "The list of persisted script action details for the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RuntimeScriptActionDetail>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2580,7 +2798,11 @@ pub struct ScriptActionPersistedGetResponseSpec {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parameters: Option<String>,
     #[doc = "The list of roles where script will be executed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
     #[doc = "The application name for the script action."]
     #[serde(rename = "applicationName", default, skip_serializing_if = "Option::is_none")]
@@ -2595,7 +2817,11 @@ impl ScriptActionPersistedGetResponseSpec {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScriptActionsList {
     #[doc = "The list of persisted script action details for the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RuntimeScriptActionDetail>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2625,7 +2851,12 @@ pub struct SecurityProfile {
     #[serde(rename = "organizationalUnitDN", default, skip_serializing_if = "Option::is_none")]
     pub organizational_unit_dn: Option<String>,
     #[doc = "The LDAPS protocol URLs to communicate with the Active Directory."]
-    #[serde(rename = "ldapsUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ldapsUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ldaps_urls: Vec<String>,
     #[doc = "The domain user account that will have admin privileges on the cluster."]
     #[serde(rename = "domainUsername", default, skip_serializing_if = "Option::is_none")]
@@ -2634,7 +2865,12 @@ pub struct SecurityProfile {
     #[serde(rename = "domainUserPassword", default, skip_serializing_if = "Option::is_none")]
     pub domain_user_password: Option<String>,
     #[doc = "Optional. The Distinguished Names for cluster user groups"]
-    #[serde(rename = "clusterUsersGroupDNs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterUsersGroupDNs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_users_group_d_ns: Vec<String>,
     #[doc = "The resource ID of the user's Azure Active Directory Domain Service."]
     #[serde(rename = "aaddsResourceId", default, skip_serializing_if = "Option::is_none")]
@@ -2690,7 +2926,12 @@ pub mod security_profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "The metric specifications."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecifications>,
 }
 impl ServiceSpecification {
@@ -2702,7 +2943,12 @@ impl ServiceSpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SshProfile {
     #[doc = "The list of SSH public keys."]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<SshPublicKey>,
 }
 impl SshProfile {
@@ -2762,7 +3008,11 @@ impl StorageAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageProfile {
     #[doc = "The list of storage accounts in the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storageaccounts: Vec<StorageAccount>,
 }
 impl StorageProfile {
@@ -2851,7 +3101,11 @@ impl Usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsagesListResult {
     #[doc = "The list of usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl UsagesListResult {
@@ -2890,7 +3144,12 @@ pub struct ValidationErrorInfo {
     #[serde(rename = "errorResource", default, skip_serializing_if = "Option::is_none")]
     pub error_resource: Option<String>,
     #[doc = "The message arguments"]
-    #[serde(rename = "messageArguments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "messageArguments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub message_arguments: Vec<String>,
 }
 impl ValidationErrorInfo {
@@ -2923,7 +3182,11 @@ impl VersionSpec {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VersionsCapability {
     #[doc = "The list of version capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available: Vec<VersionSpec>,
 }
 impl VersionsCapability {
@@ -2953,22 +3216,51 @@ pub struct VmSizeCompatibilityFilterV2 {
     #[serde(rename = "filterMode", default, skip_serializing_if = "Option::is_none")]
     pub filter_mode: Option<vm_size_compatibility_filter_v2::FilterMode>,
     #[doc = "The list of regions under the effect of the filter."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<String>,
     #[doc = "The list of cluster flavors under the effect of the filter."]
-    #[serde(rename = "clusterFlavors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterFlavors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_flavors: Vec<String>,
     #[doc = "The list of node types affected by the filter."]
-    #[serde(rename = "nodeTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nodeTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_types: Vec<String>,
     #[doc = "The list of cluster versions affected in Major.Minor format."]
-    #[serde(rename = "clusterVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_versions: Vec<String>,
     #[doc = "The OSType affected, Windows or Linux."]
-    #[serde(rename = "osType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "osType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub os_type: Vec<String>,
     #[doc = "The list of virtual machine sizes to include or exclude."]
-    #[serde(rename = "vmSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_sizes: Vec<String>,
     #[doc = "Whether apply for ESP cluster. 'true' means only for ESP, 'false' means only for non-ESP, null or empty string or others mean for both."]
     #[serde(rename = "espApplied", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/healthbot/src/package_2020_10_20_preview/models.rs b/services/mgmt/healthbot/src/package_2020_10_20_preview/models.rs
index cfe279af35..55addebc73 100644
--- a/services/mgmt/healthbot/src/package_2020_10_20_preview/models.rs
+++ b/services/mgmt/healthbot/src/package_2020_10_20_preview/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -31,7 +35,11 @@ pub struct BotResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of healthcare bot results and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HealthBot>,
 }
 impl azure_core::Continuable for BotResponseList {
@@ -110,10 +118,19 @@ pub mod error {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<Error>,
         #[doc = "The error additional info."]
-        #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalInfo",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_info: Vec<ErrorAdditionalInfo>,
     }
     impl Error {
diff --git a/services/mgmt/healthbot/src/package_2020_12_08/models.rs b/services/mgmt/healthbot/src/package_2020_12_08/models.rs
index 0a2c0ddb99..699debbdad 100644
--- a/services/mgmt/healthbot/src/package_2020_12_08/models.rs
+++ b/services/mgmt/healthbot/src/package_2020_12_08/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -31,7 +35,11 @@ pub struct BotResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of Healthbot results and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HealthBot>,
 }
 impl azure_core::Continuable for BotResponseList {
@@ -78,10 +86,19 @@ pub mod error {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<Error>,
         #[doc = "The error additional info."]
-        #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalInfo",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_info: Vec<ErrorAdditionalInfo>,
     }
     impl Error {
diff --git a/services/mgmt/healthbot/src/package_2020_12_08_preview/models.rs b/services/mgmt/healthbot/src/package_2020_12_08_preview/models.rs
index a0bbdf56b0..3c18b45c1c 100644
--- a/services/mgmt/healthbot/src/package_2020_12_08_preview/models.rs
+++ b/services/mgmt/healthbot/src/package_2020_12_08_preview/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -31,7 +35,11 @@ pub struct BotResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of healthcare bot results and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HealthBot>,
 }
 impl azure_core::Continuable for BotResponseList {
@@ -110,10 +118,19 @@ pub mod error {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<Error>,
         #[doc = "The error additional info."]
-        #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalInfo",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_info: Vec<ErrorAdditionalInfo>,
     }
     impl Error {
diff --git a/services/mgmt/healthbot/src/package_2021_06_10/models.rs b/services/mgmt/healthbot/src/package_2021_06_10/models.rs
index f0e1df03e3..5cb409cc09 100644
--- a/services/mgmt/healthbot/src/package_2021_06_10/models.rs
+++ b/services/mgmt/healthbot/src/package_2021_06_10/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -31,7 +35,11 @@ pub struct BotResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of Azure Health Bot results and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HealthBot>,
 }
 impl azure_core::Continuable for BotResponseList {
@@ -78,10 +86,19 @@ pub mod error {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<Error>,
         #[doc = "The error additional info."]
-        #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalInfo",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_info: Vec<ErrorAdditionalInfo>,
     }
     impl Error {
diff --git a/services/mgmt/healthbot/src/package_2021_08_24/models.rs b/services/mgmt/healthbot/src/package_2021_08_24/models.rs
index 933779cd36..f629a5e9e3 100644
--- a/services/mgmt/healthbot/src/package_2021_08_24/models.rs
+++ b/services/mgmt/healthbot/src/package_2021_08_24/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -31,7 +35,11 @@ pub struct BotResponseList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Gets the list of Azure Health Bot results and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HealthBot>,
 }
 impl azure_core::Continuable for BotResponseList {
@@ -78,10 +86,19 @@ pub mod error {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<Error>,
         #[doc = "The error additional info."]
-        #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalInfo",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_info: Vec<ErrorAdditionalInfo>,
     }
     impl Error {
diff --git a/services/mgmt/healthcareapis/src/package_2021_11/models.rs b/services/mgmt/healthcareapis/src/package_2021_11/models.rs
index 6f14a9fee4..f804e54934 100644
--- a/services/mgmt/healthcareapis/src/package_2021_11/models.rs
+++ b/services/mgmt/healthcareapis/src/package_2021_11/models.rs
@@ -47,7 +47,11 @@ pub struct DicomServiceAuthenticationConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub authority: Option<String>,
     #[doc = "The audiences for the service"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audiences: Vec<DicomAudience>,
 }
 impl DicomServiceAuthenticationConfiguration {
@@ -62,7 +66,11 @@ pub struct DicomServiceCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Dicom Services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DicomService>,
 }
 impl azure_core::Continuable for DicomServiceCollection {
@@ -102,7 +110,12 @@ pub struct DicomServiceProperties {
     #[serde(rename = "serviceUrl", default, skip_serializing_if = "Option::is_none")]
     pub service_url: Option<String>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -284,10 +297,20 @@ impl FhirServiceAccessPolicyEntry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FhirServiceAcrConfiguration {
     #[doc = "The list of the Azure container registry login servers."]
-    #[serde(rename = "loginServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_servers: Vec<String>,
     #[doc = "The list of Open Container Initiative (OCI) artifacts."]
-    #[serde(rename = "ociArtifacts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ociArtifacts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub oci_artifacts: Vec<ServiceOciArtifactEntry>,
 }
 impl FhirServiceAcrConfiguration {
@@ -320,7 +343,11 @@ pub struct FhirServiceCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Fhir Services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FhirService>,
 }
 impl azure_core::Continuable for FhirServiceCollection {
@@ -338,13 +365,25 @@ impl FhirServiceCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FhirServiceCorsConfiguration {
     #[doc = "The origins to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<CorsConfigurationOriginEntry>,
     #[doc = "The headers to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<CorsConfigurationHeaderEntry>,
     #[doc = "The methods to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub methods: Vec<CorsConfigurationMethodEntry>,
     #[doc = "The max age to be allowed via CORS."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -405,7 +444,12 @@ pub struct FhirServiceProperties {
     #[serde(rename = "exportConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub export_configuration: Option<FhirServiceExportConfiguration>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -448,7 +492,11 @@ pub struct IotConnectorCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of IoT Connectors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotConnector>,
 }
 impl azure_core::Continuable for IotConnectorCollection {
@@ -550,7 +598,11 @@ pub struct IotFhirDestinationCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of IoT Connector FHIR destinations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotFhirDestination>,
 }
 impl azure_core::Continuable for IotFhirDestinationCollection {
@@ -646,7 +698,11 @@ impl IotMappingProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -735,16 +791,30 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Optional. If set to true, then zero will be returned for time duration where no metric is emitted/published."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
     pub fill_gap_with_zero: Option<bool>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Name of the MDM namespace. Optional."]
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
@@ -970,7 +1040,11 @@ impl PrivateEndpointConnectionDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -982,7 +1056,11 @@ impl PrivateEndpointConnectionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResultDescription {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnectionDescription>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResultDescription {
@@ -1130,7 +1208,11 @@ impl PrivateLinkResourceDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResultDescription {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResourceDescription>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResultDescription {
@@ -1151,10 +1233,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1398,10 +1490,20 @@ impl ServiceAccessPolicyEntry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceAcrConfigurationInfo {
     #[doc = "The list of the ACR login servers."]
-    #[serde(rename = "loginServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_servers: Vec<String>,
     #[doc = "The list of Open Container Initiative (OCI) artifacts."]
-    #[serde(rename = "ociArtifacts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ociArtifacts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub oci_artifacts: Vec<ServiceOciArtifactEntry>,
 }
 impl ServiceAcrConfigurationInfo {
@@ -1432,13 +1534,25 @@ pub type ServiceCorsConfigurationHeaderEntry = String;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceCorsConfigurationInfo {
     #[doc = "The origins to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<ServiceCorsConfigurationOriginEntry>,
     #[doc = "The headers to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ServiceCorsConfigurationHeaderEntry>,
     #[doc = "The methods to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub methods: Vec<ServiceCorsConfigurationMethodEntry>,
     #[doc = "The max age to be allowed via CORS."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -1589,10 +1703,20 @@ impl ServiceOciArtifactEntry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -1628,7 +1752,11 @@ pub struct ServicesDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServicesDescription>,
 }
 impl azure_core::Continuable for ServicesDescriptionListResult {
@@ -1706,7 +1834,12 @@ pub struct ServicesProperties {
     #[serde(rename = "exportConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub export_configuration: Option<ServiceExportConfigurationInfo>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -1985,7 +2118,12 @@ pub mod workspace {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<ProvisioningState>,
         #[doc = "The list of private endpoint connections that are set up for this resource."]
-        #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "privateEndpointConnections",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
         #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
         #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -2004,7 +2142,11 @@ pub struct WorkspaceList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Collection of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
 }
 impl azure_core::Continuable for WorkspaceList {
diff --git a/services/mgmt/healthcareapis/src/package_2022_05/models.rs b/services/mgmt/healthcareapis/src/package_2022_05/models.rs
index e8f291cc5d..e35de2e300 100644
--- a/services/mgmt/healthcareapis/src/package_2022_05/models.rs
+++ b/services/mgmt/healthcareapis/src/package_2022_05/models.rs
@@ -21,13 +21,25 @@ impl CheckNameAvailabilityParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CorsConfiguration {
     #[doc = "The origins to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<CorsConfigurationOriginEntry>,
     #[doc = "The headers to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<CorsConfigurationHeaderEntry>,
     #[doc = "The methods to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub methods: Vec<CorsConfigurationMethodEntry>,
     #[doc = "The max age to be allowed via CORS."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -71,7 +83,11 @@ pub struct DicomServiceAuthenticationConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub authority: Option<String>,
     #[doc = "The audiences for the service"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audiences: Vec<DicomAudience>,
 }
 impl DicomServiceAuthenticationConfiguration {
@@ -86,7 +102,11 @@ pub struct DicomServiceCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Dicom Services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DicomService>,
 }
 impl azure_core::Continuable for DicomServiceCollection {
@@ -129,7 +149,12 @@ pub struct DicomServiceProperties {
     #[serde(rename = "serviceUrl", default, skip_serializing_if = "Option::is_none")]
     pub service_url: Option<String>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -311,10 +336,20 @@ impl FhirServiceAccessPolicyEntry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FhirServiceAcrConfiguration {
     #[doc = "The list of the Azure container registry login servers."]
-    #[serde(rename = "loginServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_servers: Vec<String>,
     #[doc = "The list of Open Container Initiative (OCI) artifacts."]
-    #[serde(rename = "ociArtifacts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ociArtifacts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub oci_artifacts: Vec<ServiceOciArtifactEntry>,
 }
 impl FhirServiceAcrConfiguration {
@@ -347,7 +382,11 @@ pub struct FhirServiceCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Fhir Services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FhirService>,
 }
 impl azure_core::Continuable for FhirServiceCollection {
@@ -365,13 +404,25 @@ impl FhirServiceCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FhirServiceCorsConfiguration {
     #[doc = "The origins to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<CorsConfigurationOriginEntry>,
     #[doc = "The headers to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<CorsConfigurationHeaderEntry>,
     #[doc = "The methods to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub methods: Vec<CorsConfigurationMethodEntry>,
     #[doc = "The max age to be allowed via CORS."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -432,7 +483,12 @@ pub struct FhirServiceProperties {
     #[serde(rename = "exportConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub export_configuration: Option<FhirServiceExportConfiguration>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -475,7 +531,11 @@ pub struct IotConnectorCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of IoT Connectors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotConnector>,
 }
 impl azure_core::Continuable for IotConnectorCollection {
@@ -577,7 +637,11 @@ pub struct IotFhirDestinationCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of IoT Connector FHIR destinations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotFhirDestination>,
 }
 impl azure_core::Continuable for IotFhirDestinationCollection {
@@ -673,7 +737,11 @@ impl IotMappingProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -762,16 +830,30 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Optional. If set to true, then zero will be returned for time duration where no metric is emitted/published."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
     pub fill_gap_with_zero: Option<bool>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Name of the MDM namespace. Optional."]
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
@@ -997,7 +1079,11 @@ impl PrivateEndpointConnectionDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -1009,7 +1095,11 @@ impl PrivateEndpointConnectionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResultDescription {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnectionDescription>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResultDescription {
@@ -1157,7 +1247,11 @@ impl PrivateLinkResourceDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResultDescription {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResourceDescription>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResultDescription {
@@ -1178,10 +1272,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1425,10 +1529,20 @@ impl ServiceAccessPolicyEntry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceAcrConfigurationInfo {
     #[doc = "The list of the ACR login servers."]
-    #[serde(rename = "loginServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_servers: Vec<String>,
     #[doc = "The list of Open Container Initiative (OCI) artifacts."]
-    #[serde(rename = "ociArtifacts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ociArtifacts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub oci_artifacts: Vec<ServiceOciArtifactEntry>,
 }
 impl ServiceAcrConfigurationInfo {
@@ -1459,13 +1573,25 @@ pub type ServiceCorsConfigurationHeaderEntry = String;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceCorsConfigurationInfo {
     #[doc = "The origins to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<ServiceCorsConfigurationOriginEntry>,
     #[doc = "The headers to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ServiceCorsConfigurationHeaderEntry>,
     #[doc = "The methods to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub methods: Vec<ServiceCorsConfigurationMethodEntry>,
     #[doc = "The max age to be allowed via CORS."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -1616,10 +1742,20 @@ impl ServiceOciArtifactEntry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -1655,7 +1791,11 @@ pub struct ServicesDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServicesDescription>,
 }
 impl azure_core::Continuable for ServicesDescriptionListResult {
@@ -1733,7 +1873,12 @@ pub struct ServicesProperties {
     #[serde(rename = "exportConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub export_configuration: Option<ServiceExportConfigurationInfo>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -2012,7 +2157,12 @@ pub mod workspace {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<ProvisioningState>,
         #[doc = "The list of private endpoint connections that are set up for this resource."]
-        #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "privateEndpointConnections",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
         #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
         #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -2031,7 +2181,11 @@ pub struct WorkspaceList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Collection of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
 }
 impl azure_core::Continuable for WorkspaceList {
diff --git a/services/mgmt/healthcareapis/src/package_2022_06/models.rs b/services/mgmt/healthcareapis/src/package_2022_06/models.rs
index 8a74576935..6303ed38de 100644
--- a/services/mgmt/healthcareapis/src/package_2022_06/models.rs
+++ b/services/mgmt/healthcareapis/src/package_2022_06/models.rs
@@ -21,13 +21,25 @@ impl CheckNameAvailabilityParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CorsConfiguration {
     #[doc = "The origins to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<CorsConfigurationOriginEntry>,
     #[doc = "The headers to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<CorsConfigurationHeaderEntry>,
     #[doc = "The methods to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub methods: Vec<CorsConfigurationMethodEntry>,
     #[doc = "The max age to be allowed via CORS."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -71,7 +83,11 @@ pub struct DicomServiceAuthenticationConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub authority: Option<String>,
     #[doc = "The audiences for the service"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audiences: Vec<DicomAudience>,
 }
 impl DicomServiceAuthenticationConfiguration {
@@ -86,7 +102,11 @@ pub struct DicomServiceCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Dicom Services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DicomService>,
 }
 impl azure_core::Continuable for DicomServiceCollection {
@@ -129,7 +149,12 @@ pub struct DicomServiceProperties {
     #[serde(rename = "serviceUrl", default, skip_serializing_if = "Option::is_none")]
     pub service_url: Option<String>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -311,10 +336,20 @@ impl FhirServiceAccessPolicyEntry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FhirServiceAcrConfiguration {
     #[doc = "The list of the Azure container registry login servers."]
-    #[serde(rename = "loginServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_servers: Vec<String>,
     #[doc = "The list of Open Container Initiative (OCI) artifacts."]
-    #[serde(rename = "ociArtifacts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ociArtifacts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub oci_artifacts: Vec<ServiceOciArtifactEntry>,
 }
 impl FhirServiceAcrConfiguration {
@@ -347,7 +382,11 @@ pub struct FhirServiceCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Fhir Services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FhirService>,
 }
 impl azure_core::Continuable for FhirServiceCollection {
@@ -365,13 +404,25 @@ impl FhirServiceCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FhirServiceCorsConfiguration {
     #[doc = "The origins to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<CorsConfigurationOriginEntry>,
     #[doc = "The headers to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<CorsConfigurationHeaderEntry>,
     #[doc = "The methods to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub methods: Vec<CorsConfigurationMethodEntry>,
     #[doc = "The max age to be allowed via CORS."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -450,7 +501,12 @@ pub struct FhirServiceProperties {
     #[serde(rename = "exportConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub export_configuration: Option<FhirServiceExportConfiguration>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -496,7 +552,11 @@ pub struct IotConnectorCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of IoT Connectors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotConnector>,
 }
 impl azure_core::Continuable for IotConnectorCollection {
@@ -598,7 +658,11 @@ pub struct IotFhirDestinationCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of IoT Connector FHIR destinations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotFhirDestination>,
 }
 impl azure_core::Continuable for IotFhirDestinationCollection {
@@ -694,7 +758,11 @@ impl IotMappingProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -783,10 +851,20 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Optional. If set to true, then zero will be returned for time duration where no metric is emitted/published."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -795,7 +873,11 @@ pub struct MetricSpecification {
     #[serde(rename = "metricFilterPattern", default, skip_serializing_if = "Option::is_none")]
     pub metric_filter_pattern: Option<String>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Whether the metric is internal."]
     #[serde(rename = "isInternal", default, skip_serializing_if = "Option::is_none")]
@@ -1033,7 +1115,11 @@ impl PrivateEndpointConnectionDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -1045,7 +1131,11 @@ impl PrivateEndpointConnectionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResultDescription {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnectionDescription>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResultDescription {
@@ -1193,7 +1283,11 @@ impl PrivateLinkResourceDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResultDescription {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResourceDescription>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResultDescription {
@@ -1214,10 +1308,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1461,10 +1565,20 @@ impl ServiceAccessPolicyEntry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceAcrConfigurationInfo {
     #[doc = "The list of the ACR login servers."]
-    #[serde(rename = "loginServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_servers: Vec<String>,
     #[doc = "The list of Open Container Initiative (OCI) artifacts."]
-    #[serde(rename = "ociArtifacts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ociArtifacts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub oci_artifacts: Vec<ServiceOciArtifactEntry>,
 }
 impl ServiceAcrConfigurationInfo {
@@ -1495,13 +1609,25 @@ pub type ServiceCorsConfigurationHeaderEntry = String;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceCorsConfigurationInfo {
     #[doc = "The origins to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<ServiceCorsConfigurationOriginEntry>,
     #[doc = "The headers to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ServiceCorsConfigurationHeaderEntry>,
     #[doc = "The methods to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub methods: Vec<ServiceCorsConfigurationMethodEntry>,
     #[doc = "The max age to be allowed via CORS."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -1670,10 +1796,20 @@ impl ServiceOciArtifactEntry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -1709,7 +1845,11 @@ pub struct ServicesDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServicesDescription>,
 }
 impl azure_core::Continuable for ServicesDescriptionListResult {
@@ -1787,7 +1927,12 @@ pub struct ServicesProperties {
     #[serde(rename = "exportConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub export_configuration: Option<ServiceExportConfigurationInfo>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -2069,7 +2214,12 @@ pub mod workspace {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<ProvisioningState>,
         #[doc = "The list of private endpoint connections that are set up for this resource."]
-        #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "privateEndpointConnections",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
         #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
         #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -2088,7 +2238,11 @@ pub struct WorkspaceList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Collection of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
 }
 impl azure_core::Continuable for WorkspaceList {
diff --git a/services/mgmt/healthcareapis/src/package_preview_2021_06/models.rs b/services/mgmt/healthcareapis/src/package_preview_2021_06/models.rs
index a773568fb1..6847c4ad78 100644
--- a/services/mgmt/healthcareapis/src/package_preview_2021_06/models.rs
+++ b/services/mgmt/healthcareapis/src/package_preview_2021_06/models.rs
@@ -45,7 +45,11 @@ pub struct DicomServiceAuthenticationConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub authority: Option<String>,
     #[doc = "The audiences for the service"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audiences: Vec<DicomAudience>,
 }
 impl DicomServiceAuthenticationConfiguration {
@@ -60,7 +64,11 @@ pub struct DicomServiceCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Dicom Services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DicomService>,
 }
 impl azure_core::Continuable for DicomServiceCollection {
@@ -232,7 +240,12 @@ impl FhirServiceAccessPolicyEntry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FhirServiceAcrConfiguration {
     #[doc = "The list of the Azure container registry login servers."]
-    #[serde(rename = "loginServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_servers: Vec<String>,
 }
 impl FhirServiceAcrConfiguration {
@@ -265,7 +278,11 @@ pub struct FhirServiceCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Fhir Services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FhirService>,
 }
 impl azure_core::Continuable for FhirServiceCollection {
@@ -283,13 +300,25 @@ impl FhirServiceCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FhirServiceCorsConfiguration {
     #[doc = "The origins to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<CorsConfigurationOriginEntry>,
     #[doc = "The headers to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<CorsConfigurationHeaderEntry>,
     #[doc = "The methods to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub methods: Vec<CorsConfigurationMethodEntry>,
     #[doc = "The max age to be allowed via CORS."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -381,7 +410,11 @@ pub struct IotConnectorCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of IoT Connectors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotConnector>,
 }
 impl azure_core::Continuable for IotConnectorCollection {
@@ -483,7 +516,11 @@ pub struct IotFhirDestinationCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of IoT Connector FHIR destinations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotFhirDestination>,
 }
 impl azure_core::Continuable for IotFhirDestinationCollection {
@@ -579,7 +616,11 @@ impl IotMappingProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -807,7 +848,11 @@ impl PrivateEndpointConnectionDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResultDescription {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnectionDescription>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResultDescription {
@@ -955,7 +1000,11 @@ impl PrivateLinkResourceDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResultDescription {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResourceDescription>,
 }
 impl PrivateLinkResourceListResultDescription {
@@ -970,10 +1019,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1126,7 +1185,12 @@ impl ServiceAccessPolicyEntry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceAcrConfigurationInfo {
     #[doc = "The list of the ACR login servers."]
-    #[serde(rename = "loginServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_servers: Vec<String>,
 }
 impl ServiceAcrConfigurationInfo {
@@ -1157,13 +1221,25 @@ pub type ServiceCorsConfigurationHeaderEntry = String;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceCorsConfigurationInfo {
     #[doc = "The origins to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<ServiceCorsConfigurationOriginEntry>,
     #[doc = "The headers to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ServiceCorsConfigurationHeaderEntry>,
     #[doc = "The methods to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub methods: Vec<ServiceCorsConfigurationMethodEntry>,
     #[doc = "The max age to be allowed via CORS."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -1301,7 +1377,11 @@ pub struct ServicesDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServicesDescription>,
 }
 impl azure_core::Continuable for ServicesDescriptionListResult {
@@ -1379,7 +1459,12 @@ pub struct ServicesProperties {
     #[serde(rename = "exportConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub export_configuration: Option<ServiceExportConfigurationInfo>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -1699,7 +1784,11 @@ pub struct WorkspaceList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Collection of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
 }
 impl azure_core::Continuable for WorkspaceList {
diff --git a/services/mgmt/healthcareapis/src/package_preview_2022_01/models.rs b/services/mgmt/healthcareapis/src/package_preview_2022_01/models.rs
index 60bdaa9b05..64f419028d 100644
--- a/services/mgmt/healthcareapis/src/package_preview_2022_01/models.rs
+++ b/services/mgmt/healthcareapis/src/package_preview_2022_01/models.rs
@@ -47,7 +47,11 @@ pub struct DicomServiceAuthenticationConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub authority: Option<String>,
     #[doc = "The audiences for the service"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audiences: Vec<DicomAudience>,
 }
 impl DicomServiceAuthenticationConfiguration {
@@ -62,7 +66,11 @@ pub struct DicomServiceCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Dicom Services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DicomService>,
 }
 impl azure_core::Continuable for DicomServiceCollection {
@@ -102,7 +110,12 @@ pub struct DicomServiceProperties {
     #[serde(rename = "serviceUrl", default, skip_serializing_if = "Option::is_none")]
     pub service_url: Option<String>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -284,10 +297,20 @@ impl FhirServiceAccessPolicyEntry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FhirServiceAcrConfiguration {
     #[doc = "The list of the Azure container registry login servers."]
-    #[serde(rename = "loginServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_servers: Vec<String>,
     #[doc = "The list of Open Container Initiative (OCI) artifacts."]
-    #[serde(rename = "ociArtifacts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ociArtifacts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub oci_artifacts: Vec<ServiceOciArtifactEntry>,
 }
 impl FhirServiceAcrConfiguration {
@@ -320,7 +343,11 @@ pub struct FhirServiceCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Fhir Services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FhirService>,
 }
 impl azure_core::Continuable for FhirServiceCollection {
@@ -338,13 +365,25 @@ impl FhirServiceCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FhirServiceCorsConfiguration {
     #[doc = "The origins to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<CorsConfigurationOriginEntry>,
     #[doc = "The headers to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<CorsConfigurationHeaderEntry>,
     #[doc = "The methods to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub methods: Vec<CorsConfigurationMethodEntry>,
     #[doc = "The max age to be allowed via CORS."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -423,7 +462,12 @@ pub struct FhirServiceProperties {
     #[serde(rename = "exportConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub export_configuration: Option<FhirServiceExportConfiguration>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -469,7 +513,11 @@ pub struct IotConnectorCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of IoT Connectors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotConnector>,
 }
 impl azure_core::Continuable for IotConnectorCollection {
@@ -571,7 +619,11 @@ pub struct IotFhirDestinationCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of IoT Connector FHIR destinations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotFhirDestination>,
 }
 impl azure_core::Continuable for IotFhirDestinationCollection {
@@ -667,7 +719,11 @@ impl IotMappingProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -756,16 +812,30 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Optional. If set to true, then zero will be returned for time duration where no metric is emitted/published."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
     pub fill_gap_with_zero: Option<bool>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Name of the MDM namespace. Optional."]
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
@@ -991,7 +1061,11 @@ impl PrivateEndpointConnectionDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -1003,7 +1077,11 @@ impl PrivateEndpointConnectionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResultDescription {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnectionDescription>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResultDescription {
@@ -1151,7 +1229,11 @@ impl PrivateLinkResourceDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResultDescription {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResourceDescription>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResultDescription {
@@ -1172,10 +1254,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1419,10 +1511,20 @@ impl ServiceAccessPolicyEntry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceAcrConfigurationInfo {
     #[doc = "The list of the ACR login servers."]
-    #[serde(rename = "loginServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_servers: Vec<String>,
     #[doc = "The list of Open Container Initiative (OCI) artifacts."]
-    #[serde(rename = "ociArtifacts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ociArtifacts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub oci_artifacts: Vec<ServiceOciArtifactEntry>,
 }
 impl ServiceAcrConfigurationInfo {
@@ -1453,13 +1555,25 @@ pub type ServiceCorsConfigurationHeaderEntry = String;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceCorsConfigurationInfo {
     #[doc = "The origins to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<ServiceCorsConfigurationOriginEntry>,
     #[doc = "The headers to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ServiceCorsConfigurationHeaderEntry>,
     #[doc = "The methods to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub methods: Vec<ServiceCorsConfigurationMethodEntry>,
     #[doc = "The max age to be allowed via CORS."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -1628,10 +1742,20 @@ impl ServiceOciArtifactEntry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -1667,7 +1791,11 @@ pub struct ServicesDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServicesDescription>,
 }
 impl azure_core::Continuable for ServicesDescriptionListResult {
@@ -1745,7 +1873,12 @@ pub struct ServicesProperties {
     #[serde(rename = "exportConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub export_configuration: Option<ServiceExportConfigurationInfo>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -2027,7 +2160,12 @@ pub mod workspace {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<ProvisioningState>,
         #[doc = "The list of private endpoint connections that are set up for this resource."]
-        #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "privateEndpointConnections",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
         #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
         #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -2046,7 +2184,11 @@ pub struct WorkspaceList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Collection of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
 }
 impl azure_core::Continuable for WorkspaceList {
diff --git a/services/mgmt/hybridaks/src/package_2022_05_01_preview/models.rs b/services/mgmt/hybridaks/src/package_2022_05_01_preview/models.rs
index 86959edfe5..443aac912e 100644
--- a/services/mgmt/hybridaks/src/package_2022_05_01_preview/models.rs
+++ b/services/mgmt/hybridaks/src/package_2022_05_01_preview/models.rs
@@ -20,7 +20,12 @@ impl AadProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AadProfileResponse {
     #[doc = "The list of AAD group object IDs that will have admin role of the cluster."]
-    #[serde(rename = "adminGroupObjectIDs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "adminGroupObjectIDs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub admin_group_object_i_ds: Vec<String>,
     #[doc = "The client AAD application ID."]
     #[serde(rename = "clientAppID", default, skip_serializing_if = "Option::is_none")]
@@ -106,7 +111,12 @@ pub struct AgentPoolProfile {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub count: Option<i32>,
     #[doc = "AvailabilityZones - The list of Availability zones to use for nodes. Datacenter racks modelled as zones"]
-    #[serde(rename = "availabilityZones", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilityZones",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_zones: Vec<String>,
     #[doc = "The maximum number of nodes for auto-scaling"]
     #[serde(rename = "maxCount", default, skip_serializing_if = "Option::is_none")]
@@ -124,7 +134,12 @@ pub struct AgentPoolProfile {
     #[serde(rename = "nodeLabels", default, skip_serializing_if = "Option::is_none")]
     pub node_labels: Option<serde_json::Value>,
     #[doc = "NodeTaints - Taints added to new nodes during node pool create and scale. For example, key=value:NoSchedule."]
-    #[serde(rename = "nodeTaints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nodeTaints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_taints: Vec<String>,
     #[doc = "OsType - OsType to be used to specify os type. Choose from Linux and Windows. Default to Linux. Possible values include: 'Linux', 'Windows'"]
     #[serde(rename = "osType", default, skip_serializing_if = "Option::is_none")]
@@ -403,7 +418,12 @@ pub mod cloud_provider_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct InfraNetworkProfile {
         #[doc = "Array of references to azure resource corresponding to the new HybridAKSNetwork object e.g. /subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.HybridContainerService/virtualNetworks/{virtualNetworkName}"]
-        #[serde(rename = "vnetSubnetIds", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "vnetSubnetIds",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub vnet_subnet_ids: Vec<String>,
     }
     impl InfraNetworkProfile {
@@ -415,7 +435,12 @@ pub mod cloud_provider_profile {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct InfraStorageProfile {
         #[doc = "Reference to azure resource corresponding to the new HybridAKSStorage object e.g. /subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.HybridContainerService/storageSpaces/{storageSpaceName}"]
-        #[serde(rename = "storageSpaceIds", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "storageSpaceIds",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub storage_space_ids: Vec<String>,
     }
     impl InfraStorageProfile {
@@ -497,10 +522,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -559,7 +593,12 @@ pub mod linux_profile_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Ssh {
         #[doc = "PublicKeys - The list of SSH public keys used to authenticate with Linux-based VMs. Only expect one key specified."]
-        #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "publicKeys",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub public_keys: Vec<serde_json::Value>,
     }
     impl Ssh {
@@ -613,13 +652,23 @@ pub struct NetworkProfile {
     #[serde(rename = "podCidr", default, skip_serializing_if = "Option::is_none")]
     pub pod_cidr: Option<String>,
     #[doc = "The CIDR notation IP ranges from which to assign pod IPs. One IPv4 CIDR is expected for single-stack networking. Two CIDRs, one for each IP family (IPv4/IPv6), is expected for dual-stack networking."]
-    #[serde(rename = "podCidrs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "podCidrs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pod_cidrs: Vec<String>,
     #[doc = "ServiceCidr - A CIDR notation IP range from which to assign service cluster IPs. It must not overlap with any Subnet IP ranges."]
     #[serde(rename = "serviceCidr", default, skip_serializing_if = "Option::is_none")]
     pub service_cidr: Option<String>,
     #[doc = "The CIDR notation IP ranges from which to assign service cluster IPs. One IPv4 CIDR is expected for single-stack networking. Two CIDRs, one for each IP family (IPv4/IPv6), is expected for dual-stack networking. They must not overlap with any Subnet IP ranges."]
-    #[serde(rename = "serviceCidrs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceCidrs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_cidrs: Vec<String>,
 }
 impl NetworkProfile {
@@ -758,7 +807,11 @@ pub struct OrchestratorVersionProfile {
     #[serde(rename = "orchestratorVersion", default, skip_serializing_if = "Option::is_none")]
     pub orchestrator_version: Option<String>,
     #[doc = "The list of available upgrade versions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upgrades: Vec<OrchestratorProfile>,
 }
 impl OrchestratorVersionProfile {
@@ -770,7 +823,11 @@ impl OrchestratorVersionProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OrchestratorVersionProfileListResult {
     #[doc = "Profile of the orchestrator versions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub orchestrators: Vec<OrchestratorVersionProfile>,
     #[doc = "Resource Id"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -861,7 +918,11 @@ pub mod resource_provider_operation {
 #[doc = "Results of the request to list operations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -901,7 +962,12 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmSkuListResult {
     #[doc = "Supported VM SKUs."]
-    #[serde(rename = "vmSKUs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSKUs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_sk_us: Vec<String>,
     #[doc = "Resource Id"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1052,7 +1118,11 @@ pub mod agent_pool {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentPoolListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AgentPool>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1224,7 +1294,12 @@ pub struct HttpProxyConfigResponse {
     #[serde(rename = "httpsProxy", default, skip_serializing_if = "Option::is_none")]
     pub https_proxy: Option<String>,
     #[doc = "The endpoints that should not go through proxy."]
-    #[serde(rename = "noProxy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "noProxy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub no_proxy: Vec<String>,
     #[doc = "Alternative CA cert to use for connecting to proxy servers."]
     #[serde(rename = "trustedCa", default, skip_serializing_if = "Option::is_none")]
@@ -1416,7 +1491,12 @@ pub struct ProvisionedClustersCommonProperties {
     #[serde(rename = "nodeResourceGroup", default, skip_serializing_if = "Option::is_none")]
     pub node_resource_group: Option<String>,
     #[doc = "The agent pools of the cluster."]
-    #[serde(rename = "agentPoolProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentPoolProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_pool_profiles: Vec<NamedAgentPoolProfile>,
     #[doc = "CloudProviderProfile - The underlying cloud infra provider properties."]
     #[serde(rename = "cloudProviderProfile", default, skip_serializing_if = "Option::is_none")]
@@ -1658,7 +1738,11 @@ pub mod provisioned_clusters_response {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProvisionedClustersResponseListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProvisionedClustersResponse>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1729,7 +1813,11 @@ pub mod storage_spaces {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageSpacesListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageSpaces>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -2066,7 +2154,11 @@ pub mod virtual_networks {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworksListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworks>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -2100,16 +2192,36 @@ pub struct VirtualNetworksProperties {
     #[serde(rename = "infraVnetProfile", default, skip_serializing_if = "Option::is_none")]
     pub infra_vnet_profile: Option<virtual_networks_properties::InfraVnetProfile>,
     #[doc = "Virtual IP Pool for Kubernetes"]
-    #[serde(rename = "vipPool", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vipPool",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vip_pool: Vec<serde_json::Value>,
     #[doc = "IP Pool for Virtual Machines"]
-    #[serde(rename = "vmipPool", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmipPool",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vmip_pool: Vec<serde_json::Value>,
     #[doc = "Address of the DHCP servers associated with the network"]
-    #[serde(rename = "dhcpServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dhcpServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dhcp_servers: Vec<String>,
     #[doc = "Address of the DNS servers associated with the network"]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
     #[doc = "Address of the Gateway associated with the network"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/hybridcompute/src/package_preview_2021_04/models.rs b/services/mgmt/hybridcompute/src/package_preview_2021_04/models.rs
index 32c7d3b4dc..78c036a348 100644
--- a/services/mgmt/hybridcompute/src/package_preview_2021_04/models.rs
+++ b/services/mgmt/hybridcompute/src/package_preview_2021_04/models.rs
@@ -62,10 +62,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -428,7 +437,11 @@ impl MachineExtensionUpgrade {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MachineExtensionsListResult {
     #[doc = "The list of extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MachineExtension>,
     #[doc = "The uri to fetch the next page of machine extensions. Call ListNext() with this to fetch the next page of extensions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -484,7 +497,12 @@ pub struct MachineProperties {
     #[serde(rename = "lastStatusChange", default, with = "azure_core::date::rfc3339::option")]
     pub last_status_change: Option<time::OffsetDateTime>,
     #[doc = "Details about the error state."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<ErrorDetail>,
     #[doc = "The hybrid machine agent full version."]
     #[serde(rename = "agentVersion", default, skip_serializing_if = "Option::is_none")]
@@ -511,7 +529,11 @@ pub struct MachineProperties {
     #[serde(rename = "vmUuid", default, skip_serializing_if = "Option::is_none")]
     pub vm_uuid: Option<String>,
     #[doc = "Machine Extensions information"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<MachineExtensionInstanceView>,
     #[doc = "Specifies the Operating System product SKU."]
     #[serde(rename = "osSku", default, skip_serializing_if = "Option::is_none")]
@@ -633,7 +655,11 @@ impl OsProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of compute operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationValue>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -707,7 +733,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -775,7 +805,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -799,10 +833,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -819,7 +863,12 @@ pub struct PrivateLinkScopeValidationDetails {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<PublicNetworkAccessType>,
     #[doc = "List of Private Endpoint Connection details."]
-    #[serde(rename = "connectionDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_details: Vec<ConnectionDetail>,
 }
 impl PrivateLinkScopeValidationDetails {
diff --git a/services/mgmt/hybridcompute/src/package_preview_2021_05/models.rs b/services/mgmt/hybridcompute/src/package_preview_2021_05/models.rs
index 4f98427c6d..63b62caefe 100644
--- a/services/mgmt/hybridcompute/src/package_preview_2021_05/models.rs
+++ b/services/mgmt/hybridcompute/src/package_preview_2021_05/models.rs
@@ -62,10 +62,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -165,7 +174,12 @@ pub struct HybridComputePrivateLinkScopeProperties {
     #[serde(rename = "privateLinkScopeId", default, skip_serializing_if = "Option::is_none")]
     pub private_link_scope_id: Option<String>,
     #[doc = "The collection of associated Private Endpoint Connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionDataModel>,
 }
 impl HybridComputePrivateLinkScopeProperties {
@@ -431,7 +445,11 @@ impl MachineExtensionUpgrade {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MachineExtensionsListResult {
     #[doc = "The list of extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MachineExtension>,
     #[doc = "The uri to fetch the next page of machine extensions. Call ListNext() with this to fetch the next page of extensions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -487,7 +505,12 @@ pub struct MachineProperties {
     #[serde(rename = "lastStatusChange", default, with = "azure_core::date::rfc3339::option")]
     pub last_status_change: Option<time::OffsetDateTime>,
     #[doc = "Details about the error state."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<ErrorDetail>,
     #[doc = "The hybrid machine agent full version."]
     #[serde(rename = "agentVersion", default, skip_serializing_if = "Option::is_none")]
@@ -514,7 +537,11 @@ pub struct MachineProperties {
     #[serde(rename = "vmUuid", default, skip_serializing_if = "Option::is_none")]
     pub vm_uuid: Option<String>,
     #[doc = "Machine Extensions information"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<MachineExtensionInstanceView>,
     #[doc = "Specifies the Operating System product SKU."]
     #[serde(rename = "osSku", default, skip_serializing_if = "Option::is_none")]
@@ -636,7 +663,11 @@ impl OsProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of compute operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationValue>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -731,7 +762,11 @@ impl PrivateEndpointConnectionDataModel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -799,7 +834,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -823,10 +862,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -843,7 +892,12 @@ pub struct PrivateLinkScopeValidationDetails {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<PublicNetworkAccessType>,
     #[doc = "List of Private Endpoint Connection details."]
-    #[serde(rename = "connectionDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_details: Vec<ConnectionDetail>,
 }
 impl PrivateLinkScopeValidationDetails {
diff --git a/services/mgmt/hybridcompute/src/package_preview_2021_06/models.rs b/services/mgmt/hybridcompute/src/package_preview_2021_06/models.rs
index 28b8ea2f35..af068c4b47 100644
--- a/services/mgmt/hybridcompute/src/package_preview_2021_06/models.rs
+++ b/services/mgmt/hybridcompute/src/package_preview_2021_06/models.rs
@@ -62,10 +62,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -165,7 +174,12 @@ pub struct HybridComputePrivateLinkScopeProperties {
     #[serde(rename = "privateLinkScopeId", default, skip_serializing_if = "Option::is_none")]
     pub private_link_scope_id: Option<String>,
     #[doc = "The collection of associated Private Endpoint Connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionDataModel>,
 }
 impl HybridComputePrivateLinkScopeProperties {
@@ -431,7 +445,11 @@ impl MachineExtensionUpgrade {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MachineExtensionsListResult {
     #[doc = "The list of extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MachineExtension>,
     #[doc = "The uri to fetch the next page of machine extensions. Call ListNext() with this to fetch the next page of extensions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -487,7 +505,12 @@ pub struct MachineProperties {
     #[serde(rename = "lastStatusChange", default, with = "azure_core::date::rfc3339::option")]
     pub last_status_change: Option<time::OffsetDateTime>,
     #[doc = "Details about the error state."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<ErrorDetail>,
     #[doc = "The hybrid machine agent full version."]
     #[serde(rename = "agentVersion", default, skip_serializing_if = "Option::is_none")]
@@ -517,7 +540,11 @@ pub struct MachineProperties {
     #[serde(rename = "vmUuid", default, skip_serializing_if = "Option::is_none")]
     pub vm_uuid: Option<String>,
     #[doc = "Machine Extensions information"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<MachineExtensionInstanceView>,
     #[doc = "Specifies the Operating System product SKU."]
     #[serde(rename = "osSku", default, skip_serializing_if = "Option::is_none")]
@@ -678,7 +705,11 @@ pub mod os_profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of compute operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationValue>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -785,7 +816,11 @@ impl PrivateEndpointConnectionDataModel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -853,7 +888,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -877,10 +916,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -897,7 +946,12 @@ pub struct PrivateLinkScopeValidationDetails {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<PublicNetworkAccessType>,
     #[doc = "List of Private Endpoint Connection details."]
-    #[serde(rename = "connectionDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_details: Vec<ConnectionDetail>,
 }
 impl PrivateLinkScopeValidationDetails {
diff --git a/services/mgmt/hybridcompute/src/package_preview_2021_12/models.rs b/services/mgmt/hybridcompute/src/package_preview_2021_12/models.rs
index 3ac41867ae..27ae6529ce 100644
--- a/services/mgmt/hybridcompute/src/package_preview_2021_12/models.rs
+++ b/services/mgmt/hybridcompute/src/package_preview_2021_12/models.rs
@@ -10,7 +10,12 @@ pub struct AgentConfiguration {
     #[serde(rename = "proxyUrl", default, skip_serializing_if = "Option::is_none")]
     pub proxy_url: Option<String>,
     #[doc = "Specifies the list of ports that the agent will be able to listen on."]
-    #[serde(rename = "incomingConnectionsPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "incomingConnectionsPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub incoming_connections_ports: Vec<String>,
 }
 impl AgentConfiguration {
@@ -89,10 +94,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -192,7 +206,12 @@ pub struct HybridComputePrivateLinkScopeProperties {
     #[serde(rename = "privateLinkScopeId", default, skip_serializing_if = "Option::is_none")]
     pub private_link_scope_id: Option<String>,
     #[doc = "The collection of associated Private Endpoint Connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionDataModel>,
 }
 impl HybridComputePrivateLinkScopeProperties {
@@ -461,7 +480,11 @@ impl MachineExtensionUpgrade {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MachineExtensionsListResult {
     #[doc = "The list of extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MachineExtension>,
     #[doc = "The uri to fetch the next page of machine extensions. Call ListNext() with this to fetch the next page of extensions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -523,7 +546,12 @@ pub struct MachineProperties {
     #[serde(rename = "lastStatusChange", default, with = "azure_core::date::rfc3339::option")]
     pub last_status_change: Option<time::OffsetDateTime>,
     #[doc = "Details about the error state."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<ErrorDetail>,
     #[doc = "The hybrid machine agent full version."]
     #[serde(rename = "agentVersion", default, skip_serializing_if = "Option::is_none")]
@@ -553,7 +581,11 @@ pub struct MachineProperties {
     #[serde(rename = "vmUuid", default, skip_serializing_if = "Option::is_none")]
     pub vm_uuid: Option<String>,
     #[doc = "Machine Extensions information"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<MachineExtensionInstanceView>,
     #[doc = "Specifies the Operating System product SKU."]
     #[serde(rename = "osSku", default, skip_serializing_if = "Option::is_none")]
@@ -717,7 +749,11 @@ pub mod os_profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of compute operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationValue>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -827,7 +863,11 @@ impl PrivateEndpointConnectionDataModel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -895,7 +935,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -919,10 +963,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -939,7 +993,12 @@ pub struct PrivateLinkScopeValidationDetails {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<PublicNetworkAccessType>,
     #[doc = "List of Private Endpoint Connection details."]
-    #[serde(rename = "connectionDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_details: Vec<ConnectionDetail>,
 }
 impl PrivateLinkScopeValidationDetails {
diff --git a/services/mgmt/hybridcompute/src/package_preview_2022_05/models.rs b/services/mgmt/hybridcompute/src/package_preview_2022_05/models.rs
index ef61a0183f..8cf2037be4 100644
--- a/services/mgmt/hybridcompute/src/package_preview_2022_05/models.rs
+++ b/services/mgmt/hybridcompute/src/package_preview_2022_05/models.rs
@@ -10,16 +10,36 @@ pub struct AgentConfiguration {
     #[serde(rename = "proxyUrl", default, skip_serializing_if = "Option::is_none")]
     pub proxy_url: Option<String>,
     #[doc = "Specifies the list of ports that the agent will be able to listen on."]
-    #[serde(rename = "incomingConnectionsPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "incomingConnectionsPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub incoming_connections_ports: Vec<String>,
     #[doc = "Array of extensions that are allowed to be installed or updated."]
-    #[serde(rename = "extensionsAllowList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extensionsAllowList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions_allow_list: Vec<ConfigurationExtension>,
     #[doc = "Array of extensions that are blocked (cannot be installed or updated)"]
-    #[serde(rename = "extensionsBlockList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extensionsBlockList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions_block_list: Vec<ConfigurationExtension>,
     #[doc = "List of service names which should not use the specified proxy server."]
-    #[serde(rename = "proxyBypass", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "proxyBypass",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub proxy_bypass: Vec<String>,
     #[doc = "Specifies whether the extension service is enabled or disabled."]
     #[serde(rename = "extensionsEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -164,10 +184,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -267,7 +296,12 @@ pub struct HybridComputePrivateLinkScopeProperties {
     #[serde(rename = "privateLinkScopeId", default, skip_serializing_if = "Option::is_none")]
     pub private_link_scope_id: Option<String>,
     #[doc = "The collection of associated Private Endpoint Connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionDataModel>,
 }
 impl HybridComputePrivateLinkScopeProperties {
@@ -310,7 +344,11 @@ pub struct Machine {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<MachineProperties>,
     #[doc = "The list of extensions affiliated to the machine"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<MachineExtension>,
     #[doc = "Identity for the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -543,7 +581,11 @@ impl MachineExtensionUpgrade {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MachineExtensionsListResult {
     #[doc = "The list of extensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MachineExtension>,
     #[doc = "The uri to fetch the next page of machine extensions. Call ListNext() with this to fetch the next page of extensions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -608,7 +650,12 @@ pub struct MachineProperties {
     #[serde(rename = "lastStatusChange", default, with = "azure_core::date::rfc3339::option")]
     pub last_status_change: Option<time::OffsetDateTime>,
     #[doc = "Details about the error state."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<ErrorDetail>,
     #[doc = "The hybrid machine agent full version."]
     #[serde(rename = "agentVersion", default, skip_serializing_if = "Option::is_none")]
@@ -799,7 +846,11 @@ pub mod os_profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of compute operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationValue>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -994,7 +1045,11 @@ impl PrivateEndpointConnectionDataModel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1024,7 +1079,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "List of group IDs."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
 }
 impl PrivateEndpointConnectionProperties {
@@ -1065,7 +1125,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1089,10 +1153,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1109,7 +1183,12 @@ pub struct PrivateLinkScopeValidationDetails {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<PublicNetworkAccessType>,
     #[doc = "List of Private Endpoint Connection details."]
-    #[serde(rename = "connectionDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_details: Vec<ConnectionDetail>,
 }
 impl PrivateLinkScopeValidationDetails {
diff --git a/services/mgmt/hybridconnectivity/src/package_2021_10_06_preview/models.rs b/services/mgmt/hybridconnectivity/src/package_2021_10_06_preview/models.rs
index 7eb4879678..b6baa1763f 100644
--- a/services/mgmt/hybridconnectivity/src/package_2021_10_06_preview/models.rs
+++ b/services/mgmt/hybridconnectivity/src/package_2021_10_06_preview/models.rs
@@ -102,7 +102,11 @@ pub struct EndpointsList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of endpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EndpointResource>,
 }
 impl azure_core::Continuable for EndpointsList {
@@ -144,10 +148,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -302,7 +315,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/hybridconnectivity/src/package_2022_05_01_preview/models.rs b/services/mgmt/hybridconnectivity/src/package_2022_05_01_preview/models.rs
index f860244f82..7b839d768b 100644
--- a/services/mgmt/hybridconnectivity/src/package_2022_05_01_preview/models.rs
+++ b/services/mgmt/hybridconnectivity/src/package_2022_05_01_preview/models.rs
@@ -118,7 +118,11 @@ pub struct EndpointsList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of endpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EndpointResource>,
 }
 impl azure_core::Continuable for EndpointsList {
@@ -160,10 +164,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -375,7 +388,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/hybriddatamanager/src/package_2016_06/models.rs b/services/mgmt/hybriddatamanager/src/package_2016_06/models.rs
index ef0c96a3d8..c1271a0b10 100644
--- a/services/mgmt/hybriddatamanager/src/package_2016_06/models.rs
+++ b/services/mgmt/hybriddatamanager/src/package_2016_06/models.rs
@@ -61,7 +61,11 @@ impl AvailableProviderOperationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableProviderOperations {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableProviderOperation>,
     #[doc = "Link for the next set of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -130,7 +134,11 @@ impl DataManager {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataManagerList {
     #[doc = "List of data manager resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataManager>,
     #[doc = "Link for the next set of data stores."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -182,7 +190,11 @@ impl DataService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataServiceList {
     #[doc = "List of data services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataService>,
     #[doc = "Link for the next set of data services."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -205,10 +217,20 @@ pub struct DataServiceProperties {
     #[doc = "State of the data service."]
     pub state: data_service_properties::State,
     #[doc = "Supported data store types which can be used as a sink."]
-    #[serde(rename = "supportedDataSinkTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedDataSinkTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_data_sink_types: Vec<String>,
     #[doc = "Supported data store types which can be used as a source."]
-    #[serde(rename = "supportedDataSourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedDataSourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_data_source_types: Vec<String>,
 }
 impl DataServiceProperties {
@@ -262,7 +284,11 @@ impl DataStoreFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataStoreList {
     #[doc = "List of data stores."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataStore>,
     #[doc = "Link for the next set of data stores."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -294,7 +320,12 @@ pub struct DataStoreProperties {
     #[serde(rename = "dataStoreTypeId")]
     pub data_store_type_id: String,
     #[doc = "List of customer secrets containing a key identifier and key value. The key identifier is a way for the specific data source to understand the key. Value contains customer secret encrypted by the encryptionKeys."]
-    #[serde(rename = "customerSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customerSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customer_secrets: Vec<CustomerSecret>,
 }
 impl DataStoreProperties {
@@ -338,7 +369,11 @@ impl DataStoreType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataStoreTypeList {
     #[doc = "List of DataStoreType."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataStoreType>,
     #[doc = "Link for the next set of data store types."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -364,10 +399,20 @@ pub struct DataStoreTypeProperties {
     #[doc = "State of the data store type."]
     pub state: data_store_type_properties::State,
     #[doc = "Supported data services where it can be used as a sink."]
-    #[serde(rename = "supportedDataServicesAsSink", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedDataServicesAsSink",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_data_services_as_sink: Vec<String>,
     #[doc = "Supported data services where it can be used as a source."]
-    #[serde(rename = "supportedDataServicesAsSource", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedDataServicesAsSource",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_data_services_as_source: Vec<String>,
 }
 impl DataStoreTypeProperties {
@@ -539,7 +584,11 @@ pub mod job_definition_filter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobDefinitionList {
     #[doc = "List of job definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobDefinition>,
     #[doc = "Link for the next set of job definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -566,7 +615,11 @@ pub struct JobDefinitionProperties {
     #[serde(rename = "dataSinkId")]
     pub data_sink_id: String,
     #[doc = "Schedule for running the job definition"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedules: Vec<Schedule>,
     #[doc = "State of the job definition."]
     pub state: job_definition_properties::State,
@@ -583,7 +636,12 @@ pub struct JobDefinitionProperties {
     #[serde(rename = "dataServiceInput", default, skip_serializing_if = "Option::is_none")]
     pub data_service_input: Option<serde_json::Value>,
     #[doc = "List of customer secrets containing a key identifier and key value. The key identifier is a way for the specific data source to understand the key. Value contains customer secret encrypted by the encryptionKeys."]
-    #[serde(rename = "customerSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customerSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customer_secrets: Vec<CustomerSecret>,
 }
 impl JobDefinitionProperties {
@@ -684,13 +742,23 @@ pub mod job_definition_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobDetails {
     #[doc = "List of stages that ran in the job"]
-    #[serde(rename = "jobStages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobStages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_stages: Vec<JobStages>,
     #[doc = "Job Definition."]
     #[serde(rename = "jobDefinition", default, skip_serializing_if = "Option::is_none")]
     pub job_definition: Option<JobDefinition>,
     #[doc = "Error details for failure. This is optional."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<ErrorDetails>,
     #[doc = "Item Details Link to download files or see details"]
     #[serde(rename = "itemDetailsLink", default, skip_serializing_if = "Option::is_none")]
@@ -733,7 +801,11 @@ pub mod job_filter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobList {
     #[doc = "List of jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "Link for the next set of jobs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -814,7 +886,12 @@ pub struct JobStages {
     #[serde(rename = "jobStageDetails", default, skip_serializing_if = "Option::is_none")]
     pub job_stage_details: Option<serde_json::Value>,
     #[doc = "Error details for the stage. This is optional"]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<ErrorDetails>,
 }
 impl JobStages {
@@ -883,7 +960,11 @@ impl PublicKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PublicKeyList {
     #[doc = "List of public keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PublicKey>,
     #[doc = "Link for the next set of public keys."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -961,7 +1042,12 @@ pub struct RunParameters {
     #[serde(rename = "dataServiceInput", default, skip_serializing_if = "Option::is_none")]
     pub data_service_input: Option<serde_json::Value>,
     #[doc = "List of customer secrets containing a key identifier and key value. The key identifier is a way for the specific data source to understand the key. Value contains customer secret encrypted by the encryptionKeys."]
-    #[serde(rename = "customerSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customerSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customer_secrets: Vec<CustomerSecret>,
 }
 impl RunParameters {
@@ -990,7 +1076,12 @@ pub struct Schedule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of repetition intervals in ISO 8601 format."]
-    #[serde(rename = "policyList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_list: Vec<String>,
 }
 impl Schedule {
diff --git a/services/mgmt/hybriddatamanager/src/package_2019_06/models.rs b/services/mgmt/hybriddatamanager/src/package_2019_06/models.rs
index 81b080341f..82d352d6aa 100644
--- a/services/mgmt/hybriddatamanager/src/package_2019_06/models.rs
+++ b/services/mgmt/hybriddatamanager/src/package_2019_06/models.rs
@@ -61,7 +61,11 @@ impl AvailableProviderOperationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableProviderOperations {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableProviderOperation>,
     #[doc = "Link for the next set of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -130,7 +134,11 @@ impl DataManager {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataManagerList {
     #[doc = "List of data manager resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataManager>,
     #[doc = "Link for the next set of data stores."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -182,7 +190,11 @@ impl DataService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataServiceList {
     #[doc = "List of data services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataService>,
     #[doc = "Link for the next set of data services."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -205,10 +217,20 @@ pub struct DataServiceProperties {
     #[doc = "State of the data service."]
     pub state: data_service_properties::State,
     #[doc = "Supported data store types which can be used as a sink."]
-    #[serde(rename = "supportedDataSinkTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedDataSinkTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_data_sink_types: Vec<String>,
     #[doc = "Supported data store types which can be used as a source."]
-    #[serde(rename = "supportedDataSourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedDataSourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_data_source_types: Vec<String>,
 }
 impl DataServiceProperties {
@@ -262,7 +284,11 @@ impl DataStoreFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataStoreList {
     #[doc = "List of data stores."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataStore>,
     #[doc = "Link for the next set of data stores."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -294,7 +320,12 @@ pub struct DataStoreProperties {
     #[serde(rename = "dataStoreTypeId")]
     pub data_store_type_id: String,
     #[doc = "List of customer secrets containing a key identifier and key value. The key identifier is a way for the specific data source to understand the key. Value contains customer secret encrypted by the encryptionKeys."]
-    #[serde(rename = "customerSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customerSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customer_secrets: Vec<CustomerSecret>,
 }
 impl DataStoreProperties {
@@ -338,7 +369,11 @@ impl DataStoreType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataStoreTypeList {
     #[doc = "List of DataStoreType."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataStoreType>,
     #[doc = "Link for the next set of data store types."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -364,10 +399,20 @@ pub struct DataStoreTypeProperties {
     #[doc = "State of the data store type."]
     pub state: data_store_type_properties::State,
     #[doc = "Supported data services where it can be used as a sink."]
-    #[serde(rename = "supportedDataServicesAsSink", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedDataServicesAsSink",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_data_services_as_sink: Vec<String>,
     #[doc = "Supported data services where it can be used as a source."]
-    #[serde(rename = "supportedDataServicesAsSource", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedDataServicesAsSource",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_data_services_as_source: Vec<String>,
 }
 impl DataStoreTypeProperties {
@@ -540,7 +585,11 @@ pub mod job_definition_filter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobDefinitionList {
     #[doc = "List of job definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobDefinition>,
     #[doc = "Link for the next set of job definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -567,7 +616,11 @@ pub struct JobDefinitionProperties {
     #[serde(rename = "dataSinkId")]
     pub data_sink_id: String,
     #[doc = "Schedule for running the job definition"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedules: Vec<Schedule>,
     #[doc = "State of the job definition."]
     pub state: job_definition_properties::State,
@@ -584,7 +637,12 @@ pub struct JobDefinitionProperties {
     #[serde(rename = "dataServiceInput", default, skip_serializing_if = "Option::is_none")]
     pub data_service_input: Option<serde_json::Value>,
     #[doc = "List of customer secrets containing a key identifier and key value. The key identifier is a way for the specific data source to understand the key. Value contains customer secret encrypted by the encryptionKeys."]
-    #[serde(rename = "customerSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customerSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customer_secrets: Vec<CustomerSecret>,
 }
 impl JobDefinitionProperties {
@@ -685,13 +743,23 @@ pub mod job_definition_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobDetails {
     #[doc = "List of stages that ran in the job"]
-    #[serde(rename = "jobStages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobStages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_stages: Vec<JobStages>,
     #[doc = "Job Definition."]
     #[serde(rename = "jobDefinition", default, skip_serializing_if = "Option::is_none")]
     pub job_definition: Option<JobDefinition>,
     #[doc = "Error details for failure. This is optional."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<ErrorDetails>,
     #[doc = "Item Details Link to download files or see details"]
     #[serde(rename = "itemDetailsLink", default, skip_serializing_if = "Option::is_none")]
@@ -735,7 +803,11 @@ pub mod job_filter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobList {
     #[doc = "List of jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "Link for the next set of jobs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -816,7 +888,12 @@ pub struct JobStages {
     #[serde(rename = "jobStageDetails", default, skip_serializing_if = "Option::is_none")]
     pub job_stage_details: Option<serde_json::Value>,
     #[doc = "Error details for the stage. This is optional"]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<ErrorDetails>,
 }
 impl JobStages {
@@ -886,7 +963,11 @@ impl PublicKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PublicKeyList {
     #[doc = "List of public keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PublicKey>,
     #[doc = "Link for the next set of public keys."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -964,7 +1045,12 @@ pub struct RunParameters {
     #[serde(rename = "dataServiceInput", default, skip_serializing_if = "Option::is_none")]
     pub data_service_input: Option<serde_json::Value>,
     #[doc = "List of customer secrets containing a key identifier and key value. The key identifier is a way for the specific data source to understand the key. Value contains customer secret encrypted by the encryptionKeys."]
-    #[serde(rename = "customerSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customerSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customer_secrets: Vec<CustomerSecret>,
 }
 impl RunParameters {
@@ -993,7 +1079,12 @@ pub struct Schedule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of repetition intervals in ISO 8601 format."]
-    #[serde(rename = "policyList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_list: Vec<String>,
 }
 impl Schedule {
diff --git a/services/mgmt/hybridkubernetes/src/package_2020_01_01_preview/models.rs b/services/mgmt/hybridkubernetes/src/package_2020_01_01_preview/models.rs
index bdff1c494c..1b0baa0fc9 100644
--- a/services/mgmt/hybridkubernetes/src/package_2020_01_01_preview/models.rs
+++ b/services/mgmt/hybridkubernetes/src/package_2020_01_01_preview/models.rs
@@ -146,7 +146,11 @@ pub mod connected_cluster_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectedClusterList {
     #[doc = "The list of connected clusters"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectedCluster>,
     #[doc = "The link to fetch the next page of connected cluster"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -369,7 +373,11 @@ pub struct CredentialResults {
     #[serde(rename = "hybridConnectionConfig", default, skip_serializing_if = "Option::is_none")]
     pub hybrid_connection_config: Option<HybridConnectionConfig>,
     #[doc = "Base64-encoded Kubernetes configuration file."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kubeconfigs: Vec<CredentialResult>,
 }
 impl CredentialResults {
@@ -405,10 +413,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -498,7 +515,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "The list of connected cluster API operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link to fetch the next page of connected cluster API operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/hybridkubernetes/src/package_2021_03_01/models.rs b/services/mgmt/hybridkubernetes/src/package_2021_03_01/models.rs
index dc811f74aa..8824dc95f5 100644
--- a/services/mgmt/hybridkubernetes/src/package_2021_03_01/models.rs
+++ b/services/mgmt/hybridkubernetes/src/package_2021_03_01/models.rs
@@ -66,7 +66,11 @@ pub mod connected_cluster_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectedClusterList {
     #[doc = "The list of connected clusters"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectedCluster>,
     #[doc = "The link to fetch the next page of connected cluster"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -287,10 +291,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -359,7 +372,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "The list of connected cluster API operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link to fetch the next page of connected cluster API operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/hybridkubernetes/src/package_2021_04_01_preview/models.rs b/services/mgmt/hybridkubernetes/src/package_2021_04_01_preview/models.rs
index a95ee54f70..eadcb26b23 100644
--- a/services/mgmt/hybridkubernetes/src/package_2021_04_01_preview/models.rs
+++ b/services/mgmt/hybridkubernetes/src/package_2021_04_01_preview/models.rs
@@ -66,7 +66,11 @@ pub mod connected_cluster_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectedClusterList {
     #[doc = "The list of connected clusters"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectedCluster>,
     #[doc = "The link to fetch the next page of connected cluster"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -378,7 +382,11 @@ pub struct CredentialResults {
     #[serde(rename = "hybridConnectionConfig", default, skip_serializing_if = "Option::is_none")]
     pub hybrid_connection_config: Option<HybridConnectionConfig>,
     #[doc = "Base64-encoded Kubernetes configuration file."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kubeconfigs: Vec<CredentialResult>,
 }
 impl CredentialResults {
@@ -414,10 +422,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -566,7 +583,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "The list of connected cluster API operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link to fetch the next page of connected cluster API operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/hybridkubernetes/src/package_2021_10_01/models.rs b/services/mgmt/hybridkubernetes/src/package_2021_10_01/models.rs
index db2e60d434..5b0c77bdcf 100644
--- a/services/mgmt/hybridkubernetes/src/package_2021_10_01/models.rs
+++ b/services/mgmt/hybridkubernetes/src/package_2021_10_01/models.rs
@@ -66,7 +66,11 @@ pub mod connected_cluster_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectedClusterList {
     #[doc = "The list of connected clusters"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectedCluster>,
     #[doc = "The link to fetch the next page of connected cluster"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -281,7 +285,11 @@ pub struct CredentialResults {
     #[serde(rename = "hybridConnectionConfig", default, skip_serializing_if = "Option::is_none")]
     pub hybrid_connection_config: Option<HybridConnectionConfig>,
     #[doc = "Base64-encoded Kubernetes configuration file."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kubeconfigs: Vec<CredentialResult>,
 }
 impl CredentialResults {
@@ -317,10 +325,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -469,7 +486,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "The list of connected cluster API operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link to fetch the next page of connected cluster API operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/hybridkubernetes/src/package_2022_05_01_preview/models.rs b/services/mgmt/hybridkubernetes/src/package_2022_05_01_preview/models.rs
index 0fde19d035..21ea63d982 100644
--- a/services/mgmt/hybridkubernetes/src/package_2022_05_01_preview/models.rs
+++ b/services/mgmt/hybridkubernetes/src/package_2022_05_01_preview/models.rs
@@ -66,7 +66,11 @@ pub mod connected_cluster_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectedClusterList {
     #[doc = "The list of connected clusters"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectedCluster>,
     #[doc = "The link to fetch the next page of connected cluster"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -331,7 +335,11 @@ pub struct CredentialResults {
     #[serde(rename = "hybridConnectionConfig", default, skip_serializing_if = "Option::is_none")]
     pub hybrid_connection_config: Option<HybridConnectionConfig>,
     #[doc = "Base64-encoded Kubernetes configuration file."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kubeconfigs: Vec<CredentialResult>,
 }
 impl CredentialResults {
@@ -367,10 +375,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -519,7 +536,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "The list of connected cluster API operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link to fetch the next page of connected cluster API operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/hybridnetwork/src/package_2020_01_01_preview/models.rs b/services/mgmt/hybridnetwork/src/package_2020_01_01_preview/models.rs
index d904517ffa..f12c759f97 100644
--- a/services/mgmt/hybridnetwork/src/package_2020_01_01_preview/models.rs
+++ b/services/mgmt/hybridnetwork/src/package_2020_01_01_preview/models.rs
@@ -111,7 +111,11 @@ impl Device {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeviceListResult {
     #[doc = "A list of devices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Device>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -141,7 +145,12 @@ pub struct DevicePropertiesFormat {
     #[serde(rename = "deviceType")]
     pub device_type: device_properties_format::DeviceType,
     #[doc = "The list of network functions deployed on the device."]
-    #[serde(rename = "networkFunctions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkFunctions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_functions: Vec<SubResource>,
 }
 impl DevicePropertiesFormat {
@@ -275,10 +284,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -373,7 +391,11 @@ impl NetworkFunction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkFunctionListResult {
     #[doc = "A list of network function resources in a subscription or resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkFunction>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -421,7 +443,12 @@ pub struct NetworkFunctionPropertiesFormat {
     #[serde(rename = "managedApplicationParameters", default, skip_serializing_if = "Option::is_none")]
     pub managed_application_parameters: Option<ManagedApplicationParameters>,
     #[doc = "The network function configurations from the user."]
-    #[serde(rename = "networkFunctionUserConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkFunctionUserConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_function_user_configurations: Vec<NetworkFunctionUserConfiguration>,
 }
 impl NetworkFunctionPropertiesFormat {
@@ -451,7 +478,12 @@ pub struct NetworkFunctionRoleConfiguration {
     #[serde(rename = "userDataParameters", default, skip_serializing_if = "Option::is_none")]
     pub user_data_parameters: Option<UserDataParameters>,
     #[doc = "The network interface configurations."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
     #[doc = "Specifies the storage settings for the virtual machine disks."]
     #[serde(rename = "storageProfile", default, skip_serializing_if = "Option::is_none")]
@@ -622,7 +654,11 @@ pub mod network_function_role_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkFunctionRoleInstanceListResult {
     #[doc = "A list of role instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleInstance>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -646,7 +682,11 @@ pub struct NetworkFunctionSkuDetails {
     #[serde(rename = "skuType", default, skip_serializing_if = "Option::is_none")]
     pub sku_type: Option<SkuType>,
     #[doc = "The network function sku role details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkFunctionSkuRoleDetails>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -667,7 +707,11 @@ impl NetworkFunctionSkuDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkFunctionSkuListResult {
     #[doc = "The network function vendor sku overview properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuOverview>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -697,7 +741,12 @@ pub struct NetworkFunctionSkuRoleDetails {
     #[serde(rename = "userDataParameters", default, skip_serializing_if = "Option::is_none")]
     pub user_data_parameters: Option<UserDataParameters>,
     #[doc = "The network interface configuration."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
 }
 impl NetworkFunctionSkuRoleDetails {
@@ -709,7 +758,12 @@ impl NetworkFunctionSkuRoleDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkFunctionTemplate {
     #[doc = "An array of network function role definitions."]
-    #[serde(rename = "networkFunctionRoleConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkFunctionRoleConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_function_role_configurations: Vec<NetworkFunctionRoleConfiguration>,
 }
 impl NetworkFunctionTemplate {
@@ -727,7 +781,12 @@ pub struct NetworkFunctionUserConfiguration {
     #[serde(rename = "userDataParameters", default, skip_serializing_if = "Option::is_none")]
     pub user_data_parameters: Option<UserDataParameters>,
     #[doc = "The network interface configuration."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
     #[doc = "Specifies the operating system settings for the role instance."]
     #[serde(rename = "osProfile", default, skip_serializing_if = "Option::is_none")]
@@ -778,7 +837,12 @@ pub struct NetworkFunctionVendorConfiguration {
     #[serde(rename = "userDataParameters", default, skip_serializing_if = "Option::is_none")]
     pub user_data_parameters: Option<UserDataParameters>,
     #[doc = "The network interface configurations."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
 }
 impl NetworkFunctionVendorConfiguration {
@@ -790,7 +854,11 @@ impl NetworkFunctionVendorConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkFunctionVendorListResult {
     #[doc = "A list of available network function vendors and skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkFunctionVendor>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -817,7 +885,12 @@ pub struct NetworkInterface {
     #[serde(rename = "macAddress", default, skip_serializing_if = "Option::is_none")]
     pub mac_address: Option<String>,
     #[doc = "A list of IP configurations of the network interface."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<NetworkInterfaceIpConfiguration>,
     #[doc = "The type of the VM switch."]
     #[serde(rename = "vmSwitchType", default, skip_serializing_if = "Option::is_none")]
@@ -891,7 +964,12 @@ pub struct NetworkInterfaceIpConfiguration {
     #[serde(rename = "ipVersion", default, skip_serializing_if = "Option::is_none")]
     pub ip_version: Option<network_interface_ip_configuration::IpVersion>,
     #[doc = "The list of DNS servers IP addresses."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl NetworkInterfaceIpConfiguration {
@@ -1021,7 +1099,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "A list of Microsoft.HybridNetwork operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1144,7 +1226,11 @@ impl PreviewSubscription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PreviewSubscriptionsList {
     #[doc = "A list of preview subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PreviewSubscription>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1377,7 +1463,12 @@ impl Serialize for SkuType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SshConfiguration {
     #[doc = "The list of SSH public keys used to authenticate with linux based VMs."]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<SshPublicKey>,
 }
 impl SshConfiguration {
@@ -1410,7 +1501,12 @@ pub struct StorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
     #[doc = "Specifies the parameters that are used to add a data disk to a virtual machine."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
 }
 impl StorageProfile {
@@ -1499,7 +1595,12 @@ pub struct VendorDetails {
     #[serde(rename = "vendorName", default, skip_serializing_if = "Option::is_none")]
     pub vendor_name: Option<String>,
     #[doc = "The network function sku list."]
-    #[serde(rename = "skuList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_list: Vec<SkuOverview>,
 }
 impl VendorDetails {
@@ -1511,7 +1612,11 @@ impl VendorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VendorListResult {
     #[doc = "A list of vendors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vendor>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1546,7 +1651,11 @@ impl VendorNetworkFunction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VendorNetworkFunctionListResult {
     #[doc = "A list of vendor network functions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VendorNetworkFunction>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1579,7 +1688,12 @@ pub struct VendorNetworkFunctionPropertiesFormat {
     #[serde(rename = "skuType", default, skip_serializing_if = "Option::is_none")]
     pub sku_type: Option<SkuType>,
     #[doc = "An array of network function vendor configurations."]
-    #[serde(rename = "networkFunctionVendorConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkFunctionVendorConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_function_vendor_configurations: Vec<NetworkFunctionVendorConfiguration>,
 }
 impl VendorNetworkFunctionPropertiesFormat {
@@ -1594,7 +1708,11 @@ pub struct VendorPropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "A list of IDs of the vendor skus offered by the vendor."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skus: Vec<SubResource>,
 }
 impl VendorPropertiesFormat {
@@ -1667,7 +1785,11 @@ impl VendorSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VendorSkuListResult {
     #[doc = "A list of vendor skus offered by the vendor."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VendorSku>,
     #[doc = "The URI to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/hybridnetwork/src/package_2021_05_01/models.rs b/services/mgmt/hybridnetwork/src/package_2021_05_01/models.rs
index 91fee0635c..e5b33a42b2 100644
--- a/services/mgmt/hybridnetwork/src/package_2021_05_01/models.rs
+++ b/services/mgmt/hybridnetwork/src/package_2021_05_01/models.rs
@@ -115,7 +115,11 @@ impl Device {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeviceListResult {
     #[doc = "A list of devices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Device>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -145,7 +149,12 @@ pub struct DevicePropertiesFormat {
     #[serde(rename = "deviceType")]
     pub device_type: device_properties_format::DeviceType,
     #[doc = "The list of network functions deployed on the device."]
-    #[serde(rename = "networkFunctions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkFunctions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_functions: Vec<SubResource>,
 }
 impl DevicePropertiesFormat {
@@ -279,10 +288,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -381,7 +399,11 @@ impl NetworkFunction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkFunctionListResult {
     #[doc = "A list of network function resources in a subscription or resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkFunction>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -436,7 +458,12 @@ pub struct NetworkFunctionPropertiesFormat {
     )]
     pub network_function_container_configurations: Option<serde_json::Value>,
     #[doc = "The network function configurations from the user."]
-    #[serde(rename = "networkFunctionUserConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkFunctionUserConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_function_user_configurations: Vec<NetworkFunctionUserConfiguration>,
 }
 impl NetworkFunctionPropertiesFormat {
@@ -466,7 +493,12 @@ pub struct NetworkFunctionRoleConfiguration {
     #[serde(rename = "userDataParameters", default, skip_serializing_if = "Option::is_none")]
     pub user_data_parameters: Option<UserDataParameters>,
     #[doc = "The network interface configurations."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
     #[doc = "Specifies the storage settings for the virtual machine disks."]
     #[serde(rename = "storageProfile", default, skip_serializing_if = "Option::is_none")]
@@ -637,7 +669,11 @@ pub mod network_function_role_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkFunctionRoleInstanceListResult {
     #[doc = "A list of role instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleInstance>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -661,7 +697,11 @@ pub struct NetworkFunctionSkuDetails {
     #[serde(rename = "skuType", default, skip_serializing_if = "Option::is_none")]
     pub sku_type: Option<SkuType>,
     #[doc = "The network function sku role details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkFunctionSkuRoleDetails>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -682,7 +722,11 @@ impl NetworkFunctionSkuDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkFunctionSkuListResult {
     #[doc = "The network function vendor sku overview properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuOverview>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -712,7 +756,12 @@ pub struct NetworkFunctionSkuRoleDetails {
     #[serde(rename = "userDataParameters", default, skip_serializing_if = "Option::is_none")]
     pub user_data_parameters: Option<UserDataParameters>,
     #[doc = "The network interface configuration."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
 }
 impl NetworkFunctionSkuRoleDetails {
@@ -724,7 +773,12 @@ impl NetworkFunctionSkuRoleDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkFunctionTemplate {
     #[doc = "An array of network function role definitions."]
-    #[serde(rename = "networkFunctionRoleConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkFunctionRoleConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_function_role_configurations: Vec<NetworkFunctionRoleConfiguration>,
 }
 impl NetworkFunctionTemplate {
@@ -742,7 +796,12 @@ pub struct NetworkFunctionUserConfiguration {
     #[serde(rename = "userDataParameters", default, skip_serializing_if = "Option::is_none")]
     pub user_data_parameters: Option<UserDataParameters>,
     #[doc = "The network interface configuration."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
     #[doc = "Specifies the operating system settings for the role instance."]
     #[serde(rename = "osProfile", default, skip_serializing_if = "Option::is_none")]
@@ -793,7 +852,12 @@ pub struct NetworkFunctionVendorConfiguration {
     #[serde(rename = "userDataParameters", default, skip_serializing_if = "Option::is_none")]
     pub user_data_parameters: Option<UserDataParameters>,
     #[doc = "The network interface configurations."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
 }
 impl NetworkFunctionVendorConfiguration {
@@ -805,7 +869,11 @@ impl NetworkFunctionVendorConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkFunctionVendorListResult {
     #[doc = "A list of available network function vendors and skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkFunctionVendor>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -832,7 +900,12 @@ pub struct NetworkInterface {
     #[serde(rename = "macAddress", default, skip_serializing_if = "Option::is_none")]
     pub mac_address: Option<String>,
     #[doc = "A list of IP configurations of the network interface."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<NetworkInterfaceIpConfiguration>,
     #[doc = "The type of the VM switch."]
     #[serde(rename = "vmSwitchType", default, skip_serializing_if = "Option::is_none")]
@@ -906,7 +979,12 @@ pub struct NetworkInterfaceIpConfiguration {
     #[serde(rename = "ipVersion", default, skip_serializing_if = "Option::is_none")]
     pub ip_version: Option<network_interface_ip_configuration::IpVersion>,
     #[doc = "The list of DNS servers IP addresses."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl NetworkInterfaceIpConfiguration {
@@ -1036,7 +1114,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "A list of Microsoft.HybridNetwork operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1177,7 +1259,11 @@ impl PreviewSubscriptionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PreviewSubscriptionsList {
     #[doc = "A list of preview subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PreviewSubscription>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1416,7 +1502,12 @@ impl Serialize for SkuType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SshConfiguration {
     #[doc = "The list of SSH public keys used to authenticate with linux based VMs."]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<SshPublicKey>,
 }
 impl SshConfiguration {
@@ -1449,7 +1540,12 @@ pub struct StorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
     #[doc = "Specifies the parameters that are used to add a data disk to a virtual machine."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
 }
 impl StorageProfile {
@@ -1541,7 +1637,12 @@ pub struct VendorDetails {
     #[serde(rename = "vendorName", default, skip_serializing_if = "Option::is_none")]
     pub vendor_name: Option<String>,
     #[doc = "The network function sku list."]
-    #[serde(rename = "skuList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_list: Vec<SkuOverview>,
 }
 impl VendorDetails {
@@ -1553,7 +1654,11 @@ impl VendorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VendorListResult {
     #[doc = "A list of vendors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vendor>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1591,7 +1696,11 @@ impl VendorNetworkFunction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VendorNetworkFunctionListResult {
     #[doc = "A list of vendor network functions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VendorNetworkFunction>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1624,7 +1733,12 @@ pub struct VendorNetworkFunctionPropertiesFormat {
     #[serde(rename = "skuType", default, skip_serializing_if = "Option::is_none")]
     pub sku_type: Option<SkuType>,
     #[doc = "An array of network function vendor configurations."]
-    #[serde(rename = "networkFunctionVendorConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkFunctionVendorConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_function_vendor_configurations: Vec<NetworkFunctionVendorConfiguration>,
 }
 impl VendorNetworkFunctionPropertiesFormat {
@@ -1639,7 +1753,11 @@ pub struct VendorPropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "A list of IDs of the vendor skus offered by the vendor."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skus: Vec<SubResource>,
 }
 impl VendorPropertiesFormat {
@@ -1715,7 +1833,11 @@ impl VendorSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VendorSkuListResult {
     #[doc = "A list of vendor skus offered by the vendor."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VendorSku>,
     #[doc = "The URI to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/hybridnetwork/src/package_2022_01_01_preview/models.rs b/services/mgmt/hybridnetwork/src/package_2022_01_01_preview/models.rs
index 69183fbbce..7688e02762 100644
--- a/services/mgmt/hybridnetwork/src/package_2022_01_01_preview/models.rs
+++ b/services/mgmt/hybridnetwork/src/package_2022_01_01_preview/models.rs
@@ -115,7 +115,11 @@ impl Device {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeviceListResult {
     #[doc = "A list of devices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Device>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -145,7 +149,12 @@ pub struct DevicePropertiesFormat {
     #[serde(rename = "deviceType")]
     pub device_type: device_properties_format::DeviceType,
     #[doc = "The list of network functions deployed on the device."]
-    #[serde(rename = "networkFunctions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkFunctions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_functions: Vec<SubResource>,
 }
 impl DevicePropertiesFormat {
@@ -279,10 +288,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -399,7 +417,11 @@ impl NetworkFunction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkFunctionListResult {
     #[doc = "A list of network function resources in a subscription or resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkFunction>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -454,7 +476,12 @@ pub struct NetworkFunctionPropertiesFormat {
     )]
     pub network_function_container_configurations: Option<serde_json::Value>,
     #[doc = "The network function configurations from the user."]
-    #[serde(rename = "networkFunctionUserConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkFunctionUserConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_function_user_configurations: Vec<NetworkFunctionUserConfiguration>,
 }
 impl NetworkFunctionPropertiesFormat {
@@ -484,7 +511,12 @@ pub struct NetworkFunctionRoleConfiguration {
     #[serde(rename = "userDataParameters", default, skip_serializing_if = "Option::is_none")]
     pub user_data_parameters: Option<UserDataParameters>,
     #[doc = "The network interface configurations."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
     #[doc = "Specifies the storage settings for the virtual machine disks."]
     #[serde(rename = "storageProfile", default, skip_serializing_if = "Option::is_none")]
@@ -655,7 +687,11 @@ pub mod network_function_role_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkFunctionRoleInstanceListResult {
     #[doc = "A list of role instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleInstance>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -679,7 +715,11 @@ pub struct NetworkFunctionSkuDetails {
     #[serde(rename = "skuType", default, skip_serializing_if = "Option::is_none")]
     pub sku_type: Option<SkuType>,
     #[doc = "The network function sku role details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkFunctionSkuRoleDetails>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -700,7 +740,11 @@ impl NetworkFunctionSkuDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkFunctionSkuListResult {
     #[doc = "The network function vendor sku overview properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuOverview>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -730,7 +774,12 @@ pub struct NetworkFunctionSkuRoleDetails {
     #[serde(rename = "userDataParameters", default, skip_serializing_if = "Option::is_none")]
     pub user_data_parameters: Option<UserDataParameters>,
     #[doc = "The network interface configuration."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
 }
 impl NetworkFunctionSkuRoleDetails {
@@ -742,7 +791,12 @@ impl NetworkFunctionSkuRoleDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkFunctionTemplate {
     #[doc = "An array of network function role definitions."]
-    #[serde(rename = "networkFunctionRoleConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkFunctionRoleConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_function_role_configurations: Vec<NetworkFunctionRoleConfiguration>,
 }
 impl NetworkFunctionTemplate {
@@ -760,7 +814,12 @@ pub struct NetworkFunctionUserConfiguration {
     #[serde(rename = "userDataParameters", default, skip_serializing_if = "Option::is_none")]
     pub user_data_parameters: Option<UserDataParameters>,
     #[doc = "The network interface configuration."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
     #[doc = "Specifies the operating system settings for the role instance."]
     #[serde(rename = "osProfile", default, skip_serializing_if = "Option::is_none")]
@@ -811,7 +870,12 @@ pub struct NetworkFunctionVendorConfiguration {
     #[serde(rename = "userDataParameters", default, skip_serializing_if = "Option::is_none")]
     pub user_data_parameters: Option<UserDataParameters>,
     #[doc = "The network interface configurations."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
 }
 impl NetworkFunctionVendorConfiguration {
@@ -823,7 +887,11 @@ impl NetworkFunctionVendorConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkFunctionVendorListResult {
     #[doc = "A list of available network function vendors and skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkFunctionVendor>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -850,7 +918,12 @@ pub struct NetworkInterface {
     #[serde(rename = "macAddress", default, skip_serializing_if = "Option::is_none")]
     pub mac_address: Option<String>,
     #[doc = "A list of IP configurations of the network interface."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<NetworkInterfaceIpConfiguration>,
     #[doc = "The type of the VM switch."]
     #[serde(rename = "vmSwitchType", default, skip_serializing_if = "Option::is_none")]
@@ -924,7 +997,12 @@ pub struct NetworkInterfaceIpConfiguration {
     #[serde(rename = "ipVersion", default, skip_serializing_if = "Option::is_none")]
     pub ip_version: Option<network_interface_ip_configuration::IpVersion>,
     #[doc = "The list of DNS servers IP addresses."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl NetworkInterfaceIpConfiguration {
@@ -1140,7 +1218,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1281,7 +1363,11 @@ impl PreviewSubscriptionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PreviewSubscriptionsList {
     #[doc = "A list of preview subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PreviewSubscription>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1546,7 +1632,11 @@ pub struct SkuCredential {
     #[serde(rename = "acrServerUrl", default, skip_serializing_if = "Option::is_none")]
     pub acr_server_url: Option<String>,
     #[doc = "The repositories that could be accessed using the current credential."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub repositories: Vec<String>,
     #[doc = "The UTC time when credential will expire."]
     #[serde(default, with = "azure_core::date::rfc3339::option")]
@@ -1618,7 +1708,12 @@ impl Serialize for SkuType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SshConfiguration {
     #[doc = "The list of SSH public keys used to authenticate with linux based VMs."]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<SshPublicKey>,
 }
 impl SshConfiguration {
@@ -1651,7 +1746,12 @@ pub struct StorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
     #[doc = "Specifies the parameters that are used to add a data disk to a virtual machine."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
 }
 impl StorageProfile {
@@ -1743,7 +1843,12 @@ pub struct VendorDetails {
     #[serde(rename = "vendorName", default, skip_serializing_if = "Option::is_none")]
     pub vendor_name: Option<String>,
     #[doc = "The network function sku list."]
-    #[serde(rename = "skuList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_list: Vec<SkuOverview>,
 }
 impl VendorDetails {
@@ -1755,7 +1860,11 @@ impl VendorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VendorListResult {
     #[doc = "A list of vendors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vendor>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1793,7 +1902,11 @@ impl VendorNetworkFunction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VendorNetworkFunctionListResult {
     #[doc = "A list of vendor network functions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VendorNetworkFunction>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1826,7 +1939,12 @@ pub struct VendorNetworkFunctionPropertiesFormat {
     #[serde(rename = "skuType", default, skip_serializing_if = "Option::is_none")]
     pub sku_type: Option<SkuType>,
     #[doc = "An array of network function vendor configurations."]
-    #[serde(rename = "networkFunctionVendorConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkFunctionVendorConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_function_vendor_configurations: Vec<NetworkFunctionVendorConfiguration>,
 }
 impl VendorNetworkFunctionPropertiesFormat {
@@ -1841,7 +1959,11 @@ pub struct VendorPropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "A list of IDs of the vendor skus offered by the vendor."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skus: Vec<SubResource>,
 }
 impl VendorPropertiesFormat {
@@ -1917,7 +2039,11 @@ impl VendorSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VendorSkuListResult {
     #[doc = "A list of vendor skus offered by the vendor."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VendorSku>,
     #[doc = "The URI to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/imagebuilder/src/package_2019_02/models.rs b/services/mgmt/imagebuilder/src/package_2019_02/models.rs
index c566e08c71..a0e81a1472 100644
--- a/services/mgmt/imagebuilder/src/package_2019_02/models.rs
+++ b/services/mgmt/imagebuilder/src/package_2019_02/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiError {
     #[doc = "The Api error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ApiErrorBase>,
     #[doc = "Inner error details."]
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
@@ -167,7 +171,11 @@ pub mod image_template_last_run_status {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImageTemplateListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImageTemplate>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -259,10 +267,19 @@ pub struct ImageTemplatePowerShellCustomizer {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub script: Option<String>,
     #[doc = "Array of PowerShell commands to execute"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inline: Vec<String>,
     #[doc = "Valid exit codes for the PowerShell script. [Default: 0]"]
-    #[serde(rename = "validExitCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validExitCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub valid_exit_codes: Vec<i64>,
 }
 impl ImageTemplatePowerShellCustomizer {
@@ -279,7 +296,11 @@ impl ImageTemplatePowerShellCustomizer {
 pub struct ImageTemplateProperties {
     pub source: ImageTemplateSource,
     #[doc = "Specifies the properties used to describe the customization steps of the image, like Image source etc"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customize: Vec<ImageTemplateCustomizer>,
     #[doc = "The distribution targets where the image output needs to go to."]
     pub distribute: Vec<ImageTemplateDistributor>,
@@ -357,7 +378,11 @@ pub struct ImageTemplateShellCustomizer {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub script: Option<String>,
     #[doc = "Array of shell commands to execute"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inline: Vec<String>,
 }
 impl ImageTemplateShellCustomizer {
@@ -459,7 +484,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -564,7 +593,11 @@ impl RunOutput {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunOutputCollection {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RunOutput>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/imagebuilder/src/package_2020_02/models.rs b/services/mgmt/imagebuilder/src/package_2020_02/models.rs
index 2146061718..e4f2f70bc8 100644
--- a/services/mgmt/imagebuilder/src/package_2020_02/models.rs
+++ b/services/mgmt/imagebuilder/src/package_2020_02/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiError {
     #[doc = "The Api error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ApiErrorBase>,
     #[doc = "Inner error details."]
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
@@ -206,7 +210,11 @@ pub mod image_template_last_run_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImageTemplateListResult {
     #[doc = "An array of image templates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImageTemplate>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -305,7 +313,11 @@ pub struct ImageTemplatePowerShellCustomizer {
     #[serde(rename = "sha256Checksum", default, skip_serializing_if = "Option::is_none")]
     pub sha256_checksum: Option<String>,
     #[doc = "Array of PowerShell commands to execute"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inline: Vec<String>,
     #[doc = "If specified, the PowerShell script will be run with elevated privileges"]
     #[serde(rename = "runElevated", default, skip_serializing_if = "Option::is_none")]
@@ -314,7 +326,12 @@ pub struct ImageTemplatePowerShellCustomizer {
     #[serde(rename = "runAsSystem", default, skip_serializing_if = "Option::is_none")]
     pub run_as_system: Option<bool>,
     #[doc = "Valid exit codes for the PowerShell script. [Default: 0]"]
-    #[serde(rename = "validExitCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validExitCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub valid_exit_codes: Vec<i64>,
 }
 impl ImageTemplatePowerShellCustomizer {
@@ -336,7 +353,11 @@ pub struct ImageTemplateProperties {
     #[doc = "Describes a virtual machine image source for building, customizing and distributing"]
     pub source: ImageTemplateSource,
     #[doc = "Specifies the properties used to describe the customization steps of the image, like Image source etc"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customize: Vec<ImageTemplateCustomizer>,
     #[doc = "The distribution targets where the image output needs to go to."]
     pub distribute: Vec<ImageTemplateDistributor>,
@@ -495,7 +516,11 @@ pub struct ImageTemplateShellCustomizer {
     #[serde(rename = "sha256Checksum", default, skip_serializing_if = "Option::is_none")]
     pub sha256_checksum: Option<String>,
     #[doc = "Array of shell commands to execute"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inline: Vec<String>,
 }
 impl ImageTemplateShellCustomizer {
@@ -575,7 +600,11 @@ pub struct ImageTemplateWindowsUpdateCustomizer {
     #[serde(rename = "searchCriteria", default, skip_serializing_if = "Option::is_none")]
     pub search_criteria: Option<String>,
     #[doc = "Array of filters to select updates to apply. Omit or specify empty array to use the default (no filter). Refer to above link for examples and detailed description of this field."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<String>,
     #[doc = "Maximum number of updates to apply at a time. Omit or specify 0 to use the default (1000)"]
     #[serde(rename = "updateLimit", default, skip_serializing_if = "Option::is_none")]
@@ -647,7 +676,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -824,7 +857,11 @@ impl RunOutput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunOutputCollection {
     #[doc = "An array of run outputs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RunOutput>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/imagebuilder/src/package_2021_10/models.rs b/services/mgmt/imagebuilder/src/package_2021_10/models.rs
index 2ca9de3849..08ee4a1958 100644
--- a/services/mgmt/imagebuilder/src/package_2021_10/models.rs
+++ b/services/mgmt/imagebuilder/src/package_2021_10/models.rs
@@ -34,7 +34,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -201,7 +205,11 @@ pub mod image_template_last_run_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImageTemplateListResult {
     #[doc = "An array of image templates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImageTemplate>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -304,7 +312,11 @@ pub struct ImageTemplatePowerShellCustomizer {
     #[serde(rename = "sha256Checksum", default, skip_serializing_if = "Option::is_none")]
     pub sha256_checksum: Option<String>,
     #[doc = "Array of PowerShell commands to execute"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inline: Vec<String>,
     #[doc = "If specified, the PowerShell script will be run with elevated privileges"]
     #[serde(rename = "runElevated", default, skip_serializing_if = "Option::is_none")]
@@ -313,7 +325,12 @@ pub struct ImageTemplatePowerShellCustomizer {
     #[serde(rename = "runAsSystem", default, skip_serializing_if = "Option::is_none")]
     pub run_as_system: Option<bool>,
     #[doc = "Valid exit codes for the PowerShell script. [Default: 0]"]
-    #[serde(rename = "validExitCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validExitCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub valid_exit_codes: Vec<i64>,
 }
 impl ImageTemplatePowerShellCustomizer {
@@ -335,7 +352,11 @@ pub struct ImageTemplateProperties {
     #[doc = "Describes a virtual machine image source for building, customizing and distributing"]
     pub source: ImageTemplateSource,
     #[doc = "Specifies the properties used to describe the customization steps of the image, like Image source etc"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customize: Vec<ImageTemplateCustomizer>,
     #[doc = "The distribution targets where the image output needs to go to."]
     pub distribute: Vec<ImageTemplateDistributor>,
@@ -494,7 +515,11 @@ pub struct ImageTemplateShellCustomizer {
     #[serde(rename = "sha256Checksum", default, skip_serializing_if = "Option::is_none")]
     pub sha256_checksum: Option<String>,
     #[doc = "Array of shell commands to execute"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inline: Vec<String>,
 }
 impl ImageTemplateShellCustomizer {
@@ -557,7 +582,12 @@ pub struct ImageTemplateVmProfile {
     #[serde(rename = "osDiskSizeGB", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_size_gb: Option<i64>,
     #[doc = "Optional array of resource IDs of user assigned managed identities to be configured on the build VM. This may include the identity of the image template."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<String>,
     #[doc = "Virtual Network configuration."]
     #[serde(rename = "vnetConfig", default, skip_serializing_if = "Option::is_none")]
@@ -577,7 +607,11 @@ pub struct ImageTemplateWindowsUpdateCustomizer {
     #[serde(rename = "searchCriteria", default, skip_serializing_if = "Option::is_none")]
     pub search_criteria: Option<String>,
     #[doc = "Array of filters to select updates to apply. Omit or specify empty array to use the default (no filter). Refer to above link for examples and detailed description of this field."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<String>,
     #[doc = "Maximum number of updates to apply at a time. Omit or specify 0 to use the default (1000)"]
     #[serde(rename = "updateLimit", default, skip_serializing_if = "Option::is_none")]
@@ -634,7 +668,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -800,7 +838,11 @@ impl RunOutput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunOutputCollection {
     #[doc = "An array of run outputs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RunOutput>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/imagebuilder/src/package_2022_02/models.rs b/services/mgmt/imagebuilder/src/package_2022_02/models.rs
index b4719bcb14..9cecd7ebac 100644
--- a/services/mgmt/imagebuilder/src/package_2022_02/models.rs
+++ b/services/mgmt/imagebuilder/src/package_2022_02/models.rs
@@ -34,7 +34,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -213,7 +217,11 @@ pub mod image_template_last_run_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImageTemplateListResult {
     #[doc = "An array of image templates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImageTemplate>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -316,7 +324,11 @@ pub struct ImageTemplatePowerShellCustomizer {
     #[serde(rename = "sha256Checksum", default, skip_serializing_if = "Option::is_none")]
     pub sha256_checksum: Option<String>,
     #[doc = "Array of PowerShell commands to execute"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inline: Vec<String>,
     #[doc = "If specified, the PowerShell script will be run with elevated privileges"]
     #[serde(rename = "runElevated", default, skip_serializing_if = "Option::is_none")]
@@ -325,7 +337,12 @@ pub struct ImageTemplatePowerShellCustomizer {
     #[serde(rename = "runAsSystem", default, skip_serializing_if = "Option::is_none")]
     pub run_as_system: Option<bool>,
     #[doc = "Valid exit codes for the PowerShell script. [Default: 0]"]
-    #[serde(rename = "validExitCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validExitCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub valid_exit_codes: Vec<i32>,
 }
 impl ImageTemplatePowerShellCustomizer {
@@ -353,7 +370,11 @@ pub struct ImageTemplatePowerShellValidator {
     #[serde(rename = "sha256Checksum", default, skip_serializing_if = "Option::is_none")]
     pub sha256_checksum: Option<String>,
     #[doc = "Array of PowerShell commands to execute"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inline: Vec<String>,
     #[doc = "If specified, the PowerShell script will be run with elevated privileges"]
     #[serde(rename = "runElevated", default, skip_serializing_if = "Option::is_none")]
@@ -362,7 +383,12 @@ pub struct ImageTemplatePowerShellValidator {
     #[serde(rename = "runAsSystem", default, skip_serializing_if = "Option::is_none")]
     pub run_as_system: Option<bool>,
     #[doc = "Valid exit codes for the PowerShell script. [Default: 0]"]
-    #[serde(rename = "validExitCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validExitCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub valid_exit_codes: Vec<i32>,
 }
 impl ImageTemplatePowerShellValidator {
@@ -384,7 +410,11 @@ pub struct ImageTemplateProperties {
     #[doc = "Describes a virtual machine image source for building, customizing and distributing"]
     pub source: ImageTemplateSource,
     #[doc = "Specifies the properties used to describe the customization steps of the image, like Image source etc"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customize: Vec<ImageTemplateCustomizer>,
     #[doc = "Configuration options and list of validations to be performed on the resulting image."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -442,7 +472,12 @@ pub mod image_template_properties {
         #[serde(rename = "sourceValidationOnly", default, skip_serializing_if = "Option::is_none")]
         pub source_validation_only: Option<bool>,
         #[doc = "List of validations to be performed."]
-        #[serde(rename = "inVMValidations", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "inVMValidations",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub in_vm_validations: Vec<ImageTemplateInVmValidator>,
     }
     impl Validate {
@@ -576,7 +611,11 @@ pub struct ImageTemplateShellCustomizer {
     #[serde(rename = "sha256Checksum", default, skip_serializing_if = "Option::is_none")]
     pub sha256_checksum: Option<String>,
     #[doc = "Array of shell commands to execute"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inline: Vec<String>,
 }
 impl ImageTemplateShellCustomizer {
@@ -601,7 +640,11 @@ pub struct ImageTemplateShellValidator {
     #[serde(rename = "sha256Checksum", default, skip_serializing_if = "Option::is_none")]
     pub sha256_checksum: Option<String>,
     #[doc = "Array of shell commands to execute"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inline: Vec<String>,
 }
 impl ImageTemplateShellValidator {
@@ -664,7 +707,12 @@ pub struct ImageTemplateVmProfile {
     #[serde(rename = "osDiskSizeGB", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_size_gb: Option<i32>,
     #[doc = "Optional array of resource IDs of user assigned managed identities to be configured on the build VM and validation VM. This may include the identity of the image template."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<String>,
     #[doc = "Virtual Network configuration."]
     #[serde(rename = "vnetConfig", default, skip_serializing_if = "Option::is_none")]
@@ -684,7 +732,11 @@ pub struct ImageTemplateWindowsUpdateCustomizer {
     #[serde(rename = "searchCriteria", default, skip_serializing_if = "Option::is_none")]
     pub search_criteria: Option<String>,
     #[doc = "Array of filters to select updates to apply. Omit or specify empty array to use the default (no filter). Refer to above link for examples and detailed description of this field."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<String>,
     #[doc = "Maximum number of updates to apply at a time. Omit or specify 0 to use the default (1000)"]
     #[serde(rename = "updateLimit", default, skip_serializing_if = "Option::is_none")]
@@ -741,7 +793,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -930,7 +986,11 @@ impl RunOutput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunOutputCollection {
     #[doc = "An array of run outputs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RunOutput>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/imagebuilder/src/package_preview_2019_05/models.rs b/services/mgmt/imagebuilder/src/package_preview_2019_05/models.rs
index 7be66ff51d..181b268744 100644
--- a/services/mgmt/imagebuilder/src/package_preview_2019_05/models.rs
+++ b/services/mgmt/imagebuilder/src/package_preview_2019_05/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiError {
     #[doc = "The Api error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ApiErrorBase>,
     #[doc = "Inner error details."]
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
@@ -226,7 +230,11 @@ pub mod image_template_last_run_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImageTemplateListResult {
     #[doc = "An array of image templates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImageTemplate>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -321,13 +329,22 @@ pub struct ImageTemplatePowerShellCustomizer {
     #[serde(rename = "sha256Checksum", default, skip_serializing_if = "Option::is_none")]
     pub sha256_checksum: Option<String>,
     #[doc = "Array of PowerShell commands to execute"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inline: Vec<String>,
     #[doc = "If specified, the PowerShell script will be run with elevated privileges"]
     #[serde(rename = "runElevated", default, skip_serializing_if = "Option::is_none")]
     pub run_elevated: Option<bool>,
     #[doc = "Valid exit codes for the PowerShell script. [Default: 0]"]
-    #[serde(rename = "validExitCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validExitCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub valid_exit_codes: Vec<i64>,
 }
 impl ImageTemplatePowerShellCustomizer {
@@ -348,7 +365,11 @@ pub struct ImageTemplateProperties {
     #[doc = "Describes a virtual machine image source for building, customizing and distributing"]
     pub source: ImageTemplateSource,
     #[doc = "Specifies the properties used to describe the customization steps of the image, like Image source etc"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customize: Vec<ImageTemplateCustomizer>,
     #[doc = "The distribution targets where the image output needs to go to."]
     pub distribute: Vec<ImageTemplateDistributor>,
@@ -457,7 +478,11 @@ pub struct ImageTemplateShellCustomizer {
     #[serde(rename = "sha256Checksum", default, skip_serializing_if = "Option::is_none")]
     pub sha256_checksum: Option<String>,
     #[doc = "Array of shell commands to execute"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inline: Vec<String>,
 }
 impl ImageTemplateShellCustomizer {
@@ -576,7 +601,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -734,7 +763,11 @@ impl RunOutput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RunOutputCollection {
     #[doc = "An array of run outputs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RunOutput>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/intune/src/package_2015_01_preview/models.rs b/services/mgmt/intune/src/package_2015_01_preview/models.rs
index 9a583b2aef..ce7f7476b2 100644
--- a/services/mgmt/intune/src/package_2015_01_preview/models.rs
+++ b/services/mgmt/intune/src/package_2015_01_preview/models.rs
@@ -270,7 +270,11 @@ pub struct FlaggedEnrolledAppProperties {
     pub last_modified_time: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub platform: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<FlaggedEnrolledAppError>,
 }
 impl FlaggedEnrolledAppProperties {
diff --git a/services/mgmt/intune/src/package_2015_01_privatepreview/models.rs b/services/mgmt/intune/src/package_2015_01_privatepreview/models.rs
index 2739fa271a..4edb501010 100644
--- a/services/mgmt/intune/src/package_2015_01_privatepreview/models.rs
+++ b/services/mgmt/intune/src/package_2015_01_privatepreview/models.rs
@@ -270,7 +270,11 @@ pub struct FlaggedEnrolledAppProperties {
     pub last_modified_time: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub platform: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<FlaggedEnrolledAppError>,
 }
 impl FlaggedEnrolledAppProperties {
diff --git a/services/mgmt/iotcentral/src/package_2018_09_01/models.rs b/services/mgmt/iotcentral/src/package_2018_09_01/models.rs
index e0874189ba..5ee3690619 100644
--- a/services/mgmt/iotcentral/src/package_2018_09_01/models.rs
+++ b/services/mgmt/iotcentral/src/package_2018_09_01/models.rs
@@ -48,7 +48,11 @@ pub struct AppListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of IoT Central Applications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<App>,
 }
 impl azure_core::Continuable for AppListResult {
@@ -237,7 +241,11 @@ pub struct AppTemplate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub industry: Option<String>,
     #[doc = "A list of locations that support the template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<AppTemplateLocations>,
 }
 impl AppTemplate {
@@ -267,7 +275,11 @@ pub struct AppTemplatesResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of IoT Central Application Templates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AppTemplate>,
 }
 impl azure_core::Continuable for AppTemplatesResult {
@@ -312,7 +324,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -383,7 +399,11 @@ pub struct OperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of operations supported by the Microsoft.IoTCentral resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
diff --git a/services/mgmt/iotcentral/src/package_2021_06/models.rs b/services/mgmt/iotcentral/src/package_2021_06/models.rs
index 8aa5fc4bce..bce2a95cb0 100644
--- a/services/mgmt/iotcentral/src/package_2021_06/models.rs
+++ b/services/mgmt/iotcentral/src/package_2021_06/models.rs
@@ -52,7 +52,11 @@ pub struct AppListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of IoT Central Applications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<App>,
 }
 impl azure_core::Continuable for AppListResult {
@@ -231,7 +235,11 @@ pub struct AppTemplate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub industry: Option<String>,
     #[doc = "A list of locations that support the template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<AppTemplateLocations>,
 }
 impl AppTemplate {
@@ -261,7 +269,11 @@ pub struct AppTemplatesResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of IoT Central Application Templates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AppTemplate>,
 }
 impl azure_core::Continuable for AppTemplatesResult {
@@ -306,7 +318,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -377,7 +393,11 @@ pub struct OperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of operations supported by the Microsoft.IoTCentral resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
diff --git a/services/mgmt/iotcentral/src/package_preview_2021_11/models.rs b/services/mgmt/iotcentral/src/package_preview_2021_11/models.rs
index c8d6cfc716..22a7a3d629 100644
--- a/services/mgmt/iotcentral/src/package_preview_2021_11/models.rs
+++ b/services/mgmt/iotcentral/src/package_preview_2021_11/models.rs
@@ -52,7 +52,11 @@ pub struct AppListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of IoT Central Applications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<App>,
 }
 impl azure_core::Continuable for AppListResult {
@@ -115,7 +119,12 @@ pub struct AppProperties {
     #[serde(rename = "networkRuleSets", default, skip_serializing_if = "Option::is_none")]
     pub network_rule_sets: Option<NetworkRuleSets>,
     #[doc = "Private endpoint connections created on this IoT Central application."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl AppProperties {
@@ -243,7 +252,11 @@ pub struct AppTemplate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub industry: Option<String>,
     #[doc = "A list of locations that support the template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<AppTemplateLocations>,
 }
 impl AppTemplate {
@@ -273,7 +286,11 @@ pub struct AppTemplatesResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of IoT Central Application Templates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AppTemplate>,
 }
 impl azure_core::Continuable for AppTemplatesResult {
@@ -315,10 +332,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -455,7 +481,12 @@ pub struct NetworkRuleSets {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<NetworkAction>,
     #[doc = "List of IP rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<NetworkRuleSetIpRule>,
 }
 impl NetworkRuleSets {
@@ -526,7 +557,11 @@ pub struct OperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of operations supported by the Microsoft.IoTCentral resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -570,7 +605,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -588,7 +627,12 @@ impl PrivateEndpointConnectionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct PrivateEndpointConnectionProperties {
     #[doc = "The group ids for the private endpoint resource."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "The private endpoint resource."]
     #[serde(rename = "privateEndpoint", default, skip_serializing_if = "Option::is_none")]
@@ -708,7 +752,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -729,10 +777,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
diff --git a/services/mgmt/iothub/src/package_preview_2020_08_31/models.rs b/services/mgmt/iothub/src/package_preview_2020_08_31/models.rs
index b8fcff70e9..8f35cc63ef 100644
--- a/services/mgmt/iothub/src/package_preview_2020_08_31/models.rs
+++ b/services/mgmt/iothub/src/package_preview_2020_08_31/models.rs
@@ -74,7 +74,11 @@ impl CertificateDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListDescription {
     #[doc = "The array of Certificate objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateDescription>,
 }
 impl CertificateListDescription {
@@ -206,7 +210,12 @@ pub struct EncryptionPropertiesDescription {
     #[serde(rename = "keySource", default, skip_serializing_if = "Option::is_none")]
     pub key_source: Option<String>,
     #[doc = "The properties of the KeyVault key."]
-    #[serde(rename = "keyVaultProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyVaultProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_vault_properties: Vec<KeyVaultKeyProperties>,
 }
 impl EncryptionPropertiesDescription {
@@ -296,7 +305,11 @@ pub mod endpoint_health_data {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EndpointHealthDataListResult {
     #[doc = "JSON-serialized array of Endpoint health data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EndpointHealthData>,
     #[doc = "Link to more results"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -412,7 +425,11 @@ impl EventHubConsumerGroupName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventHubConsumerGroupsListResult {
     #[doc = "List of consumer groups objects"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventHubConsumerGroupInfo>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -439,7 +456,12 @@ pub struct EventHubProperties {
     #[serde(rename = "partitionCount", default, skip_serializing_if = "Option::is_none")]
     pub partition_count: Option<i32>,
     #[doc = "The partition ids in the Event Hub-compatible endpoint."]
-    #[serde(rename = "partitionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_ids: Vec<String>,
     #[doc = "The Event Hub-compatible name."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -650,10 +672,20 @@ pub struct GroupIdInformationProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The required members for a specific group id"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The required DNS zones for a specific group id"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl GroupIdInformationProperties {
@@ -795,7 +827,11 @@ impl IotHubDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubDescriptionListResult {
     #[doc = "The array of IotHubDescription objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotHubDescription>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -900,13 +936,23 @@ pub mod iot_hub_name_availability_info {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubProperties {
     #[doc = "The shared access policies you can use to secure a connection to the IoT hub."]
-    #[serde(rename = "authorizationPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_policies: Vec<SharedAccessSignatureAuthorizationRule>,
     #[doc = "Whether requests from Public Network are allowed"]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<iot_hub_properties::PublicNetworkAccess>,
     #[doc = "The IP filter rules."]
-    #[serde(rename = "ipFilterRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipFilterRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_filter_rules: Vec<IpFilterRule>,
     #[doc = "Network Rule Set Properties of IotHub"]
     #[serde(rename = "networkRuleSets", default, skip_serializing_if = "Option::is_none")]
@@ -915,7 +961,12 @@ pub struct IotHubProperties {
     #[serde(rename = "minTlsVersion", default, skip_serializing_if = "Option::is_none")]
     pub min_tls_version: Option<String>,
     #[doc = "Private endpoint connections created on this IotHub"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -957,7 +1008,11 @@ pub struct IotHubProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionPropertiesDescription>,
     #[doc = "Primary and secondary location for iot hub"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<IotHubLocationDescription>,
 }
 impl IotHubProperties {
@@ -1008,7 +1063,12 @@ pub mod iot_hub_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct DeviceStreams {
         #[doc = "List of Device Streams Endpoints."]
-        #[serde(rename = "streamingEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "streamingEndpoints",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub streaming_endpoints: Vec<String>,
     }
     impl DeviceStreams {
@@ -1076,7 +1136,11 @@ impl IotHubQuotaMetricInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubQuotaMetricInfoListResult {
     #[doc = "The array of quota metrics objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotHubQuotaMetricInfo>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1117,7 +1181,11 @@ impl IotHubSkuDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubSkuDescriptionListResult {
     #[doc = "The array of IotHubSkuDescription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotHubSkuDescription>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1361,7 +1429,11 @@ pub mod job_response {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobResponseListResult {
     #[doc = "The array of JobResponse objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResponse>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1636,7 +1708,11 @@ impl OperationInputs {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of IoT Hub operations supported by the Microsoft.Devices resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1713,7 +1789,11 @@ pub type PrivateEndpointConnectionsList = Vec<PrivateEndpointConnection>;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResources {
     #[doc = "The list of available private link resources for an IotHub"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupIdInformation>,
 }
 impl PrivateLinkResources {
@@ -2002,16 +2082,36 @@ pub mod route_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingEndpoints {
     #[doc = "The list of Service Bus queue endpoints that IoT hub routes the messages to, based on the routing rules."]
-    #[serde(rename = "serviceBusQueues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceBusQueues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_bus_queues: Vec<RoutingServiceBusQueueEndpointProperties>,
     #[doc = "The list of Service Bus topic endpoints that the IoT hub routes the messages to, based on the routing rules."]
-    #[serde(rename = "serviceBusTopics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceBusTopics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_bus_topics: Vec<RoutingServiceBusTopicEndpointProperties>,
     #[doc = "The list of Event Hubs endpoints that IoT hub routes messages to, based on the routing rules. This list does not include the built-in Event Hubs endpoint."]
-    #[serde(rename = "eventHubs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eventHubs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub event_hubs: Vec<RoutingEventHubProperties>,
     #[doc = "The list of storage container endpoints that IoT hub routes messages to, based on the routing rules."]
-    #[serde(rename = "storageContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_containers: Vec<RoutingStorageContainerProperties>,
 }
 impl RoutingEndpoints {
@@ -2127,13 +2227,21 @@ pub struct RoutingProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub endpoints: Option<RoutingEndpoints>,
     #[doc = "The list of user-provided routing rules that the IoT hub uses to route messages to built-in and custom endpoints. A maximum of 100 routing rules are allowed for paid hubs and a maximum of 5 routing rules are allowed for free hubs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<RouteProperties>,
     #[doc = "The properties of the fallback route. IoT Hub uses these properties when it routes messages to the fallback endpoint."]
     #[serde(rename = "fallbackRoute", default, skip_serializing_if = "Option::is_none")]
     pub fallback_route: Option<FallbackRouteProperties>,
     #[doc = "The list of user-provided enrichments that the IoT hub applies to messages to be delivered to built-in and custom endpoints. See: https://aka.ms/telemetryoneventgrid"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enrichments: Vec<EnrichmentProperties>,
 }
 impl RoutingProperties {
@@ -2507,7 +2615,11 @@ pub mod shared_access_signature_authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedAccessSignatureAuthorizationRuleListResult {
     #[doc = "The list of shared access policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedAccessSignatureAuthorizationRule>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2674,7 +2786,11 @@ pub mod test_all_routes_input {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestAllRoutesResult {
     #[doc = "JSON-serialized array of matched routes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<MatchedRoute>,
 }
 impl TestAllRoutesResult {
@@ -2767,7 +2883,12 @@ pub mod test_route_result {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestRouteResultDetails {
     #[doc = "JSON-serialized list of route compilation errors"]
-    #[serde(rename = "compilationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "compilationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compilation_errors: Vec<RouteCompilationError>,
 }
 impl TestRouteResultDetails {
@@ -2805,7 +2926,11 @@ impl UserSubscriptionQuota {
 #[doc = "Json-serialized array of User subscription quota response"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserSubscriptionQuotaListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserSubscriptionQuota>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
diff --git a/services/mgmt/iothub/src/package_preview_2021_02/models.rs b/services/mgmt/iothub/src/package_preview_2021_02/models.rs
index 696b258843..a0f70c9c61 100644
--- a/services/mgmt/iothub/src/package_preview_2021_02/models.rs
+++ b/services/mgmt/iothub/src/package_preview_2021_02/models.rs
@@ -86,7 +86,11 @@ impl CertificateDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListDescription {
     #[doc = "The array of Certificate objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateDescription>,
 }
 impl CertificateListDescription {
@@ -218,7 +222,12 @@ pub struct EncryptionPropertiesDescription {
     #[serde(rename = "keySource", default, skip_serializing_if = "Option::is_none")]
     pub key_source: Option<String>,
     #[doc = "The properties of the KeyVault key."]
-    #[serde(rename = "keyVaultProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyVaultProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_vault_properties: Vec<KeyVaultKeyProperties>,
 }
 impl EncryptionPropertiesDescription {
@@ -308,7 +317,11 @@ pub mod endpoint_health_data {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EndpointHealthDataListResult {
     #[doc = "JSON-serialized array of Endpoint health data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EndpointHealthData>,
     #[doc = "Link to more results"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -424,7 +437,11 @@ impl EventHubConsumerGroupName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventHubConsumerGroupsListResult {
     #[doc = "List of consumer groups objects"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventHubConsumerGroupInfo>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -451,7 +468,12 @@ pub struct EventHubProperties {
     #[serde(rename = "partitionCount", default, skip_serializing_if = "Option::is_none")]
     pub partition_count: Option<i32>,
     #[doc = "The partition ids in the Event Hub-compatible endpoint."]
-    #[serde(rename = "partitionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_ids: Vec<String>,
     #[doc = "The Event Hub-compatible name."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -662,10 +684,20 @@ pub struct GroupIdInformationProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The required members for a specific group id"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The required DNS zones for a specific group id"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl GroupIdInformationProperties {
@@ -807,7 +839,11 @@ impl IotHubDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubDescriptionListResult {
     #[doc = "The array of IotHubDescription objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotHubDescription>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -912,13 +948,23 @@ pub mod iot_hub_name_availability_info {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubProperties {
     #[doc = "The shared access policies you can use to secure a connection to the IoT hub."]
-    #[serde(rename = "authorizationPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_policies: Vec<SharedAccessSignatureAuthorizationRule>,
     #[doc = "Whether requests from Public Network are allowed"]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<iot_hub_properties::PublicNetworkAccess>,
     #[doc = "The IP filter rules."]
-    #[serde(rename = "ipFilterRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipFilterRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_filter_rules: Vec<IpFilterRule>,
     #[doc = "Network Rule Set Properties of IotHub"]
     #[serde(rename = "networkRuleSets", default, skip_serializing_if = "Option::is_none")]
@@ -927,7 +973,12 @@ pub struct IotHubProperties {
     #[serde(rename = "minTlsVersion", default, skip_serializing_if = "Option::is_none")]
     pub min_tls_version: Option<String>,
     #[doc = "Private endpoint connections created on this IotHub"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -969,7 +1020,11 @@ pub struct IotHubProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionPropertiesDescription>,
     #[doc = "Primary and secondary location for iot hub"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<IotHubLocationDescription>,
 }
 impl IotHubProperties {
@@ -1020,7 +1075,12 @@ pub mod iot_hub_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct DeviceStreams {
         #[doc = "List of Device Streams Endpoints."]
-        #[serde(rename = "streamingEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "streamingEndpoints",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub streaming_endpoints: Vec<String>,
     }
     impl DeviceStreams {
@@ -1088,7 +1148,11 @@ impl IotHubQuotaMetricInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubQuotaMetricInfoListResult {
     #[doc = "The array of quota metrics objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotHubQuotaMetricInfo>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1129,7 +1193,11 @@ impl IotHubSkuDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubSkuDescriptionListResult {
     #[doc = "The array of IotHubSkuDescription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotHubSkuDescription>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1373,7 +1441,11 @@ pub mod job_response {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobResponseListResult {
     #[doc = "The array of JobResponse objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResponse>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1648,7 +1720,11 @@ impl OperationInputs {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of IoT Hub operations supported by the Microsoft.Devices resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1725,7 +1801,11 @@ pub type PrivateEndpointConnectionsList = Vec<PrivateEndpointConnection>;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResources {
     #[doc = "The list of available private link resources for an IotHub"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupIdInformation>,
 }
 impl PrivateLinkResources {
@@ -2016,16 +2096,36 @@ pub mod route_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingEndpoints {
     #[doc = "The list of Service Bus queue endpoints that IoT hub routes the messages to, based on the routing rules."]
-    #[serde(rename = "serviceBusQueues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceBusQueues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_bus_queues: Vec<RoutingServiceBusQueueEndpointProperties>,
     #[doc = "The list of Service Bus topic endpoints that the IoT hub routes the messages to, based on the routing rules."]
-    #[serde(rename = "serviceBusTopics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceBusTopics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_bus_topics: Vec<RoutingServiceBusTopicEndpointProperties>,
     #[doc = "The list of Event Hubs endpoints that IoT hub routes messages to, based on the routing rules. This list does not include the built-in Event Hubs endpoint."]
-    #[serde(rename = "eventHubs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eventHubs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub event_hubs: Vec<RoutingEventHubProperties>,
     #[doc = "The list of storage container endpoints that IoT hub routes messages to, based on the routing rules."]
-    #[serde(rename = "storageContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_containers: Vec<RoutingStorageContainerProperties>,
 }
 impl RoutingEndpoints {
@@ -2141,13 +2241,21 @@ pub struct RoutingProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub endpoints: Option<RoutingEndpoints>,
     #[doc = "The list of user-provided routing rules that the IoT hub uses to route messages to built-in and custom endpoints. A maximum of 100 routing rules are allowed for paid hubs and a maximum of 5 routing rules are allowed for free hubs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<RouteProperties>,
     #[doc = "The properties of the fallback route. IoT Hub uses these properties when it routes messages to the fallback endpoint."]
     #[serde(rename = "fallbackRoute", default, skip_serializing_if = "Option::is_none")]
     pub fallback_route: Option<FallbackRouteProperties>,
     #[doc = "The list of user-provided enrichments that the IoT hub applies to messages to be delivered to built-in and custom endpoints. See: https://aka.ms/telemetryoneventgrid"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enrichments: Vec<EnrichmentProperties>,
 }
 impl RoutingProperties {
@@ -2521,7 +2629,11 @@ pub mod shared_access_signature_authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedAccessSignatureAuthorizationRuleListResult {
     #[doc = "The list of shared access policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedAccessSignatureAuthorizationRule>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2692,7 +2804,11 @@ pub mod test_all_routes_input {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestAllRoutesResult {
     #[doc = "JSON-serialized array of matched routes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<MatchedRoute>,
 }
 impl TestAllRoutesResult {
@@ -2785,7 +2901,12 @@ pub mod test_route_result {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestRouteResultDetails {
     #[doc = "JSON-serialized list of route compilation errors"]
-    #[serde(rename = "compilationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "compilationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compilation_errors: Vec<RouteCompilationError>,
 }
 impl TestRouteResultDetails {
@@ -2823,7 +2944,11 @@ impl UserSubscriptionQuota {
 #[doc = "Json-serialized array of User subscription quota response"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserSubscriptionQuotaListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserSubscriptionQuota>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
diff --git a/services/mgmt/iothub/src/package_preview_2021_03/models.rs b/services/mgmt/iothub/src/package_preview_2021_03/models.rs
index b77a7220d6..f1cc03655c 100644
--- a/services/mgmt/iothub/src/package_preview_2021_03/models.rs
+++ b/services/mgmt/iothub/src/package_preview_2021_03/models.rs
@@ -86,7 +86,11 @@ impl CertificateDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListDescription {
     #[doc = "The array of Certificate objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateDescription>,
 }
 impl CertificateListDescription {
@@ -218,7 +222,12 @@ pub struct EncryptionPropertiesDescription {
     #[serde(rename = "keySource", default, skip_serializing_if = "Option::is_none")]
     pub key_source: Option<String>,
     #[doc = "The properties of the KeyVault key."]
-    #[serde(rename = "keyVaultProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyVaultProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_vault_properties: Vec<KeyVaultKeyProperties>,
 }
 impl EncryptionPropertiesDescription {
@@ -308,7 +317,11 @@ pub mod endpoint_health_data {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EndpointHealthDataListResult {
     #[doc = "JSON-serialized array of Endpoint health data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EndpointHealthData>,
     #[doc = "Link to more results"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -424,7 +437,11 @@ impl EventHubConsumerGroupName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventHubConsumerGroupsListResult {
     #[doc = "List of consumer groups objects"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventHubConsumerGroupInfo>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -451,7 +468,12 @@ pub struct EventHubProperties {
     #[serde(rename = "partitionCount", default, skip_serializing_if = "Option::is_none")]
     pub partition_count: Option<i32>,
     #[doc = "The partition ids in the Event Hub-compatible endpoint."]
-    #[serde(rename = "partitionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_ids: Vec<String>,
     #[doc = "The Event Hub-compatible name."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -666,10 +688,20 @@ pub struct GroupIdInformationProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The required members for a specific group id"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The required DNS zones for a specific group id"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl GroupIdInformationProperties {
@@ -815,7 +847,11 @@ impl IotHubDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubDescriptionListResult {
     #[doc = "The array of IotHubDescription objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotHubDescription>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -920,13 +956,23 @@ pub mod iot_hub_name_availability_info {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubProperties {
     #[doc = "The shared access policies you can use to secure a connection to the IoT hub."]
-    #[serde(rename = "authorizationPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_policies: Vec<SharedAccessSignatureAuthorizationRule>,
     #[doc = "Whether requests from Public Network are allowed"]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<iot_hub_properties::PublicNetworkAccess>,
     #[doc = "The IP filter rules."]
-    #[serde(rename = "ipFilterRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipFilterRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_filter_rules: Vec<IpFilterRule>,
     #[doc = "Network Rule Set Properties of IotHub"]
     #[serde(rename = "networkRuleSets", default, skip_serializing_if = "Option::is_none")]
@@ -935,7 +981,12 @@ pub struct IotHubProperties {
     #[serde(rename = "minTlsVersion", default, skip_serializing_if = "Option::is_none")]
     pub min_tls_version: Option<String>,
     #[doc = "Private endpoint connections created on this IotHub"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -977,7 +1028,11 @@ pub struct IotHubProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionPropertiesDescription>,
     #[doc = "Primary and secondary location for iot hub"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<IotHubLocationDescription>,
 }
 impl IotHubProperties {
@@ -1028,7 +1083,12 @@ pub mod iot_hub_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct DeviceStreams {
         #[doc = "List of Device Streams Endpoints."]
-        #[serde(rename = "streamingEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "streamingEndpoints",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub streaming_endpoints: Vec<String>,
     }
     impl DeviceStreams {
@@ -1096,7 +1156,11 @@ impl IotHubQuotaMetricInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubQuotaMetricInfoListResult {
     #[doc = "The array of quota metrics objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotHubQuotaMetricInfo>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1137,7 +1201,11 @@ impl IotHubSkuDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubSkuDescriptionListResult {
     #[doc = "The array of IotHubSkuDescription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotHubSkuDescription>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1381,7 +1449,11 @@ pub mod job_response {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobResponseListResult {
     #[doc = "The array of JobResponse objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResponse>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1656,7 +1728,11 @@ impl OperationInputs {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of IoT Hub operations supported by the Microsoft.Devices resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1733,7 +1809,11 @@ pub type PrivateEndpointConnectionsList = Vec<PrivateEndpointConnection>;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResources {
     #[doc = "The list of available private link resources for an IotHub"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupIdInformation>,
 }
 impl PrivateLinkResources {
@@ -2024,16 +2104,36 @@ pub mod route_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingEndpoints {
     #[doc = "The list of Service Bus queue endpoints that IoT hub routes the messages to, based on the routing rules."]
-    #[serde(rename = "serviceBusQueues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceBusQueues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_bus_queues: Vec<RoutingServiceBusQueueEndpointProperties>,
     #[doc = "The list of Service Bus topic endpoints that the IoT hub routes the messages to, based on the routing rules."]
-    #[serde(rename = "serviceBusTopics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceBusTopics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_bus_topics: Vec<RoutingServiceBusTopicEndpointProperties>,
     #[doc = "The list of Event Hubs endpoints that IoT hub routes messages to, based on the routing rules. This list does not include the built-in Event Hubs endpoint."]
-    #[serde(rename = "eventHubs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eventHubs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub event_hubs: Vec<RoutingEventHubProperties>,
     #[doc = "The list of storage container endpoints that IoT hub routes messages to, based on the routing rules."]
-    #[serde(rename = "storageContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_containers: Vec<RoutingStorageContainerProperties>,
 }
 impl RoutingEndpoints {
@@ -2153,13 +2253,21 @@ pub struct RoutingProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub endpoints: Option<RoutingEndpoints>,
     #[doc = "The list of user-provided routing rules that the IoT hub uses to route messages to built-in and custom endpoints. A maximum of 100 routing rules are allowed for paid hubs and a maximum of 5 routing rules are allowed for free hubs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<RouteProperties>,
     #[doc = "The properties of the fallback route. IoT Hub uses these properties when it routes messages to the fallback endpoint."]
     #[serde(rename = "fallbackRoute", default, skip_serializing_if = "Option::is_none")]
     pub fallback_route: Option<FallbackRouteProperties>,
     #[doc = "The list of user-provided enrichments that the IoT hub applies to messages to be delivered to built-in and custom endpoints. See: https://aka.ms/telemetryoneventgrid"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enrichments: Vec<EnrichmentProperties>,
 }
 impl RoutingProperties {
@@ -2545,7 +2653,11 @@ pub mod shared_access_signature_authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedAccessSignatureAuthorizationRuleListResult {
     #[doc = "The list of shared access policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedAccessSignatureAuthorizationRule>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2720,7 +2832,11 @@ pub mod test_all_routes_input {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestAllRoutesResult {
     #[doc = "JSON-serialized array of matched routes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<MatchedRoute>,
 }
 impl TestAllRoutesResult {
@@ -2813,7 +2929,12 @@ pub mod test_route_result {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestRouteResultDetails {
     #[doc = "JSON-serialized list of route compilation errors"]
-    #[serde(rename = "compilationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "compilationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compilation_errors: Vec<RouteCompilationError>,
 }
 impl TestRouteResultDetails {
@@ -2851,7 +2972,11 @@ impl UserSubscriptionQuota {
 #[doc = "Json-serialized array of User subscription quota response"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserSubscriptionQuotaListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserSubscriptionQuota>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
diff --git a/services/mgmt/iothub/src/package_preview_2021_07_02/models.rs b/services/mgmt/iothub/src/package_preview_2021_07_02/models.rs
index b4ffbba4eb..371eeb4843 100644
--- a/services/mgmt/iothub/src/package_preview_2021_07_02/models.rs
+++ b/services/mgmt/iothub/src/package_preview_2021_07_02/models.rs
@@ -89,7 +89,11 @@ impl CertificateDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListDescription {
     #[doc = "The array of Certificate objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateDescription>,
 }
 impl CertificateListDescription {
@@ -221,7 +225,12 @@ pub struct EncryptionPropertiesDescription {
     #[serde(rename = "keySource", default, skip_serializing_if = "Option::is_none")]
     pub key_source: Option<String>,
     #[doc = "The properties of the KeyVault key."]
-    #[serde(rename = "keyVaultProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyVaultProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_vault_properties: Vec<KeyVaultKeyProperties>,
 }
 impl EncryptionPropertiesDescription {
@@ -311,7 +320,11 @@ pub mod endpoint_health_data {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EndpointHealthDataListResult {
     #[doc = "JSON-serialized array of Endpoint health data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EndpointHealthData>,
     #[doc = "Link to more results"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -425,7 +438,11 @@ impl EventHubConsumerGroupName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventHubConsumerGroupsListResult {
     #[doc = "List of consumer groups objects"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventHubConsumerGroupInfo>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -452,7 +469,12 @@ pub struct EventHubProperties {
     #[serde(rename = "partitionCount", default, skip_serializing_if = "Option::is_none")]
     pub partition_count: Option<i32>,
     #[doc = "The partition ids in the Event Hub-compatible endpoint."]
-    #[serde(rename = "partitionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_ids: Vec<String>,
     #[doc = "The Event Hub-compatible name."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -675,10 +697,20 @@ pub struct GroupIdInformationProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The required members for a specific group id"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The required DNS zones for a specific group id"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl GroupIdInformationProperties {
@@ -836,7 +868,11 @@ impl IotHubDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubDescriptionListResult {
     #[doc = "The array of IotHubDescription objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotHubDescription>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -941,7 +977,12 @@ pub mod iot_hub_name_availability_info {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubProperties {
     #[doc = "The shared access policies you can use to secure a connection to the IoT hub."]
-    #[serde(rename = "authorizationPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_policies: Vec<SharedAccessSignatureAuthorizationRule>,
     #[doc = "If true, SAS tokens with Iot hub scoped SAS keys cannot be used for authentication."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -956,13 +997,23 @@ pub struct IotHubProperties {
     #[serde(rename = "restrictOutboundNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub restrict_outbound_network_access: Option<bool>,
     #[doc = "List of allowed FQDNs(Fully Qualified Domain Name) for egress from Iot Hub."]
-    #[serde(rename = "allowedFqdnList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedFqdnList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_fqdn_list: Vec<String>,
     #[doc = "Whether requests from Public Network are allowed"]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<iot_hub_properties::PublicNetworkAccess>,
     #[doc = "The IP filter rules."]
-    #[serde(rename = "ipFilterRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipFilterRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_filter_rules: Vec<IpFilterRule>,
     #[doc = "Network Rule Set Properties of IotHub"]
     #[serde(rename = "networkRuleSets", default, skip_serializing_if = "Option::is_none")]
@@ -971,7 +1022,12 @@ pub struct IotHubProperties {
     #[serde(rename = "minTlsVersion", default, skip_serializing_if = "Option::is_none")]
     pub min_tls_version: Option<String>,
     #[doc = "Private endpoint connections created on this IotHub"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1013,7 +1069,11 @@ pub struct IotHubProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionPropertiesDescription>,
     #[doc = "Primary and secondary location for iot hub"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<IotHubLocationDescription>,
     #[doc = "This property when set to true, will enable data residency, thus, disabling disaster recovery."]
     #[serde(rename = "enableDataResidency", default, skip_serializing_if = "Option::is_none")]
@@ -1067,7 +1127,12 @@ pub mod iot_hub_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct DeviceStreams {
         #[doc = "List of Device Streams Endpoints."]
-        #[serde(rename = "streamingEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "streamingEndpoints",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub streaming_endpoints: Vec<String>,
     }
     impl DeviceStreams {
@@ -1135,7 +1200,11 @@ impl IotHubQuotaMetricInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubQuotaMetricInfoListResult {
     #[doc = "The array of quota metrics objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotHubQuotaMetricInfo>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1176,7 +1245,11 @@ impl IotHubSkuDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubSkuDescriptionListResult {
     #[doc = "The array of IotHubSkuDescription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotHubSkuDescription>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1420,7 +1493,11 @@ pub mod job_response {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobResponseListResult {
     #[doc = "The array of JobResponse objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResponse>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1695,7 +1772,11 @@ impl OperationInputs {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of IoT Hub operations supported by the Microsoft.Devices resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1772,7 +1853,11 @@ pub type PrivateEndpointConnectionsList = Vec<PrivateEndpointConnection>;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResources {
     #[doc = "The list of available private link resources for an IotHub"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupIdInformation>,
 }
 impl PrivateLinkResources {
@@ -2065,16 +2150,36 @@ pub mod route_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingEndpoints {
     #[doc = "The list of Service Bus queue endpoints that IoT hub routes the messages to, based on the routing rules."]
-    #[serde(rename = "serviceBusQueues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceBusQueues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_bus_queues: Vec<RoutingServiceBusQueueEndpointProperties>,
     #[doc = "The list of Service Bus topic endpoints that the IoT hub routes the messages to, based on the routing rules."]
-    #[serde(rename = "serviceBusTopics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceBusTopics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_bus_topics: Vec<RoutingServiceBusTopicEndpointProperties>,
     #[doc = "The list of Event Hubs endpoints that IoT hub routes messages to, based on the routing rules. This list does not include the built-in Event Hubs endpoint."]
-    #[serde(rename = "eventHubs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eventHubs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub event_hubs: Vec<RoutingEventHubProperties>,
     #[doc = "The list of storage container endpoints that IoT hub routes messages to, based on the routing rules."]
-    #[serde(rename = "storageContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_containers: Vec<RoutingStorageContainerProperties>,
 }
 impl RoutingEndpoints {
@@ -2194,13 +2299,21 @@ pub struct RoutingProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub endpoints: Option<RoutingEndpoints>,
     #[doc = "The list of user-provided routing rules that the IoT hub uses to route messages to built-in and custom endpoints. A maximum of 100 routing rules are allowed for paid hubs and a maximum of 5 routing rules are allowed for free hubs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<RouteProperties>,
     #[doc = "The properties of the fallback route. IoT Hub uses these properties when it routes messages to the fallback endpoint."]
     #[serde(rename = "fallbackRoute", default, skip_serializing_if = "Option::is_none")]
     pub fallback_route: Option<FallbackRouteProperties>,
     #[doc = "The list of user-provided enrichments that the IoT hub applies to messages to be delivered to built-in and custom endpoints. See: https://aka.ms/telemetryoneventgrid"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enrichments: Vec<EnrichmentProperties>,
 }
 impl RoutingProperties {
@@ -2586,7 +2699,11 @@ pub mod shared_access_signature_authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedAccessSignatureAuthorizationRuleListResult {
     #[doc = "The list of shared access policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedAccessSignatureAuthorizationRule>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2763,7 +2880,11 @@ pub mod test_all_routes_input {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestAllRoutesResult {
     #[doc = "JSON-serialized array of matched routes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<MatchedRoute>,
 }
 impl TestAllRoutesResult {
@@ -2856,7 +2977,12 @@ pub mod test_route_result {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestRouteResultDetails {
     #[doc = "JSON-serialized list of route compilation errors"]
-    #[serde(rename = "compilationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "compilationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compilation_errors: Vec<RouteCompilationError>,
 }
 impl TestRouteResultDetails {
@@ -2894,7 +3020,11 @@ impl UserSubscriptionQuota {
 #[doc = "Json-serialized array of User subscription quota response"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserSubscriptionQuotaListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserSubscriptionQuota>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
diff --git a/services/mgmt/iothub/src/package_preview_2022_04_30/models.rs b/services/mgmt/iothub/src/package_preview_2022_04_30/models.rs
index c7c8d89ac6..3ba0146b77 100644
--- a/services/mgmt/iothub/src/package_preview_2022_04_30/models.rs
+++ b/services/mgmt/iothub/src/package_preview_2022_04_30/models.rs
@@ -89,7 +89,11 @@ impl CertificateDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListDescription {
     #[doc = "The array of Certificate objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateDescription>,
 }
 impl CertificateListDescription {
@@ -221,7 +225,12 @@ pub struct EncryptionPropertiesDescription {
     #[serde(rename = "keySource", default, skip_serializing_if = "Option::is_none")]
     pub key_source: Option<String>,
     #[doc = "The properties of the KeyVault key."]
-    #[serde(rename = "keyVaultProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyVaultProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_vault_properties: Vec<KeyVaultKeyProperties>,
 }
 impl EncryptionPropertiesDescription {
@@ -311,7 +320,11 @@ pub mod endpoint_health_data {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EndpointHealthDataListResult {
     #[doc = "JSON-serialized array of Endpoint health data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EndpointHealthData>,
     #[doc = "Link to more results"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -425,7 +438,11 @@ impl EventHubConsumerGroupName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventHubConsumerGroupsListResult {
     #[doc = "List of consumer groups objects"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventHubConsumerGroupInfo>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -452,7 +469,12 @@ pub struct EventHubProperties {
     #[serde(rename = "partitionCount", default, skip_serializing_if = "Option::is_none")]
     pub partition_count: Option<i32>,
     #[doc = "The partition ids in the Event Hub-compatible endpoint."]
-    #[serde(rename = "partitionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_ids: Vec<String>,
     #[doc = "The Event Hub-compatible name."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -675,10 +697,20 @@ pub struct GroupIdInformationProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The required members for a specific group id"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The required DNS zones for a specific group id"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl GroupIdInformationProperties {
@@ -836,7 +868,11 @@ impl IotHubDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubDescriptionListResult {
     #[doc = "The array of IotHubDescription objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotHubDescription>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -941,7 +977,12 @@ pub mod iot_hub_name_availability_info {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubProperties {
     #[doc = "The shared access policies you can use to secure a connection to the IoT hub."]
-    #[serde(rename = "authorizationPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_policies: Vec<SharedAccessSignatureAuthorizationRule>,
     #[doc = "If true, SAS tokens with Iot hub scoped SAS keys cannot be used for authentication."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -956,13 +997,23 @@ pub struct IotHubProperties {
     #[serde(rename = "restrictOutboundNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub restrict_outbound_network_access: Option<bool>,
     #[doc = "List of allowed FQDNs(Fully Qualified Domain Name) for egress from Iot Hub."]
-    #[serde(rename = "allowedFqdnList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedFqdnList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_fqdn_list: Vec<String>,
     #[doc = "Whether requests from Public Network are allowed"]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<iot_hub_properties::PublicNetworkAccess>,
     #[doc = "The IP filter rules."]
-    #[serde(rename = "ipFilterRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipFilterRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_filter_rules: Vec<IpFilterRule>,
     #[doc = "Network Rule Set Properties of IotHub"]
     #[serde(rename = "networkRuleSets", default, skip_serializing_if = "Option::is_none")]
@@ -971,7 +1022,12 @@ pub struct IotHubProperties {
     #[serde(rename = "minTlsVersion", default, skip_serializing_if = "Option::is_none")]
     pub min_tls_version: Option<String>,
     #[doc = "Private endpoint connections created on this IotHub"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1013,7 +1069,11 @@ pub struct IotHubProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<EncryptionPropertiesDescription>,
     #[doc = "Primary and secondary location for iot hub"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<IotHubLocationDescription>,
     #[doc = "This property when set to true, will enable data residency, thus, disabling disaster recovery."]
     #[serde(rename = "enableDataResidency", default, skip_serializing_if = "Option::is_none")]
@@ -1070,7 +1130,12 @@ pub mod iot_hub_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct DeviceStreams {
         #[doc = "List of Device Streams Endpoints."]
-        #[serde(rename = "streamingEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "streamingEndpoints",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub streaming_endpoints: Vec<String>,
     }
     impl DeviceStreams {
@@ -1138,7 +1203,11 @@ impl IotHubQuotaMetricInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubQuotaMetricInfoListResult {
     #[doc = "The array of quota metrics objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotHubQuotaMetricInfo>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1179,7 +1248,11 @@ impl IotHubSkuDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IotHubSkuDescriptionListResult {
     #[doc = "The array of IotHubSkuDescription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IotHubSkuDescription>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1423,7 +1496,11 @@ pub mod job_response {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobResponseListResult {
     #[doc = "The array of JobResponse objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResponse>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1698,7 +1775,11 @@ impl OperationInputs {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of IoT Hub operations supported by the Microsoft.Devices resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1775,7 +1856,11 @@ pub type PrivateEndpointConnectionsList = Vec<PrivateEndpointConnection>;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResources {
     #[doc = "The list of available private link resources for an IotHub"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GroupIdInformation>,
 }
 impl PrivateLinkResources {
@@ -2186,19 +2271,44 @@ pub mod routing_cosmos_db_sql_api_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingEndpoints {
     #[doc = "The list of Service Bus queue endpoints that IoT hub routes the messages to, based on the routing rules."]
-    #[serde(rename = "serviceBusQueues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceBusQueues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_bus_queues: Vec<RoutingServiceBusQueueEndpointProperties>,
     #[doc = "The list of Service Bus topic endpoints that the IoT hub routes the messages to, based on the routing rules."]
-    #[serde(rename = "serviceBusTopics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceBusTopics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_bus_topics: Vec<RoutingServiceBusTopicEndpointProperties>,
     #[doc = "The list of Event Hubs endpoints that IoT hub routes messages to, based on the routing rules. This list does not include the built-in Event Hubs endpoint."]
-    #[serde(rename = "eventHubs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eventHubs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub event_hubs: Vec<RoutingEventHubProperties>,
     #[doc = "The list of storage container endpoints that IoT hub routes messages to, based on the routing rules."]
-    #[serde(rename = "storageContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_containers: Vec<RoutingStorageContainerProperties>,
     #[doc = "The list of Cosmos DB collection endpoints that IoT hub routes messages to, based on the routing rules."]
-    #[serde(rename = "cosmosDBSqlCollections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cosmosDBSqlCollections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cosmos_db_sql_collections: Vec<RoutingCosmosDbSqlApiProperties>,
 }
 impl RoutingEndpoints {
@@ -2318,13 +2428,21 @@ pub struct RoutingProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub endpoints: Option<RoutingEndpoints>,
     #[doc = "The list of user-provided routing rules that the IoT hub uses to route messages to built-in and custom endpoints. A maximum of 100 routing rules are allowed for paid hubs and a maximum of 5 routing rules are allowed for free hubs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<RouteProperties>,
     #[doc = "The properties of the fallback route. IoT Hub uses these properties when it routes messages to the fallback endpoint."]
     #[serde(rename = "fallbackRoute", default, skip_serializing_if = "Option::is_none")]
     pub fallback_route: Option<FallbackRouteProperties>,
     #[doc = "The list of user-provided enrichments that the IoT hub applies to messages to be delivered to built-in and custom endpoints. See: https://aka.ms/telemetryoneventgrid"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enrichments: Vec<EnrichmentProperties>,
 }
 impl RoutingProperties {
@@ -2710,7 +2828,11 @@ pub mod shared_access_signature_authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedAccessSignatureAuthorizationRuleListResult {
     #[doc = "The list of shared access policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedAccessSignatureAuthorizationRule>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2887,7 +3009,11 @@ pub mod test_all_routes_input {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestAllRoutesResult {
     #[doc = "JSON-serialized array of matched routes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<MatchedRoute>,
 }
 impl TestAllRoutesResult {
@@ -2980,7 +3106,12 @@ pub mod test_route_result {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestRouteResultDetails {
     #[doc = "JSON-serialized list of route compilation errors"]
-    #[serde(rename = "compilationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "compilationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compilation_errors: Vec<RouteCompilationError>,
 }
 impl TestRouteResultDetails {
@@ -3018,7 +3149,11 @@ impl UserSubscriptionQuota {
 #[doc = "Json-serialized array of User subscription quota response"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserSubscriptionQuotaListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserSubscriptionQuota>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
diff --git a/services/mgmt/keyvault/src/package_preview_2021_04/models.rs b/services/mgmt/keyvault/src/package_preview_2021_04/models.rs
index e180b04762..61cfa61424 100644
--- a/services/mgmt/keyvault/src/package_preview_2021_04/models.rs
+++ b/services/mgmt/keyvault/src/package_preview_2021_04/models.rs
@@ -112,7 +112,11 @@ impl DeletedManagedHsm {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedManagedHsmListResult {
     #[doc = "The list of deleted managed HSM Pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedManagedHsm>,
     #[doc = "The URL to get the next set of deleted managed HSM Pools."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -181,7 +185,11 @@ impl DeletedVault {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedVaultListResult {
     #[doc = "The list of deleted vaults."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedVault>,
     #[doc = "The URL to get the next set of deleted vaults."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -352,10 +360,20 @@ pub struct MhsmNetworkRuleSet {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<mhsm_network_rule_set::DefaultAction>,
     #[doc = "The list of IP address rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<MhsmipRule>,
     #[doc = "The list of virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<MhsmVirtualNetworkRule>,
 }
 impl MhsmNetworkRuleSet {
@@ -554,7 +572,11 @@ impl Serialize for MhsmPrivateEndpointConnectionProvisioningState {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MhsmPrivateEndpointConnectionsListResult {
     #[doc = "The private endpoint connection associated with a managed HSM Pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MhsmPrivateEndpointConnection>,
     #[doc = "The URL to get the next set of managed HSM Pools."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -630,7 +652,11 @@ impl MhsmPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MhsmPrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MhsmPrivateLinkResource>,
 }
 impl MhsmPrivateLinkResourceListResult {
@@ -645,10 +671,20 @@ pub struct MhsmPrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required member names of private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl MhsmPrivateLinkResourceProperties {
@@ -759,7 +795,11 @@ impl ManagedHsmError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedHsmListResult {
     #[doc = "The list of managed HSM Pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedHsm>,
     #[doc = "The URL to get the next set of managed HSM Pools."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -783,7 +823,12 @@ pub struct ManagedHsmProperties {
     #[serde(rename = "tenantId", default, skip_serializing_if = "Option::is_none")]
     pub tenant_id: Option<String>,
     #[doc = "Array of initial administrators object ids for this managed hsm pool."]
-    #[serde(rename = "initialAdminObjectIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "initialAdminObjectIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub initial_admin_object_ids: Vec<String>,
     #[doc = "The URI of the managed hsm pool for performing operations on keys."]
     #[serde(rename = "hsmUri", default, skip_serializing_if = "Option::is_none")]
@@ -810,7 +855,12 @@ pub struct ManagedHsmProperties {
     #[serde(rename = "networkAcls", default, skip_serializing_if = "Option::is_none")]
     pub network_acls: Option<MhsmNetworkRuleSet>,
     #[doc = "List of private endpoint connections associated with the managed hsm pool."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<MhsmPrivateEndpointConnectionItem>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -1029,16 +1079,30 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "The supported aggregation types for the metrics."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The supported time grain types for the metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "The metric lock aggregation type."]
     #[serde(rename = "lockAggregationType", default, skip_serializing_if = "Option::is_none")]
     pub lock_aggregation_type: Option<String>,
     #[doc = "The dimensions of metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<DimensionProperties>,
     #[doc = "Property to specify whether to fill gap with zero."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -1062,10 +1126,20 @@ pub struct NetworkRuleSet {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<network_rule_set::DefaultAction>,
     #[doc = "The list of IP address rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
     #[doc = "The list of virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
 }
 impl NetworkRuleSet {
@@ -1202,7 +1276,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Storage operations supported by the Storage resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1235,16 +1313,32 @@ impl OperationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permissions {
     #[doc = "Permissions to keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<String>,
     #[doc = "Permissions to secrets"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<String>,
     #[doc = "Permissions to certificates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<String>,
     #[doc = "Permissions to storage accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage: Vec<String>,
 }
 impl Permissions {
@@ -1303,7 +1397,11 @@ impl PrivateEndpointConnectionItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The list of private endpoint connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URL to get the next set of private endpoint connections."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1442,7 +1540,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -1457,10 +1559,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required member names of private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1552,7 +1664,11 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceListResult {
     #[doc = "The list of vault resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Resource>,
     #[doc = "The URL to get the next set of vault resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1573,10 +1689,20 @@ impl ResourceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Log specifications of operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -1795,7 +1921,11 @@ impl VaultCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultListResult {
     #[doc = "The list of vaults."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vault>,
     #[doc = "The URL to get the next set of vaults."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1837,7 +1967,12 @@ pub struct VaultPatchProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<Sku>,
     #[doc = "An array of 0 to 16 identities that have access to the key vault. All identities in the array must use the same tenant ID as the key vault's tenant ID."]
-    #[serde(rename = "accessPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_policies: Vec<AccessPolicyEntry>,
     #[doc = "Property to specify whether Azure Virtual Machines are permitted to retrieve certificates stored as secrets from the key vault."]
     #[serde(rename = "enabledForDeployment", default, skip_serializing_if = "Option::is_none")]
@@ -1892,7 +2027,12 @@ pub struct VaultProperties {
     #[doc = "SKU details"]
     pub sku: Sku,
     #[doc = "An array of 0 to 1024 identities that have access to the key vault. All identities in the array must use the same tenant ID as the key vault's tenant ID. When `createMode` is set to `recover`, access policies are not required. Otherwise, access policies are required."]
-    #[serde(rename = "accessPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_policies: Vec<AccessPolicyEntry>,
     #[doc = "The URI of the vault for performing operations on keys and secrets."]
     #[serde(rename = "vaultUri", default, skip_serializing_if = "Option::is_none")]
@@ -1931,7 +2071,12 @@ pub struct VaultProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<vault_properties::ProvisioningState>,
     #[doc = "List of private endpoint connections associated with the key vault."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionItem>,
 }
 impl VaultProperties {
diff --git a/services/mgmt/keyvault/src/package_preview_2021_04_full/models.rs b/services/mgmt/keyvault/src/package_preview_2021_04_full/models.rs
index af4c758b47..c5518e754d 100644
--- a/services/mgmt/keyvault/src/package_preview_2021_04_full/models.rs
+++ b/services/mgmt/keyvault/src/package_preview_2021_04_full/models.rs
@@ -158,7 +158,11 @@ impl DeletedManagedHsm {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedManagedHsmListResult {
     #[doc = "The list of deleted managed HSM Pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedManagedHsm>,
     #[doc = "The URL to get the next set of deleted managed HSM Pools."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -227,7 +231,11 @@ impl DeletedVault {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedVaultListResult {
     #[doc = "The list of deleted vaults."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedVault>,
     #[doc = "The URL to get the next set of deleted vaults."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -468,7 +476,11 @@ impl KeyCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyListResult {
     #[doc = "The key resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Key>,
     #[doc = "The URL to get the next page of keys."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -494,7 +506,12 @@ pub struct KeyProperties {
     #[doc = "The type of the key. For valid values, see JsonWebKeyType."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kty: Option<key_properties::Kty>,
-    #[serde(rename = "keyOps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyOps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "The key size in bits. For example: 2048, 3072, or 4096 for RSA."]
     #[serde(rename = "keySize", default, skip_serializing_if = "Option::is_none")]
@@ -677,10 +694,20 @@ pub struct MhsmNetworkRuleSet {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<mhsm_network_rule_set::DefaultAction>,
     #[doc = "The list of IP address rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<MhsmipRule>,
     #[doc = "The list of virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<MhsmVirtualNetworkRule>,
 }
 impl MhsmNetworkRuleSet {
@@ -879,7 +906,11 @@ impl Serialize for MhsmPrivateEndpointConnectionProvisioningState {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MhsmPrivateEndpointConnectionsListResult {
     #[doc = "The private endpoint connection associated with a managed HSM Pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MhsmPrivateEndpointConnection>,
     #[doc = "The URL to get the next set of managed HSM Pools."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -955,7 +986,11 @@ impl MhsmPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MhsmPrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MhsmPrivateLinkResource>,
 }
 impl MhsmPrivateLinkResourceListResult {
@@ -970,10 +1005,20 @@ pub struct MhsmPrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required member names of private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl MhsmPrivateLinkResourceProperties {
@@ -1084,7 +1129,11 @@ impl ManagedHsmError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedHsmListResult {
     #[doc = "The list of managed HSM Pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedHsm>,
     #[doc = "The URL to get the next set of managed HSM Pools."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1108,7 +1157,12 @@ pub struct ManagedHsmProperties {
     #[serde(rename = "tenantId", default, skip_serializing_if = "Option::is_none")]
     pub tenant_id: Option<String>,
     #[doc = "Array of initial administrators object ids for this managed hsm pool."]
-    #[serde(rename = "initialAdminObjectIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "initialAdminObjectIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub initial_admin_object_ids: Vec<String>,
     #[doc = "The URI of the managed hsm pool for performing operations on keys."]
     #[serde(rename = "hsmUri", default, skip_serializing_if = "Option::is_none")]
@@ -1135,7 +1189,12 @@ pub struct ManagedHsmProperties {
     #[serde(rename = "networkAcls", default, skip_serializing_if = "Option::is_none")]
     pub network_acls: Option<MhsmNetworkRuleSet>,
     #[doc = "List of private endpoint connections associated with the managed hsm pool."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<MhsmPrivateEndpointConnectionItem>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -1354,16 +1413,30 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "The supported aggregation types for the metrics."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The supported time grain types for the metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "The metric lock aggregation type."]
     #[serde(rename = "lockAggregationType", default, skip_serializing_if = "Option::is_none")]
     pub lock_aggregation_type: Option<String>,
     #[doc = "The dimensions of metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<DimensionProperties>,
     #[doc = "Property to specify whether to fill gap with zero."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -1387,10 +1460,20 @@ pub struct NetworkRuleSet {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<network_rule_set::DefaultAction>,
     #[doc = "The list of IP address rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
     #[doc = "The list of virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
 }
 impl NetworkRuleSet {
@@ -1527,7 +1610,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Storage operations supported by the Storage resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1560,16 +1647,32 @@ impl OperationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permissions {
     #[doc = "Permissions to keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<String>,
     #[doc = "Permissions to secrets"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<String>,
     #[doc = "Permissions to certificates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<String>,
     #[doc = "Permissions to storage accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage: Vec<String>,
 }
 impl Permissions {
@@ -1628,7 +1731,11 @@ impl PrivateEndpointConnectionItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The list of private endpoint connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URL to get the next set of private endpoint connections."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1767,7 +1874,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -1782,10 +1893,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required member names of private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1877,7 +1998,11 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceListResult {
     #[doc = "The list of vault resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Resource>,
     #[doc = "The URL to get the next set of vault resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1899,7 +2024,12 @@ pub struct RotationPolicy {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub attributes: Option<KeyRotationPolicyAttributes>,
     #[doc = "The lifetimeActions for key rotation action."]
-    #[serde(rename = "lifetimeActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "lifetimeActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub lifetime_actions: Vec<LifetimeAction>,
 }
 impl RotationPolicy {
@@ -1952,7 +2082,11 @@ impl SecretCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecretListResult {
     #[doc = "The list of secrets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Secret>,
     #[doc = "The URL to get the next set of secrets."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2030,10 +2164,20 @@ impl SecretProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Log specifications of operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -2266,7 +2410,11 @@ impl VaultCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultListResult {
     #[doc = "The list of vaults."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vault>,
     #[doc = "The URL to get the next set of vaults."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2308,7 +2456,12 @@ pub struct VaultPatchProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<Sku>,
     #[doc = "An array of 0 to 16 identities that have access to the key vault. All identities in the array must use the same tenant ID as the key vault's tenant ID."]
-    #[serde(rename = "accessPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_policies: Vec<AccessPolicyEntry>,
     #[doc = "Property to specify whether Azure Virtual Machines are permitted to retrieve certificates stored as secrets from the key vault."]
     #[serde(rename = "enabledForDeployment", default, skip_serializing_if = "Option::is_none")]
@@ -2363,7 +2516,12 @@ pub struct VaultProperties {
     #[doc = "SKU details"]
     pub sku: Sku,
     #[doc = "An array of 0 to 1024 identities that have access to the key vault. All identities in the array must use the same tenant ID as the key vault's tenant ID. When `createMode` is set to `recover`, access policies are not required. Otherwise, access policies are required."]
-    #[serde(rename = "accessPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_policies: Vec<AccessPolicyEntry>,
     #[doc = "The URI of the vault for performing operations on keys and secrets."]
     #[serde(rename = "vaultUri", default, skip_serializing_if = "Option::is_none")]
@@ -2402,7 +2560,12 @@ pub struct VaultProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<vault_properties::ProvisioningState>,
     #[doc = "List of private endpoint connections associated with the key vault."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionItem>,
 }
 impl VaultProperties {
diff --git a/services/mgmt/keyvault/src/package_preview_2021_06/models.rs b/services/mgmt/keyvault/src/package_preview_2021_06/models.rs
index 38efb9a651..c837dcfb5d 100644
--- a/services/mgmt/keyvault/src/package_preview_2021_06/models.rs
+++ b/services/mgmt/keyvault/src/package_preview_2021_06/models.rs
@@ -158,7 +158,11 @@ impl DeletedManagedHsm {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedManagedHsmListResult {
     #[doc = "The list of deleted managed HSM Pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedManagedHsm>,
     #[doc = "The URL to get the next set of deleted managed HSM Pools."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -227,7 +231,11 @@ impl DeletedVault {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedVaultListResult {
     #[doc = "The list of deleted vaults."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedVault>,
     #[doc = "The URL to get the next set of deleted vaults."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -471,7 +479,11 @@ impl KeyCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyListResult {
     #[doc = "The key resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Key>,
     #[doc = "The URL to get the next page of keys."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -497,7 +509,12 @@ pub struct KeyProperties {
     #[doc = "The type of the key. For valid values, see JsonWebKeyType."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kty: Option<key_properties::Kty>,
-    #[serde(rename = "keyOps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyOps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "The key size in bits. For example: 2048, 3072, or 4096 for RSA."]
     #[serde(rename = "keySize", default, skip_serializing_if = "Option::is_none")]
@@ -696,10 +713,20 @@ pub struct MhsmNetworkRuleSet {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<mhsm_network_rule_set::DefaultAction>,
     #[doc = "The list of IP address rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<MhsmipRule>,
     #[doc = "The list of virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<MhsmVirtualNetworkRule>,
 }
 impl MhsmNetworkRuleSet {
@@ -898,7 +925,11 @@ impl Serialize for MhsmPrivateEndpointConnectionProvisioningState {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MhsmPrivateEndpointConnectionsListResult {
     #[doc = "The private endpoint connection associated with a managed HSM Pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MhsmPrivateEndpointConnection>,
     #[doc = "The URL to get the next set of managed HSM Pools."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -974,7 +1005,11 @@ impl MhsmPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MhsmPrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MhsmPrivateLinkResource>,
 }
 impl MhsmPrivateLinkResourceListResult {
@@ -989,10 +1024,20 @@ pub struct MhsmPrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required member names of private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl MhsmPrivateLinkResourceProperties {
@@ -1103,7 +1148,11 @@ impl ManagedHsmError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedHsmListResult {
     #[doc = "The list of managed HSM Pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedHsm>,
     #[doc = "The URL to get the next set of managed HSM Pools."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1127,7 +1176,12 @@ pub struct ManagedHsmProperties {
     #[serde(rename = "tenantId", default, skip_serializing_if = "Option::is_none")]
     pub tenant_id: Option<String>,
     #[doc = "Array of initial administrators object ids for this managed hsm pool."]
-    #[serde(rename = "initialAdminObjectIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "initialAdminObjectIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub initial_admin_object_ids: Vec<String>,
     #[doc = "The URI of the managed hsm pool for performing operations on keys."]
     #[serde(rename = "hsmUri", default, skip_serializing_if = "Option::is_none")]
@@ -1154,7 +1208,12 @@ pub struct ManagedHsmProperties {
     #[serde(rename = "networkAcls", default, skip_serializing_if = "Option::is_none")]
     pub network_acls: Option<MhsmNetworkRuleSet>,
     #[doc = "List of private endpoint connections associated with the managed hsm pool."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<MhsmPrivateEndpointConnectionItem>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -1373,16 +1432,30 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "The supported aggregation types for the metrics."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The supported time grain types for the metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "The metric lock aggregation type."]
     #[serde(rename = "lockAggregationType", default, skip_serializing_if = "Option::is_none")]
     pub lock_aggregation_type: Option<String>,
     #[doc = "The dimensions of metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<DimensionProperties>,
     #[doc = "Property to specify whether to fill gap with zero."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -1406,10 +1479,20 @@ pub struct NetworkRuleSet {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<network_rule_set::DefaultAction>,
     #[doc = "The list of IP address rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
     #[doc = "The list of virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
 }
 impl NetworkRuleSet {
@@ -1546,7 +1629,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Storage operations supported by the Storage resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1579,16 +1666,32 @@ impl OperationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permissions {
     #[doc = "Permissions to keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<String>,
     #[doc = "Permissions to secrets"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<String>,
     #[doc = "Permissions to certificates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<String>,
     #[doc = "Permissions to storage accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage: Vec<String>,
 }
 impl Permissions {
@@ -1647,7 +1750,11 @@ impl PrivateEndpointConnectionItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The list of private endpoint connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URL to get the next set of private endpoint connections."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1786,7 +1893,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -1801,10 +1912,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required member names of private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1896,7 +2017,11 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceListResult {
     #[doc = "The list of vault resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Resource>,
     #[doc = "The URL to get the next set of vault resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1918,7 +2043,12 @@ pub struct RotationPolicy {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub attributes: Option<KeyRotationPolicyAttributes>,
     #[doc = "The lifetimeActions for key rotation action."]
-    #[serde(rename = "lifetimeActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "lifetimeActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub lifetime_actions: Vec<LifetimeAction>,
 }
 impl RotationPolicy {
@@ -1971,7 +2101,11 @@ impl SecretCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecretListResult {
     #[doc = "The list of secrets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Secret>,
     #[doc = "The URL to get the next set of secrets."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2049,10 +2183,20 @@ impl SecretProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Log specifications of operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -2285,7 +2429,11 @@ impl VaultCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultListResult {
     #[doc = "The list of vaults."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vault>,
     #[doc = "The URL to get the next set of vaults."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2327,7 +2475,12 @@ pub struct VaultPatchProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<Sku>,
     #[doc = "An array of 0 to 16 identities that have access to the key vault. All identities in the array must use the same tenant ID as the key vault's tenant ID."]
-    #[serde(rename = "accessPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_policies: Vec<AccessPolicyEntry>,
     #[doc = "Property to specify whether Azure Virtual Machines are permitted to retrieve certificates stored as secrets from the key vault."]
     #[serde(rename = "enabledForDeployment", default, skip_serializing_if = "Option::is_none")]
@@ -2385,7 +2538,12 @@ pub struct VaultProperties {
     #[doc = "SKU details"]
     pub sku: Sku,
     #[doc = "An array of 0 to 1024 identities that have access to the key vault. All identities in the array must use the same tenant ID as the key vault's tenant ID. When `createMode` is set to `recover`, access policies are not required. Otherwise, access policies are required."]
-    #[serde(rename = "accessPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_policies: Vec<AccessPolicyEntry>,
     #[doc = "The URI of the vault for performing operations on keys and secrets."]
     #[serde(rename = "vaultUri", default, skip_serializing_if = "Option::is_none")]
@@ -2424,7 +2582,12 @@ pub struct VaultProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<vault_properties::ProvisioningState>,
     #[doc = "List of private endpoint connections associated with the key vault."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionItem>,
     #[doc = "Property to specify whether the vault will accept traffic from public internet. If set to 'disabled' all traffic except private endpoint traffic and that that originates from trusted services will be blocked. This will override the set firewall rules, meaning that even if the firewall rules are present we will not honor the rules."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/keyvault/src/package_preview_2021_11/models.rs b/services/mgmt/keyvault/src/package_preview_2021_11/models.rs
index 38efb9a651..c837dcfb5d 100644
--- a/services/mgmt/keyvault/src/package_preview_2021_11/models.rs
+++ b/services/mgmt/keyvault/src/package_preview_2021_11/models.rs
@@ -158,7 +158,11 @@ impl DeletedManagedHsm {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedManagedHsmListResult {
     #[doc = "The list of deleted managed HSM Pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedManagedHsm>,
     #[doc = "The URL to get the next set of deleted managed HSM Pools."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -227,7 +231,11 @@ impl DeletedVault {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedVaultListResult {
     #[doc = "The list of deleted vaults."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedVault>,
     #[doc = "The URL to get the next set of deleted vaults."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -471,7 +479,11 @@ impl KeyCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyListResult {
     #[doc = "The key resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Key>,
     #[doc = "The URL to get the next page of keys."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -497,7 +509,12 @@ pub struct KeyProperties {
     #[doc = "The type of the key. For valid values, see JsonWebKeyType."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kty: Option<key_properties::Kty>,
-    #[serde(rename = "keyOps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyOps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "The key size in bits. For example: 2048, 3072, or 4096 for RSA."]
     #[serde(rename = "keySize", default, skip_serializing_if = "Option::is_none")]
@@ -696,10 +713,20 @@ pub struct MhsmNetworkRuleSet {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<mhsm_network_rule_set::DefaultAction>,
     #[doc = "The list of IP address rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<MhsmipRule>,
     #[doc = "The list of virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<MhsmVirtualNetworkRule>,
 }
 impl MhsmNetworkRuleSet {
@@ -898,7 +925,11 @@ impl Serialize for MhsmPrivateEndpointConnectionProvisioningState {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MhsmPrivateEndpointConnectionsListResult {
     #[doc = "The private endpoint connection associated with a managed HSM Pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MhsmPrivateEndpointConnection>,
     #[doc = "The URL to get the next set of managed HSM Pools."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -974,7 +1005,11 @@ impl MhsmPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MhsmPrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MhsmPrivateLinkResource>,
 }
 impl MhsmPrivateLinkResourceListResult {
@@ -989,10 +1024,20 @@ pub struct MhsmPrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required member names of private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl MhsmPrivateLinkResourceProperties {
@@ -1103,7 +1148,11 @@ impl ManagedHsmError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedHsmListResult {
     #[doc = "The list of managed HSM Pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedHsm>,
     #[doc = "The URL to get the next set of managed HSM Pools."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1127,7 +1176,12 @@ pub struct ManagedHsmProperties {
     #[serde(rename = "tenantId", default, skip_serializing_if = "Option::is_none")]
     pub tenant_id: Option<String>,
     #[doc = "Array of initial administrators object ids for this managed hsm pool."]
-    #[serde(rename = "initialAdminObjectIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "initialAdminObjectIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub initial_admin_object_ids: Vec<String>,
     #[doc = "The URI of the managed hsm pool for performing operations on keys."]
     #[serde(rename = "hsmUri", default, skip_serializing_if = "Option::is_none")]
@@ -1154,7 +1208,12 @@ pub struct ManagedHsmProperties {
     #[serde(rename = "networkAcls", default, skip_serializing_if = "Option::is_none")]
     pub network_acls: Option<MhsmNetworkRuleSet>,
     #[doc = "List of private endpoint connections associated with the managed hsm pool."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<MhsmPrivateEndpointConnectionItem>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -1373,16 +1432,30 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "The supported aggregation types for the metrics."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The supported time grain types for the metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "The metric lock aggregation type."]
     #[serde(rename = "lockAggregationType", default, skip_serializing_if = "Option::is_none")]
     pub lock_aggregation_type: Option<String>,
     #[doc = "The dimensions of metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<DimensionProperties>,
     #[doc = "Property to specify whether to fill gap with zero."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -1406,10 +1479,20 @@ pub struct NetworkRuleSet {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<network_rule_set::DefaultAction>,
     #[doc = "The list of IP address rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
     #[doc = "The list of virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
 }
 impl NetworkRuleSet {
@@ -1546,7 +1629,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Storage operations supported by the Storage resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1579,16 +1666,32 @@ impl OperationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permissions {
     #[doc = "Permissions to keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<String>,
     #[doc = "Permissions to secrets"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<String>,
     #[doc = "Permissions to certificates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<String>,
     #[doc = "Permissions to storage accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage: Vec<String>,
 }
 impl Permissions {
@@ -1647,7 +1750,11 @@ impl PrivateEndpointConnectionItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The list of private endpoint connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URL to get the next set of private endpoint connections."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1786,7 +1893,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -1801,10 +1912,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required member names of private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1896,7 +2017,11 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceListResult {
     #[doc = "The list of vault resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Resource>,
     #[doc = "The URL to get the next set of vault resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1918,7 +2043,12 @@ pub struct RotationPolicy {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub attributes: Option<KeyRotationPolicyAttributes>,
     #[doc = "The lifetimeActions for key rotation action."]
-    #[serde(rename = "lifetimeActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "lifetimeActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub lifetime_actions: Vec<LifetimeAction>,
 }
 impl RotationPolicy {
@@ -1971,7 +2101,11 @@ impl SecretCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecretListResult {
     #[doc = "The list of secrets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Secret>,
     #[doc = "The URL to get the next set of secrets."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2049,10 +2183,20 @@ impl SecretProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Log specifications of operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -2285,7 +2429,11 @@ impl VaultCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultListResult {
     #[doc = "The list of vaults."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vault>,
     #[doc = "The URL to get the next set of vaults."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2327,7 +2475,12 @@ pub struct VaultPatchProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<Sku>,
     #[doc = "An array of 0 to 16 identities that have access to the key vault. All identities in the array must use the same tenant ID as the key vault's tenant ID."]
-    #[serde(rename = "accessPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_policies: Vec<AccessPolicyEntry>,
     #[doc = "Property to specify whether Azure Virtual Machines are permitted to retrieve certificates stored as secrets from the key vault."]
     #[serde(rename = "enabledForDeployment", default, skip_serializing_if = "Option::is_none")]
@@ -2385,7 +2538,12 @@ pub struct VaultProperties {
     #[doc = "SKU details"]
     pub sku: Sku,
     #[doc = "An array of 0 to 1024 identities that have access to the key vault. All identities in the array must use the same tenant ID as the key vault's tenant ID. When `createMode` is set to `recover`, access policies are not required. Otherwise, access policies are required."]
-    #[serde(rename = "accessPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_policies: Vec<AccessPolicyEntry>,
     #[doc = "The URI of the vault for performing operations on keys and secrets."]
     #[serde(rename = "vaultUri", default, skip_serializing_if = "Option::is_none")]
@@ -2424,7 +2582,12 @@ pub struct VaultProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<vault_properties::ProvisioningState>,
     #[doc = "List of private endpoint connections associated with the key vault."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionItem>,
     #[doc = "Property to specify whether the vault will accept traffic from public internet. If set to 'disabled' all traffic except private endpoint traffic and that that originates from trusted services will be blocked. This will override the set firewall rules, meaning that even if the firewall rules are present we will not honor the rules."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/keyvault/src/profile_hybrid_2020_09_01/models.rs b/services/mgmt/keyvault/src/profile_hybrid_2020_09_01/models.rs
index a18f0e6eb4..388492633d 100644
--- a/services/mgmt/keyvault/src/profile_hybrid_2020_09_01/models.rs
+++ b/services/mgmt/keyvault/src/profile_hybrid_2020_09_01/models.rs
@@ -137,7 +137,11 @@ impl DeletedVault {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedVaultListResult {
     #[doc = "The list of deleted vaults."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedVault>,
     #[doc = "The URL to get the next set of deleted vaults."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -247,16 +251,30 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "The supported aggregation types for the metrics."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The supported time grain types for the metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "The metric lock aggregation type."]
     #[serde(rename = "lockAggregationType", default, skip_serializing_if = "Option::is_none")]
     pub lock_aggregation_type: Option<String>,
     #[doc = "The dimensions of metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<DimensionProperties>,
     #[doc = "Property to specify whether to fill gap with zero."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
@@ -280,10 +298,20 @@ pub struct NetworkRuleSet {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<network_rule_set::DefaultAction>,
     #[doc = "The list of IP address rules."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
     #[doc = "The list of virtual network rules."]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
 }
 impl NetworkRuleSet {
@@ -420,7 +448,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Storage operations supported by the Storage resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -453,16 +485,32 @@ impl OperationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permissions {
     #[doc = "Permissions to keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<String>,
     #[doc = "Permissions to secrets"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<String>,
     #[doc = "Permissions to certificates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificates: Vec<String>,
     #[doc = "Permissions to storage accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage: Vec<String>,
 }
 impl Permissions {
@@ -639,7 +687,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -654,10 +706,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required member names of private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -711,7 +773,11 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceListResult {
     #[doc = "The list of vault resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Resource>,
     #[doc = "The URL to get the next set of vault resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -773,7 +839,11 @@ impl SecretCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecretListResult {
     #[doc = "The list of secrets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Secret>,
     #[doc = "The URL to get the next set of secrets."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -851,10 +921,20 @@ impl SecretProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Log specifications of operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -1042,7 +1122,11 @@ impl VaultCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultListResult {
     #[doc = "The list of vaults."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vault>,
     #[doc = "The URL to get the next set of vaults."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1084,7 +1168,12 @@ pub struct VaultPatchProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<Sku>,
     #[doc = "An array of 0 to 16 identities that have access to the key vault. All identities in the array must use the same tenant ID as the key vault's tenant ID."]
-    #[serde(rename = "accessPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_policies: Vec<AccessPolicyEntry>,
     #[doc = "Property to specify whether Azure Virtual Machines are permitted to retrieve certificates stored as secrets from the key vault."]
     #[serde(rename = "enabledForDeployment", default, skip_serializing_if = "Option::is_none")]
@@ -1139,7 +1228,12 @@ pub struct VaultProperties {
     #[doc = "SKU details"]
     pub sku: Sku,
     #[doc = "An array of 0 to 1024 identities that have access to the key vault. All identities in the array must use the same tenant ID as the key vault's tenant ID. When `createMode` is set to `recover`, access policies are not required. Otherwise, access policies are required."]
-    #[serde(rename = "accessPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_policies: Vec<AccessPolicyEntry>,
     #[doc = "The URI of the vault for performing operations on keys and secrets. This property is readonly"]
     #[serde(rename = "vaultUri", default, skip_serializing_if = "Option::is_none")]
@@ -1178,7 +1272,12 @@ pub struct VaultProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<vault_properties::ProvisioningState>,
     #[doc = "List of private endpoint connections associated with the key vault."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionItem>,
 }
 impl VaultProperties {
diff --git a/services/mgmt/kubernetesconfiguration/src/package_2022_07/models.rs b/services/mgmt/kubernetesconfiguration/src/package_2022_07/models.rs
index 640564c767..04af0f1af9 100644
--- a/services/mgmt/kubernetesconfiguration/src/package_2022_07/models.rs
+++ b/services/mgmt/kubernetesconfiguration/src/package_2022_07/models.rs
@@ -279,10 +279,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -361,7 +370,11 @@ pub mod extension {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<ProvisioningStateDefinition>,
         #[doc = "Status from this extension."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub statuses: Vec<ExtensionStatus>,
         #[doc = "The error detail."]
         #[serde(rename = "errorInfo", default, skip_serializing_if = "Option::is_none")]
@@ -487,7 +500,11 @@ pub mod extension_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionsList {
     #[doc = "List of Extensions within a Kubernetes cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Extension>,
     #[doc = "URL to get the next set of extension objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -603,7 +620,11 @@ pub mod flux_configuration {
         #[serde(rename = "configurationProtectedSettings", default, skip_serializing_if = "Option::is_none")]
         pub configuration_protected_settings: Option<serde_json::Value>,
         #[doc = "Statuses of the Flux Kubernetes resources created by the fluxConfiguration or created by the managed objects provisioned by the fluxConfiguration."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub statuses: Vec<ObjectStatusDefinition>,
         #[doc = "Public Key associated with this fluxConfiguration (either generated within the cluster or provided by the user)."]
         #[serde(rename = "repositoryPublicKey", default, skip_serializing_if = "Option::is_none")]
@@ -682,7 +703,11 @@ pub mod flux_configuration_patch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FluxConfigurationsList {
     #[doc = "List of Flux Configurations within a Kubernetes cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FluxConfiguration>,
     #[doc = "URL to get the next set of configuration objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -840,7 +865,12 @@ pub struct KustomizationDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Specifies other Kustomizations that this Kustomization depends on. This Kustomization will not reconcile until all dependencies have completed their reconciliation."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<String>,
     #[doc = "The maximum time to attempt to reconcile the Kustomization on the cluster."]
     #[serde(rename = "timeoutInSeconds", default, skip_serializing_if = "Option::is_none")]
@@ -870,7 +900,12 @@ pub struct KustomizationPatchDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Specifies other Kustomizations that this Kustomization depends on. This Kustomization will not reconcile until all dependencies have completed their reconciliation."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<String>,
     #[doc = "The maximum time to attempt to reconcile the Kustomization on the cluster."]
     #[serde(rename = "timeoutInSeconds", default, skip_serializing_if = "Option::is_none")]
@@ -1022,7 +1057,12 @@ pub struct ObjectStatusDefinition {
     #[serde(rename = "appliedBy", default, skip_serializing_if = "Option::is_none")]
     pub applied_by: Option<ObjectReferenceDefinition>,
     #[doc = "List of Kubernetes object status conditions present on the cluster"]
-    #[serde(rename = "statusConditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusConditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_conditions: Vec<ObjectStatusConditionDefinition>,
     #[doc = "Properties for HelmRelease objects"]
     #[serde(rename = "helmReleaseProperties", default, skip_serializing_if = "Option::is_none")]
@@ -1037,7 +1077,11 @@ impl ObjectStatusDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationStatusList {
     #[doc = "List of async operations in progress, in the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationStatusResult>,
     #[doc = "URL to get the next set of Operation Result objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1306,7 +1350,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
     #[doc = "URL to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1578,7 +1626,11 @@ pub mod source_control_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlConfigurationList {
     #[doc = "List of Source Control Configurations within a Kubernetes cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControlConfiguration>,
     #[doc = "URL to get the next set of configuration objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/kubernetesconfiguration/src/package_preview_2021_11/models.rs b/services/mgmt/kubernetesconfiguration/src/package_preview_2021_11/models.rs
index 1368b78988..de1192ccd2 100644
--- a/services/mgmt/kubernetesconfiguration/src/package_preview_2021_11/models.rs
+++ b/services/mgmt/kubernetesconfiguration/src/package_preview_2021_11/models.rs
@@ -191,10 +191,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -270,7 +279,11 @@ pub mod extension {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<ProvisioningStateDefinition>,
         #[doc = "Status from this extension."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub statuses: Vec<ExtensionStatus>,
         #[doc = "The error detail."]
         #[serde(rename = "errorInfo", default, skip_serializing_if = "Option::is_none")]
@@ -412,7 +425,11 @@ impl ExtensionType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionTypeList {
     #[doc = "The list of Extension Types"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtensionType>,
     #[doc = "The link to fetch the next page of Extension Types"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -433,7 +450,12 @@ impl ExtensionTypeList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionTypeProperties {
     #[doc = "Extension release train: preview or stable"]
-    #[serde(rename = "releaseTrains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "releaseTrains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub release_trains: Vec<String>,
     #[doc = "Cluster types"]
     #[serde(rename = "clusterTypes", default, skip_serializing_if = "Option::is_none")]
@@ -462,7 +484,11 @@ pub mod extension_type_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionVersionList {
     #[doc = "Versions available for this Extension Type"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub versions: Vec<serde_json::Value>,
     #[doc = "The link to fetch the next page of Extension Types"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -486,7 +512,11 @@ impl ExtensionVersionList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionsList {
     #[doc = "List of Extensions within a Kubernetes cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Extension>,
     #[doc = "URL to get the next set of extension objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -596,7 +626,11 @@ pub mod flux_configuration {
         #[serde(rename = "configurationProtectedSettings", default, skip_serializing_if = "Option::is_none")]
         pub configuration_protected_settings: Option<serde_json::Value>,
         #[doc = "Statuses of the Flux Kubernetes resources created by the fluxConfiguration or created by the managed objects provisioned by the fluxConfiguration."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub statuses: Vec<ObjectStatusDefinition>,
         #[doc = "Public Key associated with this fluxConfiguration (either generated within the cluster or provided by the user)."]
         #[serde(rename = "repositoryPublicKey", default, skip_serializing_if = "Option::is_none")]
@@ -666,7 +700,11 @@ pub mod flux_configuration_patch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FluxConfigurationsList {
     #[doc = "List of Flux Configurations within a Kubernetes cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FluxConfiguration>,
     #[doc = "URL to get the next set of configuration objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -787,7 +825,12 @@ pub struct KustomizationDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Specifies other Kustomizations that this Kustomization depends on. This Kustomization will not reconcile until all dependencies have completed their reconciliation."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<DependsOnDefinition>,
     #[doc = "The maximum time to attempt to reconcile the Kustomization on the cluster."]
     #[serde(rename = "timeoutInSeconds", default, skip_serializing_if = "Option::is_none")]
@@ -918,7 +961,12 @@ pub struct ObjectStatusDefinition {
     #[serde(rename = "appliedBy", default, skip_serializing_if = "Option::is_none")]
     pub applied_by: Option<ObjectReferenceDefinition>,
     #[doc = "List of Kubernetes object status conditions present on the cluster"]
-    #[serde(rename = "statusConditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusConditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_conditions: Vec<ObjectStatusConditionDefinition>,
     #[serde(rename = "helmReleaseProperties", default, skip_serializing_if = "Option::is_none")]
     pub helm_release_properties: Option<HelmReleasePropertiesDefinition>,
@@ -932,7 +980,11 @@ impl ObjectStatusDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationStatusList {
     #[doc = "List of async operations in progress, in the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationStatusResult>,
     #[doc = "URL to get the next set of Operation Result objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1201,7 +1253,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
     #[doc = "URL to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1419,7 +1475,11 @@ pub mod source_control_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlConfigurationList {
     #[doc = "List of Source Control Configurations within a Kubernetes cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControlConfiguration>,
     #[doc = "URL to get the next set of configuration objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/kubernetesconfiguration/src/package_preview_2022_01/models.rs b/services/mgmt/kubernetesconfiguration/src/package_preview_2022_01/models.rs
index 248a108282..8d9aaaacb7 100644
--- a/services/mgmt/kubernetesconfiguration/src/package_preview_2022_01/models.rs
+++ b/services/mgmt/kubernetesconfiguration/src/package_preview_2022_01/models.rs
@@ -251,10 +251,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -330,7 +339,11 @@ pub mod extension {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<ProvisioningStateDefinition>,
         #[doc = "Status from this extension."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub statuses: Vec<ExtensionStatus>,
         #[doc = "The error detail."]
         #[serde(rename = "errorInfo", default, skip_serializing_if = "Option::is_none")]
@@ -472,7 +485,11 @@ impl ExtensionType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionTypeList {
     #[doc = "The list of Extension Types"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtensionType>,
     #[doc = "The link to fetch the next page of Extension Types"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -493,7 +510,12 @@ impl ExtensionTypeList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionTypeProperties {
     #[doc = "Extension release train: preview or stable"]
-    #[serde(rename = "releaseTrains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "releaseTrains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub release_trains: Vec<String>,
     #[doc = "Cluster types"]
     #[serde(rename = "clusterTypes", default, skip_serializing_if = "Option::is_none")]
@@ -522,7 +544,11 @@ pub mod extension_type_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionVersionList {
     #[doc = "Versions available for this Extension Type"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub versions: Vec<serde_json::Value>,
     #[doc = "The link to fetch the next page of Extension Types"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -546,7 +572,11 @@ impl ExtensionVersionList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionsList {
     #[doc = "List of Extensions within a Kubernetes cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Extension>,
     #[doc = "URL to get the next set of extension objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -659,7 +689,11 @@ pub mod flux_configuration {
         #[serde(rename = "configurationProtectedSettings", default, skip_serializing_if = "Option::is_none")]
         pub configuration_protected_settings: Option<serde_json::Value>,
         #[doc = "Statuses of the Flux Kubernetes resources created by the fluxConfiguration or created by the managed objects provisioned by the fluxConfiguration."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub statuses: Vec<ObjectStatusDefinition>,
         #[doc = "Public Key associated with this fluxConfiguration (either generated within the cluster or provided by the user)."]
         #[serde(rename = "repositoryPublicKey", default, skip_serializing_if = "Option::is_none")]
@@ -732,7 +766,11 @@ pub mod flux_configuration_patch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FluxConfigurationsList {
     #[doc = "List of Flux Configurations within a Kubernetes cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FluxConfiguration>,
     #[doc = "URL to get the next set of configuration objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -886,7 +924,12 @@ pub struct KustomizationDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Specifies other Kustomizations that this Kustomization depends on. This Kustomization will not reconcile until all dependencies have completed their reconciliation."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<DependsOnDefinition>,
     #[doc = "The maximum time to attempt to reconcile the Kustomization on the cluster."]
     #[serde(rename = "timeoutInSeconds", default, skip_serializing_if = "Option::is_none")]
@@ -916,7 +959,12 @@ pub struct KustomizationPatchDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Specifies other Kustomizations that this Kustomization depends on. This Kustomization will not reconcile until all dependencies have completed their reconciliation."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<DependsOnDefinition>,
     #[doc = "The maximum time to attempt to reconcile the Kustomization on the cluster."]
     #[serde(rename = "timeoutInSeconds", default, skip_serializing_if = "Option::is_none")]
@@ -1044,7 +1092,12 @@ pub struct ObjectStatusDefinition {
     #[serde(rename = "appliedBy", default, skip_serializing_if = "Option::is_none")]
     pub applied_by: Option<ObjectReferenceDefinition>,
     #[doc = "List of Kubernetes object status conditions present on the cluster"]
-    #[serde(rename = "statusConditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusConditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_conditions: Vec<ObjectStatusConditionDefinition>,
     #[serde(rename = "helmReleaseProperties", default, skip_serializing_if = "Option::is_none")]
     pub helm_release_properties: Option<HelmReleasePropertiesDefinition>,
@@ -1058,7 +1111,11 @@ impl ObjectStatusDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationStatusList {
     #[doc = "List of async operations in progress, in the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationStatusResult>,
     #[doc = "URL to get the next set of Operation Result objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1327,7 +1384,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
     #[doc = "URL to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1545,7 +1606,11 @@ pub mod source_control_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlConfigurationList {
     #[doc = "List of Source Control Configurations within a Kubernetes cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControlConfiguration>,
     #[doc = "URL to get the next set of configuration objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/kubernetesconfiguration/src/package_preview_2022_01_15/models.rs b/services/mgmt/kubernetesconfiguration/src/package_preview_2022_01_15/models.rs
index cc55fb409c..524616fdcb 100644
--- a/services/mgmt/kubernetesconfiguration/src/package_preview_2022_01_15/models.rs
+++ b/services/mgmt/kubernetesconfiguration/src/package_preview_2022_01_15/models.rs
@@ -234,10 +234,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -313,7 +322,11 @@ pub mod extension {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<ProvisioningStateDefinition>,
         #[doc = "Status from this extension."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub statuses: Vec<ExtensionStatus>,
         #[doc = "The error detail."]
         #[serde(rename = "errorInfo", default, skip_serializing_if = "Option::is_none")]
@@ -458,7 +471,11 @@ impl ExtensionType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionTypeList {
     #[doc = "The list of Extension Types"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtensionType>,
     #[doc = "The link to fetch the next page of Extension Types"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -479,10 +496,20 @@ impl ExtensionTypeList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionTypeProperties {
     #[doc = "Extension release train: preview or stable"]
-    #[serde(rename = "releaseTrains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "releaseTrains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub release_trains: Vec<String>,
     #[doc = "Cluster types"]
-    #[serde(rename = "clusterTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_types: Vec<String>,
     #[doc = "Extension scopes"]
     #[serde(rename = "supportedScopes", default, skip_serializing_if = "Option::is_none")]
@@ -497,7 +524,11 @@ impl ExtensionTypeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionVersionList {
     #[doc = "Versions available for this Extension Type"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<serde_json::Value>,
     #[doc = "The link to fetch the next page of Extension Types"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -521,7 +552,11 @@ impl ExtensionVersionList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionsList {
     #[doc = "List of Extensions within a Kubernetes cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Extension>,
     #[doc = "URL to get the next set of extension objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -634,7 +669,11 @@ pub mod flux_configuration {
         #[serde(rename = "configurationProtectedSettings", default, skip_serializing_if = "Option::is_none")]
         pub configuration_protected_settings: Option<serde_json::Value>,
         #[doc = "Statuses of the Flux Kubernetes resources created by the fluxConfiguration or created by the managed objects provisioned by the fluxConfiguration."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub statuses: Vec<ObjectStatusDefinition>,
         #[doc = "Public Key associated with this fluxConfiguration (either generated within the cluster or provided by the user)."]
         #[serde(rename = "repositoryPublicKey", default, skip_serializing_if = "Option::is_none")]
@@ -707,7 +746,11 @@ pub mod flux_configuration_patch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FluxConfigurationsList {
     #[doc = "List of Flux Configurations within a Kubernetes cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FluxConfiguration>,
     #[doc = "URL to get the next set of configuration objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -861,7 +904,12 @@ pub struct KustomizationDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Specifies other Kustomizations that this Kustomization depends on. This Kustomization will not reconcile until all dependencies have completed their reconciliation."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<DependsOnDefinition>,
     #[doc = "The maximum time to attempt to reconcile the Kustomization on the cluster."]
     #[serde(rename = "timeoutInSeconds", default, skip_serializing_if = "Option::is_none")]
@@ -891,7 +939,12 @@ pub struct KustomizationPatchDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Specifies other Kustomizations that this Kustomization depends on. This Kustomization will not reconcile until all dependencies have completed their reconciliation."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<DependsOnDefinition>,
     #[doc = "The maximum time to attempt to reconcile the Kustomization on the cluster."]
     #[serde(rename = "timeoutInSeconds", default, skip_serializing_if = "Option::is_none")]
@@ -1019,7 +1072,12 @@ pub struct ObjectStatusDefinition {
     #[serde(rename = "appliedBy", default, skip_serializing_if = "Option::is_none")]
     pub applied_by: Option<ObjectReferenceDefinition>,
     #[doc = "List of Kubernetes object status conditions present on the cluster"]
-    #[serde(rename = "statusConditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusConditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_conditions: Vec<ObjectStatusConditionDefinition>,
     #[serde(rename = "helmReleaseProperties", default, skip_serializing_if = "Option::is_none")]
     pub helm_release_properties: Option<HelmReleasePropertiesDefinition>,
@@ -1033,7 +1091,11 @@ impl ObjectStatusDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationStatusList {
     #[doc = "List of async operations in progress, in the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationStatusResult>,
     #[doc = "URL to get the next set of Operation Result objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1302,7 +1364,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
     #[doc = "URL to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1520,7 +1586,11 @@ pub mod source_control_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlConfigurationList {
     #[doc = "List of Source Control Configurations within a Kubernetes cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControlConfiguration>,
     #[doc = "URL to get the next set of configuration objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/kubernetesconfiguration/src/package_preview_2022_04/models.rs b/services/mgmt/kubernetesconfiguration/src/package_preview_2022_04/models.rs
index 5aa7cb340a..58577fdedf 100644
--- a/services/mgmt/kubernetesconfiguration/src/package_preview_2022_04/models.rs
+++ b/services/mgmt/kubernetesconfiguration/src/package_preview_2022_04/models.rs
@@ -207,10 +207,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -292,7 +301,11 @@ pub mod extension {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<ProvisioningStateDefinition>,
         #[doc = "Status from this extension."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub statuses: Vec<ExtensionStatus>,
         #[doc = "The error detail."]
         #[serde(rename = "errorInfo", default, skip_serializing_if = "Option::is_none")]
@@ -418,7 +431,11 @@ pub mod extension_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionsList {
     #[doc = "List of Extensions within a Kubernetes cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Extension>,
     #[doc = "URL to get the next set of extension objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -531,7 +548,11 @@ pub mod flux_configuration {
         #[serde(rename = "configurationProtectedSettings", default, skip_serializing_if = "Option::is_none")]
         pub configuration_protected_settings: Option<serde_json::Value>,
         #[doc = "Statuses of the Flux Kubernetes resources created by the fluxConfiguration or created by the managed objects provisioned by the fluxConfiguration."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub statuses: Vec<ObjectStatusDefinition>,
         #[doc = "Public Key associated with this fluxConfiguration (either generated within the cluster or provided by the user)."]
         #[serde(rename = "repositoryPublicKey", default, skip_serializing_if = "Option::is_none")]
@@ -607,7 +628,11 @@ pub mod flux_configuration_patch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FluxConfigurationsList {
     #[doc = "List of Flux Configurations within a Kubernetes cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FluxConfiguration>,
     #[doc = "URL to get the next set of configuration objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -808,7 +833,12 @@ pub struct KubernetesConfigurationPrivateLinkScopeProperties {
     #[serde(rename = "privateLinkScopeId", default, skip_serializing_if = "Option::is_none")]
     pub private_link_scope_id: Option<String>,
     #[doc = "The collection of associated Private Endpoint Connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl KubernetesConfigurationPrivateLinkScopeProperties {
@@ -832,7 +862,12 @@ pub struct KustomizationDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Specifies other Kustomizations that this Kustomization depends on. This Kustomization will not reconcile until all dependencies have completed their reconciliation."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<String>,
     #[doc = "The maximum time to attempt to reconcile the Kustomization on the cluster."]
     #[serde(rename = "timeoutInSeconds", default, skip_serializing_if = "Option::is_none")]
@@ -862,7 +897,12 @@ pub struct KustomizationPatchDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "Specifies other Kustomizations that this Kustomization depends on. This Kustomization will not reconcile until all dependencies have completed their reconciliation."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<String>,
     #[doc = "The maximum time to attempt to reconcile the Kustomization on the cluster."]
     #[serde(rename = "timeoutInSeconds", default, skip_serializing_if = "Option::is_none")]
@@ -990,7 +1030,12 @@ pub struct ObjectStatusDefinition {
     #[serde(rename = "appliedBy", default, skip_serializing_if = "Option::is_none")]
     pub applied_by: Option<ObjectReferenceDefinition>,
     #[doc = "List of Kubernetes object status conditions present on the cluster"]
-    #[serde(rename = "statusConditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusConditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_conditions: Vec<ObjectStatusConditionDefinition>,
     #[doc = "Properties for HelmRelease objects"]
     #[serde(rename = "helmReleaseProperties", default, skip_serializing_if = "Option::is_none")]
@@ -1005,7 +1050,11 @@ impl ObjectStatusDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationStatusList {
     #[doc = "List of async operations in progress, in the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationStatusResult>,
     #[doc = "URL to get the next set of Operation Result objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1187,7 +1236,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -1315,7 +1368,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -1330,10 +1387,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1545,7 +1612,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
     #[doc = "URL to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1763,7 +1834,11 @@ pub mod source_control_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceControlConfigurationList {
     #[doc = "List of Source Control Configurations within a Kubernetes cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SourceControlConfiguration>,
     #[doc = "URL to get the next set of configuration objects, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/kusto/src/schema_2017_09_07_privatepreview/models.rs b/services/mgmt/kusto/src/schema_2017_09_07_privatepreview/models.rs
index 1756447bd3..a2cebcd177 100644
--- a/services/mgmt/kusto/src/schema_2017_09_07_privatepreview/models.rs
+++ b/services/mgmt/kusto/src/schema_2017_09_07_privatepreview/models.rs
@@ -245,7 +245,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -302,7 +306,11 @@ pub mod cluster_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListResult {
     #[doc = "The list of Kusto clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
 }
 impl azure_core::Continuable for ClusterListResult {
@@ -332,7 +340,12 @@ pub struct ClusterProperties {
     #[serde(rename = "dataIngestionUri", default, skip_serializing_if = "Option::is_none")]
     pub data_ingestion_uri: Option<String>,
     #[doc = "The cluster's external tenants."]
-    #[serde(rename = "trustedExternalTenants", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedExternalTenants",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_external_tenants: Vec<TrustedExternalTenant>,
 }
 impl ClusterProperties {
@@ -507,7 +520,11 @@ pub mod database_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of Kusto databases."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
 }
 impl azure_core::Continuable for DatabaseListResult {
@@ -643,7 +660,11 @@ pub mod database_principal {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabasePrincipalListRequest {
     #[doc = "The list of Kusto database principals."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabasePrincipal>,
 }
 impl DatabasePrincipalListRequest {
@@ -655,7 +676,11 @@ impl DatabasePrincipalListRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabasePrincipalListResult {
     #[doc = "The list of Kusto database principals."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabasePrincipal>,
 }
 impl azure_core::Continuable for DatabasePrincipalListResult {
@@ -792,7 +817,11 @@ impl EventHubConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventHubConnectionListResult {
     #[doc = "The list of Kusto event hub connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventHubConnection>,
 }
 impl azure_core::Continuable for EventHubConnectionListResult {
@@ -917,7 +946,11 @@ impl EventHubConnectionValidation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventHubConnectionValidationListResult {
     #[doc = "The list of Kusto event hub connection validation errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventHubConnectionValidationResult>,
 }
 impl EventHubConnectionValidationListResult {
@@ -940,7 +973,11 @@ impl EventHubConnectionValidationResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListResourceSkusResult {
     #[doc = "The collection of available SKUs for an existing resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureResourceSku>,
 }
 impl azure_core::Continuable for ListResourceSkusResult {
@@ -958,7 +995,11 @@ impl ListResourceSkusResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListSkusResult {
     #[doc = "The collection of available SKUs for new resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureSku>,
 }
 impl azure_core::Continuable for ListSkusResult {
@@ -1011,7 +1052,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
diff --git a/services/mgmt/kusto/src/schema_2018_09_07_preview/models.rs b/services/mgmt/kusto/src/schema_2018_09_07_preview/models.rs
index 1756447bd3..a2cebcd177 100644
--- a/services/mgmt/kusto/src/schema_2018_09_07_preview/models.rs
+++ b/services/mgmt/kusto/src/schema_2018_09_07_preview/models.rs
@@ -245,7 +245,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -302,7 +306,11 @@ pub mod cluster_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListResult {
     #[doc = "The list of Kusto clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
 }
 impl azure_core::Continuable for ClusterListResult {
@@ -332,7 +340,12 @@ pub struct ClusterProperties {
     #[serde(rename = "dataIngestionUri", default, skip_serializing_if = "Option::is_none")]
     pub data_ingestion_uri: Option<String>,
     #[doc = "The cluster's external tenants."]
-    #[serde(rename = "trustedExternalTenants", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedExternalTenants",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_external_tenants: Vec<TrustedExternalTenant>,
 }
 impl ClusterProperties {
@@ -507,7 +520,11 @@ pub mod database_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of Kusto databases."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
 }
 impl azure_core::Continuable for DatabaseListResult {
@@ -643,7 +660,11 @@ pub mod database_principal {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabasePrincipalListRequest {
     #[doc = "The list of Kusto database principals."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabasePrincipal>,
 }
 impl DatabasePrincipalListRequest {
@@ -655,7 +676,11 @@ impl DatabasePrincipalListRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabasePrincipalListResult {
     #[doc = "The list of Kusto database principals."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabasePrincipal>,
 }
 impl azure_core::Continuable for DatabasePrincipalListResult {
@@ -792,7 +817,11 @@ impl EventHubConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventHubConnectionListResult {
     #[doc = "The list of Kusto event hub connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventHubConnection>,
 }
 impl azure_core::Continuable for EventHubConnectionListResult {
@@ -917,7 +946,11 @@ impl EventHubConnectionValidation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventHubConnectionValidationListResult {
     #[doc = "The list of Kusto event hub connection validation errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventHubConnectionValidationResult>,
 }
 impl EventHubConnectionValidationListResult {
@@ -940,7 +973,11 @@ impl EventHubConnectionValidationResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListResourceSkusResult {
     #[doc = "The collection of available SKUs for an existing resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureResourceSku>,
 }
 impl azure_core::Continuable for ListResourceSkusResult {
@@ -958,7 +995,11 @@ impl ListResourceSkusResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListSkusResult {
     #[doc = "The collection of available SKUs for new resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureSku>,
 }
 impl azure_core::Continuable for ListSkusResult {
@@ -1011,7 +1052,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
diff --git a/services/mgmt/kusto/src/schema_2019_01_21/models.rs b/services/mgmt/kusto/src/schema_2019_01_21/models.rs
index 44ccf84905..d84506e849 100644
--- a/services/mgmt/kusto/src/schema_2019_01_21/models.rs
+++ b/services/mgmt/kusto/src/schema_2019_01_21/models.rs
@@ -310,7 +310,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -365,7 +369,11 @@ pub mod cluster_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListResult {
     #[doc = "The list of Kusto clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
 }
 impl azure_core::Continuable for ClusterListResult {
@@ -395,7 +403,12 @@ pub struct ClusterProperties {
     #[serde(rename = "dataIngestionUri", default, skip_serializing_if = "Option::is_none")]
     pub data_ingestion_uri: Option<String>,
     #[doc = "The cluster's external tenants."]
-    #[serde(rename = "trustedExternalTenants", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedExternalTenants",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_external_tenants: Vec<TrustedExternalTenant>,
 }
 impl ClusterProperties {
@@ -610,7 +623,11 @@ pub mod data_connection_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataConnectionListResult {
     #[doc = "The list of Kusto data connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataConnection>,
 }
 impl azure_core::Continuable for DataConnectionListResult {
@@ -643,7 +660,11 @@ impl DataConnectionValidation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataConnectionValidationListResult {
     #[doc = "The list of Kusto data connection validation errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataConnectionValidationResult>,
 }
 impl DataConnectionValidationListResult {
@@ -773,7 +794,11 @@ pub mod database_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of Kusto databases."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
 }
 impl azure_core::Continuable for DatabaseListResult {
@@ -910,7 +935,11 @@ pub mod database_principal {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabasePrincipalListRequest {
     #[doc = "The list of Kusto database principals."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabasePrincipal>,
 }
 impl DatabasePrincipalListRequest {
@@ -922,7 +951,11 @@ impl DatabasePrincipalListRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabasePrincipalListResult {
     #[doc = "The list of Kusto database principals."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabasePrincipal>,
 }
 impl azure_core::Continuable for DatabasePrincipalListResult {
@@ -1140,7 +1173,11 @@ impl EventHubDataConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListResourceSkusResult {
     #[doc = "The collection of available SKUs for an existing resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureResourceSku>,
 }
 impl azure_core::Continuable for ListResourceSkusResult {
@@ -1158,7 +1195,11 @@ impl ListResourceSkusResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListSkusResult {
     #[doc = "The collection of available SKUs for new resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureSku>,
 }
 impl azure_core::Continuable for ListSkusResult {
@@ -1211,7 +1252,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
diff --git a/services/mgmt/kusto/src/schema_2019_05_15/models.rs b/services/mgmt/kusto/src/schema_2019_05_15/models.rs
index 27f1763333..31e0d55063 100644
--- a/services/mgmt/kusto/src/schema_2019_05_15/models.rs
+++ b/services/mgmt/kusto/src/schema_2019_05_15/models.rs
@@ -310,7 +310,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -369,7 +373,11 @@ pub mod cluster_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListResult {
     #[doc = "The list of Kusto clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
 }
 impl azure_core::Continuable for ClusterListResult {
@@ -399,7 +407,12 @@ pub struct ClusterProperties {
     #[serde(rename = "dataIngestionUri", default, skip_serializing_if = "Option::is_none")]
     pub data_ingestion_uri: Option<String>,
     #[doc = "The cluster's external tenants."]
-    #[serde(rename = "trustedExternalTenants", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedExternalTenants",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_external_tenants: Vec<TrustedExternalTenant>,
     #[doc = "A class that contains the optimized auto scale definition."]
     #[serde(rename = "optimizedAutoscale", default, skip_serializing_if = "Option::is_none")]
@@ -630,7 +643,11 @@ pub mod data_connection_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataConnectionListResult {
     #[doc = "The list of Kusto data connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataConnection>,
 }
 impl azure_core::Continuable for DataConnectionListResult {
@@ -663,7 +680,11 @@ impl DataConnectionValidation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataConnectionValidationListResult {
     #[doc = "The list of Kusto data connection validation errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataConnectionValidationResult>,
 }
 impl DataConnectionValidationListResult {
@@ -796,7 +817,11 @@ pub mod database_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of Kusto databases."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
 }
 impl azure_core::Continuable for DatabaseListResult {
@@ -937,7 +962,11 @@ pub mod database_principal {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabasePrincipalListRequest {
     #[doc = "The list of Kusto database principals."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabasePrincipal>,
 }
 impl DatabasePrincipalListRequest {
@@ -949,7 +978,11 @@ impl DatabasePrincipalListRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabasePrincipalListResult {
     #[doc = "The list of Kusto database principals."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabasePrincipal>,
 }
 impl azure_core::Continuable for DatabasePrincipalListResult {
@@ -1137,7 +1170,12 @@ pub struct EventHubConnectionProperties {
     #[serde(rename = "dataFormat", default, skip_serializing_if = "Option::is_none")]
     pub data_format: Option<DataFormat>,
     #[doc = "System properties of the event hub"]
-    #[serde(rename = "eventSystemProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eventSystemProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub event_system_properties: Vec<String>,
 }
 impl EventHubConnectionProperties {
@@ -1188,7 +1226,12 @@ pub struct IotHubConnectionProperties {
     #[serde(rename = "dataFormat", default, skip_serializing_if = "Option::is_none")]
     pub data_format: Option<DataFormat>,
     #[doc = "System properties of the iot hub"]
-    #[serde(rename = "eventSystemProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eventSystemProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub event_system_properties: Vec<String>,
     #[doc = "The name of the share access policy name"]
     #[serde(rename = "sharedAccessPolicyName")]
@@ -1228,7 +1271,11 @@ impl IotHubDataConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListResourceSkusResult {
     #[doc = "The collection of available SKUs for an existing resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureResourceSku>,
 }
 impl azure_core::Continuable for ListResourceSkusResult {
@@ -1281,7 +1328,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1362,13 +1413,26 @@ pub struct SkuDescription {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tier: Option<String>,
     #[doc = "The set of locations that the SKU is available"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Locations and zones"]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfoItem>,
     #[doc = "The restrictions because of which SKU cannot be used"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<serde_json::Value>,
 }
 impl SkuDescription {
@@ -1380,7 +1444,11 @@ impl SkuDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuDescriptionList {
     #[doc = "SKU descriptions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuDescription>,
 }
 impl azure_core::Continuable for SkuDescriptionList {
@@ -1400,7 +1468,11 @@ pub struct SkuLocationInfoItem {
     #[doc = "The available location of the SKU."]
     pub location: String,
     #[doc = "The available zone of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl SkuLocationInfoItem {
diff --git a/services/mgmt/kusto/src/schema_2019_09_07/models.rs b/services/mgmt/kusto/src/schema_2019_09_07/models.rs
index adc5b788b4..f5411d14eb 100644
--- a/services/mgmt/kusto/src/schema_2019_09_07/models.rs
+++ b/services/mgmt/kusto/src/schema_2019_09_07/models.rs
@@ -24,7 +24,11 @@ impl AttachedDatabaseConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AttachedDatabaseConfigurationListResult {
     #[doc = "The list of attached database configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AttachedDatabaseConfiguration>,
 }
 impl azure_core::Continuable for AttachedDatabaseConfigurationListResult {
@@ -51,7 +55,12 @@ pub struct AttachedDatabaseConfigurationProperties {
     #[serde(rename = "clusterResourceId")]
     pub cluster_resource_id: String,
     #[doc = "The list of databases from the clusterResourceId which are currently attached to the cluster."]
-    #[serde(rename = "attachedDatabaseNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "attachedDatabaseNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub attached_database_names: Vec<String>,
     #[doc = "The default principals modification kind"]
     #[serde(rename = "defaultPrincipalsModificationKind")]
@@ -491,7 +500,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -554,7 +567,11 @@ pub mod cluster_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListResult {
     #[doc = "The list of Kusto clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
 }
 impl azure_core::Continuable for ClusterListResult {
@@ -584,7 +601,12 @@ pub struct ClusterProperties {
     #[serde(rename = "dataIngestionUri", default, skip_serializing_if = "Option::is_none")]
     pub data_ingestion_uri: Option<String>,
     #[doc = "The cluster's external tenants."]
-    #[serde(rename = "trustedExternalTenants", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedExternalTenants",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_external_tenants: Vec<TrustedExternalTenant>,
     #[doc = "A class that contains the optimized auto scale definition."]
     #[serde(rename = "optimizedAutoscale", default, skip_serializing_if = "Option::is_none")]
@@ -821,7 +843,11 @@ pub mod data_connection_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataConnectionListResult {
     #[doc = "The list of Kusto data connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataConnection>,
 }
 impl azure_core::Continuable for DataConnectionListResult {
@@ -854,7 +880,11 @@ impl DataConnectionValidation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataConnectionValidationListResult {
     #[doc = "The list of Kusto data connection validation errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataConnectionValidationResult>,
 }
 impl DataConnectionValidationListResult {
@@ -1004,7 +1034,11 @@ pub mod database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of Kusto databases."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
 }
 impl azure_core::Continuable for DatabaseListResult {
@@ -1145,7 +1179,11 @@ pub mod database_principal {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabasePrincipalListRequest {
     #[doc = "The list of Kusto database principals."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabasePrincipal>,
 }
 impl DatabasePrincipalListRequest {
@@ -1157,7 +1195,11 @@ impl DatabasePrincipalListRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabasePrincipalListResult {
     #[doc = "The list of Kusto database principals."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabasePrincipal>,
 }
 impl azure_core::Continuable for DatabasePrincipalListResult {
@@ -1259,7 +1301,12 @@ pub struct EventHubConnectionProperties {
     #[serde(rename = "dataFormat", default, skip_serializing_if = "Option::is_none")]
     pub data_format: Option<DataFormat>,
     #[doc = "System properties of the event hub"]
-    #[serde(rename = "eventSystemProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eventSystemProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub event_system_properties: Vec<String>,
 }
 impl EventHubConnectionProperties {
@@ -1317,7 +1364,11 @@ impl FollowerDatabaseDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FollowerDatabaseListResult {
     #[doc = "The list of follower database result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FollowerDatabaseDefinition>,
 }
 impl azure_core::Continuable for FollowerDatabaseListResult {
@@ -1385,7 +1436,12 @@ pub struct IotHubConnectionProperties {
     #[serde(rename = "dataFormat", default, skip_serializing_if = "Option::is_none")]
     pub data_format: Option<DataFormat>,
     #[doc = "System properties of the iot hub"]
-    #[serde(rename = "eventSystemProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eventSystemProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub event_system_properties: Vec<String>,
     #[doc = "The name of the share access policy name"]
     #[serde(rename = "sharedAccessPolicyName")]
@@ -1447,7 +1503,11 @@ impl KeyVaultProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListResourceSkusResult {
     #[doc = "The collection of available SKUs for an existing resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureResourceSku>,
 }
 impl azure_core::Continuable for ListResourceSkusResult {
@@ -1500,7 +1560,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1795,13 +1859,26 @@ pub struct SkuDescription {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tier: Option<String>,
     #[doc = "The set of locations that the SKU is available"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Locations and zones"]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfoItem>,
     #[doc = "The restrictions because of which SKU cannot be used"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<serde_json::Value>,
 }
 impl SkuDescription {
@@ -1813,7 +1890,11 @@ impl SkuDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuDescriptionList {
     #[doc = "SKU descriptions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuDescription>,
 }
 impl azure_core::Continuable for SkuDescriptionList {
@@ -1833,7 +1914,11 @@ pub struct SkuLocationInfoItem {
     #[doc = "The available location of the SKU."]
     pub location: String,
     #[doc = "The available zone of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl SkuLocationInfoItem {
diff --git a/services/mgmt/labservices/src/package_2018_10/models.rs b/services/mgmt/labservices/src/package_2018_10/models.rs
index d9a48e1dce..812c966d17 100644
--- a/services/mgmt/labservices/src/package_2018_10/models.rs
+++ b/services/mgmt/labservices/src/package_2018_10/models.rs
@@ -43,7 +43,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Inner errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -468,7 +472,12 @@ pub struct EnvironmentSize {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<environment_size::Name>,
     #[doc = "Represents a set of compute sizes that can serve this given size type"]
-    #[serde(rename = "vmSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_sizes: Vec<SizeInfo>,
     #[doc = "The pay-as-you-go dollar price per hour this size will cost. It does not include discounts and may not reflect the actual price the size will cost. This is the maximum price of all prices within this tier."]
     #[serde(rename = "maxPrice", default, skip_serializing_if = "Option::is_none")]
@@ -534,7 +543,12 @@ pub struct EnvironmentSizeFragment {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<environment_size_fragment::Name>,
     #[doc = "Represents a set of compute sizes that can serve this given size type"]
-    #[serde(rename = "vmSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_sizes: Vec<SizeInfoFragment>,
 }
 impl EnvironmentSizeFragment {
@@ -748,7 +762,12 @@ pub struct GetPersonalPreferencesResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Array of favorite lab resource ids"]
-    #[serde(rename = "favoriteLabResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "favoriteLabResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub favorite_lab_resource_ids: Vec<String>,
 }
 impl GetPersonalPreferencesResponse {
@@ -760,7 +779,12 @@ impl GetPersonalPreferencesResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GetRegionalAvailabilityResponse {
     #[doc = "Availability information for different size categories per region"]
-    #[serde(rename = "regionalAvailability", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "regionalAvailability",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regional_availability: Vec<RegionalAvailability>,
 }
 impl GetRegionalAvailabilityResponse {
@@ -1096,7 +1120,11 @@ impl ListEnvironmentsPayload {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListEnvironmentsResponse {
     #[doc = "List of all the environments"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environments: Vec<EnvironmentDetails>,
 }
 impl ListEnvironmentsResponse {
@@ -1108,7 +1136,11 @@ impl ListEnvironmentsResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListLabsResponse {
     #[doc = "List of all the labs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labs: Vec<LabDetails>,
 }
 impl ListLabsResponse {
@@ -1160,7 +1192,11 @@ impl OperationBatchStatusPayload {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationBatchStatusResponse {
     #[doc = "Gets a collection of items that contain the operation url and status."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<OperationBatchStatusResponseItem>,
 }
 impl OperationBatchStatusResponse {
@@ -1335,7 +1371,11 @@ pub mod personal_preferences_operations_payload {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderOperationResult {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationMetadata>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1426,7 +1466,12 @@ pub struct RegionalAvailability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub region: Option<String>,
     #[doc = "List of all the size information for the region"]
-    #[serde(rename = "sizeAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sizeAvailabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub size_availabilities: Vec<SizeAvailability>,
 }
 impl RegionalAvailability {
@@ -1734,7 +1779,11 @@ pub mod resource_settings_fragment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationEnvironmentSetting {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnvironmentSetting>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1755,7 +1804,11 @@ impl ResponseWithContinuationEnvironmentSetting {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationEnvironment {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Environment>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1776,7 +1829,11 @@ impl ResponseWithContinuationEnvironment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationGalleryImage {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GalleryImage>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1797,7 +1854,11 @@ impl ResponseWithContinuationGalleryImage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationLabAccount {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LabAccount>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1818,7 +1879,11 @@ impl ResponseWithContinuationLabAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationLab {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Lab>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1839,7 +1904,11 @@ impl ResponseWithContinuationLab {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResponseWithContinuationUser {
     #[doc = "Results of the list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<User>,
     #[doc = "Link for next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1917,7 +1986,12 @@ pub mod size_availability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SizeConfigurationProperties {
     #[doc = "Represents a list of size categories supported by this Lab Account (Small, Medium, Large)"]
-    #[serde(rename = "environmentSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_sizes: Vec<EnvironmentSize>,
 }
 impl SizeConfigurationProperties {
@@ -1929,7 +2003,12 @@ impl SizeConfigurationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SizeConfigurationPropertiesFragment {
     #[doc = "Represents a list of size categories supported by this Lab Account (Small, Medium, Large)"]
-    #[serde(rename = "environmentSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_sizes: Vec<EnvironmentSizeFragment>,
 }
 impl SizeConfigurationPropertiesFragment {
diff --git a/services/mgmt/labservices/src/package_2022_08/models.rs b/services/mgmt/labservices/src/package_2022_08/models.rs
index dd5b14acf1..51433f9e96 100644
--- a/services/mgmt/labservices/src/package_2022_08/models.rs
+++ b/services/mgmt/labservices/src/package_2022_08/models.rs
@@ -93,10 +93,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -213,7 +222,12 @@ pub struct ImageProperties {
     #[serde(rename = "sharedGalleryId", default, skip_serializing_if = "Option::is_none")]
     pub shared_gallery_id: Option<Url>,
     #[doc = "The available regions of the image in the shared gallery."]
-    #[serde(rename = "availableRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_regions: Vec<String>,
     #[doc = "The operating system state."]
     #[serde(rename = "osState", default, skip_serializing_if = "Option::is_none")]
@@ -430,7 +444,12 @@ pub struct LabPlanUpdateProperties {
     #[serde(rename = "defaultNetworkProfile", default, skip_serializing_if = "Option::is_none")]
     pub default_network_profile: Option<LabPlanNetworkProfile>,
     #[doc = "The allowed regions for the lab creator to use when creating labs using this lab plan."]
-    #[serde(rename = "allowedRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_regions: Vec<String>,
     #[doc = "A URL."]
     #[serde(rename = "sharedGalleryId", default, skip_serializing_if = "Option::is_none")]
@@ -494,16 +513,32 @@ pub struct LabServicesSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<LabServicesSkuCapacity>,
     #[doc = "The capabilities of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<LabServicesSkuCapabilities>,
     #[doc = "List of locations that are available for a size."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Metadata for retrieving price info of a lab services SKUs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<LabServicesSkuCost>,
     #[doc = "Restrictions of a lab services SKUs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<LabServicesSkuRestrictions>,
 }
 impl LabServicesSku {
@@ -654,7 +689,11 @@ pub struct LabServicesSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<lab_services_sku_restrictions::Type>,
     #[doc = "The values of the restriction."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for the restriction."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -800,7 +839,11 @@ impl LabUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListUsagesResult {
     #[doc = "The array page of Usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "The link to get the next page of Usage result."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -946,7 +989,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1016,7 +1063,11 @@ pub mod operation_result {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedImages {
     #[doc = "The array page of virtual machine images."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Image>,
     #[doc = "The link to get the next page of image results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1037,7 +1088,11 @@ impl PagedImages {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedLabPlans {
     #[doc = "The array page of lab plans."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LabPlan>,
     #[doc = "The link to get the next page of lab plan results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1058,7 +1113,11 @@ impl PagedLabPlans {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedLabServicesSkus {
     #[doc = "The array page of sku results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LabServicesSku>,
     #[doc = "The link to get the next page of sku results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1079,7 +1138,11 @@ impl PagedLabServicesSkus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedLabs {
     #[doc = "The array page of lab results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Lab>,
     #[doc = "The link to get the next page of image results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1100,7 +1163,11 @@ impl PagedLabs {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedSchedules {
     #[doc = "The array page of schedule results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Schedule>,
     #[doc = "The link to get the next page of schedule results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1121,7 +1188,11 @@ impl PagedSchedules {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedUsers {
     #[doc = "The array page of user results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<User>,
     #[doc = "The link to get the next page of image results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1142,7 +1213,11 @@ impl PagedUsers {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedVirtualMachines {
     #[doc = "The array page of virtual machine results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachine>,
     #[doc = "The link to get the next page of virtual machine results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1182,7 +1257,12 @@ pub struct RecurrencePattern {
     #[doc = "Schedule recurrence frequencies."]
     pub frequency: RecurrenceFrequency,
     #[doc = "The week days the schedule runs. Used for when the Frequency is set to Weekly."]
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<WeekDay>,
     #[doc = "The interval to invoke the schedule on. For example, interval = 2 and RecurrenceFrequency.Daily will run every 2 days. When no interval is supplied, an interval of 1 is used."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1450,7 +1530,11 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrackedResourceUpdate {
     #[doc = "Resource tags."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
 }
 impl TrackedResourceUpdate {
@@ -1527,7 +1611,12 @@ pub struct UsageName {
     #[serde(rename = "localizedValue", default, skip_serializing_if = "Option::is_none")]
     pub localized_value: Option<String>,
     #[doc = "The instances of the resource."]
-    #[serde(rename = "skuInstances", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuInstances",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_instances: Vec<String>,
     #[doc = "The name of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/labservices/src/package_preview_2021_10/models.rs b/services/mgmt/labservices/src/package_preview_2021_10/models.rs
index 8a5d9fb80c..68e88af17a 100644
--- a/services/mgmt/labservices/src/package_preview_2021_10/models.rs
+++ b/services/mgmt/labservices/src/package_preview_2021_10/models.rs
@@ -93,10 +93,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -187,7 +196,12 @@ pub struct ImageProperties {
     #[serde(rename = "sharedGalleryId", default, skip_serializing_if = "Option::is_none")]
     pub shared_gallery_id: Option<Url>,
     #[doc = "The available regions of the image in the shared gallery."]
-    #[serde(rename = "availableRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_regions: Vec<String>,
     #[doc = "The operating system state."]
     #[serde(rename = "osState", default, skip_serializing_if = "Option::is_none")]
@@ -397,7 +411,12 @@ pub struct LabPlanUpdateProperties {
     #[serde(rename = "defaultNetworkProfile", default, skip_serializing_if = "Option::is_none")]
     pub default_network_profile: Option<LabPlanNetworkProfile>,
     #[doc = "The allowed regions for the lab creator to use when creating labs using this lab plan."]
-    #[serde(rename = "allowedRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_regions: Vec<String>,
     #[doc = "A URL."]
     #[serde(rename = "sharedGalleryId", default, skip_serializing_if = "Option::is_none")]
@@ -624,7 +643,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -694,7 +717,11 @@ pub mod operation_result {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedImages {
     #[doc = "The array page of virtual machine images."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Image>,
     #[doc = "The link to get the next page of image results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -715,7 +742,11 @@ impl PagedImages {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedLabPlans {
     #[doc = "The array page of lab plans."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LabPlan>,
     #[doc = "The link to get the next page of lab plan results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -736,7 +767,11 @@ impl PagedLabPlans {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedLabs {
     #[doc = "The array page of lab results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Lab>,
     #[doc = "The link to get the next page of image results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -757,7 +792,11 @@ impl PagedLabs {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedSchedules {
     #[doc = "The array page of schedule results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Schedule>,
     #[doc = "The link to get the next page of schedule results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -778,7 +817,11 @@ impl PagedSchedules {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedUsers {
     #[doc = "The array page of user results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<User>,
     #[doc = "The link to get the next page of image results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -799,7 +842,11 @@ impl PagedUsers {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedVirtualMachines {
     #[doc = "The array page of virtual machine results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachine>,
     #[doc = "The link to get the next page of virtual machine results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -839,7 +886,12 @@ pub struct RecurrencePattern {
     #[doc = "Schedule recurrence frequencies."]
     pub frequency: RecurrenceFrequency,
     #[doc = "The week days the schedule runs. Used for when the Frequency is set to Weekly."]
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<WeekDay>,
     #[doc = "The interval to invoke the schedule on. For example, interval = 2 and RecurrenceFrequency.Daily will run every 2 days. When no interval is supplied, an interval of 1 is used."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1107,7 +1159,11 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrackedResourceUpdate {
     #[doc = "Resource tags."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
 }
 impl TrackedResourceUpdate {
diff --git a/services/mgmt/labservices/src/package_preview_2021_11/models.rs b/services/mgmt/labservices/src/package_preview_2021_11/models.rs
index b2fe31a11b..7ee1cad5fc 100644
--- a/services/mgmt/labservices/src/package_preview_2021_11/models.rs
+++ b/services/mgmt/labservices/src/package_preview_2021_11/models.rs
@@ -93,10 +93,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -187,7 +196,12 @@ pub struct ImageProperties {
     #[serde(rename = "sharedGalleryId", default, skip_serializing_if = "Option::is_none")]
     pub shared_gallery_id: Option<Url>,
     #[doc = "The available regions of the image in the shared gallery."]
-    #[serde(rename = "availableRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_regions: Vec<String>,
     #[doc = "The operating system state."]
     #[serde(rename = "osState", default, skip_serializing_if = "Option::is_none")]
@@ -397,7 +411,12 @@ pub struct LabPlanUpdateProperties {
     #[serde(rename = "defaultNetworkProfile", default, skip_serializing_if = "Option::is_none")]
     pub default_network_profile: Option<LabPlanNetworkProfile>,
     #[doc = "The allowed regions for the lab creator to use when creating labs using this lab plan."]
-    #[serde(rename = "allowedRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_regions: Vec<String>,
     #[doc = "A URL."]
     #[serde(rename = "sharedGalleryId", default, skip_serializing_if = "Option::is_none")]
@@ -461,16 +480,32 @@ pub struct LabServicesSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<LabServicesSkuCapacity>,
     #[doc = "The capabilities of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<LabServicesSkuCapabilities>,
     #[doc = "List of locations that are available for a size."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Metadata for retrieving price info of a lab services SKUs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<LabServicesSkuCost>,
     #[doc = "Restrictions of a lab services SKUs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<LabServicesSkuRestrictions>,
 }
 impl LabServicesSku {
@@ -621,7 +656,11 @@ pub struct LabServicesSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<lab_services_sku_restrictions::Type>,
     #[doc = "The values of the restriction."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for the restriction."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -767,7 +806,11 @@ impl LabUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListUsagesResult {
     #[doc = "The array page of Usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "The link to get the next page of Usage result."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -913,7 +956,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -983,7 +1030,11 @@ pub mod operation_result {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedImages {
     #[doc = "The array page of virtual machine images."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Image>,
     #[doc = "The link to get the next page of image results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1004,7 +1055,11 @@ impl PagedImages {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedLabPlans {
     #[doc = "The array page of lab plans."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LabPlan>,
     #[doc = "The link to get the next page of lab plan results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1025,7 +1080,11 @@ impl PagedLabPlans {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedLabServicesSkus {
     #[doc = "The array page of sku results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LabServicesSku>,
     #[doc = "The link to get the next page of sku results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1046,7 +1105,11 @@ impl PagedLabServicesSkus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedLabs {
     #[doc = "The array page of lab results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Lab>,
     #[doc = "The link to get the next page of image results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1067,7 +1130,11 @@ impl PagedLabs {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedSchedules {
     #[doc = "The array page of schedule results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Schedule>,
     #[doc = "The link to get the next page of schedule results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1088,7 +1155,11 @@ impl PagedSchedules {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedUsers {
     #[doc = "The array page of user results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<User>,
     #[doc = "The link to get the next page of image results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1109,7 +1180,11 @@ impl PagedUsers {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedVirtualMachines {
     #[doc = "The array page of virtual machine results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachine>,
     #[doc = "The link to get the next page of virtual machine results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1149,7 +1224,12 @@ pub struct RecurrencePattern {
     #[doc = "Schedule recurrence frequencies."]
     pub frequency: RecurrenceFrequency,
     #[doc = "The week days the schedule runs. Used for when the Frequency is set to Weekly."]
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<WeekDay>,
     #[doc = "The interval to invoke the schedule on. For example, interval = 2 and RecurrenceFrequency.Daily will run every 2 days. When no interval is supplied, an interval of 1 is used."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1417,7 +1497,11 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrackedResourceUpdate {
     #[doc = "Resource tags."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
 }
 impl TrackedResourceUpdate {
diff --git a/services/mgmt/loadtestservice/src/package_2021_12_01_preview/models.rs b/services/mgmt/loadtestservice/src/package_2021_12_01_preview/models.rs
index 6ab683b765..5d9d655ddc 100644
--- a/services/mgmt/loadtestservice/src/package_2021_12_01_preview/models.rs
+++ b/services/mgmt/loadtestservice/src/package_2021_12_01_preview/models.rs
@@ -31,10 +31,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -103,7 +112,11 @@ impl LoadTestResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadTestResourcePageList {
     #[doc = "List of resources in current page."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoadTestResource>,
     #[doc = "Link to next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -282,7 +295,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/loadtestservice/src/package_2022_04_15_preview/models.rs b/services/mgmt/loadtestservice/src/package_2022_04_15_preview/models.rs
index 2da4843eea..bd8062e255 100644
--- a/services/mgmt/loadtestservice/src/package_2022_04_15_preview/models.rs
+++ b/services/mgmt/loadtestservice/src/package_2022_04_15_preview/models.rs
@@ -104,10 +104,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -179,7 +188,11 @@ impl LoadTestResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadTestResourcePageList {
     #[doc = "List of resources in current page."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoadTestResource>,
     #[doc = "Link to next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -431,7 +444,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/logic/src/package_2018_07_preview/models.rs b/services/mgmt/logic/src/package_2018_07_preview/models.rs
index d741bb80ca..ae95d8bff1 100644
--- a/services/mgmt/logic/src/package_2018_07_preview/models.rs
+++ b/services/mgmt/logic/src/package_2018_07_preview/models.rs
@@ -442,7 +442,11 @@ impl ArtifactProperties {
 #[doc = "A collection of assembly definitions."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssemblyCollection {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AssemblyDefinition>,
 }
 impl azure_core::Continuable for AssemblyCollection {
@@ -509,7 +513,11 @@ pub struct AzureResourceErrorInfo {
     #[doc = "The error message."]
     pub message: String,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<AzureResourceErrorInfo>,
 }
 impl AzureResourceErrorInfo {
@@ -525,7 +533,12 @@ impl AzureResourceErrorInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct B2bPartnerContent {
     #[doc = "The list of partner business identities."]
-    #[serde(rename = "businessIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "businessIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub business_identities: Vec<BusinessIdentity>,
 }
 impl B2bPartnerContent {
@@ -552,7 +565,11 @@ impl BatchConfiguration {
 #[doc = "A collection of batch configurations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BatchConfigurationCollection {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BatchConfiguration>,
 }
 impl azure_core::Continuable for BatchConfigurationCollection {
@@ -1337,19 +1354,39 @@ pub struct EdifactProtocolSettings {
     #[serde(rename = "processingSettings")]
     pub processing_settings: EdifactProcessingSettings,
     #[doc = "The EDIFACT envelope override settings."]
-    #[serde(rename = "envelopeOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "envelopeOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub envelope_overrides: Vec<EdifactEnvelopeOverride>,
     #[doc = "The EDIFACT message filter list."]
-    #[serde(rename = "messageFilterList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "messageFilterList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub message_filter_list: Vec<EdifactMessageIdentifier>,
     #[doc = "The EDIFACT schema references."]
     #[serde(rename = "schemaReferences")]
     pub schema_references: Vec<EdifactSchemaReference>,
     #[doc = "The EDIFACT validation override settings."]
-    #[serde(rename = "validationOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_overrides: Vec<EdifactValidationOverride>,
     #[doc = "The EDIFACT delimiter override settings."]
-    #[serde(rename = "edifactDelimiterOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "edifactDelimiterOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub edifact_delimiter_overrides: Vec<EdifactDelimiterOverride>,
 }
 impl EdifactProtocolSettings {
@@ -1631,7 +1668,11 @@ pub struct Expression {
     pub text: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subexpressions: Vec<Expression>,
     #[doc = "The azure resource error info."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1657,7 +1698,11 @@ impl ExpressionRoot {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressionTraces {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<ExpressionRoot>,
 }
 impl azure_core::Continuable for ExpressionTraces {
@@ -1795,7 +1840,11 @@ impl IntegrationAccountAgreementFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationAccountAgreementListResult {
     #[doc = "The list of integration account agreements."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationAccountAgreement>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1883,7 +1932,11 @@ impl IntegrationAccountCertificate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationAccountCertificateListResult {
     #[doc = "The list of integration account certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationAccountCertificate>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1928,7 +1981,11 @@ impl IntegrationAccountCertificateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationAccountListResult {
     #[doc = "The list of integration accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationAccount>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1976,7 +2033,11 @@ impl IntegrationAccountMapFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationAccountMapListResult {
     #[doc = "The list of integration account maps."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationAccountMap>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2080,7 +2141,11 @@ impl IntegrationAccountPartnerFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationAccountPartnerListResult {
     #[doc = "The list of integration account partners."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationAccountPartner>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2163,7 +2228,11 @@ impl IntegrationAccountSchemaFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationAccountSchemaListResult {
     #[doc = "The list of integration account schemas."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationAccountSchema>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2261,7 +2330,11 @@ impl IntegrationAccountSessionFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationAccountSessionListResult {
     #[doc = "The list of integration account sessions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationAccountSession>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2438,7 +2511,11 @@ pub mod key_vault_key {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyVaultKeyCollection {
     #[doc = "The key vault keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KeyVaultKey>,
     #[doc = "The skip token."]
     #[serde(rename = "skipToken", default, skip_serializing_if = "Option::is_none")]
@@ -2657,7 +2734,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Logic operations supported by the Logic resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2695,7 +2776,12 @@ pub struct OperationResult {
     #[serde(rename = "trackedProperties", default, skip_serializing_if = "Option::is_none")]
     pub tracked_properties: Option<Object>,
     #[doc = "Gets the retry histories."]
-    #[serde(rename = "retryHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retryHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retry_history: Vec<RetryHistory>,
     #[serde(rename = "iterationCount", default, skip_serializing_if = "Option::is_none")]
     pub iteration_count: Option<i32>,
@@ -2881,19 +2967,42 @@ impl Serialize for RecurrenceFrequency {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecurrenceSchedule {
     #[doc = "The minutes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minutes: Vec<i32>,
     #[doc = "The hours."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hours: Vec<i32>,
     #[doc = "The days of the week."]
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<String>,
     #[doc = "The month days."]
-    #[serde(rename = "monthDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub month_days: Vec<i32>,
     #[doc = "The monthly occurrences."]
-    #[serde(rename = "monthlyOccurrences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthlyOccurrences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monthly_occurrences: Vec<RecurrenceScheduleOccurrence>,
 }
 impl RecurrenceSchedule {
@@ -2979,7 +3088,11 @@ impl RequestHistory {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RequestHistoryListResult {
     #[doc = "A list of workflow request histories."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RequestHistory>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3124,7 +3237,12 @@ pub struct RunCorrelation {
     #[serde(rename = "clientTrackingId", default, skip_serializing_if = "Option::is_none")]
     pub client_tracking_id: Option<String>,
     #[doc = "The client keywords."]
-    #[serde(rename = "clientKeywords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientKeywords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_keywords: Vec<String>,
 }
 impl RunCorrelation {
@@ -3588,7 +3706,11 @@ impl WorkflowFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowListResult {
     #[doc = "The list of workflows."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workflow>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3795,7 +3917,11 @@ impl WorkflowRunActionFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowRunActionListResult {
     #[doc = "A list of workflow run actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowRunAction>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3843,7 +3969,12 @@ pub struct WorkflowRunActionProperties {
     #[serde(rename = "trackedProperties", default, skip_serializing_if = "Option::is_none")]
     pub tracked_properties: Option<Object>,
     #[doc = "Gets the retry histories."]
-    #[serde(rename = "retryHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retryHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retry_history: Vec<RetryHistory>,
 }
 impl WorkflowRunActionProperties {
@@ -3870,7 +4001,11 @@ impl WorkflowRunActionRepetitionDefinition {
 #[doc = "A collection of workflow run action repetitions."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowRunActionRepetitionDefinitionCollection {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowRunActionRepetitionDefinition>,
 }
 impl azure_core::Continuable for WorkflowRunActionRepetitionDefinitionCollection {
@@ -3890,7 +4025,12 @@ pub struct WorkflowRunActionRepetitionProperties {
     #[serde(flatten)]
     pub operation_result: OperationResult,
     #[doc = "The repetition indexes."]
-    #[serde(rename = "repetitionIndexes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "repetitionIndexes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub repetition_indexes: Vec<RepetitionIndex>,
 }
 impl WorkflowRunActionRepetitionProperties {
@@ -3913,7 +4053,11 @@ impl WorkflowRunFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowRunListResult {
     #[doc = "A list of workflow runs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowRun>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4157,7 +4301,12 @@ pub struct WorkflowTriggerCallbackUrl {
     #[serde(rename = "relativePath", default, skip_serializing_if = "Option::is_none")]
     pub relative_path: Option<String>,
     #[doc = "Gets the workflow trigger callback URL relative path parameters."]
-    #[serde(rename = "relativePathParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "relativePathParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub relative_path_parameters: Vec<String>,
     #[doc = "Gets the workflow trigger callback URL query parameters."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4214,7 +4363,11 @@ impl WorkflowTriggerHistoryFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowTriggerHistoryListResult {
     #[doc = "A list of workflow trigger histories."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowTriggerHistory>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4299,7 +4452,11 @@ impl WorkflowTriggerListCallbackUrlQueries {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowTriggerListResult {
     #[doc = "A list of workflow triggers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowTrigger>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4461,7 +4618,11 @@ impl WorkflowVersion {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowVersionListResult {
     #[doc = "A list of workflow versions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowVersion>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5087,19 +5248,39 @@ pub struct X12ProtocolSettings {
     #[serde(rename = "processingSettings")]
     pub processing_settings: X12ProcessingSettings,
     #[doc = "The X12 envelope override settings."]
-    #[serde(rename = "envelopeOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "envelopeOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub envelope_overrides: Vec<X12EnvelopeOverride>,
     #[doc = "The X12 validation override settings."]
-    #[serde(rename = "validationOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_overrides: Vec<X12ValidationOverride>,
     #[doc = "The X12 message filter list."]
-    #[serde(rename = "messageFilterList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "messageFilterList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub message_filter_list: Vec<X12MessageIdentifier>,
     #[doc = "The X12 schema references."]
     #[serde(rename = "schemaReferences")]
     pub schema_references: Vec<X12SchemaReference>,
     #[doc = "The X12 delimiter override settings."]
-    #[serde(rename = "x12DelimiterOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "x12DelimiterOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub x12_delimiter_overrides: Vec<X12DelimiterOverrides>,
 }
 impl X12ProtocolSettings {
diff --git a/services/mgmt/logic/src/package_2019_05/models.rs b/services/mgmt/logic/src/package_2019_05/models.rs
index 6cd83c1333..8409826ece 100644
--- a/services/mgmt/logic/src/package_2019_05/models.rs
+++ b/services/mgmt/logic/src/package_2019_05/models.rs
@@ -521,7 +521,11 @@ impl ApiOperationAnnotation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApiOperationListResult {
     #[doc = "The api operation definitions for an API."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiOperation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -734,13 +738,22 @@ pub struct ApiResourceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<ApiResourceMetadata>,
     #[doc = "The runtime urls."]
-    #[serde(rename = "runtimeUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "runtimeUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub runtime_urls: Vec<String>,
     #[doc = "The API general information."]
     #[serde(rename = "generalInformation", default, skip_serializing_if = "Option::is_none")]
     pub general_information: Option<ApiResourceGeneralInformation>,
     #[doc = "The capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<String>,
     #[doc = "The API backend service."]
     #[serde(rename = "backendService", default, skip_serializing_if = "Option::is_none")]
@@ -887,7 +900,11 @@ impl ArtifactProperties {
 #[doc = "A collection of assembly definitions."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssemblyCollection {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AssemblyDefinition>,
 }
 impl azure_core::Continuable for AssemblyCollection {
@@ -995,7 +1012,11 @@ pub struct AzureResourceErrorInfo {
     #[doc = "The error message."]
     pub message: String,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<AzureResourceErrorInfo>,
 }
 impl AzureResourceErrorInfo {
@@ -1011,7 +1032,12 @@ impl AzureResourceErrorInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct B2bPartnerContent {
     #[doc = "The list of partner business identities."]
-    #[serde(rename = "businessIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "businessIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub business_identities: Vec<BusinessIdentity>,
 }
 impl B2bPartnerContent {
@@ -1038,7 +1064,11 @@ impl BatchConfiguration {
 #[doc = "A collection of batch configurations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BatchConfigurationCollection {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BatchConfiguration>,
 }
 impl azure_core::Continuable for BatchConfigurationCollection {
@@ -1832,19 +1862,39 @@ pub struct EdifactProtocolSettings {
     #[serde(rename = "processingSettings")]
     pub processing_settings: EdifactProcessingSettings,
     #[doc = "The EDIFACT envelope override settings."]
-    #[serde(rename = "envelopeOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "envelopeOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub envelope_overrides: Vec<EdifactEnvelopeOverride>,
     #[doc = "The EDIFACT message filter list."]
-    #[serde(rename = "messageFilterList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "messageFilterList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub message_filter_list: Vec<EdifactMessageIdentifier>,
     #[doc = "The EDIFACT schema references."]
     #[serde(rename = "schemaReferences")]
     pub schema_references: Vec<EdifactSchemaReference>,
     #[doc = "The EDIFACT validation override settings."]
-    #[serde(rename = "validationOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_overrides: Vec<EdifactValidationOverride>,
     #[doc = "The EDIFACT delimiter override settings."]
-    #[serde(rename = "edifactDelimiterOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "edifactDelimiterOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub edifact_delimiter_overrides: Vec<EdifactDelimiterOverride>,
 }
 impl EdifactProtocolSettings {
@@ -2175,7 +2225,11 @@ pub struct Expression {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<serde_json::Value>,
     #[doc = "The sub expressions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subexpressions: Vec<Expression>,
     #[doc = "The azure resource error info."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2203,7 +2257,11 @@ impl ExpressionRoot {
 #[doc = "The expression traces."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressionTraces {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<ExpressionRoot>,
 }
 impl azure_core::Continuable for ExpressionTraces {
@@ -2225,7 +2283,11 @@ pub struct ExtendedErrorInfo {
     #[doc = "The error message."]
     pub message: String,
     #[doc = "The error message details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ExtendedErrorInfo>,
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
     pub inner_error: Option<Object>,
@@ -2265,7 +2327,12 @@ impl FlowAccessControlConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FlowAccessControlConfigurationPolicy {
     #[doc = "The allowed caller IP address ranges."]
-    #[serde(rename = "allowedCallerIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedCallerIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_caller_ip_addresses: Vec<IpAddressRange>,
     #[doc = "AuthenticationPolicy of type Open."]
     #[serde(rename = "openAuthenticationPolicies", default, skip_serializing_if = "Option::is_none")]
@@ -2280,10 +2347,20 @@ impl FlowAccessControlConfigurationPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FlowEndpoints {
     #[doc = "The outgoing ip address."]
-    #[serde(rename = "outgoingIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outgoingIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outgoing_ip_addresses: Vec<IpAddress>,
     #[doc = "The access endpoint ip address."]
-    #[serde(rename = "accessEndpointIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessEndpointIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_endpoint_ip_addresses: Vec<IpAddress>,
 }
 impl FlowEndpoints {
@@ -2434,7 +2511,11 @@ impl IntegrationAccountAgreementFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationAccountAgreementListResult {
     #[doc = "The list of integration account agreements."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationAccountAgreement>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2523,7 +2604,11 @@ impl IntegrationAccountCertificate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationAccountCertificateListResult {
     #[doc = "The list of integration account certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationAccountCertificate>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2568,7 +2653,11 @@ impl IntegrationAccountCertificateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationAccountListResult {
     #[doc = "The list of integration accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationAccount>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2617,7 +2706,11 @@ impl IntegrationAccountMapFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationAccountMapListResult {
     #[doc = "The list of integration account maps."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationAccountMap>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2723,7 +2816,11 @@ impl IntegrationAccountPartnerFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationAccountPartnerListResult {
     #[doc = "The list of integration account partners."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationAccountPartner>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2816,7 +2913,11 @@ impl IntegrationAccountSchemaFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationAccountSchemaListResult {
     #[doc = "The list of integration account schemas."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationAccountSchema>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2915,7 +3016,11 @@ impl IntegrationAccountSessionFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationAccountSessionListResult {
     #[doc = "The list of integration account sessions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationAccountSession>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3107,7 +3212,11 @@ impl Serialize for IntegrationServiceEnvironmentAccessEndpointType {
 #[doc = "The list of integration service environments."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationServiceEnvironmentListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationServiceEnvironment>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3154,7 +3263,11 @@ impl IntegrationServiceEnvironmentManagedApiDeploymentParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationServiceEnvironmentManagedApiListResult {
     #[doc = "The integration service environment managed APIs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationServiceEnvironmentManagedApi>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3195,7 +3308,11 @@ pub struct IntegrationServiceEnvironmentNetworkDependency {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<IntegrationServiceEnvironmentNetworkEndpoint>,
 }
 impl IntegrationServiceEnvironmentNetworkDependency {
@@ -3427,7 +3544,11 @@ pub struct IntegrationServiceEnvironmentNetworkEndpoint {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The ports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<String>,
 }
 impl IntegrationServiceEnvironmentNetworkEndpoint {
@@ -3546,7 +3667,11 @@ pub mod integration_service_environment_sku_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationServiceEnvironmentSkuList {
     #[doc = "The list of integration service environment skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationServiceEnvironmentSkuDefinition>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3645,7 +3770,12 @@ impl Serialize for IntegrationServiceEnvironmentSkuScaleType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct IntegrationServiceEnvironmentSubnetNetworkHealth {
     #[doc = "The outbound network dependencies."]
-    #[serde(rename = "outboundNetworkDependencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outboundNetworkDependencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outbound_network_dependencies: Vec<IntegrationServiceEnvironmentNetworkDependency>,
     #[doc = "The integration service environment subnet network health."]
     #[serde(rename = "outboundNetworkHealth", default, skip_serializing_if = "Option::is_none")]
@@ -3781,7 +3911,11 @@ pub mod key_vault_key {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyVaultKeyCollection {
     #[doc = "The key vault keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KeyVaultKey>,
     #[doc = "The skip token."]
     #[serde(rename = "skipToken", default, skip_serializing_if = "Option::is_none")]
@@ -3891,7 +4025,11 @@ impl ManagedApi {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedApiListResult {
     #[doc = "The managed APIs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedApi>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4062,7 +4200,11 @@ pub struct NetworkConfiguration {
     #[serde(rename = "accessEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub access_endpoint: Option<IntegrationServiceEnvironmentAccessEndpoint>,
     #[doc = "The subnets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<ResourceReference>,
 }
 impl NetworkConfiguration {
@@ -4096,7 +4238,11 @@ pub struct OpenAuthenticationAccessPolicy {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<OpenAuthenticationProviderType>,
     #[doc = "The access policy claims."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub claims: Vec<OpenAuthenticationPolicyClaim>,
 }
 impl OpenAuthenticationAccessPolicy {
@@ -4203,7 +4349,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Logic operations supported by the Logic resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4241,7 +4391,12 @@ pub struct OperationResult {
     #[serde(rename = "trackedProperties", default, skip_serializing_if = "Option::is_none")]
     pub tracked_properties: Option<Object>,
     #[doc = "Gets the retry histories."]
-    #[serde(rename = "retryHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retryHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retry_history: Vec<RetryHistory>,
     #[serde(rename = "iterationCount", default, skip_serializing_if = "Option::is_none")]
     pub iteration_count: Option<i32>,
@@ -4431,19 +4586,42 @@ impl Serialize for RecurrenceFrequency {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecurrenceSchedule {
     #[doc = "The minutes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minutes: Vec<i32>,
     #[doc = "The hours."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hours: Vec<i32>,
     #[doc = "The days of the week."]
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<String>,
     #[doc = "The month days."]
-    #[serde(rename = "monthDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub month_days: Vec<i32>,
     #[doc = "The monthly occurrences."]
-    #[serde(rename = "monthlyOccurrences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthlyOccurrences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monthly_occurrences: Vec<RecurrenceScheduleOccurrence>,
 }
 impl RecurrenceSchedule {
@@ -4531,7 +4709,11 @@ impl RequestHistory {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RequestHistoryListResult {
     #[doc = "A list of workflow request histories."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RequestHistory>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4676,7 +4858,12 @@ pub struct RunCorrelation {
     #[serde(rename = "clientTrackingId", default, skip_serializing_if = "Option::is_none")]
     pub client_tracking_id: Option<String>,
     #[doc = "The client keywords."]
-    #[serde(rename = "clientKeywords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientKeywords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_keywords: Vec<String>,
 }
 impl RunCorrelation {
@@ -5090,7 +5277,11 @@ pub struct SwaggerSchema {
     #[serde(rename = "additionalProperties", default, skip_serializing_if = "Option::is_none")]
     pub additional_properties: Option<Object>,
     #[doc = "The object required properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required: Vec<String>,
     #[doc = "The maximum number of allowed properties."]
     #[serde(rename = "maxProperties", default, skip_serializing_if = "Option::is_none")]
@@ -5099,7 +5290,12 @@ pub struct SwaggerSchema {
     #[serde(rename = "minProperties", default, skip_serializing_if = "Option::is_none")]
     pub min_properties: Option<i64>,
     #[doc = "The schemas which must pass validation when this schema is used."]
-    #[serde(rename = "allOf", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allOf",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub all_of: Vec<SwaggerSchema>,
     #[doc = "The discriminator."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5510,7 +5706,11 @@ impl WorkflowFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowListResult {
     #[doc = "The list of workflows."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workflow>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5753,7 +5953,11 @@ impl WorkflowRunActionFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowRunActionListResult {
     #[doc = "A list of workflow run actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowRunAction>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5802,7 +6006,12 @@ pub struct WorkflowRunActionProperties {
     #[serde(rename = "trackedProperties", default, skip_serializing_if = "Option::is_none")]
     pub tracked_properties: Option<Object>,
     #[doc = "Gets the retry histories."]
-    #[serde(rename = "retryHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retryHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retry_history: Vec<RetryHistory>,
 }
 impl WorkflowRunActionProperties {
@@ -5832,7 +6041,11 @@ pub struct WorkflowRunActionRepetitionDefinitionCollection {
     #[doc = "The link used to get the next page of recommendations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowRunActionRepetitionDefinition>,
 }
 impl azure_core::Continuable for WorkflowRunActionRepetitionDefinitionCollection {
@@ -5852,7 +6065,12 @@ pub struct WorkflowRunActionRepetitionProperties {
     #[serde(flatten)]
     pub operation_result: OperationResult,
     #[doc = "The repetition indexes."]
-    #[serde(rename = "repetitionIndexes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "repetitionIndexes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub repetition_indexes: Vec<RepetitionIndex>,
 }
 impl WorkflowRunActionRepetitionProperties {
@@ -5876,7 +6094,11 @@ impl WorkflowRunFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowRunListResult {
     #[doc = "A list of workflow runs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowRun>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6124,7 +6346,12 @@ pub struct WorkflowTriggerCallbackUrl {
     #[serde(rename = "relativePath", default, skip_serializing_if = "Option::is_none")]
     pub relative_path: Option<String>,
     #[doc = "Gets the workflow trigger callback URL relative path parameters."]
-    #[serde(rename = "relativePathParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "relativePathParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub relative_path_parameters: Vec<String>,
     #[doc = "Gets the workflow trigger callback URL query parameters."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6183,7 +6410,11 @@ impl WorkflowTriggerHistoryFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowTriggerHistoryListResult {
     #[doc = "A list of workflow trigger histories."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowTriggerHistory>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6272,7 +6503,11 @@ impl WorkflowTriggerListCallbackUrlQueries {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowTriggerListResult {
     #[doc = "A list of workflow triggers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowTrigger>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6459,7 +6694,11 @@ impl WorkflowVersion {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowVersionListResult {
     #[doc = "A list of workflow versions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowVersion>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6566,7 +6805,12 @@ pub struct WsdlService {
     #[serde(rename = "qualifiedName", default, skip_serializing_if = "Option::is_none")]
     pub qualified_name: Option<String>,
     #[doc = "The list of endpoints' qualified names."]
-    #[serde(rename = "EndpointQualifiedNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "EndpointQualifiedNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_qualified_names: Vec<String>,
 }
 impl WsdlService {
@@ -7160,19 +7404,39 @@ pub struct X12ProtocolSettings {
     #[serde(rename = "processingSettings")]
     pub processing_settings: X12ProcessingSettings,
     #[doc = "The X12 envelope override settings."]
-    #[serde(rename = "envelopeOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "envelopeOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub envelope_overrides: Vec<X12EnvelopeOverride>,
     #[doc = "The X12 validation override settings."]
-    #[serde(rename = "validationOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_overrides: Vec<X12ValidationOverride>,
     #[doc = "The X12 message filter list."]
-    #[serde(rename = "messageFilterList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "messageFilterList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub message_filter_list: Vec<X12MessageIdentifier>,
     #[doc = "The X12 schema references."]
     #[serde(rename = "schemaReferences")]
     pub schema_references: Vec<X12SchemaReference>,
     #[doc = "The X12 delimiter override settings."]
-    #[serde(rename = "x12DelimiterOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "x12DelimiterOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub x12_delimiter_overrides: Vec<X12DelimiterOverrides>,
 }
 impl X12ProtocolSettings {
diff --git a/services/mgmt/logz/src/package_2020_10_01/models.rs b/services/mgmt/logz/src/package_2020_10_01/models.rs
index 65cf8ceda7..c83c4c2403 100644
--- a/services/mgmt/logz/src/package_2020_10_01/models.rs
+++ b/services/mgmt/logz/src/package_2020_10_01/models.rs
@@ -31,10 +31,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -143,7 +152,12 @@ pub struct LogRules {
     #[serde(rename = "sendActivityLogs", default, skip_serializing_if = "Option::is_none")]
     pub send_activity_logs: Option<bool>,
     #[doc = "List of filtering tags to be used for capturing logs. This only takes effect if SendActivityLogs flag is enabled. If empty, all resources will be captured. If only Exclude action is specified, the rules will apply to the list of all available resources. If Include actions are specified, the rules will only include resources with the associated tags."]
-    #[serde(rename = "filteringTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filteringTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filtering_tags: Vec<FilteringTag>,
 }
 impl LogRules {
@@ -192,7 +206,11 @@ impl LogzMonitorResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogzMonitorResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogzMonitorResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -290,7 +308,11 @@ impl LogzSingleSignOnResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogzSingleSignOnResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogzSingleSignOnResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -457,7 +479,11 @@ impl MonitoredResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoredResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoredResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -544,7 +570,11 @@ impl MonitoringTagRules {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoringTagRulesListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoringTagRules>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -604,7 +634,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Logz provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -854,7 +888,11 @@ impl Serialize for UserRole {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserRoleListResponse {
     #[doc = "List of user roles for Logz.io account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserRoleResponse>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -914,7 +952,12 @@ impl VmExtensionPayload {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmHostUpdateRequest {
     #[doc = "Request of a list vm host update operation."]
-    #[serde(rename = "vmResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_resource_ids: Vec<VmResources>,
     #[doc = "Various states of the updating vm extension on resource"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -981,7 +1024,11 @@ impl VmResources {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmResourcesListResponse {
     #[doc = "Response of a list vm host update operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VmResources>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/logz/src/package_2020_10_01_preview/models.rs b/services/mgmt/logz/src/package_2020_10_01_preview/models.rs
index 65cf8ceda7..c83c4c2403 100644
--- a/services/mgmt/logz/src/package_2020_10_01_preview/models.rs
+++ b/services/mgmt/logz/src/package_2020_10_01_preview/models.rs
@@ -31,10 +31,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -143,7 +152,12 @@ pub struct LogRules {
     #[serde(rename = "sendActivityLogs", default, skip_serializing_if = "Option::is_none")]
     pub send_activity_logs: Option<bool>,
     #[doc = "List of filtering tags to be used for capturing logs. This only takes effect if SendActivityLogs flag is enabled. If empty, all resources will be captured. If only Exclude action is specified, the rules will apply to the list of all available resources. If Include actions are specified, the rules will only include resources with the associated tags."]
-    #[serde(rename = "filteringTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filteringTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filtering_tags: Vec<FilteringTag>,
 }
 impl LogRules {
@@ -192,7 +206,11 @@ impl LogzMonitorResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogzMonitorResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogzMonitorResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -290,7 +308,11 @@ impl LogzSingleSignOnResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogzSingleSignOnResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogzSingleSignOnResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -457,7 +479,11 @@ impl MonitoredResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoredResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoredResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -544,7 +570,11 @@ impl MonitoringTagRules {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoringTagRulesListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoringTagRules>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -604,7 +634,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Logz provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -854,7 +888,11 @@ impl Serialize for UserRole {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserRoleListResponse {
     #[doc = "List of user roles for Logz.io account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserRoleResponse>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -914,7 +952,12 @@ impl VmExtensionPayload {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmHostUpdateRequest {
     #[doc = "Request of a list vm host update operation."]
-    #[serde(rename = "vmResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_resource_ids: Vec<VmResources>,
     #[doc = "Various states of the updating vm extension on resource"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -981,7 +1024,11 @@ impl VmResources {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmResourcesListResponse {
     #[doc = "Response of a list vm host update operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VmResources>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/logz/src/package_2022_01_01_preview/models.rs b/services/mgmt/logz/src/package_2022_01_01_preview/models.rs
index 1f98f42120..e015680683 100644
--- a/services/mgmt/logz/src/package_2022_01_01_preview/models.rs
+++ b/services/mgmt/logz/src/package_2022_01_01_preview/models.rs
@@ -31,10 +31,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -143,7 +152,12 @@ pub struct LogRules {
     #[serde(rename = "sendActivityLogs", default, skip_serializing_if = "Option::is_none")]
     pub send_activity_logs: Option<bool>,
     #[doc = "List of filtering tags to be used for capturing logs. This only takes effect if SendActivityLogs flag is enabled. If empty, all resources will be captured. If only Exclude action is specified, the rules will apply to the list of all available resources. If Include actions are specified, the rules will only include resources with the associated tags."]
-    #[serde(rename = "filteringTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filteringTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filtering_tags: Vec<FilteringTag>,
 }
 impl LogRules {
@@ -192,7 +206,11 @@ impl LogzMetricsResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogzMetricsResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogzMetricsResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -259,7 +277,11 @@ impl LogzMonitorResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogzMonitorResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogzMonitorResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -357,7 +379,11 @@ impl LogzSingleSignOnResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogzSingleSignOnResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogzSingleSignOnResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -459,7 +485,12 @@ pub struct MetricRules {
     #[serde(rename = "subscriptionId", default, skip_serializing_if = "Option::is_none")]
     pub subscription_id: Option<String>,
     #[doc = "List of filtering tags to be used for capturing metrics. If empty, all resources will be captured. If only Exclude action is specified, the rules will apply to the list of all available resources. If Include actions are specified, the rules will only include resources with the associated tags."]
-    #[serde(rename = "filteringTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filteringTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filtering_tags: Vec<FilteringTag>,
 }
 impl MetricRules {
@@ -495,7 +526,11 @@ impl MetricsTagRules {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricsTagRulesListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetricsTagRules>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -521,7 +556,12 @@ pub struct MetricsTagRulesProperties {
     #[doc = "Flag specifying if metrics from Azure resources should be sent for the Monitor resource."]
     #[serde(rename = "sendMetrics", default, skip_serializing_if = "Option::is_none")]
     pub send_metrics: Option<bool>,
-    #[serde(rename = "metricRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_rules: Vec<MetricRules>,
     #[doc = "Metadata pertaining to creation and last modification of the resource."]
     #[serde(rename = "systemData", default, skip_serializing_if = "Option::is_none")]
@@ -604,7 +644,11 @@ impl MonitoredResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoredResourceListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoredResource>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -691,7 +735,11 @@ impl MonitoringTagRules {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitoringTagRulesListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitoringTagRules>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -751,7 +799,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Logz provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1001,7 +1053,11 @@ impl Serialize for UserRole {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserRoleListResponse {
     #[doc = "List of user roles for Logz.io account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UserRoleResponse>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1061,7 +1117,12 @@ impl VmExtensionPayload {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmHostUpdateRequest {
     #[doc = "Request of a list vm host update operation."]
-    #[serde(rename = "vmResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_resource_ids: Vec<VmResources>,
     #[doc = "Various states of the updating vm extension on resource"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1128,7 +1189,11 @@ impl VmResources {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmResourcesListResponse {
     #[doc = "Response of a list vm host update operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VmResources>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/m365securityandcompliance/src/package_2021_03_25_preview/models.rs b/services/mgmt/m365securityandcompliance/src/package_2021_03_25_preview/models.rs
index 1322d2b416..edf94f6247 100644
--- a/services/mgmt/m365securityandcompliance/src/package_2021_03_25_preview/models.rs
+++ b/services/mgmt/m365securityandcompliance/src/package_2021_03_25_preview/models.rs
@@ -88,7 +88,11 @@ pub struct OperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service operations supported by the Microsoft.M365SecurityAndCompliance resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -205,7 +209,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -345,7 +353,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -363,10 +375,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -416,7 +438,11 @@ pub struct PrivateLinkServicesForEdmUploadDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForEdmUploadDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForEdmUploadDescriptionListResult {
@@ -454,7 +480,11 @@ pub struct PrivateLinkServicesForM365ComplianceCenterDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForM365ComplianceCenterDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForM365ComplianceCenterDescriptionListResult {
@@ -492,7 +522,11 @@ pub struct PrivateLinkServicesForM365SecurityCenterDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForM365SecurityCenterDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForM365SecurityCenterDescriptionListResult {
@@ -530,7 +564,11 @@ pub struct PrivateLinkServicesForMipPolicySyncDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForMipPolicySyncDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForMipPolicySyncDescriptionListResult {
@@ -568,7 +606,11 @@ pub struct PrivateLinkServicesForO365ManagementActivityApiDescriptionListResult
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForO365ManagementActivityApiDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForO365ManagementActivityApiDescriptionListResult {
@@ -606,7 +648,11 @@ pub struct PrivateLinkServicesForSccPowershellDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForSccPowershellDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForSccPowershellDescriptionListResult {
@@ -674,13 +720,25 @@ pub type ServiceCorsConfigurationHeaderEntry = String;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceCorsConfigurationInfo {
     #[doc = "The origins to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<ServiceCorsConfigurationOriginEntry>,
     #[doc = "The headers to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ServiceCorsConfigurationHeaderEntry>,
     #[doc = "The methods to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub methods: Vec<ServiceCorsConfigurationMethodEntry>,
     #[doc = "The max age to be allowed via CORS."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -760,7 +818,12 @@ pub struct ServicesProperties {
     #[serde(rename = "exportConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub export_configuration: Option<ServiceExportConfigurationInfo>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/machinelearning/src/package_commitmentplans_2016_05_preview/models.rs b/services/mgmt/machinelearning/src/package_commitmentplans_2016_05_preview/models.rs
index 77d985674d..3a8e074431 100644
--- a/services/mgmt/machinelearning/src/package_commitmentplans_2016_05_preview/models.rs
+++ b/services/mgmt/machinelearning/src/package_commitmentplans_2016_05_preview/models.rs
@@ -16,19 +16,35 @@ pub struct CatalogSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tier: Option<String>,
     #[doc = "Regions where the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Describes scaling information of a SKU."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<SkuCapacity>,
     #[doc = "The capability information for the specified SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
     #[doc = "The cost information for the specified SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "Restrictions which would prevent a SKU from being used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<SkuRestrictions>,
 }
 impl CatalogSku {
@@ -64,7 +80,11 @@ pub struct CommitmentAssociationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The set of results for this page."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CommitmentAssociation>,
 }
 impl azure_core::Continuable for CommitmentAssociationListResult {
@@ -128,7 +148,11 @@ pub struct CommitmentPlanListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The set of results for this page."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CommitmentPlan>,
 }
 impl azure_core::Continuable for CommitmentPlanListResult {
@@ -248,7 +272,11 @@ impl OperationEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationEntityListResult {
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
@@ -320,7 +348,11 @@ pub struct PlanUsageHistoryListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The set of results for this page."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PlanUsageHistory>,
 }
 impl azure_core::Continuable for PlanUsageHistoryListResult {
@@ -480,7 +512,11 @@ impl SkuCost {
 #[doc = "The list of commitment plan SKUs."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CatalogSku>,
 }
 impl azure_core::Continuable for SkuListResult {
@@ -501,7 +537,11 @@ pub struct SkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for restriction."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/machinelearning/src/package_webservices_2016_05_preview/models.rs b/services/mgmt/machinelearning/src/package_webservices_2016_05_preview/models.rs
index aef86d3f8d..442f384e18 100644
--- a/services/mgmt/machinelearning/src/package_webservices_2016_05_preview/models.rs
+++ b/services/mgmt/machinelearning/src/package_webservices_2016_05_preview/models.rs
@@ -27,7 +27,11 @@ pub struct AssetItem {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
     #[doc = "If the asset is a custom module, this holds the module's parameters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ModuleAssetParameter>,
 }
 impl AssetItem {
@@ -108,7 +112,12 @@ pub struct ColumnSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub format: Option<column_specification::Format>,
     #[doc = "If the data type is categorical, this provides the list of accepted categories."]
-    #[serde(rename = "enum", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enum",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enum_: Vec<serde_json::Value>,
     #[doc = "Flag indicating if the type supports null values or not."]
     #[serde(rename = "x-ms-isnullable", default, skip_serializing_if = "Option::is_none")]
@@ -372,7 +381,11 @@ pub struct GraphPackage {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub nodes: Option<serde_json::Value>,
     #[doc = "The list of edges making up the graph."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub edges: Vec<GraphEdge>,
     #[doc = "The collection of global parameters for the graph, given as a global parameter name to GraphParameter map. Each parameter here has a 1:1 match with the global parameters values map declared at the WebServiceProperties level."]
     #[serde(rename = "graphParameters", default, skip_serializing_if = "Option::is_none")]
@@ -552,7 +565,11 @@ pub struct ModeValueInfo {
     #[serde(rename = "interfaceString", default, skip_serializing_if = "Option::is_none")]
     pub interface_string: Option<String>,
     #[doc = "The definition of the parameter."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ModuleAssetParameter>,
 }
 impl ModeValueInfo {
@@ -637,7 +654,11 @@ pub mod output_port {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PaginatedWebServicesList {
     #[doc = "An array of web service objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WebService>,
     #[doc = "A continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/machinelearning/src/package_webservices_2017_01/models.rs b/services/mgmt/machinelearning/src/package_webservices_2017_01/models.rs
index 6a0e592b05..bb066c425a 100644
--- a/services/mgmt/machinelearning/src/package_webservices_2017_01/models.rs
+++ b/services/mgmt/machinelearning/src/package_webservices_2017_01/models.rs
@@ -27,7 +27,11 @@ pub struct AssetItem {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
     #[doc = "If the asset is a custom module, this holds the module's parameters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ModuleAssetParameter>,
 }
 impl AssetItem {
@@ -97,7 +101,11 @@ pub struct AsyncOperationErrorInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "An array containing error information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<AsyncOperationErrorInfo>,
 }
 impl AsyncOperationErrorInfo {
@@ -203,7 +211,12 @@ pub struct ColumnSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub format: Option<column_specification::Format>,
     #[doc = "If the data type is categorical, this provides the list of accepted categories."]
-    #[serde(rename = "enum", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enum",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enum_: Vec<serde_json::Value>,
     #[doc = "Flag indicating if the type supports null values or not."]
     #[serde(rename = "x-ms-isnullable", default, skip_serializing_if = "Option::is_none")]
@@ -467,7 +480,11 @@ pub struct GraphPackage {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub nodes: Option<serde_json::Value>,
     #[doc = "The list of edges making up the graph."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub edges: Vec<GraphEdge>,
     #[doc = "The collection of global parameters for the graph, given as a global parameter name to GraphParameter map. Each parameter here has a 1:1 match with the global parameters values map declared at the WebServiceProperties level."]
     #[serde(rename = "graphParameters", default, skip_serializing_if = "Option::is_none")]
@@ -647,7 +664,11 @@ pub struct ModeValueInfo {
     #[serde(rename = "interfaceString", default, skip_serializing_if = "Option::is_none")]
     pub interface_string: Option<String>,
     #[doc = "The definition of the parameter."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ModuleAssetParameter>,
 }
 impl ModeValueInfo {
@@ -713,7 +734,11 @@ impl OperationEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationEntityListResult {
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
@@ -786,7 +811,11 @@ pub mod output_port {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PaginatedWebServicesList {
     #[doc = "An array of web service objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WebService>,
     #[doc = "A continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/machinelearning/src/package_workspaces_2016_04/models.rs b/services/mgmt/machinelearning/src/package_workspaces_2016_04/models.rs
index 0805f83688..645e3c7c50 100644
--- a/services/mgmt/machinelearning/src/package_workspaces_2016_04/models.rs
+++ b/services/mgmt/machinelearning/src/package_workspaces_2016_04/models.rs
@@ -65,7 +65,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of AML Studio operations supported by the AML Studio resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -144,7 +148,11 @@ impl WorkspaceKeysResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "The list of machine learning workspaces. Since this list may be incomplete, the nextLink field should be used to request the next list of machine learning workspaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
     #[doc = "The URI that can be used to request the next list of machine learning workspaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/machinelearning/src/package_workspaces_2019_10/models.rs b/services/mgmt/machinelearning/src/package_workspaces_2019_10/models.rs
index 6080fceac1..e9cff2a596 100644
--- a/services/mgmt/machinelearning/src/package_workspaces_2019_10/models.rs
+++ b/services/mgmt/machinelearning/src/package_workspaces_2019_10/models.rs
@@ -65,7 +65,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of AML Studio operations supported by the AML Studio resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -163,7 +167,11 @@ impl WorkspaceKeysResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "The list of machine learning workspaces. Since this list may be incomplete, the nextLink field should be used to request the next list of machine learning workspaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
     #[doc = "The URI that can be used to request the next list of machine learning workspaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/machinelearningcompute/src/package_2017_06_preview/models.rs b/services/mgmt/machinelearningcompute/src/package_2017_06_preview/models.rs
index 0f4efed667..08c4d9b9b2 100644
--- a/services/mgmt/machinelearningcompute/src/package_2017_06_preview/models.rs
+++ b/services/mgmt/machinelearningcompute/src/package_2017_06_preview/models.rs
@@ -16,7 +16,12 @@ pub struct AcsClusterProperties {
     #[serde(rename = "orchestratorProperties")]
     pub orchestrator_properties: KubernetesClusterProperties,
     #[doc = "The system services deployed to the cluster"]
-    #[serde(rename = "systemServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "systemServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub system_services: Vec<SystemServices>,
     #[doc = "The number of agent nodes in the Container Service. This can be changed to scale the cluster."]
     #[serde(rename = "agentCount", default, skip_serializing_if = "Option::is_none")]
@@ -282,7 +287,11 @@ pub struct AsyncOperationErrorInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "An array containing error information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<AsyncOperationErrorInfo>,
 }
 impl AsyncOperationErrorInfo {
@@ -439,7 +448,11 @@ pub mod auto_scale_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "An array of available operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceOperation>,
 }
 impl AvailableOperations {
@@ -568,7 +581,11 @@ pub struct ErrorResponse {
     #[doc = "Error message"]
     pub message: String,
     #[doc = "An array of error detail objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
 }
 impl ErrorResponse {
@@ -805,7 +822,11 @@ impl OperationalizationClusterUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PaginatedOperationalizationClustersList {
     #[doc = "An array of cluster objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationalizationCluster>,
     #[doc = "A continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/machinelearningcompute/src/package_2017_08_preview/models.rs b/services/mgmt/machinelearningcompute/src/package_2017_08_preview/models.rs
index 299bcb47e7..dc1c57d6c5 100644
--- a/services/mgmt/machinelearningcompute/src/package_2017_08_preview/models.rs
+++ b/services/mgmt/machinelearningcompute/src/package_2017_08_preview/models.rs
@@ -16,7 +16,12 @@ pub struct AcsClusterProperties {
     #[serde(rename = "orchestratorProperties", default, skip_serializing_if = "Option::is_none")]
     pub orchestrator_properties: Option<KubernetesClusterProperties>,
     #[doc = "The system services deployed to the cluster"]
-    #[serde(rename = "systemServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "systemServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub system_services: Vec<SystemService>,
     #[doc = "The number of master nodes in the container service."]
     #[serde(rename = "masterCount", default, skip_serializing_if = "Option::is_none")]
@@ -360,7 +365,11 @@ pub mod auto_scale_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "An array of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceOperation>,
 }
 impl AvailableOperations {
@@ -492,7 +501,11 @@ pub struct ErrorResponse {
     #[doc = "Error message."]
     pub message: String,
     #[doc = "An array of error detail objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
 }
 impl ErrorResponse {
@@ -609,7 +622,12 @@ pub struct OperationalizationClusterProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<operationalization_cluster_properties::ProvisioningState>,
     #[doc = "List of provisioning errors reported by the resource provider."]
-    #[serde(rename = "provisioningErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisioningErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provisioning_errors: Vec<ErrorResponseWrapper>,
     #[doc = "The cluster type."]
     #[serde(rename = "clusterType")]
@@ -751,7 +769,11 @@ impl OperationalizationClusterUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PaginatedOperationalizationClustersList {
     #[doc = "An array of cluster objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationalizationCluster>,
     #[doc = "A continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/machinelearningexperimentation/src/package_2017_05_preview/models.rs b/services/mgmt/machinelearningexperimentation/src/package_2017_05_preview/models.rs
index 3721ed05a3..2588c28875 100644
--- a/services/mgmt/machinelearningexperimentation/src/package_2017_05_preview/models.rs
+++ b/services/mgmt/machinelearningexperimentation/src/package_2017_05_preview/models.rs
@@ -24,7 +24,11 @@ impl Account {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountListResult {
     #[doc = "The list of machine learning team accounts. Since this list may be incomplete, the nextLink field should be used to request the next list of machine learning team accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
     #[doc = "The URI that can be used to request the next list of machine learning team accounts."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -201,7 +205,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of AML team account operations supported by the AML team account resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -236,7 +244,11 @@ impl Project {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProjectListResult {
     #[doc = "The list of projects. Since this list may be incomplete, the nextLink field should be used to request the next list of projects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Project>,
     #[doc = "The URI that can be used to request the next list of projects."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -408,7 +420,11 @@ impl Workspace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "The list of machine learning team account workspaces. Since this list may be incomplete, the nextLink field should be used to request the next list of machine learning team accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
     #[doc = "The URI that can be used to request the next list of machine learning workspaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/machinelearningservices/src/package_2022_01_01_preview/models.rs b/services/mgmt/machinelearningservices/src/package_2022_01_01_preview/models.rs
index 2db886eba2..10a9c4bb58 100644
--- a/services/mgmt/machinelearningservices/src/package_2022_01_01_preview/models.rs
+++ b/services/mgmt/machinelearningservices/src/package_2022_01_01_preview/models.rs
@@ -26,7 +26,12 @@ pub mod aks {
         #[serde(rename = "clusterFqdn", default, skip_serializing_if = "Option::is_none")]
         pub cluster_fqdn: Option<String>,
         #[doc = "System services"]
-        #[serde(rename = "systemServices", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "systemServices",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub system_services: Vec<SystemService>,
         #[doc = "Number of agents"]
         #[serde(rename = "agentCount", default, skip_serializing_if = "Option::is_none")]
@@ -299,7 +304,11 @@ pub mod aml_compute_node_information {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AmlComputeNodesInformation {
     #[doc = "The collection of returned AmlCompute nodes details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<AmlComputeNodeInformation>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -353,7 +362,11 @@ pub struct AmlComputeProperties {
     #[serde(rename = "allocationStateTransitionTime", default, with = "azure_core::date::rfc3339::option")]
     pub allocation_state_transition_time: Option<time::OffsetDateTime>,
     #[doc = "Collection of errors encountered by various compute nodes during node setup."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ErrorResponse>,
     #[doc = "The number of compute nodes currently assigned to the compute."]
     #[serde(rename = "currentNodeCount", default, skip_serializing_if = "Option::is_none")]
@@ -646,7 +659,12 @@ pub struct Compute {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Errors during provisioning"]
-    #[serde(rename = "provisioningErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisioningErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provisioning_errors: Vec<ErrorResponse>,
     #[doc = "Indicating whether the compute was provisioned by user and brought from outside if true, or machine learning service provisioned it if false."]
     #[serde(rename = "isAttachedCompute", default, skip_serializing_if = "Option::is_none")]
@@ -917,13 +935,21 @@ pub struct ComputeInstanceProperties {
     #[serde(rename = "connectivityEndpoints", default, skip_serializing_if = "Option::is_none")]
     pub connectivity_endpoints: Option<ComputeInstanceConnectivityEndpoints>,
     #[doc = "Describes available applications and their endpoints on this ComputeInstance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applications: Vec<ComputeInstanceApplication>,
     #[doc = "Describes information on user who created this ComputeInstance."]
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
     pub created_by: Option<ComputeInstanceCreatedBy>,
     #[doc = "Collection of errors encountered on this ComputeInstance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ErrorResponse>,
     #[doc = "Current state of an ComputeInstance."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1439,23 +1465,68 @@ pub mod diagnose_response_result {
     use super::*;
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Value {
-        #[serde(rename = "userDefinedRouteResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "userDefinedRouteResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub user_defined_route_results: Vec<DiagnoseResult>,
-        #[serde(rename = "networkSecurityRuleResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "networkSecurityRuleResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub network_security_rule_results: Vec<DiagnoseResult>,
-        #[serde(rename = "resourceLockResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceLockResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_lock_results: Vec<DiagnoseResult>,
-        #[serde(rename = "dnsResolutionResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "dnsResolutionResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub dns_resolution_results: Vec<DiagnoseResult>,
-        #[serde(rename = "storageAccountResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "storageAccountResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub storage_account_results: Vec<DiagnoseResult>,
-        #[serde(rename = "keyVaultResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "keyVaultResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub key_vault_results: Vec<DiagnoseResult>,
-        #[serde(rename = "containerRegistryResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "containerRegistryResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub container_registry_results: Vec<DiagnoseResult>,
-        #[serde(rename = "applicationInsightsResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "applicationInsightsResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub application_insights_results: Vec<DiagnoseResult>,
-        #[serde(rename = "otherResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "otherResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub other_results: Vec<DiagnoseResult>,
     }
     impl Value {
@@ -1634,10 +1705,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -1865,7 +1945,11 @@ pub mod estimated_vm_prices {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExternalFqdnResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FqdnEndpoints>,
 }
 impl ExternalFqdnResponse {
@@ -1877,7 +1961,12 @@ impl ExternalFqdnResponse {
 pub struct FqdnEndpoint {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<FqdnEndpointDetail>,
 }
 impl FqdnEndpoint {
@@ -1909,7 +1998,11 @@ impl FqdnEndpoints {
 pub struct FqdnEndpointsProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<FqdnEndpoint>,
 }
 impl FqdnEndpointsProperties {
@@ -2121,7 +2214,11 @@ impl KubernetesSchema {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListAmlUserFeatureResult {
     #[doc = "The list of AML user facing features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AmlUserFeature>,
     #[doc = "The URI to fetch the next page of AML user features information. Call ListNext() with this to fetch the next page of AML user features information."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2164,7 +2261,11 @@ impl ListStorageAccountKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListUsagesResult {
     #[doc = "The list of AML resource usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "The URI to fetch the next page of AML resource usage information. Call ListNext() with this to fetch the next page of AML resource usage information."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2203,7 +2304,11 @@ impl ListWorkspaceKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListWorkspaceQuotas {
     #[doc = "The list of Workspace Quotas by VM Family"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceQuota>,
     #[doc = "The URI to fetch the next page of workspace quota information by VM Family. Call ListNext() with this to fetch the next page of Workspace Quota information."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2341,7 +2446,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of AML workspace operations supported by the AML workspace resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -2359,7 +2468,11 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PaginatedComputeResourcesList {
     #[doc = "An array of Machine Learning compute objects wrapped in ARM resource envelope."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputeResource>,
     #[doc = "A continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2380,7 +2493,11 @@ impl PaginatedComputeResourcesList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PaginatedWorkspaceConnectionsList {
     #[doc = "An array of Workspace connection objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkspaceConnection>,
     #[doc = "A continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2469,7 +2586,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -2622,7 +2743,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -2637,10 +2762,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -2729,7 +2864,11 @@ pub mod quota_base_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaUpdateParameters {
     #[doc = "The list for update quota."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaBaseProperties>,
     #[doc = "Region of workspace quota to be updated."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2746,7 +2885,11 @@ pub struct RegistryListCredentialsResult {
     pub location: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub username: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<Password>,
 }
 impl RegistryListCredentialsResult {
@@ -2869,10 +3012,19 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "List of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ResourceSkuZoneDetails>,
 }
 impl ResourceSkuLocationInfo {
@@ -2884,10 +3036,18 @@ impl ResourceSkuLocationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuZoneDetails {
     #[doc = "The set of zones that the SKU is available in with the specified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
     #[doc = "A list of capabilities that are available for the SKU in the specified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl ResourceSkuZoneDetails {
@@ -2902,7 +3062,11 @@ pub struct Restriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for the restriction."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -3130,7 +3294,11 @@ impl Sku {
 #[doc = "List of skus with features"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkspaceSku>,
     #[doc = "The URI to fetch the next page of Workspace Skus. Call ListNext() with this URI to fetch the next page of Workspace Skus"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3376,7 +3544,11 @@ pub mod update_workspace_quotas {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UpdateWorkspaceQuotasResult {
     #[doc = "The list of workspace quota update result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UpdateWorkspaceQuotas>,
     #[doc = "The URI to fetch the next page of workspace quota update result. Call ListNext() with this to fetch the next page of Workspace Quota update result."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3619,7 +3791,12 @@ pub struct VirtualMachineSize {
     #[serde(rename = "estimatedVMPrices", default, skip_serializing_if = "Option::is_none")]
     pub estimated_vm_prices: Option<EstimatedVmPrices>,
     #[doc = "Specifies the compute types supported by the virtual machine size."]
-    #[serde(rename = "supportedComputeTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedComputeTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_compute_types: Vec<String>,
 }
 impl VirtualMachineSize {
@@ -3631,7 +3808,11 @@ impl VirtualMachineSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineSizeListResult {
     #[doc = "The list of virtual machine sizes supported by AmlCompute."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineSize>,
 }
 impl VirtualMachineSizeListResult {
@@ -3777,7 +3958,11 @@ pub mod workspace_connection_props {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "The list of machine learning workspaces. Since this list may be incomplete, the nextLink field should be used to request the next list of machine learning workspaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
     #[doc = "The URI that can be used to request the next list of machine learning workspaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3851,10 +4036,20 @@ pub struct WorkspaceProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<workspace_properties::PublicNetworkAccess>,
     #[doc = "The list of private endpoint connections in the workspace."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources in this workspace."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
     #[serde(rename = "notebookInfo", default, skip_serializing_if = "Option::is_none")]
     pub notebook_info: Option<NotebookResourceInfo>,
@@ -4109,10 +4304,19 @@ pub mod workspace_properties_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceSku {
     #[doc = "The set of locations that the SKU is available. This will be supported and registered Azure Geo Regions (e.g. West US, East US, Southeast Asia, etc.)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "A list of locations and availability zones in those locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "Sku Tier like Basic or Enterprise"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4122,10 +4326,18 @@ pub struct WorkspaceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of features/user capabilities associated with the sku"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<Restriction>,
 }
 impl WorkspaceSku {
diff --git a/services/mgmt/machinelearningservices/src/package_2022_02_01_preview/models.rs b/services/mgmt/machinelearningservices/src/package_2022_02_01_preview/models.rs
index 6c2d090ae5..cf196c46d1 100644
--- a/services/mgmt/machinelearningservices/src/package_2022_02_01_preview/models.rs
+++ b/services/mgmt/machinelearningservices/src/package_2022_02_01_preview/models.rs
@@ -39,7 +39,12 @@ pub mod aks_schema {
         #[serde(rename = "clusterFqdn", default, skip_serializing_if = "Option::is_none")]
         pub cluster_fqdn: Option<String>,
         #[doc = "System services"]
-        #[serde(rename = "systemServices", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "systemServices",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub system_services: Vec<SystemService>,
         #[doc = "Number of agents"]
         #[serde(rename = "agentCount", default, skip_serializing_if = "Option::is_none")]
@@ -347,7 +352,11 @@ pub mod aml_compute_node_information {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AmlComputeNodesInformation {
     #[doc = "The collection of returned AmlCompute nodes details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<AmlComputeNodeInformation>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -401,7 +410,11 @@ pub struct AmlComputeProperties {
     #[serde(rename = "allocationStateTransitionTime", default, with = "azure_core::date::rfc3339::option")]
     pub allocation_state_transition_time: Option<time::OffsetDateTime>,
     #[doc = "Collection of errors encountered by various compute nodes during node setup."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ErrorResponse>,
     #[doc = "The number of compute nodes currently assigned to the compute."]
     #[serde(rename = "currentNodeCount", default, skip_serializing_if = "Option::is_none")]
@@ -645,7 +658,11 @@ pub mod aml_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AmlOperationListResult {
     #[doc = "List of AML workspace operations supported by the AML workspace resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AmlOperation>,
 }
 impl azure_core::Continuable for AmlOperationListResult {
@@ -1125,7 +1142,11 @@ pub struct BatchDeploymentTrackedResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type BatchDeployment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BatchDeploymentTrackedResource>,
 }
 impl azure_core::Continuable for BatchDeploymentTrackedResourceArmPaginatedResult {
@@ -1206,7 +1227,11 @@ pub struct BatchEndpointTrackedResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type BatchEndpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BatchEndpointTrackedResource>,
 }
 impl azure_core::Continuable for BatchEndpointTrackedResourceArmPaginatedResult {
@@ -1406,10 +1431,20 @@ pub struct Classification {
     #[serde(flatten)]
     pub auto_ml_vertical: AutoMlVertical,
     #[doc = "Allowed models for classification task."]
-    #[serde(rename = "allowedModels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedModels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_models: Vec<ClassificationModels>,
     #[doc = "Blocked models for classification task."]
-    #[serde(rename = "blockedModels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockedModels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocked_models: Vec<ClassificationModels>,
     #[doc = "Primary metrics for classification tasks."]
     #[serde(rename = "primaryMetric", default, skip_serializing_if = "Option::is_none")]
@@ -1666,7 +1701,11 @@ pub struct CodeContainerResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type CodeContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CodeContainerResource>,
 }
 impl azure_core::Continuable for CodeContainerResourceArmPaginatedResult {
@@ -1717,7 +1756,11 @@ pub struct CodeVersionResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type CodeVersion."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CodeVersionResource>,
 }
 impl azure_core::Continuable for CodeVersionResourceArmPaginatedResult {
@@ -1735,7 +1778,11 @@ impl CodeVersionResourceArmPaginatedResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ColumnTransformer {
     #[doc = "Fields to apply transformer logic on."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fields: Vec<String>,
     #[doc = "Different properties to be passed to transformer.\r\nInput expected is dictionary of key,value pairs in JSON format."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1842,7 +1889,11 @@ pub struct ComponentContainerResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type ComponentContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComponentContainerResource>,
 }
 impl azure_core::Continuable for ComponentContainerResourceArmPaginatedResult {
@@ -1893,7 +1944,11 @@ pub struct ComponentVersionResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type ComponentVersion."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComponentVersionResource>,
 }
 impl azure_core::Continuable for ComponentVersionResourceArmPaginatedResult {
@@ -1932,7 +1987,12 @@ pub struct Compute {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Errors during provisioning"]
-    #[serde(rename = "provisioningErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisioningErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provisioning_errors: Vec<ErrorResponse>,
     #[doc = "Indicating whether the compute was provisioned by user and brought from outside if true, or machine learning service provisioned it if false."]
     #[serde(rename = "isAttachedCompute", default, skip_serializing_if = "Option::is_none")]
@@ -2072,7 +2132,11 @@ pub struct ComputeInstanceContainer {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub environment: Option<ComputeInstanceEnvironmentInfo>,
     #[doc = "services of this containers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub services: Vec<serde_json::Value>,
 }
 impl ComputeInstanceContainer {
@@ -2636,13 +2700,21 @@ pub struct ComputeInstanceProperties {
     #[serde(rename = "connectivityEndpoints", default, skip_serializing_if = "Option::is_none")]
     pub connectivity_endpoints: Option<ComputeInstanceConnectivityEndpoints>,
     #[doc = "Describes available applications and their endpoints on this ComputeInstance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applications: Vec<ComputeInstanceApplication>,
     #[doc = "Describes information on user who created this ComputeInstance."]
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
     pub created_by: Option<ComputeInstanceCreatedBy>,
     #[doc = "Collection of errors encountered on this ComputeInstance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ErrorResponse>,
     #[doc = "Current state of an ComputeInstance."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2666,13 +2738,27 @@ pub struct ComputeInstanceProperties {
     #[serde(rename = "enableNodePublicIp", default, skip_serializing_if = "Option::is_none")]
     pub enable_node_public_ip: Option<bool>,
     #[doc = "Describes informations of containers on this ComputeInstance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub containers: Vec<ComputeInstanceContainer>,
     #[doc = "Describes informations of dataDisks on this ComputeInstance."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<ComputeInstanceDataDisk>,
     #[doc = "Describes informations of dataMounts on this ComputeInstance."]
-    #[serde(rename = "dataMounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataMounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_mounts: Vec<ComputeInstanceDataMount>,
     #[doc = "Version of computeInstance."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2999,7 +3085,12 @@ impl ComputeResourceSchema {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeSchedules {
     #[doc = "The list of compute start stop schedules to be applied."]
-    #[serde(rename = "computeStartStop", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "computeStartStop",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compute_start_stop: Vec<ComputeStartStopSchedule>,
 }
 impl ComputeSchedules {
@@ -3412,7 +3503,11 @@ pub struct DataContainerResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type DataContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataContainerResource>,
 }
 impl azure_core::Continuable for DataContainerResourceArmPaginatedResult {
@@ -3604,7 +3699,11 @@ pub struct DataVersionBaseResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type DataVersionBase."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataVersionBaseResource>,
 }
 impl azure_core::Continuable for DataVersionBaseResourceArmPaginatedResult {
@@ -3747,7 +3846,11 @@ pub struct DatastoreResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type Datastore."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatastoreResource>,
 }
 impl azure_core::Continuable for DatastoreResourceArmPaginatedResult {
@@ -3946,23 +4049,68 @@ pub mod diagnose_response_result {
     use super::*;
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Value {
-        #[serde(rename = "userDefinedRouteResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "userDefinedRouteResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub user_defined_route_results: Vec<DiagnoseResult>,
-        #[serde(rename = "networkSecurityRuleResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "networkSecurityRuleResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub network_security_rule_results: Vec<DiagnoseResult>,
-        #[serde(rename = "resourceLockResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceLockResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_lock_results: Vec<DiagnoseResult>,
-        #[serde(rename = "dnsResolutionResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "dnsResolutionResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub dns_resolution_results: Vec<DiagnoseResult>,
-        #[serde(rename = "storageAccountResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "storageAccountResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub storage_account_results: Vec<DiagnoseResult>,
-        #[serde(rename = "keyVaultResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "keyVaultResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub key_vault_results: Vec<DiagnoseResult>,
-        #[serde(rename = "containerRegistryResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "containerRegistryResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub container_registry_results: Vec<DiagnoseResult>,
-        #[serde(rename = "applicationInsightsResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "applicationInsightsResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub application_insights_results: Vec<DiagnoseResult>,
-        #[serde(rename = "otherResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "otherResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub other_results: Vec<DiagnoseResult>,
     }
     impl Value {
@@ -4523,7 +4671,11 @@ pub struct EnvironmentContainerResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type EnvironmentContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnvironmentContainerResource>,
 }
 impl azure_core::Continuable for EnvironmentContainerResourceArmPaginatedResult {
@@ -4625,7 +4777,11 @@ pub struct EnvironmentVersionResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type EnvironmentVersion."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnvironmentVersionResource>,
 }
 impl azure_core::Continuable for EnvironmentVersionResourceArmPaginatedResult {
@@ -4667,10 +4823,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -4898,7 +5063,11 @@ pub mod estimated_vm_prices {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExternalFqdnResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FqdnEndpoints>,
 }
 impl ExternalFqdnResponse {
@@ -4910,7 +5079,12 @@ impl ExternalFqdnResponse {
 pub struct FqdnEndpoint {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<FqdnEndpointDetail>,
 }
 impl FqdnEndpoint {
@@ -4942,7 +5116,11 @@ impl FqdnEndpoints {
 pub struct FqdnEndpointsProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<FqdnEndpoint>,
 }
 impl FqdnEndpointsProperties {
@@ -5105,10 +5283,20 @@ pub struct Forecasting {
     #[serde(flatten)]
     pub auto_ml_vertical: AutoMlVertical,
     #[doc = "Allowed models for forecasting task."]
-    #[serde(rename = "allowedModels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedModels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_models: Vec<ForecastingModels>,
     #[doc = "Blocked models for forecasting task."]
-    #[serde(rename = "blockedModels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockedModels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocked_models: Vec<ForecastingModels>,
     #[doc = "Forecasting specific parameters."]
     #[serde(rename = "forecastingSettings", default, skip_serializing_if = "Option::is_none")]
@@ -5287,7 +5475,12 @@ pub struct ForecastingSettings {
     #[serde(rename = "timeColumnName", default, skip_serializing_if = "Option::is_none")]
     pub time_column_name: Option<String>,
     #[doc = "The names of columns used to group a timeseries. It can be used to create multiple series.\r\nIf grain is not defined, the data set is assumed to be one time-series. This parameter is used with task type forecasting."]
-    #[serde(rename = "timeSeriesIdColumnNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeSeriesIdColumnNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_series_id_column_names: Vec<String>,
     #[doc = "Configure STL Decomposition of the time-series target column."]
     #[serde(rename = "useStl", default, skip_serializing_if = "Option::is_none")]
@@ -5524,7 +5717,12 @@ pub struct ImageClassificationBase {
     #[serde(rename = "modelSettings", default, skip_serializing_if = "Option::is_none")]
     pub model_settings: Option<ImageModelSettingsClassification>,
     #[doc = "Search space for sampling different combinations of models and their hyperparameters."]
-    #[serde(rename = "searchSpace", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchSpace",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_space: Vec<ImageModelDistributionSettingsClassification>,
 }
 impl ImageClassificationBase {
@@ -5975,7 +6173,12 @@ pub struct ImageObjectDetectionBase {
     #[serde(rename = "modelSettings", default, skip_serializing_if = "Option::is_none")]
     pub model_settings: Option<ImageModelSettingsObjectDetection>,
     #[doc = "Search space for sampling different combinations of models and their hyperparameters."]
-    #[serde(rename = "searchSpace", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchSpace",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_space: Vec<ImageModelDistributionSettingsObjectDetection>,
 }
 impl ImageObjectDetectionBase {
@@ -6279,7 +6482,11 @@ pub struct JobBaseResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type JobBase."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobBaseResource>,
 }
 impl azure_core::Continuable for JobBaseResourceArmPaginatedResult {
@@ -6861,7 +7068,11 @@ impl Serialize for LearningRateScheduler {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListAmlUserFeatureResult {
     #[doc = "The list of AML user facing features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AmlUserFeature>,
     #[doc = "The URI to fetch the next page of AML user features information. Call ListNext() with this to fetch the next page of AML user features information."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6904,7 +7115,11 @@ impl ListStorageAccountKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListUsagesResult {
     #[doc = "The list of AML resource usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "The URI to fetch the next page of AML resource usage information. Call ListNext() with this to fetch the next page of AML resource usage information."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6981,7 +7196,11 @@ impl ListWorkspaceKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListWorkspaceQuotas {
     #[doc = "The list of Workspace Quotas by VM Family"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceQuota>,
     #[doc = "The URI to fetch the next page of workspace quota information by VM Family. Call ListNext() with this to fetch the next page of Workspace Quota information."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7092,7 +7311,12 @@ pub struct MlTableData {
     #[serde(flatten)]
     pub data_version_base: DataVersionBase,
     #[doc = "Uris referenced in the MLTable definition (required for lineage)"]
-    #[serde(rename = "referencedUris", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "referencedUris",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub referenced_uris: Vec<String>,
 }
 impl MlTableData {
@@ -7282,7 +7506,11 @@ pub struct ModelContainerResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type ModelContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ModelContainerResource>,
 }
 impl azure_core::Continuable for ModelContainerResourceArmPaginatedResult {
@@ -7425,7 +7653,11 @@ pub struct ModelVersionResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type ModelVersion."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ModelVersionResource>,
 }
 impl azure_core::Continuable for ModelVersionResourceArmPaginatedResult {
@@ -7806,7 +8038,11 @@ pub struct OnlineDeploymentTrackedResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type OnlineDeployment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OnlineDeploymentTrackedResource>,
 }
 impl azure_core::Continuable for OnlineDeploymentTrackedResourceArmPaginatedResult {
@@ -7887,7 +8123,11 @@ pub struct OnlineEndpointTrackedResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type OnlineEndpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OnlineEndpointTrackedResource>,
 }
 impl azure_core::Continuable for OnlineEndpointTrackedResourceArmPaginatedResult {
@@ -8069,7 +8309,11 @@ impl OutputPathAssetReference {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PaginatedComputeResourcesList {
     #[doc = "An array of Machine Learning compute objects wrapped in ARM resource envelope."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputeResource>,
     #[doc = "A continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8090,7 +8334,11 @@ impl PaginatedComputeResourcesList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PaginatedWorkspaceConnectionsList {
     #[doc = "An array of Workspace connection objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkspaceConnection>,
     #[doc = "A continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8575,7 +8823,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -8725,7 +8977,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -8740,10 +8996,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -8910,7 +9176,11 @@ pub mod quota_base_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaUpdateParameters {
     #[doc = "The list for update quota."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaBaseProperties>,
     #[doc = "Region of workspace quota to be updated."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -9030,7 +9300,11 @@ pub struct RecurrencePattern {
     #[doc = "[Required] List of minutes for recurrence schedule pattern"]
     pub minutes: Vec<i32>,
     #[doc = "List of weekdays for recurrence schedule pattern"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weekdays: Vec<Weekday>,
 }
 impl RecurrencePattern {
@@ -9123,7 +9397,11 @@ pub struct RegistryListCredentialsResult {
     pub location: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub username: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<Password>,
 }
 impl RegistryListCredentialsResult {
@@ -9139,10 +9417,20 @@ pub struct Regression {
     #[serde(flatten)]
     pub auto_ml_vertical: AutoMlVertical,
     #[doc = "Allowed models for regression task."]
-    #[serde(rename = "allowedModels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedModels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_models: Vec<RegressionModels>,
     #[doc = "Blocked models for regression task."]
-    #[serde(rename = "blockedModels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockedModels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocked_models: Vec<RegressionModels>,
     #[doc = "Primary metrics for Regression task."]
     #[serde(rename = "primaryMetric", default, skip_serializing_if = "Option::is_none")]
@@ -10073,7 +10361,11 @@ pub struct SkuResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type SkuResource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuResource>,
 }
 impl azure_core::Continuable for SkuResourceArmPaginatedResult {
@@ -10491,13 +10783,23 @@ pub struct TableVerticalFeaturizationSettings {
     #[serde(flatten)]
     pub featurization_settings: FeaturizationSettings,
     #[doc = "These transformers shall not be used in featurization."]
-    #[serde(rename = "blockedTransformers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockedTransformers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocked_transformers: Vec<String>,
     #[doc = "Dictionary of column name and its type (int, float, string, datetime etc)."]
     #[serde(rename = "columnNameAndTypes", default, skip_serializing_if = "Option::is_none")]
     pub column_name_and_types: Option<serde_json::Value>,
     #[doc = "Columns to be dropped from data during featurization."]
-    #[serde(rename = "dropColumns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dropColumns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub drop_columns: Vec<String>,
     #[doc = "Determines whether to use Dnn based featurizers for data featurization."]
     #[serde(rename = "enableDnnFeaturization", default, skip_serializing_if = "Option::is_none")]
@@ -10550,7 +10852,12 @@ pub struct TableVerticalValidationDataSettings {
     #[serde(flatten)]
     pub validation_data_settings: ValidationDataSettings,
     #[doc = "Columns to use for CVSplit data."]
-    #[serde(rename = "cvSplitColumnNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cvSplitColumnNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cv_split_column_names: Vec<String>,
     #[doc = "N-Cross validations value."]
     #[serde(rename = "nCrossValidations", default, skip_serializing_if = "Option::is_none")]
@@ -11136,7 +11443,11 @@ pub mod update_workspace_quotas {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UpdateWorkspaceQuotasResult {
     #[doc = "The list of workspace quota update result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UpdateWorkspaceQuotas>,
     #[doc = "The URI to fetch the next page of workspace quota update result. Call ListNext() with this to fetch the next page of Workspace Quota update result."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11589,7 +11900,12 @@ pub struct VirtualMachineSize {
     #[serde(rename = "estimatedVMPrices", default, skip_serializing_if = "Option::is_none")]
     pub estimated_vm_prices: Option<EstimatedVmPrices>,
     #[doc = "Specifies the compute types supported by the virtual machine size."]
-    #[serde(rename = "supportedComputeTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedComputeTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_compute_types: Vec<String>,
 }
 impl VirtualMachineSize {
@@ -11601,7 +11917,11 @@ impl VirtualMachineSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineSizeListResult {
     #[doc = "The list of virtual machine sizes supported by AmlCompute."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineSize>,
 }
 impl VirtualMachineSizeListResult {
@@ -11784,7 +12104,11 @@ pub mod workspace_connection_props {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "The list of machine learning workspaces. Since this list may be incomplete, the nextLink field should be used to request the next list of machine learning workspaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
     #[doc = "The URI that can be used to request the next list of machine learning workspaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11852,10 +12176,20 @@ pub struct WorkspaceProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<workspace_properties::PublicNetworkAccess>,
     #[doc = "The list of private endpoint connections in the workspace."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources in this workspace."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
     #[serde(rename = "notebookInfo", default, skip_serializing_if = "Option::is_none")]
     pub notebook_info: Option<NotebookResourceInfo>,
diff --git a/services/mgmt/machinelearningservices/src/package_2022_05_01/models.rs b/services/mgmt/machinelearningservices/src/package_2022_05_01/models.rs
index 97840e2f55..8dfee49937 100644
--- a/services/mgmt/machinelearningservices/src/package_2022_05_01/models.rs
+++ b/services/mgmt/machinelearningservices/src/package_2022_05_01/models.rs
@@ -39,7 +39,12 @@ pub mod aks_schema {
         #[serde(rename = "clusterFqdn", default, skip_serializing_if = "Option::is_none")]
         pub cluster_fqdn: Option<String>,
         #[doc = "System services"]
-        #[serde(rename = "systemServices", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "systemServices",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub system_services: Vec<SystemService>,
         #[doc = "Number of agents"]
         #[serde(rename = "agentCount", default, skip_serializing_if = "Option::is_none")]
@@ -347,7 +352,11 @@ pub mod aml_compute_node_information {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AmlComputeNodesInformation {
     #[doc = "The collection of returned AmlCompute nodes details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<AmlComputeNodeInformation>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -401,7 +410,11 @@ pub struct AmlComputeProperties {
     #[serde(rename = "allocationStateTransitionTime", default, with = "azure_core::date::rfc3339::option")]
     pub allocation_state_transition_time: Option<time::OffsetDateTime>,
     #[doc = "Collection of errors encountered by various compute nodes during node setup."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ErrorResponse>,
     #[doc = "The number of compute nodes currently assigned to the compute."]
     #[serde(rename = "currentNodeCount", default, skip_serializing_if = "Option::is_none")]
@@ -645,7 +658,11 @@ pub mod aml_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AmlOperationListResult {
     #[doc = "List of AML workspace operations supported by the AML workspace resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AmlOperation>,
 }
 impl azure_core::Continuable for AmlOperationListResult {
@@ -1020,7 +1037,11 @@ pub struct BatchDeploymentTrackedResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type BatchDeployment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BatchDeploymentTrackedResource>,
 }
 impl azure_core::Continuable for BatchDeploymentTrackedResourceArmPaginatedResult {
@@ -1101,7 +1122,11 @@ pub struct BatchEndpointTrackedResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type BatchEndpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BatchEndpointTrackedResource>,
 }
 impl azure_core::Continuable for BatchEndpointTrackedResourceArmPaginatedResult {
@@ -1369,7 +1394,11 @@ pub struct CodeContainerResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type CodeContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CodeContainerResource>,
 }
 impl azure_core::Continuable for CodeContainerResourceArmPaginatedResult {
@@ -1420,7 +1449,11 @@ pub struct CodeVersionResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type CodeVersion."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CodeVersionResource>,
 }
 impl azure_core::Continuable for CodeVersionResourceArmPaginatedResult {
@@ -1530,7 +1563,11 @@ pub struct ComponentContainerResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type ComponentContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComponentContainerResource>,
 }
 impl azure_core::Continuable for ComponentContainerResourceArmPaginatedResult {
@@ -1581,7 +1618,11 @@ pub struct ComponentVersionResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type ComponentVersion."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComponentVersionResource>,
 }
 impl azure_core::Continuable for ComponentVersionResourceArmPaginatedResult {
@@ -1620,7 +1661,12 @@ pub struct Compute {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Errors during provisioning"]
-    #[serde(rename = "provisioningErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisioningErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provisioning_errors: Vec<ErrorResponse>,
     #[doc = "Indicating whether the compute was provisioned by user and brought from outside if true, or machine learning service provisioned it if false."]
     #[serde(rename = "isAttachedCompute", default, skip_serializing_if = "Option::is_none")]
@@ -1760,7 +1806,11 @@ pub struct ComputeInstanceContainer {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub environment: Option<ComputeInstanceEnvironmentInfo>,
     #[doc = "services of this containers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub services: Vec<serde_json::Value>,
 }
 impl ComputeInstanceContainer {
@@ -2324,13 +2374,21 @@ pub struct ComputeInstanceProperties {
     #[serde(rename = "connectivityEndpoints", default, skip_serializing_if = "Option::is_none")]
     pub connectivity_endpoints: Option<ComputeInstanceConnectivityEndpoints>,
     #[doc = "Describes available applications and their endpoints on this ComputeInstance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applications: Vec<ComputeInstanceApplication>,
     #[doc = "Describes information on user who created this ComputeInstance."]
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
     pub created_by: Option<ComputeInstanceCreatedBy>,
     #[doc = "Collection of errors encountered on this ComputeInstance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ErrorResponse>,
     #[doc = "Current state of an ComputeInstance."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2354,13 +2412,27 @@ pub struct ComputeInstanceProperties {
     #[serde(rename = "enableNodePublicIp", default, skip_serializing_if = "Option::is_none")]
     pub enable_node_public_ip: Option<bool>,
     #[doc = "Describes informations of containers on this ComputeInstance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub containers: Vec<ComputeInstanceContainer>,
     #[doc = "Describes informations of dataDisks on this ComputeInstance."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<ComputeInstanceDataDisk>,
     #[doc = "Describes informations of dataMounts on this ComputeInstance."]
-    #[serde(rename = "dataMounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataMounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_mounts: Vec<ComputeInstanceDataMount>,
     #[doc = "Version of computeInstance."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2687,7 +2759,12 @@ impl ComputeResourceSchema {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeSchedules {
     #[doc = "The list of compute start stop schedules to be applied."]
-    #[serde(rename = "computeStartStop", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "computeStartStop",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compute_start_stop: Vec<ComputeStartStopSchedule>,
 }
 impl ComputeSchedules {
@@ -3098,7 +3175,11 @@ pub struct DataContainerResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type DataContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataContainerResource>,
 }
 impl azure_core::Continuable for DataContainerResourceArmPaginatedResult {
@@ -3270,7 +3351,11 @@ pub struct DataVersionBaseResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type DataVersionBase."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataVersionBaseResource>,
 }
 impl azure_core::Continuable for DataVersionBaseResourceArmPaginatedResult {
@@ -3413,7 +3498,11 @@ pub struct DatastoreResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type Datastore."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatastoreResource>,
 }
 impl azure_core::Continuable for DatastoreResourceArmPaginatedResult {
@@ -3610,23 +3699,68 @@ pub mod diagnose_response_result {
     use super::*;
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Value {
-        #[serde(rename = "userDefinedRouteResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "userDefinedRouteResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub user_defined_route_results: Vec<DiagnoseResult>,
-        #[serde(rename = "networkSecurityRuleResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "networkSecurityRuleResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub network_security_rule_results: Vec<DiagnoseResult>,
-        #[serde(rename = "resourceLockResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceLockResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_lock_results: Vec<DiagnoseResult>,
-        #[serde(rename = "dnsResolutionResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "dnsResolutionResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub dns_resolution_results: Vec<DiagnoseResult>,
-        #[serde(rename = "storageAccountResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "storageAccountResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub storage_account_results: Vec<DiagnoseResult>,
-        #[serde(rename = "keyVaultResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "keyVaultResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub key_vault_results: Vec<DiagnoseResult>,
-        #[serde(rename = "containerRegistryResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "containerRegistryResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub container_registry_results: Vec<DiagnoseResult>,
-        #[serde(rename = "applicationInsightsResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "applicationInsightsResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub application_insights_results: Vec<DiagnoseResult>,
-        #[serde(rename = "otherResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "otherResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub other_results: Vec<DiagnoseResult>,
     }
     impl Value {
@@ -4150,7 +4284,11 @@ pub struct EnvironmentContainerResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type EnvironmentContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnvironmentContainerResource>,
 }
 impl azure_core::Continuable for EnvironmentContainerResourceArmPaginatedResult {
@@ -4252,7 +4390,11 @@ pub struct EnvironmentVersionResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type EnvironmentVersion."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnvironmentVersionResource>,
 }
 impl azure_core::Continuable for EnvironmentVersionResourceArmPaginatedResult {
@@ -4294,10 +4436,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -4525,7 +4676,11 @@ pub mod estimated_vm_prices {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExternalFqdnResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FqdnEndpoints>,
 }
 impl ExternalFqdnResponse {
@@ -4537,7 +4692,12 @@ impl ExternalFqdnResponse {
 pub struct FqdnEndpoint {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<FqdnEndpointDetail>,
 }
 impl FqdnEndpoint {
@@ -4569,7 +4729,11 @@ impl FqdnEndpoints {
 pub struct FqdnEndpointsProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<FqdnEndpoint>,
 }
 impl FqdnEndpointsProperties {
@@ -4930,7 +5094,11 @@ pub struct JobBaseResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type JobBase."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobBaseResource>,
 }
 impl azure_core::Continuable for JobBaseResourceArmPaginatedResult {
@@ -5382,7 +5550,11 @@ impl KubernetesSchema {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListAmlUserFeatureResult {
     #[doc = "The list of AML user facing features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AmlUserFeature>,
     #[doc = "The URI to fetch the next page of AML user features information. Call ListNext() with this to fetch the next page of AML user features information."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5425,7 +5597,11 @@ impl ListStorageAccountKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListUsagesResult {
     #[doc = "The list of AML resource usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "The URI to fetch the next page of AML resource usage information. Call ListNext() with this to fetch the next page of AML resource usage information."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5502,7 +5678,11 @@ impl ListWorkspaceKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListWorkspaceQuotas {
     #[doc = "The list of Workspace Quotas by VM Family"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceQuota>,
     #[doc = "The URI to fetch the next page of workspace quota information by VM Family. Call ListNext() with this to fetch the next page of Workspace Quota information."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5568,7 +5748,12 @@ pub struct MlTableData {
     #[serde(flatten)]
     pub data_version_base: DataVersionBase,
     #[doc = "Uris referenced in the MLTable definition (required for lineage)"]
-    #[serde(rename = "referencedUris", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "referencedUris",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub referenced_uris: Vec<String>,
 }
 impl MlTableData {
@@ -5773,7 +5958,11 @@ pub struct ModelContainerResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type ModelContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ModelContainerResource>,
 }
 impl azure_core::Continuable for ModelContainerResourceArmPaginatedResult {
@@ -5833,7 +6022,11 @@ pub struct ModelVersionResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type ModelVersion."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ModelVersionResource>,
 }
 impl azure_core::Continuable for ModelVersionResourceArmPaginatedResult {
@@ -6064,7 +6257,11 @@ pub struct OnlineDeploymentTrackedResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type OnlineDeployment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OnlineDeploymentTrackedResource>,
 }
 impl azure_core::Continuable for OnlineDeploymentTrackedResourceArmPaginatedResult {
@@ -6137,7 +6334,11 @@ pub struct OnlineEndpointTrackedResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type OnlineEndpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OnlineEndpointTrackedResource>,
 }
 impl azure_core::Continuable for OnlineEndpointTrackedResourceArmPaginatedResult {
@@ -6334,7 +6535,11 @@ impl PatAuthTypeWorkspaceConnectionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PaginatedComputeResourcesList {
     #[doc = "An array of Machine Learning compute objects wrapped in ARM resource envelope."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputeResource>,
     #[doc = "A continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6562,7 +6767,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -6712,7 +6921,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -6727,10 +6940,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -6860,7 +7083,11 @@ pub mod quota_base_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaUpdateParameters {
     #[doc = "The list for update quota."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaBaseProperties>,
     #[doc = "Region of workspace quota to be updated."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6987,7 +7214,11 @@ pub struct RegistryListCredentialsResult {
     pub location: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub username: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<Password>,
 }
 impl RegistryListCredentialsResult {
@@ -7713,7 +7944,11 @@ pub struct SkuResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type SkuResource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuResource>,
 }
 impl azure_core::Continuable for SkuResourceArmPaginatedResult {
@@ -8271,7 +8506,11 @@ pub mod update_workspace_quotas {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UpdateWorkspaceQuotasResult {
     #[doc = "The list of workspace quota update result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UpdateWorkspaceQuotas>,
     #[doc = "The URI to fetch the next page of workspace quota update result. Call ListNext() with this to fetch the next page of Workspace Quota update result."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8645,7 +8884,12 @@ pub struct VirtualMachineSize {
     #[serde(rename = "estimatedVMPrices", default, skip_serializing_if = "Option::is_none")]
     pub estimated_vm_prices: Option<EstimatedVmPrices>,
     #[doc = "Specifies the compute types supported by the virtual machine size."]
-    #[serde(rename = "supportedComputeTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedComputeTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_compute_types: Vec<String>,
 }
 impl VirtualMachineSize {
@@ -8657,7 +8901,11 @@ impl VirtualMachineSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineSizeListResult {
     #[doc = "The list of virtual machine sizes supported by AmlCompute."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineSize>,
 }
 impl VirtualMachineSizeListResult {
@@ -8817,7 +9065,11 @@ impl WorkspaceConnectionPropertiesV2BasicResource {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceConnectionPropertiesV2BasicResourceArmPaginatedResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkspaceConnectionPropertiesV2BasicResource>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -8859,7 +9111,11 @@ impl WorkspaceConnectionUsernamePassword {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "The list of machine learning workspaces. Since this list may be incomplete, the nextLink field should be used to request the next list of machine learning workspaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
     #[doc = "The URI that can be used to request the next list of machine learning workspaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8927,10 +9183,20 @@ pub struct WorkspaceProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<workspace_properties::PublicNetworkAccess>,
     #[doc = "The list of private endpoint connections in the workspace."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources in this workspace."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
     #[serde(rename = "notebookInfo", default, skip_serializing_if = "Option::is_none")]
     pub notebook_info: Option<NotebookResourceInfo>,
diff --git a/services/mgmt/machinelearningservices/src/package_preview_2020_05/models.rs b/services/mgmt/machinelearningservices/src/package_preview_2020_05/models.rs
index da31b8096c..6c3100da60 100644
--- a/services/mgmt/machinelearningservices/src/package_preview_2020_05/models.rs
+++ b/services/mgmt/machinelearningservices/src/package_preview_2020_05/models.rs
@@ -107,7 +107,11 @@ pub struct AciServiceResponse {
     #[serde(rename = "modelConfigMap", default, skip_serializing_if = "Option::is_none")]
     pub model_config_map: Option<serde_json::Value>,
     #[doc = "The list of models."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub models: Vec<Model>,
     #[doc = "The Environment, models and assets used for inferencing."]
     #[serde(rename = "environmentImageRequest", default, skip_serializing_if = "Option::is_none")]
@@ -167,7 +171,12 @@ pub mod aks {
         #[serde(rename = "clusterFqdn", default, skip_serializing_if = "Option::is_none")]
         pub cluster_fqdn: Option<String>,
         #[doc = "System services"]
-        #[serde(rename = "systemServices", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "systemServices",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub system_services: Vec<SystemService>,
         #[doc = "Number of agents"]
         #[serde(rename = "agentCount", default, skip_serializing_if = "Option::is_none")]
@@ -279,7 +288,11 @@ pub struct AksServiceResponse {
     #[serde(flatten)]
     pub aks_variant_response: AksVariantResponse,
     #[doc = "The list of models."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub models: Vec<Model>,
     #[doc = "The resource requirements for the container (cpu and memory)."]
     #[serde(rename = "containerResourceRequirements", default, skip_serializing_if = "Option::is_none")]
@@ -526,7 +539,11 @@ pub mod aml_compute {
         #[serde(rename = "allocationStateTransitionTime", default, with = "azure_core::date::rfc3339::option")]
         pub allocation_state_transition_time: Option<time::OffsetDateTime>,
         #[doc = "Collection of errors encountered by various compute nodes during node setup."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub errors: Vec<MachineLearningServiceError>,
         #[doc = "The number of compute nodes currently assigned to the compute."]
         #[serde(rename = "currentNodeCount", default, skip_serializing_if = "Option::is_none")]
@@ -792,7 +809,11 @@ pub struct AmlComputeNodesInformation {
     #[serde(flatten)]
     pub compute_nodes_information: ComputeNodesInformation,
     #[doc = "The collection of returned AmlCompute nodes details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<AmlComputeNodeInformation>,
 }
 impl AmlComputeNodesInformation {
@@ -908,7 +929,12 @@ pub struct Compute {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Errors during provisioning"]
-    #[serde(rename = "provisioningErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisioningErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provisioning_errors: Vec<MachineLearningServiceError>,
     #[doc = "Indicating whether the compute was provisioned by user and brought from outside if true, or machine learning service provisioned it if false."]
     #[serde(rename = "isAttachedCompute", default, skip_serializing_if = "Option::is_none")]
@@ -1442,13 +1468,26 @@ pub struct EnvironmentImageRequest {
     #[serde(rename = "driverProgram", default, skip_serializing_if = "Option::is_none")]
     pub driver_program: Option<String>,
     #[doc = "The list of assets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assets: Vec<ImageAsset>,
     #[doc = "The list of model Ids."]
-    #[serde(rename = "modelIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "modelIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub model_ids: Vec<String>,
     #[doc = "The list of models."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub models: Vec<Model>,
     #[doc = "The details of the AZURE ML environment."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1469,13 +1508,26 @@ pub struct EnvironmentImageResponse {
     #[serde(rename = "driverProgram", default, skip_serializing_if = "Option::is_none")]
     pub driver_program: Option<String>,
     #[doc = "The list of assets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assets: Vec<ImageAsset>,
     #[doc = "The list of model Ids."]
-    #[serde(rename = "modelIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "modelIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub model_ids: Vec<String>,
     #[doc = "The list of models."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub models: Vec<Model>,
     #[doc = "The details of the AZURE ML environment."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1526,7 +1578,11 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "An array of error detail objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
 }
 impl ErrorResponse {
@@ -1897,7 +1953,11 @@ impl LinkedWorkspaceProps {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListAmlUserFeatureResult {
     #[doc = "The list of AML user facing features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AmlUserFeature>,
     #[doc = "The URI to fetch the next page of AML user features information. Call ListNext() with this to fetch the next page of AML user features information."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1918,7 +1978,11 @@ impl ListAmlUserFeatureResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListUsagesResult {
     #[doc = "The list of AML resource usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "The URI to fetch the next page of AML resource usage information. Call ListNext() with this to fetch the next page of AML resource usage information."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1955,7 +2019,11 @@ impl ListWorkspaceKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListWorkspaceQuotas {
     #[doc = "The list of Workspace Quotas by VM Family"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceQuota>,
     #[doc = "The URI to fetch the next page of workspace quota information by VM Family. Call ListNext() with this to fetch the next page of Workspace Quota information."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2032,7 +2100,11 @@ pub struct Model {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<i64>,
     #[doc = "The list of datasets associated with the model."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datasets: Vec<DatasetReference>,
     #[doc = "The URL of the Model. Usually a SAS URL."]
     pub url: String,
@@ -2067,7 +2139,12 @@ pub struct Model {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<serde_json::Value>,
     #[doc = "Models derived from this model"]
-    #[serde(rename = "derivedModelIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "derivedModelIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub derived_model_ids: Vec<String>,
     #[doc = "Sample Input Data for the Model. A reference to a dataset in the workspace in the format aml://dataset/{datasetId}"]
     #[serde(rename = "sampleInputData", default, skip_serializing_if = "Option::is_none")]
@@ -2241,10 +2318,18 @@ impl ModelPythonSection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ModelSparkSection {
     #[doc = "The list of spark repositories."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub repositories: Vec<String>,
     #[doc = "The Spark packages to use."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub packages: Vec<SparkMavenPackage>,
     #[doc = "Whether to precache the packages."]
     #[serde(rename = "precachePackages", default, skip_serializing_if = "Option::is_none")]
@@ -2325,7 +2410,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of AML workspace operations supported by the AML workspace resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -2343,7 +2432,11 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PaginatedComputeResourcesList {
     #[doc = "An array of Machine Learning compute objects wrapped in ARM resource envelope."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputeResource>,
     #[doc = "A continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2364,7 +2457,11 @@ impl PaginatedComputeResourcesList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PaginatedServiceList {
     #[doc = "An array of Machine Learning compute objects wrapped in ARM resource envelope."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResource>,
     #[doc = "A continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2543,7 +2640,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -2558,10 +2659,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -2650,7 +2761,11 @@ pub mod quota_base_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaUpdateParameters {
     #[doc = "The list for update quota."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaBaseProperties>,
 }
 impl QuotaUpdateParameters {
@@ -2712,16 +2827,36 @@ pub struct RSection {
     #[serde(rename = "snapshotDate", default, skip_serializing_if = "Option::is_none")]
     pub snapshot_date: Option<String>,
     #[doc = "The CRAN packages to use."]
-    #[serde(rename = "cranPackages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cranPackages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cran_packages: Vec<RCranPackage>,
     #[doc = "The packages directly from GitHub."]
-    #[serde(rename = "gitHubPackages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gitHubPackages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub git_hub_packages: Vec<RGitHubPackage>,
     #[doc = "The packages from custom urls."]
-    #[serde(rename = "customUrlPackages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customUrlPackages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_url_packages: Vec<String>,
     #[doc = "The packages from Bioconductor."]
-    #[serde(rename = "bioConductorPackages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bioConductorPackages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bio_conductor_packages: Vec<String>,
 }
 impl RSection {
@@ -2744,16 +2879,36 @@ pub struct RSectionResponse {
     #[serde(rename = "snapshotDate", default, skip_serializing_if = "Option::is_none")]
     pub snapshot_date: Option<String>,
     #[doc = "The CRAN packages to use."]
-    #[serde(rename = "cranPackages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cranPackages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cran_packages: Vec<RCranPackage>,
     #[doc = "The packages directly from GitHub."]
-    #[serde(rename = "gitHubPackages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gitHubPackages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub git_hub_packages: Vec<RGitHubPackageResponse>,
     #[doc = "The packages from custom urls."]
-    #[serde(rename = "customUrlPackages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customUrlPackages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_url_packages: Vec<String>,
     #[doc = "The packages from Bioconductor."]
-    #[serde(rename = "bioConductorPackages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bioConductorPackages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bio_conductor_packages: Vec<String>,
 }
 impl RSectionResponse {
@@ -2767,7 +2922,11 @@ pub struct RegistryListCredentialsResult {
     pub location: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub username: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<Password>,
 }
 impl RegistryListCredentialsResult {
@@ -2899,10 +3058,19 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "List of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ResourceSkuZoneDetails>,
 }
 impl ResourceSkuLocationInfo {
@@ -2914,10 +3082,18 @@ impl ResourceSkuLocationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuZoneDetails {
     #[doc = "The set of zones that the SKU is available in with the specified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
     #[doc = "A list of capabilities that are available for the SKU in the specified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl ResourceSkuZoneDetails {
@@ -2932,7 +3108,11 @@ pub struct Restriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for the restriction."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -3267,7 +3447,11 @@ impl Sku {
 #[doc = "List of skus with features"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkspaceSku>,
     #[doc = "The URI to fetch the next page of Workspace Skus. Call ListNext() with this URI to fetch the next page of Workspace Skus"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3466,7 +3650,11 @@ pub mod update_workspace_quotas {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UpdateWorkspaceQuotasResult {
     #[doc = "The list of workspace quota update result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UpdateWorkspaceQuotas>,
     #[doc = "The URI to fetch the next page of workspace quota update result. Call ListNext() with this to fetch the next page of Workspace Quota update result."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3712,7 +3900,12 @@ impl VirtualMachineSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineSizeListResult {
     #[doc = "The list of virtual machine sizes supported by AmlCompute."]
-    #[serde(rename = "amlCompute", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "amlCompute",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aml_compute: Vec<VirtualMachineSize>,
 }
 impl VirtualMachineSizeListResult {
@@ -3773,7 +3966,11 @@ impl Workspace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "The list of machine learning workspaces. Since this list may be incomplete, the nextLink field should be used to request the next list of machine learning workspaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
     #[doc = "The URI that can be used to request the next list of machine learning workspaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3841,10 +4038,20 @@ pub struct WorkspaceProperties {
     #[serde(rename = "allowPublicAccessWhenBehindVnet", default, skip_serializing_if = "Option::is_none")]
     pub allow_public_access_when_behind_vnet: Option<bool>,
     #[doc = "The list of private endpoint connections in the workspace."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources in this workspace."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
 }
 impl WorkspaceProperties {
@@ -3921,10 +4128,19 @@ impl WorkspacePropertiesUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceSku {
     #[doc = "The set of locations that the SKU is available. This will be supported and registered Azure Geo Regions (e.g. West US, East US, Southeast Asia, etc.)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "A list of locations and availability zones in those locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "Sku Tier like Basic or Enterprise"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3934,10 +4150,18 @@ pub struct WorkspaceSku {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of features/user capabilities associated with the sku"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<Restriction>,
 }
 impl WorkspaceSku {
diff --git a/services/mgmt/machinelearningservices/src/package_preview_2022_06/models.rs b/services/mgmt/machinelearningservices/src/package_preview_2022_06/models.rs
index bb38eb8625..40cf8513ff 100644
--- a/services/mgmt/machinelearningservices/src/package_preview_2022_06/models.rs
+++ b/services/mgmt/machinelearningservices/src/package_preview_2022_06/models.rs
@@ -39,7 +39,12 @@ pub mod aks_schema {
         #[serde(rename = "clusterFqdn", default, skip_serializing_if = "Option::is_none")]
         pub cluster_fqdn: Option<String>,
         #[doc = "System services"]
-        #[serde(rename = "systemServices", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "systemServices",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub system_services: Vec<SystemService>,
         #[doc = "Number of agents"]
         #[serde(rename = "agentCount", default, skip_serializing_if = "Option::is_none")]
@@ -347,7 +352,11 @@ pub mod aml_compute_node_information {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AmlComputeNodesInformation {
     #[doc = "The collection of returned AmlCompute nodes details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<AmlComputeNodeInformation>,
     #[doc = "The continuation token."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -401,7 +410,11 @@ pub struct AmlComputeProperties {
     #[serde(rename = "allocationStateTransitionTime", default, with = "azure_core::date::rfc3339::option")]
     pub allocation_state_transition_time: Option<time::OffsetDateTime>,
     #[doc = "Collection of errors encountered by various compute nodes during node setup."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ErrorResponse>,
     #[doc = "The number of compute nodes currently assigned to the compute."]
     #[serde(rename = "currentNodeCount", default, skip_serializing_if = "Option::is_none")]
@@ -645,7 +658,11 @@ pub mod aml_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AmlOperationListResult {
     #[doc = "List of AML workspace operations supported by the AML workspace resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AmlOperation>,
 }
 impl azure_core::Continuable for AmlOperationListResult {
@@ -1159,7 +1176,11 @@ pub struct BatchDeploymentTrackedResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type BatchDeployment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BatchDeploymentTrackedResource>,
 }
 impl azure_core::Continuable for BatchDeploymentTrackedResourceArmPaginatedResult {
@@ -1240,7 +1261,11 @@ pub struct BatchEndpointTrackedResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type BatchEndpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BatchEndpointTrackedResource>,
 }
 impl azure_core::Continuable for BatchEndpointTrackedResourceArmPaginatedResult {
@@ -1700,10 +1725,20 @@ pub struct ClassificationTrainingSettings {
     #[serde(flatten)]
     pub training_settings: TrainingSettings,
     #[doc = "Allowed models for classification task."]
-    #[serde(rename = "allowedTrainingAlgorithms", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedTrainingAlgorithms",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_training_algorithms: Vec<ClassificationModels>,
     #[doc = "Blocked models for classification task."]
-    #[serde(rename = "blockedTrainingAlgorithms", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockedTrainingAlgorithms",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocked_training_algorithms: Vec<ClassificationModels>,
 }
 impl ClassificationTrainingSettings {
@@ -1807,7 +1842,11 @@ pub struct CodeContainerResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type CodeContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CodeContainerResource>,
 }
 impl azure_core::Continuable for CodeContainerResourceArmPaginatedResult {
@@ -1858,7 +1897,11 @@ pub struct CodeVersionResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type CodeVersion."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CodeVersionResource>,
 }
 impl azure_core::Continuable for CodeVersionResourceArmPaginatedResult {
@@ -1876,7 +1919,11 @@ impl CodeVersionResourceArmPaginatedResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ColumnTransformer {
     #[doc = "Fields to apply transformer logic on."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fields: Vec<String>,
     #[doc = "Different properties to be passed to transformer.\r\nInput expected is dictionary of key,value pairs in JSON format."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1983,7 +2030,11 @@ pub struct ComponentContainerResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type ComponentContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComponentContainerResource>,
 }
 impl azure_core::Continuable for ComponentContainerResourceArmPaginatedResult {
@@ -2034,7 +2085,11 @@ pub struct ComponentVersionResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type ComponentVersion."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComponentVersionResource>,
 }
 impl azure_core::Continuable for ComponentVersionResourceArmPaginatedResult {
@@ -2073,7 +2128,12 @@ pub struct Compute {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "Errors during provisioning"]
-    #[serde(rename = "provisioningErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisioningErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provisioning_errors: Vec<ErrorResponse>,
     #[doc = "Indicating whether the compute was provisioned by user and brought from outside if true, or machine learning service provisioned it if false."]
     #[serde(rename = "isAttachedCompute", default, skip_serializing_if = "Option::is_none")]
@@ -2213,7 +2273,11 @@ pub struct ComputeInstanceContainer {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub environment: Option<ComputeInstanceEnvironmentInfo>,
     #[doc = "services of this containers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub services: Vec<serde_json::Value>,
 }
 impl ComputeInstanceContainer {
@@ -2774,19 +2838,32 @@ pub struct ComputeInstanceProperties {
     #[serde(rename = "sshSettings", default, skip_serializing_if = "Option::is_none")]
     pub ssh_settings: Option<ComputeInstanceSshSettings>,
     #[doc = "List of Custom Services added to the compute."]
-    #[serde(rename = "customServices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customServices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_services: Vec<CustomService>,
     #[doc = "Defines all connectivity endpoints and properties for an ComputeInstance."]
     #[serde(rename = "connectivityEndpoints", default, skip_serializing_if = "Option::is_none")]
     pub connectivity_endpoints: Option<ComputeInstanceConnectivityEndpoints>,
     #[doc = "Describes available applications and their endpoints on this ComputeInstance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applications: Vec<ComputeInstanceApplication>,
     #[doc = "Describes information on user who created this ComputeInstance."]
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
     pub created_by: Option<ComputeInstanceCreatedBy>,
     #[doc = "Collection of errors encountered on this ComputeInstance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ErrorResponse>,
     #[doc = "Current state of an ComputeInstance."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2813,13 +2890,27 @@ pub struct ComputeInstanceProperties {
     #[serde(rename = "enableNodePublicIp", default, skip_serializing_if = "Option::is_none")]
     pub enable_node_public_ip: Option<bool>,
     #[doc = "Describes informations of containers on this ComputeInstance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub containers: Vec<ComputeInstanceContainer>,
     #[doc = "Describes informations of dataDisks on this ComputeInstance."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<ComputeInstanceDataDisk>,
     #[doc = "Describes informations of dataMounts on this ComputeInstance."]
-    #[serde(rename = "dataMounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataMounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_mounts: Vec<ComputeInstanceDataMount>,
     #[doc = "Version of computeInstance."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3146,7 +3237,12 @@ impl ComputeResourceSchema {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeSchedules {
     #[doc = "The list of compute start stop schedules to be applied."]
-    #[serde(rename = "computeStartStop", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "computeStartStop",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub compute_start_stop: Vec<ComputeStartStopSchedule>,
 }
 impl ComputeSchedules {
@@ -3608,10 +3704,18 @@ pub struct CustomService {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub docker: Option<Docker>,
     #[doc = "Configuring the endpoints for the container"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<Endpoint>,
     #[doc = "Configuring the volumes for the container"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volumes: Vec<VolumeDefinition>,
 }
 impl CustomService {
@@ -3686,7 +3790,11 @@ pub struct DataContainerResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type DataContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataContainerResource>,
 }
 impl azure_core::Continuable for DataContainerResourceArmPaginatedResult {
@@ -3858,7 +3966,11 @@ pub struct DataVersionBaseResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type DataVersionBase."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataVersionBaseResource>,
 }
 impl azure_core::Continuable for DataVersionBaseResourceArmPaginatedResult {
@@ -4017,7 +4129,11 @@ pub struct DatastoreResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type Datastore."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatastoreResource>,
 }
 impl azure_core::Continuable for DatastoreResourceArmPaginatedResult {
@@ -4226,23 +4342,68 @@ pub mod diagnose_response_result {
     use super::*;
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Value {
-        #[serde(rename = "userDefinedRouteResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "userDefinedRouteResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub user_defined_route_results: Vec<DiagnoseResult>,
-        #[serde(rename = "networkSecurityRuleResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "networkSecurityRuleResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub network_security_rule_results: Vec<DiagnoseResult>,
-        #[serde(rename = "resourceLockResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceLockResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_lock_results: Vec<DiagnoseResult>,
-        #[serde(rename = "dnsResolutionResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "dnsResolutionResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub dns_resolution_results: Vec<DiagnoseResult>,
-        #[serde(rename = "storageAccountResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "storageAccountResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub storage_account_results: Vec<DiagnoseResult>,
-        #[serde(rename = "keyVaultResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "keyVaultResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub key_vault_results: Vec<DiagnoseResult>,
-        #[serde(rename = "containerRegistryResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "containerRegistryResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub container_registry_results: Vec<DiagnoseResult>,
-        #[serde(rename = "applicationInsightsResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "applicationInsightsResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub application_insights_results: Vec<DiagnoseResult>,
-        #[serde(rename = "otherResults", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "otherResults",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub other_results: Vec<DiagnoseResult>,
     }
     impl Value {
@@ -4924,7 +5085,11 @@ pub struct EnvironmentContainerResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type EnvironmentContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnvironmentContainerResource>,
 }
 impl azure_core::Continuable for EnvironmentContainerResourceArmPaginatedResult {
@@ -5084,7 +5249,11 @@ pub struct EnvironmentVersionResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type EnvironmentVersion."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnvironmentVersionResource>,
 }
 impl azure_core::Continuable for EnvironmentVersionResourceArmPaginatedResult {
@@ -5126,10 +5295,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -5425,7 +5603,11 @@ impl ExportSummary {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExternalFqdnResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FqdnEndpoints>,
 }
 impl ExternalFqdnResponse {
@@ -5437,7 +5619,12 @@ impl ExternalFqdnResponse {
 pub struct FqdnEndpoint {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<FqdnEndpointDetail>,
 }
 impl FqdnEndpoint {
@@ -5469,7 +5656,11 @@ impl FqdnEndpoints {
 pub struct FqdnEndpointsProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<FqdnEndpoint>,
 }
 impl FqdnEndpointsProperties {
@@ -5810,7 +6001,12 @@ pub struct ForecastingSettings {
     #[serde(rename = "timeColumnName", default, skip_serializing_if = "Option::is_none")]
     pub time_column_name: Option<String>,
     #[doc = "The names of columns used to group a timeseries. It can be used to create multiple series.\r\nIf grain is not defined, the data set is assumed to be one time-series. This parameter is used with task type forecasting."]
-    #[serde(rename = "timeSeriesIdColumnNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeSeriesIdColumnNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_series_id_column_names: Vec<String>,
     #[doc = "Configure STL Decomposition of the time-series target column."]
     #[serde(rename = "useStl", default, skip_serializing_if = "Option::is_none")]
@@ -5827,10 +6023,20 @@ pub struct ForecastingTrainingSettings {
     #[serde(flatten)]
     pub training_settings: TrainingSettings,
     #[doc = "Allowed models for forecasting task."]
-    #[serde(rename = "allowedTrainingAlgorithms", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedTrainingAlgorithms",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_training_algorithms: Vec<ForecastingModels>,
     #[doc = "Blocked models for forecasting task."]
-    #[serde(rename = "blockedTrainingAlgorithms", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockedTrainingAlgorithms",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocked_training_algorithms: Vec<ForecastingModels>,
 }
 impl ForecastingTrainingSettings {
@@ -6176,7 +6382,12 @@ pub struct ImageClassificationBase {
     #[serde(rename = "modelSettings", default, skip_serializing_if = "Option::is_none")]
     pub model_settings: Option<ImageModelSettingsClassification>,
     #[doc = "Search space for sampling different combinations of models and their hyperparameters."]
-    #[serde(rename = "searchSpace", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchSpace",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_space: Vec<ImageModelDistributionSettingsClassification>,
 }
 impl ImageClassificationBase {
@@ -6617,7 +6828,12 @@ pub struct ImageObjectDetectionBase {
     #[serde(rename = "modelSettings", default, skip_serializing_if = "Option::is_none")]
     pub model_settings: Option<ImageModelSettingsObjectDetection>,
     #[doc = "Search space for sampling different combinations of models and their hyperparameters."]
-    #[serde(rename = "searchSpace", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "searchSpace",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub search_space: Vec<ImageModelDistributionSettingsObjectDetection>,
 }
 impl ImageObjectDetectionBase {
@@ -6898,7 +7114,11 @@ pub struct JobBaseResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type JobBase."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobBaseResource>,
 }
 impl azure_core::Continuable for JobBaseResourceArmPaginatedResult {
@@ -7604,7 +7824,12 @@ pub struct LabelingJob {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<JobProvisioningState>,
     #[doc = "Status messages of the job."]
-    #[serde(rename = "statusMessages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusMessages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_messages: Vec<StatusMessage>,
 }
 impl LabelingJob {
@@ -7688,7 +7913,11 @@ pub struct LabelingJobResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type LabelingJob."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LabelingJobResource>,
 }
 impl azure_core::Continuable for LabelingJobResourceArmPaginatedResult {
@@ -7762,7 +7991,11 @@ impl Serialize for LearningRateScheduler {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListAmlUserFeatureResult {
     #[doc = "The list of AML user facing features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AmlUserFeature>,
     #[doc = "The URI to fetch the next page of AML user features information. Call ListNext() with this to fetch the next page of AML user features information."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7805,7 +8038,11 @@ impl ListStorageAccountKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListUsagesResult {
     #[doc = "The list of AML resource usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "The URI to fetch the next page of AML resource usage information. Call ListNext() with this to fetch the next page of AML resource usage information."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7882,7 +8119,11 @@ impl ListWorkspaceKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListWorkspaceQuotas {
     #[doc = "The list of Workspace Quotas by VM Family"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceQuota>,
     #[doc = "The URI to fetch the next page of workspace quota information by VM Family. Call ListNext() with this to fetch the next page of Workspace Quota information."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8076,7 +8317,12 @@ pub struct MlTableData {
     #[serde(flatten)]
     pub data_version_base: DataVersionBase,
     #[doc = "Uris referenced in the MLTable definition (required for lineage)"]
-    #[serde(rename = "referencedUris", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "referencedUris",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub referenced_uris: Vec<String>,
 }
 impl MlTableData {
@@ -8318,7 +8564,11 @@ pub struct ModelContainerResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type ModelContainer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ModelContainerResource>,
 }
 impl azure_core::Continuable for ModelContainerResourceArmPaginatedResult {
@@ -8421,7 +8671,11 @@ pub struct ModelVersionResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type ModelVersion."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ModelVersionResource>,
 }
 impl azure_core::Continuable for ModelVersionResourceArmPaginatedResult {
@@ -8783,7 +9037,11 @@ pub struct OnlineDeploymentTrackedResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type OnlineDeployment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OnlineDeploymentTrackedResource>,
 }
 impl azure_core::Continuable for OnlineDeploymentTrackedResourceArmPaginatedResult {
@@ -8864,7 +9122,11 @@ pub struct OnlineEndpointTrackedResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type OnlineEndpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OnlineEndpointTrackedResource>,
 }
 impl azure_core::Continuable for OnlineEndpointTrackedResourceArmPaginatedResult {
@@ -9063,7 +9325,11 @@ impl PatAuthTypeWorkspaceConnectionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PaginatedComputeResourcesList {
     #[doc = "An array of Machine Learning compute objects wrapped in ARM resource envelope."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputeResource>,
     #[doc = "A continuation link (absolute URI) to the next page of results in the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9295,7 +9561,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -9445,7 +9715,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -9460,10 +9734,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -9651,7 +9935,11 @@ pub mod quota_base_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaUpdateParameters {
     #[doc = "The list for update quota."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaBaseProperties>,
     #[doc = "Region of workspace quota to be updated."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -9770,7 +10058,12 @@ pub struct RecurrenceSchedule {
     #[doc = "[Required] List of minutes for the schedule."]
     pub minutes: Vec<i32>,
     #[doc = "List of days for the schedule."]
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<WeekDay>,
 }
 impl RecurrenceSchedule {
@@ -9860,7 +10153,11 @@ pub struct RegistryListCredentialsResult {
     pub location: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub username: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub passwords: Vec<Password>,
 }
 impl RegistryListCredentialsResult {
@@ -10000,10 +10297,20 @@ pub struct RegressionTrainingSettings {
     #[serde(flatten)]
     pub training_settings: TrainingSettings,
     #[doc = "Allowed models for regression task."]
-    #[serde(rename = "allowedTrainingAlgorithms", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedTrainingAlgorithms",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_training_algorithms: Vec<RegressionModels>,
     #[doc = "Blocked models for regression task."]
-    #[serde(rename = "blockedTrainingAlgorithms", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockedTrainingAlgorithms",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocked_training_algorithms: Vec<RegressionModels>,
 }
 impl RegressionTrainingSettings {
@@ -10529,7 +10836,11 @@ pub struct ScheduleResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type Schedule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScheduleResource>,
 }
 impl azure_core::Continuable for ScheduleResourceArmPaginatedResult {
@@ -10977,7 +11288,11 @@ pub struct SkuResourceArmPaginatedResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "An array of objects of type SkuResource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuResource>,
 }
 impl azure_core::Continuable for SkuResourceArmPaginatedResult {
@@ -11058,7 +11373,11 @@ pub struct SparkJob {
     #[serde(flatten)]
     pub job_base: JobBase,
     #[doc = "Archive files used in the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub archives: Vec<String>,
     #[doc = "Arguments for the job."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11075,19 +11394,32 @@ pub struct SparkJob {
     #[serde(rename = "environmentId", default, skip_serializing_if = "Option::is_none")]
     pub environment_id: Option<String>,
     #[doc = "Files used in the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<String>,
     #[doc = "Mapping of input data bindings used in the job."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub inputs: Option<serde_json::Value>,
     #[doc = "Jar files used in the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jars: Vec<String>,
     #[doc = "Mapping of output data bindings used in the job."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub outputs: Option<serde_json::Value>,
     #[doc = "Python files used in the job."]
-    #[serde(rename = "pyFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pyFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub py_files: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub resources: Option<SparkResourceConfiguration>,
@@ -11589,7 +11921,12 @@ impl SystemService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TableVertical {
     #[doc = "Columns to use for CVSplit data."]
-    #[serde(rename = "cvSplitColumnNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cvSplitColumnNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cv_split_column_names: Vec<String>,
     #[doc = "Featurization Configuration."]
     #[serde(rename = "featurizationSettings", default, skip_serializing_if = "Option::is_none")]
@@ -11625,7 +11962,12 @@ pub struct TableVerticalFeaturizationSettings {
     #[serde(flatten)]
     pub featurization_settings: FeaturizationSettings,
     #[doc = "These transformers shall not be used in featurization."]
-    #[serde(rename = "blockedTransformers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockedTransformers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocked_transformers: Vec<BlockedTransformers>,
     #[doc = "Dictionary of column name and its type (int, float, string, datetime etc)."]
     #[serde(rename = "columnNameAndTypes", default, skip_serializing_if = "Option::is_none")]
@@ -12334,7 +12676,11 @@ pub mod update_workspace_quotas {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UpdateWorkspaceQuotasResult {
     #[doc = "The list of workspace quota update result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UpdateWorkspaceQuotas>,
     #[doc = "The URI to fetch the next page of workspace quota update result. Call ListNext() with this to fetch the next page of Workspace Quota update result."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12788,7 +13134,12 @@ pub struct VirtualMachineSize {
     #[serde(rename = "estimatedVMPrices", default, skip_serializing_if = "Option::is_none")]
     pub estimated_vm_prices: Option<EstimatedVmPrices>,
     #[doc = "Specifies the compute types supported by the virtual machine size."]
-    #[serde(rename = "supportedComputeTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedComputeTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_compute_types: Vec<String>,
 }
 impl VirtualMachineSize {
@@ -12800,7 +13151,11 @@ impl VirtualMachineSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineSizeListResult {
     #[doc = "The list of virtual machine sizes supported by AmlCompute."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineSize>,
 }
 impl VirtualMachineSizeListResult {
@@ -13100,7 +13455,11 @@ impl WorkspaceConnectionPropertiesV2BasicResource {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceConnectionPropertiesV2BasicResourceArmPaginatedResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkspaceConnectionPropertiesV2BasicResource>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -13142,7 +13501,11 @@ impl WorkspaceConnectionUsernamePassword {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "The list of machine learning workspaces. Since this list may be incomplete, the nextLink field should be used to request the next list of machine learning workspaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
     #[doc = "The URI that can be used to request the next list of machine learning workspaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13210,10 +13573,20 @@ pub struct WorkspaceProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<workspace_properties::PublicNetworkAccess>,
     #[doc = "The list of private endpoint connections in the workspace."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources in this workspace."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
     #[serde(rename = "notebookInfo", default, skip_serializing_if = "Option::is_none")]
     pub notebook_info: Option<NotebookResourceInfo>,
diff --git a/services/mgmt/maintenance/src/package_2021_05/models.rs b/services/mgmt/maintenance/src/package_2021_05/models.rs
index 8f1cda8b14..57c5d2bedb 100644
--- a/services/mgmt/maintenance/src/package_2021_05/models.rs
+++ b/services/mgmt/maintenance/src/package_2021_05/models.rs
@@ -132,7 +132,11 @@ impl ErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListApplyUpdate {
     #[doc = "The list of apply updates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplyUpdate>,
 }
 impl azure_core::Continuable for ListApplyUpdate {
@@ -150,7 +154,11 @@ impl ListApplyUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListConfigurationAssignmentsResult {
     #[doc = "The list of configuration Assignments"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationAssignment>,
 }
 impl azure_core::Continuable for ListConfigurationAssignmentsResult {
@@ -168,7 +176,11 @@ impl ListConfigurationAssignmentsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListMaintenanceConfigurationsResult {
     #[doc = "The list of maintenance Configurations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MaintenanceConfiguration>,
 }
 impl azure_core::Continuable for ListMaintenanceConfigurationsResult {
@@ -186,7 +198,11 @@ impl ListMaintenanceConfigurationsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListUpdatesResult {
     #[doc = "The pending updates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Update>,
 }
 impl azure_core::Continuable for ListUpdatesResult {
@@ -423,7 +439,11 @@ impl OperationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "A collection of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationsListResult {
diff --git a/services/mgmt/maintenance/src/package_preview_2020_07/models.rs b/services/mgmt/maintenance/src/package_preview_2020_07/models.rs
index 2d5250eb83..217a61533e 100644
--- a/services/mgmt/maintenance/src/package_preview_2020_07/models.rs
+++ b/services/mgmt/maintenance/src/package_preview_2020_07/models.rs
@@ -132,7 +132,11 @@ impl ErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListConfigurationAssignmentsResult {
     #[doc = "The list of configuration Assignments"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationAssignment>,
 }
 impl azure_core::Continuable for ListConfigurationAssignmentsResult {
@@ -150,7 +154,11 @@ impl ListConfigurationAssignmentsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListMaintenanceConfigurationsResult {
     #[doc = "The list of maintenance Configurations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MaintenanceConfiguration>,
 }
 impl azure_core::Continuable for ListMaintenanceConfigurationsResult {
@@ -168,7 +176,11 @@ impl ListMaintenanceConfigurationsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListUpdatesResult {
     #[doc = "The pending updates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Update>,
 }
 impl azure_core::Continuable for ListUpdatesResult {
@@ -408,7 +420,11 @@ impl OperationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "A collection of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationsListResult {
diff --git a/services/mgmt/maintenance/src/package_preview_2021_04/models.rs b/services/mgmt/maintenance/src/package_preview_2021_04/models.rs
index 751cc69d00..340a766c05 100644
--- a/services/mgmt/maintenance/src/package_preview_2021_04/models.rs
+++ b/services/mgmt/maintenance/src/package_preview_2021_04/models.rs
@@ -132,13 +132,28 @@ impl ErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InputLinuxParameters {
     #[doc = "Package names to be excluded for patching."]
-    #[serde(rename = "packageNameMasksToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_exclude: Vec<String>,
     #[doc = "Package names to be included for patching."]
-    #[serde(rename = "packageNameMasksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_include: Vec<String>,
     #[doc = "Classification category of patches to be patched"]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
 }
 impl InputLinuxParameters {
@@ -213,13 +228,28 @@ pub mod input_patch_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InputWindowsParameters {
     #[doc = "Windows KBID to be excluded for patching."]
-    #[serde(rename = "kbNumbersToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_exclude: Vec<String>,
     #[doc = "Windows KBID to be included for patching."]
-    #[serde(rename = "kbNumbersToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_include: Vec<String>,
     #[doc = "Classification category of patches to be patched"]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
     #[doc = "Exclude patches which need reboot"]
     #[serde(rename = "excludeKbsRequiringReboot", default, skip_serializing_if = "Option::is_none")]
@@ -234,7 +264,11 @@ impl InputWindowsParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListApplyUpdate {
     #[doc = "The list of apply updates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplyUpdate>,
 }
 impl azure_core::Continuable for ListApplyUpdate {
@@ -252,7 +286,11 @@ impl ListApplyUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListConfigurationAssignmentsResult {
     #[doc = "The list of configuration Assignments"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationAssignment>,
 }
 impl azure_core::Continuable for ListConfigurationAssignmentsResult {
@@ -270,7 +308,11 @@ impl ListConfigurationAssignmentsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListMaintenanceConfigurationsResult {
     #[doc = "The list of maintenance Configurations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MaintenanceConfiguration>,
 }
 impl azure_core::Continuable for ListMaintenanceConfigurationsResult {
@@ -288,7 +330,11 @@ impl ListMaintenanceConfigurationsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListUpdatesResult {
     #[doc = "The pending updates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Update>,
 }
 impl azure_core::Continuable for ListUpdatesResult {
@@ -528,7 +574,11 @@ impl OperationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "A collection of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationsListResult {
@@ -741,10 +791,20 @@ impl UpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationTasks {
     #[doc = "List of pre tasks. e.g. [{'source' :'runbook', 'taskScope': 'Global', 'parameters': { 'arg1': 'value1'}}]"]
-    #[serde(rename = "preTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pre_tasks: Vec<TaskProperties>,
     #[doc = "List of post tasks. e.g. [{'source' :'runbook', 'taskScope': 'Resource', 'parameters': { 'arg1': 'value1'}}]"]
-    #[serde(rename = "postTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "postTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub post_tasks: Vec<TaskProperties>,
 }
 impl SoftwareUpdateConfigurationTasks {
diff --git a/services/mgmt/maintenance/src/package_preview_2021_09/models.rs b/services/mgmt/maintenance/src/package_preview_2021_09/models.rs
index 89354762a9..09d7af7c7a 100644
--- a/services/mgmt/maintenance/src/package_preview_2021_09/models.rs
+++ b/services/mgmt/maintenance/src/package_preview_2021_09/models.rs
@@ -132,13 +132,28 @@ impl ErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InputLinuxParameters {
     #[doc = "Package names to be excluded for patching."]
-    #[serde(rename = "packageNameMasksToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_exclude: Vec<String>,
     #[doc = "Package names to be included for patching."]
-    #[serde(rename = "packageNameMasksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_include: Vec<String>,
     #[doc = "Classification category of patches to be patched"]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
 }
 impl InputLinuxParameters {
@@ -218,13 +233,28 @@ pub mod input_patch_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InputWindowsParameters {
     #[doc = "Windows KBID to be excluded for patching."]
-    #[serde(rename = "kbNumbersToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_exclude: Vec<String>,
     #[doc = "Windows KBID to be included for patching."]
-    #[serde(rename = "kbNumbersToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_include: Vec<String>,
     #[doc = "Classification category of patches to be patched"]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
     #[doc = "Exclude patches which need reboot"]
     #[serde(rename = "excludeKbsRequiringReboot", default, skip_serializing_if = "Option::is_none")]
@@ -239,7 +269,11 @@ impl InputWindowsParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListApplyUpdate {
     #[doc = "The list of apply updates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplyUpdate>,
 }
 impl azure_core::Continuable for ListApplyUpdate {
@@ -257,7 +291,11 @@ impl ListApplyUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListConfigurationAssignmentsResult {
     #[doc = "The list of configuration Assignments"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationAssignment>,
 }
 impl azure_core::Continuable for ListConfigurationAssignmentsResult {
@@ -275,7 +313,11 @@ impl ListConfigurationAssignmentsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListMaintenanceConfigurationsResult {
     #[doc = "The list of maintenance Configurations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MaintenanceConfiguration>,
 }
 impl azure_core::Continuable for ListMaintenanceConfigurationsResult {
@@ -293,7 +335,11 @@ impl ListMaintenanceConfigurationsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListUpdatesResult {
     #[doc = "The pending updates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Update>,
 }
 impl azure_core::Continuable for ListUpdatesResult {
@@ -533,7 +579,11 @@ impl OperationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "A collection of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationsListResult {
@@ -746,10 +796,20 @@ impl UpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationTasks {
     #[doc = "List of pre tasks. e.g. [{'source' :'runbook', 'taskScope': 'Global', 'parameters': { 'arg1': 'value1'}}]"]
-    #[serde(rename = "preTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pre_tasks: Vec<TaskProperties>,
     #[doc = "List of post tasks. e.g. [{'source' :'runbook', 'taskScope': 'Resource', 'parameters': { 'arg1': 'value1'}}]"]
-    #[serde(rename = "postTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "postTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub post_tasks: Vec<TaskProperties>,
 }
 impl SoftwareUpdateConfigurationTasks {
diff --git a/services/mgmt/maintenance/src/package_preview_2022_07/models.rs b/services/mgmt/maintenance/src/package_preview_2022_07/models.rs
index c2b7a84944..acc342fe37 100644
--- a/services/mgmt/maintenance/src/package_preview_2022_07/models.rs
+++ b/services/mgmt/maintenance/src/package_preview_2022_07/models.rs
@@ -132,13 +132,28 @@ impl ErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InputLinuxParameters {
     #[doc = "Package names to be excluded for patching."]
-    #[serde(rename = "packageNameMasksToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_exclude: Vec<String>,
     #[doc = "Package names to be included for patching."]
-    #[serde(rename = "packageNameMasksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageNameMasksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_name_masks_to_include: Vec<String>,
     #[doc = "Classification category of patches to be patched"]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
 }
 impl InputLinuxParameters {
@@ -218,13 +233,28 @@ pub mod input_patch_configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InputWindowsParameters {
     #[doc = "Windows KBID to be excluded for patching."]
-    #[serde(rename = "kbNumbersToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_exclude: Vec<String>,
     #[doc = "Windows KBID to be included for patching."]
-    #[serde(rename = "kbNumbersToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "kbNumbersToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kb_numbers_to_include: Vec<String>,
     #[doc = "Classification category of patches to be patched"]
-    #[serde(rename = "classificationsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications_to_include: Vec<String>,
     #[doc = "Exclude patches which need reboot"]
     #[serde(rename = "excludeKbsRequiringReboot", default, skip_serializing_if = "Option::is_none")]
@@ -239,7 +269,11 @@ impl InputWindowsParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListApplyUpdate {
     #[doc = "The list of apply updates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplyUpdate>,
 }
 impl azure_core::Continuable for ListApplyUpdate {
@@ -257,7 +291,11 @@ impl ListApplyUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListConfigurationAssignmentsResult {
     #[doc = "The list of configuration Assignments"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationAssignment>,
 }
 impl azure_core::Continuable for ListConfigurationAssignmentsResult {
@@ -275,7 +313,11 @@ impl ListConfigurationAssignmentsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListMaintenanceConfigurationsResult {
     #[doc = "The list of maintenance Configurations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MaintenanceConfiguration>,
 }
 impl azure_core::Continuable for ListMaintenanceConfigurationsResult {
@@ -293,7 +335,11 @@ impl ListMaintenanceConfigurationsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListUpdatesResult {
     #[doc = "The pending updates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Update>,
 }
 impl azure_core::Continuable for ListUpdatesResult {
@@ -535,7 +581,11 @@ impl OperationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "A collection of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationsListResult {
@@ -750,10 +800,20 @@ impl UpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SoftwareUpdateConfigurationTasks {
     #[doc = "List of pre tasks. e.g. [{'source' :'runbook', 'taskScope': 'Global', 'parameters': { 'arg1': 'value1'}}]"]
-    #[serde(rename = "preTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pre_tasks: Vec<TaskProperties>,
     #[doc = "List of post tasks. e.g. [{'source' :'runbook', 'taskScope': 'Resource', 'parameters': { 'arg1': 'value1'}}]"]
-    #[serde(rename = "postTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "postTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub post_tasks: Vec<TaskProperties>,
 }
 impl SoftwareUpdateConfigurationTasks {
diff --git a/services/mgmt/managednetwork/src/package_2019_06_01_preview/models.rs b/services/mgmt/managednetwork/src/package_2019_06_01_preview/models.rs
index 7a2981938a..ed3b908fb6 100644
--- a/services/mgmt/managednetwork/src/package_2019_06_01_preview/models.rs
+++ b/services/mgmt/managednetwork/src/package_2019_06_01_preview/models.rs
@@ -7,10 +7,18 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectivityCollection {
     #[doc = "The collection of connectivity related Managed Network Groups within the Managed Network"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<ManagedNetworkGroup>,
     #[doc = "The collection of Managed Network Peering Policies within the Managed Network"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peerings: Vec<ManagedNetworkPeeringPolicy>,
 }
 impl ConnectivityCollection {
@@ -48,7 +56,11 @@ pub struct HubAndSpokePeeringPolicyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub hub: Option<ResourceId>,
     #[doc = "Gets or sets the spokes group IDs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub spokes: Vec<ResourceId>,
 }
 impl HubAndSpokePeeringPolicyProperties {
@@ -136,7 +148,11 @@ pub mod managed_network_group {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedNetworkGroupListResult {
     #[doc = "Gets a page of ManagedNetworkGroup"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedNetworkGroup>,
     #[doc = "Gets the URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -159,16 +175,34 @@ pub struct ManagedNetworkGroupProperties {
     #[serde(flatten)]
     pub resource_properties: ResourceProperties,
     #[doc = "The collection of management groups covered by the Managed Network"]
-    #[serde(rename = "managementGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managementGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub management_groups: Vec<ResourceId>,
     #[doc = "The collection of subscriptions covered by the Managed Network"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<ResourceId>,
     #[doc = "The collection of virtual nets covered by the Managed Network"]
-    #[serde(rename = "virtualNetworks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_networks: Vec<ResourceId>,
     #[doc = "The collection of  subnets covered by the Managed Network"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<ResourceId>,
 }
 impl ManagedNetworkGroupProperties {
@@ -180,7 +214,11 @@ impl ManagedNetworkGroupProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedNetworkListResult {
     #[doc = "Gets a page of ManagedNetworks"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedNetwork>,
     #[doc = "Gets the URL to get the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -215,7 +253,11 @@ impl ManagedNetworkPeeringPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedNetworkPeeringPolicyListResult {
     #[doc = "Gets a page of Peering Policies"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedNetworkPeeringPolicy>,
     #[doc = "Gets the URL to get the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -244,10 +286,18 @@ pub struct ManagedNetworkPeeringPolicyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub hub: Option<ResourceId>,
     #[doc = "Gets or sets the spokes group IDs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub spokes: Vec<ResourceId>,
     #[doc = "Gets or sets the mesh group IDs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mesh: Vec<ResourceId>,
 }
 impl ManagedNetworkPeeringPolicyProperties {
@@ -336,7 +386,11 @@ pub struct MeshPeeringPolicyProperties {
     #[serde(flatten)]
     pub managed_network_peering_policy_properties: ManagedNetworkPeeringPolicyProperties,
     #[doc = "Gets or sets the mesh group IDs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mesh: Vec<ResourceId>,
 }
 impl MeshPeeringPolicyProperties {
@@ -387,7 +441,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Resource Provider operations supported by the Managed Network resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -511,16 +569,34 @@ pub mod resource_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Scope {
     #[doc = "The collection of management groups covered by the Managed Network"]
-    #[serde(rename = "managementGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managementGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub management_groups: Vec<ResourceId>,
     #[doc = "The collection of subscriptions covered by the Managed Network"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<ResourceId>,
     #[doc = "The collection of virtual nets covered by the Managed Network"]
-    #[serde(rename = "virtualNetworks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_networks: Vec<ResourceId>,
     #[doc = "The collection of  subnets covered by the Managed Network"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<ResourceId>,
 }
 impl Scope {
@@ -546,7 +622,11 @@ impl ScopeAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScopeAssignmentListResult {
     #[doc = "Gets a page of ScopeAssignment"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScopeAssignment>,
     #[doc = "Gets the URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/managedservices/src/package_2019_04_preview/models.rs b/services/mgmt/managedservices/src/package_2019_04_preview/models.rs
index 6837db866e..510a601414 100644
--- a/services/mgmt/managedservices/src/package_2019_04_preview/models.rs
+++ b/services/mgmt/managedservices/src/package_2019_04_preview/models.rs
@@ -16,7 +16,12 @@ pub struct Authorization {
     #[serde(rename = "roleDefinitionId")]
     pub role_definition_id: String,
     #[doc = "The delegatedRoleDefinitionIds field is required when the roleDefinitionId refers to the User Access Administrator Role. It is the list of role definition ids which define all the permissions that the user in the authorization can assign to other security groups/service principals/users."]
-    #[serde(rename = "delegatedRoleDefinitionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "delegatedRoleDefinitionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegated_role_definition_ids: Vec<String>,
 }
 impl Authorization {
@@ -37,7 +42,11 @@ pub struct ErrorDefinition {
     #[doc = "Error message indicating why the operation failed."]
     pub message: String,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -110,7 +119,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of Microsoft.ManagedServices operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationList {
@@ -165,7 +178,11 @@ impl RegistrationAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistrationAssignmentList {
     #[doc = "List of registration assignments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegistrationAssignment>,
     #[doc = "Link to next page of registration assignments."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -296,7 +313,11 @@ pub mod registration_assignment_properties {
             #[serde(default, skip_serializing_if = "Option::is_none")]
             pub description: Option<String>,
             #[doc = "Authorization tuple containing principal id of the user/security group or service principal and id of the build-in role."]
-            #[serde(default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub authorizations: Vec<Authorization>,
             #[doc = "Name of the registration definition."]
             #[serde(rename = "registrationDefinitionName", default, skip_serializing_if = "Option::is_none")]
@@ -412,7 +433,11 @@ impl RegistrationDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistrationDefinitionList {
     #[doc = "List of registration definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegistrationDefinition>,
     #[doc = "Link to next page of registration definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/managedservices/src/package_2019_06/models.rs b/services/mgmt/managedservices/src/package_2019_06/models.rs
index 6837db866e..510a601414 100644
--- a/services/mgmt/managedservices/src/package_2019_06/models.rs
+++ b/services/mgmt/managedservices/src/package_2019_06/models.rs
@@ -16,7 +16,12 @@ pub struct Authorization {
     #[serde(rename = "roleDefinitionId")]
     pub role_definition_id: String,
     #[doc = "The delegatedRoleDefinitionIds field is required when the roleDefinitionId refers to the User Access Administrator Role. It is the list of role definition ids which define all the permissions that the user in the authorization can assign to other security groups/service principals/users."]
-    #[serde(rename = "delegatedRoleDefinitionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "delegatedRoleDefinitionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegated_role_definition_ids: Vec<String>,
 }
 impl Authorization {
@@ -37,7 +42,11 @@ pub struct ErrorDefinition {
     #[doc = "Error message indicating why the operation failed."]
     pub message: String,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -110,7 +119,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of Microsoft.ManagedServices operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationList {
@@ -165,7 +178,11 @@ impl RegistrationAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistrationAssignmentList {
     #[doc = "List of registration assignments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegistrationAssignment>,
     #[doc = "Link to next page of registration assignments."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -296,7 +313,11 @@ pub mod registration_assignment_properties {
             #[serde(default, skip_serializing_if = "Option::is_none")]
             pub description: Option<String>,
             #[doc = "Authorization tuple containing principal id of the user/security group or service principal and id of the build-in role."]
-            #[serde(default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub authorizations: Vec<Authorization>,
             #[doc = "Name of the registration definition."]
             #[serde(rename = "registrationDefinitionName", default, skip_serializing_if = "Option::is_none")]
@@ -412,7 +433,11 @@ impl RegistrationDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistrationDefinitionList {
     #[doc = "List of registration definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegistrationDefinition>,
     #[doc = "Link to next page of registration definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/managedservices/src/package_2019_09/models.rs b/services/mgmt/managedservices/src/package_2019_09/models.rs
index 3b01736dd9..d685faa87d 100644
--- a/services/mgmt/managedservices/src/package_2019_09/models.rs
+++ b/services/mgmt/managedservices/src/package_2019_09/models.rs
@@ -16,7 +16,12 @@ pub struct Authorization {
     #[serde(rename = "roleDefinitionId")]
     pub role_definition_id: String,
     #[doc = "The delegatedRoleDefinitionIds field is required when the roleDefinitionId refers to the User Access Administrator Role. It is the list of role definition ids which define all the permissions that the user in the authorization can assign to other security groups/service principals/users."]
-    #[serde(rename = "delegatedRoleDefinitionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "delegatedRoleDefinitionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegated_role_definition_ids: Vec<String>,
 }
 impl Authorization {
@@ -37,7 +42,11 @@ pub struct ErrorDefinition {
     #[doc = "Error message indicating why the operation failed."]
     pub message: String,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -94,7 +103,11 @@ impl MarketplaceRegistrationDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MarketplaceRegistrationDefinitionList {
     #[doc = "List of marketplace registration definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MarketplaceRegistrationDefinition>,
     #[doc = "Link to next page of marketplace registration definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -183,7 +196,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of Microsoft.ManagedServices operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationList {
@@ -238,7 +255,11 @@ impl RegistrationAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistrationAssignmentList {
     #[doc = "List of registration assignments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegistrationAssignment>,
     #[doc = "Link to next page of registration assignments."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -369,7 +390,11 @@ pub mod registration_assignment_properties {
             #[serde(default, skip_serializing_if = "Option::is_none")]
             pub description: Option<String>,
             #[doc = "Authorization tuple containing principal id of the user/security group or service principal and id of the build-in role."]
-            #[serde(default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub authorizations: Vec<Authorization>,
             #[doc = "Name of the registration definition."]
             #[serde(rename = "registrationDefinitionName", default, skip_serializing_if = "Option::is_none")]
@@ -485,7 +510,11 @@ impl RegistrationDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistrationDefinitionList {
     #[doc = "List of registration definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegistrationDefinition>,
     #[doc = "Link to next page of registration definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/managedservices/src/package_2020_02_preview/models.rs b/services/mgmt/managedservices/src/package_2020_02_preview/models.rs
index 8abd39edd2..c5b7946b66 100644
--- a/services/mgmt/managedservices/src/package_2020_02_preview/models.rs
+++ b/services/mgmt/managedservices/src/package_2020_02_preview/models.rs
@@ -16,7 +16,12 @@ pub struct Authorization {
     #[serde(rename = "roleDefinitionId")]
     pub role_definition_id: String,
     #[doc = "The delegatedRoleDefinitionIds field is required when the roleDefinitionId refers to the User Access Administrator Role. It is the list of role definition ids which define all the permissions that the user in the authorization can assign to other principals."]
-    #[serde(rename = "delegatedRoleDefinitionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "delegatedRoleDefinitionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegated_role_definition_ids: Vec<String>,
 }
 impl Authorization {
@@ -81,7 +86,11 @@ pub struct ErrorDefinition {
     #[doc = "The error message indicating why the operation failed."]
     pub message: String,
     #[doc = "The internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -121,7 +130,12 @@ pub struct JustInTimeAccessPolicy {
     #[serde(rename = "maximumActivationDuration", default, skip_serializing_if = "Option::is_none")]
     pub maximum_activation_duration: Option<String>,
     #[doc = "The list of managedByTenant approvers for the eligible authorization."]
-    #[serde(rename = "managedByTenantApprovers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedByTenantApprovers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_by_tenant_approvers: Vec<EligibleApprover>,
 }
 impl JustInTimeAccessPolicy {
@@ -205,7 +219,11 @@ impl MarketplaceRegistrationDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MarketplaceRegistrationDefinitionList {
     #[doc = "The list of marketplace registration definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MarketplaceRegistrationDefinition>,
     #[doc = "The link to the next page of marketplace registration definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -231,7 +249,12 @@ pub struct MarketplaceRegistrationDefinitionProperties {
     #[doc = "The collection of authorization objects describing the access Azure Active Directory principals in the managedBy tenant will receive on the delegated resource in the managed tenant."]
     pub authorizations: Vec<Authorization>,
     #[doc = "The collection of eligible authorization objects describing the just-in-time access Azure Active Directory principals in the managedBy tenant will receive on the delegated resource in the managed tenant."]
-    #[serde(rename = "eligibleAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eligibleAuthorizations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub eligible_authorizations: Vec<EligibleAuthorization>,
     #[doc = "The marketplace offer display name."]
     #[serde(rename = "offerDisplayName", default, skip_serializing_if = "Option::is_none")]
@@ -298,7 +321,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "The list of Microsoft.ManagedServices operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationList {
@@ -353,7 +380,11 @@ impl RegistrationAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistrationAssignmentList {
     #[doc = "The list of registration assignments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegistrationAssignment>,
     #[doc = "The link to the next page of registration assignments."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -484,10 +515,19 @@ pub mod registration_assignment_properties {
             #[serde(default, skip_serializing_if = "Option::is_none")]
             pub description: Option<String>,
             #[doc = "The collection of authorization objects describing the access Azure Active Directory principals in the managedBy tenant will receive on the delegated resource in the managed tenant."]
-            #[serde(default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub authorizations: Vec<Authorization>,
             #[doc = "The collection of eligible authorization objects describing the just-in-time access Azure Active Directory principals in the managedBy tenant will receive on the delegated resource in the managed tenant."]
-            #[serde(rename = "eligibleAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                rename = "eligibleAuthorizations",
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub eligible_authorizations: Vec<EligibleAuthorization>,
             #[doc = "The name of the registration definition."]
             #[serde(rename = "registrationDefinitionName", default, skip_serializing_if = "Option::is_none")]
@@ -603,7 +643,11 @@ impl RegistrationDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistrationDefinitionList {
     #[doc = "The list of registration definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegistrationDefinition>,
     #[doc = "The link to the next page of registration definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -629,7 +673,12 @@ pub struct RegistrationDefinitionProperties {
     #[doc = "The collection of authorization objects describing the access Azure Active Directory principals in the managedBy tenant will receive on the delegated resource in the managed tenant."]
     pub authorizations: Vec<Authorization>,
     #[doc = "The collection of eligible authorization objects describing the just-in-time access Azure Active Directory principals in the managedBy tenant will receive on the delegated resource in the managed tenant."]
-    #[serde(rename = "eligibleAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eligibleAuthorizations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub eligible_authorizations: Vec<EligibleAuthorization>,
     #[doc = "The name of the registration definition."]
     #[serde(rename = "registrationDefinitionName", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/managedservices/src/package_preview_2022_01/models.rs b/services/mgmt/managedservices/src/package_preview_2022_01/models.rs
index 73cd7bada5..339a696414 100644
--- a/services/mgmt/managedservices/src/package_preview_2022_01/models.rs
+++ b/services/mgmt/managedservices/src/package_preview_2022_01/models.rs
@@ -16,7 +16,12 @@ pub struct Authorization {
     #[serde(rename = "roleDefinitionId")]
     pub role_definition_id: String,
     #[doc = "The delegatedRoleDefinitionIds field is required when the roleDefinitionId refers to the User Access Administrator Role. It is the list of role definition ids which define all the permissions that the user in the authorization can assign to other principals."]
-    #[serde(rename = "delegatedRoleDefinitionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "delegatedRoleDefinitionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegated_role_definition_ids: Vec<String>,
 }
 impl Authorization {
@@ -81,7 +86,11 @@ pub struct ErrorDefinition {
     #[doc = "The error message indicating why the operation failed."]
     pub message: String,
     #[doc = "The internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -121,7 +130,12 @@ pub struct JustInTimeAccessPolicy {
     #[serde(rename = "maximumActivationDuration", default, skip_serializing_if = "Option::is_none")]
     pub maximum_activation_duration: Option<String>,
     #[doc = "The list of managedByTenant approvers for the eligible authorization."]
-    #[serde(rename = "managedByTenantApprovers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedByTenantApprovers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_by_tenant_approvers: Vec<EligibleApprover>,
 }
 impl JustInTimeAccessPolicy {
@@ -205,7 +219,11 @@ impl MarketplaceRegistrationDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MarketplaceRegistrationDefinitionList {
     #[doc = "The list of marketplace registration definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MarketplaceRegistrationDefinition>,
     #[doc = "The link to the next page of marketplace registration definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -231,7 +249,12 @@ pub struct MarketplaceRegistrationDefinitionProperties {
     #[doc = "The collection of authorization objects describing the access Azure Active Directory principals in the managedBy tenant will receive on the delegated resource in the managed tenant."]
     pub authorizations: Vec<Authorization>,
     #[doc = "The collection of eligible authorization objects describing the just-in-time access Azure Active Directory principals in the managedBy tenant will receive on the delegated resource in the managed tenant."]
-    #[serde(rename = "eligibleAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eligibleAuthorizations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub eligible_authorizations: Vec<EligibleAuthorization>,
     #[doc = "The marketplace offer display name."]
     #[serde(rename = "offerDisplayName", default, skip_serializing_if = "Option::is_none")]
@@ -298,7 +321,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "The list of Microsoft.ManagedServices operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationList {
@@ -356,7 +383,11 @@ impl RegistrationAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistrationAssignmentList {
     #[doc = "The list of registration assignments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegistrationAssignment>,
     #[doc = "The link to the next page of registration assignments."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -490,10 +521,19 @@ pub mod registration_assignment_properties {
             #[serde(default, skip_serializing_if = "Option::is_none")]
             pub description: Option<String>,
             #[doc = "The collection of authorization objects describing the access Azure Active Directory principals in the managedBy tenant will receive on the delegated resource in the managed tenant."]
-            #[serde(default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub authorizations: Vec<Authorization>,
             #[doc = "The collection of eligible authorization objects describing the just-in-time access Azure Active Directory principals in the managedBy tenant will receive on the delegated resource in the managed tenant."]
-            #[serde(rename = "eligibleAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                rename = "eligibleAuthorizations",
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub eligible_authorizations: Vec<EligibleAuthorization>,
             #[doc = "The name of the registration definition."]
             #[serde(rename = "registrationDefinitionName", default, skip_serializing_if = "Option::is_none")]
@@ -612,7 +652,11 @@ impl RegistrationDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegistrationDefinitionList {
     #[doc = "The list of registration definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegistrationDefinition>,
     #[doc = "The link to the next page of registration definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -638,7 +682,12 @@ pub struct RegistrationDefinitionProperties {
     #[doc = "The collection of authorization objects describing the access Azure Active Directory principals in the managedBy tenant will receive on the delegated resource in the managed tenant."]
     pub authorizations: Vec<Authorization>,
     #[doc = "The collection of eligible authorization objects describing the just-in-time access Azure Active Directory principals in the managedBy tenant will receive on the delegated resource in the managed tenant."]
-    #[serde(rename = "eligibleAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eligibleAuthorizations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub eligible_authorizations: Vec<EligibleAuthorization>,
     #[doc = "The name of the registration definition."]
     #[serde(rename = "registrationDefinitionName", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/managementgroups/src/package_2019_11/models.rs b/services/mgmt/managementgroups/src/package_2019_11/models.rs
index 7c8982b941..40c581b750 100644
--- a/services/mgmt/managementgroups/src/package_2019_11/models.rs
+++ b/services/mgmt/managementgroups/src/package_2019_11/models.rs
@@ -70,10 +70,18 @@ pub struct CreateManagementGroupChildInfo {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The roles definitions associated with the management group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<CreateManagementGroupChildInfo>,
 }
 impl CreateManagementGroupChildInfo {
@@ -112,13 +120,21 @@ pub struct CreateManagementGroupProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The roles definitions associated with the management group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
     #[doc = "The details of a management group used during creation."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub details: Option<CreateManagementGroupDetails>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<CreateManagementGroupChildInfo>,
 }
 impl CreateManagementGroupProperties {
@@ -205,7 +221,11 @@ impl DescendantInfoProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DescendantListResult {
     #[doc = "The list of descendants."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DescendantInfo>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -265,7 +285,11 @@ pub struct EntityHierarchyItemProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub permissions: Option<Permissions>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<EntityHierarchyItem>,
 }
 impl EntityHierarchyItemProperties {
@@ -321,10 +345,20 @@ pub struct EntityInfoProperties {
     #[serde(rename = "numberOfChildGroups", default, skip_serializing_if = "Option::is_none")]
     pub number_of_child_groups: Option<i64>,
     #[doc = "The parent display name chain from the root group to the immediate parent"]
-    #[serde(rename = "parentDisplayNameChain", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parentDisplayNameChain",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parent_display_name_chain: Vec<String>,
     #[doc = "The parent name chain from the root group to the immediate parent"]
-    #[serde(rename = "parentNameChain", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parentNameChain",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parent_name_chain: Vec<String>,
 }
 impl EntityInfoProperties {
@@ -336,7 +370,11 @@ impl EntityInfoProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EntityListResult {
     #[doc = "The list of entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityInfo>,
     #[doc = "Total count of records that match the filter"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -441,10 +479,18 @@ pub struct ManagementGroupChildInfo {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The roles definitions associated with the management group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<ManagementGroupChildInfo>,
 }
 impl ManagementGroupChildInfo {
@@ -521,7 +567,11 @@ impl ManagementGroupInfoProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagementGroupListResult {
     #[doc = "The list of management groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagementGroupInfo>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -563,16 +613,28 @@ pub struct ManagementGroupProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The role definitions associated with the management group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
     #[doc = "The details of a management group."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub details: Option<ManagementGroupDetails>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<ManagementGroupChildInfo>,
     #[doc = "The hierarchial path from the root group to the current group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path: Vec<ManagementGroupPathElement>,
 }
 impl ManagementGroupProperties {
@@ -620,7 +682,11 @@ impl OperationDisplayProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Management resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/managementgroups/src/package_2020_02/models.rs b/services/mgmt/managementgroups/src/package_2020_02/models.rs
index 617171452b..89c4c7921f 100644
--- a/services/mgmt/managementgroups/src/package_2020_02/models.rs
+++ b/services/mgmt/managementgroups/src/package_2020_02/models.rs
@@ -94,10 +94,18 @@ pub struct CreateManagementGroupChildInfo {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The roles definitions associated with the management group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<CreateManagementGroupChildInfo>,
 }
 impl CreateManagementGroupChildInfo {
@@ -136,13 +144,21 @@ pub struct CreateManagementGroupProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The roles definitions associated with the management group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
     #[doc = "The details of a management group used during creation."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub details: Option<CreateManagementGroupDetails>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<CreateManagementGroupChildInfo>,
 }
 impl CreateManagementGroupProperties {
@@ -256,7 +272,11 @@ impl DescendantInfoProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DescendantListResult {
     #[doc = "The list of descendants."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DescendantInfo>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -316,7 +336,11 @@ pub struct EntityHierarchyItemProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub permissions: Option<Permissions>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<EntityHierarchyItem>,
 }
 impl EntityHierarchyItemProperties {
@@ -372,10 +396,20 @@ pub struct EntityInfoProperties {
     #[serde(rename = "numberOfChildGroups", default, skip_serializing_if = "Option::is_none")]
     pub number_of_child_groups: Option<i64>,
     #[doc = "The parent display name chain from the root group to the immediate parent"]
-    #[serde(rename = "parentDisplayNameChain", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parentDisplayNameChain",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parent_display_name_chain: Vec<String>,
     #[doc = "The parent name chain from the root group to the immediate parent"]
-    #[serde(rename = "parentNameChain", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parentNameChain",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parent_name_chain: Vec<String>,
 }
 impl EntityInfoProperties {
@@ -387,7 +421,11 @@ impl EntityInfoProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EntityListResult {
     #[doc = "The list of entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityInfo>,
     #[doc = "Total count of records that match the filter"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -501,7 +539,11 @@ impl HierarchySettingsInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HierarchySettingsList {
     #[doc = "The list of hierarchy settings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HierarchySettingsInfo>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -567,10 +609,18 @@ pub struct ManagementGroupChildInfo {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The roles definitions associated with the management group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<ManagementGroupChildInfo>,
 }
 impl ManagementGroupChildInfo {
@@ -647,7 +697,11 @@ impl ManagementGroupInfoProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagementGroupListResult {
     #[doc = "The list of management groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagementGroupInfo>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -689,16 +743,28 @@ pub struct ManagementGroupProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The role definitions associated with the management group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
     #[doc = "The details of a management group."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub details: Option<ManagementGroupDetails>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<ManagementGroupChildInfo>,
     #[doc = "The path from the root to the current group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path: Vec<ManagementGroupPathElement>,
 }
 impl ManagementGroupProperties {
@@ -746,7 +812,11 @@ impl OperationDisplayProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Management resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/managementgroups/src/package_2020_05/models.rs b/services/mgmt/managementgroups/src/package_2020_05/models.rs
index 2fbbc269bb..b9de1e9275 100644
--- a/services/mgmt/managementgroups/src/package_2020_05/models.rs
+++ b/services/mgmt/managementgroups/src/package_2020_05/models.rs
@@ -94,7 +94,11 @@ pub struct CreateManagementGroupChildInfo {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<CreateManagementGroupChildInfo>,
 }
 impl CreateManagementGroupChildInfo {
@@ -136,7 +140,11 @@ pub struct CreateManagementGroupProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub details: Option<CreateManagementGroupDetails>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<CreateManagementGroupChildInfo>,
 }
 impl CreateManagementGroupProperties {
@@ -250,7 +258,11 @@ impl DescendantInfoProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DescendantListResult {
     #[doc = "The list of descendants."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DescendantInfo>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -310,7 +322,11 @@ pub struct EntityHierarchyItemProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub permissions: Option<Permissions>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<EntityHierarchyItem>,
 }
 impl EntityHierarchyItemProperties {
@@ -366,10 +382,20 @@ pub struct EntityInfoProperties {
     #[serde(rename = "numberOfChildGroups", default, skip_serializing_if = "Option::is_none")]
     pub number_of_child_groups: Option<i64>,
     #[doc = "The parent display name chain from the root group to the immediate parent"]
-    #[serde(rename = "parentDisplayNameChain", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parentDisplayNameChain",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parent_display_name_chain: Vec<String>,
     #[doc = "The parent name chain from the root group to the immediate parent"]
-    #[serde(rename = "parentNameChain", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parentNameChain",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parent_name_chain: Vec<String>,
 }
 impl EntityInfoProperties {
@@ -381,7 +407,11 @@ impl EntityInfoProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EntityListResult {
     #[doc = "The list of entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityInfo>,
     #[doc = "Total count of records that match the filter"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -495,7 +525,11 @@ impl HierarchySettingsInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HierarchySettingsList {
     #[doc = "The list of hierarchy settings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HierarchySettingsInfo>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -528,7 +562,11 @@ impl HierarchySettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListSubscriptionUnderManagementGroup {
     #[doc = "The list of subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionUnderManagementGroup>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -582,7 +620,11 @@ pub struct ManagementGroupChildInfo {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<ManagementGroupChildInfo>,
 }
 impl ManagementGroupChildInfo {
@@ -614,7 +656,11 @@ pub struct ManagementGroupDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parent: Option<ParentGroupInfo>,
     #[doc = "The path from the root to the current group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path: Vec<ManagementGroupPathElement>,
 }
 impl ManagementGroupDetails {
@@ -662,7 +708,11 @@ impl ManagementGroupInfoProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagementGroupListResult {
     #[doc = "The list of management groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagementGroupInfo>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -707,7 +757,11 @@ pub struct ManagementGroupProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub details: Option<ManagementGroupDetails>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<ManagementGroupChildInfo>,
 }
 impl ManagementGroupProperties {
@@ -755,7 +809,11 @@ impl OperationDisplayProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Management resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/managementgroups/src/package_2020_10/models.rs b/services/mgmt/managementgroups/src/package_2020_10/models.rs
index 9bb10fab1b..76c0e1d0a9 100644
--- a/services/mgmt/managementgroups/src/package_2020_10/models.rs
+++ b/services/mgmt/managementgroups/src/package_2020_10/models.rs
@@ -94,7 +94,11 @@ pub struct CreateManagementGroupChildInfo {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<CreateManagementGroupChildInfo>,
 }
 impl CreateManagementGroupChildInfo {
@@ -136,7 +140,11 @@ pub struct CreateManagementGroupProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub details: Option<CreateManagementGroupDetails>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<CreateManagementGroupChildInfo>,
 }
 impl CreateManagementGroupProperties {
@@ -250,7 +258,11 @@ impl DescendantInfoProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DescendantListResult {
     #[doc = "The list of descendants."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DescendantInfo>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -310,7 +322,11 @@ pub struct EntityHierarchyItemProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub permissions: Option<Permissions>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<EntityHierarchyItem>,
 }
 impl EntityHierarchyItemProperties {
@@ -366,10 +382,20 @@ pub struct EntityInfoProperties {
     #[serde(rename = "numberOfChildGroups", default, skip_serializing_if = "Option::is_none")]
     pub number_of_child_groups: Option<i64>,
     #[doc = "The parent display name chain from the root group to the immediate parent"]
-    #[serde(rename = "parentDisplayNameChain", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parentDisplayNameChain",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parent_display_name_chain: Vec<String>,
     #[doc = "The parent name chain from the root group to the immediate parent"]
-    #[serde(rename = "parentNameChain", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parentNameChain",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parent_name_chain: Vec<String>,
 }
 impl EntityInfoProperties {
@@ -381,7 +407,11 @@ impl EntityInfoProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EntityListResult {
     #[doc = "The list of entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityInfo>,
     #[doc = "Total count of records that match the filter"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -495,7 +525,11 @@ impl HierarchySettingsInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HierarchySettingsList {
     #[doc = "The list of hierarchy settings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HierarchySettingsInfo>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -528,7 +562,11 @@ impl HierarchySettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListSubscriptionUnderManagementGroup {
     #[doc = "The list of subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionUnderManagementGroup>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -582,7 +620,11 @@ pub struct ManagementGroupChildInfo {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<ManagementGroupChildInfo>,
 }
 impl ManagementGroupChildInfo {
@@ -614,10 +656,19 @@ pub struct ManagementGroupDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parent: Option<ParentGroupInfo>,
     #[doc = "The path from the root to the current group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path: Vec<ManagementGroupPathElement>,
     #[doc = "The ancestors of the management group."]
-    #[serde(rename = "managementGroupAncestors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managementGroupAncestors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub management_group_ancestors: Vec<String>,
 }
 impl ManagementGroupDetails {
@@ -665,7 +716,11 @@ impl ManagementGroupInfoProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagementGroupListResult {
     #[doc = "The list of management groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagementGroupInfo>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -710,7 +765,11 @@ pub struct ManagementGroupProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub details: Option<ManagementGroupDetails>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<ManagementGroupChildInfo>,
 }
 impl ManagementGroupProperties {
@@ -758,7 +817,11 @@ impl OperationDisplayProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Management resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/managementgroups/src/package_2021_04/models.rs b/services/mgmt/managementgroups/src/package_2021_04/models.rs
index 6ba9bd296d..af89cd41ee 100644
--- a/services/mgmt/managementgroups/src/package_2021_04/models.rs
+++ b/services/mgmt/managementgroups/src/package_2021_04/models.rs
@@ -94,7 +94,11 @@ pub struct CreateManagementGroupChildInfo {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<CreateManagementGroupChildInfo>,
 }
 impl CreateManagementGroupChildInfo {
@@ -136,7 +140,11 @@ pub struct CreateManagementGroupProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub details: Option<CreateManagementGroupDetails>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<CreateManagementGroupChildInfo>,
 }
 impl CreateManagementGroupProperties {
@@ -250,7 +258,11 @@ impl DescendantInfoProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DescendantListResult {
     #[doc = "The list of descendants."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DescendantInfo>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -310,7 +322,11 @@ pub struct EntityHierarchyItemProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub permissions: Option<Permissions>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<EntityHierarchyItem>,
 }
 impl EntityHierarchyItemProperties {
@@ -366,10 +382,20 @@ pub struct EntityInfoProperties {
     #[serde(rename = "numberOfChildGroups", default, skip_serializing_if = "Option::is_none")]
     pub number_of_child_groups: Option<i64>,
     #[doc = "The parent display name chain from the root group to the immediate parent"]
-    #[serde(rename = "parentDisplayNameChain", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parentDisplayNameChain",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parent_display_name_chain: Vec<String>,
     #[doc = "The parent name chain from the root group to the immediate parent"]
-    #[serde(rename = "parentNameChain", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parentNameChain",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parent_name_chain: Vec<String>,
 }
 impl EntityInfoProperties {
@@ -381,7 +407,11 @@ impl EntityInfoProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EntityListResult {
     #[doc = "The list of entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityInfo>,
     #[doc = "Total count of records that match the filter"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -495,7 +525,11 @@ impl HierarchySettingsInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HierarchySettingsList {
     #[doc = "The list of hierarchy settings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HierarchySettingsInfo>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -528,7 +562,11 @@ impl HierarchySettingsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListSubscriptionUnderManagementGroup {
     #[doc = "The list of subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionUnderManagementGroup>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -582,7 +620,11 @@ pub struct ManagementGroupChildInfo {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<ManagementGroupChildInfo>,
 }
 impl ManagementGroupChildInfo {
@@ -614,13 +656,27 @@ pub struct ManagementGroupDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub parent: Option<ParentGroupInfo>,
     #[doc = "The path from the root to the current group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path: Vec<ManagementGroupPathElement>,
     #[doc = "The ancestors of the management group."]
-    #[serde(rename = "managementGroupAncestors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managementGroupAncestors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub management_group_ancestors: Vec<String>,
     #[doc = "The ancestors of the management group displayed in reversed order, from immediate parent to the root."]
-    #[serde(rename = "managementGroupAncestorsChain", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managementGroupAncestorsChain",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub management_group_ancestors_chain: Vec<ManagementGroupPathElement>,
 }
 impl ManagementGroupDetails {
@@ -668,7 +724,11 @@ impl ManagementGroupInfoProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagementGroupListResult {
     #[doc = "The list of management groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagementGroupInfo>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -713,7 +773,11 @@ pub struct ManagementGroupProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub details: Option<ManagementGroupDetails>,
     #[doc = "The list of children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<ManagementGroupChildInfo>,
 }
 impl ManagementGroupProperties {
@@ -761,7 +825,11 @@ impl OperationDisplayProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Management resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/managementpartner/src/package_2018_02/models.rs b/services/mgmt/managementpartner/src/package_2018_02/models.rs
index d3a82888ee..2af5d763a6 100644
--- a/services/mgmt/managementpartner/src/package_2018_02/models.rs
+++ b/services/mgmt/managementpartner/src/package_2018_02/models.rs
@@ -105,7 +105,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "this is the operation response list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResponse>,
     #[doc = "Url to get the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/maps/src/package_2018_05/models.rs b/services/mgmt/maps/src/package_2018_05/models.rs
index bbda8eba64..f9d100c3f7 100644
--- a/services/mgmt/maps/src/package_2018_05/models.rs
+++ b/services/mgmt/maps/src/package_2018_05/models.rs
@@ -16,7 +16,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "If available, a list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<serde_json::Value>,
 }
 impl azure_core::Continuable for Error {
@@ -118,7 +122,11 @@ impl MapsAccountUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MapsAccounts {
     #[doc = "a Maps Account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MapsAccount>,
 }
 impl azure_core::Continuable for MapsAccounts {
@@ -208,7 +216,11 @@ pub mod maps_key_specification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MapsOperations {
     #[doc = "An operation available for Maps."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<serde_json::Value>,
 }
 impl azure_core::Continuable for MapsOperations {
diff --git a/services/mgmt/maps/src/package_2021_02/models.rs b/services/mgmt/maps/src/package_2021_02/models.rs
index 2b32d04d89..928b8ef01b 100644
--- a/services/mgmt/maps/src/package_2021_02/models.rs
+++ b/services/mgmt/maps/src/package_2021_02/models.rs
@@ -23,7 +23,11 @@ impl Creator {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CreatorList {
     #[doc = "a Creator account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Creator>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -128,10 +132,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -291,7 +304,11 @@ impl MapsAccountUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MapsAccounts {
     #[doc = "a Maps Account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MapsAccount>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -366,7 +383,11 @@ pub mod maps_key_specification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MapsOperations {
     #[doc = "An operation available for Maps."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -399,7 +420,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Dimensions of map account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Aggregation type could be Average."]
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -498,7 +523,12 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
diff --git a/services/mgmt/maps/src/package_preview_2020_02/models.rs b/services/mgmt/maps/src/package_preview_2020_02/models.rs
index b31b679df5..fbc7dc3eba 100644
--- a/services/mgmt/maps/src/package_preview_2020_02/models.rs
+++ b/services/mgmt/maps/src/package_preview_2020_02/models.rs
@@ -38,7 +38,11 @@ impl CreatorCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CreatorList {
     #[doc = "a Creator account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Creator>,
 }
 impl azure_core::Continuable for CreatorList {
@@ -104,10 +108,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -223,7 +236,11 @@ impl MapsAccountUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MapsAccounts {
     #[doc = "a Maps Account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MapsAccount>,
 }
 impl azure_core::Continuable for MapsAccounts {
@@ -295,7 +312,11 @@ pub mod maps_key_specification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MapsOperations {
     #[doc = "An operation available for Maps."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<serde_json::Value>,
 }
 impl azure_core::Continuable for MapsOperations {
@@ -344,7 +365,11 @@ impl PrivateAtlasCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateAtlasList {
     #[doc = "a Private Atlas."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateAtlas>,
 }
 impl azure_core::Continuable for PrivateAtlasList {
diff --git a/services/mgmt/maps/src/package_preview_2021_07/models.rs b/services/mgmt/maps/src/package_preview_2021_07/models.rs
index 56b5680993..c940223b7f 100644
--- a/services/mgmt/maps/src/package_preview_2021_07/models.rs
+++ b/services/mgmt/maps/src/package_preview_2021_07/models.rs
@@ -23,7 +23,11 @@ impl Creator {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CreatorList {
     #[doc = "a Creator account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Creator>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -128,10 +132,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -349,7 +362,11 @@ impl MapsAccountUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MapsAccounts {
     #[doc = "a Maps Account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MapsAccount>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -424,7 +441,11 @@ pub mod maps_key_specification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MapsOperations {
     #[doc = "An operation available for Maps."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -457,7 +478,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Dimensions of map account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Aggregation type could be Average."]
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -556,7 +581,12 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
diff --git a/services/mgmt/maps/src/package_preview_2021_12/models.rs b/services/mgmt/maps/src/package_preview_2021_12/models.rs
index 3decab1b7a..9192d969c7 100644
--- a/services/mgmt/maps/src/package_preview_2021_12/models.rs
+++ b/services/mgmt/maps/src/package_preview_2021_12/models.rs
@@ -13,7 +13,11 @@ pub struct AccountSasParameters {
     #[serde(rename = "principalId")]
     pub principal_id: String,
     #[doc = "Optional, allows control of which region locations are permitted access to Azure Maps REST APIs with the SAS token. Example: \"eastus\", \"westus2\". Omitting this parameter will allow all region locations to be accessible."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<String>,
     #[doc = "Required parameter which represents the desired maximum request per second to allowed for the given SAS token. This does not guarantee perfect accuracy in measurements but provides application safe guards of abuse with eventual enforcement."]
     #[serde(rename = "maxRatePerSecond")]
@@ -99,7 +103,12 @@ impl CorsRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CorsRules {
     #[doc = "The list of CORS rules. You can include up to five CorsRule elements in the request. "]
-    #[serde(rename = "corsRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "corsRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors_rules: Vec<CorsRule>,
 }
 impl CorsRules {
@@ -131,7 +140,11 @@ impl Creator {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CreatorList {
     #[doc = "a Creator account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Creator>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -236,10 +249,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -472,7 +494,11 @@ impl MapsAccountUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MapsAccounts {
     #[doc = "a Maps Account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MapsAccount>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -547,7 +573,11 @@ pub mod maps_key_specification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MapsOperations {
     #[doc = "An operation available for Maps."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -580,7 +610,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Dimensions of map account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Aggregation type could be Average."]
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -685,7 +719,12 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
diff --git a/services/mgmt/mariadb/src/package_2018_06_01/models.rs b/services/mgmt/mariadb/src/package_2018_06_01/models.rs
index 6d3a7f0628..6a69383144 100644
--- a/services/mgmt/mariadb/src/package_2018_06_01/models.rs
+++ b/services/mgmt/mariadb/src/package_2018_06_01/models.rs
@@ -29,7 +29,11 @@ impl AdvisorProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdvisorsResultList {
     #[doc = "The list of recommendation action advisors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Advisor>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -82,7 +86,11 @@ impl Configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
 }
 impl azure_core::Continuable for ConfigurationListResult {
@@ -141,7 +149,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of databases housed in a server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
 }
 impl azure_core::Continuable for DatabaseListResult {
@@ -198,10 +210,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -229,7 +250,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of firewall rules in a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
 }
 impl azure_core::Continuable for FirewallRuleListResult {
@@ -282,7 +307,11 @@ impl LogFile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogFileListResult {
     #[doc = "The list of log files."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogFile>,
 }
 impl azure_core::Continuable for LogFileListResult {
@@ -487,7 +516,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of resource provider operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationListResult {
@@ -499,7 +532,11 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PerformanceTierListResult {
     #[doc = "The list of performance tiers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PerformanceTierProperties>,
 }
 impl azure_core::Continuable for PerformanceTierListResult {
@@ -538,7 +575,12 @@ pub struct PerformanceTierProperties {
     #[serde(rename = "minStorageMB", default, skip_serializing_if = "Option::is_none")]
     pub min_storage_mb: Option<i32>,
     #[doc = "Service level objectives associated with the performance tier"]
-    #[serde(rename = "serviceLevelObjectives", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceLevelObjectives",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_level_objectives: Vec<PerformanceTierServiceLevelObjectives>,
 }
 impl PerformanceTierProperties {
@@ -597,7 +639,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -659,7 +705,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -683,7 +733,12 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -843,7 +898,12 @@ pub struct QueryStatisticProperties {
     #[serde(rename = "aggregationFunction", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_function: Option<String>,
     #[doc = "The list of database names."]
-    #[serde(rename = "databaseNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_names: Vec<String>,
     #[doc = "Number of query executions in this time interval."]
     #[serde(rename = "queryExecutionCount", default, skip_serializing_if = "Option::is_none")]
@@ -899,7 +959,11 @@ impl QueryTextProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryTextsResultList {
     #[doc = "The list of query texts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueryText>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -967,7 +1031,11 @@ impl RecommendationActionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecommendationActionsResultList {
     #[doc = "The list of recommendation action advisors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecommendationAction>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1067,10 +1135,20 @@ pub struct SecurityAlertPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled."]
     pub state: security_alert_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -1156,7 +1234,11 @@ impl ServerForCreate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "The list of servers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
 }
 impl azure_core::Continuable for ServerListResult {
@@ -1385,7 +1467,12 @@ pub struct ServerProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<PublicNetworkAccess>,
     #[doc = "List of private endpoint connections on a server"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ServerPrivateEndpointConnection>,
 }
 impl ServerProperties {
@@ -1615,7 +1702,11 @@ impl ServerSecurityAlertPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1965,7 +2056,11 @@ impl TopQueryStatisticsInputProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopQueryStatisticsResultList {
     #[doc = "The list of top query statistics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueryStatistic>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2020,7 +2115,11 @@ impl VirtualNetworkRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkRuleListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkRule>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2196,7 +2295,11 @@ impl WaitStatisticsInputProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WaitStatisticsResultList {
     #[doc = "The list of wait statistics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WaitStatistic>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/mariadb/src/package_2018_06_01_preview/models.rs b/services/mgmt/mariadb/src/package_2018_06_01_preview/models.rs
index 5d5b8ca758..8f9dcce4be 100644
--- a/services/mgmt/mariadb/src/package_2018_06_01_preview/models.rs
+++ b/services/mgmt/mariadb/src/package_2018_06_01_preview/models.rs
@@ -34,7 +34,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -60,7 +64,11 @@ impl Configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
 }
 impl azure_core::Continuable for ConfigurationListResult {
@@ -119,7 +127,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of databases housed in a server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
 }
 impl azure_core::Continuable for DatabaseListResult {
@@ -168,7 +180,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of firewall rules in a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
 }
 impl azure_core::Continuable for FirewallRuleListResult {
@@ -221,7 +237,11 @@ impl LogFile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogFileListResult {
     #[doc = "The list of log files."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogFile>,
 }
 impl azure_core::Continuable for LogFileListResult {
@@ -426,7 +446,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of resource provider operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationListResult {
@@ -438,7 +462,11 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PerformanceTierListResult {
     #[doc = "The list of performance tiers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PerformanceTierProperties>,
 }
 impl azure_core::Continuable for PerformanceTierListResult {
@@ -477,7 +505,12 @@ pub struct PerformanceTierProperties {
     #[serde(rename = "minStorageMB", default, skip_serializing_if = "Option::is_none")]
     pub min_storage_mb: Option<i32>,
     #[doc = "Service level objectives associated with the performance tier"]
-    #[serde(rename = "serviceLevelObjectives", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceLevelObjectives",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_level_objectives: Vec<PerformanceTierServiceLevelObjectives>,
 }
 impl PerformanceTierProperties {
@@ -650,10 +683,20 @@ pub struct SecurityAlertPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled."]
     pub state: security_alert_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -743,7 +786,11 @@ impl ServerForCreate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "The list of servers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
 }
 impl azure_core::Continuable for ServerListResult {
@@ -1017,7 +1064,11 @@ impl ServerSecurityAlertPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1334,7 +1385,11 @@ impl VirtualNetworkRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkRuleListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkRule>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/mariadb/src/package_2018_06_01_privatepreview/models.rs b/services/mgmt/mariadb/src/package_2018_06_01_privatepreview/models.rs
index ad1269631e..4fe0f613c7 100644
--- a/services/mgmt/mariadb/src/package_2018_06_01_privatepreview/models.rs
+++ b/services/mgmt/mariadb/src/package_2018_06_01_privatepreview/models.rs
@@ -29,7 +29,11 @@ impl AdvisorProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdvisorsResultList {
     #[doc = "The list of recommendation action advisors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Advisor>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -77,7 +81,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -103,7 +111,11 @@ impl Configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
 }
 impl azure_core::Continuable for ConfigurationListResult {
@@ -162,7 +174,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of databases housed in a server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
 }
 impl azure_core::Continuable for DatabaseListResult {
@@ -211,7 +227,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of firewall rules in a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
 }
 impl azure_core::Continuable for FirewallRuleListResult {
@@ -264,7 +284,11 @@ impl LogFile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogFileListResult {
     #[doc = "The list of log files."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogFile>,
 }
 impl azure_core::Continuable for LogFileListResult {
@@ -469,7 +493,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of resource provider operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationListResult {
@@ -481,7 +509,11 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PerformanceTierListResult {
     #[doc = "The list of performance tiers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PerformanceTierProperties>,
 }
 impl azure_core::Continuable for PerformanceTierListResult {
@@ -502,7 +534,12 @@ pub struct PerformanceTierProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Service level objectives associated with the performance tier"]
-    #[serde(rename = "serviceLevelObjectives", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceLevelObjectives",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_level_objectives: Vec<PerformanceTierServiceLevelObjectives>,
 }
 impl PerformanceTierProperties {
@@ -561,7 +598,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -623,7 +664,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -647,7 +692,12 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -715,7 +765,12 @@ pub struct QueryStatisticProperties {
     #[serde(rename = "aggregationFunction", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_function: Option<String>,
     #[doc = "The list of database names."]
-    #[serde(rename = "databaseNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_names: Vec<String>,
     #[doc = "Number of query executions in this time interval."]
     #[serde(rename = "queryExecutionCount", default, skip_serializing_if = "Option::is_none")]
@@ -771,7 +826,11 @@ impl QueryTextProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryTextsResultList {
     #[doc = "The list of query texts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueryText>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -839,7 +898,11 @@ impl RecommendationActionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecommendationActionsResultList {
     #[doc = "The list of recommendation action advisors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecommendationAction>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -954,10 +1017,20 @@ pub struct SecurityAlertPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled."]
     pub state: security_alert_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -1047,7 +1120,11 @@ impl ServerForCreate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "The list of servers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
 }
 impl azure_core::Continuable for ServerListResult {
@@ -1647,7 +1724,11 @@ impl TopQueryStatisticsInputProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopQueryStatisticsResultList {
     #[doc = "The list of top query statistics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueryStatistic>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1702,7 +1783,11 @@ impl VirtualNetworkRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkRuleListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkRule>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1878,7 +1963,11 @@ impl WaitStatisticsInputProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WaitStatisticsResultList {
     #[doc = "The list of wait statistics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WaitStatistic>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/mariadb/src/package_2020_01_01/models.rs b/services/mgmt/mariadb/src/package_2020_01_01/models.rs
index 6d3a7f0628..6a69383144 100644
--- a/services/mgmt/mariadb/src/package_2020_01_01/models.rs
+++ b/services/mgmt/mariadb/src/package_2020_01_01/models.rs
@@ -29,7 +29,11 @@ impl AdvisorProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdvisorsResultList {
     #[doc = "The list of recommendation action advisors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Advisor>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -82,7 +86,11 @@ impl Configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
 }
 impl azure_core::Continuable for ConfigurationListResult {
@@ -141,7 +149,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of databases housed in a server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
 }
 impl azure_core::Continuable for DatabaseListResult {
@@ -198,10 +210,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -229,7 +250,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of firewall rules in a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
 }
 impl azure_core::Continuable for FirewallRuleListResult {
@@ -282,7 +307,11 @@ impl LogFile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogFileListResult {
     #[doc = "The list of log files."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogFile>,
 }
 impl azure_core::Continuable for LogFileListResult {
@@ -487,7 +516,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of resource provider operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationListResult {
@@ -499,7 +532,11 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PerformanceTierListResult {
     #[doc = "The list of performance tiers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PerformanceTierProperties>,
 }
 impl azure_core::Continuable for PerformanceTierListResult {
@@ -538,7 +575,12 @@ pub struct PerformanceTierProperties {
     #[serde(rename = "minStorageMB", default, skip_serializing_if = "Option::is_none")]
     pub min_storage_mb: Option<i32>,
     #[doc = "Service level objectives associated with the performance tier"]
-    #[serde(rename = "serviceLevelObjectives", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceLevelObjectives",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_level_objectives: Vec<PerformanceTierServiceLevelObjectives>,
 }
 impl PerformanceTierProperties {
@@ -597,7 +639,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -659,7 +705,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -683,7 +733,12 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -843,7 +898,12 @@ pub struct QueryStatisticProperties {
     #[serde(rename = "aggregationFunction", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_function: Option<String>,
     #[doc = "The list of database names."]
-    #[serde(rename = "databaseNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_names: Vec<String>,
     #[doc = "Number of query executions in this time interval."]
     #[serde(rename = "queryExecutionCount", default, skip_serializing_if = "Option::is_none")]
@@ -899,7 +959,11 @@ impl QueryTextProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryTextsResultList {
     #[doc = "The list of query texts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueryText>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -967,7 +1031,11 @@ impl RecommendationActionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecommendationActionsResultList {
     #[doc = "The list of recommendation action advisors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecommendationAction>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1067,10 +1135,20 @@ pub struct SecurityAlertPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled."]
     pub state: security_alert_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -1156,7 +1234,11 @@ impl ServerForCreate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "The list of servers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
 }
 impl azure_core::Continuable for ServerListResult {
@@ -1385,7 +1467,12 @@ pub struct ServerProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<PublicNetworkAccess>,
     #[doc = "List of private endpoint connections on a server"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ServerPrivateEndpointConnection>,
 }
 impl ServerProperties {
@@ -1615,7 +1702,11 @@ impl ServerSecurityAlertPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1965,7 +2056,11 @@ impl TopQueryStatisticsInputProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopQueryStatisticsResultList {
     #[doc = "The list of top query statistics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueryStatistic>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2020,7 +2115,11 @@ impl VirtualNetworkRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkRuleListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkRule>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2196,7 +2295,11 @@ impl WaitStatisticsInputProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WaitStatisticsResultList {
     #[doc = "The list of wait statistics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WaitStatistic>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/mariadb/src/package_2020_01_01_privatepreview/models.rs b/services/mgmt/mariadb/src/package_2020_01_01_privatepreview/models.rs
index a4d191dd6c..afbf072e8c 100644
--- a/services/mgmt/mariadb/src/package_2020_01_01_privatepreview/models.rs
+++ b/services/mgmt/mariadb/src/package_2020_01_01_privatepreview/models.rs
@@ -34,7 +34,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -92,7 +96,11 @@ impl ServerKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerKeyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerKey>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/marketplace/src/package_2021_06_01/models.rs b/services/mgmt/marketplace/src/package_2021_06_01/models.rs
index 5c43b5bf41..a78a0ff596 100644
--- a/services/mgmt/marketplace/src/package_2021_06_01/models.rs
+++ b/services/mgmt/marketplace/src/package_2021_06_01/models.rs
@@ -16,10 +16,20 @@ pub struct AcknowledgeOfferNotificationDetails {
     #[serde(rename = "removeOffer", default, skip_serializing_if = "Option::is_none")]
     pub remove_offer: Option<bool>,
     #[doc = "Gets or sets added plans"]
-    #[serde(rename = "addPlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addPlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub add_plans: Vec<String>,
     #[doc = "Gets or sets remove plans"]
-    #[serde(rename = "removePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "removePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub remove_plans: Vec<String>,
 }
 impl AcknowledgeOfferNotificationDetails {
@@ -55,7 +65,12 @@ pub struct AdminRequestApprovalProperties {
     #[serde(rename = "adminAction", default, skip_serializing_if = "Option::is_none")]
     pub admin_action: Option<admin_request_approval_properties::AdminAction>,
     #[doc = "Gets or sets Approved plans ids, empty in case of rejected"]
-    #[serde(rename = "approvedPlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "approvedPlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub approved_plans: Vec<String>,
     #[doc = "Gets or sets admin comment"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -64,10 +79,19 @@ pub struct AdminRequestApprovalProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub administrator: Option<String>,
     #[doc = "Gets list of plans with requesters details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<PlanRequesterDetails>,
     #[doc = "Gets or sets list of associated collection ids"]
-    #[serde(rename = "collectionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collection_ids: Vec<String>,
 }
 impl AdminRequestApprovalProperties {
@@ -118,7 +142,11 @@ pub mod admin_request_approval_properties {
 #[doc = "List of admin request approval resources"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdminRequestApprovalsList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AdminRequestApprovalsResource>,
     #[doc = "URL to get the next set of notifications list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -147,7 +175,12 @@ impl AdminRequestApprovalsResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingAccountsResponse {
     #[doc = "Billing accounts list"]
-    #[serde(rename = "billingAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "billingAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub billing_accounts: Vec<String>,
 }
 impl BillingAccountsResponse {
@@ -159,7 +192,12 @@ impl BillingAccountsResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BulkCollectionsDetails {
     #[doc = "collection ids list that the action is performed on"]
-    #[serde(rename = "collectionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collection_ids: Vec<String>,
     #[doc = "Action to perform (For example: EnableCollections, DisableCollections)"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -186,10 +224,18 @@ impl BulkCollectionsPayload {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BulkCollectionsResponse {
     #[doc = "Succeeded collections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub succeeded: Vec<CollectionsDetails>,
     #[doc = "Failed collections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub failed: Vec<CollectionsDetails>,
 }
 impl BulkCollectionsResponse {
@@ -227,7 +273,12 @@ pub struct CollectionProperties {
     #[serde(rename = "allSubscriptions", default, skip_serializing_if = "Option::is_none")]
     pub all_subscriptions: Option<bool>,
     #[doc = "Gets or sets subscription ids list. Empty list indicates all subscriptions are selected, null indicates no update is done, explicit list indicates the explicit selected subscriptions. On insert, null is considered as bad request"]
-    #[serde(rename = "subscriptionsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions_list: Vec<String>,
     #[doc = "Indicating whether the collection is enabled or disabled."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -258,7 +309,11 @@ impl CollectionsDetails {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CollectionsList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Collection>,
     #[doc = "URL to get the next set of offer list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -285,7 +340,12 @@ impl CollectionsToSubscriptionsMappingPayload {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CollectionsToSubscriptionsMappingProperties {
     #[doc = "Subscriptions ids list"]
-    #[serde(rename = "subscriptionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_ids: Vec<String>,
 }
 impl CollectionsToSubscriptionsMappingProperties {
@@ -409,7 +469,11 @@ pub struct NewNotifications {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub icon: Option<String>,
     #[doc = "Gets or sets removed plans notifications"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<PlanNotificationDetails>,
 }
 impl NewNotifications {
@@ -421,7 +485,11 @@ impl NewNotifications {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationsSettingsProperties {
     #[doc = "Gets or sets list of notified recipients for new requests"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recipients: Vec<Recipient>,
     #[doc = "Gets or sets whether to send email to all marketplace admins for new requests"]
     #[serde(rename = "sendToAllMarketplaceAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -447,7 +515,11 @@ impl Offer {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OfferListResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Offer>,
     #[doc = "URL to get the next set of offer list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -488,7 +560,12 @@ pub struct OfferProperties {
     #[serde(rename = "modifiedAt", default, skip_serializing_if = "Option::is_none")]
     pub modified_at: Option<String>,
     #[doc = "Plan ids limitation for this offer"]
-    #[serde(rename = "specificPlanIdsLimitation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "specificPlanIdsLimitation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub specific_plan_ids_limitation: Vec<String>,
     #[doc = "Indicating whether the offer was not updated to db (true = not updated). If the allow list is identical to the existed one in db, the offer would not be updated."]
     #[serde(rename = "updateSuppressedDueIdempotence", default, skip_serializing_if = "Option::is_none")]
@@ -497,7 +574,11 @@ pub struct OfferProperties {
     #[serde(rename = "iconFileUris", default, skip_serializing_if = "Option::is_none")]
     pub icon_file_uris: Option<serde_json::Value>,
     #[doc = "Offer plans"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<Plan>,
 }
 impl OfferProperties {
@@ -509,7 +590,11 @@ impl OfferProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Microsoft.Marketplace operations supported by the Microsoft.Marketplace resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SingleOperation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -623,7 +708,11 @@ pub struct PlanRequesterDetails {
     #[serde(rename = "planDisplayName", default, skip_serializing_if = "Option::is_none")]
     pub plan_display_name: Option<String>,
     #[doc = "Gets requesters details list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub requesters: Vec<UserRequestDetails>,
 }
 impl PlanRequesterDetails {
@@ -648,7 +737,11 @@ impl PrivateStore {
 #[doc = "Describes the json payload for the list of available private stores (between zero and one, inclusive)"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateStoreList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateStore>,
     #[doc = "URL to get the next set of PrivateStore list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -668,11 +761,26 @@ impl PrivateStoreList {
 #[doc = "Get private store notifications state"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateStoreNotificationsState {
-    #[serde(rename = "stopSellNotifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "stopSellNotifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub stop_sell_notifications: Vec<StopSellNotifications>,
-    #[serde(rename = "newNotifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "newNotifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub new_notifications: Vec<NewNotifications>,
-    #[serde(rename = "approvalRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "approvalRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub approval_requests: Vec<RequestApprovalsDetails>,
 }
 impl PrivateStoreNotificationsState {
@@ -747,7 +855,12 @@ pub struct PrivateStoreProperties {
     #[serde(rename = "isGov", default, skip_serializing_if = "Option::is_none")]
     pub is_gov: Option<bool>,
     #[doc = "Gets list of associated collection ids"]
-    #[serde(rename = "collectionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collection_ids: Vec<String>,
     #[doc = "Gets or sets list of branding characteristics"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -810,7 +923,12 @@ pub struct QueryApprovedPlans {
     #[serde(rename = "offerId", default, skip_serializing_if = "Option::is_none")]
     pub offer_id: Option<String>,
     #[doc = "Offer plan ids"]
-    #[serde(rename = "planIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "planIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plan_ids: Vec<String>,
 }
 impl QueryApprovedPlans {
@@ -825,7 +943,12 @@ pub struct QueryApprovedPlansDetails {
     #[serde(rename = "planId", default, skip_serializing_if = "Option::is_none")]
     pub plan_id: Option<String>,
     #[doc = "Approved subscription ids list. In case all subscriptions are approved for a plan, allSubscriptions flag is true and list is empty ( else flag is set to false). In case both subscriptions list is empty and allSubscriptions flag is false, the plan is not approved for any subscription."]
-    #[serde(rename = "subscriptionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_ids: Vec<String>,
     #[doc = "Indicates whether all subscriptions are approved for this plan"]
     #[serde(rename = "allSubscriptions", default, skip_serializing_if = "Option::is_none")]
@@ -864,7 +987,11 @@ pub type QueryApprovedPlansResponseDetails = Vec<QueryApprovedPlansDetails>;
 #[doc = "List of offers"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryOffers {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OfferProperties>,
     #[doc = "URL to get the next set of PrivateStore list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -939,7 +1066,12 @@ pub struct RequestApprovalProperties {
     #[serde(rename = "publisherId", default, skip_serializing_if = "Option::is_none")]
     pub publisher_id: Option<String>,
     #[doc = "Gets or sets the plans details"]
-    #[serde(rename = "plansDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "plansDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans_details: Vec<PlanDetails>,
     #[doc = "Gets a value indicating whether the request is closed"]
     #[serde(rename = "isClosed", default, skip_serializing_if = "Option::is_none")]
@@ -986,7 +1118,11 @@ pub struct RequestApprovalsDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub icon: Option<String>,
     #[doc = "Gets or sets removed plans notifications"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<PlanNotificationDetails>,
 }
 impl RequestApprovalsDetails {
@@ -997,7 +1133,11 @@ impl RequestApprovalsDetails {
 #[doc = "List of admin request approval resources"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RequestApprovalsList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RequestApprovalResource>,
     #[doc = "URL to get the next set of notifications list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1015,7 +1155,12 @@ pub struct RequestDetails {
     #[serde(rename = "publisherId", default, skip_serializing_if = "Option::is_none")]
     pub publisher_id: Option<String>,
     #[doc = "Current plans list"]
-    #[serde(rename = "planIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "planIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plan_ids: Vec<String>,
     #[doc = "Gets or sets the subscription id"]
     #[serde(rename = "subscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -1114,7 +1259,11 @@ pub struct StopSellNotifications {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub icon: Option<String>,
     #[doc = "Gets or sets removed plans notifications"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<PlanNotificationDetails>,
 }
 impl StopSellNotifications {
@@ -1153,13 +1302,23 @@ impl SystemData {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransferOffersDetails {
     #[doc = "Target collections ids"]
-    #[serde(rename = "targetCollections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetCollections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_collections: Vec<String>,
     #[doc = "Operation to perform (For example: Copy or Move)"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operation: Option<String>,
     #[doc = "Offers ids list to transfer from source collection to target collection(s)"]
-    #[serde(rename = "offerIdsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "offerIdsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub offer_ids_list: Vec<String>,
 }
 impl TransferOffersDetails {
@@ -1183,10 +1342,18 @@ impl TransferOffersProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransferOffersResponse {
     #[doc = "Succeeded collections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub succeeded: Vec<CollectionsDetails>,
     #[doc = "Failed collections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub failed: Vec<CollectionsDetails>,
 }
 impl TransferOffersResponse {
@@ -1252,7 +1419,11 @@ pub struct CollectionsSubscriptionsMappingDetails {
     #[serde(rename = "collectionName", default, skip_serializing_if = "Option::is_none")]
     pub collection_name: Option<String>,
     #[doc = "Subscriptions ids list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
 }
 impl CollectionsSubscriptionsMappingDetails {
diff --git a/services/mgmt/marketplace/src/package_2021_12/models.rs b/services/mgmt/marketplace/src/package_2021_12/models.rs
index 236a280238..b671edb5f8 100644
--- a/services/mgmt/marketplace/src/package_2021_12/models.rs
+++ b/services/mgmt/marketplace/src/package_2021_12/models.rs
@@ -16,10 +16,20 @@ pub struct AcknowledgeOfferNotificationDetails {
     #[serde(rename = "removeOffer", default, skip_serializing_if = "Option::is_none")]
     pub remove_offer: Option<bool>,
     #[doc = "Gets or sets added plans"]
-    #[serde(rename = "addPlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addPlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub add_plans: Vec<String>,
     #[doc = "Gets or sets remove plans"]
-    #[serde(rename = "removePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "removePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub remove_plans: Vec<String>,
 }
 impl AcknowledgeOfferNotificationDetails {
@@ -55,7 +65,12 @@ pub struct AdminRequestApprovalProperties {
     #[serde(rename = "adminAction", default, skip_serializing_if = "Option::is_none")]
     pub admin_action: Option<admin_request_approval_properties::AdminAction>,
     #[doc = "Gets or sets Approved plans ids, empty in case of rejected"]
-    #[serde(rename = "approvedPlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "approvedPlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub approved_plans: Vec<String>,
     #[doc = "Gets or sets admin comment"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -64,10 +79,19 @@ pub struct AdminRequestApprovalProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub administrator: Option<String>,
     #[doc = "Gets list of plans with requesters details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<PlanRequesterDetails>,
     #[doc = "Gets or sets list of associated collection ids"]
-    #[serde(rename = "collectionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collection_ids: Vec<String>,
 }
 impl AdminRequestApprovalProperties {
@@ -118,7 +142,11 @@ pub mod admin_request_approval_properties {
 #[doc = "List of admin request approval resources"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdminRequestApprovalsList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AdminRequestApprovalsResource>,
     #[doc = "URL to get the next set of notifications list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -147,7 +175,12 @@ impl AdminRequestApprovalsResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingAccountsResponse {
     #[doc = "Billing accounts list"]
-    #[serde(rename = "billingAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "billingAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub billing_accounts: Vec<String>,
 }
 impl BillingAccountsResponse {
@@ -159,7 +192,12 @@ impl BillingAccountsResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BulkCollectionsDetails {
     #[doc = "collection ids list that the action is performed on"]
-    #[serde(rename = "collectionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collection_ids: Vec<String>,
     #[doc = "Action to perform (For example: EnableCollections, DisableCollections)"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -186,10 +224,18 @@ impl BulkCollectionsPayload {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BulkCollectionsResponse {
     #[doc = "Succeeded collections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub succeeded: Vec<CollectionsDetails>,
     #[doc = "Failed collections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub failed: Vec<CollectionsDetails>,
 }
 impl BulkCollectionsResponse {
@@ -227,7 +273,12 @@ pub struct CollectionProperties {
     #[serde(rename = "allSubscriptions", default, skip_serializing_if = "Option::is_none")]
     pub all_subscriptions: Option<bool>,
     #[doc = "Gets or sets subscription ids list. Empty list indicates all subscriptions are selected, null indicates no update is done, explicit list indicates the explicit selected subscriptions. On insert, null is considered as bad request"]
-    #[serde(rename = "subscriptionsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions_list: Vec<String>,
     #[doc = "Indicating whether the collection is enabled or disabled."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -258,7 +309,11 @@ impl CollectionsDetails {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CollectionsList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Collection>,
     #[doc = "URL to get the next set of offer list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -285,7 +340,12 @@ impl CollectionsToSubscriptionsMappingPayload {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CollectionsToSubscriptionsMappingProperties {
     #[doc = "Subscriptions ids list"]
-    #[serde(rename = "subscriptionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_ids: Vec<String>,
 }
 impl CollectionsToSubscriptionsMappingProperties {
@@ -409,7 +469,11 @@ pub struct NewNotifications {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub icon: Option<String>,
     #[doc = "Gets or sets removed plans notifications"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<PlanNotificationDetails>,
 }
 impl NewNotifications {
@@ -420,7 +484,12 @@ impl NewNotifications {
 #[doc = "List of all new plans notifications for public offers"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NewPlansNotificationsList {
-    #[serde(rename = "newPlansNotifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "newPlansNotifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub new_plans_notifications: Vec<NewNotifications>,
 }
 impl NewPlansNotificationsList {
@@ -432,7 +501,11 @@ impl NewPlansNotificationsList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationsSettingsProperties {
     #[doc = "Gets or sets list of notified recipients for new requests"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recipients: Vec<Recipient>,
     #[doc = "Gets or sets whether to send email to all marketplace admins for new requests"]
     #[serde(rename = "sendToAllMarketplaceAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -458,7 +531,11 @@ impl Offer {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OfferListResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Offer>,
     #[doc = "URL to get the next set of offer list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -499,7 +576,12 @@ pub struct OfferProperties {
     #[serde(rename = "modifiedAt", default, skip_serializing_if = "Option::is_none")]
     pub modified_at: Option<String>,
     #[doc = "Plan ids limitation for this offer"]
-    #[serde(rename = "specificPlanIdsLimitation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "specificPlanIdsLimitation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub specific_plan_ids_limitation: Vec<String>,
     #[doc = "Indicating whether the offer was not updated to db (true = not updated). If the allow list is identical to the existed one in db, the offer would not be updated."]
     #[serde(rename = "updateSuppressedDueIdempotence", default, skip_serializing_if = "Option::is_none")]
@@ -508,7 +590,11 @@ pub struct OfferProperties {
     #[serde(rename = "iconFileUris", default, skip_serializing_if = "Option::is_none")]
     pub icon_file_uris: Option<serde_json::Value>,
     #[doc = "Offer plans"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<Plan>,
 }
 impl OfferProperties {
@@ -520,7 +606,11 @@ impl OfferProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Microsoft.Marketplace operations supported by the Microsoft.Marketplace resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SingleOperation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -634,7 +724,11 @@ pub struct PlanRequesterDetails {
     #[serde(rename = "planDisplayName", default, skip_serializing_if = "Option::is_none")]
     pub plan_display_name: Option<String>,
     #[doc = "Gets requesters details list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub requesters: Vec<UserRequestDetails>,
 }
 impl PlanRequesterDetails {
@@ -659,7 +753,11 @@ impl PrivateStore {
 #[doc = "Describes the json payload for the list of available private stores (between zero and one, inclusive)"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateStoreList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateStore>,
     #[doc = "URL to get the next set of PrivateStore list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -679,11 +777,26 @@ impl PrivateStoreList {
 #[doc = "Get private store notifications state"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateStoreNotificationsState {
-    #[serde(rename = "stopSellNotifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "stopSellNotifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub stop_sell_notifications: Vec<StopSellNotifications>,
-    #[serde(rename = "newNotifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "newNotifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub new_notifications: Vec<NewNotifications>,
-    #[serde(rename = "approvalRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "approvalRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub approval_requests: Vec<RequestApprovalsDetails>,
 }
 impl PrivateStoreNotificationsState {
@@ -758,7 +871,12 @@ pub struct PrivateStoreProperties {
     #[serde(rename = "isGov", default, skip_serializing_if = "Option::is_none")]
     pub is_gov: Option<bool>,
     #[doc = "Gets list of associated collection ids"]
-    #[serde(rename = "collectionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collection_ids: Vec<String>,
     #[doc = "Gets or sets list of branding characteristics"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -821,7 +939,12 @@ pub struct QueryApprovedPlans {
     #[serde(rename = "offerId", default, skip_serializing_if = "Option::is_none")]
     pub offer_id: Option<String>,
     #[doc = "Offer plan ids"]
-    #[serde(rename = "planIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "planIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plan_ids: Vec<String>,
 }
 impl QueryApprovedPlans {
@@ -836,7 +959,12 @@ pub struct QueryApprovedPlansDetails {
     #[serde(rename = "planId", default, skip_serializing_if = "Option::is_none")]
     pub plan_id: Option<String>,
     #[doc = "Approved subscription ids list. In case all subscriptions are approved for a plan, allSubscriptions flag is true and list is empty ( else flag is set to false). In case both subscriptions list is empty and allSubscriptions flag is false, the plan is not approved for any subscription."]
-    #[serde(rename = "subscriptionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_ids: Vec<String>,
     #[doc = "Indicates whether all subscriptions are approved for this plan"]
     #[serde(rename = "allSubscriptions", default, skip_serializing_if = "Option::is_none")]
@@ -875,7 +1003,11 @@ pub type QueryApprovedPlansResponseDetails = Vec<QueryApprovedPlansDetails>;
 #[doc = "List of offers"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryOffers {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OfferProperties>,
     #[doc = "URL to get the next set of PrivateStore list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -950,7 +1082,12 @@ pub struct RequestApprovalProperties {
     #[serde(rename = "publisherId", default, skip_serializing_if = "Option::is_none")]
     pub publisher_id: Option<String>,
     #[doc = "Gets or sets the plans details"]
-    #[serde(rename = "plansDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "plansDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans_details: Vec<PlanDetails>,
     #[doc = "Gets a value indicating whether the request is closed"]
     #[serde(rename = "isClosed", default, skip_serializing_if = "Option::is_none")]
@@ -997,7 +1134,11 @@ pub struct RequestApprovalsDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub icon: Option<String>,
     #[doc = "Gets or sets removed plans notifications"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<PlanNotificationDetails>,
 }
 impl RequestApprovalsDetails {
@@ -1008,7 +1149,11 @@ impl RequestApprovalsDetails {
 #[doc = "List of admin request approval resources"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RequestApprovalsList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RequestApprovalResource>,
     #[doc = "URL to get the next set of notifications list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1026,7 +1171,12 @@ pub struct RequestDetails {
     #[serde(rename = "publisherId", default, skip_serializing_if = "Option::is_none")]
     pub publisher_id: Option<String>,
     #[doc = "Current plans list"]
-    #[serde(rename = "planIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "planIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plan_ids: Vec<String>,
     #[doc = "Gets or sets the subscription id"]
     #[serde(rename = "subscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -1125,7 +1275,11 @@ pub struct StopSellNotifications {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub icon: Option<String>,
     #[doc = "Gets or sets removed plans notifications"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<PlanNotificationDetails>,
 }
 impl StopSellNotifications {
@@ -1136,7 +1290,12 @@ impl StopSellNotifications {
 #[doc = "List of stop sell offers and plans notifications."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StopSellOffersPlansNotificationsList {
-    #[serde(rename = "stopSellNotifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "stopSellNotifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub stop_sell_notifications: Vec<StopSellOffersPlansNotificationsListProperties>,
 }
 impl StopSellOffersPlansNotificationsList {
@@ -1163,13 +1322,22 @@ pub struct StopSellOffersPlansNotificationsListProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub icon: Option<String>,
     #[doc = "The list of removed plans notifications"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<PlanNotificationDetails>,
     #[doc = "True if the offer has public plans"]
     #[serde(rename = "publicContext", default, skip_serializing_if = "Option::is_none")]
     pub public_context: Option<bool>,
     #[doc = "The subscriptions related to private plans"]
-    #[serde(rename = "subscriptionsIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionsIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions_ids: Vec<String>,
 }
 impl StopSellOffersPlansNotificationsListProperties {
@@ -1180,7 +1348,11 @@ impl StopSellOffersPlansNotificationsListProperties {
 #[doc = "Private plans subscriptions"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StopSellSubscriptions {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
 }
 impl StopSellSubscriptions {
@@ -1258,7 +1430,12 @@ pub mod subscription {
 #[doc = "List of subscription Ids in the private store"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionsContextList {
-    #[serde(rename = "subscriptionsIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionsIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions_ids: Vec<String>,
 }
 impl SubscriptionsContextList {
@@ -1270,7 +1447,11 @@ impl SubscriptionsContextList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionsResponse {
     #[doc = "An array of subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Subscription>,
     #[doc = "The skip token to retrieve the next page."]
     #[serde(rename = "skipToken", default, skip_serializing_if = "Option::is_none")]
@@ -1315,13 +1496,23 @@ impl SystemData {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransferOffersDetails {
     #[doc = "Target collections ids"]
-    #[serde(rename = "targetCollections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetCollections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_collections: Vec<String>,
     #[doc = "Operation to perform (For example: Copy or Move)"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operation: Option<String>,
     #[doc = "Offers ids list to transfer from source collection to target collection(s)"]
-    #[serde(rename = "offerIdsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "offerIdsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub offer_ids_list: Vec<String>,
 }
 impl TransferOffersDetails {
@@ -1345,10 +1536,18 @@ impl TransferOffersProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransferOffersResponse {
     #[doc = "Succeeded collections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub succeeded: Vec<CollectionsDetails>,
     #[doc = "Failed collections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub failed: Vec<CollectionsDetails>,
 }
 impl TransferOffersResponse {
@@ -1414,7 +1613,11 @@ pub struct CollectionsSubscriptionsMappingDetails {
     #[serde(rename = "collectionName", default, skip_serializing_if = "Option::is_none")]
     pub collection_name: Option<String>,
     #[doc = "Subscriptions ids list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
 }
 impl CollectionsSubscriptionsMappingDetails {
diff --git a/services/mgmt/marketplace/src/package_2022_03/models.rs b/services/mgmt/marketplace/src/package_2022_03/models.rs
index 325c8e6bef..c61014e906 100644
--- a/services/mgmt/marketplace/src/package_2022_03/models.rs
+++ b/services/mgmt/marketplace/src/package_2022_03/models.rs
@@ -16,10 +16,20 @@ pub struct AcknowledgeOfferNotificationDetails {
     #[serde(rename = "removeOffer", default, skip_serializing_if = "Option::is_none")]
     pub remove_offer: Option<bool>,
     #[doc = "Gets or sets added plans"]
-    #[serde(rename = "addPlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addPlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub add_plans: Vec<String>,
     #[doc = "Gets or sets remove plans"]
-    #[serde(rename = "removePlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "removePlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub remove_plans: Vec<String>,
 }
 impl AcknowledgeOfferNotificationDetails {
@@ -55,7 +65,12 @@ pub struct AdminRequestApprovalProperties {
     #[serde(rename = "adminAction", default, skip_serializing_if = "Option::is_none")]
     pub admin_action: Option<admin_request_approval_properties::AdminAction>,
     #[doc = "Gets or sets Approved plans ids, empty in case of rejected"]
-    #[serde(rename = "approvedPlans", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "approvedPlans",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub approved_plans: Vec<String>,
     #[doc = "Gets or sets admin comment"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -64,10 +79,19 @@ pub struct AdminRequestApprovalProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub administrator: Option<String>,
     #[doc = "Gets list of plans with requesters details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<PlanRequesterDetails>,
     #[doc = "Gets or sets list of associated collection ids"]
-    #[serde(rename = "collectionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collection_ids: Vec<String>,
     #[doc = "The offer icon url."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -121,7 +145,11 @@ pub mod admin_request_approval_properties {
 #[doc = "List of admin request approval resources"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdminRequestApprovalsList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AdminRequestApprovalsResource>,
     #[doc = "URL to get the next set of notifications list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -162,7 +190,12 @@ impl AnyExistingOffersInTheCollectionsResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingAccountsResponse {
     #[doc = "Billing accounts list"]
-    #[serde(rename = "billingAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "billingAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub billing_accounts: Vec<String>,
 }
 impl BillingAccountsResponse {
@@ -174,7 +207,12 @@ impl BillingAccountsResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BulkCollectionsDetails {
     #[doc = "collection ids list that the action is performed on"]
-    #[serde(rename = "collectionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collection_ids: Vec<String>,
     #[doc = "Action to perform (For example: EnableCollections, DisableCollections)"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -201,10 +239,18 @@ impl BulkCollectionsPayload {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BulkCollectionsResponse {
     #[doc = "Succeeded collections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub succeeded: Vec<CollectionsDetails>,
     #[doc = "Failed collections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub failed: Vec<CollectionsDetails>,
 }
 impl BulkCollectionsResponse {
@@ -248,7 +294,12 @@ pub struct CollectionProperties {
     #[serde(rename = "approveAllItemsModifiedAt", default, with = "azure_core::date::rfc3339::option")]
     pub approve_all_items_modified_at: Option<time::OffsetDateTime>,
     #[doc = "Gets or sets subscription ids list. Empty list indicates all subscriptions are selected, null indicates no update is done, explicit list indicates the explicit selected subscriptions. On insert, null is considered as bad request"]
-    #[serde(rename = "subscriptionsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions_list: Vec<String>,
     #[doc = "Indicating whether the collection is enabled or disabled."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -279,7 +330,11 @@ impl CollectionsDetails {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CollectionsList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Collection>,
     #[doc = "URL to get the next set of offer list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -306,7 +361,12 @@ impl CollectionsToSubscriptionsMappingPayload {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CollectionsToSubscriptionsMappingProperties {
     #[doc = "Subscriptions ids list"]
-    #[serde(rename = "subscriptionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_ids: Vec<String>,
 }
 impl CollectionsToSubscriptionsMappingProperties {
@@ -341,7 +401,12 @@ pub struct ContextAndPlansDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub context: Option<String>,
     #[doc = "List of plan IDs."]
-    #[serde(rename = "planIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "planIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plan_ids: Vec<String>,
 }
 impl ContextAndPlansDetails {
@@ -447,7 +512,12 @@ pub struct MultiContextAndPlansProperties {
     #[doc = "The offer's eTag."]
     #[serde(rename = "eTag", default, skip_serializing_if = "Option::is_none")]
     pub e_tag: Option<String>,
-    #[serde(rename = "plansContext", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "plansContext",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans_context: Vec<ContextAndPlansDetails>,
 }
 impl MultiContextAndPlansProperties {
@@ -474,7 +544,11 @@ pub struct NewNotifications {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub icon: Option<String>,
     #[doc = "Gets or sets removed plans notifications"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<PlanNotificationDetails>,
 }
 impl NewNotifications {
@@ -485,7 +559,12 @@ impl NewNotifications {
 #[doc = "List of all new plans notifications for public offers"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NewPlansNotificationsList {
-    #[serde(rename = "newPlansNotifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "newPlansNotifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub new_plans_notifications: Vec<NewNotifications>,
 }
 impl NewPlansNotificationsList {
@@ -497,7 +576,11 @@ impl NewPlansNotificationsList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationsSettingsProperties {
     #[doc = "Gets or sets list of notified recipients for new requests"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recipients: Vec<Recipient>,
     #[doc = "Gets or sets whether to send email to all marketplace admins for new requests"]
     #[serde(rename = "sendToAllMarketplaceAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -523,7 +606,11 @@ impl Offer {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OfferListResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Offer>,
     #[doc = "URL to get the next set of offer list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -564,7 +651,12 @@ pub struct OfferProperties {
     #[serde(rename = "modifiedAt", default, skip_serializing_if = "Option::is_none")]
     pub modified_at: Option<String>,
     #[doc = "Plan ids limitation for this offer"]
-    #[serde(rename = "specificPlanIdsLimitation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "specificPlanIdsLimitation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub specific_plan_ids_limitation: Vec<String>,
     #[doc = "Indicating whether the offer was not updated to db (true = not updated). If the allow list is identical to the existed one in db, the offer would not be updated."]
     #[serde(rename = "updateSuppressedDueIdempotence", default, skip_serializing_if = "Option::is_none")]
@@ -573,7 +665,11 @@ pub struct OfferProperties {
     #[serde(rename = "iconFileUris", default, skip_serializing_if = "Option::is_none")]
     pub icon_file_uris: Option<serde_json::Value>,
     #[doc = "Offer plans"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<Plan>,
 }
 impl OfferProperties {
@@ -585,7 +681,11 @@ impl OfferProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Microsoft.Marketplace operations supported by the Microsoft.Marketplace resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SingleOperation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -699,7 +799,11 @@ pub struct PlanRequesterDetails {
     #[serde(rename = "planDisplayName", default, skip_serializing_if = "Option::is_none")]
     pub plan_display_name: Option<String>,
     #[doc = "Gets requesters details list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub requesters: Vec<UserRequestDetails>,
 }
 impl PlanRequesterDetails {
@@ -724,7 +828,11 @@ impl PrivateStore {
 #[doc = "Describes the json payload for the list of available private stores (between zero and one, inclusive)"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateStoreList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateStore>,
     #[doc = "URL to get the next set of PrivateStore list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -744,11 +852,26 @@ impl PrivateStoreList {
 #[doc = "Get private store notifications state"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateStoreNotificationsState {
-    #[serde(rename = "stopSellNotifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "stopSellNotifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub stop_sell_notifications: Vec<StopSellNotifications>,
-    #[serde(rename = "newNotifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "newNotifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub new_notifications: Vec<NewNotifications>,
-    #[serde(rename = "approvalRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "approvalRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub approval_requests: Vec<RequestApprovalsDetails>,
 }
 impl PrivateStoreNotificationsState {
@@ -823,7 +946,12 @@ pub struct PrivateStoreProperties {
     #[serde(rename = "isGov", default, skip_serializing_if = "Option::is_none")]
     pub is_gov: Option<bool>,
     #[doc = "Gets list of associated collection ids"]
-    #[serde(rename = "collectionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collection_ids: Vec<String>,
     #[doc = "Gets or sets list of branding characteristics"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -886,10 +1014,20 @@ pub struct QueryApprovedPlans {
     #[serde(rename = "offerId", default, skip_serializing_if = "Option::is_none")]
     pub offer_id: Option<String>,
     #[doc = "Offer plan ids"]
-    #[serde(rename = "planIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "planIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plan_ids: Vec<String>,
     #[doc = "List of subscription IDs"]
-    #[serde(rename = "subscriptionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_ids: Vec<String>,
 }
 impl QueryApprovedPlans {
@@ -904,7 +1042,12 @@ pub struct QueryApprovedPlansDetails {
     #[serde(rename = "planId", default, skip_serializing_if = "Option::is_none")]
     pub plan_id: Option<String>,
     #[doc = "Approved subscription ids list. In case all subscriptions are approved for a plan, allSubscriptions flag is true and list is empty ( else flag is set to false). In case both subscriptions list is empty and allSubscriptions flag is false, the plan is not approved for any subscription."]
-    #[serde(rename = "subscriptionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_ids: Vec<String>,
     #[doc = "Indicates whether all subscriptions are approved for this plan"]
     #[serde(rename = "allSubscriptions", default, skip_serializing_if = "Option::is_none")]
@@ -943,7 +1086,11 @@ pub type QueryApprovedPlansResponseDetails = Vec<QueryApprovedPlansDetails>;
 #[doc = "List of offers"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryOffers {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OfferProperties>,
     #[doc = "URL to get the next set of PrivateStore list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -991,10 +1138,20 @@ impl QueryRequestApprovalProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryUserOffersDetails {
     #[doc = "List of offer IDs"]
-    #[serde(rename = "offerIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "offerIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub offer_ids: Vec<String>,
     #[doc = "List of subscription IDs"]
-    #[serde(rename = "subscriptionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_ids: Vec<String>,
 }
 impl QueryUserOffersDetails {
@@ -1045,7 +1202,12 @@ pub struct RequestApprovalProperties {
     #[serde(rename = "publisherId", default, skip_serializing_if = "Option::is_none")]
     pub publisher_id: Option<String>,
     #[doc = "Gets or sets the plans details"]
-    #[serde(rename = "plansDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "plansDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans_details: Vec<PlanDetails>,
     #[doc = "Gets a value indicating whether the request is closed"]
     #[serde(rename = "isClosed", default, skip_serializing_if = "Option::is_none")]
@@ -1092,7 +1254,11 @@ pub struct RequestApprovalsDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub icon: Option<String>,
     #[doc = "Gets or sets removed plans notifications"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<PlanNotificationDetails>,
 }
 impl RequestApprovalsDetails {
@@ -1103,7 +1269,11 @@ impl RequestApprovalsDetails {
 #[doc = "List of admin request approval resources"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RequestApprovalsList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RequestApprovalResource>,
     #[doc = "URL to get the next set of notifications list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1121,7 +1291,12 @@ pub struct RequestDetails {
     #[serde(rename = "publisherId", default, skip_serializing_if = "Option::is_none")]
     pub publisher_id: Option<String>,
     #[doc = "Current plans list"]
-    #[serde(rename = "planIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "planIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plan_ids: Vec<String>,
     #[doc = "Gets or sets the subscription id"]
     #[serde(rename = "subscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -1223,7 +1398,11 @@ pub struct StopSellNotifications {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub icon: Option<String>,
     #[doc = "Gets or sets removed plans notifications"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<PlanNotificationDetails>,
 }
 impl StopSellNotifications {
@@ -1234,7 +1413,12 @@ impl StopSellNotifications {
 #[doc = "List of stop sell offers and plans notifications."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StopSellOffersPlansNotificationsList {
-    #[serde(rename = "stopSellNotifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "stopSellNotifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub stop_sell_notifications: Vec<StopSellOffersPlansNotificationsListProperties>,
 }
 impl StopSellOffersPlansNotificationsList {
@@ -1261,13 +1445,22 @@ pub struct StopSellOffersPlansNotificationsListProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub icon: Option<String>,
     #[doc = "The list of removed plans notifications"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<PlanNotificationDetails>,
     #[doc = "True if the offer has public plans"]
     #[serde(rename = "publicContext", default, skip_serializing_if = "Option::is_none")]
     pub public_context: Option<bool>,
     #[doc = "The subscriptions related to private plans"]
-    #[serde(rename = "subscriptionsIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionsIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions_ids: Vec<String>,
 }
 impl StopSellOffersPlansNotificationsListProperties {
@@ -1278,7 +1471,11 @@ impl StopSellOffersPlansNotificationsListProperties {
 #[doc = "Private plans subscriptions"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StopSellSubscriptions {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
 }
 impl StopSellSubscriptions {
@@ -1356,7 +1553,12 @@ pub mod subscription {
 #[doc = "List of subscription Ids in the private store"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionsContextList {
-    #[serde(rename = "subscriptionsIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionsIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions_ids: Vec<String>,
 }
 impl SubscriptionsContextList {
@@ -1368,7 +1570,11 @@ impl SubscriptionsContextList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionsResponse {
     #[doc = "An array of subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Subscription>,
     #[doc = "The skip token to retrieve the next page."]
     #[serde(rename = "skipToken", default, skip_serializing_if = "Option::is_none")]
@@ -1413,13 +1619,23 @@ impl SystemData {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransferOffersDetails {
     #[doc = "Target collections ids"]
-    #[serde(rename = "targetCollections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetCollections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_collections: Vec<String>,
     #[doc = "Operation to perform (For example: Copy or Move)"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operation: Option<String>,
     #[doc = "Offers ids list to transfer from source collection to target collection(s)"]
-    #[serde(rename = "offerIdsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "offerIdsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub offer_ids_list: Vec<String>,
 }
 impl TransferOffersDetails {
@@ -1443,10 +1659,18 @@ impl TransferOffersProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransferOffersResponse {
     #[doc = "Succeeded collections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub succeeded: Vec<CollectionsDetails>,
     #[doc = "Failed collections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub failed: Vec<CollectionsDetails>,
 }
 impl TransferOffersResponse {
@@ -1512,7 +1736,11 @@ pub struct CollectionsSubscriptionsMappingDetails {
     #[serde(rename = "collectionName", default, skip_serializing_if = "Option::is_none")]
     pub collection_name: Option<String>,
     #[doc = "Subscriptions ids list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
 }
 impl CollectionsSubscriptionsMappingDetails {
diff --git a/services/mgmt/marketplacecatalog/src/package_2022_02_02/models.rs b/services/mgmt/marketplacecatalog/src/package_2022_02_02/models.rs
index dcd5a10292..496b64a517 100644
--- a/services/mgmt/marketplacecatalog/src/package_2022_02_02/models.rs
+++ b/services/mgmt/marketplacecatalog/src/package_2022_02_02/models.rs
@@ -31,10 +31,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -70,7 +79,12 @@ impl FacetValueDto {
 pub struct FacetsItemDto {
     #[serde(rename = "facetName", default, skip_serializing_if = "Option::is_none")]
     pub facet_name: Option<String>,
-    #[serde(rename = "facetValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "facetValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub facet_values: Vec<FacetValueDto>,
 }
 impl FacetsItemDto {
@@ -80,7 +94,11 @@ impl FacetsItemDto {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FacetsResponseDto {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub facets: Vec<FacetsItemDto>,
 }
 impl FacetsResponseDto {
@@ -231,7 +249,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -360,27 +382,67 @@ pub struct SearchItemDto {
     pub amp_apps_popularity: Option<f64>,
     #[serde(rename = "ampCsPopularity", default, skip_serializing_if = "Option::is_none")]
     pub amp_cs_popularity: Option<f64>,
-    #[serde(rename = "applicableProducts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicableProducts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applicable_products: Vec<String>,
     #[serde(rename = "appSourceAppsPopularity", default, skip_serializing_if = "Option::is_none")]
     pub app_source_apps_popularity: Option<f64>,
-    #[serde(rename = "appSourceCategories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appSourceCategories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_source_categories: Vec<String>,
     #[serde(rename = "appSourceCsPopularity", default, skip_serializing_if = "Option::is_none")]
     pub app_source_cs_popularity: Option<f64>,
-    #[serde(rename = "appSourceIndustries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appSourceIndustries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_source_industries: Vec<String>,
-    #[serde(rename = "azureCategories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureCategories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_categories: Vec<String>,
-    #[serde(rename = "azurePortalCategories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azurePortalCategories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_portal_categories: Vec<String>,
-    #[serde(rename = "azureIndustries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureIndustries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_industries: Vec<String>,
     #[serde(rename = "bigId", default, skip_serializing_if = "Option::is_none")]
     pub big_id: Option<String>,
-    #[serde(rename = "cspStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cspStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub csp_states: Vec<String>,
-    #[serde(rename = "determinedStorefronts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "determinedStorefronts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub determined_storefronts: Vec<String>,
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
@@ -406,21 +468,50 @@ pub struct SearchItemDto {
     pub legacy_id: Option<String>,
     #[serde(rename = "offerType", default, skip_serializing_if = "Option::is_none")]
     pub offer_type: Option<String>,
-    #[serde(rename = "operatingSystems", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "operatingSystems",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operating_systems: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<PlanDto>,
-    #[serde(rename = "pricingTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pricingTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pricing_types: Vec<String>,
     #[serde(rename = "publisherDisplayName", default, skip_serializing_if = "Option::is_none")]
     pub publisher_display_name: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub summary: Option<String>,
-    #[serde(rename = "vmGenerations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmGenerations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_generations: Vec<String>,
-    #[serde(rename = "vmImageTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmImageTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_image_types: Vec<String>,
-    #[serde(rename = "vmSecurityTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSecurityTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_security_types: Vec<String>,
     #[serde(rename = "smallIconUri", default, skip_serializing_if = "Option::is_none")]
     pub small_icon_uri: Option<String>,
@@ -466,29 +557,87 @@ pub struct SearchRequest {
     pub is_industry_cloud: Option<bool>,
     pub languages: Vec<String>,
     pub stores: Vec<Store>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub select: Vec<String>,
-    #[serde(rename = "sortBy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sortBy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sort_by: Vec<String>,
-    #[serde(rename = "offerTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "offerTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub offer_types: Vec<String>,
-    #[serde(rename = "pricingTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pricingTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pricing_types: Vec<PricingType>,
-    #[serde(rename = "privateStoreAllowances", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateStoreAllowances",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_store_allowances: Vec<PrivateStoreAllow>,
-    #[serde(rename = "appSourceIndustries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appSourceIndustries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_source_industries: Vec<String>,
-    #[serde(rename = "operatingSystems", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "operatingSystems",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operating_systems: Vec<String>,
-    #[serde(rename = "appSourceCategories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appSourceCategories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_source_categories: Vec<String>,
-    #[serde(rename = "azureIndustries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureIndustries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_industries: Vec<String>,
-    #[serde(rename = "azureCategories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureCategories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_categories: Vec<String>,
-    #[serde(rename = "azurePortalCategories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azurePortalCategories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_portal_categories: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub facets: Vec<String>,
 }
 impl SearchRequest {
@@ -525,9 +674,17 @@ impl SearchRequest {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SearchResponseDto {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub facets: Vec<FacetsItemDto>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub results: Vec<SearchItemDto>,
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
     pub total_count: Option<i64>,
diff --git a/services/mgmt/marketplacenotifications/src/package_2021_03_03/models.rs b/services/mgmt/marketplacenotifications/src/package_2021_03_03/models.rs
index 0ff2a9e943..aa0b04269a 100644
--- a/services/mgmt/marketplacenotifications/src/package_2021_03_03/models.rs
+++ b/services/mgmt/marketplacenotifications/src/package_2021_03_03/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -94,7 +98,11 @@ impl Notification {
 #[doc = "Notifications List"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Notification>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/marketplacenotifications/src/package_composite_v1/models.rs b/services/mgmt/marketplacenotifications/src/package_composite_v1/models.rs
index 0ff2a9e943..aa0b04269a 100644
--- a/services/mgmt/marketplacenotifications/src/package_composite_v1/models.rs
+++ b/services/mgmt/marketplacenotifications/src/package_composite_v1/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -94,7 +98,11 @@ impl Notification {
 #[doc = "Notifications List"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Notification>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/marketplaceordering/src/package_2015_06_01/models.rs b/services/mgmt/marketplaceordering/src/package_2015_06_01/models.rs
index 270d0c6aab..ad4d19ab61 100644
--- a/services/mgmt/marketplaceordering/src/package_2015_06_01/models.rs
+++ b/services/mgmt/marketplaceordering/src/package_2015_06_01/models.rs
@@ -54,7 +54,11 @@ impl AgreementTerms {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgreementTermsList {
     #[doc = "The value of the array."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OldAgreementTerms>,
 }
 impl AgreementTermsList {
@@ -222,7 +226,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Microsoft.MarketplaceOrdering operations supported by the Microsoft.MarketplaceOrdering resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/marketplaceordering/src/package_2021_01_01/models.rs b/services/mgmt/marketplaceordering/src/package_2021_01_01/models.rs
index f06bd5acc7..43e3de8e05 100644
--- a/services/mgmt/marketplaceordering/src/package_2021_01_01/models.rs
+++ b/services/mgmt/marketplaceordering/src/package_2021_01_01/models.rs
@@ -135,7 +135,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Microsoft.MarketplaceOrdering operations supported by the Microsoft.MarketplaceOrdering resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/mediaservices/src/package_2020_05/models.rs b/services/mgmt/mediaservices/src/package_2020_05/models.rs
index e49da290a7..93567ff75c 100644
--- a/services/mgmt/mediaservices/src/package_2020_05/models.rs
+++ b/services/mgmt/mediaservices/src/package_2020_05/models.rs
@@ -149,7 +149,11 @@ impl AccountFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountFilterCollection {
     #[doc = "A collection of AccountFilter items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccountFilter>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -173,6 +177,7 @@ pub struct AkamaiAccessControl {
     #[serde(
         rename = "akamaiSignatureHeaderAuthenticationKeyList",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub akamai_signature_header_authentication_key_list: Vec<AkamaiSignatureHeaderAuthenticationKey>,
@@ -239,7 +244,11 @@ impl Asset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetCollection {
     #[doc = "A collection of Asset items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Asset>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -260,7 +269,12 @@ impl AssetCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetContainerSas {
     #[doc = "The list of Asset container SAS URLs."]
-    #[serde(rename = "assetContainerSasUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assetContainerSasUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub asset_container_sas_urls: Vec<String>,
 }
 impl AssetContainerSas {
@@ -311,7 +325,11 @@ impl AssetFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetFilterCollection {
     #[doc = "A collection of AssetFilter items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AssetFilter>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -775,7 +793,12 @@ pub struct CommonEncryptionCbcs {
     #[serde(rename = "enabledProtocols", default, skip_serializing_if = "Option::is_none")]
     pub enabled_protocols: Option<EnabledProtocols>,
     #[doc = "Representing which tracks should not be encrypted"]
-    #[serde(rename = "clearTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clearTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_tracks: Vec<TrackSelection>,
     #[doc = "Class to specify properties of all content keys in Streaming Policy"]
     #[serde(rename = "contentKeys", default, skip_serializing_if = "Option::is_none")]
@@ -796,7 +819,12 @@ pub struct CommonEncryptionCenc {
     #[serde(rename = "enabledProtocols", default, skip_serializing_if = "Option::is_none")]
     pub enabled_protocols: Option<EnabledProtocols>,
     #[doc = "Representing which tracks should not be encrypted"]
-    #[serde(rename = "clearTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clearTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_tracks: Vec<TrackSelection>,
     #[doc = "Class to specify properties of all content keys in Streaming Policy"]
     #[serde(rename = "contentKeys", default, skip_serializing_if = "Option::is_none")]
@@ -844,7 +872,11 @@ impl ContentKeyPolicyClearKeyConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContentKeyPolicyCollection {
     #[doc = "A collection of ContentKeyPolicy items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContentKeyPolicy>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1467,10 +1499,20 @@ pub struct ContentKeyPolicyTokenRestriction {
     #[serde(rename = "primaryVerificationKey")]
     pub primary_verification_key: ContentKeyPolicyRestrictionTokenKey,
     #[doc = "A list of alternative verification keys."]
-    #[serde(rename = "alternateVerificationKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateVerificationKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_verification_keys: Vec<ContentKeyPolicyRestrictionTokenKey>,
     #[doc = "A list of required token claims."]
-    #[serde(rename = "requiredClaims", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredClaims",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_claims: Vec<ContentKeyPolicyTokenClaim>,
     #[doc = "The type of token."]
     #[serde(rename = "restrictionTokenType")]
@@ -1845,7 +1887,12 @@ pub struct EnvelopeEncryption {
     #[serde(rename = "enabledProtocols", default, skip_serializing_if = "Option::is_none")]
     pub enabled_protocols: Option<EnabledProtocols>,
     #[doc = "Representing which tracks should not be encrypted"]
-    #[serde(rename = "clearTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clearTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_tracks: Vec<TrackSelection>,
     #[doc = "Class to specify properties of all content keys in Streaming Policy"]
     #[serde(rename = "contentKeys", default, skip_serializing_if = "Option::is_none")]
@@ -2144,7 +2191,11 @@ pub struct Filters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub crop: Option<Rectangle>,
     #[doc = "The properties of overlays to be applied to the input video. These could be audio, image or video overlays."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub overlays: Vec<Overlay>,
 }
 impl Filters {
@@ -2381,7 +2432,11 @@ pub struct H264Video {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub complexity: Option<h264_video::Complexity>,
     #[doc = "The collection of output H.264 layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<H264Layer>,
 }
 impl H264Video {
@@ -2517,7 +2572,11 @@ pub struct H265Video {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub complexity: Option<h265_video::Complexity>,
     #[doc = "The collection of output H.265 layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<H265Layer>,
 }
 impl H265Video {
@@ -2624,7 +2683,11 @@ impl Hls {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IpAccessControl {
     #[doc = "The IP allow list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allow: Vec<IpRange>,
 }
 impl IpAccessControl {
@@ -2692,7 +2755,12 @@ pub struct InputDefinition {
     #[serde(rename = "@odata.type")]
     pub odata_type: String,
     #[doc = "The list of TrackDescriptors which define the metadata and selection of tracks in the input."]
-    #[serde(rename = "includedTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_tracks: Vec<TrackDescriptor>,
 }
 impl InputDefinition {
@@ -2741,7 +2809,11 @@ impl Job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCollection {
     #[doc = "A collection of Job items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2774,7 +2846,11 @@ pub struct JobError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub retry: Option<job_error::Retry>,
     #[doc = "An array of details about specific errors that led to this reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<JobErrorDetail>,
 }
 impl JobError {
@@ -2966,7 +3042,11 @@ pub struct JobInputClip {
     #[serde(flatten)]
     pub job_input: JobInput,
     #[doc = "List of files. Required for JobInputHttp. Maximum of 4000 characters each."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<String>,
     #[doc = "Base class for specifying a clip time. Use sub classes of this class to specify the time position in the media."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2978,7 +3058,12 @@ pub struct JobInputClip {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Defines a list of InputDefinitions. For each InputDefinition, it defines a list of track selections and related metadata."]
-    #[serde(rename = "inputDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputDefinitions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_definitions: Vec<InputDefinition>,
 }
 impl JobInputClip {
@@ -3016,7 +3101,11 @@ pub struct JobInputSequence {
     #[serde(flatten)]
     pub job_input: JobInput,
     #[doc = "JobInputs that make up the timeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<JobInputClip>,
 }
 impl JobInputSequence {
@@ -3033,7 +3122,11 @@ pub struct JobInputs {
     #[serde(flatten)]
     pub job_input: JobInput,
     #[doc = "List of inputs to a Job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<JobInput>,
 }
 impl JobInputs {
@@ -3300,7 +3393,11 @@ pub struct JpgImage {
     #[serde(flatten)]
     pub image: Image,
     #[doc = "A collection of output JPEG image layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<JpgLayer>,
     #[doc = "Sets the number of columns used in thumbnail sprite image.  The number of rows are automatically calculated and a VTT file is generated with the coordinate mappings for each thumbnail in the sprite. Note: this value should be a positive integer and a proper value is recommended so that the output image resolution will not go beyond JPEG maximum pixel resolution limit 65535x65535."]
     #[serde(rename = "spriteColumn", default, skip_serializing_if = "Option::is_none")]
@@ -3430,7 +3527,12 @@ pub mod list_container_sas_input {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListContentKeysResponse {
     #[doc = "ContentKeys used by current Streaming Locator"]
-    #[serde(rename = "contentKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_keys: Vec<StreamingLocatorContentKey>,
 }
 impl ListContentKeysResponse {
@@ -3453,10 +3555,20 @@ impl ListEdgePoliciesInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPathsResponse {
     #[doc = "Streaming Paths supported by current Streaming Locator"]
-    #[serde(rename = "streamingPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "streamingPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub streaming_paths: Vec<StreamingPath>,
     #[doc = "Download Paths supported by current Streaming Locator"]
-    #[serde(rename = "downloadPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "downloadPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub download_paths: Vec<String>,
 }
 impl ListPathsResponse {
@@ -3468,7 +3580,12 @@ impl ListPathsResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListStreamingLocatorsResponse {
     #[doc = "The list of Streaming Locators."]
-    #[serde(rename = "streamingLocators", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "streamingLocators",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub streaming_locators: Vec<AssetStreamingLocator>,
 }
 impl ListStreamingLocatorsResponse {
@@ -3642,7 +3759,11 @@ pub struct LiveEventInput {
     #[serde(rename = "accessToken", default, skip_serializing_if = "Option::is_none")]
     pub access_token: Option<String>,
     #[doc = "The input endpoints for the live event."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<LiveEventEndpoint>,
 }
 impl LiveEventInput {
@@ -3732,7 +3853,11 @@ impl LiveEventInputTrackSelection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LiveEventListResult {
     #[doc = "The result of the List Live Event operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LiveEvent>,
     #[doc = "The number of result."]
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
@@ -3768,7 +3893,11 @@ impl LiveEventOutputTranscriptionTrack {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LiveEventPreview {
     #[doc = "The endpoints for preview. Do not share the preview URL with the live event audience."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<LiveEventEndpoint>,
     #[doc = "The IP access control for the live event preview endpoint."]
     #[serde(rename = "accessControl", default, skip_serializing_if = "Option::is_none")]
@@ -3815,7 +3944,11 @@ pub struct LiveEventProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encoding: Option<LiveEventEncoding>,
     #[doc = "Live transcription settings for the live event. See https://go.microsoft.com/fwlink/?linkid=2133742 for more information about the live transcription feature."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transcriptions: Vec<LiveEventTranscription>,
     #[doc = "The provisioning state of the live event."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3833,7 +3966,12 @@ pub struct LiveEventProperties {
     #[serde(rename = "hostnamePrefix", default, skip_serializing_if = "Option::is_none")]
     pub hostname_prefix: Option<String>,
     #[doc = "The options to use for the LiveEvent. This value is specified at creation time and cannot be updated. The valid values for the array entry values are 'Default' and 'LowLatency'."]
-    #[serde(rename = "streamOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "streamOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub stream_options: Vec<String>,
     #[doc = "The creation time for the live event"]
     #[serde(default, with = "azure_core::date::rfc3339::option")]
@@ -3918,7 +4056,12 @@ pub struct LiveEventTranscription {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub language: Option<String>,
     #[doc = "Provides a mechanism to select the audio track in the input live feed, to which speech-to-text transcription is applied. This property is reserved for future use, any value set on this property will be ignored."]
-    #[serde(rename = "inputTrackSelection", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputTrackSelection",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_track_selection: Vec<LiveEventInputTrackSelection>,
     #[doc = "Describes a transcription track in the output of a live event, generated using speech-to-text transcription. This property is reserved for future use, any value set on this property will be ignored."]
     #[serde(rename = "outputTranscriptionTrack", default, skip_serializing_if = "Option::is_none")]
@@ -3947,7 +4090,11 @@ impl LiveOutput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LiveOutputListResult {
     #[doc = "The result of the List LiveOutput operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LiveOutput>,
     #[doc = "The number of result."]
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
@@ -4096,7 +4243,11 @@ pub struct MediaFilterProperties {
     #[serde(rename = "firstQuality", default, skip_serializing_if = "Option::is_none")]
     pub first_quality: Option<FirstQuality>,
     #[doc = "The tracks selection conditions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tracks: Vec<FilterTrackSelection>,
 }
 impl MediaFilterProperties {
@@ -4132,7 +4283,11 @@ impl MediaService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MediaServiceCollection {
     #[doc = "A collection of MediaService items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MediaService>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4217,7 +4372,12 @@ pub struct MediaServiceProperties {
     #[serde(rename = "mediaServiceId", default, skip_serializing_if = "Option::is_none")]
     pub media_service_id: Option<String>,
     #[doc = "The storage accounts for this resource."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<StorageAccount>,
     #[serde(rename = "storageAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub storage_authentication: Option<media_service_properties::StorageAuthentication>,
@@ -4308,10 +4468,19 @@ pub struct MetricSpecification {
     #[serde(rename = "lockAggregationType", default, skip_serializing_if = "Option::is_none")]
     pub lock_aggregation_type: Option<metric_specification::LockAggregationType>,
     #[doc = "Supported aggregation types."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The metric dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
 }
 impl MetricSpecification {
@@ -4456,7 +4625,12 @@ pub struct MultiBitrateFormat {
     #[serde(flatten)]
     pub format: Format,
     #[doc = "The list of output files to produce.  Each entry in the list is a set of audio and video layer labels to be muxed together ."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
 }
 impl MultiBitrateFormat {
@@ -4492,7 +4666,11 @@ pub struct ODataError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ODataError>,
 }
 impl ODataError {
@@ -4529,7 +4707,11 @@ impl Operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationCollection {
     #[doc = "A collection of Operation items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4633,7 +4815,11 @@ pub struct PngImage {
     #[serde(flatten)]
     pub image: Image,
     #[doc = "A collection of output PNG image layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<PngLayer>,
 }
 impl PngImage {
@@ -4721,7 +4907,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -4849,7 +5039,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -4864,10 +5058,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -5221,10 +5425,20 @@ impl SelectVideoTrackById {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "List of log specifications."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "List of metric specifications."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -5317,7 +5531,12 @@ pub struct StorageEncryptedAssetDecryptionData {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub key: Option<String>,
     #[doc = "Asset File encryption metadata."]
-    #[serde(rename = "assetFileEncryptionMetadata", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assetFileEncryptionMetadata",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub asset_file_encryption_metadata: Vec<AssetFileEncryptionMetadata>,
 }
 impl StorageEncryptedAssetDecryptionData {
@@ -5365,7 +5584,11 @@ impl StreamingEndpointAccessControl {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingEndpointListResult {
     #[doc = "The result of the List StreamingEndpoint operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingEndpoint>,
     #[doc = "The number of result."]
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
@@ -5404,7 +5627,12 @@ pub struct StreamingEndpointProperties {
     #[serde(rename = "maxCacheAge", default, skip_serializing_if = "Option::is_none")]
     pub max_cache_age: Option<i64>,
     #[doc = "The custom host names of the streaming endpoint"]
-    #[serde(rename = "customHostNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customHostNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_host_names: Vec<String>,
     #[doc = "The streaming endpoint host name."]
     #[serde(rename = "hostName", default, skip_serializing_if = "Option::is_none")]
@@ -5540,7 +5768,11 @@ impl StreamingLocator {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingLocatorCollection {
     #[doc = "A collection of StreamingLocator items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingLocator>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5575,7 +5807,11 @@ pub struct StreamingLocatorContentKey {
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
     pub policy_name: Option<String>,
     #[doc = "Tracks which use this Content Key"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tracks: Vec<TrackSelection>,
 }
 impl StreamingLocatorContentKey {
@@ -5657,13 +5893,22 @@ pub struct StreamingLocatorProperties {
     #[serde(rename = "defaultContentKeyPolicyName", default, skip_serializing_if = "Option::is_none")]
     pub default_content_key_policy_name: Option<String>,
     #[doc = "The ContentKeys used by this Streaming Locator."]
-    #[serde(rename = "contentKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_keys: Vec<StreamingLocatorContentKey>,
     #[doc = "Alternative Media ID of this Streaming Locator"]
     #[serde(rename = "alternativeMediaId", default, skip_serializing_if = "Option::is_none")]
     pub alternative_media_id: Option<String>,
     #[doc = "A list of asset or account filters which apply to this streaming locator"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<String>,
 }
 impl StreamingLocatorProperties {
@@ -5692,7 +5937,11 @@ pub struct StreamingPath {
     #[serde(rename = "encryptionScheme")]
     pub encryption_scheme: streaming_path::EncryptionScheme,
     #[doc = "Streaming paths for each protocol and encryptionScheme pair"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<String>,
 }
 impl StreamingPath {
@@ -5810,7 +6059,11 @@ impl StreamingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingPolicyCollection {
     #[doc = "A collection of StreamingPolicy items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingPolicy>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5837,7 +6090,11 @@ pub struct StreamingPolicyContentKey {
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
     pub policy_name: Option<String>,
     #[doc = "Tracks which use this content key"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tracks: Vec<TrackSelection>,
 }
 impl StreamingPolicyContentKey {
@@ -5852,7 +6109,12 @@ pub struct StreamingPolicyContentKeys {
     #[serde(rename = "defaultKey", default, skip_serializing_if = "Option::is_none")]
     pub default_key: Option<DefaultKey>,
     #[doc = "Representing tracks needs separate content key"]
-    #[serde(rename = "keyToTrackMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyToTrackMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_to_track_mappings: Vec<StreamingPolicyContentKey>,
 }
 impl StreamingPolicyContentKeys {
@@ -6058,7 +6320,12 @@ pub mod track_property_condition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrackSelection {
     #[doc = "TrackSelections is a track property condition list which can specify track(s)"]
-    #[serde(rename = "trackSelections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trackSelections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub track_selections: Vec<TrackPropertyCondition>,
 }
 impl TrackSelection {
@@ -6107,7 +6374,11 @@ impl Transform {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransformCollection {
     #[doc = "A collection of Transform items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Transform>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/mediaservices/src/package_2021_05/models.rs b/services/mgmt/mediaservices/src/package_2021_05/models.rs
index 545879cc8e..33de94b402 100644
--- a/services/mgmt/mediaservices/src/package_2021_05/models.rs
+++ b/services/mgmt/mediaservices/src/package_2021_05/models.rs
@@ -78,7 +78,12 @@ pub struct AccessControl {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<access_control::DefaultAction>,
     #[doc = "The IP allow list for access control in Key Delivery. If the default action is set to 'Allow', the IP allow list must be empty."]
-    #[serde(rename = "ipAllowList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAllowList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_allow_list: Vec<String>,
 }
 impl AccessControl {
@@ -203,7 +208,11 @@ impl AccountFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountFilterCollection {
     #[doc = "A collection of AccountFilter items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccountFilter>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -227,6 +236,7 @@ pub struct AkamaiAccessControl {
     #[serde(
         rename = "akamaiSignatureHeaderAuthenticationKeyList",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub akamai_signature_header_authentication_key_list: Vec<AkamaiSignatureHeaderAuthenticationKey>,
@@ -293,7 +303,11 @@ impl Asset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetCollection {
     #[doc = "A collection of Asset items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Asset>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -314,7 +328,12 @@ impl AssetCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetContainerSas {
     #[doc = "The list of Asset container SAS URLs."]
-    #[serde(rename = "assetContainerSasUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assetContainerSasUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub asset_container_sas_urls: Vec<String>,
 }
 impl AssetContainerSas {
@@ -365,7 +384,11 @@ impl AssetFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetFilterCollection {
     #[doc = "A collection of AssetFilter items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AssetFilter>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -829,7 +852,12 @@ pub struct CommonEncryptionCbcs {
     #[serde(rename = "enabledProtocols", default, skip_serializing_if = "Option::is_none")]
     pub enabled_protocols: Option<EnabledProtocols>,
     #[doc = "Representing which tracks should not be encrypted"]
-    #[serde(rename = "clearTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clearTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_tracks: Vec<TrackSelection>,
     #[doc = "Class to specify properties of all content keys in Streaming Policy"]
     #[serde(rename = "contentKeys", default, skip_serializing_if = "Option::is_none")]
@@ -850,7 +878,12 @@ pub struct CommonEncryptionCenc {
     #[serde(rename = "enabledProtocols", default, skip_serializing_if = "Option::is_none")]
     pub enabled_protocols: Option<EnabledProtocols>,
     #[doc = "Representing which tracks should not be encrypted"]
-    #[serde(rename = "clearTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clearTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_tracks: Vec<TrackSelection>,
     #[doc = "Class to specify properties of all content keys in Streaming Policy"]
     #[serde(rename = "contentKeys", default, skip_serializing_if = "Option::is_none")]
@@ -898,7 +931,11 @@ impl ContentKeyPolicyClearKeyConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContentKeyPolicyCollection {
     #[doc = "A collection of ContentKeyPolicy items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContentKeyPolicy>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1521,10 +1558,20 @@ pub struct ContentKeyPolicyTokenRestriction {
     #[serde(rename = "primaryVerificationKey")]
     pub primary_verification_key: ContentKeyPolicyRestrictionTokenKey,
     #[doc = "A list of alternative verification keys."]
-    #[serde(rename = "alternateVerificationKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateVerificationKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_verification_keys: Vec<ContentKeyPolicyRestrictionTokenKey>,
     #[doc = "A list of required token claims."]
-    #[serde(rename = "requiredClaims", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredClaims",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_claims: Vec<ContentKeyPolicyTokenClaim>,
     #[doc = "The type of token."]
     #[serde(rename = "restrictionTokenType")]
@@ -1899,7 +1946,12 @@ pub struct EnvelopeEncryption {
     #[serde(rename = "enabledProtocols", default, skip_serializing_if = "Option::is_none")]
     pub enabled_protocols: Option<EnabledProtocols>,
     #[doc = "Representing which tracks should not be encrypted"]
-    #[serde(rename = "clearTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clearTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_tracks: Vec<TrackSelection>,
     #[doc = "Class to specify properties of all content keys in Streaming Policy"]
     #[serde(rename = "contentKeys", default, skip_serializing_if = "Option::is_none")]
@@ -2198,7 +2250,11 @@ pub struct Filters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub crop: Option<Rectangle>,
     #[doc = "The properties of overlays to be applied to the input video. These could be audio, image or video overlays."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub overlays: Vec<Overlay>,
 }
 impl Filters {
@@ -2435,7 +2491,11 @@ pub struct H264Video {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub complexity: Option<h264_video::Complexity>,
     #[doc = "The collection of output H.264 layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<H264Layer>,
 }
 impl H264Video {
@@ -2571,7 +2631,11 @@ pub struct H265Video {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub complexity: Option<h265_video::Complexity>,
     #[doc = "The collection of output H.265 layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<H265Layer>,
 }
 impl H265Video {
@@ -2678,7 +2742,11 @@ impl Hls {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IpAccessControl {
     #[doc = "The IP allow list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allow: Vec<IpRange>,
 }
 impl IpAccessControl {
@@ -2746,7 +2814,12 @@ pub struct InputDefinition {
     #[serde(rename = "@odata.type")]
     pub odata_type: String,
     #[doc = "The list of TrackDescriptors which define the metadata and selection of tracks in the input."]
-    #[serde(rename = "includedTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_tracks: Vec<TrackDescriptor>,
 }
 impl InputDefinition {
@@ -2795,7 +2868,11 @@ impl Job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCollection {
     #[doc = "A collection of Job items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2828,7 +2905,11 @@ pub struct JobError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub retry: Option<job_error::Retry>,
     #[doc = "An array of details about specific errors that led to this reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<JobErrorDetail>,
 }
 impl JobError {
@@ -3020,7 +3101,11 @@ pub struct JobInputClip {
     #[serde(flatten)]
     pub job_input: JobInput,
     #[doc = "List of files. Required for JobInputHttp. Maximum of 4000 characters each."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<String>,
     #[doc = "Base class for specifying a clip time. Use sub classes of this class to specify the time position in the media."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3032,7 +3117,12 @@ pub struct JobInputClip {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Defines a list of InputDefinitions. For each InputDefinition, it defines a list of track selections and related metadata."]
-    #[serde(rename = "inputDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputDefinitions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_definitions: Vec<InputDefinition>,
 }
 impl JobInputClip {
@@ -3070,7 +3160,11 @@ pub struct JobInputSequence {
     #[serde(flatten)]
     pub job_input: JobInput,
     #[doc = "JobInputs that make up the timeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<JobInputClip>,
 }
 impl JobInputSequence {
@@ -3087,7 +3181,11 @@ pub struct JobInputs {
     #[serde(flatten)]
     pub job_input: JobInput,
     #[doc = "List of inputs to a Job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<JobInput>,
 }
 impl JobInputs {
@@ -3354,7 +3452,11 @@ pub struct JpgImage {
     #[serde(flatten)]
     pub image: Image,
     #[doc = "A collection of output JPEG image layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<JpgLayer>,
     #[doc = "Sets the number of columns used in thumbnail sprite image.  The number of rows are automatically calculated and a VTT file is generated with the coordinate mappings for each thumbnail in the sprite. Note: this value should be a positive integer and a proper value is recommended so that the output image resolution will not go beyond JPEG maximum pixel resolution limit 65535x65535."]
     #[serde(rename = "spriteColumn", default, skip_serializing_if = "Option::is_none")]
@@ -3494,7 +3596,12 @@ pub mod list_container_sas_input {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListContentKeysResponse {
     #[doc = "ContentKeys used by current Streaming Locator"]
-    #[serde(rename = "contentKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_keys: Vec<StreamingLocatorContentKey>,
 }
 impl ListContentKeysResponse {
@@ -3517,10 +3624,20 @@ impl ListEdgePoliciesInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPathsResponse {
     #[doc = "Streaming Paths supported by current Streaming Locator"]
-    #[serde(rename = "streamingPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "streamingPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub streaming_paths: Vec<StreamingPath>,
     #[doc = "Download Paths supported by current Streaming Locator"]
-    #[serde(rename = "downloadPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "downloadPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub download_paths: Vec<String>,
 }
 impl ListPathsResponse {
@@ -3532,7 +3649,12 @@ impl ListPathsResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListStreamingLocatorsResponse {
     #[doc = "The list of Streaming Locators."]
-    #[serde(rename = "streamingLocators", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "streamingLocators",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub streaming_locators: Vec<AssetStreamingLocator>,
 }
 impl ListStreamingLocatorsResponse {
@@ -3706,7 +3828,11 @@ pub struct LiveEventInput {
     #[serde(rename = "accessToken", default, skip_serializing_if = "Option::is_none")]
     pub access_token: Option<String>,
     #[doc = "The input endpoints for the live event."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<LiveEventEndpoint>,
 }
 impl LiveEventInput {
@@ -3796,7 +3922,11 @@ impl LiveEventInputTrackSelection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LiveEventListResult {
     #[doc = "The result of the List Live Event operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LiveEvent>,
     #[doc = "The number of result."]
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
@@ -3832,7 +3962,11 @@ impl LiveEventOutputTranscriptionTrack {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LiveEventPreview {
     #[doc = "The endpoints for preview. Do not share the preview URL with the live event audience."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<LiveEventEndpoint>,
     #[doc = "The IP access control for the live event preview endpoint."]
     #[serde(rename = "accessControl", default, skip_serializing_if = "Option::is_none")]
@@ -3879,7 +4013,11 @@ pub struct LiveEventProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encoding: Option<LiveEventEncoding>,
     #[doc = "Live transcription settings for the live event. See https://go.microsoft.com/fwlink/?linkid=2133742 for more information about the live transcription feature."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transcriptions: Vec<LiveEventTranscription>,
     #[doc = "The provisioning state of the live event."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3897,7 +4035,12 @@ pub struct LiveEventProperties {
     #[serde(rename = "hostnamePrefix", default, skip_serializing_if = "Option::is_none")]
     pub hostname_prefix: Option<String>,
     #[doc = "The options to use for the LiveEvent. This value is specified at creation time and cannot be updated. The valid values for the array entry values are 'Default' and 'LowLatency'."]
-    #[serde(rename = "streamOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "streamOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub stream_options: Vec<String>,
     #[doc = "The creation time for the live event"]
     #[serde(default, with = "azure_core::date::rfc3339::option")]
@@ -3982,7 +4125,12 @@ pub struct LiveEventTranscription {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub language: Option<String>,
     #[doc = "Provides a mechanism to select the audio track in the input live feed, to which speech-to-text transcription is applied. This property is reserved for future use, any value set on this property will be ignored."]
-    #[serde(rename = "inputTrackSelection", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputTrackSelection",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_track_selection: Vec<LiveEventInputTrackSelection>,
     #[doc = "Describes a transcription track in the output of a live event, generated using speech-to-text transcription. This property is reserved for future use, any value set on this property will be ignored."]
     #[serde(rename = "outputTranscriptionTrack", default, skip_serializing_if = "Option::is_none")]
@@ -4011,7 +4159,11 @@ impl LiveOutput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LiveOutputListResult {
     #[doc = "The result of the List LiveOutput operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LiveOutput>,
     #[doc = "The number of result."]
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
@@ -4160,7 +4312,11 @@ pub struct MediaFilterProperties {
     #[serde(rename = "firstQuality", default, skip_serializing_if = "Option::is_none")]
     pub first_quality: Option<FirstQuality>,
     #[doc = "The tracks selection conditions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tracks: Vec<FilterTrackSelection>,
 }
 impl MediaFilterProperties {
@@ -4196,7 +4352,11 @@ impl MediaService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MediaServiceCollection {
     #[doc = "A collection of MediaService items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MediaService>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4281,7 +4441,12 @@ pub struct MediaServiceProperties {
     #[serde(rename = "mediaServiceId", default, skip_serializing_if = "Option::is_none")]
     pub media_service_id: Option<String>,
     #[doc = "The storage accounts for this resource."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<StorageAccount>,
     #[serde(rename = "storageAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub storage_authentication: Option<media_service_properties::StorageAuthentication>,
@@ -4391,10 +4556,19 @@ pub struct MetricSpecification {
     #[serde(rename = "lockAggregationType", default, skip_serializing_if = "Option::is_none")]
     pub lock_aggregation_type: Option<metric_specification::LockAggregationType>,
     #[doc = "Supported aggregation types."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The metric dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Indicates whether regional MDM account is enabled."]
     #[serde(rename = "enableRegionalMdmAccount", default, skip_serializing_if = "Option::is_none")]
@@ -4406,7 +4580,12 @@ pub struct MetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "The supported time grain types."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
 }
 impl MetricSpecification {
@@ -4551,7 +4730,12 @@ pub struct MultiBitrateFormat {
     #[serde(flatten)]
     pub format: Format,
     #[doc = "The list of output files to produce.  Each entry in the list is a set of audio and video layer labels to be muxed together ."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
 }
 impl MultiBitrateFormat {
@@ -4587,7 +4771,11 @@ pub struct ODataError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ODataError>,
 }
 impl ODataError {
@@ -4670,7 +4858,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationCollection {
     #[doc = "A collection of Operation items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4774,7 +4966,11 @@ pub struct PngImage {
     #[serde(flatten)]
     pub image: Image,
     #[doc = "A collection of output PNG image layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<PngLayer>,
 }
 impl PngImage {
@@ -4862,7 +5058,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -4990,7 +5190,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -5005,10 +5209,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -5362,10 +5576,20 @@ impl SelectVideoTrackById {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "List of log specifications."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "List of metric specifications."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -5458,7 +5682,12 @@ pub struct StorageEncryptedAssetDecryptionData {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub key: Option<String>,
     #[doc = "Asset File encryption metadata."]
-    #[serde(rename = "assetFileEncryptionMetadata", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assetFileEncryptionMetadata",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub asset_file_encryption_metadata: Vec<AssetFileEncryptionMetadata>,
 }
 impl StorageEncryptedAssetDecryptionData {
@@ -5506,7 +5735,11 @@ impl StreamingEndpointAccessControl {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingEndpointListResult {
     #[doc = "The result of the List StreamingEndpoint operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingEndpoint>,
     #[doc = "The number of result."]
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
@@ -5545,7 +5778,12 @@ pub struct StreamingEndpointProperties {
     #[serde(rename = "maxCacheAge", default, skip_serializing_if = "Option::is_none")]
     pub max_cache_age: Option<i64>,
     #[doc = "The custom host names of the streaming endpoint"]
-    #[serde(rename = "customHostNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customHostNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_host_names: Vec<String>,
     #[doc = "The streaming endpoint host name."]
     #[serde(rename = "hostName", default, skip_serializing_if = "Option::is_none")]
@@ -5681,7 +5919,11 @@ impl StreamingLocator {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingLocatorCollection {
     #[doc = "A collection of StreamingLocator items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingLocator>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5716,7 +5958,11 @@ pub struct StreamingLocatorContentKey {
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
     pub policy_name: Option<String>,
     #[doc = "Tracks which use this Content Key"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tracks: Vec<TrackSelection>,
 }
 impl StreamingLocatorContentKey {
@@ -5798,13 +6044,22 @@ pub struct StreamingLocatorProperties {
     #[serde(rename = "defaultContentKeyPolicyName", default, skip_serializing_if = "Option::is_none")]
     pub default_content_key_policy_name: Option<String>,
     #[doc = "The ContentKeys used by this Streaming Locator."]
-    #[serde(rename = "contentKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_keys: Vec<StreamingLocatorContentKey>,
     #[doc = "Alternative Media ID of this Streaming Locator"]
     #[serde(rename = "alternativeMediaId", default, skip_serializing_if = "Option::is_none")]
     pub alternative_media_id: Option<String>,
     #[doc = "A list of asset or account filters which apply to this streaming locator"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<String>,
 }
 impl StreamingLocatorProperties {
@@ -5833,7 +6088,11 @@ pub struct StreamingPath {
     #[serde(rename = "encryptionScheme")]
     pub encryption_scheme: streaming_path::EncryptionScheme,
     #[doc = "Streaming paths for each protocol and encryptionScheme pair"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<String>,
 }
 impl StreamingPath {
@@ -5951,7 +6210,11 @@ impl StreamingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingPolicyCollection {
     #[doc = "A collection of StreamingPolicy items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingPolicy>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5978,7 +6241,11 @@ pub struct StreamingPolicyContentKey {
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
     pub policy_name: Option<String>,
     #[doc = "Tracks which use this content key"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tracks: Vec<TrackSelection>,
 }
 impl StreamingPolicyContentKey {
@@ -5993,7 +6260,12 @@ pub struct StreamingPolicyContentKeys {
     #[serde(rename = "defaultKey", default, skip_serializing_if = "Option::is_none")]
     pub default_key: Option<DefaultKey>,
     #[doc = "Representing tracks needs separate content key"]
-    #[serde(rename = "keyToTrackMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyToTrackMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_to_track_mappings: Vec<StreamingPolicyContentKey>,
 }
 impl StreamingPolicyContentKeys {
@@ -6199,7 +6471,12 @@ pub mod track_property_condition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrackSelection {
     #[doc = "TrackSelections is a track property condition list which can specify track(s)"]
-    #[serde(rename = "trackSelections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trackSelections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub track_selections: Vec<TrackPropertyCondition>,
 }
 impl TrackSelection {
@@ -6248,7 +6525,11 @@ impl Transform {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransformCollection {
     #[doc = "A collection of Transform items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Transform>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/mediaservices/src/package_2021_06/models.rs b/services/mgmt/mediaservices/src/package_2021_06/models.rs
index b57e5f10be..9ed719bf61 100644
--- a/services/mgmt/mediaservices/src/package_2021_06/models.rs
+++ b/services/mgmt/mediaservices/src/package_2021_06/models.rs
@@ -78,7 +78,12 @@ pub struct AccessControl {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<access_control::DefaultAction>,
     #[doc = "The IP allow list for access control in Key Delivery. If the default action is set to 'Allow', the IP allow list must be empty."]
-    #[serde(rename = "ipAllowList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAllowList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_allow_list: Vec<String>,
 }
 impl AccessControl {
@@ -210,7 +215,11 @@ impl AccountFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountFilterCollection {
     #[doc = "A collection of AccountFilter items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccountFilter>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -234,6 +243,7 @@ pub struct AkamaiAccessControl {
     #[serde(
         rename = "akamaiSignatureHeaderAuthenticationKeyList",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub akamai_signature_header_authentication_key_list: Vec<AkamaiSignatureHeaderAuthenticationKey>,
@@ -282,7 +292,11 @@ impl Asset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetCollection {
     #[doc = "A collection of Asset items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Asset>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -303,7 +317,12 @@ impl AssetCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetContainerSas {
     #[doc = "The list of Asset container SAS URLs."]
-    #[serde(rename = "assetContainerSasUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assetContainerSasUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub asset_container_sas_urls: Vec<String>,
 }
 impl AssetContainerSas {
@@ -354,7 +373,11 @@ impl AssetFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetFilterCollection {
     #[doc = "A collection of AssetFilter items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AssetFilter>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -825,7 +848,12 @@ pub struct CommonEncryptionCbcs {
     #[serde(rename = "enabledProtocols", default, skip_serializing_if = "Option::is_none")]
     pub enabled_protocols: Option<EnabledProtocols>,
     #[doc = "Representing which tracks should not be encrypted"]
-    #[serde(rename = "clearTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clearTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_tracks: Vec<TrackSelection>,
     #[doc = "Class to specify properties of all content keys in Streaming Policy"]
     #[serde(rename = "contentKeys", default, skip_serializing_if = "Option::is_none")]
@@ -846,7 +874,12 @@ pub struct CommonEncryptionCenc {
     #[serde(rename = "enabledProtocols", default, skip_serializing_if = "Option::is_none")]
     pub enabled_protocols: Option<EnabledProtocols>,
     #[doc = "Representing which tracks should not be encrypted"]
-    #[serde(rename = "clearTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clearTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_tracks: Vec<TrackSelection>,
     #[doc = "Class to specify properties of all content keys in Streaming Policy"]
     #[serde(rename = "contentKeys", default, skip_serializing_if = "Option::is_none")]
@@ -894,7 +927,11 @@ impl ContentKeyPolicyClearKeyConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContentKeyPolicyCollection {
     #[doc = "A collection of ContentKeyPolicy items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContentKeyPolicy>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1517,10 +1554,20 @@ pub struct ContentKeyPolicyTokenRestriction {
     #[serde(rename = "primaryVerificationKey")]
     pub primary_verification_key: ContentKeyPolicyRestrictionTokenKey,
     #[doc = "A list of alternative verification keys."]
-    #[serde(rename = "alternateVerificationKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateVerificationKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_verification_keys: Vec<ContentKeyPolicyRestrictionTokenKey>,
     #[doc = "A list of required token claims."]
-    #[serde(rename = "requiredClaims", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredClaims",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_claims: Vec<ContentKeyPolicyTokenClaim>,
     #[doc = "The type of token."]
     #[serde(rename = "restrictionTokenType")]
@@ -1895,7 +1942,12 @@ pub struct EnvelopeEncryption {
     #[serde(rename = "enabledProtocols", default, skip_serializing_if = "Option::is_none")]
     pub enabled_protocols: Option<EnabledProtocols>,
     #[doc = "Representing which tracks should not be encrypted"]
-    #[serde(rename = "clearTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clearTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_tracks: Vec<TrackSelection>,
     #[doc = "Class to specify properties of all content keys in Streaming Policy"]
     #[serde(rename = "contentKeys", default, skip_serializing_if = "Option::is_none")]
@@ -1937,10 +1989,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -2251,7 +2312,11 @@ pub struct Filters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub crop: Option<Rectangle>,
     #[doc = "The properties of overlays to be applied to the input video. These could be audio, image or video overlays."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub overlays: Vec<Overlay>,
 }
 impl Filters {
@@ -2488,7 +2553,11 @@ pub struct H264Video {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub complexity: Option<h264_video::Complexity>,
     #[doc = "The collection of output H.264 layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<H264Layer>,
 }
 impl H264Video {
@@ -2624,7 +2693,11 @@ pub struct H265Video {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub complexity: Option<h265_video::Complexity>,
     #[doc = "The collection of output H.265 layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<H265Layer>,
 }
 impl H265Video {
@@ -2731,7 +2804,11 @@ impl Hls {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IpAccessControl {
     #[doc = "The IP allow list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allow: Vec<IpRange>,
 }
 impl IpAccessControl {
@@ -2799,7 +2876,12 @@ pub struct InputDefinition {
     #[serde(rename = "@odata.type")]
     pub odata_type: String,
     #[doc = "The list of TrackDescriptors which define the metadata and selection of tracks in the input."]
-    #[serde(rename = "includedTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_tracks: Vec<TrackDescriptor>,
 }
 impl InputDefinition {
@@ -2848,7 +2930,11 @@ impl Job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCollection {
     #[doc = "A collection of Job items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2881,7 +2967,11 @@ pub struct JobError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub retry: Option<job_error::Retry>,
     #[doc = "An array of details about specific errors that led to this reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<JobErrorDetail>,
 }
 impl JobError {
@@ -3073,7 +3163,11 @@ pub struct JobInputClip {
     #[serde(flatten)]
     pub job_input: JobInput,
     #[doc = "List of files. Required for JobInputHttp. Maximum of 4000 characters each. Query strings will not be returned in service responses to prevent sensitive data exposure."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<String>,
     #[doc = "Base class for specifying a clip time. Use sub classes of this class to specify the time position in the media."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3085,7 +3179,12 @@ pub struct JobInputClip {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Defines a list of InputDefinitions. For each InputDefinition, it defines a list of track selections and related metadata."]
-    #[serde(rename = "inputDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputDefinitions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_definitions: Vec<InputDefinition>,
 }
 impl JobInputClip {
@@ -3123,7 +3222,11 @@ pub struct JobInputSequence {
     #[serde(flatten)]
     pub job_input: JobInput,
     #[doc = "JobInputs that make up the timeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<JobInputClip>,
 }
 impl JobInputSequence {
@@ -3140,7 +3243,11 @@ pub struct JobInputs {
     #[serde(flatten)]
     pub job_input: JobInput,
     #[doc = "List of inputs to a Job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<JobInput>,
 }
 impl JobInputs {
@@ -3411,7 +3518,11 @@ pub struct JpgImage {
     #[serde(flatten)]
     pub image: Image,
     #[doc = "A collection of output JPEG image layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<JpgLayer>,
     #[doc = "Sets the number of columns used in thumbnail sprite image.  The number of rows are automatically calculated and a VTT file is generated with the coordinate mappings for each thumbnail in the sprite. Note: this value should be a positive integer and a proper value is recommended so that the output image resolution will not go beyond JPEG maximum pixel resolution limit 65535x65535."]
     #[serde(rename = "spriteColumn", default, skip_serializing_if = "Option::is_none")]
@@ -3551,7 +3662,12 @@ pub mod list_container_sas_input {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListContentKeysResponse {
     #[doc = "ContentKeys used by current Streaming Locator"]
-    #[serde(rename = "contentKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_keys: Vec<StreamingLocatorContentKey>,
 }
 impl ListContentKeysResponse {
@@ -3574,10 +3690,20 @@ impl ListEdgePoliciesInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPathsResponse {
     #[doc = "Streaming Paths supported by current Streaming Locator"]
-    #[serde(rename = "streamingPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "streamingPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub streaming_paths: Vec<StreamingPath>,
     #[doc = "Download Paths supported by current Streaming Locator"]
-    #[serde(rename = "downloadPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "downloadPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub download_paths: Vec<String>,
 }
 impl ListPathsResponse {
@@ -3589,7 +3715,12 @@ impl ListPathsResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListStreamingLocatorsResponse {
     #[doc = "The list of Streaming Locators."]
-    #[serde(rename = "streamingLocators", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "streamingLocators",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub streaming_locators: Vec<AssetStreamingLocator>,
 }
 impl ListStreamingLocatorsResponse {
@@ -3767,7 +3898,11 @@ pub struct LiveEventInput {
     #[serde(rename = "accessToken", default, skip_serializing_if = "Option::is_none")]
     pub access_token: Option<String>,
     #[doc = "The input endpoints for the live event."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<LiveEventEndpoint>,
 }
 impl LiveEventInput {
@@ -3857,7 +3992,11 @@ impl LiveEventInputTrackSelection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LiveEventListResult {
     #[doc = "The result of the List Live Event operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LiveEvent>,
     #[doc = "The number of result."]
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
@@ -3893,7 +4032,11 @@ impl LiveEventOutputTranscriptionTrack {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LiveEventPreview {
     #[doc = "The endpoints for preview. Do not share the preview URL with the live event audience."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<LiveEventEndpoint>,
     #[doc = "The IP access control for the live event preview endpoint."]
     #[serde(rename = "accessControl", default, skip_serializing_if = "Option::is_none")]
@@ -3940,7 +4083,11 @@ pub struct LiveEventProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encoding: Option<LiveEventEncoding>,
     #[doc = "Live transcription settings for the live event. See https://go.microsoft.com/fwlink/?linkid=2133742 for more information about the live transcription feature."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transcriptions: Vec<LiveEventTranscription>,
     #[doc = "The provisioning state of the live event."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3958,7 +4105,12 @@ pub struct LiveEventProperties {
     #[serde(rename = "hostnamePrefix", default, skip_serializing_if = "Option::is_none")]
     pub hostname_prefix: Option<String>,
     #[doc = "The options to use for the LiveEvent. This value is specified at creation time and cannot be updated. The valid values for the array entry values are 'Default' and 'LowLatency'."]
-    #[serde(rename = "streamOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "streamOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub stream_options: Vec<String>,
     #[doc = "The creation time for the live event"]
     #[serde(default, with = "azure_core::date::rfc3339::option")]
@@ -4043,7 +4195,12 @@ pub struct LiveEventTranscription {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub language: Option<String>,
     #[doc = "Provides a mechanism to select the audio track in the input live feed, to which speech-to-text transcription is applied. This property is reserved for future use, any value set on this property will be ignored."]
-    #[serde(rename = "inputTrackSelection", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputTrackSelection",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_track_selection: Vec<LiveEventInputTrackSelection>,
     #[doc = "Describes a transcription track in the output of a live event, generated using speech-to-text transcription. This property is reserved for future use, any value set on this property will be ignored."]
     #[serde(rename = "outputTranscriptionTrack", default, skip_serializing_if = "Option::is_none")]
@@ -4075,7 +4232,11 @@ impl LiveOutput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LiveOutputListResult {
     #[doc = "The result of the List LiveOutput operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LiveOutput>,
     #[doc = "The number of result."]
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
@@ -4215,7 +4376,11 @@ pub struct MediaFilterProperties {
     #[serde(rename = "firstQuality", default, skip_serializing_if = "Option::is_none")]
     pub first_quality: Option<FirstQuality>,
     #[doc = "The tracks selection conditions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tracks: Vec<FilterTrackSelection>,
 }
 impl MediaFilterProperties {
@@ -4251,7 +4416,11 @@ impl MediaService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MediaServiceCollection {
     #[doc = "A collection of MediaService items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MediaService>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4300,7 +4469,12 @@ pub struct MediaServiceProperties {
     #[serde(rename = "mediaServiceId", default, skip_serializing_if = "Option::is_none")]
     pub media_service_id: Option<String>,
     #[doc = "The storage accounts for this resource."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<StorageAccount>,
     #[serde(rename = "storageAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub storage_authentication: Option<media_service_properties::StorageAuthentication>,
@@ -4450,10 +4624,19 @@ pub struct MetricSpecification {
     #[serde(rename = "lockAggregationType", default, skip_serializing_if = "Option::is_none")]
     pub lock_aggregation_type: Option<metric_specification::LockAggregationType>,
     #[doc = "Supported aggregation types."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The metric dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Indicates whether regional MDM account is enabled."]
     #[serde(rename = "enableRegionalMdmAccount", default, skip_serializing_if = "Option::is_none")]
@@ -4465,7 +4648,12 @@ pub struct MetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "The supported time grain types."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
 }
 impl MetricSpecification {
@@ -4610,7 +4798,12 @@ pub struct MultiBitrateFormat {
     #[serde(flatten)]
     pub format: Format,
     #[doc = "The list of output files to produce.  Each entry in the list is a set of audio and video layer labels to be muxed together ."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
 }
 impl MultiBitrateFormat {
@@ -4708,7 +4901,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationCollection {
     #[doc = "A collection of Operation items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationCollection {
@@ -4803,7 +5000,11 @@ pub struct PngImage {
     #[serde(flatten)]
     pub image: Image,
     #[doc = "A collection of output PNG image layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<PngLayer>,
 }
 impl PngImage {
@@ -5003,7 +5204,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -5131,7 +5336,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -5146,10 +5355,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -5508,10 +5727,20 @@ impl SelectVideoTrackById {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "List of log specifications."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "List of metric specifications."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -5614,7 +5843,12 @@ pub struct StorageEncryptedAssetDecryptionData {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub key: Option<String>,
     #[doc = "Asset File encryption metadata."]
-    #[serde(rename = "assetFileEncryptionMetadata", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assetFileEncryptionMetadata",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub asset_file_encryption_metadata: Vec<AssetFileEncryptionMetadata>,
 }
 impl StorageEncryptedAssetDecryptionData {
@@ -5662,7 +5896,11 @@ impl StreamingEndpointAccessControl {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingEndpointListResult {
     #[doc = "The result of the List StreamingEndpoint operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingEndpoint>,
     #[doc = "The number of result."]
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
@@ -5701,7 +5939,12 @@ pub struct StreamingEndpointProperties {
     #[serde(rename = "maxCacheAge", default, skip_serializing_if = "Option::is_none")]
     pub max_cache_age: Option<i64>,
     #[doc = "The custom host names of the streaming endpoint"]
-    #[serde(rename = "customHostNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customHostNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_host_names: Vec<String>,
     #[doc = "The streaming endpoint host name."]
     #[serde(rename = "hostName", default, skip_serializing_if = "Option::is_none")]
@@ -5837,7 +6080,11 @@ impl StreamingLocator {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingLocatorCollection {
     #[doc = "A collection of StreamingLocator items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingLocator>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5872,7 +6119,11 @@ pub struct StreamingLocatorContentKey {
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
     pub policy_name: Option<String>,
     #[doc = "Tracks which use this Content Key"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tracks: Vec<TrackSelection>,
 }
 impl StreamingLocatorContentKey {
@@ -5954,13 +6205,22 @@ pub struct StreamingLocatorProperties {
     #[serde(rename = "defaultContentKeyPolicyName", default, skip_serializing_if = "Option::is_none")]
     pub default_content_key_policy_name: Option<String>,
     #[doc = "The ContentKeys used by this Streaming Locator."]
-    #[serde(rename = "contentKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_keys: Vec<StreamingLocatorContentKey>,
     #[doc = "Alternative Media ID of this Streaming Locator"]
     #[serde(rename = "alternativeMediaId", default, skip_serializing_if = "Option::is_none")]
     pub alternative_media_id: Option<String>,
     #[doc = "A list of asset or account filters which apply to this streaming locator"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<String>,
 }
 impl StreamingLocatorProperties {
@@ -5989,7 +6249,11 @@ pub struct StreamingPath {
     #[serde(rename = "encryptionScheme")]
     pub encryption_scheme: streaming_path::EncryptionScheme,
     #[doc = "Streaming paths for each protocol and encryptionScheme pair"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<String>,
 }
 impl StreamingPath {
@@ -6107,7 +6371,11 @@ impl StreamingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingPolicyCollection {
     #[doc = "A collection of StreamingPolicy items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingPolicy>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6134,7 +6402,11 @@ pub struct StreamingPolicyContentKey {
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
     pub policy_name: Option<String>,
     #[doc = "Tracks which use this content key"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tracks: Vec<TrackSelection>,
 }
 impl StreamingPolicyContentKey {
@@ -6149,7 +6421,12 @@ pub struct StreamingPolicyContentKeys {
     #[serde(rename = "defaultKey", default, skip_serializing_if = "Option::is_none")]
     pub default_key: Option<DefaultKey>,
     #[doc = "Representing tracks needs separate content key"]
-    #[serde(rename = "keyToTrackMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyToTrackMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_to_track_mappings: Vec<StreamingPolicyContentKey>,
 }
 impl StreamingPolicyContentKeys {
@@ -6355,7 +6632,12 @@ pub mod track_property_condition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrackSelection {
     #[doc = "TrackSelections is a track property condition list which can specify track(s)"]
-    #[serde(rename = "trackSelections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trackSelections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub track_selections: Vec<TrackPropertyCondition>,
 }
 impl TrackSelection {
@@ -6404,7 +6686,11 @@ impl Transform {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransformCollection {
     #[doc = "A collection of Transform items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Transform>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/mediaservices/src/package_2021_11/models.rs b/services/mgmt/mediaservices/src/package_2021_11/models.rs
index d469c59f90..d1d1636b76 100644
--- a/services/mgmt/mediaservices/src/package_2021_11/models.rs
+++ b/services/mgmt/mediaservices/src/package_2021_11/models.rs
@@ -78,7 +78,12 @@ pub struct AccessControl {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<access_control::DefaultAction>,
     #[doc = "The IP allow list for access control in Key Delivery. If the default action is set to 'Allow', the IP allow list must be empty."]
-    #[serde(rename = "ipAllowList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAllowList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_allow_list: Vec<String>,
 }
 impl AccessControl {
@@ -210,7 +215,11 @@ impl AccountFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountFilterCollection {
     #[doc = "A collection of AccountFilter items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccountFilter>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -234,6 +243,7 @@ pub struct AkamaiAccessControl {
     #[serde(
         rename = "akamaiSignatureHeaderAuthenticationKeyList",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub akamai_signature_header_authentication_key_list: Vec<AkamaiSignatureHeaderAuthenticationKey>,
@@ -345,7 +355,11 @@ impl Asset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetCollection {
     #[doc = "A collection of Asset items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Asset>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -366,7 +380,12 @@ impl AssetCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetContainerSas {
     #[doc = "The list of Asset container SAS URLs."]
-    #[serde(rename = "assetContainerSasUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assetContainerSasUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub asset_container_sas_urls: Vec<String>,
 }
 impl AssetContainerSas {
@@ -417,7 +436,11 @@ impl AssetFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetFilterCollection {
     #[doc = "A collection of AssetFilter items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AssetFilter>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -560,7 +583,11 @@ impl AssetTrack {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetTrackCollection {
     #[doc = "A collection of AssetTrack items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AssetTrack>,
 }
 impl azure_core::Continuable for AssetTrackCollection {
@@ -1020,7 +1047,12 @@ pub struct CommonEncryptionCbcs {
     #[serde(rename = "enabledProtocols", default, skip_serializing_if = "Option::is_none")]
     pub enabled_protocols: Option<EnabledProtocols>,
     #[doc = "Representing which tracks should not be encrypted"]
-    #[serde(rename = "clearTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clearTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_tracks: Vec<TrackSelection>,
     #[doc = "Class to specify properties of all content keys in Streaming Policy"]
     #[serde(rename = "contentKeys", default, skip_serializing_if = "Option::is_none")]
@@ -1041,7 +1073,12 @@ pub struct CommonEncryptionCenc {
     #[serde(rename = "enabledProtocols", default, skip_serializing_if = "Option::is_none")]
     pub enabled_protocols: Option<EnabledProtocols>,
     #[doc = "Representing which tracks should not be encrypted"]
-    #[serde(rename = "clearTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clearTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_tracks: Vec<TrackSelection>,
     #[doc = "Class to specify properties of all content keys in Streaming Policy"]
     #[serde(rename = "contentKeys", default, skip_serializing_if = "Option::is_none")]
@@ -1089,7 +1126,11 @@ impl ContentKeyPolicyClearKeyConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContentKeyPolicyCollection {
     #[doc = "A collection of ContentKeyPolicy items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContentKeyPolicy>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1712,10 +1753,20 @@ pub struct ContentKeyPolicyTokenRestriction {
     #[serde(rename = "primaryVerificationKey")]
     pub primary_verification_key: ContentKeyPolicyRestrictionTokenKey,
     #[doc = "A list of alternative verification keys."]
-    #[serde(rename = "alternateVerificationKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateVerificationKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_verification_keys: Vec<ContentKeyPolicyRestrictionTokenKey>,
     #[doc = "A list of required token claims."]
-    #[serde(rename = "requiredClaims", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredClaims",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_claims: Vec<ContentKeyPolicyTokenClaim>,
     #[doc = "The type of token."]
     #[serde(rename = "restrictionTokenType")]
@@ -2090,7 +2141,12 @@ pub struct EnvelopeEncryption {
     #[serde(rename = "enabledProtocols", default, skip_serializing_if = "Option::is_none")]
     pub enabled_protocols: Option<EnabledProtocols>,
     #[doc = "Representing which tracks should not be encrypted"]
-    #[serde(rename = "clearTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clearTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_tracks: Vec<TrackSelection>,
     #[doc = "Class to specify properties of all content keys in Streaming Policy"]
     #[serde(rename = "contentKeys", default, skip_serializing_if = "Option::is_none")]
@@ -2132,10 +2188,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -2446,7 +2511,11 @@ pub struct Filters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub crop: Option<Rectangle>,
     #[doc = "The properties of overlays to be applied to the input video. These could be audio, image or video overlays."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub overlays: Vec<Overlay>,
 }
 impl Filters {
@@ -2684,7 +2753,11 @@ pub struct H264Video {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub complexity: Option<h264_video::Complexity>,
     #[doc = "The collection of output H.264 layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<H264Layer>,
     #[doc = "The video rate control mode"]
     #[serde(rename = "rateControlMode", default, skip_serializing_if = "Option::is_none")]
@@ -2875,7 +2948,11 @@ pub struct H265Video {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub complexity: Option<h265_video::Complexity>,
     #[doc = "The collection of output H.265 layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<H265Layer>,
 }
 impl H265Video {
@@ -3000,7 +3077,11 @@ impl HlsSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IpAccessControl {
     #[doc = "The IP allow list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allow: Vec<IpRange>,
 }
 impl IpAccessControl {
@@ -3068,7 +3149,12 @@ pub struct InputDefinition {
     #[serde(rename = "@odata.type")]
     pub odata_type: String,
     #[doc = "The list of TrackDescriptors which define the metadata and selection of tracks in the input."]
-    #[serde(rename = "includedTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_tracks: Vec<TrackDescriptor>,
 }
 impl InputDefinition {
@@ -3117,7 +3203,11 @@ impl Job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCollection {
     #[doc = "A collection of Job items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3150,7 +3240,11 @@ pub struct JobError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub retry: Option<job_error::Retry>,
     #[doc = "An array of details about specific errors that led to this reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<JobErrorDetail>,
 }
 impl JobError {
@@ -3342,7 +3436,11 @@ pub struct JobInputClip {
     #[serde(flatten)]
     pub job_input: JobInput,
     #[doc = "List of files. Required for JobInputHttp. Maximum of 4000 characters each. Query strings will not be returned in service responses to prevent sensitive data exposure."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<String>,
     #[doc = "Base class for specifying a clip time. Use sub classes of this class to specify the time position in the media."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3354,7 +3452,12 @@ pub struct JobInputClip {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Defines a list of InputDefinitions. For each InputDefinition, it defines a list of track selections and related metadata."]
-    #[serde(rename = "inputDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputDefinitions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_definitions: Vec<InputDefinition>,
 }
 impl JobInputClip {
@@ -3392,7 +3495,11 @@ pub struct JobInputSequence {
     #[serde(flatten)]
     pub job_input: JobInput,
     #[doc = "JobInputs that make up the timeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<JobInputClip>,
 }
 impl JobInputSequence {
@@ -3409,7 +3516,11 @@ pub struct JobInputs {
     #[serde(flatten)]
     pub job_input: JobInput,
     #[doc = "List of inputs to a Job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<JobInput>,
 }
 impl JobInputs {
@@ -3680,7 +3791,11 @@ pub struct JpgImage {
     #[serde(flatten)]
     pub image: Image,
     #[doc = "A collection of output JPEG image layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<JpgLayer>,
     #[doc = "Sets the number of columns used in thumbnail sprite image.  The number of rows are automatically calculated and a VTT file is generated with the coordinate mappings for each thumbnail in the sprite. Note: this value should be a positive integer and a proper value is recommended so that the output image resolution will not go beyond JPEG maximum pixel resolution limit 65535x65535."]
     #[serde(rename = "spriteColumn", default, skip_serializing_if = "Option::is_none")]
@@ -3812,7 +3927,12 @@ pub mod list_container_sas_input {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListContentKeysResponse {
     #[doc = "ContentKeys used by current Streaming Locator"]
-    #[serde(rename = "contentKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_keys: Vec<StreamingLocatorContentKey>,
 }
 impl ListContentKeysResponse {
@@ -3835,10 +3955,20 @@ impl ListEdgePoliciesInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPathsResponse {
     #[doc = "Streaming Paths supported by current Streaming Locator"]
-    #[serde(rename = "streamingPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "streamingPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub streaming_paths: Vec<StreamingPath>,
     #[doc = "Download Paths supported by current Streaming Locator"]
-    #[serde(rename = "downloadPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "downloadPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub download_paths: Vec<String>,
 }
 impl ListPathsResponse {
@@ -3850,7 +3980,12 @@ impl ListPathsResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListStreamingLocatorsResponse {
     #[doc = "The list of Streaming Locators."]
-    #[serde(rename = "streamingLocators", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "streamingLocators",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub streaming_locators: Vec<AssetStreamingLocator>,
 }
 impl ListStreamingLocatorsResponse {
@@ -4028,7 +4163,11 @@ pub struct LiveEventInput {
     #[serde(rename = "accessToken", default, skip_serializing_if = "Option::is_none")]
     pub access_token: Option<String>,
     #[doc = "The input endpoints for the live event."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<LiveEventEndpoint>,
 }
 impl LiveEventInput {
@@ -4118,7 +4257,11 @@ impl LiveEventInputTrackSelection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LiveEventListResult {
     #[doc = "The result of the List Live Event operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LiveEvent>,
     #[doc = "The number of result."]
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
@@ -4154,7 +4297,11 @@ impl LiveEventOutputTranscriptionTrack {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LiveEventPreview {
     #[doc = "The endpoints for preview. Do not share the preview URL with the live event audience."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<LiveEventEndpoint>,
     #[doc = "The IP access control for the live event preview endpoint."]
     #[serde(rename = "accessControl", default, skip_serializing_if = "Option::is_none")]
@@ -4201,7 +4348,11 @@ pub struct LiveEventProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encoding: Option<LiveEventEncoding>,
     #[doc = "Live transcription settings for the live event. See https://go.microsoft.com/fwlink/?linkid=2133742 for more information about the live transcription feature."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transcriptions: Vec<LiveEventTranscription>,
     #[doc = "The provisioning state of the live event."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -4219,7 +4370,12 @@ pub struct LiveEventProperties {
     #[serde(rename = "hostnamePrefix", default, skip_serializing_if = "Option::is_none")]
     pub hostname_prefix: Option<String>,
     #[doc = "The options to use for the LiveEvent. This value is specified at creation time and cannot be updated. The valid values for the array entry values are 'Default' and 'LowLatency'."]
-    #[serde(rename = "streamOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "streamOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub stream_options: Vec<String>,
     #[doc = "The creation time for the live event"]
     #[serde(default, with = "azure_core::date::rfc3339::option")]
@@ -4304,7 +4460,12 @@ pub struct LiveEventTranscription {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub language: Option<String>,
     #[doc = "Provides a mechanism to select the audio track in the input live feed, to which speech-to-text transcription is applied. This property is reserved for future use, any value set on this property will be ignored."]
-    #[serde(rename = "inputTrackSelection", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputTrackSelection",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_track_selection: Vec<LiveEventInputTrackSelection>,
     #[doc = "Describes a transcription track in the output of a live event, generated using speech-to-text transcription. This property is reserved for future use, any value set on this property will be ignored."]
     #[serde(rename = "outputTranscriptionTrack", default, skip_serializing_if = "Option::is_none")]
@@ -4336,7 +4497,11 @@ impl LiveOutput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LiveOutputListResult {
     #[doc = "The result of the List LiveOutput operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LiveOutput>,
     #[doc = "The number of result."]
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
@@ -4476,7 +4641,11 @@ pub struct MediaFilterProperties {
     #[serde(rename = "firstQuality", default, skip_serializing_if = "Option::is_none")]
     pub first_quality: Option<FirstQuality>,
     #[doc = "The tracks selection conditions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tracks: Vec<FilterTrackSelection>,
 }
 impl MediaFilterProperties {
@@ -4512,7 +4681,11 @@ impl MediaService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MediaServiceCollection {
     #[doc = "A collection of MediaService items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MediaService>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4561,7 +4734,12 @@ pub struct MediaServiceProperties {
     #[serde(rename = "mediaServiceId", default, skip_serializing_if = "Option::is_none")]
     pub media_service_id: Option<String>,
     #[doc = "The storage accounts for this resource."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<StorageAccount>,
     #[serde(rename = "storageAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub storage_authentication: Option<media_service_properties::StorageAuthentication>,
@@ -4711,10 +4889,19 @@ pub struct MetricSpecification {
     #[serde(rename = "lockAggregationType", default, skip_serializing_if = "Option::is_none")]
     pub lock_aggregation_type: Option<metric_specification::LockAggregationType>,
     #[doc = "Supported aggregation types."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The metric dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Indicates whether regional MDM account is enabled."]
     #[serde(rename = "enableRegionalMdmAccount", default, skip_serializing_if = "Option::is_none")]
@@ -4726,7 +4913,12 @@ pub struct MetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "The supported time grain types."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
 }
 impl MetricSpecification {
@@ -4871,7 +5063,12 @@ pub struct MultiBitrateFormat {
     #[serde(flatten)]
     pub format: Format,
     #[doc = "The list of output files to produce.  Each entry in the list is a set of audio and video layer labels to be muxed together ."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
 }
 impl MultiBitrateFormat {
@@ -4969,7 +5166,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationCollection {
     #[doc = "A collection of Operation items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationCollection {
@@ -5064,7 +5265,11 @@ pub struct PngImage {
     #[serde(flatten)]
     pub image: Image,
     #[doc = "A collection of output PNG image layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<PngLayer>,
 }
 impl PngImage {
@@ -5264,7 +5469,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -5392,7 +5601,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -5407,10 +5620,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -5769,10 +5992,20 @@ impl SelectVideoTrackById {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "List of log specifications."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "List of metric specifications."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -5875,7 +6108,12 @@ pub struct StorageEncryptedAssetDecryptionData {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub key: Option<String>,
     #[doc = "Asset File encryption metadata."]
-    #[serde(rename = "assetFileEncryptionMetadata", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assetFileEncryptionMetadata",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub asset_file_encryption_metadata: Vec<AssetFileEncryptionMetadata>,
 }
 impl StorageEncryptedAssetDecryptionData {
@@ -5927,7 +6165,11 @@ impl StreamingEndpointAccessControl {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingEndpointListResult {
     #[doc = "The result of the List StreamingEndpoint operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingEndpoint>,
     #[doc = "The number of result."]
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
@@ -5966,7 +6208,12 @@ pub struct StreamingEndpointProperties {
     #[serde(rename = "maxCacheAge", default, skip_serializing_if = "Option::is_none")]
     pub max_cache_age: Option<i64>,
     #[doc = "The custom host names of the streaming endpoint"]
-    #[serde(rename = "customHostNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customHostNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_host_names: Vec<String>,
     #[doc = "The streaming endpoint host name."]
     #[serde(rename = "hostName", default, skip_serializing_if = "Option::is_none")]
@@ -6072,7 +6319,11 @@ pub mod streaming_endpoint_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingEndpointSkuInfoListResult {
     #[doc = "The result of the List StreamingEndpoint skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArmStreamingEndpointSkuInfo>,
 }
 impl StreamingEndpointSkuInfoListResult {
@@ -6113,7 +6364,11 @@ impl StreamingLocator {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingLocatorCollection {
     #[doc = "A collection of StreamingLocator items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingLocator>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6148,7 +6403,11 @@ pub struct StreamingLocatorContentKey {
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
     pub policy_name: Option<String>,
     #[doc = "Tracks which use this Content Key"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tracks: Vec<TrackSelection>,
 }
 impl StreamingLocatorContentKey {
@@ -6230,13 +6489,22 @@ pub struct StreamingLocatorProperties {
     #[serde(rename = "defaultContentKeyPolicyName", default, skip_serializing_if = "Option::is_none")]
     pub default_content_key_policy_name: Option<String>,
     #[doc = "The ContentKeys used by this Streaming Locator."]
-    #[serde(rename = "contentKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_keys: Vec<StreamingLocatorContentKey>,
     #[doc = "Alternative Media ID of this Streaming Locator"]
     #[serde(rename = "alternativeMediaId", default, skip_serializing_if = "Option::is_none")]
     pub alternative_media_id: Option<String>,
     #[doc = "A list of asset or account filters which apply to this streaming locator"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<String>,
 }
 impl StreamingLocatorProperties {
@@ -6265,7 +6533,11 @@ pub struct StreamingPath {
     #[serde(rename = "encryptionScheme")]
     pub encryption_scheme: streaming_path::EncryptionScheme,
     #[doc = "Streaming paths for each protocol and encryptionScheme pair"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<String>,
 }
 impl StreamingPath {
@@ -6383,7 +6655,11 @@ impl StreamingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingPolicyCollection {
     #[doc = "A collection of StreamingPolicy items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingPolicy>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6410,7 +6686,11 @@ pub struct StreamingPolicyContentKey {
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
     pub policy_name: Option<String>,
     #[doc = "Tracks which use this content key"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tracks: Vec<TrackSelection>,
 }
 impl StreamingPolicyContentKey {
@@ -6425,7 +6705,12 @@ pub struct StreamingPolicyContentKeys {
     #[serde(rename = "defaultKey", default, skip_serializing_if = "Option::is_none")]
     pub default_key: Option<DefaultKey>,
     #[doc = "Representing tracks needs separate content key"]
-    #[serde(rename = "keyToTrackMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyToTrackMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_to_track_mappings: Vec<StreamingPolicyContentKey>,
 }
 impl StreamingPolicyContentKeys {
@@ -6716,7 +7001,12 @@ pub mod track_property_condition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrackSelection {
     #[doc = "TrackSelections is a track property condition list which can specify track(s)"]
-    #[serde(rename = "trackSelections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trackSelections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub track_selections: Vec<TrackPropertyCondition>,
 }
 impl TrackSelection {
@@ -6765,7 +7055,11 @@ impl Transform {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransformCollection {
     #[doc = "A collection of Transform items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Transform>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/mediaservices/src/package_2022_08/models.rs b/services/mgmt/mediaservices/src/package_2022_08/models.rs
index 92d1b1e6f8..40c81f24cb 100644
--- a/services/mgmt/mediaservices/src/package_2022_08/models.rs
+++ b/services/mgmt/mediaservices/src/package_2022_08/models.rs
@@ -78,7 +78,12 @@ pub struct AccessControl {
     #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
     pub default_action: Option<access_control::DefaultAction>,
     #[doc = "The IP allow list for access control in Key Delivery. If the default action is set to 'Allow', the IP allow list must be empty."]
-    #[serde(rename = "ipAllowList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAllowList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_allow_list: Vec<String>,
 }
 impl AccessControl {
@@ -210,7 +215,11 @@ impl AccountFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountFilterCollection {
     #[doc = "A collection of AccountFilter items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccountFilter>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -234,6 +243,7 @@ pub struct AkamaiAccessControl {
     #[serde(
         rename = "akamaiSignatureHeaderAuthenticationKeyList",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub akamai_signature_header_authentication_key_list: Vec<AkamaiSignatureHeaderAuthenticationKey>,
@@ -345,7 +355,11 @@ impl Asset {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetCollection {
     #[doc = "A collection of Asset items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Asset>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -366,7 +380,12 @@ impl AssetCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetContainerSas {
     #[doc = "The list of Asset container SAS URLs."]
-    #[serde(rename = "assetContainerSasUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assetContainerSasUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub asset_container_sas_urls: Vec<String>,
 }
 impl AssetContainerSas {
@@ -417,7 +436,11 @@ impl AssetFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetFilterCollection {
     #[doc = "A collection of AssetFilter items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AssetFilter>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -560,7 +583,11 @@ impl AssetTrack {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssetTrackCollection {
     #[doc = "A collection of AssetTrack items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AssetTrack>,
 }
 impl azure_core::Continuable for AssetTrackCollection {
@@ -1080,7 +1107,12 @@ pub struct CommonEncryptionCbcs {
     #[serde(rename = "enabledProtocols", default, skip_serializing_if = "Option::is_none")]
     pub enabled_protocols: Option<EnabledProtocols>,
     #[doc = "Representing which tracks should not be encrypted"]
-    #[serde(rename = "clearTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clearTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_tracks: Vec<TrackSelection>,
     #[doc = "Class to specify properties of all content keys in Streaming Policy"]
     #[serde(rename = "contentKeys", default, skip_serializing_if = "Option::is_none")]
@@ -1101,7 +1133,12 @@ pub struct CommonEncryptionCenc {
     #[serde(rename = "enabledProtocols", default, skip_serializing_if = "Option::is_none")]
     pub enabled_protocols: Option<EnabledProtocols>,
     #[doc = "Representing which tracks should not be encrypted"]
-    #[serde(rename = "clearTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clearTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_tracks: Vec<TrackSelection>,
     #[doc = "Class to specify properties of all content keys in Streaming Policy"]
     #[serde(rename = "contentKeys", default, skip_serializing_if = "Option::is_none")]
@@ -1149,7 +1186,11 @@ impl ContentKeyPolicyClearKeyConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContentKeyPolicyCollection {
     #[doc = "A collection of ContentKeyPolicy items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContentKeyPolicy>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1772,10 +1813,20 @@ pub struct ContentKeyPolicyTokenRestriction {
     #[serde(rename = "primaryVerificationKey")]
     pub primary_verification_key: ContentKeyPolicyRestrictionTokenKey,
     #[doc = "A list of alternative verification keys."]
-    #[serde(rename = "alternateVerificationKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateVerificationKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_verification_keys: Vec<ContentKeyPolicyRestrictionTokenKey>,
     #[doc = "A list of required token claims."]
-    #[serde(rename = "requiredClaims", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredClaims",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_claims: Vec<ContentKeyPolicyTokenClaim>,
     #[doc = "The type of token."]
     #[serde(rename = "restrictionTokenType")]
@@ -2150,7 +2201,12 @@ pub struct EnvelopeEncryption {
     #[serde(rename = "enabledProtocols", default, skip_serializing_if = "Option::is_none")]
     pub enabled_protocols: Option<EnabledProtocols>,
     #[doc = "Representing which tracks should not be encrypted"]
-    #[serde(rename = "clearTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clearTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_tracks: Vec<TrackSelection>,
     #[doc = "Class to specify properties of all content keys in Streaming Policy"]
     #[serde(rename = "contentKeys", default, skip_serializing_if = "Option::is_none")]
@@ -2192,10 +2248,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -2506,7 +2571,11 @@ pub struct Filters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub crop: Option<Rectangle>,
     #[doc = "The properties of overlays to be applied to the input video. These could be audio, image or video overlays."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub overlays: Vec<Overlay>,
 }
 impl Filters {
@@ -2744,7 +2813,11 @@ pub struct H264Video {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub complexity: Option<h264_video::Complexity>,
     #[doc = "The collection of output H.264 layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<H264Layer>,
     #[doc = "The video rate control mode"]
     #[serde(rename = "rateControlMode", default, skip_serializing_if = "Option::is_none")]
@@ -2935,7 +3008,11 @@ pub struct H265Video {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub complexity: Option<h265_video::Complexity>,
     #[doc = "The collection of output H.265 layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<H265Layer>,
 }
 impl H265Video {
@@ -3060,7 +3137,11 @@ impl HlsSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IpAccessControl {
     #[doc = "The IP allow list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allow: Vec<IpRange>,
 }
 impl IpAccessControl {
@@ -3128,7 +3209,12 @@ pub struct InputDefinition {
     #[serde(rename = "@odata.type")]
     pub odata_type: String,
     #[doc = "The list of TrackDescriptors which define the metadata and selection of tracks in the input."]
-    #[serde(rename = "includedTracks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedTracks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_tracks: Vec<TrackDescriptor>,
 }
 impl InputDefinition {
@@ -3177,7 +3263,11 @@ impl Job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCollection {
     #[doc = "A collection of Job items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3210,7 +3300,11 @@ pub struct JobError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub retry: Option<job_error::Retry>,
     #[doc = "An array of details about specific errors that led to this reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<JobErrorDetail>,
 }
 impl JobError {
@@ -3402,7 +3496,11 @@ pub struct JobInputClip {
     #[serde(flatten)]
     pub job_input: JobInput,
     #[doc = "List of files. Required for JobInputHttp. Maximum of 4000 characters each. Query strings will not be returned in service responses to prevent sensitive data exposure."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<String>,
     #[doc = "Base class for specifying a clip time. Use sub classes of this class to specify the time position in the media."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3414,7 +3512,12 @@ pub struct JobInputClip {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub label: Option<String>,
     #[doc = "Defines a list of InputDefinitions. For each InputDefinition, it defines a list of track selections and related metadata."]
-    #[serde(rename = "inputDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputDefinitions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_definitions: Vec<InputDefinition>,
 }
 impl JobInputClip {
@@ -3452,7 +3555,11 @@ pub struct JobInputSequence {
     #[serde(flatten)]
     pub job_input: JobInput,
     #[doc = "JobInputs that make up the timeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<JobInputClip>,
 }
 impl JobInputSequence {
@@ -3469,7 +3576,11 @@ pub struct JobInputs {
     #[serde(flatten)]
     pub job_input: JobInput,
     #[doc = "List of inputs to a Job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<JobInput>,
 }
 impl JobInputs {
@@ -3740,7 +3851,11 @@ pub struct JpgImage {
     #[serde(flatten)]
     pub image: Image,
     #[doc = "A collection of output JPEG image layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<JpgLayer>,
     #[doc = "Sets the number of columns used in thumbnail sprite image.  The number of rows are automatically calculated and a VTT file is generated with the coordinate mappings for each thumbnail in the sprite. Note: this value should be a positive integer and a proper value is recommended so that the output image resolution will not go beyond JPEG maximum pixel resolution limit 65535x65535."]
     #[serde(rename = "spriteColumn", default, skip_serializing_if = "Option::is_none")]
@@ -3872,7 +3987,12 @@ pub mod list_container_sas_input {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListContentKeysResponse {
     #[doc = "ContentKeys used by current Streaming Locator"]
-    #[serde(rename = "contentKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_keys: Vec<StreamingLocatorContentKey>,
 }
 impl ListContentKeysResponse {
@@ -3895,10 +4015,20 @@ impl ListEdgePoliciesInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListPathsResponse {
     #[doc = "Streaming Paths supported by current Streaming Locator"]
-    #[serde(rename = "streamingPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "streamingPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub streaming_paths: Vec<StreamingPath>,
     #[doc = "Download Paths supported by current Streaming Locator"]
-    #[serde(rename = "downloadPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "downloadPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub download_paths: Vec<String>,
 }
 impl ListPathsResponse {
@@ -3910,7 +4040,12 @@ impl ListPathsResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListStreamingLocatorsResponse {
     #[doc = "The list of Streaming Locators."]
-    #[serde(rename = "streamingLocators", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "streamingLocators",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub streaming_locators: Vec<AssetStreamingLocator>,
 }
 impl ListStreamingLocatorsResponse {
@@ -4088,7 +4223,11 @@ pub struct LiveEventInput {
     #[serde(rename = "accessToken", default, skip_serializing_if = "Option::is_none")]
     pub access_token: Option<String>,
     #[doc = "The input endpoints for the live event."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<LiveEventEndpoint>,
 }
 impl LiveEventInput {
@@ -4178,7 +4317,11 @@ impl LiveEventInputTrackSelection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LiveEventListResult {
     #[doc = "The result of the List Live Event operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LiveEvent>,
     #[doc = "The number of result."]
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
@@ -4214,7 +4357,11 @@ impl LiveEventOutputTranscriptionTrack {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LiveEventPreview {
     #[doc = "The endpoints for preview. Do not share the preview URL with the live event audience."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<LiveEventEndpoint>,
     #[doc = "The IP access control for the live event preview endpoint."]
     #[serde(rename = "accessControl", default, skip_serializing_if = "Option::is_none")]
@@ -4261,7 +4408,11 @@ pub struct LiveEventProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encoding: Option<LiveEventEncoding>,
     #[doc = "Live transcription settings for the live event. See https://go.microsoft.com/fwlink/?linkid=2133742 for more information about the live transcription feature."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transcriptions: Vec<LiveEventTranscription>,
     #[doc = "The provisioning state of the live event."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -4279,7 +4430,12 @@ pub struct LiveEventProperties {
     #[serde(rename = "hostnamePrefix", default, skip_serializing_if = "Option::is_none")]
     pub hostname_prefix: Option<String>,
     #[doc = "The options to use for the LiveEvent. This value is specified at creation time and cannot be updated. The valid values for the array entry values are 'Default' and 'LowLatency'."]
-    #[serde(rename = "streamOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "streamOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub stream_options: Vec<String>,
     #[doc = "The creation time for the live event"]
     #[serde(default, with = "azure_core::date::rfc3339::option")]
@@ -4364,7 +4520,12 @@ pub struct LiveEventTranscription {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub language: Option<String>,
     #[doc = "Provides a mechanism to select the audio track in the input live feed, to which speech-to-text transcription is applied. This property is reserved for future use, any value set on this property will be ignored."]
-    #[serde(rename = "inputTrackSelection", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputTrackSelection",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_track_selection: Vec<LiveEventInputTrackSelection>,
     #[doc = "Describes a transcription track in the output of a live event, generated using speech-to-text transcription. This property is reserved for future use, any value set on this property will be ignored."]
     #[serde(rename = "outputTranscriptionTrack", default, skip_serializing_if = "Option::is_none")]
@@ -4396,7 +4557,11 @@ impl LiveOutput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LiveOutputListResult {
     #[doc = "The result of the List LiveOutput operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LiveOutput>,
     #[doc = "The number of result."]
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
@@ -4540,7 +4705,11 @@ pub struct MediaFilterProperties {
     #[serde(rename = "firstQuality", default, skip_serializing_if = "Option::is_none")]
     pub first_quality: Option<FirstQuality>,
     #[doc = "The tracks selection conditions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tracks: Vec<FilterTrackSelection>,
 }
 impl MediaFilterProperties {
@@ -4576,7 +4745,11 @@ impl MediaService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MediaServiceCollection {
     #[doc = "A collection of MediaService items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MediaService>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4657,7 +4830,12 @@ pub struct MediaServiceProperties {
     #[serde(rename = "mediaServiceId", default, skip_serializing_if = "Option::is_none")]
     pub media_service_id: Option<String>,
     #[doc = "The storage accounts for this resource."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<StorageAccount>,
     #[serde(rename = "storageAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub storage_authentication: Option<media_service_properties::StorageAuthentication>,
@@ -4672,7 +4850,12 @@ pub struct MediaServiceProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<media_service_properties::ProvisioningState>,
     #[doc = "The Private Endpoint Connections created for the Media Service account."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl MediaServiceProperties {
@@ -4852,10 +5035,19 @@ pub struct MetricSpecification {
     #[serde(rename = "lockAggregationType", default, skip_serializing_if = "Option::is_none")]
     pub lock_aggregation_type: Option<metric_specification::LockAggregationType>,
     #[doc = "Supported aggregation types."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The metric dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Indicates whether regional MDM account is enabled."]
     #[serde(rename = "enableRegionalMdmAccount", default, skip_serializing_if = "Option::is_none")]
@@ -4867,7 +5059,12 @@ pub struct MetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "The supported time grain types."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
 }
 impl MetricSpecification {
@@ -5012,7 +5209,12 @@ pub struct MultiBitrateFormat {
     #[serde(flatten)]
     pub format: Format,
     #[doc = "The list of output files to produce.  Each entry in the list is a set of audio and video layer labels to be muxed together ."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
 }
 impl MultiBitrateFormat {
@@ -5110,7 +5312,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationCollection {
     #[doc = "A collection of Operation items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationCollection {
@@ -5205,7 +5411,11 @@ pub struct PngImage {
     #[serde(flatten)]
     pub image: Image,
     #[doc = "A collection of output PNG image layers to be produced by the encoder."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<PngLayer>,
 }
 impl PngImage {
@@ -5405,7 +5615,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -5533,7 +5747,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -5548,10 +5766,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -5910,10 +6138,20 @@ impl SelectVideoTrackById {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "List of log specifications."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "List of metric specifications."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -6016,7 +6254,12 @@ pub struct StorageEncryptedAssetDecryptionData {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub key: Option<String>,
     #[doc = "Asset File encryption metadata."]
-    #[serde(rename = "assetFileEncryptionMetadata", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assetFileEncryptionMetadata",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub asset_file_encryption_metadata: Vec<AssetFileEncryptionMetadata>,
 }
 impl StorageEncryptedAssetDecryptionData {
@@ -6068,7 +6311,11 @@ impl StreamingEndpointAccessControl {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingEndpointListResult {
     #[doc = "The result of the List StreamingEndpoint operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingEndpoint>,
     #[doc = "The number of result."]
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
@@ -6107,7 +6354,12 @@ pub struct StreamingEndpointProperties {
     #[serde(rename = "maxCacheAge", default, skip_serializing_if = "Option::is_none")]
     pub max_cache_age: Option<i64>,
     #[doc = "The custom host names of the streaming endpoint"]
-    #[serde(rename = "customHostNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customHostNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_host_names: Vec<String>,
     #[doc = "The streaming endpoint host name."]
     #[serde(rename = "hostName", default, skip_serializing_if = "Option::is_none")]
@@ -6213,7 +6465,11 @@ pub mod streaming_endpoint_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingEndpointSkuInfoListResult {
     #[doc = "The result of the List StreamingEndpoint skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArmStreamingEndpointSkuInfo>,
 }
 impl StreamingEndpointSkuInfoListResult {
@@ -6254,7 +6510,11 @@ impl StreamingLocator {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingLocatorCollection {
     #[doc = "A collection of StreamingLocator items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingLocator>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6289,7 +6549,11 @@ pub struct StreamingLocatorContentKey {
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
     pub policy_name: Option<String>,
     #[doc = "Tracks which use this Content Key"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tracks: Vec<TrackSelection>,
 }
 impl StreamingLocatorContentKey {
@@ -6371,13 +6635,22 @@ pub struct StreamingLocatorProperties {
     #[serde(rename = "defaultContentKeyPolicyName", default, skip_serializing_if = "Option::is_none")]
     pub default_content_key_policy_name: Option<String>,
     #[doc = "The ContentKeys used by this Streaming Locator."]
-    #[serde(rename = "contentKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contentKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub content_keys: Vec<StreamingLocatorContentKey>,
     #[doc = "Alternative Media ID of this Streaming Locator"]
     #[serde(rename = "alternativeMediaId", default, skip_serializing_if = "Option::is_none")]
     pub alternative_media_id: Option<String>,
     #[doc = "A list of asset or account filters which apply to this streaming locator"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<String>,
 }
 impl StreamingLocatorProperties {
@@ -6406,7 +6679,11 @@ pub struct StreamingPath {
     #[serde(rename = "encryptionScheme")]
     pub encryption_scheme: streaming_path::EncryptionScheme,
     #[doc = "Streaming paths for each protocol and encryptionScheme pair"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<String>,
 }
 impl StreamingPath {
@@ -6524,7 +6801,11 @@ impl StreamingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingPolicyCollection {
     #[doc = "A collection of StreamingPolicy items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingPolicy>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6551,7 +6832,11 @@ pub struct StreamingPolicyContentKey {
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
     pub policy_name: Option<String>,
     #[doc = "Tracks which use this content key"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tracks: Vec<TrackSelection>,
 }
 impl StreamingPolicyContentKey {
@@ -6566,7 +6851,12 @@ pub struct StreamingPolicyContentKeys {
     #[serde(rename = "defaultKey", default, skip_serializing_if = "Option::is_none")]
     pub default_key: Option<DefaultKey>,
     #[doc = "Representing tracks needs separate content key"]
-    #[serde(rename = "keyToTrackMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyToTrackMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_to_track_mappings: Vec<StreamingPolicyContentKey>,
 }
 impl StreamingPolicyContentKeys {
@@ -6857,7 +7147,12 @@ pub mod track_property_condition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrackSelection {
     #[doc = "TrackSelections is a track property condition list which can specify track(s)"]
-    #[serde(rename = "trackSelections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trackSelections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub track_selections: Vec<TrackPropertyCondition>,
 }
 impl TrackSelection {
@@ -6906,7 +7201,11 @@ impl Transform {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransformCollection {
     #[doc = "A collection of Transform items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Transform>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/migrate/src/package_2018_02/models.rs b/services/mgmt/migrate/src/package_2018_02/models.rs
index 3fd8de79da..1c55d22c26 100644
--- a/services/mgmt/migrate/src/package_2018_02/models.rs
+++ b/services/mgmt/migrate/src/package_2018_02/models.rs
@@ -358,7 +358,11 @@ impl AssessedMachine {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssessedMachineProperties {
     #[doc = "List of references to the groups that the machine is member of."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<String>,
     #[doc = "Time when this machine was discovered by Azure Migrate agent. Date-Time represented in ISO-8601 format."]
     #[serde(rename = "discoveredTimestamp", default, with = "azure_core::date::rfc3339::option")]
@@ -1027,7 +1031,11 @@ pub mod assessed_machine_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssessedMachineResultList {
     #[doc = "List of assessed machines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AssessedMachine>,
 }
 impl azure_core::Continuable for AssessedMachineResultList {
@@ -1048,7 +1056,12 @@ pub struct AssessedNetworkAdapter {
     #[serde(rename = "macAddress", default, skip_serializing_if = "Option::is_none")]
     pub mac_address: Option<String>,
     #[doc = "List of IP Addresses on the network adapter."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "Monthly cost estimate for network bandwidth used by this network adapter."]
     #[serde(rename = "monthlyBandwidthCosts", default, skip_serializing_if = "Option::is_none")]
@@ -1220,10 +1233,20 @@ impl Assessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssessmentOptionsResultList {
     #[doc = "Dictionary of VM families grouped by vm family name describing the targeted azure locations of VM family and the category of the family."]
-    #[serde(rename = "vmFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_families: Vec<VmFamily>,
     #[doc = "List of supported VM Families."]
-    #[serde(rename = "reservedInstanceVmFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservedInstanceVmFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reserved_instance_vm_families: Vec<String>,
 }
 impl AssessmentOptionsResultList {
@@ -2011,7 +2034,11 @@ pub mod assessment_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssessmentResultList {
     #[doc = "List of assessments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Assessment>,
 }
 impl azure_core::Continuable for AssessmentResultList {
@@ -2107,7 +2134,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -2180,7 +2211,11 @@ pub struct GroupProperties {
     #[doc = "List of machine names that are part of this group."]
     pub machines: Vec<String>,
     #[doc = "List of References to Assessments created on this group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assessments: Vec<String>,
     #[doc = "Time when this project was created. Date-Time represented in ISO-8601 format."]
     #[serde(rename = "createdTimestamp", default, with = "azure_core::date::rfc3339::option")]
@@ -2203,7 +2238,11 @@ impl GroupProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GroupResultList {
     #[doc = "List of groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Group>,
 }
 impl azure_core::Continuable for GroupResultList {
@@ -2275,7 +2314,11 @@ pub struct MachineProperties {
     #[serde(rename = "operatingSystem", default, skip_serializing_if = "Option::is_none")]
     pub operating_system: Option<String>,
     #[doc = "List of references to the groups that the machine is member of."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<String>,
     #[doc = "Time when this machine was created. Date-Time represented in ISO-8601 format."]
     #[serde(rename = "createdTimestamp", default, with = "azure_core::date::rfc3339::option")]
@@ -2346,7 +2389,11 @@ pub mod machine_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MachineResultList {
     #[doc = "List of machines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Machine>,
 }
 impl azure_core::Continuable for MachineResultList {
@@ -2367,7 +2414,12 @@ pub struct NetworkAdapter {
     #[serde(rename = "macAddress", default, skip_serializing_if = "Option::is_none")]
     pub mac_address: Option<String>,
     #[doc = "List of IP Addresses on the network adapter."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
 }
 impl NetworkAdapter {
@@ -2418,7 +2470,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationResultList {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationResultList {
@@ -2615,7 +2671,11 @@ pub mod project_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProjectResultList {
     #[doc = "List of projects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Project>,
 }
 impl azure_core::Continuable for ProjectResultList {
@@ -2636,10 +2696,19 @@ pub struct VmFamily {
     #[serde(rename = "familyName", default, skip_serializing_if = "Option::is_none")]
     pub family_name: Option<String>,
     #[doc = "List of Azure regions."]
-    #[serde(rename = "targetLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_locations: Vec<String>,
     #[doc = "Category of the VM family."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub category: Vec<String>,
 }
 impl VmFamily {
diff --git a/services/mgmt/migrate/src/package_2019_10/models.rs b/services/mgmt/migrate/src/package_2019_10/models.rs
index f576d2a659..5f844b1809 100644
--- a/services/mgmt/migrate/src/package_2019_10/models.rs
+++ b/services/mgmt/migrate/src/package_2019_10/models.rs
@@ -1272,7 +1272,11 @@ pub mod assessed_machine_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssessedMachineResultList {
     #[doc = "List of assessed machines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AssessedMachine>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1295,7 +1299,12 @@ pub struct AssessedNetworkAdapter {
     #[serde(rename = "macAddress", default, skip_serializing_if = "Option::is_none")]
     pub mac_address: Option<String>,
     #[doc = "List of IP Addresses on the network adapter."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "User friendly name of the assessed network adapter."]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
@@ -1509,19 +1518,44 @@ impl AssessmentOptions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssessmentOptionsProperties {
     #[doc = "Dictionary of VM families grouped by vm family name describing the targeted azure locations of VM family and the category of the family."]
-    #[serde(rename = "vmFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_families: Vec<VmFamily>,
     #[doc = "List of supported VM Families."]
-    #[serde(rename = "reservedInstanceVmFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservedInstanceVmFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reserved_instance_vm_families: Vec<String>,
     #[doc = "List of supported Azure regions for reserved instances."]
-    #[serde(rename = "reservedInstanceSupportedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservedInstanceSupportedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reserved_instance_supported_locations: Vec<String>,
     #[doc = "List of supported currencies for reserved instances."]
-    #[serde(rename = "reservedInstanceSupportedCurrencies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservedInstanceSupportedCurrencies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reserved_instance_supported_currencies: Vec<String>,
     #[doc = "List of supported Azure offer codes for reserved instances."]
-    #[serde(rename = "reservedInstanceSupportedOffers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservedInstanceSupportedOffers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reserved_instance_supported_offers: Vec<String>,
 }
 impl AssessmentOptionsProperties {
@@ -1533,7 +1567,11 @@ impl AssessmentOptionsProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssessmentOptionsResultList {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AssessmentOptions>,
 }
 impl azure_core::Continuable for AssessmentOptionsResultList {
@@ -2481,7 +2519,11 @@ pub mod assessment_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AssessmentResultList {
     #[doc = "List of assessments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Assessment>,
 }
 impl azure_core::Continuable for AssessmentResultList {
@@ -2526,7 +2568,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -2658,7 +2704,11 @@ pub struct GroupBodyProperties {
     #[serde(rename = "operationType", default, skip_serializing_if = "Option::is_none")]
     pub operation_type: Option<group_body_properties::OperationType>,
     #[doc = "List of machine names that are part of this group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub machines: Vec<String>,
 }
 impl GroupBodyProperties {
@@ -2716,7 +2766,11 @@ pub struct GroupProperties {
     #[serde(rename = "machineCount", default, skip_serializing_if = "Option::is_none")]
     pub machine_count: Option<i32>,
     #[doc = "List of References to Assessments created on this group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assessments: Vec<String>,
     #[doc = "If the assessments are in running state."]
     #[serde(rename = "areAssessmentsRunning", default, skip_serializing_if = "Option::is_none")]
@@ -2786,7 +2840,11 @@ pub mod group_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GroupResultList {
     #[doc = "List of groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Group>,
 }
 impl azure_core::Continuable for GroupResultList {
@@ -2822,7 +2880,11 @@ impl HyperVCollector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HyperVCollectorList {
     #[doc = "List of Hyper-V collectors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HyperVCollector>,
 }
 impl azure_core::Continuable for HyperVCollectorList {
@@ -2858,7 +2920,11 @@ impl ImportCollector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImportCollectorList {
     #[doc = "List of Import collectors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImportCollector>,
 }
 impl azure_core::Continuable for ImportCollectorList {
@@ -2947,7 +3013,11 @@ pub struct MachineProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of references to the groups that the machine is member of."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<String>,
     #[doc = "Time when this machine was created. Date-Time represented in ISO-8601 format."]
     #[serde(rename = "createdTimestamp", default, with = "azure_core::date::rfc3339::option")]
@@ -3015,7 +3085,11 @@ pub mod machine_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MachineResultList {
     #[doc = "List of machines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Machine>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -3038,7 +3112,12 @@ pub struct NetworkAdapter {
     #[serde(rename = "macAddress", default, skip_serializing_if = "Option::is_none")]
     pub mac_address: Option<String>,
     #[doc = "List of IP Addresses on the network adapter."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "User friendly name of the network adapter."]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
@@ -3092,7 +3171,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationResultList {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationResultList {
@@ -3139,7 +3222,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionCollection {
     #[doc = "A list of private endpoint connections for a project."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -3203,7 +3290,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceCollection {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3218,10 +3309,20 @@ impl PrivateLinkResourceCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceProperties {
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "The private link resource group id."]
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
@@ -3331,7 +3432,12 @@ pub struct ProjectProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<String>,
     #[doc = "The list of private endpoint connections to the project."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The ARM id of the storage account used for interactions when public access is disabled."]
     #[serde(rename = "customerStorageAccountArmId", default, skip_serializing_if = "Option::is_none")]
@@ -3434,7 +3540,11 @@ pub mod project_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProjectResultList {
     #[doc = "List of projects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Project>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -3483,7 +3593,11 @@ impl ServerCollector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerCollectorList {
     #[doc = "List of Server collectors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerCollector>,
 }
 impl azure_core::Continuable for ServerCollectorList {
@@ -3534,7 +3648,11 @@ impl VMwareCollector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VMwareCollectorList {
     #[doc = "List of VMware collectors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VMwareCollector>,
 }
 impl azure_core::Continuable for VMwareCollectorList {
@@ -3555,10 +3673,19 @@ pub struct VmFamily {
     #[serde(rename = "familyName", default, skip_serializing_if = "Option::is_none")]
     pub family_name: Option<String>,
     #[doc = "List of Azure regions."]
-    #[serde(rename = "targetLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_locations: Vec<String>,
     #[doc = "Category of the VM family."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub category: Vec<String>,
 }
 impl VmFamily {
diff --git a/services/mgmt/migrate/src/package_2020_01/models.rs b/services/mgmt/migrate/src/package_2020_01/models.rs
index a3c9caf53a..c8944e7cea 100644
--- a/services/mgmt/migrate/src/package_2020_01/models.rs
+++ b/services/mgmt/migrate/src/package_2020_01/models.rs
@@ -57,31 +57,74 @@ impl Application {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AppsAndRoles {
     #[doc = "Applications of the AppsAndRoles."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applications: Vec<Application>,
     #[doc = "WebApplications of the AppsAndRoles."]
-    #[serde(rename = "webApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "webApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub web_applications: Vec<WebApplication>,
     #[doc = "Features of the AppsAndRoles."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<Feature>,
     #[doc = "SQLServers of the AppsAndRoles."]
-    #[serde(rename = "sqlServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sqlServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sql_servers: Vec<SqlServer>,
     #[doc = "SharePointServers of the AppsAndRoles."]
-    #[serde(rename = "sharePointServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharePointServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_point_servers: Vec<SharePointServer>,
     #[doc = "SystemCenters of the AppsAndRoles."]
-    #[serde(rename = "systemCenters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "systemCenters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub system_centers: Vec<SystemCenter>,
     #[doc = "BizTalkServers of the AppsAndRoles."]
-    #[serde(rename = "bizTalkServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bizTalkServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub biz_talk_servers: Vec<BizTalkServer>,
     #[doc = "ExchangeServers of the AppsAndRoles."]
-    #[serde(rename = "exchangeServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exchangeServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exchange_servers: Vec<ExchangeServer>,
     #[doc = "OtherDatabaseServers of the AppsAndRoles."]
-    #[serde(rename = "otherDatabases", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "otherDatabases",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub other_databases: Vec<OtherDatabase>,
 }
 impl AppsAndRoles {
@@ -277,7 +320,11 @@ impl HyperVCluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HyperVClusterCollection {
     #[doc = "List of clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HyperVCluster>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -316,10 +363,19 @@ pub struct HyperVClusterProperties {
     #[serde(rename = "runAsAccountId", default, skip_serializing_if = "Option::is_none")]
     pub run_as_account_id: Option<String>,
     #[doc = "List of hosts (FQDN) currently being tracked by the cluster."]
-    #[serde(rename = "hostFqdnList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostFqdnList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub host_fqdn_list: Vec<String>,
     #[doc = "Errors for Hyper-V clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<HealthErrorDetails>,
 }
 impl HyperVClusterProperties {
@@ -382,7 +438,11 @@ impl HyperVHost {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HyperVHostCollection {
     #[doc = "List of hosts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HyperVHost>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -418,7 +478,11 @@ pub struct HyperVHostProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "Errors for Hyper-V hosts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<HealthErrorDetails>,
 }
 impl HyperVHostProperties {
@@ -451,7 +515,11 @@ impl HyperVJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HyperVJobCollection {
     #[doc = "List of jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HyperVJob>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -493,7 +561,11 @@ impl HyperVMachine {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HyperVMachineCollection {
     #[doc = "List of machines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HyperVMachine>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -547,13 +619,22 @@ pub struct HyperVMachineProperties {
     #[serde(rename = "isDynamicMemoryEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_dynamic_memory_enabled: Option<bool>,
     #[doc = "Disks attached to the machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<HyperVDisk>,
     #[doc = "AppsAndRoles in the guest virtual machine."]
     #[serde(rename = "appsAndRoles", default, skip_serializing_if = "Option::is_none")]
     pub apps_and_roles: Option<AppsAndRoles>,
     #[doc = "Network adapters attached to the machine."]
-    #[serde(rename = "networkAdapters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAdapters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_adapters: Vec<HyperVNetworkAdapter>,
     #[doc = "Display name of the machine."]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
@@ -607,7 +688,11 @@ pub struct HyperVMachineProperties {
     #[serde(rename = "isDeleted", default, skip_serializing_if = "Option::is_none")]
     pub is_deleted: Option<bool>,
     #[doc = "Errors for machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<HealthErrorDetails>,
 }
 impl HyperVMachineProperties {
@@ -647,7 +732,12 @@ pub struct HyperVNetworkAdapter {
     #[serde(rename = "macAddress", default, skip_serializing_if = "Option::is_none")]
     pub mac_address: Option<String>,
     #[doc = "IP addresses for the machine."]
-    #[serde(rename = "ipAddressList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddressList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_address_list: Vec<String>,
     #[doc = "Network Name."]
     #[serde(rename = "networkName", default, skip_serializing_if = "Option::is_none")]
@@ -686,7 +776,11 @@ impl HyperVRunAsAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HyperVRunAsAccountCollection {
     #[doc = "List of run as accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HyperVRunAsAccount>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -819,7 +913,11 @@ pub struct JobProperties {
     #[serde(rename = "activityId", default, skip_serializing_if = "Option::is_none")]
     pub activity_id: Option<String>,
     #[doc = "Errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ErrorDetails>,
 }
 impl JobProperties {
@@ -922,19 +1020,54 @@ pub mod machine_resources_configuration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkConfiguration {
-    #[serde(rename = "ipv4Interfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv4Interfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv4_interfaces: Vec<Ipv4NetworkInterface>,
-    #[serde(rename = "ipv6Interfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv6Interfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv6_interfaces: Vec<Ipv6NetworkInterface>,
-    #[serde(rename = "defaultIpv4Gateways", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultIpv4Gateways",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_ipv4_gateways: Vec<String>,
-    #[serde(rename = "macAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "macAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mac_addresses: Vec<String>,
-    #[serde(rename = "dnsNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_names: Vec<String>,
-    #[serde(rename = "dnsQuestions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsQuestions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_questions: Vec<String>,
-    #[serde(rename = "dnsCanonicalNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsCanonicalNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_canonical_names: Vec<String>,
 }
 impl NetworkConfiguration {
@@ -1047,7 +1180,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationResultList {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1314,7 +1451,12 @@ pub struct SiteHealthSummary {
     #[serde(rename = "affectedResourceType", default, skip_serializing_if = "Option::is_none")]
     pub affected_resource_type: Option<String>,
     #[doc = "Affected resources."]
-    #[serde(rename = "affectedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "affectedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub affected_resources: Vec<String>,
 }
 impl SiteHealthSummary {
@@ -1326,7 +1468,11 @@ impl SiteHealthSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SiteHealthSummaryCollection {
     #[doc = "List of SiteHealthSummary."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SiteHealthSummary>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1447,7 +1593,11 @@ impl VCenter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VCenterCollection {
     #[doc = "List of vCenter."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VCenter>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1492,7 +1642,11 @@ pub struct VCenterProperties {
     #[serde(rename = "instanceUuid", default, skip_serializing_if = "Option::is_none")]
     pub instance_uuid: Option<String>,
     #[doc = "Error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<HealthErrorDetails>,
 }
 impl VCenterProperties {
@@ -1618,7 +1772,11 @@ impl VMwareJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VMwareJobCollection {
     #[doc = "List of jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VMwareJob>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1660,7 +1818,11 @@ impl VMwareMachine {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VMwareMachineCollection {
     #[doc = "List of machines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VMwareMachine>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1708,7 +1870,11 @@ pub struct VMwareMachineProperties {
     #[serde(rename = "maxSnapshots", default, skip_serializing_if = "Option::is_none")]
     pub max_snapshots: Option<i32>,
     #[doc = "Disks attached to the machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<VMwareDisk>,
     #[doc = "AppsAndRoles in the guest virtual machine."]
     #[serde(rename = "appsAndRoles", default, skip_serializing_if = "Option::is_none")]
@@ -1726,7 +1892,12 @@ pub struct VMwareMachineProperties {
     #[serde(rename = "hostVersion", default, skip_serializing_if = "Option::is_none")]
     pub host_version: Option<String>,
     #[doc = "Network adapters attached to the machine."]
-    #[serde(rename = "networkAdapters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAdapters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_adapters: Vec<VMwareNetworkAdapter>,
     #[doc = "If dependency mapping feature is enabled or not for the VM."]
     #[serde(rename = "dependencyMapping", default, skip_serializing_if = "Option::is_none")]
@@ -1786,7 +1957,11 @@ pub struct VMwareMachineProperties {
     #[serde(rename = "isDeleted", default, skip_serializing_if = "Option::is_none")]
     pub is_deleted: Option<bool>,
     #[doc = "Errors for machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<HealthErrorDetails>,
 }
 impl VMwareMachineProperties {
@@ -1807,7 +1982,12 @@ pub struct VMwareNetworkAdapter {
     #[serde(rename = "macAddress", default, skip_serializing_if = "Option::is_none")]
     pub mac_address: Option<String>,
     #[doc = "IP addresses for the machine."]
-    #[serde(rename = "ipAddressList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddressList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_address_list: Vec<String>,
     #[doc = "Network Name."]
     #[serde(rename = "networkName", default, skip_serializing_if = "Option::is_none")]
@@ -1846,7 +2026,11 @@ impl VMwareRunAsAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VMwareRunAsAccountCollection {
     #[doc = "List of run as accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VMwareRunAsAccount>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/migrate/src/package_2020_05/models.rs b/services/mgmt/migrate/src/package_2020_05/models.rs
index e1be8af24d..b98d38c0c3 100644
--- a/services/mgmt/migrate/src/package_2020_05/models.rs
+++ b/services/mgmt/migrate/src/package_2020_05/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -55,7 +59,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -109,7 +117,12 @@ impl MigrateProject {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrateProjectProperties {
     #[doc = "Register tools inside project."]
-    #[serde(rename = "registeredTools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "registeredTools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub registered_tools: Vec<String>,
     #[doc = "Service endpoint."]
     #[serde(rename = "serviceEndpoint", default, skip_serializing_if = "Option::is_none")]
@@ -130,7 +143,12 @@ pub struct MigrateProjectProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<migrate_project_properties::PublicNetworkAccess>,
     #[doc = "Gets the private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl MigrateProjectProperties {
@@ -284,7 +302,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionCollection {
     #[doc = "Gets the list of machines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Gets the value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -348,7 +370,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceCollection {
     #[doc = "List of private links."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -363,10 +389,20 @@ impl PrivateLinkResourceCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceProperties {
     #[doc = "Required members."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required zone names."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "Group id."]
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
@@ -443,7 +479,11 @@ pub mod private_link_service_connection_state {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProjectResultList {
     #[doc = "List of projects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrateProject>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
diff --git a/services/mgmt/migrate/src/package_2020_07/models.rs b/services/mgmt/migrate/src/package_2020_07/models.rs
index 215a2716a7..c826cb5ef3 100644
--- a/services/mgmt/migrate/src/package_2020_07/models.rs
+++ b/services/mgmt/migrate/src/package_2020_07/models.rs
@@ -57,31 +57,74 @@ impl Application {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AppsAndRoles {
     #[doc = "Applications of the AppsAndRoles."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applications: Vec<Application>,
     #[doc = "WebApplications of the AppsAndRoles."]
-    #[serde(rename = "webApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "webApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub web_applications: Vec<WebApplication>,
     #[doc = "Features of the AppsAndRoles."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<Feature>,
     #[doc = "SQLServers of the AppsAndRoles."]
-    #[serde(rename = "sqlServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sqlServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sql_servers: Vec<SqlServer>,
     #[doc = "SharePointServers of the AppsAndRoles."]
-    #[serde(rename = "sharePointServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharePointServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub share_point_servers: Vec<SharePointServer>,
     #[doc = "SystemCenters of the AppsAndRoles."]
-    #[serde(rename = "systemCenters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "systemCenters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub system_centers: Vec<SystemCenter>,
     #[doc = "BizTalkServers of the AppsAndRoles."]
-    #[serde(rename = "bizTalkServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bizTalkServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub biz_talk_servers: Vec<BizTalkServer>,
     #[doc = "ExchangeServers of the AppsAndRoles."]
-    #[serde(rename = "exchangeServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exchangeServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exchange_servers: Vec<ExchangeServer>,
     #[doc = "OtherDatabaseServers of the AppsAndRoles."]
-    #[serde(rename = "otherDatabases", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "otherDatabases",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub other_databases: Vec<OtherDatabase>,
 }
 impl AppsAndRoles {
@@ -93,7 +136,11 @@ impl AppsAndRoles {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperations {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationDetail>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -156,7 +203,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -337,7 +388,11 @@ impl HyperVCluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HyperVClusterCollection {
     #[doc = "List of clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HyperVCluster>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -376,10 +431,19 @@ pub struct HyperVClusterProperties {
     #[serde(rename = "runAsAccountId", default, skip_serializing_if = "Option::is_none")]
     pub run_as_account_id: Option<String>,
     #[doc = "List of hosts (FQDN) currently being tracked by the cluster."]
-    #[serde(rename = "hostFqdnList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostFqdnList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub host_fqdn_list: Vec<String>,
     #[doc = "Errors for Hyper-V clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<HealthErrorDetails>,
 }
 impl HyperVClusterProperties {
@@ -442,7 +506,11 @@ impl HyperVHost {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HyperVHostCollection {
     #[doc = "List of hosts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HyperVHost>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -478,7 +546,11 @@ pub struct HyperVHostProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "Errors for Hyper-V hosts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<HealthErrorDetails>,
 }
 impl HyperVHostProperties {
@@ -511,7 +583,11 @@ impl HyperVJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HyperVJobCollection {
     #[doc = "List of jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HyperVJob>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -553,7 +629,11 @@ impl HyperVMachine {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HyperVMachineCollection {
     #[doc = "List of machines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HyperVMachine>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -607,13 +687,22 @@ pub struct HyperVMachineProperties {
     #[serde(rename = "isDynamicMemoryEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_dynamic_memory_enabled: Option<bool>,
     #[doc = "Disks attached to the machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<HyperVDisk>,
     #[doc = "AppsAndRoles in the guest virtual machine."]
     #[serde(rename = "appsAndRoles", default, skip_serializing_if = "Option::is_none")]
     pub apps_and_roles: Option<AppsAndRoles>,
     #[doc = "Network adapters attached to the machine."]
-    #[serde(rename = "networkAdapters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAdapters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_adapters: Vec<HyperVNetworkAdapter>,
     #[doc = "Display name of the machine."]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
@@ -667,7 +756,11 @@ pub struct HyperVMachineProperties {
     #[serde(rename = "isDeleted", default, skip_serializing_if = "Option::is_none")]
     pub is_deleted: Option<bool>,
     #[doc = "Errors for machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<HealthErrorDetails>,
 }
 impl HyperVMachineProperties {
@@ -707,7 +800,12 @@ pub struct HyperVNetworkAdapter {
     #[serde(rename = "macAddress", default, skip_serializing_if = "Option::is_none")]
     pub mac_address: Option<String>,
     #[doc = "IP addresses for the machine."]
-    #[serde(rename = "ipAddressList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddressList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_address_list: Vec<String>,
     #[doc = "Network Name."]
     #[serde(rename = "networkName", default, skip_serializing_if = "Option::is_none")]
@@ -746,7 +844,11 @@ impl HyperVRunAsAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HyperVRunAsAccountCollection {
     #[doc = "List of run as accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HyperVRunAsAccount>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -820,7 +922,11 @@ impl HyperVSiteUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HyperVSitesResultList {
     #[doc = "List of sites."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HyperVSite>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -902,7 +1008,11 @@ pub struct JobProperties {
     #[serde(rename = "activityId", default, skip_serializing_if = "Option::is_none")]
     pub activity_id: Option<String>,
     #[doc = "Error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ErrorDetails>,
 }
 impl JobProperties {
@@ -1037,7 +1147,11 @@ impl MasterSite {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MasterSiteList {
     #[doc = "List of projects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MasterSite>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1063,13 +1177,22 @@ pub struct MasterSiteProperties {
     #[serde(rename = "allowMultipleSites", default, skip_serializing_if = "Option::is_none")]
     pub allow_multiple_sites: Option<bool>,
     #[doc = "List of sites that are a part of Master Site."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sites: Vec<String>,
     #[doc = "Gets or sets a value for customer storage account ARM id."]
     #[serde(rename = "customerStorageAccountArmId", default, skip_serializing_if = "Option::is_none")]
     pub customer_storage_account_arm_id: Option<String>,
     #[doc = "Gets the private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl MasterSiteProperties {
@@ -1089,19 +1212,54 @@ pub mod master_site_properties {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkConfiguration {
-    #[serde(rename = "ipv4Interfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv4Interfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv4_interfaces: Vec<Ipv4NetworkInterface>,
-    #[serde(rename = "ipv6Interfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv6Interfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv6_interfaces: Vec<Ipv6NetworkInterface>,
-    #[serde(rename = "defaultIpv4Gateways", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultIpv4Gateways",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_ipv4_gateways: Vec<String>,
-    #[serde(rename = "macAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "macAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mac_addresses: Vec<String>,
-    #[serde(rename = "dnsNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_names: Vec<String>,
-    #[serde(rename = "dnsQuestions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsQuestions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_questions: Vec<String>,
-    #[serde(rename = "dnsCanonicalNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsCanonicalNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_canonical_names: Vec<String>,
 }
 impl NetworkConfiguration {
@@ -1318,7 +1476,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionCollection {
     #[doc = "Gets the list of machines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Gets the value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1377,7 +1539,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceCollection {
     #[doc = "Gets the list of machines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Gets the value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1390,9 +1556,19 @@ impl PrivateLinkResourceCollection {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceProperties {
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
@@ -1611,7 +1787,12 @@ pub struct SiteHealthSummary {
     #[serde(rename = "affectedResourceType", default, skip_serializing_if = "Option::is_none")]
     pub affected_resource_type: Option<String>,
     #[doc = "Affected resources."]
-    #[serde(rename = "affectedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "affectedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub affected_resources: Vec<String>,
 }
 impl SiteHealthSummary {
@@ -1623,7 +1804,11 @@ impl SiteHealthSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SiteHealthSummaryCollection {
     #[doc = "List of SiteHealthSummary."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SiteHealthSummary>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1744,7 +1929,11 @@ impl VCenter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VCenterCollection {
     #[doc = "List of vCenter."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VCenter>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1789,7 +1978,11 @@ pub struct VCenterProperties {
     #[serde(rename = "instanceUuid", default, skip_serializing_if = "Option::is_none")]
     pub instance_uuid: Option<String>,
     #[doc = "Error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<HealthErrorDetails>,
 }
 impl VCenterProperties {
@@ -1801,7 +1994,11 @@ impl VCenterProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmWareSitesResultList {
     #[doc = "List of sites."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VMwareSite>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1935,7 +2132,11 @@ impl VMwareJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VMwareJobCollection {
     #[doc = "List of jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VMwareJob>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1977,7 +2178,11 @@ impl VMwareMachine {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VMwareMachineCollection {
     #[doc = "List of machines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VMwareMachine>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2025,7 +2230,11 @@ pub struct VMwareMachineProperties {
     #[serde(rename = "maxSnapshots", default, skip_serializing_if = "Option::is_none")]
     pub max_snapshots: Option<i32>,
     #[doc = "Disks attached to the machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<VMwareDisk>,
     #[doc = "AppsAndRoles in the guest virtual machine."]
     #[serde(rename = "appsAndRoles", default, skip_serializing_if = "Option::is_none")]
@@ -2043,7 +2252,12 @@ pub struct VMwareMachineProperties {
     #[serde(rename = "hostVersion", default, skip_serializing_if = "Option::is_none")]
     pub host_version: Option<String>,
     #[doc = "Network adapters attached to the machine."]
-    #[serde(rename = "networkAdapters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkAdapters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_adapters: Vec<VMwareNetworkAdapter>,
     #[doc = "If dependency mapping feature is enabled or not for the VM."]
     #[serde(rename = "dependencyMapping", default, skip_serializing_if = "Option::is_none")]
@@ -2103,7 +2317,11 @@ pub struct VMwareMachineProperties {
     #[serde(rename = "isDeleted", default, skip_serializing_if = "Option::is_none")]
     pub is_deleted: Option<bool>,
     #[doc = "Errors for machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<HealthErrorDetails>,
 }
 impl VMwareMachineProperties {
@@ -2124,7 +2342,12 @@ pub struct VMwareNetworkAdapter {
     #[serde(rename = "macAddress", default, skip_serializing_if = "Option::is_none")]
     pub mac_address: Option<String>,
     #[doc = "IP addresses for the machine."]
-    #[serde(rename = "ipAddressList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddressList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_address_list: Vec<String>,
     #[doc = "Network Name."]
     #[serde(rename = "networkName", default, skip_serializing_if = "Option::is_none")]
@@ -2163,7 +2386,11 @@ impl VMwareRunAsAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VMwareRunAsAccountCollection {
     #[doc = "List of run as accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VMwareRunAsAccount>,
     #[doc = "Value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/migrateprojects/src/package_2018_09/models.rs b/services/mgmt/migrateprojects/src/package_2018_09/models.rs
index c6b2b7d01e..c39a542336 100644
--- a/services/mgmt/migrateprojects/src/package_2018_09/models.rs
+++ b/services/mgmt/migrateprojects/src/package_2018_09/models.rs
@@ -5,7 +5,11 @@ use serde::{Deserialize, Serialize, Serializer};
 use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplyClause {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transformations: Vec<TransformationNode>,
 }
 impl ApplyClause {
@@ -50,7 +54,12 @@ pub struct AssessmentDetails {
     #[serde(rename = "machineName", default, skip_serializing_if = "Option::is_none")]
     pub machine_name: Option<String>,
     #[doc = "Gets or sets the list of IP addresses of the machine. IP addresses could be IP V4 or IP V6."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "Gets or sets the FQDN of the machine."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -59,7 +68,12 @@ pub struct AssessmentDetails {
     #[serde(rename = "biosId", default, skip_serializing_if = "Option::is_none")]
     pub bios_id: Option<String>,
     #[doc = "Gets or sets the list of MAC addresses of the machine."]
-    #[serde(rename = "macAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "macAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mac_addresses: Vec<String>,
     #[doc = "Gets or sets the ISV specific extended information."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -146,7 +160,11 @@ impl DatabaseAssessmentDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseCollection {
     #[doc = "Gets or sets the databases."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "Gets or sets the value of nextLink."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -182,7 +200,11 @@ impl DatabaseInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseInstanceCollection {
     #[doc = "Gets or sets the database instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseInstance>,
     #[doc = "Gets or sets the value of nextLink."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -239,7 +261,12 @@ impl DatabaseInstanceDiscoveryDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseInstanceProperties {
     #[doc = "Gets or sets the assessment details of the database instance published by various sources."]
-    #[serde(rename = "discoveryData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "discoveryData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub discovery_data: Vec<DatabaseInstanceDiscoveryDetails>,
     #[doc = "Gets or sets the database instances summary per solution. The key of dictionary is the solution name and value is the corresponding database instance summary object."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -300,7 +327,12 @@ impl DatabaseProjectSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseProperties {
     #[doc = "Gets or sets the assessment details of the database published by various sources."]
-    #[serde(rename = "assessmentData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assessmentData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assessment_data: Vec<DatabaseAssessmentDetails>,
     #[doc = "Gets or sets the time of the last modification of the database."]
     #[serde(rename = "lastUpdatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -385,7 +417,12 @@ pub struct DiscoveryDetails {
     #[serde(rename = "machineName", default, skip_serializing_if = "Option::is_none")]
     pub machine_name: Option<String>,
     #[doc = "Gets or sets the list of IP addresses of the machine. IP addresses could be IP V4 or IP V6."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "Gets or sets the FQDN of the machine."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -394,7 +431,12 @@ pub struct DiscoveryDetails {
     #[serde(rename = "biosId", default, skip_serializing_if = "Option::is_none")]
     pub bios_id: Option<String>,
     #[doc = "Gets or sets the list of MAC addresses of the machine."]
-    #[serde(rename = "macAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "macAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mac_addresses: Vec<String>,
     #[doc = "Gets or sets the ISV specific extended information."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -421,7 +463,11 @@ impl EdmReferentialConstraintPropertyPair {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventCollection {
     #[doc = "Gets or sets the machines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrateEvent>,
     #[doc = "Gets or sets the value of nextLink."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -478,7 +524,11 @@ impl IEdmDirectValueAnnotationsManager {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IEdmEntityContainer {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub elements: Vec<IEdmEntityContainerElement>,
     #[serde(rename = "schemaElementKind", default, skip_serializing_if = "Option::is_none")]
     pub schema_element_kind: Option<i_edm_entity_container::SchemaElementKind>,
@@ -573,13 +623,33 @@ pub mod i_edm_expression {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IEdmModel {
-    #[serde(rename = "schemaElements", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "schemaElements",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schema_elements: Vec<IEdmSchemaElement>,
-    #[serde(rename = "vocabularyAnnotations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vocabularyAnnotations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vocabulary_annotations: Vec<IEdmVocabularyAnnotation>,
-    #[serde(rename = "referencedModels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "referencedModels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub referenced_models: Vec<IEdmModel>,
-    #[serde(rename = "declaredNamespaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "declaredNamespaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub declared_namespaces: Vec<String>,
     #[serde(rename = "directValueAnnotationsManager", default, skip_serializing_if = "Option::is_none")]
     pub direct_value_annotations_manager: Option<IEdmDirectValueAnnotationsManager>,
@@ -645,7 +715,12 @@ impl IEdmNavigationPropertyBinding {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IEdmNavigationSource {
-    #[serde(rename = "navigationPropertyBindings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "navigationPropertyBindings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub navigation_property_bindings: Vec<IEdmNavigationPropertyBinding>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<IEdmPathExpression>,
@@ -661,7 +736,12 @@ impl IEdmNavigationSource {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IEdmPathExpression {
-    #[serde(rename = "pathSegments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pathSegments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path_segments: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
@@ -732,7 +812,12 @@ pub mod i_edm_property {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IEdmReferentialConstraint {
-    #[serde(rename = "propertyPairs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyPairs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_pairs: Vec<EdmReferentialConstraintPropertyPair>,
 }
 impl IEdmReferentialConstraint {
@@ -801,7 +886,12 @@ pub struct IEdmStructuredType {
     pub is_open: Option<bool>,
     #[serde(rename = "baseType", default, skip_serializing_if = "Option::is_none")]
     pub base_type: Box<Option<IEdmStructuredType>>,
-    #[serde(rename = "declaredProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "declaredProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub declared_properties: Vec<IEdmProperty>,
     #[serde(rename = "typeKind", default, skip_serializing_if = "Option::is_none")]
     pub type_kind: Option<i_edm_structured_type::TypeKind>,
@@ -952,7 +1042,11 @@ impl Machine {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MachineCollection {
     #[doc = "Gets or sets the machines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Machine>,
     #[doc = "Gets or sets the value of nextLink."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -981,13 +1075,28 @@ impl MachineMigrateEventProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MachineProperties {
     #[doc = "Gets or sets the discovery details of the machine published by various sources."]
-    #[serde(rename = "discoveryData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "discoveryData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub discovery_data: Vec<DiscoveryDetails>,
     #[doc = "Gets or sets the assessment details of the machine published by various sources."]
-    #[serde(rename = "assessmentData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assessmentData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assessment_data: Vec<AssessmentDetails>,
     #[doc = "Gets or sets the migration details of the machine published by various sources."]
-    #[serde(rename = "migrationData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "migrationData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub migration_data: Vec<MigrationDetails>,
     #[doc = "Gets or sets the time of the last modification of the machine."]
     #[serde(rename = "lastUpdatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -1097,7 +1206,12 @@ pub mod migrate_project {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrateProjectProperties {
     #[doc = "Gets or sets the list of tools registered with the migrate project."]
-    #[serde(rename = "registeredTools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "registeredTools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub registered_tools: Vec<String>,
     #[doc = "Gets the summary of the migrate project."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1210,7 +1324,12 @@ pub struct MigrationDetails {
     #[serde(rename = "machineName", default, skip_serializing_if = "Option::is_none")]
     pub machine_name: Option<String>,
     #[doc = "Gets or sets the list of IP addresses of the machine. IP addresses could be IP V4 or IP V6."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "Gets or sets the FQDN of the machine."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1219,7 +1338,12 @@ pub struct MigrationDetails {
     #[serde(rename = "biosId", default, skip_serializing_if = "Option::is_none")]
     pub bios_id: Option<String>,
     #[doc = "Gets or sets the list of MAC addresses of the machine."]
-    #[serde(rename = "macAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "macAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mac_addresses: Vec<String>,
     #[doc = "Gets or sets the ISV specific extended information."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -1236,11 +1360,19 @@ pub struct ODataPath {
     pub edm_type: Option<IEdmType>,
     #[serde(rename = "navigationSource", default, skip_serializing_if = "Option::is_none")]
     pub navigation_source: Option<IEdmNavigationSource>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub segments: Vec<ODataPathSegment>,
     #[serde(rename = "pathTemplate", default, skip_serializing_if = "Option::is_none")]
     pub path_template: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path: Vec<ODataPathSegment>,
 }
 impl ODataPath {
@@ -1359,7 +1491,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationResultList {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationResultList {
@@ -1498,7 +1634,12 @@ impl RegistrationResult {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SelectExpandClause {
-    #[serde(rename = "selectedItems", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "selectedItems",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selected_items: Vec<SelectItem>,
     #[serde(rename = "allSelected", default, skip_serializing_if = "Option::is_none")]
     pub all_selected: Option<bool>,
@@ -1774,7 +1915,11 @@ impl SolutionSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SolutionsCollection {
     #[doc = "Gets or sets the list of solutions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Solution>,
     #[doc = "Gets or sets the value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/mobilenetwork/src/package_2022_01_01_preview/models.rs b/services/mgmt/mobilenetwork/src/package_2022_01_01_preview/models.rs
index 8fea3f7bae..6087fba8b5 100644
--- a/services/mgmt/mobilenetwork/src/package_2022_01_01_preview/models.rs
+++ b/services/mgmt/mobilenetwork/src/package_2022_01_01_preview/models.rs
@@ -81,7 +81,11 @@ impl AttachedDataNetwork {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AttachedDataNetworkListResult {
     #[doc = "A list of data networks in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AttachedDataNetwork>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -111,10 +115,20 @@ pub struct AttachedDataNetworkPropertiesFormat {
     #[serde(rename = "naptConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub napt_configuration: Option<NaptConfiguration>,
     #[doc = "The user equipment address pool prefixes for the attached data network that are dynamically assigned by the core to UEs when they set up a PDU session.\nAt least one of userEquipmentAddressPoolPrefix and userEquipmentStaticAddressPoolPrefix must be defined. If both are defined then they must be the same size."]
-    #[serde(rename = "userEquipmentAddressPoolPrefix", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userEquipmentAddressPoolPrefix",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_equipment_address_pool_prefix: Vec<Ipv4AddrMask>,
     #[doc = "The user equipment address pool prefixes for the attached data network that are statically assigned by the core to UEs when they set up a PDU session.\nThe mapping of static IP to sim is configured in staticIpConfiguration on the sim resource.\nAt least one of userEquipmentAddressPoolPrefix and userEquipmentStaticAddressPoolPrefix must be defined. If both are defined then they must be the same size."]
-    #[serde(rename = "userEquipmentStaticAddressPoolPrefix", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userEquipmentStaticAddressPoolPrefix",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_equipment_static_address_pool_prefix: Vec<Ipv4AddrMask>,
 }
 impl AttachedDataNetworkPropertiesFormat {
@@ -313,7 +327,12 @@ pub struct DataNetworkConfiguration {
     #[serde(rename = "defaultSessionType", default, skip_serializing_if = "Option::is_none")]
     pub default_session_type: Option<PduSessionType>,
     #[doc = "Allowed session types in addition to the default session type.  Must not duplicate the default session type."]
-    #[serde(rename = "additionalAllowedSessionTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalAllowedSessionTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_allowed_session_types: Vec<PduSessionType>,
     #[doc = "List of Services that can be used as part of this Sim Policy. The list must not contain duplicate items and must contain at least one item."]
     #[serde(rename = "allowedServices")]
@@ -338,7 +357,11 @@ impl DataNetworkConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataNetworkListResult {
     #[doc = "A list of data networks in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataNetwork>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -409,10 +432,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -481,7 +513,11 @@ impl MobileNetwork {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MobileNetworkListResult {
     #[doc = "A list of mobile networks in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MobileNetwork>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -643,7 +679,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of Microsoft.MobileNetwork operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -684,7 +724,11 @@ impl PacketCoreControlPlane {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PacketCoreControlPlaneListResult {
     #[doc = "A list of packet core control planes in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PacketCoreControlPlane>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -759,7 +803,11 @@ impl PacketCoreDataPlane {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PacketCoreDataPlaneListResult {
     #[doc = "A list of packet core data planes in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PacketCoreDataPlane>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1233,7 +1281,11 @@ pub struct ServiceDataFlowTemplate {
     #[serde(rename = "remoteIpList")]
     pub remote_ip_list: Vec<String>,
     #[doc = "The port(s) to which UEs will connect for this flow. You can specify zero or more ports or port ranges. If you specify one or more ports or port ranges then you must specify a value other than `ip` in the `protocol` field. This is an optional setting. If you do not specify it then connections will be allowed on all ports. Port ranges must be specified as <FirstPort>-<LastPort>. For example: [`8080`, `8082-8085`]."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<String>,
 }
 impl ServiceDataFlowTemplate {
@@ -1251,7 +1303,11 @@ impl ServiceDataFlowTemplate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceListResult {
     #[doc = "A list of Services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Service>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1329,7 +1385,11 @@ impl Sim {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SimIdListResult {
     #[doc = "A list of sim profile ids in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubResource>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1344,7 +1404,11 @@ impl SimIdListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SimListResult {
     #[doc = "A list of Sims in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Sim>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1385,7 +1449,11 @@ impl SimPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SimPolicyListResult {
     #[doc = "A list of SimPolicies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SimPolicy>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1478,7 +1546,12 @@ pub struct SimPropertiesFormat {
     #[serde(rename = "simPolicy", default, skip_serializing_if = "Option::is_none")]
     pub sim_policy: Option<SimPolicyResourceId>,
     #[doc = "A list of static IP addresses assigned to this sim. Each address is assigned at a defined network scope, made up of {attached data network, slice}."]
-    #[serde(rename = "staticIpConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "staticIpConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub static_ip_configuration: Vec<SimStaticIpProperties>,
 }
 impl SimPropertiesFormat {
@@ -1555,7 +1628,11 @@ impl Site {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SiteListResult {
     #[doc = "A list of sites in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Site>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1579,7 +1656,12 @@ pub struct SitePropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "An array of ids of the network functions deployed on the site, maintained by the user."]
-    #[serde(rename = "networkFunctions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkFunctions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_functions: Vec<SubResource>,
 }
 impl SitePropertiesFormat {
@@ -1636,7 +1718,11 @@ impl SliceConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SliceListResult {
     #[doc = "A list of data networks in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Slice>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/mobilenetwork/src/package_2022_03_01_preview/models.rs b/services/mgmt/mobilenetwork/src/package_2022_03_01_preview/models.rs
index e8cedc2b96..f510cb4200 100644
--- a/services/mgmt/mobilenetwork/src/package_2022_03_01_preview/models.rs
+++ b/services/mgmt/mobilenetwork/src/package_2022_03_01_preview/models.rs
@@ -81,7 +81,11 @@ impl AttachedDataNetwork {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AttachedDataNetworkListResult {
     #[doc = "A list of data networks in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AttachedDataNetwork>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -111,10 +115,20 @@ pub struct AttachedDataNetworkPropertiesFormat {
     #[serde(rename = "naptConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub napt_configuration: Option<NaptConfiguration>,
     #[doc = "The user equipment address pool prefixes for the attached data network that are dynamically assigned by the core to UEs when they set up a PDU session.\nAt least one of userEquipmentAddressPoolPrefix and userEquipmentStaticAddressPoolPrefix must be defined. If both are defined then they must be the same size."]
-    #[serde(rename = "userEquipmentAddressPoolPrefix", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userEquipmentAddressPoolPrefix",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_equipment_address_pool_prefix: Vec<Ipv4AddrMask>,
     #[doc = "The user equipment address pool prefixes for the attached data network that are statically assigned by the core to UEs when they set up a PDU session.\nThe mapping of static IP to sim is configured in staticIpConfiguration on the sim resource.\nAt least one of userEquipmentAddressPoolPrefix and userEquipmentStaticAddressPoolPrefix must be defined. If both are defined then they must be the same size."]
-    #[serde(rename = "userEquipmentStaticAddressPoolPrefix", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userEquipmentStaticAddressPoolPrefix",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_equipment_static_address_pool_prefix: Vec<Ipv4AddrMask>,
 }
 impl AttachedDataNetworkPropertiesFormat {
@@ -276,7 +290,12 @@ pub struct DataNetworkConfiguration {
     #[serde(rename = "defaultSessionType", default, skip_serializing_if = "Option::is_none")]
     pub default_session_type: Option<PduSessionType>,
     #[doc = "Allowed session types in addition to the default session type.  Must not duplicate the default session type."]
-    #[serde(rename = "additionalAllowedSessionTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalAllowedSessionTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_allowed_session_types: Vec<PduSessionType>,
     #[doc = "List of Services that can be used as part of this Sim Policy. The list must not contain duplicate items and must contain at least one item."]
     #[serde(rename = "allowedServices")]
@@ -301,7 +320,11 @@ impl DataNetworkConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataNetworkListResult {
     #[doc = "A list of data networks in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataNetwork>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -372,10 +395,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -458,7 +490,11 @@ impl MobileNetwork {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MobileNetworkListResult {
     #[doc = "A list of mobile networks in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MobileNetwork>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -620,7 +656,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of Microsoft.MobileNetwork operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -661,7 +701,11 @@ impl PacketCoreControlPlane {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PacketCoreControlPlaneListResult {
     #[doc = "A list of packet core control planes in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PacketCoreControlPlane>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -736,7 +780,11 @@ impl PacketCoreDataPlane {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PacketCoreDataPlaneListResult {
     #[doc = "A list of packet core data planes in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PacketCoreDataPlane>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1213,7 +1261,11 @@ pub struct ServiceDataFlowTemplate {
     #[serde(rename = "remoteIpList")]
     pub remote_ip_list: Vec<String>,
     #[doc = "The port(s) to which UEs will connect for this flow. You can specify zero or more ports or port ranges. If you specify one or more ports or port ranges then you must specify a value other than `ip` in the `protocol` field. This is an optional setting. If you do not specify it then connections will be allowed on all ports. Port ranges must be specified as <FirstPort>-<LastPort>. For example: [`8080`, `8082-8085`]."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<String>,
 }
 impl ServiceDataFlowTemplate {
@@ -1231,7 +1283,11 @@ impl ServiceDataFlowTemplate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceListResult {
     #[doc = "A list of Services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Service>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1309,7 +1365,11 @@ impl Sim {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SimIdListResult {
     #[doc = "A list of sim profile ids in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubResource>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1324,7 +1384,11 @@ impl SimIdListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SimListResult {
     #[doc = "A list of Sims in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Sim>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1365,7 +1429,11 @@ impl SimPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SimPolicyListResult {
     #[doc = "A list of SimPolicies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SimPolicy>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1458,7 +1526,12 @@ pub struct SimPropertiesFormat {
     #[serde(rename = "simPolicy", default, skip_serializing_if = "Option::is_none")]
     pub sim_policy: Option<SimPolicyResourceId>,
     #[doc = "A list of static IP addresses assigned to this sim. Each address is assigned at a defined network scope, made up of {attached data network, slice}."]
-    #[serde(rename = "staticIpConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "staticIpConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub static_ip_configuration: Vec<SimStaticIpProperties>,
 }
 impl SimPropertiesFormat {
@@ -1574,7 +1647,11 @@ impl Site {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SiteListResult {
     #[doc = "A list of sites in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Site>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1598,7 +1675,12 @@ pub struct SitePropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "An array of ids of the network functions deployed on the site, maintained by the user."]
-    #[serde(rename = "networkFunctions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkFunctions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_functions: Vec<SubResource>,
 }
 impl SitePropertiesFormat {
@@ -1655,7 +1737,11 @@ impl SliceConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SliceListResult {
     #[doc = "A list of data networks in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Slice>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/mobilenetwork/src/package_2022_04_01_preview/models.rs b/services/mgmt/mobilenetwork/src/package_2022_04_01_preview/models.rs
index 11292fad49..683361ba3f 100644
--- a/services/mgmt/mobilenetwork/src/package_2022_04_01_preview/models.rs
+++ b/services/mgmt/mobilenetwork/src/package_2022_04_01_preview/models.rs
@@ -81,7 +81,11 @@ impl AttachedDataNetwork {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AttachedDataNetworkListResult {
     #[doc = "A list of data networks in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AttachedDataNetwork>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -108,16 +112,31 @@ pub struct AttachedDataNetworkPropertiesFormat {
     #[serde(rename = "userPlaneDataInterface")]
     pub user_plane_data_interface: InterfaceProperties,
     #[doc = "The DNS servers to signal to UEs to use for this attached data network."]
-    #[serde(rename = "dnsAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_addresses: Vec<Ipv4Addr>,
     #[doc = "The network address and port translation settings to use for the attached data network."]
     #[serde(rename = "naptConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub napt_configuration: Option<NaptConfiguration>,
     #[doc = "The user equipment (UE) address pool prefixes for the attached data network from which the packet core instance will dynamically assign IP addresses to UEs.\nThe packet core instance assigns an IP address to a UE when the UE sets up a PDU session.\n You must define at least one of userEquipmentAddressPoolPrefix and userEquipmentStaticAddressPoolPrefix. If you define both, they must be of the same size."]
-    #[serde(rename = "userEquipmentAddressPoolPrefix", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userEquipmentAddressPoolPrefix",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_equipment_address_pool_prefix: Vec<Ipv4AddrMask>,
     #[doc = "The user equipment (UE) address pool prefixes for the attached data network from which the packet core instance will assign static IP addresses to UEs.\nThe packet core instance assigns an IP address to a UE when the UE sets up a PDU session. The static IP address for a specific UE is set in StaticIPConfiguration on the corresponding SIM resource.\nAt least one of userEquipmentAddressPoolPrefix and userEquipmentStaticAddressPoolPrefix must be defined. If both are defined, they must be of the same size."]
-    #[serde(rename = "userEquipmentStaticAddressPoolPrefix", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userEquipmentStaticAddressPoolPrefix",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_equipment_static_address_pool_prefix: Vec<Ipv4AddrMask>,
 }
 impl AttachedDataNetworkPropertiesFormat {
@@ -352,7 +371,12 @@ pub struct DataNetworkConfiguration {
     #[serde(rename = "defaultSessionType", default, skip_serializing_if = "Option::is_none")]
     pub default_session_type: Option<PduSessionType>,
     #[doc = "Allowed session types in addition to the default session type. Must not duplicate the default session type."]
-    #[serde(rename = "additionalAllowedSessionTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalAllowedSessionTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_allowed_session_types: Vec<PduSessionType>,
     #[doc = "List of services that can be used as part of this SIM policy. The list must not contain duplicate items and must contain at least one item."]
     #[serde(rename = "allowedServices")]
@@ -377,7 +401,11 @@ impl DataNetworkConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataNetworkListResult {
     #[doc = "A list of data networks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataNetwork>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -448,10 +476,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -636,7 +673,11 @@ impl MobileNetwork {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MobileNetworkListResult {
     #[doc = "A list of mobile networks in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MobileNetwork>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -798,7 +839,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of Microsoft.MobileNetwork operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -843,7 +888,11 @@ impl PacketCoreControlPlane {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PacketCoreControlPlaneListResult {
     #[doc = "A list of packet core control planes in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PacketCoreControlPlane>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -925,7 +974,11 @@ impl PacketCoreControlPlaneVersion {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PacketCoreControlPlaneVersionListResult {
     #[doc = "A list of supported packet core control plane versions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PacketCoreControlPlaneVersion>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1069,7 +1122,11 @@ impl PacketCoreDataPlane {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PacketCoreDataPlaneListResult {
     #[doc = "A list of packet core data planes in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PacketCoreDataPlane>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1622,7 +1679,11 @@ pub struct ServiceDataFlowTemplate {
     #[serde(rename = "remoteIpList")]
     pub remote_ip_list: Vec<String>,
     #[doc = "The port(s) to which UEs will connect for this flow. You can specify zero or more ports or port ranges. If you specify one or more ports or port ranges then you must specify a value other than `ip` in the `protocol` field. This is an optional setting. If you do not specify it then connections will be allowed on all ports. Port ranges must be specified as <FirstPort>-<LastPort>. For example: [`8080`, `8082-8085`]."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<String>,
 }
 impl ServiceDataFlowTemplate {
@@ -1640,7 +1701,11 @@ impl ServiceDataFlowTemplate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceListResult {
     #[doc = "A list of services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Service>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1742,7 +1807,11 @@ impl SimGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SimGroupListResult {
     #[doc = "A list of SIM groups in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SimGroup>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1792,7 +1861,11 @@ impl SimGroupResourceId {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SimIdListResult {
     #[doc = "A list of SIM IDs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubResource>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1807,7 +1880,11 @@ impl SimIdListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SimListResult {
     #[doc = "A list of SIMs in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Sim>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1848,7 +1925,11 @@ impl SimPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SimPolicyListResult {
     #[doc = "A list of SIM policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SimPolicy>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1938,7 +2019,12 @@ pub struct SimPropertiesFormat {
     #[serde(rename = "simPolicy", default, skip_serializing_if = "Option::is_none")]
     pub sim_policy: Option<SimPolicyResourceId>,
     #[doc = "A list of static IP addresses assigned to this SIM. Each address is assigned at a defined network scope, made up of {attached data network, slice}."]
-    #[serde(rename = "staticIpConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "staticIpConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub static_ip_configuration: Vec<SimStaticIpProperties>,
 }
 impl SimPropertiesFormat {
@@ -2053,7 +2139,11 @@ impl Site {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SiteListResult {
     #[doc = "A list of sites in a mobile network."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Site>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2077,7 +2167,12 @@ pub struct SitePropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "An array of IDs of the network functions deployed on the site, maintained by the user."]
-    #[serde(rename = "networkFunctions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkFunctions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_functions: Vec<SubResource>,
 }
 impl SitePropertiesFormat {
@@ -2134,7 +2229,11 @@ impl SliceConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SliceListResult {
     #[doc = "A list of network slices in a mobile network."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Slice>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/monitor/src/package_2019_11/models.rs b/services/mgmt/monitor/src/package_2019_11/models.rs
index da69133013..0bec701906 100644
--- a/services/mgmt/monitor/src/package_2019_11/models.rs
+++ b/services/mgmt/monitor/src/package_2019_11/models.rs
@@ -24,34 +24,84 @@ pub struct ActionGroup {
     #[doc = "Indicates whether this action group is enabled. If an action group is not enabled, then none of its receivers will receive communications."]
     pub enabled: bool,
     #[doc = "The list of email receivers that are part of this action group."]
-    #[serde(rename = "emailReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_receivers: Vec<EmailReceiver>,
     #[doc = "The list of SMS receivers that are part of this action group."]
-    #[serde(rename = "smsReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "smsReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sms_receivers: Vec<SmsReceiver>,
     #[doc = "The list of webhook receivers that are part of this action group."]
-    #[serde(rename = "webhookReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "webhookReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub webhook_receivers: Vec<WebhookReceiver>,
     #[doc = "The list of ITSM receivers that are part of this action group."]
-    #[serde(rename = "itsmReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "itsmReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub itsm_receivers: Vec<ItsmReceiver>,
     #[doc = "The list of AzureAppPush receivers that are part of this action group."]
-    #[serde(rename = "azureAppPushReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureAppPushReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_app_push_receivers: Vec<AzureAppPushReceiver>,
     #[doc = "The list of AutomationRunbook receivers that are part of this action group."]
-    #[serde(rename = "automationRunbookReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "automationRunbookReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub automation_runbook_receivers: Vec<AutomationRunbookReceiver>,
     #[doc = "The list of voice receivers that are part of this action group."]
-    #[serde(rename = "voiceReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "voiceReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub voice_receivers: Vec<VoiceReceiver>,
     #[doc = "The list of logic app receivers that are part of this action group."]
-    #[serde(rename = "logicAppReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logicAppReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logic_app_receivers: Vec<LogicAppReceiver>,
     #[doc = "The list of azure function receivers that are part of this action group."]
-    #[serde(rename = "azureFunctionReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureFunctionReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_function_receivers: Vec<AzureFunctionReceiver>,
     #[doc = "The list of ARM role receivers that are part of this action group. Roles are Azure RBAC roles and only built-in roles are supported."]
-    #[serde(rename = "armRoleReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "armRoleReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arm_role_receivers: Vec<ArmRoleReceiver>,
 }
 impl ActionGroup {
@@ -76,7 +126,11 @@ impl ActionGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActionGroupList {
     #[doc = "The list of action groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ActionGroupResource>,
     #[doc = "Provides the link to retrieve the next set of elements."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -186,7 +240,12 @@ impl ActivityLogAlertActionGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActivityLogAlertActionList {
     #[doc = "The list of activity log alerts."]
-    #[serde(rename = "actionGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub action_groups: Vec<ActivityLogAlertActionGroup>,
 }
 impl ActivityLogAlertActionList {
@@ -223,7 +282,11 @@ impl ActivityLogAlertLeafCondition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActivityLogAlertList {
     #[doc = "The list of activity log alerts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ActivityLogAlertResource>,
     #[doc = "Provides the link to retrieve the next set of elements."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -314,7 +377,11 @@ pub struct AlertRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<RuleAction>,
     #[doc = "the array of actions that are performed when the alert rule becomes active, and when an alert condition is resolved."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<RuleAction>,
     #[doc = "Last time the rule was updated in ISO8601 format."]
     #[serde(rename = "lastUpdatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -351,7 +418,11 @@ impl AlertRuleResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertRuleResourceCollection {
     #[doc = "the values for the alert rule resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AlertRuleResource>,
 }
 impl azure_core::Continuable for AlertRuleResourceCollection {
@@ -523,7 +594,11 @@ pub struct AutoscaleNotification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub email: Option<EmailNotification>,
     #[doc = "the collection of webhook notifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub webhooks: Vec<WebhookNotification>,
 }
 impl AutoscaleNotification {
@@ -576,7 +651,11 @@ pub struct AutoscaleSetting {
     #[doc = "the collection of automatic scaling profiles that specify different scaling parameters for different time periods. A maximum of 20 profiles can be specified."]
     pub profiles: Vec<AutoscaleProfile>,
     #[doc = "the collection of notifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notifications: Vec<AutoscaleNotification>,
     #[doc = "the enabled flag. Specifies whether automatic scaling is enabled for the resource. The default value is 'false'."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -655,7 +734,12 @@ impl AutoscaleSettingResourcePatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzNsActionGroup {
     #[doc = "Azure Action Group reference."]
-    #[serde(rename = "actionGroup", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionGroup",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub action_group: Vec<String>,
     #[doc = "Custom subject override for all email ids in Azure action group"]
     #[serde(rename = "emailSubject", default, skip_serializing_if = "Option::is_none")]
@@ -755,7 +839,12 @@ pub struct AzureMonitorPrivateLinkScopeProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "List of private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl AzureMonitorPrivateLinkScopeProperties {
@@ -868,7 +957,11 @@ pub struct Criteria {
     #[serde(rename = "metricName")]
     pub metric_name: String,
     #[doc = "List of Dimensions for creating metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
 }
 impl Criteria {
@@ -906,10 +999,18 @@ pub struct DiagnosticSettings {
     #[serde(rename = "eventHubName", default, skip_serializing_if = "Option::is_none")]
     pub event_hub_name: Option<String>,
     #[doc = "The list of metric settings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<MetricSettings>,
     #[doc = "The list of logs settings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logs: Vec<LogSettings>,
     #[doc = "The full ARM resource ID of the Log Analytics workspace to which you would like to send Diagnostic Logs. Example: /subscriptions/4b9e8510-67ab-4e9a-95a9-e2f1e570ea9c/resourceGroups/insights-integration/providers/Microsoft.OperationalInsights/workspaces/viruela2"]
     #[serde(rename = "workspaceId", default, skip_serializing_if = "Option::is_none")]
@@ -962,7 +1063,11 @@ impl DiagnosticSettingsCategoryResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticSettingsCategoryResourceCollection {
     #[doc = "The collection of diagnostic settings category resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiagnosticSettingsCategoryResource>,
 }
 impl DiagnosticSettingsCategoryResourceCollection {
@@ -988,7 +1093,11 @@ impl DiagnosticSettingsResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticSettingsResourceCollection {
     #[doc = "The collection of diagnostic settings resources;."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiagnosticSettingsResource>,
 }
 impl DiagnosticSettingsResourceCollection {
@@ -1191,7 +1300,12 @@ pub struct EmailNotification {
     #[serde(rename = "sendToSubscriptionCoAdministrators", default, skip_serializing_if = "Option::is_none")]
     pub send_to_subscription_co_administrators: Option<bool>,
     #[doc = "the custom e-mails list. This value can be null or empty, in which case this attribute will be ignored."]
-    #[serde(rename = "customEmails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customEmails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_emails: Vec<String>,
 }
 impl EmailNotification {
@@ -1310,10 +1424,19 @@ pub struct ErrorResponseCommon {
     #[serde(flatten)]
     pub error_response: ErrorResponse,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseCommon>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponseCommon {
@@ -1500,7 +1623,11 @@ impl Incident {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IncidentListResult {
     #[doc = "the incident collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Incident>,
 }
 impl azure_core::Continuable for IncidentListResult {
@@ -1880,7 +2007,11 @@ impl LogSearchRuleResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogSearchRuleResourceCollection {
     #[doc = "The values for the Log Search Rule resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogSearchRuleResource>,
 }
 impl azure_core::Continuable for LogSearchRuleResourceCollection {
@@ -2140,7 +2271,12 @@ pub struct MetricAlertMultipleResourceMultipleMetricCriteria {
     #[serde(flatten)]
     pub metric_alert_criteria: MetricAlertCriteria,
     #[doc = "the list of multiple metric criteria for this 'all of' operation. "]
-    #[serde(rename = "allOf", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allOf",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub all_of: Vec<MultiMetricCriteria>,
 }
 impl MetricAlertMultipleResourceMultipleMetricCriteria {
@@ -2181,7 +2317,11 @@ pub struct MetricAlertProperties {
     #[serde(rename = "autoMitigate", default, skip_serializing_if = "Option::is_none")]
     pub auto_mitigate: Option<bool>,
     #[doc = "the array of actions that are performed when the alert rule becomes active, and when an alert condition is resolved."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<MetricAlertAction>,
     #[doc = "Last time the rule was updated in ISO8601 format."]
     #[serde(rename = "lastUpdatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -2229,7 +2369,11 @@ pub struct MetricAlertPropertiesPatch {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "the list of resource id's that this metric alert is scoped to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
     #[doc = "how often the metric alert is evaluated represented in ISO 8601 duration format."]
     #[serde(rename = "evaluationFrequency", default, skip_serializing_if = "Option::is_none")]
@@ -2250,7 +2394,11 @@ pub struct MetricAlertPropertiesPatch {
     #[serde(rename = "autoMitigate", default, skip_serializing_if = "Option::is_none")]
     pub auto_mitigate: Option<bool>,
     #[doc = "the array of actions that are performed when the alert rule becomes active, and when an alert condition is resolved."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<MetricAlertAction>,
     #[doc = "Last time the rule was updated in ISO8601 format."]
     #[serde(rename = "lastUpdatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -2281,7 +2429,11 @@ impl MetricAlertResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricAlertResourceCollection {
     #[doc = "the values for the alert rule resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetricAlertResource>,
 }
 impl azure_core::Continuable for MetricAlertResourceCollection {
@@ -2316,7 +2468,12 @@ pub struct MetricAlertSingleResourceMultipleMetricCriteria {
     #[serde(flatten)]
     pub metric_alert_criteria: MetricAlertCriteria,
     #[doc = "The list of metric criteria for this 'all of' operation. "]
-    #[serde(rename = "allOf", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allOf",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub all_of: Vec<MetricCriteria>,
 }
 impl MetricAlertSingleResourceMultipleMetricCriteria {
@@ -2352,7 +2509,11 @@ impl MetricAlertStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricAlertStatusCollection {
     #[doc = "the values for the alert rule resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetricAlertStatus>,
 }
 impl MetricAlertStatusCollection {
@@ -2420,7 +2581,11 @@ impl MetricBaselinesProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricBaselinesResponse {
     #[doc = "The list of metric baselines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SingleMetricBaseline>,
 }
 impl azure_core::Continuable for MetricBaselinesResponse {
@@ -2573,16 +2738,30 @@ pub struct MetricDefinition {
     #[serde(rename = "primaryAggregationType", default, skip_serializing_if = "Option::is_none")]
     pub primary_aggregation_type: Option<AggregationType>,
     #[doc = "the collection of what aggregation types are supported."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<AggregationType>,
     #[doc = "the collection of what aggregation intervals are available to be queried."]
-    #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricAvailabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_availabilities: Vec<MetricAvailability>,
     #[doc = "the resource identifier of the metric definition."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "the name and the display name of the dimension, i.e. it is a localizable string."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<LocalizableString>,
 }
 impl MetricDefinition {
@@ -2744,7 +2923,11 @@ pub struct MetricTrigger {
     #[doc = "the threshold of the metric that triggers the scale action."]
     pub threshold: f64,
     #[doc = "List of dimension conditions. For example: [{\"DimensionName\":\"AppName\",\"Operator\":\"Equals\",\"Values\":[\"App1\"]},{\"DimensionName\":\"Deployment\",\"Operator\":\"Equals\",\"Values\":[\"default\"]}]."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<ScaleRuleMetricDimension>,
     #[doc = "a value indicating whether metric should divide per instance."]
     #[serde(rename = "dividePerInstance", default, skip_serializing_if = "Option::is_none")]
@@ -2903,7 +3086,11 @@ pub struct MultiMetricCriteria {
     #[serde(rename = "timeAggregation")]
     pub time_aggregation: multi_metric_criteria::TimeAggregation,
     #[doc = "List of dimension conditions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Allows creating an alert rule on a custom metric that isn't yet emitted, by causing the metric validation to be skipped."]
     #[serde(rename = "skipMetricValidation", default, skip_serializing_if = "Option::is_none")]
@@ -3089,7 +3276,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Insights provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3145,7 +3336,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3210,7 +3405,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3234,7 +3433,12 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -3574,7 +3778,12 @@ pub struct RuleEmailAction {
     #[serde(rename = "sendToServiceOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_to_service_owners: Option<bool>,
     #[doc = "the list of administrator's custom email addresses to notify of the activation of the alert."]
-    #[serde(rename = "customEmails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customEmails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_emails: Vec<String>,
 }
 impl RuleEmailAction {
@@ -3858,7 +4067,11 @@ impl ScopedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScopedResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScopedResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4026,7 +4239,12 @@ pub struct Source {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub query: Option<String>,
     #[doc = "List of  Resource referred into query"]
-    #[serde(rename = "authorizedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorized_resources: Vec<String>,
     #[doc = "The resource uri over which log search query is to be run."]
     #[serde(rename = "dataSourceId")]
@@ -4061,7 +4279,11 @@ pub struct SubscriptionDiagnosticSettings {
     #[serde(rename = "eventHubName", default, skip_serializing_if = "Option::is_none")]
     pub event_hub_name: Option<String>,
     #[doc = "The list of logs settings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logs: Vec<SubscriptionLogSettings>,
     #[doc = "The full ARM resource ID of the Log Analytics workspace to which you would like to send Diagnostic Logs. Example: /subscriptions/4b9e8510-67ab-4e9a-95a9-e2f1e570ea9c/resourceGroups/insights-integration/providers/Microsoft.OperationalInsights/workspaces/viruela2"]
     #[serde(rename = "workspaceId", default, skip_serializing_if = "Option::is_none")]
@@ -4090,7 +4312,11 @@ impl SubscriptionDiagnosticSettingsResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionDiagnosticSettingsResourceCollection {
     #[doc = "The collection of subscription diagnostic settings resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionDiagnosticSettingsResource>,
 }
 impl SubscriptionDiagnosticSettingsResourceCollection {
@@ -4187,14 +4413,23 @@ pub struct TimeSeriesBaseline {
     #[doc = "The aggregation type of the metric."]
     pub aggregation: String,
     #[doc = "The dimensions of this time series."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricSingleDimension>,
     #[doc = "The list of timestamps of the baselines."]
     pub timestamps: Vec<time::OffsetDateTime>,
     #[doc = "The baseline values for each sensitivity."]
     pub data: Vec<SingleBaseline>,
     #[doc = "The baseline metadata values."]
-    #[serde(rename = "metadataValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metadataValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata_values: Vec<BaselineMetadata>,
 }
 impl TimeSeriesBaseline {
@@ -4212,10 +4447,18 @@ impl TimeSeriesBaseline {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TimeSeriesElement {
     #[doc = "the metadata values returned if $filter was specified in the call."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadatavalues: Vec<MetadataValue>,
     #[doc = "An array of data points representing the metric values.  This is only returned if a result type of data is specified."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<MetricValue>,
 }
 impl TimeSeriesElement {
@@ -4354,7 +4597,11 @@ pub mod vm_insights_onboarding_status {
         #[serde(rename = "dataStatus")]
         pub data_status: properties::DataStatus,
         #[doc = "Containers that currently store VM Insights data for the specified resource."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub data: Vec<DataContainer>,
     }
     impl Properties {
diff --git a/services/mgmt/monitor/src/package_2020_03/models.rs b/services/mgmt/monitor/src/package_2020_03/models.rs
index b709b2f951..6242814fc7 100644
--- a/services/mgmt/monitor/src/package_2020_03/models.rs
+++ b/services/mgmt/monitor/src/package_2020_03/models.rs
@@ -24,34 +24,84 @@ pub struct ActionGroup {
     #[doc = "Indicates whether this action group is enabled. If an action group is not enabled, then none of its receivers will receive communications."]
     pub enabled: bool,
     #[doc = "The list of email receivers that are part of this action group."]
-    #[serde(rename = "emailReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_receivers: Vec<EmailReceiver>,
     #[doc = "The list of SMS receivers that are part of this action group."]
-    #[serde(rename = "smsReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "smsReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sms_receivers: Vec<SmsReceiver>,
     #[doc = "The list of webhook receivers that are part of this action group."]
-    #[serde(rename = "webhookReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "webhookReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub webhook_receivers: Vec<WebhookReceiver>,
     #[doc = "The list of ITSM receivers that are part of this action group."]
-    #[serde(rename = "itsmReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "itsmReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub itsm_receivers: Vec<ItsmReceiver>,
     #[doc = "The list of AzureAppPush receivers that are part of this action group."]
-    #[serde(rename = "azureAppPushReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureAppPushReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_app_push_receivers: Vec<AzureAppPushReceiver>,
     #[doc = "The list of AutomationRunbook receivers that are part of this action group."]
-    #[serde(rename = "automationRunbookReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "automationRunbookReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub automation_runbook_receivers: Vec<AutomationRunbookReceiver>,
     #[doc = "The list of voice receivers that are part of this action group."]
-    #[serde(rename = "voiceReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "voiceReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub voice_receivers: Vec<VoiceReceiver>,
     #[doc = "The list of logic app receivers that are part of this action group."]
-    #[serde(rename = "logicAppReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logicAppReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logic_app_receivers: Vec<LogicAppReceiver>,
     #[doc = "The list of azure function receivers that are part of this action group."]
-    #[serde(rename = "azureFunctionReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureFunctionReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_function_receivers: Vec<AzureFunctionReceiver>,
     #[doc = "The list of ARM role receivers that are part of this action group. Roles are Azure RBAC roles and only built-in roles are supported."]
-    #[serde(rename = "armRoleReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "armRoleReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arm_role_receivers: Vec<ArmRoleReceiver>,
 }
 impl ActionGroup {
@@ -76,7 +126,11 @@ impl ActionGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActionGroupList {
     #[doc = "The list of action groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ActionGroupResource>,
     #[doc = "Provides the link to retrieve the next set of elements."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -186,7 +240,12 @@ impl ActivityLogAlertActionGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActivityLogAlertActionList {
     #[doc = "The list of activity log alerts."]
-    #[serde(rename = "actionGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub action_groups: Vec<ActivityLogAlertActionGroup>,
 }
 impl ActivityLogAlertActionList {
@@ -223,7 +282,11 @@ impl ActivityLogAlertLeafCondition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActivityLogAlertList {
     #[doc = "The list of activity log alerts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ActivityLogAlertResource>,
     #[doc = "Provides the link to retrieve the next set of elements."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -314,7 +377,11 @@ pub struct AlertRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<RuleAction>,
     #[doc = "the array of actions that are performed when the alert rule becomes active, and when an alert condition is resolved."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<RuleAction>,
     #[doc = "Last time the rule was updated in ISO8601 format."]
     #[serde(rename = "lastUpdatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -351,7 +418,11 @@ impl AlertRuleResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertRuleResourceCollection {
     #[doc = "the values for the alert rule resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AlertRuleResource>,
 }
 impl azure_core::Continuable for AlertRuleResourceCollection {
@@ -523,7 +594,11 @@ pub struct AutoscaleNotification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub email: Option<EmailNotification>,
     #[doc = "the collection of webhook notifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub webhooks: Vec<WebhookNotification>,
 }
 impl AutoscaleNotification {
@@ -576,7 +651,11 @@ pub struct AutoscaleSetting {
     #[doc = "the collection of automatic scaling profiles that specify different scaling parameters for different time periods. A maximum of 20 profiles can be specified."]
     pub profiles: Vec<AutoscaleProfile>,
     #[doc = "the collection of notifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notifications: Vec<AutoscaleNotification>,
     #[doc = "the enabled flag. Specifies whether automatic scaling is enabled for the resource. The default value is 'false'."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -655,7 +734,12 @@ impl AutoscaleSettingResourcePatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzNsActionGroup {
     #[doc = "Azure Action Group reference."]
-    #[serde(rename = "actionGroup", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionGroup",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub action_group: Vec<String>,
     #[doc = "Custom subject override for all email ids in Azure action group"]
     #[serde(rename = "emailSubject", default, skip_serializing_if = "Option::is_none")]
@@ -755,7 +839,12 @@ pub struct AzureMonitorPrivateLinkScopeProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "List of private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl AzureMonitorPrivateLinkScopeProperties {
@@ -868,7 +957,11 @@ pub struct Criteria {
     #[serde(rename = "metricName")]
     pub metric_name: String,
     #[doc = "List of Dimensions for creating metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
 }
 impl Criteria {
@@ -906,10 +999,18 @@ pub struct DiagnosticSettings {
     #[serde(rename = "eventHubName", default, skip_serializing_if = "Option::is_none")]
     pub event_hub_name: Option<String>,
     #[doc = "The list of metric settings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<MetricSettings>,
     #[doc = "The list of logs settings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logs: Vec<LogSettings>,
     #[doc = "The full ARM resource ID of the Log Analytics workspace to which you would like to send Diagnostic Logs. Example: /subscriptions/4b9e8510-67ab-4e9a-95a9-e2f1e570ea9c/resourceGroups/insights-integration/providers/Microsoft.OperationalInsights/workspaces/viruela2"]
     #[serde(rename = "workspaceId", default, skip_serializing_if = "Option::is_none")]
@@ -962,7 +1063,11 @@ impl DiagnosticSettingsCategoryResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticSettingsCategoryResourceCollection {
     #[doc = "The collection of diagnostic settings category resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiagnosticSettingsCategoryResource>,
 }
 impl DiagnosticSettingsCategoryResourceCollection {
@@ -988,7 +1093,11 @@ impl DiagnosticSettingsResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticSettingsResourceCollection {
     #[doc = "The collection of diagnostic settings resources;."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiagnosticSettingsResource>,
 }
 impl DiagnosticSettingsResourceCollection {
@@ -1191,7 +1300,12 @@ pub struct EmailNotification {
     #[serde(rename = "sendToSubscriptionCoAdministrators", default, skip_serializing_if = "Option::is_none")]
     pub send_to_subscription_co_administrators: Option<bool>,
     #[doc = "the custom e-mails list. This value can be null or empty, in which case this attribute will be ignored."]
-    #[serde(rename = "customEmails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customEmails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_emails: Vec<String>,
 }
 impl EmailNotification {
@@ -1310,10 +1424,19 @@ pub struct ErrorResponseCommon {
     #[serde(flatten)]
     pub error_response: ErrorResponse,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseCommon>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponseCommon {
@@ -1500,7 +1623,11 @@ impl Incident {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IncidentListResult {
     #[doc = "the incident collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Incident>,
 }
 impl azure_core::Continuable for IncidentListResult {
@@ -1880,7 +2007,11 @@ impl LogSearchRuleResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogSearchRuleResourceCollection {
     #[doc = "The values for the Log Search Rule resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogSearchRuleResource>,
 }
 impl azure_core::Continuable for LogSearchRuleResourceCollection {
@@ -2140,7 +2271,12 @@ pub struct MetricAlertMultipleResourceMultipleMetricCriteria {
     #[serde(flatten)]
     pub metric_alert_criteria: MetricAlertCriteria,
     #[doc = "the list of multiple metric criteria for this 'all of' operation. "]
-    #[serde(rename = "allOf", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allOf",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub all_of: Vec<MultiMetricCriteria>,
 }
 impl MetricAlertMultipleResourceMultipleMetricCriteria {
@@ -2181,7 +2317,11 @@ pub struct MetricAlertProperties {
     #[serde(rename = "autoMitigate", default, skip_serializing_if = "Option::is_none")]
     pub auto_mitigate: Option<bool>,
     #[doc = "the array of actions that are performed when the alert rule becomes active, and when an alert condition is resolved."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<MetricAlertAction>,
     #[doc = "Last time the rule was updated in ISO8601 format."]
     #[serde(rename = "lastUpdatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -2229,7 +2369,11 @@ pub struct MetricAlertPropertiesPatch {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "the list of resource id's that this metric alert is scoped to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
     #[doc = "how often the metric alert is evaluated represented in ISO 8601 duration format."]
     #[serde(rename = "evaluationFrequency", default, skip_serializing_if = "Option::is_none")]
@@ -2250,7 +2394,11 @@ pub struct MetricAlertPropertiesPatch {
     #[serde(rename = "autoMitigate", default, skip_serializing_if = "Option::is_none")]
     pub auto_mitigate: Option<bool>,
     #[doc = "the array of actions that are performed when the alert rule becomes active, and when an alert condition is resolved."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<MetricAlertAction>,
     #[doc = "Last time the rule was updated in ISO8601 format."]
     #[serde(rename = "lastUpdatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -2281,7 +2429,11 @@ impl MetricAlertResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricAlertResourceCollection {
     #[doc = "the values for the alert rule resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetricAlertResource>,
 }
 impl azure_core::Continuable for MetricAlertResourceCollection {
@@ -2316,7 +2468,12 @@ pub struct MetricAlertSingleResourceMultipleMetricCriteria {
     #[serde(flatten)]
     pub metric_alert_criteria: MetricAlertCriteria,
     #[doc = "The list of metric criteria for this 'all of' operation. "]
-    #[serde(rename = "allOf", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allOf",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub all_of: Vec<MetricCriteria>,
 }
 impl MetricAlertSingleResourceMultipleMetricCriteria {
@@ -2352,7 +2509,11 @@ impl MetricAlertStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricAlertStatusCollection {
     #[doc = "the values for the alert rule resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetricAlertStatus>,
 }
 impl MetricAlertStatusCollection {
@@ -2420,7 +2581,11 @@ impl MetricBaselinesProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricBaselinesResponse {
     #[doc = "The list of metric baselines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SingleMetricBaseline>,
 }
 impl azure_core::Continuable for MetricBaselinesResponse {
@@ -2573,16 +2738,30 @@ pub struct MetricDefinition {
     #[serde(rename = "primaryAggregationType", default, skip_serializing_if = "Option::is_none")]
     pub primary_aggregation_type: Option<AggregationType>,
     #[doc = "the collection of what aggregation types are supported."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<AggregationType>,
     #[doc = "the collection of what aggregation intervals are available to be queried."]
-    #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricAvailabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_availabilities: Vec<MetricAvailability>,
     #[doc = "the resource identifier of the metric definition."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "the name and the display name of the dimension, i.e. it is a localizable string."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<LocalizableString>,
 }
 impl MetricDefinition {
@@ -2744,7 +2923,11 @@ pub struct MetricTrigger {
     #[doc = "the threshold of the metric that triggers the scale action."]
     pub threshold: f64,
     #[doc = "List of dimension conditions. For example: [{\"DimensionName\":\"AppName\",\"Operator\":\"Equals\",\"Values\":[\"App1\"]},{\"DimensionName\":\"Deployment\",\"Operator\":\"Equals\",\"Values\":[\"default\"]}]."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<ScaleRuleMetricDimension>,
     #[doc = "a value indicating whether metric should divide per instance."]
     #[serde(rename = "dividePerInstance", default, skip_serializing_if = "Option::is_none")]
@@ -2903,7 +3086,11 @@ pub struct MultiMetricCriteria {
     #[serde(rename = "timeAggregation")]
     pub time_aggregation: multi_metric_criteria::TimeAggregation,
     #[doc = "List of dimension conditions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Allows creating an alert rule on a custom metric that isn't yet emitted, by causing the metric validation to be skipped."]
     #[serde(rename = "skipMetricValidation", default, skip_serializing_if = "Option::is_none")]
@@ -3089,7 +3276,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Insights provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3145,7 +3336,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3210,7 +3405,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3234,7 +3433,12 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -3574,7 +3778,12 @@ pub struct RuleEmailAction {
     #[serde(rename = "sendToServiceOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_to_service_owners: Option<bool>,
     #[doc = "the list of administrator's custom email addresses to notify of the activation of the alert."]
-    #[serde(rename = "customEmails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customEmails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_emails: Vec<String>,
 }
 impl RuleEmailAction {
@@ -3858,7 +4067,11 @@ impl ScopedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScopedResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScopedResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4026,7 +4239,12 @@ pub struct Source {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub query: Option<String>,
     #[doc = "List of  Resource referred into query"]
-    #[serde(rename = "authorizedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorized_resources: Vec<String>,
     #[doc = "The resource uri over which log search query is to be run."]
     #[serde(rename = "dataSourceId")]
@@ -4099,14 +4317,23 @@ pub struct TimeSeriesBaseline {
     #[doc = "The aggregation type of the metric."]
     pub aggregation: String,
     #[doc = "The dimensions of this time series."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricSingleDimension>,
     #[doc = "The list of timestamps of the baselines."]
     pub timestamps: Vec<time::OffsetDateTime>,
     #[doc = "The baseline values for each sensitivity."]
     pub data: Vec<SingleBaseline>,
     #[doc = "The baseline metadata values."]
-    #[serde(rename = "metadataValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metadataValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata_values: Vec<BaselineMetadata>,
 }
 impl TimeSeriesBaseline {
@@ -4124,10 +4351,18 @@ impl TimeSeriesBaseline {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TimeSeriesElement {
     #[doc = "the metadata values returned if $filter was specified in the call."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadatavalues: Vec<MetadataValue>,
     #[doc = "An array of data points representing the metric values.  This is only returned if a result type of data is specified."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<MetricValue>,
 }
 impl TimeSeriesElement {
@@ -4266,7 +4501,11 @@ pub mod vm_insights_onboarding_status {
         #[serde(rename = "dataStatus")]
         pub data_status: properties::DataStatus,
         #[doc = "Containers that currently store VM Insights data for the specified resource."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub data: Vec<DataContainer>,
     }
     impl Properties {
diff --git a/services/mgmt/monitor/src/package_2021_04/models.rs b/services/mgmt/monitor/src/package_2021_04/models.rs
index 56d6e4f40b..86cd5742f0 100644
--- a/services/mgmt/monitor/src/package_2021_04/models.rs
+++ b/services/mgmt/monitor/src/package_2021_04/models.rs
@@ -24,34 +24,84 @@ pub struct ActionGroup {
     #[doc = "Indicates whether this action group is enabled. If an action group is not enabled, then none of its receivers will receive communications."]
     pub enabled: bool,
     #[doc = "The list of email receivers that are part of this action group."]
-    #[serde(rename = "emailReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_receivers: Vec<EmailReceiver>,
     #[doc = "The list of SMS receivers that are part of this action group."]
-    #[serde(rename = "smsReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "smsReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sms_receivers: Vec<SmsReceiver>,
     #[doc = "The list of webhook receivers that are part of this action group."]
-    #[serde(rename = "webhookReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "webhookReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub webhook_receivers: Vec<WebhookReceiver>,
     #[doc = "The list of ITSM receivers that are part of this action group."]
-    #[serde(rename = "itsmReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "itsmReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub itsm_receivers: Vec<ItsmReceiver>,
     #[doc = "The list of AzureAppPush receivers that are part of this action group."]
-    #[serde(rename = "azureAppPushReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureAppPushReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_app_push_receivers: Vec<AzureAppPushReceiver>,
     #[doc = "The list of AutomationRunbook receivers that are part of this action group."]
-    #[serde(rename = "automationRunbookReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "automationRunbookReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub automation_runbook_receivers: Vec<AutomationRunbookReceiver>,
     #[doc = "The list of voice receivers that are part of this action group."]
-    #[serde(rename = "voiceReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "voiceReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub voice_receivers: Vec<VoiceReceiver>,
     #[doc = "The list of logic app receivers that are part of this action group."]
-    #[serde(rename = "logicAppReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logicAppReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logic_app_receivers: Vec<LogicAppReceiver>,
     #[doc = "The list of azure function receivers that are part of this action group."]
-    #[serde(rename = "azureFunctionReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureFunctionReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_function_receivers: Vec<AzureFunctionReceiver>,
     #[doc = "The list of ARM role receivers that are part of this action group. Roles are Azure RBAC roles and only built-in roles are supported."]
-    #[serde(rename = "armRoleReceivers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "armRoleReceivers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub arm_role_receivers: Vec<ArmRoleReceiver>,
 }
 impl ActionGroup {
@@ -76,7 +126,11 @@ impl ActionGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActionGroupList {
     #[doc = "The list of action groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ActionGroupResource>,
     #[doc = "Provides the link to retrieve the next set of elements."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -186,7 +240,12 @@ impl ActivityLogAlertActionGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActivityLogAlertActionList {
     #[doc = "The list of activity log alerts."]
-    #[serde(rename = "actionGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub action_groups: Vec<ActivityLogAlertActionGroup>,
 }
 impl ActivityLogAlertActionList {
@@ -223,7 +282,11 @@ impl ActivityLogAlertLeafCondition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ActivityLogAlertList {
     #[doc = "The list of activity log alerts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ActivityLogAlertResource>,
     #[doc = "Provides the link to retrieve the next set of elements."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -314,7 +377,11 @@ pub struct AlertRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<RuleAction>,
     #[doc = "the array of actions that are performed when the alert rule becomes active, and when an alert condition is resolved."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<RuleAction>,
     #[doc = "Last time the rule was updated in ISO8601 format."]
     #[serde(rename = "lastUpdatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -351,7 +418,11 @@ impl AlertRuleResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertRuleResourceCollection {
     #[doc = "the values for the alert rule resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AlertRuleResource>,
 }
 impl azure_core::Continuable for AlertRuleResourceCollection {
@@ -523,7 +594,11 @@ pub struct AutoscaleNotification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub email: Option<EmailNotification>,
     #[doc = "the collection of webhook notifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub webhooks: Vec<WebhookNotification>,
 }
 impl AutoscaleNotification {
@@ -576,7 +651,11 @@ pub struct AutoscaleSetting {
     #[doc = "the collection of automatic scaling profiles that specify different scaling parameters for different time periods. A maximum of 20 profiles can be specified."]
     pub profiles: Vec<AutoscaleProfile>,
     #[doc = "the collection of notifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notifications: Vec<AutoscaleNotification>,
     #[doc = "the enabled flag. Specifies whether automatic scaling is enabled for the resource. The default value is 'false'."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -655,7 +734,12 @@ impl AutoscaleSettingResourcePatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzNsActionGroup {
     #[doc = "Azure Action Group reference."]
-    #[serde(rename = "actionGroup", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionGroup",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub action_group: Vec<String>,
     #[doc = "Custom subject override for all email ids in Azure action group"]
     #[serde(rename = "emailSubject", default, skip_serializing_if = "Option::is_none")]
@@ -767,7 +851,12 @@ pub struct AzureMonitorPrivateLinkScopeProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "List of private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl AzureMonitorPrivateLinkScopeProperties {
@@ -892,7 +981,11 @@ pub struct Criteria {
     #[serde(rename = "metricName")]
     pub metric_name: String,
     #[doc = "List of Dimensions for creating metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
 }
 impl Criteria {
@@ -1097,7 +1190,12 @@ pub struct DataCollectionRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub destinations: Option<serde_json::Value>,
     #[doc = "The specification of data flows."]
-    #[serde(rename = "dataFlows", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataFlows",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_flows: Vec<DataFlow>,
     #[doc = "The resource provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1388,10 +1486,18 @@ impl DataContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataFlow {
     #[doc = "List of streams for this data flow."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub streams: Vec<String>,
     #[doc = "List of destinations for this data flow."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destinations: Vec<String>,
 }
 impl DataFlow {
@@ -1403,16 +1509,34 @@ impl DataFlow {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataSourcesSpec {
     #[doc = "The list of performance counter data source configurations."]
-    #[serde(rename = "performanceCounters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "performanceCounters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub performance_counters: Vec<PerfCounterDataSource>,
     #[doc = "The list of Windows Event Log data source configurations."]
-    #[serde(rename = "windowsEventLogs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "windowsEventLogs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub windows_event_logs: Vec<WindowsEventLogDataSource>,
     #[doc = "The list of Syslog data source configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub syslog: Vec<SyslogDataSource>,
     #[doc = "The list of Azure VM extension data source configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<ExtensionDataSource>,
 }
 impl DataSourcesSpec {
@@ -1424,7 +1548,12 @@ impl DataSourcesSpec {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DestinationsSpec {
     #[doc = "List of Log Analytics destinations."]
-    #[serde(rename = "logAnalytics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logAnalytics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_analytics: Vec<LogAnalyticsDestination>,
     #[doc = "Azure Monitor Metrics destination."]
     #[serde(rename = "azureMonitorMetrics", default, skip_serializing_if = "Option::is_none")]
@@ -1451,10 +1580,18 @@ pub struct DiagnosticSettings {
     #[serde(rename = "eventHubName", default, skip_serializing_if = "Option::is_none")]
     pub event_hub_name: Option<String>,
     #[doc = "The list of metric settings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<MetricSettings>,
     #[doc = "The list of logs settings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logs: Vec<LogSettings>,
     #[doc = "The full ARM resource ID of the Log Analytics workspace to which you would like to send Diagnostic Logs. Example: /subscriptions/4b9e8510-67ab-4e9a-95a9-e2f1e570ea9c/resourceGroups/insights-integration/providers/Microsoft.OperationalInsights/workspaces/viruela2"]
     #[serde(rename = "workspaceId", default, skip_serializing_if = "Option::is_none")]
@@ -1507,7 +1644,11 @@ impl DiagnosticSettingsCategoryResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticSettingsCategoryResourceCollection {
     #[doc = "The collection of diagnostic settings category resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiagnosticSettingsCategoryResource>,
 }
 impl DiagnosticSettingsCategoryResourceCollection {
@@ -1533,7 +1674,11 @@ impl DiagnosticSettingsResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticSettingsResourceCollection {
     #[doc = "The collection of diagnostic settings resources;."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiagnosticSettingsResource>,
 }
 impl DiagnosticSettingsResourceCollection {
@@ -1736,7 +1881,12 @@ pub struct EmailNotification {
     #[serde(rename = "sendToSubscriptionCoAdministrators", default, skip_serializing_if = "Option::is_none")]
     pub send_to_subscription_co_administrators: Option<bool>,
     #[doc = "the custom e-mails list. This value can be null or empty, in which case this attribute will be ignored."]
-    #[serde(rename = "customEmails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customEmails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_emails: Vec<String>,
 }
 impl EmailNotification {
@@ -1841,10 +1991,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -1879,10 +2038,19 @@ pub struct ErrorResponseCommon {
     #[serde(flatten)]
     pub error_response: ErrorResponse,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseCommon>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponseCommon {
@@ -2042,7 +2210,11 @@ impl EventDataCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ExtensionDataSource {
     #[doc = "List of streams that this data source will be sent to.\r\nA stream indicates what schema will be used for this data and usually what table in Log Analytics the data will be sent to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub streams: Vec<String>,
     #[doc = "The name of the VM extension."]
     #[serde(rename = "extensionName")]
@@ -2051,7 +2223,12 @@ pub struct ExtensionDataSource {
     #[serde(rename = "extensionSettings", default, skip_serializing_if = "Option::is_none")]
     pub extension_settings: Option<serde_json::Value>,
     #[doc = "The list of data sources this extension needs data from."]
-    #[serde(rename = "inputDataSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputDataSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_data_sources: Vec<String>,
     #[doc = "A friendly name for the data source. \r\nThis name should be unique across all data sources (regardless of type) within the data collection rule."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2117,7 +2294,11 @@ impl Incident {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IncidentListResult {
     #[doc = "the incident collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Incident>,
 }
 impl azure_core::Continuable for IncidentListResult {
@@ -2515,7 +2696,11 @@ impl LogSearchRuleResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogSearchRuleResourceCollection {
     #[doc = "The values for the Log Search Rule resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogSearchRuleResource>,
 }
 impl azure_core::Continuable for LogSearchRuleResourceCollection {
@@ -2787,7 +2972,12 @@ pub struct MetricAlertMultipleResourceMultipleMetricCriteria {
     #[serde(flatten)]
     pub metric_alert_criteria: MetricAlertCriteria,
     #[doc = "the list of multiple metric criteria for this 'all of' operation. "]
-    #[serde(rename = "allOf", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allOf",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub all_of: Vec<MultiMetricCriteria>,
 }
 impl MetricAlertMultipleResourceMultipleMetricCriteria {
@@ -2828,7 +3018,11 @@ pub struct MetricAlertProperties {
     #[serde(rename = "autoMitigate", default, skip_serializing_if = "Option::is_none")]
     pub auto_mitigate: Option<bool>,
     #[doc = "the array of actions that are performed when the alert rule becomes active, and when an alert condition is resolved."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<MetricAlertAction>,
     #[doc = "Last time the rule was updated in ISO8601 format."]
     #[serde(rename = "lastUpdatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -2876,7 +3070,11 @@ pub struct MetricAlertPropertiesPatch {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "the list of resource id's that this metric alert is scoped to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
     #[doc = "how often the metric alert is evaluated represented in ISO 8601 duration format."]
     #[serde(rename = "evaluationFrequency", default, skip_serializing_if = "Option::is_none")]
@@ -2897,7 +3095,11 @@ pub struct MetricAlertPropertiesPatch {
     #[serde(rename = "autoMitigate", default, skip_serializing_if = "Option::is_none")]
     pub auto_mitigate: Option<bool>,
     #[doc = "the array of actions that are performed when the alert rule becomes active, and when an alert condition is resolved."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<MetricAlertAction>,
     #[doc = "Last time the rule was updated in ISO8601 format."]
     #[serde(rename = "lastUpdatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -2928,7 +3130,11 @@ impl MetricAlertResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricAlertResourceCollection {
     #[doc = "the values for the alert rule resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetricAlertResource>,
 }
 impl azure_core::Continuable for MetricAlertResourceCollection {
@@ -2963,7 +3169,12 @@ pub struct MetricAlertSingleResourceMultipleMetricCriteria {
     #[serde(flatten)]
     pub metric_alert_criteria: MetricAlertCriteria,
     #[doc = "The list of metric criteria for this 'all of' operation. "]
-    #[serde(rename = "allOf", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allOf",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub all_of: Vec<MetricCriteria>,
 }
 impl MetricAlertSingleResourceMultipleMetricCriteria {
@@ -2999,7 +3210,11 @@ impl MetricAlertStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricAlertStatusCollection {
     #[doc = "the values for the alert rule resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetricAlertStatus>,
 }
 impl MetricAlertStatusCollection {
@@ -3067,7 +3282,11 @@ impl MetricBaselinesProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricBaselinesResponse {
     #[doc = "The list of metric baselines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SingleMetricBaseline>,
 }
 impl azure_core::Continuable for MetricBaselinesResponse {
@@ -3220,16 +3439,30 @@ pub struct MetricDefinition {
     #[serde(rename = "primaryAggregationType", default, skip_serializing_if = "Option::is_none")]
     pub primary_aggregation_type: Option<AggregationType>,
     #[doc = "the collection of what aggregation types are supported."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<AggregationType>,
     #[doc = "the collection of what aggregation intervals are available to be queried."]
-    #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricAvailabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_availabilities: Vec<MetricAvailability>,
     #[doc = "the resource identifier of the metric definition."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "the name and the display name of the dimension, i.e. it is a localizable string."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<LocalizableString>,
 }
 impl MetricDefinition {
@@ -3391,7 +3624,11 @@ pub struct MetricTrigger {
     #[doc = "the threshold of the metric that triggers the scale action."]
     pub threshold: f64,
     #[doc = "List of dimension conditions. For example: [{\"DimensionName\":\"AppName\",\"Operator\":\"Equals\",\"Values\":[\"App1\"]},{\"DimensionName\":\"Deployment\",\"Operator\":\"Equals\",\"Values\":[\"default\"]}]."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<ScaleRuleMetricDimension>,
     #[doc = "a value indicating whether metric should divide per instance."]
     #[serde(rename = "dividePerInstance", default, skip_serializing_if = "Option::is_none")]
@@ -3550,7 +3787,11 @@ pub struct MultiMetricCriteria {
     #[serde(rename = "timeAggregation")]
     pub time_aggregation: multi_metric_criteria::TimeAggregation,
     #[doc = "List of dimension conditions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Allows creating an alert rule on a custom metric that isn't yet emitted, by causing the metric validation to be skipped."]
     #[serde(rename = "skipMetricValidation", default, skip_serializing_if = "Option::is_none")]
@@ -3788,7 +4029,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Microsoft.Insights provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3830,13 +4075,22 @@ impl OperationStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PerfCounterDataSource {
     #[doc = "List of streams that this data source will be sent to.\r\nA stream indicates what schema will be used for this data and usually what table in Log Analytics the data will be sent to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub streams: Vec<String>,
     #[doc = "The number of seconds between consecutive counter measurements (samples)."]
     #[serde(rename = "samplingFrequencyInSeconds", default, skip_serializing_if = "Option::is_none")]
     pub sampling_frequency_in_seconds: Option<i32>,
     #[doc = "A list of specifier names of the performance counters you want to collect.\r\nUse a wildcard (*) to collect a counter for all instances.\r\nTo get a list of performance counters on Windows, run the command 'typeperf'."]
-    #[serde(rename = "counterSpecifiers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "counterSpecifiers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub counter_specifiers: Vec<String>,
     #[doc = "A friendly name for the data source. \r\nThis name should be unique across all data sources (regardless of type) within the data collection rule."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3865,7 +4119,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3930,7 +4188,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3954,7 +4216,12 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -4306,7 +4573,12 @@ pub struct RuleEmailAction {
     #[serde(rename = "sendToServiceOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_to_service_owners: Option<bool>,
     #[doc = "the list of administrator's custom email addresses to notify of the activation of the alert."]
-    #[serde(rename = "customEmails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customEmails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_emails: Vec<String>,
 }
 impl RuleEmailAction {
@@ -4590,7 +4862,11 @@ impl ScopedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScopedResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScopedResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4758,7 +5034,12 @@ pub struct Source {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub query: Option<String>,
     #[doc = "List of  Resource referred into query"]
-    #[serde(rename = "authorizedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorized_resources: Vec<String>,
     #[doc = "The resource uri over which log search query is to be run."]
     #[serde(rename = "dataSourceId")]
@@ -4781,13 +5062,27 @@ impl Source {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyslogDataSource {
     #[doc = "List of streams that this data source will be sent to.\r\nA stream indicates what schema will be used for this data and usually what table in Log Analytics the data will be sent to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub streams: Vec<String>,
     #[doc = "The list of facility names."]
-    #[serde(rename = "facilityNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "facilityNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub facility_names: Vec<String>,
     #[doc = "The log levels to collect."]
-    #[serde(rename = "logLevels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logLevels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_levels: Vec<String>,
     #[doc = "A friendly name for the data source. \r\nThis name should be unique across all data sources (regardless of type) within the data collection rule."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4852,14 +5147,23 @@ pub struct TimeSeriesBaseline {
     #[doc = "The aggregation type of the metric."]
     pub aggregation: String,
     #[doc = "The dimensions of this time series."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricSingleDimension>,
     #[doc = "The list of timestamps of the baselines."]
     pub timestamps: Vec<time::OffsetDateTime>,
     #[doc = "The baseline values for each sensitivity."]
     pub data: Vec<SingleBaseline>,
     #[doc = "The baseline metadata values."]
-    #[serde(rename = "metadataValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metadataValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata_values: Vec<BaselineMetadata>,
 }
 impl TimeSeriesBaseline {
@@ -4877,10 +5181,18 @@ impl TimeSeriesBaseline {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TimeSeriesElement {
     #[doc = "the metadata values returned if $filter was specified in the call."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadatavalues: Vec<MetadataValue>,
     #[doc = "An array of data points representing the metric values.  This is only returned if a result type of data is specified."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<MetricValue>,
 }
 impl TimeSeriesElement {
@@ -5019,7 +5331,11 @@ pub mod vm_insights_onboarding_status {
         #[serde(rename = "dataStatus")]
         pub data_status: properties::DataStatus,
         #[doc = "Containers that currently store VM Insights data for the specified resource."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub data: Vec<DataContainer>,
     }
     impl Properties {
@@ -5219,10 +5535,19 @@ impl WebtestLocationAvailabilityCriteria {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WindowsEventLogDataSource {
     #[doc = "List of streams that this data source will be sent to.\r\nA stream indicates what schema will be used for this data and usually what table in Log Analytics the data will be sent to."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub streams: Vec<String>,
     #[doc = "A list of Windows Event Log queries in XPATH format."]
-    #[serde(rename = "xPathQueries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "xPathQueries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub x_path_queries: Vec<String>,
     #[doc = "A friendly name for the data source. \r\nThis name should be unique across all data sources (regardless of type) within the data collection rule."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/msi/src/package_2015_08_31_preview/models.rs b/services/mgmt/msi/src/package_2015_08_31_preview/models.rs
index e73fc5f045..7e237d4bd8 100644
--- a/services/mgmt/msi/src/package_2015_08_31_preview/models.rs
+++ b/services/mgmt/msi/src/package_2015_08_31_preview/models.rs
@@ -34,7 +34,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -120,7 +124,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "A list of operations supported by Microsoft.ManagedIdentity Resource Provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The url to get the next page of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -214,7 +222,11 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserAssignedIdentitiesListResult {
     #[doc = "The collection of userAssignedIdentities returned by the listing operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Identity>,
     #[doc = "The url to get the next page of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/msi/src/package_2018_11_30/models.rs b/services/mgmt/msi/src/package_2018_11_30/models.rs
index 3becf78497..1bb99cdb58 100644
--- a/services/mgmt/msi/src/package_2018_11_30/models.rs
+++ b/services/mgmt/msi/src/package_2018_11_30/models.rs
@@ -34,7 +34,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -119,7 +123,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "A list of operations supported by Microsoft.ManagedIdentity Resource Provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The url to get the next page of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -234,7 +242,11 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserAssignedIdentitiesListResult {
     #[doc = "The collection of userAssignedIdentities returned by the listing operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Identity>,
     #[doc = "The url to get the next page of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/msi/src/package_preview_2021_09_30/models.rs b/services/mgmt/msi/src/package_preview_2021_09_30/models.rs
index 089d41ed02..74b26da198 100644
--- a/services/mgmt/msi/src/package_preview_2021_09_30/models.rs
+++ b/services/mgmt/msi/src/package_preview_2021_09_30/models.rs
@@ -10,7 +10,11 @@ pub struct AssociatedResourcesListResult {
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
     pub total_count: Option<f64>,
     #[doc = "The collection of Azure resources returned by the resource action to get a list of assigned resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureResource>,
     #[doc = "The url to get the next page of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -85,7 +89,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -170,7 +178,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "A list of operations supported by Microsoft.ManagedIdentity Resource Provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The url to get the next page of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -285,7 +297,11 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserAssignedIdentitiesListResult {
     #[doc = "The collection of userAssignedIdentities returned by the listing operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Identity>,
     #[doc = "The url to get the next page of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/msi/src/package_preview_2022_01/models.rs b/services/mgmt/msi/src/package_preview_2022_01/models.rs
index 4e939431dc..db28bc68a4 100644
--- a/services/mgmt/msi/src/package_preview_2022_01/models.rs
+++ b/services/mgmt/msi/src/package_preview_2022_01/models.rs
@@ -10,7 +10,11 @@ pub struct AssociatedResourcesListResult {
     #[serde(rename = "totalCount", default, skip_serializing_if = "Option::is_none")]
     pub total_count: Option<f64>,
     #[doc = "The collection of Azure resources returned by the resource action to get a list of assigned resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureResource>,
     #[doc = "The url to get the next page of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -85,7 +89,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -130,7 +138,11 @@ impl FederatedIdentityCredentialProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FederatedIdentityCredentialsListResult {
     #[doc = "The collection of federated identity credentials returned by the listing operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FederatedIdentityCredential>,
     #[doc = "The url to get the next page of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -224,7 +236,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "A list of operations supported by Microsoft.ManagedIdentity Resource Provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The url to get the next page of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -339,7 +355,11 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserAssignedIdentitiesListResult {
     #[doc = "The collection of userAssignedIdentities returned by the listing operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Identity>,
     #[doc = "The url to get the next page of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/mysql/src/package_2020_07_01_preview/models.rs b/services/mgmt/mysql/src/package_2020_07_01_preview/models.rs
index 46904e7c34..965e2eb132 100644
--- a/services/mgmt/mysql/src/package_2020_07_01_preview/models.rs
+++ b/services/mgmt/mysql/src/package_2020_07_01_preview/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesListResult {
     #[doc = "A list of supported capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapabilityProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -31,7 +35,12 @@ pub struct CapabilityProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub zone: Option<String>,
     #[doc = "A list of supported flexible server editions."]
-    #[serde(rename = "supportedFlexibleServerEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFlexibleServerEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_flexible_server_editions: Vec<ServerEditionCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -78,7 +87,11 @@ impl Configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -263,7 +276,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of databases housed in a server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -350,10 +367,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -381,7 +407,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of firewall rules in a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -662,7 +692,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -771,10 +805,20 @@ pub struct ServerEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of supported storage editions"]
-    #[serde(rename = "supportedStorageEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_editions: Vec<StorageEditionCapability>,
     #[doc = "A list of supported server versions."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -824,7 +868,11 @@ impl ServerKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerKeyListResult {
     #[doc = "A list of MySQL Server keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerKey>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -905,7 +953,11 @@ pub mod server_key_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "The list of servers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1210,7 +1262,12 @@ pub struct ServerVersionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of supported Vcores"]
-    #[serde(rename = "supportedVcores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedVcores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_vcores: Vec<VcoreCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1479,7 +1536,12 @@ impl VirtualNetworkSubnetUsageParameter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkSubnetUsageResult {
     #[doc = "A list of delegated subnet usage"]
-    #[serde(rename = "delegatedSubnetsUsage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "delegatedSubnetsUsage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegated_subnets_usage: Vec<DelegatedSubnetUsage>,
 }
 impl VirtualNetworkSubnetUsageResult {
diff --git a/services/mgmt/mysql/src/package_2020_07_01_privatepreview/models.rs b/services/mgmt/mysql/src/package_2020_07_01_privatepreview/models.rs
index 11d5b0ed0d..eeefcea1bc 100644
--- a/services/mgmt/mysql/src/package_2020_07_01_privatepreview/models.rs
+++ b/services/mgmt/mysql/src/package_2020_07_01_privatepreview/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesListResult {
     #[doc = "A list of supported capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapabilityProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -31,7 +35,12 @@ pub struct CapabilityProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub zone: Option<String>,
     #[doc = "A list of supported flexible server editions."]
-    #[serde(rename = "supportedFlexibleServerEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFlexibleServerEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_flexible_server_editions: Vec<ServerEditionCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -78,7 +87,11 @@ impl Configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -263,7 +276,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of databases housed in a server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -350,10 +367,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -381,7 +407,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of firewall rules in a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -659,7 +689,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of resource provider operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationListResult {
@@ -765,10 +799,20 @@ pub struct ServerEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of supported storage editions"]
-    #[serde(rename = "supportedStorageEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_editions: Vec<StorageEditionCapability>,
     #[doc = "A list of supported server versions."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -818,7 +862,11 @@ impl ServerKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerKeyListResult {
     #[doc = "A list of MySQL Server keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerKey>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -899,7 +947,11 @@ pub mod server_key_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "The list of servers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1201,7 +1253,12 @@ pub struct ServerVersionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of supported Vcores"]
-    #[serde(rename = "supportedVcores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedVcores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_vcores: Vec<VcoreCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1470,7 +1527,12 @@ impl VirtualNetworkSubnetUsageParameter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkSubnetUsageResult {
     #[doc = "A list of delegated subnet usage"]
-    #[serde(rename = "delegatedSubnetsUsage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "delegatedSubnetsUsage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegated_subnets_usage: Vec<DelegatedSubnetUsage>,
 }
 impl VirtualNetworkSubnetUsageResult {
diff --git a/services/mgmt/mysql/src/package_flexibleserver_2021_05_01/models.rs b/services/mgmt/mysql/src/package_flexibleserver_2021_05_01/models.rs
index f369035805..1192f5047a 100644
--- a/services/mgmt/mysql/src/package_flexibleserver_2021_05_01/models.rs
+++ b/services/mgmt/mysql/src/package_flexibleserver_2021_05_01/models.rs
@@ -25,7 +25,11 @@ impl Backup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesListResult {
     #[doc = "A list of supported capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapabilityProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -49,13 +53,28 @@ pub struct CapabilityProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub zone: Option<String>,
     #[doc = "Supported high availability mode"]
-    #[serde(rename = "supportedHAMode", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedHAMode",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_ha_mode: Vec<String>,
     #[doc = "supported geo backup regions"]
-    #[serde(rename = "supportedGeoBackupRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedGeoBackupRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_geo_backup_regions: Vec<String>,
     #[doc = "A list of supported flexible server editions."]
-    #[serde(rename = "supportedFlexibleServerEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFlexibleServerEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_flexible_server_editions: Vec<ServerEditionCapability>,
 }
 impl CapabilityProperties {
@@ -135,7 +154,11 @@ pub mod configuration_for_batch_update {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListForBatchUpdate {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationForBatchUpdate>,
 }
 impl ConfigurationListForBatchUpdate {
@@ -147,7 +170,11 @@ impl ConfigurationListForBatchUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -407,7 +434,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of databases housed in a server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -519,10 +550,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -554,7 +594,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of firewall rules in a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -850,7 +894,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL client should use to fetch the next page (per server side paging)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -985,7 +1033,11 @@ impl ServerBackup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerBackupListResult {
     #[doc = "The list of backups of a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerBackup>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1027,10 +1079,20 @@ pub struct ServerEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of supported storage editions"]
-    #[serde(rename = "supportedStorageEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_editions: Vec<StorageEditionCapability>,
     #[doc = "A list of supported server versions."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
 }
 impl ServerEditionCapability {
@@ -1063,7 +1125,11 @@ impl ServerForUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "The list of servers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1322,7 +1388,12 @@ pub struct ServerVersionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of supported Skus"]
-    #[serde(rename = "supportedSkus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedSkus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_skus: Vec<SkuCapability>,
 }
 impl ServerVersionCapability {
@@ -1508,7 +1579,12 @@ pub struct VirtualNetworkSubnetUsageResult {
     #[serde(rename = "subscriptionId", default, skip_serializing_if = "Option::is_none")]
     pub subscription_id: Option<String>,
     #[doc = "A list of delegated subnet usage"]
-    #[serde(rename = "delegatedSubnetsUsage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "delegatedSubnetsUsage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegated_subnets_usage: Vec<DelegatedSubnetUsage>,
 }
 impl VirtualNetworkSubnetUsageResult {
diff --git a/services/mgmt/mysql/src/package_flexibleserver_2021_05_01_preview/models.rs b/services/mgmt/mysql/src/package_flexibleserver_2021_05_01_preview/models.rs
index 2a4d7acd94..ac8c1d2606 100644
--- a/services/mgmt/mysql/src/package_flexibleserver_2021_05_01_preview/models.rs
+++ b/services/mgmt/mysql/src/package_flexibleserver_2021_05_01_preview/models.rs
@@ -25,7 +25,11 @@ impl Backup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesListResult {
     #[doc = "A list of supported capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapabilityProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -49,13 +53,28 @@ pub struct CapabilityProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub zone: Option<String>,
     #[doc = "Supported high availability mode"]
-    #[serde(rename = "supportedHAMode", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedHAMode",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_ha_mode: Vec<String>,
     #[doc = "supported geo backup regions"]
-    #[serde(rename = "supportedGeoBackupRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedGeoBackupRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_geo_backup_regions: Vec<String>,
     #[doc = "A list of supported flexible server editions."]
-    #[serde(rename = "supportedFlexibleServerEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFlexibleServerEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_flexible_server_editions: Vec<ServerEditionCapability>,
 }
 impl CapabilityProperties {
@@ -135,7 +154,11 @@ pub mod configuration_for_batch_update {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListForBatchUpdate {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationForBatchUpdate>,
 }
 impl ConfigurationListForBatchUpdate {
@@ -147,7 +170,11 @@ impl ConfigurationListForBatchUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -374,7 +401,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of databases housed in a server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -486,10 +517,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -521,7 +561,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of firewall rules in a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -816,7 +860,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL client should use to fetch the next page (per server side paging)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -951,7 +999,11 @@ impl ServerBackup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerBackupListResult {
     #[doc = "The list of backups of a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerBackup>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -993,10 +1045,20 @@ pub struct ServerEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of supported storage editions"]
-    #[serde(rename = "supportedStorageEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_editions: Vec<StorageEditionCapability>,
     #[doc = "A list of supported server versions."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
 }
 impl ServerEditionCapability {
@@ -1026,7 +1088,11 @@ impl ServerForUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "The list of servers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1279,7 +1345,12 @@ pub struct ServerVersionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of supported Skus"]
-    #[serde(rename = "supportedSkus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedSkus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_skus: Vec<SkuCapability>,
 }
 impl ServerVersionCapability {
@@ -1444,7 +1515,12 @@ impl VirtualNetworkSubnetUsageParameter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkSubnetUsageResult {
     #[doc = "A list of delegated subnet usage"]
-    #[serde(rename = "delegatedSubnetsUsage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "delegatedSubnetsUsage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegated_subnets_usage: Vec<DelegatedSubnetUsage>,
 }
 impl VirtualNetworkSubnetUsageResult {
diff --git a/services/mgmt/mysql/src/package_flexibleserver_2021_12_01_preview/models.rs b/services/mgmt/mysql/src/package_flexibleserver_2021_12_01_preview/models.rs
index 69c86aff28..7fe29976a8 100644
--- a/services/mgmt/mysql/src/package_flexibleserver_2021_12_01_preview/models.rs
+++ b/services/mgmt/mysql/src/package_flexibleserver_2021_12_01_preview/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdministratorListResult {
     #[doc = "The list of azure ad administrator of a server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureAdAdministrator>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -125,7 +129,11 @@ impl Backup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesListResult {
     #[doc = "A list of supported capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapabilityProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -149,13 +157,28 @@ pub struct CapabilityProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub zone: Option<String>,
     #[doc = "Supported high availability mode"]
-    #[serde(rename = "supportedHAMode", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedHAMode",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_ha_mode: Vec<String>,
     #[doc = "supported geo backup regions"]
-    #[serde(rename = "supportedGeoBackupRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedGeoBackupRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_geo_backup_regions: Vec<String>,
     #[doc = "A list of supported flexible server editions."]
-    #[serde(rename = "supportedFlexibleServerEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFlexibleServerEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_flexible_server_editions: Vec<ServerEditionCapability>,
 }
 impl CapabilityProperties {
@@ -235,7 +258,11 @@ pub mod configuration_for_batch_update {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListForBatchUpdate {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConfigurationForBatchUpdate>,
     #[doc = "Whether to reset all server parameters to default."]
     #[serde(rename = "resetAllToDefault", default, skip_serializing_if = "Option::is_none")]
@@ -290,7 +317,11 @@ pub mod configuration_list_for_batch_update {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -550,7 +581,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of databases housed in a server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -662,10 +697,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -697,7 +741,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of firewall rules in a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -897,7 +945,11 @@ impl LogFile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogFileListResult {
     #[doc = "The list of logFiles in a server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogFile>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1055,7 +1107,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL client should use to fetch the next page (per server side paging)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1190,7 +1246,11 @@ impl ServerBackup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerBackupListResult {
     #[doc = "The list of backups of a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerBackup>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1232,10 +1292,20 @@ pub struct ServerEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of supported storage editions"]
-    #[serde(rename = "supportedStorageEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_editions: Vec<StorageEditionCapability>,
     #[doc = "A list of supported server versions."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
 }
 impl ServerEditionCapability {
@@ -1268,7 +1338,11 @@ impl ServerForUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "The list of servers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1530,7 +1604,12 @@ pub struct ServerVersionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of supported Skus"]
-    #[serde(rename = "supportedSkus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedSkus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_skus: Vec<SkuCapability>,
 }
 impl ServerVersionCapability {
@@ -1716,7 +1795,12 @@ pub struct VirtualNetworkSubnetUsageResult {
     #[serde(rename = "subscriptionId", default, skip_serializing_if = "Option::is_none")]
     pub subscription_id: Option<String>,
     #[doc = "A list of delegated subnet usage"]
-    #[serde(rename = "delegatedSubnetsUsage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "delegatedSubnetsUsage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegated_subnets_usage: Vec<DelegatedSubnetUsage>,
 }
 impl VirtualNetworkSubnetUsageResult {
diff --git a/services/mgmt/netapp/src/package_netapp_2021_06_01/models.rs b/services/mgmt/netapp/src/package_netapp_2021_06_01/models.rs
index a3a3141000..797cda88a3 100644
--- a/services/mgmt/netapp/src/package_netapp_2021_06_01/models.rs
+++ b/services/mgmt/netapp/src/package_netapp_2021_06_01/models.rs
@@ -121,10 +121,20 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Support metric aggregation type."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The supported time grain types for the metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "The internal metric name."]
     #[serde(rename = "internalMetricName", default, skip_serializing_if = "Option::is_none")]
@@ -139,7 +149,11 @@ pub struct MetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "Dimensions of blobs, including blob type and access tier."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Aggregation type could be Average."]
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -211,7 +225,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Storage operations supported by the Storage resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -420,10 +438,20 @@ pub mod resource_name_availability_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "Log specification of operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -452,7 +480,11 @@ impl SubscriptionQuotaItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionQuotaItemList {
     #[doc = "A list of SubscriptionQuotaItems"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionQuotaItem>,
 }
 impl azure_core::Continuable for SubscriptionQuotaItemList {
@@ -500,7 +532,12 @@ pub struct AccountProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "Active Directories"]
-    #[serde(rename = "activeDirectories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeDirectories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_directories: Vec<ActiveDirectory>,
     #[doc = "Encryption settings"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -545,10 +582,19 @@ pub struct ActiveDirectory {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub site: Option<String>,
     #[doc = "Users to be added to the Built-in Backup Operator active directory group. A list of unique usernames without domain specifier"]
-    #[serde(rename = "backupOperators", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupOperators",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_operators: Vec<String>,
     #[doc = "Users to be added to the Built-in Administrators active directory group. A list of unique usernames without domain specifier"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub administrators: Vec<String>,
     #[doc = "kdc server IP addresses for the active directory machine. This optional parameter is used only while creating kerberos volume."]
     #[serde(rename = "kdcIP", default, skip_serializing_if = "Option::is_none")]
@@ -566,7 +612,12 @@ pub struct ActiveDirectory {
     #[serde(rename = "ldapSigning", default, skip_serializing_if = "Option::is_none")]
     pub ldap_signing: Option<bool>,
     #[doc = "Domain Users in the Active directory to be given SeSecurityPrivilege privilege (Needed for SMB Continuously available shares for SQL). A list of unique usernames without domain specifier"]
-    #[serde(rename = "securityOperators", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityOperators",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_operators: Vec<String>,
     #[doc = "Specifies whether or not the LDAP traffic needs to be secured via TLS."]
     #[serde(rename = "ldapOverTLS", default, skip_serializing_if = "Option::is_none")]
@@ -685,7 +736,11 @@ impl BackupPatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupPoliciesList {
     #[doc = "A list of backup policies"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupPolicy>,
 }
 impl azure_core::Continuable for BackupPoliciesList {
@@ -817,7 +872,12 @@ pub struct BackupPolicyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "A list of volumes assigned to this policy"]
-    #[serde(rename = "volumeBackups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeBackups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_backups: Vec<VolumeBackups>,
 }
 impl BackupPolicyProperties {
@@ -1017,7 +1077,11 @@ pub mod backup_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupsList {
     #[doc = "A list of Backups"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Backup>,
 }
 impl azure_core::Continuable for BackupsList {
@@ -1083,7 +1147,11 @@ impl CapacityPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityPoolList {
     #[doc = "List of Capacity pools"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapacityPool>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1419,7 +1487,11 @@ impl NetAppAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetAppAccountList {
     #[doc = "Multiple NetApp accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetAppAccount>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2104,7 +2176,11 @@ impl SnapshotPatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotPoliciesList {
     #[doc = "A list of snapshot policies"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SnapshotPolicy>,
 }
 impl azure_core::Continuable for SnapshotPoliciesList {
@@ -2239,7 +2315,11 @@ impl SnapshotPolicyProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotPolicyVolumeList {
     #[doc = "List of volumes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<serde_json::Value>,
 }
 impl SnapshotPolicyVolumeList {
@@ -2269,7 +2349,11 @@ impl SnapshotProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotsList {
     #[doc = "A list of Snapshots"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Snapshot>,
 }
 impl azure_core::Continuable for SnapshotsList {
@@ -2427,7 +2511,11 @@ impl Vault {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultList {
     #[doc = "A list of vaults"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vault>,
 }
 impl azure_core::Continuable for VaultList {
@@ -2532,7 +2620,11 @@ impl VolumeBackups {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VolumeList {
     #[doc = "List of volumes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Volume>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2614,7 +2706,11 @@ pub mod volume_patch_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ExportPolicy {
         #[doc = "Export policy rule"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub rules: Vec<ExportPolicyRule>,
     }
     impl ExportPolicy {
@@ -2657,7 +2753,12 @@ pub struct VolumeProperties {
     #[serde(rename = "exportPolicy", default, skip_serializing_if = "Option::is_none")]
     pub export_policy: Option<volume_properties::ExportPolicy>,
     #[doc = "Set of protocol types, default NFSv3, CIFS for SMB protocol"]
-    #[serde(rename = "protocolTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protocolTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocol_types: Vec<String>,
     #[doc = "Azure lifecycle management"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2684,7 +2785,12 @@ pub struct VolumeProperties {
     #[serde(rename = "storageToNetworkProximity", default, skip_serializing_if = "Option::is_none")]
     pub storage_to_network_proximity: Option<volume_properties::StorageToNetworkProximity>,
     #[doc = "List of mount targets"]
-    #[serde(rename = "mountTargets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountTargets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_targets: Vec<MountTargetProperties>,
     #[doc = "What type of volume is this. For destination volumes in Cross Region Replication, set type to DataProtection"]
     #[serde(rename = "volumeType", default, skip_serializing_if = "Option::is_none")]
@@ -2789,7 +2895,11 @@ pub mod volume_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ExportPolicy {
         #[doc = "Export policy rule"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub rules: Vec<ExportPolicyRule>,
     }
     impl ExportPolicy {
diff --git a/services/mgmt/netapp/src/package_netapp_2021_08_01/models.rs b/services/mgmt/netapp/src/package_netapp_2021_08_01/models.rs
index 1b10a7fdb5..358f56b19a 100644
--- a/services/mgmt/netapp/src/package_netapp_2021_08_01/models.rs
+++ b/services/mgmt/netapp/src/package_netapp_2021_08_01/models.rs
@@ -121,10 +121,20 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Support metric aggregation type."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The supported time grain types for the metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "The internal metric name."]
     #[serde(rename = "internalMetricName", default, skip_serializing_if = "Option::is_none")]
@@ -139,7 +149,11 @@ pub struct MetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "Dimensions of blobs, including blob type and access tier."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Aggregation type could be Average."]
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -211,7 +225,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Storage operations supported by the Storage resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -420,10 +438,20 @@ pub mod resource_name_availability_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "Log specification of operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -452,7 +480,11 @@ impl SubscriptionQuotaItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionQuotaItemList {
     #[doc = "A list of SubscriptionQuotaItems"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionQuotaItem>,
 }
 impl azure_core::Continuable for SubscriptionQuotaItemList {
@@ -520,7 +552,12 @@ pub struct AccountProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "Active Directories"]
-    #[serde(rename = "activeDirectories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeDirectories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_directories: Vec<ActiveDirectory>,
     #[doc = "Encryption settings"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -565,10 +602,19 @@ pub struct ActiveDirectory {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub site: Option<String>,
     #[doc = "Users to be added to the Built-in Backup Operator active directory group. A list of unique usernames without domain specifier"]
-    #[serde(rename = "backupOperators", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupOperators",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_operators: Vec<String>,
     #[doc = "Users to be added to the Built-in Administrators active directory group. A list of unique usernames without domain specifier"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub administrators: Vec<String>,
     #[doc = "kdc server IP addresses for the active directory machine. This optional parameter is used only while creating kerberos volume."]
     #[serde(rename = "kdcIP", default, skip_serializing_if = "Option::is_none")]
@@ -586,7 +632,12 @@ pub struct ActiveDirectory {
     #[serde(rename = "ldapSigning", default, skip_serializing_if = "Option::is_none")]
     pub ldap_signing: Option<bool>,
     #[doc = "Domain Users in the Active directory to be given SeSecurityPrivilege privilege (Needed for SMB Continuously available shares for SQL). A list of unique usernames without domain specifier"]
-    #[serde(rename = "securityOperators", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityOperators",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_operators: Vec<String>,
     #[doc = "Specifies whether or not the LDAP traffic needs to be secured via TLS."]
     #[serde(rename = "ldapOverTLS", default, skip_serializing_if = "Option::is_none")]
@@ -708,7 +759,11 @@ impl BackupPatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupPoliciesList {
     #[doc = "A list of backup policies"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupPolicy>,
 }
 impl azure_core::Continuable for BackupPoliciesList {
@@ -821,7 +876,12 @@ pub struct BackupPolicyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "A list of volumes assigned to this policy"]
-    #[serde(rename = "volumeBackups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeBackups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_backups: Vec<VolumeBackups>,
 }
 impl BackupPolicyProperties {
@@ -1021,7 +1081,11 @@ pub mod backup_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupsList {
     #[doc = "A list of Backups"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Backup>,
 }
 impl azure_core::Continuable for BackupsList {
@@ -1071,7 +1135,11 @@ impl CapacityPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityPoolList {
     #[doc = "List of Capacity pools"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapacityPool>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1387,7 +1455,11 @@ impl NetAppAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetAppAccountList {
     #[doc = "Multiple NetApp accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetAppAccount>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2085,7 +2157,11 @@ impl SnapshotPatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotPoliciesList {
     #[doc = "A list of snapshot policies"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SnapshotPolicy>,
 }
 impl azure_core::Continuable for SnapshotPoliciesList {
@@ -2204,7 +2280,11 @@ impl SnapshotPolicyProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotPolicyVolumeList {
     #[doc = "List of volumes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Volume>,
 }
 impl SnapshotPolicyVolumeList {
@@ -2234,7 +2314,11 @@ impl SnapshotProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotsList {
     #[doc = "A list of Snapshots"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Snapshot>,
 }
 impl azure_core::Continuable for SnapshotsList {
@@ -2392,7 +2476,11 @@ impl Vault {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultList {
     #[doc = "A list of vaults"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vault>,
 }
 impl azure_core::Continuable for VaultList {
@@ -2532,7 +2620,11 @@ impl VolumeGroupDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VolumeGroupList {
     #[doc = "List of volume Groups"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VolumeGroup>,
 }
 impl azure_core::Continuable for VolumeGroupList {
@@ -2574,7 +2666,12 @@ pub struct VolumeGroupMetaData {
     #[serde(rename = "applicationIdentifier", default, skip_serializing_if = "Option::is_none")]
     pub application_identifier: Option<String>,
     #[doc = "Application specific placement rules for the volume group"]
-    #[serde(rename = "globalPlacementRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "globalPlacementRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub global_placement_rules: Vec<PlacementKeyValuePairs>,
     #[doc = "Application specific identifier of deployment rules for the volume group"]
     #[serde(rename = "deploymentSpecId", default, skip_serializing_if = "Option::is_none")]
@@ -2637,7 +2734,11 @@ pub struct VolumeGroupProperties {
     #[serde(rename = "groupMetaData", default, skip_serializing_if = "Option::is_none")]
     pub group_meta_data: Option<VolumeGroupMetaData>,
     #[doc = "List of volumes from group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volumes: Vec<VolumeGroupVolumeProperties>,
 }
 impl VolumeGroupProperties {
@@ -2678,7 +2779,11 @@ impl VolumeGroupVolumeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VolumeList {
     #[doc = "List of volumes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Volume>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2760,7 +2865,11 @@ pub mod volume_patch_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ExportPolicy {
         #[doc = "Export policy rule"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub rules: Vec<ExportPolicyRule>,
     }
     impl ExportPolicy {
@@ -2803,7 +2912,12 @@ pub struct VolumeProperties {
     #[serde(rename = "exportPolicy", default, skip_serializing_if = "Option::is_none")]
     pub export_policy: Option<volume_properties::ExportPolicy>,
     #[doc = "Set of protocol types, default NFSv3, CIFS for SMB protocol"]
-    #[serde(rename = "protocolTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protocolTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocol_types: Vec<String>,
     #[doc = "Azure lifecycle management"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2830,7 +2944,12 @@ pub struct VolumeProperties {
     #[serde(rename = "storageToNetworkProximity", default, skip_serializing_if = "Option::is_none")]
     pub storage_to_network_proximity: Option<volume_properties::StorageToNetworkProximity>,
     #[doc = "List of mount targets"]
-    #[serde(rename = "mountTargets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountTargets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_targets: Vec<MountTargetProperties>,
     #[doc = "What type of volume is this. For destination volumes in Cross Region Replication, set type to DataProtection"]
     #[serde(rename = "volumeType", default, skip_serializing_if = "Option::is_none")]
@@ -2904,7 +3023,12 @@ pub struct VolumeProperties {
     #[serde(rename = "volumeSpecName", default, skip_serializing_if = "Option::is_none")]
     pub volume_spec_name: Option<String>,
     #[doc = "Application specific placement rules for the particular volume"]
-    #[serde(rename = "placementRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "placementRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub placement_rules: Vec<PlacementKeyValuePairs>,
 }
 impl VolumeProperties {
@@ -2959,7 +3083,11 @@ pub mod volume_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ExportPolicy {
         #[doc = "Export policy rule"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub rules: Vec<ExportPolicyRule>,
     }
     impl ExportPolicy {
diff --git a/services/mgmt/netapp/src/package_netapp_2021_10_01/models.rs b/services/mgmt/netapp/src/package_netapp_2021_10_01/models.rs
index 91a2e7e9b5..fca3e50fae 100644
--- a/services/mgmt/netapp/src/package_netapp_2021_10_01/models.rs
+++ b/services/mgmt/netapp/src/package_netapp_2021_10_01/models.rs
@@ -121,10 +121,20 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Support metric aggregation type."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The supported time grain types for the metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "The internal metric name."]
     #[serde(rename = "internalMetricName", default, skip_serializing_if = "Option::is_none")]
@@ -139,7 +149,11 @@ pub struct MetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "Dimensions of blobs, including blob type and access tier."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Aggregation type could be Average."]
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -211,7 +225,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Storage operations supported by the Storage resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -420,10 +438,20 @@ pub mod resource_name_availability_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "Log specification of operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -452,7 +480,11 @@ impl SubscriptionQuotaItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionQuotaItemList {
     #[doc = "A list of SubscriptionQuotaItems"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionQuotaItem>,
 }
 impl azure_core::Continuable for SubscriptionQuotaItemList {
@@ -520,7 +552,12 @@ pub struct AccountProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "Active Directories"]
-    #[serde(rename = "activeDirectories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeDirectories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_directories: Vec<ActiveDirectory>,
     #[doc = "Encryption settings"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -565,10 +602,19 @@ pub struct ActiveDirectory {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub site: Option<String>,
     #[doc = "Users to be added to the Built-in Backup Operator active directory group. A list of unique usernames without domain specifier"]
-    #[serde(rename = "backupOperators", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupOperators",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_operators: Vec<String>,
     #[doc = "Users to be added to the Built-in Administrators active directory group. A list of unique usernames without domain specifier"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub administrators: Vec<String>,
     #[doc = "kdc server IP addresses for the active directory machine. This optional parameter is used only while creating kerberos volume."]
     #[serde(rename = "kdcIP", default, skip_serializing_if = "Option::is_none")]
@@ -586,7 +632,12 @@ pub struct ActiveDirectory {
     #[serde(rename = "ldapSigning", default, skip_serializing_if = "Option::is_none")]
     pub ldap_signing: Option<bool>,
     #[doc = "Domain Users in the Active directory to be given SeSecurityPrivilege privilege (Needed for SMB Continuously available shares for SQL). A list of unique usernames without domain specifier"]
-    #[serde(rename = "securityOperators", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityOperators",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_operators: Vec<String>,
     #[doc = "Specifies whether or not the LDAP traffic needs to be secured via TLS."]
     #[serde(rename = "ldapOverTLS", default, skip_serializing_if = "Option::is_none")]
@@ -711,7 +762,11 @@ impl BackupPatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupPoliciesList {
     #[doc = "A list of backup policies"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupPolicy>,
 }
 impl azure_core::Continuable for BackupPoliciesList {
@@ -824,7 +879,12 @@ pub struct BackupPolicyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "A list of volumes assigned to this policy"]
-    #[serde(rename = "volumeBackups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeBackups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_backups: Vec<VolumeBackups>,
 }
 impl BackupPolicyProperties {
@@ -1024,7 +1084,11 @@ pub mod backup_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupsList {
     #[doc = "A list of Backups"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Backup>,
 }
 impl azure_core::Continuable for BackupsList {
@@ -1074,7 +1138,11 @@ impl CapacityPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityPoolList {
     #[doc = "List of Capacity pools"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapacityPool>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1428,7 +1496,11 @@ impl NetAppAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetAppAccountList {
     #[doc = "Multiple NetApp accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetAppAccount>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2126,7 +2198,11 @@ impl SnapshotPatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotPoliciesList {
     #[doc = "A list of snapshot policies"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SnapshotPolicy>,
 }
 impl azure_core::Continuable for SnapshotPoliciesList {
@@ -2245,7 +2321,11 @@ impl SnapshotPolicyProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotPolicyVolumeList {
     #[doc = "List of volumes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Volume>,
 }
 impl SnapshotPolicyVolumeList {
@@ -2293,7 +2373,11 @@ impl SnapshotRestoreFiles {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotsList {
     #[doc = "A list of Snapshots"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Snapshot>,
 }
 impl azure_core::Continuable for SnapshotsList {
@@ -2436,7 +2520,11 @@ impl SubvolumeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubvolumesList {
     #[doc = "A list of Subvolumes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubvolumeInfo>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2597,7 +2685,11 @@ impl Vault {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultList {
     #[doc = "A list of vaults"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vault>,
 }
 impl azure_core::Continuable for VaultList {
@@ -2737,7 +2829,11 @@ impl VolumeGroupDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VolumeGroupList {
     #[doc = "List of volume Groups"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VolumeGroup>,
 }
 impl azure_core::Continuable for VolumeGroupList {
@@ -2779,7 +2875,12 @@ pub struct VolumeGroupMetaData {
     #[serde(rename = "applicationIdentifier", default, skip_serializing_if = "Option::is_none")]
     pub application_identifier: Option<String>,
     #[doc = "Application specific placement rules for the volume group"]
-    #[serde(rename = "globalPlacementRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "globalPlacementRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub global_placement_rules: Vec<PlacementKeyValuePairs>,
     #[doc = "Application specific identifier of deployment rules for the volume group"]
     #[serde(rename = "deploymentSpecId", default, skip_serializing_if = "Option::is_none")]
@@ -2842,7 +2943,11 @@ pub struct VolumeGroupProperties {
     #[serde(rename = "groupMetaData", default, skip_serializing_if = "Option::is_none")]
     pub group_meta_data: Option<VolumeGroupMetaData>,
     #[doc = "List of volumes from group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volumes: Vec<VolumeGroupVolumeProperties>,
 }
 impl VolumeGroupProperties {
@@ -2883,7 +2988,11 @@ impl VolumeGroupVolumeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VolumeList {
     #[doc = "List of volumes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Volume>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2968,7 +3077,11 @@ pub mod volume_patch_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ExportPolicy {
         #[doc = "Export policy rule"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub rules: Vec<ExportPolicyRule>,
     }
     impl ExportPolicy {
@@ -3011,7 +3124,12 @@ pub struct VolumeProperties {
     #[serde(rename = "exportPolicy", default, skip_serializing_if = "Option::is_none")]
     pub export_policy: Option<volume_properties::ExportPolicy>,
     #[doc = "Set of protocol types, default NFSv3, CIFS for SMB protocol"]
-    #[serde(rename = "protocolTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protocolTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocol_types: Vec<String>,
     #[doc = "Azure lifecycle management"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3038,7 +3156,12 @@ pub struct VolumeProperties {
     #[serde(rename = "storageToNetworkProximity", default, skip_serializing_if = "Option::is_none")]
     pub storage_to_network_proximity: Option<volume_properties::StorageToNetworkProximity>,
     #[doc = "List of mount targets"]
-    #[serde(rename = "mountTargets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountTargets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_targets: Vec<MountTargetProperties>,
     #[doc = "What type of volume is this. For destination volumes in Cross Region Replication, set type to DataProtection"]
     #[serde(rename = "volumeType", default, skip_serializing_if = "Option::is_none")]
@@ -3115,7 +3238,12 @@ pub struct VolumeProperties {
     #[serde(rename = "volumeSpecName", default, skip_serializing_if = "Option::is_none")]
     pub volume_spec_name: Option<String>,
     #[doc = "Application specific placement rules for the particular volume"]
-    #[serde(rename = "placementRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "placementRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub placement_rules: Vec<PlacementKeyValuePairs>,
     #[doc = "Flag indicating whether subvolume operations are enabled on the volume"]
     #[serde(rename = "enableSubvolumes", default, skip_serializing_if = "Option::is_none")]
@@ -3175,7 +3303,11 @@ pub mod volume_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ExportPolicy {
         #[doc = "Export policy rule"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub rules: Vec<ExportPolicyRule>,
     }
     impl ExportPolicy {
diff --git a/services/mgmt/netapp/src/package_netapp_2022_01_01/models.rs b/services/mgmt/netapp/src/package_netapp_2022_01_01/models.rs
index 0bda3ef2ee..ff82706560 100644
--- a/services/mgmt/netapp/src/package_netapp_2022_01_01/models.rs
+++ b/services/mgmt/netapp/src/package_netapp_2022_01_01/models.rs
@@ -121,10 +121,20 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Support metric aggregation type."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The supported time grain types for the metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "The internal metric name."]
     #[serde(rename = "internalMetricName", default, skip_serializing_if = "Option::is_none")]
@@ -139,7 +149,11 @@ pub struct MetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "Dimensions of blobs, including blob type and access tier."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Aggregation type could be Average."]
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -211,7 +225,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Storage operations supported by the Storage resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -423,10 +441,20 @@ pub mod resource_name_availability_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "Log specification of operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -452,7 +480,11 @@ impl SubscriptionQuotaItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionQuotaItemList {
     #[doc = "A list of SubscriptionQuotaItems"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionQuotaItem>,
 }
 impl azure_core::Continuable for SubscriptionQuotaItemList {
@@ -520,7 +552,12 @@ pub struct AccountProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "Active Directories"]
-    #[serde(rename = "activeDirectories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeDirectories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_directories: Vec<ActiveDirectory>,
     #[doc = "Encryption settings"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -565,10 +602,19 @@ pub struct ActiveDirectory {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub site: Option<String>,
     #[doc = "Users to be added to the Built-in Backup Operator active directory group. A list of unique usernames without domain specifier"]
-    #[serde(rename = "backupOperators", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupOperators",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_operators: Vec<String>,
     #[doc = "Users to be added to the Built-in Administrators active directory group. A list of unique usernames without domain specifier"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub administrators: Vec<String>,
     #[doc = "kdc server IP addresses for the active directory machine. This optional parameter is used only while creating kerberos volume."]
     #[serde(rename = "kdcIP", default, skip_serializing_if = "Option::is_none")]
@@ -586,7 +632,12 @@ pub struct ActiveDirectory {
     #[serde(rename = "ldapSigning", default, skip_serializing_if = "Option::is_none")]
     pub ldap_signing: Option<bool>,
     #[doc = "Domain Users in the Active directory to be given SeSecurityPrivilege privilege (Needed for SMB Continuously available shares for SQL). A list of unique usernames without domain specifier"]
-    #[serde(rename = "securityOperators", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityOperators",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_operators: Vec<String>,
     #[doc = "Specifies whether or not the LDAP traffic needs to be secured via TLS."]
     #[serde(rename = "ldapOverTLS", default, skip_serializing_if = "Option::is_none")]
@@ -711,7 +762,11 @@ impl BackupPatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupPoliciesList {
     #[doc = "A list of backup policies"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupPolicy>,
 }
 impl azure_core::Continuable for BackupPoliciesList {
@@ -824,7 +879,12 @@ pub struct BackupPolicyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "A list of volumes assigned to this policy"]
-    #[serde(rename = "volumeBackups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeBackups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_backups: Vec<VolumeBackups>,
 }
 impl BackupPolicyProperties {
@@ -1024,7 +1084,11 @@ pub mod backup_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupsList {
     #[doc = "A list of Backups"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Backup>,
 }
 impl azure_core::Continuable for BackupsList {
@@ -1074,7 +1138,11 @@ impl CapacityPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityPoolList {
     #[doc = "List of Capacity pools"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapacityPool>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1305,7 +1373,11 @@ impl LdapSearchScopeOpt {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListReplications {
     #[doc = "A list of replications"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Replication>,
 }
 impl azure_core::Continuable for ListReplications {
@@ -1426,7 +1498,11 @@ impl NetAppAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetAppAccountList {
     #[doc = "Multiple NetApp accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetAppAccount>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2245,7 +2321,11 @@ impl SnapshotPatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotPoliciesList {
     #[doc = "A list of snapshot policies"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SnapshotPolicy>,
 }
 impl azure_core::Continuable for SnapshotPoliciesList {
@@ -2364,7 +2444,11 @@ impl SnapshotPolicyProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotPolicyVolumeList {
     #[doc = "List of volumes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Volume>,
 }
 impl SnapshotPolicyVolumeList {
@@ -2412,7 +2496,11 @@ impl SnapshotRestoreFiles {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotsList {
     #[doc = "A list of Snapshots"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Snapshot>,
 }
 impl azure_core::Continuable for SnapshotsList {
@@ -2552,7 +2640,11 @@ impl SubvolumeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubvolumesList {
     #[doc = "A list of Subvolumes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubvolumeInfo>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2713,7 +2805,11 @@ impl Vault {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultList {
     #[doc = "A list of vaults"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vault>,
 }
 impl azure_core::Continuable for VaultList {
@@ -2748,7 +2844,11 @@ pub struct Volume {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "Availability Zone"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Volume properties"]
     pub properties: VolumeProperties,
@@ -2854,7 +2954,11 @@ impl VolumeGroupDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VolumeGroupList {
     #[doc = "List of volume Groups"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VolumeGroup>,
 }
 impl azure_core::Continuable for VolumeGroupList {
@@ -2896,7 +3000,12 @@ pub struct VolumeGroupMetaData {
     #[serde(rename = "applicationIdentifier", default, skip_serializing_if = "Option::is_none")]
     pub application_identifier: Option<String>,
     #[doc = "Application specific placement rules for the volume group"]
-    #[serde(rename = "globalPlacementRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "globalPlacementRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub global_placement_rules: Vec<PlacementKeyValuePairs>,
     #[doc = "Application specific identifier of deployment rules for the volume group"]
     #[serde(rename = "deploymentSpecId", default, skip_serializing_if = "Option::is_none")]
@@ -2959,7 +3068,11 @@ pub struct VolumeGroupProperties {
     #[serde(rename = "groupMetaData", default, skip_serializing_if = "Option::is_none")]
     pub group_meta_data: Option<VolumeGroupMetaData>,
     #[doc = "List of volumes from group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volumes: Vec<VolumeGroupVolumeProperties>,
 }
 impl VolumeGroupProperties {
@@ -3000,7 +3113,11 @@ impl VolumeGroupVolumeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VolumeList {
     #[doc = "List of volumes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Volume>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3085,7 +3202,11 @@ pub mod volume_patch_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ExportPolicy {
         #[doc = "Export policy rule"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub rules: Vec<ExportPolicyRule>,
     }
     impl ExportPolicy {
@@ -3128,7 +3249,12 @@ pub struct VolumeProperties {
     #[serde(rename = "exportPolicy", default, skip_serializing_if = "Option::is_none")]
     pub export_policy: Option<volume_properties::ExportPolicy>,
     #[doc = "Set of protocol types, default NFSv3, CIFS for SMB protocol"]
-    #[serde(rename = "protocolTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protocolTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocol_types: Vec<String>,
     #[doc = "Azure lifecycle management"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3155,7 +3281,12 @@ pub struct VolumeProperties {
     #[serde(rename = "storageToNetworkProximity", default, skip_serializing_if = "Option::is_none")]
     pub storage_to_network_proximity: Option<volume_properties::StorageToNetworkProximity>,
     #[doc = "List of mount targets"]
-    #[serde(rename = "mountTargets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountTargets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_targets: Vec<MountTargetProperties>,
     #[doc = "What type of volume is this. For destination volumes in Cross Region Replication, set type to DataProtection"]
     #[serde(rename = "volumeType", default, skip_serializing_if = "Option::is_none")]
@@ -3235,7 +3366,12 @@ pub struct VolumeProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encrypted: Option<bool>,
     #[doc = "Application specific placement rules for the particular volume"]
-    #[serde(rename = "placementRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "placementRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub placement_rules: Vec<PlacementKeyValuePairs>,
     #[doc = "Flag indicating whether subvolume operations are enabled on the volume"]
     #[serde(rename = "enableSubvolumes", default, skip_serializing_if = "Option::is_none")]
@@ -3296,7 +3432,11 @@ pub mod volume_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ExportPolicy {
         #[doc = "Export policy rule"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub rules: Vec<ExportPolicyRule>,
     }
     impl ExportPolicy {
@@ -3606,7 +3746,11 @@ impl VolumeQuotaRulePatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VolumeQuotaRulesList {
     #[doc = "A list of Volume Quota Rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VolumeQuotaRule>,
 }
 impl azure_core::Continuable for VolumeQuotaRulesList {
diff --git a/services/mgmt/netapp/src/package_netapp_2022_03_01/models.rs b/services/mgmt/netapp/src/package_netapp_2022_03_01/models.rs
index 8792eab5c7..a713a87b8d 100644
--- a/services/mgmt/netapp/src/package_netapp_2022_03_01/models.rs
+++ b/services/mgmt/netapp/src/package_netapp_2022_03_01/models.rs
@@ -121,10 +121,20 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Support metric aggregation type."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The supported time grain types for the metrics."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "The internal metric name."]
     #[serde(rename = "internalMetricName", default, skip_serializing_if = "Option::is_none")]
@@ -139,7 +149,11 @@ pub struct MetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "Dimensions of blobs, including blob type and access tier."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Aggregation type could be Average."]
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -211,7 +225,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Storage operations supported by the Storage resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -423,10 +441,20 @@ pub mod resource_name_availability_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "Log specification of operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -452,7 +480,11 @@ impl SubscriptionQuotaItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionQuotaItemList {
     #[doc = "A list of SubscriptionQuotaItems"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionQuotaItem>,
 }
 impl azure_core::Continuable for SubscriptionQuotaItemList {
@@ -520,7 +552,12 @@ pub struct AccountProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "Active Directories"]
-    #[serde(rename = "activeDirectories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "activeDirectories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub active_directories: Vec<ActiveDirectory>,
     #[doc = "Encryption settings"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -565,10 +602,19 @@ pub struct ActiveDirectory {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub site: Option<String>,
     #[doc = "Users to be added to the Built-in Backup Operator active directory group. A list of unique usernames without domain specifier"]
-    #[serde(rename = "backupOperators", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupOperators",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_operators: Vec<String>,
     #[doc = "Users to be added to the Built-in Administrators active directory group. A list of unique usernames without domain specifier"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub administrators: Vec<String>,
     #[doc = "kdc server IP addresses for the active directory machine. This optional parameter is used only while creating kerberos volume."]
     #[serde(rename = "kdcIP", default, skip_serializing_if = "Option::is_none")]
@@ -586,7 +632,12 @@ pub struct ActiveDirectory {
     #[serde(rename = "ldapSigning", default, skip_serializing_if = "Option::is_none")]
     pub ldap_signing: Option<bool>,
     #[doc = "Domain Users in the Active directory to be given SeSecurityPrivilege privilege (Needed for SMB Continuously available shares for SQL). A list of unique usernames without domain specifier"]
-    #[serde(rename = "securityOperators", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityOperators",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_operators: Vec<String>,
     #[doc = "Specifies whether or not the LDAP traffic needs to be secured via TLS."]
     #[serde(rename = "ldapOverTLS", default, skip_serializing_if = "Option::is_none")]
@@ -711,7 +762,11 @@ impl BackupPatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupPoliciesList {
     #[doc = "A list of backup policies"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupPolicy>,
 }
 impl azure_core::Continuable for BackupPoliciesList {
@@ -824,7 +879,12 @@ pub struct BackupPolicyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "A list of volumes assigned to this policy"]
-    #[serde(rename = "volumeBackups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeBackups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_backups: Vec<VolumeBackups>,
 }
 impl BackupPolicyProperties {
@@ -1024,7 +1084,11 @@ pub mod backup_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupsList {
     #[doc = "A list of Backups"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Backup>,
 }
 impl azure_core::Continuable for BackupsList {
@@ -1074,7 +1138,11 @@ impl CapacityPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapacityPoolList {
     #[doc = "List of Capacity pools"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapacityPool>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1305,7 +1373,11 @@ impl LdapSearchScopeOpt {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListReplications {
     #[doc = "A list of replications"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Replication>,
 }
 impl azure_core::Continuable for ListReplications {
@@ -1426,7 +1498,11 @@ impl NetAppAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetAppAccountList {
     #[doc = "Multiple NetApp accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetAppAccount>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2260,7 +2336,11 @@ impl SnapshotPatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotPoliciesList {
     #[doc = "A list of snapshot policies"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SnapshotPolicy>,
 }
 impl azure_core::Continuable for SnapshotPoliciesList {
@@ -2379,7 +2459,11 @@ impl SnapshotPolicyProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotPolicyVolumeList {
     #[doc = "List of volumes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Volume>,
 }
 impl SnapshotPolicyVolumeList {
@@ -2427,7 +2511,11 @@ impl SnapshotRestoreFiles {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SnapshotsList {
     #[doc = "A list of Snapshots"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Snapshot>,
 }
 impl azure_core::Continuable for SnapshotsList {
@@ -2567,7 +2655,11 @@ impl SubvolumeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubvolumesList {
     #[doc = "A list of Subvolumes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubvolumeInfo>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2728,7 +2820,11 @@ impl Vault {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultList {
     #[doc = "A list of vaults"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vault>,
 }
 impl azure_core::Continuable for VaultList {
@@ -2763,7 +2859,11 @@ pub struct Volume {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "Availability Zone"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Volume properties"]
     pub properties: VolumeProperties,
@@ -2869,7 +2969,11 @@ impl VolumeGroupDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VolumeGroupList {
     #[doc = "List of volume Groups"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VolumeGroup>,
 }
 impl azure_core::Continuable for VolumeGroupList {
@@ -2911,7 +3015,12 @@ pub struct VolumeGroupMetaData {
     #[serde(rename = "applicationIdentifier", default, skip_serializing_if = "Option::is_none")]
     pub application_identifier: Option<String>,
     #[doc = "Application specific placement rules for the volume group"]
-    #[serde(rename = "globalPlacementRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "globalPlacementRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub global_placement_rules: Vec<PlacementKeyValuePairs>,
     #[doc = "Application specific identifier of deployment rules for the volume group"]
     #[serde(rename = "deploymentSpecId", default, skip_serializing_if = "Option::is_none")]
@@ -2974,7 +3083,11 @@ pub struct VolumeGroupProperties {
     #[serde(rename = "groupMetaData", default, skip_serializing_if = "Option::is_none")]
     pub group_meta_data: Option<VolumeGroupMetaData>,
     #[doc = "List of volumes from group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volumes: Vec<VolumeGroupVolumeProperties>,
 }
 impl VolumeGroupProperties {
@@ -3015,7 +3128,11 @@ impl VolumeGroupVolumeProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VolumeList {
     #[doc = "List of volumes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Volume>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3106,7 +3223,11 @@ pub mod volume_patch_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ExportPolicy {
         #[doc = "Export policy rule"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub rules: Vec<ExportPolicyRule>,
     }
     impl ExportPolicy {
@@ -3149,7 +3270,12 @@ pub struct VolumeProperties {
     #[serde(rename = "exportPolicy", default, skip_serializing_if = "Option::is_none")]
     pub export_policy: Option<volume_properties::ExportPolicy>,
     #[doc = "Set of protocol types, default NFSv3, CIFS for SMB protocol"]
-    #[serde(rename = "protocolTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protocolTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocol_types: Vec<String>,
     #[doc = "Azure lifecycle management"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3176,7 +3302,12 @@ pub struct VolumeProperties {
     #[serde(rename = "storageToNetworkProximity", default, skip_serializing_if = "Option::is_none")]
     pub storage_to_network_proximity: Option<volume_properties::StorageToNetworkProximity>,
     #[doc = "List of mount targets"]
-    #[serde(rename = "mountTargets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountTargets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_targets: Vec<MountTargetProperties>,
     #[doc = "What type of volume is this. For destination volumes in Cross Region Replication, set type to DataProtection"]
     #[serde(rename = "volumeType", default, skip_serializing_if = "Option::is_none")]
@@ -3259,7 +3390,12 @@ pub struct VolumeProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encrypted: Option<bool>,
     #[doc = "Application specific placement rules for the particular volume"]
-    #[serde(rename = "placementRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "placementRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub placement_rules: Vec<PlacementKeyValuePairs>,
     #[doc = "Flag indicating whether subvolume operations are enabled on the volume"]
     #[serde(rename = "enableSubvolumes", default, skip_serializing_if = "Option::is_none")]
@@ -3321,7 +3457,11 @@ pub mod volume_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ExportPolicy {
         #[doc = "Export policy rule"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub rules: Vec<ExportPolicyRule>,
     }
     impl ExportPolicy {
@@ -3634,7 +3774,11 @@ impl VolumeQuotaRulePatch {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VolumeQuotaRulesList {
     #[doc = "A list of Volume Quota Rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VolumeQuotaRule>,
 }
 impl azure_core::Continuable for VolumeQuotaRulesList {
diff --git a/services/mgmt/network/src/package_2021_05/models.rs b/services/mgmt/network/src/package_2021_05/models.rs
index 2144dadc5d..36ac38f4ff 100644
--- a/services/mgmt/network/src/package_2021_05/models.rs
+++ b/services/mgmt/network/src/package_2021_05/models.rs
@@ -62,7 +62,12 @@ impl Serialize for Access {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AddressSpace {
     #[doc = "A list of address blocks reserved for this virtual network in CIDR notation."]
-    #[serde(rename = "addressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefixes: Vec<String>,
 }
 impl AddressSpace {
@@ -82,7 +87,11 @@ pub struct ApplicationGateway {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Identity for the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -170,16 +179,31 @@ impl ApplicationGatewayAvailableSslOptions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayAvailableSslOptionsPropertiesFormat {
     #[doc = "List of available Ssl predefined policy."]
-    #[serde(rename = "predefinedPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "predefinedPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub predefined_policies: Vec<SubResource>,
     #[doc = "Ssl predefined policy name enums."]
     #[serde(rename = "defaultPolicy", default, skip_serializing_if = "Option::is_none")]
     pub default_policy: Option<PolicyNameEnum>,
     #[doc = "List of available Ssl cipher suites."]
-    #[serde(rename = "availableCipherSuites", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableCipherSuites",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_cipher_suites: Vec<CipherSuitesEnum>,
     #[doc = "List of available Ssl protocols."]
-    #[serde(rename = "availableProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_protocols: Vec<ProtocolsEnum>,
 }
 impl ApplicationGatewayAvailableSslOptionsPropertiesFormat {
@@ -191,7 +215,11 @@ impl ApplicationGatewayAvailableSslOptionsPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayAvailableSslPredefinedPolicies {
     #[doc = "List of available Ssl predefined policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationGatewaySslPredefinedPolicy>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -212,7 +240,11 @@ impl ApplicationGatewayAvailableSslPredefinedPolicies {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayAvailableWafRuleSetsResult {
     #[doc = "The list of application gateway rule sets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationGatewayFirewallRuleSet>,
 }
 impl ApplicationGatewayAvailableWafRuleSetsResult {
@@ -262,10 +294,20 @@ impl ApplicationGatewayBackendAddressPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayBackendAddressPoolPropertiesFormat {
     #[doc = "Collection of references to IPs defined in network interfaces."]
-    #[serde(rename = "backendIPConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendIPConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_ip_configurations: Vec<NetworkInterfaceIpConfiguration>,
     #[doc = "Backend addresses."]
-    #[serde(rename = "backendAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_addresses: Vec<ApplicationGatewayBackendAddress>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -280,7 +322,12 @@ impl ApplicationGatewayBackendAddressPoolPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayBackendHealth {
     #[doc = "A list of ApplicationGatewayBackendHealthPool resources."]
-    #[serde(rename = "backendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_address_pools: Vec<ApplicationGatewayBackendHealthPool>,
 }
 impl ApplicationGatewayBackendHealth {
@@ -295,7 +342,11 @@ pub struct ApplicationGatewayBackendHealthHttpSettings {
     #[serde(rename = "backendHttpSettings", default, skip_serializing_if = "Option::is_none")]
     pub backend_http_settings: Option<ApplicationGatewayBackendHttpSettings>,
     #[doc = "List of ApplicationGatewayBackendHealthServer resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub servers: Vec<ApplicationGatewayBackendHealthServer>,
 }
 impl ApplicationGatewayBackendHealthHttpSettings {
@@ -325,7 +376,12 @@ pub struct ApplicationGatewayBackendHealthPool {
     #[serde(rename = "backendAddressPool", default, skip_serializing_if = "Option::is_none")]
     pub backend_address_pool: Option<ApplicationGatewayBackendAddressPool>,
     #[doc = "List of ApplicationGatewayBackendHealthHttpSettings resources."]
-    #[serde(rename = "backendHttpSettingsCollection", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendHttpSettingsCollection",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_http_settings_collection: Vec<ApplicationGatewayBackendHealthHttpSettings>,
 }
 impl ApplicationGatewayBackendHealthPool {
@@ -442,10 +498,20 @@ pub struct ApplicationGatewayBackendHttpSettingsPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub probe: Option<SubResource>,
     #[doc = "Array of references to application gateway authentication certificates."]
-    #[serde(rename = "authenticationCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authenticationCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authentication_certificates: Vec<SubResource>,
     #[doc = "Array of references to application gateway trusted root certificates."]
-    #[serde(rename = "trustedRootCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedRootCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_root_certificates: Vec<SubResource>,
     #[doc = "Connection draining allows open connections to a backend server to be active for a specified time after the backend server got removed from the configuration."]
     #[serde(rename = "connectionDraining", default, skip_serializing_if = "Option::is_none")]
@@ -605,7 +671,11 @@ pub struct ApplicationGatewayFirewallDisabledRuleGroup {
     #[serde(rename = "ruleGroupName")]
     pub rule_group_name: String,
     #[doc = "The list of rules that will be disabled. If null, all rules of the rule group will be disabled."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<i32>,
 }
 impl ApplicationGatewayFirewallDisabledRuleGroup {
@@ -885,13 +955,23 @@ pub struct ApplicationGatewayHttpListenerPropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "Custom error configurations of the HTTP listener."]
-    #[serde(rename = "customErrorConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customErrorConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_error_configurations: Vec<ApplicationGatewayCustomError>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "firewallPolicy", default, skip_serializing_if = "Option::is_none")]
     pub firewall_policy: Option<SubResource>,
     #[doc = "List of Host names for HTTP Listener that allows special wildcard characters as well."]
-    #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub host_names: Vec<String>,
 }
 impl ApplicationGatewayHttpListenerPropertiesFormat {
@@ -941,7 +1021,11 @@ impl ApplicationGatewayIpConfigurationPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayListResult {
     #[doc = "List of an application gateways in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationGateway>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1026,7 +1110,12 @@ impl ApplicationGatewayLoadDistributionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayLoadDistributionPolicyPropertiesFormat {
     #[doc = "Load Distribution Targets resource of an application gateway."]
-    #[serde(rename = "loadDistributionTargets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadDistributionTargets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_distribution_targets: Vec<ApplicationGatewayLoadDistributionTarget>,
     #[doc = "Load Distribution Algorithm enums."]
     #[serde(rename = "loadDistributionAlgorithm", default, skip_serializing_if = "Option::is_none")]
@@ -1136,7 +1225,11 @@ impl ApplicationGatewayPathRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayPathRulePropertiesFormat {
     #[doc = "Path rules of URL path map."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<String>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "backendAddressPool", default, skip_serializing_if = "Option::is_none")]
@@ -1192,7 +1285,11 @@ impl ApplicationGatewayPrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayPrivateEndpointConnectionListResult {
     #[doc = "List of private endpoint connections on an application gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationGatewayPrivateEndpointConnection>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1257,7 +1354,12 @@ impl ApplicationGatewayPrivateLinkConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayPrivateLinkConfigurationProperties {
     #[doc = "An array of application gateway private link ip configurations."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<ApplicationGatewayPrivateLinkIpConfiguration>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1342,7 +1444,11 @@ impl ApplicationGatewayPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayPrivateLinkResourceListResult {
     #[doc = "List of private link resources of an application gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationGatewayPrivateLinkResource>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1366,10 +1472,20 @@ pub struct ApplicationGatewayPrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required member names of private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl ApplicationGatewayPrivateLinkResourceProperties {
@@ -1407,7 +1523,12 @@ pub struct ApplicationGatewayProbeHealthResponseMatch {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub body: Option<String>,
     #[doc = "Allowed ranges of healthy status codes. Default range of healthy status codes is 200-399."]
-    #[serde(rename = "statusCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_codes: Vec<String>,
 }
 impl ApplicationGatewayProbeHealthResponseMatch {
@@ -1470,52 +1591,131 @@ pub struct ApplicationGatewayPropertiesFormat {
     #[serde(rename = "operationalState", default, skip_serializing_if = "Option::is_none")]
     pub operational_state: Option<application_gateway_properties_format::OperationalState>,
     #[doc = "Subnets of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "gatewayIPConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gatewayIPConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gateway_ip_configurations: Vec<ApplicationGatewayIpConfiguration>,
     #[doc = "Authentication certificates of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "authenticationCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authenticationCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authentication_certificates: Vec<ApplicationGatewayAuthenticationCertificate>,
     #[doc = "Trusted Root certificates of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "trustedRootCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedRootCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_root_certificates: Vec<ApplicationGatewayTrustedRootCertificate>,
     #[doc = "Trusted client certificates of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "trustedClientCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedClientCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_client_certificates: Vec<ApplicationGatewayTrustedClientCertificate>,
     #[doc = "SSL certificates of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "sslCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sslCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ssl_certificates: Vec<ApplicationGatewaySslCertificate>,
     #[doc = "Frontend IP addresses of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "frontendIPConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendIPConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_ip_configurations: Vec<ApplicationGatewayFrontendIpConfiguration>,
     #[doc = "Frontend ports of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "frontendPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_ports: Vec<ApplicationGatewayFrontendPort>,
     #[doc = "Probes of the application gateway resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub probes: Vec<ApplicationGatewayProbe>,
     #[doc = "Backend address pool of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "backendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_address_pools: Vec<ApplicationGatewayBackendAddressPool>,
     #[doc = "Backend http settings of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "backendHttpSettingsCollection", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendHttpSettingsCollection",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_http_settings_collection: Vec<ApplicationGatewayBackendHttpSettings>,
     #[doc = "Http listeners of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "httpListeners", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpListeners",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_listeners: Vec<ApplicationGatewayHttpListener>,
     #[doc = "SSL profiles of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "sslProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sslProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ssl_profiles: Vec<ApplicationGatewaySslProfile>,
     #[doc = "URL path map of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "urlPathMaps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "urlPathMaps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub url_path_maps: Vec<ApplicationGatewayUrlPathMap>,
     #[doc = "Request routing rules of the application gateway resource."]
-    #[serde(rename = "requestRoutingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestRoutingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_routing_rules: Vec<ApplicationGatewayRequestRoutingRule>,
     #[doc = "Rewrite rules for the application gateway resource."]
-    #[serde(rename = "rewriteRuleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rewriteRuleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rewrite_rule_sets: Vec<ApplicationGatewayRewriteRuleSet>,
     #[doc = "Redirect configurations of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "redirectConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "redirectConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub redirect_configurations: Vec<ApplicationGatewayRedirectConfiguration>,
     #[doc = "Application gateway web application firewall configuration."]
     #[serde(rename = "webApplicationFirewallConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -1533,10 +1733,20 @@ pub struct ApplicationGatewayPropertiesFormat {
     #[serde(rename = "autoscaleConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub autoscale_configuration: Option<ApplicationGatewayAutoscaleConfiguration>,
     #[doc = "PrivateLink configurations on application gateway."]
-    #[serde(rename = "privateLinkConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_configurations: Vec<ApplicationGatewayPrivateLinkConfiguration>,
     #[doc = "Private Endpoint connections on application gateway."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ApplicationGatewayPrivateEndpointConnection>,
     #[doc = "The resource GUID property of the application gateway resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -1545,13 +1755,23 @@ pub struct ApplicationGatewayPropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "Custom error configurations of the application gateway resource."]
-    #[serde(rename = "customErrorConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customErrorConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_error_configurations: Vec<ApplicationGatewayCustomError>,
     #[doc = "If true, associates a firewall policy with an application gateway regardless whether the policy differs from the WAF Config."]
     #[serde(rename = "forceFirewallPolicyAssociation", default, skip_serializing_if = "Option::is_none")]
     pub force_firewall_policy_association: Option<bool>,
     #[doc = "Load distribution policies of the application gateway resource."]
-    #[serde(rename = "loadDistributionPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadDistributionPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_distribution_policies: Vec<ApplicationGatewayLoadDistributionPolicy>,
     #[doc = "Application Gateway global configuration."]
     #[serde(rename = "globalConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -1685,13 +1905,28 @@ pub struct ApplicationGatewayRedirectConfigurationPropertiesFormat {
     #[serde(rename = "includeQueryString", default, skip_serializing_if = "Option::is_none")]
     pub include_query_string: Option<bool>,
     #[doc = "Request routing specifying redirect configuration."]
-    #[serde(rename = "requestRoutingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestRoutingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_routing_rules: Vec<SubResource>,
     #[doc = "Url path maps specifying default redirect configuration."]
-    #[serde(rename = "urlPathMaps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "urlPathMaps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub url_path_maps: Vec<SubResource>,
     #[doc = "Path rules specifying redirect configuration."]
-    #[serde(rename = "pathRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pathRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path_rules: Vec<SubResource>,
 }
 impl ApplicationGatewayRedirectConfigurationPropertiesFormat {
@@ -1811,7 +2046,11 @@ pub struct ApplicationGatewayRewriteRule {
     #[serde(rename = "ruleSequence", default, skip_serializing_if = "Option::is_none")]
     pub rule_sequence: Option<i64>,
     #[doc = "Conditions based on which the action set execution will be evaluated."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<ApplicationGatewayRewriteRuleCondition>,
     #[doc = "Set of actions in the Rewrite Rule in Application Gateway."]
     #[serde(rename = "actionSet", default, skip_serializing_if = "Option::is_none")]
@@ -1826,10 +2065,20 @@ impl ApplicationGatewayRewriteRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayRewriteRuleActionSet {
     #[doc = "Request Header Actions in the Action Set."]
-    #[serde(rename = "requestHeaderConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestHeaderConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_header_configurations: Vec<ApplicationGatewayHeaderConfiguration>,
     #[doc = "Response Header Actions in the Action Set."]
-    #[serde(rename = "responseHeaderConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "responseHeaderConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub response_header_configurations: Vec<ApplicationGatewayHeaderConfiguration>,
     #[doc = "Url configuration of the Actions set in Application Gateway."]
     #[serde(rename = "urlConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -1885,7 +2134,12 @@ impl ApplicationGatewayRewriteRuleSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayRewriteRuleSetPropertiesFormat {
     #[doc = "Rewrite rules in the rewrite rule set."]
-    #[serde(rename = "rewriteRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rewriteRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rewrite_rules: Vec<ApplicationGatewayRewriteRule>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2066,7 +2320,12 @@ impl ApplicationGatewaySslCertificatePropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewaySslPolicy {
     #[doc = "Ssl protocols to be disabled on application gateway."]
-    #[serde(rename = "disabledSslProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledSslProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_ssl_protocols: Vec<ProtocolsEnum>,
     #[doc = "Type of Ssl Policy."]
     #[serde(rename = "policyType", default, skip_serializing_if = "Option::is_none")]
@@ -2075,7 +2334,12 @@ pub struct ApplicationGatewaySslPolicy {
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
     pub policy_name: Option<PolicyNameEnum>,
     #[doc = "Ssl cipher suites to be enabled in the specified order to application gateway."]
-    #[serde(rename = "cipherSuites", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cipherSuites",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cipher_suites: Vec<CipherSuitesEnum>,
     #[doc = "Ssl protocol enums."]
     #[serde(rename = "minProtocolVersion", default, skip_serializing_if = "Option::is_none")]
@@ -2147,7 +2411,12 @@ impl ApplicationGatewaySslPredefinedPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewaySslPredefinedPolicyPropertiesFormat {
     #[doc = "Ssl cipher suites to be enabled in the specified order for application gateway."]
-    #[serde(rename = "cipherSuites", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cipherSuites",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cipher_suites: Vec<CipherSuitesEnum>,
     #[doc = "Ssl protocol enums."]
     #[serde(rename = "minProtocolVersion", default, skip_serializing_if = "Option::is_none")]
@@ -2185,7 +2454,12 @@ impl ApplicationGatewaySslProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewaySslProfilePropertiesFormat {
     #[doc = "Array of references to application gateway trusted client certificates."]
-    #[serde(rename = "trustedClientCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedClientCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_client_certificates: Vec<SubResource>,
     #[doc = "Application Gateway Ssl policy."]
     #[serde(rename = "sslPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -2347,7 +2621,12 @@ pub struct ApplicationGatewayUrlPathMapPropertiesFormat {
     #[serde(rename = "defaultLoadDistributionPolicy", default, skip_serializing_if = "Option::is_none")]
     pub default_load_distribution_policy: Option<SubResource>,
     #[doc = "Path rule of URL path map resource."]
-    #[serde(rename = "pathRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pathRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path_rules: Vec<ApplicationGatewayPathRule>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2373,7 +2652,12 @@ pub struct ApplicationGatewayWebApplicationFirewallConfiguration {
     #[serde(rename = "ruleSetVersion")]
     pub rule_set_version: String,
     #[doc = "The disabled rule groups."]
-    #[serde(rename = "disabledRuleGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledRuleGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_rule_groups: Vec<ApplicationGatewayFirewallDisabledRuleGroup>,
     #[doc = "Whether allow WAF to check request Body."]
     #[serde(rename = "requestBodyCheck", default, skip_serializing_if = "Option::is_none")]
@@ -2388,7 +2672,11 @@ pub struct ApplicationGatewayWebApplicationFirewallConfiguration {
     #[serde(rename = "fileUploadLimitInMb", default, skip_serializing_if = "Option::is_none")]
     pub file_upload_limit_in_mb: Option<i32>,
     #[doc = "The exclusion list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ApplicationGatewayFirewallExclusion>,
 }
 impl ApplicationGatewayWebApplicationFirewallConfiguration {
@@ -2458,31 +2746,70 @@ pub struct ApplicationRule {
     #[serde(flatten)]
     pub firewall_policy_rule: FirewallPolicyRule,
     #[doc = "List of source IP addresses for this rule."]
-    #[serde(rename = "sourceAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_addresses: Vec<String>,
     #[doc = "List of destination IP addresses or Service Tags."]
-    #[serde(rename = "destinationAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_addresses: Vec<String>,
     #[doc = "Array of Application Protocols."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<FirewallPolicyRuleApplicationProtocol>,
     #[doc = "List of FQDNs for this rule."]
-    #[serde(rename = "targetFqdns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetFqdns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_fqdns: Vec<String>,
     #[doc = "List of Urls for this rule condition."]
-    #[serde(rename = "targetUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_urls: Vec<String>,
     #[doc = "List of FQDN Tags for this rule."]
-    #[serde(rename = "fqdnTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fqdnTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdn_tags: Vec<String>,
     #[doc = "List of source IpGroups for this rule."]
-    #[serde(rename = "sourceIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_groups: Vec<String>,
     #[doc = "Terminate TLS connections for this rule."]
     #[serde(rename = "terminateTLS", default, skip_serializing_if = "Option::is_none")]
     pub terminate_tls: Option<bool>,
     #[doc = "List of destination azure web categories."]
-    #[serde(rename = "webCategories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "webCategories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub web_categories: Vec<String>,
 }
 impl ApplicationRule {
@@ -2522,7 +2849,11 @@ impl ApplicationSecurityGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationSecurityGroupListResult {
     #[doc = "A list of application security groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationSecurityGroup>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2597,7 +2928,11 @@ impl Serialize for AuthenticationMethod {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationListResult {
     #[doc = "The authorizations in an ExpressRoute Circuit."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCircuitAuthorization>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2688,7 +3023,11 @@ impl AutoApprovedPrivateLinkService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AutoApprovedPrivateLinkServicesResult {
     #[doc = "An array of auto approved private link service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AutoApprovedPrivateLinkService>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2739,7 +3078,11 @@ pub struct AvailableDelegation {
     #[serde(rename = "serviceName", default, skip_serializing_if = "Option::is_none")]
     pub service_name: Option<String>,
     #[doc = "The actions permitted to the service upon delegation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
 }
 impl AvailableDelegation {
@@ -2751,7 +3094,11 @@ impl AvailableDelegation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableDelegationsResult {
     #[doc = "An array of available delegations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableDelegation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2796,7 +3143,11 @@ impl AvailablePrivateEndpointType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailablePrivateEndpointTypesResult {
     #[doc = "An array of available privateEndpoint type."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailablePrivateEndpointType>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2831,7 +3182,11 @@ pub struct AvailableProvidersListCity {
     #[serde(rename = "cityName", default, skip_serializing_if = "Option::is_none")]
     pub city_name: Option<String>,
     #[doc = "A list of Internet service providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub providers: Vec<String>,
 }
 impl AvailableProvidersListCity {
@@ -2846,10 +3201,18 @@ pub struct AvailableProvidersListCountry {
     #[serde(rename = "countryName", default, skip_serializing_if = "Option::is_none")]
     pub country_name: Option<String>,
     #[doc = "A list of Internet service providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub providers: Vec<String>,
     #[doc = "List of available states in the country."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub states: Vec<AvailableProvidersListState>,
 }
 impl AvailableProvidersListCountry {
@@ -2861,7 +3224,12 @@ impl AvailableProvidersListCountry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableProvidersListParameters {
     #[doc = "A list of Azure regions."]
-    #[serde(rename = "azureLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_locations: Vec<String>,
     #[doc = "The country for available providers list."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2885,10 +3253,18 @@ pub struct AvailableProvidersListState {
     #[serde(rename = "stateName", default, skip_serializing_if = "Option::is_none")]
     pub state_name: Option<String>,
     #[doc = "A list of Internet service providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub providers: Vec<String>,
     #[doc = "List of available cities or towns in the state."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cities: Vec<AvailableProvidersListCity>,
 }
 impl AvailableProvidersListState {
@@ -2921,7 +3297,11 @@ impl AvailableServiceAlias {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableServiceAliasesResult {
     #[doc = "An array of available service aliases."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableServiceAlias>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3004,7 +3384,11 @@ pub struct AzureFirewall {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<AzureFirewallPropertiesFormat>,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "A unique read-only string that changes whenever the resource is updated."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3033,19 +3417,43 @@ pub struct AzureFirewallApplicationRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of source IP addresses for this rule."]
-    #[serde(rename = "sourceAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_addresses: Vec<String>,
     #[doc = "Array of ApplicationRuleProtocols."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<AzureFirewallApplicationRuleProtocol>,
     #[doc = "List of FQDNs for this rule."]
-    #[serde(rename = "targetFqdns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetFqdns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_fqdns: Vec<String>,
     #[doc = "List of FQDN Tags for this rule."]
-    #[serde(rename = "fqdnTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fqdnTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdn_tags: Vec<String>,
     #[doc = "List of source IpGroups for this rule."]
-    #[serde(rename = "sourceIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_groups: Vec<String>,
 }
 impl AzureFirewallApplicationRule {
@@ -3083,7 +3491,11 @@ pub struct AzureFirewallApplicationRuleCollectionPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<AzureFirewallRcAction>,
     #[doc = "Collection of rules used by a application rule collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<AzureFirewallApplicationRule>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3169,7 +3581,11 @@ impl AzureFirewallFqdnTag {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureFirewallFqdnTagListResult {
     #[doc = "List of Azure Firewall FQDN Tags in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureFirewallFqdnTag>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3264,7 +3680,11 @@ impl AzureFirewallIpGroups {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureFirewallListResult {
     #[doc = "List of Azure Firewalls in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureFirewall>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3340,16 +3760,35 @@ pub struct AzureFirewallNatRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of source IP addresses for this rule."]
-    #[serde(rename = "sourceAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_addresses: Vec<String>,
     #[doc = "List of destination IP addresses for this rule. Supports IP ranges, prefixes, and service tags."]
-    #[serde(rename = "destinationAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_addresses: Vec<String>,
     #[doc = "List of destination ports."]
-    #[serde(rename = "destinationPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ports: Vec<String>,
     #[doc = "Array of AzureFirewallNetworkRuleProtocols applicable to this NAT rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<AzureFirewallNetworkRuleProtocol>,
     #[doc = "The translated address for this NAT rule."]
     #[serde(rename = "translatedAddress", default, skip_serializing_if = "Option::is_none")]
@@ -3361,7 +3800,12 @@ pub struct AzureFirewallNatRule {
     #[serde(rename = "translatedFqdn", default, skip_serializing_if = "Option::is_none")]
     pub translated_fqdn: Option<String>,
     #[doc = "List of source IpGroups for this rule."]
-    #[serde(rename = "sourceIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_groups: Vec<String>,
 }
 impl AzureFirewallNatRule {
@@ -3399,7 +3843,11 @@ pub struct AzureFirewallNatRuleCollectionProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<AzureFirewallNatRcAction>,
     #[doc = "Collection of rules used by a NAT rule collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<AzureFirewallNatRule>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3420,25 +3868,59 @@ pub struct AzureFirewallNetworkRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Array of AzureFirewallNetworkRuleProtocols."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<AzureFirewallNetworkRuleProtocol>,
     #[doc = "List of source IP addresses for this rule."]
-    #[serde(rename = "sourceAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_addresses: Vec<String>,
     #[doc = "List of destination IP addresses."]
-    #[serde(rename = "destinationAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_addresses: Vec<String>,
     #[doc = "List of destination ports."]
-    #[serde(rename = "destinationPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ports: Vec<String>,
     #[doc = "List of destination FQDNs."]
-    #[serde(rename = "destinationFqdns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationFqdns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_fqdns: Vec<String>,
     #[doc = "List of source IpGroups for this rule."]
-    #[serde(rename = "sourceIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_groups: Vec<String>,
     #[doc = "List of destination IpGroups for this rule."]
-    #[serde(rename = "destinationIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ip_groups: Vec<String>,
 }
 impl AzureFirewallNetworkRule {
@@ -3476,7 +3958,11 @@ pub struct AzureFirewallNetworkRuleCollectionPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<AzureFirewallRcAction>,
     #[doc = "Collection of rules used by a network rule collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<AzureFirewallNetworkRule>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3535,16 +4021,36 @@ impl Serialize for AzureFirewallNetworkRuleProtocol {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureFirewallPropertiesFormat {
     #[doc = "Collection of application rule collections used by Azure Firewall."]
-    #[serde(rename = "applicationRuleCollections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationRuleCollections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_rule_collections: Vec<AzureFirewallApplicationRuleCollection>,
     #[doc = "Collection of NAT rule collections used by Azure Firewall."]
-    #[serde(rename = "natRuleCollections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "natRuleCollections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nat_rule_collections: Vec<AzureFirewallNatRuleCollection>,
     #[doc = "Collection of network rule collections used by Azure Firewall."]
-    #[serde(rename = "networkRuleCollections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkRuleCollections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_rule_collections: Vec<AzureFirewallNetworkRuleCollection>,
     #[doc = "IP configuration of the Azure Firewall resource."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<AzureFirewallIpConfiguration>,
     #[doc = "IP configuration of an Azure Firewall."]
     #[serde(rename = "managementIpConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -3811,7 +4317,11 @@ pub struct AzureReachabilityReportItem {
     #[serde(rename = "azureLocation", default, skip_serializing_if = "Option::is_none")]
     pub azure_location: Option<String>,
     #[doc = "List of latency details for each of the time series."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub latencies: Vec<AzureReachabilityReportLatencyInfo>,
 }
 impl AzureReachabilityReportItem {
@@ -3862,10 +4372,19 @@ pub struct AzureReachabilityReportParameters {
     #[serde(rename = "providerLocation")]
     pub provider_location: AzureReachabilityReportLocation,
     #[doc = "List of Internet service providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub providers: Vec<String>,
     #[doc = "Optional Azure regions to scope the query to."]
-    #[serde(rename = "azureLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_locations: Vec<String>,
     #[doc = "The start time for the Azure reachability report."]
     #[serde(rename = "startTime", with = "azure_core::date::rfc3339")]
@@ -3917,7 +4436,11 @@ impl AzureWebCategory {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureWebCategoryListResult {
     #[doc = "List of Azure Web Categories for a given Subscription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureWebCategory>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3959,7 +4482,12 @@ pub struct BgpCommunity {
     #[serde(rename = "communityValue", default, skip_serializing_if = "Option::is_none")]
     pub community_value: Option<String>,
     #[doc = "The prefixes that the bgp community contains."]
-    #[serde(rename = "communityPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "communityPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub community_prefixes: Vec<String>,
     #[doc = "Customer is authorized to use bgp community or not."]
     #[serde(rename = "isAuthorizedToUse", default, skip_serializing_if = "Option::is_none")]
@@ -3977,7 +4505,12 @@ impl BgpCommunity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendAddressInboundNatRulePortMappings {
     #[doc = "Collection of inbound NAT rule port mappings."]
-    #[serde(rename = "inboundNatRulePortMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatRulePortMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_rule_port_mappings: Vec<InboundNatRulePortMapping>,
 }
 impl BackendAddressInboundNatRulePortMappings {
@@ -4015,25 +4548,55 @@ pub struct BackendAddressPoolPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "An array of gateway load balancer tunnel interfaces."]
-    #[serde(rename = "tunnelInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tunnelInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tunnel_interfaces: Vec<GatewayLoadBalancerTunnelInterface>,
     #[doc = "An array of backend addresses."]
-    #[serde(rename = "loadBalancerBackendAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_addresses: Vec<LoadBalancerBackendAddress>,
     #[doc = "An array of references to IP addresses defined in network interfaces."]
-    #[serde(rename = "backendIPConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendIPConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_ip_configurations: Vec<NetworkInterfaceIpConfiguration>,
     #[doc = "An array of references to load balancing rules that use this backend address pool."]
-    #[serde(rename = "loadBalancingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_rules: Vec<SubResource>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "outboundRule", default, skip_serializing_if = "Option::is_none")]
     pub outbound_rule: Option<SubResource>,
     #[doc = "An array of references to outbound rules that use this backend address pool."]
-    #[serde(rename = "outboundRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outboundRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outbound_rules: Vec<SubResource>,
     #[doc = "An array of references to inbound NAT rules that use this backend address pool."]
-    #[serde(rename = "inboundNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_rules: Vec<SubResource>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -4132,7 +4695,11 @@ pub mod bastion_active_session {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BastionActiveSessionListResult {
     #[doc = "List of active sessions on the bastion."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BastionActiveSession>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4221,7 +4788,11 @@ impl BastionHostIpConfigurationPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BastionHostListResult {
     #[doc = "List of Bastion Hosts in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BastionHost>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4242,7 +4813,12 @@ impl BastionHostListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BastionHostPropertiesFormat {
     #[doc = "IP configuration of the Bastion Host resource."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<BastionHostIpConfiguration>,
     #[doc = "FQDN for the endpoint on which bastion host is accessible."]
     #[serde(rename = "dnsName", default, skip_serializing_if = "Option::is_none")]
@@ -4278,7 +4854,11 @@ impl BastionHostPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BastionSessionDeleteResult {
     #[doc = "List of sessions with their corresponding state."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BastionSessionState>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4342,7 +4922,11 @@ impl BastionShareableLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BastionShareableLinkListRequest {
     #[doc = "List of VM references."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vms: Vec<BastionShareableLink>,
 }
 impl BastionShareableLinkListRequest {
@@ -4354,7 +4938,11 @@ impl BastionShareableLinkListRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BastionShareableLinkListResult {
     #[doc = "List of Bastion Shareable Links for the request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BastionShareableLink>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4545,7 +5133,11 @@ pub mod bgp_peer_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BgpPeerStatusListResult {
     #[doc = "List of BGP peers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BgpPeerStatus>,
 }
 impl BgpPeerStatusListResult {
@@ -4571,7 +5163,11 @@ impl BgpServiceCommunity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BgpServiceCommunityListResult {
     #[doc = "A list of service community resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BgpServiceCommunity>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4595,7 +5191,12 @@ pub struct BgpServiceCommunityPropertiesFormat {
     #[serde(rename = "serviceName", default, skip_serializing_if = "Option::is_none")]
     pub service_name: Option<String>,
     #[doc = "A list of bgp communities."]
-    #[serde(rename = "bgpCommunities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bgpCommunities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bgp_communities: Vec<BgpCommunity>,
 }
 impl BgpServiceCommunityPropertiesFormat {
@@ -4616,7 +5217,12 @@ pub struct BgpSettings {
     #[serde(rename = "peerWeight", default, skip_serializing_if = "Option::is_none")]
     pub peer_weight: Option<i32>,
     #[doc = "BGP peering address with IP configuration ID for virtual network gateway."]
-    #[serde(rename = "bgpPeeringAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bgpPeeringAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bgp_peering_addresses: Vec<IpConfigurationBgpPeeringAddress>,
 }
 impl BgpSettings {
@@ -4891,7 +5497,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -5078,7 +5688,11 @@ pub struct ConnectionMonitorEndpointFilter {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<connection_monitor_endpoint_filter::Type>,
     #[doc = "List of items in the filter."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ConnectionMonitorEndpointFilterItem>,
 }
 impl ConnectionMonitorEndpointFilter {
@@ -5181,10 +5795,18 @@ pub mod connection_monitor_endpoint_filter_item {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionMonitorEndpointScope {
     #[doc = "List of items which needs to be included to the endpoint scope."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub include: Vec<ConnectionMonitorEndpointScopeItem>,
     #[doc = "List of items which needs to be excluded from the endpoint scope."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude: Vec<ConnectionMonitorEndpointScopeItem>,
 }
 impl ConnectionMonitorEndpointScope {
@@ -5217,10 +5839,20 @@ pub struct ConnectionMonitorHttpConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "The HTTP headers to transmit with the request."]
-    #[serde(rename = "requestHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_headers: Vec<HttpHeader>,
     #[doc = "HTTP status codes to consider successful. For instance, \"2xx,301-304,418\"."]
-    #[serde(rename = "validStatusCodeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validStatusCodeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub valid_status_code_ranges: Vec<String>,
     #[doc = "Value indicating whether HTTPS is preferred over HTTP in cases where the choice is not explicit."]
     #[serde(rename = "preferHTTPS", default, skip_serializing_if = "Option::is_none")]
@@ -5287,7 +5919,11 @@ impl ConnectionMonitorIcmpConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionMonitorListResult {
     #[doc = "Information about connection monitors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectionMonitorResult>,
 }
 impl azure_core::Continuable for ConnectionMonitorListResult {
@@ -5370,16 +6006,34 @@ pub struct ConnectionMonitorParameters {
     #[serde(rename = "monitoringIntervalInSeconds", default, skip_serializing_if = "Option::is_none")]
     pub monitoring_interval_in_seconds: Option<i32>,
     #[doc = "List of connection monitor endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<ConnectionMonitorEndpoint>,
     #[doc = "List of connection monitor test configurations."]
-    #[serde(rename = "testConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "testConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub test_configurations: Vec<ConnectionMonitorTestConfiguration>,
     #[doc = "List of connection monitor test groups."]
-    #[serde(rename = "testGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "testGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub test_groups: Vec<ConnectionMonitorTestGroup>,
     #[doc = "List of connection monitor outputs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<ConnectionMonitorOutput>,
     #[doc = "Optional notes to be associated with the connection monitor."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5397,7 +6051,11 @@ pub struct ConnectionMonitorQueryResult {
     #[serde(rename = "sourceStatus", default, skip_serializing_if = "Option::is_none")]
     pub source_status: Option<connection_monitor_query_result::SourceStatus>,
     #[doc = "Information about connection states."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub states: Vec<ConnectionStateSnapshot>,
 }
 impl ConnectionMonitorQueryResult {
@@ -5886,7 +6544,11 @@ pub struct ConnectionStateSnapshot {
     #[serde(rename = "probesFailed", default, skip_serializing_if = "Option::is_none")]
     pub probes_failed: Option<i64>,
     #[doc = "List of hops between the source and the destination."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hops: Vec<ConnectivityHop>,
 }
 impl ConnectionStateSnapshot {
@@ -6009,19 +6671,42 @@ pub struct ConnectivityHop {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "List of next hop identifiers."]
-    #[serde(rename = "nextHopIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nextHopIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub next_hop_ids: Vec<String>,
     #[doc = "List of previous hop identifiers."]
-    #[serde(rename = "previousHopIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "previousHopIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub previous_hop_ids: Vec<String>,
     #[doc = "List of hop links."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<HopLink>,
     #[doc = "List of previous hop links."]
-    #[serde(rename = "previousLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "previousLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub previous_links: Vec<HopLink>,
     #[doc = "List of issues."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issues: Vec<ConnectivityIssue>,
 }
 impl ConnectivityHop {
@@ -6033,7 +6718,11 @@ impl ConnectivityHop {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectivityInformation {
     #[doc = "List of hops between the source and the destination."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hops: Vec<ConnectivityHop>,
     #[doc = "The connection status."]
     #[serde(rename = "connectionStatus", default, skip_serializing_if = "Option::is_none")]
@@ -6116,7 +6805,11 @@ pub struct ConnectivityIssue {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<connectivity_issue::Type>,
     #[doc = "Provides additional context on the issue."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub context: Vec<IssueContext>,
 }
 impl ConnectivityIssue {
@@ -6402,10 +7095,20 @@ impl ContainerNetworkInterfaceConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerNetworkInterfaceConfigurationPropertiesFormat {
     #[doc = "A list of ip configurations of the container network interface configuration."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<IpConfigurationProfile>,
     #[doc = "A list of container network interfaces created from this container network interface configuration."]
-    #[serde(rename = "containerNetworkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerNetworkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_network_interfaces: Vec<SubResource>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -6463,7 +7166,12 @@ pub struct ContainerNetworkInterfacePropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub container: Option<Container>,
     #[doc = "Reference to the ip configuration on this container nic."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<ContainerNetworkInterfaceIpConfiguration>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -6481,7 +7189,12 @@ pub struct CustomDnsConfigPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub fqdn: Option<String>,
     #[doc = "A list of private ip addresses of the private endpoint."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
 }
 impl CustomDnsConfigPropertiesFormat {
@@ -6504,7 +7217,11 @@ pub struct CustomIpPrefix {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "A list of availability zones denoting the IP allocated for the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl CustomIpPrefix {
@@ -6516,7 +7233,11 @@ impl CustomIpPrefix {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomIpPrefixListResult {
     #[doc = "A list of Custom IP prefixes that exists in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomIpPrefix>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6549,13 +7270,23 @@ pub struct CustomIpPrefixPropertiesFormat {
     #[serde(rename = "customIpPrefixParent", default, skip_serializing_if = "Option::is_none")]
     pub custom_ip_prefix_parent: Option<SubResource>,
     #[doc = "The list of all Children for IPv6 /48 CustomIpPrefix."]
-    #[serde(rename = "childCustomIpPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childCustomIpPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_custom_ip_prefixes: Vec<SubResource>,
     #[doc = "The commissioned state of the Custom IP Prefix."]
     #[serde(rename = "commissionedState", default, skip_serializing_if = "Option::is_none")]
     pub commissioned_state: Option<custom_ip_prefix_properties_format::CommissionedState>,
     #[doc = "The list of all referenced PublicIpPrefixes."]
-    #[serde(rename = "publicIpPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIpPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_prefixes: Vec<SubResource>,
     #[doc = "The resource GUID property of the custom IP prefix resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -6647,10 +7378,20 @@ pub struct DdosCustomPolicyPropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "The list of public IPs associated with the DDoS custom policy resource. This list is read-only."]
-    #[serde(rename = "publicIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<SubResource>,
     #[doc = "The protocol-specific DDoS policy customization parameters."]
-    #[serde(rename = "protocolCustomSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protocolCustomSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocol_custom_settings: Vec<ProtocolCustomSettingsFormat>,
 }
 impl DdosCustomPolicyPropertiesFormat {
@@ -6692,7 +7433,11 @@ impl DdosProtectionPlan {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DdosProtectionPlanListResult {
     #[doc = "A list of DDoS protection plans."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DdosProtectionPlan>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6719,7 +7464,12 @@ pub struct DdosProtectionPlanPropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "The list of virtual networks associated with the DDoS protection plan resource. This list is read-only."]
-    #[serde(rename = "virtualNetworks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_networks: Vec<SubResource>,
 }
 impl DdosProtectionPlanPropertiesFormat {
@@ -6886,7 +7636,12 @@ impl Serialize for DhGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DhcpOptions {
     #[doc = "The list of DNS servers IP addresses."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl DhcpOptions {
@@ -6965,7 +7720,11 @@ impl DnsNameAvailabilityResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DnsSettings {
     #[doc = "List of Custom DNS Servers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub servers: Vec<String>,
     #[doc = "Enable DNS Proxy on Firewalls attached to the Firewall Policy."]
     #[serde(rename = "enableProxy", default, skip_serializing_if = "Option::is_none")]
@@ -7000,7 +7759,11 @@ impl DscpConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscpConfigurationListResult {
     #[doc = "A list of dscp configurations in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscpConfiguration>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7021,31 +7784,65 @@ impl DscpConfigurationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscpConfigurationPropertiesFormat {
     #[doc = "List of markings to be used in the configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub markings: Vec<i32>,
     #[doc = "Source IP ranges."]
-    #[serde(rename = "sourceIpRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_ranges: Vec<QosIpRange>,
     #[doc = "Destination IP ranges."]
-    #[serde(rename = "destinationIpRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationIpRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ip_ranges: Vec<QosIpRange>,
     #[doc = "Sources port ranges."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<QosPortRange>,
     #[doc = "Destination port ranges."]
-    #[serde(rename = "destinationPortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_port_ranges: Vec<QosPortRange>,
     #[doc = "RNM supported protocol types."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub protocol: Option<dscp_configuration_properties_format::Protocol>,
     #[doc = "QoS object definitions"]
-    #[serde(rename = "qosDefinitionCollection", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "qosDefinitionCollection",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub qos_definition_collection: Vec<QosDefinition>,
     #[doc = "Qos Collection ID generated by RNM."]
     #[serde(rename = "qosCollectionId", default, skip_serializing_if = "Option::is_none")]
     pub qos_collection_id: Option<String>,
     #[doc = "Associated Network Interfaces to the DSCP Configuration."]
-    #[serde(rename = "associatedNetworkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "associatedNetworkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub associated_network_interfaces: Vec<NetworkInterface>,
     #[doc = "The resource GUID property of the DSCP Configuration resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -7123,7 +7920,12 @@ pub struct EffectiveNetworkSecurityGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub association: Option<EffectiveNetworkSecurityGroupAssociation>,
     #[doc = "A collection of effective security rules."]
-    #[serde(rename = "effectiveSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_security_rules: Vec<EffectiveNetworkSecurityRule>,
     #[doc = "Mapping of tags to list of IP Addresses included within the tag."]
     #[serde(rename = "tagMap", default, skip_serializing_if = "Option::is_none")]
@@ -7156,7 +7958,11 @@ impl EffectiveNetworkSecurityGroupAssociation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EffectiveNetworkSecurityGroupListResult {
     #[doc = "A list of effective network security groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EffectiveNetworkSecurityGroup>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7183,10 +7989,20 @@ pub struct EffectiveNetworkSecurityRule {
     #[serde(rename = "destinationPortRange", default, skip_serializing_if = "Option::is_none")]
     pub destination_port_range: Option<String>,
     #[doc = "The source port ranges. Expected values include a single integer between 0 and 65535, a range using '-' as separator (e.g. 100-400), or an asterisk (*)."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
     #[doc = "The destination port ranges. Expected values include a single integer between 0 and 65535, a range using '-' as separator (e.g. 100-400), or an asterisk (*)."]
-    #[serde(rename = "destinationPortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_port_ranges: Vec<String>,
     #[doc = "The source address prefix."]
     #[serde(rename = "sourceAddressPrefix", default, skip_serializing_if = "Option::is_none")]
@@ -7195,16 +8011,36 @@ pub struct EffectiveNetworkSecurityRule {
     #[serde(rename = "destinationAddressPrefix", default, skip_serializing_if = "Option::is_none")]
     pub destination_address_prefix: Option<String>,
     #[doc = "The source address prefixes. Expected values include CIDR IP ranges, Default Tags (VirtualNetwork, AzureLoadBalancer, Internet), System Tags, and the asterisk (*)."]
-    #[serde(rename = "sourceAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_address_prefixes: Vec<String>,
     #[doc = "The destination address prefixes. Expected values include CIDR IP ranges, Default Tags (VirtualNetwork, AzureLoadBalancer, Internet), System Tags, and the asterisk (*)."]
-    #[serde(rename = "destinationAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_address_prefixes: Vec<String>,
     #[doc = "The expanded source address prefix."]
-    #[serde(rename = "expandedSourceAddressPrefix", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "expandedSourceAddressPrefix",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub expanded_source_address_prefix: Vec<String>,
     #[doc = "Expanded destination address prefix."]
-    #[serde(rename = "expandedDestinationAddressPrefix", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "expandedDestinationAddressPrefix",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub expanded_destination_address_prefix: Vec<String>,
     #[doc = "Whether network traffic is allowed or denied."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7279,10 +8115,20 @@ pub struct EffectiveRoute {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<effective_route::State>,
     #[doc = "The address prefixes of the effective routes in CIDR notation."]
-    #[serde(rename = "addressPrefix", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefix",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefix: Vec<String>,
     #[doc = "The IP address of the next hop of the effective route."]
-    #[serde(rename = "nextHopIpAddress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nextHopIpAddress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub next_hop_ip_address: Vec<String>,
     #[doc = "The type of Azure hop the packet should be sent to."]
     #[serde(rename = "nextHopType", default, skip_serializing_if = "Option::is_none")]
@@ -7378,7 +8224,11 @@ pub mod effective_route {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EffectiveRouteListResult {
     #[doc = "A list of effective routes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EffectiveRoute>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7425,7 +8275,11 @@ impl EndpointServiceResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EndpointServicesListResult {
     #[doc = "List of available endpoint services in a region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EndpointServiceResult>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7455,7 +8309,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetails>,
     #[doc = "Inner error message."]
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
@@ -7521,7 +8379,12 @@ pub struct EvaluatedNetworkSecurityGroup {
     #[serde(rename = "matchedRule", default, skip_serializing_if = "Option::is_none")]
     pub matched_rule: Option<MatchedRule>,
     #[doc = "List of network security rules evaluation results."]
-    #[serde(rename = "rulesEvaluationResult", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rulesEvaluationResult",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules_evaluation_result: Vec<NetworkSecurityRulesEvaluationResult>,
 }
 impl EvaluatedNetworkSecurityGroup {
@@ -7548,7 +8411,11 @@ pub struct ExclusionManagedRuleGroup {
     #[serde(rename = "ruleGroupName")]
     pub rule_group_name: String,
     #[doc = "List of rules that will be excluded. If none specified, all rules in the group will be excluded."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ExclusionManagedRule>,
 }
 impl ExclusionManagedRuleGroup {
@@ -7569,7 +8436,12 @@ pub struct ExclusionManagedRuleSet {
     #[serde(rename = "ruleSetVersion")]
     pub rule_set_version: String,
     #[doc = "Defines the rule groups to apply to the rule set."]
-    #[serde(rename = "ruleGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_groups: Vec<ExclusionManagedRuleGroup>,
 }
 impl ExclusionManagedRuleSet {
@@ -7696,7 +8568,11 @@ impl ExpressRouteCircuitConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCircuitConnectionListResult {
     #[doc = "The global reach connection associated with Private Peering in an ExpressRoute Circuit."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCircuitConnection>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7747,7 +8623,11 @@ impl ExpressRouteCircuitConnectionPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCircuitListResult {
     #[doc = "A list of ExpressRouteCircuits in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCircuit>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7791,10 +8671,20 @@ impl ExpressRouteCircuitPeering {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCircuitPeeringConfig {
     #[doc = "The reference to AdvertisedPublicPrefixes."]
-    #[serde(rename = "advertisedPublicPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "advertisedPublicPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub advertised_public_prefixes: Vec<String>,
     #[doc = "The communities of bgp peering. Specified for microsoft peering."]
-    #[serde(rename = "advertisedCommunities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "advertisedCommunities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub advertised_communities: Vec<String>,
     #[doc = "The advertised public prefix state of the Peering resource."]
     #[serde(rename = "advertisedPublicPrefixesState", default, skip_serializing_if = "Option::is_none")]
@@ -7874,7 +8764,11 @@ impl ExpressRouteCircuitPeeringId {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCircuitPeeringListResult {
     #[doc = "The peerings in an express route circuit."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCircuitPeering>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7949,10 +8843,19 @@ pub struct ExpressRouteCircuitPeeringPropertiesFormat {
     #[serde(rename = "expressRouteConnection", default, skip_serializing_if = "Option::is_none")]
     pub express_route_connection: Option<ExpressRouteConnectionId>,
     #[doc = "The list of circuit connections associated with Azure Private Peering for this circuit."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connections: Vec<ExpressRouteCircuitConnection>,
     #[doc = "The list of peered circuit connections associated with Azure Private Peering for this circuit."]
-    #[serde(rename = "peeredConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeredConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peered_connections: Vec<PeerExpressRouteCircuitConnection>,
 }
 impl ExpressRouteCircuitPeeringPropertiesFormat {
@@ -7973,10 +8876,18 @@ pub struct ExpressRouteCircuitPropertiesFormat {
     #[serde(rename = "serviceProviderProvisioningState", default, skip_serializing_if = "Option::is_none")]
     pub service_provider_provisioning_state: Option<ServiceProviderProvisioningState>,
     #[doc = "The list of authorizations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<ExpressRouteCircuitAuthorization>,
     #[doc = "The list of peerings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peerings: Vec<ExpressRouteCircuitPeering>,
     #[doc = "The ServiceKey."]
     #[serde(rename = "serviceKey", default, skip_serializing_if = "Option::is_none")]
@@ -8213,7 +9124,11 @@ impl ExpressRouteCircuitStats {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCircuitsArpTableListResult {
     #[doc = "A list of the ARP tables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCircuitArpTable>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8228,7 +9143,11 @@ impl ExpressRouteCircuitsArpTableListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCircuitsRoutesTableListResult {
     #[doc = "The list of routes table."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCircuitRoutesTable>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8243,7 +9162,11 @@ impl ExpressRouteCircuitsRoutesTableListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCircuitsRoutesTableSummaryListResult {
     #[doc = "A list of the routes table."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCircuitRoutesTableSummary>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8290,7 +9213,11 @@ impl ExpressRouteConnectionId {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteConnectionList {
     #[doc = "The list of ExpressRoute connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteConnection>,
 }
 impl ExpressRouteConnectionList {
@@ -8357,7 +9284,11 @@ impl ExpressRouteCrossConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCrossConnectionListResult {
     #[doc = "A list of ExpressRouteCrossConnection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCrossConnection>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8398,7 +9329,11 @@ impl ExpressRouteCrossConnectionPeering {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCrossConnectionPeeringList {
     #[doc = "The peerings in an express route cross connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCrossConnectionPeering>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8500,7 +9435,11 @@ pub struct ExpressRouteCrossConnectionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "The list of peerings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peerings: Vec<ExpressRouteCrossConnectionPeering>,
 }
 impl ExpressRouteCrossConnectionProperties {
@@ -8533,7 +9472,11 @@ impl ExpressRouteCrossConnectionRoutesTableSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCrossConnectionsRoutesTableSummaryListResult {
     #[doc = "A list of the routes table."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCrossConnectionRoutesTableSummary>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8565,7 +9508,11 @@ impl ExpressRouteGateway {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteGatewayList {
     #[doc = "List of ExpressRoute gateways."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteGateway>,
 }
 impl ExpressRouteGatewayList {
@@ -8580,7 +9527,12 @@ pub struct ExpressRouteGatewayProperties {
     #[serde(rename = "autoScaleConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub auto_scale_configuration: Option<express_route_gateway_properties::AutoScaleConfiguration>,
     #[doc = "List of ExpressRoute connections to the ExpressRoute gateway."]
-    #[serde(rename = "expressRouteConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "expressRouteConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub express_route_connections: Vec<ExpressRouteConnection>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -8656,7 +9608,11 @@ impl ExpressRouteLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteLinkListResult {
     #[doc = "The list of ExpressRouteLink sub-resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteLink>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8987,7 +9943,11 @@ impl ExpressRoutePort {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRoutePortListResult {
     #[doc = "A list of ExpressRoutePort resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRoutePort>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9029,10 +9989,18 @@ pub struct ExpressRoutePortPropertiesFormat {
     #[serde(rename = "allocationDate", default, skip_serializing_if = "Option::is_none")]
     pub allocation_date: Option<String>,
     #[doc = "The set of physical links of the ExpressRoutePort resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<ExpressRouteLink>,
     #[doc = "Reference the ExpressRoute circuit(s) that are provisioned on this ExpressRoutePort resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub circuits: Vec<SubResource>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -9119,7 +10087,11 @@ impl ExpressRoutePortsLocationBandwidths {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRoutePortsLocationListResult {
     #[doc = "The list of all ExpressRoutePort peering locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRoutePortsLocation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9146,7 +10118,12 @@ pub struct ExpressRoutePortsLocationPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub contact: Option<String>,
     #[doc = "The inventory of available ExpressRoutePort bandwidths."]
-    #[serde(rename = "availableBandwidths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableBandwidths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_bandwidths: Vec<ExpressRoutePortsLocationBandwidths>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -9190,7 +10167,11 @@ impl ExpressRouteServiceProviderBandwidthsOffered {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteServiceProviderListResult {
     #[doc = "A list of ExpressRouteResourceProvider resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteServiceProvider>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9211,10 +10192,20 @@ impl ExpressRouteServiceProviderListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteServiceProviderPropertiesFormat {
     #[doc = "A list of peering locations."]
-    #[serde(rename = "peeringLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeringLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peering_locations: Vec<String>,
     #[doc = "A list of bandwidths offered."]
-    #[serde(rename = "bandwidthsOffered", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bandwidthsOffered",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bandwidths_offered: Vec<ExpressRouteServiceProviderBandwidthsOffered>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -9282,7 +10273,11 @@ pub struct FilterItems {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub field: Option<String>,
     #[doc = "List of values to filter the current field by"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl FilterItems {
@@ -9335,7 +10330,11 @@ pub struct FirewallPolicyFilterRuleCollection {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<FirewallPolicyFilterRuleCollectionAction>,
     #[doc = "List of rules included in a rule collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<FirewallPolicyRule>,
 }
 impl FirewallPolicyFilterRuleCollection {
@@ -9487,19 +10486,44 @@ pub struct FirewallPolicyIntrusionDetectionBypassTrafficSpecifications {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub protocol: Option<FirewallPolicyIntrusionDetectionBypassTrafficProtocol>,
     #[doc = "List of source IP addresses or ranges for this rule."]
-    #[serde(rename = "sourceAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_addresses: Vec<String>,
     #[doc = "List of destination IP addresses or ranges for this rule."]
-    #[serde(rename = "destinationAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_addresses: Vec<String>,
     #[doc = "List of destination ports or ranges."]
-    #[serde(rename = "destinationPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ports: Vec<String>,
     #[doc = "List of source IpGroups for this rule."]
-    #[serde(rename = "sourceIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_groups: Vec<String>,
     #[doc = "List of destination IpGroups for this rule."]
-    #[serde(rename = "destinationIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ip_groups: Vec<String>,
 }
 impl FirewallPolicyIntrusionDetectionBypassTrafficSpecifications {
@@ -9511,10 +10535,20 @@ impl FirewallPolicyIntrusionDetectionBypassTrafficSpecifications {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallPolicyIntrusionDetectionConfiguration {
     #[doc = "List of specific signatures states."]
-    #[serde(rename = "signatureOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "signatureOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub signature_overrides: Vec<FirewallPolicyIntrusionDetectionSignatureSpecification>,
     #[doc = "List of rules for traffic to bypass."]
-    #[serde(rename = "bypassTrafficSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bypassTrafficSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bypass_traffic_settings: Vec<FirewallPolicyIntrusionDetectionBypassTrafficSpecifications>,
 }
 impl FirewallPolicyIntrusionDetectionConfiguration {
@@ -9580,7 +10614,11 @@ impl Serialize for FirewallPolicyIntrusionDetectionStateOptions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallPolicyListResult {
     #[doc = "List of Firewall Policies in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallPolicy>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9601,7 +10639,11 @@ impl FirewallPolicyListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallPolicyLogAnalyticsResources {
     #[doc = "List of workspaces for Firewall Policy Insights."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub workspaces: Vec<FirewallPolicyLogAnalyticsWorkspace>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "defaultWorkspaceId", default, skip_serializing_if = "Option::is_none")]
@@ -9636,7 +10678,11 @@ pub struct FirewallPolicyNatRuleCollection {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<FirewallPolicyNatRuleCollectionAction>,
     #[doc = "List of rules included in a rule collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<FirewallPolicyRule>,
 }
 impl FirewallPolicyNatRuleCollection {
@@ -9700,7 +10746,12 @@ impl Serialize for FirewallPolicyNatRuleCollectionActionType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallPolicyPropertiesFormat {
     #[doc = "List of references to FirewallPolicyRuleCollectionGroups."]
-    #[serde(rename = "ruleCollectionGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleCollectionGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_collection_groups: Vec<SubResource>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -9709,10 +10760,19 @@ pub struct FirewallPolicyPropertiesFormat {
     #[serde(rename = "basePolicy", default, skip_serializing_if = "Option::is_none")]
     pub base_policy: Option<SubResource>,
     #[doc = "List of references to Azure Firewalls that this Firewall Policy is associated with."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewalls: Vec<SubResource>,
     #[doc = "List of references to Child Firewall Policies."]
-    #[serde(rename = "childPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_policies: Vec<SubResource>,
     #[doc = "The operation mode for Threat Intel."]
     #[serde(rename = "threatIntelMode", default, skip_serializing_if = "Option::is_none")]
@@ -9959,7 +11019,11 @@ impl FirewallPolicyRuleCollectionGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallPolicyRuleCollectionGroupListResult {
     #[doc = "List of FirewallPolicyRuleCollectionGroups in a FirewallPolicy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallPolicyRuleCollectionGroup>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9983,7 +11047,12 @@ pub struct FirewallPolicyRuleCollectionGroupProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub priority: Option<i32>,
     #[doc = "Group of Firewall Policy rule collections."]
-    #[serde(rename = "ruleCollections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleCollections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_collections: Vec<FirewallPolicyRuleCollection>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -10042,7 +11111,12 @@ impl Serialize for FirewallPolicyRuleNetworkProtocol {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallPolicySnat {
     #[doc = "List of private IP addresses/IP address ranges to not be SNAT."]
-    #[serde(rename = "privateRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ranges: Vec<String>,
 }
 impl FirewallPolicySnat {
@@ -10120,10 +11194,19 @@ pub mod firewall_policy_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallPolicyThreatIntelWhitelist {
     #[doc = "List of IP addresses for the ThreatIntel Whitelist."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "List of FQDNs for the ThreatIntel Whitelist."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdns: Vec<String>,
 }
 impl FirewallPolicyThreatIntelWhitelist {
@@ -10239,7 +11322,11 @@ impl FlowLogInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FlowLogListResult {
     #[doc = "Information about flow log resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FlowLog>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10353,7 +11440,11 @@ pub struct FrontendIpConfiguration {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "A list of availability zones denoting the IP allocated for the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl FrontendIpConfiguration {
@@ -10365,16 +11456,36 @@ impl FrontendIpConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FrontendIpConfigurationPropertiesFormat {
     #[doc = "An array of references to inbound rules that use this frontend IP."]
-    #[serde(rename = "inboundNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_rules: Vec<SubResource>,
     #[doc = "An array of references to inbound pools that use this frontend IP."]
-    #[serde(rename = "inboundNatPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_pools: Vec<SubResource>,
     #[doc = "An array of references to outbound rules that use this frontend IP."]
-    #[serde(rename = "outboundRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outboundRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outbound_rules: Vec<SubResource>,
     #[doc = "An array of references to load balancing rules that use this frontend IP."]
-    #[serde(rename = "loadBalancingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_rules: Vec<SubResource>,
     #[doc = "The private IP address of the IP configuration."]
     #[serde(rename = "privateIPAddress", default, skip_serializing_if = "Option::is_none")]
@@ -10543,7 +11654,11 @@ impl GatewayRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayRouteListResult {
     #[doc = "List of gateway routes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayRoute>,
 }
 impl GatewayRouteListResult {
@@ -10579,7 +11694,12 @@ impl GenerateExpressRoutePortsLoaResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct GetVpnSitesConfigurationRequest {
     #[doc = "List of resource-ids of the vpn-sites for which config is to be downloaded."]
-    #[serde(rename = "vpnSites", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnSites",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_sites: Vec<String>,
     #[doc = "The sas-url to download the configurations for vpn-sites."]
     #[serde(rename = "outputBlobSasUrl")]
@@ -10600,10 +11720,19 @@ pub struct HttpConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub method: Option<http_configuration::Method>,
     #[doc = "List of HTTP headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<HttpHeader>,
     #[doc = "Valid status codes."]
-    #[serde(rename = "validStatusCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validStatusCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub valid_status_codes: Vec<i32>,
 }
 impl HttpConfiguration {
@@ -10677,7 +11806,11 @@ pub struct HopLink {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<HopLinkProperties>,
     #[doc = "List of issues."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issues: Vec<ConnectivityIssue>,
     #[doc = "Provides additional context on links."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10775,7 +11908,11 @@ impl HubIpConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HubPublicIpAddresses {
     #[doc = "The list of Public IP addresses associated with azure firewall or IP addresses to be retained."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub addresses: Vec<AzureFirewallPublicIpAddress>,
     #[doc = "The number of Public IP addresses associated with azure firewall."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10841,16 +11978,34 @@ impl HubRouteTable {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HubRouteTableProperties {
     #[doc = "List of all routes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<HubRoute>,
     #[doc = "List of labels associated with this route table."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "List of all connections associated with this route table."]
-    #[serde(rename = "associatedConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "associatedConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub associated_connections: Vec<String>,
     #[doc = "List of all connections that advertise to this route table."]
-    #[serde(rename = "propagatingConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propagatingConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub propagating_connections: Vec<String>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -10980,7 +12135,12 @@ pub struct IpAddressAvailabilityResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub available: Option<bool>,
     #[doc = "Contains other available private IP addresses if the asked for address is taken."]
-    #[serde(rename = "availableIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_ip_addresses: Vec<String>,
     #[doc = "Private IP address platform reserved."]
     #[serde(rename = "isPlatformReserved", default, skip_serializing_if = "Option::is_none")]
@@ -11055,13 +12215,28 @@ pub struct IpConfigurationBgpPeeringAddress {
     #[serde(rename = "ipconfigurationId", default, skip_serializing_if = "Option::is_none")]
     pub ipconfiguration_id: Option<String>,
     #[doc = "The list of default BGP peering addresses which belong to IP configuration."]
-    #[serde(rename = "defaultBgpIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultBgpIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_bgp_ip_addresses: Vec<String>,
     #[doc = "The list of custom BGP peering addresses which belong to IP configuration."]
-    #[serde(rename = "customBgpIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customBgpIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_bgp_ip_addresses: Vec<String>,
     #[doc = "The list of tunnel public IP addresses which belong to IP configuration."]
-    #[serde(rename = "tunnelIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tunnelIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tunnel_ip_addresses: Vec<String>,
 }
 impl IpConfigurationBgpPeeringAddress {
@@ -11368,7 +12543,11 @@ impl InboundNatRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InboundNatRuleListResult {
     #[doc = "A list of inbound NAT rules in a load balancer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InboundNatRule>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11478,7 +12657,11 @@ impl InboundSecurityRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InboundSecurityRuleProperties {
     #[doc = "List of allowed rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<InboundSecurityRules>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -11570,7 +12753,11 @@ impl IpAllocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IpAllocationListResult {
     #[doc = "A list of IpAllocation resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IpAllocation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11678,7 +12865,11 @@ impl IpGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IpGroupListResult {
     #[doc = "The list of IpGroups information resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IpGroup>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11702,13 +12893,27 @@ pub struct IpGroupPropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "IpAddresses/IpAddressPrefixes in the IpGroups resource."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "List of references to Firewall resources that this IpGroups is associated with."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewalls: Vec<SubResource>,
     #[doc = "List of references to Firewall Policies resources that this IpGroups is associated with."]
-    #[serde(rename = "firewallPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_policies: Vec<SubResource>,
 }
 impl IpGroupPropertiesFormat {
@@ -11984,7 +13189,11 @@ impl IssueContext {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListHubRouteTablesResult {
     #[doc = "List of RouteTables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HubRouteTable>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12005,7 +13214,11 @@ impl ListHubRouteTablesResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListHubVirtualNetworkConnectionsResult {
     #[doc = "List of HubVirtualNetworkConnections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HubVirtualNetworkConnection>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12026,7 +13239,11 @@ impl ListHubVirtualNetworkConnectionsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListP2sVpnGatewaysResult {
     #[doc = "List of P2SVpnGateways."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<P2sVpnGateway>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12047,7 +13264,11 @@ impl ListP2sVpnGatewaysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListRoutingIntentResult {
     #[doc = "List of RoutingIntent resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoutingIntent>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12068,7 +13289,11 @@ impl ListRoutingIntentResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVirtualHubBgpConnectionResults {
     #[doc = "The list of VirtualHubBgpConnections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BgpConnection>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12089,7 +13314,11 @@ impl ListVirtualHubBgpConnectionResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVirtualHubIpConfigurationResults {
     #[doc = "The list of VirtualHubIpConfigurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HubIpConfiguration>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12110,7 +13339,11 @@ impl ListVirtualHubIpConfigurationResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVirtualHubRouteTableV2sResult {
     #[doc = "List of VirtualHubRouteTableV2s."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualHubRouteTableV2>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12131,7 +13364,11 @@ impl ListVirtualHubRouteTableV2sResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVirtualHubsResult {
     #[doc = "List of VirtualHubs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualHub>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12152,7 +13389,11 @@ impl ListVirtualHubsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVirtualNetworkGatewayNatRulesResult {
     #[doc = "List of Nat Rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkGatewayNatRule>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12173,7 +13414,11 @@ impl ListVirtualNetworkGatewayNatRulesResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVirtualWaNsResult {
     #[doc = "List of VirtualWANs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualWan>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12194,7 +13439,11 @@ impl ListVirtualWaNsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVpnConnectionsResult {
     #[doc = "List of Vpn Connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnConnection>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12215,7 +13464,11 @@ impl ListVpnConnectionsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVpnGatewayNatRulesResult {
     #[doc = "List of Nat Rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnGatewayNatRule>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12236,7 +13489,11 @@ impl ListVpnGatewayNatRulesResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVpnGatewaysResult {
     #[doc = "List of VpnGateways."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnGateway>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12257,7 +13514,11 @@ impl ListVpnGatewaysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVpnServerConfigurationsResult {
     #[doc = "List of VpnServerConfigurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnServerConfiguration>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12278,7 +13539,11 @@ impl ListVpnServerConfigurationsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVpnSiteLinkConnectionsResult {
     #[doc = "List of VpnSiteLinkConnections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnSiteLinkConnection>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12299,7 +13564,11 @@ impl ListVpnSiteLinkConnectionsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVpnSiteLinksResult {
     #[doc = "List of VpnSitesLinks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnSiteLink>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12320,7 +13589,11 @@ impl ListVpnSiteLinksResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVpnSitesResult {
     #[doc = "List of VpnSites."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnSite>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12379,7 +13652,11 @@ impl LoadBalancerBackendAddress {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancerBackendAddressPoolListResult {
     #[doc = "A list of backend address pools in a load balancer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackendAddressPool>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12415,7 +13692,12 @@ pub struct LoadBalancerBackendAddressPropertiesFormat {
     #[serde(rename = "loadBalancerFrontendIPConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub load_balancer_frontend_ip_configuration: Option<SubResource>,
     #[doc = "Collection of inbound NAT rule port mappings."]
-    #[serde(rename = "inboundNatRulesPortMapping", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatRulesPortMapping",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_rules_port_mapping: Vec<NatRulePortMapping>,
 }
 impl LoadBalancerBackendAddressPropertiesFormat {
@@ -12427,7 +13709,11 @@ impl LoadBalancerBackendAddressPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancerFrontendIpConfigurationListResult {
     #[doc = "A list of frontend IP configurations in a load balancer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FrontendIpConfiguration>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12448,7 +13734,11 @@ impl LoadBalancerFrontendIpConfigurationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancerListResult {
     #[doc = "A list of load balancers in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoadBalancer>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12469,7 +13759,11 @@ impl LoadBalancerListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancerLoadBalancingRuleListResult {
     #[doc = "A list of load balancing rules in a load balancer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoadBalancingRule>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12490,7 +13784,11 @@ impl LoadBalancerLoadBalancingRuleListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancerOutboundRuleListResult {
     #[doc = "A list of outbound rules in a load balancer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OutboundRule>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12511,7 +13809,11 @@ impl LoadBalancerOutboundRuleListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancerProbeListResult {
     #[doc = "A list of probes in a load balancer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Probe>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12532,25 +13834,59 @@ impl LoadBalancerProbeListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancerPropertiesFormat {
     #[doc = "Object representing the frontend IPs to be used for the load balancer."]
-    #[serde(rename = "frontendIPConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendIPConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_ip_configurations: Vec<FrontendIpConfiguration>,
     #[doc = "Collection of backend address pools used by a load balancer."]
-    #[serde(rename = "backendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_address_pools: Vec<BackendAddressPool>,
     #[doc = "Object collection representing the load balancing rules Gets the provisioning."]
-    #[serde(rename = "loadBalancingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_rules: Vec<LoadBalancingRule>,
     #[doc = "Collection of probe objects used in the load balancer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub probes: Vec<Probe>,
     #[doc = "Collection of inbound NAT Rules used by a load balancer. Defining inbound NAT rules on your load balancer is mutually exclusive with defining an inbound NAT pool. Inbound NAT pools are referenced from virtual machine scale sets. NICs that are associated with individual virtual machines cannot reference an Inbound NAT pool. They have to reference individual inbound NAT rules."]
-    #[serde(rename = "inboundNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_rules: Vec<InboundNatRule>,
     #[doc = "Defines an external port range for inbound NAT to a single backend port on NICs associated with a load balancer. Inbound NAT rules are created automatically for each NIC associated with the Load Balancer using an external port from this range. Defining an Inbound NAT pool on your Load Balancer is mutually exclusive with defining inbound NAT rules. Inbound NAT pools are referenced from virtual machine scale sets. NICs that are associated with individual virtual machines cannot reference an inbound NAT pool. They have to reference individual inbound NAT rules."]
-    #[serde(rename = "inboundNatPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_pools: Vec<InboundNatPool>,
     #[doc = "The outbound rules."]
-    #[serde(rename = "outboundRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outboundRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outbound_rules: Vec<OutboundRule>,
     #[doc = "The resource GUID property of the load balancer resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -12662,7 +13998,12 @@ pub mod load_balancer_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancerVipSwapRequest {
     #[doc = "A list of frontend IP configuration resources that should swap VIPs."]
-    #[serde(rename = "frontendIPConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendIPConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_ip_configurations: Vec<LoadBalancerVipSwapRequestFrontendIpConfiguration>,
 }
 impl LoadBalancerVipSwapRequest {
@@ -12730,7 +14071,12 @@ pub struct LoadBalancingRulePropertiesFormat {
     #[serde(rename = "backendAddressPool", default, skip_serializing_if = "Option::is_none")]
     pub backend_address_pool: Option<SubResource>,
     #[doc = "An array of references to pool of DIPs."]
-    #[serde(rename = "backendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_address_pools: Vec<SubResource>,
     #[doc = "Reference to another subresource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -12849,7 +14195,11 @@ impl LocalNetworkGateway {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocalNetworkGatewayListResult {
     #[doc = "A list of local network gateways that exists in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LocalNetworkGateway>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12918,7 +14268,11 @@ pub struct ManagedRuleGroupOverride {
     #[serde(rename = "ruleGroupName")]
     pub rule_group_name: String,
     #[doc = "List of rules that will be disabled. If none specified, all rules in the group will be disabled."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleOverride>,
 }
 impl ManagedRuleGroupOverride {
@@ -12992,7 +14346,12 @@ pub struct ManagedRuleSet {
     #[serde(rename = "ruleSetVersion")]
     pub rule_set_version: String,
     #[doc = "Defines the rule group overrides to apply to the rule set."]
-    #[serde(rename = "ruleGroupOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroupOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_group_overrides: Vec<ManagedRuleGroupOverride>,
 }
 impl ManagedRuleSet {
@@ -13008,7 +14367,11 @@ impl ManagedRuleSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ManagedRulesDefinition {
     #[doc = "The Exclusions that are applied on the policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<OwaspCrsExclusionEntry>,
     #[doc = "The managed rule sets that are associated with the policy."]
     #[serde(rename = "managedRuleSets")]
@@ -13070,7 +14433,11 @@ pub struct MatchCondition {
     #[serde(rename = "matchValues")]
     pub match_values: Vec<String>,
     #[doc = "List of transforms."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl MatchCondition {
@@ -13247,7 +14614,11 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "List of availability."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<Availability>,
     #[doc = "Whether regional MDM account enabled."]
     #[serde(rename = "enableRegionalMdmAccount", default, skip_serializing_if = "Option::is_none")]
@@ -13259,7 +14630,11 @@ pub struct MetricSpecification {
     #[serde(rename = "metricFilterPattern", default, skip_serializing_if = "Option::is_none")]
     pub metric_filter_pattern: Option<String>,
     #[doc = "List of dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Whether the metric is internal."]
     #[serde(rename = "isInternal", default, skip_serializing_if = "Option::is_none")]
@@ -13291,7 +14666,11 @@ pub struct NatGateway {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<NatGatewayPropertiesFormat>,
     #[doc = "A list of availability zones denoting the zone in which Nat Gateway should be deployed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "A unique read-only string that changes whenever the resource is updated."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -13306,7 +14685,11 @@ impl NatGateway {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NatGatewayListResult {
     #[doc = "A list of Nat Gateways that exists in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NatGateway>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13330,13 +14713,27 @@ pub struct NatGatewayPropertiesFormat {
     #[serde(rename = "idleTimeoutInMinutes", default, skip_serializing_if = "Option::is_none")]
     pub idle_timeout_in_minutes: Option<i32>,
     #[doc = "An array of public ip addresses associated with the nat gateway resource."]
-    #[serde(rename = "publicIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<SubResource>,
     #[doc = "An array of public ip prefixes associated with the nat gateway resource."]
-    #[serde(rename = "publicIpPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIpPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_prefixes: Vec<SubResource>,
     #[doc = "An array of references to the subnets using this nat gateway resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<SubResource>,
     #[doc = "The resource GUID property of the NAT gateway resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -13406,16 +14803,36 @@ pub struct NatRule {
     #[serde(flatten)]
     pub firewall_policy_rule: FirewallPolicyRule,
     #[doc = "Array of FirewallPolicyRuleNetworkProtocols."]
-    #[serde(rename = "ipProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_protocols: Vec<FirewallPolicyRuleNetworkProtocol>,
     #[doc = "List of source IP addresses for this rule."]
-    #[serde(rename = "sourceAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_addresses: Vec<String>,
     #[doc = "List of destination IP addresses or Service Tags."]
-    #[serde(rename = "destinationAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_addresses: Vec<String>,
     #[doc = "List of destination ports."]
-    #[serde(rename = "destinationPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ports: Vec<String>,
     #[doc = "The translated address for this NAT rule."]
     #[serde(rename = "translatedAddress", default, skip_serializing_if = "Option::is_none")]
@@ -13424,7 +14841,12 @@ pub struct NatRule {
     #[serde(rename = "translatedPort", default, skip_serializing_if = "Option::is_none")]
     pub translated_port: Option<String>,
     #[doc = "List of source IpGroups for this rule."]
-    #[serde(rename = "sourceIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_groups: Vec<String>,
     #[doc = "The translated FQDN for this NAT rule."]
     #[serde(rename = "translatedFqdn", default, skip_serializing_if = "Option::is_none")]
@@ -13556,7 +14978,11 @@ impl NetworkConfigurationDiagnosticProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkConfigurationDiagnosticResponse {
     #[doc = "List of network configuration diagnostic results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub results: Vec<NetworkConfigurationDiagnosticResult>,
 }
 impl NetworkConfigurationDiagnosticResponse {
@@ -13635,7 +15061,12 @@ pub struct NetworkInterfaceAssociation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Collection of custom security rules."]
-    #[serde(rename = "securityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_rules: Vec<SecurityRule>,
 }
 impl NetworkInterfaceAssociation {
@@ -13647,10 +15078,20 @@ impl NetworkInterfaceAssociation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkInterfaceDnsSettings {
     #[doc = "List of DNS servers IP addresses. Use 'AzureProvidedDNS' to switch to azure provided DNS resolution. 'AzureProvidedDNS' value cannot be combined with other IPs, it must be the only value in dnsServers collection."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
     #[doc = "If the VM that uses this NIC is part of an Availability Set, then this list will have the union of all DNS servers from all NICs that are part of the Availability Set. This property is what is configured on each of those VMs."]
-    #[serde(rename = "appliedDnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appliedDnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applied_dns_servers: Vec<String>,
     #[doc = "Relative DNS name for this NIC used for internal communications between VMs in the same virtual network."]
     #[serde(rename = "internalDnsNameLabel", default, skip_serializing_if = "Option::is_none")]
@@ -13694,7 +15135,11 @@ impl NetworkInterfaceIpConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkInterfaceIpConfigurationListResult {
     #[doc = "A list of ip configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkInterfaceIpConfiguration>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13721,7 +15166,11 @@ pub struct NetworkInterfaceIpConfigurationPrivateLinkConnectionProperties {
     #[serde(rename = "requiredMemberName", default, skip_serializing_if = "Option::is_none")]
     pub required_member_name: Option<String>,
     #[doc = "List of FQDNs for current private link connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdns: Vec<String>,
 }
 impl NetworkInterfaceIpConfigurationPrivateLinkConnectionProperties {
@@ -13736,16 +15185,36 @@ pub struct NetworkInterfaceIpConfigurationPropertiesFormat {
     #[serde(rename = "gatewayLoadBalancer", default, skip_serializing_if = "Option::is_none")]
     pub gateway_load_balancer: Option<SubResource>,
     #[doc = "The reference to Virtual Network Taps."]
-    #[serde(rename = "virtualNetworkTaps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkTaps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_taps: Vec<VirtualNetworkTap>,
     #[doc = "The reference to ApplicationGatewayBackendAddressPool resource."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<ApplicationGatewayBackendAddressPool>,
     #[doc = "The reference to LoadBalancerBackendAddressPool resource."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<BackendAddressPool>,
     #[doc = "A list of references of LoadBalancerInboundNatRules."]
-    #[serde(rename = "loadBalancerInboundNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerInboundNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_inbound_nat_rules: Vec<InboundNatRule>,
     #[doc = "Private IP address of the IP configuration."]
     #[serde(rename = "privateIPAddress", default, skip_serializing_if = "Option::is_none")]
@@ -13766,7 +15235,12 @@ pub struct NetworkInterfaceIpConfigurationPropertiesFormat {
     #[serde(rename = "publicIPAddress", default, skip_serializing_if = "Option::is_none")]
     pub public_ip_address: Option<PublicIpAddress>,
     #[doc = "Application security groups in which the IP configuration is included."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<ApplicationSecurityGroup>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -13784,7 +15258,11 @@ impl NetworkInterfaceIpConfigurationPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkInterfaceListResult {
     #[doc = "A list of network interfaces in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkInterface>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13805,7 +15283,11 @@ impl NetworkInterfaceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkInterfaceLoadBalancerListResult {
     #[doc = "A list of load balancers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoadBalancer>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13835,10 +15317,20 @@ pub struct NetworkInterfacePropertiesFormat {
     #[serde(rename = "privateEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub private_endpoint: Option<PrivateEndpoint>,
     #[doc = "A list of IPConfigurations of the network interface."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<NetworkInterfaceIpConfiguration>,
     #[doc = "A list of TapConfigurations of the network interface."]
-    #[serde(rename = "tapConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tapConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tap_configurations: Vec<NetworkInterfaceTapConfiguration>,
     #[doc = "DNS settings of a network interface."]
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
@@ -13859,7 +15351,12 @@ pub struct NetworkInterfacePropertiesFormat {
     #[serde(rename = "enableIPForwarding", default, skip_serializing_if = "Option::is_none")]
     pub enable_ip_forwarding: Option<bool>,
     #[doc = "A list of references to linked BareMetal resources."]
-    #[serde(rename = "hostedWorkloads", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostedWorkloads",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosted_workloads: Vec<String>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "dscpConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -13998,7 +15495,11 @@ impl NetworkInterfaceTapConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkInterfaceTapConfigurationListResult {
     #[doc = "A list of tap configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkInterfaceTapConfiguration>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14051,7 +15552,11 @@ impl NetworkProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfileListResult {
     #[doc = "A list of network profiles that exist in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkProfile>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14072,10 +15577,20 @@ impl NetworkProfileListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfilePropertiesFormat {
     #[doc = "List of child container network interfaces."]
-    #[serde(rename = "containerNetworkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerNetworkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_network_interfaces: Vec<ContainerNetworkInterface>,
     #[doc = "List of chid container network interface configurations."]
-    #[serde(rename = "containerNetworkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerNetworkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_network_interface_configurations: Vec<ContainerNetworkInterfaceConfiguration>,
     #[doc = "The resource GUID property of the network profile resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -14095,25 +15610,60 @@ pub struct NetworkRule {
     #[serde(flatten)]
     pub firewall_policy_rule: FirewallPolicyRule,
     #[doc = "Array of FirewallPolicyRuleNetworkProtocols."]
-    #[serde(rename = "ipProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_protocols: Vec<FirewallPolicyRuleNetworkProtocol>,
     #[doc = "List of source IP addresses for this rule."]
-    #[serde(rename = "sourceAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_addresses: Vec<String>,
     #[doc = "List of destination IP addresses or Service Tags."]
-    #[serde(rename = "destinationAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_addresses: Vec<String>,
     #[doc = "List of destination ports."]
-    #[serde(rename = "destinationPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ports: Vec<String>,
     #[doc = "List of source IpGroups for this rule."]
-    #[serde(rename = "sourceIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_groups: Vec<String>,
     #[doc = "List of destination IpGroups for this rule."]
-    #[serde(rename = "destinationIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ip_groups: Vec<String>,
     #[doc = "List of destination FQDNs."]
-    #[serde(rename = "destinationFqdns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationFqdns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_fqdns: Vec<String>,
 }
 impl NetworkRule {
@@ -14151,7 +15701,11 @@ impl NetworkSecurityGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkSecurityGroupListResult {
     #[doc = "A list of NetworkSecurityGroup resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkSecurityGroup>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14172,19 +15726,43 @@ impl NetworkSecurityGroupListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkSecurityGroupPropertiesFormat {
     #[doc = "A collection of security rules of the network security group."]
-    #[serde(rename = "securityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_rules: Vec<SecurityRule>,
     #[doc = "The default security rules of network security group."]
-    #[serde(rename = "defaultSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_security_rules: Vec<SecurityRule>,
     #[doc = "A collection of references to network interfaces."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
     #[doc = "A collection of references to subnets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<Subnet>,
     #[doc = "A collection of references to flow log resources."]
-    #[serde(rename = "flowLogs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "flowLogs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub flow_logs: Vec<FlowLog>,
     #[doc = "The resource GUID property of the network security group resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -14205,7 +15783,12 @@ pub struct NetworkSecurityGroupResult {
     #[serde(rename = "securityRuleAccessResult", default, skip_serializing_if = "Option::is_none")]
     pub security_rule_access_result: Option<SecurityRuleAccess>,
     #[doc = "List of results network security groups diagnostic."]
-    #[serde(rename = "evaluatedNetworkSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "evaluatedNetworkSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub evaluated_network_security_groups: Vec<EvaluatedNetworkSecurityGroup>,
 }
 impl NetworkSecurityGroupResult {
@@ -14264,7 +15847,11 @@ impl NetworkVirtualAppliance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkVirtualApplianceListResult {
     #[doc = "List of Network Virtual Appliances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkVirtualAppliance>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14291,13 +15878,23 @@ pub struct NetworkVirtualAppliancePropertiesFormat {
     #[serde(rename = "addressPrefix", default, skip_serializing_if = "Option::is_none")]
     pub address_prefix: Option<String>,
     #[doc = "BootStrapConfigurationBlobs storage URLs."]
-    #[serde(rename = "bootStrapConfigurationBlobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bootStrapConfigurationBlobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub boot_strap_configuration_blobs: Vec<String>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "virtualHub", default, skip_serializing_if = "Option::is_none")]
     pub virtual_hub: Option<SubResource>,
     #[doc = "CloudInitConfigurationBlob storage URLs."]
-    #[serde(rename = "cloudInitConfigurationBlobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cloudInitConfigurationBlobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cloud_init_configuration_blobs: Vec<String>,
     #[doc = "CloudInitConfiguration string in plain text."]
     #[serde(rename = "cloudInitConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -14309,13 +15906,28 @@ pub struct NetworkVirtualAppliancePropertiesFormat {
     #[serde(rename = "sshPublicKey", default, skip_serializing_if = "Option::is_none")]
     pub ssh_public_key: Option<String>,
     #[doc = "List of Virtual Appliance Network Interfaces."]
-    #[serde(rename = "virtualApplianceNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualApplianceNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_appliance_nics: Vec<VirtualApplianceNicProperties>,
     #[doc = "List of references to VirtualApplianceSite."]
-    #[serde(rename = "virtualApplianceSites", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualApplianceSites",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_appliance_sites: Vec<SubResource>,
     #[doc = "List of references to InboundSecurityRules."]
-    #[serde(rename = "inboundSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_security_rules: Vec<SubResource>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -14330,7 +15942,11 @@ impl NetworkVirtualAppliancePropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkVirtualApplianceSiteListResult {
     #[doc = "List of Network Virtual Appliance sites."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualApplianceSite>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14383,7 +15999,11 @@ impl NetworkVirtualApplianceSkuInstances {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkVirtualApplianceSkuListResult {
     #[doc = "List of Network Virtual Appliance Skus that are available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkVirtualApplianceSku>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14407,10 +16027,20 @@ pub struct NetworkVirtualApplianceSkuPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub vendor: Option<String>,
     #[doc = "Available Network Virtual Appliance versions."]
-    #[serde(rename = "availableVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_versions: Vec<String>,
     #[doc = "The list of scale units available."]
-    #[serde(rename = "availableScaleUnits", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableScaleUnits",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_scale_units: Vec<NetworkVirtualApplianceSkuInstances>,
 }
 impl NetworkVirtualApplianceSkuPropertiesFormat {
@@ -14439,7 +16069,11 @@ impl NetworkWatcher {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkWatcherListResult {
     #[doc = "List of network watcher resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkWatcher>,
 }
 impl azure_core::Continuable for NetworkWatcherListResult {
@@ -14689,7 +16323,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Network operations supported by the Network resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14724,10 +16362,20 @@ pub mod operation_properties_format {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ServiceSpecification {
         #[doc = "Operation service specification."]
-        #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "metricSpecifications",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub metric_specifications: Vec<MetricSpecification>,
         #[doc = "Operation log specification."]
-        #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "logSpecifications",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub log_specifications: Vec<LogSpecification>,
     }
     impl ServiceSpecification {
@@ -14878,7 +16526,12 @@ pub struct OwaspCrsExclusionEntry {
     #[doc = "When matchVariable is a collection, operator used to specify which elements in the collection this exclusion applies to."]
     pub selector: String,
     #[doc = "The managed rule sets that are associated with the exclusion."]
-    #[serde(rename = "exclusionManagedRuleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exclusionManagedRuleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusion_managed_rule_sets: Vec<ExclusionManagedRuleSet>,
 }
 impl OwaspCrsExclusionEntry {
@@ -15049,7 +16702,12 @@ impl P2sVpnConnectionHealth {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct P2sVpnConnectionHealthRequest {
     #[doc = "The list of p2s vpn user names whose p2s vpn connection detailed health to retrieve for."]
-    #[serde(rename = "vpnUserNamesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnUserNamesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_user_names_filter: Vec<String>,
     #[doc = "The sas-url to download the P2S Vpn connection health detail."]
     #[serde(rename = "outputBlobSasUrl", default, skip_serializing_if = "Option::is_none")]
@@ -15064,7 +16722,12 @@ impl P2sVpnConnectionHealthRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct P2sVpnConnectionRequest {
     #[doc = "List of p2s vpn connection Ids."]
-    #[serde(rename = "vpnConnectionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnConnectionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_connection_ids: Vec<String>,
 }
 impl P2sVpnConnectionRequest {
@@ -15100,7 +16763,12 @@ pub struct P2sVpnGatewayProperties {
     #[serde(rename = "virtualHub", default, skip_serializing_if = "Option::is_none")]
     pub virtual_hub: Option<SubResource>,
     #[doc = "List of all p2s connection configurations of the gateway."]
-    #[serde(rename = "p2SConnectionConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "p2SConnectionConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub p2_s_connection_configurations: Vec<P2sConnectionConfiguration>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -15115,7 +16783,12 @@ pub struct P2sVpnGatewayProperties {
     #[serde(rename = "vpnClientConnectionHealth", default, skip_serializing_if = "Option::is_none")]
     pub vpn_client_connection_health: Option<VpnClientConnectionHealth>,
     #[doc = "List of all customer specified DNS servers IP addresses."]
-    #[serde(rename = "customDnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_dns_servers: Vec<String>,
     #[doc = "Enable Routing Preference property for the Public IP Interface of the P2SVpnGateway."]
     #[serde(rename = "isRoutingPreferenceInternet", default, skip_serializing_if = "Option::is_none")]
@@ -15226,7 +16899,11 @@ pub mod packet_capture_filter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PacketCaptureListResult {
     #[doc = "Information about packet capture sessions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PacketCaptureResult>,
 }
 impl azure_core::Continuable for PacketCaptureListResult {
@@ -15258,7 +16935,11 @@ pub struct PacketCaptureParameters {
     #[serde(rename = "storageLocation")]
     pub storage_location: PacketCaptureStorageLocation,
     #[doc = "A list of packet capture filters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<PacketCaptureFilter>,
 }
 impl PacketCaptureParameters {
@@ -15292,7 +16973,12 @@ pub struct PacketCaptureQueryStatusResult {
     #[serde(rename = "stopReason", default, skip_serializing_if = "Option::is_none")]
     pub stop_reason: Option<String>,
     #[doc = "List of errors of packet capture session."]
-    #[serde(rename = "packetCaptureError", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packetCaptureError",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub packet_capture_error: Vec<String>,
 }
 impl PacketCaptureQueryStatusResult {
@@ -15475,7 +17161,11 @@ impl PeerExpressRouteCircuitConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeerExpressRouteCircuitConnectionListResult {
     #[doc = "The global reach peer circuit connection associated with Private Peering in an ExpressRoute Circuit."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeerExpressRouteCircuitConnection>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15556,7 +17246,11 @@ impl PeerRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeerRouteList {
     #[doc = "List of peer routes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeerRoute>,
 }
 impl PeerRouteList {
@@ -15810,7 +17504,12 @@ pub struct PrepareNetworkPoliciesRequest {
     #[serde(rename = "serviceName", default, skip_serializing_if = "Option::is_none")]
     pub service_name: Option<String>,
     #[doc = "A list of NetworkIntentPolicyConfiguration."]
-    #[serde(rename = "networkIntentPolicyConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkIntentPolicyConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_intent_policy_configurations: Vec<NetworkIntentPolicyConfiguration>,
 }
 impl PrepareNetworkPoliciesRequest {
@@ -15857,7 +17556,11 @@ impl PrivateDnsZoneGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateDnsZoneGroupListResult {
     #[doc = "A list of private dns zone group resources in a private endpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateDnsZoneGroup>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15881,7 +17584,12 @@ pub struct PrivateDnsZoneGroupPropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "A collection of private dns zone configurations of the private dns zone group."]
-    #[serde(rename = "privateDnsZoneConfigs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateDnsZoneConfigs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_dns_zone_configs: Vec<PrivateDnsZoneConfig>,
 }
 impl PrivateDnsZoneGroupPropertiesFormat {
@@ -15896,7 +17604,12 @@ pub struct PrivateDnsZonePropertiesFormat {
     #[serde(rename = "privateDnsZoneId", default, skip_serializing_if = "Option::is_none")]
     pub private_dns_zone_id: Option<String>,
     #[doc = "A collection of information regarding a recordSet, holding information to identify private resources."]
-    #[serde(rename = "recordSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recordSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub record_sets: Vec<RecordSet>,
 }
 impl PrivateDnsZonePropertiesFormat {
@@ -15951,7 +17664,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "A list of PrivateEndpointConnection resources for a specific private link service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16032,7 +17749,11 @@ impl PrivateEndpointIpConfigurationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointListResult {
     #[doc = "A list of private endpoint resources in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpoint>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16056,25 +17777,55 @@ pub struct PrivateEndpointProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub subnet: Option<Subnet>,
     #[doc = "An array of references to the network interfaces created for this private endpoint."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "A grouping of information about the connection to the remote resource."]
-    #[serde(rename = "privateLinkServiceConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkServiceConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_service_connections: Vec<PrivateLinkServiceConnection>,
     #[doc = "A grouping of information about the connection to the remote resource. Used when the network admin does not have access to approve connections to the remote resource."]
-    #[serde(rename = "manualPrivateLinkServiceConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "manualPrivateLinkServiceConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manual_private_link_service_connections: Vec<PrivateLinkServiceConnection>,
     #[doc = "An array of custom dns configurations."]
-    #[serde(rename = "customDnsConfigs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDnsConfigs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_dns_configs: Vec<CustomDnsConfigPropertiesFormat>,
     #[doc = "Application security groups in which the private endpoint IP configuration is included."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<ApplicationSecurityGroup>,
     #[doc = "A list of IP configurations of the private endpoint. This will be used to map to the First Party Service's endpoints."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<PrivateEndpointIpConfiguration>,
     #[doc = "The custom name of the network interface attached to the private endpoint."]
     #[serde(rename = "customNetworkInterfaceName", default, skip_serializing_if = "Option::is_none")]
@@ -16138,7 +17889,12 @@ pub struct PrivateLinkServiceConnectionProperties {
     #[serde(rename = "privateLinkServiceId", default, skip_serializing_if = "Option::is_none")]
     pub private_link_service_id: Option<String>,
     #[doc = "The ID(s) of the group(s) obtained from the remote resource that this private endpoint should connect to."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "A message passed to the owner of the remote resource with this connection request. Restricted to 140 chars."]
     #[serde(rename = "requestMessage", default, skip_serializing_if = "Option::is_none")]
@@ -16224,7 +17980,11 @@ impl PrivateLinkServiceIpConfigurationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkServiceListResult {
     #[doc = "A list of PrivateLinkService resources in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkService>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16245,19 +18005,39 @@ impl PrivateLinkServiceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkServiceProperties {
     #[doc = "An array of references to the load balancer IP configurations."]
-    #[serde(rename = "loadBalancerFrontendIpConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerFrontendIpConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_frontend_ip_configurations: Vec<FrontendIpConfiguration>,
     #[doc = "An array of private link service IP configurations."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<PrivateLinkServiceIpConfiguration>,
     #[doc = "An array of references to the network interfaces created for this private link service."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "An array of list about connections to the private endpoint."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The visibility list of the private link service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -16266,7 +18046,11 @@ pub struct PrivateLinkServiceProperties {
     #[serde(rename = "autoApproval", default, skip_serializing_if = "Option::is_none")]
     pub auto_approval: Option<serde_json::Value>,
     #[doc = "The list of Fqdn."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdns: Vec<String>,
     #[doc = "The alias of the private link service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -16319,7 +18103,12 @@ impl Probe {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ProbePropertiesFormat {
     #[doc = "The load balancer rules that use this probe."]
-    #[serde(rename = "loadBalancingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_rules: Vec<SubResource>,
     #[doc = "The protocol of the end point. If 'Tcp' is specified, a received ACK is required for the probe to be successful. If 'Http' or 'Https' is specified, a 200 OK response from the specifies URI is required for the probe to be successful."]
     pub protocol: probe_properties_format::Protocol,
@@ -16397,10 +18186,18 @@ pub mod probe_properties_format {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PropagatedRouteTable {
     #[doc = "The list of labels."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "The list of resource ids of all the RouteTables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ids: Vec<SubResource>,
 }
 impl PropagatedRouteTable {
@@ -16625,7 +18422,11 @@ pub struct PublicIpAddress {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "A list of availability zones denoting the IP allocated for the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl PublicIpAddress {
@@ -16655,7 +18456,11 @@ impl PublicIpAddressDnsSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PublicIpAddressListResult {
     #[doc = "A list of public IP addresses that exists in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PublicIpAddress>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16691,7 +18496,12 @@ pub struct PublicIpAddressPropertiesFormat {
     #[serde(rename = "ddosSettings", default, skip_serializing_if = "Option::is_none")]
     pub ddos_settings: Option<DdosSettings>,
     #[doc = "The list of tags associated with the public IP address."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<IpTag>,
     #[doc = "The IP address associated with the public IP address resource."]
     #[serde(rename = "ipAddress", default, skip_serializing_if = "Option::is_none")]
@@ -16922,7 +18732,11 @@ pub struct PublicIpPrefix {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "A list of availability zones denoting the IP allocated for the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl PublicIpPrefix {
@@ -16934,7 +18748,11 @@ impl PublicIpPrefix {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PublicIpPrefixListResult {
     #[doc = "A list of public IP prefixes that exists in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PublicIpPrefix>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16958,7 +18776,12 @@ pub struct PublicIpPrefixPropertiesFormat {
     #[serde(rename = "publicIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub public_ip_address_version: Option<IpVersion>,
     #[doc = "The list of tags associated with the public IP prefix."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<IpTag>,
     #[doc = "The Length of the Public IP Prefix."]
     #[serde(rename = "prefixLength", default, skip_serializing_if = "Option::is_none")]
@@ -16967,7 +18790,12 @@ pub struct PublicIpPrefixPropertiesFormat {
     #[serde(rename = "ipPrefix", default, skip_serializing_if = "Option::is_none")]
     pub ip_prefix: Option<String>,
     #[doc = "The list of all referenced PublicIPAddresses."]
-    #[serde(rename = "publicIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<ReferencedPublicIpAddress>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "loadBalancerFrontendIpConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -17084,19 +18912,43 @@ pub mod public_ip_prefix_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QosDefinition {
     #[doc = "List of markings to be used in the configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub markings: Vec<i32>,
     #[doc = "Source IP ranges."]
-    #[serde(rename = "sourceIpRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_ranges: Vec<QosIpRange>,
     #[doc = "Destination IP ranges."]
-    #[serde(rename = "destinationIpRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationIpRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ip_ranges: Vec<QosIpRange>,
     #[doc = "Sources port ranges."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<QosPortRange>,
     #[doc = "Destination port ranges."]
-    #[serde(rename = "destinationPortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_port_ranges: Vec<QosPortRange>,
     #[doc = "RNM supported protocol types."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -17213,7 +19065,11 @@ pub struct QueryResults {
     #[serde(rename = "matchingRecordsCount", default, skip_serializing_if = "Option::is_none")]
     pub matching_records_count: Option<i64>,
     #[doc = "Array containing the results of the query"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub signatures: Vec<SingleQueryResult>,
 }
 impl QueryResults {
@@ -17274,7 +19130,12 @@ pub struct RecordSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub ttl: Option<i64>,
     #[doc = "The private ip address of the private endpoint."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
 }
 impl RecordSet {
@@ -17407,7 +19268,11 @@ impl ResourceNavigationLinkFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceNavigationLinksListResult {
     #[doc = "The resource navigation links in a subnet."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceNavigationLink>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -17422,7 +19287,11 @@ impl ResourceNavigationLinksListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSet {
     #[doc = "The list of subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
 }
 impl ResourceSet {
@@ -17493,7 +19362,11 @@ impl RouteFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RouteFilterListResult {
     #[doc = "A list of route filters in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RouteFilter>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -17514,13 +19387,26 @@ impl RouteFilterListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RouteFilterPropertiesFormat {
     #[doc = "Collection of RouteFilterRules contained within a route filter."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<RouteFilterRule>,
     #[doc = "A collection of references to express route circuit peerings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peerings: Vec<ExpressRouteCircuitPeering>,
     #[doc = "A collection of references to express route circuit ipv6 peerings."]
-    #[serde(rename = "ipv6Peerings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv6Peerings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv6_peerings: Vec<ExpressRouteCircuitPeering>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -17558,7 +19444,11 @@ impl RouteFilterRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RouteFilterRuleListResult {
     #[doc = "A list of RouteFilterRules in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RouteFilterRule>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -17645,7 +19535,11 @@ pub mod route_filter_rule_properties_format {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RouteListResult {
     #[doc = "A list of routes in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Route>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -17756,7 +19650,11 @@ impl RouteTable {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RouteTableListResult {
     #[doc = "A list of route tables in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RouteTable>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -17777,10 +19675,18 @@ impl RouteTableListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RouteTablePropertiesFormat {
     #[doc = "Collection of routes contained within a route table."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<Route>,
     #[doc = "A collection of references to subnets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<Subnet>,
     #[doc = "Whether to disable the routes learned by BGP on that route table. True means disable."]
     #[serde(rename = "disableBgpRoutePropagation", default, skip_serializing_if = "Option::is_none")]
@@ -17842,7 +19748,12 @@ impl RoutingIntent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingIntentProperties {
     #[doc = "List of routing policies."]
-    #[serde(rename = "routingPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "routingPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routing_policies: Vec<RoutingPolicy>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -17945,7 +19856,12 @@ impl SecurityGroupViewParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityGroupViewResult {
     #[doc = "List of network interfaces on the specified VM."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<SecurityGroupNetworkInterface>,
 }
 impl SecurityGroupViewResult {
@@ -18017,7 +19933,11 @@ impl Serialize for SecurityPartnerProviderConnectionStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityPartnerProviderListResult {
     #[doc = "List of Security Partner Providers in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SecurityPartnerProvider>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -18164,10 +20084,20 @@ pub struct SecurityRuleAssociations {
     #[serde(rename = "subnetAssociation", default, skip_serializing_if = "Option::is_none")]
     pub subnet_association: Option<SubnetAssociation>,
     #[doc = "Collection of default security rules of the network security group."]
-    #[serde(rename = "defaultSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_security_rules: Vec<SecurityRule>,
     #[doc = "Collection of effective security rules."]
-    #[serde(rename = "effectiveSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_security_rules: Vec<EffectiveNetworkSecurityRule>,
 }
 impl SecurityRuleAssociations {
@@ -18216,7 +20146,11 @@ impl Serialize for SecurityRuleDirection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityRuleListResult {
     #[doc = "The security rules in a network security group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SecurityRule>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -18251,25 +20185,55 @@ pub struct SecurityRulePropertiesFormat {
     #[serde(rename = "sourceAddressPrefix", default, skip_serializing_if = "Option::is_none")]
     pub source_address_prefix: Option<String>,
     #[doc = "The CIDR or source IP ranges."]
-    #[serde(rename = "sourceAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_address_prefixes: Vec<String>,
     #[doc = "The application security group specified as source."]
-    #[serde(rename = "sourceApplicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceApplicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_application_security_groups: Vec<ApplicationSecurityGroup>,
     #[doc = "The destination address prefix. CIDR or destination IP range. Asterisk '*' can also be used to match all source IPs. Default tags such as 'VirtualNetwork', 'AzureLoadBalancer' and 'Internet' can also be used."]
     #[serde(rename = "destinationAddressPrefix", default, skip_serializing_if = "Option::is_none")]
     pub destination_address_prefix: Option<String>,
     #[doc = "The destination address prefixes. CIDR or destination IP ranges."]
-    #[serde(rename = "destinationAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_address_prefixes: Vec<String>,
     #[doc = "The application security group specified as destination."]
-    #[serde(rename = "destinationApplicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationApplicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_application_security_groups: Vec<ApplicationSecurityGroup>,
     #[doc = "The source port ranges."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
     #[doc = "The destination port ranges."]
-    #[serde(rename = "destinationPortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_port_ranges: Vec<String>,
     #[doc = "Whether network traffic is allowed or denied."]
     pub access: SecurityRuleAccess,
@@ -18392,7 +20356,11 @@ pub struct ServiceAssociationLinkPropertiesFormat {
     #[serde(rename = "allowDelete", default, skip_serializing_if = "Option::is_none")]
     pub allow_delete: Option<bool>,
     #[doc = "A list of locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl ServiceAssociationLinkPropertiesFormat {
@@ -18404,7 +20372,11 @@ impl ServiceAssociationLinkPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceAssociationLinksListResult {
     #[doc = "The service association links in a subnet."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceAssociationLink>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -18422,7 +20394,11 @@ pub struct ServiceDelegationPropertiesFormat {
     #[serde(rename = "serviceName", default, skip_serializing_if = "Option::is_none")]
     pub service_name: Option<String>,
     #[doc = "The actions permitted to the service upon delegation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -18480,7 +20456,11 @@ impl ServiceEndpointPolicyDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceEndpointPolicyDefinitionListResult {
     #[doc = "The service endpoint policy definition in a service endpoint policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceEndpointPolicyDefinition>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -18507,7 +20487,12 @@ pub struct ServiceEndpointPolicyDefinitionPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub service: Option<String>,
     #[doc = "A list of service resources."]
-    #[serde(rename = "serviceResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_resources: Vec<String>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -18522,7 +20507,11 @@ impl ServiceEndpointPolicyDefinitionPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceEndpointPolicyListResult {
     #[doc = "A list of ServiceEndpointPolicy resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceEndpointPolicy>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -18543,10 +20532,19 @@ impl ServiceEndpointPolicyListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceEndpointPolicyPropertiesFormat {
     #[doc = "A collection of service endpoint policy definitions of the service endpoint policy."]
-    #[serde(rename = "serviceEndpointPolicyDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceEndpointPolicyDefinitions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_endpoint_policy_definitions: Vec<ServiceEndpointPolicyDefinition>,
     #[doc = "A collection of references to subnets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<Subnet>,
     #[doc = "The resource GUID property of the service endpoint policy resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -18558,7 +20556,12 @@ pub struct ServiceEndpointPolicyPropertiesFormat {
     #[serde(rename = "serviceAlias", default, skip_serializing_if = "Option::is_none")]
     pub service_alias: Option<String>,
     #[doc = "A collection of contextual service endpoint policy."]
-    #[serde(rename = "contextualServiceEndpointPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contextualServiceEndpointPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contextual_service_endpoint_policies: Vec<String>,
 }
 impl ServiceEndpointPolicyPropertiesFormat {
@@ -18573,7 +20576,11 @@ pub struct ServiceEndpointPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub service: Option<String>,
     #[doc = "A list of locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -18650,7 +20657,11 @@ impl ServiceTagInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceTagInformationListResult {
     #[doc = "The list of service tag information resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceTagInformation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -18680,7 +20691,12 @@ pub struct ServiceTagInformationPropertiesFormat {
     #[serde(rename = "systemService", default, skip_serializing_if = "Option::is_none")]
     pub system_service: Option<String>,
     #[doc = "The list of IP address prefixes."]
-    #[serde(rename = "addressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefixes: Vec<String>,
     #[doc = "The state of the service tag."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -18710,7 +20726,11 @@ pub struct ServiceTagsListResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub cloud: Option<String>,
     #[doc = "The list of service tag information resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<ServiceTagInformation>,
     #[doc = "The URL to get next page of service tag information resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -18725,7 +20745,12 @@ impl ServiceTagsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SessionIds {
     #[doc = "List of session IDs."]
-    #[serde(rename = "sessionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sessionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub session_ids: Vec<String>,
 }
 impl SessionIds {
@@ -18749,7 +20774,12 @@ impl SignatureOverridesFilterValuesQuery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignatureOverridesFilterValuesResponse {
     #[doc = "Describes the possible values"]
-    #[serde(rename = "filterValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filterValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filter_values: Vec<String>,
 }
 impl SignatureOverridesFilterValuesResponse {
@@ -18803,7 +20833,11 @@ pub mod signatures_overrides {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignaturesOverridesList {
     #[doc = "Describes a list consisting exactly one item describing the policy's signature override status"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SignaturesOverrides>,
 }
 impl SignaturesOverridesList {
@@ -18835,10 +20869,20 @@ pub struct SingleQueryResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub protocol: Option<String>,
     #[doc = "Describes the list of source ports related to this signature"]
-    #[serde(rename = "sourcePorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ports: Vec<PortsList>,
     #[doc = "Describes the list of destination ports related to this signature"]
-    #[serde(rename = "destinationPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ports: Vec<PortsList>,
     #[doc = "Describes the last updated time of the signature (provided from 3rd party vendor)"]
     #[serde(rename = "lastUpdated", default, skip_serializing_if = "Option::is_none")]
@@ -18928,7 +20972,12 @@ pub struct StaticRoute {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of all address prefixes."]
-    #[serde(rename = "addressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefixes: Vec<String>,
     #[doc = "The ip address of the next hop."]
     #[serde(rename = "nextHopIpAddress", default, skip_serializing_if = "Option::is_none")]
@@ -18981,7 +21030,12 @@ pub struct SubnetAssociation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Collection of custom security rules."]
-    #[serde(rename = "securityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_rules: Vec<SecurityRule>,
 }
 impl SubnetAssociation {
@@ -18993,7 +21047,11 @@ impl SubnetAssociation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubnetListResult {
     #[doc = "The subnets in a virtual network."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Subnet>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -19017,7 +21075,12 @@ pub struct SubnetPropertiesFormat {
     #[serde(rename = "addressPrefix", default, skip_serializing_if = "Option::is_none")]
     pub address_prefix: Option<String>,
     #[doc = "List of address prefixes for the subnet."]
-    #[serde(rename = "addressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefixes: Vec<String>,
     #[doc = "NetworkSecurityGroup resource."]
     #[serde(rename = "networkSecurityGroup", default, skip_serializing_if = "Option::is_none")]
@@ -19029,31 +21092,75 @@ pub struct SubnetPropertiesFormat {
     #[serde(rename = "natGateway", default, skip_serializing_if = "Option::is_none")]
     pub nat_gateway: Option<SubResource>,
     #[doc = "An array of service endpoints."]
-    #[serde(rename = "serviceEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_endpoints: Vec<ServiceEndpointPropertiesFormat>,
     #[doc = "An array of service endpoint policies."]
-    #[serde(rename = "serviceEndpointPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceEndpointPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_endpoint_policies: Vec<ServiceEndpointPolicy>,
     #[doc = "An array of references to private endpoints."]
-    #[serde(rename = "privateEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoints: Vec<PrivateEndpoint>,
     #[doc = "An array of references to the network interface IP configurations using subnet."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<IpConfiguration>,
     #[doc = "Array of IP configuration profiles which reference this subnet."]
-    #[serde(rename = "ipConfigurationProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurationProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configuration_profiles: Vec<IpConfigurationProfile>,
     #[doc = "Array of IpAllocation which reference this subnet."]
-    #[serde(rename = "ipAllocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAllocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_allocations: Vec<SubResource>,
     #[doc = "An array of references to the external resources using subnet."]
-    #[serde(rename = "resourceNavigationLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceNavigationLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_navigation_links: Vec<ResourceNavigationLink>,
     #[doc = "An array of references to services injecting into this subnet."]
-    #[serde(rename = "serviceAssociationLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceAssociationLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_association_links: Vec<ServiceAssociationLink>,
     #[doc = "An array of references to the delegations on the subnet."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegations: Vec<Delegation>,
     #[doc = "A read-only string identifying the intention of use for this subnet based on delegations and other user-defined properties."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -19068,7 +21175,12 @@ pub struct SubnetPropertiesFormat {
     #[serde(rename = "privateLinkServiceNetworkPolicies", default, skip_serializing_if = "Option::is_none")]
     pub private_link_service_network_policies: Option<subnet_properties_format::PrivateLinkServiceNetworkPolicies>,
     #[doc = "Application gateway IP configurations of virtual network resource."]
-    #[serde(rename = "applicationGatewayIpConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayIpConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_ip_configurations: Vec<ApplicationGatewayIpConfiguration>,
 }
 impl SubnetPropertiesFormat {
@@ -19188,7 +21300,11 @@ pub struct Topology {
     #[serde(rename = "lastModified", default, with = "azure_core::date::rfc3339::option")]
     pub last_modified: Option<time::OffsetDateTime>,
     #[doc = "A list of topology resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<TopologyResource>,
 }
 impl Topology {
@@ -19285,7 +21401,11 @@ pub struct TopologyResource {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "Holds the associations the resource has with other resources in the resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub associations: Vec<TopologyAssociation>,
 }
 impl TopologyResource {
@@ -19451,7 +21571,12 @@ pub struct TroubleshootingDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub detail: Option<String>,
     #[doc = "List of recommended actions."]
-    #[serde(rename = "recommendedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recommendedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommended_actions: Vec<TroubleshootingRecommendedActions>,
 }
 impl TroubleshootingDetails {
@@ -19525,7 +21650,11 @@ pub struct TroubleshootingResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "Information from troubleshooting."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub results: Vec<TroubleshootingDetails>,
 }
 impl TroubleshootingResult {
@@ -19694,7 +21823,11 @@ impl UsageName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsagesListResult {
     #[doc = "The list network resource usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -19933,10 +22066,20 @@ impl VirtualHub {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualHubEffectiveRoute {
     #[doc = "The list of address prefixes."]
-    #[serde(rename = "addressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefixes: Vec<String>,
     #[doc = "The list of next hops."]
-    #[serde(rename = "nextHops", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nextHops",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub next_hops: Vec<String>,
     #[doc = "The type of the next hop."]
     #[serde(rename = "nextHopType", default, skip_serializing_if = "Option::is_none")]
@@ -19957,7 +22100,11 @@ impl VirtualHubEffectiveRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualHubEffectiveRouteList {
     #[doc = "The list of effective routes configured on the virtual hub or the specified resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualHubEffectiveRoute>,
 }
 impl VirtualHubEffectiveRouteList {
@@ -20011,7 +22158,12 @@ pub struct VirtualHubProperties {
     #[serde(rename = "securityProviderName", default, skip_serializing_if = "Option::is_none")]
     pub security_provider_name: Option<String>,
     #[doc = "List of all virtual hub route table v2s associated with this VirtualHub."]
-    #[serde(rename = "virtualHubRouteTableV2s", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualHubRouteTableV2s",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_hub_route_table_v2s: Vec<VirtualHubRouteTableV2>,
     #[doc = "The sku of this VirtualHub."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -20020,16 +22172,31 @@ pub struct VirtualHubProperties {
     #[serde(rename = "routingState", default, skip_serializing_if = "Option::is_none")]
     pub routing_state: Option<RoutingState>,
     #[doc = "List of references to Bgp Connections."]
-    #[serde(rename = "bgpConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bgpConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bgp_connections: Vec<SubResource>,
     #[doc = "List of references to IpConfigurations."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<SubResource>,
     #[doc = "VirtualRouter ASN."]
     #[serde(rename = "virtualRouterAsn", default, skip_serializing_if = "Option::is_none")]
     pub virtual_router_asn: Option<i64>,
     #[doc = "VirtualRouter IPs."]
-    #[serde(rename = "virtualRouterIps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualRouterIps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_router_ips: Vec<String>,
     #[doc = "Flag to control transit for VirtualRouter hub."]
     #[serde(rename = "allowBranchToBranchTraffic", default, skip_serializing_if = "Option::is_none")]
@@ -20047,7 +22214,12 @@ impl VirtualHubProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualHubRoute {
     #[doc = "List of all addressPrefixes."]
-    #[serde(rename = "addressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefixes: Vec<String>,
     #[doc = "NextHop ip address."]
     #[serde(rename = "nextHopIpAddress", default, skip_serializing_if = "Option::is_none")]
@@ -20062,7 +22234,11 @@ impl VirtualHubRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualHubRouteTable {
     #[doc = "List of all routes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<VirtualHubRoute>,
 }
 impl VirtualHubRouteTable {
@@ -20094,10 +22270,19 @@ impl VirtualHubRouteTableV2 {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualHubRouteTableV2Properties {
     #[doc = "List of all routes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<VirtualHubRouteV2>,
     #[doc = "List of all connections attached to this route table v2."]
-    #[serde(rename = "attachedConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "attachedConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub attached_connections: Vec<String>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -20115,13 +22300,22 @@ pub struct VirtualHubRouteV2 {
     #[serde(rename = "destinationType", default, skip_serializing_if = "Option::is_none")]
     pub destination_type: Option<String>,
     #[doc = "List of all destinations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destinations: Vec<String>,
     #[doc = "The type of next hops."]
     #[serde(rename = "nextHopType", default, skip_serializing_if = "Option::is_none")]
     pub next_hop_type: Option<String>,
     #[doc = "NextHops ip address."]
-    #[serde(rename = "nextHops", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nextHops",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub next_hops: Vec<String>,
 }
 impl VirtualHubRouteV2 {
@@ -20333,7 +22527,12 @@ pub struct VirtualNetworkGatewayConnectionListEntityPropertiesFormat {
     #[serde(rename = "connectionStatus", default, skip_serializing_if = "Option::is_none")]
     pub connection_status: Option<VirtualNetworkGatewayConnectionStatus>,
     #[doc = "Collection of all tunnels' connection health status."]
-    #[serde(rename = "tunnelConnectionStatus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tunnelConnectionStatus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tunnel_connection_status: Vec<TunnelConnectionHealth>,
     #[doc = "The egress bytes transferred in this connection."]
     #[serde(rename = "egressBytesTransferred", default, skip_serializing_if = "Option::is_none")]
@@ -20351,10 +22550,20 @@ pub struct VirtualNetworkGatewayConnectionListEntityPropertiesFormat {
     #[serde(rename = "usePolicyBasedTrafficSelectors", default, skip_serializing_if = "Option::is_none")]
     pub use_policy_based_traffic_selectors: Option<bool>,
     #[doc = "The IPSec Policies to be considered by this connection."]
-    #[serde(rename = "ipsecPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipsecPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipsec_policies: Vec<IpsecPolicy>,
     #[doc = "The Traffic Selector Policies to be considered by this connection."]
-    #[serde(rename = "trafficSelectorPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trafficSelectorPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traffic_selector_policies: Vec<TrafficSelectorPolicy>,
     #[doc = "The resource GUID property of the virtual network gateway connection resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -20400,7 +22609,11 @@ impl VirtualNetworkGatewayConnectionListEntityPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkGatewayConnectionListResult {
     #[doc = "A list of VirtualNetworkGatewayConnection resources that exists in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkGatewayConnection>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -20472,10 +22685,20 @@ pub struct VirtualNetworkGatewayConnectionPropertiesFormat {
     #[serde(rename = "localNetworkGateway2", default, skip_serializing_if = "Option::is_none")]
     pub local_network_gateway2: Option<LocalNetworkGateway>,
     #[doc = "List of ingress NatRules."]
-    #[serde(rename = "ingressNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ingressNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ingress_nat_rules: Vec<SubResource>,
     #[doc = "List of egress NatRules."]
-    #[serde(rename = "egressNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "egressNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub egress_nat_rules: Vec<SubResource>,
     #[doc = "Gateway connection type."]
     #[serde(rename = "connectionType")]
@@ -20499,7 +22722,12 @@ pub struct VirtualNetworkGatewayConnectionPropertiesFormat {
     #[serde(rename = "connectionStatus", default, skip_serializing_if = "Option::is_none")]
     pub connection_status: Option<VirtualNetworkGatewayConnectionStatus>,
     #[doc = "Collection of all tunnels' connection health status."]
-    #[serde(rename = "tunnelConnectionStatus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tunnelConnectionStatus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tunnel_connection_status: Vec<TunnelConnectionHealth>,
     #[doc = "The egress bytes transferred in this connection."]
     #[serde(rename = "egressBytesTransferred", default, skip_serializing_if = "Option::is_none")]
@@ -20520,10 +22748,20 @@ pub struct VirtualNetworkGatewayConnectionPropertiesFormat {
     #[serde(rename = "usePolicyBasedTrafficSelectors", default, skip_serializing_if = "Option::is_none")]
     pub use_policy_based_traffic_selectors: Option<bool>,
     #[doc = "The IPSec Policies to be considered by this connection."]
-    #[serde(rename = "ipsecPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipsecPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipsec_policies: Vec<IpsecPolicy>,
     #[doc = "The Traffic Selector Policies to be considered by this connection."]
-    #[serde(rename = "trafficSelectorPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trafficSelectorPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traffic_selector_policies: Vec<TrafficSelectorPolicy>,
     #[doc = "The resource GUID property of the virtual network gateway connection resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -20697,7 +22935,11 @@ impl VirtualNetworkGatewayIpConfigurationPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkGatewayListConnectionsResult {
     #[doc = "A list of VirtualNetworkGatewayConnection resources that exists in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkGatewayConnectionListEntity>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -20718,7 +22960,11 @@ impl VirtualNetworkGatewayListConnectionsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkGatewayListResult {
     #[doc = "A list of VirtualNetworkGateway resources that exists in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkGateway>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -20771,10 +23017,20 @@ pub struct VirtualNetworkGatewayNatRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub mode: Option<virtual_network_gateway_nat_rule_properties::Mode>,
     #[doc = "The private IP address internal mapping for NAT."]
-    #[serde(rename = "internalMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "internalMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub internal_mappings: Vec<VpnNatRuleMapping>,
     #[doc = "The private IP address external mapping for NAT."]
-    #[serde(rename = "externalMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_mappings: Vec<VpnNatRuleMapping>,
     #[doc = "The IP Configuration ID this NAT rule applies to."]
     #[serde(rename = "ipConfigurationId", default, skip_serializing_if = "Option::is_none")]
@@ -20866,7 +23122,12 @@ pub mod virtual_network_gateway_nat_rule_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkGatewayPropertiesFormat {
     #[doc = "IP configurations for virtual network gateway."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<VirtualNetworkGatewayIpConfiguration>,
     #[doc = "The type of this virtual network gateway."]
     #[serde(rename = "gatewayType", default, skip_serializing_if = "Option::is_none")]
@@ -20920,7 +23181,12 @@ pub struct VirtualNetworkGatewayPropertiesFormat {
     #[serde(rename = "vNetExtendedLocationResourceId", default, skip_serializing_if = "Option::is_none")]
     pub v_net_extended_location_resource_id: Option<String>,
     #[doc = "NatRules for virtual network gateway."]
-    #[serde(rename = "natRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "natRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nat_rules: Vec<VirtualNetworkGatewayNatRule>,
     #[doc = "EnableBgpRouteTranslationForNat flag."]
     #[serde(rename = "enableBgpRouteTranslationForNat", default, skip_serializing_if = "Option::is_none")]
@@ -21224,7 +23490,11 @@ pub mod virtual_network_gateway_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkListResult {
     #[doc = "A list of VirtualNetwork resources in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetwork>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -21245,7 +23515,11 @@ impl VirtualNetworkListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkListUsageResult {
     #[doc = "VirtualNetwork usage stats."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkUsage>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -21289,7 +23563,11 @@ impl VirtualNetworkPeering {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkPeeringListResult {
     #[doc = "The peerings in a virtual network."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkPeering>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -21453,10 +23731,19 @@ pub struct VirtualNetworkPropertiesFormat {
     #[serde(rename = "flowTimeoutInMinutes", default, skip_serializing_if = "Option::is_none")]
     pub flow_timeout_in_minutes: Option<i32>,
     #[doc = "A list of subnets in a Virtual Network."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<Subnet>,
     #[doc = "A list of peerings in a Virtual Network."]
-    #[serde(rename = "virtualNetworkPeerings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkPeerings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_peerings: Vec<VirtualNetworkPeering>,
     #[doc = "The resourceGuid property of the Virtual Network resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -21480,7 +23767,12 @@ pub struct VirtualNetworkPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<VirtualNetworkEncryption>,
     #[doc = "Array of IpAllocation which reference this VNET."]
-    #[serde(rename = "ipAllocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAllocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_allocations: Vec<SubResource>,
 }
 impl VirtualNetworkPropertiesFormat {
@@ -21509,7 +23801,11 @@ impl VirtualNetworkTap {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkTapListResult {
     #[doc = "A list of VirtualNetworkTaps in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkTap>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -21530,7 +23826,12 @@ impl VirtualNetworkTapListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkTapPropertiesFormat {
     #[doc = "Specifies the list of resource IDs for the network interface IP configuration that needs to be tapped."]
-    #[serde(rename = "networkInterfaceTapConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceTapConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_tap_configurations: Vec<NetworkInterfaceTapConfiguration>,
     #[doc = "The resource GUID property of the virtual network tap resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -21621,7 +23922,11 @@ impl VirtualRouter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualRouterListResult {
     #[doc = "List of Virtual Routers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualRouter>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -21665,7 +23970,11 @@ impl VirtualRouterPeering {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualRouterPeeringListResult {
     #[doc = "List of VirtualRouterPeerings in a VirtualRouter."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualRouterPeering>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -21707,7 +24016,12 @@ pub struct VirtualRouterPropertiesFormat {
     #[serde(rename = "virtualRouterAsn", default, skip_serializing_if = "Option::is_none")]
     pub virtual_router_asn: Option<i64>,
     #[doc = "VirtualRouter IPs."]
-    #[serde(rename = "virtualRouterIps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualRouterIps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_router_ips: Vec<String>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "hostedSubnet", default, skip_serializing_if = "Option::is_none")]
@@ -21716,7 +24030,11 @@ pub struct VirtualRouterPropertiesFormat {
     #[serde(rename = "hostedGateway", default, skip_serializing_if = "Option::is_none")]
     pub hosted_gateway: Option<SubResource>,
     #[doc = "List of references to VirtualRouterPeerings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peerings: Vec<SubResource>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -21755,10 +24073,20 @@ pub struct VirtualWanProperties {
     #[serde(rename = "disableVpnEncryption", default, skip_serializing_if = "Option::is_none")]
     pub disable_vpn_encryption: Option<bool>,
     #[doc = "List of VirtualHubs in the VirtualWAN."]
-    #[serde(rename = "virtualHubs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualHubs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_hubs: Vec<SubResource>,
     #[doc = "List of VpnSites in the VirtualWAN."]
-    #[serde(rename = "vpnSites", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnSites",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_sites: Vec<SubResource>,
     #[doc = "True if branch to branch traffic is allowed."]
     #[serde(rename = "allowBranchToBranchTraffic", default, skip_serializing_if = "Option::is_none")]
@@ -21840,7 +24168,12 @@ impl Serialize for VirtualWanSecurityProviderType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualWanSecurityProviders {
     #[doc = "List of VirtualWAN security providers."]
-    #[serde(rename = "supportedProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_providers: Vec<VirtualWanSecurityProvider>,
 }
 impl VirtualWanSecurityProviders {
@@ -21867,10 +24200,20 @@ impl VirtualWanVpnProfileParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VnetRoute {
     #[doc = "List of all Static Routes."]
-    #[serde(rename = "staticRoutes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "staticRoutes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub static_routes: Vec<StaticRoute>,
     #[doc = "The list of references to HubBgpConnection objects."]
-    #[serde(rename = "bgpConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bgpConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bgp_connections: Vec<SubResource>,
 }
 impl VnetRoute {
@@ -21885,19 +24228,44 @@ pub struct VpnClientConfiguration {
     #[serde(rename = "vpnClientAddressPool", default, skip_serializing_if = "Option::is_none")]
     pub vpn_client_address_pool: Option<AddressSpace>,
     #[doc = "VpnClientRootCertificate for virtual network gateway."]
-    #[serde(rename = "vpnClientRootCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnClientRootCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_client_root_certificates: Vec<VpnClientRootCertificate>,
     #[doc = "VpnClientRevokedCertificate for Virtual network gateway."]
-    #[serde(rename = "vpnClientRevokedCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnClientRevokedCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_client_revoked_certificates: Vec<VpnClientRevokedCertificate>,
     #[doc = "VpnClientProtocols for Virtual network gateway."]
-    #[serde(rename = "vpnClientProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnClientProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_client_protocols: Vec<String>,
     #[doc = "VPN authentication types for the virtual network gateway.."]
-    #[serde(rename = "vpnAuthenticationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnAuthenticationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_authentication_types: Vec<String>,
     #[doc = "VpnClientIpsecPolicies for virtual network gateway P2S client."]
-    #[serde(rename = "vpnClientIpsecPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnClientIpsecPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_client_ipsec_policies: Vec<IpsecPolicy>,
     #[doc = "The radius server address property of the VirtualNetworkGateway resource for vpn client connection."]
     #[serde(rename = "radiusServerAddress", default, skip_serializing_if = "Option::is_none")]
@@ -21906,7 +24274,12 @@ pub struct VpnClientConfiguration {
     #[serde(rename = "radiusServerSecret", default, skip_serializing_if = "Option::is_none")]
     pub radius_server_secret: Option<String>,
     #[doc = "The radiusServers property for multiple radius server configuration."]
-    #[serde(rename = "radiusServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "radiusServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub radius_servers: Vec<RadiusServer>,
     #[doc = "The AADTenant property of the VirtualNetworkGateway resource for vpn client connection used for AAD authentication."]
     #[serde(rename = "aadTenant", default, skip_serializing_if = "Option::is_none")]
@@ -21936,7 +24309,12 @@ pub struct VpnClientConnectionHealth {
     #[serde(rename = "vpnClientConnectionsCount", default, skip_serializing_if = "Option::is_none")]
     pub vpn_client_connections_count: Option<i32>,
     #[doc = "List of allocated ip addresses to the connected p2s vpn clients."]
-    #[serde(rename = "allocatedIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allocatedIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allocated_ip_addresses: Vec<String>,
 }
 impl VpnClientConnectionHealth {
@@ -21993,7 +24371,11 @@ impl VpnClientConnectionHealthDetail {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VpnClientConnectionHealthDetailListResult {
     #[doc = "List of vpn client connection health."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnClientConnectionHealthDetail>,
 }
 impl VpnClientConnectionHealthDetailListResult {
@@ -22065,7 +24447,12 @@ pub struct VpnClientParameters {
     #[serde(rename = "radiusServerAuthCertificate", default, skip_serializing_if = "Option::is_none")]
     pub radius_server_auth_certificate: Option<String>,
     #[doc = "A list of client root certificates public certificate data encoded as Base-64 strings. Optional parameter for external radius based authentication with EAPTLS."]
-    #[serde(rename = "clientRootCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientRootCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_root_certificates: Vec<String>,
 }
 impl VpnClientParameters {
@@ -22217,7 +24604,12 @@ pub struct VpnConnectionPacketCaptureStartParameters {
     #[serde(rename = "filterData", default, skip_serializing_if = "Option::is_none")]
     pub filter_data: Option<String>,
     #[doc = "List of site link connection names."]
-    #[serde(rename = "linkConnectionNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkConnectionNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub link_connection_names: Vec<String>,
 }
 impl VpnConnectionPacketCaptureStartParameters {
@@ -22232,7 +24624,12 @@ pub struct VpnConnectionPacketCaptureStopParameters {
     #[serde(rename = "sasUrl", default, skip_serializing_if = "Option::is_none")]
     pub sas_url: Option<String>,
     #[doc = "List of site link connection names."]
-    #[serde(rename = "linkConnectionNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkConnectionNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub link_connection_names: Vec<String>,
 }
 impl VpnConnectionPacketCaptureStopParameters {
@@ -22277,10 +24674,20 @@ pub struct VpnConnectionProperties {
     #[serde(rename = "usePolicyBasedTrafficSelectors", default, skip_serializing_if = "Option::is_none")]
     pub use_policy_based_traffic_selectors: Option<bool>,
     #[doc = "The IPSec Policies to be considered by this connection."]
-    #[serde(rename = "ipsecPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipsecPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipsec_policies: Vec<IpsecPolicy>,
     #[doc = "The Traffic Selector Policies to be considered by this connection."]
-    #[serde(rename = "trafficSelectorPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trafficSelectorPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traffic_selector_policies: Vec<TrafficSelectorPolicy>,
     #[doc = "EnableBgp flag."]
     #[serde(rename = "enableRateLimiting", default, skip_serializing_if = "Option::is_none")]
@@ -22295,7 +24702,12 @@ pub struct VpnConnectionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "List of all vpn site link connections to the gateway."]
-    #[serde(rename = "vpnLinkConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnLinkConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_link_connections: Vec<VpnSiteLinkConnection>,
     #[doc = "Routing Configuration indicating the associated and propagated route tables for this connection."]
     #[serde(rename = "routingConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -22440,19 +24852,39 @@ pub struct VpnGatewayNatRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub mode: Option<vpn_gateway_nat_rule_properties::Mode>,
     #[doc = "The private IP address internal mapping for NAT."]
-    #[serde(rename = "internalMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "internalMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub internal_mappings: Vec<VpnNatRuleMapping>,
     #[doc = "The private IP address external mapping for NAT."]
-    #[serde(rename = "externalMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_mappings: Vec<VpnNatRuleMapping>,
     #[doc = "The IP Configuration ID this NAT rule applies to."]
     #[serde(rename = "ipConfigurationId", default, skip_serializing_if = "Option::is_none")]
     pub ip_configuration_id: Option<String>,
     #[doc = "List of egress VpnSiteLinkConnections."]
-    #[serde(rename = "egressVpnSiteLinkConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "egressVpnSiteLinkConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub egress_vpn_site_link_connections: Vec<SubResource>,
     #[doc = "List of ingress VpnSiteLinkConnections."]
-    #[serde(rename = "ingressVpnSiteLinkConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ingressVpnSiteLinkConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ingress_vpn_site_link_connections: Vec<SubResource>,
 }
 impl VpnGatewayNatRuleProperties {
@@ -22568,7 +25000,11 @@ pub struct VpnGatewayProperties {
     #[serde(rename = "virtualHub", default, skip_serializing_if = "Option::is_none")]
     pub virtual_hub: Option<SubResource>,
     #[doc = "List of all vpn connections to the gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connections: Vec<VpnConnection>,
     #[doc = "BGP settings details."]
     #[serde(rename = "bgpSettings", default, skip_serializing_if = "Option::is_none")]
@@ -22580,7 +25016,12 @@ pub struct VpnGatewayProperties {
     #[serde(rename = "vpnGatewayScaleUnit", default, skip_serializing_if = "Option::is_none")]
     pub vpn_gateway_scale_unit: Option<i32>,
     #[doc = "List of all IPs configured on the gateway."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<VpnGatewayIpConfiguration>,
     #[doc = "Enable BGP routes translation for NAT on this VpnGateway."]
     #[serde(rename = "enableBgpRouteTranslationForNat", default, skip_serializing_if = "Option::is_none")]
@@ -22589,7 +25030,12 @@ pub struct VpnGatewayProperties {
     #[serde(rename = "isRoutingPreferenceInternet", default, skip_serializing_if = "Option::is_none")]
     pub is_routing_preference_internet: Option<bool>,
     #[doc = "List of all the nat Rules associated with the gateway."]
-    #[serde(rename = "natRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "natRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nat_rules: Vec<VpnGatewayNatRule>,
 }
 impl VpnGatewayProperties {
@@ -22765,25 +25211,60 @@ pub struct VpnServerConfigurationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "VPN protocols for the VpnServerConfiguration."]
-    #[serde(rename = "vpnProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_protocols: Vec<String>,
     #[doc = "VPN authentication types for the VpnServerConfiguration."]
-    #[serde(rename = "vpnAuthenticationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnAuthenticationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_authentication_types: Vec<String>,
     #[doc = "VPN client root certificate of VpnServerConfiguration."]
-    #[serde(rename = "vpnClientRootCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnClientRootCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_client_root_certificates: Vec<VpnServerConfigVpnClientRootCertificate>,
     #[doc = "VPN client revoked certificate of VpnServerConfiguration."]
-    #[serde(rename = "vpnClientRevokedCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnClientRevokedCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_client_revoked_certificates: Vec<VpnServerConfigVpnClientRevokedCertificate>,
     #[doc = "Radius Server root certificate of VpnServerConfiguration."]
-    #[serde(rename = "radiusServerRootCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "radiusServerRootCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub radius_server_root_certificates: Vec<VpnServerConfigRadiusServerRootCertificate>,
     #[doc = "Radius client root certificate of VpnServerConfiguration."]
-    #[serde(rename = "radiusClientRootCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "radiusClientRootCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub radius_client_root_certificates: Vec<VpnServerConfigRadiusClientRootCertificate>,
     #[doc = "VpnClientIpsecPolicies for VpnServerConfiguration."]
-    #[serde(rename = "vpnClientIpsecPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnClientIpsecPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_client_ipsec_policies: Vec<IpsecPolicy>,
     #[doc = "The radius server address property of the VpnServerConfiguration resource for point to site client connection."]
     #[serde(rename = "radiusServerAddress", default, skip_serializing_if = "Option::is_none")]
@@ -22792,7 +25273,12 @@ pub struct VpnServerConfigurationProperties {
     #[serde(rename = "radiusServerSecret", default, skip_serializing_if = "Option::is_none")]
     pub radius_server_secret: Option<String>,
     #[doc = "Multiple Radius Server configuration for VpnServerConfiguration."]
-    #[serde(rename = "radiusServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "radiusServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub radius_servers: Vec<RadiusServer>,
     #[doc = "AAD Vpn authentication type related parameters."]
     #[serde(rename = "aadAuthenticationParameters", default, skip_serializing_if = "Option::is_none")]
@@ -22801,7 +25287,12 @@ pub struct VpnServerConfigurationProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "List of references to P2SVpnGateways."]
-    #[serde(rename = "p2SVpnGateways", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "p2SVpnGateways",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub p2_s_vpn_gateways: Vec<P2sVpnGateway>,
     #[doc = "A unique read-only string that changes whenever the resource is updated."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -22816,7 +25307,12 @@ impl VpnServerConfigurationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VpnServerConfigurationsResponse {
     #[doc = "List of VpnServerConfigurations associated with VirtualWan."]
-    #[serde(rename = "vpnServerConfigurationResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnServerConfigurationResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_server_configuration_resource_ids: Vec<String>,
 }
 impl VpnServerConfigurationsResponse {
@@ -22940,7 +25436,12 @@ pub struct VpnSiteLinkConnectionProperties {
     #[serde(rename = "usePolicyBasedTrafficSelectors", default, skip_serializing_if = "Option::is_none")]
     pub use_policy_based_traffic_selectors: Option<bool>,
     #[doc = "The IPSec Policies to be considered by this connection."]
-    #[serde(rename = "ipsecPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipsecPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipsec_policies: Vec<IpsecPolicy>,
     #[doc = "EnableBgp flag."]
     #[serde(rename = "enableRateLimiting", default, skip_serializing_if = "Option::is_none")]
@@ -22952,10 +25453,20 @@ pub struct VpnSiteLinkConnectionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "List of ingress NatRules."]
-    #[serde(rename = "ingressNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ingressNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ingress_nat_rules: Vec<SubResource>,
     #[doc = "List of egress NatRules."]
-    #[serde(rename = "egressNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "egressNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub egress_nat_rules: Vec<SubResource>,
 }
 impl VpnSiteLinkConnectionProperties {
@@ -23057,7 +25568,12 @@ pub struct VpnSiteProperties {
     #[serde(rename = "isSecuritySite", default, skip_serializing_if = "Option::is_none")]
     pub is_security_site: Option<bool>,
     #[doc = "List of all vpn site links."]
-    #[serde(rename = "vpnSiteLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnSiteLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_site_links: Vec<VpnSiteLink>,
     #[doc = "The Office365 breakout policy."]
     #[serde(rename = "o365Policy", default, skip_serializing_if = "Option::is_none")]
@@ -23205,7 +25721,11 @@ impl WebApplicationFirewallPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebApplicationFirewallPolicyListResult {
     #[doc = "List of WebApplicationFirewallPolicies within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WebApplicationFirewallPolicy>,
     #[doc = "URL to get the next set of WebApplicationFirewallPolicy objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -23229,10 +25749,20 @@ pub struct WebApplicationFirewallPolicyPropertiesFormat {
     #[serde(rename = "policySettings", default, skip_serializing_if = "Option::is_none")]
     pub policy_settings: Option<PolicySettings>,
     #[doc = "The custom rules inside the policy."]
-    #[serde(rename = "customRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_rules: Vec<WebApplicationFirewallCustomRule>,
     #[doc = "A collection of references to application gateways."]
-    #[serde(rename = "applicationGateways", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGateways",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateways: Vec<ApplicationGateway>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -23244,10 +25774,20 @@ pub struct WebApplicationFirewallPolicyPropertiesFormat {
     #[serde(rename = "managedRules")]
     pub managed_rules: ManagedRulesDefinition,
     #[doc = "A collection of references to application gateway http listeners."]
-    #[serde(rename = "httpListeners", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpListeners",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_listeners: Vec<SubResource>,
     #[doc = "A collection of references to application gateway path rules."]
-    #[serde(rename = "pathBasedRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pathBasedRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path_based_rules: Vec<SubResource>,
 }
 impl WebApplicationFirewallPolicyPropertiesFormat {
diff --git a/services/mgmt/network/src/package_2021_08/models.rs b/services/mgmt/network/src/package_2021_08/models.rs
index d0454ccf5b..623cab7a36 100644
--- a/services/mgmt/network/src/package_2021_08/models.rs
+++ b/services/mgmt/network/src/package_2021_08/models.rs
@@ -62,7 +62,12 @@ impl Serialize for Access {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AddressSpace {
     #[doc = "A list of address blocks reserved for this virtual network in CIDR notation."]
-    #[serde(rename = "addressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefixes: Vec<String>,
 }
 impl AddressSpace {
@@ -82,7 +87,11 @@ pub struct ApplicationGateway {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Identity for the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -170,16 +179,31 @@ impl ApplicationGatewayAvailableSslOptions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayAvailableSslOptionsPropertiesFormat {
     #[doc = "List of available Ssl predefined policy."]
-    #[serde(rename = "predefinedPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "predefinedPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub predefined_policies: Vec<SubResource>,
     #[doc = "Ssl predefined policy name enums."]
     #[serde(rename = "defaultPolicy", default, skip_serializing_if = "Option::is_none")]
     pub default_policy: Option<PolicyNameEnum>,
     #[doc = "List of available Ssl cipher suites."]
-    #[serde(rename = "availableCipherSuites", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableCipherSuites",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_cipher_suites: Vec<CipherSuitesEnum>,
     #[doc = "List of available Ssl protocols."]
-    #[serde(rename = "availableProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_protocols: Vec<ProtocolsEnum>,
 }
 impl ApplicationGatewayAvailableSslOptionsPropertiesFormat {
@@ -191,7 +215,11 @@ impl ApplicationGatewayAvailableSslOptionsPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayAvailableSslPredefinedPolicies {
     #[doc = "List of available Ssl predefined policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationGatewaySslPredefinedPolicy>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -212,7 +240,11 @@ impl ApplicationGatewayAvailableSslPredefinedPolicies {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayAvailableWafRuleSetsResult {
     #[doc = "The list of application gateway rule sets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationGatewayFirewallRuleSet>,
 }
 impl ApplicationGatewayAvailableWafRuleSetsResult {
@@ -262,10 +294,20 @@ impl ApplicationGatewayBackendAddressPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayBackendAddressPoolPropertiesFormat {
     #[doc = "Collection of references to IPs defined in network interfaces."]
-    #[serde(rename = "backendIPConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendIPConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_ip_configurations: Vec<NetworkInterfaceIpConfiguration>,
     #[doc = "Backend addresses."]
-    #[serde(rename = "backendAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_addresses: Vec<ApplicationGatewayBackendAddress>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -280,7 +322,12 @@ impl ApplicationGatewayBackendAddressPoolPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayBackendHealth {
     #[doc = "A list of ApplicationGatewayBackendHealthPool resources."]
-    #[serde(rename = "backendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_address_pools: Vec<ApplicationGatewayBackendHealthPool>,
 }
 impl ApplicationGatewayBackendHealth {
@@ -295,7 +342,11 @@ pub struct ApplicationGatewayBackendHealthHttpSettings {
     #[serde(rename = "backendHttpSettings", default, skip_serializing_if = "Option::is_none")]
     pub backend_http_settings: Option<ApplicationGatewayBackendHttpSettings>,
     #[doc = "List of ApplicationGatewayBackendHealthServer resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub servers: Vec<ApplicationGatewayBackendHealthServer>,
 }
 impl ApplicationGatewayBackendHealthHttpSettings {
@@ -325,7 +376,12 @@ pub struct ApplicationGatewayBackendHealthPool {
     #[serde(rename = "backendAddressPool", default, skip_serializing_if = "Option::is_none")]
     pub backend_address_pool: Option<ApplicationGatewayBackendAddressPool>,
     #[doc = "List of ApplicationGatewayBackendHealthHttpSettings resources."]
-    #[serde(rename = "backendHttpSettingsCollection", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendHttpSettingsCollection",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_http_settings_collection: Vec<ApplicationGatewayBackendHealthHttpSettings>,
 }
 impl ApplicationGatewayBackendHealthPool {
@@ -442,10 +498,20 @@ pub struct ApplicationGatewayBackendHttpSettingsPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub probe: Option<SubResource>,
     #[doc = "Array of references to application gateway authentication certificates."]
-    #[serde(rename = "authenticationCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authenticationCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authentication_certificates: Vec<SubResource>,
     #[doc = "Array of references to application gateway trusted root certificates."]
-    #[serde(rename = "trustedRootCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedRootCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_root_certificates: Vec<SubResource>,
     #[doc = "Connection draining allows open connections to a backend server to be active for a specified time after the backend server got removed from the configuration."]
     #[serde(rename = "connectionDraining", default, skip_serializing_if = "Option::is_none")]
@@ -553,7 +619,12 @@ pub struct ApplicationGatewayBackendSettingsPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub probe: Option<SubResource>,
     #[doc = "Array of references to application gateway trusted root certificates."]
-    #[serde(rename = "trustedRootCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedRootCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_root_certificates: Vec<SubResource>,
     #[doc = "Server name indication to be sent to the backend servers for Tls protocol."]
     #[serde(rename = "hostName", default, skip_serializing_if = "Option::is_none")]
@@ -661,7 +732,11 @@ pub struct ApplicationGatewayFirewallDisabledRuleGroup {
     #[serde(rename = "ruleGroupName")]
     pub rule_group_name: String,
     #[doc = "The list of rules that will be disabled. If null, all rules of the rule group will be disabled."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<i32>,
 }
 impl ApplicationGatewayFirewallDisabledRuleGroup {
@@ -941,13 +1016,23 @@ pub struct ApplicationGatewayHttpListenerPropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "Custom error configurations of the HTTP listener."]
-    #[serde(rename = "customErrorConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customErrorConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_error_configurations: Vec<ApplicationGatewayCustomError>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "firewallPolicy", default, skip_serializing_if = "Option::is_none")]
     pub firewall_policy: Option<SubResource>,
     #[doc = "List of Host names for HTTP Listener that allows special wildcard characters as well."]
-    #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub host_names: Vec<String>,
 }
 impl ApplicationGatewayHttpListenerPropertiesFormat {
@@ -997,7 +1082,11 @@ impl ApplicationGatewayIpConfigurationPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayListResult {
     #[doc = "List of an application gateways in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationGateway>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1132,7 +1221,12 @@ impl ApplicationGatewayLoadDistributionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayLoadDistributionPolicyPropertiesFormat {
     #[doc = "Load Distribution Targets resource of an application gateway."]
-    #[serde(rename = "loadDistributionTargets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadDistributionTargets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_distribution_targets: Vec<ApplicationGatewayLoadDistributionTarget>,
     #[doc = "Load Distribution Algorithm enums."]
     #[serde(rename = "loadDistributionAlgorithm", default, skip_serializing_if = "Option::is_none")]
@@ -1242,7 +1336,11 @@ impl ApplicationGatewayPathRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayPathRulePropertiesFormat {
     #[doc = "Path rules of URL path map."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<String>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "backendAddressPool", default, skip_serializing_if = "Option::is_none")]
@@ -1298,7 +1396,11 @@ impl ApplicationGatewayPrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayPrivateEndpointConnectionListResult {
     #[doc = "List of private endpoint connections on an application gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationGatewayPrivateEndpointConnection>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1363,7 +1465,12 @@ impl ApplicationGatewayPrivateLinkConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayPrivateLinkConfigurationProperties {
     #[doc = "An array of application gateway private link ip configurations."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<ApplicationGatewayPrivateLinkIpConfiguration>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1448,7 +1555,11 @@ impl ApplicationGatewayPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayPrivateLinkResourceListResult {
     #[doc = "List of private link resources of an application gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationGatewayPrivateLinkResource>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1472,10 +1583,20 @@ pub struct ApplicationGatewayPrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required member names of private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl ApplicationGatewayPrivateLinkResourceProperties {
@@ -1513,7 +1634,12 @@ pub struct ApplicationGatewayProbeHealthResponseMatch {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub body: Option<String>,
     #[doc = "Allowed ranges of healthy status codes. Default range of healthy status codes is 200-399."]
-    #[serde(rename = "statusCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_codes: Vec<String>,
 }
 impl ApplicationGatewayProbeHealthResponseMatch {
@@ -1579,61 +1705,154 @@ pub struct ApplicationGatewayPropertiesFormat {
     #[serde(rename = "operationalState", default, skip_serializing_if = "Option::is_none")]
     pub operational_state: Option<application_gateway_properties_format::OperationalState>,
     #[doc = "Subnets of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "gatewayIPConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gatewayIPConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gateway_ip_configurations: Vec<ApplicationGatewayIpConfiguration>,
     #[doc = "Authentication certificates of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "authenticationCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authenticationCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authentication_certificates: Vec<ApplicationGatewayAuthenticationCertificate>,
     #[doc = "Trusted Root certificates of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "trustedRootCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedRootCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_root_certificates: Vec<ApplicationGatewayTrustedRootCertificate>,
     #[doc = "Trusted client certificates of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "trustedClientCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedClientCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_client_certificates: Vec<ApplicationGatewayTrustedClientCertificate>,
     #[doc = "SSL certificates of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "sslCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sslCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ssl_certificates: Vec<ApplicationGatewaySslCertificate>,
     #[doc = "Frontend IP addresses of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "frontendIPConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendIPConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_ip_configurations: Vec<ApplicationGatewayFrontendIpConfiguration>,
     #[doc = "Frontend ports of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "frontendPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_ports: Vec<ApplicationGatewayFrontendPort>,
     #[doc = "Probes of the application gateway resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub probes: Vec<ApplicationGatewayProbe>,
     #[doc = "Backend address pool of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "backendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_address_pools: Vec<ApplicationGatewayBackendAddressPool>,
     #[doc = "Backend http settings of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "backendHttpSettingsCollection", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendHttpSettingsCollection",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_http_settings_collection: Vec<ApplicationGatewayBackendHttpSettings>,
     #[doc = "Backend settings of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "backendSettingsCollection", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendSettingsCollection",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_settings_collection: Vec<ApplicationGatewayBackendSettings>,
     #[doc = "Http listeners of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "httpListeners", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpListeners",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_listeners: Vec<ApplicationGatewayHttpListener>,
     #[doc = "Listeners of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub listeners: Vec<ApplicationGatewayListener>,
     #[doc = "SSL profiles of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "sslProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sslProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ssl_profiles: Vec<ApplicationGatewaySslProfile>,
     #[doc = "URL path map of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "urlPathMaps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "urlPathMaps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub url_path_maps: Vec<ApplicationGatewayUrlPathMap>,
     #[doc = "Request routing rules of the application gateway resource."]
-    #[serde(rename = "requestRoutingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestRoutingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_routing_rules: Vec<ApplicationGatewayRequestRoutingRule>,
     #[doc = "Routing rules of the application gateway resource."]
-    #[serde(rename = "routingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "routingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routing_rules: Vec<ApplicationGatewayRoutingRule>,
     #[doc = "Rewrite rules for the application gateway resource."]
-    #[serde(rename = "rewriteRuleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rewriteRuleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rewrite_rule_sets: Vec<ApplicationGatewayRewriteRuleSet>,
     #[doc = "Redirect configurations of the application gateway resource. For default limits, see [Application Gateway limits](https://docs.microsoft.com/azure/azure-subscription-service-limits#application-gateway-limits)."]
-    #[serde(rename = "redirectConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "redirectConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub redirect_configurations: Vec<ApplicationGatewayRedirectConfiguration>,
     #[doc = "Application gateway web application firewall configuration."]
     #[serde(rename = "webApplicationFirewallConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -1651,10 +1870,20 @@ pub struct ApplicationGatewayPropertiesFormat {
     #[serde(rename = "autoscaleConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub autoscale_configuration: Option<ApplicationGatewayAutoscaleConfiguration>,
     #[doc = "PrivateLink configurations on application gateway."]
-    #[serde(rename = "privateLinkConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_configurations: Vec<ApplicationGatewayPrivateLinkConfiguration>,
     #[doc = "Private Endpoint connections on application gateway."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ApplicationGatewayPrivateEndpointConnection>,
     #[doc = "The resource GUID property of the application gateway resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -1663,13 +1892,23 @@ pub struct ApplicationGatewayPropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "Custom error configurations of the application gateway resource."]
-    #[serde(rename = "customErrorConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customErrorConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_error_configurations: Vec<ApplicationGatewayCustomError>,
     #[doc = "If true, associates a firewall policy with an application gateway regardless whether the policy differs from the WAF Config."]
     #[serde(rename = "forceFirewallPolicyAssociation", default, skip_serializing_if = "Option::is_none")]
     pub force_firewall_policy_association: Option<bool>,
     #[doc = "Load distribution policies of the application gateway resource."]
-    #[serde(rename = "loadDistributionPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadDistributionPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_distribution_policies: Vec<ApplicationGatewayLoadDistributionPolicy>,
     #[doc = "Application Gateway global configuration."]
     #[serde(rename = "globalConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -1807,13 +2046,28 @@ pub struct ApplicationGatewayRedirectConfigurationPropertiesFormat {
     #[serde(rename = "includeQueryString", default, skip_serializing_if = "Option::is_none")]
     pub include_query_string: Option<bool>,
     #[doc = "Request routing specifying redirect configuration."]
-    #[serde(rename = "requestRoutingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestRoutingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_routing_rules: Vec<SubResource>,
     #[doc = "Url path maps specifying default redirect configuration."]
-    #[serde(rename = "urlPathMaps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "urlPathMaps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub url_path_maps: Vec<SubResource>,
     #[doc = "Path rules specifying redirect configuration."]
-    #[serde(rename = "pathRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pathRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path_rules: Vec<SubResource>,
 }
 impl ApplicationGatewayRedirectConfigurationPropertiesFormat {
@@ -1933,7 +2187,11 @@ pub struct ApplicationGatewayRewriteRule {
     #[serde(rename = "ruleSequence", default, skip_serializing_if = "Option::is_none")]
     pub rule_sequence: Option<i64>,
     #[doc = "Conditions based on which the action set execution will be evaluated."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<ApplicationGatewayRewriteRuleCondition>,
     #[doc = "Set of actions in the Rewrite Rule in Application Gateway."]
     #[serde(rename = "actionSet", default, skip_serializing_if = "Option::is_none")]
@@ -1948,10 +2206,20 @@ impl ApplicationGatewayRewriteRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayRewriteRuleActionSet {
     #[doc = "Request Header Actions in the Action Set."]
-    #[serde(rename = "requestHeaderConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestHeaderConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_header_configurations: Vec<ApplicationGatewayHeaderConfiguration>,
     #[doc = "Response Header Actions in the Action Set."]
-    #[serde(rename = "responseHeaderConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "responseHeaderConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub response_header_configurations: Vec<ApplicationGatewayHeaderConfiguration>,
     #[doc = "Url configuration of the Actions set in Application Gateway."]
     #[serde(rename = "urlConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -2007,7 +2275,12 @@ impl ApplicationGatewayRewriteRuleSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewayRewriteRuleSetPropertiesFormat {
     #[doc = "Rewrite rules in the rewrite rule set."]
-    #[serde(rename = "rewriteRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rewriteRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rewrite_rules: Vec<ApplicationGatewayRewriteRule>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2284,7 +2557,12 @@ impl ApplicationGatewaySslCertificatePropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewaySslPolicy {
     #[doc = "Ssl protocols to be disabled on application gateway."]
-    #[serde(rename = "disabledSslProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledSslProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_ssl_protocols: Vec<ProtocolsEnum>,
     #[doc = "Type of Ssl Policy."]
     #[serde(rename = "policyType", default, skip_serializing_if = "Option::is_none")]
@@ -2293,7 +2571,12 @@ pub struct ApplicationGatewaySslPolicy {
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
     pub policy_name: Option<PolicyNameEnum>,
     #[doc = "Ssl cipher suites to be enabled in the specified order to application gateway."]
-    #[serde(rename = "cipherSuites", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cipherSuites",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cipher_suites: Vec<CipherSuitesEnum>,
     #[doc = "Ssl protocol enums."]
     #[serde(rename = "minProtocolVersion", default, skip_serializing_if = "Option::is_none")]
@@ -2365,7 +2648,12 @@ impl ApplicationGatewaySslPredefinedPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewaySslPredefinedPolicyPropertiesFormat {
     #[doc = "Ssl cipher suites to be enabled in the specified order for application gateway."]
-    #[serde(rename = "cipherSuites", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cipherSuites",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cipher_suites: Vec<CipherSuitesEnum>,
     #[doc = "Ssl protocol enums."]
     #[serde(rename = "minProtocolVersion", default, skip_serializing_if = "Option::is_none")]
@@ -2403,7 +2691,12 @@ impl ApplicationGatewaySslProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationGatewaySslProfilePropertiesFormat {
     #[doc = "Array of references to application gateway trusted client certificates."]
-    #[serde(rename = "trustedClientCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trustedClientCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub trusted_client_certificates: Vec<SubResource>,
     #[doc = "Application Gateway Ssl policy."]
     #[serde(rename = "sslPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -2565,7 +2858,12 @@ pub struct ApplicationGatewayUrlPathMapPropertiesFormat {
     #[serde(rename = "defaultLoadDistributionPolicy", default, skip_serializing_if = "Option::is_none")]
     pub default_load_distribution_policy: Option<SubResource>,
     #[doc = "Path rule of URL path map resource."]
-    #[serde(rename = "pathRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pathRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path_rules: Vec<ApplicationGatewayPathRule>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2591,7 +2889,12 @@ pub struct ApplicationGatewayWebApplicationFirewallConfiguration {
     #[serde(rename = "ruleSetVersion")]
     pub rule_set_version: String,
     #[doc = "The disabled rule groups."]
-    #[serde(rename = "disabledRuleGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledRuleGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_rule_groups: Vec<ApplicationGatewayFirewallDisabledRuleGroup>,
     #[doc = "Whether allow WAF to check request Body."]
     #[serde(rename = "requestBodyCheck", default, skip_serializing_if = "Option::is_none")]
@@ -2606,7 +2909,11 @@ pub struct ApplicationGatewayWebApplicationFirewallConfiguration {
     #[serde(rename = "fileUploadLimitInMb", default, skip_serializing_if = "Option::is_none")]
     pub file_upload_limit_in_mb: Option<i32>,
     #[doc = "The exclusion list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<ApplicationGatewayFirewallExclusion>,
 }
 impl ApplicationGatewayWebApplicationFirewallConfiguration {
@@ -2676,31 +2983,70 @@ pub struct ApplicationRule {
     #[serde(flatten)]
     pub firewall_policy_rule: FirewallPolicyRule,
     #[doc = "List of source IP addresses for this rule."]
-    #[serde(rename = "sourceAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_addresses: Vec<String>,
     #[doc = "List of destination IP addresses or Service Tags."]
-    #[serde(rename = "destinationAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_addresses: Vec<String>,
     #[doc = "Array of Application Protocols."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<FirewallPolicyRuleApplicationProtocol>,
     #[doc = "List of FQDNs for this rule."]
-    #[serde(rename = "targetFqdns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetFqdns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_fqdns: Vec<String>,
     #[doc = "List of Urls for this rule condition."]
-    #[serde(rename = "targetUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_urls: Vec<String>,
     #[doc = "List of FQDN Tags for this rule."]
-    #[serde(rename = "fqdnTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fqdnTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdn_tags: Vec<String>,
     #[doc = "List of source IpGroups for this rule."]
-    #[serde(rename = "sourceIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_groups: Vec<String>,
     #[doc = "Terminate TLS connections for this rule."]
     #[serde(rename = "terminateTLS", default, skip_serializing_if = "Option::is_none")]
     pub terminate_tls: Option<bool>,
     #[doc = "List of destination azure web categories."]
-    #[serde(rename = "webCategories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "webCategories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub web_categories: Vec<String>,
 }
 impl ApplicationRule {
@@ -2740,7 +3086,11 @@ impl ApplicationSecurityGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationSecurityGroupListResult {
     #[doc = "A list of application security groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationSecurityGroup>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2815,7 +3165,11 @@ impl Serialize for AuthenticationMethod {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationListResult {
     #[doc = "The authorizations in an ExpressRoute Circuit."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCircuitAuthorization>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2906,7 +3260,11 @@ impl AutoApprovedPrivateLinkService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AutoApprovedPrivateLinkServicesResult {
     #[doc = "An array of auto approved private link service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AutoApprovedPrivateLinkService>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2957,7 +3315,11 @@ pub struct AvailableDelegation {
     #[serde(rename = "serviceName", default, skip_serializing_if = "Option::is_none")]
     pub service_name: Option<String>,
     #[doc = "The actions permitted to the service upon delegation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
 }
 impl AvailableDelegation {
@@ -2969,7 +3331,11 @@ impl AvailableDelegation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableDelegationsResult {
     #[doc = "An array of available delegations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableDelegation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3014,7 +3380,11 @@ impl AvailablePrivateEndpointType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailablePrivateEndpointTypesResult {
     #[doc = "An array of available privateEndpoint type."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailablePrivateEndpointType>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3049,7 +3419,11 @@ pub struct AvailableProvidersListCity {
     #[serde(rename = "cityName", default, skip_serializing_if = "Option::is_none")]
     pub city_name: Option<String>,
     #[doc = "A list of Internet service providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub providers: Vec<String>,
 }
 impl AvailableProvidersListCity {
@@ -3064,10 +3438,18 @@ pub struct AvailableProvidersListCountry {
     #[serde(rename = "countryName", default, skip_serializing_if = "Option::is_none")]
     pub country_name: Option<String>,
     #[doc = "A list of Internet service providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub providers: Vec<String>,
     #[doc = "List of available states in the country."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub states: Vec<AvailableProvidersListState>,
 }
 impl AvailableProvidersListCountry {
@@ -3079,7 +3461,12 @@ impl AvailableProvidersListCountry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableProvidersListParameters {
     #[doc = "A list of Azure regions."]
-    #[serde(rename = "azureLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_locations: Vec<String>,
     #[doc = "The country for available providers list."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3103,10 +3490,18 @@ pub struct AvailableProvidersListState {
     #[serde(rename = "stateName", default, skip_serializing_if = "Option::is_none")]
     pub state_name: Option<String>,
     #[doc = "A list of Internet service providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub providers: Vec<String>,
     #[doc = "List of available cities or towns in the state."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cities: Vec<AvailableProvidersListCity>,
 }
 impl AvailableProvidersListState {
@@ -3139,7 +3534,11 @@ impl AvailableServiceAlias {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableServiceAliasesResult {
     #[doc = "An array of available service aliases."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableServiceAlias>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3222,7 +3621,11 @@ pub struct AzureFirewall {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<AzureFirewallPropertiesFormat>,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "A unique read-only string that changes whenever the resource is updated."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3251,19 +3654,43 @@ pub struct AzureFirewallApplicationRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of source IP addresses for this rule."]
-    #[serde(rename = "sourceAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_addresses: Vec<String>,
     #[doc = "Array of ApplicationRuleProtocols."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<AzureFirewallApplicationRuleProtocol>,
     #[doc = "List of FQDNs for this rule."]
-    #[serde(rename = "targetFqdns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetFqdns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_fqdns: Vec<String>,
     #[doc = "List of FQDN Tags for this rule."]
-    #[serde(rename = "fqdnTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fqdnTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdn_tags: Vec<String>,
     #[doc = "List of source IpGroups for this rule."]
-    #[serde(rename = "sourceIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_groups: Vec<String>,
 }
 impl AzureFirewallApplicationRule {
@@ -3301,7 +3728,11 @@ pub struct AzureFirewallApplicationRuleCollectionPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<AzureFirewallRcAction>,
     #[doc = "Collection of rules used by a application rule collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<AzureFirewallApplicationRule>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3387,7 +3818,11 @@ impl AzureFirewallFqdnTag {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureFirewallFqdnTagListResult {
     #[doc = "List of Azure Firewall FQDN Tags in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureFirewallFqdnTag>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3482,7 +3917,11 @@ impl AzureFirewallIpGroups {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureFirewallListResult {
     #[doc = "List of Azure Firewalls in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureFirewall>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3558,16 +3997,35 @@ pub struct AzureFirewallNatRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of source IP addresses for this rule."]
-    #[serde(rename = "sourceAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_addresses: Vec<String>,
     #[doc = "List of destination IP addresses for this rule. Supports IP ranges, prefixes, and service tags."]
-    #[serde(rename = "destinationAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_addresses: Vec<String>,
     #[doc = "List of destination ports."]
-    #[serde(rename = "destinationPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ports: Vec<String>,
     #[doc = "Array of AzureFirewallNetworkRuleProtocols applicable to this NAT rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<AzureFirewallNetworkRuleProtocol>,
     #[doc = "The translated address for this NAT rule."]
     #[serde(rename = "translatedAddress", default, skip_serializing_if = "Option::is_none")]
@@ -3579,7 +4037,12 @@ pub struct AzureFirewallNatRule {
     #[serde(rename = "translatedFqdn", default, skip_serializing_if = "Option::is_none")]
     pub translated_fqdn: Option<String>,
     #[doc = "List of source IpGroups for this rule."]
-    #[serde(rename = "sourceIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_groups: Vec<String>,
 }
 impl AzureFirewallNatRule {
@@ -3617,7 +4080,11 @@ pub struct AzureFirewallNatRuleCollectionProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<AzureFirewallNatRcAction>,
     #[doc = "Collection of rules used by a NAT rule collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<AzureFirewallNatRule>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3638,25 +4105,59 @@ pub struct AzureFirewallNetworkRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Array of AzureFirewallNetworkRuleProtocols."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocols: Vec<AzureFirewallNetworkRuleProtocol>,
     #[doc = "List of source IP addresses for this rule."]
-    #[serde(rename = "sourceAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_addresses: Vec<String>,
     #[doc = "List of destination IP addresses."]
-    #[serde(rename = "destinationAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_addresses: Vec<String>,
     #[doc = "List of destination ports."]
-    #[serde(rename = "destinationPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ports: Vec<String>,
     #[doc = "List of destination FQDNs."]
-    #[serde(rename = "destinationFqdns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationFqdns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_fqdns: Vec<String>,
     #[doc = "List of source IpGroups for this rule."]
-    #[serde(rename = "sourceIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_groups: Vec<String>,
     #[doc = "List of destination IpGroups for this rule."]
-    #[serde(rename = "destinationIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ip_groups: Vec<String>,
 }
 impl AzureFirewallNetworkRule {
@@ -3694,7 +4195,11 @@ pub struct AzureFirewallNetworkRuleCollectionPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<AzureFirewallRcAction>,
     #[doc = "Collection of rules used by a network rule collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<AzureFirewallNetworkRule>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3753,16 +4258,36 @@ impl Serialize for AzureFirewallNetworkRuleProtocol {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureFirewallPropertiesFormat {
     #[doc = "Collection of application rule collections used by Azure Firewall."]
-    #[serde(rename = "applicationRuleCollections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationRuleCollections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_rule_collections: Vec<AzureFirewallApplicationRuleCollection>,
     #[doc = "Collection of NAT rule collections used by Azure Firewall."]
-    #[serde(rename = "natRuleCollections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "natRuleCollections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nat_rule_collections: Vec<AzureFirewallNatRuleCollection>,
     #[doc = "Collection of network rule collections used by Azure Firewall."]
-    #[serde(rename = "networkRuleCollections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkRuleCollections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_rule_collections: Vec<AzureFirewallNetworkRuleCollection>,
     #[doc = "IP configuration of the Azure Firewall resource."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<AzureFirewallIpConfiguration>,
     #[doc = "IP configuration of an Azure Firewall."]
     #[serde(rename = "managementIpConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -4029,7 +4554,11 @@ pub struct AzureReachabilityReportItem {
     #[serde(rename = "azureLocation", default, skip_serializing_if = "Option::is_none")]
     pub azure_location: Option<String>,
     #[doc = "List of latency details for each of the time series."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub latencies: Vec<AzureReachabilityReportLatencyInfo>,
 }
 impl AzureReachabilityReportItem {
@@ -4080,10 +4609,19 @@ pub struct AzureReachabilityReportParameters {
     #[serde(rename = "providerLocation")]
     pub provider_location: AzureReachabilityReportLocation,
     #[doc = "List of Internet service providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub providers: Vec<String>,
     #[doc = "Optional Azure regions to scope the query to."]
-    #[serde(rename = "azureLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_locations: Vec<String>,
     #[doc = "The start time for the Azure reachability report."]
     #[serde(rename = "startTime", with = "azure_core::date::rfc3339")]
@@ -4135,7 +4673,11 @@ impl AzureWebCategory {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureWebCategoryListResult {
     #[doc = "List of Azure Web Categories for a given Subscription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureWebCategory>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4177,7 +4719,12 @@ pub struct BgpCommunity {
     #[serde(rename = "communityValue", default, skip_serializing_if = "Option::is_none")]
     pub community_value: Option<String>,
     #[doc = "The prefixes that the bgp community contains."]
-    #[serde(rename = "communityPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "communityPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub community_prefixes: Vec<String>,
     #[doc = "Customer is authorized to use bgp community or not."]
     #[serde(rename = "isAuthorizedToUse", default, skip_serializing_if = "Option::is_none")]
@@ -4195,7 +4742,12 @@ impl BgpCommunity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackendAddressInboundNatRulePortMappings {
     #[doc = "Collection of inbound NAT rule port mappings."]
-    #[serde(rename = "inboundNatRulePortMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatRulePortMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_rule_port_mappings: Vec<InboundNatRulePortMapping>,
 }
 impl BackendAddressInboundNatRulePortMappings {
@@ -4233,25 +4785,55 @@ pub struct BackendAddressPoolPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "An array of gateway load balancer tunnel interfaces."]
-    #[serde(rename = "tunnelInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tunnelInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tunnel_interfaces: Vec<GatewayLoadBalancerTunnelInterface>,
     #[doc = "An array of backend addresses."]
-    #[serde(rename = "loadBalancerBackendAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_addresses: Vec<LoadBalancerBackendAddress>,
     #[doc = "An array of references to IP addresses defined in network interfaces."]
-    #[serde(rename = "backendIPConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendIPConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_ip_configurations: Vec<NetworkInterfaceIpConfiguration>,
     #[doc = "An array of references to load balancing rules that use this backend address pool."]
-    #[serde(rename = "loadBalancingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_rules: Vec<SubResource>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "outboundRule", default, skip_serializing_if = "Option::is_none")]
     pub outbound_rule: Option<SubResource>,
     #[doc = "An array of references to outbound rules that use this backend address pool."]
-    #[serde(rename = "outboundRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outboundRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outbound_rules: Vec<SubResource>,
     #[doc = "An array of references to inbound NAT rules that use this backend address pool."]
-    #[serde(rename = "inboundNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_rules: Vec<SubResource>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -4353,7 +4935,11 @@ pub mod bastion_active_session {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BastionActiveSessionListResult {
     #[doc = "List of active sessions on the bastion."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BastionActiveSession>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4442,7 +5028,11 @@ impl BastionHostIpConfigurationPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BastionHostListResult {
     #[doc = "List of Bastion Hosts in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BastionHost>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4463,7 +5053,12 @@ impl BastionHostListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BastionHostPropertiesFormat {
     #[doc = "IP configuration of the Bastion Host resource."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<BastionHostIpConfiguration>,
     #[doc = "FQDN for the endpoint on which bastion host is accessible."]
     #[serde(rename = "dnsName", default, skip_serializing_if = "Option::is_none")]
@@ -4499,7 +5094,11 @@ impl BastionHostPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BastionSessionDeleteResult {
     #[doc = "List of sessions with their corresponding state."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BastionSessionState>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4563,7 +5162,11 @@ impl BastionShareableLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BastionShareableLinkListRequest {
     #[doc = "List of VM references."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vms: Vec<BastionShareableLink>,
 }
 impl BastionShareableLinkListRequest {
@@ -4575,7 +5178,11 @@ impl BastionShareableLinkListRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BastionShareableLinkListResult {
     #[doc = "List of Bastion Shareable Links for the request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BastionShareableLink>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4766,7 +5373,11 @@ pub mod bgp_peer_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BgpPeerStatusListResult {
     #[doc = "List of BGP peers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BgpPeerStatus>,
 }
 impl BgpPeerStatusListResult {
@@ -4792,7 +5403,11 @@ impl BgpServiceCommunity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BgpServiceCommunityListResult {
     #[doc = "A list of service community resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BgpServiceCommunity>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4816,7 +5431,12 @@ pub struct BgpServiceCommunityPropertiesFormat {
     #[serde(rename = "serviceName", default, skip_serializing_if = "Option::is_none")]
     pub service_name: Option<String>,
     #[doc = "A list of bgp communities."]
-    #[serde(rename = "bgpCommunities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bgpCommunities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bgp_communities: Vec<BgpCommunity>,
 }
 impl BgpServiceCommunityPropertiesFormat {
@@ -4837,7 +5457,12 @@ pub struct BgpSettings {
     #[serde(rename = "peerWeight", default, skip_serializing_if = "Option::is_none")]
     pub peer_weight: Option<i32>,
     #[doc = "BGP peering address with IP configuration ID for virtual network gateway."]
-    #[serde(rename = "bgpPeeringAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bgpPeeringAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bgp_peering_addresses: Vec<IpConfigurationBgpPeeringAddress>,
 }
 impl BgpSettings {
@@ -5112,7 +5737,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -5299,7 +5928,11 @@ pub struct ConnectionMonitorEndpointFilter {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<connection_monitor_endpoint_filter::Type>,
     #[doc = "List of items in the filter."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ConnectionMonitorEndpointFilterItem>,
 }
 impl ConnectionMonitorEndpointFilter {
@@ -5402,10 +6035,18 @@ pub mod connection_monitor_endpoint_filter_item {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionMonitorEndpointScope {
     #[doc = "List of items which needs to be included to the endpoint scope."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub include: Vec<ConnectionMonitorEndpointScopeItem>,
     #[doc = "List of items which needs to be excluded from the endpoint scope."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude: Vec<ConnectionMonitorEndpointScopeItem>,
 }
 impl ConnectionMonitorEndpointScope {
@@ -5438,10 +6079,20 @@ pub struct ConnectionMonitorHttpConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "The HTTP headers to transmit with the request."]
-    #[serde(rename = "requestHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_headers: Vec<HttpHeader>,
     #[doc = "HTTP status codes to consider successful. For instance, \"2xx,301-304,418\"."]
-    #[serde(rename = "validStatusCodeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validStatusCodeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub valid_status_code_ranges: Vec<String>,
     #[doc = "Value indicating whether HTTPS is preferred over HTTP in cases where the choice is not explicit."]
     #[serde(rename = "preferHTTPS", default, skip_serializing_if = "Option::is_none")]
@@ -5508,7 +6159,11 @@ impl ConnectionMonitorIcmpConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionMonitorListResult {
     #[doc = "Information about connection monitors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectionMonitorResult>,
 }
 impl azure_core::Continuable for ConnectionMonitorListResult {
@@ -5591,16 +6246,34 @@ pub struct ConnectionMonitorParameters {
     #[serde(rename = "monitoringIntervalInSeconds", default, skip_serializing_if = "Option::is_none")]
     pub monitoring_interval_in_seconds: Option<i32>,
     #[doc = "List of connection monitor endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<ConnectionMonitorEndpoint>,
     #[doc = "List of connection monitor test configurations."]
-    #[serde(rename = "testConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "testConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub test_configurations: Vec<ConnectionMonitorTestConfiguration>,
     #[doc = "List of connection monitor test groups."]
-    #[serde(rename = "testGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "testGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub test_groups: Vec<ConnectionMonitorTestGroup>,
     #[doc = "List of connection monitor outputs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<ConnectionMonitorOutput>,
     #[doc = "Optional notes to be associated with the connection monitor."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5618,7 +6291,11 @@ pub struct ConnectionMonitorQueryResult {
     #[serde(rename = "sourceStatus", default, skip_serializing_if = "Option::is_none")]
     pub source_status: Option<connection_monitor_query_result::SourceStatus>,
     #[doc = "Information about connection states."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub states: Vec<ConnectionStateSnapshot>,
 }
 impl ConnectionMonitorQueryResult {
@@ -6107,7 +6784,11 @@ pub struct ConnectionStateSnapshot {
     #[serde(rename = "probesFailed", default, skip_serializing_if = "Option::is_none")]
     pub probes_failed: Option<i64>,
     #[doc = "List of hops between the source and the destination."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hops: Vec<ConnectivityHop>,
 }
 impl ConnectionStateSnapshot {
@@ -6230,19 +6911,42 @@ pub struct ConnectivityHop {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "List of next hop identifiers."]
-    #[serde(rename = "nextHopIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nextHopIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub next_hop_ids: Vec<String>,
     #[doc = "List of previous hop identifiers."]
-    #[serde(rename = "previousHopIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "previousHopIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub previous_hop_ids: Vec<String>,
     #[doc = "List of hop links."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<HopLink>,
     #[doc = "List of previous hop links."]
-    #[serde(rename = "previousLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "previousLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub previous_links: Vec<HopLink>,
     #[doc = "List of issues."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issues: Vec<ConnectivityIssue>,
 }
 impl ConnectivityHop {
@@ -6254,7 +6958,11 @@ impl ConnectivityHop {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectivityInformation {
     #[doc = "List of hops between the source and the destination."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hops: Vec<ConnectivityHop>,
     #[doc = "The connection status."]
     #[serde(rename = "connectionStatus", default, skip_serializing_if = "Option::is_none")]
@@ -6337,7 +7045,11 @@ pub struct ConnectivityIssue {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<connectivity_issue::Type>,
     #[doc = "Provides additional context on the issue."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub context: Vec<IssueContext>,
 }
 impl ConnectivityIssue {
@@ -6623,10 +7335,20 @@ impl ContainerNetworkInterfaceConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContainerNetworkInterfaceConfigurationPropertiesFormat {
     #[doc = "A list of ip configurations of the container network interface configuration."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<IpConfigurationProfile>,
     #[doc = "A list of container network interfaces created from this container network interface configuration."]
-    #[serde(rename = "containerNetworkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerNetworkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_network_interfaces: Vec<SubResource>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -6684,7 +7406,12 @@ pub struct ContainerNetworkInterfacePropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub container: Option<Container>,
     #[doc = "Reference to the ip configuration on this container nic."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<ContainerNetworkInterfaceIpConfiguration>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -6702,7 +7429,12 @@ pub struct CustomDnsConfigPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub fqdn: Option<String>,
     #[doc = "A list of private ip addresses of the private endpoint."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
 }
 impl CustomDnsConfigPropertiesFormat {
@@ -6725,7 +7457,11 @@ pub struct CustomIpPrefix {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "A list of availability zones denoting the IP allocated for the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl CustomIpPrefix {
@@ -6737,7 +7473,11 @@ impl CustomIpPrefix {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomIpPrefixListResult {
     #[doc = "A list of Custom IP prefixes that exists in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomIpPrefix>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6770,13 +7510,23 @@ pub struct CustomIpPrefixPropertiesFormat {
     #[serde(rename = "customIpPrefixParent", default, skip_serializing_if = "Option::is_none")]
     pub custom_ip_prefix_parent: Option<SubResource>,
     #[doc = "The list of all Children for IPv6 /48 CustomIpPrefix."]
-    #[serde(rename = "childCustomIpPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childCustomIpPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_custom_ip_prefixes: Vec<SubResource>,
     #[doc = "The commissioned state of the Custom IP Prefix."]
     #[serde(rename = "commissionedState", default, skip_serializing_if = "Option::is_none")]
     pub commissioned_state: Option<custom_ip_prefix_properties_format::CommissionedState>,
     #[doc = "The list of all referenced PublicIpPrefixes."]
-    #[serde(rename = "publicIpPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIpPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_prefixes: Vec<SubResource>,
     #[doc = "The resource GUID property of the custom IP prefix resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -6868,10 +7618,20 @@ pub struct DdosCustomPolicyPropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "The list of public IPs associated with the DDoS custom policy resource. This list is read-only."]
-    #[serde(rename = "publicIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<SubResource>,
     #[doc = "The protocol-specific DDoS policy customization parameters."]
-    #[serde(rename = "protocolCustomSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protocolCustomSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protocol_custom_settings: Vec<ProtocolCustomSettingsFormat>,
 }
 impl DdosCustomPolicyPropertiesFormat {
@@ -6913,7 +7673,11 @@ impl DdosProtectionPlan {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DdosProtectionPlanListResult {
     #[doc = "A list of DDoS protection plans."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DdosProtectionPlan>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6940,7 +7704,12 @@ pub struct DdosProtectionPlanPropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "The list of virtual networks associated with the DDoS protection plan resource. This list is read-only."]
-    #[serde(rename = "virtualNetworks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_networks: Vec<SubResource>,
 }
 impl DdosProtectionPlanPropertiesFormat {
@@ -7107,7 +7876,12 @@ impl Serialize for DhGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DhcpOptions {
     #[doc = "The list of DNS servers IP addresses."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
 }
 impl DhcpOptions {
@@ -7186,7 +7960,11 @@ impl DnsNameAvailabilityResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DnsSettings {
     #[doc = "List of Custom DNS Servers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub servers: Vec<String>,
     #[doc = "Enable DNS Proxy on Firewalls attached to the Firewall Policy."]
     #[serde(rename = "enableProxy", default, skip_serializing_if = "Option::is_none")]
@@ -7221,7 +7999,11 @@ impl DscpConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscpConfigurationListResult {
     #[doc = "A list of dscp configurations in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DscpConfiguration>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7242,31 +8024,65 @@ impl DscpConfigurationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DscpConfigurationPropertiesFormat {
     #[doc = "List of markings to be used in the configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub markings: Vec<i32>,
     #[doc = "Source IP ranges."]
-    #[serde(rename = "sourceIpRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_ranges: Vec<QosIpRange>,
     #[doc = "Destination IP ranges."]
-    #[serde(rename = "destinationIpRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationIpRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ip_ranges: Vec<QosIpRange>,
     #[doc = "Sources port ranges."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<QosPortRange>,
     #[doc = "Destination port ranges."]
-    #[serde(rename = "destinationPortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_port_ranges: Vec<QosPortRange>,
     #[doc = "RNM supported protocol types."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub protocol: Option<dscp_configuration_properties_format::Protocol>,
     #[doc = "QoS object definitions"]
-    #[serde(rename = "qosDefinitionCollection", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "qosDefinitionCollection",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub qos_definition_collection: Vec<QosDefinition>,
     #[doc = "Qos Collection ID generated by RNM."]
     #[serde(rename = "qosCollectionId", default, skip_serializing_if = "Option::is_none")]
     pub qos_collection_id: Option<String>,
     #[doc = "Associated Network Interfaces to the DSCP Configuration."]
-    #[serde(rename = "associatedNetworkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "associatedNetworkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub associated_network_interfaces: Vec<NetworkInterface>,
     #[doc = "The resource GUID property of the DSCP Configuration resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -7344,7 +8160,12 @@ pub struct EffectiveNetworkSecurityGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub association: Option<EffectiveNetworkSecurityGroupAssociation>,
     #[doc = "A collection of effective security rules."]
-    #[serde(rename = "effectiveSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_security_rules: Vec<EffectiveNetworkSecurityRule>,
     #[doc = "Mapping of tags to list of IP Addresses included within the tag."]
     #[serde(rename = "tagMap", default, skip_serializing_if = "Option::is_none")]
@@ -7377,7 +8198,11 @@ impl EffectiveNetworkSecurityGroupAssociation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EffectiveNetworkSecurityGroupListResult {
     #[doc = "A list of effective network security groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EffectiveNetworkSecurityGroup>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7404,10 +8229,20 @@ pub struct EffectiveNetworkSecurityRule {
     #[serde(rename = "destinationPortRange", default, skip_serializing_if = "Option::is_none")]
     pub destination_port_range: Option<String>,
     #[doc = "The source port ranges. Expected values include a single integer between 0 and 65535, a range using '-' as separator (e.g. 100-400), or an asterisk (*)."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
     #[doc = "The destination port ranges. Expected values include a single integer between 0 and 65535, a range using '-' as separator (e.g. 100-400), or an asterisk (*)."]
-    #[serde(rename = "destinationPortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_port_ranges: Vec<String>,
     #[doc = "The source address prefix."]
     #[serde(rename = "sourceAddressPrefix", default, skip_serializing_if = "Option::is_none")]
@@ -7416,16 +8251,36 @@ pub struct EffectiveNetworkSecurityRule {
     #[serde(rename = "destinationAddressPrefix", default, skip_serializing_if = "Option::is_none")]
     pub destination_address_prefix: Option<String>,
     #[doc = "The source address prefixes. Expected values include CIDR IP ranges, Default Tags (VirtualNetwork, AzureLoadBalancer, Internet), System Tags, and the asterisk (*)."]
-    #[serde(rename = "sourceAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_address_prefixes: Vec<String>,
     #[doc = "The destination address prefixes. Expected values include CIDR IP ranges, Default Tags (VirtualNetwork, AzureLoadBalancer, Internet), System Tags, and the asterisk (*)."]
-    #[serde(rename = "destinationAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_address_prefixes: Vec<String>,
     #[doc = "The expanded source address prefix."]
-    #[serde(rename = "expandedSourceAddressPrefix", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "expandedSourceAddressPrefix",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub expanded_source_address_prefix: Vec<String>,
     #[doc = "Expanded destination address prefix."]
-    #[serde(rename = "expandedDestinationAddressPrefix", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "expandedDestinationAddressPrefix",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub expanded_destination_address_prefix: Vec<String>,
     #[doc = "Whether network traffic is allowed or denied."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7500,10 +8355,20 @@ pub struct EffectiveRoute {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<effective_route::State>,
     #[doc = "The address prefixes of the effective routes in CIDR notation."]
-    #[serde(rename = "addressPrefix", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefix",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefix: Vec<String>,
     #[doc = "The IP address of the next hop of the effective route."]
-    #[serde(rename = "nextHopIpAddress", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nextHopIpAddress",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub next_hop_ip_address: Vec<String>,
     #[doc = "The type of Azure hop the packet should be sent to."]
     #[serde(rename = "nextHopType", default, skip_serializing_if = "Option::is_none")]
@@ -7599,7 +8464,11 @@ pub mod effective_route {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EffectiveRouteListResult {
     #[doc = "A list of effective routes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EffectiveRoute>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7646,7 +8515,11 @@ impl EndpointServiceResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EndpointServicesListResult {
     #[doc = "List of available endpoint services in a region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EndpointServiceResult>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7676,7 +8549,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetails>,
     #[doc = "Inner error message."]
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
@@ -7742,7 +8619,12 @@ pub struct EvaluatedNetworkSecurityGroup {
     #[serde(rename = "matchedRule", default, skip_serializing_if = "Option::is_none")]
     pub matched_rule: Option<MatchedRule>,
     #[doc = "List of network security rules evaluation results."]
-    #[serde(rename = "rulesEvaluationResult", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rulesEvaluationResult",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules_evaluation_result: Vec<NetworkSecurityRulesEvaluationResult>,
 }
 impl EvaluatedNetworkSecurityGroup {
@@ -7769,7 +8651,11 @@ pub struct ExclusionManagedRuleGroup {
     #[serde(rename = "ruleGroupName")]
     pub rule_group_name: String,
     #[doc = "List of rules that will be excluded. If none specified, all rules in the group will be excluded."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ExclusionManagedRule>,
 }
 impl ExclusionManagedRuleGroup {
@@ -7790,7 +8676,12 @@ pub struct ExclusionManagedRuleSet {
     #[serde(rename = "ruleSetVersion")]
     pub rule_set_version: String,
     #[doc = "Defines the rule groups to apply to the rule set."]
-    #[serde(rename = "ruleGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_groups: Vec<ExclusionManagedRuleGroup>,
 }
 impl ExclusionManagedRuleSet {
@@ -7917,7 +8808,11 @@ impl ExpressRouteCircuitConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCircuitConnectionListResult {
     #[doc = "The global reach connection associated with Private Peering in an ExpressRoute Circuit."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCircuitConnection>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7968,7 +8863,11 @@ impl ExpressRouteCircuitConnectionPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCircuitListResult {
     #[doc = "A list of ExpressRouteCircuits in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCircuit>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8012,10 +8911,20 @@ impl ExpressRouteCircuitPeering {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCircuitPeeringConfig {
     #[doc = "The reference to AdvertisedPublicPrefixes."]
-    #[serde(rename = "advertisedPublicPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "advertisedPublicPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub advertised_public_prefixes: Vec<String>,
     #[doc = "The communities of bgp peering. Specified for microsoft peering."]
-    #[serde(rename = "advertisedCommunities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "advertisedCommunities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub advertised_communities: Vec<String>,
     #[doc = "The advertised public prefix state of the Peering resource."]
     #[serde(rename = "advertisedPublicPrefixesState", default, skip_serializing_if = "Option::is_none")]
@@ -8095,7 +9004,11 @@ impl ExpressRouteCircuitPeeringId {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCircuitPeeringListResult {
     #[doc = "The peerings in an express route circuit."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCircuitPeering>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8170,10 +9083,19 @@ pub struct ExpressRouteCircuitPeeringPropertiesFormat {
     #[serde(rename = "expressRouteConnection", default, skip_serializing_if = "Option::is_none")]
     pub express_route_connection: Option<ExpressRouteConnectionId>,
     #[doc = "The list of circuit connections associated with Azure Private Peering for this circuit."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connections: Vec<ExpressRouteCircuitConnection>,
     #[doc = "The list of peered circuit connections associated with Azure Private Peering for this circuit."]
-    #[serde(rename = "peeredConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeredConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peered_connections: Vec<PeerExpressRouteCircuitConnection>,
 }
 impl ExpressRouteCircuitPeeringPropertiesFormat {
@@ -8194,10 +9116,18 @@ pub struct ExpressRouteCircuitPropertiesFormat {
     #[serde(rename = "serviceProviderProvisioningState", default, skip_serializing_if = "Option::is_none")]
     pub service_provider_provisioning_state: Option<ServiceProviderProvisioningState>,
     #[doc = "The list of authorizations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<ExpressRouteCircuitAuthorization>,
     #[doc = "The list of peerings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peerings: Vec<ExpressRouteCircuitPeering>,
     #[doc = "The ServiceKey."]
     #[serde(rename = "serviceKey", default, skip_serializing_if = "Option::is_none")]
@@ -8437,7 +9367,11 @@ impl ExpressRouteCircuitStats {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCircuitsArpTableListResult {
     #[doc = "A list of the ARP tables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCircuitArpTable>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8452,7 +9386,11 @@ impl ExpressRouteCircuitsArpTableListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCircuitsRoutesTableListResult {
     #[doc = "The list of routes table."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCircuitRoutesTable>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8467,7 +9405,11 @@ impl ExpressRouteCircuitsRoutesTableListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCircuitsRoutesTableSummaryListResult {
     #[doc = "A list of the routes table."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCircuitRoutesTableSummary>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8514,7 +9456,11 @@ impl ExpressRouteConnectionId {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteConnectionList {
     #[doc = "The list of ExpressRoute connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteConnection>,
 }
 impl ExpressRouteConnectionList {
@@ -8581,7 +9527,11 @@ impl ExpressRouteCrossConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCrossConnectionListResult {
     #[doc = "A list of ExpressRouteCrossConnection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCrossConnection>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8622,7 +9572,11 @@ impl ExpressRouteCrossConnectionPeering {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCrossConnectionPeeringList {
     #[doc = "The peerings in an express route cross connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCrossConnectionPeering>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8724,7 +9678,11 @@ pub struct ExpressRouteCrossConnectionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "The list of peerings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peerings: Vec<ExpressRouteCrossConnectionPeering>,
 }
 impl ExpressRouteCrossConnectionProperties {
@@ -8757,7 +9715,11 @@ impl ExpressRouteCrossConnectionRoutesTableSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteCrossConnectionsRoutesTableSummaryListResult {
     #[doc = "A list of the routes table."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteCrossConnectionRoutesTableSummary>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8789,7 +9751,11 @@ impl ExpressRouteGateway {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteGatewayList {
     #[doc = "List of ExpressRoute gateways."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteGateway>,
 }
 impl ExpressRouteGatewayList {
@@ -8804,7 +9770,12 @@ pub struct ExpressRouteGatewayProperties {
     #[serde(rename = "autoScaleConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub auto_scale_configuration: Option<express_route_gateway_properties::AutoScaleConfiguration>,
     #[doc = "List of ExpressRoute connections to the ExpressRoute gateway."]
-    #[serde(rename = "expressRouteConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "expressRouteConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub express_route_connections: Vec<ExpressRouteConnection>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -8880,7 +9851,11 @@ impl ExpressRouteLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteLinkListResult {
     #[doc = "The list of ExpressRouteLink sub-resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteLink>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9234,7 +10209,11 @@ impl ExpressRoutePortAuthorization {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRoutePortAuthorizationListResult {
     #[doc = "The authorizations in an ExpressRoute Port."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRoutePortAuthorization>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9316,7 +10295,11 @@ pub mod express_route_port_authorization_properties_format {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRoutePortListResult {
     #[doc = "A list of ExpressRoutePort resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRoutePort>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9358,10 +10341,18 @@ pub struct ExpressRoutePortPropertiesFormat {
     #[serde(rename = "allocationDate", default, skip_serializing_if = "Option::is_none")]
     pub allocation_date: Option<String>,
     #[doc = "The set of physical links of the ExpressRoutePort resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<ExpressRouteLink>,
     #[doc = "Reference the ExpressRoute circuit(s) that are provisioned on this ExpressRoutePort resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub circuits: Vec<SubResource>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -9448,7 +10439,11 @@ impl ExpressRoutePortsLocationBandwidths {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRoutePortsLocationListResult {
     #[doc = "The list of all ExpressRoutePort peering locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRoutePortsLocation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9475,7 +10470,12 @@ pub struct ExpressRoutePortsLocationPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub contact: Option<String>,
     #[doc = "The inventory of available ExpressRoutePort bandwidths."]
-    #[serde(rename = "availableBandwidths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableBandwidths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_bandwidths: Vec<ExpressRoutePortsLocationBandwidths>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -9519,7 +10519,11 @@ impl ExpressRouteServiceProviderBandwidthsOffered {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteServiceProviderListResult {
     #[doc = "A list of ExpressRouteResourceProvider resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteServiceProvider>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9540,10 +10544,20 @@ impl ExpressRouteServiceProviderListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteServiceProviderPropertiesFormat {
     #[doc = "A list of peering locations."]
-    #[serde(rename = "peeringLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeringLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peering_locations: Vec<String>,
     #[doc = "A list of bandwidths offered."]
-    #[serde(rename = "bandwidthsOffered", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bandwidthsOffered",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bandwidths_offered: Vec<ExpressRouteServiceProviderBandwidthsOffered>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -9611,7 +10625,11 @@ pub struct FilterItems {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub field: Option<String>,
     #[doc = "List of values to filter the current field by"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl FilterItems {
@@ -9664,7 +10682,11 @@ pub struct FirewallPolicyFilterRuleCollection {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<FirewallPolicyFilterRuleCollectionAction>,
     #[doc = "List of rules included in a rule collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<FirewallPolicyRule>,
 }
 impl FirewallPolicyFilterRuleCollection {
@@ -9816,19 +10838,44 @@ pub struct FirewallPolicyIntrusionDetectionBypassTrafficSpecifications {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub protocol: Option<FirewallPolicyIntrusionDetectionBypassTrafficProtocol>,
     #[doc = "List of source IP addresses or ranges for this rule."]
-    #[serde(rename = "sourceAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_addresses: Vec<String>,
     #[doc = "List of destination IP addresses or ranges for this rule."]
-    #[serde(rename = "destinationAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_addresses: Vec<String>,
     #[doc = "List of destination ports or ranges."]
-    #[serde(rename = "destinationPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ports: Vec<String>,
     #[doc = "List of source IpGroups for this rule."]
-    #[serde(rename = "sourceIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_groups: Vec<String>,
     #[doc = "List of destination IpGroups for this rule."]
-    #[serde(rename = "destinationIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ip_groups: Vec<String>,
 }
 impl FirewallPolicyIntrusionDetectionBypassTrafficSpecifications {
@@ -9840,13 +10887,28 @@ impl FirewallPolicyIntrusionDetectionBypassTrafficSpecifications {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallPolicyIntrusionDetectionConfiguration {
     #[doc = "List of specific signatures states."]
-    #[serde(rename = "signatureOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "signatureOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub signature_overrides: Vec<FirewallPolicyIntrusionDetectionSignatureSpecification>,
     #[doc = "List of rules for traffic to bypass."]
-    #[serde(rename = "bypassTrafficSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bypassTrafficSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bypass_traffic_settings: Vec<FirewallPolicyIntrusionDetectionBypassTrafficSpecifications>,
     #[doc = "IDPS Private IP address ranges are used to identify traffic direction (i.e. inbound, outbound, etc.). By default, only ranges defined by IANA RFC 1918 are considered private IP addresses. To modify default ranges, specify your Private IP address ranges with this property"]
-    #[serde(rename = "privateRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ranges: Vec<String>,
 }
 impl FirewallPolicyIntrusionDetectionConfiguration {
@@ -9912,7 +10974,11 @@ impl Serialize for FirewallPolicyIntrusionDetectionStateOptions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallPolicyListResult {
     #[doc = "List of Firewall Policies in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallPolicy>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9933,7 +10999,11 @@ impl FirewallPolicyListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallPolicyLogAnalyticsResources {
     #[doc = "List of workspaces for Firewall Policy Insights."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub workspaces: Vec<FirewallPolicyLogAnalyticsWorkspace>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "defaultWorkspaceId", default, skip_serializing_if = "Option::is_none")]
@@ -9968,7 +11038,11 @@ pub struct FirewallPolicyNatRuleCollection {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub action: Option<FirewallPolicyNatRuleCollectionAction>,
     #[doc = "List of rules included in a rule collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<FirewallPolicyRule>,
 }
 impl FirewallPolicyNatRuleCollection {
@@ -10032,7 +11106,12 @@ impl Serialize for FirewallPolicyNatRuleCollectionActionType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallPolicyPropertiesFormat {
     #[doc = "List of references to FirewallPolicyRuleCollectionGroups."]
-    #[serde(rename = "ruleCollectionGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleCollectionGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_collection_groups: Vec<SubResource>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -10041,10 +11120,19 @@ pub struct FirewallPolicyPropertiesFormat {
     #[serde(rename = "basePolicy", default, skip_serializing_if = "Option::is_none")]
     pub base_policy: Option<SubResource>,
     #[doc = "List of references to Azure Firewalls that this Firewall Policy is associated with."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewalls: Vec<SubResource>,
     #[doc = "List of references to Child Firewall Policies."]
-    #[serde(rename = "childPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_policies: Vec<SubResource>,
     #[doc = "The operation mode for Threat Intel."]
     #[serde(rename = "threatIntelMode", default, skip_serializing_if = "Option::is_none")]
@@ -10291,7 +11379,11 @@ impl FirewallPolicyRuleCollectionGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallPolicyRuleCollectionGroupListResult {
     #[doc = "List of FirewallPolicyRuleCollectionGroups in a FirewallPolicy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallPolicyRuleCollectionGroup>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10315,7 +11407,12 @@ pub struct FirewallPolicyRuleCollectionGroupProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub priority: Option<i32>,
     #[doc = "Group of Firewall Policy rule collections."]
-    #[serde(rename = "ruleCollections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleCollections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_collections: Vec<FirewallPolicyRuleCollection>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -10374,7 +11471,12 @@ impl Serialize for FirewallPolicyRuleNetworkProtocol {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallPolicySnat {
     #[doc = "List of private IP addresses/IP address ranges to not be SNAT."]
-    #[serde(rename = "privateRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ranges: Vec<String>,
 }
 impl FirewallPolicySnat {
@@ -10452,10 +11554,19 @@ pub mod firewall_policy_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallPolicyThreatIntelWhitelist {
     #[doc = "List of IP addresses for the ThreatIntel Whitelist."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "List of FQDNs for the ThreatIntel Whitelist."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdns: Vec<String>,
 }
 impl FirewallPolicyThreatIntelWhitelist {
@@ -10571,7 +11682,11 @@ impl FlowLogInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FlowLogListResult {
     #[doc = "Information about flow log resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FlowLog>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10685,7 +11800,11 @@ pub struct FrontendIpConfiguration {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "A list of availability zones denoting the IP allocated for the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl FrontendIpConfiguration {
@@ -10697,16 +11816,36 @@ impl FrontendIpConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FrontendIpConfigurationPropertiesFormat {
     #[doc = "An array of references to inbound rules that use this frontend IP."]
-    #[serde(rename = "inboundNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_rules: Vec<SubResource>,
     #[doc = "An array of references to inbound pools that use this frontend IP."]
-    #[serde(rename = "inboundNatPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_pools: Vec<SubResource>,
     #[doc = "An array of references to outbound rules that use this frontend IP."]
-    #[serde(rename = "outboundRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outboundRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outbound_rules: Vec<SubResource>,
     #[doc = "An array of references to load balancing rules that use this frontend IP."]
-    #[serde(rename = "loadBalancingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_rules: Vec<SubResource>,
     #[doc = "The private IP address of the IP configuration."]
     #[serde(rename = "privateIPAddress", default, skip_serializing_if = "Option::is_none")]
@@ -10893,7 +12032,11 @@ impl GatewayRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayRouteListResult {
     #[doc = "List of gateway routes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayRoute>,
 }
 impl GatewayRouteListResult {
@@ -10929,7 +12072,12 @@ impl GenerateExpressRoutePortsLoaResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct GetVpnSitesConfigurationRequest {
     #[doc = "List of resource-ids of the vpn-sites for which config is to be downloaded."]
-    #[serde(rename = "vpnSites", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnSites",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_sites: Vec<String>,
     #[doc = "The sas-url to download the configurations for vpn-sites."]
     #[serde(rename = "outputBlobSasUrl")]
@@ -10950,10 +12098,19 @@ pub struct HttpConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub method: Option<http_configuration::Method>,
     #[doc = "List of HTTP headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<HttpHeader>,
     #[doc = "Valid status codes."]
-    #[serde(rename = "validStatusCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validStatusCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub valid_status_codes: Vec<i32>,
 }
 impl HttpConfiguration {
@@ -11027,7 +12184,11 @@ pub struct HopLink {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<HopLinkProperties>,
     #[doc = "List of issues."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issues: Vec<ConnectivityIssue>,
     #[doc = "Provides additional context on links."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11125,7 +12286,11 @@ impl HubIpConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HubPublicIpAddresses {
     #[doc = "The list of Public IP addresses associated with azure firewall or IP addresses to be retained."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub addresses: Vec<AzureFirewallPublicIpAddress>,
     #[doc = "The number of Public IP addresses associated with azure firewall."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11191,16 +12356,34 @@ impl HubRouteTable {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HubRouteTableProperties {
     #[doc = "List of all routes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<HubRoute>,
     #[doc = "List of labels associated with this route table."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "List of all connections associated with this route table."]
-    #[serde(rename = "associatedConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "associatedConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub associated_connections: Vec<String>,
     #[doc = "List of all connections that advertise to this route table."]
-    #[serde(rename = "propagatingConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propagatingConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub propagating_connections: Vec<String>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -11370,7 +12553,12 @@ pub struct IpAddressAvailabilityResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub available: Option<bool>,
     #[doc = "Contains other available private IP addresses if the asked for address is taken."]
-    #[serde(rename = "availableIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_ip_addresses: Vec<String>,
     #[doc = "Private IP address platform reserved."]
     #[serde(rename = "isPlatformReserved", default, skip_serializing_if = "Option::is_none")]
@@ -11445,13 +12633,28 @@ pub struct IpConfigurationBgpPeeringAddress {
     #[serde(rename = "ipconfigurationId", default, skip_serializing_if = "Option::is_none")]
     pub ipconfiguration_id: Option<String>,
     #[doc = "The list of default BGP peering addresses which belong to IP configuration."]
-    #[serde(rename = "defaultBgpIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultBgpIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_bgp_ip_addresses: Vec<String>,
     #[doc = "The list of custom BGP peering addresses which belong to IP configuration."]
-    #[serde(rename = "customBgpIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customBgpIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_bgp_ip_addresses: Vec<String>,
     #[doc = "The list of tunnel public IP addresses which belong to IP configuration."]
-    #[serde(rename = "tunnelIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tunnelIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tunnel_ip_addresses: Vec<String>,
 }
 impl IpConfigurationBgpPeeringAddress {
@@ -11758,7 +12961,11 @@ impl InboundNatRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InboundNatRuleListResult {
     #[doc = "A list of inbound NAT rules in a load balancer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InboundNatRule>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11868,7 +13075,11 @@ impl InboundSecurityRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InboundSecurityRuleProperties {
     #[doc = "List of allowed rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<InboundSecurityRules>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -11960,7 +13171,11 @@ impl IpAllocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IpAllocationListResult {
     #[doc = "A list of IpAllocation resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IpAllocation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12068,7 +13283,11 @@ impl IpGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IpGroupListResult {
     #[doc = "The list of IpGroups information resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IpGroup>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12092,13 +13311,27 @@ pub struct IpGroupPropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "IpAddresses/IpAddressPrefixes in the IpGroups resource."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "List of references to Firewall resources that this IpGroups is associated with."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewalls: Vec<SubResource>,
     #[doc = "List of references to Firewall Policies resources that this IpGroups is associated with."]
-    #[serde(rename = "firewallPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "firewallPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub firewall_policies: Vec<SubResource>,
 }
 impl IpGroupPropertiesFormat {
@@ -12374,7 +13607,11 @@ impl IssueContext {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListHubRouteTablesResult {
     #[doc = "List of RouteTables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HubRouteTable>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12395,7 +13632,11 @@ impl ListHubRouteTablesResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListHubVirtualNetworkConnectionsResult {
     #[doc = "List of HubVirtualNetworkConnections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HubVirtualNetworkConnection>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12416,7 +13657,11 @@ impl ListHubVirtualNetworkConnectionsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListP2sVpnGatewaysResult {
     #[doc = "List of P2SVpnGateways."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<P2sVpnGateway>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12437,7 +13682,11 @@ impl ListP2sVpnGatewaysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListRoutingIntentResult {
     #[doc = "List of RoutingIntent resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoutingIntent>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12458,7 +13707,11 @@ impl ListRoutingIntentResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVirtualHubBgpConnectionResults {
     #[doc = "The list of VirtualHubBgpConnections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BgpConnection>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12479,7 +13732,11 @@ impl ListVirtualHubBgpConnectionResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVirtualHubIpConfigurationResults {
     #[doc = "The list of VirtualHubIpConfigurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HubIpConfiguration>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12500,7 +13757,11 @@ impl ListVirtualHubIpConfigurationResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVirtualHubRouteTableV2sResult {
     #[doc = "List of VirtualHubRouteTableV2s."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualHubRouteTableV2>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12521,7 +13782,11 @@ impl ListVirtualHubRouteTableV2sResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVirtualHubsResult {
     #[doc = "List of VirtualHubs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualHub>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12542,7 +13807,11 @@ impl ListVirtualHubsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVirtualNetworkGatewayNatRulesResult {
     #[doc = "List of Nat Rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkGatewayNatRule>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12563,7 +13832,11 @@ impl ListVirtualNetworkGatewayNatRulesResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVirtualWaNsResult {
     #[doc = "List of VirtualWANs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualWan>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12584,7 +13857,11 @@ impl ListVirtualWaNsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVpnConnectionsResult {
     #[doc = "List of Vpn Connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnConnection>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12605,7 +13882,11 @@ impl ListVpnConnectionsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVpnGatewayNatRulesResult {
     #[doc = "List of Nat Rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnGatewayNatRule>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12626,7 +13907,11 @@ impl ListVpnGatewayNatRulesResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVpnGatewaysResult {
     #[doc = "List of VpnGateways."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnGateway>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12647,7 +13932,11 @@ impl ListVpnGatewaysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVpnServerConfigurationPolicyGroupsResult {
     #[doc = "List of VpnServerConfigurationPolicyGroups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnServerConfigurationPolicyGroup>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12668,7 +13957,11 @@ impl ListVpnServerConfigurationPolicyGroupsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVpnServerConfigurationsResult {
     #[doc = "List of VpnServerConfigurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnServerConfiguration>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12689,7 +13982,11 @@ impl ListVpnServerConfigurationsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVpnSiteLinkConnectionsResult {
     #[doc = "List of VpnSiteLinkConnections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnSiteLinkConnection>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12710,7 +14007,11 @@ impl ListVpnSiteLinkConnectionsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVpnSiteLinksResult {
     #[doc = "List of VpnSitesLinks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnSiteLink>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12731,7 +14032,11 @@ impl ListVpnSiteLinksResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListVpnSitesResult {
     #[doc = "List of VpnSites."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnSite>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12790,7 +14095,11 @@ impl LoadBalancerBackendAddress {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancerBackendAddressPoolListResult {
     #[doc = "A list of backend address pools in a load balancer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackendAddressPool>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12826,7 +14135,12 @@ pub struct LoadBalancerBackendAddressPropertiesFormat {
     #[serde(rename = "loadBalancerFrontendIPConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub load_balancer_frontend_ip_configuration: Option<SubResource>,
     #[doc = "Collection of inbound NAT rule port mappings."]
-    #[serde(rename = "inboundNatRulesPortMapping", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatRulesPortMapping",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_rules_port_mapping: Vec<NatRulePortMapping>,
     #[doc = "A list of administrative states which once set can override health probe so that Load Balancer will always forward new connections to backend, or deny new connections and reset existing connections."]
     #[serde(rename = "adminState", default, skip_serializing_if = "Option::is_none")]
@@ -12885,7 +14199,11 @@ pub mod load_balancer_backend_address_properties_format {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancerFrontendIpConfigurationListResult {
     #[doc = "A list of frontend IP configurations in a load balancer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FrontendIpConfiguration>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12906,7 +14224,11 @@ impl LoadBalancerFrontendIpConfigurationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancerListResult {
     #[doc = "A list of load balancers in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoadBalancer>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12927,7 +14249,11 @@ impl LoadBalancerListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancerLoadBalancingRuleListResult {
     #[doc = "A list of load balancing rules in a load balancer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoadBalancingRule>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12948,7 +14274,11 @@ impl LoadBalancerLoadBalancingRuleListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancerOutboundRuleListResult {
     #[doc = "A list of outbound rules in a load balancer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OutboundRule>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12969,7 +14299,11 @@ impl LoadBalancerOutboundRuleListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancerProbeListResult {
     #[doc = "A list of probes in a load balancer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Probe>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12990,25 +14324,59 @@ impl LoadBalancerProbeListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancerPropertiesFormat {
     #[doc = "Object representing the frontend IPs to be used for the load balancer."]
-    #[serde(rename = "frontendIPConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendIPConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_ip_configurations: Vec<FrontendIpConfiguration>,
     #[doc = "Collection of backend address pools used by a load balancer."]
-    #[serde(rename = "backendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_address_pools: Vec<BackendAddressPool>,
     #[doc = "Object collection representing the load balancing rules Gets the provisioning."]
-    #[serde(rename = "loadBalancingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_rules: Vec<LoadBalancingRule>,
     #[doc = "Collection of probe objects used in the load balancer."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub probes: Vec<Probe>,
     #[doc = "Collection of inbound NAT Rules used by a load balancer. Defining inbound NAT rules on your load balancer is mutually exclusive with defining an inbound NAT pool. Inbound NAT pools are referenced from virtual machine scale sets. NICs that are associated with individual virtual machines cannot reference an Inbound NAT pool. They have to reference individual inbound NAT rules."]
-    #[serde(rename = "inboundNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_rules: Vec<InboundNatRule>,
     #[doc = "Defines an external port range for inbound NAT to a single backend port on NICs associated with a load balancer. Inbound NAT rules are created automatically for each NIC associated with the Load Balancer using an external port from this range. Defining an Inbound NAT pool on your Load Balancer is mutually exclusive with defining inbound NAT rules. Inbound NAT pools are referenced from virtual machine scale sets. NICs that are associated with individual virtual machines cannot reference an inbound NAT pool. They have to reference individual inbound NAT rules."]
-    #[serde(rename = "inboundNatPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundNatPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_nat_pools: Vec<InboundNatPool>,
     #[doc = "The outbound rules."]
-    #[serde(rename = "outboundRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outboundRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outbound_rules: Vec<OutboundRule>,
     #[doc = "The resource GUID property of the load balancer resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -13120,7 +14488,12 @@ pub mod load_balancer_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoadBalancerVipSwapRequest {
     #[doc = "A list of frontend IP configuration resources that should swap VIPs."]
-    #[serde(rename = "frontendIPConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendIPConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_ip_configurations: Vec<LoadBalancerVipSwapRequestFrontendIpConfiguration>,
 }
 impl LoadBalancerVipSwapRequest {
@@ -13188,7 +14561,12 @@ pub struct LoadBalancingRulePropertiesFormat {
     #[serde(rename = "backendAddressPool", default, skip_serializing_if = "Option::is_none")]
     pub backend_address_pool: Option<SubResource>,
     #[doc = "An array of references to pool of DIPs."]
-    #[serde(rename = "backendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_address_pools: Vec<SubResource>,
     #[doc = "Reference to another subresource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -13307,7 +14685,11 @@ impl LocalNetworkGateway {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocalNetworkGatewayListResult {
     #[doc = "A list of local network gateways that exists in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LocalNetworkGateway>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13376,7 +14758,11 @@ pub struct ManagedRuleGroupOverride {
     #[serde(rename = "ruleGroupName")]
     pub rule_group_name: String,
     #[doc = "List of rules that will be disabled. If none specified, all rules in the group will be disabled."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ManagedRuleOverride>,
 }
 impl ManagedRuleGroupOverride {
@@ -13450,7 +14836,12 @@ pub struct ManagedRuleSet {
     #[serde(rename = "ruleSetVersion")]
     pub rule_set_version: String,
     #[doc = "Defines the rule group overrides to apply to the rule set."]
-    #[serde(rename = "ruleGroupOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ruleGroupOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rule_group_overrides: Vec<ManagedRuleGroupOverride>,
 }
 impl ManagedRuleSet {
@@ -13466,7 +14857,11 @@ impl ManagedRuleSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ManagedRulesDefinition {
     #[doc = "The Exclusions that are applied on the policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusions: Vec<OwaspCrsExclusionEntry>,
     #[doc = "The managed rule sets that are associated with the policy."]
     #[serde(rename = "managedRuleSets")]
@@ -13528,7 +14923,11 @@ pub struct MatchCondition {
     #[serde(rename = "matchValues")]
     pub match_values: Vec<String>,
     #[doc = "List of transforms."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transforms: Vec<Transform>,
 }
 impl MatchCondition {
@@ -13705,7 +15104,11 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "List of availability."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<Availability>,
     #[doc = "Whether regional MDM account enabled."]
     #[serde(rename = "enableRegionalMdmAccount", default, skip_serializing_if = "Option::is_none")]
@@ -13717,7 +15120,11 @@ pub struct MetricSpecification {
     #[serde(rename = "metricFilterPattern", default, skip_serializing_if = "Option::is_none")]
     pub metric_filter_pattern: Option<String>,
     #[doc = "List of dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Whether the metric is internal."]
     #[serde(rename = "isInternal", default, skip_serializing_if = "Option::is_none")]
@@ -13749,7 +15156,11 @@ pub struct NatGateway {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<NatGatewayPropertiesFormat>,
     #[doc = "A list of availability zones denoting the zone in which Nat Gateway should be deployed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "A unique read-only string that changes whenever the resource is updated."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -13764,7 +15175,11 @@ impl NatGateway {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NatGatewayListResult {
     #[doc = "A list of Nat Gateways that exists in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NatGateway>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13788,13 +15203,27 @@ pub struct NatGatewayPropertiesFormat {
     #[serde(rename = "idleTimeoutInMinutes", default, skip_serializing_if = "Option::is_none")]
     pub idle_timeout_in_minutes: Option<i32>,
     #[doc = "An array of public ip addresses associated with the nat gateway resource."]
-    #[serde(rename = "publicIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<SubResource>,
     #[doc = "An array of public ip prefixes associated with the nat gateway resource."]
-    #[serde(rename = "publicIpPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIpPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_prefixes: Vec<SubResource>,
     #[doc = "An array of references to the subnets using this nat gateway resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<SubResource>,
     #[doc = "The resource GUID property of the NAT gateway resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -13864,16 +15293,36 @@ pub struct NatRule {
     #[serde(flatten)]
     pub firewall_policy_rule: FirewallPolicyRule,
     #[doc = "Array of FirewallPolicyRuleNetworkProtocols."]
-    #[serde(rename = "ipProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_protocols: Vec<FirewallPolicyRuleNetworkProtocol>,
     #[doc = "List of source IP addresses for this rule."]
-    #[serde(rename = "sourceAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_addresses: Vec<String>,
     #[doc = "List of destination IP addresses or Service Tags."]
-    #[serde(rename = "destinationAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_addresses: Vec<String>,
     #[doc = "List of destination ports."]
-    #[serde(rename = "destinationPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ports: Vec<String>,
     #[doc = "The translated address for this NAT rule."]
     #[serde(rename = "translatedAddress", default, skip_serializing_if = "Option::is_none")]
@@ -13882,7 +15331,12 @@ pub struct NatRule {
     #[serde(rename = "translatedPort", default, skip_serializing_if = "Option::is_none")]
     pub translated_port: Option<String>,
     #[doc = "List of source IpGroups for this rule."]
-    #[serde(rename = "sourceIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_groups: Vec<String>,
     #[doc = "The translated FQDN for this NAT rule."]
     #[serde(rename = "translatedFqdn", default, skip_serializing_if = "Option::is_none")]
@@ -14014,7 +15468,11 @@ impl NetworkConfigurationDiagnosticProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkConfigurationDiagnosticResponse {
     #[doc = "List of network configuration diagnostic results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub results: Vec<NetworkConfigurationDiagnosticResult>,
 }
 impl NetworkConfigurationDiagnosticResponse {
@@ -14093,7 +15551,12 @@ pub struct NetworkInterfaceAssociation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Collection of custom security rules."]
-    #[serde(rename = "securityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_rules: Vec<SecurityRule>,
 }
 impl NetworkInterfaceAssociation {
@@ -14105,10 +15568,20 @@ impl NetworkInterfaceAssociation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkInterfaceDnsSettings {
     #[doc = "List of DNS servers IP addresses. Use 'AzureProvidedDNS' to switch to azure provided DNS resolution. 'AzureProvidedDNS' value cannot be combined with other IPs, it must be the only value in dnsServers collection."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
     #[doc = "If the VM that uses this NIC is part of an Availability Set, then this list will have the union of all DNS servers from all NICs that are part of the Availability Set. This property is what is configured on each of those VMs."]
-    #[serde(rename = "appliedDnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appliedDnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applied_dns_servers: Vec<String>,
     #[doc = "Relative DNS name for this NIC used for internal communications between VMs in the same virtual network."]
     #[serde(rename = "internalDnsNameLabel", default, skip_serializing_if = "Option::is_none")]
@@ -14152,7 +15625,11 @@ impl NetworkInterfaceIpConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkInterfaceIpConfigurationListResult {
     #[doc = "A list of ip configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkInterfaceIpConfiguration>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14179,7 +15656,11 @@ pub struct NetworkInterfaceIpConfigurationPrivateLinkConnectionProperties {
     #[serde(rename = "requiredMemberName", default, skip_serializing_if = "Option::is_none")]
     pub required_member_name: Option<String>,
     #[doc = "List of FQDNs for current private link connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdns: Vec<String>,
 }
 impl NetworkInterfaceIpConfigurationPrivateLinkConnectionProperties {
@@ -14194,16 +15675,36 @@ pub struct NetworkInterfaceIpConfigurationPropertiesFormat {
     #[serde(rename = "gatewayLoadBalancer", default, skip_serializing_if = "Option::is_none")]
     pub gateway_load_balancer: Option<SubResource>,
     #[doc = "The reference to Virtual Network Taps."]
-    #[serde(rename = "virtualNetworkTaps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkTaps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_taps: Vec<VirtualNetworkTap>,
     #[doc = "The reference to ApplicationGatewayBackendAddressPool resource."]
-    #[serde(rename = "applicationGatewayBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_backend_address_pools: Vec<ApplicationGatewayBackendAddressPool>,
     #[doc = "The reference to LoadBalancerBackendAddressPool resource."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<BackendAddressPool>,
     #[doc = "A list of references of LoadBalancerInboundNatRules."]
-    #[serde(rename = "loadBalancerInboundNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerInboundNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_inbound_nat_rules: Vec<InboundNatRule>,
     #[doc = "Private IP address of the IP configuration."]
     #[serde(rename = "privateIPAddress", default, skip_serializing_if = "Option::is_none")]
@@ -14224,7 +15725,12 @@ pub struct NetworkInterfaceIpConfigurationPropertiesFormat {
     #[serde(rename = "publicIPAddress", default, skip_serializing_if = "Option::is_none")]
     pub public_ip_address: Option<PublicIpAddress>,
     #[doc = "Application security groups in which the IP configuration is included."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<ApplicationSecurityGroup>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -14242,7 +15748,11 @@ impl NetworkInterfaceIpConfigurationPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkInterfaceListResult {
     #[doc = "A list of network interfaces in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkInterface>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14263,7 +15773,11 @@ impl NetworkInterfaceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkInterfaceLoadBalancerListResult {
     #[doc = "A list of load balancers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LoadBalancer>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14293,10 +15807,20 @@ pub struct NetworkInterfacePropertiesFormat {
     #[serde(rename = "privateEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub private_endpoint: Option<PrivateEndpoint>,
     #[doc = "A list of IPConfigurations of the network interface."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<NetworkInterfaceIpConfiguration>,
     #[doc = "A list of TapConfigurations of the network interface."]
-    #[serde(rename = "tapConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tapConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tap_configurations: Vec<NetworkInterfaceTapConfiguration>,
     #[doc = "DNS settings of a network interface."]
     #[serde(rename = "dnsSettings", default, skip_serializing_if = "Option::is_none")]
@@ -14317,7 +15841,12 @@ pub struct NetworkInterfacePropertiesFormat {
     #[serde(rename = "enableIPForwarding", default, skip_serializing_if = "Option::is_none")]
     pub enable_ip_forwarding: Option<bool>,
     #[doc = "A list of references to linked BareMetal resources."]
-    #[serde(rename = "hostedWorkloads", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostedWorkloads",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosted_workloads: Vec<String>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "dscpConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -14498,7 +16027,11 @@ impl NetworkInterfaceTapConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkInterfaceTapConfigurationListResult {
     #[doc = "A list of tap configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkInterfaceTapConfiguration>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14551,7 +16084,11 @@ impl NetworkProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfileListResult {
     #[doc = "A list of network profiles that exist in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkProfile>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14572,10 +16109,20 @@ impl NetworkProfileListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfilePropertiesFormat {
     #[doc = "List of child container network interfaces."]
-    #[serde(rename = "containerNetworkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerNetworkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_network_interfaces: Vec<ContainerNetworkInterface>,
     #[doc = "List of chid container network interface configurations."]
-    #[serde(rename = "containerNetworkInterfaceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerNetworkInterfaceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_network_interface_configurations: Vec<ContainerNetworkInterfaceConfiguration>,
     #[doc = "The resource GUID property of the network profile resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -14595,25 +16142,60 @@ pub struct NetworkRule {
     #[serde(flatten)]
     pub firewall_policy_rule: FirewallPolicyRule,
     #[doc = "Array of FirewallPolicyRuleNetworkProtocols."]
-    #[serde(rename = "ipProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_protocols: Vec<FirewallPolicyRuleNetworkProtocol>,
     #[doc = "List of source IP addresses for this rule."]
-    #[serde(rename = "sourceAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_addresses: Vec<String>,
     #[doc = "List of destination IP addresses or Service Tags."]
-    #[serde(rename = "destinationAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_addresses: Vec<String>,
     #[doc = "List of destination ports."]
-    #[serde(rename = "destinationPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ports: Vec<String>,
     #[doc = "List of source IpGroups for this rule."]
-    #[serde(rename = "sourceIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_groups: Vec<String>,
     #[doc = "List of destination IpGroups for this rule."]
-    #[serde(rename = "destinationIpGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationIpGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ip_groups: Vec<String>,
     #[doc = "List of destination FQDNs."]
-    #[serde(rename = "destinationFqdns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationFqdns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_fqdns: Vec<String>,
 }
 impl NetworkRule {
@@ -14651,7 +16233,11 @@ impl NetworkSecurityGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkSecurityGroupListResult {
     #[doc = "A list of NetworkSecurityGroup resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkSecurityGroup>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14672,19 +16258,43 @@ impl NetworkSecurityGroupListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkSecurityGroupPropertiesFormat {
     #[doc = "A collection of security rules of the network security group."]
-    #[serde(rename = "securityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_rules: Vec<SecurityRule>,
     #[doc = "The default security rules of network security group."]
-    #[serde(rename = "defaultSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_security_rules: Vec<SecurityRule>,
     #[doc = "A collection of references to network interfaces."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
     #[doc = "A collection of references to subnets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<Subnet>,
     #[doc = "A collection of references to flow log resources."]
-    #[serde(rename = "flowLogs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "flowLogs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub flow_logs: Vec<FlowLog>,
     #[doc = "The resource GUID property of the network security group resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -14705,7 +16315,12 @@ pub struct NetworkSecurityGroupResult {
     #[serde(rename = "securityRuleAccessResult", default, skip_serializing_if = "Option::is_none")]
     pub security_rule_access_result: Option<SecurityRuleAccess>,
     #[doc = "List of results network security groups diagnostic."]
-    #[serde(rename = "evaluatedNetworkSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "evaluatedNetworkSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub evaluated_network_security_groups: Vec<EvaluatedNetworkSecurityGroup>,
 }
 impl NetworkSecurityGroupResult {
@@ -14764,7 +16379,11 @@ impl NetworkVirtualAppliance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkVirtualApplianceListResult {
     #[doc = "List of Network Virtual Appliances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkVirtualAppliance>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14791,13 +16410,23 @@ pub struct NetworkVirtualAppliancePropertiesFormat {
     #[serde(rename = "addressPrefix", default, skip_serializing_if = "Option::is_none")]
     pub address_prefix: Option<String>,
     #[doc = "BootStrapConfigurationBlobs storage URLs."]
-    #[serde(rename = "bootStrapConfigurationBlobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bootStrapConfigurationBlobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub boot_strap_configuration_blobs: Vec<String>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "virtualHub", default, skip_serializing_if = "Option::is_none")]
     pub virtual_hub: Option<SubResource>,
     #[doc = "CloudInitConfigurationBlob storage URLs."]
-    #[serde(rename = "cloudInitConfigurationBlobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cloudInitConfigurationBlobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cloud_init_configuration_blobs: Vec<String>,
     #[doc = "CloudInitConfiguration string in plain text."]
     #[serde(rename = "cloudInitConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -14809,13 +16438,28 @@ pub struct NetworkVirtualAppliancePropertiesFormat {
     #[serde(rename = "sshPublicKey", default, skip_serializing_if = "Option::is_none")]
     pub ssh_public_key: Option<String>,
     #[doc = "List of Virtual Appliance Network Interfaces."]
-    #[serde(rename = "virtualApplianceNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualApplianceNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_appliance_nics: Vec<VirtualApplianceNicProperties>,
     #[doc = "List of references to VirtualApplianceSite."]
-    #[serde(rename = "virtualApplianceSites", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualApplianceSites",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_appliance_sites: Vec<SubResource>,
     #[doc = "List of references to InboundSecurityRules."]
-    #[serde(rename = "inboundSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inboundSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inbound_security_rules: Vec<SubResource>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -14830,7 +16474,11 @@ impl NetworkVirtualAppliancePropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkVirtualApplianceSiteListResult {
     #[doc = "List of Network Virtual Appliance sites."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualApplianceSite>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14883,7 +16531,11 @@ impl NetworkVirtualApplianceSkuInstances {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkVirtualApplianceSkuListResult {
     #[doc = "List of Network Virtual Appliance Skus that are available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkVirtualApplianceSku>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14907,10 +16559,20 @@ pub struct NetworkVirtualApplianceSkuPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub vendor: Option<String>,
     #[doc = "Available Network Virtual Appliance versions."]
-    #[serde(rename = "availableVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_versions: Vec<String>,
     #[doc = "The list of scale units available."]
-    #[serde(rename = "availableScaleUnits", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableScaleUnits",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_scale_units: Vec<NetworkVirtualApplianceSkuInstances>,
 }
 impl NetworkVirtualApplianceSkuPropertiesFormat {
@@ -14939,7 +16601,11 @@ impl NetworkWatcher {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkWatcherListResult {
     #[doc = "List of network watcher resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkWatcher>,
 }
 impl azure_core::Continuable for NetworkWatcherListResult {
@@ -15189,7 +16855,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Network operations supported by the Network resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15224,10 +16894,20 @@ pub mod operation_properties_format {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ServiceSpecification {
         #[doc = "Operation service specification."]
-        #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "metricSpecifications",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub metric_specifications: Vec<MetricSpecification>,
         #[doc = "Operation log specification."]
-        #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "logSpecifications",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub log_specifications: Vec<LogSpecification>,
     }
     impl ServiceSpecification {
@@ -15409,7 +17089,12 @@ pub struct OwaspCrsExclusionEntry {
     #[doc = "When matchVariable is a collection, operator used to specify which elements in the collection this exclusion applies to."]
     pub selector: String,
     #[doc = "The managed rule sets that are associated with the exclusion."]
-    #[serde(rename = "exclusionManagedRuleSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exclusionManagedRuleSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusion_managed_rule_sets: Vec<ExclusionManagedRuleSet>,
 }
 impl OwaspCrsExclusionEntry {
@@ -15556,12 +17241,18 @@ pub struct P2sConnectionConfigurationProperties {
     #[serde(rename = "enableInternetSecurity", default, skip_serializing_if = "Option::is_none")]
     pub enable_internet_security: Option<bool>,
     #[doc = "List of Configuration Policy Groups that this P2SConnectionConfiguration is attached to."]
-    #[serde(rename = "configurationPolicyGroupAssociations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configurationPolicyGroupAssociations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configuration_policy_group_associations: Vec<SubResource>,
     #[doc = "List of previous Configuration Policy Groups that this P2SConnectionConfiguration was attached to."]
     #[serde(
         rename = "previousConfigurationPolicyGroupAssociations",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub previous_configuration_policy_group_associations: Vec<VpnServerConfigurationPolicyGroup>,
@@ -15590,7 +17281,12 @@ impl P2sVpnConnectionHealth {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct P2sVpnConnectionHealthRequest {
     #[doc = "The list of p2s vpn user names whose p2s vpn connection detailed health to retrieve for."]
-    #[serde(rename = "vpnUserNamesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnUserNamesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_user_names_filter: Vec<String>,
     #[doc = "The sas-url to download the P2S Vpn connection health detail."]
     #[serde(rename = "outputBlobSasUrl", default, skip_serializing_if = "Option::is_none")]
@@ -15605,7 +17301,12 @@ impl P2sVpnConnectionHealthRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct P2sVpnConnectionRequest {
     #[doc = "List of p2s vpn connection Ids."]
-    #[serde(rename = "vpnConnectionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnConnectionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_connection_ids: Vec<String>,
 }
 impl P2sVpnConnectionRequest {
@@ -15641,7 +17342,12 @@ pub struct P2sVpnGatewayProperties {
     #[serde(rename = "virtualHub", default, skip_serializing_if = "Option::is_none")]
     pub virtual_hub: Option<SubResource>,
     #[doc = "List of all p2s connection configurations of the gateway."]
-    #[serde(rename = "p2SConnectionConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "p2SConnectionConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub p2_s_connection_configurations: Vec<P2sConnectionConfiguration>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -15656,7 +17362,12 @@ pub struct P2sVpnGatewayProperties {
     #[serde(rename = "vpnClientConnectionHealth", default, skip_serializing_if = "Option::is_none")]
     pub vpn_client_connection_health: Option<VpnClientConnectionHealth>,
     #[doc = "List of all customer specified DNS servers IP addresses."]
-    #[serde(rename = "customDnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_dns_servers: Vec<String>,
     #[doc = "Enable Routing Preference property for the Public IP Interface of the P2SVpnGateway."]
     #[serde(rename = "isRoutingPreferenceInternet", default, skip_serializing_if = "Option::is_none")]
@@ -15767,7 +17478,11 @@ pub mod packet_capture_filter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PacketCaptureListResult {
     #[doc = "Information about packet capture sessions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PacketCaptureResult>,
 }
 impl azure_core::Continuable for PacketCaptureListResult {
@@ -15799,7 +17514,11 @@ pub struct PacketCaptureParameters {
     #[serde(rename = "storageLocation")]
     pub storage_location: PacketCaptureStorageLocation,
     #[doc = "A list of packet capture filters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<PacketCaptureFilter>,
 }
 impl PacketCaptureParameters {
@@ -15833,7 +17552,12 @@ pub struct PacketCaptureQueryStatusResult {
     #[serde(rename = "stopReason", default, skip_serializing_if = "Option::is_none")]
     pub stop_reason: Option<String>,
     #[doc = "List of errors of packet capture session."]
-    #[serde(rename = "packetCaptureError", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packetCaptureError",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub packet_capture_error: Vec<String>,
 }
 impl PacketCaptureQueryStatusResult {
@@ -16016,7 +17740,11 @@ impl PeerExpressRouteCircuitConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeerExpressRouteCircuitConnectionListResult {
     #[doc = "The global reach peer circuit connection associated with Private Peering in an ExpressRoute Circuit."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeerExpressRouteCircuitConnection>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16097,7 +17825,11 @@ impl PeerRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeerRouteList {
     #[doc = "List of peer routes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeerRoute>,
 }
 impl PeerRouteList {
@@ -16351,7 +18083,12 @@ pub struct PrepareNetworkPoliciesRequest {
     #[serde(rename = "serviceName", default, skip_serializing_if = "Option::is_none")]
     pub service_name: Option<String>,
     #[doc = "A list of NetworkIntentPolicyConfiguration."]
-    #[serde(rename = "networkIntentPolicyConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkIntentPolicyConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_intent_policy_configurations: Vec<NetworkIntentPolicyConfiguration>,
 }
 impl PrepareNetworkPoliciesRequest {
@@ -16398,7 +18135,11 @@ impl PrivateDnsZoneGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateDnsZoneGroupListResult {
     #[doc = "A list of private dns zone group resources in a private endpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateDnsZoneGroup>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16422,7 +18163,12 @@ pub struct PrivateDnsZoneGroupPropertiesFormat {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "A collection of private dns zone configurations of the private dns zone group."]
-    #[serde(rename = "privateDnsZoneConfigs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateDnsZoneConfigs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_dns_zone_configs: Vec<PrivateDnsZoneConfig>,
 }
 impl PrivateDnsZoneGroupPropertiesFormat {
@@ -16437,7 +18183,12 @@ pub struct PrivateDnsZonePropertiesFormat {
     #[serde(rename = "privateDnsZoneId", default, skip_serializing_if = "Option::is_none")]
     pub private_dns_zone_id: Option<String>,
     #[doc = "A collection of information regarding a recordSet, holding information to identify private resources."]
-    #[serde(rename = "recordSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recordSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub record_sets: Vec<RecordSet>,
 }
 impl PrivateDnsZonePropertiesFormat {
@@ -16492,7 +18243,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "A list of PrivateEndpointConnection resources for a specific private link service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16573,7 +18328,11 @@ impl PrivateEndpointIpConfigurationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointListResult {
     #[doc = "A list of private endpoint resources in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpoint>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16597,25 +18356,55 @@ pub struct PrivateEndpointProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub subnet: Option<Subnet>,
     #[doc = "An array of references to the network interfaces created for this private endpoint."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "A grouping of information about the connection to the remote resource."]
-    #[serde(rename = "privateLinkServiceConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkServiceConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_service_connections: Vec<PrivateLinkServiceConnection>,
     #[doc = "A grouping of information about the connection to the remote resource. Used when the network admin does not have access to approve connections to the remote resource."]
-    #[serde(rename = "manualPrivateLinkServiceConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "manualPrivateLinkServiceConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manual_private_link_service_connections: Vec<PrivateLinkServiceConnection>,
     #[doc = "An array of custom dns configurations."]
-    #[serde(rename = "customDnsConfigs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDnsConfigs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_dns_configs: Vec<CustomDnsConfigPropertiesFormat>,
     #[doc = "Application security groups in which the private endpoint IP configuration is included."]
-    #[serde(rename = "applicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_security_groups: Vec<ApplicationSecurityGroup>,
     #[doc = "A list of IP configurations of the private endpoint. This will be used to map to the First Party Service's endpoints."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<PrivateEndpointIpConfiguration>,
     #[doc = "The custom name of the network interface attached to the private endpoint."]
     #[serde(rename = "customNetworkInterfaceName", default, skip_serializing_if = "Option::is_none")]
@@ -16679,7 +18468,12 @@ pub struct PrivateLinkServiceConnectionProperties {
     #[serde(rename = "privateLinkServiceId", default, skip_serializing_if = "Option::is_none")]
     pub private_link_service_id: Option<String>,
     #[doc = "The ID(s) of the group(s) obtained from the remote resource that this private endpoint should connect to."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "A message passed to the owner of the remote resource with this connection request. Restricted to 140 chars."]
     #[serde(rename = "requestMessage", default, skip_serializing_if = "Option::is_none")]
@@ -16765,7 +18559,11 @@ impl PrivateLinkServiceIpConfigurationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkServiceListResult {
     #[doc = "A list of PrivateLinkService resources in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkService>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16786,19 +18584,39 @@ impl PrivateLinkServiceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkServiceProperties {
     #[doc = "An array of references to the load balancer IP configurations."]
-    #[serde(rename = "loadBalancerFrontendIpConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerFrontendIpConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_frontend_ip_configurations: Vec<FrontendIpConfiguration>,
     #[doc = "An array of private link service IP configurations."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<PrivateLinkServiceIpConfiguration>,
     #[doc = "An array of references to the network interfaces created for this private link service."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterface>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "An array of list about connections to the private endpoint."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The visibility list of the private link service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -16807,7 +18625,11 @@ pub struct PrivateLinkServiceProperties {
     #[serde(rename = "autoApproval", default, skip_serializing_if = "Option::is_none")]
     pub auto_approval: Option<serde_json::Value>,
     #[doc = "The list of Fqdn."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdns: Vec<String>,
     #[doc = "The alias of the private link service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -16860,7 +18682,12 @@ impl Probe {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ProbePropertiesFormat {
     #[doc = "The load balancer rules that use this probe."]
-    #[serde(rename = "loadBalancingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_rules: Vec<SubResource>,
     #[doc = "The protocol of the end point. If 'Tcp' is specified, a received ACK is required for the probe to be successful. If 'Http' or 'Https' is specified, a 200 OK response from the specifies URI is required for the probe to be successful."]
     pub protocol: probe_properties_format::Protocol,
@@ -16938,10 +18765,18 @@ pub mod probe_properties_format {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PropagatedRouteTable {
     #[doc = "The list of labels."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "The list of resource ids of all the RouteTables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ids: Vec<SubResource>,
 }
 impl PropagatedRouteTable {
@@ -17166,7 +19001,11 @@ pub struct PublicIpAddress {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "A list of availability zones denoting the IP allocated for the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl PublicIpAddress {
@@ -17196,7 +19035,11 @@ impl PublicIpAddressDnsSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PublicIpAddressListResult {
     #[doc = "A list of public IP addresses that exists in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PublicIpAddress>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -17232,7 +19075,12 @@ pub struct PublicIpAddressPropertiesFormat {
     #[serde(rename = "ddosSettings", default, skip_serializing_if = "Option::is_none")]
     pub ddos_settings: Option<DdosSettings>,
     #[doc = "The list of tags associated with the public IP address."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<IpTag>,
     #[doc = "The IP address associated with the public IP address resource."]
     #[serde(rename = "ipAddress", default, skip_serializing_if = "Option::is_none")]
@@ -17463,7 +19311,11 @@ pub struct PublicIpPrefix {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "A list of availability zones denoting the IP allocated for the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl PublicIpPrefix {
@@ -17475,7 +19327,11 @@ impl PublicIpPrefix {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PublicIpPrefixListResult {
     #[doc = "A list of public IP prefixes that exists in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PublicIpPrefix>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -17499,7 +19355,12 @@ pub struct PublicIpPrefixPropertiesFormat {
     #[serde(rename = "publicIPAddressVersion", default, skip_serializing_if = "Option::is_none")]
     pub public_ip_address_version: Option<IpVersion>,
     #[doc = "The list of tags associated with the public IP prefix."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<IpTag>,
     #[doc = "The Length of the Public IP Prefix."]
     #[serde(rename = "prefixLength", default, skip_serializing_if = "Option::is_none")]
@@ -17508,7 +19369,12 @@ pub struct PublicIpPrefixPropertiesFormat {
     #[serde(rename = "ipPrefix", default, skip_serializing_if = "Option::is_none")]
     pub ip_prefix: Option<String>,
     #[doc = "The list of all referenced PublicIPAddresses."]
-    #[serde(rename = "publicIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<ReferencedPublicIpAddress>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "loadBalancerFrontendIpConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -17625,19 +19491,43 @@ pub mod public_ip_prefix_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QosDefinition {
     #[doc = "List of markings to be used in the configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub markings: Vec<i32>,
     #[doc = "Source IP ranges."]
-    #[serde(rename = "sourceIpRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIpRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ip_ranges: Vec<QosIpRange>,
     #[doc = "Destination IP ranges."]
-    #[serde(rename = "destinationIpRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationIpRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ip_ranges: Vec<QosIpRange>,
     #[doc = "Sources port ranges."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<QosPortRange>,
     #[doc = "Destination port ranges."]
-    #[serde(rename = "destinationPortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_port_ranges: Vec<QosPortRange>,
     #[doc = "RNM supported protocol types."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -17754,7 +19644,11 @@ pub struct QueryResults {
     #[serde(rename = "matchingRecordsCount", default, skip_serializing_if = "Option::is_none")]
     pub matching_records_count: Option<i64>,
     #[doc = "Array containing the results of the query"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub signatures: Vec<SingleQueryResult>,
 }
 impl QueryResults {
@@ -17815,7 +19709,12 @@ pub struct RecordSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub ttl: Option<i64>,
     #[doc = "The private ip address of the private endpoint."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
 }
 impl RecordSet {
@@ -17948,7 +19847,11 @@ impl ResourceNavigationLinkFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceNavigationLinksListResult {
     #[doc = "The resource navigation links in a subnet."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceNavigationLink>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -17963,7 +19866,11 @@ impl ResourceNavigationLinksListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSet {
     #[doc = "The list of subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
 }
 impl ResourceSet {
@@ -18034,7 +19941,11 @@ impl RouteFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RouteFilterListResult {
     #[doc = "A list of route filters in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RouteFilter>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -18055,13 +19966,26 @@ impl RouteFilterListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RouteFilterPropertiesFormat {
     #[doc = "Collection of RouteFilterRules contained within a route filter."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<RouteFilterRule>,
     #[doc = "A collection of references to express route circuit peerings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peerings: Vec<ExpressRouteCircuitPeering>,
     #[doc = "A collection of references to express route circuit ipv6 peerings."]
-    #[serde(rename = "ipv6Peerings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv6Peerings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv6_peerings: Vec<ExpressRouteCircuitPeering>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -18099,7 +20023,11 @@ impl RouteFilterRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RouteFilterRuleListResult {
     #[doc = "A list of RouteFilterRules in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RouteFilterRule>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -18186,7 +20114,11 @@ pub mod route_filter_rule_properties_format {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RouteListResult {
     #[doc = "A list of routes in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Route>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -18297,7 +20229,11 @@ impl RouteTable {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RouteTableListResult {
     #[doc = "A list of route tables in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RouteTable>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -18318,10 +20254,18 @@ impl RouteTableListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RouteTablePropertiesFormat {
     #[doc = "Collection of routes contained within a route table."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<Route>,
     #[doc = "A collection of references to subnets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<Subnet>,
     #[doc = "Whether to disable the routes learned by BGP on that route table. True means disable."]
     #[serde(rename = "disableBgpRoutePropagation", default, skip_serializing_if = "Option::is_none")]
@@ -18383,7 +20327,12 @@ impl RoutingIntent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoutingIntentProperties {
     #[doc = "List of routing policies."]
-    #[serde(rename = "routingPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "routingPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routing_policies: Vec<RoutingPolicy>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -18486,7 +20435,12 @@ impl SecurityGroupViewParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityGroupViewResult {
     #[doc = "List of network interfaces on the specified VM."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<SecurityGroupNetworkInterface>,
 }
 impl SecurityGroupViewResult {
@@ -18558,7 +20512,11 @@ impl Serialize for SecurityPartnerProviderConnectionStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityPartnerProviderListResult {
     #[doc = "List of Security Partner Providers in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SecurityPartnerProvider>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -18705,10 +20663,20 @@ pub struct SecurityRuleAssociations {
     #[serde(rename = "subnetAssociation", default, skip_serializing_if = "Option::is_none")]
     pub subnet_association: Option<SubnetAssociation>,
     #[doc = "Collection of default security rules of the network security group."]
-    #[serde(rename = "defaultSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_security_rules: Vec<SecurityRule>,
     #[doc = "Collection of effective security rules."]
-    #[serde(rename = "effectiveSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "effectiveSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effective_security_rules: Vec<EffectiveNetworkSecurityRule>,
 }
 impl SecurityRuleAssociations {
@@ -18757,7 +20725,11 @@ impl Serialize for SecurityRuleDirection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityRuleListResult {
     #[doc = "The security rules in a network security group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SecurityRule>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -18792,25 +20764,55 @@ pub struct SecurityRulePropertiesFormat {
     #[serde(rename = "sourceAddressPrefix", default, skip_serializing_if = "Option::is_none")]
     pub source_address_prefix: Option<String>,
     #[doc = "The CIDR or source IP ranges."]
-    #[serde(rename = "sourceAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_address_prefixes: Vec<String>,
     #[doc = "The application security group specified as source."]
-    #[serde(rename = "sourceApplicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceApplicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_application_security_groups: Vec<ApplicationSecurityGroup>,
     #[doc = "The destination address prefix. CIDR or destination IP range. Asterisk '*' can also be used to match all source IPs. Default tags such as 'VirtualNetwork', 'AzureLoadBalancer' and 'Internet' can also be used."]
     #[serde(rename = "destinationAddressPrefix", default, skip_serializing_if = "Option::is_none")]
     pub destination_address_prefix: Option<String>,
     #[doc = "The destination address prefixes. CIDR or destination IP ranges."]
-    #[serde(rename = "destinationAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_address_prefixes: Vec<String>,
     #[doc = "The application security group specified as destination."]
-    #[serde(rename = "destinationApplicationSecurityGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationApplicationSecurityGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_application_security_groups: Vec<ApplicationSecurityGroup>,
     #[doc = "The source port ranges."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
     #[doc = "The destination port ranges."]
-    #[serde(rename = "destinationPortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_port_ranges: Vec<String>,
     #[doc = "Whether network traffic is allowed or denied."]
     pub access: SecurityRuleAccess,
@@ -18933,7 +20935,11 @@ pub struct ServiceAssociationLinkPropertiesFormat {
     #[serde(rename = "allowDelete", default, skip_serializing_if = "Option::is_none")]
     pub allow_delete: Option<bool>,
     #[doc = "A list of locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl ServiceAssociationLinkPropertiesFormat {
@@ -18945,7 +20951,11 @@ impl ServiceAssociationLinkPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceAssociationLinksListResult {
     #[doc = "The service association links in a subnet."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceAssociationLink>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -18963,7 +20973,11 @@ pub struct ServiceDelegationPropertiesFormat {
     #[serde(rename = "serviceName", default, skip_serializing_if = "Option::is_none")]
     pub service_name: Option<String>,
     #[doc = "The actions permitted to the service upon delegation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -19021,7 +21035,11 @@ impl ServiceEndpointPolicyDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceEndpointPolicyDefinitionListResult {
     #[doc = "The service endpoint policy definition in a service endpoint policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceEndpointPolicyDefinition>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -19048,7 +21066,12 @@ pub struct ServiceEndpointPolicyDefinitionPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub service: Option<String>,
     #[doc = "A list of service resources."]
-    #[serde(rename = "serviceResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_resources: Vec<String>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -19063,7 +21086,11 @@ impl ServiceEndpointPolicyDefinitionPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceEndpointPolicyListResult {
     #[doc = "A list of ServiceEndpointPolicy resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceEndpointPolicy>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -19084,10 +21111,19 @@ impl ServiceEndpointPolicyListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceEndpointPolicyPropertiesFormat {
     #[doc = "A collection of service endpoint policy definitions of the service endpoint policy."]
-    #[serde(rename = "serviceEndpointPolicyDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceEndpointPolicyDefinitions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_endpoint_policy_definitions: Vec<ServiceEndpointPolicyDefinition>,
     #[doc = "A collection of references to subnets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<Subnet>,
     #[doc = "The resource GUID property of the service endpoint policy resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -19099,7 +21135,12 @@ pub struct ServiceEndpointPolicyPropertiesFormat {
     #[serde(rename = "serviceAlias", default, skip_serializing_if = "Option::is_none")]
     pub service_alias: Option<String>,
     #[doc = "A collection of contextual service endpoint policy."]
-    #[serde(rename = "contextualServiceEndpointPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contextualServiceEndpointPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contextual_service_endpoint_policies: Vec<String>,
 }
 impl ServiceEndpointPolicyPropertiesFormat {
@@ -19114,7 +21155,11 @@ pub struct ServiceEndpointPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub service: Option<String>,
     #[doc = "A list of locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -19191,7 +21236,11 @@ impl ServiceTagInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceTagInformationListResult {
     #[doc = "The list of service tag information resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceTagInformation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -19221,7 +21270,12 @@ pub struct ServiceTagInformationPropertiesFormat {
     #[serde(rename = "systemService", default, skip_serializing_if = "Option::is_none")]
     pub system_service: Option<String>,
     #[doc = "The list of IP address prefixes."]
-    #[serde(rename = "addressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefixes: Vec<String>,
     #[doc = "The state of the service tag."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -19251,7 +21305,11 @@ pub struct ServiceTagsListResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub cloud: Option<String>,
     #[doc = "The list of service tag information resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<ServiceTagInformation>,
     #[doc = "The URL to get next page of service tag information resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -19266,7 +21324,12 @@ impl ServiceTagsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SessionIds {
     #[doc = "List of session IDs."]
-    #[serde(rename = "sessionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sessionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub session_ids: Vec<String>,
 }
 impl SessionIds {
@@ -19290,7 +21353,12 @@ impl SignatureOverridesFilterValuesQuery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignatureOverridesFilterValuesResponse {
     #[doc = "Describes the possible values"]
-    #[serde(rename = "filterValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filterValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filter_values: Vec<String>,
 }
 impl SignatureOverridesFilterValuesResponse {
@@ -19344,7 +21412,11 @@ pub mod signatures_overrides {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignaturesOverridesList {
     #[doc = "Describes a list consisting exactly one item describing the policy's signature override status"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SignaturesOverrides>,
 }
 impl SignaturesOverridesList {
@@ -19376,10 +21448,20 @@ pub struct SingleQueryResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub protocol: Option<String>,
     #[doc = "Describes the list of source ports related to this signature"]
-    #[serde(rename = "sourcePorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ports: Vec<PortsList>,
     #[doc = "Describes the list of destination ports related to this signature"]
-    #[serde(rename = "destinationPorts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPorts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_ports: Vec<PortsList>,
     #[doc = "Describes the last updated time of the signature (provided from 3rd party vendor)"]
     #[serde(rename = "lastUpdated", default, skip_serializing_if = "Option::is_none")]
@@ -19469,7 +21551,12 @@ pub struct StaticRoute {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of all address prefixes."]
-    #[serde(rename = "addressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefixes: Vec<String>,
     #[doc = "The ip address of the next hop."]
     #[serde(rename = "nextHopIpAddress", default, skip_serializing_if = "Option::is_none")]
@@ -19522,7 +21609,12 @@ pub struct SubnetAssociation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Collection of custom security rules."]
-    #[serde(rename = "securityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_rules: Vec<SecurityRule>,
 }
 impl SubnetAssociation {
@@ -19534,7 +21626,11 @@ impl SubnetAssociation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubnetListResult {
     #[doc = "The subnets in a virtual network."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Subnet>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -19558,7 +21654,12 @@ pub struct SubnetPropertiesFormat {
     #[serde(rename = "addressPrefix", default, skip_serializing_if = "Option::is_none")]
     pub address_prefix: Option<String>,
     #[doc = "List of address prefixes for the subnet."]
-    #[serde(rename = "addressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefixes: Vec<String>,
     #[doc = "NetworkSecurityGroup resource."]
     #[serde(rename = "networkSecurityGroup", default, skip_serializing_if = "Option::is_none")]
@@ -19570,31 +21671,75 @@ pub struct SubnetPropertiesFormat {
     #[serde(rename = "natGateway", default, skip_serializing_if = "Option::is_none")]
     pub nat_gateway: Option<SubResource>,
     #[doc = "An array of service endpoints."]
-    #[serde(rename = "serviceEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_endpoints: Vec<ServiceEndpointPropertiesFormat>,
     #[doc = "An array of service endpoint policies."]
-    #[serde(rename = "serviceEndpointPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceEndpointPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_endpoint_policies: Vec<ServiceEndpointPolicy>,
     #[doc = "An array of references to private endpoints."]
-    #[serde(rename = "privateEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoints: Vec<PrivateEndpoint>,
     #[doc = "An array of references to the network interface IP configurations using subnet."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<IpConfiguration>,
     #[doc = "Array of IP configuration profiles which reference this subnet."]
-    #[serde(rename = "ipConfigurationProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurationProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configuration_profiles: Vec<IpConfigurationProfile>,
     #[doc = "Array of IpAllocation which reference this subnet."]
-    #[serde(rename = "ipAllocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAllocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_allocations: Vec<SubResource>,
     #[doc = "An array of references to the external resources using subnet."]
-    #[serde(rename = "resourceNavigationLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceNavigationLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_navigation_links: Vec<ResourceNavigationLink>,
     #[doc = "An array of references to services injecting into this subnet."]
-    #[serde(rename = "serviceAssociationLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceAssociationLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_association_links: Vec<ServiceAssociationLink>,
     #[doc = "An array of references to the delegations on the subnet."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegations: Vec<Delegation>,
     #[doc = "A read-only string identifying the intention of use for this subnet based on delegations and other user-defined properties."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -19609,7 +21754,12 @@ pub struct SubnetPropertiesFormat {
     #[serde(rename = "privateLinkServiceNetworkPolicies", default, skip_serializing_if = "Option::is_none")]
     pub private_link_service_network_policies: Option<subnet_properties_format::PrivateLinkServiceNetworkPolicies>,
     #[doc = "Application gateway IP configurations of virtual network resource."]
-    #[serde(rename = "applicationGatewayIpConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGatewayIpConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateway_ip_configurations: Vec<ApplicationGatewayIpConfiguration>,
 }
 impl SubnetPropertiesFormat {
@@ -19729,7 +21879,11 @@ pub struct Topology {
     #[serde(rename = "lastModified", default, with = "azure_core::date::rfc3339::option")]
     pub last_modified: Option<time::OffsetDateTime>,
     #[doc = "A list of topology resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<TopologyResource>,
 }
 impl Topology {
@@ -19826,7 +21980,11 @@ pub struct TopologyResource {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "Holds the associations the resource has with other resources in the resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub associations: Vec<TopologyAssociation>,
 }
 impl TopologyResource {
@@ -19992,7 +22150,12 @@ pub struct TroubleshootingDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub detail: Option<String>,
     #[doc = "List of recommended actions."]
-    #[serde(rename = "recommendedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recommendedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommended_actions: Vec<TroubleshootingRecommendedActions>,
 }
 impl TroubleshootingDetails {
@@ -20066,7 +22229,11 @@ pub struct TroubleshootingResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "Information from troubleshooting."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub results: Vec<TroubleshootingDetails>,
 }
 impl TroubleshootingResult {
@@ -20235,7 +22402,11 @@ impl UsageName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsagesListResult {
     #[doc = "The list network resource usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -20474,10 +22645,20 @@ impl VirtualHub {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualHubEffectiveRoute {
     #[doc = "The list of address prefixes."]
-    #[serde(rename = "addressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefixes: Vec<String>,
     #[doc = "The list of next hops."]
-    #[serde(rename = "nextHops", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nextHops",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub next_hops: Vec<String>,
     #[doc = "The type of the next hop."]
     #[serde(rename = "nextHopType", default, skip_serializing_if = "Option::is_none")]
@@ -20498,7 +22679,11 @@ impl VirtualHubEffectiveRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualHubEffectiveRouteList {
     #[doc = "The list of effective routes configured on the virtual hub or the specified resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualHubEffectiveRoute>,
 }
 impl VirtualHubEffectiveRouteList {
@@ -20552,7 +22737,12 @@ pub struct VirtualHubProperties {
     #[serde(rename = "securityProviderName", default, skip_serializing_if = "Option::is_none")]
     pub security_provider_name: Option<String>,
     #[doc = "List of all virtual hub route table v2s associated with this VirtualHub."]
-    #[serde(rename = "virtualHubRouteTableV2s", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualHubRouteTableV2s",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_hub_route_table_v2s: Vec<VirtualHubRouteTableV2>,
     #[doc = "The sku of this VirtualHub."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -20561,16 +22751,31 @@ pub struct VirtualHubProperties {
     #[serde(rename = "routingState", default, skip_serializing_if = "Option::is_none")]
     pub routing_state: Option<RoutingState>,
     #[doc = "List of references to Bgp Connections."]
-    #[serde(rename = "bgpConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bgpConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bgp_connections: Vec<SubResource>,
     #[doc = "List of references to IpConfigurations."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<SubResource>,
     #[doc = "VirtualRouter ASN."]
     #[serde(rename = "virtualRouterAsn", default, skip_serializing_if = "Option::is_none")]
     pub virtual_router_asn: Option<i64>,
     #[doc = "VirtualRouter IPs."]
-    #[serde(rename = "virtualRouterIps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualRouterIps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_router_ips: Vec<String>,
     #[doc = "Flag to control transit for VirtualRouter hub."]
     #[serde(rename = "allowBranchToBranchTraffic", default, skip_serializing_if = "Option::is_none")]
@@ -20591,7 +22796,12 @@ impl VirtualHubProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualHubRoute {
     #[doc = "List of all addressPrefixes."]
-    #[serde(rename = "addressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_prefixes: Vec<String>,
     #[doc = "NextHop ip address."]
     #[serde(rename = "nextHopIpAddress", default, skip_serializing_if = "Option::is_none")]
@@ -20606,7 +22816,11 @@ impl VirtualHubRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualHubRouteTable {
     #[doc = "List of all routes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<VirtualHubRoute>,
 }
 impl VirtualHubRouteTable {
@@ -20638,10 +22852,19 @@ impl VirtualHubRouteTableV2 {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualHubRouteTableV2Properties {
     #[doc = "List of all routes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<VirtualHubRouteV2>,
     #[doc = "List of all connections attached to this route table v2."]
-    #[serde(rename = "attachedConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "attachedConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub attached_connections: Vec<String>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -20659,13 +22882,22 @@ pub struct VirtualHubRouteV2 {
     #[serde(rename = "destinationType", default, skip_serializing_if = "Option::is_none")]
     pub destination_type: Option<String>,
     #[doc = "List of all destinations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destinations: Vec<String>,
     #[doc = "The type of next hops."]
     #[serde(rename = "nextHopType", default, skip_serializing_if = "Option::is_none")]
     pub next_hop_type: Option<String>,
     #[doc = "NextHops ip address."]
-    #[serde(rename = "nextHops", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nextHops",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub next_hops: Vec<String>,
 }
 impl VirtualHubRouteV2 {
@@ -20877,7 +23109,12 @@ pub struct VirtualNetworkGatewayConnectionListEntityPropertiesFormat {
     #[serde(rename = "connectionStatus", default, skip_serializing_if = "Option::is_none")]
     pub connection_status: Option<VirtualNetworkGatewayConnectionStatus>,
     #[doc = "Collection of all tunnels' connection health status."]
-    #[serde(rename = "tunnelConnectionStatus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tunnelConnectionStatus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tunnel_connection_status: Vec<TunnelConnectionHealth>,
     #[doc = "The egress bytes transferred in this connection."]
     #[serde(rename = "egressBytesTransferred", default, skip_serializing_if = "Option::is_none")]
@@ -20892,16 +23129,31 @@ pub struct VirtualNetworkGatewayConnectionListEntityPropertiesFormat {
     #[serde(rename = "enableBgp", default, skip_serializing_if = "Option::is_none")]
     pub enable_bgp: Option<bool>,
     #[doc = "GatewayCustomBgpIpAddresses to be used for virtual network gateway Connection."]
-    #[serde(rename = "gatewayCustomBgpIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gatewayCustomBgpIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gateway_custom_bgp_ip_addresses: Vec<GatewayCustomBgpIpAddressIpConfiguration>,
     #[doc = "Enable policy-based traffic selectors."]
     #[serde(rename = "usePolicyBasedTrafficSelectors", default, skip_serializing_if = "Option::is_none")]
     pub use_policy_based_traffic_selectors: Option<bool>,
     #[doc = "The IPSec Policies to be considered by this connection."]
-    #[serde(rename = "ipsecPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipsecPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipsec_policies: Vec<IpsecPolicy>,
     #[doc = "The Traffic Selector Policies to be considered by this connection."]
-    #[serde(rename = "trafficSelectorPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trafficSelectorPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traffic_selector_policies: Vec<TrafficSelectorPolicy>,
     #[doc = "The resource GUID property of the virtual network gateway connection resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -20948,7 +23200,11 @@ impl VirtualNetworkGatewayConnectionListEntityPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkGatewayConnectionListResult {
     #[doc = "A list of VirtualNetworkGatewayConnection resources that exists in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkGatewayConnection>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -21020,10 +23276,20 @@ pub struct VirtualNetworkGatewayConnectionPropertiesFormat {
     #[serde(rename = "localNetworkGateway2", default, skip_serializing_if = "Option::is_none")]
     pub local_network_gateway2: Option<LocalNetworkGateway>,
     #[doc = "List of ingress NatRules."]
-    #[serde(rename = "ingressNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ingressNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ingress_nat_rules: Vec<SubResource>,
     #[doc = "List of egress NatRules."]
-    #[serde(rename = "egressNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "egressNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub egress_nat_rules: Vec<SubResource>,
     #[doc = "Gateway connection type."]
     #[serde(rename = "connectionType")]
@@ -21047,7 +23313,12 @@ pub struct VirtualNetworkGatewayConnectionPropertiesFormat {
     #[serde(rename = "connectionStatus", default, skip_serializing_if = "Option::is_none")]
     pub connection_status: Option<VirtualNetworkGatewayConnectionStatus>,
     #[doc = "Collection of all tunnels' connection health status."]
-    #[serde(rename = "tunnelConnectionStatus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tunnelConnectionStatus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tunnel_connection_status: Vec<TunnelConnectionHealth>,
     #[doc = "The egress bytes transferred in this connection."]
     #[serde(rename = "egressBytesTransferred", default, skip_serializing_if = "Option::is_none")]
@@ -21062,7 +23333,12 @@ pub struct VirtualNetworkGatewayConnectionPropertiesFormat {
     #[serde(rename = "enableBgp", default, skip_serializing_if = "Option::is_none")]
     pub enable_bgp: Option<bool>,
     #[doc = "GatewayCustomBgpIpAddresses to be used for virtual network gateway Connection."]
-    #[serde(rename = "gatewayCustomBgpIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "gatewayCustomBgpIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gateway_custom_bgp_ip_addresses: Vec<GatewayCustomBgpIpAddressIpConfiguration>,
     #[doc = "Use private local Azure IP for the connection."]
     #[serde(rename = "useLocalAzureIpAddress", default, skip_serializing_if = "Option::is_none")]
@@ -21071,10 +23347,20 @@ pub struct VirtualNetworkGatewayConnectionPropertiesFormat {
     #[serde(rename = "usePolicyBasedTrafficSelectors", default, skip_serializing_if = "Option::is_none")]
     pub use_policy_based_traffic_selectors: Option<bool>,
     #[doc = "The IPSec Policies to be considered by this connection."]
-    #[serde(rename = "ipsecPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipsecPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipsec_policies: Vec<IpsecPolicy>,
     #[doc = "The Traffic Selector Policies to be considered by this connection."]
-    #[serde(rename = "trafficSelectorPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trafficSelectorPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traffic_selector_policies: Vec<TrafficSelectorPolicy>,
     #[doc = "The resource GUID property of the virtual network gateway connection resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -21249,7 +23535,11 @@ impl VirtualNetworkGatewayIpConfigurationPropertiesFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkGatewayListConnectionsResult {
     #[doc = "A list of VirtualNetworkGatewayConnection resources that exists in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkGatewayConnectionListEntity>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -21270,7 +23560,11 @@ impl VirtualNetworkGatewayListConnectionsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkGatewayListResult {
     #[doc = "A list of VirtualNetworkGateway resources that exists in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkGateway>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -21323,10 +23617,20 @@ pub struct VirtualNetworkGatewayNatRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub mode: Option<virtual_network_gateway_nat_rule_properties::Mode>,
     #[doc = "The private IP address internal mapping for NAT."]
-    #[serde(rename = "internalMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "internalMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub internal_mappings: Vec<VpnNatRuleMapping>,
     #[doc = "The private IP address external mapping for NAT."]
-    #[serde(rename = "externalMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_mappings: Vec<VpnNatRuleMapping>,
     #[doc = "The IP Configuration ID this NAT rule applies to."]
     #[serde(rename = "ipConfigurationId", default, skip_serializing_if = "Option::is_none")]
@@ -21418,7 +23722,12 @@ pub mod virtual_network_gateway_nat_rule_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkGatewayPropertiesFormat {
     #[doc = "IP configurations for virtual network gateway."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<VirtualNetworkGatewayIpConfiguration>,
     #[doc = "The type of this virtual network gateway."]
     #[serde(rename = "gatewayType", default, skip_serializing_if = "Option::is_none")]
@@ -21472,7 +23781,12 @@ pub struct VirtualNetworkGatewayPropertiesFormat {
     #[serde(rename = "vNetExtendedLocationResourceId", default, skip_serializing_if = "Option::is_none")]
     pub v_net_extended_location_resource_id: Option<String>,
     #[doc = "NatRules for virtual network gateway."]
-    #[serde(rename = "natRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "natRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nat_rules: Vec<VirtualNetworkGatewayNatRule>,
     #[doc = "EnableBgpRouteTranslationForNat flag."]
     #[serde(rename = "enableBgpRouteTranslationForNat", default, skip_serializing_if = "Option::is_none")]
@@ -21776,7 +24090,11 @@ pub mod virtual_network_gateway_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkListResult {
     #[doc = "A list of VirtualNetwork resources in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetwork>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -21797,7 +24115,11 @@ impl VirtualNetworkListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkListUsageResult {
     #[doc = "VirtualNetwork usage stats."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkUsage>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -21841,7 +24163,11 @@ impl VirtualNetworkPeering {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkPeeringListResult {
     #[doc = "The peerings in a virtual network."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkPeering>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -22005,10 +24331,19 @@ pub struct VirtualNetworkPropertiesFormat {
     #[serde(rename = "flowTimeoutInMinutes", default, skip_serializing_if = "Option::is_none")]
     pub flow_timeout_in_minutes: Option<i32>,
     #[doc = "A list of subnets in a Virtual Network."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<Subnet>,
     #[doc = "A list of peerings in a Virtual Network."]
-    #[serde(rename = "virtualNetworkPeerings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkPeerings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_peerings: Vec<VirtualNetworkPeering>,
     #[doc = "The resourceGuid property of the Virtual Network resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -22032,7 +24367,12 @@ pub struct VirtualNetworkPropertiesFormat {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<VirtualNetworkEncryption>,
     #[doc = "Array of IpAllocation which reference this VNET."]
-    #[serde(rename = "ipAllocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAllocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_allocations: Vec<SubResource>,
 }
 impl VirtualNetworkPropertiesFormat {
@@ -22061,7 +24401,11 @@ impl VirtualNetworkTap {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkTapListResult {
     #[doc = "A list of VirtualNetworkTaps in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkTap>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -22082,7 +24426,12 @@ impl VirtualNetworkTapListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkTapPropertiesFormat {
     #[doc = "Specifies the list of resource IDs for the network interface IP configuration that needs to be tapped."]
-    #[serde(rename = "networkInterfaceTapConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaceTapConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interface_tap_configurations: Vec<NetworkInterfaceTapConfiguration>,
     #[doc = "The resource GUID property of the virtual network tap resource."]
     #[serde(rename = "resourceGuid", default, skip_serializing_if = "Option::is_none")]
@@ -22173,7 +24522,11 @@ impl VirtualRouter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualRouterListResult {
     #[doc = "List of Virtual Routers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualRouter>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -22217,7 +24570,11 @@ impl VirtualRouterPeering {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualRouterPeeringListResult {
     #[doc = "List of VirtualRouterPeerings in a VirtualRouter."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualRouterPeering>,
     #[doc = "URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -22259,7 +24616,12 @@ pub struct VirtualRouterPropertiesFormat {
     #[serde(rename = "virtualRouterAsn", default, skip_serializing_if = "Option::is_none")]
     pub virtual_router_asn: Option<i64>,
     #[doc = "VirtualRouter IPs."]
-    #[serde(rename = "virtualRouterIps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualRouterIps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_router_ips: Vec<String>,
     #[doc = "Reference to another subresource."]
     #[serde(rename = "hostedSubnet", default, skip_serializing_if = "Option::is_none")]
@@ -22268,7 +24630,11 @@ pub struct VirtualRouterPropertiesFormat {
     #[serde(rename = "hostedGateway", default, skip_serializing_if = "Option::is_none")]
     pub hosted_gateway: Option<SubResource>,
     #[doc = "List of references to VirtualRouterPeerings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peerings: Vec<SubResource>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -22307,10 +24673,20 @@ pub struct VirtualWanProperties {
     #[serde(rename = "disableVpnEncryption", default, skip_serializing_if = "Option::is_none")]
     pub disable_vpn_encryption: Option<bool>,
     #[doc = "List of VirtualHubs in the VirtualWAN."]
-    #[serde(rename = "virtualHubs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualHubs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_hubs: Vec<SubResource>,
     #[doc = "List of VpnSites in the VirtualWAN."]
-    #[serde(rename = "vpnSites", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnSites",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_sites: Vec<SubResource>,
     #[doc = "True if branch to branch traffic is allowed."]
     #[serde(rename = "allowBranchToBranchTraffic", default, skip_serializing_if = "Option::is_none")]
@@ -22392,7 +24768,12 @@ impl Serialize for VirtualWanSecurityProviderType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualWanSecurityProviders {
     #[doc = "List of VirtualWAN security providers."]
-    #[serde(rename = "supportedProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_providers: Vec<VirtualWanSecurityProvider>,
 }
 impl VirtualWanSecurityProviders {
@@ -22419,10 +24800,20 @@ impl VirtualWanVpnProfileParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VnetRoute {
     #[doc = "List of all Static Routes."]
-    #[serde(rename = "staticRoutes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "staticRoutes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub static_routes: Vec<StaticRoute>,
     #[doc = "The list of references to HubBgpConnection objects."]
-    #[serde(rename = "bgpConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bgpConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bgp_connections: Vec<SubResource>,
 }
 impl VnetRoute {
@@ -22437,19 +24828,44 @@ pub struct VpnClientConfiguration {
     #[serde(rename = "vpnClientAddressPool", default, skip_serializing_if = "Option::is_none")]
     pub vpn_client_address_pool: Option<AddressSpace>,
     #[doc = "VpnClientRootCertificate for virtual network gateway."]
-    #[serde(rename = "vpnClientRootCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnClientRootCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_client_root_certificates: Vec<VpnClientRootCertificate>,
     #[doc = "VpnClientRevokedCertificate for Virtual network gateway."]
-    #[serde(rename = "vpnClientRevokedCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnClientRevokedCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_client_revoked_certificates: Vec<VpnClientRevokedCertificate>,
     #[doc = "VpnClientProtocols for Virtual network gateway."]
-    #[serde(rename = "vpnClientProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnClientProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_client_protocols: Vec<String>,
     #[doc = "VPN authentication types for the virtual network gateway.."]
-    #[serde(rename = "vpnAuthenticationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnAuthenticationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_authentication_types: Vec<String>,
     #[doc = "VpnClientIpsecPolicies for virtual network gateway P2S client."]
-    #[serde(rename = "vpnClientIpsecPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnClientIpsecPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_client_ipsec_policies: Vec<IpsecPolicy>,
     #[doc = "The radius server address property of the VirtualNetworkGateway resource for vpn client connection."]
     #[serde(rename = "radiusServerAddress", default, skip_serializing_if = "Option::is_none")]
@@ -22458,7 +24874,12 @@ pub struct VpnClientConfiguration {
     #[serde(rename = "radiusServerSecret", default, skip_serializing_if = "Option::is_none")]
     pub radius_server_secret: Option<String>,
     #[doc = "The radiusServers property for multiple radius server configuration."]
-    #[serde(rename = "radiusServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "radiusServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub radius_servers: Vec<RadiusServer>,
     #[doc = "The AADTenant property of the VirtualNetworkGateway resource for vpn client connection used for AAD authentication."]
     #[serde(rename = "aadTenant", default, skip_serializing_if = "Option::is_none")]
@@ -22488,7 +24909,12 @@ pub struct VpnClientConnectionHealth {
     #[serde(rename = "vpnClientConnectionsCount", default, skip_serializing_if = "Option::is_none")]
     pub vpn_client_connections_count: Option<i32>,
     #[doc = "List of allocated ip addresses to the connected p2s vpn clients."]
-    #[serde(rename = "allocatedIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allocatedIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allocated_ip_addresses: Vec<String>,
 }
 impl VpnClientConnectionHealth {
@@ -22545,7 +24971,11 @@ impl VpnClientConnectionHealthDetail {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VpnClientConnectionHealthDetailListResult {
     #[doc = "List of vpn client connection health."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VpnClientConnectionHealthDetail>,
 }
 impl VpnClientConnectionHealthDetailListResult {
@@ -22617,7 +25047,12 @@ pub struct VpnClientParameters {
     #[serde(rename = "radiusServerAuthCertificate", default, skip_serializing_if = "Option::is_none")]
     pub radius_server_auth_certificate: Option<String>,
     #[doc = "A list of client root certificates public certificate data encoded as Base-64 strings. Optional parameter for external radius based authentication with EAPTLS."]
-    #[serde(rename = "clientRootCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientRootCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_root_certificates: Vec<String>,
 }
 impl VpnClientParameters {
@@ -22769,7 +25204,12 @@ pub struct VpnConnectionPacketCaptureStartParameters {
     #[serde(rename = "filterData", default, skip_serializing_if = "Option::is_none")]
     pub filter_data: Option<String>,
     #[doc = "List of site link connection names."]
-    #[serde(rename = "linkConnectionNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkConnectionNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub link_connection_names: Vec<String>,
 }
 impl VpnConnectionPacketCaptureStartParameters {
@@ -22784,7 +25224,12 @@ pub struct VpnConnectionPacketCaptureStopParameters {
     #[serde(rename = "sasUrl", default, skip_serializing_if = "Option::is_none")]
     pub sas_url: Option<String>,
     #[doc = "List of site link connection names."]
-    #[serde(rename = "linkConnectionNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkConnectionNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub link_connection_names: Vec<String>,
 }
 impl VpnConnectionPacketCaptureStopParameters {
@@ -22829,10 +25274,20 @@ pub struct VpnConnectionProperties {
     #[serde(rename = "usePolicyBasedTrafficSelectors", default, skip_serializing_if = "Option::is_none")]
     pub use_policy_based_traffic_selectors: Option<bool>,
     #[doc = "The IPSec Policies to be considered by this connection."]
-    #[serde(rename = "ipsecPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipsecPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipsec_policies: Vec<IpsecPolicy>,
     #[doc = "The Traffic Selector Policies to be considered by this connection."]
-    #[serde(rename = "trafficSelectorPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trafficSelectorPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traffic_selector_policies: Vec<TrafficSelectorPolicy>,
     #[doc = "EnableBgp flag."]
     #[serde(rename = "enableRateLimiting", default, skip_serializing_if = "Option::is_none")]
@@ -22847,7 +25302,12 @@ pub struct VpnConnectionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "List of all vpn site link connections to the gateway."]
-    #[serde(rename = "vpnLinkConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnLinkConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_link_connections: Vec<VpnSiteLinkConnection>,
     #[doc = "Routing Configuration indicating the associated and propagated route tables for this connection."]
     #[serde(rename = "routingConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -22992,19 +25452,39 @@ pub struct VpnGatewayNatRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub mode: Option<vpn_gateway_nat_rule_properties::Mode>,
     #[doc = "The private IP address internal mapping for NAT."]
-    #[serde(rename = "internalMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "internalMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub internal_mappings: Vec<VpnNatRuleMapping>,
     #[doc = "The private IP address external mapping for NAT."]
-    #[serde(rename = "externalMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_mappings: Vec<VpnNatRuleMapping>,
     #[doc = "The IP Configuration ID this NAT rule applies to."]
     #[serde(rename = "ipConfigurationId", default, skip_serializing_if = "Option::is_none")]
     pub ip_configuration_id: Option<String>,
     #[doc = "List of egress VpnSiteLinkConnections."]
-    #[serde(rename = "egressVpnSiteLinkConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "egressVpnSiteLinkConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub egress_vpn_site_link_connections: Vec<SubResource>,
     #[doc = "List of ingress VpnSiteLinkConnections."]
-    #[serde(rename = "ingressVpnSiteLinkConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ingressVpnSiteLinkConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ingress_vpn_site_link_connections: Vec<SubResource>,
 }
 impl VpnGatewayNatRuleProperties {
@@ -23120,7 +25600,11 @@ pub struct VpnGatewayProperties {
     #[serde(rename = "virtualHub", default, skip_serializing_if = "Option::is_none")]
     pub virtual_hub: Option<SubResource>,
     #[doc = "List of all vpn connections to the gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connections: Vec<VpnConnection>,
     #[doc = "BGP settings details."]
     #[serde(rename = "bgpSettings", default, skip_serializing_if = "Option::is_none")]
@@ -23132,7 +25616,12 @@ pub struct VpnGatewayProperties {
     #[serde(rename = "vpnGatewayScaleUnit", default, skip_serializing_if = "Option::is_none")]
     pub vpn_gateway_scale_unit: Option<i32>,
     #[doc = "List of all IPs configured on the gateway."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<VpnGatewayIpConfiguration>,
     #[doc = "Enable BGP routes translation for NAT on this VpnGateway."]
     #[serde(rename = "enableBgpRouteTranslationForNat", default, skip_serializing_if = "Option::is_none")]
@@ -23141,7 +25630,12 @@ pub struct VpnGatewayProperties {
     #[serde(rename = "isRoutingPreferenceInternet", default, skip_serializing_if = "Option::is_none")]
     pub is_routing_preference_internet: Option<bool>,
     #[doc = "List of all the nat Rules associated with the gateway."]
-    #[serde(rename = "natRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "natRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nat_rules: Vec<VpnGatewayNatRule>,
 }
 impl VpnGatewayProperties {
@@ -23404,10 +25898,20 @@ pub struct VpnServerConfigurationPolicyGroupProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub priority: Option<i32>,
     #[doc = "Multiple PolicyMembers for VpnServerConfigurationPolicyGroup."]
-    #[serde(rename = "policyMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_members: Vec<VpnServerConfigurationPolicyGroupMember>,
     #[doc = "List of references to P2SConnectionConfigurations."]
-    #[serde(rename = "p2SConnectionConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "p2SConnectionConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub p2_s_connection_configurations: Vec<SubResource>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -23425,25 +25929,60 @@ pub struct VpnServerConfigurationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "VPN protocols for the VpnServerConfiguration."]
-    #[serde(rename = "vpnProtocols", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnProtocols",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_protocols: Vec<String>,
     #[doc = "VPN authentication types for the VpnServerConfiguration."]
-    #[serde(rename = "vpnAuthenticationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnAuthenticationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_authentication_types: Vec<String>,
     #[doc = "VPN client root certificate of VpnServerConfiguration."]
-    #[serde(rename = "vpnClientRootCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnClientRootCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_client_root_certificates: Vec<VpnServerConfigVpnClientRootCertificate>,
     #[doc = "VPN client revoked certificate of VpnServerConfiguration."]
-    #[serde(rename = "vpnClientRevokedCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnClientRevokedCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_client_revoked_certificates: Vec<VpnServerConfigVpnClientRevokedCertificate>,
     #[doc = "Radius Server root certificate of VpnServerConfiguration."]
-    #[serde(rename = "radiusServerRootCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "radiusServerRootCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub radius_server_root_certificates: Vec<VpnServerConfigRadiusServerRootCertificate>,
     #[doc = "Radius client root certificate of VpnServerConfiguration."]
-    #[serde(rename = "radiusClientRootCertificates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "radiusClientRootCertificates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub radius_client_root_certificates: Vec<VpnServerConfigRadiusClientRootCertificate>,
     #[doc = "VpnClientIpsecPolicies for VpnServerConfiguration."]
-    #[serde(rename = "vpnClientIpsecPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnClientIpsecPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_client_ipsec_policies: Vec<IpsecPolicy>,
     #[doc = "The radius server address property of the VpnServerConfiguration resource for point to site client connection."]
     #[serde(rename = "radiusServerAddress", default, skip_serializing_if = "Option::is_none")]
@@ -23452,7 +25991,12 @@ pub struct VpnServerConfigurationProperties {
     #[serde(rename = "radiusServerSecret", default, skip_serializing_if = "Option::is_none")]
     pub radius_server_secret: Option<String>,
     #[doc = "Multiple Radius Server configuration for VpnServerConfiguration."]
-    #[serde(rename = "radiusServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "radiusServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub radius_servers: Vec<RadiusServer>,
     #[doc = "AAD Vpn authentication type related parameters."]
     #[serde(rename = "aadAuthenticationParameters", default, skip_serializing_if = "Option::is_none")]
@@ -23461,10 +26005,20 @@ pub struct VpnServerConfigurationProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "List of references to P2SVpnGateways."]
-    #[serde(rename = "p2SVpnGateways", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "p2SVpnGateways",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub p2_s_vpn_gateways: Vec<P2sVpnGateway>,
     #[doc = "List of all VpnServerConfigurationPolicyGroups."]
-    #[serde(rename = "configurationPolicyGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "configurationPolicyGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configuration_policy_groups: Vec<VpnServerConfigurationPolicyGroup>,
     #[doc = "A unique read-only string that changes whenever the resource is updated."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -23479,7 +26033,12 @@ impl VpnServerConfigurationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VpnServerConfigurationsResponse {
     #[doc = "List of VpnServerConfigurations associated with VirtualWan."]
-    #[serde(rename = "vpnServerConfigurationResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnServerConfigurationResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_server_configuration_resource_ids: Vec<String>,
 }
 impl VpnServerConfigurationsResponse {
@@ -23600,13 +26159,23 @@ pub struct VpnSiteLinkConnectionProperties {
     #[serde(rename = "enableBgp", default, skip_serializing_if = "Option::is_none")]
     pub enable_bgp: Option<bool>,
     #[doc = "vpnGatewayCustomBgpAddresses used by this connection."]
-    #[serde(rename = "vpnGatewayCustomBgpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnGatewayCustomBgpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_gateway_custom_bgp_addresses: Vec<GatewayCustomBgpIpAddressIpConfiguration>,
     #[doc = "Enable policy-based traffic selectors."]
     #[serde(rename = "usePolicyBasedTrafficSelectors", default, skip_serializing_if = "Option::is_none")]
     pub use_policy_based_traffic_selectors: Option<bool>,
     #[doc = "The IPSec Policies to be considered by this connection."]
-    #[serde(rename = "ipsecPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipsecPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipsec_policies: Vec<IpsecPolicy>,
     #[doc = "EnableBgp flag."]
     #[serde(rename = "enableRateLimiting", default, skip_serializing_if = "Option::is_none")]
@@ -23618,10 +26187,20 @@ pub struct VpnSiteLinkConnectionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
     #[doc = "List of ingress NatRules."]
-    #[serde(rename = "ingressNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ingressNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ingress_nat_rules: Vec<SubResource>,
     #[doc = "List of egress NatRules."]
-    #[serde(rename = "egressNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "egressNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub egress_nat_rules: Vec<SubResource>,
 }
 impl VpnSiteLinkConnectionProperties {
@@ -23723,7 +26302,12 @@ pub struct VpnSiteProperties {
     #[serde(rename = "isSecuritySite", default, skip_serializing_if = "Option::is_none")]
     pub is_security_site: Option<bool>,
     #[doc = "List of all vpn site links."]
-    #[serde(rename = "vpnSiteLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vpnSiteLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vpn_site_links: Vec<VpnSiteLink>,
     #[doc = "The Office365 breakout policy."]
     #[serde(rename = "o365Policy", default, skip_serializing_if = "Option::is_none")]
@@ -23871,7 +26455,11 @@ impl WebApplicationFirewallPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebApplicationFirewallPolicyListResult {
     #[doc = "List of WebApplicationFirewallPolicies within a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WebApplicationFirewallPolicy>,
     #[doc = "URL to get the next set of WebApplicationFirewallPolicy objects if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -23895,10 +26483,20 @@ pub struct WebApplicationFirewallPolicyPropertiesFormat {
     #[serde(rename = "policySettings", default, skip_serializing_if = "Option::is_none")]
     pub policy_settings: Option<PolicySettings>,
     #[doc = "The custom rules inside the policy."]
-    #[serde(rename = "customRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_rules: Vec<WebApplicationFirewallCustomRule>,
     #[doc = "A collection of references to application gateways."]
-    #[serde(rename = "applicationGateways", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationGateways",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_gateways: Vec<ApplicationGateway>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -23910,10 +26508,20 @@ pub struct WebApplicationFirewallPolicyPropertiesFormat {
     #[serde(rename = "managedRules")]
     pub managed_rules: ManagedRulesDefinition,
     #[doc = "A collection of references to application gateway http listeners."]
-    #[serde(rename = "httpListeners", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpListeners",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_listeners: Vec<SubResource>,
     #[doc = "A collection of references to application gateway path rules."]
-    #[serde(rename = "pathBasedRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pathBasedRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path_based_rules: Vec<SubResource>,
 }
 impl WebApplicationFirewallPolicyPropertiesFormat {
diff --git a/services/mgmt/networkfunction/src/package_2021_09_01_preview/models.rs b/services/mgmt/networkfunction/src/package_2021_09_01_preview/models.rs
index 349dfbfa28..badabfd22a 100644
--- a/services/mgmt/networkfunction/src/package_2021_09_01_preview/models.rs
+++ b/services/mgmt/networkfunction/src/package_2021_09_01_preview/models.rs
@@ -24,7 +24,11 @@ impl AzureTrafficCollector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureTrafficCollectorListResult {
     #[doc = "A list of Traffic Collector resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureTrafficCollector>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -45,7 +49,12 @@ impl AzureTrafficCollectorListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureTrafficCollectorPropertiesFormat {
     #[doc = "Collector Policies for Azure Traffic Collector."]
-    #[serde(rename = "collectorPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectorPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collector_policies: Vec<CollectorPolicy>,
     #[doc = "Resource reference properties."]
     #[serde(rename = "virtualHub", default, skip_serializing_if = "Option::is_none")]
@@ -90,7 +99,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -122,7 +135,11 @@ impl CollectorPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CollectorPolicyListResult {
     #[doc = "A list of collection policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CollectorPolicy>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -146,7 +163,12 @@ pub struct CollectorPolicyPropertiesFormat {
     #[serde(rename = "ingestionPolicy", default, skip_serializing_if = "Option::is_none")]
     pub ingestion_policy: Option<IngestionPolicyPropertiesFormat>,
     #[doc = "Emission policies."]
-    #[serde(rename = "emissionPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emissionPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emission_policies: Vec<EmissionPoliciesPropertiesFormat>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -164,7 +186,12 @@ pub struct EmissionPoliciesPropertiesFormat {
     #[serde(rename = "emissionType", default, skip_serializing_if = "Option::is_none")]
     pub emission_type: Option<emission_policies_properties_format::EmissionType>,
     #[doc = "Emission policy destinations."]
-    #[serde(rename = "emissionDestinations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emissionDestinations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emission_destinations: Vec<EmissionPolicyDestination>,
 }
 impl EmissionPoliciesPropertiesFormat {
@@ -268,7 +295,12 @@ pub struct IngestionPolicyPropertiesFormat {
     #[serde(rename = "ingestionType", default, skip_serializing_if = "Option::is_none")]
     pub ingestion_type: Option<ingestion_policy_properties_format::IngestionType>,
     #[doc = "Ingestion Sources."]
-    #[serde(rename = "ingestionSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ingestionSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ingestion_sources: Vec<IngestionSourcesPropertiesFormat>,
 }
 impl IngestionPolicyPropertiesFormat {
@@ -417,7 +449,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Azure Traffic Collector resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/networkfunction/src/package_2022_05_01/models.rs b/services/mgmt/networkfunction/src/package_2022_05_01/models.rs
index 349dfbfa28..badabfd22a 100644
--- a/services/mgmt/networkfunction/src/package_2022_05_01/models.rs
+++ b/services/mgmt/networkfunction/src/package_2022_05_01/models.rs
@@ -24,7 +24,11 @@ impl AzureTrafficCollector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureTrafficCollectorListResult {
     #[doc = "A list of Traffic Collector resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureTrafficCollector>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -45,7 +49,12 @@ impl AzureTrafficCollectorListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureTrafficCollectorPropertiesFormat {
     #[doc = "Collector Policies for Azure Traffic Collector."]
-    #[serde(rename = "collectorPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectorPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collector_policies: Vec<CollectorPolicy>,
     #[doc = "Resource reference properties."]
     #[serde(rename = "virtualHub", default, skip_serializing_if = "Option::is_none")]
@@ -90,7 +99,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -122,7 +135,11 @@ impl CollectorPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CollectorPolicyListResult {
     #[doc = "A list of collection policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CollectorPolicy>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -146,7 +163,12 @@ pub struct CollectorPolicyPropertiesFormat {
     #[serde(rename = "ingestionPolicy", default, skip_serializing_if = "Option::is_none")]
     pub ingestion_policy: Option<IngestionPolicyPropertiesFormat>,
     #[doc = "Emission policies."]
-    #[serde(rename = "emissionPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emissionPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emission_policies: Vec<EmissionPoliciesPropertiesFormat>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -164,7 +186,12 @@ pub struct EmissionPoliciesPropertiesFormat {
     #[serde(rename = "emissionType", default, skip_serializing_if = "Option::is_none")]
     pub emission_type: Option<emission_policies_properties_format::EmissionType>,
     #[doc = "Emission policy destinations."]
-    #[serde(rename = "emissionDestinations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emissionDestinations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emission_destinations: Vec<EmissionPolicyDestination>,
 }
 impl EmissionPoliciesPropertiesFormat {
@@ -268,7 +295,12 @@ pub struct IngestionPolicyPropertiesFormat {
     #[serde(rename = "ingestionType", default, skip_serializing_if = "Option::is_none")]
     pub ingestion_type: Option<ingestion_policy_properties_format::IngestionType>,
     #[doc = "Ingestion Sources."]
-    #[serde(rename = "ingestionSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ingestionSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ingestion_sources: Vec<IngestionSourcesPropertiesFormat>,
 }
 impl IngestionPolicyPropertiesFormat {
@@ -417,7 +449,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Azure Traffic Collector resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/networkfunction/src/package_2022_08_01/models.rs b/services/mgmt/networkfunction/src/package_2022_08_01/models.rs
index 40fc1c7cc6..3ba798a8b4 100644
--- a/services/mgmt/networkfunction/src/package_2022_08_01/models.rs
+++ b/services/mgmt/networkfunction/src/package_2022_08_01/models.rs
@@ -24,7 +24,11 @@ impl AzureTrafficCollector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureTrafficCollectorListResult {
     #[doc = "A list of Traffic Collector resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureTrafficCollector>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -45,7 +49,12 @@ impl AzureTrafficCollectorListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureTrafficCollectorPropertiesFormat {
     #[doc = "Collector Policies for Azure Traffic Collector."]
-    #[serde(rename = "collectorPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "collectorPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub collector_policies: Vec<CollectorPolicy>,
     #[doc = "Resource reference properties."]
     #[serde(rename = "virtualHub", default, skip_serializing_if = "Option::is_none")]
@@ -90,7 +99,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -119,7 +132,11 @@ impl CollectorPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CollectorPolicyListResult {
     #[doc = "A list of collection policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CollectorPolicy>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -143,7 +160,12 @@ pub struct CollectorPolicyPropertiesFormat {
     #[serde(rename = "ingestionPolicy", default, skip_serializing_if = "Option::is_none")]
     pub ingestion_policy: Option<IngestionPolicyPropertiesFormat>,
     #[doc = "Emission policies."]
-    #[serde(rename = "emissionPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emissionPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emission_policies: Vec<EmissionPoliciesPropertiesFormat>,
     #[doc = "The current provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -161,7 +183,12 @@ pub struct EmissionPoliciesPropertiesFormat {
     #[serde(rename = "emissionType", default, skip_serializing_if = "Option::is_none")]
     pub emission_type: Option<emission_policies_properties_format::EmissionType>,
     #[doc = "Emission policy destinations."]
-    #[serde(rename = "emissionDestinations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emissionDestinations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emission_destinations: Vec<EmissionPolicyDestination>,
 }
 impl EmissionPoliciesPropertiesFormat {
@@ -265,7 +292,12 @@ pub struct IngestionPolicyPropertiesFormat {
     #[serde(rename = "ingestionType", default, skip_serializing_if = "Option::is_none")]
     pub ingestion_type: Option<ingestion_policy_properties_format::IngestionType>,
     #[doc = "Ingestion Sources."]
-    #[serde(rename = "ingestionSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ingestionSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ingestion_sources: Vec<IngestionSourcesPropertiesFormat>,
 }
 impl IngestionPolicyPropertiesFormat {
@@ -414,7 +446,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Azure Traffic Collector resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/nginx/src/package_2021_05_01_preview/models.rs b/services/mgmt/nginx/src/package_2021_05_01_preview/models.rs
index efae81cbcf..ca3978ff4d 100644
--- a/services/mgmt/nginx/src/package_2021_05_01_preview/models.rs
+++ b/services/mgmt/nginx/src/package_2021_05_01_preview/models.rs
@@ -11,7 +11,11 @@ pub struct ErrorResponseBody {
     pub message: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -101,7 +105,11 @@ impl NginxCertificate {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NginxCertificateListResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NginxCertificate>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -172,7 +180,11 @@ impl NginxConfigurationFile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NginxConfigurationListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NginxConfiguration>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -203,9 +215,18 @@ impl NginxConfigurationPackage {
 pub struct NginxConfigurationProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<NginxConfigurationFile>,
-    #[serde(rename = "protectedFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_files: Vec<NginxConfigurationFile>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub package: Option<NginxConfigurationPackage>,
@@ -246,7 +267,11 @@ impl NginxDeployment {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NginxDeploymentListResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NginxDeployment>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -318,9 +343,19 @@ impl NginxDeploymentUpdateProperties {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NginxFrontendIpConfiguration {
-    #[serde(rename = "publicIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<NginxPublicIpAddress>,
-    #[serde(rename = "privateIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ip_addresses: Vec<NginxPrivateIpAddress>,
 }
 impl NginxFrontendIpConfiguration {
@@ -457,7 +492,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Nginx.NginxPlus provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/nginx/src/package_2022_08_01/models.rs b/services/mgmt/nginx/src/package_2022_08_01/models.rs
index efae81cbcf..ca3978ff4d 100644
--- a/services/mgmt/nginx/src/package_2022_08_01/models.rs
+++ b/services/mgmt/nginx/src/package_2022_08_01/models.rs
@@ -11,7 +11,11 @@ pub struct ErrorResponseBody {
     pub message: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -101,7 +105,11 @@ impl NginxCertificate {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NginxCertificateListResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NginxCertificate>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -172,7 +180,11 @@ impl NginxConfigurationFile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NginxConfigurationListResponse {
     #[doc = "Results of a list operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NginxConfiguration>,
     #[doc = "Link to the next set of results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -203,9 +215,18 @@ impl NginxConfigurationPackage {
 pub struct NginxConfigurationProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<NginxConfigurationFile>,
-    #[serde(rename = "protectedFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_files: Vec<NginxConfigurationFile>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub package: Option<NginxConfigurationPackage>,
@@ -246,7 +267,11 @@ impl NginxDeployment {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NginxDeploymentListResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NginxDeployment>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -318,9 +343,19 @@ impl NginxDeploymentUpdateProperties {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NginxFrontendIpConfiguration {
-    #[serde(rename = "publicIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_ip_addresses: Vec<NginxPublicIpAddress>,
-    #[serde(rename = "privateIPAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateIPAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_ip_addresses: Vec<NginxPrivateIpAddress>,
 }
 impl NginxFrontendIpConfiguration {
@@ -457,7 +492,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Nginx.NginxPlus provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/notificationhubs/src/package_2014_09/models.rs b/services/mgmt/notificationhubs/src/package_2014_09/models.rs
index 721053dd9d..2f3e40bf4e 100644
--- a/services/mgmt/notificationhubs/src/package_2014_09/models.rs
+++ b/services/mgmt/notificationhubs/src/package_2014_09/models.rs
@@ -229,7 +229,11 @@ impl NamespaceCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NamespaceListResult {
     #[doc = "Gets or sets result of the List Namespace operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NamespaceResource>,
     #[doc = "Gets or sets link to the next set of results. Not empty if Value contains incomplete list of Namespaces"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -348,7 +352,11 @@ impl NotificationHubCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationHubListResult {
     #[doc = "Gets or sets result of the List NotificationHub operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotificationHubResource>,
     #[doc = "Gets or sets link to the next set of results. Not empty if Value contains incomplete list of NotificationHub"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -375,7 +383,12 @@ pub struct NotificationHubProperties {
     #[serde(rename = "registrationTtl", default, skip_serializing_if = "Option::is_none")]
     pub registration_ttl: Option<String>,
     #[doc = "The AuthorizationRules of the created NotificationHub"]
-    #[serde(rename = "authorizationRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_rules: Vec<SharedAccessAuthorizationRuleProperties>,
     #[doc = "Description of a NotificationHub ApnsCredential."]
     #[serde(rename = "apnsCredential", default, skip_serializing_if = "Option::is_none")]
@@ -496,7 +509,11 @@ impl SharedAccessAuthorizationRuleCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedAccessAuthorizationRuleListResult {
     #[doc = "Gets or sets result of the List AuthorizationRules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedAccessAuthorizationRuleResource>,
     #[doc = "Gets or sets link to the next set of results. Not empty if Value contains incomplete list of AuthorizationRules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -532,7 +549,11 @@ pub struct SharedAccessAuthorizationRuleProperties {
     #[serde(rename = "claimValue", default, skip_serializing_if = "Option::is_none")]
     pub claim_value: Option<String>,
     #[doc = "The rights associated with the rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rights: Vec<String>,
     #[doc = "The time at which the authorization rule was created."]
     #[serde(rename = "createdTime", default, with = "azure_core::date::rfc3339::option")]
diff --git a/services/mgmt/notificationhubs/src/package_2016_03/models.rs b/services/mgmt/notificationhubs/src/package_2016_03/models.rs
index 98482256cc..23357e13d3 100644
--- a/services/mgmt/notificationhubs/src/package_2016_03/models.rs
+++ b/services/mgmt/notificationhubs/src/package_2016_03/models.rs
@@ -227,7 +227,11 @@ impl NamespaceCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NamespaceListResult {
     #[doc = "Result of the List Namespace operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NamespaceResource>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Namespaces"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -344,7 +348,11 @@ impl NotificationHubCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationHubListResult {
     #[doc = "Result of the List NotificationHub operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotificationHubResource>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of NotificationHub"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -371,7 +379,12 @@ pub struct NotificationHubProperties {
     #[serde(rename = "registrationTtl", default, skip_serializing_if = "Option::is_none")]
     pub registration_ttl: Option<String>,
     #[doc = "The AuthorizationRules of the created NotificationHub"]
-    #[serde(rename = "authorizationRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_rules: Vec<SharedAccessAuthorizationRuleProperties>,
     #[doc = "Description of a NotificationHub ApnsCredential."]
     #[serde(rename = "apnsCredential", default, skip_serializing_if = "Option::is_none")]
@@ -543,7 +556,11 @@ impl SharedAccessAuthorizationRuleCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedAccessAuthorizationRuleListResult {
     #[doc = "Result of the List AuthorizationRules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedAccessAuthorizationRuleResource>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of AuthorizationRules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -564,7 +581,11 @@ impl SharedAccessAuthorizationRuleListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedAccessAuthorizationRuleProperties {
     #[doc = "The rights associated with the rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rights: Vec<String>,
 }
 impl SharedAccessAuthorizationRuleProperties {
diff --git a/services/mgmt/notificationhubs/src/package_2017_04/models.rs b/services/mgmt/notificationhubs/src/package_2017_04/models.rs
index bbcaf16673..dc40f09a22 100644
--- a/services/mgmt/notificationhubs/src/package_2017_04/models.rs
+++ b/services/mgmt/notificationhubs/src/package_2017_04/models.rs
@@ -296,7 +296,11 @@ impl NamespaceCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NamespaceListResult {
     #[doc = "Result of the List Namespace operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NamespaceResource>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Namespaces"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -422,7 +426,11 @@ impl NotificationHubCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationHubListResult {
     #[doc = "Result of the List NotificationHub operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotificationHubResource>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of NotificationHub"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -463,7 +471,12 @@ pub struct NotificationHubProperties {
     #[serde(rename = "registrationTtl", default, skip_serializing_if = "Option::is_none")]
     pub registration_ttl: Option<String>,
     #[doc = "The AuthorizationRules of the created NotificationHub"]
-    #[serde(rename = "authorizationRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_rules: Vec<SharedAccessAuthorizationRuleProperties>,
     #[doc = "Description of a NotificationHub ApnsCredential."]
     #[serde(rename = "apnsCredential", default, skip_serializing_if = "Option::is_none")]
@@ -543,7 +556,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of NotificationHubs operations supported by the Microsoft.NotificationHubs resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -678,7 +695,11 @@ impl SharedAccessAuthorizationRuleCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedAccessAuthorizationRuleListResult {
     #[doc = "Result of the List AuthorizationRules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedAccessAuthorizationRuleResource>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of AuthorizationRules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -699,7 +720,11 @@ impl SharedAccessAuthorizationRuleListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedAccessAuthorizationRuleProperties {
     #[doc = "The rights associated with the rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rights: Vec<String>,
     #[doc = "A base64-encoded 256-bit primary key for signing and validating the SAS token."]
     #[serde(rename = "primaryKey", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/oep/src/package_2021_06_01_preview/models.rs b/services/mgmt/oep/src/package_2021_06_01_preview/models.rs
index af3385ebf2..59503da3c8 100644
--- a/services/mgmt/oep/src/package_2021_06_01_preview/models.rs
+++ b/services/mgmt/oep/src/package_2021_06_01_preview/models.rs
@@ -128,7 +128,11 @@ pub struct EnergyServiceList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of oep resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnergyService>,
 }
 impl azure_core::Continuable for EnergyServiceList {
@@ -150,7 +154,12 @@ pub struct EnergyServiceProperties {
     pub provisioning_state: Option<energy_service_properties::ProvisioningState>,
     #[serde(rename = "authAppId", default, skip_serializing_if = "Option::is_none")]
     pub auth_app_id: Option<String>,
-    #[serde(rename = "dataPartitionNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataPartitionNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_partition_names: Vec<DataPartitionNames>,
 }
 impl EnergyServiceProperties {
@@ -235,10 +244,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -387,7 +405,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/oep/src/package_2022_04_04_preview/models.rs b/services/mgmt/oep/src/package_2022_04_04_preview/models.rs
index 38aa8e6d95..28e1b955e9 100644
--- a/services/mgmt/oep/src/package_2022_04_04_preview/models.rs
+++ b/services/mgmt/oep/src/package_2022_04_04_preview/models.rs
@@ -117,7 +117,12 @@ impl DataPartitionProperties {
 #[doc = "List of data partitions"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataPartitionsList {
-    #[serde(rename = "dataPartitionNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataPartitionNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_partition_names: Vec<DataPartitionNames>,
 }
 impl DataPartitionsList {
@@ -129,7 +134,12 @@ impl DataPartitionsList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataPartitionsListResult {
     #[doc = "List of data partitions along with their properties in a given OEP resource."]
-    #[serde(rename = "dataPartitionInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataPartitionInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_partition_info: Vec<DataPartitionProperties>,
 }
 impl DataPartitionsListResult {
@@ -178,7 +188,11 @@ pub struct EnergyServiceList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of oep resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnergyService>,
 }
 impl azure_core::Continuable for EnergyServiceList {
@@ -200,7 +214,12 @@ pub struct EnergyServiceProperties {
     pub provisioning_state: Option<energy_service_properties::ProvisioningState>,
     #[serde(rename = "authAppId", default, skip_serializing_if = "Option::is_none")]
     pub auth_app_id: Option<String>,
-    #[serde(rename = "dataPartitionNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataPartitionNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_partition_names: Vec<DataPartitionNames>,
 }
 impl EnergyServiceProperties {
@@ -285,10 +304,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -443,7 +471,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/operationalinsights/src/package_2020_03_preview/models.rs b/services/mgmt/operationalinsights/src/package_2020_03_preview/models.rs
index da5731a2b7..298db23a80 100644
--- a/services/mgmt/operationalinsights/src/package_2020_03_preview/models.rs
+++ b/services/mgmt/operationalinsights/src/package_2020_03_preview/models.rs
@@ -148,7 +148,11 @@ pub struct ClusterListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of Log Analytics clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
 }
 impl azure_core::Continuable for ClusterListResult {
@@ -364,7 +368,11 @@ impl DataCollectorLogProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataCollectorLogsListResult {
     #[doc = "data collector log collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataCollectorLog>,
 }
 impl azure_core::Continuable for DataCollectorLogsListResult {
@@ -414,7 +422,11 @@ impl DataExportErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataExportListResult {
     #[doc = "List of data export instances within a workspace.."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataExport>,
 }
 impl azure_core::Continuable for DataExportListResult {
@@ -619,7 +631,11 @@ impl Serialize for DataSourceKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataSourceListResult {
     #[doc = "A list of datasources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataSource>,
     #[doc = "The link (url) to the next page of datasources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -756,10 +772,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -840,7 +865,11 @@ impl LinkedService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinkedServiceListResult {
     #[doc = "The list of linked service instances"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkedService>,
 }
 impl azure_core::Continuable for LinkedServiceListResult {
@@ -920,7 +949,11 @@ pub mod linked_service_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinkedStorageAccountsListResult {
     #[doc = "A list of linked storage accounts instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkedStorageAccountsResource>,
 }
 impl azure_core::Continuable for LinkedStorageAccountsListResult {
@@ -941,7 +974,12 @@ pub struct LinkedStorageAccountsProperties {
     #[serde(rename = "dataSourceType", default, skip_serializing_if = "Option::is_none")]
     pub data_source_type: Option<linked_storage_accounts_properties::DataSourceType>,
     #[doc = "Linked storage accounts resources ids."]
-    #[serde(rename = "storageAccountIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccountIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_account_ids: Vec<String>,
 }
 impl LinkedStorageAccountsProperties {
@@ -1088,7 +1126,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of solution operations supported by the OperationsManagement resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1258,7 +1300,11 @@ pub struct SavedSearchProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<i64>,
     #[doc = "The tags attached to the saved search."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<Tag>,
 }
 impl SavedSearchProperties {
@@ -1278,7 +1324,11 @@ impl SavedSearchProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SavedSearchesListResult {
     #[doc = "The array of result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SavedSearch>,
 }
 impl SavedSearchesListResult {
@@ -1293,7 +1343,11 @@ pub struct SearchGetSchemaResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<SearchMetadata>,
     #[doc = "The array of result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SearchSchemaValue>,
 }
 impl SearchGetSchemaResponse {
@@ -1320,7 +1374,12 @@ pub struct SearchMetadata {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "The core summaries."]
-    #[serde(rename = "coreSummaries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "coreSummaries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub core_summaries: Vec<CoreSummary>,
     #[doc = "The status of the search results."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1335,7 +1394,11 @@ pub struct SearchMetadata {
     #[serde(rename = "eTag", default, skip_serializing_if = "Option::is_none")]
     pub e_tag: Option<String>,
     #[doc = "How the results are sorted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sort: Vec<SearchSort>,
     #[doc = "The request time."]
     #[serde(rename = "requestTime", default, skip_serializing_if = "Option::is_none")]
@@ -1395,7 +1458,12 @@ pub struct SearchSchemaValue {
     #[doc = "The boolean that indicates whether or not the field is a facet."]
     pub facet: bool,
     #[doc = "The array of workflows containing the field."]
-    #[serde(rename = "ownerType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ownerType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub owner_type: Vec<String>,
 }
 impl SearchSchemaValue {
@@ -1520,7 +1588,11 @@ impl StorageInsight {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageInsightListResult {
     #[doc = "A list of storage insight items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageInsight>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1541,10 +1613,18 @@ impl StorageInsightListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct StorageInsightProperties {
     #[doc = "The names of the blob containers that the workspace should read"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub containers: Vec<String>,
     #[doc = "The names of the Azure tables that the workspace should read"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<String>,
     #[doc = "Describes a storage account connection."]
     #[serde(rename = "storageAccount")]
@@ -1649,7 +1729,11 @@ impl TableProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TablesListResult {
     #[doc = "A list of data tables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Table>,
 }
 impl azure_core::Continuable for TablesListResult {
@@ -1814,7 +1898,11 @@ pub mod workspace_capping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListManagementGroupsResult {
     #[doc = "Gets or sets a list of management groups attached to the workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagementGroup>,
 }
 impl azure_core::Continuable for WorkspaceListManagementGroupsResult {
@@ -1832,7 +1920,11 @@ impl WorkspaceListManagementGroupsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "A list of workspaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
 }
 impl azure_core::Continuable for WorkspaceListResult {
@@ -1850,7 +1942,11 @@ impl WorkspaceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListUsagesResult {
     #[doc = "Gets or sets a list of usage metrics for a workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UsageMetric>,
 }
 impl azure_core::Continuable for WorkspaceListUsagesResult {
@@ -1906,7 +2002,12 @@ pub struct WorkspaceProperties {
     #[serde(rename = "publicNetworkAccessForQuery", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access_for_query: Option<PublicNetworkAccessType>,
     #[doc = "List of linked private link scope resources."]
-    #[serde(rename = "privateLinkScopedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkScopedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_scoped_resources: Vec<PrivateLinkScopedResource>,
 }
 impl WorkspaceProperties {
diff --git a/services/mgmt/operationalinsights/src/package_2020_08/models.rs b/services/mgmt/operationalinsights/src/package_2020_08/models.rs
index d4479b79ec..bbe561c610 100644
--- a/services/mgmt/operationalinsights/src/package_2020_08/models.rs
+++ b/services/mgmt/operationalinsights/src/package_2020_08/models.rs
@@ -130,7 +130,11 @@ pub struct ClusterListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of Log Analytics clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
 }
 impl azure_core::Continuable for ClusterListResult {
@@ -334,7 +338,11 @@ impl DataExport {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataExportListResult {
     #[doc = "List of data export instances within a workspace.."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataExport>,
 }
 impl azure_core::Continuable for DataExportListResult {
@@ -539,7 +547,11 @@ impl Serialize for DataSourceKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataSourceListResult {
     #[doc = "A list of datasources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataSource>,
     #[doc = "The link (url) to the next page of datasources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -658,10 +670,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -760,7 +781,11 @@ impl LinkedService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinkedServiceListResult {
     #[doc = "The list of linked service instances"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkedService>,
 }
 impl azure_core::Continuable for LinkedServiceListResult {
@@ -840,7 +865,11 @@ pub mod linked_service_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinkedStorageAccountsListResult {
     #[doc = "A list of linked storage accounts instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkedStorageAccountsResource>,
 }
 impl azure_core::Continuable for LinkedStorageAccountsListResult {
@@ -861,7 +890,12 @@ pub struct LinkedStorageAccountsProperties {
     #[serde(rename = "dataSourceType", default, skip_serializing_if = "Option::is_none")]
     pub data_source_type: Option<linked_storage_accounts_properties::DataSourceType>,
     #[doc = "Linked storage accounts resources ids."]
-    #[serde(rename = "storageAccountIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccountIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_account_ids: Vec<String>,
 }
 impl LinkedStorageAccountsProperties {
@@ -1008,7 +1042,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of solution operations supported by the OperationsManagement resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1178,7 +1216,11 @@ pub struct SavedSearchProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<i64>,
     #[doc = "The tags attached to the saved search."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<Tag>,
 }
 impl SavedSearchProperties {
@@ -1198,7 +1240,11 @@ impl SavedSearchProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SavedSearchesListResult {
     #[doc = "The array of result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SavedSearch>,
 }
 impl SavedSearchesListResult {
@@ -1213,7 +1259,11 @@ pub struct SearchGetSchemaResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<SearchMetadata>,
     #[doc = "The array of result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SearchSchemaValue>,
 }
 impl SearchGetSchemaResponse {
@@ -1240,7 +1290,12 @@ pub struct SearchMetadata {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "The core summaries."]
-    #[serde(rename = "coreSummaries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "coreSummaries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub core_summaries: Vec<CoreSummary>,
     #[doc = "The status of the search results."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1255,7 +1310,11 @@ pub struct SearchMetadata {
     #[serde(rename = "eTag", default, skip_serializing_if = "Option::is_none")]
     pub e_tag: Option<String>,
     #[doc = "How the results are sorted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sort: Vec<SearchSort>,
     #[doc = "The request time."]
     #[serde(rename = "requestTime", default, skip_serializing_if = "Option::is_none")]
@@ -1315,7 +1374,12 @@ pub struct SearchSchemaValue {
     #[doc = "The boolean that indicates whether or not the field is a facet."]
     pub facet: bool,
     #[doc = "The array of workflows containing the field."]
-    #[serde(rename = "ownerType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ownerType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub owner_type: Vec<String>,
 }
 impl SearchSchemaValue {
@@ -1440,7 +1504,11 @@ impl StorageInsight {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageInsightListResult {
     #[doc = "A list of storage insight items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageInsight>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1461,10 +1529,18 @@ impl StorageInsightListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct StorageInsightProperties {
     #[doc = "The names of the blob containers that the workspace should read"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub containers: Vec<String>,
     #[doc = "The names of the Azure tables that the workspace should read"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<String>,
     #[doc = "Describes a storage account connection."]
     #[serde(rename = "storageAccount")]
@@ -1569,7 +1645,11 @@ impl TableProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TablesListResult {
     #[doc = "A list of data tables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Table>,
 }
 impl azure_core::Continuable for TablesListResult {
@@ -1742,7 +1822,11 @@ impl WorkspaceFeatures {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListManagementGroupsResult {
     #[doc = "Gets or sets a list of management groups attached to the workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagementGroup>,
 }
 impl azure_core::Continuable for WorkspaceListManagementGroupsResult {
@@ -1760,7 +1844,11 @@ impl WorkspaceListManagementGroupsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "A list of workspaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
 }
 impl azure_core::Continuable for WorkspaceListResult {
@@ -1778,7 +1866,11 @@ impl WorkspaceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListUsagesResult {
     #[doc = "Gets or sets a list of usage metrics for a workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UsageMetric>,
 }
 impl azure_core::Continuable for WorkspaceListUsagesResult {
@@ -1843,7 +1935,12 @@ pub struct WorkspaceProperties {
     #[serde(rename = "forceCmkForQuery", default, skip_serializing_if = "Option::is_none")]
     pub force_cmk_for_query: Option<bool>,
     #[doc = "List of linked private link scope resources."]
-    #[serde(rename = "privateLinkScopedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkScopedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_scoped_resources: Vec<PrivateLinkScopedResource>,
     #[doc = "Workspace features."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/operationalinsights/src/package_2020_10/models.rs b/services/mgmt/operationalinsights/src/package_2020_10/models.rs
index 45834b7de5..7427498772 100644
--- a/services/mgmt/operationalinsights/src/package_2020_10/models.rs
+++ b/services/mgmt/operationalinsights/src/package_2020_10/models.rs
@@ -166,7 +166,11 @@ pub struct ClusterListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of Log Analytics clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
 }
 impl azure_core::Continuable for ClusterListResult {
@@ -244,7 +248,12 @@ pub struct ClusterProperties {
     #[serde(rename = "createdDate", default, skip_serializing_if = "Option::is_none")]
     pub created_date: Option<String>,
     #[doc = "The list of Log Analytics workspaces associated with the cluster"]
-    #[serde(rename = "associatedWorkspaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "associatedWorkspaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub associated_workspaces: Vec<AssociatedWorkspace>,
     #[doc = "The Capacity Reservation properties."]
     #[serde(rename = "capacityReservationProperties", default, skip_serializing_if = "Option::is_none")]
@@ -394,7 +403,11 @@ impl DataExport {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataExportListResult {
     #[doc = "List of data export instances within a workspace.."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataExport>,
 }
 impl azure_core::Continuable for DataExportListResult {
@@ -599,7 +612,11 @@ impl Serialize for DataSourceKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataSourceListResult {
     #[doc = "A list of datasources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataSource>,
     #[doc = "The link (url) to the next page of datasources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -718,10 +735,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -825,7 +851,11 @@ impl LinkedService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinkedServiceListResult {
     #[doc = "The list of linked service instances"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkedService>,
 }
 impl azure_core::Continuable for LinkedServiceListResult {
@@ -905,7 +935,11 @@ pub mod linked_service_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinkedStorageAccountsListResult {
     #[doc = "A list of linked storage accounts instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkedStorageAccountsResource>,
 }
 impl azure_core::Continuable for LinkedStorageAccountsListResult {
@@ -926,7 +960,12 @@ pub struct LinkedStorageAccountsProperties {
     #[serde(rename = "dataSourceType", default, skip_serializing_if = "Option::is_none")]
     pub data_source_type: Option<linked_storage_accounts_properties::DataSourceType>,
     #[doc = "Linked storage accounts resources ids."]
-    #[serde(rename = "storageAccountIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccountIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_account_ids: Vec<String>,
 }
 impl LinkedStorageAccountsProperties {
@@ -1073,7 +1112,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of solution operations supported by the OperationsManagement resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1243,7 +1286,11 @@ pub struct SavedSearchProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<i64>,
     #[doc = "The tags attached to the saved search."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<Tag>,
 }
 impl SavedSearchProperties {
@@ -1263,7 +1310,11 @@ impl SavedSearchProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SavedSearchesListResult {
     #[doc = "The array of result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SavedSearch>,
 }
 impl SavedSearchesListResult {
@@ -1278,7 +1329,11 @@ pub struct SearchGetSchemaResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<SearchMetadata>,
     #[doc = "The array of result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SearchSchemaValue>,
 }
 impl SearchGetSchemaResponse {
@@ -1305,7 +1360,12 @@ pub struct SearchMetadata {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "The core summaries."]
-    #[serde(rename = "coreSummaries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "coreSummaries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub core_summaries: Vec<CoreSummary>,
     #[doc = "The status of the search results."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1320,7 +1380,11 @@ pub struct SearchMetadata {
     #[serde(rename = "eTag", default, skip_serializing_if = "Option::is_none")]
     pub e_tag: Option<String>,
     #[doc = "How the results are sorted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sort: Vec<SearchSort>,
     #[doc = "The request time."]
     #[serde(rename = "requestTime", default, skip_serializing_if = "Option::is_none")]
@@ -1380,7 +1444,12 @@ pub struct SearchSchemaValue {
     #[doc = "The boolean that indicates whether or not the field is a facet."]
     pub facet: bool,
     #[doc = "The array of workflows containing the field."]
-    #[serde(rename = "ownerType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ownerType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub owner_type: Vec<String>,
 }
 impl SearchSchemaValue {
@@ -1505,7 +1574,11 @@ impl StorageInsight {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageInsightListResult {
     #[doc = "A list of storage insight items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageInsight>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1526,10 +1599,18 @@ impl StorageInsightListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct StorageInsightProperties {
     #[doc = "The names of the blob containers that the workspace should read"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub containers: Vec<String>,
     #[doc = "The names of the Azure tables that the workspace should read"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<String>,
     #[doc = "Describes a storage account connection."]
     #[serde(rename = "storageAccount")]
@@ -1634,7 +1715,11 @@ impl TableProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TablesListResult {
     #[doc = "A list of data tables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Table>,
 }
 impl azure_core::Continuable for TablesListResult {
@@ -1842,7 +1927,11 @@ impl WorkspaceFeatures {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListManagementGroupsResult {
     #[doc = "Gets or sets a list of management groups attached to the workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagementGroup>,
 }
 impl azure_core::Continuable for WorkspaceListManagementGroupsResult {
@@ -1860,7 +1949,11 @@ impl WorkspaceListManagementGroupsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "A list of workspaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
 }
 impl azure_core::Continuable for WorkspaceListResult {
@@ -1878,7 +1971,11 @@ impl WorkspaceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListUsagesResult {
     #[doc = "Gets or sets a list of usage metrics for a workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UsageMetric>,
 }
 impl azure_core::Continuable for WorkspaceListUsagesResult {
@@ -1943,7 +2040,12 @@ pub struct WorkspaceProperties {
     #[serde(rename = "forceCmkForQuery", default, skip_serializing_if = "Option::is_none")]
     pub force_cmk_for_query: Option<bool>,
     #[doc = "List of linked private link scope resources."]
-    #[serde(rename = "privateLinkScopedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkScopedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_scoped_resources: Vec<PrivateLinkScopedResource>,
     #[doc = "Workspace features."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/operationalinsights/src/package_2021_06/models.rs b/services/mgmt/operationalinsights/src/package_2021_06/models.rs
index 03957ce09c..fd3035f6db 100644
--- a/services/mgmt/operationalinsights/src/package_2021_06/models.rs
+++ b/services/mgmt/operationalinsights/src/package_2021_06/models.rs
@@ -166,7 +166,11 @@ pub struct ClusterListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of Log Analytics clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
 }
 impl azure_core::Continuable for ClusterListResult {
@@ -244,7 +248,12 @@ pub struct ClusterProperties {
     #[serde(rename = "createdDate", default, skip_serializing_if = "Option::is_none")]
     pub created_date: Option<String>,
     #[doc = "The list of Log Analytics workspaces associated with the cluster"]
-    #[serde(rename = "associatedWorkspaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "associatedWorkspaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub associated_workspaces: Vec<AssociatedWorkspace>,
     #[doc = "The Capacity Reservation properties."]
     #[serde(rename = "capacityReservationProperties", default, skip_serializing_if = "Option::is_none")]
@@ -397,7 +406,11 @@ impl DataExport {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataExportListResult {
     #[doc = "List of data export instances within a workspace.."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataExport>,
 }
 impl azure_core::Continuable for DataExportListResult {
@@ -602,7 +615,11 @@ impl Serialize for DataSourceKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataSourceListResult {
     #[doc = "A list of datasources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataSource>,
     #[doc = "The link (url) to the next page of datasources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -721,10 +738,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -828,7 +854,11 @@ impl LinkedService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinkedServiceListResult {
     #[doc = "The list of linked service instances"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkedService>,
 }
 impl azure_core::Continuable for LinkedServiceListResult {
@@ -908,7 +938,11 @@ pub mod linked_service_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinkedStorageAccountsListResult {
     #[doc = "A list of linked storage accounts instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkedStorageAccountsResource>,
 }
 impl azure_core::Continuable for LinkedStorageAccountsListResult {
@@ -929,7 +963,12 @@ pub struct LinkedStorageAccountsProperties {
     #[serde(rename = "dataSourceType", default, skip_serializing_if = "Option::is_none")]
     pub data_source_type: Option<linked_storage_accounts_properties::DataSourceType>,
     #[doc = "Linked storage accounts resources ids."]
-    #[serde(rename = "storageAccountIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccountIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_account_ids: Vec<String>,
 }
 impl LinkedStorageAccountsProperties {
@@ -1076,7 +1115,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of solution operations supported by the OperationsManagement resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1246,7 +1289,11 @@ pub struct SavedSearchProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<i64>,
     #[doc = "The tags attached to the saved search."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<Tag>,
 }
 impl SavedSearchProperties {
@@ -1266,7 +1313,11 @@ impl SavedSearchProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SavedSearchesListResult {
     #[doc = "The array of result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SavedSearch>,
 }
 impl SavedSearchesListResult {
@@ -1281,7 +1332,11 @@ pub struct SearchGetSchemaResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<SearchMetadata>,
     #[doc = "The array of result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SearchSchemaValue>,
 }
 impl SearchGetSchemaResponse {
@@ -1308,7 +1363,12 @@ pub struct SearchMetadata {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "The core summaries."]
-    #[serde(rename = "coreSummaries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "coreSummaries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub core_summaries: Vec<CoreSummary>,
     #[doc = "The status of the search results."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1323,7 +1383,11 @@ pub struct SearchMetadata {
     #[serde(rename = "eTag", default, skip_serializing_if = "Option::is_none")]
     pub e_tag: Option<String>,
     #[doc = "How the results are sorted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sort: Vec<SearchSort>,
     #[doc = "The request time."]
     #[serde(rename = "requestTime", default, skip_serializing_if = "Option::is_none")]
@@ -1383,7 +1447,12 @@ pub struct SearchSchemaValue {
     #[doc = "The boolean that indicates whether or not the field is a facet."]
     pub facet: bool,
     #[doc = "The array of workflows containing the field."]
-    #[serde(rename = "ownerType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ownerType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub owner_type: Vec<String>,
 }
 impl SearchSchemaValue {
@@ -1508,7 +1577,11 @@ impl StorageInsight {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageInsightListResult {
     #[doc = "A list of storage insight items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageInsight>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1529,10 +1602,18 @@ impl StorageInsightListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct StorageInsightProperties {
     #[doc = "The names of the blob containers that the workspace should read"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub containers: Vec<String>,
     #[doc = "The names of the Azure tables that the workspace should read"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<String>,
     #[doc = "Describes a storage account connection."]
     #[serde(rename = "storageAccount")]
@@ -1637,7 +1718,11 @@ impl TableProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TablesListResult {
     #[doc = "A list of data tables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Table>,
 }
 impl azure_core::Continuable for TablesListResult {
@@ -1845,7 +1930,11 @@ impl WorkspaceFeatures {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListManagementGroupsResult {
     #[doc = "Gets or sets a list of management groups attached to the workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagementGroup>,
 }
 impl azure_core::Continuable for WorkspaceListManagementGroupsResult {
@@ -1863,7 +1952,11 @@ impl WorkspaceListManagementGroupsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "A list of workspaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
 }
 impl azure_core::Continuable for WorkspaceListResult {
@@ -1881,7 +1974,11 @@ impl WorkspaceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListUsagesResult {
     #[doc = "Gets or sets a list of usage metrics for a workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UsageMetric>,
 }
 impl azure_core::Continuable for WorkspaceListUsagesResult {
@@ -1946,7 +2043,12 @@ pub struct WorkspaceProperties {
     #[serde(rename = "forceCmkForQuery", default, skip_serializing_if = "Option::is_none")]
     pub force_cmk_for_query: Option<bool>,
     #[doc = "List of linked private link scope resources."]
-    #[serde(rename = "privateLinkScopedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkScopedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_scoped_resources: Vec<PrivateLinkScopedResource>,
     #[doc = "Workspace features."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/operationalinsights/src/package_2021_12_01_preview/models.rs b/services/mgmt/operationalinsights/src/package_2021_12_01_preview/models.rs
index 762fa634f3..b0a890084d 100644
--- a/services/mgmt/operationalinsights/src/package_2021_12_01_preview/models.rs
+++ b/services/mgmt/operationalinsights/src/package_2021_12_01_preview/models.rs
@@ -166,7 +166,11 @@ pub struct ClusterListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of Log Analytics clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
 }
 impl azure_core::Continuable for ClusterListResult {
@@ -244,7 +248,12 @@ pub struct ClusterProperties {
     #[serde(rename = "createdDate", default, skip_serializing_if = "Option::is_none")]
     pub created_date: Option<String>,
     #[doc = "The list of Log Analytics workspaces associated with the cluster"]
-    #[serde(rename = "associatedWorkspaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "associatedWorkspaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub associated_workspaces: Vec<AssociatedWorkspace>,
     #[doc = "The Capacity Reservation properties."]
     #[serde(rename = "capacityReservationProperties", default, skip_serializing_if = "Option::is_none")]
@@ -532,7 +541,11 @@ impl DataExport {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataExportListResult {
     #[doc = "List of data export instances within a workspace.."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataExport>,
 }
 impl azure_core::Continuable for DataExportListResult {
@@ -737,7 +750,11 @@ impl Serialize for DataSourceKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataSourceListResult {
     #[doc = "A list of datasources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataSource>,
     #[doc = "The link (url) to the next page of datasources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -856,10 +873,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -963,7 +989,11 @@ impl LinkedService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinkedServiceListResult {
     #[doc = "The list of linked service instances"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkedService>,
 }
 impl azure_core::Continuable for LinkedServiceListResult {
@@ -1043,7 +1073,11 @@ pub mod linked_service_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LinkedStorageAccountsListResult {
     #[doc = "A list of linked storage accounts instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkedStorageAccountsResource>,
 }
 impl azure_core::Continuable for LinkedStorageAccountsListResult {
@@ -1064,7 +1098,12 @@ pub struct LinkedStorageAccountsProperties {
     #[serde(rename = "dataSourceType", default, skip_serializing_if = "Option::is_none")]
     pub data_source_type: Option<linked_storage_accounts_properties::DataSourceType>,
     #[doc = "Linked storage accounts resources ids."]
-    #[serde(rename = "storageAccountIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccountIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_account_ids: Vec<String>,
 }
 impl LinkedStorageAccountsProperties {
@@ -1211,7 +1250,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of solution operations supported by the OperationsManagement resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1414,7 +1457,11 @@ pub struct SavedSearchProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<i64>,
     #[doc = "The tags attached to the saved search."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<Tag>,
 }
 impl SavedSearchProperties {
@@ -1434,7 +1481,11 @@ impl SavedSearchProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SavedSearchesListResult {
     #[doc = "The array of result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SavedSearch>,
 }
 impl SavedSearchesListResult {
@@ -1455,16 +1506,33 @@ pub struct Schema {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "A list of table custom columns."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<Column>,
     #[doc = "A list of table standard columns."]
-    #[serde(rename = "standardColumns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "standardColumns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub standard_columns: Vec<Column>,
     #[doc = "Table category."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub categories: Vec<String>,
     #[doc = "Table labels."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "Table's creator."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1476,7 +1544,11 @@ pub struct Schema {
     #[serde(rename = "tableSubType", default, skip_serializing_if = "Option::is_none")]
     pub table_sub_type: Option<schema::TableSubType>,
     #[doc = "List of solutions the table is affiliated with"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub solutions: Vec<String>,
     #[doc = "Parameters of the search job that initiated this table."]
     #[serde(rename = "searchResults", default, skip_serializing_if = "Option::is_none")]
@@ -1619,7 +1691,11 @@ pub struct SearchGetSchemaResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<SearchMetadata>,
     #[doc = "The array of result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SearchSchemaValue>,
 }
 impl SearchGetSchemaResponse {
@@ -1646,7 +1722,12 @@ pub struct SearchMetadata {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "The core summaries."]
-    #[serde(rename = "coreSummaries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "coreSummaries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub core_summaries: Vec<CoreSummary>,
     #[doc = "The status of the search results."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1661,7 +1742,11 @@ pub struct SearchMetadata {
     #[serde(rename = "eTag", default, skip_serializing_if = "Option::is_none")]
     pub e_tag: Option<String>,
     #[doc = "How the results are sorted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sort: Vec<SearchSort>,
     #[doc = "The request time."]
     #[serde(rename = "requestTime", default, skip_serializing_if = "Option::is_none")]
@@ -1748,7 +1833,12 @@ pub struct SearchSchemaValue {
     #[doc = "The boolean that indicates whether or not the field is a facet."]
     pub facet: bool,
     #[doc = "The array of workflows containing the field."]
-    #[serde(rename = "ownerType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ownerType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub owner_type: Vec<String>,
 }
 impl SearchSchemaValue {
@@ -1873,7 +1963,11 @@ impl StorageInsight {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageInsightListResult {
     #[doc = "A list of storage insight items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageInsight>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1894,10 +1988,18 @@ impl StorageInsightListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct StorageInsightProperties {
     #[doc = "The names of the blob containers that the workspace should read"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub containers: Vec<String>,
     #[doc = "The names of the Azure tables that the workspace should read"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<String>,
     #[doc = "Describes a storage account connection."]
     #[serde(rename = "storageAccount")]
@@ -2111,7 +2213,11 @@ pub mod table_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TablesListResult {
     #[doc = "A list of data tables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Table>,
 }
 impl azure_core::Continuable for TablesListResult {
@@ -2323,7 +2429,11 @@ impl WorkspaceFeatures {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListManagementGroupsResult {
     #[doc = "Gets or sets a list of management groups attached to the workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagementGroup>,
 }
 impl azure_core::Continuable for WorkspaceListManagementGroupsResult {
@@ -2341,7 +2451,11 @@ impl WorkspaceListManagementGroupsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "A list of workspaces."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
 }
 impl azure_core::Continuable for WorkspaceListResult {
@@ -2359,7 +2473,11 @@ impl WorkspaceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListUsagesResult {
     #[doc = "Gets or sets a list of usage metrics for a workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UsageMetric>,
 }
 impl azure_core::Continuable for WorkspaceListUsagesResult {
@@ -2424,7 +2542,12 @@ pub struct WorkspaceProperties {
     #[serde(rename = "forceCmkForQuery", default, skip_serializing_if = "Option::is_none")]
     pub force_cmk_for_query: Option<bool>,
     #[doc = "List of linked private link scope resources."]
-    #[serde(rename = "privateLinkScopedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateLinkScopedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_link_scoped_resources: Vec<PrivateLinkScopedResource>,
     #[doc = "Workspace features."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/operationsmanagement/src/package_2015_11_preview/models.rs b/services/mgmt/operationsmanagement/src/package_2015_11_preview/models.rs
index f5cf1ff333..a9bd6309af 100644
--- a/services/mgmt/operationsmanagement/src/package_2015_11_preview/models.rs
+++ b/services/mgmt/operationsmanagement/src/package_2015_11_preview/models.rs
@@ -88,7 +88,11 @@ impl ManagementAssociationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagementAssociationPropertiesList {
     #[doc = "List of Management Association properties within the subscription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagementAssociation>,
 }
 impl ManagementAssociationPropertiesList {
@@ -152,7 +156,11 @@ impl ManagementConfigurationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagementConfigurationPropertiesList {
     #[doc = "List of Management Configuration properties within the subscription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagementConfiguration>,
 }
 impl ManagementConfigurationPropertiesList {
@@ -200,7 +208,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of solution operations supported by the OperationsManagement resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -287,10 +299,20 @@ pub struct SolutionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "The azure resources that will be contained within the solutions. They will be locked and gets deleted automatically when the solution is deleted."]
-    #[serde(rename = "containedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contained_resources: Vec<String>,
     #[doc = "The resources that will be referenced from this solution. Deleting any of those solution out of band will break the solution."]
-    #[serde(rename = "referencedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "referencedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub referenced_resources: Vec<String>,
 }
 impl SolutionProperties {
@@ -307,7 +329,11 @@ impl SolutionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SolutionPropertiesList {
     #[doc = "List of solution properties within the subscription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Solution>,
 }
 impl SolutionPropertiesList {
diff --git a/services/mgmt/orbital/src/package_2021_04_04_preview/models.rs b/services/mgmt/orbital/src/package_2021_04_04_preview/models.rs
index a494f87f03..8f2bca0d6e 100644
--- a/services/mgmt/orbital/src/package_2021_04_04_preview/models.rs
+++ b/services/mgmt/orbital/src/package_2021_04_04_preview/models.rs
@@ -25,7 +25,11 @@ impl AvailableContacts {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableContactsListResult {
     #[doc = "A list of available contacts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableContacts>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -64,7 +68,11 @@ impl AvailableGroundStation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableGroundStationListResult {
     #[doc = "A list of ground station resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableGroundStation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -142,7 +150,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -207,7 +219,11 @@ impl ContactInstanceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContactListResult {
     #[doc = "A list of contact resources in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Contact>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -439,7 +455,11 @@ impl ContactProfileLinkChannel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContactProfileListResult {
     #[doc = "A list of contact profile resources in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContactProfile>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -786,7 +806,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -839,7 +863,11 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceIdListResult {
     #[doc = "A list of Azure Resource IDs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<serde_json::Value>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1006,7 +1034,11 @@ pub mod spacecraft_link {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SpacecraftListResult {
     #[doc = "A list of spacecraft resources in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Spacecraft>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1045,7 +1077,11 @@ pub struct SpacecraftsProperties {
     #[serde(rename = "tleLine2", default, skip_serializing_if = "Option::is_none")]
     pub tle_line2: Option<String>,
     #[doc = "Links of the Spacecraft"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<SpacecraftLink>,
 }
 impl SpacecraftsProperties {
diff --git a/services/mgmt/orbital/src/package_2022_03_01/models.rs b/services/mgmt/orbital/src/package_2022_03_01/models.rs
index 9cad1cdf3a..f05d664754 100644
--- a/services/mgmt/orbital/src/package_2022_03_01/models.rs
+++ b/services/mgmt/orbital/src/package_2022_03_01/models.rs
@@ -40,7 +40,11 @@ impl AvailableContacts {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableContactsListResult {
     #[doc = "A list of available contacts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableContacts>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -85,7 +89,11 @@ impl AvailableGroundStation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableGroundStationListResult {
     #[doc = "A list of ground station resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableGroundStation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -238,7 +246,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -303,7 +315,11 @@ impl ContactInstanceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContactListResult {
     #[doc = "A list of contact resources in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Contact>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -539,7 +555,11 @@ impl ContactProfileLinkChannel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ContactProfileListResult {
     #[doc = "A list of contact profile resources in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ContactProfile>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -758,7 +778,12 @@ pub mod contacts_properties {
         #[serde(rename = "destinationIp", default, skip_serializing_if = "Option::is_none")]
         pub destination_ip: Option<String>,
         #[doc = "List of Source IP"]
-        #[serde(rename = "sourceIps", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "sourceIps",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub source_ips: Vec<String>,
     }
     impl AntennaConfiguration {
@@ -963,7 +988,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1117,7 +1146,11 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceIdListResult {
     #[doc = "A list of Azure Resource IDs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<serde_json::Value>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1177,7 +1210,11 @@ pub struct SpacecraftLink {
     #[doc = "Polarization. e.g. (RHCP, LHCP)."]
     pub polarization: spacecraft_link::Polarization,
     #[doc = "Authorized Ground Stations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<AuthorizedGroundstation>,
 }
 impl SpacecraftLink {
@@ -1289,7 +1326,11 @@ pub mod spacecraft_link {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SpacecraftListResult {
     #[doc = "A list of spacecraft resources in a resource group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Spacecraft>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1325,7 +1366,11 @@ pub struct SpacecraftsProperties {
     #[serde(rename = "tleLine2", default, skip_serializing_if = "Option::is_none")]
     pub tle_line2: Option<String>,
     #[doc = "Immutable list of Spacecraft links."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<SpacecraftLink>,
 }
 impl SpacecraftsProperties {
diff --git a/services/mgmt/peering/src/package_2020_10_01/models.rs b/services/mgmt/peering/src/package_2020_10_01/models.rs
index 6986ed9928..9aed6e05ff 100644
--- a/services/mgmt/peering/src/package_2020_10_01/models.rs
+++ b/services/mgmt/peering/src/package_2020_10_01/models.rs
@@ -176,7 +176,11 @@ impl CdnPeeringPrefix {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CdnPeeringPrefixListResult {
     #[doc = "The list of CDN peering prefixes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CdnPeeringPrefix>,
     #[doc = "The link to fetch the next page of CDN peering prefixes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -680,7 +684,11 @@ impl OperationDisplayInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of peering API operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link to fetch the next page of peering API operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -715,7 +723,11 @@ impl PeerAsn {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeerAsnListResult {
     #[doc = "The list of peer ASNs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeerAsn>,
     #[doc = "The link to fetch the next page of peer ASNs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -739,7 +751,12 @@ pub struct PeerAsnProperties {
     #[serde(rename = "peerAsn", default, skip_serializing_if = "Option::is_none")]
     pub peer_asn: Option<i32>,
     #[doc = "The contact details of the peer."]
-    #[serde(rename = "peerContactDetail", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peerContactDetail",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peer_contact_detail: Vec<ContactDetail>,
     #[doc = "The name of the peer."]
     #[serde(rename = "peerName", default, skip_serializing_if = "Option::is_none")]
@@ -889,7 +906,11 @@ impl PeeringBandwidthOffer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringListResult {
     #[doc = "The list of peerings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Peering>,
     #[doc = "The link to fetch the next page of peerings."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -967,7 +988,11 @@ pub mod peering_location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringLocationListResult {
     #[doc = "The list of peering locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringLocation>,
     #[doc = "The link to fetch the next page of peering locations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1012,10 +1037,20 @@ impl PeeringLocationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringLocationPropertiesDirect {
     #[doc = "The list of direct peering facilities at the peering location."]
-    #[serde(rename = "peeringFacilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeringFacilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peering_facilities: Vec<DirectPeeringFacility>,
     #[doc = "The list of bandwidth offers available at the peering location."]
-    #[serde(rename = "bandwidthOffers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bandwidthOffers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bandwidth_offers: Vec<PeeringBandwidthOffer>,
 }
 impl PeeringLocationPropertiesDirect {
@@ -1027,7 +1062,12 @@ impl PeeringLocationPropertiesDirect {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringLocationPropertiesExchange {
     #[doc = "The list of exchange peering facilities at the peering location."]
-    #[serde(rename = "peeringFacilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeringFacilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peering_facilities: Vec<ExchangePeeringFacility>,
 }
 impl PeeringLocationPropertiesExchange {
@@ -1104,7 +1144,11 @@ pub mod peering_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringPropertiesDirect {
     #[doc = "The set of connections that constitute a direct peering."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connections: Vec<DirectConnection>,
     #[doc = "The flag that indicates whether or not the peering is used for peering service."]
     #[serde(rename = "useForPeeringService", default, skip_serializing_if = "Option::is_none")]
@@ -1173,7 +1217,11 @@ pub mod peering_properties_direct {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringPropertiesExchange {
     #[doc = "The set of connections that constitute an exchange peering."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connections: Vec<ExchangeConnection>,
     #[doc = "The sub resource."]
     #[serde(rename = "peerAsn", default, skip_serializing_if = "Option::is_none")]
@@ -1218,7 +1266,11 @@ impl PeeringReceivedRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringReceivedRouteListResult {
     #[doc = "The list of received routes for the peering."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringReceivedRoute>,
     #[doc = "The link to fetch the next page of received routes for the peering."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1253,7 +1305,11 @@ impl PeeringRegisteredAsn {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringRegisteredAsnListResult {
     #[doc = "The list of peering registered ASNs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringRegisteredAsn>,
     #[doc = "The link to fetch the next page of peering registered ASNs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1350,7 +1406,11 @@ impl PeeringRegisteredPrefix {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringRegisteredPrefixListResult {
     #[doc = "The list of peering registered prefixes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringRegisteredPrefix>,
     #[doc = "The link to fetch the next page of peering registered prefixes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1525,7 +1585,11 @@ impl PeeringServiceCountry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceCountryListResult {
     #[doc = "The list of peering service countries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServiceCountry>,
     #[doc = "The link to fetch the next page of peering service countries."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1546,7 +1610,11 @@ impl PeeringServiceCountryListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceListResult {
     #[doc = "The list of peering services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringService>,
     #[doc = "The link to fetch the next page of peering services."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1581,7 +1649,11 @@ impl PeeringServiceLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceLocationListResult {
     #[doc = "The list of peering service locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServiceLocation>,
     #[doc = "The link to fetch the next page of peering service locations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1658,7 +1730,11 @@ impl PeeringServicePrefixEvent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServicePrefixListResult {
     #[doc = "The list of peering service prefixes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServicePrefix>,
     #[doc = "The link to fetch the next page of peering service prefixes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1691,7 +1767,11 @@ pub struct PeeringServicePrefixProperties {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "The list of events for peering service prefix"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<PeeringServicePrefixEvent>,
     #[doc = "The peering service prefix key"]
     #[serde(rename = "peeringServicePrefixKey", default, skip_serializing_if = "Option::is_none")]
@@ -1915,7 +1995,11 @@ impl PeeringServiceProvider {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceProviderListResult {
     #[doc = "The list of peering service providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServiceProvider>,
     #[doc = "The link to fetch the next page of peering service providers."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/peering/src/package_2021_01_01/models.rs b/services/mgmt/peering/src/package_2021_01_01/models.rs
index 1a902ff1ff..1fc10c0fee 100644
--- a/services/mgmt/peering/src/package_2021_01_01/models.rs
+++ b/services/mgmt/peering/src/package_2021_01_01/models.rs
@@ -176,7 +176,11 @@ impl CdnPeeringPrefix {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CdnPeeringPrefixListResult {
     #[doc = "The list of CDN peering prefixes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CdnPeeringPrefix>,
     #[doc = "The link to fetch the next page of CDN peering prefixes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -682,7 +686,11 @@ impl OperationDisplayInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of peering API operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link to fetch the next page of peering API operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -717,7 +725,11 @@ impl PeerAsn {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeerAsnListResult {
     #[doc = "The list of peer ASNs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeerAsn>,
     #[doc = "The link to fetch the next page of peer ASNs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -741,7 +753,12 @@ pub struct PeerAsnProperties {
     #[serde(rename = "peerAsn", default, skip_serializing_if = "Option::is_none")]
     pub peer_asn: Option<i32>,
     #[doc = "The contact details of the peer."]
-    #[serde(rename = "peerContactDetail", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peerContactDetail",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peer_contact_detail: Vec<ContactDetail>,
     #[doc = "The name of the peer."]
     #[serde(rename = "peerName", default, skip_serializing_if = "Option::is_none")]
@@ -891,7 +908,11 @@ impl PeeringBandwidthOffer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringListResult {
     #[doc = "The list of peerings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Peering>,
     #[doc = "The link to fetch the next page of peerings."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -969,7 +990,11 @@ pub mod peering_location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringLocationListResult {
     #[doc = "The list of peering locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringLocation>,
     #[doc = "The link to fetch the next page of peering locations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1014,10 +1039,20 @@ impl PeeringLocationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringLocationPropertiesDirect {
     #[doc = "The list of direct peering facilities at the peering location."]
-    #[serde(rename = "peeringFacilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeringFacilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peering_facilities: Vec<DirectPeeringFacility>,
     #[doc = "The list of bandwidth offers available at the peering location."]
-    #[serde(rename = "bandwidthOffers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bandwidthOffers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bandwidth_offers: Vec<PeeringBandwidthOffer>,
 }
 impl PeeringLocationPropertiesDirect {
@@ -1029,7 +1064,12 @@ impl PeeringLocationPropertiesDirect {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringLocationPropertiesExchange {
     #[doc = "The list of exchange peering facilities at the peering location."]
-    #[serde(rename = "peeringFacilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeringFacilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peering_facilities: Vec<ExchangePeeringFacility>,
 }
 impl PeeringLocationPropertiesExchange {
@@ -1106,7 +1146,11 @@ pub mod peering_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringPropertiesDirect {
     #[doc = "The set of connections that constitute a direct peering."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connections: Vec<DirectConnection>,
     #[doc = "The flag that indicates whether or not the peering is used for peering service."]
     #[serde(rename = "useForPeeringService", default, skip_serializing_if = "Option::is_none")]
@@ -1177,7 +1221,11 @@ pub mod peering_properties_direct {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringPropertiesExchange {
     #[doc = "The set of connections that constitute an exchange peering."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connections: Vec<ExchangeConnection>,
     #[doc = "The sub resource."]
     #[serde(rename = "peerAsn", default, skip_serializing_if = "Option::is_none")]
@@ -1222,7 +1270,11 @@ impl PeeringReceivedRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringReceivedRouteListResult {
     #[doc = "The list of received routes for the peering."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringReceivedRoute>,
     #[doc = "The link to fetch the next page of received routes for the peering."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1257,7 +1309,11 @@ impl PeeringRegisteredAsn {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringRegisteredAsnListResult {
     #[doc = "The list of peering registered ASNs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringRegisteredAsn>,
     #[doc = "The link to fetch the next page of peering registered ASNs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1354,7 +1410,11 @@ impl PeeringRegisteredPrefix {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringRegisteredPrefixListResult {
     #[doc = "The list of peering registered prefixes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringRegisteredPrefix>,
     #[doc = "The link to fetch the next page of peering registered prefixes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1529,7 +1589,11 @@ impl PeeringServiceCountry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceCountryListResult {
     #[doc = "The list of peering service countries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServiceCountry>,
     #[doc = "The link to fetch the next page of peering service countries."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1550,7 +1614,11 @@ impl PeeringServiceCountryListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceListResult {
     #[doc = "The list of peering services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringService>,
     #[doc = "The link to fetch the next page of peering services."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1585,7 +1653,11 @@ impl PeeringServiceLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceLocationListResult {
     #[doc = "The list of peering service locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServiceLocation>,
     #[doc = "The link to fetch the next page of peering service locations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1662,7 +1734,11 @@ impl PeeringServicePrefixEvent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServicePrefixListResult {
     #[doc = "The list of peering service prefixes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServicePrefix>,
     #[doc = "The link to fetch the next page of peering service prefixes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1695,7 +1771,11 @@ pub struct PeeringServicePrefixProperties {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "The list of events for peering service prefix"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<PeeringServicePrefixEvent>,
     #[doc = "The peering service prefix key"]
     #[serde(rename = "peeringServicePrefixKey", default, skip_serializing_if = "Option::is_none")]
@@ -1925,7 +2005,11 @@ impl PeeringServiceProvider {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceProviderListResult {
     #[doc = "The list of peering service providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServiceProvider>,
     #[doc = "The link to fetch the next page of peering service providers."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1949,7 +2033,12 @@ pub struct PeeringServiceProviderProperties {
     #[serde(rename = "serviceProviderName", default, skip_serializing_if = "Option::is_none")]
     pub service_provider_name: Option<String>,
     #[doc = "The list of locations at which the service provider peers with Microsoft."]
-    #[serde(rename = "peeringLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeringLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peering_locations: Vec<String>,
 }
 impl PeeringServiceProviderProperties {
diff --git a/services/mgmt/peering/src/package_2021_06_01/models.rs b/services/mgmt/peering/src/package_2021_06_01/models.rs
index 69209b06d7..7957149cee 100644
--- a/services/mgmt/peering/src/package_2021_06_01/models.rs
+++ b/services/mgmt/peering/src/package_2021_06_01/models.rs
@@ -176,7 +176,11 @@ impl CdnPeeringPrefix {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CdnPeeringPrefixListResult {
     #[doc = "The list of CDN peering prefixes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CdnPeeringPrefix>,
     #[doc = "The link to fetch the next page of CDN peering prefixes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -250,7 +254,11 @@ impl ConnectionMonitorTest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionMonitorTestListResult {
     #[doc = "The list of [T]."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectionMonitorTest>,
     #[doc = "The link to fetch the next page of [T]."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -286,7 +294,11 @@ pub struct ConnectionMonitorTestProperties {
     #[serde(rename = "isTestSuccessful", default, skip_serializing_if = "Option::is_none")]
     pub is_test_successful: Option<bool>,
     #[doc = "The path representing the Connection Monitor test."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path: Vec<String>,
     #[doc = "The provisioning state of the resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -758,7 +770,12 @@ pub struct LogAnalyticsWorkspaceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub key: Option<String>,
     #[doc = "The list of connected agents."]
-    #[serde(rename = "connectedAgents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectedAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connected_agents: Vec<String>,
 }
 impl LogAnalyticsWorkspaceProperties {
@@ -857,10 +874,19 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported time grain types for the metric."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Dimensions of the metric."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
 }
 impl MetricSpecification {
@@ -914,7 +940,11 @@ impl OperationDisplayInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of peering API operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link to fetch the next page of peering API operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -961,7 +991,11 @@ impl PeerAsn {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeerAsnListResult {
     #[doc = "The list of peer ASNs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeerAsn>,
     #[doc = "The link to fetch the next page of peer ASNs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -985,7 +1019,12 @@ pub struct PeerAsnProperties {
     #[serde(rename = "peerAsn", default, skip_serializing_if = "Option::is_none")]
     pub peer_asn: Option<i32>,
     #[doc = "The contact details of the peer."]
-    #[serde(rename = "peerContactDetail", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peerContactDetail",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peer_contact_detail: Vec<ContactDetail>,
     #[doc = "The name of the peer."]
     #[serde(rename = "peerName", default, skip_serializing_if = "Option::is_none")]
@@ -1135,7 +1174,11 @@ impl PeeringBandwidthOffer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringListResult {
     #[doc = "The list of peerings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Peering>,
     #[doc = "The link to fetch the next page of peerings."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1213,7 +1256,11 @@ pub mod peering_location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringLocationListResult {
     #[doc = "The list of peering locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringLocation>,
     #[doc = "The link to fetch the next page of peering locations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1258,10 +1305,20 @@ impl PeeringLocationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringLocationPropertiesDirect {
     #[doc = "The list of direct peering facilities at the peering location."]
-    #[serde(rename = "peeringFacilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeringFacilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peering_facilities: Vec<DirectPeeringFacility>,
     #[doc = "The list of bandwidth offers available at the peering location."]
-    #[serde(rename = "bandwidthOffers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bandwidthOffers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bandwidth_offers: Vec<PeeringBandwidthOffer>,
 }
 impl PeeringLocationPropertiesDirect {
@@ -1273,7 +1330,12 @@ impl PeeringLocationPropertiesDirect {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringLocationPropertiesExchange {
     #[doc = "The list of exchange peering facilities at the peering location."]
-    #[serde(rename = "peeringFacilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeringFacilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peering_facilities: Vec<ExchangePeeringFacility>,
 }
 impl PeeringLocationPropertiesExchange {
@@ -1350,7 +1412,11 @@ pub mod peering_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringPropertiesDirect {
     #[doc = "The set of connections that constitute a direct peering."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connections: Vec<DirectConnection>,
     #[doc = "The flag that indicates whether or not the peering is used for peering service."]
     #[serde(rename = "useForPeeringService", default, skip_serializing_if = "Option::is_none")]
@@ -1421,7 +1487,11 @@ pub mod peering_properties_direct {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringPropertiesExchange {
     #[doc = "The set of connections that constitute an exchange peering."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connections: Vec<ExchangeConnection>,
     #[doc = "The sub resource."]
     #[serde(rename = "peerAsn", default, skip_serializing_if = "Option::is_none")]
@@ -1466,7 +1536,11 @@ impl PeeringReceivedRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringReceivedRouteListResult {
     #[doc = "The list of received routes for the peering."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringReceivedRoute>,
     #[doc = "The link to fetch the next page of received routes for the peering."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1501,7 +1575,11 @@ impl PeeringRegisteredAsn {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringRegisteredAsnListResult {
     #[doc = "The list of peering registered ASNs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringRegisteredAsn>,
     #[doc = "The link to fetch the next page of peering registered ASNs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1598,7 +1676,11 @@ impl PeeringRegisteredPrefix {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringRegisteredPrefixListResult {
     #[doc = "The list of peering registered prefixes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringRegisteredPrefix>,
     #[doc = "The link to fetch the next page of peering registered prefixes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1773,7 +1855,11 @@ impl PeeringServiceCountry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceCountryListResult {
     #[doc = "The list of peering service countries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServiceCountry>,
     #[doc = "The link to fetch the next page of peering service countries."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1794,7 +1880,11 @@ impl PeeringServiceCountryListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceListResult {
     #[doc = "The list of peering services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringService>,
     #[doc = "The link to fetch the next page of peering services."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1829,7 +1919,11 @@ impl PeeringServiceLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceLocationListResult {
     #[doc = "The list of peering service locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServiceLocation>,
     #[doc = "The link to fetch the next page of peering service locations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1906,7 +2000,11 @@ impl PeeringServicePrefixEvent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServicePrefixListResult {
     #[doc = "The list of peering service prefixes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServicePrefix>,
     #[doc = "The link to fetch the next page of peering service prefixes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1939,7 +2037,11 @@ pub struct PeeringServicePrefixProperties {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "The list of events for peering service prefix"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<PeeringServicePrefixEvent>,
     #[doc = "The peering service prefix key"]
     #[serde(rename = "peeringServicePrefixKey", default, skip_serializing_if = "Option::is_none")]
@@ -2172,7 +2274,11 @@ impl PeeringServiceProvider {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceProviderListResult {
     #[doc = "The list of peering service providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServiceProvider>,
     #[doc = "The link to fetch the next page of peering service providers."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2196,7 +2302,12 @@ pub struct PeeringServiceProviderProperties {
     #[serde(rename = "serviceProviderName", default, skip_serializing_if = "Option::is_none")]
     pub service_provider_name: Option<String>,
     #[doc = "The list of locations at which the service provider peers with Microsoft."]
-    #[serde(rename = "peeringLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeringLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peering_locations: Vec<String>,
 }
 impl PeeringServiceProviderProperties {
@@ -2387,7 +2498,12 @@ impl ResourceTags {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Metrics for Azure Monitoring."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
diff --git a/services/mgmt/peering/src/package_2022_01_01/models.rs b/services/mgmt/peering/src/package_2022_01_01/models.rs
index 4a1d064175..1ce41d49c4 100644
--- a/services/mgmt/peering/src/package_2022_01_01/models.rs
+++ b/services/mgmt/peering/src/package_2022_01_01/models.rs
@@ -176,7 +176,11 @@ impl CdnPeeringPrefix {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CdnPeeringPrefixListResult {
     #[doc = "The list of CDN peering prefixes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CdnPeeringPrefix>,
     #[doc = "The link to fetch the next page of CDN peering prefixes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -250,7 +254,11 @@ impl ConnectionMonitorTest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionMonitorTestListResult {
     #[doc = "The list of [T]."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectionMonitorTest>,
     #[doc = "The link to fetch the next page of [T]."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -286,7 +294,11 @@ pub struct ConnectionMonitorTestProperties {
     #[serde(rename = "isTestSuccessful", default, skip_serializing_if = "Option::is_none")]
     pub is_test_successful: Option<bool>,
     #[doc = "The path representing the Connection Monitor test."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path: Vec<String>,
     #[doc = "The provisioning state of the resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -760,7 +772,12 @@ pub struct LogAnalyticsWorkspaceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub key: Option<String>,
     #[doc = "The list of connected agents."]
-    #[serde(rename = "connectedAgents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectedAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connected_agents: Vec<String>,
 }
 impl LogAnalyticsWorkspaceProperties {
@@ -859,10 +876,19 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported time grain types for the metric."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Dimensions of the metric."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
 }
 impl MetricSpecification {
@@ -916,7 +942,11 @@ impl OperationDisplayInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of peering API operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link to fetch the next page of peering API operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -963,7 +993,11 @@ impl PeerAsn {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeerAsnListResult {
     #[doc = "The list of peer ASNs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeerAsn>,
     #[doc = "The link to fetch the next page of peer ASNs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -987,7 +1021,12 @@ pub struct PeerAsnProperties {
     #[serde(rename = "peerAsn", default, skip_serializing_if = "Option::is_none")]
     pub peer_asn: Option<i32>,
     #[doc = "The contact details of the peer."]
-    #[serde(rename = "peerContactDetail", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peerContactDetail",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peer_contact_detail: Vec<ContactDetail>,
     #[doc = "The name of the peer."]
     #[serde(rename = "peerName", default, skip_serializing_if = "Option::is_none")]
@@ -1137,7 +1176,11 @@ impl PeeringBandwidthOffer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringListResult {
     #[doc = "The list of peerings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Peering>,
     #[doc = "The link to fetch the next page of peerings."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1215,7 +1258,11 @@ pub mod peering_location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringLocationListResult {
     #[doc = "The list of peering locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringLocation>,
     #[doc = "The link to fetch the next page of peering locations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1260,10 +1307,20 @@ impl PeeringLocationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringLocationPropertiesDirect {
     #[doc = "The list of direct peering facilities at the peering location."]
-    #[serde(rename = "peeringFacilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeringFacilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peering_facilities: Vec<DirectPeeringFacility>,
     #[doc = "The list of bandwidth offers available at the peering location."]
-    #[serde(rename = "bandwidthOffers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bandwidthOffers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bandwidth_offers: Vec<PeeringBandwidthOffer>,
 }
 impl PeeringLocationPropertiesDirect {
@@ -1275,7 +1332,12 @@ impl PeeringLocationPropertiesDirect {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringLocationPropertiesExchange {
     #[doc = "The list of exchange peering facilities at the peering location."]
-    #[serde(rename = "peeringFacilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeringFacilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peering_facilities: Vec<ExchangePeeringFacility>,
 }
 impl PeeringLocationPropertiesExchange {
@@ -1352,7 +1414,11 @@ pub mod peering_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringPropertiesDirect {
     #[doc = "The set of connections that constitute a direct peering."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connections: Vec<DirectConnection>,
     #[doc = "The flag that indicates whether or not the peering is used for peering service."]
     #[serde(rename = "useForPeeringService", default, skip_serializing_if = "Option::is_none")]
@@ -1425,7 +1491,11 @@ pub mod peering_properties_direct {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringPropertiesExchange {
     #[doc = "The set of connections that constitute an exchange peering."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connections: Vec<ExchangeConnection>,
     #[doc = "The sub resource."]
     #[serde(rename = "peerAsn", default, skip_serializing_if = "Option::is_none")]
@@ -1470,7 +1540,11 @@ impl PeeringReceivedRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringReceivedRouteListResult {
     #[doc = "The list of received routes for the peering."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringReceivedRoute>,
     #[doc = "The link to fetch the next page of received routes for the peering."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1505,7 +1579,11 @@ impl PeeringRegisteredAsn {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringRegisteredAsnListResult {
     #[doc = "The list of peering registered ASNs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringRegisteredAsn>,
     #[doc = "The link to fetch the next page of peering registered ASNs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1602,7 +1680,11 @@ impl PeeringRegisteredPrefix {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringRegisteredPrefixListResult {
     #[doc = "The list of peering registered prefixes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringRegisteredPrefix>,
     #[doc = "The link to fetch the next page of peering registered prefixes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1777,7 +1859,11 @@ impl PeeringServiceCountry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceCountryListResult {
     #[doc = "The list of peering service countries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServiceCountry>,
     #[doc = "The link to fetch the next page of peering service countries."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1798,7 +1884,11 @@ impl PeeringServiceCountryListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceListResult {
     #[doc = "The list of peering services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringService>,
     #[doc = "The link to fetch the next page of peering services."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1833,7 +1923,11 @@ impl PeeringServiceLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceLocationListResult {
     #[doc = "The list of peering service locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServiceLocation>,
     #[doc = "The link to fetch the next page of peering service locations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1910,7 +2004,11 @@ impl PeeringServicePrefixEvent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServicePrefixListResult {
     #[doc = "The list of peering service prefixes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServicePrefix>,
     #[doc = "The link to fetch the next page of peering service prefixes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1943,7 +2041,11 @@ pub struct PeeringServicePrefixProperties {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "The list of events for peering service prefix"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<PeeringServicePrefixEvent>,
     #[doc = "The peering service prefix key"]
     #[serde(rename = "peeringServicePrefixKey", default, skip_serializing_if = "Option::is_none")]
@@ -2176,7 +2278,11 @@ impl PeeringServiceProvider {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceProviderListResult {
     #[doc = "The list of peering service providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServiceProvider>,
     #[doc = "The link to fetch the next page of peering service providers."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2200,7 +2306,12 @@ pub struct PeeringServiceProviderProperties {
     #[serde(rename = "serviceProviderName", default, skip_serializing_if = "Option::is_none")]
     pub service_provider_name: Option<String>,
     #[doc = "The list of locations at which the service provider peers with Microsoft."]
-    #[serde(rename = "peeringLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeringLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peering_locations: Vec<String>,
 }
 impl PeeringServiceProviderProperties {
@@ -2391,7 +2502,12 @@ impl ResourceTags {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Metrics for Azure Monitoring."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
diff --git a/services/mgmt/peering/src/package_2022_06_01/models.rs b/services/mgmt/peering/src/package_2022_06_01/models.rs
index d0e479e380..78d94777b5 100644
--- a/services/mgmt/peering/src/package_2022_06_01/models.rs
+++ b/services/mgmt/peering/src/package_2022_06_01/models.rs
@@ -176,7 +176,11 @@ impl CdnPeeringPrefix {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CdnPeeringPrefixListResult {
     #[doc = "The list of CDN peering prefixes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CdnPeeringPrefix>,
     #[doc = "The link to fetch the next page of CDN peering prefixes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -250,7 +254,11 @@ impl ConnectionMonitorTest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionMonitorTestListResult {
     #[doc = "The list of [T]."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ConnectionMonitorTest>,
     #[doc = "The link to fetch the next page of [T]."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -286,7 +294,11 @@ pub struct ConnectionMonitorTestProperties {
     #[serde(rename = "isTestSuccessful", default, skip_serializing_if = "Option::is_none")]
     pub is_test_successful: Option<bool>,
     #[doc = "The path representing the Connection Monitor test."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path: Vec<String>,
     #[doc = "The provisioning state of the resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -768,7 +780,12 @@ pub struct LogAnalyticsWorkspaceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub key: Option<String>,
     #[doc = "The list of connected agents."]
-    #[serde(rename = "connectedAgents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectedAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connected_agents: Vec<String>,
 }
 impl LogAnalyticsWorkspaceProperties {
@@ -867,10 +884,19 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported time grain types for the metric."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Dimensions of the metric."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
 }
 impl MetricSpecification {
@@ -924,7 +950,11 @@ impl OperationDisplayInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of peering API operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link to fetch the next page of peering API operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -971,7 +1001,11 @@ impl PeerAsn {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeerAsnListResult {
     #[doc = "The list of peer ASNs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeerAsn>,
     #[doc = "The link to fetch the next page of peer ASNs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -995,7 +1029,12 @@ pub struct PeerAsnProperties {
     #[serde(rename = "peerAsn", default, skip_serializing_if = "Option::is_none")]
     pub peer_asn: Option<i32>,
     #[doc = "The contact details of the peer."]
-    #[serde(rename = "peerContactDetail", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peerContactDetail",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peer_contact_detail: Vec<ContactDetail>,
     #[doc = "The name of the peer."]
     #[serde(rename = "peerName", default, skip_serializing_if = "Option::is_none")]
@@ -1145,7 +1184,11 @@ impl PeeringBandwidthOffer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringListResult {
     #[doc = "The list of peerings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Peering>,
     #[doc = "The link to fetch the next page of peerings."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1223,7 +1266,11 @@ pub mod peering_location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringLocationListResult {
     #[doc = "The list of peering locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringLocation>,
     #[doc = "The link to fetch the next page of peering locations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1268,10 +1315,20 @@ impl PeeringLocationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringLocationPropertiesDirect {
     #[doc = "The list of direct peering facilities at the peering location."]
-    #[serde(rename = "peeringFacilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeringFacilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peering_facilities: Vec<DirectPeeringFacility>,
     #[doc = "The list of bandwidth offers available at the peering location."]
-    #[serde(rename = "bandwidthOffers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "bandwidthOffers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub bandwidth_offers: Vec<PeeringBandwidthOffer>,
 }
 impl PeeringLocationPropertiesDirect {
@@ -1283,7 +1340,12 @@ impl PeeringLocationPropertiesDirect {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringLocationPropertiesExchange {
     #[doc = "The list of exchange peering facilities at the peering location."]
-    #[serde(rename = "peeringFacilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeringFacilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peering_facilities: Vec<ExchangePeeringFacility>,
 }
 impl PeeringLocationPropertiesExchange {
@@ -1360,7 +1422,11 @@ pub mod peering_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringPropertiesDirect {
     #[doc = "The set of connections that constitute a direct peering."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connections: Vec<DirectConnection>,
     #[doc = "The flag that indicates whether or not the peering is used for peering service."]
     #[serde(rename = "useForPeeringService", default, skip_serializing_if = "Option::is_none")]
@@ -1433,7 +1499,11 @@ pub mod peering_properties_direct {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringPropertiesExchange {
     #[doc = "The set of connections that constitute an exchange peering."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connections: Vec<ExchangeConnection>,
     #[doc = "The sub resource."]
     #[serde(rename = "peerAsn", default, skip_serializing_if = "Option::is_none")]
@@ -1478,7 +1548,11 @@ impl PeeringReceivedRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringReceivedRouteListResult {
     #[doc = "The list of received routes for the peering."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringReceivedRoute>,
     #[doc = "The link to fetch the next page of received routes for the peering."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1513,7 +1587,11 @@ impl PeeringRegisteredAsn {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringRegisteredAsnListResult {
     #[doc = "The list of peering registered ASNs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringRegisteredAsn>,
     #[doc = "The link to fetch the next page of peering registered ASNs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1610,7 +1688,11 @@ impl PeeringRegisteredPrefix {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringRegisteredPrefixListResult {
     #[doc = "The list of peering registered prefixes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringRegisteredPrefix>,
     #[doc = "The link to fetch the next page of peering registered prefixes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1785,7 +1867,11 @@ impl PeeringServiceCountry {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceCountryListResult {
     #[doc = "The list of peering service countries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServiceCountry>,
     #[doc = "The link to fetch the next page of peering service countries."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1806,7 +1892,11 @@ impl PeeringServiceCountryListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceListResult {
     #[doc = "The list of peering services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringService>,
     #[doc = "The link to fetch the next page of peering services."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1841,7 +1931,11 @@ impl PeeringServiceLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceLocationListResult {
     #[doc = "The list of peering service locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServiceLocation>,
     #[doc = "The link to fetch the next page of peering service locations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1918,7 +2012,11 @@ impl PeeringServicePrefixEvent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServicePrefixListResult {
     #[doc = "The list of peering service prefixes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServicePrefix>,
     #[doc = "The link to fetch the next page of peering service prefixes."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1951,7 +2049,11 @@ pub struct PeeringServicePrefixProperties {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "The list of events for peering service prefix"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<PeeringServicePrefixEvent>,
     #[doc = "The peering service prefix key"]
     #[serde(rename = "peeringServicePrefixKey", default, skip_serializing_if = "Option::is_none")]
@@ -2184,7 +2286,11 @@ impl PeeringServiceProvider {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PeeringServiceProviderListResult {
     #[doc = "The list of peering service providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PeeringServiceProvider>,
     #[doc = "The link to fetch the next page of peering service providers."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2208,7 +2314,12 @@ pub struct PeeringServiceProviderProperties {
     #[serde(rename = "serviceProviderName", default, skip_serializing_if = "Option::is_none")]
     pub service_provider_name: Option<String>,
     #[doc = "The list of locations at which the service provider peers with Microsoft."]
-    #[serde(rename = "peeringLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "peeringLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peering_locations: Vec<String>,
 }
 impl PeeringServiceProviderProperties {
@@ -2399,7 +2510,12 @@ impl ResourceTags {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Metrics for Azure Monitoring."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
diff --git a/services/mgmt/policyinsights/src/package_2020_07/models.rs b/services/mgmt/policyinsights/src/package_2020_07/models.rs
index d85da6f8ec..b605265cc8 100644
--- a/services/mgmt/policyinsights/src/package_2020_07/models.rs
+++ b/services/mgmt/policyinsights/src/package_2020_07/models.rs
@@ -10,7 +10,12 @@ pub struct CheckRestrictionsRequest {
     #[serde(rename = "resourceDetails")]
     pub resource_details: CheckRestrictionsResourceDetails,
     #[doc = "The list of fields and values that should be evaluated for potential restrictions."]
-    #[serde(rename = "pendingFields", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pendingFields",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pending_fields: Vec<PendingField>,
 }
 impl CheckRestrictionsRequest {
@@ -47,7 +52,12 @@ impl CheckRestrictionsResourceDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CheckRestrictionsResult {
     #[doc = "The restrictions that will be placed on various fields in the resource by policy."]
-    #[serde(rename = "fieldRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_restrictions: Vec<FieldRestrictions>,
     #[doc = "Evaluation results for the provided partial resource content."]
     #[serde(rename = "contentEvaluationResult", default, skip_serializing_if = "Option::is_none")]
@@ -64,7 +74,12 @@ pub mod check_restrictions_result {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ContentEvaluationResult {
         #[doc = "Policy evaluation results against the given resource content. This will indicate if the partial content that was provided will be denied as-is."]
-        #[serde(rename = "policyEvaluations", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "policyEvaluations",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub policy_evaluations: Vec<PolicyEvaluationResult>,
     }
     impl ContentEvaluationResult {
@@ -155,10 +170,19 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
     #[doc = "Additional scenario specific error details."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<TypedErrorInfo>,
 }
 impl ErrorDefinition {
@@ -224,7 +248,11 @@ pub struct FieldRestriction {
     #[serde(rename = "defaultValue", default, skip_serializing_if = "Option::is_none")]
     pub default_value: Option<String>,
     #[doc = "The values that policy either requires or denies for the field."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Resource identifiers for a policy."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -284,7 +312,11 @@ pub struct FieldRestrictions {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub field: Option<String>,
     #[doc = "The restrictions placed on that field by policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<FieldRestriction>,
 }
 impl FieldRestrictions {
@@ -354,7 +386,11 @@ pub struct OperationsListResults {
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
     pub odata_count: Option<i32>,
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationsListResults {
@@ -368,7 +404,11 @@ pub struct PendingField {
     #[doc = "The name of the field. This can be a top-level property like 'name' or 'type' or an Azure Policy field alias."]
     pub field: String,
     #[doc = "The list of potential values for the field that should be evaluated against Azure Policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl PendingField {
@@ -389,10 +429,20 @@ pub struct PolicyAssignmentSummary {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub results: Option<SummaryResults>,
     #[doc = "Policy definitions summary."]
-    #[serde(rename = "policyDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definitions: Vec<PolicyDefinitionSummary>,
     #[doc = "Policy definition group summary."]
-    #[serde(rename = "policyGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_groups: Vec<PolicyGroupSummary>,
 }
 impl PolicyAssignmentSummary {
@@ -410,7 +460,12 @@ pub struct PolicyDefinitionSummary {
     #[serde(rename = "policyDefinitionReferenceId", default, skip_serializing_if = "Option::is_none")]
     pub policy_definition_reference_id: Option<String>,
     #[doc = "Policy definition group names."]
-    #[serde(rename = "policyDefinitionGroupNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitionGroupNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definition_group_names: Vec<String>,
     #[doc = "Policy effect, i.e. policy definition action."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -455,7 +510,12 @@ impl PolicyDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyEvaluationDetails {
     #[doc = "Details of the evaluated expressions."]
-    #[serde(rename = "evaluatedExpressions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "evaluatedExpressions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub evaluated_expressions: Vec<ExpressionEvaluationDetails>,
     #[doc = "Evaluation details of IfNotExists effect."]
     #[serde(rename = "ifNotExistsDetails", default, skip_serializing_if = "Option::is_none")]
@@ -578,7 +638,11 @@ pub struct PolicyEvent {
     #[serde(rename = "principalOid", default, skip_serializing_if = "Option::is_none")]
     pub principal_oid: Option<String>,
     #[doc = "Components events records populated only when URL contains $expand=components clause."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub components: Vec<ComponentEventDetails>,
 }
 impl PolicyEvent {
@@ -599,7 +663,11 @@ pub struct PolicyEventsQueryResults {
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
     #[doc = "Query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyEvent>,
 }
 impl azure_core::Continuable for PolicyEventsQueryResults {
@@ -653,7 +721,11 @@ impl PolicyMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyMetadataCollection {
     #[doc = "Array of policy metadata definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SlimPolicyMetadata>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -826,10 +898,19 @@ pub struct PolicyState {
     #[serde(rename = "policyEvaluationDetails", default, skip_serializing_if = "Option::is_none")]
     pub policy_evaluation_details: Option<PolicyEvaluationDetails>,
     #[doc = "Policy definition group names."]
-    #[serde(rename = "policyDefinitionGroupNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitionGroupNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definition_group_names: Vec<String>,
     #[doc = "Components state compliance records populated only when URL contains $expand=components clause."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub components: Vec<ComponentStateDetails>,
     #[doc = "Evaluated policy definition version."]
     #[serde(rename = "policyDefinitionVersion", default, skip_serializing_if = "Option::is_none")]
@@ -859,7 +940,11 @@ pub struct PolicyStatesQueryResults {
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
     #[doc = "Query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyState>,
 }
 impl azure_core::Continuable for PolicyStatesQueryResults {
@@ -901,7 +986,11 @@ impl PolicyTrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyTrackedResourcesQueryResults {
     #[doc = "Query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyTrackedResource>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1027,7 +1116,11 @@ impl RemediationDeploymentSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RemediationDeploymentsListResult {
     #[doc = "Array of deployments for the remediation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RemediationDeployment>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1048,7 +1141,11 @@ impl RemediationDeploymentsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RemediationFilters {
     #[doc = "The resource locations that will be remediated."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl RemediationFilters {
@@ -1060,7 +1157,11 @@ impl RemediationFilters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RemediationListResult {
     #[doc = "Array of remediation definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Remediation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1181,7 +1282,11 @@ pub struct SummarizeResults {
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
     pub odata_count: Option<i32>,
     #[doc = "Summarize action results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Summary>,
 }
 impl SummarizeResults {
@@ -1202,7 +1307,12 @@ pub struct Summary {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub results: Option<SummaryResults>,
     #[doc = "Policy assignments summary."]
-    #[serde(rename = "policyAssignments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyAssignments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_assignments: Vec<PolicyAssignmentSummary>,
 }
 impl Summary {
@@ -1223,13 +1333,28 @@ pub struct SummaryResults {
     #[serde(rename = "nonCompliantPolicies", default, skip_serializing_if = "Option::is_none")]
     pub non_compliant_policies: Option<i32>,
     #[doc = "The resources summary at this level."]
-    #[serde(rename = "resourceDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_details: Vec<ComplianceDetail>,
     #[doc = "The policy artifact summary at this level. For query scope level, it represents policy assignment summary. For policy assignment level, it represents policy definitions summary."]
-    #[serde(rename = "policyDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_details: Vec<ComplianceDetail>,
     #[doc = "The policy definition group summary at this level."]
-    #[serde(rename = "policyGroupDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyGroupDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_group_details: Vec<ComplianceDetail>,
 }
 impl SummaryResults {
diff --git a/services/mgmt/policyinsights/src/package_2020_07_preview/models.rs b/services/mgmt/policyinsights/src/package_2020_07_preview/models.rs
index d85da6f8ec..b605265cc8 100644
--- a/services/mgmt/policyinsights/src/package_2020_07_preview/models.rs
+++ b/services/mgmt/policyinsights/src/package_2020_07_preview/models.rs
@@ -10,7 +10,12 @@ pub struct CheckRestrictionsRequest {
     #[serde(rename = "resourceDetails")]
     pub resource_details: CheckRestrictionsResourceDetails,
     #[doc = "The list of fields and values that should be evaluated for potential restrictions."]
-    #[serde(rename = "pendingFields", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pendingFields",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pending_fields: Vec<PendingField>,
 }
 impl CheckRestrictionsRequest {
@@ -47,7 +52,12 @@ impl CheckRestrictionsResourceDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CheckRestrictionsResult {
     #[doc = "The restrictions that will be placed on various fields in the resource by policy."]
-    #[serde(rename = "fieldRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_restrictions: Vec<FieldRestrictions>,
     #[doc = "Evaluation results for the provided partial resource content."]
     #[serde(rename = "contentEvaluationResult", default, skip_serializing_if = "Option::is_none")]
@@ -64,7 +74,12 @@ pub mod check_restrictions_result {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ContentEvaluationResult {
         #[doc = "Policy evaluation results against the given resource content. This will indicate if the partial content that was provided will be denied as-is."]
-        #[serde(rename = "policyEvaluations", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "policyEvaluations",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub policy_evaluations: Vec<PolicyEvaluationResult>,
     }
     impl ContentEvaluationResult {
@@ -155,10 +170,19 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
     #[doc = "Additional scenario specific error details."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<TypedErrorInfo>,
 }
 impl ErrorDefinition {
@@ -224,7 +248,11 @@ pub struct FieldRestriction {
     #[serde(rename = "defaultValue", default, skip_serializing_if = "Option::is_none")]
     pub default_value: Option<String>,
     #[doc = "The values that policy either requires or denies for the field."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Resource identifiers for a policy."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -284,7 +312,11 @@ pub struct FieldRestrictions {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub field: Option<String>,
     #[doc = "The restrictions placed on that field by policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<FieldRestriction>,
 }
 impl FieldRestrictions {
@@ -354,7 +386,11 @@ pub struct OperationsListResults {
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
     pub odata_count: Option<i32>,
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationsListResults {
@@ -368,7 +404,11 @@ pub struct PendingField {
     #[doc = "The name of the field. This can be a top-level property like 'name' or 'type' or an Azure Policy field alias."]
     pub field: String,
     #[doc = "The list of potential values for the field that should be evaluated against Azure Policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl PendingField {
@@ -389,10 +429,20 @@ pub struct PolicyAssignmentSummary {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub results: Option<SummaryResults>,
     #[doc = "Policy definitions summary."]
-    #[serde(rename = "policyDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definitions: Vec<PolicyDefinitionSummary>,
     #[doc = "Policy definition group summary."]
-    #[serde(rename = "policyGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_groups: Vec<PolicyGroupSummary>,
 }
 impl PolicyAssignmentSummary {
@@ -410,7 +460,12 @@ pub struct PolicyDefinitionSummary {
     #[serde(rename = "policyDefinitionReferenceId", default, skip_serializing_if = "Option::is_none")]
     pub policy_definition_reference_id: Option<String>,
     #[doc = "Policy definition group names."]
-    #[serde(rename = "policyDefinitionGroupNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitionGroupNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definition_group_names: Vec<String>,
     #[doc = "Policy effect, i.e. policy definition action."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -455,7 +510,12 @@ impl PolicyDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyEvaluationDetails {
     #[doc = "Details of the evaluated expressions."]
-    #[serde(rename = "evaluatedExpressions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "evaluatedExpressions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub evaluated_expressions: Vec<ExpressionEvaluationDetails>,
     #[doc = "Evaluation details of IfNotExists effect."]
     #[serde(rename = "ifNotExistsDetails", default, skip_serializing_if = "Option::is_none")]
@@ -578,7 +638,11 @@ pub struct PolicyEvent {
     #[serde(rename = "principalOid", default, skip_serializing_if = "Option::is_none")]
     pub principal_oid: Option<String>,
     #[doc = "Components events records populated only when URL contains $expand=components clause."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub components: Vec<ComponentEventDetails>,
 }
 impl PolicyEvent {
@@ -599,7 +663,11 @@ pub struct PolicyEventsQueryResults {
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
     #[doc = "Query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyEvent>,
 }
 impl azure_core::Continuable for PolicyEventsQueryResults {
@@ -653,7 +721,11 @@ impl PolicyMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyMetadataCollection {
     #[doc = "Array of policy metadata definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SlimPolicyMetadata>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -826,10 +898,19 @@ pub struct PolicyState {
     #[serde(rename = "policyEvaluationDetails", default, skip_serializing_if = "Option::is_none")]
     pub policy_evaluation_details: Option<PolicyEvaluationDetails>,
     #[doc = "Policy definition group names."]
-    #[serde(rename = "policyDefinitionGroupNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitionGroupNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definition_group_names: Vec<String>,
     #[doc = "Components state compliance records populated only when URL contains $expand=components clause."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub components: Vec<ComponentStateDetails>,
     #[doc = "Evaluated policy definition version."]
     #[serde(rename = "policyDefinitionVersion", default, skip_serializing_if = "Option::is_none")]
@@ -859,7 +940,11 @@ pub struct PolicyStatesQueryResults {
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
     #[doc = "Query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyState>,
 }
 impl azure_core::Continuable for PolicyStatesQueryResults {
@@ -901,7 +986,11 @@ impl PolicyTrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyTrackedResourcesQueryResults {
     #[doc = "Query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyTrackedResource>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1027,7 +1116,11 @@ impl RemediationDeploymentSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RemediationDeploymentsListResult {
     #[doc = "Array of deployments for the remediation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RemediationDeployment>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1048,7 +1141,11 @@ impl RemediationDeploymentsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RemediationFilters {
     #[doc = "The resource locations that will be remediated."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl RemediationFilters {
@@ -1060,7 +1157,11 @@ impl RemediationFilters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RemediationListResult {
     #[doc = "Array of remediation definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Remediation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1181,7 +1282,11 @@ pub struct SummarizeResults {
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
     pub odata_count: Option<i32>,
     #[doc = "Summarize action results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Summary>,
 }
 impl SummarizeResults {
@@ -1202,7 +1307,12 @@ pub struct Summary {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub results: Option<SummaryResults>,
     #[doc = "Policy assignments summary."]
-    #[serde(rename = "policyAssignments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyAssignments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_assignments: Vec<PolicyAssignmentSummary>,
 }
 impl Summary {
@@ -1223,13 +1333,28 @@ pub struct SummaryResults {
     #[serde(rename = "nonCompliantPolicies", default, skip_serializing_if = "Option::is_none")]
     pub non_compliant_policies: Option<i32>,
     #[doc = "The resources summary at this level."]
-    #[serde(rename = "resourceDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_details: Vec<ComplianceDetail>,
     #[doc = "The policy artifact summary at this level. For query scope level, it represents policy assignment summary. For policy assignment level, it represents policy definitions summary."]
-    #[serde(rename = "policyDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_details: Vec<ComplianceDetail>,
     #[doc = "The policy definition group summary at this level."]
-    #[serde(rename = "policyGroupDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyGroupDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_group_details: Vec<ComplianceDetail>,
 }
 impl SummaryResults {
diff --git a/services/mgmt/policyinsights/src/package_2021_01/models.rs b/services/mgmt/policyinsights/src/package_2021_01/models.rs
index 64413864e2..b0f2c03f3d 100644
--- a/services/mgmt/policyinsights/src/package_2021_01/models.rs
+++ b/services/mgmt/policyinsights/src/package_2021_01/models.rs
@@ -42,7 +42,11 @@ impl AttestationEvidence {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AttestationListResult {
     #[doc = "Array of attestation definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Attestation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -81,7 +85,11 @@ pub struct AttestationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub comments: Option<String>,
     #[doc = "The evidence supporting the compliance state set in this attestation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub evidence: Vec<AttestationEvidence>,
     #[doc = "The status of the attestation."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -154,7 +162,12 @@ pub struct CheckRestrictionsRequest {
     #[serde(rename = "resourceDetails")]
     pub resource_details: CheckRestrictionsResourceDetails,
     #[doc = "The list of fields and values that should be evaluated for potential restrictions."]
-    #[serde(rename = "pendingFields", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pendingFields",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pending_fields: Vec<PendingField>,
 }
 impl CheckRestrictionsRequest {
@@ -191,7 +204,12 @@ impl CheckRestrictionsResourceDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CheckRestrictionsResult {
     #[doc = "The restrictions that will be placed on various fields in the resource by policy."]
-    #[serde(rename = "fieldRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_restrictions: Vec<FieldRestrictions>,
     #[doc = "Evaluation results for the provided partial resource content."]
     #[serde(rename = "contentEvaluationResult", default, skip_serializing_if = "Option::is_none")]
@@ -208,7 +226,12 @@ pub mod check_restrictions_result {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ContentEvaluationResult {
         #[doc = "Policy evaluation results against the given resource content. This will indicate if the partial content that was provided will be denied as-is."]
-        #[serde(rename = "policyEvaluations", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "policyEvaluations",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub policy_evaluations: Vec<PolicyEvaluationResult>,
     }
     impl ContentEvaluationResult {
@@ -299,10 +322,19 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
     #[doc = "Additional scenario specific error details."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<TypedErrorInfo>,
 }
 impl ErrorDefinition {
@@ -368,7 +400,11 @@ pub struct FieldRestriction {
     #[serde(rename = "defaultValue", default, skip_serializing_if = "Option::is_none")]
     pub default_value: Option<String>,
     #[doc = "The values that policy either requires or denies for the field."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Resource identifiers for a policy."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -428,7 +464,11 @@ pub struct FieldRestrictions {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub field: Option<String>,
     #[doc = "The restrictions placed on that field by policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<FieldRestriction>,
 }
 impl FieldRestrictions {
@@ -498,7 +538,11 @@ pub struct OperationsListResults {
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
     pub odata_count: Option<i32>,
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationsListResults {
@@ -512,7 +556,11 @@ pub struct PendingField {
     #[doc = "The name of the field. This can be a top-level property like 'name' or 'type' or an Azure Policy field alias."]
     pub field: String,
     #[doc = "The list of potential values for the field that should be evaluated against Azure Policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl PendingField {
@@ -533,10 +581,20 @@ pub struct PolicyAssignmentSummary {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub results: Option<SummaryResults>,
     #[doc = "Policy definitions summary."]
-    #[serde(rename = "policyDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definitions: Vec<PolicyDefinitionSummary>,
     #[doc = "Policy definition group summary."]
-    #[serde(rename = "policyGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_groups: Vec<PolicyGroupSummary>,
 }
 impl PolicyAssignmentSummary {
@@ -554,7 +612,12 @@ pub struct PolicyDefinitionSummary {
     #[serde(rename = "policyDefinitionReferenceId", default, skip_serializing_if = "Option::is_none")]
     pub policy_definition_reference_id: Option<String>,
     #[doc = "Policy definition group names."]
-    #[serde(rename = "policyDefinitionGroupNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitionGroupNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definition_group_names: Vec<String>,
     #[doc = "Policy effect, i.e. policy definition action."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -599,7 +662,12 @@ impl PolicyDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyEvaluationDetails {
     #[doc = "Details of the evaluated expressions."]
-    #[serde(rename = "evaluatedExpressions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "evaluatedExpressions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub evaluated_expressions: Vec<ExpressionEvaluationDetails>,
     #[doc = "Evaluation details of IfNotExists effect."]
     #[serde(rename = "ifNotExistsDetails", default, skip_serializing_if = "Option::is_none")]
@@ -722,7 +790,11 @@ pub struct PolicyEvent {
     #[serde(rename = "principalOid", default, skip_serializing_if = "Option::is_none")]
     pub principal_oid: Option<String>,
     #[doc = "Components events records populated only when URL contains $expand=components clause."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub components: Vec<ComponentEventDetails>,
 }
 impl PolicyEvent {
@@ -743,7 +815,11 @@ pub struct PolicyEventsQueryResults {
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
     #[doc = "Query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyEvent>,
 }
 impl azure_core::Continuable for PolicyEventsQueryResults {
@@ -797,7 +873,11 @@ impl PolicyMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyMetadataCollection {
     #[doc = "Array of policy metadata definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SlimPolicyMetadata>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -970,10 +1050,19 @@ pub struct PolicyState {
     #[serde(rename = "policyEvaluationDetails", default, skip_serializing_if = "Option::is_none")]
     pub policy_evaluation_details: Option<PolicyEvaluationDetails>,
     #[doc = "Policy definition group names."]
-    #[serde(rename = "policyDefinitionGroupNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitionGroupNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definition_group_names: Vec<String>,
     #[doc = "Components state compliance records populated only when URL contains $expand=components clause."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub components: Vec<ComponentStateDetails>,
     #[doc = "Evaluated policy definition version."]
     #[serde(rename = "policyDefinitionVersion", default, skip_serializing_if = "Option::is_none")]
@@ -1003,7 +1092,11 @@ pub struct PolicyStatesQueryResults {
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
     #[doc = "Query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyState>,
 }
 impl azure_core::Continuable for PolicyStatesQueryResults {
@@ -1045,7 +1138,11 @@ impl PolicyTrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyTrackedResourcesQueryResults {
     #[doc = "Query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyTrackedResource>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1171,7 +1268,11 @@ impl RemediationDeploymentSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RemediationDeploymentsListResult {
     #[doc = "Array of deployments for the remediation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RemediationDeployment>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1192,7 +1293,11 @@ impl RemediationDeploymentsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RemediationFilters {
     #[doc = "The resource locations that will be remediated."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl RemediationFilters {
@@ -1204,7 +1309,11 @@ impl RemediationFilters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RemediationListResult {
     #[doc = "Array of remediation definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Remediation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1343,7 +1452,11 @@ pub struct SummarizeResults {
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
     pub odata_count: Option<i32>,
     #[doc = "Summarize action results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Summary>,
 }
 impl SummarizeResults {
@@ -1364,7 +1477,12 @@ pub struct Summary {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub results: Option<SummaryResults>,
     #[doc = "Policy assignments summary."]
-    #[serde(rename = "policyAssignments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyAssignments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_assignments: Vec<PolicyAssignmentSummary>,
 }
 impl Summary {
@@ -1385,13 +1503,28 @@ pub struct SummaryResults {
     #[serde(rename = "nonCompliantPolicies", default, skip_serializing_if = "Option::is_none")]
     pub non_compliant_policies: Option<i32>,
     #[doc = "The resources summary at this level."]
-    #[serde(rename = "resourceDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_details: Vec<ComplianceDetail>,
     #[doc = "The policy artifact summary at this level. For query scope level, it represents policy assignment summary. For policy assignment level, it represents policy definitions summary."]
-    #[serde(rename = "policyDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_details: Vec<ComplianceDetail>,
     #[doc = "The policy definition group summary at this level."]
-    #[serde(rename = "policyGroupDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyGroupDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_group_details: Vec<ComplianceDetail>,
 }
 impl SummaryResults {
diff --git a/services/mgmt/policyinsights/src/package_2021_10/models.rs b/services/mgmt/policyinsights/src/package_2021_10/models.rs
index f8c86bfd7f..99fb69968f 100644
--- a/services/mgmt/policyinsights/src/package_2021_10/models.rs
+++ b/services/mgmt/policyinsights/src/package_2021_10/models.rs
@@ -42,7 +42,11 @@ impl AttestationEvidence {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AttestationListResult {
     #[doc = "Array of attestation definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Attestation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -81,7 +85,11 @@ pub struct AttestationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub comments: Option<String>,
     #[doc = "The evidence supporting the compliance state set in this attestation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub evidence: Vec<AttestationEvidence>,
     #[doc = "The status of the attestation."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -154,7 +162,12 @@ pub struct CheckRestrictionsRequest {
     #[serde(rename = "resourceDetails")]
     pub resource_details: CheckRestrictionsResourceDetails,
     #[doc = "The list of fields and values that should be evaluated for potential restrictions."]
-    #[serde(rename = "pendingFields", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pendingFields",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pending_fields: Vec<PendingField>,
 }
 impl CheckRestrictionsRequest {
@@ -191,7 +204,12 @@ impl CheckRestrictionsResourceDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CheckRestrictionsResult {
     #[doc = "The restrictions that will be placed on various fields in the resource by policy."]
-    #[serde(rename = "fieldRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_restrictions: Vec<FieldRestrictions>,
     #[doc = "Evaluation results for the provided partial resource content."]
     #[serde(rename = "contentEvaluationResult", default, skip_serializing_if = "Option::is_none")]
@@ -208,7 +226,12 @@ pub mod check_restrictions_result {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ContentEvaluationResult {
         #[doc = "Policy evaluation results against the given resource content. This will indicate if the partial content that was provided will be denied as-is."]
-        #[serde(rename = "policyEvaluations", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "policyEvaluations",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub policy_evaluations: Vec<PolicyEvaluationResult>,
     }
     impl ContentEvaluationResult {
@@ -299,10 +322,19 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
     #[doc = "Additional scenario specific error details."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<TypedErrorInfo>,
 }
 impl ErrorDefinition {
@@ -368,7 +400,11 @@ pub struct FieldRestriction {
     #[serde(rename = "defaultValue", default, skip_serializing_if = "Option::is_none")]
     pub default_value: Option<String>,
     #[doc = "The values that policy either requires or denies for the field."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Resource identifiers for a policy."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -428,7 +464,11 @@ pub struct FieldRestrictions {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub field: Option<String>,
     #[doc = "The restrictions placed on that field by policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<FieldRestriction>,
 }
 impl FieldRestrictions {
@@ -498,7 +538,11 @@ pub struct OperationsListResults {
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
     pub odata_count: Option<i32>,
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationsListResults {
@@ -512,7 +556,11 @@ pub struct PendingField {
     #[doc = "The name of the field. This can be a top-level property like 'name' or 'type' or an Azure Policy field alias."]
     pub field: String,
     #[doc = "The list of potential values for the field that should be evaluated against Azure Policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl PendingField {
@@ -533,10 +581,20 @@ pub struct PolicyAssignmentSummary {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub results: Option<SummaryResults>,
     #[doc = "Policy definitions summary."]
-    #[serde(rename = "policyDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definitions: Vec<PolicyDefinitionSummary>,
     #[doc = "Policy definition group summary."]
-    #[serde(rename = "policyGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_groups: Vec<PolicyGroupSummary>,
 }
 impl PolicyAssignmentSummary {
@@ -554,7 +612,12 @@ pub struct PolicyDefinitionSummary {
     #[serde(rename = "policyDefinitionReferenceId", default, skip_serializing_if = "Option::is_none")]
     pub policy_definition_reference_id: Option<String>,
     #[doc = "Policy definition group names."]
-    #[serde(rename = "policyDefinitionGroupNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitionGroupNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definition_group_names: Vec<String>,
     #[doc = "Policy effect, i.e. policy definition action."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -599,7 +662,12 @@ impl PolicyDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyEvaluationDetails {
     #[doc = "Details of the evaluated expressions."]
-    #[serde(rename = "evaluatedExpressions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "evaluatedExpressions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub evaluated_expressions: Vec<ExpressionEvaluationDetails>,
     #[doc = "Evaluation details of IfNotExists effect."]
     #[serde(rename = "ifNotExistsDetails", default, skip_serializing_if = "Option::is_none")]
@@ -722,7 +790,11 @@ pub struct PolicyEvent {
     #[serde(rename = "principalOid", default, skip_serializing_if = "Option::is_none")]
     pub principal_oid: Option<String>,
     #[doc = "Components events records populated only when URL contains $expand=components clause."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub components: Vec<ComponentEventDetails>,
 }
 impl PolicyEvent {
@@ -743,7 +815,11 @@ pub struct PolicyEventsQueryResults {
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
     #[doc = "Query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyEvent>,
 }
 impl azure_core::Continuable for PolicyEventsQueryResults {
@@ -797,7 +873,11 @@ impl PolicyMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyMetadataCollection {
     #[doc = "Array of policy metadata definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SlimPolicyMetadata>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -970,10 +1050,19 @@ pub struct PolicyState {
     #[serde(rename = "policyEvaluationDetails", default, skip_serializing_if = "Option::is_none")]
     pub policy_evaluation_details: Option<PolicyEvaluationDetails>,
     #[doc = "Policy definition group names."]
-    #[serde(rename = "policyDefinitionGroupNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitionGroupNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definition_group_names: Vec<String>,
     #[doc = "Components state compliance records populated only when URL contains $expand=components clause."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub components: Vec<ComponentStateDetails>,
     #[doc = "Evaluated policy definition version."]
     #[serde(rename = "policyDefinitionVersion", default, skip_serializing_if = "Option::is_none")]
@@ -1003,7 +1092,11 @@ pub struct PolicyStatesQueryResults {
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
     #[doc = "Query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyState>,
 }
 impl azure_core::Continuable for PolicyStatesQueryResults {
@@ -1045,7 +1138,11 @@ impl PolicyTrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyTrackedResourcesQueryResults {
     #[doc = "Query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyTrackedResource>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1174,7 +1271,11 @@ impl RemediationDeploymentSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RemediationDeploymentsListResult {
     #[doc = "Array of deployments for the remediation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RemediationDeployment>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1195,7 +1296,11 @@ impl RemediationDeploymentsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RemediationFilters {
     #[doc = "The resource locations that will be remediated."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl RemediationFilters {
@@ -1207,7 +1312,11 @@ impl RemediationFilters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RemediationListResult {
     #[doc = "Array of remediation definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Remediation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1373,7 +1482,11 @@ pub struct SummarizeResults {
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
     pub odata_count: Option<i32>,
     #[doc = "Summarize action results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Summary>,
 }
 impl SummarizeResults {
@@ -1394,7 +1507,12 @@ pub struct Summary {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub results: Option<SummaryResults>,
     #[doc = "Policy assignments summary."]
-    #[serde(rename = "policyAssignments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyAssignments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_assignments: Vec<PolicyAssignmentSummary>,
 }
 impl Summary {
@@ -1415,13 +1533,28 @@ pub struct SummaryResults {
     #[serde(rename = "nonCompliantPolicies", default, skip_serializing_if = "Option::is_none")]
     pub non_compliant_policies: Option<i32>,
     #[doc = "The resources summary at this level."]
-    #[serde(rename = "resourceDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_details: Vec<ComplianceDetail>,
     #[doc = "The policy artifact summary at this level. For query scope level, it represents policy assignment summary. For policy assignment level, it represents policy definitions summary."]
-    #[serde(rename = "policyDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_details: Vec<ComplianceDetail>,
     #[doc = "The policy definition group summary at this level."]
-    #[serde(rename = "policyGroupDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyGroupDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_group_details: Vec<ComplianceDetail>,
 }
 impl SummaryResults {
diff --git a/services/mgmt/policyinsights/src/package_2022_03/models.rs b/services/mgmt/policyinsights/src/package_2022_03/models.rs
index 265f402792..3c61bb46ea 100644
--- a/services/mgmt/policyinsights/src/package_2022_03/models.rs
+++ b/services/mgmt/policyinsights/src/package_2022_03/models.rs
@@ -42,7 +42,11 @@ impl AttestationEvidence {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AttestationListResult {
     #[doc = "Array of attestation definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Attestation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -81,7 +85,11 @@ pub struct AttestationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub comments: Option<String>,
     #[doc = "The evidence supporting the compliance state set in this attestation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub evidence: Vec<AttestationEvidence>,
     #[doc = "The status of the attestation."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -154,7 +162,12 @@ pub struct CheckManagementGroupRestrictionsRequest {
     #[serde(rename = "resourceDetails", default, skip_serializing_if = "Option::is_none")]
     pub resource_details: Option<CheckRestrictionsResourceDetails>,
     #[doc = "The list of fields and values that should be evaluated for potential restrictions."]
-    #[serde(rename = "pendingFields", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pendingFields",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pending_fields: Vec<PendingField>,
 }
 impl CheckManagementGroupRestrictionsRequest {
@@ -169,7 +182,12 @@ pub struct CheckRestrictionsRequest {
     #[serde(rename = "resourceDetails")]
     pub resource_details: CheckRestrictionsResourceDetails,
     #[doc = "The list of fields and values that should be evaluated for potential restrictions."]
-    #[serde(rename = "pendingFields", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pendingFields",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pending_fields: Vec<PendingField>,
 }
 impl CheckRestrictionsRequest {
@@ -206,7 +224,12 @@ impl CheckRestrictionsResourceDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CheckRestrictionsResult {
     #[doc = "The restrictions that will be placed on various fields in the resource by policy."]
-    #[serde(rename = "fieldRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_restrictions: Vec<FieldRestrictions>,
     #[doc = "Evaluation results for the provided partial resource content."]
     #[serde(rename = "contentEvaluationResult", default, skip_serializing_if = "Option::is_none")]
@@ -223,7 +246,12 @@ pub mod check_restrictions_result {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct ContentEvaluationResult {
         #[doc = "Policy evaluation results against the given resource content. This will indicate if the partial content that was provided will be denied as-is."]
-        #[serde(rename = "policyEvaluations", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "policyEvaluations",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub policy_evaluations: Vec<PolicyEvaluationResult>,
     }
     impl ContentEvaluationResult {
@@ -314,10 +342,19 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
     #[doc = "Additional scenario specific error details."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<TypedErrorInfo>,
 }
 impl ErrorDefinition {
@@ -383,7 +420,11 @@ pub struct FieldRestriction {
     #[serde(rename = "defaultValue", default, skip_serializing_if = "Option::is_none")]
     pub default_value: Option<String>,
     #[doc = "The values that policy either requires or denies for the field."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Resource identifiers for a policy."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -443,7 +484,11 @@ pub struct FieldRestrictions {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub field: Option<String>,
     #[doc = "The restrictions placed on that field by policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<FieldRestriction>,
 }
 impl FieldRestrictions {
@@ -513,7 +558,11 @@ pub struct OperationsListResults {
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
     pub odata_count: Option<i32>,
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationsListResults {
@@ -527,7 +576,11 @@ pub struct PendingField {
     #[doc = "The name of the field. This can be a top-level property like 'name' or 'type' or an Azure Policy field alias."]
     pub field: String,
     #[doc = "The list of potential values for the field that should be evaluated against Azure Policy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
 }
 impl PendingField {
@@ -548,10 +601,20 @@ pub struct PolicyAssignmentSummary {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub results: Option<SummaryResults>,
     #[doc = "Policy definitions summary."]
-    #[serde(rename = "policyDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definitions: Vec<PolicyDefinitionSummary>,
     #[doc = "Policy definition group summary."]
-    #[serde(rename = "policyGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_groups: Vec<PolicyGroupSummary>,
 }
 impl PolicyAssignmentSummary {
@@ -569,7 +632,12 @@ pub struct PolicyDefinitionSummary {
     #[serde(rename = "policyDefinitionReferenceId", default, skip_serializing_if = "Option::is_none")]
     pub policy_definition_reference_id: Option<String>,
     #[doc = "Policy definition group names."]
-    #[serde(rename = "policyDefinitionGroupNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitionGroupNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definition_group_names: Vec<String>,
     #[doc = "Policy effect, i.e. policy definition action."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -614,7 +682,12 @@ impl PolicyDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyEvaluationDetails {
     #[doc = "Details of the evaluated expressions."]
-    #[serde(rename = "evaluatedExpressions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "evaluatedExpressions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub evaluated_expressions: Vec<ExpressionEvaluationDetails>,
     #[doc = "Evaluation details of IfNotExists effect."]
     #[serde(rename = "ifNotExistsDetails", default, skip_serializing_if = "Option::is_none")]
@@ -737,7 +810,11 @@ pub struct PolicyEvent {
     #[serde(rename = "principalOid", default, skip_serializing_if = "Option::is_none")]
     pub principal_oid: Option<String>,
     #[doc = "Components events records populated only when URL contains $expand=components clause."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub components: Vec<ComponentEventDetails>,
 }
 impl PolicyEvent {
@@ -758,7 +835,11 @@ pub struct PolicyEventsQueryResults {
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
     #[doc = "Query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyEvent>,
 }
 impl azure_core::Continuable for PolicyEventsQueryResults {
@@ -812,7 +893,11 @@ impl PolicyMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyMetadataCollection {
     #[doc = "Array of policy metadata definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SlimPolicyMetadata>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -985,10 +1070,19 @@ pub struct PolicyState {
     #[serde(rename = "policyEvaluationDetails", default, skip_serializing_if = "Option::is_none")]
     pub policy_evaluation_details: Option<PolicyEvaluationDetails>,
     #[doc = "Policy definition group names."]
-    #[serde(rename = "policyDefinitionGroupNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitionGroupNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definition_group_names: Vec<String>,
     #[doc = "Components state compliance records populated only when URL contains $expand=components clause."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub components: Vec<ComponentStateDetails>,
     #[doc = "Evaluated policy definition version."]
     #[serde(rename = "policyDefinitionVersion", default, skip_serializing_if = "Option::is_none")]
@@ -1018,7 +1112,11 @@ pub struct PolicyStatesQueryResults {
     #[serde(rename = "@odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
     #[doc = "Query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyState>,
 }
 impl azure_core::Continuable for PolicyStatesQueryResults {
@@ -1060,7 +1158,11 @@ impl PolicyTrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyTrackedResourcesQueryResults {
     #[doc = "Query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyTrackedResource>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1189,7 +1291,11 @@ impl RemediationDeploymentSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RemediationDeploymentsListResult {
     #[doc = "Array of deployments for the remediation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RemediationDeployment>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1210,7 +1316,11 @@ impl RemediationDeploymentsListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RemediationFilters {
     #[doc = "The resource locations that will be remediated."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl RemediationFilters {
@@ -1222,7 +1332,11 @@ impl RemediationFilters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RemediationListResult {
     #[doc = "Array of remediation definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Remediation>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1388,7 +1502,11 @@ pub struct SummarizeResults {
     #[serde(rename = "@odata.count", default, skip_serializing_if = "Option::is_none")]
     pub odata_count: Option<i32>,
     #[doc = "Summarize action results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Summary>,
 }
 impl SummarizeResults {
@@ -1409,7 +1527,12 @@ pub struct Summary {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub results: Option<SummaryResults>,
     #[doc = "Policy assignments summary."]
-    #[serde(rename = "policyAssignments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyAssignments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_assignments: Vec<PolicyAssignmentSummary>,
 }
 impl Summary {
@@ -1430,13 +1553,28 @@ pub struct SummaryResults {
     #[serde(rename = "nonCompliantPolicies", default, skip_serializing_if = "Option::is_none")]
     pub non_compliant_policies: Option<i32>,
     #[doc = "The resources summary at this level."]
-    #[serde(rename = "resourceDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_details: Vec<ComplianceDetail>,
     #[doc = "The policy artifact summary at this level. For query scope level, it represents policy assignment summary. For policy assignment level, it represents policy definitions summary."]
-    #[serde(rename = "policyDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_details: Vec<ComplianceDetail>,
     #[doc = "The policy definition group summary at this level."]
-    #[serde(rename = "policyGroupDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyGroupDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_group_details: Vec<ComplianceDetail>,
 }
 impl SummaryResults {
diff --git a/services/mgmt/portal/src/package_2015_08_01_preview/models.rs b/services/mgmt/portal/src/package_2015_08_01_preview/models.rs
index cbef8bc261..86a0720035 100644
--- a/services/mgmt/portal/src/package_2015_08_01_preview/models.rs
+++ b/services/mgmt/portal/src/package_2015_08_01_preview/models.rs
@@ -60,7 +60,11 @@ impl DashboardLens {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DashboardListResult {
     #[doc = "The array of custom resource provider manifests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Dashboard>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -155,7 +159,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -242,7 +250,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/portal/src/package_2018_10_01_preview/models.rs b/services/mgmt/portal/src/package_2018_10_01_preview/models.rs
index cbef8bc261..86a0720035 100644
--- a/services/mgmt/portal/src/package_2018_10_01_preview/models.rs
+++ b/services/mgmt/portal/src/package_2018_10_01_preview/models.rs
@@ -60,7 +60,11 @@ impl DashboardLens {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DashboardListResult {
     #[doc = "The array of custom resource provider manifests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Dashboard>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -155,7 +159,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -242,7 +250,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/portal/src/package_2019_01_01_preview/models.rs b/services/mgmt/portal/src/package_2019_01_01_preview/models.rs
index 22e031637d..087c657a60 100644
--- a/services/mgmt/portal/src/package_2019_01_01_preview/models.rs
+++ b/services/mgmt/portal/src/package_2019_01_01_preview/models.rs
@@ -21,7 +21,11 @@ impl Configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationList {
     #[doc = "The array of tenant configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -101,7 +105,11 @@ impl DashboardLens {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DashboardListResult {
     #[doc = "The array of custom resource provider manifests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Dashboard>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -196,7 +204,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -312,7 +324,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/portal/src/package_2020_09_01_preview/models.rs b/services/mgmt/portal/src/package_2020_09_01_preview/models.rs
index 8f3a72a064..af50dea29d 100644
--- a/services/mgmt/portal/src/package_2020_09_01_preview/models.rs
+++ b/services/mgmt/portal/src/package_2020_09_01_preview/models.rs
@@ -21,7 +21,11 @@ impl Configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationList {
     #[doc = "The array of tenant configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -107,7 +111,11 @@ impl DashboardLens {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DashboardListResult {
     #[doc = "The array of custom resource provider manifests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Dashboard>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -185,7 +193,11 @@ pub mod dashboard_parts {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DashboardProperties {
     #[doc = "The dashboard lenses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub lenses: Vec<DashboardLens>,
     #[doc = "The dashboard metadata."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -206,7 +218,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -238,7 +254,11 @@ pub struct MarkdownPartMetadata {
     #[serde(flatten)]
     pub dashboard_part_metadata: DashboardPartMetadata,
     #[doc = "Input to dashboard part."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<serde_json::Value>,
     #[doc = "Markdown part settings."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -400,7 +420,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of operations supported by this resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -439,7 +463,11 @@ impl Violation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ViolationsList {
     #[doc = "The array of violations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Violation>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/postgresql/src/package_2021_06_15_privatepreview/models.rs b/services/mgmt/postgresql/src/package_2021_06_15_privatepreview/models.rs
index 5a8daa2c41..84dade3f32 100644
--- a/services/mgmt/postgresql/src/package_2021_06_15_privatepreview/models.rs
+++ b/services/mgmt/postgresql/src/package_2021_06_15_privatepreview/models.rs
@@ -100,7 +100,11 @@ pub mod backup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesListResult {
     #[doc = "A list of supported capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapabilityProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -132,9 +136,19 @@ pub struct CapabilityProperties {
     #[doc = "A value indicating whether a new server in this region can have geo-backups to paired region."]
     #[serde(rename = "zoneRedundantHaAndGeoBackupSupported", default, skip_serializing_if = "Option::is_none")]
     pub zone_redundant_ha_and_geo_backup_supported: Option<bool>,
-    #[serde(rename = "supportedFlexibleServerEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFlexibleServerEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_flexible_server_editions: Vec<FlexibleServerEditionCapability>,
-    #[serde(rename = "supportedHyperscaleNodeEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedHyperscaleNodeEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_hyperscale_node_editions: Vec<HyperscaleNodeEditionCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -184,7 +198,11 @@ impl Configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -333,10 +351,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -368,7 +395,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of firewall rules in a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -410,10 +441,20 @@ pub struct FlexibleServerEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of editions supported by this server edition."]
-    #[serde(rename = "supportedStorageEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_editions: Vec<StorageEditionCapability>,
     #[doc = "The list of server versions supported by this server edition."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -534,13 +575,28 @@ pub struct HyperscaleNodeEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of editions supported by this server edition."]
-    #[serde(rename = "supportedStorageEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_editions: Vec<StorageEditionCapability>,
     #[doc = "The list of server versions supported by this server edition."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
     #[doc = "The list of Node Types supported by this server edition."]
-    #[serde(rename = "supportedNodeTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedNodeTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_node_types: Vec<NodeTypeCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -755,7 +811,11 @@ impl MigrationResourceGroup {
 #[doc = "A list of migration resources."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationResourceListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrationResource>,
     #[doc = "The link used to get the next page of migrations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -800,7 +860,12 @@ pub struct MigrationResourceProperties {
     pub user_assigned_identity_resource_id: Option<String>,
     #[serde(rename = "targetDBServerResourceId", default, skip_serializing_if = "Option::is_none")]
     pub target_db_server_resource_id: Option<String>,
-    #[serde(rename = "dBsToMigrate", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dBsToMigrate",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub d_bs_to_migrate: Vec<String>,
     #[doc = "Migration resource group."]
     #[serde(rename = "migrationResourceGroup", default, skip_serializing_if = "Option::is_none")]
@@ -835,7 +900,12 @@ pub struct MigrationResourcePropertiesForPatch {
     pub secret_parameters: Option<MigrationSecretParameters>,
     #[serde(rename = "userAssignedIdentityResourceId", default, skip_serializing_if = "Option::is_none")]
     pub user_assigned_identity_resource_id: Option<String>,
-    #[serde(rename = "dBsToMigrate", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dBsToMigrate",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub d_bs_to_migrate: Vec<String>,
     #[doc = "Migration resource group."]
     #[serde(rename = "migrationResourceGroup", default, skip_serializing_if = "Option::is_none")]
@@ -1221,7 +1291,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1373,7 +1447,11 @@ impl ServerForUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "The list of flexible servers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1707,7 +1785,12 @@ pub struct ServerVersionCapability {
     #[doc = "server version"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
-    #[serde(rename = "supportedVcores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedVcores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_vcores: Vec<VcoreCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1809,7 +1892,12 @@ pub struct StorageEditionCapability {
     #[doc = "storage edition name"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
-    #[serde(rename = "supportedStorageMB", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageMB",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_mb: Vec<StorageMbCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1900,7 +1988,12 @@ impl VirtualNetworkSubnetUsageParameter {
 #[doc = "Virtual network subnet usage data."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkSubnetUsageResult {
-    #[serde(rename = "delegatedSubnetsUsage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "delegatedSubnetsUsage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegated_subnets_usage: Vec<DelegatedSubnetUsage>,
 }
 impl VirtualNetworkSubnetUsageResult {
diff --git a/services/mgmt/postgresql/src/package_flexibleserver_2021_06/models.rs b/services/mgmt/postgresql/src/package_flexibleserver_2021_06/models.rs
index 0ca51d6cc2..551f10aa5e 100644
--- a/services/mgmt/postgresql/src/package_flexibleserver_2021_06/models.rs
+++ b/services/mgmt/postgresql/src/package_flexibleserver_2021_06/models.rs
@@ -70,7 +70,11 @@ pub mod backup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesListResult {
     #[doc = "A list of supported capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapabilityProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -102,12 +106,27 @@ pub struct CapabilityProperties {
     #[doc = "A value indicating whether a new server in this region can have geo-backups to paired region."]
     #[serde(rename = "zoneRedundantHaAndGeoBackupSupported", default, skip_serializing_if = "Option::is_none")]
     pub zone_redundant_ha_and_geo_backup_supported: Option<bool>,
-    #[serde(rename = "supportedFlexibleServerEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFlexibleServerEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_flexible_server_editions: Vec<FlexibleServerEditionCapability>,
-    #[serde(rename = "supportedHyperscaleNodeEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedHyperscaleNodeEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_hyperscale_node_editions: Vec<HyperscaleNodeEditionCapability>,
     #[doc = "Supported high availability mode"]
-    #[serde(rename = "supportedHAMode", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedHAMode",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_ha_mode: Vec<String>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -157,7 +176,11 @@ impl Configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -281,7 +304,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of databases housed in a server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "The link used to get the next page of databases."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -356,10 +383,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -391,7 +427,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of firewall rules in a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -433,10 +473,20 @@ pub struct FlexibleServerEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of editions supported by this server edition."]
-    #[serde(rename = "supportedStorageEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_editions: Vec<StorageEditionCapability>,
     #[doc = "The list of server versions supported by this server edition."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -562,13 +612,28 @@ pub struct HyperscaleNodeEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of editions supported by this server edition."]
-    #[serde(rename = "supportedStorageEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_editions: Vec<StorageEditionCapability>,
     #[doc = "The list of server versions supported by this server edition."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
     #[doc = "The list of Node Types supported by this server edition."]
-    #[serde(rename = "supportedNodeTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedNodeTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_node_types: Vec<NodeTypeCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -847,7 +912,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -996,7 +1065,11 @@ impl ServerForUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "The list of flexible servers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1275,7 +1348,12 @@ pub struct ServerVersionCapability {
     #[doc = "server version"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
-    #[serde(rename = "supportedVcores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedVcores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_vcores: Vec<VcoreCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1359,7 +1437,12 @@ pub struct StorageEditionCapability {
     #[doc = "storage edition name"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
-    #[serde(rename = "supportedStorageMB", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageMB",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_mb: Vec<StorageMbCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1456,7 +1539,12 @@ pub struct VirtualNetworkSubnetUsageResult {
     #[doc = "The subscription ID."]
     #[serde(rename = "subscriptionId", default, skip_serializing_if = "Option::is_none")]
     pub subscription_id: Option<String>,
-    #[serde(rename = "delegatedSubnetsUsage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "delegatedSubnetsUsage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegated_subnets_usage: Vec<DelegatedSubnetUsage>,
 }
 impl VirtualNetworkSubnetUsageResult {
diff --git a/services/mgmt/postgresql/src/package_flexibleserver_2021_06_preview/models.rs b/services/mgmt/postgresql/src/package_flexibleserver_2021_06_preview/models.rs
index 59807d4ee3..0415b5a695 100644
--- a/services/mgmt/postgresql/src/package_flexibleserver_2021_06_preview/models.rs
+++ b/services/mgmt/postgresql/src/package_flexibleserver_2021_06_preview/models.rs
@@ -29,7 +29,11 @@ impl AdvisorProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdvisorsResultList {
     #[doc = "The list of recommendation action advisors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Advisor>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -113,7 +117,11 @@ pub mod backup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesListResult {
     #[doc = "A list of supported capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapabilityProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -145,9 +153,19 @@ pub struct CapabilityProperties {
     #[doc = "A value indicating whether a new server in this region can have geo-backups to paired region."]
     #[serde(rename = "zoneRedundantHaAndGeoBackupSupported", default, skip_serializing_if = "Option::is_none")]
     pub zone_redundant_ha_and_geo_backup_supported: Option<bool>,
-    #[serde(rename = "supportedFlexibleServerEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFlexibleServerEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_flexible_server_editions: Vec<FlexibleServerEditionCapability>,
-    #[serde(rename = "supportedHyperscaleNodeEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedHyperscaleNodeEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_hyperscale_node_editions: Vec<HyperscaleNodeEditionCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -197,7 +215,11 @@ impl Configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -321,7 +343,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of databases housed in a server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "The link used to get the next page of databases."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -396,10 +422,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -431,7 +466,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of firewall rules in a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -473,10 +512,20 @@ pub struct FlexibleServerEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of editions supported by this server edition."]
-    #[serde(rename = "supportedStorageEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_editions: Vec<StorageEditionCapability>,
     #[doc = "The list of server versions supported by this server edition."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -602,13 +651,28 @@ pub struct HyperscaleNodeEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of editions supported by this server edition."]
-    #[serde(rename = "supportedStorageEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_editions: Vec<StorageEditionCapability>,
     #[doc = "The list of server versions supported by this server edition."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
     #[doc = "The list of Node Types supported by this server edition."]
-    #[serde(rename = "supportedNodeTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedNodeTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_node_types: Vec<NodeTypeCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -887,7 +951,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -995,7 +1063,12 @@ pub struct QueryStatisticProperties {
     #[serde(rename = "aggregationFunction", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_function: Option<String>,
     #[doc = "The list of database names."]
-    #[serde(rename = "databaseNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "databaseNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub database_names: Vec<String>,
     #[doc = "Number of query executions in this time interval."]
     #[serde(rename = "queryExecutionCount", default, skip_serializing_if = "Option::is_none")]
@@ -1051,7 +1124,11 @@ impl QueryTextProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryTextsResultList {
     #[doc = "The list of query texts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueryText>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1119,7 +1196,11 @@ impl RecommendationActionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecommendationActionsResultList {
     #[doc = "The list of recommendation action advisors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecommendationAction>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1262,7 +1343,11 @@ impl ServerForUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "The list of flexible servers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1538,7 +1623,12 @@ pub struct ServerVersionCapability {
     #[doc = "server version"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
-    #[serde(rename = "supportedVcores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedVcores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_vcores: Vec<VcoreCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1622,7 +1712,12 @@ pub struct StorageEditionCapability {
     #[doc = "storage edition name"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
-    #[serde(rename = "supportedStorageMB", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageMB",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_mb: Vec<StorageMbCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1710,7 +1805,11 @@ impl TopQueryStatisticsInputProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopQueryStatisticsResultList {
     #[doc = "The list of top query statistics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueryStatistic>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1786,7 +1885,12 @@ impl VirtualNetworkSubnetUsageParameter {
 #[doc = "Virtual network subnet usage data."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkSubnetUsageResult {
-    #[serde(rename = "delegatedSubnetsUsage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "delegatedSubnetsUsage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegated_subnets_usage: Vec<DelegatedSubnetUsage>,
 }
 impl VirtualNetworkSubnetUsageResult {
@@ -1885,7 +1989,11 @@ impl WaitStatisticsInputProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WaitStatisticsResultList {
     #[doc = "The list of wait statistics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WaitStatistic>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/postgresql/src/package_flexibleserver_2022_01_preview/models.rs b/services/mgmt/postgresql/src/package_flexibleserver_2022_01_preview/models.rs
index aca48bb8e8..54a85c6b82 100644
--- a/services/mgmt/postgresql/src/package_flexibleserver_2022_01_preview/models.rs
+++ b/services/mgmt/postgresql/src/package_flexibleserver_2022_01_preview/models.rs
@@ -70,7 +70,11 @@ pub mod backup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesListResult {
     #[doc = "A list of supported capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapabilityProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -94,7 +98,12 @@ pub struct CapabilityProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub zone: Option<String>,
     #[doc = "Supported high availability mode"]
-    #[serde(rename = "supportedHAMode", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedHAMode",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_ha_mode: Vec<String>,
     #[doc = "A value indicating whether a new server in this region can have geo-backups to paired region."]
     #[serde(rename = "geoBackupSupported", default, skip_serializing_if = "Option::is_none")]
@@ -105,9 +114,19 @@ pub struct CapabilityProperties {
     #[doc = "A value indicating whether a new server in this region can have geo-backups to paired region."]
     #[serde(rename = "zoneRedundantHaAndGeoBackupSupported", default, skip_serializing_if = "Option::is_none")]
     pub zone_redundant_ha_and_geo_backup_supported: Option<bool>,
-    #[serde(rename = "supportedFlexibleServerEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFlexibleServerEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_flexible_server_editions: Vec<FlexibleServerEditionCapability>,
-    #[serde(rename = "supportedHyperscaleNodeEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedHyperscaleNodeEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_hyperscale_node_editions: Vec<HyperscaleNodeEditionCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -157,7 +176,11 @@ impl Configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -281,7 +304,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of databases housed in a server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "The link used to get the next page of databases."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -356,10 +383,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -391,7 +427,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of firewall rules in a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -433,10 +473,20 @@ pub struct FlexibleServerEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of editions supported by this server edition."]
-    #[serde(rename = "supportedStorageEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_editions: Vec<StorageEditionCapability>,
     #[doc = "The list of server versions supported by this server edition."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -564,13 +614,28 @@ pub struct HyperscaleNodeEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of editions supported by this server edition."]
-    #[serde(rename = "supportedStorageEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_editions: Vec<StorageEditionCapability>,
     #[doc = "The list of server versions supported by this server edition."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
     #[doc = "The list of Node Types supported by this server edition."]
-    #[serde(rename = "supportedNodeTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedNodeTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_node_types: Vec<NodeTypeCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -849,7 +914,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -995,7 +1064,11 @@ impl ServerBackup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerBackupListResult {
     #[doc = "The list of backups of a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerBackup>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1054,7 +1127,11 @@ impl ServerForUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "The list of flexible servers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1333,7 +1410,12 @@ pub struct ServerVersionCapability {
     #[doc = "server version"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
-    #[serde(rename = "supportedVcores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedVcores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_vcores: Vec<VcoreCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1417,7 +1499,12 @@ pub struct StorageEditionCapability {
     #[doc = "storage edition name"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
-    #[serde(rename = "supportedStorageMB", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageMB",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_mb: Vec<StorageMbCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1508,7 +1595,12 @@ impl VirtualNetworkSubnetUsageParameter {
 #[doc = "Virtual network subnet usage data."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkSubnetUsageResult {
-    #[serde(rename = "delegatedSubnetsUsage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "delegatedSubnetsUsage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegated_subnets_usage: Vec<DelegatedSubnetUsage>,
     #[doc = "location of the delegated subnet usage"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/postgresql/src/package_flexibleserver_2022_03_privatepreview/models.rs b/services/mgmt/postgresql/src/package_flexibleserver_2022_03_privatepreview/models.rs
index 273a0d7a20..88f686c3e1 100644
--- a/services/mgmt/postgresql/src/package_flexibleserver_2022_03_privatepreview/models.rs
+++ b/services/mgmt/postgresql/src/package_flexibleserver_2022_03_privatepreview/models.rs
@@ -97,7 +97,11 @@ impl CachedServerNameRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesListResult {
     #[doc = "A list of supported capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapabilityProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -121,7 +125,12 @@ pub struct CapabilityProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub zone: Option<String>,
     #[doc = "Supported high availability mode"]
-    #[serde(rename = "supportedHAMode", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedHAMode",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_ha_mode: Vec<String>,
     #[doc = "A value indicating whether a new server in this region can have geo-backups to paired region."]
     #[serde(rename = "geoBackupSupported", default, skip_serializing_if = "Option::is_none")]
@@ -132,9 +141,19 @@ pub struct CapabilityProperties {
     #[doc = "A value indicating whether a new server in this region can have geo-backups to paired region."]
     #[serde(rename = "zoneRedundantHaAndGeoBackupSupported", default, skip_serializing_if = "Option::is_none")]
     pub zone_redundant_ha_and_geo_backup_supported: Option<bool>,
-    #[serde(rename = "supportedFlexibleServerEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFlexibleServerEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_flexible_server_editions: Vec<FlexibleServerEditionCapability>,
-    #[serde(rename = "supportedHyperscaleNodeEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedHyperscaleNodeEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_hyperscale_node_editions: Vec<HyperscaleNodeEditionCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -184,7 +203,11 @@ impl Configuration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConfigurationListResult {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Configuration>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -308,7 +331,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of databases housed in a server"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "The link used to get the next page of databases."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -383,10 +410,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -418,7 +454,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of firewall rules in a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -460,10 +500,20 @@ pub struct FlexibleServerEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of editions supported by this server edition."]
-    #[serde(rename = "supportedStorageEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_editions: Vec<StorageEditionCapability>,
     #[doc = "The list of server versions supported by this server edition."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -591,13 +641,28 @@ pub struct HyperscaleNodeEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of editions supported by this server edition."]
-    #[serde(rename = "supportedStorageEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_editions: Vec<StorageEditionCapability>,
     #[doc = "The list of server versions supported by this server edition."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
     #[doc = "The list of Node Types supported by this server edition."]
-    #[serde(rename = "supportedNodeTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedNodeTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_node_types: Vec<NodeTypeCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -876,7 +941,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1022,7 +1091,11 @@ impl ServerBackup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerBackupListResult {
     #[doc = "The list of backups of a server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerBackup>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1081,7 +1154,11 @@ impl ServerForUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "The list of flexible servers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1360,7 +1437,12 @@ pub struct ServerVersionCapability {
     #[doc = "server version"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
-    #[serde(rename = "supportedVcores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedVcores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_vcores: Vec<VcoreCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1444,7 +1526,12 @@ pub struct StorageEditionCapability {
     #[doc = "storage edition name"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
-    #[serde(rename = "supportedStorageMB", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageMB",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_mb: Vec<StorageMbCapability>,
     #[doc = "The status"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1535,7 +1622,12 @@ impl VirtualNetworkSubnetUsageParameter {
 #[doc = "Virtual network subnet usage data."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkSubnetUsageResult {
-    #[serde(rename = "delegatedSubnetsUsage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "delegatedSubnetsUsage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delegated_subnets_usage: Vec<DelegatedSubnetUsage>,
     #[doc = "location of the delegated subnet usage"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/postgresqlhsc/src/package_2020_10_05_privatepreview/models.rs b/services/mgmt/postgresqlhsc/src/package_2020_10_05_privatepreview/models.rs
index 59e09b8187..f14378bd6c 100644
--- a/services/mgmt/postgresqlhsc/src/package_2020_10_05_privatepreview/models.rs
+++ b/services/mgmt/postgresqlhsc/src/package_2020_10_05_privatepreview/models.rs
@@ -88,7 +88,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -120,7 +124,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of firewall rules in a server group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
 }
 impl azure_core::Continuable for FirewallRuleListResult {
@@ -311,7 +319,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Collection of available operation details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -417,7 +429,11 @@ impl Role {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleListResult {
     #[doc = "The list of roles in a server group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Role>,
 }
 impl azure_core::Continuable for RoleListResult {
@@ -463,7 +479,11 @@ impl ServerConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerConfigurationListResult {
     #[doc = "The list of server configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerConfiguration>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -599,7 +619,11 @@ impl ServerGroupConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerGroupConfigurationListResult {
     #[doc = "The list of server group configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerGroupConfiguration>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -708,7 +732,11 @@ impl ServerGroupForUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerGroupListResult {
     #[doc = "The list of server groups"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerGroup>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -783,7 +811,12 @@ pub struct ServerGroupProperties {
     #[serde(rename = "privateDnsZoneArguments", default, skip_serializing_if = "Option::is_none")]
     pub private_dns_zone_arguments: Option<server_group_properties::PrivateDnsZoneArguments>,
     #[doc = "The array of read replica server groups."]
-    #[serde(rename = "readReplicas", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "readReplicas",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub read_replicas: Vec<String>,
     #[doc = "The source server group id for read replica server groups."]
     #[serde(rename = "sourceServerGroup", default, skip_serializing_if = "Option::is_none")]
@@ -969,7 +1002,11 @@ impl ServerGroupServer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerGroupServerListResult {
     #[doc = "The list of servers in a server group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerGroupServer>,
 }
 impl azure_core::Continuable for ServerGroupServerListResult {
@@ -1199,7 +1236,12 @@ pub struct ServerRoleGroup {
     #[serde(rename = "serverCount", default, skip_serializing_if = "Option::is_none")]
     pub server_count: Option<i32>,
     #[doc = "The list of server names in the server role group."]
-    #[serde(rename = "serverNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_names: Vec<ServerNameItem>,
 }
 impl ServerRoleGroup {
diff --git a/services/mgmt/powerbidedicated/src/package_2017_10_01/models.rs b/services/mgmt/powerbidedicated/src/package_2017_10_01/models.rs
index 59738ef3bc..3612a80501 100644
--- a/services/mgmt/powerbidedicated/src/package_2017_10_01/models.rs
+++ b/services/mgmt/powerbidedicated/src/package_2017_10_01/models.rs
@@ -74,7 +74,11 @@ impl DedicatedCapacity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedCapacityAdministrators {
     #[doc = "An array of administrator user identities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub members: Vec<String>,
 }
 impl DedicatedCapacityAdministrators {
@@ -331,7 +335,11 @@ pub struct MetricSpecification {
     #[serde(rename = "metricFilterPattern", default, skip_serializing_if = "Option::is_none")]
     pub metric_filter_pattern: Option<String>,
     #[doc = "For describing multi dimensional metrics"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<serde_json::Value>,
 }
 impl MetricSpecification {
@@ -400,7 +408,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of capacities supported by the Microsoft.PowerBIDedicated resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -513,10 +525,20 @@ pub mod resource_sku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications for exposing performance metrics to shoebox."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "Log specifications for exposing diagnostic logs to shoebox."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -543,7 +565,11 @@ impl SkuDetailsForExistingResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuEnumerationForExistingResourceResult {
     #[doc = "The collection of available SKUs for existing resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuDetailsForExistingResource>,
 }
 impl SkuEnumerationForExistingResourceResult {
@@ -555,7 +581,11 @@ impl SkuEnumerationForExistingResourceResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuEnumerationForNewResourceResult {
     #[doc = "The collection of available SKUs for new resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceSku>,
 }
 impl SkuEnumerationForNewResourceResult {
diff --git a/services/mgmt/powerbidedicated/src/package_2021_01_01/models.rs b/services/mgmt/powerbidedicated/src/package_2021_01_01/models.rs
index dca7b83db1..d58486927b 100644
--- a/services/mgmt/powerbidedicated/src/package_2021_01_01/models.rs
+++ b/services/mgmt/powerbidedicated/src/package_2021_01_01/models.rs
@@ -322,7 +322,11 @@ impl DedicatedCapacity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedCapacityAdministrators {
     #[doc = "An array of administrator user identities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub members: Vec<String>,
 }
 impl DedicatedCapacityAdministrators {
@@ -660,7 +664,11 @@ pub struct MetricSpecification {
     #[serde(rename = "metricFilterPattern", default, skip_serializing_if = "Option::is_none")]
     pub metric_filter_pattern: Option<String>,
     #[doc = "For describing multi dimensional metrics"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<serde_json::Value>,
 }
 impl MetricSpecification {
@@ -729,7 +737,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of capacities supported by the Microsoft.PowerBIDedicated resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -783,10 +795,20 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications for exposing performance metrics to shoebox."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "Log specifications for exposing diagnostic logs to shoebox."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -813,7 +835,11 @@ impl SkuDetailsForExistingResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuEnumerationForExistingResourceResult {
     #[doc = "The collection of available SKUs for existing resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuDetailsForExistingResource>,
 }
 impl SkuEnumerationForExistingResourceResult {
@@ -825,7 +851,11 @@ impl SkuEnumerationForExistingResourceResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuEnumerationForNewResourceResult {
     #[doc = "The collection of available SKUs for new resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CapacitySku>,
 }
 impl SkuEnumerationForNewResourceResult {
diff --git a/services/mgmt/powerbiembedded/src/package_2016_01/models.rs b/services/mgmt/powerbiembedded/src/package_2016_01/models.rs
index 34c3d9cddf..c314c299c0 100644
--- a/services/mgmt/powerbiembedded/src/package_2016_01/models.rs
+++ b/services/mgmt/powerbiembedded/src/package_2016_01/models.rs
@@ -205,7 +205,11 @@ pub struct Error {
     pub message: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
 }
 impl azure_core::Continuable for Error {
@@ -238,7 +242,11 @@ pub struct MigrateWorkspaceCollectionRequest {
     #[doc = "Name of the resource group the Power BI workspace collections will be migrated to."]
     #[serde(rename = "targetResourceGroup", default, skip_serializing_if = "Option::is_none")]
     pub target_resource_group: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
 }
 impl MigrateWorkspaceCollectionRequest {
@@ -261,7 +269,11 @@ impl Operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationList {
@@ -366,7 +378,11 @@ impl WorkspaceCollectionAccessKeys {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceCollectionList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkspaceCollection>,
 }
 impl azure_core::Continuable for WorkspaceCollectionList {
@@ -382,7 +398,11 @@ impl WorkspaceCollectionList {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
 }
 impl azure_core::Continuable for WorkspaceList {
diff --git a/services/mgmt/powerbiprivatelinks/src/package_2020_06_01/models.rs b/services/mgmt/powerbiprivatelinks/src/package_2020_06_01/models.rs
index da70b2dfaf..ebee49da3f 100644
--- a/services/mgmt/powerbiprivatelinks/src/package_2020_06_01/models.rs
+++ b/services/mgmt/powerbiprivatelinks/src/package_2020_06_01/models.rs
@@ -124,10 +124,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -165,7 +174,12 @@ pub struct GroupConnectivityInformation {
     #[serde(rename = "internalFqdn", default, skip_serializing_if = "Option::is_none")]
     pub internal_fqdn: Option<String>,
     #[doc = "Specifies the customer visible FQDNs of the group connectivity information."]
-    #[serde(rename = "customerVisibleFqdns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customerVisibleFqdns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customer_visible_fqdns: Vec<String>,
     #[doc = "Specifies the ARM region of the group connectivity information."]
     #[serde(rename = "privateLinkServiceArmRegion", default, skip_serializing_if = "Option::is_none")]
@@ -305,7 +319,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -359,7 +377,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Specifies the name of the private endpoint connection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -491,10 +513,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -506,7 +538,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "A collection of private endpoint connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -529,7 +565,12 @@ pub struct PrivateLinkServiceConnection {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Specifies the group ids of the private link service connection."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "Specifies the request message of the private link service connection."]
     #[serde(rename = "requestMessage", default, skip_serializing_if = "Option::is_none")]
@@ -546,7 +587,12 @@ pub struct PrivateLinkServiceProxy {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Specifies the group connectivity information of the private link service proxy."]
-    #[serde(rename = "groupConnectivityInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupConnectivityInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_connectivity_information: Vec<GroupConnectivityInformation>,
     #[doc = "ConnectionState information."]
     #[serde(
@@ -580,7 +626,12 @@ pub struct TenantProperties {
     #[serde(rename = "tenantId", default, skip_serializing_if = "Option::is_none")]
     pub tenant_id: Option<String>,
     #[doc = "Specifies the private endpoint connections of the resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl TenantProperties {
diff --git a/services/mgmt/powerplatform/src/package_2020_10_30_preview/models.rs b/services/mgmt/powerplatform/src/package_2020_10_30_preview/models.rs
index 0ee9f967f9..61b366c9d4 100644
--- a/services/mgmt/powerplatform/src/package_2020_10_30_preview/models.rs
+++ b/services/mgmt/powerplatform/src/package_2020_10_30_preview/models.rs
@@ -28,7 +28,11 @@ impl Account {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountList {
     #[doc = "Result of the list accounts operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -160,7 +164,11 @@ impl Serialize for EnterprisePolicyKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EnterprisePolicyList {
     #[doc = "Result of the list EnterprisePolicy operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnterprisePolicy>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -205,10 +213,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -378,7 +395,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -485,7 +506,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -619,7 +644,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -640,10 +669,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -812,7 +851,11 @@ impl VirtualNetworkProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkPropertiesList {
     #[doc = "Array of virtual networks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkProperties>,
     #[doc = "Next page link if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/privatedns/src/package_2018_09/models.rs b/services/mgmt/privatedns/src/package_2018_09/models.rs
index 551232a709..090f0b1294 100644
--- a/services/mgmt/privatedns/src/package_2018_09/models.rs
+++ b/services/mgmt/privatedns/src/package_2018_09/models.rs
@@ -58,7 +58,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -114,7 +118,11 @@ impl PrivateZone {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateZoneListResult {
     #[doc = "Information about the Private DNS zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateZone>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -270,7 +278,11 @@ impl RecordSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecordSetListResult {
     #[doc = "Information about the record sets in the response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecordSet>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -303,28 +315,58 @@ pub struct RecordSetProperties {
     #[serde(rename = "isAutoRegistered", default, skip_serializing_if = "Option::is_none")]
     pub is_auto_registered: Option<bool>,
     #[doc = "The list of A records in the record set."]
-    #[serde(rename = "aRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub a_records: Vec<ARecord>,
     #[doc = "The list of AAAA records in the record set."]
-    #[serde(rename = "aaaaRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aaaaRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aaaa_records: Vec<AaaaRecord>,
     #[doc = "A CNAME record."]
     #[serde(rename = "cnameRecord", default, skip_serializing_if = "Option::is_none")]
     pub cname_record: Option<CnameRecord>,
     #[doc = "The list of MX records in the record set."]
-    #[serde(rename = "mxRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mxRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mx_records: Vec<MxRecord>,
     #[doc = "The list of PTR records in the record set."]
-    #[serde(rename = "ptrRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ptrRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ptr_records: Vec<PtrRecord>,
     #[doc = "An SOA record."]
     #[serde(rename = "soaRecord", default, skip_serializing_if = "Option::is_none")]
     pub soa_record: Option<SoaRecord>,
     #[doc = "The list of SRV records in the record set."]
-    #[serde(rename = "srvRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "srvRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub srv_records: Vec<SrvRecord>,
     #[doc = "The list of TXT records in the record set."]
-    #[serde(rename = "txtRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "txtRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub txt_records: Vec<TxtRecord>,
 }
 impl RecordSetProperties {
@@ -434,7 +476,11 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TxtRecord {
     #[doc = "The text value of this TXT record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl TxtRecord {
@@ -463,7 +509,11 @@ impl VirtualNetworkLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkLinkListResult {
     #[doc = "Information about the virtual network links to the Private DNS zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkLink>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/privatedns/src/package_2020_01/models.rs b/services/mgmt/privatedns/src/package_2020_01/models.rs
index 5c39dbe7ed..4fea395ba0 100644
--- a/services/mgmt/privatedns/src/package_2020_01/models.rs
+++ b/services/mgmt/privatedns/src/package_2020_01/models.rs
@@ -58,7 +58,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -114,7 +118,11 @@ impl PrivateZone {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateZoneListResult {
     #[doc = "Information about the Private DNS zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateZone>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -273,7 +281,11 @@ impl RecordSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecordSetListResult {
     #[doc = "Information about the record sets in the response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecordSet>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -306,28 +318,58 @@ pub struct RecordSetProperties {
     #[serde(rename = "isAutoRegistered", default, skip_serializing_if = "Option::is_none")]
     pub is_auto_registered: Option<bool>,
     #[doc = "The list of A records in the record set."]
-    #[serde(rename = "aRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub a_records: Vec<ARecord>,
     #[doc = "The list of AAAA records in the record set."]
-    #[serde(rename = "aaaaRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aaaaRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aaaa_records: Vec<AaaaRecord>,
     #[doc = "A CNAME record."]
     #[serde(rename = "cnameRecord", default, skip_serializing_if = "Option::is_none")]
     pub cname_record: Option<CnameRecord>,
     #[doc = "The list of MX records in the record set."]
-    #[serde(rename = "mxRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mxRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mx_records: Vec<MxRecord>,
     #[doc = "The list of PTR records in the record set."]
-    #[serde(rename = "ptrRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ptrRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ptr_records: Vec<PtrRecord>,
     #[doc = "An SOA record."]
     #[serde(rename = "soaRecord", default, skip_serializing_if = "Option::is_none")]
     pub soa_record: Option<SoaRecord>,
     #[doc = "The list of SRV records in the record set."]
-    #[serde(rename = "srvRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "srvRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub srv_records: Vec<SrvRecord>,
     #[doc = "The list of TXT records in the record set."]
-    #[serde(rename = "txtRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "txtRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub txt_records: Vec<TxtRecord>,
 }
 impl RecordSetProperties {
@@ -437,7 +479,11 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TxtRecord {
     #[doc = "The text value of this TXT record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl TxtRecord {
@@ -466,7 +512,11 @@ impl VirtualNetworkLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkLinkListResult {
     #[doc = "Information about the virtual network links to the Private DNS zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkLink>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/privatedns/src/package_2020_06/models.rs b/services/mgmt/privatedns/src/package_2020_06/models.rs
index 5c39dbe7ed..4fea395ba0 100644
--- a/services/mgmt/privatedns/src/package_2020_06/models.rs
+++ b/services/mgmt/privatedns/src/package_2020_06/models.rs
@@ -58,7 +58,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -114,7 +118,11 @@ impl PrivateZone {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateZoneListResult {
     #[doc = "Information about the Private DNS zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateZone>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -273,7 +281,11 @@ impl RecordSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecordSetListResult {
     #[doc = "Information about the record sets in the response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecordSet>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -306,28 +318,58 @@ pub struct RecordSetProperties {
     #[serde(rename = "isAutoRegistered", default, skip_serializing_if = "Option::is_none")]
     pub is_auto_registered: Option<bool>,
     #[doc = "The list of A records in the record set."]
-    #[serde(rename = "aRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub a_records: Vec<ARecord>,
     #[doc = "The list of AAAA records in the record set."]
-    #[serde(rename = "aaaaRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "aaaaRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aaaa_records: Vec<AaaaRecord>,
     #[doc = "A CNAME record."]
     #[serde(rename = "cnameRecord", default, skip_serializing_if = "Option::is_none")]
     pub cname_record: Option<CnameRecord>,
     #[doc = "The list of MX records in the record set."]
-    #[serde(rename = "mxRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mxRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mx_records: Vec<MxRecord>,
     #[doc = "The list of PTR records in the record set."]
-    #[serde(rename = "ptrRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ptrRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ptr_records: Vec<PtrRecord>,
     #[doc = "An SOA record."]
     #[serde(rename = "soaRecord", default, skip_serializing_if = "Option::is_none")]
     pub soa_record: Option<SoaRecord>,
     #[doc = "The list of SRV records in the record set."]
-    #[serde(rename = "srvRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "srvRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub srv_records: Vec<SrvRecord>,
     #[doc = "The list of TXT records in the record set."]
-    #[serde(rename = "txtRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "txtRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub txt_records: Vec<TxtRecord>,
 }
 impl RecordSetProperties {
@@ -437,7 +479,11 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TxtRecord {
     #[doc = "The text value of this TXT record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl TxtRecord {
@@ -466,7 +512,11 @@ impl VirtualNetworkLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkLinkListResult {
     #[doc = "Information about the virtual network links to the Private DNS zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkLink>,
     #[doc = "The continuation token for the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/providerhub/src/package_2020_11_20/models.rs b/services/mgmt/providerhub/src/package_2020_11_20/models.rs
index d715300a0d..356c4f1140 100644
--- a/services/mgmt/providerhub/src/package_2020_11_20/models.rs
+++ b/services/mgmt/providerhub/src/package_2020_11_20/models.rs
@@ -17,9 +17,18 @@ impl AuthorizationActionMapping {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CanaryTrafficRegionRolloutConfiguration {
-    #[serde(rename = "skipRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skipRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skip_regions: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<String>,
 }
 impl CanaryTrafficRegionRolloutConfiguration {
@@ -31,7 +40,12 @@ impl CanaryTrafficRegionRolloutConfiguration {
 pub struct CheckNameAvailabilitySpecifications {
     #[serde(rename = "enableDefaultValidation", default, skip_serializing_if = "Option::is_none")]
     pub enable_default_validation: Option<bool>,
-    #[serde(rename = "resourceTypesWithCustomValidation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypesWithCustomValidation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types_with_custom_validation: Vec<String>,
 }
 impl CheckNameAvailabilitySpecifications {
@@ -94,7 +108,11 @@ impl CustomRollout {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRolloutArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomRollout>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -194,7 +212,12 @@ pub struct CustomRolloutSpecification {
     pub canary: serde_json::Value,
     #[serde(rename = "providerRegistration", default, skip_serializing_if = "Option::is_none")]
     pub provider_registration: Option<serde_json::Value>,
-    #[serde(rename = "resourceTypeRegistrations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypeRegistrations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_type_registrations: Vec<ResourceTypeRegistration>,
 }
 impl CustomRolloutSpecification {
@@ -208,7 +231,12 @@ impl CustomRolloutSpecification {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRolloutStatus {
-    #[serde(rename = "completedRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "completedRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub completed_regions: Vec<String>,
     #[serde(rename = "failedOrSkippedRegions", default, skip_serializing_if = "Option::is_none")]
     pub failed_or_skipped_regions: Option<serde_json::Value>,
@@ -234,7 +262,11 @@ impl DefaultRollout {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DefaultRolloutArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DefaultRollout>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -342,7 +374,12 @@ pub struct DefaultRolloutSpecification {
     pub rest_of_the_world_group_two: Option<serde_json::Value>,
     #[serde(rename = "providerRegistration", default, skip_serializing_if = "Option::is_none")]
     pub provider_registration: Option<serde_json::Value>,
-    #[serde(rename = "resourceTypeRegistrations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypeRegistrations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_type_registrations: Vec<ResourceTypeRegistration>,
 }
 impl DefaultRolloutSpecification {
@@ -470,7 +507,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Array of details about specific errors that led to this reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "Object containing more specific information than  the current object about the error."]
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
@@ -507,9 +548,18 @@ pub struct ExtendedErrorInfo {
     pub target: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ExtendedErrorInfo>,
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<TypedErrorInfo>,
 }
 impl ExtendedErrorInfo {
@@ -531,9 +581,17 @@ impl ExtendedLocationOptions {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionOptions {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub response: Vec<String>,
 }
 impl ExtensionOptions {
@@ -852,9 +910,19 @@ pub mod linked_operation_rule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoggingHiddenPropertyPath {
-    #[serde(rename = "hiddenPathsOnRequest", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hiddenPathsOnRequest",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hidden_paths_on_request: Vec<String>,
-    #[serde(rename = "hiddenPathsOnResponse", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hiddenPathsOnResponse",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hidden_paths_on_response: Vec<String>,
 }
 impl LoggingHiddenPropertyPath {
@@ -962,7 +1030,11 @@ pub mod logging_rule {
 pub struct NotificationEndpoint {
     #[serde(rename = "notificationDestination", default, skip_serializing_if = "Option::is_none")]
     pub notification_destination: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl NotificationEndpoint {
@@ -985,7 +1057,11 @@ impl NotificationRegistration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationRegistrationArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotificationRegistration>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1008,9 +1084,19 @@ pub struct NotificationRegistrationProperties {
     pub notification_mode: Option<notification_registration_properties::NotificationMode>,
     #[serde(rename = "messageScope", default, skip_serializing_if = "Option::is_none")]
     pub message_scope: Option<notification_registration_properties::MessageScope>,
-    #[serde(rename = "includedEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_events: Vec<String>,
-    #[serde(rename = "notificationEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_endpoints: Vec<NotificationEndpoint>,
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<notification_registration_properties::ProvisioningState>,
@@ -1213,7 +1299,11 @@ pub mod operations_definition {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsDefinitionArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDefinition>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1258,7 +1348,12 @@ impl OperationsPutContent {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderHubMetadata {
-    #[serde(rename = "providerAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerAuthorizations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_authorizations: Vec<ResourceProviderAuthorization>,
     #[serde(rename = "providerAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub provider_authentication: Option<serde_json::Value>,
@@ -1284,7 +1379,11 @@ impl ProviderRegistration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderRegistrationArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderRegistration>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1525,7 +1624,12 @@ pub struct ResourceProviderCapabilities {
     #[serde(rename = "quotaId")]
     pub quota_id: String,
     pub effect: resource_provider_capabilities::Effect,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
 }
 impl ResourceProviderCapabilities {
@@ -1582,13 +1686,27 @@ pub mod resource_provider_capabilities {
 pub struct ResourceProviderEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[serde(rename = "endpointUri", default, skip_serializing_if = "Option::is_none")]
     pub endpoint_uri: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
@@ -1602,9 +1720,19 @@ impl ResourceProviderEndpoint {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderManagement {
-    #[serde(rename = "schemaOwners", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "schemaOwners",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schema_owners: Vec<String>,
-    #[serde(rename = "manifestOwners", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "manifestOwners",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manifest_owners: Vec<String>,
     #[serde(rename = "incidentRoutingService", default, skip_serializing_if = "Option::is_none")]
     pub incident_routing_service: Option<String>,
@@ -1612,11 +1740,21 @@ pub struct ResourceProviderManagement {
     pub incident_routing_team: Option<String>,
     #[serde(rename = "incidentContactEmail", default, skip_serializing_if = "Option::is_none")]
     pub incident_contact_email: Option<String>,
-    #[serde(rename = "serviceTreeInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceTreeInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_tree_infos: Vec<ServiceTreeInfo>,
     #[serde(rename = "resourceAccessPolicy", default, skip_serializing_if = "Option::is_none")]
     pub resource_access_policy: Option<resource_provider_management::ResourceAccessPolicy>,
-    #[serde(rename = "resourceAccessRoles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceAccessRoles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_access_roles: Vec<serde_json::Value>,
 }
 impl ResourceProviderManagement {
@@ -1637,7 +1775,12 @@ pub mod resource_provider_management {
 pub struct ResourceProviderManifest {
     #[serde(rename = "providerAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub provider_authentication: Option<serde_json::Value>,
-    #[serde(rename = "providerAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerAuthorizations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_authorizations: Vec<ResourceProviderAuthorization>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub namespace: Option<String>,
@@ -1645,21 +1788,40 @@ pub struct ResourceProviderManifest {
     pub provider_version: Option<String>,
     #[serde(rename = "providerType", default, skip_serializing_if = "Option::is_none")]
     pub provider_type: Option<resource_provider_manifest::ProviderType>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
     #[serde(rename = "requestHeaderOptions", default, skip_serializing_if = "Option::is_none")]
     pub request_header_options: Option<serde_json::Value>,
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<ResourceType>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub management: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceProviderCapabilities>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
-    #[serde(rename = "globalNotificationEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "globalNotificationEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub global_notification_endpoints: Vec<ResourceProviderEndpoint>,
     #[serde(rename = "reRegisterSubscriptionMetadata", default, skip_serializing_if = "Option::is_none")]
     pub re_register_subscription_metadata: Option<serde_json::Value>,
@@ -1724,7 +1886,12 @@ pub mod resource_provider_manifest {
 pub struct ResourceProviderManifestProperties {
     #[serde(rename = "providerAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub provider_authentication: Option<serde_json::Value>,
-    #[serde(rename = "providerAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerAuthorizations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_authorizations: Vec<ResourceProviderAuthorization>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub namespace: Option<String>,
@@ -1732,7 +1899,12 @@ pub struct ResourceProviderManifestProperties {
     pub provider_version: Option<String>,
     #[serde(rename = "providerType", default, skip_serializing_if = "Option::is_none")]
     pub provider_type: Option<resource_provider_manifest_properties::ProviderType>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
@@ -1740,7 +1912,11 @@ pub struct ResourceProviderManifestProperties {
     pub request_header_options: Option<serde_json::Value>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub management: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceProviderCapabilities>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
@@ -1811,19 +1987,48 @@ pub struct ResourceType {
     pub routing_type: Option<resource_type::RoutingType>,
     #[serde(rename = "resourceValidation", default, skip_serializing_if = "Option::is_none")]
     pub resource_validation: Option<resource_type::ResourceValidation>,
-    #[serde(rename = "allowedUnauthorizedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedUnauthorizedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_unauthorized_actions: Vec<String>,
-    #[serde(rename = "authorizationActionMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationActionMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_action_mappings: Vec<AuthorizationActionMapping>,
-    #[serde(rename = "linkedAccessChecks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedAccessChecks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_access_checks: Vec<LinkedAccessCheck>,
     #[serde(rename = "defaultApiVersion", default, skip_serializing_if = "Option::is_none")]
     pub default_api_version: Option<String>,
-    #[serde(rename = "loggingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loggingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logging_rules: Vec<LoggingRule>,
-    #[serde(rename = "throttlingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "throttlingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub throttling_rules: Vec<ThrottlingRule>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<ResourceProviderEndpoint>,
     #[serde(rename = "marketplaceType", default, skip_serializing_if = "Option::is_none")]
     pub marketplace_type: Option<resource_type::MarketplaceType>,
@@ -1831,25 +2036,55 @@ pub struct ResourceType {
     pub identity_management: Option<serde_json::Value>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
-    #[serde(rename = "subscriptionStateRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionStateRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_state_rules: Vec<SubscriptionStateRule>,
-    #[serde(rename = "serviceTreeInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceTreeInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_tree_infos: Vec<ServiceTreeInfo>,
     #[serde(rename = "requestHeaderOptions", default, skip_serializing_if = "Option::is_none")]
     pub request_header_options: Option<serde_json::Value>,
     #[serde(rename = "skuLink", default, skip_serializing_if = "Option::is_none")]
     pub sku_link: Option<String>,
-    #[serde(rename = "disallowedActionVerbs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disallowedActionVerbs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disallowed_action_verbs: Vec<String>,
     #[serde(rename = "templateDeploymentPolicy", default, skip_serializing_if = "Option::is_none")]
     pub template_deployment_policy: Option<serde_json::Value>,
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<ExtendedLocationOptions>,
-    #[serde(rename = "linkedOperationRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedOperationRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_operation_rules: Vec<LinkedOperationRule>,
     #[serde(rename = "resourceDeletionPolicy", default, skip_serializing_if = "Option::is_none")]
     pub resource_deletion_policy: Option<resource_type::ResourceDeletionPolicy>,
@@ -1999,15 +2234,33 @@ pub mod resource_type {
 pub struct ResourceTypeEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<ResourceTypeExtension>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub timeout: Option<String>,
@@ -2021,7 +2274,12 @@ impl ResourceTypeEndpoint {
 pub struct ResourceTypeExtension {
     #[serde(rename = "endpointUri", default, skip_serializing_if = "Option::is_none")]
     pub endpoint_uri: Option<String>,
-    #[serde(rename = "extensionCategories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extensionCategories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extension_categories: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub timeout: Option<String>,
@@ -2055,7 +2313,11 @@ impl ResourceTypeRegistration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceTypeRegistrationArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceTypeRegistration>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2078,27 +2340,66 @@ pub struct ResourceTypeRegistrationProperties {
     pub routing_type: Option<resource_type_registration_properties::RoutingType>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub regionality: Option<resource_type_registration_properties::Regionality>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<ResourceTypeEndpoint>,
     #[serde(rename = "extensionOptions", default, skip_serializing_if = "Option::is_none")]
     pub extension_options: Option<serde_json::Value>,
     #[serde(rename = "marketplaceType", default, skip_serializing_if = "Option::is_none")]
     pub marketplace_type: Option<resource_type_registration_properties::MarketplaceType>,
-    #[serde(rename = "swaggerSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "swaggerSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub swagger_specifications: Vec<SwaggerSpecification>,
-    #[serde(rename = "allowedUnauthorizedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedUnauthorizedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_unauthorized_actions: Vec<String>,
-    #[serde(rename = "authorizationActionMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationActionMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_action_mappings: Vec<AuthorizationActionMapping>,
-    #[serde(rename = "linkedAccessChecks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedAccessChecks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_access_checks: Vec<LinkedAccessCheck>,
     #[serde(rename = "defaultApiVersion", default, skip_serializing_if = "Option::is_none")]
     pub default_api_version: Option<String>,
-    #[serde(rename = "loggingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loggingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logging_rules: Vec<LoggingRule>,
-    #[serde(rename = "throttlingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "throttlingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub throttling_rules: Vec<ThrottlingRule>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
@@ -2120,17 +2421,37 @@ pub struct ResourceTypeRegistrationProperties {
     pub identity_management: Option<serde_json::Value>,
     #[serde(rename = "checkNameAvailabilitySpecifications", default, skip_serializing_if = "Option::is_none")]
     pub check_name_availability_specifications: Option<serde_json::Value>,
-    #[serde(rename = "disallowedActionVerbs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disallowedActionVerbs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disallowed_action_verbs: Vec<String>,
-    #[serde(rename = "serviceTreeInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceTreeInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_tree_infos: Vec<ServiceTreeInfo>,
     #[serde(rename = "requestHeaderOptions", default, skip_serializing_if = "Option::is_none")]
     pub request_header_options: Option<serde_json::Value>,
-    #[serde(rename = "subscriptionStateRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionStateRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_state_rules: Vec<SubscriptionStateRule>,
     #[serde(rename = "templateDeploymentOptions", default, skip_serializing_if = "Option::is_none")]
     pub template_deployment_options: Option<serde_json::Value>,
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<ExtendedLocationOptions>,
     #[serde(rename = "resourceMovePolicy", default, skip_serializing_if = "Option::is_none")]
     pub resource_move_policy: Option<serde_json::Value>,
@@ -2416,7 +2737,12 @@ pub mod resource_type_sku {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RolloutStatusBase {
-    #[serde(rename = "completedRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "completedRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub completed_regions: Vec<String>,
     #[serde(rename = "failedOrSkippedRegions", default, skip_serializing_if = "Option::is_none")]
     pub failed_or_skipped_regions: Option<serde_json::Value>,
@@ -2530,11 +2856,25 @@ impl SkuCost {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct SkuLocationInfo {
     pub location: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<SkuZoneDetail>,
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<String>,
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<sku_location_info::Type>,
@@ -2573,7 +2913,11 @@ impl SkuResource {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuResourceArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuResource>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2601,19 +2945,46 @@ pub struct SkuSetting {
     pub family: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kind: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfo>,
-    #[serde(rename = "requiredQuotaIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredQuotaIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_quota_ids: Vec<String>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl SkuSetting {
@@ -2636,9 +3007,17 @@ impl SkuSetting {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuZoneDetail {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl SkuZoneDetail {
@@ -2648,7 +3027,12 @@ impl SkuZoneDetail {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionLifecycleNotificationSpecifications {
-    #[serde(rename = "subscriptionStateOverrideActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionStateOverrideActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_state_override_actions: Vec<SubscriptionStateOverrideAction>,
     #[serde(rename = "softDeleteTTL", default, skip_serializing_if = "Option::is_none")]
     pub soft_delete_ttl: Option<String>,
@@ -2777,7 +3161,12 @@ pub mod subscription_state_override_action {
 pub struct SubscriptionStateRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<subscription_state_rule::State>,
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
 }
 impl SubscriptionStateRule {
@@ -2834,7 +3223,12 @@ pub mod subscription_state_rule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SwaggerSpecification {
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[serde(rename = "swaggerSpecFolderUri", default, skip_serializing_if = "Option::is_none")]
     pub swagger_spec_folder_uri: Option<String>,
@@ -2848,7 +3242,12 @@ impl SwaggerSpecification {
 pub struct TemplateDeploymentOptions {
     #[serde(rename = "preflightSupported", default, skip_serializing_if = "Option::is_none")]
     pub preflight_supported: Option<bool>,
-    #[serde(rename = "preflightOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preflightOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub preflight_options: Vec<String>,
 }
 impl TemplateDeploymentOptions {
@@ -2956,7 +3355,11 @@ pub mod template_deployment_policy {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ThirdPartyProviderAuthorization {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<LightHouseAuthorization>,
     #[serde(rename = "managedByTenantId", default, skip_serializing_if = "Option::is_none")]
     pub managed_by_tenant_id: Option<String>,
@@ -3028,7 +3431,12 @@ pub mod throttling_metric {
 pub struct ThrottlingRule {
     pub action: String,
     pub metrics: Vec<ThrottlingMetric>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
 }
 impl ThrottlingRule {
@@ -3054,7 +3462,11 @@ impl TrafficRegionRolloutConfiguration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrafficRegions {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<String>,
 }
 impl TrafficRegions {
diff --git a/services/mgmt/providerhub/src/package_2021_05_01_preview/models.rs b/services/mgmt/providerhub/src/package_2021_05_01_preview/models.rs
index bff5161efa..04592304cd 100644
--- a/services/mgmt/providerhub/src/package_2021_05_01_preview/models.rs
+++ b/services/mgmt/providerhub/src/package_2021_05_01_preview/models.rs
@@ -17,9 +17,18 @@ impl AuthorizationActionMapping {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CanaryTrafficRegionRolloutConfiguration {
-    #[serde(rename = "skipRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skipRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skip_regions: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<String>,
 }
 impl CanaryTrafficRegionRolloutConfiguration {
@@ -31,7 +40,12 @@ impl CanaryTrafficRegionRolloutConfiguration {
 pub struct CheckNameAvailabilitySpecifications {
     #[serde(rename = "enableDefaultValidation", default, skip_serializing_if = "Option::is_none")]
     pub enable_default_validation: Option<bool>,
-    #[serde(rename = "resourceTypesWithCustomValidation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypesWithCustomValidation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types_with_custom_validation: Vec<String>,
 }
 impl CheckNameAvailabilitySpecifications {
@@ -94,7 +108,11 @@ impl CustomRollout {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRolloutArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomRollout>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -133,7 +151,12 @@ pub struct CustomRolloutSpecification {
     pub canary: serde_json::Value,
     #[serde(rename = "providerRegistration", default, skip_serializing_if = "Option::is_none")]
     pub provider_registration: Option<serde_json::Value>,
-    #[serde(rename = "resourceTypeRegistrations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypeRegistrations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_type_registrations: Vec<ResourceTypeRegistration>,
 }
 impl CustomRolloutSpecification {
@@ -147,7 +170,12 @@ impl CustomRolloutSpecification {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRolloutStatus {
-    #[serde(rename = "completedRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "completedRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub completed_regions: Vec<String>,
     #[serde(rename = "failedOrSkippedRegions", default, skip_serializing_if = "Option::is_none")]
     pub failed_or_skipped_regions: Option<serde_json::Value>,
@@ -173,7 +201,11 @@ impl DefaultRollout {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DefaultRolloutArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DefaultRollout>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -222,7 +254,12 @@ pub struct DefaultRolloutSpecification {
     pub rest_of_the_world_group_two: Option<serde_json::Value>,
     #[serde(rename = "providerRegistration", default, skip_serializing_if = "Option::is_none")]
     pub provider_registration: Option<serde_json::Value>,
-    #[serde(rename = "resourceTypeRegistrations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypeRegistrations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_type_registrations: Vec<ResourceTypeRegistration>,
 }
 impl DefaultRolloutSpecification {
@@ -350,7 +387,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Array of details about specific errors that led to this reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "Object containing more specific information than  the current object about the error."]
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
@@ -399,9 +440,18 @@ pub struct ExtendedErrorInfo {
     pub target: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ExtendedErrorInfo>,
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<TypedErrorInfo>,
 }
 impl ExtendedErrorInfo {
@@ -423,9 +473,17 @@ impl ExtendedLocationOptions {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionOptions {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub response: Vec<String>,
 }
 impl ExtensionOptions {
@@ -744,9 +802,19 @@ pub mod linked_operation_rule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoggingHiddenPropertyPath {
-    #[serde(rename = "hiddenPathsOnRequest", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hiddenPathsOnRequest",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hidden_paths_on_request: Vec<String>,
-    #[serde(rename = "hiddenPathsOnResponse", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hiddenPathsOnResponse",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hidden_paths_on_response: Vec<String>,
 }
 impl LoggingHiddenPropertyPath {
@@ -854,7 +922,11 @@ pub mod logging_rule {
 pub struct NotificationEndpoint {
     #[serde(rename = "notificationDestination", default, skip_serializing_if = "Option::is_none")]
     pub notification_destination: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl NotificationEndpoint {
@@ -877,7 +949,11 @@ impl NotificationRegistration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationRegistrationArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotificationRegistration>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -900,9 +976,19 @@ pub struct NotificationRegistrationProperties {
     pub notification_mode: Option<notification_registration_properties::NotificationMode>,
     #[serde(rename = "messageScope", default, skip_serializing_if = "Option::is_none")]
     pub message_scope: Option<notification_registration_properties::MessageScope>,
-    #[serde(rename = "includedEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_events: Vec<String>,
-    #[serde(rename = "notificationEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_endpoints: Vec<NotificationEndpoint>,
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
@@ -1047,7 +1133,11 @@ pub mod operations_definition {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsDefinitionArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDefinition>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1092,7 +1182,12 @@ impl OperationsPutContent {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderHubMetadata {
-    #[serde(rename = "providerAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerAuthorizations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_authorizations: Vec<ResourceProviderAuthorization>,
     #[serde(rename = "providerAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub provider_authentication: Option<serde_json::Value>,
@@ -1118,7 +1213,11 @@ impl ProviderRegistration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderRegistrationArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderRegistration>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1411,7 +1510,12 @@ pub struct ResourceProviderCapabilities {
     #[serde(rename = "quotaId")]
     pub quota_id: String,
     pub effect: resource_provider_capabilities::Effect,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
 }
 impl ResourceProviderCapabilities {
@@ -1468,13 +1572,27 @@ pub mod resource_provider_capabilities {
 pub struct ResourceProviderEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[serde(rename = "endpointUri", default, skip_serializing_if = "Option::is_none")]
     pub endpoint_uri: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
@@ -1488,9 +1606,19 @@ impl ResourceProviderEndpoint {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderManagement {
-    #[serde(rename = "schemaOwners", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "schemaOwners",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schema_owners: Vec<String>,
-    #[serde(rename = "manifestOwners", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "manifestOwners",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manifest_owners: Vec<String>,
     #[serde(rename = "incidentRoutingService", default, skip_serializing_if = "Option::is_none")]
     pub incident_routing_service: Option<String>,
@@ -1498,11 +1626,21 @@ pub struct ResourceProviderManagement {
     pub incident_routing_team: Option<String>,
     #[serde(rename = "incidentContactEmail", default, skip_serializing_if = "Option::is_none")]
     pub incident_contact_email: Option<String>,
-    #[serde(rename = "serviceTreeInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceTreeInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_tree_infos: Vec<ServiceTreeInfo>,
     #[serde(rename = "resourceAccessPolicy", default, skip_serializing_if = "Option::is_none")]
     pub resource_access_policy: Option<resource_provider_management::ResourceAccessPolicy>,
-    #[serde(rename = "resourceAccessRoles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceAccessRoles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_access_roles: Vec<serde_json::Value>,
 }
 impl ResourceProviderManagement {
@@ -1523,7 +1661,12 @@ pub mod resource_provider_management {
 pub struct ResourceProviderManifest {
     #[serde(rename = "providerAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub provider_authentication: Option<serde_json::Value>,
-    #[serde(rename = "providerAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerAuthorizations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_authorizations: Vec<ResourceProviderAuthorization>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub namespace: Option<String>,
@@ -1531,21 +1674,40 @@ pub struct ResourceProviderManifest {
     pub provider_version: Option<String>,
     #[serde(rename = "providerType", default, skip_serializing_if = "Option::is_none")]
     pub provider_type: Option<resource_provider_manifest::ProviderType>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
     #[serde(rename = "requestHeaderOptions", default, skip_serializing_if = "Option::is_none")]
     pub request_header_options: Option<serde_json::Value>,
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<ResourceType>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub management: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceProviderCapabilities>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
-    #[serde(rename = "globalNotificationEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "globalNotificationEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub global_notification_endpoints: Vec<ResourceProviderEndpoint>,
     #[serde(rename = "reRegisterSubscriptionMetadata", default, skip_serializing_if = "Option::is_none")]
     pub re_register_subscription_metadata: Option<serde_json::Value>,
@@ -1610,7 +1772,12 @@ pub mod resource_provider_manifest {
 pub struct ResourceProviderManifestProperties {
     #[serde(rename = "providerAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub provider_authentication: Option<serde_json::Value>,
-    #[serde(rename = "providerAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerAuthorizations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_authorizations: Vec<ResourceProviderAuthorization>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub namespace: Option<String>,
@@ -1618,7 +1785,12 @@ pub struct ResourceProviderManifestProperties {
     pub provider_version: Option<String>,
     #[serde(rename = "providerType", default, skip_serializing_if = "Option::is_none")]
     pub provider_type: Option<resource_provider_manifest_properties::ProviderType>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
@@ -1626,7 +1798,11 @@ pub struct ResourceProviderManifestProperties {
     pub request_header_options: Option<serde_json::Value>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub management: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceProviderCapabilities>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
@@ -1695,19 +1871,48 @@ pub struct ResourceType {
     pub routing_type: Option<resource_type::RoutingType>,
     #[serde(rename = "resourceValidation", default, skip_serializing_if = "Option::is_none")]
     pub resource_validation: Option<resource_type::ResourceValidation>,
-    #[serde(rename = "allowedUnauthorizedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedUnauthorizedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_unauthorized_actions: Vec<String>,
-    #[serde(rename = "authorizationActionMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationActionMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_action_mappings: Vec<AuthorizationActionMapping>,
-    #[serde(rename = "linkedAccessChecks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedAccessChecks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_access_checks: Vec<LinkedAccessCheck>,
     #[serde(rename = "defaultApiVersion", default, skip_serializing_if = "Option::is_none")]
     pub default_api_version: Option<String>,
-    #[serde(rename = "loggingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loggingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logging_rules: Vec<LoggingRule>,
-    #[serde(rename = "throttlingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "throttlingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub throttling_rules: Vec<ThrottlingRule>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<ResourceProviderEndpoint>,
     #[serde(rename = "marketplaceType", default, skip_serializing_if = "Option::is_none")]
     pub marketplace_type: Option<resource_type::MarketplaceType>,
@@ -1715,25 +1920,55 @@ pub struct ResourceType {
     pub identity_management: Option<serde_json::Value>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
-    #[serde(rename = "subscriptionStateRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionStateRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_state_rules: Vec<SubscriptionStateRule>,
-    #[serde(rename = "serviceTreeInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceTreeInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_tree_infos: Vec<ServiceTreeInfo>,
     #[serde(rename = "requestHeaderOptions", default, skip_serializing_if = "Option::is_none")]
     pub request_header_options: Option<serde_json::Value>,
     #[serde(rename = "skuLink", default, skip_serializing_if = "Option::is_none")]
     pub sku_link: Option<String>,
-    #[serde(rename = "disallowedActionVerbs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disallowedActionVerbs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disallowed_action_verbs: Vec<String>,
     #[serde(rename = "templateDeploymentPolicy", default, skip_serializing_if = "Option::is_none")]
     pub template_deployment_policy: Option<serde_json::Value>,
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<ExtendedLocationOptions>,
-    #[serde(rename = "linkedOperationRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedOperationRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_operation_rules: Vec<LinkedOperationRule>,
     #[serde(rename = "resourceDeletionPolicy", default, skip_serializing_if = "Option::is_none")]
     pub resource_deletion_policy: Option<resource_type::ResourceDeletionPolicy>,
@@ -1883,15 +2118,33 @@ pub mod resource_type {
 pub struct ResourceTypeEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<ResourceTypeExtension>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub timeout: Option<String>,
@@ -1905,7 +2158,12 @@ impl ResourceTypeEndpoint {
 pub struct ResourceTypeExtension {
     #[serde(rename = "endpointUri", default, skip_serializing_if = "Option::is_none")]
     pub endpoint_uri: Option<String>,
-    #[serde(rename = "extensionCategories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extensionCategories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extension_categories: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub timeout: Option<String>,
@@ -1939,7 +2197,11 @@ impl ResourceTypeRegistration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceTypeRegistrationArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceTypeRegistration>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1962,27 +2224,66 @@ pub struct ResourceTypeRegistrationProperties {
     pub routing_type: Option<resource_type_registration_properties::RoutingType>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub regionality: Option<resource_type_registration_properties::Regionality>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<ResourceTypeEndpoint>,
     #[serde(rename = "extensionOptions", default, skip_serializing_if = "Option::is_none")]
     pub extension_options: Option<serde_json::Value>,
     #[serde(rename = "marketplaceType", default, skip_serializing_if = "Option::is_none")]
     pub marketplace_type: Option<resource_type_registration_properties::MarketplaceType>,
-    #[serde(rename = "swaggerSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "swaggerSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub swagger_specifications: Vec<SwaggerSpecification>,
-    #[serde(rename = "allowedUnauthorizedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedUnauthorizedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_unauthorized_actions: Vec<String>,
-    #[serde(rename = "authorizationActionMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationActionMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_action_mappings: Vec<AuthorizationActionMapping>,
-    #[serde(rename = "linkedAccessChecks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedAccessChecks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_access_checks: Vec<LinkedAccessCheck>,
     #[serde(rename = "defaultApiVersion", default, skip_serializing_if = "Option::is_none")]
     pub default_api_version: Option<String>,
-    #[serde(rename = "loggingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loggingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logging_rules: Vec<LoggingRule>,
-    #[serde(rename = "throttlingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "throttlingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub throttling_rules: Vec<ThrottlingRule>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
@@ -2004,17 +2305,37 @@ pub struct ResourceTypeRegistrationProperties {
     pub identity_management: Option<serde_json::Value>,
     #[serde(rename = "checkNameAvailabilitySpecifications", default, skip_serializing_if = "Option::is_none")]
     pub check_name_availability_specifications: Option<serde_json::Value>,
-    #[serde(rename = "disallowedActionVerbs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disallowedActionVerbs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disallowed_action_verbs: Vec<String>,
-    #[serde(rename = "serviceTreeInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceTreeInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_tree_infos: Vec<ServiceTreeInfo>,
     #[serde(rename = "requestHeaderOptions", default, skip_serializing_if = "Option::is_none")]
     pub request_header_options: Option<serde_json::Value>,
-    #[serde(rename = "subscriptionStateRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionStateRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_state_rules: Vec<SubscriptionStateRule>,
     #[serde(rename = "templateDeploymentOptions", default, skip_serializing_if = "Option::is_none")]
     pub template_deployment_options: Option<serde_json::Value>,
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<ExtendedLocationOptions>,
     #[serde(rename = "resourceMovePolicy", default, skip_serializing_if = "Option::is_none")]
     pub resource_move_policy: Option<serde_json::Value>,
@@ -2187,7 +2508,12 @@ impl ResourceTypeSku {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RolloutStatusBase {
-    #[serde(rename = "completedRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "completedRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub completed_regions: Vec<String>,
     #[serde(rename = "failedOrSkippedRegions", default, skip_serializing_if = "Option::is_none")]
     pub failed_or_skipped_regions: Option<serde_json::Value>,
@@ -2301,11 +2627,25 @@ impl SkuCost {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct SkuLocationInfo {
     pub location: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<SkuZoneDetail>,
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<String>,
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<sku_location_info::Type>,
@@ -2344,7 +2684,11 @@ impl SkuResource {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuResourceArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuResource>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2372,19 +2716,46 @@ pub struct SkuSetting {
     pub family: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kind: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfo>,
-    #[serde(rename = "requiredQuotaIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredQuotaIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_quota_ids: Vec<String>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl SkuSetting {
@@ -2407,9 +2778,17 @@ impl SkuSetting {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuZoneDetail {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl SkuZoneDetail {
@@ -2419,7 +2798,12 @@ impl SkuZoneDetail {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionLifecycleNotificationSpecifications {
-    #[serde(rename = "subscriptionStateOverrideActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionStateOverrideActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_state_override_actions: Vec<SubscriptionStateOverrideAction>,
     #[serde(rename = "softDeleteTTL", default, skip_serializing_if = "Option::is_none")]
     pub soft_delete_ttl: Option<String>,
@@ -2548,7 +2932,12 @@ pub mod subscription_state_override_action {
 pub struct SubscriptionStateRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<subscription_state_rule::State>,
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
 }
 impl SubscriptionStateRule {
@@ -2605,7 +2994,12 @@ pub mod subscription_state_rule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SwaggerSpecification {
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[serde(rename = "swaggerSpecFolderUri", default, skip_serializing_if = "Option::is_none")]
     pub swagger_spec_folder_uri: Option<String>,
@@ -2619,7 +3013,12 @@ impl SwaggerSpecification {
 pub struct TemplateDeploymentOptions {
     #[serde(rename = "preflightSupported", default, skip_serializing_if = "Option::is_none")]
     pub preflight_supported: Option<bool>,
-    #[serde(rename = "preflightOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preflightOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub preflight_options: Vec<String>,
 }
 impl TemplateDeploymentOptions {
@@ -2727,7 +3126,11 @@ pub mod template_deployment_policy {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ThirdPartyProviderAuthorization {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<LightHouseAuthorization>,
     #[serde(rename = "managedByTenantId", default, skip_serializing_if = "Option::is_none")]
     pub managed_by_tenant_id: Option<String>,
@@ -2799,7 +3202,12 @@ pub mod throttling_metric {
 pub struct ThrottlingRule {
     pub action: String,
     pub metrics: Vec<ThrottlingMetric>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
 }
 impl ThrottlingRule {
@@ -2825,7 +3233,11 @@ impl TrafficRegionRolloutConfiguration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrafficRegions {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<String>,
 }
 impl TrafficRegions {
diff --git a/services/mgmt/providerhub/src/package_2021_06_01_preview/models.rs b/services/mgmt/providerhub/src/package_2021_06_01_preview/models.rs
index ce31686442..ffd4f41c19 100644
--- a/services/mgmt/providerhub/src/package_2021_06_01_preview/models.rs
+++ b/services/mgmt/providerhub/src/package_2021_06_01_preview/models.rs
@@ -17,9 +17,18 @@ impl AuthorizationActionMapping {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CanaryTrafficRegionRolloutConfiguration {
-    #[serde(rename = "skipRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skipRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skip_regions: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<String>,
 }
 impl CanaryTrafficRegionRolloutConfiguration {
@@ -31,7 +40,12 @@ impl CanaryTrafficRegionRolloutConfiguration {
 pub struct CheckNameAvailabilitySpecifications {
     #[serde(rename = "enableDefaultValidation", default, skip_serializing_if = "Option::is_none")]
     pub enable_default_validation: Option<bool>,
-    #[serde(rename = "resourceTypesWithCustomValidation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypesWithCustomValidation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types_with_custom_validation: Vec<String>,
 }
 impl CheckNameAvailabilitySpecifications {
@@ -98,7 +112,11 @@ impl CustomRollout {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRolloutArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomRollout>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -137,7 +155,12 @@ pub struct CustomRolloutSpecification {
     pub canary: serde_json::Value,
     #[serde(rename = "providerRegistration", default, skip_serializing_if = "Option::is_none")]
     pub provider_registration: Option<serde_json::Value>,
-    #[serde(rename = "resourceTypeRegistrations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypeRegistrations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_type_registrations: Vec<ResourceTypeRegistration>,
 }
 impl CustomRolloutSpecification {
@@ -151,7 +174,12 @@ impl CustomRolloutSpecification {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRolloutStatus {
-    #[serde(rename = "completedRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "completedRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub completed_regions: Vec<String>,
     #[serde(rename = "failedOrSkippedRegions", default, skip_serializing_if = "Option::is_none")]
     pub failed_or_skipped_regions: Option<serde_json::Value>,
@@ -180,7 +208,11 @@ impl DefaultRollout {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DefaultRolloutArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DefaultRollout>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -229,7 +261,12 @@ pub struct DefaultRolloutSpecification {
     pub rest_of_the_world_group_two: Option<serde_json::Value>,
     #[serde(rename = "providerRegistration", default, skip_serializing_if = "Option::is_none")]
     pub provider_registration: Option<serde_json::Value>,
-    #[serde(rename = "resourceTypeRegistrations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypeRegistrations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_type_registrations: Vec<ResourceTypeRegistration>,
 }
 impl DefaultRolloutSpecification {
@@ -357,7 +394,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Array of details about specific errors that led to this reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "Object containing more specific information than  the current object about the error."]
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
@@ -406,9 +447,18 @@ pub struct ExtendedErrorInfo {
     pub target: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ExtendedErrorInfo>,
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<TypedErrorInfo>,
 }
 impl ExtendedErrorInfo {
@@ -430,9 +480,17 @@ impl ExtendedLocationOptions {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionOptions {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub response: Vec<String>,
 }
 impl ExtensionOptions {
@@ -873,9 +931,19 @@ impl LocalizedOperationDisplayDefinition {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoggingHiddenPropertyPath {
-    #[serde(rename = "hiddenPathsOnRequest", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hiddenPathsOnRequest",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hidden_paths_on_request: Vec<String>,
-    #[serde(rename = "hiddenPathsOnResponse", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hiddenPathsOnResponse",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hidden_paths_on_response: Vec<String>,
 }
 impl LoggingHiddenPropertyPath {
@@ -983,7 +1051,11 @@ pub mod logging_rule {
 pub struct NotificationEndpoint {
     #[serde(rename = "notificationDestination", default, skip_serializing_if = "Option::is_none")]
     pub notification_destination: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl NotificationEndpoint {
@@ -1009,7 +1081,11 @@ impl NotificationRegistration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationRegistrationArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotificationRegistration>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1032,9 +1108,19 @@ pub struct NotificationRegistrationProperties {
     pub notification_mode: Option<notification_registration_properties::NotificationMode>,
     #[serde(rename = "messageScope", default, skip_serializing_if = "Option::is_none")]
     pub message_scope: Option<notification_registration_properties::MessageScope>,
-    #[serde(rename = "includedEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_events: Vec<String>,
-    #[serde(rename = "notificationEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_endpoints: Vec<NotificationEndpoint>,
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
@@ -1158,7 +1244,11 @@ impl OperationsContent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsContentProperties {
     #[doc = "Operations content."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contents: Vec<LocalizedOperationDefinition>,
 }
 impl OperationsContentProperties {
@@ -1211,7 +1301,11 @@ pub mod operations_definition {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsDefinitionArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDefinition>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1259,7 +1353,12 @@ impl OperationsPutContent {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderHubMetadata {
-    #[serde(rename = "providerAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerAuthorizations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_authorizations: Vec<ResourceProviderAuthorization>,
     #[serde(rename = "providerAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub provider_authentication: Option<serde_json::Value>,
@@ -1288,7 +1387,11 @@ impl ProviderRegistration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderRegistrationArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderRegistration>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1547,7 +1650,11 @@ impl ResourceGraphConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceManagementAction {
     #[doc = "resource management action content."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<ResourceManagementEntity>,
 }
 impl ResourceManagementAction {
@@ -1623,7 +1730,12 @@ pub struct ResourceProviderCapabilities {
     #[serde(rename = "quotaId")]
     pub quota_id: String,
     pub effect: resource_provider_capabilities::Effect,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
 }
 impl ResourceProviderCapabilities {
@@ -1680,13 +1792,27 @@ pub mod resource_provider_capabilities {
 pub struct ResourceProviderEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[serde(rename = "endpointUri", default, skip_serializing_if = "Option::is_none")]
     pub endpoint_uri: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
@@ -1745,9 +1871,19 @@ pub mod resource_provider_endpoint {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderManagement {
-    #[serde(rename = "schemaOwners", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "schemaOwners",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schema_owners: Vec<String>,
-    #[serde(rename = "manifestOwners", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "manifestOwners",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manifest_owners: Vec<String>,
     #[serde(rename = "incidentRoutingService", default, skip_serializing_if = "Option::is_none")]
     pub incident_routing_service: Option<String>,
@@ -1755,11 +1891,21 @@ pub struct ResourceProviderManagement {
     pub incident_routing_team: Option<String>,
     #[serde(rename = "incidentContactEmail", default, skip_serializing_if = "Option::is_none")]
     pub incident_contact_email: Option<String>,
-    #[serde(rename = "serviceTreeInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceTreeInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_tree_infos: Vec<ServiceTreeInfo>,
     #[serde(rename = "resourceAccessPolicy", default, skip_serializing_if = "Option::is_none")]
     pub resource_access_policy: Option<resource_provider_management::ResourceAccessPolicy>,
-    #[serde(rename = "resourceAccessRoles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceAccessRoles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_access_roles: Vec<serde_json::Value>,
 }
 impl ResourceProviderManagement {
@@ -1780,7 +1926,12 @@ pub mod resource_provider_management {
 pub struct ResourceProviderManifest {
     #[serde(rename = "providerAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub provider_authentication: Option<serde_json::Value>,
-    #[serde(rename = "providerAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerAuthorizations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_authorizations: Vec<ResourceProviderAuthorization>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub namespace: Option<String>,
@@ -1788,21 +1939,40 @@ pub struct ResourceProviderManifest {
     pub provider_version: Option<String>,
     #[serde(rename = "providerType", default, skip_serializing_if = "Option::is_none")]
     pub provider_type: Option<resource_provider_manifest::ProviderType>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
     #[serde(rename = "requestHeaderOptions", default, skip_serializing_if = "Option::is_none")]
     pub request_header_options: Option<serde_json::Value>,
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<ResourceType>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub management: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceProviderCapabilities>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
-    #[serde(rename = "globalNotificationEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "globalNotificationEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub global_notification_endpoints: Vec<ResourceProviderEndpoint>,
     #[serde(rename = "reRegisterSubscriptionMetadata", default, skip_serializing_if = "Option::is_none")]
     pub re_register_subscription_metadata: Option<serde_json::Value>,
@@ -1867,7 +2037,12 @@ pub mod resource_provider_manifest {
 pub struct ResourceProviderManifestProperties {
     #[serde(rename = "providerAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub provider_authentication: Option<serde_json::Value>,
-    #[serde(rename = "providerAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerAuthorizations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_authorizations: Vec<ResourceProviderAuthorization>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub namespace: Option<String>,
@@ -1875,7 +2050,12 @@ pub struct ResourceProviderManifestProperties {
     pub provider_version: Option<String>,
     #[serde(rename = "providerType", default, skip_serializing_if = "Option::is_none")]
     pub provider_type: Option<resource_provider_manifest_properties::ProviderType>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
@@ -1883,7 +2063,11 @@ pub struct ResourceProviderManifestProperties {
     pub request_header_options: Option<serde_json::Value>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub management: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceProviderCapabilities>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
@@ -1954,19 +2138,48 @@ pub struct ResourceType {
     pub routing_type: Option<resource_type::RoutingType>,
     #[serde(rename = "resourceValidation", default, skip_serializing_if = "Option::is_none")]
     pub resource_validation: Option<resource_type::ResourceValidation>,
-    #[serde(rename = "allowedUnauthorizedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedUnauthorizedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_unauthorized_actions: Vec<String>,
-    #[serde(rename = "authorizationActionMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationActionMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_action_mappings: Vec<AuthorizationActionMapping>,
-    #[serde(rename = "linkedAccessChecks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedAccessChecks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_access_checks: Vec<LinkedAccessCheck>,
     #[serde(rename = "defaultApiVersion", default, skip_serializing_if = "Option::is_none")]
     pub default_api_version: Option<String>,
-    #[serde(rename = "loggingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loggingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logging_rules: Vec<LoggingRule>,
-    #[serde(rename = "throttlingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "throttlingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub throttling_rules: Vec<ThrottlingRule>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<ResourceProviderEndpoint>,
     #[serde(rename = "marketplaceType", default, skip_serializing_if = "Option::is_none")]
     pub marketplace_type: Option<resource_type::MarketplaceType>,
@@ -1974,25 +2187,55 @@ pub struct ResourceType {
     pub identity_management: Option<serde_json::Value>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
-    #[serde(rename = "subscriptionStateRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionStateRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_state_rules: Vec<SubscriptionStateRule>,
-    #[serde(rename = "serviceTreeInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceTreeInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_tree_infos: Vec<ServiceTreeInfo>,
     #[serde(rename = "requestHeaderOptions", default, skip_serializing_if = "Option::is_none")]
     pub request_header_options: Option<serde_json::Value>,
     #[serde(rename = "skuLink", default, skip_serializing_if = "Option::is_none")]
     pub sku_link: Option<String>,
-    #[serde(rename = "disallowedActionVerbs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disallowedActionVerbs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disallowed_action_verbs: Vec<String>,
     #[serde(rename = "templateDeploymentPolicy", default, skip_serializing_if = "Option::is_none")]
     pub template_deployment_policy: Option<serde_json::Value>,
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<ExtendedLocationOptions>,
-    #[serde(rename = "linkedOperationRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedOperationRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_operation_rules: Vec<LinkedOperationRule>,
     #[serde(rename = "resourceDeletionPolicy", default, skip_serializing_if = "Option::is_none")]
     pub resource_deletion_policy: Option<resource_type::ResourceDeletionPolicy>,
@@ -2142,15 +2385,33 @@ pub mod resource_type {
 pub struct ResourceTypeEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<ResourceTypeExtension>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub timeout: Option<String>,
@@ -2209,7 +2470,12 @@ pub mod resource_type_endpoint {
 pub struct ResourceTypeExtension {
     #[serde(rename = "endpointUri", default, skip_serializing_if = "Option::is_none")]
     pub endpoint_uri: Option<String>,
-    #[serde(rename = "extensionCategories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extensionCategories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extension_categories: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub timeout: Option<String>,
@@ -2246,7 +2512,11 @@ impl ResourceTypeRegistration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceTypeRegistrationArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceTypeRegistration>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2269,27 +2539,66 @@ pub struct ResourceTypeRegistrationProperties {
     pub routing_type: Option<resource_type_registration_properties::RoutingType>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub regionality: Option<resource_type_registration_properties::Regionality>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<ResourceTypeEndpoint>,
     #[serde(rename = "extensionOptions", default, skip_serializing_if = "Option::is_none")]
     pub extension_options: Option<serde_json::Value>,
     #[serde(rename = "marketplaceType", default, skip_serializing_if = "Option::is_none")]
     pub marketplace_type: Option<resource_type_registration_properties::MarketplaceType>,
-    #[serde(rename = "swaggerSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "swaggerSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub swagger_specifications: Vec<SwaggerSpecification>,
-    #[serde(rename = "allowedUnauthorizedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedUnauthorizedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_unauthorized_actions: Vec<String>,
-    #[serde(rename = "authorizationActionMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationActionMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_action_mappings: Vec<AuthorizationActionMapping>,
-    #[serde(rename = "linkedAccessChecks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedAccessChecks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_access_checks: Vec<LinkedAccessCheck>,
     #[serde(rename = "defaultApiVersion", default, skip_serializing_if = "Option::is_none")]
     pub default_api_version: Option<String>,
-    #[serde(rename = "loggingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loggingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logging_rules: Vec<LoggingRule>,
-    #[serde(rename = "throttlingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "throttlingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub throttling_rules: Vec<ThrottlingRule>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
@@ -2311,17 +2620,37 @@ pub struct ResourceTypeRegistrationProperties {
     pub identity_management: Option<serde_json::Value>,
     #[serde(rename = "checkNameAvailabilitySpecifications", default, skip_serializing_if = "Option::is_none")]
     pub check_name_availability_specifications: Option<serde_json::Value>,
-    #[serde(rename = "disallowedActionVerbs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disallowedActionVerbs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disallowed_action_verbs: Vec<String>,
-    #[serde(rename = "serviceTreeInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceTreeInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_tree_infos: Vec<ServiceTreeInfo>,
     #[serde(rename = "requestHeaderOptions", default, skip_serializing_if = "Option::is_none")]
     pub request_header_options: Option<serde_json::Value>,
-    #[serde(rename = "subscriptionStateRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionStateRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_state_rules: Vec<SubscriptionStateRule>,
     #[serde(rename = "templateDeploymentOptions", default, skip_serializing_if = "Option::is_none")]
     pub template_deployment_options: Option<serde_json::Value>,
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<ExtendedLocationOptions>,
     #[serde(rename = "resourceMovePolicy", default, skip_serializing_if = "Option::is_none")]
     pub resource_move_policy: Option<serde_json::Value>,
@@ -2496,7 +2825,12 @@ impl ResourceTypeSku {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RolloutStatusBase {
-    #[serde(rename = "completedRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "completedRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub completed_regions: Vec<String>,
     #[serde(rename = "failedOrSkippedRegions", default, skip_serializing_if = "Option::is_none")]
     pub failed_or_skipped_regions: Option<serde_json::Value>,
@@ -2610,11 +2944,25 @@ impl SkuCost {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct SkuLocationInfo {
     pub location: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<SkuZoneDetail>,
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<String>,
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<sku_location_info::Type>,
@@ -2656,7 +3004,11 @@ impl SkuResource {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuResourceArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuResource>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2684,19 +3036,46 @@ pub struct SkuSetting {
     pub family: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kind: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfo>,
-    #[serde(rename = "requiredQuotaIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredQuotaIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_quota_ids: Vec<String>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl SkuSetting {
@@ -2719,9 +3098,17 @@ impl SkuSetting {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuZoneDetail {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl SkuZoneDetail {
@@ -2731,7 +3118,12 @@ impl SkuZoneDetail {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionLifecycleNotificationSpecifications {
-    #[serde(rename = "subscriptionStateOverrideActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionStateOverrideActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_state_override_actions: Vec<SubscriptionStateOverrideAction>,
     #[serde(rename = "softDeleteTTL", default, skip_serializing_if = "Option::is_none")]
     pub soft_delete_ttl: Option<String>,
@@ -2860,7 +3252,12 @@ pub mod subscription_state_override_action {
 pub struct SubscriptionStateRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<subscription_state_rule::State>,
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
 }
 impl SubscriptionStateRule {
@@ -2917,7 +3314,12 @@ pub mod subscription_state_rule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SwaggerSpecification {
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[serde(rename = "swaggerSpecFolderUri", default, skip_serializing_if = "Option::is_none")]
     pub swagger_spec_folder_uri: Option<String>,
@@ -2931,7 +3333,12 @@ impl SwaggerSpecification {
 pub struct TemplateDeploymentOptions {
     #[serde(rename = "preflightSupported", default, skip_serializing_if = "Option::is_none")]
     pub preflight_supported: Option<bool>,
-    #[serde(rename = "preflightOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preflightOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub preflight_options: Vec<String>,
 }
 impl TemplateDeploymentOptions {
@@ -3039,7 +3446,11 @@ pub mod template_deployment_policy {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ThirdPartyProviderAuthorization {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<LightHouseAuthorization>,
     #[serde(rename = "managedByTenantId", default, skip_serializing_if = "Option::is_none")]
     pub managed_by_tenant_id: Option<String>,
@@ -3111,7 +3522,12 @@ pub mod throttling_metric {
 pub struct ThrottlingRule {
     pub action: String,
     pub metrics: Vec<ThrottlingMetric>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
 }
 impl ThrottlingRule {
@@ -3137,7 +3553,11 @@ impl TrafficRegionRolloutConfiguration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrafficRegions {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<String>,
 }
 impl TrafficRegions {
diff --git a/services/mgmt/providerhub/src/package_2021_09_01_preview/models.rs b/services/mgmt/providerhub/src/package_2021_09_01_preview/models.rs
index 9b56cd5fdd..4f531be013 100644
--- a/services/mgmt/providerhub/src/package_2021_09_01_preview/models.rs
+++ b/services/mgmt/providerhub/src/package_2021_09_01_preview/models.rs
@@ -17,9 +17,18 @@ impl AuthorizationActionMapping {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CanaryTrafficRegionRolloutConfiguration {
-    #[serde(rename = "skipRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skipRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skip_regions: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<String>,
 }
 impl CanaryTrafficRegionRolloutConfiguration {
@@ -31,7 +40,12 @@ impl CanaryTrafficRegionRolloutConfiguration {
 pub struct CheckNameAvailabilitySpecifications {
     #[serde(rename = "enableDefaultValidation", default, skip_serializing_if = "Option::is_none")]
     pub enable_default_validation: Option<bool>,
-    #[serde(rename = "resourceTypesWithCustomValidation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypesWithCustomValidation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types_with_custom_validation: Vec<String>,
 }
 impl CheckNameAvailabilitySpecifications {
@@ -98,7 +112,11 @@ impl CustomRollout {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRolloutArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomRollout>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -137,7 +155,12 @@ pub struct CustomRolloutSpecification {
     pub canary: serde_json::Value,
     #[serde(rename = "providerRegistration", default, skip_serializing_if = "Option::is_none")]
     pub provider_registration: Option<serde_json::Value>,
-    #[serde(rename = "resourceTypeRegistrations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypeRegistrations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_type_registrations: Vec<ResourceTypeRegistration>,
 }
 impl CustomRolloutSpecification {
@@ -151,7 +174,12 @@ impl CustomRolloutSpecification {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomRolloutStatus {
-    #[serde(rename = "completedRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "completedRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub completed_regions: Vec<String>,
     #[serde(rename = "failedOrSkippedRegions", default, skip_serializing_if = "Option::is_none")]
     pub failed_or_skipped_regions: Option<serde_json::Value>,
@@ -180,7 +208,11 @@ impl DefaultRollout {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DefaultRolloutArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DefaultRollout>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -229,7 +261,12 @@ pub struct DefaultRolloutSpecification {
     pub rest_of_the_world_group_two: Option<serde_json::Value>,
     #[serde(rename = "providerRegistration", default, skip_serializing_if = "Option::is_none")]
     pub provider_registration: Option<serde_json::Value>,
-    #[serde(rename = "resourceTypeRegistrations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypeRegistrations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_type_registrations: Vec<ResourceTypeRegistration>,
 }
 impl DefaultRolloutSpecification {
@@ -357,7 +394,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Array of details about specific errors that led to this reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "Object containing more specific information than  the current object about the error."]
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
@@ -406,9 +447,18 @@ pub struct ExtendedErrorInfo {
     pub target: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ExtendedErrorInfo>,
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<TypedErrorInfo>,
 }
 impl ExtendedErrorInfo {
@@ -430,9 +480,17 @@ impl ExtendedLocationOptions {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionOptions {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub response: Vec<String>,
 }
 impl ExtensionOptions {
@@ -873,9 +931,19 @@ impl LocalizedOperationDisplayDefinition {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoggingHiddenPropertyPath {
-    #[serde(rename = "hiddenPathsOnRequest", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hiddenPathsOnRequest",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hidden_paths_on_request: Vec<String>,
-    #[serde(rename = "hiddenPathsOnResponse", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hiddenPathsOnResponse",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hidden_paths_on_response: Vec<String>,
 }
 impl LoggingHiddenPropertyPath {
@@ -983,7 +1051,11 @@ pub mod logging_rule {
 pub struct NotificationEndpoint {
     #[serde(rename = "notificationDestination", default, skip_serializing_if = "Option::is_none")]
     pub notification_destination: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl NotificationEndpoint {
@@ -1009,7 +1081,11 @@ impl NotificationRegistration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationRegistrationArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotificationRegistration>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1032,9 +1108,19 @@ pub struct NotificationRegistrationProperties {
     pub notification_mode: Option<notification_registration_properties::NotificationMode>,
     #[serde(rename = "messageScope", default, skip_serializing_if = "Option::is_none")]
     pub message_scope: Option<notification_registration_properties::MessageScope>,
-    #[serde(rename = "includedEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_events: Vec<String>,
-    #[serde(rename = "notificationEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notificationEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notification_endpoints: Vec<NotificationEndpoint>,
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<ProvisioningState>,
@@ -1158,7 +1244,11 @@ impl OperationsContent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsContentProperties {
     #[doc = "Operations content."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contents: Vec<LocalizedOperationDefinition>,
 }
 impl OperationsContentProperties {
@@ -1211,7 +1301,11 @@ pub mod operations_definition {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsDefinitionArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDefinition>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1259,7 +1353,12 @@ impl OperationsPutContent {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderHubMetadata {
-    #[serde(rename = "providerAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerAuthorizations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_authorizations: Vec<ResourceProviderAuthorization>,
     #[serde(rename = "providerAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub provider_authentication: Option<serde_json::Value>,
@@ -1288,7 +1387,11 @@ impl ProviderRegistration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderRegistrationArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderRegistration>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1547,7 +1650,11 @@ impl ResourceGraphConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceManagementAction {
     #[doc = "resource management action content."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<ResourceManagementEntity>,
 }
 impl ResourceManagementAction {
@@ -1623,7 +1730,12 @@ pub struct ResourceProviderCapabilities {
     #[serde(rename = "quotaId")]
     pub quota_id: String,
     pub effect: resource_provider_capabilities::Effect,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
 }
 impl ResourceProviderCapabilities {
@@ -1680,13 +1792,27 @@ pub mod resource_provider_capabilities {
 pub struct ResourceProviderEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[serde(rename = "endpointUri", default, skip_serializing_if = "Option::is_none")]
     pub endpoint_uri: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
@@ -1745,9 +1871,19 @@ pub mod resource_provider_endpoint {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderManagement {
-    #[serde(rename = "schemaOwners", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "schemaOwners",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schema_owners: Vec<String>,
-    #[serde(rename = "manifestOwners", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "manifestOwners",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manifest_owners: Vec<String>,
     #[serde(rename = "incidentRoutingService", default, skip_serializing_if = "Option::is_none")]
     pub incident_routing_service: Option<String>,
@@ -1755,11 +1891,21 @@ pub struct ResourceProviderManagement {
     pub incident_routing_team: Option<String>,
     #[serde(rename = "incidentContactEmail", default, skip_serializing_if = "Option::is_none")]
     pub incident_contact_email: Option<String>,
-    #[serde(rename = "serviceTreeInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceTreeInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_tree_infos: Vec<ServiceTreeInfo>,
     #[serde(rename = "resourceAccessPolicy", default, skip_serializing_if = "Option::is_none")]
     pub resource_access_policy: Option<resource_provider_management::ResourceAccessPolicy>,
-    #[serde(rename = "resourceAccessRoles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceAccessRoles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_access_roles: Vec<serde_json::Value>,
 }
 impl ResourceProviderManagement {
@@ -1780,7 +1926,12 @@ pub mod resource_provider_management {
 pub struct ResourceProviderManifest {
     #[serde(rename = "providerAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub provider_authentication: Option<serde_json::Value>,
-    #[serde(rename = "providerAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerAuthorizations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_authorizations: Vec<ResourceProviderAuthorization>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub namespace: Option<String>,
@@ -1788,21 +1939,40 @@ pub struct ResourceProviderManifest {
     pub provider_version: Option<String>,
     #[serde(rename = "providerType", default, skip_serializing_if = "Option::is_none")]
     pub provider_type: Option<resource_provider_manifest::ProviderType>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
     #[serde(rename = "requestHeaderOptions", default, skip_serializing_if = "Option::is_none")]
     pub request_header_options: Option<serde_json::Value>,
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<ResourceType>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub management: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceProviderCapabilities>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
-    #[serde(rename = "globalNotificationEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "globalNotificationEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub global_notification_endpoints: Vec<ResourceProviderEndpoint>,
     #[serde(rename = "reRegisterSubscriptionMetadata", default, skip_serializing_if = "Option::is_none")]
     pub re_register_subscription_metadata: Option<serde_json::Value>,
@@ -1867,7 +2037,12 @@ pub mod resource_provider_manifest {
 pub struct ResourceProviderManifestProperties {
     #[serde(rename = "providerAuthentication", default, skip_serializing_if = "Option::is_none")]
     pub provider_authentication: Option<serde_json::Value>,
-    #[serde(rename = "providerAuthorizations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerAuthorizations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_authorizations: Vec<ResourceProviderAuthorization>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub namespace: Option<String>,
@@ -1875,7 +2050,12 @@ pub struct ResourceProviderManifestProperties {
     pub provider_version: Option<String>,
     #[serde(rename = "providerType", default, skip_serializing_if = "Option::is_none")]
     pub provider_type: Option<resource_provider_manifest_properties::ProviderType>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
@@ -1883,7 +2063,11 @@ pub struct ResourceProviderManifestProperties {
     pub request_header_options: Option<serde_json::Value>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub management: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceProviderCapabilities>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
@@ -1954,19 +2138,48 @@ pub struct ResourceType {
     pub routing_type: Option<resource_type::RoutingType>,
     #[serde(rename = "resourceValidation", default, skip_serializing_if = "Option::is_none")]
     pub resource_validation: Option<resource_type::ResourceValidation>,
-    #[serde(rename = "allowedUnauthorizedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedUnauthorizedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_unauthorized_actions: Vec<String>,
-    #[serde(rename = "authorizationActionMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationActionMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_action_mappings: Vec<AuthorizationActionMapping>,
-    #[serde(rename = "linkedAccessChecks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedAccessChecks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_access_checks: Vec<LinkedAccessCheck>,
     #[serde(rename = "defaultApiVersion", default, skip_serializing_if = "Option::is_none")]
     pub default_api_version: Option<String>,
-    #[serde(rename = "loggingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loggingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logging_rules: Vec<LoggingRule>,
-    #[serde(rename = "throttlingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "throttlingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub throttling_rules: Vec<ThrottlingRule>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<ResourceProviderEndpoint>,
     #[serde(rename = "marketplaceType", default, skip_serializing_if = "Option::is_none")]
     pub marketplace_type: Option<resource_type::MarketplaceType>,
@@ -1974,25 +2187,55 @@ pub struct ResourceType {
     pub identity_management: Option<serde_json::Value>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
-    #[serde(rename = "subscriptionStateRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionStateRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_state_rules: Vec<SubscriptionStateRule>,
-    #[serde(rename = "serviceTreeInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceTreeInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_tree_infos: Vec<ServiceTreeInfo>,
     #[serde(rename = "requestHeaderOptions", default, skip_serializing_if = "Option::is_none")]
     pub request_header_options: Option<serde_json::Value>,
     #[serde(rename = "skuLink", default, skip_serializing_if = "Option::is_none")]
     pub sku_link: Option<String>,
-    #[serde(rename = "disallowedActionVerbs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disallowedActionVerbs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disallowed_action_verbs: Vec<String>,
     #[serde(rename = "templateDeploymentPolicy", default, skip_serializing_if = "Option::is_none")]
     pub template_deployment_policy: Option<serde_json::Value>,
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<ExtendedLocationOptions>,
-    #[serde(rename = "linkedOperationRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedOperationRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_operation_rules: Vec<LinkedOperationRule>,
     #[serde(rename = "resourceDeletionPolicy", default, skip_serializing_if = "Option::is_none")]
     pub resource_deletion_policy: Option<resource_type::ResourceDeletionPolicy>,
@@ -2142,15 +2385,33 @@ pub mod resource_type {
 pub struct ResourceTypeEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<ResourceTypeExtension>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub timeout: Option<String>,
@@ -2209,7 +2470,12 @@ pub mod resource_type_endpoint {
 pub struct ResourceTypeExtension {
     #[serde(rename = "endpointUri", default, skip_serializing_if = "Option::is_none")]
     pub endpoint_uri: Option<String>,
-    #[serde(rename = "extensionCategories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extensionCategories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extension_categories: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub timeout: Option<String>,
@@ -2246,7 +2512,11 @@ impl ResourceTypeRegistration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceTypeRegistrationArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceTypeRegistration>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2269,27 +2539,66 @@ pub struct ResourceTypeRegistrationProperties {
     pub routing_type: Option<resource_type_registration_properties::RoutingType>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub regionality: Option<resource_type_registration_properties::Regionality>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<ResourceTypeEndpoint>,
     #[serde(rename = "extensionOptions", default, skip_serializing_if = "Option::is_none")]
     pub extension_options: Option<serde_json::Value>,
     #[serde(rename = "marketplaceType", default, skip_serializing_if = "Option::is_none")]
     pub marketplace_type: Option<resource_type_registration_properties::MarketplaceType>,
-    #[serde(rename = "swaggerSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "swaggerSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub swagger_specifications: Vec<SwaggerSpecification>,
-    #[serde(rename = "allowedUnauthorizedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedUnauthorizedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_unauthorized_actions: Vec<String>,
-    #[serde(rename = "authorizationActionMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "authorizationActionMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorization_action_mappings: Vec<AuthorizationActionMapping>,
-    #[serde(rename = "linkedAccessChecks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedAccessChecks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_access_checks: Vec<LinkedAccessCheck>,
     #[serde(rename = "defaultApiVersion", default, skip_serializing_if = "Option::is_none")]
     pub default_api_version: Option<String>,
-    #[serde(rename = "loggingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loggingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub logging_rules: Vec<LoggingRule>,
-    #[serde(rename = "throttlingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "throttlingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub throttling_rules: Vec<ThrottlingRule>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(rename = "featuresRule", default, skip_serializing_if = "Option::is_none")]
     pub features_rule: Option<serde_json::Value>,
@@ -2311,17 +2620,37 @@ pub struct ResourceTypeRegistrationProperties {
     pub identity_management: Option<serde_json::Value>,
     #[serde(rename = "checkNameAvailabilitySpecifications", default, skip_serializing_if = "Option::is_none")]
     pub check_name_availability_specifications: Option<serde_json::Value>,
-    #[serde(rename = "disallowedActionVerbs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disallowedActionVerbs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disallowed_action_verbs: Vec<String>,
-    #[serde(rename = "serviceTreeInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceTreeInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_tree_infos: Vec<ServiceTreeInfo>,
     #[serde(rename = "requestHeaderOptions", default, skip_serializing_if = "Option::is_none")]
     pub request_header_options: Option<serde_json::Value>,
-    #[serde(rename = "subscriptionStateRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionStateRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_state_rules: Vec<SubscriptionStateRule>,
     #[serde(rename = "templateDeploymentOptions", default, skip_serializing_if = "Option::is_none")]
     pub template_deployment_options: Option<serde_json::Value>,
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<ExtendedLocationOptions>,
     #[serde(rename = "resourceMovePolicy", default, skip_serializing_if = "Option::is_none")]
     pub resource_move_policy: Option<serde_json::Value>,
@@ -2496,7 +2825,12 @@ impl ResourceTypeSku {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RolloutStatusBase {
-    #[serde(rename = "completedRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "completedRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub completed_regions: Vec<String>,
     #[serde(rename = "failedOrSkippedRegions", default, skip_serializing_if = "Option::is_none")]
     pub failed_or_skipped_regions: Option<serde_json::Value>,
@@ -2667,11 +3001,25 @@ impl SkuCost {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct SkuLocationInfo {
     pub location: String,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<SkuZoneDetail>,
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<String>,
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<sku_location_info::Type>,
@@ -2713,7 +3061,11 @@ impl SkuResource {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuResourceArrayResponseWithContinuation {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuResource>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2741,19 +3093,46 @@ pub struct SkuSetting {
     pub family: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kind: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfo>,
-    #[serde(rename = "requiredQuotaIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredQuotaIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_quota_ids: Vec<String>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl SkuSetting {
@@ -2776,9 +3155,17 @@ impl SkuSetting {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuZoneDetail {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl SkuZoneDetail {
@@ -2788,7 +3175,12 @@ impl SkuZoneDetail {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionLifecycleNotificationSpecifications {
-    #[serde(rename = "subscriptionStateOverrideActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionStateOverrideActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_state_override_actions: Vec<SubscriptionStateOverrideAction>,
     #[serde(rename = "softDeleteTTL", default, skip_serializing_if = "Option::is_none")]
     pub soft_delete_ttl: Option<String>,
@@ -2917,7 +3309,12 @@ pub mod subscription_state_override_action {
 pub struct SubscriptionStateRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<subscription_state_rule::State>,
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
 }
 impl SubscriptionStateRule {
@@ -2974,7 +3371,12 @@ pub mod subscription_state_rule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SwaggerSpecification {
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[serde(rename = "swaggerSpecFolderUri", default, skip_serializing_if = "Option::is_none")]
     pub swagger_spec_folder_uri: Option<String>,
@@ -2988,7 +3390,12 @@ impl SwaggerSpecification {
 pub struct TemplateDeploymentOptions {
     #[serde(rename = "preflightSupported", default, skip_serializing_if = "Option::is_none")]
     pub preflight_supported: Option<bool>,
-    #[serde(rename = "preflightOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preflightOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub preflight_options: Vec<String>,
 }
 impl TemplateDeploymentOptions {
@@ -3096,7 +3503,11 @@ pub mod template_deployment_policy {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ThirdPartyProviderAuthorization {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<LightHouseAuthorization>,
     #[serde(rename = "managedByTenantId", default, skip_serializing_if = "Option::is_none")]
     pub managed_by_tenant_id: Option<String>,
@@ -3168,7 +3579,12 @@ pub mod throttling_metric {
 pub struct ThrottlingRule {
     pub action: String,
     pub metrics: Vec<ThrottlingMetric>,
-    #[serde(rename = "requiredFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_features: Vec<String>,
 }
 impl ThrottlingRule {
@@ -3194,7 +3610,11 @@ impl TrafficRegionRolloutConfiguration {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TrafficRegions {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<String>,
 }
 impl TrafficRegions {
diff --git a/services/mgmt/purview/src/package_2020_12_01_preview/models.rs b/services/mgmt/purview/src/package_2020_12_01_preview/models.rs
index 1c080d8da5..8a4be14834 100644
--- a/services/mgmt/purview/src/package_2020_12_01_preview/models.rs
+++ b/services/mgmt/purview/src/package_2020_12_01_preview/models.rs
@@ -107,7 +107,12 @@ pub struct AccountProperties {
     #[serde(rename = "managedResources", default, skip_serializing_if = "Option::is_none")]
     pub managed_resources: Option<serde_json::Value>,
     #[doc = "Gets the private endpoint connections information."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Gets or sets the state of the provisioning."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -466,7 +471,11 @@ pub struct ErrorModel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "Gets or sets the details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorModel>,
     #[doc = "Gets or sets the messages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -669,7 +678,11 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "properties for dimension"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<DimensionProperties>,
     #[doc = "description of the metric"]
     #[serde(rename = "displayDescription", default, skip_serializing_if = "Option::is_none")]
@@ -693,10 +706,20 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "units for the metric"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -711,10 +734,20 @@ impl OperationMetaMetricSpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationMetaServiceSpecification {
     #[doc = "log specifications for the operation"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationMetaLogSpecification>,
     #[doc = "metric specifications for the operation"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetaMetricSpecification>,
 }
 impl OperationMetaServiceSpecification {
@@ -860,10 +893,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "This translates to how many Private IPs should be created for each privately linkable resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The required zone names for private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
diff --git a/services/mgmt/purview/src/package_2021_07_01/models.rs b/services/mgmt/purview/src/package_2021_07_01/models.rs
index 13346c721a..0ffba9f68d 100644
--- a/services/mgmt/purview/src/package_2021_07_01/models.rs
+++ b/services/mgmt/purview/src/package_2021_07_01/models.rs
@@ -108,7 +108,12 @@ pub struct AccountProperties {
     #[serde(rename = "managedResources", default, skip_serializing_if = "Option::is_none")]
     pub managed_resources: Option<serde_json::Value>,
     #[doc = "Gets the private endpoint connections information."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Gets or sets the state of the provisioning."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -480,7 +485,11 @@ pub struct ErrorModel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "Gets or sets the details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorModel>,
     #[doc = "Gets or sets the messages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -690,7 +699,11 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "properties for dimension"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<DimensionProperties>,
     #[doc = "description of the metric"]
     #[serde(rename = "displayDescription", default, skip_serializing_if = "Option::is_none")]
@@ -714,10 +727,20 @@ pub struct OperationMetaMetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "units for the metric"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -732,10 +755,20 @@ impl OperationMetaMetricSpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationMetaServiceSpecification {
     #[doc = "log specifications for the operation"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationMetaLogSpecification>,
     #[doc = "metric specifications for the operation"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetaMetricSpecification>,
 }
 impl OperationMetaServiceSpecification {
@@ -881,10 +914,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "This translates to how many Private IPs should be created for each privately linkable resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The required zone names for private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
diff --git a/services/mgmt/quantum/src/package_2019_11_04_preview/models.rs b/services/mgmt/quantum/src/package_2019_11_04_preview/models.rs
index d077fd7a61..f793bff81d 100644
--- a/services/mgmt/quantum/src/package_2019_11_04_preview/models.rs
+++ b/services/mgmt/quantum/src/package_2019_11_04_preview/models.rs
@@ -64,10 +64,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -97,7 +106,11 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OfferingsListResult {
     #[doc = "Result of a list Providers operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderDescription>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Providers."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -259,16 +272,34 @@ pub struct ProviderProperties {
     #[serde(rename = "managedApplication", default, skip_serializing_if = "Option::is_none")]
     pub managed_application: Option<provider_properties::ManagedApplication>,
     #[doc = "The list of targets available from this provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<TargetDescription>,
     #[doc = "The list of skus available from this provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skus: Vec<SkuDescription>,
     #[doc = "The list of quota dimensions from the provider."]
-    #[serde(rename = "quotaDimensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "quotaDimensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub quota_dimensions: Vec<QuotaDimension>,
     #[doc = "The list of pricing dimensions from the provider."]
-    #[serde(rename = "pricingDimensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pricingDimensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pricing_dimensions: Vec<PricingDimension>,
 }
 impl ProviderProperties {
@@ -465,13 +496,27 @@ pub struct SkuDescription {
     #[serde(rename = "restrictedAccessUri", default, skip_serializing_if = "Option::is_none")]
     pub restricted_access_uri: Option<String>,
     #[doc = "The list of targets available for this sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<String>,
     #[doc = "The list of quota dimensions for this sku."]
-    #[serde(rename = "quotaDimensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "quotaDimensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub quota_dimensions: Vec<QuotaDimension>,
     #[doc = "The list of pricing details for the sku."]
-    #[serde(rename = "pricingDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pricingDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pricing_details: Vec<PricingDetail>,
 }
 impl SkuDescription {
@@ -504,10 +549,20 @@ pub struct TargetDescription {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of data formats accepted by this target."]
-    #[serde(rename = "acceptedDataFormats", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "acceptedDataFormats",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accepted_data_formats: Vec<String>,
     #[doc = "List of content encodings accepted by this target."]
-    #[serde(rename = "acceptedContentEncodings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "acceptedContentEncodings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accepted_content_encodings: Vec<String>,
 }
 impl TargetDescription {
@@ -539,7 +594,11 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "Result of a list Workspaces operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuantumWorkspace>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Workspaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -560,7 +619,11 @@ impl WorkspaceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceResourceProperties {
     #[doc = "List of Providers selected for this Workspace"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub providers: Vec<Provider>,
     #[doc = "Whether the current workspace is ready to accept Jobs."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/quantum/src/package_2022_01_10_preview/models.rs b/services/mgmt/quantum/src/package_2022_01_10_preview/models.rs
index 1521d3fc46..45f5ee3c77 100644
--- a/services/mgmt/quantum/src/package_2022_01_10_preview/models.rs
+++ b/services/mgmt/quantum/src/package_2022_01_10_preview/models.rs
@@ -64,10 +64,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -97,7 +106,11 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OfferingsListResult {
     #[doc = "Result of a list Providers operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderDescription>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Providers."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -259,16 +272,34 @@ pub struct ProviderProperties {
     #[serde(rename = "managedApplication", default, skip_serializing_if = "Option::is_none")]
     pub managed_application: Option<provider_properties::ManagedApplication>,
     #[doc = "The list of targets available from this provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<TargetDescription>,
     #[doc = "The list of skus available from this provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skus: Vec<SkuDescription>,
     #[doc = "The list of quota dimensions from the provider."]
-    #[serde(rename = "quotaDimensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "quotaDimensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub quota_dimensions: Vec<QuotaDimension>,
     #[doc = "The list of pricing dimensions from the provider."]
-    #[serde(rename = "pricingDimensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pricingDimensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pricing_dimensions: Vec<PricingDimension>,
 }
 impl ProviderProperties {
@@ -468,13 +499,27 @@ pub struct SkuDescription {
     #[serde(rename = "autoAdd", default, skip_serializing_if = "Option::is_none")]
     pub auto_add: Option<bool>,
     #[doc = "The list of targets available for this sku."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<String>,
     #[doc = "The list of quota dimensions for this sku."]
-    #[serde(rename = "quotaDimensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "quotaDimensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub quota_dimensions: Vec<QuotaDimension>,
     #[doc = "The list of pricing details for the sku."]
-    #[serde(rename = "pricingDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pricingDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pricing_details: Vec<PricingDetail>,
 }
 impl SkuDescription {
@@ -507,10 +552,20 @@ pub struct TargetDescription {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of data formats accepted by this target."]
-    #[serde(rename = "acceptedDataFormats", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "acceptedDataFormats",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accepted_data_formats: Vec<String>,
     #[doc = "List of content encodings accepted by this target."]
-    #[serde(rename = "acceptedContentEncodings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "acceptedContentEncodings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accepted_content_encodings: Vec<String>,
 }
 impl TargetDescription {
@@ -542,7 +597,11 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceListResult {
     #[doc = "Result of a list Workspaces operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuantumWorkspace>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Workspaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -563,7 +622,11 @@ impl WorkspaceListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkspaceResourceProperties {
     #[doc = "List of Providers selected for this Workspace"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub providers: Vec<Provider>,
     #[doc = "Whether the current workspace is ready to accept Jobs."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/quota/src/package_2021_03_15/models.rs b/services/mgmt/quota/src/package_2021_03_15/models.rs
index 2b67ecfd24..7c10efca32 100644
--- a/services/mgmt/quota/src/package_2021_03_15/models.rs
+++ b/services/mgmt/quota/src/package_2021_03_15/models.rs
@@ -25,7 +25,11 @@ impl CommonResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CreateGenericQuotaRequestParameters {
     #[doc = "Quota change requests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimitBase>,
 }
 impl CreateGenericQuotaRequestParameters {
@@ -94,7 +98,11 @@ impl OperationDisplay {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResponse>,
     #[doc = "URL to get the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -129,7 +137,11 @@ impl OperationResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaLimits {
     #[doc = "List of quota limits."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimitBase>,
     #[doc = "The URI used to fetch the next page of quota limits. When there are no more pages, this is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -150,7 +162,11 @@ impl QuotaLimits {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaLimitsResponse {
     #[doc = "List of quota limits with the quota request status."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimitBase>,
     #[doc = "The URI used to fetch the next page of quota limits. When there are no more pages, this is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -219,7 +235,11 @@ impl QuotaRequestDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaRequestDetailsList {
     #[doc = "Quota request details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaRequestDetails>,
     #[doc = "The URI for fetching the next page of quota limits. When there are no more pages, this is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -270,7 +290,11 @@ pub struct QuotaRequestProperties {
     #[serde(rename = "requestSubmitTime", default, with = "azure_core::date::rfc3339::option")]
     pub request_submit_time: Option<time::OffsetDateTime>,
     #[doc = "Quota request details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubRequest>,
 }
 impl QuotaRequestProperties {
@@ -418,7 +442,11 @@ impl QuotaTemplateDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaTemplatesDetails {
     #[doc = "Quota templates information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaTemplateDetails>,
 }
 impl QuotaTemplatesDetails {
@@ -451,7 +479,11 @@ pub struct QuotaTypeInformationDimensionList {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "Quota type information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaTypeDimensionInformation>,
 }
 impl QuotaTypeInformationDimensionList {
@@ -517,7 +549,11 @@ pub struct ResourceProviderTemplate {
     #[serde(rename = "resourceUsagesQuery", default, skip_serializing_if = "Option::is_none")]
     pub resource_usages_query: Option<ResourceQueryDetails>,
     #[doc = "Resource provider dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<ResourceProviderDimension>,
 }
 impl ResourceProviderTemplate {
@@ -529,7 +565,11 @@ impl ResourceProviderTemplate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderTemplates {
     #[doc = "The resource provider templates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderTemplate>,
 }
 impl ResourceProviderTemplates {
@@ -673,7 +713,11 @@ pub struct ServiceError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "List of error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ServiceErrorDetail>,
 }
 impl ServiceError {
@@ -787,7 +831,11 @@ impl QuotaRequestOneResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProvidersList {
     #[doc = "Resource provider information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderInformation>,
 }
 impl ResourceProvidersList {
diff --git a/services/mgmt/quota/src/package_2021_03_15_preview/models.rs b/services/mgmt/quota/src/package_2021_03_15_preview/models.rs
index 97d27d1b23..d188731212 100644
--- a/services/mgmt/quota/src/package_2021_03_15_preview/models.rs
+++ b/services/mgmt/quota/src/package_2021_03_15_preview/models.rs
@@ -25,7 +25,11 @@ impl CommonResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CreateGenericQuotaRequestParameters {
     #[doc = "Quota change requests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimitBase>,
 }
 impl CreateGenericQuotaRequestParameters {
@@ -219,7 +223,11 @@ impl OperationDisplay {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResponse>,
     #[doc = "URL to get the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -254,7 +262,11 @@ impl OperationResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaLimits {
     #[doc = "List of quota limits."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimitBase>,
     #[doc = "The URI used to fetch the next page of quota limits. When there are no more pages, this string is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -275,7 +287,11 @@ impl QuotaLimits {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaLimitsResponse {
     #[doc = "List of quota limits with the quota request status."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimitBase>,
     #[doc = "The URI used to fetch the next page of quota limits. When there are no more pages, this is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -341,7 +357,11 @@ impl QuotaRequestDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaRequestDetailsList {
     #[doc = "Quota request details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaRequestDetails>,
     #[doc = "The URI for fetching the next page of quota limits. When there are no more pages, this string is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -395,7 +415,11 @@ pub struct QuotaRequestProperties {
     #[serde(rename = "requestSubmitTime", default, with = "azure_core::date::rfc3339::option")]
     pub request_submit_time: Option<time::OffsetDateTime>,
     #[doc = "Quota request details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubRequest>,
 }
 impl QuotaRequestProperties {
@@ -547,7 +571,11 @@ pub struct ServiceError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "List of error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ServiceErrorDetail>,
 }
 impl ServiceError {
@@ -604,7 +632,11 @@ impl SubRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsagesLimits {
     #[doc = "List of quota limits."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentUsagesBase>,
     #[doc = "The URI used to fetch the next page of quota limits. When there are no more pages, this is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/recommendationsservice/src/package_2022_02_01/models.rs b/services/mgmt/recommendationsservice/src/package_2022_02_01/models.rs
index e923139072..14bbdccc2b 100644
--- a/services/mgmt/recommendationsservice/src/package_2022_02_01/models.rs
+++ b/services/mgmt/recommendationsservice/src/package_2022_02_01/models.rs
@@ -134,7 +134,11 @@ pub struct AccountResourceList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of RecommendationsService Account resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccountResource>,
 }
 impl azure_core::Continuable for AccountResourceList {
@@ -152,7 +156,12 @@ impl AccountResourceList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountStatus {
     #[doc = "The list of scopes statuses."]
-    #[serde(rename = "scopesStatuses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scopesStatuses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes_statuses: Vec<ScopeStatuses>,
 }
 impl AccountStatus {
@@ -240,13 +249,28 @@ pub struct CorsRule {
     #[serde(rename = "allowedOrigins")]
     pub allowed_origins: Vec<String>,
     #[doc = "The methods (HTTP request verbs) that the origin domain may use for a CORS request."]
-    #[serde(rename = "allowedMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_methods: Vec<String>,
     #[doc = "The request headers that the origin domain may specify on the CORS request."]
-    #[serde(rename = "allowedHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_headers: Vec<String>,
     #[doc = "The response headers to expose to CORS clients."]
-    #[serde(rename = "exposedHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exposedHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exposed_headers: Vec<String>,
     #[doc = "The number of seconds that the client/browser should cache a preflight response."]
     #[serde(rename = "maxAgeInSeconds", default, skip_serializing_if = "Option::is_none")]
@@ -351,10 +375,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -597,7 +630,11 @@ pub struct ModelingResourceList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Modeling resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ModelingResource>,
 }
 impl azure_core::Continuable for ModelingResourceList {
@@ -740,7 +777,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -778,7 +819,11 @@ pub struct OperationStatusResult {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The operations list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<OperationStatusResult>,
     #[doc = "The error detail."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -823,7 +868,11 @@ pub struct ScopeStatuses {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scope: Option<String>,
     #[doc = "Scope stage statuses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<StageStatus>,
 }
 impl ScopeStatuses {
@@ -895,7 +944,11 @@ pub struct ServiceEndpointResourceList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of ServiceEndpoint resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceEndpointResource>,
 }
 impl azure_core::Continuable for ServiceEndpointResourceList {
diff --git a/services/mgmt/recommendationsservice/src/package_2022_03_01_preview/models.rs b/services/mgmt/recommendationsservice/src/package_2022_03_01_preview/models.rs
index 57205380af..a230c4b8e7 100644
--- a/services/mgmt/recommendationsservice/src/package_2022_03_01_preview/models.rs
+++ b/services/mgmt/recommendationsservice/src/package_2022_03_01_preview/models.rs
@@ -141,7 +141,11 @@ pub struct AccountResourceList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of RecommendationsService Account resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccountResource>,
 }
 impl azure_core::Continuable for AccountResourceList {
@@ -159,7 +163,12 @@ impl AccountResourceList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountStatus {
     #[doc = "The list of scopes statuses."]
-    #[serde(rename = "scopesStatuses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scopesStatuses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes_statuses: Vec<ScopeStatuses>,
 }
 impl AccountStatus {
@@ -247,13 +256,28 @@ pub struct CorsRule {
     #[serde(rename = "allowedOrigins")]
     pub allowed_origins: Vec<String>,
     #[doc = "The methods (HTTP request verbs) that the origin domain may use for a CORS request."]
-    #[serde(rename = "allowedMethods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedMethods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_methods: Vec<String>,
     #[doc = "The request headers that the origin domain may specify on the CORS request."]
-    #[serde(rename = "allowedHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_headers: Vec<String>,
     #[doc = "The response headers to expose to CORS clients."]
-    #[serde(rename = "exposedHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exposedHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exposed_headers: Vec<String>,
     #[doc = "The number of seconds that the client/browser should cache a preflight response."]
     #[serde(rename = "maxAgeInSeconds", default, skip_serializing_if = "Option::is_none")]
@@ -358,10 +382,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -674,7 +707,11 @@ pub struct ModelingResourceList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Modeling resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ModelingResource>,
 }
 impl azure_core::Continuable for ModelingResourceList {
@@ -817,7 +854,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -855,7 +896,11 @@ pub struct OperationStatusResult {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The operations list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<OperationStatusResult>,
     #[doc = "The error detail."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -900,7 +945,11 @@ pub struct ScopeStatuses {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scope: Option<String>,
     #[doc = "Scope stage statuses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<StageStatus>,
 }
 impl ScopeStatuses {
@@ -972,7 +1021,11 @@ pub struct ServiceEndpointResourceList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of ServiceEndpoint resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceEndpointResource>,
 }
 impl azure_core::Continuable for ServiceEndpointResourceList {
diff --git a/services/mgmt/recoveryservices/src/package_2022_02/models.rs b/services/mgmt/recoveryservices/src/package_2022_02/models.rs
index 8918d134cd..84566054f2 100644
--- a/services/mgmt/recoveryservices/src/package_2022_02/models.rs
+++ b/services/mgmt/recoveryservices/src/package_2022_02/models.rs
@@ -100,7 +100,12 @@ impl ClientDiscoveryForProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryForServiceSpecification {
     #[doc = "List of log specifications of this operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<ClientDiscoveryForLogSpecification>,
 }
 impl ClientDiscoveryForServiceSpecification {
@@ -112,7 +117,11 @@ impl ClientDiscoveryForServiceSpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryResponse {
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientDiscoveryValueForSingleApi>,
     #[doc = "Link to the next chunk of the response"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -199,13 +208,22 @@ impl CmkKeyVaultProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Error {
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
     #[doc = "The error code."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "The error message."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -555,10 +573,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "[backup-ecs1, backup-prot1, backup-prot1b, backup-prot1c, backup-id1]"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -570,7 +598,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResources {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to the next chunk of the response"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -743,7 +775,11 @@ impl ReplicationUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationUsageList {
     #[doc = "The list of replication usages for the given vault."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationUsage>,
 }
 impl azure_core::Continuable for ReplicationUsageList {
@@ -1208,7 +1244,11 @@ impl VaultExtendedInfoResource {
 #[doc = "The response model for a list of Vaults."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vault>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1234,7 +1274,12 @@ pub struct VaultProperties {
     #[serde(rename = "upgradeDetails", default, skip_serializing_if = "Option::is_none")]
     pub upgrade_details: Option<UpgradeDetails>,
     #[doc = "List of private endpoint connection."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionVaultProperties>,
     #[doc = "Private endpoint state for backup."]
     #[serde(rename = "privateEndpointStateForBackup", default, skip_serializing_if = "Option::is_none")]
@@ -1590,7 +1635,11 @@ pub mod vault_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultUsageList {
     #[doc = "The list of usages for the given vault."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VaultUsage>,
 }
 impl azure_core::Continuable for VaultUsageList {
diff --git a/services/mgmt/recoveryservices/src/package_2022_03/models.rs b/services/mgmt/recoveryservices/src/package_2022_03/models.rs
index 83dd57e725..e3edd6fce0 100644
--- a/services/mgmt/recoveryservices/src/package_2022_03/models.rs
+++ b/services/mgmt/recoveryservices/src/package_2022_03/models.rs
@@ -200,7 +200,12 @@ impl ClientDiscoveryForProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryForServiceSpecification {
     #[doc = "List of log specifications of this operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<ClientDiscoveryForLogSpecification>,
 }
 impl ClientDiscoveryForServiceSpecification {
@@ -212,7 +217,11 @@ impl ClientDiscoveryForServiceSpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryResponse {
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientDiscoveryValueForSingleApi>,
     #[doc = "Link to the next chunk of the response"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -299,13 +308,22 @@ impl CmkKeyVaultProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Error {
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
     #[doc = "The error code."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "The error message."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -670,10 +688,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "[backup-ecs1, backup-prot1, backup-prot1b, backup-prot1c, backup-id1]"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -685,7 +713,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResources {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to the next chunk of the response"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -858,7 +890,11 @@ impl ReplicationUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationUsageList {
     #[doc = "The list of replication usages for the given vault."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationUsage>,
 }
 impl azure_core::Continuable for ReplicationUsageList {
@@ -1323,7 +1359,11 @@ impl VaultExtendedInfoResource {
 #[doc = "The response model for a list of Vaults."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vault>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1349,7 +1389,12 @@ pub struct VaultProperties {
     #[serde(rename = "upgradeDetails", default, skip_serializing_if = "Option::is_none")]
     pub upgrade_details: Option<UpgradeDetails>,
     #[doc = "List of private endpoint connection."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionVaultProperties>,
     #[doc = "Private endpoint state for backup."]
     #[serde(rename = "privateEndpointStateForBackup", default, skip_serializing_if = "Option::is_none")]
@@ -1708,7 +1753,11 @@ pub mod vault_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultUsageList {
     #[doc = "The list of usages for the given vault."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VaultUsage>,
 }
 impl azure_core::Continuable for VaultUsageList {
diff --git a/services/mgmt/recoveryservices/src/package_2022_04/models.rs b/services/mgmt/recoveryservices/src/package_2022_04/models.rs
index be99629fb2..6bd0979200 100644
--- a/services/mgmt/recoveryservices/src/package_2022_04/models.rs
+++ b/services/mgmt/recoveryservices/src/package_2022_04/models.rs
@@ -200,7 +200,12 @@ impl ClientDiscoveryForProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryForServiceSpecification {
     #[doc = "List of log specifications of this operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<ClientDiscoveryForLogSpecification>,
 }
 impl ClientDiscoveryForServiceSpecification {
@@ -212,7 +217,11 @@ impl ClientDiscoveryForServiceSpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryResponse {
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientDiscoveryValueForSingleApi>,
     #[doc = "Link to the next chunk of the response"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -299,13 +308,22 @@ impl CmkKeyVaultProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Error {
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
     #[doc = "The error code."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "The error message."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -670,10 +688,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "[backup-ecs1, backup-prot1, backup-prot1b, backup-prot1c, backup-id1]"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -685,7 +713,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResources {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to the next chunk of the response"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -858,7 +890,11 @@ impl ReplicationUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationUsageList {
     #[doc = "The list of replication usages for the given vault."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationUsage>,
 }
 impl azure_core::Continuable for ReplicationUsageList {
@@ -1327,7 +1363,11 @@ impl VaultExtendedInfoResource {
 #[doc = "The response model for a list of Vaults."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vault>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1353,7 +1393,12 @@ pub struct VaultProperties {
     #[serde(rename = "upgradeDetails", default, skip_serializing_if = "Option::is_none")]
     pub upgrade_details: Option<UpgradeDetails>,
     #[doc = "List of private endpoint connection."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionVaultProperties>,
     #[doc = "Private endpoint state for backup."]
     #[serde(rename = "privateEndpointStateForBackup", default, skip_serializing_if = "Option::is_none")]
@@ -1809,7 +1854,11 @@ pub mod vault_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultUsageList {
     #[doc = "The list of usages for the given vault."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VaultUsage>,
 }
 impl azure_core::Continuable for VaultUsageList {
diff --git a/services/mgmt/recoveryservices/src/package_preview_2021_11/models.rs b/services/mgmt/recoveryservices/src/package_preview_2021_11/models.rs
index 8918d134cd..84566054f2 100644
--- a/services/mgmt/recoveryservices/src/package_preview_2021_11/models.rs
+++ b/services/mgmt/recoveryservices/src/package_preview_2021_11/models.rs
@@ -100,7 +100,12 @@ impl ClientDiscoveryForProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryForServiceSpecification {
     #[doc = "List of log specifications of this operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<ClientDiscoveryForLogSpecification>,
 }
 impl ClientDiscoveryForServiceSpecification {
@@ -112,7 +117,11 @@ impl ClientDiscoveryForServiceSpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryResponse {
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientDiscoveryValueForSingleApi>,
     #[doc = "Link to the next chunk of the response"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -199,13 +208,22 @@ impl CmkKeyVaultProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Error {
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
     #[doc = "The error code."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "The error message."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -555,10 +573,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "[backup-ecs1, backup-prot1, backup-prot1b, backup-prot1c, backup-id1]"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -570,7 +598,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResources {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to the next chunk of the response"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -743,7 +775,11 @@ impl ReplicationUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationUsageList {
     #[doc = "The list of replication usages for the given vault."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationUsage>,
 }
 impl azure_core::Continuable for ReplicationUsageList {
@@ -1208,7 +1244,11 @@ impl VaultExtendedInfoResource {
 #[doc = "The response model for a list of Vaults."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vault>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1234,7 +1274,12 @@ pub struct VaultProperties {
     #[serde(rename = "upgradeDetails", default, skip_serializing_if = "Option::is_none")]
     pub upgrade_details: Option<UpgradeDetails>,
     #[doc = "List of private endpoint connection."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionVaultProperties>,
     #[doc = "Private endpoint state for backup."]
     #[serde(rename = "privateEndpointStateForBackup", default, skip_serializing_if = "Option::is_none")]
@@ -1590,7 +1635,11 @@ pub mod vault_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultUsageList {
     #[doc = "The list of usages for the given vault."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VaultUsage>,
 }
 impl azure_core::Continuable for VaultUsageList {
diff --git a/services/mgmt/recoveryservices/src/package_preview_2022_01/models.rs b/services/mgmt/recoveryservices/src/package_preview_2022_01/models.rs
index add3798a96..73c70380ea 100644
--- a/services/mgmt/recoveryservices/src/package_preview_2022_01/models.rs
+++ b/services/mgmt/recoveryservices/src/package_preview_2022_01/models.rs
@@ -6,7 +6,12 @@ use std::str::FromStr;
 #[doc = "Capabilities information"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesProperties {
-    #[serde(rename = "dnsZones", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsZones",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_zones: Vec<DnsZone>,
 }
 impl CapabilitiesProperties {
@@ -34,7 +39,12 @@ impl CapabilitiesResponse {
 #[doc = "Capabilities properties in response"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CapabilitiesResponseProperties {
-    #[serde(rename = "dnsZones", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsZones",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_zones: Vec<DnsZoneResponse>,
 }
 impl CapabilitiesResponseProperties {
@@ -139,7 +149,12 @@ impl ClientDiscoveryForProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryForServiceSpecification {
     #[doc = "List of log specifications of this operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<ClientDiscoveryForLogSpecification>,
 }
 impl ClientDiscoveryForServiceSpecification {
@@ -151,7 +166,11 @@ impl ClientDiscoveryForServiceSpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryResponse {
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientDiscoveryValueForSingleApi>,
     #[doc = "Link to the next chunk of the response"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -292,7 +311,12 @@ pub struct DnsZoneResponse {
     #[serde(flatten)]
     pub dns_zone: DnsZone,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl DnsZoneResponse {
@@ -304,13 +328,22 @@ impl DnsZoneResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Error {
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
     #[doc = "The error code."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "The error message."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -660,10 +693,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "[backup-ecs1, backup-prot1, backup-prot1b, backup-prot1c, backup-id1]"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -675,7 +718,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResources {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to the next chunk of the response"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -848,7 +895,11 @@ impl ReplicationUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationUsageList {
     #[doc = "The list of replication usages for the given vault."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationUsage>,
 }
 impl azure_core::Continuable for ReplicationUsageList {
@@ -1342,7 +1393,11 @@ impl VaultExtendedInfoResource {
 #[doc = "The response model for a list of Vaults."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Vault>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1368,7 +1423,12 @@ pub struct VaultProperties {
     #[serde(rename = "upgradeDetails", default, skip_serializing_if = "Option::is_none")]
     pub upgrade_details: Option<UpgradeDetails>,
     #[doc = "List of private endpoint connection."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionVaultProperties>,
     #[doc = "Private endpoint state for backup."]
     #[serde(rename = "privateEndpointStateForBackup", default, skip_serializing_if = "Option::is_none")]
@@ -1724,7 +1784,11 @@ pub mod vault_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultUsageList {
     #[doc = "The list of usages for the given vault."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VaultUsage>,
 }
 impl azure_core::Continuable for VaultUsageList {
diff --git a/services/mgmt/recoveryservicesbackup/src/package_2021_12/models.rs b/services/mgmt/recoveryservicesbackup/src/package_2021_12/models.rs
index 7151510769..cf2cb9baa1 100644
--- a/services/mgmt/recoveryservicesbackup/src/package_2021_12/models.rs
+++ b/services/mgmt/recoveryservicesbackup/src/package_2021_12/models.rs
@@ -290,7 +290,12 @@ pub struct AzureFileShareRestoreRequest {
     #[serde(rename = "restoreRequestType", default, skip_serializing_if = "Option::is_none")]
     pub restore_request_type: Option<azure_file_share_restore_request::RestoreRequestType>,
     #[doc = "List of Source Files/Folders(which need to recover) and TargetFolderPath details"]
-    #[serde(rename = "restoreFileSpecs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreFileSpecs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_file_specs: Vec<RestoreFileSpecs>,
     #[doc = "Target Azure File Share Info."]
     #[serde(rename = "targetDetails", default, skip_serializing_if = "Option::is_none")]
@@ -634,7 +639,11 @@ pub struct AzureIaaSvmErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl AzureIaaSvmErrorInfo {
@@ -662,10 +671,20 @@ pub struct AzureIaaSvmJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureIaaSvmErrorInfo>,
     #[doc = "Specifies whether the backup item is a Classic or an Azure Resource Manager VM."]
     #[serde(rename = "virtualMachineVersion", default, skip_serializing_if = "Option::is_none")]
@@ -698,7 +717,12 @@ impl AzureIaaSvmJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureIaaSvmJobExtendedInfo {
     #[doc = "List of tasks associated with this job."]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<AzureIaaSvmJobTaskDetails>,
     #[doc = "Job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -760,7 +784,12 @@ pub struct AzureIaaSvmJobV2 {
     #[serde(flatten)]
     pub job: Job,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Container name of the entity on which the current job is executing."]
     #[serde(rename = "containerName", default, skip_serializing_if = "Option::is_none")]
@@ -769,7 +798,12 @@ pub struct AzureIaaSvmJobV2 {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureIaaSvmErrorInfo>,
     #[doc = "Specifies whether the backup item is a Classic or an Azure Resource Manager VM."]
     #[serde(rename = "virtualMachineVersion", default, skip_serializing_if = "Option::is_none")]
@@ -812,7 +846,12 @@ pub struct AzureIaaSvmProtectedItem {
     #[serde(rename = "healthStatus", default, skip_serializing_if = "Option::is_none")]
     pub health_status: Option<azure_iaa_svm_protected_item::HealthStatus>,
     #[doc = "Health details on this backup item."]
-    #[serde(rename = "healthDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_details: Vec<AzureIaaSvmHealthDetails>,
     #[doc = "Health details of different KPIs"]
     #[serde(rename = "kpisHealths", default, skip_serializing_if = "Option::is_none")]
@@ -1291,7 +1330,11 @@ pub struct AzureStorageErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl AzureStorageErrorInfo {
@@ -1308,10 +1351,20 @@ pub struct AzureStorageJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureStorageErrorInfo>,
     #[doc = "Specifies friendly name of the storage account."]
     #[serde(rename = "storageAccountName", default, skip_serializing_if = "Option::is_none")]
@@ -1344,7 +1397,12 @@ impl AzureStorageJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureStorageJobExtendedInfo {
     #[doc = "List of tasks for this job"]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<AzureStorageJobTaskDetails>,
     #[doc = "Job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -1807,7 +1865,12 @@ pub struct AzureVmWorkloadProtectionPolicy {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub settings: Option<Settings>,
     #[doc = "List of sub-protection policies which includes schedule and retention"]
-    #[serde(rename = "subProtectionPolicy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subProtectionPolicy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_protection_policy: Vec<SubProtectionPolicy>,
     #[doc = "Fix the policy inconsistency"]
     #[serde(rename = "makePolicyConsistent", default, skip_serializing_if = "Option::is_none")]
@@ -2074,7 +2137,12 @@ pub struct AzureVmWorkloadSqlInstanceWorkloadItem {
     #[serde(flatten)]
     pub azure_vm_workload_item: AzureVmWorkloadItem,
     #[doc = "Data Directory Paths for default directories"]
-    #[serde(rename = "dataDirectoryPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDirectoryPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_directory_paths: Vec<SqlDataDirectory>,
 }
 impl AzureVmWorkloadSqlInstanceWorkloadItem {
@@ -2336,7 +2404,12 @@ pub struct AzureWorkloadContainerExtendedInfo {
     #[serde(rename = "inquiryInfo", default, skip_serializing_if = "Option::is_none")]
     pub inquiry_info: Option<InquiryInfo>,
     #[doc = "List of the nodes in case of distributed container."]
-    #[serde(rename = "nodesList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nodesList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes_list: Vec<DistributedNodesInfo>,
 }
 impl AzureWorkloadContainerExtendedInfo {
@@ -2357,7 +2430,11 @@ pub struct AzureWorkloadErrorInfo {
     #[serde(rename = "errorTitle", default, skip_serializing_if = "Option::is_none")]
     pub error_title: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
     #[doc = "Additional details for above error code."]
     #[serde(rename = "additionalDetails", default, skip_serializing_if = "Option::is_none")]
@@ -2380,10 +2457,20 @@ pub struct AzureWorkloadJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureWorkloadErrorInfo>,
     #[doc = "Azure VM workload-specific additional information for job."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -2405,7 +2492,12 @@ impl AzureWorkloadJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureWorkloadJobExtendedInfo {
     #[doc = "List of tasks for this job"]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<AzureWorkloadJobTaskDetails>,
     #[doc = "Job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -2440,7 +2532,12 @@ pub struct AzureWorkloadPointInTimeRecoveryPoint {
     #[serde(flatten)]
     pub azure_workload_recovery_point: AzureWorkloadRecoveryPoint,
     #[doc = "List of log ranges"]
-    #[serde(rename = "timeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_ranges: Vec<PointInTimeRange>,
 }
 impl AzureWorkloadPointInTimeRecoveryPoint {
@@ -2480,7 +2577,12 @@ pub struct AzureWorkloadRecoveryPoint {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<azure_workload_recovery_point::Type>,
     #[doc = "Recovery point tier information."]
-    #[serde(rename = "recoveryPointTierDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryPointTierDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_point_tier_details: Vec<RecoveryPointTierInformationV2>,
     #[doc = "Eligibility of RP to be moved to another tier"]
     #[serde(rename = "recoveryPointMoveReadinessInfo", default, skip_serializing_if = "Option::is_none")]
@@ -2834,7 +2936,12 @@ pub struct AzureWorkloadSqlPointInTimeRecoveryPoint {
     #[serde(flatten)]
     pub azure_workload_sql_recovery_point: AzureWorkloadSqlRecoveryPoint,
     #[doc = "List of log ranges"]
-    #[serde(rename = "timeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_ranges: Vec<PointInTimeRange>,
 }
 impl AzureWorkloadSqlPointInTimeRecoveryPoint {
@@ -2903,7 +3010,12 @@ pub struct AzureWorkloadSqlRecoveryPointExtendedInfo {
     #[serde(rename = "dataDirectoryTimeInUTC", default, with = "azure_core::date::rfc3339::option")]
     pub data_directory_time_in_utc: Option<time::OffsetDateTime>,
     #[doc = "List of data directory paths during restore operation."]
-    #[serde(rename = "dataDirectoryPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDirectoryPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_directory_paths: Vec<SqlDataDirectory>,
 }
 impl AzureWorkloadSqlRecoveryPointExtendedInfo {
@@ -2923,7 +3035,12 @@ pub struct AzureWorkloadSqlRestoreRequest {
     #[serde(rename = "isNonRecoverable", default, skip_serializing_if = "Option::is_none")]
     pub is_non_recoverable: Option<bool>,
     #[doc = "Data directory details"]
-    #[serde(rename = "alternateDirectoryPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateDirectoryPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_directory_paths: Vec<SqlDataDirectoryMapping>,
 }
 impl AzureWorkloadSqlRestoreRequest {
@@ -4129,7 +4246,11 @@ pub struct BackupEngineBaseResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupEngineBaseResource>,
 }
 impl azure_core::Continuable for BackupEngineBaseResourceList {
@@ -4255,7 +4376,11 @@ pub mod backup_management_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupManagementUsageList {
     #[doc = "The list of backup management usages for the given vault."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupManagementUsage>,
 }
 impl azure_core::Continuable for BackupManagementUsageList {
@@ -4752,7 +4877,12 @@ pub struct BackupResourceVaultConfig {
     #[serde(rename = "softDeleteFeatureState", default, skip_serializing_if = "Option::is_none")]
     pub soft_delete_feature_state: Option<backup_resource_vault_config::SoftDeleteFeatureState>,
     #[doc = "ResourceGuard Operation Requests"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
     #[doc = "Is soft delete feature state editable"]
     #[serde(rename = "isSoftDeleteFeatureStateEditable", default, skip_serializing_if = "Option::is_none")]
@@ -5249,7 +5379,12 @@ impl ClientDiscoveryForProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryForServiceSpecification {
     #[doc = "List of log specifications of this operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<ClientDiscoveryForLogSpecification>,
 }
 impl ClientDiscoveryForServiceSpecification {
@@ -5261,7 +5396,11 @@ impl ClientDiscoveryForServiceSpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryResponse {
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientDiscoveryValueForSingleApi>,
     #[doc = "Link to the next chunk of Response."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5354,10 +5493,19 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl CloudErrorBody {
@@ -5531,7 +5679,12 @@ impl DpmProtectedItemExtendedInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DailyRetentionFormat {
     #[doc = "List of days of the month."]
-    #[serde(rename = "daysOfTheMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_month: Vec<Day>,
 }
 impl DailyRetentionFormat {
@@ -5543,7 +5696,12 @@ impl DailyRetentionFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DailyRetentionSchedule {
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
@@ -5557,7 +5715,12 @@ impl DailyRetentionSchedule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DailySchedule {
     #[doc = "List of times of day this schedule has to be run."]
-    #[serde(rename = "scheduleRunTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_times: Vec<time::OffsetDateTime>,
 }
 impl DailySchedule {
@@ -5583,7 +5746,12 @@ impl Day {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskExclusionProperties {
     #[doc = "List of Disks' Logical Unit Numbers (LUN) to be used for VM Protection."]
-    #[serde(rename = "diskLunList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskLunList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_lun_list: Vec<i32>,
     #[doc = "Flag to indicate whether DiskLunList is to be included/ excluded from backup."]
     #[serde(rename = "isInclusionList", default, skip_serializing_if = "Option::is_none")]
@@ -5654,7 +5822,12 @@ pub struct DpmContainer {
     #[serde(rename = "dpmAgentVersion", default, skip_serializing_if = "Option::is_none")]
     pub dpm_agent_version: Option<String>,
     #[doc = "List of BackupEngines protecting the container"]
-    #[serde(rename = "dpmServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dpmServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dpm_servers: Vec<String>,
     #[doc = "To check if upgrade available"]
     #[serde(rename = "upgradeAvailable", default, skip_serializing_if = "Option::is_none")]
@@ -5688,7 +5861,11 @@ pub struct DpmErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl DpmErrorInfo {
@@ -5717,10 +5894,20 @@ pub struct DpmJob {
     #[serde(rename = "workloadType", default, skip_serializing_if = "Option::is_none")]
     pub workload_type: Option<String>,
     #[doc = "The state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "The errors."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<DpmErrorInfo>,
     #[doc = "Additional information on the DPM workload-specific job."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -5745,7 +5932,12 @@ impl DpmJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DpmJobExtendedInfo {
     #[doc = "List of tasks associated with this job."]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<DpmJobTaskDetails>,
     #[doc = "The job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -5832,7 +6024,11 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "List of recommendation strings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl ErrorDetail {
@@ -6026,7 +6222,12 @@ pub struct GenericProtectionPolicy {
     #[serde(flatten)]
     pub protection_policy: ProtectionPolicy,
     #[doc = "List of sub-protection policies which includes schedule and retention"]
-    #[serde(rename = "subProtectionPolicy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subProtectionPolicy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_protection_policy: Vec<SubProtectionPolicy>,
     #[doc = "TimeZone optional input as string. For example: TimeZone = \"Pacific Standard Time\"."]
     #[serde(rename = "timeZone", default, skip_serializing_if = "Option::is_none")]
@@ -6252,7 +6453,12 @@ pub struct IaasVmRecoveryPoint {
     #[serde(rename = "isInstantIlrSessionActive", default, skip_serializing_if = "Option::is_none")]
     pub is_instant_ilr_session_active: Option<bool>,
     #[doc = "Recovery point tier information."]
-    #[serde(rename = "recoveryPointTierDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryPointTierDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_point_tier_details: Vec<RecoveryPointTierInformationV2>,
     #[doc = "Whether VM is with Managed Disks"]
     #[serde(rename = "isManagedVirtualMachine", default, skip_serializing_if = "Option::is_none")]
@@ -6270,7 +6476,11 @@ pub struct IaasVmRecoveryPoint {
     #[serde(rename = "recoveryPointDiskConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub recovery_point_disk_configuration: Option<RecoveryPointDiskConfiguration>,
     #[doc = "Identifies the zone of the VM at the time of backup. Applicable only for zone-pinned Vms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Eligibility of RP to be moved to another tier"]
     #[serde(rename = "recoveryPointMoveReadinessInfo", default, skip_serializing_if = "Option::is_none")]
@@ -6346,7 +6556,12 @@ pub struct IaasVmRestoreRequest {
     #[serde(rename = "encryptionDetails", default, skip_serializing_if = "Option::is_none")]
     pub encryption_details: Option<EncryptionDetails>,
     #[doc = "List of Disk LUNs for partial restore"]
-    #[serde(rename = "restoreDiskLunList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreDiskLunList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_disk_lun_list: Vec<i32>,
     #[doc = "Flag to denote of an Unmanaged disk VM should be restored with Managed disks."]
     #[serde(rename = "restoreWithManagedDisks", default, skip_serializing_if = "Option::is_none")]
@@ -6355,7 +6570,11 @@ pub struct IaasVmRestoreRequest {
     #[serde(rename = "diskEncryptionSetId", default, skip_serializing_if = "Option::is_none")]
     pub disk_encryption_set_id: Option<String>,
     #[doc = "Target zone where the VM and its disks should be restored."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Encapsulates Managed Identity related information"]
     #[serde(rename = "identityInfo", default, skip_serializing_if = "Option::is_none")]
@@ -6494,7 +6713,12 @@ pub struct InquiryInfo {
     #[serde(rename = "errorDetail", default, skip_serializing_if = "Option::is_none")]
     pub error_detail: Option<ErrorDetail>,
     #[doc = "Inquiry Details which will have workload specific details.\r\nFor e.g. - For SQL and oracle this will contain different details."]
-    #[serde(rename = "inquiryDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inquiryDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inquiry_details: Vec<WorkloadInquiryDetails>,
 }
 impl InquiryInfo {
@@ -6524,7 +6748,12 @@ impl InquiryValidation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstantItemRecoveryTarget {
     #[doc = "List of client scripts."]
-    #[serde(rename = "clientScripts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientScripts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_scripts: Vec<ClientScriptForConnect>,
 }
 impl InstantItemRecoveryTarget {
@@ -6849,7 +7078,11 @@ pub struct JobResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResource>,
 }
 impl azure_core::Continuable for JobResourceList {
@@ -6888,7 +7121,12 @@ pub struct KpiResourceHealthDetails {
     #[serde(rename = "resourceHealthStatus", default, skip_serializing_if = "Option::is_none")]
     pub resource_health_status: Option<kpi_resource_health_details::ResourceHealthStatus>,
     #[doc = "Resource Health Status"]
-    #[serde(rename = "resourceHealthDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceHealthDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_health_details: Vec<ResourceHealthDetails>,
 }
 impl KpiResourceHealthDetails {
@@ -6969,7 +7207,12 @@ pub struct ListRecoveryPointsRecommendedForMoveRequest {
     #[serde(rename = "objectType", default, skip_serializing_if = "Option::is_none")]
     pub object_type: Option<String>,
     #[doc = "List of Recovery Points excluded from Move"]
-    #[serde(rename = "excludedRPList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedRPList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_rp_list: Vec<String>,
 }
 impl ListRecoveryPointsRecommendedForMoveRequest {
@@ -7047,7 +7290,11 @@ pub struct MabContainerHealthDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Health Recommended Actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl MabContainerHealthDetails {
@@ -7076,7 +7323,12 @@ pub struct MabContainer {
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
     pub extended_info: Option<MabContainerExtendedInfo>,
     #[doc = "Health details on this mab container."]
-    #[serde(rename = "mabContainerHealthDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mabContainerHealthDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mab_container_health_details: Vec<MabContainerHealthDetails>,
     #[doc = "Health state of mab container."]
     #[serde(rename = "containerHealthState", default, skip_serializing_if = "Option::is_none")]
@@ -7106,7 +7358,12 @@ pub struct MabContainerExtendedInfo {
     #[serde(rename = "backupItemType", default, skip_serializing_if = "Option::is_none")]
     pub backup_item_type: Option<mab_container_extended_info::BackupItemType>,
     #[doc = "List of backup items associated with this container."]
-    #[serde(rename = "backupItems", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupItems",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_items: Vec<String>,
     #[doc = "Backup policy associated with this container."]
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
@@ -7199,7 +7456,11 @@ pub struct MabErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl MabErrorInfo {
@@ -7275,7 +7536,12 @@ pub struct MabJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "The state/actions applicable on jobs like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Name of server protecting the DS."]
     #[serde(rename = "mabServerName", default, skip_serializing_if = "Option::is_none")]
@@ -7287,7 +7553,12 @@ pub struct MabJob {
     #[serde(rename = "workloadType", default, skip_serializing_if = "Option::is_none")]
     pub workload_type: Option<mab_job::WorkloadType>,
     #[doc = "The errors."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<MabErrorInfo>,
     #[doc = "Additional information for the MAB workload-specific job."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -7452,7 +7723,12 @@ pub mod mab_job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MabJobExtendedInfo {
     #[doc = "List of tasks for this job."]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<MabJobTaskDetails>,
     #[doc = "The job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -7524,7 +7800,12 @@ pub struct MonthlyRetentionSchedule {
     #[serde(rename = "retentionScheduleWeekly", default, skip_serializing_if = "Option::is_none")]
     pub retention_schedule_weekly: Option<WeeklyRetentionFormat>,
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
@@ -7661,10 +7942,19 @@ pub mod new_error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<NewErrorResponse>,
         #[doc = "The error additional info."]
-        #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalInfo",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_info: Vec<ErrorAdditionalInfo>,
     }
     impl Error {
@@ -7679,7 +7969,12 @@ pub struct OperationResultInfo {
     #[serde(flatten)]
     pub operation_result_info_base: OperationResultInfoBase,
     #[doc = "List of jobs created by this operation."]
-    #[serde(rename = "jobList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_list: Vec<String>,
 }
 impl OperationResultInfo {
@@ -7842,7 +8137,12 @@ pub struct OperationStatusJobsExtendedInfo {
     #[serde(flatten)]
     pub operation_status_extended_info: OperationStatusExtendedInfo,
     #[doc = "IDs of the jobs created for the protected item."]
-    #[serde(rename = "jobIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_ids: Vec<String>,
     #[doc = "Stores all the failed jobs along with the corresponding error codes."]
     #[serde(rename = "failedJobsError", default, skip_serializing_if = "Option::is_none")]
@@ -8211,7 +8511,12 @@ pub struct PrepareDataMoveRequest {
     #[serde(rename = "dataMoveLevel")]
     pub data_move_level: prepare_data_move_request::DataMoveLevel,
     #[doc = "Source Container ArmIds\r\nThis needs to be populated only if DataMoveLevel is set to container"]
-    #[serde(rename = "sourceContainerArmIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceContainerArmIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_container_arm_ids: Vec<String>,
     #[doc = "Ignore the artifacts which are already moved."]
     #[serde(rename = "ignoreMoved", default, skip_serializing_if = "Option::is_none")]
@@ -8578,7 +8883,11 @@ pub struct ProtectableContainerResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectableContainerResource>,
 }
 impl azure_core::Continuable for ProtectableContainerResourceList {
@@ -8638,7 +8947,12 @@ pub struct ProtectedItem {
     #[serde(rename = "isRehydrate", default, skip_serializing_if = "Option::is_none")]
     pub is_rehydrate: Option<bool>,
     #[doc = "ResourceGuardOperationRequests on which LAC check will be performed"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
     #[doc = "Flag to identify whether datasource is protected in archive"]
     #[serde(rename = "isArchiveEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -9058,7 +9372,11 @@ pub struct ProtectedItemResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectedItemResource>,
 }
 impl azure_core::Continuable for ProtectedItemResourceList {
@@ -9264,7 +9582,11 @@ pub struct ProtectionContainerResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionContainerResource>,
 }
 impl azure_core::Continuable for ProtectionContainerResourceList {
@@ -9605,7 +9927,11 @@ pub struct ProtectionIntentResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionIntentResource>,
 }
 impl azure_core::Continuable for ProtectionIntentResourceList {
@@ -9629,7 +9955,12 @@ pub struct ProtectionPolicy {
     #[serde(rename = "backupManagementType")]
     pub backup_management_type: String,
     #[doc = "ResourceGuard Operation Requests"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
 }
 impl ProtectionPolicy {
@@ -9805,7 +10136,11 @@ pub struct ProtectionPolicyResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionPolicyResource>,
 }
 impl azure_core::Continuable for ProtectionPolicyResourceList {
@@ -9841,10 +10176,20 @@ pub struct RecoveryPointDiskConfiguration {
     #[serde(rename = "numberOfDisksAttachedToVm", default, skip_serializing_if = "Option::is_none")]
     pub number_of_disks_attached_to_vm: Option<i32>,
     #[doc = "Information of disks included in backup"]
-    #[serde(rename = "includedDiskList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedDiskList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_disk_list: Vec<DiskInformation>,
     #[doc = "Information of disks excluded from backup"]
-    #[serde(rename = "excludedDiskList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedDiskList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_disk_list: Vec<DiskInformation>,
 }
 impl RecoveryPointDiskConfiguration {
@@ -9939,7 +10284,11 @@ pub struct RecoveryPointResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryPointResource>,
 }
 impl azure_core::Continuable for RecoveryPointResourceList {
@@ -10144,7 +10493,12 @@ impl ResourceGuardOperationDetail {
 pub struct ResourceGuardProxyBase {
     #[serde(rename = "resourceGuardResourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_guard_resource_id: Option<String>,
-    #[serde(rename = "resourceGuardOperationDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_details: Vec<ResourceGuardOperationDetail>,
     #[serde(rename = "lastUpdatedTime", default, skip_serializing_if = "Option::is_none")]
     pub last_updated_time: Option<String>,
@@ -10174,7 +10528,11 @@ pub struct ResourceGuardProxyBaseResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceGuardProxyBaseResource>,
 }
 impl azure_core::Continuable for ResourceGuardProxyBaseResourceList {
@@ -10201,7 +10559,11 @@ pub struct ResourceHealthDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Health Recommended Actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl ResourceHealthDetails {
@@ -10477,7 +10839,12 @@ impl SchedulePolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityPinBase {
     #[doc = "ResourceGuard Operation Requests"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
 }
 impl SecurityPinBase {
@@ -10529,10 +10896,20 @@ pub struct SimpleSchedulePolicy {
     #[serde(rename = "scheduleRunFrequency", default, skip_serializing_if = "Option::is_none")]
     pub schedule_run_frequency: Option<simple_schedule_policy::ScheduleRunFrequency>,
     #[doc = "List of days of week this schedule has to be run."]
-    #[serde(rename = "scheduleRunDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_days: Vec<String>,
     #[doc = "List of times of day this schedule has to be run."]
-    #[serde(rename = "scheduleRunTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_times: Vec<time::OffsetDateTime>,
     #[serde(rename = "hourlySchedule", default, skip_serializing_if = "Option::is_none")]
     pub hourly_schedule: Option<HourlySchedule>,
@@ -10952,7 +11329,12 @@ pub struct TriggerDataMoveRequest {
     #[serde(rename = "correlationId")]
     pub correlation_id: String,
     #[doc = "Source Container ArmIds"]
-    #[serde(rename = "sourceContainerArmIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceContainerArmIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_container_arm_ids: Vec<String>,
     #[doc = "Pause GC"]
     #[serde(rename = "pauseGC", default, skip_serializing_if = "Option::is_none")]
@@ -11020,7 +11402,12 @@ pub mod trigger_data_move_request {
 #[doc = "Request body of unlock delete API."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UnlockDeleteRequest {
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
     #[serde(rename = "resourceToBeDeleted", default, skip_serializing_if = "Option::is_none")]
     pub resource_to_be_deleted: Option<String>,
@@ -11071,7 +11458,12 @@ impl ValidateOperationRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ValidateOperationResponse {
     #[doc = "Gets the validation result"]
-    #[serde(rename = "validationResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_results: Vec<ErrorDetail>,
 }
 impl ValidateOperationResponse {
@@ -11116,10 +11508,20 @@ pub struct VaultJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<VaultJobErrorInfo>,
     #[doc = "Vault Job for CMK - has CMK specific info."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -11146,7 +11548,11 @@ pub struct VaultJobErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl VaultJobErrorInfo {
@@ -11182,10 +11588,20 @@ impl VaultStorageConfigOperationResultResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeeklyRetentionFormat {
     #[doc = "List of days of the week."]
-    #[serde(rename = "daysOfTheWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_week: Vec<String>,
     #[doc = "List of weeks of month."]
-    #[serde(rename = "weeksOfTheMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weeksOfTheMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weeks_of_the_month: Vec<String>,
 }
 impl WeeklyRetentionFormat {
@@ -11197,10 +11613,20 @@ impl WeeklyRetentionFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeeklyRetentionSchedule {
     #[doc = "List of days of week for weekly retention policy."]
-    #[serde(rename = "daysOfTheWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_week: Vec<String>,
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
@@ -11213,10 +11639,20 @@ impl WeeklyRetentionSchedule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeeklySchedule {
-    #[serde(rename = "scheduleRunDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_days: Vec<String>,
     #[doc = "List of times of day this schedule has to be run."]
-    #[serde(rename = "scheduleRunTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_times: Vec<time::OffsetDateTime>,
 }
 impl WeeklySchedule {
@@ -11338,7 +11774,11 @@ pub struct WorkloadItemResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadItemResource>,
 }
 impl azure_core::Continuable for WorkloadItemResourceList {
@@ -11448,7 +11888,11 @@ pub struct WorkloadProtectableItemResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadProtectableItemResource>,
 }
 impl azure_core::Continuable for WorkloadProtectableItemResourceList {
@@ -11469,7 +11913,12 @@ pub struct YearlyRetentionSchedule {
     #[serde(rename = "retentionScheduleFormatType", default, skip_serializing_if = "Option::is_none")]
     pub retention_schedule_format_type: Option<yearly_retention_schedule::RetentionScheduleFormatType>,
     #[doc = "List of months of year of yearly retention policy."]
-    #[serde(rename = "monthsOfYear", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthsOfYear",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub months_of_year: Vec<String>,
     #[doc = "Daily retention format."]
     #[serde(rename = "retentionScheduleDaily", default, skip_serializing_if = "Option::is_none")]
@@ -11478,7 +11927,12 @@ pub struct YearlyRetentionSchedule {
     #[serde(rename = "retentionScheduleWeekly", default, skip_serializing_if = "Option::is_none")]
     pub retention_schedule_weekly: Option<WeeklyRetentionFormat>,
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/recoveryservicesbackup/src/package_2022_01/models.rs b/services/mgmt/recoveryservicesbackup/src/package_2022_01/models.rs
index d6bb35a002..b7831da172 100644
--- a/services/mgmt/recoveryservicesbackup/src/package_2022_01/models.rs
+++ b/services/mgmt/recoveryservicesbackup/src/package_2022_01/models.rs
@@ -290,7 +290,12 @@ pub struct AzureFileShareRestoreRequest {
     #[serde(rename = "restoreRequestType", default, skip_serializing_if = "Option::is_none")]
     pub restore_request_type: Option<azure_file_share_restore_request::RestoreRequestType>,
     #[doc = "List of Source Files/Folders(which need to recover) and TargetFolderPath details"]
-    #[serde(rename = "restoreFileSpecs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreFileSpecs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_file_specs: Vec<RestoreFileSpecs>,
     #[doc = "Target Azure File Share Info."]
     #[serde(rename = "targetDetails", default, skip_serializing_if = "Option::is_none")]
@@ -634,7 +639,11 @@ pub struct AzureIaaSvmErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl AzureIaaSvmErrorInfo {
@@ -662,10 +671,20 @@ pub struct AzureIaaSvmJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureIaaSvmErrorInfo>,
     #[doc = "Specifies whether the backup item is a Classic or an Azure Resource Manager VM."]
     #[serde(rename = "virtualMachineVersion", default, skip_serializing_if = "Option::is_none")]
@@ -698,7 +717,12 @@ impl AzureIaaSvmJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureIaaSvmJobExtendedInfo {
     #[doc = "List of tasks associated with this job."]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<AzureIaaSvmJobTaskDetails>,
     #[doc = "Job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -760,7 +784,12 @@ pub struct AzureIaaSvmJobV2 {
     #[serde(flatten)]
     pub job: Job,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Container name of the entity on which the current job is executing."]
     #[serde(rename = "containerName", default, skip_serializing_if = "Option::is_none")]
@@ -769,7 +798,12 @@ pub struct AzureIaaSvmJobV2 {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureIaaSvmErrorInfo>,
     #[doc = "Specifies whether the backup item is a Classic or an Azure Resource Manager VM."]
     #[serde(rename = "virtualMachineVersion", default, skip_serializing_if = "Option::is_none")]
@@ -812,7 +846,12 @@ pub struct AzureIaaSvmProtectedItem {
     #[serde(rename = "healthStatus", default, skip_serializing_if = "Option::is_none")]
     pub health_status: Option<azure_iaa_svm_protected_item::HealthStatus>,
     #[doc = "Health details on this backup item."]
-    #[serde(rename = "healthDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_details: Vec<AzureIaaSvmHealthDetails>,
     #[doc = "Health details of different KPIs"]
     #[serde(rename = "kpisHealths", default, skip_serializing_if = "Option::is_none")]
@@ -1278,7 +1317,11 @@ pub struct AzureStorageErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl AzureStorageErrorInfo {
@@ -1295,10 +1338,20 @@ pub struct AzureStorageJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureStorageErrorInfo>,
     #[doc = "Specifies friendly name of the storage account."]
     #[serde(rename = "storageAccountName", default, skip_serializing_if = "Option::is_none")]
@@ -1331,7 +1384,12 @@ impl AzureStorageJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureStorageJobExtendedInfo {
     #[doc = "List of tasks for this job"]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<AzureStorageJobTaskDetails>,
     #[doc = "Job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -1785,7 +1843,12 @@ pub struct AzureVmWorkloadProtectionPolicy {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub settings: Option<Settings>,
     #[doc = "List of sub-protection policies which includes schedule and retention"]
-    #[serde(rename = "subProtectionPolicy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subProtectionPolicy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_protection_policy: Vec<SubProtectionPolicy>,
     #[doc = "Fix the policy inconsistency"]
     #[serde(rename = "makePolicyConsistent", default, skip_serializing_if = "Option::is_none")]
@@ -2052,7 +2115,12 @@ pub struct AzureVmWorkloadSqlInstanceWorkloadItem {
     #[serde(flatten)]
     pub azure_vm_workload_item: AzureVmWorkloadItem,
     #[doc = "Data Directory Paths for default directories"]
-    #[serde(rename = "dataDirectoryPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDirectoryPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_directory_paths: Vec<SqlDataDirectory>,
 }
 impl AzureVmWorkloadSqlInstanceWorkloadItem {
@@ -2314,7 +2382,12 @@ pub struct AzureWorkloadContainerExtendedInfo {
     #[serde(rename = "inquiryInfo", default, skip_serializing_if = "Option::is_none")]
     pub inquiry_info: Option<InquiryInfo>,
     #[doc = "List of the nodes in case of distributed container."]
-    #[serde(rename = "nodesList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nodesList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes_list: Vec<DistributedNodesInfo>,
 }
 impl AzureWorkloadContainerExtendedInfo {
@@ -2335,7 +2408,11 @@ pub struct AzureWorkloadErrorInfo {
     #[serde(rename = "errorTitle", default, skip_serializing_if = "Option::is_none")]
     pub error_title: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
     #[doc = "Additional details for above error code."]
     #[serde(rename = "additionalDetails", default, skip_serializing_if = "Option::is_none")]
@@ -2358,10 +2435,20 @@ pub struct AzureWorkloadJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureWorkloadErrorInfo>,
     #[doc = "Azure VM workload-specific additional information for job."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -2383,7 +2470,12 @@ impl AzureWorkloadJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureWorkloadJobExtendedInfo {
     #[doc = "List of tasks for this job"]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<AzureWorkloadJobTaskDetails>,
     #[doc = "Job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -2418,7 +2510,12 @@ pub struct AzureWorkloadPointInTimeRecoveryPoint {
     #[serde(flatten)]
     pub azure_workload_recovery_point: AzureWorkloadRecoveryPoint,
     #[doc = "List of log ranges"]
-    #[serde(rename = "timeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_ranges: Vec<PointInTimeRange>,
 }
 impl AzureWorkloadPointInTimeRecoveryPoint {
@@ -2458,7 +2555,12 @@ pub struct AzureWorkloadRecoveryPoint {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<azure_workload_recovery_point::Type>,
     #[doc = "Recovery point tier information."]
-    #[serde(rename = "recoveryPointTierDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryPointTierDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_point_tier_details: Vec<RecoveryPointTierInformationV2>,
     #[doc = "Eligibility of RP to be moved to another tier"]
     #[serde(rename = "recoveryPointMoveReadinessInfo", default, skip_serializing_if = "Option::is_none")]
@@ -2812,7 +2914,12 @@ pub struct AzureWorkloadSqlPointInTimeRecoveryPoint {
     #[serde(flatten)]
     pub azure_workload_sql_recovery_point: AzureWorkloadSqlRecoveryPoint,
     #[doc = "List of log ranges"]
-    #[serde(rename = "timeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_ranges: Vec<PointInTimeRange>,
 }
 impl AzureWorkloadSqlPointInTimeRecoveryPoint {
@@ -2881,7 +2988,12 @@ pub struct AzureWorkloadSqlRecoveryPointExtendedInfo {
     #[serde(rename = "dataDirectoryTimeInUTC", default, with = "azure_core::date::rfc3339::option")]
     pub data_directory_time_in_utc: Option<time::OffsetDateTime>,
     #[doc = "List of data directory paths during restore operation."]
-    #[serde(rename = "dataDirectoryPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDirectoryPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_directory_paths: Vec<SqlDataDirectory>,
 }
 impl AzureWorkloadSqlRecoveryPointExtendedInfo {
@@ -2901,7 +3013,12 @@ pub struct AzureWorkloadSqlRestoreRequest {
     #[serde(rename = "isNonRecoverable", default, skip_serializing_if = "Option::is_none")]
     pub is_non_recoverable: Option<bool>,
     #[doc = "Data directory details"]
-    #[serde(rename = "alternateDirectoryPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateDirectoryPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_directory_paths: Vec<SqlDataDirectoryMapping>,
 }
 impl AzureWorkloadSqlRestoreRequest {
@@ -4107,7 +4224,11 @@ pub struct BackupEngineBaseResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupEngineBaseResource>,
 }
 impl azure_core::Continuable for BackupEngineBaseResourceList {
@@ -4233,7 +4354,11 @@ pub mod backup_management_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupManagementUsageList {
     #[doc = "The list of backup management usages for the given vault."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupManagementUsage>,
 }
 impl azure_core::Continuable for BackupManagementUsageList {
@@ -4730,7 +4855,12 @@ pub struct BackupResourceVaultConfig {
     #[serde(rename = "softDeleteFeatureState", default, skip_serializing_if = "Option::is_none")]
     pub soft_delete_feature_state: Option<backup_resource_vault_config::SoftDeleteFeatureState>,
     #[doc = "ResourceGuard Operation Requests"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
     #[doc = "Is soft delete feature state editable"]
     #[serde(rename = "isSoftDeleteFeatureStateEditable", default, skip_serializing_if = "Option::is_none")]
@@ -5227,7 +5357,12 @@ impl ClientDiscoveryForProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryForServiceSpecification {
     #[doc = "List of log specifications of this operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<ClientDiscoveryForLogSpecification>,
 }
 impl ClientDiscoveryForServiceSpecification {
@@ -5239,7 +5374,11 @@ impl ClientDiscoveryForServiceSpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryResponse {
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientDiscoveryValueForSingleApi>,
     #[doc = "Link to the next chunk of Response."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5332,10 +5471,19 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl CloudErrorBody {
@@ -5509,7 +5657,12 @@ impl DpmProtectedItemExtendedInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DailyRetentionFormat {
     #[doc = "List of days of the month."]
-    #[serde(rename = "daysOfTheMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_month: Vec<Day>,
 }
 impl DailyRetentionFormat {
@@ -5521,7 +5674,12 @@ impl DailyRetentionFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DailyRetentionSchedule {
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
@@ -5535,7 +5693,12 @@ impl DailyRetentionSchedule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DailySchedule {
     #[doc = "List of times of day this schedule has to be run."]
-    #[serde(rename = "scheduleRunTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_times: Vec<time::OffsetDateTime>,
 }
 impl DailySchedule {
@@ -5561,7 +5724,12 @@ impl Day {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskExclusionProperties {
     #[doc = "List of Disks' Logical Unit Numbers (LUN) to be used for VM Protection."]
-    #[serde(rename = "diskLunList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskLunList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_lun_list: Vec<i32>,
     #[doc = "Flag to indicate whether DiskLunList is to be included/ excluded from backup."]
     #[serde(rename = "isInclusionList", default, skip_serializing_if = "Option::is_none")]
@@ -5632,7 +5800,12 @@ pub struct DpmContainer {
     #[serde(rename = "dpmAgentVersion", default, skip_serializing_if = "Option::is_none")]
     pub dpm_agent_version: Option<String>,
     #[doc = "List of BackupEngines protecting the container"]
-    #[serde(rename = "dpmServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dpmServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dpm_servers: Vec<String>,
     #[doc = "To check if upgrade available"]
     #[serde(rename = "upgradeAvailable", default, skip_serializing_if = "Option::is_none")]
@@ -5666,7 +5839,11 @@ pub struct DpmErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl DpmErrorInfo {
@@ -5695,10 +5872,20 @@ pub struct DpmJob {
     #[serde(rename = "workloadType", default, skip_serializing_if = "Option::is_none")]
     pub workload_type: Option<String>,
     #[doc = "The state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "The errors."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<DpmErrorInfo>,
     #[doc = "Additional information on the DPM workload-specific job."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -5723,7 +5910,12 @@ impl DpmJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DpmJobExtendedInfo {
     #[doc = "List of tasks associated with this job."]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<DpmJobTaskDetails>,
     #[doc = "The job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -5810,7 +6002,11 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "List of recommendation strings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl ErrorDetail {
@@ -6004,7 +6200,12 @@ pub struct GenericProtectionPolicy {
     #[serde(flatten)]
     pub protection_policy: ProtectionPolicy,
     #[doc = "List of sub-protection policies which includes schedule and retention"]
-    #[serde(rename = "subProtectionPolicy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subProtectionPolicy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_protection_policy: Vec<SubProtectionPolicy>,
     #[doc = "TimeZone optional input as string. For example: TimeZone = \"Pacific Standard Time\"."]
     #[serde(rename = "timeZone", default, skip_serializing_if = "Option::is_none")]
@@ -6230,7 +6431,12 @@ pub struct IaasVmRecoveryPoint {
     #[serde(rename = "isInstantIlrSessionActive", default, skip_serializing_if = "Option::is_none")]
     pub is_instant_ilr_session_active: Option<bool>,
     #[doc = "Recovery point tier information."]
-    #[serde(rename = "recoveryPointTierDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryPointTierDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_point_tier_details: Vec<RecoveryPointTierInformationV2>,
     #[doc = "Whether VM is with Managed Disks"]
     #[serde(rename = "isManagedVirtualMachine", default, skip_serializing_if = "Option::is_none")]
@@ -6248,7 +6454,11 @@ pub struct IaasVmRecoveryPoint {
     #[serde(rename = "recoveryPointDiskConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub recovery_point_disk_configuration: Option<RecoveryPointDiskConfiguration>,
     #[doc = "Identifies the zone of the VM at the time of backup. Applicable only for zone-pinned Vms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Eligibility of RP to be moved to another tier"]
     #[serde(rename = "recoveryPointMoveReadinessInfo", default, skip_serializing_if = "Option::is_none")]
@@ -6324,7 +6534,12 @@ pub struct IaasVmRestoreRequest {
     #[serde(rename = "encryptionDetails", default, skip_serializing_if = "Option::is_none")]
     pub encryption_details: Option<EncryptionDetails>,
     #[doc = "List of Disk LUNs for partial restore"]
-    #[serde(rename = "restoreDiskLunList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreDiskLunList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_disk_lun_list: Vec<i32>,
     #[doc = "Flag to denote of an Unmanaged disk VM should be restored with Managed disks."]
     #[serde(rename = "restoreWithManagedDisks", default, skip_serializing_if = "Option::is_none")]
@@ -6333,7 +6548,11 @@ pub struct IaasVmRestoreRequest {
     #[serde(rename = "diskEncryptionSetId", default, skip_serializing_if = "Option::is_none")]
     pub disk_encryption_set_id: Option<String>,
     #[doc = "Target zone where the VM and its disks should be restored."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Encapsulates Managed Identity related information"]
     #[serde(rename = "identityInfo", default, skip_serializing_if = "Option::is_none")]
@@ -6472,7 +6691,12 @@ pub struct InquiryInfo {
     #[serde(rename = "errorDetail", default, skip_serializing_if = "Option::is_none")]
     pub error_detail: Option<ErrorDetail>,
     #[doc = "Inquiry Details which will have workload specific details.\r\nFor e.g. - For SQL and oracle this will contain different details."]
-    #[serde(rename = "inquiryDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inquiryDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inquiry_details: Vec<WorkloadInquiryDetails>,
 }
 impl InquiryInfo {
@@ -6502,7 +6726,12 @@ impl InquiryValidation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstantItemRecoveryTarget {
     #[doc = "List of client scripts."]
-    #[serde(rename = "clientScripts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientScripts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_scripts: Vec<ClientScriptForConnect>,
 }
 impl InstantItemRecoveryTarget {
@@ -6827,7 +7056,11 @@ pub struct JobResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResource>,
 }
 impl azure_core::Continuable for JobResourceList {
@@ -6866,7 +7099,12 @@ pub struct KpiResourceHealthDetails {
     #[serde(rename = "resourceHealthStatus", default, skip_serializing_if = "Option::is_none")]
     pub resource_health_status: Option<kpi_resource_health_details::ResourceHealthStatus>,
     #[doc = "Resource Health Status"]
-    #[serde(rename = "resourceHealthDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceHealthDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_health_details: Vec<ResourceHealthDetails>,
 }
 impl KpiResourceHealthDetails {
@@ -6947,7 +7185,12 @@ pub struct ListRecoveryPointsRecommendedForMoveRequest {
     #[serde(rename = "objectType", default, skip_serializing_if = "Option::is_none")]
     pub object_type: Option<String>,
     #[doc = "List of Recovery Points excluded from Move"]
-    #[serde(rename = "excludedRPList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedRPList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_rp_list: Vec<String>,
 }
 impl ListRecoveryPointsRecommendedForMoveRequest {
@@ -7025,7 +7268,11 @@ pub struct MabContainerHealthDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Health Recommended Actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl MabContainerHealthDetails {
@@ -7054,7 +7301,12 @@ pub struct MabContainer {
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
     pub extended_info: Option<MabContainerExtendedInfo>,
     #[doc = "Health details on this mab container."]
-    #[serde(rename = "mabContainerHealthDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mabContainerHealthDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mab_container_health_details: Vec<MabContainerHealthDetails>,
     #[doc = "Health state of mab container."]
     #[serde(rename = "containerHealthState", default, skip_serializing_if = "Option::is_none")]
@@ -7084,7 +7336,12 @@ pub struct MabContainerExtendedInfo {
     #[serde(rename = "backupItemType", default, skip_serializing_if = "Option::is_none")]
     pub backup_item_type: Option<mab_container_extended_info::BackupItemType>,
     #[doc = "List of backup items associated with this container."]
-    #[serde(rename = "backupItems", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupItems",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_items: Vec<String>,
     #[doc = "Backup policy associated with this container."]
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
@@ -7177,7 +7434,11 @@ pub struct MabErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl MabErrorInfo {
@@ -7253,7 +7514,12 @@ pub struct MabJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "The state/actions applicable on jobs like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Name of server protecting the DS."]
     #[serde(rename = "mabServerName", default, skip_serializing_if = "Option::is_none")]
@@ -7265,7 +7531,12 @@ pub struct MabJob {
     #[serde(rename = "workloadType", default, skip_serializing_if = "Option::is_none")]
     pub workload_type: Option<mab_job::WorkloadType>,
     #[doc = "The errors."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<MabErrorInfo>,
     #[doc = "Additional information for the MAB workload-specific job."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -7430,7 +7701,12 @@ pub mod mab_job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MabJobExtendedInfo {
     #[doc = "List of tasks for this job."]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<MabJobTaskDetails>,
     #[doc = "The job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -7502,7 +7778,12 @@ pub struct MonthlyRetentionSchedule {
     #[serde(rename = "retentionScheduleWeekly", default, skip_serializing_if = "Option::is_none")]
     pub retention_schedule_weekly: Option<WeeklyRetentionFormat>,
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
@@ -7639,10 +7920,19 @@ pub mod new_error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<NewErrorResponse>,
         #[doc = "The error additional info."]
-        #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalInfo",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_info: Vec<ErrorAdditionalInfo>,
     }
     impl Error {
@@ -7657,7 +7947,12 @@ pub struct OperationResultInfo {
     #[serde(flatten)]
     pub operation_result_info_base: OperationResultInfoBase,
     #[doc = "List of jobs created by this operation."]
-    #[serde(rename = "jobList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_list: Vec<String>,
 }
 impl OperationResultInfo {
@@ -7820,7 +8115,12 @@ pub struct OperationStatusJobsExtendedInfo {
     #[serde(flatten)]
     pub operation_status_extended_info: OperationStatusExtendedInfo,
     #[doc = "IDs of the jobs created for the protected item."]
-    #[serde(rename = "jobIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_ids: Vec<String>,
     #[doc = "Stores all the failed jobs along with the corresponding error codes."]
     #[serde(rename = "failedJobsError", default, skip_serializing_if = "Option::is_none")]
@@ -8189,7 +8489,12 @@ pub struct PrepareDataMoveRequest {
     #[serde(rename = "dataMoveLevel")]
     pub data_move_level: prepare_data_move_request::DataMoveLevel,
     #[doc = "Source Container ArmIds\r\nThis needs to be populated only if DataMoveLevel is set to container"]
-    #[serde(rename = "sourceContainerArmIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceContainerArmIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_container_arm_ids: Vec<String>,
     #[doc = "Ignore the artifacts which are already moved."]
     #[serde(rename = "ignoreMoved", default, skip_serializing_if = "Option::is_none")]
@@ -8556,7 +8861,11 @@ pub struct ProtectableContainerResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectableContainerResource>,
 }
 impl azure_core::Continuable for ProtectableContainerResourceList {
@@ -8616,7 +8925,12 @@ pub struct ProtectedItem {
     #[serde(rename = "isRehydrate", default, skip_serializing_if = "Option::is_none")]
     pub is_rehydrate: Option<bool>,
     #[doc = "ResourceGuardOperationRequests on which LAC check will be performed"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
     #[doc = "Flag to identify whether datasource is protected in archive"]
     #[serde(rename = "isArchiveEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -9036,7 +9350,11 @@ pub struct ProtectedItemResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectedItemResource>,
 }
 impl azure_core::Continuable for ProtectedItemResourceList {
@@ -9242,7 +9560,11 @@ pub struct ProtectionContainerResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionContainerResource>,
 }
 impl azure_core::Continuable for ProtectionContainerResourceList {
@@ -9583,7 +9905,11 @@ pub struct ProtectionIntentResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionIntentResource>,
 }
 impl azure_core::Continuable for ProtectionIntentResourceList {
@@ -9607,7 +9933,12 @@ pub struct ProtectionPolicy {
     #[serde(rename = "backupManagementType")]
     pub backup_management_type: String,
     #[doc = "ResourceGuard Operation Requests"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
 }
 impl ProtectionPolicy {
@@ -9783,7 +10114,11 @@ pub struct ProtectionPolicyResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionPolicyResource>,
 }
 impl azure_core::Continuable for ProtectionPolicyResourceList {
@@ -9819,10 +10154,20 @@ pub struct RecoveryPointDiskConfiguration {
     #[serde(rename = "numberOfDisksAttachedToVm", default, skip_serializing_if = "Option::is_none")]
     pub number_of_disks_attached_to_vm: Option<i32>,
     #[doc = "Information of disks included in backup"]
-    #[serde(rename = "includedDiskList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedDiskList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_disk_list: Vec<DiskInformation>,
     #[doc = "Information of disks excluded from backup"]
-    #[serde(rename = "excludedDiskList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedDiskList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_disk_list: Vec<DiskInformation>,
 }
 impl RecoveryPointDiskConfiguration {
@@ -9917,7 +10262,11 @@ pub struct RecoveryPointResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryPointResource>,
 }
 impl azure_core::Continuable for RecoveryPointResourceList {
@@ -10122,7 +10471,12 @@ impl ResourceGuardOperationDetail {
 pub struct ResourceGuardProxyBase {
     #[serde(rename = "resourceGuardResourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_guard_resource_id: Option<String>,
-    #[serde(rename = "resourceGuardOperationDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_details: Vec<ResourceGuardOperationDetail>,
     #[serde(rename = "lastUpdatedTime", default, skip_serializing_if = "Option::is_none")]
     pub last_updated_time: Option<String>,
@@ -10152,7 +10506,11 @@ pub struct ResourceGuardProxyBaseResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceGuardProxyBaseResource>,
 }
 impl azure_core::Continuable for ResourceGuardProxyBaseResourceList {
@@ -10179,7 +10537,11 @@ pub struct ResourceHealthDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Health Recommended Actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl ResourceHealthDetails {
@@ -10455,7 +10817,12 @@ impl SchedulePolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityPinBase {
     #[doc = "ResourceGuard Operation Requests"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
 }
 impl SecurityPinBase {
@@ -10507,10 +10874,20 @@ pub struct SimpleSchedulePolicy {
     #[serde(rename = "scheduleRunFrequency", default, skip_serializing_if = "Option::is_none")]
     pub schedule_run_frequency: Option<simple_schedule_policy::ScheduleRunFrequency>,
     #[doc = "List of days of week this schedule has to be run."]
-    #[serde(rename = "scheduleRunDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_days: Vec<String>,
     #[doc = "List of times of day this schedule has to be run."]
-    #[serde(rename = "scheduleRunTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_times: Vec<time::OffsetDateTime>,
     #[serde(rename = "hourlySchedule", default, skip_serializing_if = "Option::is_none")]
     pub hourly_schedule: Option<HourlySchedule>,
@@ -10822,7 +11199,12 @@ pub struct TriggerDataMoveRequest {
     #[serde(rename = "correlationId")]
     pub correlation_id: String,
     #[doc = "Source Container ArmIds"]
-    #[serde(rename = "sourceContainerArmIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceContainerArmIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_container_arm_ids: Vec<String>,
     #[doc = "Pause GC"]
     #[serde(rename = "pauseGC", default, skip_serializing_if = "Option::is_none")]
@@ -10890,7 +11272,12 @@ pub mod trigger_data_move_request {
 #[doc = "Request body of unlock delete API."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UnlockDeleteRequest {
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
     #[serde(rename = "resourceToBeDeleted", default, skip_serializing_if = "Option::is_none")]
     pub resource_to_be_deleted: Option<String>,
@@ -10941,7 +11328,12 @@ impl ValidateOperationRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ValidateOperationResponse {
     #[doc = "Gets the validation result"]
-    #[serde(rename = "validationResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_results: Vec<ErrorDetail>,
 }
 impl ValidateOperationResponse {
@@ -10986,10 +11378,20 @@ pub struct VaultJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<VaultJobErrorInfo>,
     #[doc = "Vault Job for CMK - has CMK specific info."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -11016,7 +11418,11 @@ pub struct VaultJobErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl VaultJobErrorInfo {
@@ -11052,10 +11458,20 @@ impl VaultStorageConfigOperationResultResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeeklyRetentionFormat {
     #[doc = "List of days of the week."]
-    #[serde(rename = "daysOfTheWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_week: Vec<String>,
     #[doc = "List of weeks of month."]
-    #[serde(rename = "weeksOfTheMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weeksOfTheMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weeks_of_the_month: Vec<String>,
 }
 impl WeeklyRetentionFormat {
@@ -11067,10 +11483,20 @@ impl WeeklyRetentionFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeeklyRetentionSchedule {
     #[doc = "List of days of week for weekly retention policy."]
-    #[serde(rename = "daysOfTheWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_week: Vec<String>,
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
@@ -11083,10 +11509,20 @@ impl WeeklyRetentionSchedule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeeklySchedule {
-    #[serde(rename = "scheduleRunDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_days: Vec<String>,
     #[doc = "List of times of day this schedule has to be run."]
-    #[serde(rename = "scheduleRunTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_times: Vec<time::OffsetDateTime>,
 }
 impl WeeklySchedule {
@@ -11208,7 +11644,11 @@ pub struct WorkloadItemResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadItemResource>,
 }
 impl azure_core::Continuable for WorkloadItemResourceList {
@@ -11318,7 +11758,11 @@ pub struct WorkloadProtectableItemResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadProtectableItemResource>,
 }
 impl azure_core::Continuable for WorkloadProtectableItemResourceList {
@@ -11339,7 +11783,12 @@ pub struct YearlyRetentionSchedule {
     #[serde(rename = "retentionScheduleFormatType", default, skip_serializing_if = "Option::is_none")]
     pub retention_schedule_format_type: Option<yearly_retention_schedule::RetentionScheduleFormatType>,
     #[doc = "List of months of year of yearly retention policy."]
-    #[serde(rename = "monthsOfYear", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthsOfYear",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub months_of_year: Vec<String>,
     #[doc = "Daily retention format."]
     #[serde(rename = "retentionScheduleDaily", default, skip_serializing_if = "Option::is_none")]
@@ -11348,7 +11797,12 @@ pub struct YearlyRetentionSchedule {
     #[serde(rename = "retentionScheduleWeekly", default, skip_serializing_if = "Option::is_none")]
     pub retention_schedule_weekly: Option<WeeklyRetentionFormat>,
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/recoveryservicesbackup/src/package_2022_02/models.rs b/services/mgmt/recoveryservicesbackup/src/package_2022_02/models.rs
index d6bb35a002..b7831da172 100644
--- a/services/mgmt/recoveryservicesbackup/src/package_2022_02/models.rs
+++ b/services/mgmt/recoveryservicesbackup/src/package_2022_02/models.rs
@@ -290,7 +290,12 @@ pub struct AzureFileShareRestoreRequest {
     #[serde(rename = "restoreRequestType", default, skip_serializing_if = "Option::is_none")]
     pub restore_request_type: Option<azure_file_share_restore_request::RestoreRequestType>,
     #[doc = "List of Source Files/Folders(which need to recover) and TargetFolderPath details"]
-    #[serde(rename = "restoreFileSpecs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreFileSpecs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_file_specs: Vec<RestoreFileSpecs>,
     #[doc = "Target Azure File Share Info."]
     #[serde(rename = "targetDetails", default, skip_serializing_if = "Option::is_none")]
@@ -634,7 +639,11 @@ pub struct AzureIaaSvmErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl AzureIaaSvmErrorInfo {
@@ -662,10 +671,20 @@ pub struct AzureIaaSvmJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureIaaSvmErrorInfo>,
     #[doc = "Specifies whether the backup item is a Classic or an Azure Resource Manager VM."]
     #[serde(rename = "virtualMachineVersion", default, skip_serializing_if = "Option::is_none")]
@@ -698,7 +717,12 @@ impl AzureIaaSvmJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureIaaSvmJobExtendedInfo {
     #[doc = "List of tasks associated with this job."]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<AzureIaaSvmJobTaskDetails>,
     #[doc = "Job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -760,7 +784,12 @@ pub struct AzureIaaSvmJobV2 {
     #[serde(flatten)]
     pub job: Job,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Container name of the entity on which the current job is executing."]
     #[serde(rename = "containerName", default, skip_serializing_if = "Option::is_none")]
@@ -769,7 +798,12 @@ pub struct AzureIaaSvmJobV2 {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureIaaSvmErrorInfo>,
     #[doc = "Specifies whether the backup item is a Classic or an Azure Resource Manager VM."]
     #[serde(rename = "virtualMachineVersion", default, skip_serializing_if = "Option::is_none")]
@@ -812,7 +846,12 @@ pub struct AzureIaaSvmProtectedItem {
     #[serde(rename = "healthStatus", default, skip_serializing_if = "Option::is_none")]
     pub health_status: Option<azure_iaa_svm_protected_item::HealthStatus>,
     #[doc = "Health details on this backup item."]
-    #[serde(rename = "healthDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_details: Vec<AzureIaaSvmHealthDetails>,
     #[doc = "Health details of different KPIs"]
     #[serde(rename = "kpisHealths", default, skip_serializing_if = "Option::is_none")]
@@ -1278,7 +1317,11 @@ pub struct AzureStorageErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl AzureStorageErrorInfo {
@@ -1295,10 +1338,20 @@ pub struct AzureStorageJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureStorageErrorInfo>,
     #[doc = "Specifies friendly name of the storage account."]
     #[serde(rename = "storageAccountName", default, skip_serializing_if = "Option::is_none")]
@@ -1331,7 +1384,12 @@ impl AzureStorageJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureStorageJobExtendedInfo {
     #[doc = "List of tasks for this job"]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<AzureStorageJobTaskDetails>,
     #[doc = "Job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -1785,7 +1843,12 @@ pub struct AzureVmWorkloadProtectionPolicy {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub settings: Option<Settings>,
     #[doc = "List of sub-protection policies which includes schedule and retention"]
-    #[serde(rename = "subProtectionPolicy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subProtectionPolicy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_protection_policy: Vec<SubProtectionPolicy>,
     #[doc = "Fix the policy inconsistency"]
     #[serde(rename = "makePolicyConsistent", default, skip_serializing_if = "Option::is_none")]
@@ -2052,7 +2115,12 @@ pub struct AzureVmWorkloadSqlInstanceWorkloadItem {
     #[serde(flatten)]
     pub azure_vm_workload_item: AzureVmWorkloadItem,
     #[doc = "Data Directory Paths for default directories"]
-    #[serde(rename = "dataDirectoryPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDirectoryPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_directory_paths: Vec<SqlDataDirectory>,
 }
 impl AzureVmWorkloadSqlInstanceWorkloadItem {
@@ -2314,7 +2382,12 @@ pub struct AzureWorkloadContainerExtendedInfo {
     #[serde(rename = "inquiryInfo", default, skip_serializing_if = "Option::is_none")]
     pub inquiry_info: Option<InquiryInfo>,
     #[doc = "List of the nodes in case of distributed container."]
-    #[serde(rename = "nodesList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nodesList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes_list: Vec<DistributedNodesInfo>,
 }
 impl AzureWorkloadContainerExtendedInfo {
@@ -2335,7 +2408,11 @@ pub struct AzureWorkloadErrorInfo {
     #[serde(rename = "errorTitle", default, skip_serializing_if = "Option::is_none")]
     pub error_title: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
     #[doc = "Additional details for above error code."]
     #[serde(rename = "additionalDetails", default, skip_serializing_if = "Option::is_none")]
@@ -2358,10 +2435,20 @@ pub struct AzureWorkloadJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureWorkloadErrorInfo>,
     #[doc = "Azure VM workload-specific additional information for job."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -2383,7 +2470,12 @@ impl AzureWorkloadJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureWorkloadJobExtendedInfo {
     #[doc = "List of tasks for this job"]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<AzureWorkloadJobTaskDetails>,
     #[doc = "Job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -2418,7 +2510,12 @@ pub struct AzureWorkloadPointInTimeRecoveryPoint {
     #[serde(flatten)]
     pub azure_workload_recovery_point: AzureWorkloadRecoveryPoint,
     #[doc = "List of log ranges"]
-    #[serde(rename = "timeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_ranges: Vec<PointInTimeRange>,
 }
 impl AzureWorkloadPointInTimeRecoveryPoint {
@@ -2458,7 +2555,12 @@ pub struct AzureWorkloadRecoveryPoint {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<azure_workload_recovery_point::Type>,
     #[doc = "Recovery point tier information."]
-    #[serde(rename = "recoveryPointTierDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryPointTierDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_point_tier_details: Vec<RecoveryPointTierInformationV2>,
     #[doc = "Eligibility of RP to be moved to another tier"]
     #[serde(rename = "recoveryPointMoveReadinessInfo", default, skip_serializing_if = "Option::is_none")]
@@ -2812,7 +2914,12 @@ pub struct AzureWorkloadSqlPointInTimeRecoveryPoint {
     #[serde(flatten)]
     pub azure_workload_sql_recovery_point: AzureWorkloadSqlRecoveryPoint,
     #[doc = "List of log ranges"]
-    #[serde(rename = "timeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_ranges: Vec<PointInTimeRange>,
 }
 impl AzureWorkloadSqlPointInTimeRecoveryPoint {
@@ -2881,7 +2988,12 @@ pub struct AzureWorkloadSqlRecoveryPointExtendedInfo {
     #[serde(rename = "dataDirectoryTimeInUTC", default, with = "azure_core::date::rfc3339::option")]
     pub data_directory_time_in_utc: Option<time::OffsetDateTime>,
     #[doc = "List of data directory paths during restore operation."]
-    #[serde(rename = "dataDirectoryPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDirectoryPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_directory_paths: Vec<SqlDataDirectory>,
 }
 impl AzureWorkloadSqlRecoveryPointExtendedInfo {
@@ -2901,7 +3013,12 @@ pub struct AzureWorkloadSqlRestoreRequest {
     #[serde(rename = "isNonRecoverable", default, skip_serializing_if = "Option::is_none")]
     pub is_non_recoverable: Option<bool>,
     #[doc = "Data directory details"]
-    #[serde(rename = "alternateDirectoryPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateDirectoryPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_directory_paths: Vec<SqlDataDirectoryMapping>,
 }
 impl AzureWorkloadSqlRestoreRequest {
@@ -4107,7 +4224,11 @@ pub struct BackupEngineBaseResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupEngineBaseResource>,
 }
 impl azure_core::Continuable for BackupEngineBaseResourceList {
@@ -4233,7 +4354,11 @@ pub mod backup_management_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupManagementUsageList {
     #[doc = "The list of backup management usages for the given vault."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupManagementUsage>,
 }
 impl azure_core::Continuable for BackupManagementUsageList {
@@ -4730,7 +4855,12 @@ pub struct BackupResourceVaultConfig {
     #[serde(rename = "softDeleteFeatureState", default, skip_serializing_if = "Option::is_none")]
     pub soft_delete_feature_state: Option<backup_resource_vault_config::SoftDeleteFeatureState>,
     #[doc = "ResourceGuard Operation Requests"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
     #[doc = "Is soft delete feature state editable"]
     #[serde(rename = "isSoftDeleteFeatureStateEditable", default, skip_serializing_if = "Option::is_none")]
@@ -5227,7 +5357,12 @@ impl ClientDiscoveryForProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryForServiceSpecification {
     #[doc = "List of log specifications of this operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<ClientDiscoveryForLogSpecification>,
 }
 impl ClientDiscoveryForServiceSpecification {
@@ -5239,7 +5374,11 @@ impl ClientDiscoveryForServiceSpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryResponse {
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientDiscoveryValueForSingleApi>,
     #[doc = "Link to the next chunk of Response."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5332,10 +5471,19 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl CloudErrorBody {
@@ -5509,7 +5657,12 @@ impl DpmProtectedItemExtendedInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DailyRetentionFormat {
     #[doc = "List of days of the month."]
-    #[serde(rename = "daysOfTheMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_month: Vec<Day>,
 }
 impl DailyRetentionFormat {
@@ -5521,7 +5674,12 @@ impl DailyRetentionFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DailyRetentionSchedule {
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
@@ -5535,7 +5693,12 @@ impl DailyRetentionSchedule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DailySchedule {
     #[doc = "List of times of day this schedule has to be run."]
-    #[serde(rename = "scheduleRunTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_times: Vec<time::OffsetDateTime>,
 }
 impl DailySchedule {
@@ -5561,7 +5724,12 @@ impl Day {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskExclusionProperties {
     #[doc = "List of Disks' Logical Unit Numbers (LUN) to be used for VM Protection."]
-    #[serde(rename = "diskLunList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskLunList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_lun_list: Vec<i32>,
     #[doc = "Flag to indicate whether DiskLunList is to be included/ excluded from backup."]
     #[serde(rename = "isInclusionList", default, skip_serializing_if = "Option::is_none")]
@@ -5632,7 +5800,12 @@ pub struct DpmContainer {
     #[serde(rename = "dpmAgentVersion", default, skip_serializing_if = "Option::is_none")]
     pub dpm_agent_version: Option<String>,
     #[doc = "List of BackupEngines protecting the container"]
-    #[serde(rename = "dpmServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dpmServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dpm_servers: Vec<String>,
     #[doc = "To check if upgrade available"]
     #[serde(rename = "upgradeAvailable", default, skip_serializing_if = "Option::is_none")]
@@ -5666,7 +5839,11 @@ pub struct DpmErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl DpmErrorInfo {
@@ -5695,10 +5872,20 @@ pub struct DpmJob {
     #[serde(rename = "workloadType", default, skip_serializing_if = "Option::is_none")]
     pub workload_type: Option<String>,
     #[doc = "The state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "The errors."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<DpmErrorInfo>,
     #[doc = "Additional information on the DPM workload-specific job."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -5723,7 +5910,12 @@ impl DpmJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DpmJobExtendedInfo {
     #[doc = "List of tasks associated with this job."]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<DpmJobTaskDetails>,
     #[doc = "The job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -5810,7 +6002,11 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "List of recommendation strings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl ErrorDetail {
@@ -6004,7 +6200,12 @@ pub struct GenericProtectionPolicy {
     #[serde(flatten)]
     pub protection_policy: ProtectionPolicy,
     #[doc = "List of sub-protection policies which includes schedule and retention"]
-    #[serde(rename = "subProtectionPolicy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subProtectionPolicy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_protection_policy: Vec<SubProtectionPolicy>,
     #[doc = "TimeZone optional input as string. For example: TimeZone = \"Pacific Standard Time\"."]
     #[serde(rename = "timeZone", default, skip_serializing_if = "Option::is_none")]
@@ -6230,7 +6431,12 @@ pub struct IaasVmRecoveryPoint {
     #[serde(rename = "isInstantIlrSessionActive", default, skip_serializing_if = "Option::is_none")]
     pub is_instant_ilr_session_active: Option<bool>,
     #[doc = "Recovery point tier information."]
-    #[serde(rename = "recoveryPointTierDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryPointTierDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_point_tier_details: Vec<RecoveryPointTierInformationV2>,
     #[doc = "Whether VM is with Managed Disks"]
     #[serde(rename = "isManagedVirtualMachine", default, skip_serializing_if = "Option::is_none")]
@@ -6248,7 +6454,11 @@ pub struct IaasVmRecoveryPoint {
     #[serde(rename = "recoveryPointDiskConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub recovery_point_disk_configuration: Option<RecoveryPointDiskConfiguration>,
     #[doc = "Identifies the zone of the VM at the time of backup. Applicable only for zone-pinned Vms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Eligibility of RP to be moved to another tier"]
     #[serde(rename = "recoveryPointMoveReadinessInfo", default, skip_serializing_if = "Option::is_none")]
@@ -6324,7 +6534,12 @@ pub struct IaasVmRestoreRequest {
     #[serde(rename = "encryptionDetails", default, skip_serializing_if = "Option::is_none")]
     pub encryption_details: Option<EncryptionDetails>,
     #[doc = "List of Disk LUNs for partial restore"]
-    #[serde(rename = "restoreDiskLunList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreDiskLunList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_disk_lun_list: Vec<i32>,
     #[doc = "Flag to denote of an Unmanaged disk VM should be restored with Managed disks."]
     #[serde(rename = "restoreWithManagedDisks", default, skip_serializing_if = "Option::is_none")]
@@ -6333,7 +6548,11 @@ pub struct IaasVmRestoreRequest {
     #[serde(rename = "diskEncryptionSetId", default, skip_serializing_if = "Option::is_none")]
     pub disk_encryption_set_id: Option<String>,
     #[doc = "Target zone where the VM and its disks should be restored."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Encapsulates Managed Identity related information"]
     #[serde(rename = "identityInfo", default, skip_serializing_if = "Option::is_none")]
@@ -6472,7 +6691,12 @@ pub struct InquiryInfo {
     #[serde(rename = "errorDetail", default, skip_serializing_if = "Option::is_none")]
     pub error_detail: Option<ErrorDetail>,
     #[doc = "Inquiry Details which will have workload specific details.\r\nFor e.g. - For SQL and oracle this will contain different details."]
-    #[serde(rename = "inquiryDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inquiryDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inquiry_details: Vec<WorkloadInquiryDetails>,
 }
 impl InquiryInfo {
@@ -6502,7 +6726,12 @@ impl InquiryValidation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstantItemRecoveryTarget {
     #[doc = "List of client scripts."]
-    #[serde(rename = "clientScripts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientScripts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_scripts: Vec<ClientScriptForConnect>,
 }
 impl InstantItemRecoveryTarget {
@@ -6827,7 +7056,11 @@ pub struct JobResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResource>,
 }
 impl azure_core::Continuable for JobResourceList {
@@ -6866,7 +7099,12 @@ pub struct KpiResourceHealthDetails {
     #[serde(rename = "resourceHealthStatus", default, skip_serializing_if = "Option::is_none")]
     pub resource_health_status: Option<kpi_resource_health_details::ResourceHealthStatus>,
     #[doc = "Resource Health Status"]
-    #[serde(rename = "resourceHealthDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceHealthDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_health_details: Vec<ResourceHealthDetails>,
 }
 impl KpiResourceHealthDetails {
@@ -6947,7 +7185,12 @@ pub struct ListRecoveryPointsRecommendedForMoveRequest {
     #[serde(rename = "objectType", default, skip_serializing_if = "Option::is_none")]
     pub object_type: Option<String>,
     #[doc = "List of Recovery Points excluded from Move"]
-    #[serde(rename = "excludedRPList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedRPList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_rp_list: Vec<String>,
 }
 impl ListRecoveryPointsRecommendedForMoveRequest {
@@ -7025,7 +7268,11 @@ pub struct MabContainerHealthDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Health Recommended Actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl MabContainerHealthDetails {
@@ -7054,7 +7301,12 @@ pub struct MabContainer {
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
     pub extended_info: Option<MabContainerExtendedInfo>,
     #[doc = "Health details on this mab container."]
-    #[serde(rename = "mabContainerHealthDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mabContainerHealthDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mab_container_health_details: Vec<MabContainerHealthDetails>,
     #[doc = "Health state of mab container."]
     #[serde(rename = "containerHealthState", default, skip_serializing_if = "Option::is_none")]
@@ -7084,7 +7336,12 @@ pub struct MabContainerExtendedInfo {
     #[serde(rename = "backupItemType", default, skip_serializing_if = "Option::is_none")]
     pub backup_item_type: Option<mab_container_extended_info::BackupItemType>,
     #[doc = "List of backup items associated with this container."]
-    #[serde(rename = "backupItems", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupItems",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_items: Vec<String>,
     #[doc = "Backup policy associated with this container."]
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
@@ -7177,7 +7434,11 @@ pub struct MabErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl MabErrorInfo {
@@ -7253,7 +7514,12 @@ pub struct MabJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "The state/actions applicable on jobs like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Name of server protecting the DS."]
     #[serde(rename = "mabServerName", default, skip_serializing_if = "Option::is_none")]
@@ -7265,7 +7531,12 @@ pub struct MabJob {
     #[serde(rename = "workloadType", default, skip_serializing_if = "Option::is_none")]
     pub workload_type: Option<mab_job::WorkloadType>,
     #[doc = "The errors."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<MabErrorInfo>,
     #[doc = "Additional information for the MAB workload-specific job."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -7430,7 +7701,12 @@ pub mod mab_job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MabJobExtendedInfo {
     #[doc = "List of tasks for this job."]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<MabJobTaskDetails>,
     #[doc = "The job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -7502,7 +7778,12 @@ pub struct MonthlyRetentionSchedule {
     #[serde(rename = "retentionScheduleWeekly", default, skip_serializing_if = "Option::is_none")]
     pub retention_schedule_weekly: Option<WeeklyRetentionFormat>,
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
@@ -7639,10 +7920,19 @@ pub mod new_error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<NewErrorResponse>,
         #[doc = "The error additional info."]
-        #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalInfo",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_info: Vec<ErrorAdditionalInfo>,
     }
     impl Error {
@@ -7657,7 +7947,12 @@ pub struct OperationResultInfo {
     #[serde(flatten)]
     pub operation_result_info_base: OperationResultInfoBase,
     #[doc = "List of jobs created by this operation."]
-    #[serde(rename = "jobList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_list: Vec<String>,
 }
 impl OperationResultInfo {
@@ -7820,7 +8115,12 @@ pub struct OperationStatusJobsExtendedInfo {
     #[serde(flatten)]
     pub operation_status_extended_info: OperationStatusExtendedInfo,
     #[doc = "IDs of the jobs created for the protected item."]
-    #[serde(rename = "jobIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_ids: Vec<String>,
     #[doc = "Stores all the failed jobs along with the corresponding error codes."]
     #[serde(rename = "failedJobsError", default, skip_serializing_if = "Option::is_none")]
@@ -8189,7 +8489,12 @@ pub struct PrepareDataMoveRequest {
     #[serde(rename = "dataMoveLevel")]
     pub data_move_level: prepare_data_move_request::DataMoveLevel,
     #[doc = "Source Container ArmIds\r\nThis needs to be populated only if DataMoveLevel is set to container"]
-    #[serde(rename = "sourceContainerArmIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceContainerArmIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_container_arm_ids: Vec<String>,
     #[doc = "Ignore the artifacts which are already moved."]
     #[serde(rename = "ignoreMoved", default, skip_serializing_if = "Option::is_none")]
@@ -8556,7 +8861,11 @@ pub struct ProtectableContainerResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectableContainerResource>,
 }
 impl azure_core::Continuable for ProtectableContainerResourceList {
@@ -8616,7 +8925,12 @@ pub struct ProtectedItem {
     #[serde(rename = "isRehydrate", default, skip_serializing_if = "Option::is_none")]
     pub is_rehydrate: Option<bool>,
     #[doc = "ResourceGuardOperationRequests on which LAC check will be performed"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
     #[doc = "Flag to identify whether datasource is protected in archive"]
     #[serde(rename = "isArchiveEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -9036,7 +9350,11 @@ pub struct ProtectedItemResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectedItemResource>,
 }
 impl azure_core::Continuable for ProtectedItemResourceList {
@@ -9242,7 +9560,11 @@ pub struct ProtectionContainerResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionContainerResource>,
 }
 impl azure_core::Continuable for ProtectionContainerResourceList {
@@ -9583,7 +9905,11 @@ pub struct ProtectionIntentResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionIntentResource>,
 }
 impl azure_core::Continuable for ProtectionIntentResourceList {
@@ -9607,7 +9933,12 @@ pub struct ProtectionPolicy {
     #[serde(rename = "backupManagementType")]
     pub backup_management_type: String,
     #[doc = "ResourceGuard Operation Requests"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
 }
 impl ProtectionPolicy {
@@ -9783,7 +10114,11 @@ pub struct ProtectionPolicyResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionPolicyResource>,
 }
 impl azure_core::Continuable for ProtectionPolicyResourceList {
@@ -9819,10 +10154,20 @@ pub struct RecoveryPointDiskConfiguration {
     #[serde(rename = "numberOfDisksAttachedToVm", default, skip_serializing_if = "Option::is_none")]
     pub number_of_disks_attached_to_vm: Option<i32>,
     #[doc = "Information of disks included in backup"]
-    #[serde(rename = "includedDiskList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedDiskList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_disk_list: Vec<DiskInformation>,
     #[doc = "Information of disks excluded from backup"]
-    #[serde(rename = "excludedDiskList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedDiskList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_disk_list: Vec<DiskInformation>,
 }
 impl RecoveryPointDiskConfiguration {
@@ -9917,7 +10262,11 @@ pub struct RecoveryPointResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryPointResource>,
 }
 impl azure_core::Continuable for RecoveryPointResourceList {
@@ -10122,7 +10471,12 @@ impl ResourceGuardOperationDetail {
 pub struct ResourceGuardProxyBase {
     #[serde(rename = "resourceGuardResourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_guard_resource_id: Option<String>,
-    #[serde(rename = "resourceGuardOperationDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_details: Vec<ResourceGuardOperationDetail>,
     #[serde(rename = "lastUpdatedTime", default, skip_serializing_if = "Option::is_none")]
     pub last_updated_time: Option<String>,
@@ -10152,7 +10506,11 @@ pub struct ResourceGuardProxyBaseResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceGuardProxyBaseResource>,
 }
 impl azure_core::Continuable for ResourceGuardProxyBaseResourceList {
@@ -10179,7 +10537,11 @@ pub struct ResourceHealthDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Health Recommended Actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl ResourceHealthDetails {
@@ -10455,7 +10817,12 @@ impl SchedulePolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityPinBase {
     #[doc = "ResourceGuard Operation Requests"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
 }
 impl SecurityPinBase {
@@ -10507,10 +10874,20 @@ pub struct SimpleSchedulePolicy {
     #[serde(rename = "scheduleRunFrequency", default, skip_serializing_if = "Option::is_none")]
     pub schedule_run_frequency: Option<simple_schedule_policy::ScheduleRunFrequency>,
     #[doc = "List of days of week this schedule has to be run."]
-    #[serde(rename = "scheduleRunDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_days: Vec<String>,
     #[doc = "List of times of day this schedule has to be run."]
-    #[serde(rename = "scheduleRunTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_times: Vec<time::OffsetDateTime>,
     #[serde(rename = "hourlySchedule", default, skip_serializing_if = "Option::is_none")]
     pub hourly_schedule: Option<HourlySchedule>,
@@ -10822,7 +11199,12 @@ pub struct TriggerDataMoveRequest {
     #[serde(rename = "correlationId")]
     pub correlation_id: String,
     #[doc = "Source Container ArmIds"]
-    #[serde(rename = "sourceContainerArmIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceContainerArmIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_container_arm_ids: Vec<String>,
     #[doc = "Pause GC"]
     #[serde(rename = "pauseGC", default, skip_serializing_if = "Option::is_none")]
@@ -10890,7 +11272,12 @@ pub mod trigger_data_move_request {
 #[doc = "Request body of unlock delete API."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UnlockDeleteRequest {
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
     #[serde(rename = "resourceToBeDeleted", default, skip_serializing_if = "Option::is_none")]
     pub resource_to_be_deleted: Option<String>,
@@ -10941,7 +11328,12 @@ impl ValidateOperationRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ValidateOperationResponse {
     #[doc = "Gets the validation result"]
-    #[serde(rename = "validationResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_results: Vec<ErrorDetail>,
 }
 impl ValidateOperationResponse {
@@ -10986,10 +11378,20 @@ pub struct VaultJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<VaultJobErrorInfo>,
     #[doc = "Vault Job for CMK - has CMK specific info."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -11016,7 +11418,11 @@ pub struct VaultJobErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl VaultJobErrorInfo {
@@ -11052,10 +11458,20 @@ impl VaultStorageConfigOperationResultResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeeklyRetentionFormat {
     #[doc = "List of days of the week."]
-    #[serde(rename = "daysOfTheWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_week: Vec<String>,
     #[doc = "List of weeks of month."]
-    #[serde(rename = "weeksOfTheMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weeksOfTheMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weeks_of_the_month: Vec<String>,
 }
 impl WeeklyRetentionFormat {
@@ -11067,10 +11483,20 @@ impl WeeklyRetentionFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeeklyRetentionSchedule {
     #[doc = "List of days of week for weekly retention policy."]
-    #[serde(rename = "daysOfTheWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_week: Vec<String>,
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
@@ -11083,10 +11509,20 @@ impl WeeklyRetentionSchedule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeeklySchedule {
-    #[serde(rename = "scheduleRunDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_days: Vec<String>,
     #[doc = "List of times of day this schedule has to be run."]
-    #[serde(rename = "scheduleRunTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_times: Vec<time::OffsetDateTime>,
 }
 impl WeeklySchedule {
@@ -11208,7 +11644,11 @@ pub struct WorkloadItemResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadItemResource>,
 }
 impl azure_core::Continuable for WorkloadItemResourceList {
@@ -11318,7 +11758,11 @@ pub struct WorkloadProtectableItemResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadProtectableItemResource>,
 }
 impl azure_core::Continuable for WorkloadProtectableItemResourceList {
@@ -11339,7 +11783,12 @@ pub struct YearlyRetentionSchedule {
     #[serde(rename = "retentionScheduleFormatType", default, skip_serializing_if = "Option::is_none")]
     pub retention_schedule_format_type: Option<yearly_retention_schedule::RetentionScheduleFormatType>,
     #[doc = "List of months of year of yearly retention policy."]
-    #[serde(rename = "monthsOfYear", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthsOfYear",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub months_of_year: Vec<String>,
     #[doc = "Daily retention format."]
     #[serde(rename = "retentionScheduleDaily", default, skip_serializing_if = "Option::is_none")]
@@ -11348,7 +11797,12 @@ pub struct YearlyRetentionSchedule {
     #[serde(rename = "retentionScheduleWeekly", default, skip_serializing_if = "Option::is_none")]
     pub retention_schedule_weekly: Option<WeeklyRetentionFormat>,
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/recoveryservicesbackup/src/package_2022_03/models.rs b/services/mgmt/recoveryservicesbackup/src/package_2022_03/models.rs
index d6bb35a002..b7831da172 100644
--- a/services/mgmt/recoveryservicesbackup/src/package_2022_03/models.rs
+++ b/services/mgmt/recoveryservicesbackup/src/package_2022_03/models.rs
@@ -290,7 +290,12 @@ pub struct AzureFileShareRestoreRequest {
     #[serde(rename = "restoreRequestType", default, skip_serializing_if = "Option::is_none")]
     pub restore_request_type: Option<azure_file_share_restore_request::RestoreRequestType>,
     #[doc = "List of Source Files/Folders(which need to recover) and TargetFolderPath details"]
-    #[serde(rename = "restoreFileSpecs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreFileSpecs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_file_specs: Vec<RestoreFileSpecs>,
     #[doc = "Target Azure File Share Info."]
     #[serde(rename = "targetDetails", default, skip_serializing_if = "Option::is_none")]
@@ -634,7 +639,11 @@ pub struct AzureIaaSvmErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl AzureIaaSvmErrorInfo {
@@ -662,10 +671,20 @@ pub struct AzureIaaSvmJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureIaaSvmErrorInfo>,
     #[doc = "Specifies whether the backup item is a Classic or an Azure Resource Manager VM."]
     #[serde(rename = "virtualMachineVersion", default, skip_serializing_if = "Option::is_none")]
@@ -698,7 +717,12 @@ impl AzureIaaSvmJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureIaaSvmJobExtendedInfo {
     #[doc = "List of tasks associated with this job."]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<AzureIaaSvmJobTaskDetails>,
     #[doc = "Job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -760,7 +784,12 @@ pub struct AzureIaaSvmJobV2 {
     #[serde(flatten)]
     pub job: Job,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Container name of the entity on which the current job is executing."]
     #[serde(rename = "containerName", default, skip_serializing_if = "Option::is_none")]
@@ -769,7 +798,12 @@ pub struct AzureIaaSvmJobV2 {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureIaaSvmErrorInfo>,
     #[doc = "Specifies whether the backup item is a Classic or an Azure Resource Manager VM."]
     #[serde(rename = "virtualMachineVersion", default, skip_serializing_if = "Option::is_none")]
@@ -812,7 +846,12 @@ pub struct AzureIaaSvmProtectedItem {
     #[serde(rename = "healthStatus", default, skip_serializing_if = "Option::is_none")]
     pub health_status: Option<azure_iaa_svm_protected_item::HealthStatus>,
     #[doc = "Health details on this backup item."]
-    #[serde(rename = "healthDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_details: Vec<AzureIaaSvmHealthDetails>,
     #[doc = "Health details of different KPIs"]
     #[serde(rename = "kpisHealths", default, skip_serializing_if = "Option::is_none")]
@@ -1278,7 +1317,11 @@ pub struct AzureStorageErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl AzureStorageErrorInfo {
@@ -1295,10 +1338,20 @@ pub struct AzureStorageJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureStorageErrorInfo>,
     #[doc = "Specifies friendly name of the storage account."]
     #[serde(rename = "storageAccountName", default, skip_serializing_if = "Option::is_none")]
@@ -1331,7 +1384,12 @@ impl AzureStorageJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureStorageJobExtendedInfo {
     #[doc = "List of tasks for this job"]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<AzureStorageJobTaskDetails>,
     #[doc = "Job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -1785,7 +1843,12 @@ pub struct AzureVmWorkloadProtectionPolicy {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub settings: Option<Settings>,
     #[doc = "List of sub-protection policies which includes schedule and retention"]
-    #[serde(rename = "subProtectionPolicy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subProtectionPolicy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_protection_policy: Vec<SubProtectionPolicy>,
     #[doc = "Fix the policy inconsistency"]
     #[serde(rename = "makePolicyConsistent", default, skip_serializing_if = "Option::is_none")]
@@ -2052,7 +2115,12 @@ pub struct AzureVmWorkloadSqlInstanceWorkloadItem {
     #[serde(flatten)]
     pub azure_vm_workload_item: AzureVmWorkloadItem,
     #[doc = "Data Directory Paths for default directories"]
-    #[serde(rename = "dataDirectoryPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDirectoryPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_directory_paths: Vec<SqlDataDirectory>,
 }
 impl AzureVmWorkloadSqlInstanceWorkloadItem {
@@ -2314,7 +2382,12 @@ pub struct AzureWorkloadContainerExtendedInfo {
     #[serde(rename = "inquiryInfo", default, skip_serializing_if = "Option::is_none")]
     pub inquiry_info: Option<InquiryInfo>,
     #[doc = "List of the nodes in case of distributed container."]
-    #[serde(rename = "nodesList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nodesList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes_list: Vec<DistributedNodesInfo>,
 }
 impl AzureWorkloadContainerExtendedInfo {
@@ -2335,7 +2408,11 @@ pub struct AzureWorkloadErrorInfo {
     #[serde(rename = "errorTitle", default, skip_serializing_if = "Option::is_none")]
     pub error_title: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
     #[doc = "Additional details for above error code."]
     #[serde(rename = "additionalDetails", default, skip_serializing_if = "Option::is_none")]
@@ -2358,10 +2435,20 @@ pub struct AzureWorkloadJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureWorkloadErrorInfo>,
     #[doc = "Azure VM workload-specific additional information for job."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -2383,7 +2470,12 @@ impl AzureWorkloadJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureWorkloadJobExtendedInfo {
     #[doc = "List of tasks for this job"]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<AzureWorkloadJobTaskDetails>,
     #[doc = "Job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -2418,7 +2510,12 @@ pub struct AzureWorkloadPointInTimeRecoveryPoint {
     #[serde(flatten)]
     pub azure_workload_recovery_point: AzureWorkloadRecoveryPoint,
     #[doc = "List of log ranges"]
-    #[serde(rename = "timeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_ranges: Vec<PointInTimeRange>,
 }
 impl AzureWorkloadPointInTimeRecoveryPoint {
@@ -2458,7 +2555,12 @@ pub struct AzureWorkloadRecoveryPoint {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<azure_workload_recovery_point::Type>,
     #[doc = "Recovery point tier information."]
-    #[serde(rename = "recoveryPointTierDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryPointTierDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_point_tier_details: Vec<RecoveryPointTierInformationV2>,
     #[doc = "Eligibility of RP to be moved to another tier"]
     #[serde(rename = "recoveryPointMoveReadinessInfo", default, skip_serializing_if = "Option::is_none")]
@@ -2812,7 +2914,12 @@ pub struct AzureWorkloadSqlPointInTimeRecoveryPoint {
     #[serde(flatten)]
     pub azure_workload_sql_recovery_point: AzureWorkloadSqlRecoveryPoint,
     #[doc = "List of log ranges"]
-    #[serde(rename = "timeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_ranges: Vec<PointInTimeRange>,
 }
 impl AzureWorkloadSqlPointInTimeRecoveryPoint {
@@ -2881,7 +2988,12 @@ pub struct AzureWorkloadSqlRecoveryPointExtendedInfo {
     #[serde(rename = "dataDirectoryTimeInUTC", default, with = "azure_core::date::rfc3339::option")]
     pub data_directory_time_in_utc: Option<time::OffsetDateTime>,
     #[doc = "List of data directory paths during restore operation."]
-    #[serde(rename = "dataDirectoryPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDirectoryPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_directory_paths: Vec<SqlDataDirectory>,
 }
 impl AzureWorkloadSqlRecoveryPointExtendedInfo {
@@ -2901,7 +3013,12 @@ pub struct AzureWorkloadSqlRestoreRequest {
     #[serde(rename = "isNonRecoverable", default, skip_serializing_if = "Option::is_none")]
     pub is_non_recoverable: Option<bool>,
     #[doc = "Data directory details"]
-    #[serde(rename = "alternateDirectoryPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateDirectoryPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_directory_paths: Vec<SqlDataDirectoryMapping>,
 }
 impl AzureWorkloadSqlRestoreRequest {
@@ -4107,7 +4224,11 @@ pub struct BackupEngineBaseResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupEngineBaseResource>,
 }
 impl azure_core::Continuable for BackupEngineBaseResourceList {
@@ -4233,7 +4354,11 @@ pub mod backup_management_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupManagementUsageList {
     #[doc = "The list of backup management usages for the given vault."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupManagementUsage>,
 }
 impl azure_core::Continuable for BackupManagementUsageList {
@@ -4730,7 +4855,12 @@ pub struct BackupResourceVaultConfig {
     #[serde(rename = "softDeleteFeatureState", default, skip_serializing_if = "Option::is_none")]
     pub soft_delete_feature_state: Option<backup_resource_vault_config::SoftDeleteFeatureState>,
     #[doc = "ResourceGuard Operation Requests"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
     #[doc = "Is soft delete feature state editable"]
     #[serde(rename = "isSoftDeleteFeatureStateEditable", default, skip_serializing_if = "Option::is_none")]
@@ -5227,7 +5357,12 @@ impl ClientDiscoveryForProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryForServiceSpecification {
     #[doc = "List of log specifications of this operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<ClientDiscoveryForLogSpecification>,
 }
 impl ClientDiscoveryForServiceSpecification {
@@ -5239,7 +5374,11 @@ impl ClientDiscoveryForServiceSpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryResponse {
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientDiscoveryValueForSingleApi>,
     #[doc = "Link to the next chunk of Response."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5332,10 +5471,19 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl CloudErrorBody {
@@ -5509,7 +5657,12 @@ impl DpmProtectedItemExtendedInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DailyRetentionFormat {
     #[doc = "List of days of the month."]
-    #[serde(rename = "daysOfTheMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_month: Vec<Day>,
 }
 impl DailyRetentionFormat {
@@ -5521,7 +5674,12 @@ impl DailyRetentionFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DailyRetentionSchedule {
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
@@ -5535,7 +5693,12 @@ impl DailyRetentionSchedule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DailySchedule {
     #[doc = "List of times of day this schedule has to be run."]
-    #[serde(rename = "scheduleRunTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_times: Vec<time::OffsetDateTime>,
 }
 impl DailySchedule {
@@ -5561,7 +5724,12 @@ impl Day {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskExclusionProperties {
     #[doc = "List of Disks' Logical Unit Numbers (LUN) to be used for VM Protection."]
-    #[serde(rename = "diskLunList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskLunList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_lun_list: Vec<i32>,
     #[doc = "Flag to indicate whether DiskLunList is to be included/ excluded from backup."]
     #[serde(rename = "isInclusionList", default, skip_serializing_if = "Option::is_none")]
@@ -5632,7 +5800,12 @@ pub struct DpmContainer {
     #[serde(rename = "dpmAgentVersion", default, skip_serializing_if = "Option::is_none")]
     pub dpm_agent_version: Option<String>,
     #[doc = "List of BackupEngines protecting the container"]
-    #[serde(rename = "dpmServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dpmServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dpm_servers: Vec<String>,
     #[doc = "To check if upgrade available"]
     #[serde(rename = "upgradeAvailable", default, skip_serializing_if = "Option::is_none")]
@@ -5666,7 +5839,11 @@ pub struct DpmErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl DpmErrorInfo {
@@ -5695,10 +5872,20 @@ pub struct DpmJob {
     #[serde(rename = "workloadType", default, skip_serializing_if = "Option::is_none")]
     pub workload_type: Option<String>,
     #[doc = "The state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "The errors."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<DpmErrorInfo>,
     #[doc = "Additional information on the DPM workload-specific job."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -5723,7 +5910,12 @@ impl DpmJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DpmJobExtendedInfo {
     #[doc = "List of tasks associated with this job."]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<DpmJobTaskDetails>,
     #[doc = "The job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -5810,7 +6002,11 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "List of recommendation strings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl ErrorDetail {
@@ -6004,7 +6200,12 @@ pub struct GenericProtectionPolicy {
     #[serde(flatten)]
     pub protection_policy: ProtectionPolicy,
     #[doc = "List of sub-protection policies which includes schedule and retention"]
-    #[serde(rename = "subProtectionPolicy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subProtectionPolicy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_protection_policy: Vec<SubProtectionPolicy>,
     #[doc = "TimeZone optional input as string. For example: TimeZone = \"Pacific Standard Time\"."]
     #[serde(rename = "timeZone", default, skip_serializing_if = "Option::is_none")]
@@ -6230,7 +6431,12 @@ pub struct IaasVmRecoveryPoint {
     #[serde(rename = "isInstantIlrSessionActive", default, skip_serializing_if = "Option::is_none")]
     pub is_instant_ilr_session_active: Option<bool>,
     #[doc = "Recovery point tier information."]
-    #[serde(rename = "recoveryPointTierDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryPointTierDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_point_tier_details: Vec<RecoveryPointTierInformationV2>,
     #[doc = "Whether VM is with Managed Disks"]
     #[serde(rename = "isManagedVirtualMachine", default, skip_serializing_if = "Option::is_none")]
@@ -6248,7 +6454,11 @@ pub struct IaasVmRecoveryPoint {
     #[serde(rename = "recoveryPointDiskConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub recovery_point_disk_configuration: Option<RecoveryPointDiskConfiguration>,
     #[doc = "Identifies the zone of the VM at the time of backup. Applicable only for zone-pinned Vms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Eligibility of RP to be moved to another tier"]
     #[serde(rename = "recoveryPointMoveReadinessInfo", default, skip_serializing_if = "Option::is_none")]
@@ -6324,7 +6534,12 @@ pub struct IaasVmRestoreRequest {
     #[serde(rename = "encryptionDetails", default, skip_serializing_if = "Option::is_none")]
     pub encryption_details: Option<EncryptionDetails>,
     #[doc = "List of Disk LUNs for partial restore"]
-    #[serde(rename = "restoreDiskLunList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreDiskLunList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_disk_lun_list: Vec<i32>,
     #[doc = "Flag to denote of an Unmanaged disk VM should be restored with Managed disks."]
     #[serde(rename = "restoreWithManagedDisks", default, skip_serializing_if = "Option::is_none")]
@@ -6333,7 +6548,11 @@ pub struct IaasVmRestoreRequest {
     #[serde(rename = "diskEncryptionSetId", default, skip_serializing_if = "Option::is_none")]
     pub disk_encryption_set_id: Option<String>,
     #[doc = "Target zone where the VM and its disks should be restored."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Encapsulates Managed Identity related information"]
     #[serde(rename = "identityInfo", default, skip_serializing_if = "Option::is_none")]
@@ -6472,7 +6691,12 @@ pub struct InquiryInfo {
     #[serde(rename = "errorDetail", default, skip_serializing_if = "Option::is_none")]
     pub error_detail: Option<ErrorDetail>,
     #[doc = "Inquiry Details which will have workload specific details.\r\nFor e.g. - For SQL and oracle this will contain different details."]
-    #[serde(rename = "inquiryDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inquiryDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inquiry_details: Vec<WorkloadInquiryDetails>,
 }
 impl InquiryInfo {
@@ -6502,7 +6726,12 @@ impl InquiryValidation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstantItemRecoveryTarget {
     #[doc = "List of client scripts."]
-    #[serde(rename = "clientScripts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientScripts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_scripts: Vec<ClientScriptForConnect>,
 }
 impl InstantItemRecoveryTarget {
@@ -6827,7 +7056,11 @@ pub struct JobResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResource>,
 }
 impl azure_core::Continuable for JobResourceList {
@@ -6866,7 +7099,12 @@ pub struct KpiResourceHealthDetails {
     #[serde(rename = "resourceHealthStatus", default, skip_serializing_if = "Option::is_none")]
     pub resource_health_status: Option<kpi_resource_health_details::ResourceHealthStatus>,
     #[doc = "Resource Health Status"]
-    #[serde(rename = "resourceHealthDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceHealthDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_health_details: Vec<ResourceHealthDetails>,
 }
 impl KpiResourceHealthDetails {
@@ -6947,7 +7185,12 @@ pub struct ListRecoveryPointsRecommendedForMoveRequest {
     #[serde(rename = "objectType", default, skip_serializing_if = "Option::is_none")]
     pub object_type: Option<String>,
     #[doc = "List of Recovery Points excluded from Move"]
-    #[serde(rename = "excludedRPList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedRPList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_rp_list: Vec<String>,
 }
 impl ListRecoveryPointsRecommendedForMoveRequest {
@@ -7025,7 +7268,11 @@ pub struct MabContainerHealthDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Health Recommended Actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl MabContainerHealthDetails {
@@ -7054,7 +7301,12 @@ pub struct MabContainer {
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
     pub extended_info: Option<MabContainerExtendedInfo>,
     #[doc = "Health details on this mab container."]
-    #[serde(rename = "mabContainerHealthDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mabContainerHealthDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mab_container_health_details: Vec<MabContainerHealthDetails>,
     #[doc = "Health state of mab container."]
     #[serde(rename = "containerHealthState", default, skip_serializing_if = "Option::is_none")]
@@ -7084,7 +7336,12 @@ pub struct MabContainerExtendedInfo {
     #[serde(rename = "backupItemType", default, skip_serializing_if = "Option::is_none")]
     pub backup_item_type: Option<mab_container_extended_info::BackupItemType>,
     #[doc = "List of backup items associated with this container."]
-    #[serde(rename = "backupItems", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupItems",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_items: Vec<String>,
     #[doc = "Backup policy associated with this container."]
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
@@ -7177,7 +7434,11 @@ pub struct MabErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl MabErrorInfo {
@@ -7253,7 +7514,12 @@ pub struct MabJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "The state/actions applicable on jobs like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Name of server protecting the DS."]
     #[serde(rename = "mabServerName", default, skip_serializing_if = "Option::is_none")]
@@ -7265,7 +7531,12 @@ pub struct MabJob {
     #[serde(rename = "workloadType", default, skip_serializing_if = "Option::is_none")]
     pub workload_type: Option<mab_job::WorkloadType>,
     #[doc = "The errors."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<MabErrorInfo>,
     #[doc = "Additional information for the MAB workload-specific job."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -7430,7 +7701,12 @@ pub mod mab_job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MabJobExtendedInfo {
     #[doc = "List of tasks for this job."]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<MabJobTaskDetails>,
     #[doc = "The job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -7502,7 +7778,12 @@ pub struct MonthlyRetentionSchedule {
     #[serde(rename = "retentionScheduleWeekly", default, skip_serializing_if = "Option::is_none")]
     pub retention_schedule_weekly: Option<WeeklyRetentionFormat>,
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
@@ -7639,10 +7920,19 @@ pub mod new_error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<NewErrorResponse>,
         #[doc = "The error additional info."]
-        #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalInfo",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_info: Vec<ErrorAdditionalInfo>,
     }
     impl Error {
@@ -7657,7 +7947,12 @@ pub struct OperationResultInfo {
     #[serde(flatten)]
     pub operation_result_info_base: OperationResultInfoBase,
     #[doc = "List of jobs created by this operation."]
-    #[serde(rename = "jobList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_list: Vec<String>,
 }
 impl OperationResultInfo {
@@ -7820,7 +8115,12 @@ pub struct OperationStatusJobsExtendedInfo {
     #[serde(flatten)]
     pub operation_status_extended_info: OperationStatusExtendedInfo,
     #[doc = "IDs of the jobs created for the protected item."]
-    #[serde(rename = "jobIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_ids: Vec<String>,
     #[doc = "Stores all the failed jobs along with the corresponding error codes."]
     #[serde(rename = "failedJobsError", default, skip_serializing_if = "Option::is_none")]
@@ -8189,7 +8489,12 @@ pub struct PrepareDataMoveRequest {
     #[serde(rename = "dataMoveLevel")]
     pub data_move_level: prepare_data_move_request::DataMoveLevel,
     #[doc = "Source Container ArmIds\r\nThis needs to be populated only if DataMoveLevel is set to container"]
-    #[serde(rename = "sourceContainerArmIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceContainerArmIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_container_arm_ids: Vec<String>,
     #[doc = "Ignore the artifacts which are already moved."]
     #[serde(rename = "ignoreMoved", default, skip_serializing_if = "Option::is_none")]
@@ -8556,7 +8861,11 @@ pub struct ProtectableContainerResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectableContainerResource>,
 }
 impl azure_core::Continuable for ProtectableContainerResourceList {
@@ -8616,7 +8925,12 @@ pub struct ProtectedItem {
     #[serde(rename = "isRehydrate", default, skip_serializing_if = "Option::is_none")]
     pub is_rehydrate: Option<bool>,
     #[doc = "ResourceGuardOperationRequests on which LAC check will be performed"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
     #[doc = "Flag to identify whether datasource is protected in archive"]
     #[serde(rename = "isArchiveEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -9036,7 +9350,11 @@ pub struct ProtectedItemResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectedItemResource>,
 }
 impl azure_core::Continuable for ProtectedItemResourceList {
@@ -9242,7 +9560,11 @@ pub struct ProtectionContainerResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionContainerResource>,
 }
 impl azure_core::Continuable for ProtectionContainerResourceList {
@@ -9583,7 +9905,11 @@ pub struct ProtectionIntentResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionIntentResource>,
 }
 impl azure_core::Continuable for ProtectionIntentResourceList {
@@ -9607,7 +9933,12 @@ pub struct ProtectionPolicy {
     #[serde(rename = "backupManagementType")]
     pub backup_management_type: String,
     #[doc = "ResourceGuard Operation Requests"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
 }
 impl ProtectionPolicy {
@@ -9783,7 +10114,11 @@ pub struct ProtectionPolicyResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionPolicyResource>,
 }
 impl azure_core::Continuable for ProtectionPolicyResourceList {
@@ -9819,10 +10154,20 @@ pub struct RecoveryPointDiskConfiguration {
     #[serde(rename = "numberOfDisksAttachedToVm", default, skip_serializing_if = "Option::is_none")]
     pub number_of_disks_attached_to_vm: Option<i32>,
     #[doc = "Information of disks included in backup"]
-    #[serde(rename = "includedDiskList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedDiskList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_disk_list: Vec<DiskInformation>,
     #[doc = "Information of disks excluded from backup"]
-    #[serde(rename = "excludedDiskList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedDiskList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_disk_list: Vec<DiskInformation>,
 }
 impl RecoveryPointDiskConfiguration {
@@ -9917,7 +10262,11 @@ pub struct RecoveryPointResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryPointResource>,
 }
 impl azure_core::Continuable for RecoveryPointResourceList {
@@ -10122,7 +10471,12 @@ impl ResourceGuardOperationDetail {
 pub struct ResourceGuardProxyBase {
     #[serde(rename = "resourceGuardResourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_guard_resource_id: Option<String>,
-    #[serde(rename = "resourceGuardOperationDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_details: Vec<ResourceGuardOperationDetail>,
     #[serde(rename = "lastUpdatedTime", default, skip_serializing_if = "Option::is_none")]
     pub last_updated_time: Option<String>,
@@ -10152,7 +10506,11 @@ pub struct ResourceGuardProxyBaseResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceGuardProxyBaseResource>,
 }
 impl azure_core::Continuable for ResourceGuardProxyBaseResourceList {
@@ -10179,7 +10537,11 @@ pub struct ResourceHealthDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Health Recommended Actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl ResourceHealthDetails {
@@ -10455,7 +10817,12 @@ impl SchedulePolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityPinBase {
     #[doc = "ResourceGuard Operation Requests"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
 }
 impl SecurityPinBase {
@@ -10507,10 +10874,20 @@ pub struct SimpleSchedulePolicy {
     #[serde(rename = "scheduleRunFrequency", default, skip_serializing_if = "Option::is_none")]
     pub schedule_run_frequency: Option<simple_schedule_policy::ScheduleRunFrequency>,
     #[doc = "List of days of week this schedule has to be run."]
-    #[serde(rename = "scheduleRunDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_days: Vec<String>,
     #[doc = "List of times of day this schedule has to be run."]
-    #[serde(rename = "scheduleRunTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_times: Vec<time::OffsetDateTime>,
     #[serde(rename = "hourlySchedule", default, skip_serializing_if = "Option::is_none")]
     pub hourly_schedule: Option<HourlySchedule>,
@@ -10822,7 +11199,12 @@ pub struct TriggerDataMoveRequest {
     #[serde(rename = "correlationId")]
     pub correlation_id: String,
     #[doc = "Source Container ArmIds"]
-    #[serde(rename = "sourceContainerArmIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceContainerArmIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_container_arm_ids: Vec<String>,
     #[doc = "Pause GC"]
     #[serde(rename = "pauseGC", default, skip_serializing_if = "Option::is_none")]
@@ -10890,7 +11272,12 @@ pub mod trigger_data_move_request {
 #[doc = "Request body of unlock delete API."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UnlockDeleteRequest {
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
     #[serde(rename = "resourceToBeDeleted", default, skip_serializing_if = "Option::is_none")]
     pub resource_to_be_deleted: Option<String>,
@@ -10941,7 +11328,12 @@ impl ValidateOperationRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ValidateOperationResponse {
     #[doc = "Gets the validation result"]
-    #[serde(rename = "validationResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_results: Vec<ErrorDetail>,
 }
 impl ValidateOperationResponse {
@@ -10986,10 +11378,20 @@ pub struct VaultJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<VaultJobErrorInfo>,
     #[doc = "Vault Job for CMK - has CMK specific info."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -11016,7 +11418,11 @@ pub struct VaultJobErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl VaultJobErrorInfo {
@@ -11052,10 +11458,20 @@ impl VaultStorageConfigOperationResultResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeeklyRetentionFormat {
     #[doc = "List of days of the week."]
-    #[serde(rename = "daysOfTheWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_week: Vec<String>,
     #[doc = "List of weeks of month."]
-    #[serde(rename = "weeksOfTheMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weeksOfTheMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weeks_of_the_month: Vec<String>,
 }
 impl WeeklyRetentionFormat {
@@ -11067,10 +11483,20 @@ impl WeeklyRetentionFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeeklyRetentionSchedule {
     #[doc = "List of days of week for weekly retention policy."]
-    #[serde(rename = "daysOfTheWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_week: Vec<String>,
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
@@ -11083,10 +11509,20 @@ impl WeeklyRetentionSchedule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeeklySchedule {
-    #[serde(rename = "scheduleRunDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_days: Vec<String>,
     #[doc = "List of times of day this schedule has to be run."]
-    #[serde(rename = "scheduleRunTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_times: Vec<time::OffsetDateTime>,
 }
 impl WeeklySchedule {
@@ -11208,7 +11644,11 @@ pub struct WorkloadItemResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadItemResource>,
 }
 impl azure_core::Continuable for WorkloadItemResourceList {
@@ -11318,7 +11758,11 @@ pub struct WorkloadProtectableItemResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadProtectableItemResource>,
 }
 impl azure_core::Continuable for WorkloadProtectableItemResourceList {
@@ -11339,7 +11783,12 @@ pub struct YearlyRetentionSchedule {
     #[serde(rename = "retentionScheduleFormatType", default, skip_serializing_if = "Option::is_none")]
     pub retention_schedule_format_type: Option<yearly_retention_schedule::RetentionScheduleFormatType>,
     #[doc = "List of months of year of yearly retention policy."]
-    #[serde(rename = "monthsOfYear", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthsOfYear",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub months_of_year: Vec<String>,
     #[doc = "Daily retention format."]
     #[serde(rename = "retentionScheduleDaily", default, skip_serializing_if = "Option::is_none")]
@@ -11348,7 +11797,12 @@ pub struct YearlyRetentionSchedule {
     #[serde(rename = "retentionScheduleWeekly", default, skip_serializing_if = "Option::is_none")]
     pub retention_schedule_weekly: Option<WeeklyRetentionFormat>,
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/recoveryservicesbackup/src/package_2022_06_01_preview/models.rs b/services/mgmt/recoveryservicesbackup/src/package_2022_06_01_preview/models.rs
index d2efac3e1d..8623221157 100644
--- a/services/mgmt/recoveryservicesbackup/src/package_2022_06_01_preview/models.rs
+++ b/services/mgmt/recoveryservicesbackup/src/package_2022_06_01_preview/models.rs
@@ -293,7 +293,12 @@ pub struct AzureFileShareRestoreRequest {
     #[serde(rename = "restoreRequestType", default, skip_serializing_if = "Option::is_none")]
     pub restore_request_type: Option<azure_file_share_restore_request::RestoreRequestType>,
     #[doc = "List of Source Files/Folders(which need to recover) and TargetFolderPath details"]
-    #[serde(rename = "restoreFileSpecs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreFileSpecs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_file_specs: Vec<RestoreFileSpecs>,
     #[doc = "Target Azure File Share Info."]
     #[serde(rename = "targetDetails", default, skip_serializing_if = "Option::is_none")]
@@ -637,7 +642,11 @@ pub struct AzureIaaSvmErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl AzureIaaSvmErrorInfo {
@@ -665,10 +674,20 @@ pub struct AzureIaaSvmJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureIaaSvmErrorInfo>,
     #[doc = "Specifies whether the backup item is a Classic or an Azure Resource Manager VM."]
     #[serde(rename = "virtualMachineVersion", default, skip_serializing_if = "Option::is_none")]
@@ -701,7 +720,12 @@ impl AzureIaaSvmJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureIaaSvmJobExtendedInfo {
     #[doc = "List of tasks associated with this job."]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<AzureIaaSvmJobTaskDetails>,
     #[doc = "Job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -763,7 +787,12 @@ pub struct AzureIaaSvmJobV2 {
     #[serde(flatten)]
     pub job: Job,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Container name of the entity on which the current job is executing."]
     #[serde(rename = "containerName", default, skip_serializing_if = "Option::is_none")]
@@ -772,7 +801,12 @@ pub struct AzureIaaSvmJobV2 {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureIaaSvmErrorInfo>,
     #[doc = "Specifies whether the backup item is a Classic or an Azure Resource Manager VM."]
     #[serde(rename = "virtualMachineVersion", default, skip_serializing_if = "Option::is_none")]
@@ -815,7 +849,12 @@ pub struct AzureIaaSvmProtectedItem {
     #[serde(rename = "healthStatus", default, skip_serializing_if = "Option::is_none")]
     pub health_status: Option<azure_iaa_svm_protected_item::HealthStatus>,
     #[doc = "Health details on this backup item."]
-    #[serde(rename = "healthDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_details: Vec<AzureIaaSvmHealthDetails>,
     #[doc = "Health details of different KPIs"]
     #[serde(rename = "kpisHealths", default, skip_serializing_if = "Option::is_none")]
@@ -1294,7 +1333,11 @@ pub struct AzureStorageErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl AzureStorageErrorInfo {
@@ -1311,10 +1354,20 @@ pub struct AzureStorageJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureStorageErrorInfo>,
     #[doc = "Specifies friendly name of the storage account."]
     #[serde(rename = "storageAccountName", default, skip_serializing_if = "Option::is_none")]
@@ -1347,7 +1400,12 @@ impl AzureStorageJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureStorageJobExtendedInfo {
     #[doc = "List of tasks for this job"]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<AzureStorageJobTaskDetails>,
     #[doc = "Job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -1810,7 +1868,12 @@ pub struct AzureVmWorkloadProtectionPolicy {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub settings: Option<Settings>,
     #[doc = "List of sub-protection policies which includes schedule and retention"]
-    #[serde(rename = "subProtectionPolicy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subProtectionPolicy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_protection_policy: Vec<SubProtectionPolicy>,
     #[doc = "Fix the policy inconsistency"]
     #[serde(rename = "makePolicyConsistent", default, skip_serializing_if = "Option::is_none")]
@@ -2119,7 +2182,12 @@ pub struct AzureVmWorkloadSqlInstanceWorkloadItem {
     #[serde(flatten)]
     pub azure_vm_workload_item: AzureVmWorkloadItem,
     #[doc = "Data Directory Paths for default directories"]
-    #[serde(rename = "dataDirectoryPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDirectoryPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_directory_paths: Vec<SqlDataDirectory>,
 }
 impl AzureVmWorkloadSqlInstanceWorkloadItem {
@@ -2388,7 +2456,12 @@ pub struct AzureWorkloadContainerExtendedInfo {
     #[serde(rename = "inquiryInfo", default, skip_serializing_if = "Option::is_none")]
     pub inquiry_info: Option<InquiryInfo>,
     #[doc = "List of the nodes in case of distributed container."]
-    #[serde(rename = "nodesList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nodesList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes_list: Vec<DistributedNodesInfo>,
 }
 impl AzureWorkloadContainerExtendedInfo {
@@ -2409,7 +2482,11 @@ pub struct AzureWorkloadErrorInfo {
     #[serde(rename = "errorTitle", default, skip_serializing_if = "Option::is_none")]
     pub error_title: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
     #[doc = "Additional details for above error code."]
     #[serde(rename = "additionalDetails", default, skip_serializing_if = "Option::is_none")]
@@ -2432,10 +2509,20 @@ pub struct AzureWorkloadJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<AzureWorkloadErrorInfo>,
     #[doc = "Azure VM workload-specific additional information for job."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -2457,7 +2544,12 @@ impl AzureWorkloadJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureWorkloadJobExtendedInfo {
     #[doc = "List of tasks for this job"]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<AzureWorkloadJobTaskDetails>,
     #[doc = "Job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -2492,7 +2584,12 @@ pub struct AzureWorkloadPointInTimeRecoveryPoint {
     #[serde(flatten)]
     pub azure_workload_recovery_point: AzureWorkloadRecoveryPoint,
     #[doc = "List of log ranges"]
-    #[serde(rename = "timeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_ranges: Vec<PointInTimeRange>,
 }
 impl AzureWorkloadPointInTimeRecoveryPoint {
@@ -2532,7 +2629,12 @@ pub struct AzureWorkloadRecoveryPoint {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<azure_workload_recovery_point::Type>,
     #[doc = "Recovery point tier information."]
-    #[serde(rename = "recoveryPointTierDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryPointTierDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_point_tier_details: Vec<RecoveryPointTierInformationV2>,
     #[doc = "Eligibility of RP to be moved to another tier"]
     #[serde(rename = "recoveryPointMoveReadinessInfo", default, skip_serializing_if = "Option::is_none")]
@@ -2893,7 +2995,12 @@ pub struct AzureWorkloadSqlPointInTimeRecoveryPoint {
     #[serde(flatten)]
     pub azure_workload_sql_recovery_point: AzureWorkloadSqlRecoveryPoint,
     #[doc = "List of log ranges"]
-    #[serde(rename = "timeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_ranges: Vec<PointInTimeRange>,
 }
 impl AzureWorkloadSqlPointInTimeRecoveryPoint {
@@ -2962,7 +3069,12 @@ pub struct AzureWorkloadSqlRecoveryPointExtendedInfo {
     #[serde(rename = "dataDirectoryTimeInUTC", default, with = "azure_core::date::rfc3339::option")]
     pub data_directory_time_in_utc: Option<time::OffsetDateTime>,
     #[doc = "List of data directory paths during restore operation."]
-    #[serde(rename = "dataDirectoryPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDirectoryPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_directory_paths: Vec<SqlDataDirectory>,
 }
 impl AzureWorkloadSqlRecoveryPointExtendedInfo {
@@ -2982,7 +3094,12 @@ pub struct AzureWorkloadSqlRestoreRequest {
     #[serde(rename = "isNonRecoverable", default, skip_serializing_if = "Option::is_none")]
     pub is_non_recoverable: Option<bool>,
     #[doc = "Data directory details"]
-    #[serde(rename = "alternateDirectoryPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateDirectoryPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_directory_paths: Vec<SqlDataDirectoryMapping>,
 }
 impl AzureWorkloadSqlRestoreRequest {
@@ -4207,7 +4324,11 @@ pub struct BackupEngineBaseResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupEngineBaseResource>,
 }
 impl azure_core::Continuable for BackupEngineBaseResourceList {
@@ -4333,7 +4454,11 @@ pub mod backup_management_usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupManagementUsageList {
     #[doc = "The list of backup management usages for the given vault."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupManagementUsage>,
 }
 impl azure_core::Continuable for BackupManagementUsageList {
@@ -4830,7 +4955,12 @@ pub struct BackupResourceVaultConfig {
     #[serde(rename = "softDeleteFeatureState", default, skip_serializing_if = "Option::is_none")]
     pub soft_delete_feature_state: Option<backup_resource_vault_config::SoftDeleteFeatureState>,
     #[doc = "ResourceGuard Operation Requests"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
     #[doc = "Is soft delete feature state editable"]
     #[serde(rename = "isSoftDeleteFeatureStateEditable", default, skip_serializing_if = "Option::is_none")]
@@ -5330,7 +5460,12 @@ impl ClientDiscoveryForProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryForServiceSpecification {
     #[doc = "List of log specifications of this operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<ClientDiscoveryForLogSpecification>,
 }
 impl ClientDiscoveryForServiceSpecification {
@@ -5342,7 +5477,11 @@ impl ClientDiscoveryForServiceSpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientDiscoveryResponse {
     #[doc = "List of available operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientDiscoveryValueForSingleApi>,
     #[doc = "Link to the next chunk of Response."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5435,10 +5574,19 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl CloudErrorBody {
@@ -5612,7 +5760,12 @@ impl DpmProtectedItemExtendedInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DailyRetentionFormat {
     #[doc = "List of days of the month."]
-    #[serde(rename = "daysOfTheMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_month: Vec<Day>,
 }
 impl DailyRetentionFormat {
@@ -5624,7 +5777,12 @@ impl DailyRetentionFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DailyRetentionSchedule {
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
@@ -5638,7 +5796,12 @@ impl DailyRetentionSchedule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DailySchedule {
     #[doc = "List of times of day this schedule has to be run."]
-    #[serde(rename = "scheduleRunTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_times: Vec<time::OffsetDateTime>,
 }
 impl DailySchedule {
@@ -5664,7 +5827,12 @@ impl Day {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskExclusionProperties {
     #[doc = "List of Disks' Logical Unit Numbers (LUN) to be used for VM Protection."]
-    #[serde(rename = "diskLunList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskLunList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_lun_list: Vec<i32>,
     #[doc = "Flag to indicate whether DiskLunList is to be included/ excluded from backup."]
     #[serde(rename = "isInclusionList", default, skip_serializing_if = "Option::is_none")]
@@ -5735,7 +5903,12 @@ pub struct DpmContainer {
     #[serde(rename = "dpmAgentVersion", default, skip_serializing_if = "Option::is_none")]
     pub dpm_agent_version: Option<String>,
     #[doc = "List of BackupEngines protecting the container"]
-    #[serde(rename = "dpmServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dpmServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dpm_servers: Vec<String>,
     #[doc = "To check if upgrade available"]
     #[serde(rename = "upgradeAvailable", default, skip_serializing_if = "Option::is_none")]
@@ -5769,7 +5942,11 @@ pub struct DpmErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl DpmErrorInfo {
@@ -5798,10 +5975,20 @@ pub struct DpmJob {
     #[serde(rename = "workloadType", default, skip_serializing_if = "Option::is_none")]
     pub workload_type: Option<String>,
     #[doc = "The state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "The errors."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<DpmErrorInfo>,
     #[doc = "Additional information on the DPM workload-specific job."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -5826,7 +6013,12 @@ impl DpmJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DpmJobExtendedInfo {
     #[doc = "List of tasks associated with this job."]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<DpmJobTaskDetails>,
     #[doc = "The job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -5913,7 +6105,11 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "List of recommendation strings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl ErrorDetail {
@@ -6107,7 +6303,12 @@ pub struct GenericProtectionPolicy {
     #[serde(flatten)]
     pub protection_policy: ProtectionPolicy,
     #[doc = "List of sub-protection policies which includes schedule and retention"]
-    #[serde(rename = "subProtectionPolicy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subProtectionPolicy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_protection_policy: Vec<SubProtectionPolicy>,
     #[doc = "TimeZone optional input as string. For example: TimeZone = \"Pacific Standard Time\"."]
     #[serde(rename = "timeZone", default, skip_serializing_if = "Option::is_none")]
@@ -6333,7 +6534,12 @@ pub struct IaasVmRecoveryPoint {
     #[serde(rename = "isInstantIlrSessionActive", default, skip_serializing_if = "Option::is_none")]
     pub is_instant_ilr_session_active: Option<bool>,
     #[doc = "Recovery point tier information."]
-    #[serde(rename = "recoveryPointTierDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryPointTierDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_point_tier_details: Vec<RecoveryPointTierInformationV2>,
     #[doc = "Whether VM is with Managed Disks"]
     #[serde(rename = "isManagedVirtualMachine", default, skip_serializing_if = "Option::is_none")]
@@ -6351,7 +6557,11 @@ pub struct IaasVmRecoveryPoint {
     #[serde(rename = "recoveryPointDiskConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub recovery_point_disk_configuration: Option<RecoveryPointDiskConfiguration>,
     #[doc = "Identifies the zone of the VM at the time of backup. Applicable only for zone-pinned Vms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Eligibility of RP to be moved to another tier"]
     #[serde(rename = "recoveryPointMoveReadinessInfo", default, skip_serializing_if = "Option::is_none")]
@@ -6427,7 +6637,12 @@ pub struct IaasVmRestoreRequest {
     #[serde(rename = "encryptionDetails", default, skip_serializing_if = "Option::is_none")]
     pub encryption_details: Option<EncryptionDetails>,
     #[doc = "List of Disk LUNs for partial restore"]
-    #[serde(rename = "restoreDiskLunList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreDiskLunList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_disk_lun_list: Vec<i32>,
     #[doc = "Flag to denote of an Unmanaged disk VM should be restored with Managed disks."]
     #[serde(rename = "restoreWithManagedDisks", default, skip_serializing_if = "Option::is_none")]
@@ -6436,7 +6651,11 @@ pub struct IaasVmRestoreRequest {
     #[serde(rename = "diskEncryptionSetId", default, skip_serializing_if = "Option::is_none")]
     pub disk_encryption_set_id: Option<String>,
     #[doc = "Target zone where the VM and its disks should be restored."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Encapsulates Managed Identity related information"]
     #[serde(rename = "identityInfo", default, skip_serializing_if = "Option::is_none")]
@@ -6575,7 +6794,12 @@ pub struct InquiryInfo {
     #[serde(rename = "errorDetail", default, skip_serializing_if = "Option::is_none")]
     pub error_detail: Option<ErrorDetail>,
     #[doc = "Inquiry Details which will have workload specific details.\r\nFor e.g. - For SQL and oracle this will contain different details."]
-    #[serde(rename = "inquiryDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inquiryDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inquiry_details: Vec<WorkloadInquiryDetails>,
 }
 impl InquiryInfo {
@@ -6605,7 +6829,12 @@ impl InquiryValidation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstantItemRecoveryTarget {
     #[doc = "List of client scripts."]
-    #[serde(rename = "clientScripts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientScripts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_scripts: Vec<ClientScriptForConnect>,
 }
 impl InstantItemRecoveryTarget {
@@ -6930,7 +7159,11 @@ pub struct JobResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResource>,
 }
 impl azure_core::Continuable for JobResourceList {
@@ -6969,7 +7202,12 @@ pub struct KpiResourceHealthDetails {
     #[serde(rename = "resourceHealthStatus", default, skip_serializing_if = "Option::is_none")]
     pub resource_health_status: Option<kpi_resource_health_details::ResourceHealthStatus>,
     #[doc = "Resource Health Status"]
-    #[serde(rename = "resourceHealthDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceHealthDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_health_details: Vec<ResourceHealthDetails>,
 }
 impl KpiResourceHealthDetails {
@@ -7050,7 +7288,12 @@ pub struct ListRecoveryPointsRecommendedForMoveRequest {
     #[serde(rename = "objectType", default, skip_serializing_if = "Option::is_none")]
     pub object_type: Option<String>,
     #[doc = "List of Recovery Points excluded from Move"]
-    #[serde(rename = "excludedRPList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedRPList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_rp_list: Vec<String>,
 }
 impl ListRecoveryPointsRecommendedForMoveRequest {
@@ -7128,7 +7371,11 @@ pub struct MabContainerHealthDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Health Recommended Actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl MabContainerHealthDetails {
@@ -7157,7 +7404,12 @@ pub struct MabContainer {
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
     pub extended_info: Option<MabContainerExtendedInfo>,
     #[doc = "Health details on this mab container."]
-    #[serde(rename = "mabContainerHealthDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mabContainerHealthDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mab_container_health_details: Vec<MabContainerHealthDetails>,
     #[doc = "Health state of mab container."]
     #[serde(rename = "containerHealthState", default, skip_serializing_if = "Option::is_none")]
@@ -7187,7 +7439,12 @@ pub struct MabContainerExtendedInfo {
     #[serde(rename = "backupItemType", default, skip_serializing_if = "Option::is_none")]
     pub backup_item_type: Option<mab_container_extended_info::BackupItemType>,
     #[doc = "List of backup items associated with this container."]
-    #[serde(rename = "backupItems", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupItems",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_items: Vec<String>,
     #[doc = "Backup policy associated with this container."]
     #[serde(rename = "policyName", default, skip_serializing_if = "Option::is_none")]
@@ -7283,7 +7540,11 @@ pub struct MabErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl MabErrorInfo {
@@ -7359,7 +7620,12 @@ pub struct MabJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "The state/actions applicable on jobs like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Name of server protecting the DS."]
     #[serde(rename = "mabServerName", default, skip_serializing_if = "Option::is_none")]
@@ -7371,7 +7637,12 @@ pub struct MabJob {
     #[serde(rename = "workloadType", default, skip_serializing_if = "Option::is_none")]
     pub workload_type: Option<mab_job::WorkloadType>,
     #[doc = "The errors."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<MabErrorInfo>,
     #[doc = "Additional information for the MAB workload-specific job."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -7539,7 +7810,12 @@ pub mod mab_job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MabJobExtendedInfo {
     #[doc = "List of tasks for this job."]
-    #[serde(rename = "tasksList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tasksList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks_list: Vec<MabJobTaskDetails>,
     #[doc = "The job properties."]
     #[serde(rename = "propertyBag", default, skip_serializing_if = "Option::is_none")]
@@ -7611,7 +7887,12 @@ pub struct MonthlyRetentionSchedule {
     #[serde(rename = "retentionScheduleWeekly", default, skip_serializing_if = "Option::is_none")]
     pub retention_schedule_weekly: Option<WeeklyRetentionFormat>,
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
@@ -7748,10 +8029,19 @@ pub mod new_error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<NewErrorResponse>,
         #[doc = "The error additional info."]
-        #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalInfo",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_info: Vec<ErrorAdditionalInfo>,
     }
     impl Error {
@@ -7766,7 +8056,12 @@ pub struct OperationResultInfo {
     #[serde(flatten)]
     pub operation_result_info_base: OperationResultInfoBase,
     #[doc = "List of jobs created by this operation."]
-    #[serde(rename = "jobList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_list: Vec<String>,
 }
 impl OperationResultInfo {
@@ -7929,7 +8224,12 @@ pub struct OperationStatusJobsExtendedInfo {
     #[serde(flatten)]
     pub operation_status_extended_info: OperationStatusExtendedInfo,
     #[doc = "IDs of the jobs created for the protected item."]
-    #[serde(rename = "jobIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_ids: Vec<String>,
     #[doc = "Stores all the failed jobs along with the corresponding error codes."]
     #[serde(rename = "failedJobsError", default, skip_serializing_if = "Option::is_none")]
@@ -8301,7 +8601,12 @@ pub struct PrepareDataMoveRequest {
     #[serde(rename = "dataMoveLevel")]
     pub data_move_level: prepare_data_move_request::DataMoveLevel,
     #[doc = "Source Container ArmIds\r\nThis needs to be populated only if DataMoveLevel is set to container"]
-    #[serde(rename = "sourceContainerArmIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceContainerArmIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_container_arm_ids: Vec<String>,
     #[doc = "Ignore the artifacts which are already moved."]
     #[serde(rename = "ignoreMoved", default, skip_serializing_if = "Option::is_none")]
@@ -8668,7 +8973,11 @@ pub struct ProtectableContainerResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectableContainerResource>,
 }
 impl azure_core::Continuable for ProtectableContainerResourceList {
@@ -8728,7 +9037,12 @@ pub struct ProtectedItem {
     #[serde(rename = "isRehydrate", default, skip_serializing_if = "Option::is_none")]
     pub is_rehydrate: Option<bool>,
     #[doc = "ResourceGuardOperationRequests on which LAC check will be performed"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
     #[doc = "Flag to identify whether datasource is protected in archive"]
     #[serde(rename = "isArchiveEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -9154,7 +9468,11 @@ pub struct ProtectedItemResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectedItemResource>,
 }
 impl azure_core::Continuable for ProtectedItemResourceList {
@@ -9360,7 +9678,11 @@ pub struct ProtectionContainerResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionContainerResource>,
 }
 impl azure_core::Continuable for ProtectionContainerResourceList {
@@ -9701,7 +10023,11 @@ pub struct ProtectionIntentResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionIntentResource>,
 }
 impl azure_core::Continuable for ProtectionIntentResourceList {
@@ -9725,7 +10051,12 @@ pub struct ProtectionPolicy {
     #[serde(rename = "backupManagementType")]
     pub backup_management_type: String,
     #[doc = "ResourceGuard Operation Requests"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
 }
 impl ProtectionPolicy {
@@ -9904,7 +10235,11 @@ pub struct ProtectionPolicyResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionPolicyResource>,
 }
 impl azure_core::Continuable for ProtectionPolicyResourceList {
@@ -9940,10 +10275,20 @@ pub struct RecoveryPointDiskConfiguration {
     #[serde(rename = "numberOfDisksAttachedToVm", default, skip_serializing_if = "Option::is_none")]
     pub number_of_disks_attached_to_vm: Option<i32>,
     #[doc = "Information of disks included in backup"]
-    #[serde(rename = "includedDiskList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedDiskList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_disk_list: Vec<DiskInformation>,
     #[doc = "Information of disks excluded from backup"]
-    #[serde(rename = "excludedDiskList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedDiskList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_disk_list: Vec<DiskInformation>,
 }
 impl RecoveryPointDiskConfiguration {
@@ -10038,7 +10383,11 @@ pub struct RecoveryPointResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryPointResource>,
 }
 impl azure_core::Continuable for RecoveryPointResourceList {
@@ -10243,7 +10592,12 @@ impl ResourceGuardOperationDetail {
 pub struct ResourceGuardProxyBase {
     #[serde(rename = "resourceGuardResourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_guard_resource_id: Option<String>,
-    #[serde(rename = "resourceGuardOperationDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_details: Vec<ResourceGuardOperationDetail>,
     #[serde(rename = "lastUpdatedTime", default, skip_serializing_if = "Option::is_none")]
     pub last_updated_time: Option<String>,
@@ -10273,7 +10627,11 @@ pub struct ResourceGuardProxyBaseResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceGuardProxyBaseResource>,
 }
 impl azure_core::Continuable for ResourceGuardProxyBaseResourceList {
@@ -10300,7 +10658,11 @@ pub struct ResourceHealthDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Health Recommended Actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl ResourceHealthDetails {
@@ -10576,7 +10938,12 @@ impl SchedulePolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityPinBase {
     #[doc = "ResourceGuard Operation Requests"]
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
 }
 impl SecurityPinBase {
@@ -10628,10 +10995,20 @@ pub struct SimpleSchedulePolicy {
     #[serde(rename = "scheduleRunFrequency", default, skip_serializing_if = "Option::is_none")]
     pub schedule_run_frequency: Option<simple_schedule_policy::ScheduleRunFrequency>,
     #[doc = "List of days of week this schedule has to be run."]
-    #[serde(rename = "scheduleRunDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_days: Vec<String>,
     #[doc = "List of times of day this schedule has to be run."]
-    #[serde(rename = "scheduleRunTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_times: Vec<time::OffsetDateTime>,
     #[serde(rename = "hourlySchedule", default, skip_serializing_if = "Option::is_none")]
     pub hourly_schedule: Option<HourlySchedule>,
@@ -11055,7 +11432,12 @@ pub struct TriggerDataMoveRequest {
     #[serde(rename = "correlationId")]
     pub correlation_id: String,
     #[doc = "Source Container ArmIds"]
-    #[serde(rename = "sourceContainerArmIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceContainerArmIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_container_arm_ids: Vec<String>,
     #[doc = "Pause GC"]
     #[serde(rename = "pauseGC", default, skip_serializing_if = "Option::is_none")]
@@ -11123,7 +11505,12 @@ pub mod trigger_data_move_request {
 #[doc = "Request body of unlock delete API."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UnlockDeleteRequest {
-    #[serde(rename = "resourceGuardOperationRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceGuardOperationRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_guard_operation_requests: Vec<String>,
     #[serde(rename = "resourceToBeDeleted", default, skip_serializing_if = "Option::is_none")]
     pub resource_to_be_deleted: Option<String>,
@@ -11174,7 +11561,12 @@ impl ValidateOperationRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ValidateOperationResponse {
     #[doc = "Gets the validation result"]
-    #[serde(rename = "validationResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_results: Vec<ErrorDetail>,
 }
 impl ValidateOperationResponse {
@@ -11219,10 +11611,20 @@ pub struct VaultJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<String>,
     #[doc = "Gets or sets the state/actions applicable on this job like cancel/retry."]
-    #[serde(rename = "actionsInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionsInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions_info: Vec<String>,
     #[doc = "Error details on execution of this job."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<VaultJobErrorInfo>,
     #[doc = "Vault Job for CMK - has CMK specific info."]
     #[serde(rename = "extendedInfo", default, skip_serializing_if = "Option::is_none")]
@@ -11249,7 +11651,11 @@ pub struct VaultJobErrorInfo {
     #[serde(rename = "errorString", default, skip_serializing_if = "Option::is_none")]
     pub error_string: Option<String>,
     #[doc = "List of localized recommendations for above error code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
 }
 impl VaultJobErrorInfo {
@@ -11285,10 +11691,20 @@ impl VaultStorageConfigOperationResultResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeeklyRetentionFormat {
     #[doc = "List of days of the week."]
-    #[serde(rename = "daysOfTheWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_week: Vec<String>,
     #[doc = "List of weeks of month."]
-    #[serde(rename = "weeksOfTheMonth", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weeksOfTheMonth",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weeks_of_the_month: Vec<String>,
 }
 impl WeeklyRetentionFormat {
@@ -11300,10 +11716,20 @@ impl WeeklyRetentionFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeeklyRetentionSchedule {
     #[doc = "List of days of week for weekly retention policy."]
-    #[serde(rename = "daysOfTheWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfTheWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_the_week: Vec<String>,
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
@@ -11316,10 +11742,20 @@ impl WeeklyRetentionSchedule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WeeklySchedule {
-    #[serde(rename = "scheduleRunDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_days: Vec<String>,
     #[doc = "List of times of day this schedule has to be run."]
-    #[serde(rename = "scheduleRunTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scheduleRunTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schedule_run_times: Vec<time::OffsetDateTime>,
 }
 impl WeeklySchedule {
@@ -11441,7 +11877,11 @@ pub struct WorkloadItemResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadItemResource>,
 }
 impl azure_core::Continuable for WorkloadItemResourceList {
@@ -11551,7 +11991,11 @@ pub struct WorkloadProtectableItemResourceList {
     #[serde(flatten)]
     pub resource_list: ResourceList,
     #[doc = "List of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadProtectableItemResource>,
 }
 impl azure_core::Continuable for WorkloadProtectableItemResourceList {
@@ -11572,7 +12016,12 @@ pub struct YearlyRetentionSchedule {
     #[serde(rename = "retentionScheduleFormatType", default, skip_serializing_if = "Option::is_none")]
     pub retention_schedule_format_type: Option<yearly_retention_schedule::RetentionScheduleFormatType>,
     #[doc = "List of months of year of yearly retention policy."]
-    #[serde(rename = "monthsOfYear", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthsOfYear",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub months_of_year: Vec<String>,
     #[doc = "Daily retention format."]
     #[serde(rename = "retentionScheduleDaily", default, skip_serializing_if = "Option::is_none")]
@@ -11581,7 +12030,12 @@ pub struct YearlyRetentionSchedule {
     #[serde(rename = "retentionScheduleWeekly", default, skip_serializing_if = "Option::is_none")]
     pub retention_schedule_weekly: Option<WeeklyRetentionFormat>,
     #[doc = "Retention times of retention policy."]
-    #[serde(rename = "retentionTimes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionTimes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_times: Vec<time::OffsetDateTime>,
     #[doc = "Retention duration."]
     #[serde(rename = "retentionDuration", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/recoveryservicessiterecovery/src/package_2022_02/models.rs b/services/mgmt/recoveryservicessiterecovery/src/package_2022_02/models.rs
index b3a7be1751..948a13dd40 100644
--- a/services/mgmt/recoveryservicessiterecovery/src/package_2022_02/models.rs
+++ b/services/mgmt/recoveryservicessiterecovery/src/package_2022_02/models.rs
@@ -9,10 +9,20 @@ pub struct A2aAddDisksInput {
     #[serde(flatten)]
     pub add_disks_provider_specific_input: AddDisksProviderSpecificInput,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aVmManagedDiskInputDetails>,
 }
 impl A2aAddDisksInput {
@@ -209,10 +219,20 @@ pub struct A2aCreateProtectionIntentInput {
     #[serde(rename = "autoProtectionOfDataDisk", default, skip_serializing_if = "Option::is_none")]
     pub auto_protection_of_data_disk: Option<a2a_create_protection_intent_input::AutoProtectionOfDataDisk>,
     #[doc = "The list of vm disk inputs."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aProtectionIntentDiskInputDetails>,
     #[doc = "The list of vm managed disk inputs."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aProtectionIntentManagedDiskInputDetails>,
     #[doc = "The multi vm group name."]
     #[serde(rename = "multiVmGroupName", default, skip_serializing_if = "Option::is_none")]
@@ -557,10 +577,20 @@ pub struct A2aEnableProtectionInput {
     #[serde(rename = "recoveryProximityPlacementGroupId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_proximity_placement_group_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aVmManagedDiskInputDetails>,
     #[doc = "The multi vm group name."]
     #[serde(rename = "multiVmGroupName", default, skip_serializing_if = "Option::is_none")]
@@ -810,7 +840,12 @@ pub struct A2aProtectedDiskDetails {
     #[serde(rename = "diskState", default, skip_serializing_if = "Option::is_none")]
     pub disk_state: Option<String>,
     #[doc = "The disk level operations list."]
-    #[serde(rename = "allowedDiskLevelOperation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedDiskLevelOperation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_disk_level_operation: Vec<String>,
     #[doc = "A value indicating whether vm has encrypted os disk or not."]
     #[serde(rename = "isDiskEncrypted", default, skip_serializing_if = "Option::is_none")]
@@ -907,7 +942,12 @@ pub struct A2aProtectedManagedDiskDetails {
     #[serde(rename = "diskState", default, skip_serializing_if = "Option::is_none")]
     pub disk_state: Option<String>,
     #[doc = "The disk level operations list."]
-    #[serde(rename = "allowedDiskLevelOperation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedDiskLevelOperation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_disk_level_operation: Vec<String>,
     #[doc = "A value indicating whether vm has encrypted os disk or not."]
     #[serde(rename = "isDiskEncrypted", default, skip_serializing_if = "Option::is_none")]
@@ -1137,7 +1177,11 @@ pub struct A2aRecoveryPointDetails {
     #[serde(rename = "recoveryPointSyncType", default, skip_serializing_if = "Option::is_none")]
     pub recovery_point_sync_type: Option<a2a_recovery_point_details::RecoveryPointSyncType>,
     #[doc = "List of disk ids representing a recovery point."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<String>,
 }
 impl A2aRecoveryPointDetails {
@@ -1197,10 +1241,20 @@ pub struct A2aRemoveDisksInput {
     #[serde(flatten)]
     pub remove_disks_provider_specific_input: RemoveDisksProviderSpecificInput,
     #[doc = "The list of vm disk vhd URIs."]
-    #[serde(rename = "vmDisksUris", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisksUris",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks_uris: Vec<String>,
     #[doc = "The list of vm managed disk Ids."]
-    #[serde(rename = "vmManagedDisksIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisksIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks_ids: Vec<String>,
 }
 impl A2aRemoveDisksInput {
@@ -1251,13 +1305,28 @@ pub struct A2aReplicationDetails {
     #[serde(rename = "managementId", default, skip_serializing_if = "Option::is_none")]
     pub management_id: Option<String>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<A2aProtectedDiskDetails>,
     #[doc = "The list of unprotected disks."]
-    #[serde(rename = "unprotectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "unprotectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unprotected_disks: Vec<A2aUnprotectedDiskDetails>,
     #[doc = "The list of protected managed disks."]
-    #[serde(rename = "protectedManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_managed_disks: Vec<A2aProtectedManagedDiskDetails>,
     #[doc = "The recovery boot diagnostic storage account Arm Id."]
     #[serde(rename = "recoveryBootDiagStorageAccountId", default, skip_serializing_if = "Option::is_none")]
@@ -1293,7 +1362,12 @@ pub struct A2aReplicationDetails {
     #[serde(rename = "selectedTfoAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub selected_tfo_azure_network_id: Option<String>,
     #[doc = "The virtual machine nic details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "Azure to Azure VM synced configuration details."]
     #[serde(rename = "vmSyncedConfigDetails", default, skip_serializing_if = "Option::is_none")]
@@ -1575,10 +1649,20 @@ pub struct A2aReplicationIntentDetails {
     #[serde(rename = "recoverySubscriptionId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_subscription_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aProtectionIntentDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aProtectionIntentManagedDiskInputDetails>,
     #[doc = "The recovery resource group id."]
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -1791,7 +1875,12 @@ pub struct A2aReprotectInput {
     #[serde(rename = "recoveryContainerId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_container_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The recovery resource group Id. Valid for V2 scenarios."]
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -1828,10 +1917,20 @@ pub struct A2aSwitchProtectionInput {
     #[serde(rename = "recoveryContainerId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_container_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aVmManagedDiskInputDetails>,
     #[doc = "The recovery resource group Id. Valid for V2 scenarios."]
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -2104,7 +2203,12 @@ pub struct A2aUpdateReplicationProtectedItemInput {
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_resource_group_id: Option<String>,
     #[doc = "Managed disk update details."]
-    #[serde(rename = "managedDiskUpdateDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedDiskUpdateDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_disk_update_details: Vec<A2aVmManagedDiskUpdateDetails>,
     #[doc = "The boot diagnostic storage account."]
     #[serde(rename = "recoveryBootDiagStorageAccountId", default, skip_serializing_if = "Option::is_none")]
@@ -2259,7 +2363,12 @@ pub struct AsrTask {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The state/actions applicable on this task."]
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
     #[doc = "The name."]
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
@@ -2280,7 +2389,11 @@ pub struct AsrTask {
     #[serde(rename = "groupTaskCustomDetails", default, skip_serializing_if = "Option::is_none")]
     pub group_task_custom_details: Option<GroupTaskDetails>,
     #[doc = "The task error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<JobErrorDetails>,
 }
 impl AsrTask {
@@ -2425,7 +2538,11 @@ pub struct AgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub fqdn: Option<String>,
     #[doc = "The disks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<AgentDiskDetails>,
 }
 impl AgentDetails {
@@ -2475,7 +2592,11 @@ impl Alert {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertCollection {
     #[doc = "The list of alerts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2499,7 +2620,12 @@ pub struct AlertProperties {
     #[serde(rename = "sendToOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_to_owners: Option<String>,
     #[doc = "The custom email address for sending emails."]
-    #[serde(rename = "customEmailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customEmailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_email_addresses: Vec<String>,
     #[doc = "The locale for the email notification."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2514,7 +2640,11 @@ impl AlertProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplianceCollection {
     #[doc = "The appliance details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationAppliance>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2682,10 +2812,19 @@ pub struct AzureFabricSpecificDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "The container Ids for the Azure fabric."]
-    #[serde(rename = "containerIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_ids: Vec<String>,
     #[doc = "The zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<A2aZoneDetails>,
 }
 impl AzureFabricSpecificDetails {
@@ -2760,7 +2899,12 @@ pub struct AzureToAzureVmSyncedConfigDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<serde_json::Value>,
     #[doc = "The Azure VM input endpoints."]
-    #[serde(rename = "inputEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_endpoints: Vec<InputEndpoint>,
 }
 impl AzureToAzureVmSyncedConfigDetails {
@@ -2853,7 +2997,12 @@ pub struct ConfigureAlertRequestProperties {
     #[serde(rename = "sendToOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_to_owners: Option<String>,
     #[doc = "The custom email address for sending emails."]
-    #[serde(rename = "customEmailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customEmailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_email_addresses: Vec<String>,
     #[doc = "The locale for the email notification."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2870,7 +3019,12 @@ pub struct ConsistencyCheckTaskDetails {
     #[serde(flatten)]
     pub task_type_details: TaskTypeDetails,
     #[doc = "The list of inconsistent Vm details."]
-    #[serde(rename = "vmDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_details: Vec<InconsistentVmDetails>,
 }
 impl ConsistencyCheckTaskDetails {
@@ -2954,7 +3108,12 @@ impl CreateProtectionContainerInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CreateProtectionContainerInputProperties {
     #[doc = "Provider specific inputs for container creation."]
-    #[serde(rename = "providerSpecificInput", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificInput",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_input: Vec<ReplicationProviderSpecificContainerCreationInput>,
 }
 impl CreateProtectionContainerInputProperties {
@@ -3054,7 +3213,12 @@ pub struct CreateRecoveryPlanInputProperties {
     #[doc = "The recovery plan groups."]
     pub groups: Vec<RecoveryPlanGroup>,
     #[doc = "The provider specific input."]
-    #[serde(rename = "providerSpecificInput", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificInput",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_input: Vec<RecoveryPlanProviderSpecificInput>,
 }
 impl CreateRecoveryPlanInputProperties {
@@ -3387,7 +3551,12 @@ pub struct DraDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<dra_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The count of protected items which are protected in forward direction."]
     #[serde(rename = "forwardProtectedItemCount", default, skip_serializing_if = "Option::is_none")]
@@ -3564,7 +3733,11 @@ impl Event {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventCollection {
     #[doc = "The list of events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Event>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3615,7 +3788,12 @@ pub struct EventProperties {
     #[serde(rename = "eventSpecificDetails", default, skip_serializing_if = "Option::is_none")]
     pub event_specific_details: Option<EventSpecificDetails>,
     #[doc = "The list of errors / warnings capturing details associated with the issue(s)."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl EventProperties {
@@ -3877,7 +4055,11 @@ impl Fabric {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FabricCollection {
     #[doc = "The fabric details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Fabric>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3940,7 +4122,12 @@ pub struct FabricProperties {
     #[serde(rename = "customDetails", default, skip_serializing_if = "Option::is_none")]
     pub custom_details: Option<FabricSpecificDetails>,
     #[doc = "Fabric health error details."]
-    #[serde(rename = "healthErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_error_details: Vec<HealthError>,
     #[doc = "Health of fabric."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4053,7 +4240,12 @@ pub struct FailoverJobDetails {
     #[serde(flatten)]
     pub job_details: JobDetails,
     #[doc = "The test VM details."]
-    #[serde(rename = "protectedItemDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedItemDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_item_details: Vec<FailoverReplicationProtectedItemDetails>,
 }
 impl FailoverJobDetails {
@@ -4089,7 +4281,12 @@ pub struct FailoverProcessServerRequestProperties {
     #[serde(rename = "targetProcessServerId", default, skip_serializing_if = "Option::is_none")]
     pub target_process_server_id: Option<String>,
     #[doc = "The VMS to migrate."]
-    #[serde(rename = "vmsToMigrate", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmsToMigrate",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vms_to_migrate: Vec<String>,
     #[doc = "A value for failover type. It can be systemlevel/serverlevel."]
     #[serde(rename = "updateType", default, skip_serializing_if = "Option::is_none")]
@@ -4143,7 +4340,12 @@ pub struct GroupTaskDetails {
     #[serde(rename = "instanceType")]
     pub instance_type: String,
     #[doc = "The child tasks."]
-    #[serde(rename = "childTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_tasks: Vec<AsrTask>,
 }
 impl GroupTaskDetails {
@@ -4158,7 +4360,12 @@ impl GroupTaskDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthError {
     #[doc = "The inner health errors. HealthError having a list of HealthError as child errors is problematic. InnerHealthError is used because this will prevent an infinite loop of structures when Hydra tries to auto-generate the contract. We are exposing the related health errors as inner health errors and all API consumers can utilize this in the same fashion as Exception -&gt; InnerException."]
-    #[serde(rename = "innerHealthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "innerHealthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inner_health_errors: Vec<InnerHealthError>,
     #[doc = "Source of error."]
     #[serde(rename = "errorSource", default, skip_serializing_if = "Option::is_none")]
@@ -4270,7 +4477,12 @@ pub struct HealthErrorSummary {
     #[serde(rename = "affectedResourceSubtype", default, skip_serializing_if = "Option::is_none")]
     pub affected_resource_subtype: Option<String>,
     #[doc = "The list of affected resource correlation Ids. This can be used to uniquely identify the count of items affected by a specific category and severity as well as count of item affected by an specific issue."]
-    #[serde(rename = "affectedResourceCorrelationIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "affectedResourceCorrelationIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub affected_resource_correlation_ids: Vec<String>,
 }
 impl HealthErrorSummary {
@@ -4583,7 +4795,12 @@ pub struct HyperVReplicaAzureEnableProtectionInput {
     #[serde(rename = "logStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub log_storage_account_id: Option<String>,
     #[doc = "The list of VHD Ids of disks to be protected."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
     #[doc = "The Id of the target resource group (for classic deployment) in which the failover VM is to be created."]
     #[serde(rename = "targetAzureV1ResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -4619,7 +4836,12 @@ pub struct HyperVReplicaAzureEnableProtectionInput {
     #[serde(rename = "diskType", default, skip_serializing_if = "Option::is_none")]
     pub disk_type: Option<hyper_v_replica_azure_enable_protection_input::DiskType>,
     #[doc = "The disks to include list for managed disks."]
-    #[serde(rename = "disksToIncludeForManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToIncludeForManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include_for_managed_disks: Vec<HyperVReplicaAzureDiskInputDetails>,
     #[doc = "The DiskEncryptionSet ARM Id."]
     #[serde(rename = "diskEncryptionSetId", default, skip_serializing_if = "Option::is_none")]
@@ -4958,7 +5180,12 @@ pub struct HyperVReplicaAzurePolicyInput {
     #[serde(rename = "onlineReplicationStartTime", default, skip_serializing_if = "Option::is_none")]
     pub online_replication_start_time: Option<String>,
     #[doc = "The list of storage accounts to which the VMs in the primary cloud can replicate to."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<String>,
 }
 impl HyperVReplicaAzurePolicyInput {
@@ -4979,7 +5206,12 @@ pub struct HyperVReplicaAzureReplicationDetails {
     #[serde(flatten)]
     pub replication_provider_specific_settings: ReplicationProviderSpecificSettings,
     #[doc = "Azure VM Disk details."]
-    #[serde(rename = "azureVmDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureVmDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_vm_disk_details: Vec<AzureVmDiskDetails>,
     #[doc = "Recovery Azure given name."]
     #[serde(rename = "recoveryAzureVmName", default, skip_serializing_if = "Option::is_none")]
@@ -5015,7 +5247,12 @@ pub struct HyperVReplicaAzureReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The selected recovery azure network Id."]
     #[serde(rename = "selectedRecoveryAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -5075,7 +5312,12 @@ pub struct HyperVReplicaAzureReplicationDetails {
     #[serde(rename = "targetNicTags", default, skip_serializing_if = "Option::is_none")]
     pub target_nic_tags: Option<serde_json::Value>,
     #[doc = "The list of protected managed disks."]
-    #[serde(rename = "protectedManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_managed_disks: Vec<HyperVReplicaAzureManagedDiskDetails>,
 }
 impl HyperVReplicaAzureReplicationDetails {
@@ -5241,7 +5483,12 @@ pub struct HyperVReplicaAzureUpdateReplicationProtectedItemInput {
     #[serde(rename = "sqlServerLicenseType", default, skip_serializing_if = "Option::is_none")]
     pub sql_server_license_type: Option<hyper_v_replica_azure_update_replication_protected_item_input::SqlServerLicenseType>,
     #[doc = "The list of disk update properties."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<UpdateDiskInput>,
 }
 impl HyperVReplicaAzureUpdateReplicationProtectedItemInput {
@@ -5403,7 +5650,12 @@ pub struct HyperVReplicaBaseReplicationDetails {
     #[serde(rename = "lastReplicatedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_replicated_time: Option<time::OffsetDateTime>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The virtual machine Id."]
     #[serde(rename = "vmId", default, skip_serializing_if = "Option::is_none")]
@@ -5418,7 +5670,12 @@ pub struct HyperVReplicaBaseReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "VM disk details."]
-    #[serde(rename = "vMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_m_disk_details: Vec<DiskDetails>,
 }
 impl HyperVReplicaBaseReplicationDetails {
@@ -5522,7 +5779,12 @@ pub struct HyperVReplicaBlueReplicationDetails {
     #[serde(rename = "lastReplicatedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_replicated_time: Option<time::OffsetDateTime>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The virtual machine Id."]
     #[serde(rename = "vmId", default, skip_serializing_if = "Option::is_none")]
@@ -5537,7 +5799,12 @@ pub struct HyperVReplicaBlueReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "VM disk details."]
-    #[serde(rename = "vMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_m_disk_details: Vec<DiskDetails>,
 }
 impl HyperVReplicaBlueReplicationDetails {
@@ -5677,7 +5944,12 @@ pub struct HyperVReplicaReplicationDetails {
     #[serde(rename = "lastReplicatedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_replicated_time: Option<time::OffsetDateTime>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The virtual machine Id."]
     #[serde(rename = "vmId", default, skip_serializing_if = "Option::is_none")]
@@ -5692,7 +5964,12 @@ pub struct HyperVReplicaReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "VM disk details."]
-    #[serde(rename = "vMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_m_disk_details: Vec<DiskDetails>,
 }
 impl HyperVReplicaReplicationDetails {
@@ -5715,7 +5992,12 @@ pub struct HyperVSiteDetails {
     #[serde(flatten)]
     pub fabric_specific_details: FabricSpecificDetails,
     #[doc = "The list of Hyper-V hosts associated with the fabric."]
-    #[serde(rename = "hyperVHosts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hyperVHosts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hyper_v_hosts: Vec<HyperVHostDetails>,
 }
 impl HyperVSiteDetails {
@@ -5741,7 +6023,12 @@ pub struct HyperVVirtualMachineDetails {
     #[serde(rename = "osDetails", default, skip_serializing_if = "Option::is_none")]
     pub os_details: Option<OsDetails>,
     #[doc = "The Last successful failover time."]
-    #[serde(rename = "diskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_details: Vec<DiskDetails>,
     #[doc = "A value indicating whether the VM has a physical disk attached. String value of SrsDataContract.PresenceStatus enum."]
     #[serde(rename = "hasPhysicalDisk", default, skip_serializing_if = "Option::is_none")]
@@ -5913,7 +6200,12 @@ pub struct IpConfigDetails {
     pub recovery_ip_address_type: Option<String>,
     #[serde(rename = "recoveryPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_public_ip_address_id: Option<String>,
-    #[serde(rename = "recoveryLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_lb_backend_address_pool_ids: Vec<String>,
     #[serde(rename = "tfoSubnetName", default, skip_serializing_if = "Option::is_none")]
     pub tfo_subnet_name: Option<String>,
@@ -5921,7 +6213,12 @@ pub struct IpConfigDetails {
     pub tfo_static_ip_address: Option<String>,
     #[serde(rename = "tfoPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub tfo_public_ip_address_id: Option<String>,
-    #[serde(rename = "tfoLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tfoLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tfo_lb_backend_address_pool_ids: Vec<String>,
 }
 impl IpConfigDetails {
@@ -5943,7 +6240,12 @@ pub struct IpConfigInputDetails {
     pub recovery_static_ip_address: Option<String>,
     #[serde(rename = "recoveryPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_public_ip_address_id: Option<String>,
-    #[serde(rename = "recoveryLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_lb_backend_address_pool_ids: Vec<String>,
     #[serde(rename = "tfoSubnetName", default, skip_serializing_if = "Option::is_none")]
     pub tfo_subnet_name: Option<String>,
@@ -5951,7 +6253,12 @@ pub struct IpConfigInputDetails {
     pub tfo_static_ip_address: Option<String>,
     #[serde(rename = "tfoPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub tfo_public_ip_address_id: Option<String>,
-    #[serde(rename = "tfoLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tfoLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tfo_lb_backend_address_pool_ids: Vec<String>,
 }
 impl IpConfigInputDetails {
@@ -6136,7 +6443,12 @@ pub struct InMageAzureV2EnableProtectionInput {
     #[serde(rename = "multiVmGroupName", default, skip_serializing_if = "Option::is_none")]
     pub multi_vm_group_name: Option<String>,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<InMageAzureV2DiskInputDetails>,
     #[doc = "The selected target Azure network Id."]
     #[serde(rename = "targetAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -6694,7 +7006,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "multiVmSyncStatus", default, skip_serializing_if = "Option::is_none")]
     pub multi_vm_sync_status: Option<String>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageAzureV2ProtectedDiskDetails>,
     #[doc = "A value indicating whether any disk is resized for this VM."]
     #[serde(rename = "diskResized", default, skip_serializing_if = "Option::is_none")]
@@ -6718,7 +7035,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "osDiskId", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_id: Option<String>,
     #[doc = "Azure VM Disk details."]
-    #[serde(rename = "azureVMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureVMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_vm_disk_details: Vec<AzureVmDiskDetails>,
     #[doc = "Recovery Azure given name."]
     #[serde(rename = "recoveryAzureVMName", default, skip_serializing_if = "Option::is_none")]
@@ -6733,7 +7055,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "recoveryAzureLogStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_azure_log_storage_account_id: Option<String>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The selected recovery azure network Id."]
     #[serde(rename = "selectedRecoveryAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -6751,7 +7078,11 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "enableRdpOnTargetOption", default, skip_serializing_if = "Option::is_none")]
     pub enable_rdp_on_target_option: Option<String>,
     #[doc = "The datastores of the on-premise machine. Value can be list of strings that contain datastore names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The ARM Id of the target Azure VM. This value will be null until the VM is failed over. Only after failure it will be populated with the ARM Id of the Azure VM."]
     #[serde(rename = "targetVmId", default, skip_serializing_if = "Option::is_none")]
@@ -6778,7 +7109,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "sqlServerLicenseType", default, skip_serializing_if = "Option::is_none")]
     pub sql_server_license_type: Option<String>,
     #[doc = "The validation errors of the on-premise machine Value can be list of validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
     #[doc = "The last RPO calculated time."]
     #[serde(rename = "lastRpoCalculatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -6793,7 +7129,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "osVersion", default, skip_serializing_if = "Option::is_none")]
     pub os_version: Option<String>,
     #[doc = "The list of protected managed disks."]
-    #[serde(rename = "protectedManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_managed_disks: Vec<InMageAzureV2ManagedDiskDetails>,
     #[doc = "The last recovery point received time."]
     #[serde(rename = "lastRecoveryPointReceived", default, with = "azure_core::date::rfc3339::option")]
@@ -6826,7 +7167,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "targetNicTags", default, skip_serializing_if = "Option::is_none")]
     pub target_nic_tags: Option<serde_json::Value>,
     #[doc = "The switch provider blocking error information."]
-    #[serde(rename = "switchProviderBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "switchProviderBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub switch_provider_blocking_error_details: Vec<InMageAzureV2SwitchProviderBlockingErrorDetails>,
     #[doc = "InMageAzureV2 switch provider details."]
     #[serde(rename = "switchProviderDetails", default, skip_serializing_if = "Option::is_none")]
@@ -6930,7 +7276,12 @@ pub struct InMageAzureV2ReprotectInput {
     #[serde(rename = "logStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub log_storage_account_id: Option<String>,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
 }
 impl InMageAzureV2ReprotectInput {
@@ -7092,7 +7443,12 @@ pub struct InMageAzureV2UpdateReplicationProtectedItemInput {
     #[serde(rename = "sqlServerLicenseType", default, skip_serializing_if = "Option::is_none")]
     pub sql_server_license_type: Option<in_mage_azure_v2_update_replication_protected_item_input::SqlServerLicenseType>,
     #[doc = "The list of disk update properties."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<UpdateDiskInput>,
 }
 impl InMageAzureV2UpdateReplicationProtectedItemInput {
@@ -7223,7 +7579,12 @@ pub struct InMageDiskDetails {
     #[serde(rename = "diskConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub disk_configuration: Option<String>,
     #[doc = "Volumes of the disk."]
-    #[serde(rename = "volumeList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_list: Vec<DiskVolumeDetails>,
 }
 impl InMageDiskDetails {
@@ -7235,10 +7596,20 @@ impl InMageDiskDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InMageDiskExclusionInput {
     #[doc = "The volume label based option for disk exclusion."]
-    #[serde(rename = "volumeOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_options: Vec<InMageVolumeExclusionOptions>,
     #[doc = "The guest disk signature based option for disk exclusion."]
-    #[serde(rename = "diskSignatureOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskSignatureOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_signature_options: Vec<InMageDiskSignatureExclusionOptions>,
 }
 impl InMageDiskExclusionInput {
@@ -7291,7 +7662,12 @@ pub struct InMageEnableProtectionInput {
     #[serde(rename = "diskExclusionInput", default, skip_serializing_if = "Option::is_none")]
     pub disk_exclusion_input: Option<InMageDiskExclusionInput>,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
 }
 impl InMageEnableProtectionInput {
@@ -7582,7 +7958,12 @@ pub struct InMageRcmApplianceDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub dra: Option<DraDetails>,
     #[doc = "The switch provider blocking error information."]
-    #[serde(rename = "switchProviderBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "switchProviderBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub switch_provider_blocking_error_details: Vec<InMageRcmFabricSwitchProviderBlockingErrorDetails>,
 }
 impl InMageRcmApplianceDetails {
@@ -7596,7 +7977,11 @@ pub struct InMageRcmApplianceSpecificDetails {
     #[serde(flatten)]
     pub appliance_specific_details: ApplianceSpecificDetails,
     #[doc = "The list of appliances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub appliances: Vec<InMageRcmApplianceDetails>,
 }
 impl InMageRcmApplianceSpecificDetails {
@@ -7634,10 +8019,19 @@ pub struct InMageRcmDiscoveredProtectedVmDetails {
     #[serde(rename = "vCenterFqdn", default, skip_serializing_if = "Option::is_none")]
     pub v_center_fqdn: Option<String>,
     #[doc = "The list of datastores."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The list of IP addresses."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "The VMware tools status."]
     #[serde(rename = "vmwareToolsStatus", default, skip_serializing_if = "Option::is_none")]
@@ -7816,7 +8210,12 @@ pub struct InMageRcmEnableProtectionInput {
     #[serde(rename = "fabricDiscoveryMachineId")]
     pub fabric_discovery_machine_id: String,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<InMageRcmDiskInput>,
     #[doc = "InMageRcm disk input."]
     #[serde(rename = "disksDefault", default, skip_serializing_if = "Option::is_none")]
@@ -8044,28 +8443,67 @@ pub struct InMageRcmFabricSpecificDetails {
     #[serde(rename = "sourceAgentIdentityDetails", default, skip_serializing_if = "Option::is_none")]
     pub source_agent_identity_details: Option<IdentityProviderDetails>,
     #[doc = "The list of process servers."]
-    #[serde(rename = "processServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "processServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub process_servers: Vec<ProcessServerDetails>,
     #[doc = "The list of RCM proxies."]
-    #[serde(rename = "rcmProxies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rcmProxies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rcm_proxies: Vec<RcmProxyDetails>,
     #[doc = "The list of push installers."]
-    #[serde(rename = "pushInstallers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pushInstallers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub push_installers: Vec<PushInstallerDetails>,
     #[doc = "The list of replication agents."]
-    #[serde(rename = "replicationAgents", default, skip_serializing_if = "Vec::is_empty")]
-    pub replication_agents: Vec<ReplicationAgentDetails>,
+    #[serde(
+        rename = "replicationAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
+    pub replication_agents: Vec<ReplicationAgentDetails>,
     #[doc = "The list of reprotect agents."]
-    #[serde(rename = "reprotectAgents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reprotectAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reprotect_agents: Vec<ReprotectAgentDetails>,
     #[doc = "The list of Mars agents."]
-    #[serde(rename = "marsAgents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "marsAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mars_agents: Vec<MarsAgentDetails>,
     #[doc = "The list of DRAs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dras: Vec<DraDetails>,
     #[doc = "The list of agent details."]
-    #[serde(rename = "agentDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_details: Vec<AgentDetails>,
 }
 impl InMageRcmFabricSpecificDetails {
@@ -8128,10 +8566,19 @@ pub struct InMageRcmFailbackDiscoveredProtectedVmDetails {
     #[serde(rename = "vCenterFqdn", default, skip_serializing_if = "Option::is_none")]
     pub v_center_fqdn: Option<String>,
     #[doc = "The list of datastores."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The list of IP addresses."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "The VMware tools status."]
     #[serde(rename = "vmwareToolsStatus", default, skip_serializing_if = "Option::is_none")]
@@ -8221,7 +8668,12 @@ pub struct InMageRcmFailbackMobilityAgentDetails {
     #[serde(rename = "lastHeartbeatUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_heartbeat_utc: Option<time::OffsetDateTime>,
     #[doc = "The whether update is possible or not."]
-    #[serde(rename = "reasonsBlockingUpgrade", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reasonsBlockingUpgrade",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons_blocking_upgrade: Vec<String>,
     #[doc = "A value indicating whether agent is upgradeable or not."]
     #[serde(rename = "isUpgradeable", default, skip_serializing_if = "Option::is_none")]
@@ -8463,13 +8915,23 @@ pub struct InMageRcmFailbackReplicationDetails {
     #[serde(rename = "resyncState", default, skip_serializing_if = "Option::is_none")]
     pub resync_state: Option<in_mage_rcm_failback_replication_details::ResyncState>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageRcmFailbackProtectedDiskDetails>,
     #[doc = "InMageRcmFailback mobility agent details."]
     #[serde(rename = "mobilityAgentDetails", default, skip_serializing_if = "Option::is_none")]
     pub mobility_agent_details: Option<InMageRcmFailbackMobilityAgentDetails>,
     #[doc = "The network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<InMageRcmFailbackNicDetails>,
     #[doc = "The last planned failover start time."]
     #[serde(rename = "lastPlannedFailoverStartTime", default, with = "azure_core::date::rfc3339::option")]
@@ -8860,7 +9322,12 @@ pub struct InMageRcmMobilityAgentDetails {
     #[serde(rename = "lastHeartbeatUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_heartbeat_utc: Option<time::OffsetDateTime>,
     #[doc = "The whether update is possible or not."]
-    #[serde(rename = "reasonsBlockingUpgrade", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reasonsBlockingUpgrade",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons_blocking_upgrade: Vec<String>,
     #[doc = "A value indicating whether agent is upgradeable or not."]
     #[serde(rename = "isUpgradeable", default, skip_serializing_if = "Option::is_none")]
@@ -9394,7 +9861,12 @@ pub struct InMageRcmReplicationDetails {
     #[serde(rename = "agentUpgradeAttemptToVersion", default, skip_serializing_if = "Option::is_none")]
     pub agent_upgrade_attempt_to_version: Option<String>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageRcmProtectedDiskDetails>,
     #[doc = "A value indicating whether last agent upgrade was successful or not."]
     #[serde(rename = "isLastUpgradeSuccessful", default, skip_serializing_if = "Option::is_none")]
@@ -9410,13 +9882,28 @@ pub struct InMageRcmReplicationDetails {
     #[serde(rename = "mobilityAgentDetails", default, skip_serializing_if = "Option::is_none")]
     pub mobility_agent_details: Option<InMageRcmMobilityAgentDetails>,
     #[doc = "The last agent upgrade error information."]
-    #[serde(rename = "lastAgentUpgradeErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "lastAgentUpgradeErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub last_agent_upgrade_error_details: Vec<InMageRcmLastAgentUpgradeErrorDetails>,
     #[doc = "The agent upgrade blocking error information."]
-    #[serde(rename = "agentUpgradeBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentUpgradeBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_upgrade_blocking_error_details: Vec<InMageRcmAgentUpgradeBlockingErrorDetails>,
     #[doc = "The network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<InMageRcmNicDetails>,
     #[doc = "InMageRcm discovered protected VM details."]
     #[serde(rename = "discoveredVmDetails", default, skip_serializing_if = "Option::is_none")]
@@ -9875,7 +10362,12 @@ pub struct InMageRcmUpdateReplicationProtectedItemInput {
     #[serde(rename = "testNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub test_network_id: Option<String>,
     #[doc = "The list of NIC details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<InMageRcmNicInput>,
     #[doc = "The license type."]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -9989,7 +10481,12 @@ pub struct InMageReplicationDetails {
     #[serde(rename = "rpoInSeconds", default, skip_serializing_if = "Option::is_none")]
     pub rpo_in_seconds: Option<i64>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageProtectedDiskDetails>,
     #[doc = "The source IP address."]
     #[serde(rename = "ipAddress", default, skip_serializing_if = "Option::is_none")]
@@ -10031,7 +10528,12 @@ pub struct InMageReplicationDetails {
     #[serde(rename = "infrastructureVmId", default, skip_serializing_if = "Option::is_none")]
     pub infrastructure_vm_id: Option<String>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "A value indicating the discovery type of the machine."]
     #[serde(rename = "discoveryType", default, skip_serializing_if = "Option::is_none")]
@@ -10040,10 +10542,19 @@ pub struct InMageReplicationDetails {
     #[serde(rename = "azureStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub azure_storage_account_id: Option<String>,
     #[doc = "The datastores of the on-premise machine Value can be list of strings that contain datastore names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The validation errors of the on-premise machine Value can be list of validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
     #[doc = "The last RPO calculated time."]
     #[serde(rename = "lastRpoCalculatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -10141,7 +10652,12 @@ pub struct InMageReprotectInput {
     #[serde(rename = "profileId")]
     pub profile_id: String,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
 }
 impl InMageReprotectInput {
@@ -10316,10 +10832,19 @@ pub struct InconsistentVmDetails {
     #[serde(rename = "cloudName", default, skip_serializing_if = "Option::is_none")]
     pub cloud_name: Option<String>,
     #[doc = "The list of details regarding state of the Protected Entity in SRS and On prem."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<String>,
     #[doc = "The list of error ids."]
-    #[serde(rename = "errorIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_ids: Vec<String>,
 }
 impl InconsistentVmDetails {
@@ -10348,7 +10873,12 @@ pub struct InlineWorkflowTaskDetails {
     #[serde(flatten)]
     pub group_task_details: GroupTaskDetails,
     #[doc = "The list of child workflow ids."]
-    #[serde(rename = "workflowIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "workflowIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub workflow_ids: Vec<String>,
 }
 impl InlineWorkflowTaskDetails {
@@ -10484,7 +11014,11 @@ impl Job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCollection {
     #[doc = "The list of jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10589,10 +11123,18 @@ pub struct JobProperties {
     #[serde(rename = "stateDescription", default, skip_serializing_if = "Option::is_none")]
     pub state_description: Option<String>,
     #[doc = "The tasks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks: Vec<AsrTask>,
     #[doc = "The errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<JobErrorDetails>,
     #[doc = "The start time."]
     #[serde(rename = "startTime", default, with = "azure_core::date::rfc3339::option")]
@@ -10601,7 +11143,12 @@ pub struct JobProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The Allowed action the job."]
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
     #[doc = "The affected Object Id."]
     #[serde(rename = "targetObjectId", default, skip_serializing_if = "Option::is_none")]
@@ -10775,7 +11322,11 @@ impl LogicalNetwork {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogicalNetworkCollection {
     #[doc = "The Logical Networks list details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogicalNetwork>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10866,7 +11417,12 @@ pub struct MarsAgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<mars_agent_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl MarsAgentDetails {
@@ -10943,16 +11499,36 @@ pub struct MasterTargetServer {
     #[serde(rename = "versionStatus", default, skip_serializing_if = "Option::is_none")]
     pub version_status: Option<String>,
     #[doc = "The retention volumes of Master target Server."]
-    #[serde(rename = "retentionVolumes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionVolumes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_volumes: Vec<RetentionVolume>,
     #[doc = "The list of data stores in the fabric."]
-    #[serde(rename = "dataStores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataStores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_stores: Vec<DataStore>,
     #[doc = "Validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
     #[doc = "Health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "Disk count of the master target."]
     #[serde(rename = "diskCount", default, skip_serializing_if = "Option::is_none")]
@@ -11034,7 +11610,11 @@ impl MigrationItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationItemCollection {
     #[doc = "The list of migration items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrationItem>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11085,10 +11665,20 @@ pub struct MigrationItemProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<migration_item_properties::Health>,
     #[doc = "The list of health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The allowed operations on the migration item based on the current migration state of the item."]
-    #[serde(rename = "allowedOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_operations: Vec<String>,
     #[doc = "Current job details of the migration item."]
     #[serde(rename = "currentJob", default, skip_serializing_if = "Option::is_none")]
@@ -11297,7 +11887,11 @@ impl MigrationRecoveryPoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationRecoveryPointCollection {
     #[doc = "The migration recovery point details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrationRecoveryPoint>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11407,7 +12001,11 @@ impl Network {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkCollection {
     #[doc = "The Networks list details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Network>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11442,7 +12040,11 @@ impl NetworkMapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkMappingCollection {
     #[doc = "The Network Mappings list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkMapping>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11514,7 +12116,11 @@ pub struct NetworkProperties {
     #[serde(rename = "fabricType", default, skip_serializing_if = "Option::is_none")]
     pub fabric_type: Option<String>,
     #[doc = "The List of subnets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<Subnet>,
     #[doc = "The Friendly Name."]
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
@@ -11715,7 +12321,11 @@ impl OperationsDiscovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsDiscoveryCollection {
     #[doc = "The ClientDiscovery details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDiscovery>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11797,7 +12407,11 @@ impl Policy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyCollection {
     #[doc = "The policy details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Policy>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11878,7 +12492,12 @@ pub struct ProcessServer {
     #[serde(rename = "versionStatus", default, skip_serializing_if = "Option::is_none")]
     pub version_status: Option<String>,
     #[doc = "The list of the mobility service updates available on the Process Server."]
-    #[serde(rename = "mobilityServiceUpdates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mobilityServiceUpdates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mobility_service_updates: Vec<MobilityServiceUpdate>,
     #[doc = "The agent generated Id."]
     #[serde(rename = "hostId", default, skip_serializing_if = "Option::is_none")]
@@ -11932,7 +12551,12 @@ pub struct ProcessServer {
     #[serde(rename = "osVersion", default, skip_serializing_if = "Option::is_none")]
     pub os_version: Option<String>,
     #[doc = "Health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "Agent expiry date."]
     #[serde(rename = "agentExpiryDate", default, with = "azure_core::date::rfc3339::option")]
@@ -12033,7 +12657,12 @@ pub struct ProcessServerDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub fqdn: Option<String>,
     #[doc = "The list of IP addresses for communicating with the RCM component."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "The version."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -12096,7 +12725,12 @@ pub struct ProcessServerDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<process_server_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The protected item count."]
     #[serde(rename = "protectedItemCount", default, skip_serializing_if = "Option::is_none")]
@@ -12418,7 +13052,11 @@ impl ProtectableItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProtectableItemCollection {
     #[doc = "The Protectable item details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectableItem>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12451,10 +13089,20 @@ pub struct ProtectableItemProperties {
     #[serde(rename = "recoveryServicesProviderId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_services_provider_id: Option<String>,
     #[doc = "The Current protection readiness errors."]
-    #[serde(rename = "protectionReadinessErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectionReadinessErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protection_readiness_errors: Vec<String>,
     #[doc = "The list of replication providers supported for the protectable item."]
-    #[serde(rename = "supportedReplicationProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedReplicationProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_replication_providers: Vec<String>,
     #[doc = "Replication provider specific settings."]
     #[serde(rename = "customDetails", default, skip_serializing_if = "Option::is_none")]
@@ -12568,7 +13216,11 @@ impl ProtectionContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProtectionContainerCollection {
     #[doc = "The Protection Container details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionContainer>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12615,7 +13267,11 @@ impl ProtectionContainerMapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProtectionContainerMappingCollection {
     #[doc = "List of container mappings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionContainerMapping>,
     #[doc = "Link to fetch rest of the data."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12648,7 +13304,12 @@ pub struct ProtectionContainerMappingProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<String>,
     #[doc = "Health error."]
-    #[serde(rename = "healthErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_error_details: Vec<HealthError>,
     #[doc = "Policy ARM Id."]
     #[serde(rename = "policyId", default, skip_serializing_if = "Option::is_none")]
@@ -12792,7 +13453,12 @@ pub struct PushInstallerDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<push_installer_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl PushInstallerDetails {
@@ -12875,7 +13541,12 @@ pub struct RcmProxyDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<rcm_proxy_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl RcmProxyDetails {
@@ -13231,7 +13902,11 @@ pub mod recovery_plan_automation_runbook_action_details {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoveryPlanCollection {
     #[doc = "The list of recovery plans."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryPlan>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13255,13 +13930,28 @@ pub struct RecoveryPlanGroup {
     #[serde(rename = "groupType")]
     pub group_type: recovery_plan_group::GroupType,
     #[doc = "The list of protected items."]
-    #[serde(rename = "replicationProtectedItems", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replicationProtectedItems",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replication_protected_items: Vec<RecoveryPlanProtectedItem>,
     #[doc = "The start group actions."]
-    #[serde(rename = "startGroupActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "startGroupActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub start_group_actions: Vec<RecoveryPlanAction>,
     #[doc = "The end group actions."]
-    #[serde(rename = "endGroupActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endGroupActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub end_group_actions: Vec<RecoveryPlanAction>,
 }
 impl RecoveryPlanGroup {
@@ -13813,7 +14503,12 @@ pub struct RecoveryPlanPlannedFailoverInputProperties {
     #[serde(rename = "failoverDirection")]
     pub failover_direction: recovery_plan_planned_failover_input_properties::FailoverDirection,
     #[doc = "The provider specific properties."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificFailoverInput>,
 }
 impl RecoveryPlanPlannedFailoverInputProperties {
@@ -13886,10 +14581,20 @@ pub struct RecoveryPlanProperties {
     #[serde(rename = "failoverDeploymentModel", default, skip_serializing_if = "Option::is_none")]
     pub failover_deployment_model: Option<String>,
     #[doc = "The list of replication providers."]
-    #[serde(rename = "replicationProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replicationProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replication_providers: Vec<String>,
     #[doc = "The list of allowed operations."]
-    #[serde(rename = "allowedOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_operations: Vec<String>,
     #[doc = "The start time of the last planned failover."]
     #[serde(rename = "lastPlannedFailoverTime", default, with = "azure_core::date::rfc3339::option")]
@@ -13910,10 +14615,19 @@ pub struct RecoveryPlanProperties {
     #[serde(rename = "currentScenarioStatusDescription", default, skip_serializing_if = "Option::is_none")]
     pub current_scenario_status_description: Option<String>,
     #[doc = "The recovery plan groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<RecoveryPlanGroup>,
     #[doc = "The provider id and provider specific details."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificDetails>,
 }
 impl RecoveryPlanProperties {
@@ -14100,7 +14814,12 @@ pub struct RecoveryPlanTestFailoverInputProperties {
     #[serde(rename = "networkId", default, skip_serializing_if = "Option::is_none")]
     pub network_id: Option<String>,
     #[doc = "The provider specific properties."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificFailoverInput>,
 }
 impl RecoveryPlanTestFailoverInputProperties {
@@ -14174,7 +14893,12 @@ pub struct RecoveryPlanUnplannedFailoverInputProperties {
     #[serde(rename = "sourceSiteOperations")]
     pub source_site_operations: recovery_plan_unplanned_failover_input_properties::SourceSiteOperations,
     #[doc = "The provider specific properties."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificFailoverInput>,
 }
 impl RecoveryPlanUnplannedFailoverInputProperties {
@@ -14284,7 +15008,11 @@ impl RecoveryPoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoveryPointCollection {
     #[doc = "The recovery point details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryPoint>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14361,7 +15089,11 @@ impl RecoveryServicesProvider {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoveryServicesProviderCollection {
     #[doc = "The Servers details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryServicesProvider>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14412,10 +15144,20 @@ pub struct RecoveryServicesProviderProperties {
     #[serde(rename = "protectedItemCount", default, skip_serializing_if = "Option::is_none")]
     pub protected_item_count: Option<i32>,
     #[doc = "The scenarios allowed on this provider."]
-    #[serde(rename = "allowedScenarios", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedScenarios",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_scenarios: Vec<String>,
     #[doc = "The recovery services provider health error details."]
-    #[serde(rename = "healthErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_error_details: Vec<HealthError>,
     #[doc = "The DRA Id."]
     #[serde(rename = "draIdentifier", default, skip_serializing_if = "Option::is_none")]
@@ -14575,7 +15317,12 @@ pub struct ReplicationAgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<replication_agent_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl ReplicationAgentDetails {
@@ -14676,7 +15423,11 @@ impl ReplicationEligibilityResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationEligibilityResultsCollection {
     #[doc = "The replication eligibility results details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationEligibilityResults>,
 }
 impl ReplicationEligibilityResultsCollection {
@@ -14715,7 +15466,11 @@ pub struct ReplicationEligibilityResultsProperties {
     #[serde(rename = "clientRequestId", default, skip_serializing_if = "Option::is_none")]
     pub client_request_id: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ReplicationEligibilityResultsErrorInfo>,
 }
 impl ReplicationEligibilityResultsProperties {
@@ -14752,7 +15507,11 @@ impl ReplicationProtectedItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationProtectedItemCollection {
     #[doc = "The Replication protected item details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationProtectedItem>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14832,7 +15591,12 @@ pub struct ReplicationProtectedItemProperties {
     #[serde(rename = "switchProviderStateDescription", default, skip_serializing_if = "Option::is_none")]
     pub switch_provider_state_description: Option<String>,
     #[doc = "The allowed operations on the Replication protected item."]
-    #[serde(rename = "allowedOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_operations: Vec<String>,
     #[doc = "The consolidated protection health for the VM taking any issues with SRS as well as all the replication units associated with the VM's replication group into account. This is a string representation of the ProtectionHealth enumeration."]
     #[serde(rename = "replicationHealth", default, skip_serializing_if = "Option::is_none")]
@@ -14841,7 +15605,12 @@ pub struct ReplicationProtectedItemProperties {
     #[serde(rename = "failoverHealth", default, skip_serializing_if = "Option::is_none")]
     pub failover_health: Option<String>,
     #[doc = "List of health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The ID of Policy governing this PE."]
     #[serde(rename = "policyId", default, skip_serializing_if = "Option::is_none")]
@@ -14894,7 +15663,11 @@ impl ReplicationProtectionIntent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationProtectionIntentCollection {
     #[doc = "The Replication protection intent details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationProtectionIntent>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15038,13 +15811,23 @@ pub struct ReprotectAgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<reprotect_agent_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The protected item count."]
     #[serde(rename = "protectedItemCount", default, skip_serializing_if = "Option::is_none")]
     pub protected_item_count: Option<i32>,
     #[doc = "The list of accessible datastores fetched from discovery."]
-    #[serde(rename = "accessibleDatastores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessibleDatastores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accessible_datastores: Vec<String>,
     #[doc = "The Vcenter Id."]
     #[serde(rename = "vcenterId", default, skip_serializing_if = "Option::is_none")]
@@ -15130,7 +15913,12 @@ impl ResolveHealthInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResolveHealthInputProperties {
     #[doc = "Health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<ResolveHealthError>,
 }
 impl ResolveHealthInputProperties {
@@ -15166,7 +15954,11 @@ pub struct ResourceHealthSummary {
     #[serde(rename = "resourceCount", default, skip_serializing_if = "Option::is_none")]
     pub resource_count: Option<i32>,
     #[doc = "The list of summary of health errors across the resources under the container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issues: Vec<HealthErrorSummary>,
     #[doc = "The categorized resource counts."]
     #[serde(rename = "categorizedResourceCounts", default, skip_serializing_if = "Option::is_none")]
@@ -15418,7 +16210,11 @@ impl StorageClassification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageClassificationCollection {
     #[doc = "The storage details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageClassification>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15453,7 +16249,11 @@ impl StorageClassificationMapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageClassificationMappingCollection {
     #[doc = "The storage details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageClassificationMapping>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15528,7 +16328,12 @@ pub struct Subnet {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "The list of addresses for the subnet."]
-    #[serde(rename = "addressList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_list: Vec<String>,
 }
 impl Subnet {
@@ -15546,7 +16351,12 @@ pub struct SupportedOsDetails {
     #[serde(rename = "osType", default, skip_serializing_if = "Option::is_none")]
     pub os_type: Option<String>,
     #[doc = "The list of version for operating system."]
-    #[serde(rename = "osVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "osVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub os_versions: Vec<OsVersionWrapper>,
 }
 impl SupportedOsDetails {
@@ -15558,7 +16368,12 @@ impl SupportedOsDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedOsProperties {
     #[doc = "The supported operating systems property list."]
-    #[serde(rename = "supportedOsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_os_list: Vec<SupportedOsProperty>,
 }
 impl SupportedOsProperties {
@@ -15573,7 +16388,12 @@ pub struct SupportedOsProperty {
     #[serde(rename = "instanceType", default, skip_serializing_if = "Option::is_none")]
     pub instance_type: Option<String>,
     #[doc = "The list of supported operating systems."]
-    #[serde(rename = "supportedOs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_os: Vec<SupportedOsDetails>,
 }
 impl SupportedOsProperty {
@@ -15715,7 +16535,11 @@ impl TargetComputeSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TargetComputeSizeCollection {
     #[doc = "The list of target compute sizes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TargetComputeSize>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15757,13 +16581,22 @@ pub struct TargetComputeSizeProperties {
     #[serde(rename = "maxNicsCount", default, skip_serializing_if = "Option::is_none")]
     pub max_nics_count: Option<i32>,
     #[doc = "The reasons why the target compute size is not applicable for the protected item."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ComputeSizeErrorDetails>,
     #[doc = "The value indicating whether the target compute size supports high Iops."]
     #[serde(rename = "highIopsSupported", default, skip_serializing_if = "Option::is_none")]
     pub high_iops_supported: Option<String>,
     #[doc = "The supported HyperV Generations."]
-    #[serde(rename = "hyperVGenerations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hyperVGenerations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hyper_v_generations: Vec<String>,
 }
 impl TargetComputeSizeProperties {
@@ -15859,7 +16692,12 @@ pub struct TestFailoverJobDetails {
     #[serde(rename = "networkType", default, skip_serializing_if = "Option::is_none")]
     pub network_type: Option<String>,
     #[doc = "The test VM details."]
-    #[serde(rename = "protectedItemDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedItemDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_item_details: Vec<FailoverReplicationProtectedItemDetails>,
 }
 impl TestFailoverJobDetails {
@@ -16202,7 +17040,11 @@ impl UpdateRecoveryPlanInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UpdateRecoveryPlanInputProperties {
     #[doc = "The recovery plan groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<RecoveryPlanGroup>,
 }
 impl UpdateRecoveryPlanInputProperties {
@@ -16244,7 +17086,12 @@ pub struct UpdateReplicationProtectedItemInputProperties {
     #[serde(rename = "enableRdpOnTargetOption", default, skip_serializing_if = "Option::is_none")]
     pub enable_rdp_on_target_option: Option<String>,
     #[doc = "The list of VM nic details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicInputDetails>,
     #[doc = "License type."]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -16369,7 +17216,11 @@ impl VCenter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VCenterCollection {
     #[doc = "The vCenter details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VCenter>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16420,7 +17271,12 @@ pub struct VCenterProperties {
     #[serde(rename = "fabricArmResourceName", default, skip_serializing_if = "Option::is_none")]
     pub fabric_arm_resource_name: Option<String>,
     #[doc = "The health errors for this VCenter."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl VCenterProperties {
@@ -16447,7 +17303,12 @@ pub struct VmNicDetails {
     #[serde(rename = "recoveryVMNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_vm_network_id: Option<String>,
     #[doc = "The IP configurations of the NIC."]
-    #[serde(rename = "ipConfigs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configs: Vec<IpConfigDetails>,
     #[doc = "Selection type for failover."]
     #[serde(rename = "selectionType", default, skip_serializing_if = "Option::is_none")]
@@ -16501,7 +17362,12 @@ pub struct VmNicInputDetails {
     #[serde(rename = "nicId", default, skip_serializing_if = "Option::is_none")]
     pub nic_id: Option<String>,
     #[doc = "The IP configurations to be used by NIC during test failover and failover."]
-    #[serde(rename = "ipConfigs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configs: Vec<IpConfigInputDetails>,
     #[doc = "Selection type for failover."]
     #[serde(rename = "selectionType", default, skip_serializing_if = "Option::is_none")]
@@ -16963,13 +17829,23 @@ pub struct VMwareCbtMigrationDetails {
     #[serde(rename = "targetVmTags", default, skip_serializing_if = "Option::is_none")]
     pub target_vm_tags: Option<serde_json::Value>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<VMwareCbtProtectedDiskDetails>,
     #[doc = "The target network Id."]
     #[serde(rename = "targetNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub target_network_id: Option<String>,
     #[doc = "The network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VMwareCbtNicDetails>,
     #[doc = "The tags for the target NICs."]
     #[serde(rename = "targetNicTags", default, skip_serializing_if = "Option::is_none")]
@@ -17487,7 +18363,12 @@ pub struct VMwareCbtTestMigrateInput {
     #[serde(rename = "networkId")]
     pub network_id: String,
     #[doc = "The list of NIC details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VMwareCbtNicInput>,
 }
 impl VMwareCbtTestMigrateInput {
@@ -17559,10 +18440,20 @@ pub struct VMwareCbtUpdateMigrationItemInput {
     #[serde(rename = "testNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub test_network_id: Option<String>,
     #[doc = "The list of NIC details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VMwareCbtNicInput>,
     #[doc = "The list of disk update properties."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<VMwareCbtUpdateDiskInput>,
     #[doc = "The license type."]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -17698,13 +18589,28 @@ pub struct VMwareDetails {
     #[serde(flatten)]
     pub fabric_specific_details: FabricSpecificDetails,
     #[doc = "The list of Process Servers associated with the fabric."]
-    #[serde(rename = "processServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "processServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub process_servers: Vec<ProcessServer>,
     #[doc = "The list of Master Target servers associated with the fabric."]
-    #[serde(rename = "masterTargetServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "masterTargetServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub master_target_servers: Vec<MasterTargetServer>,
     #[doc = "The list of run as accounts created on the server."]
-    #[serde(rename = "runAsAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "runAsAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub run_as_accounts: Vec<RunAsAccount>,
     #[doc = "The number of replication pairs configured in this CS."]
     #[serde(rename = "replicationPairCount", default, skip_serializing_if = "Option::is_none")]
@@ -17794,7 +18700,12 @@ pub struct VMwareDetails {
     #[serde(rename = "agentVersionDetails", default, skip_serializing_if = "Option::is_none")]
     pub agent_version_details: Option<VersionDetails>,
     #[doc = "The switch provider blocking error information."]
-    #[serde(rename = "switchProviderBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "switchProviderBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub switch_provider_blocking_error_details: Vec<InMageFabricSwitchProviderBlockingErrorDetails>,
 }
 impl VMwareDetails {
@@ -17886,7 +18797,12 @@ pub struct VMwareV2FabricSpecificDetails {
     #[serde(rename = "serviceContainerId", default, skip_serializing_if = "Option::is_none")]
     pub service_container_id: Option<String>,
     #[doc = "The list of process servers."]
-    #[serde(rename = "processServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "processServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub process_servers: Vec<ProcessServerDetails>,
 }
 impl VMwareV2FabricSpecificDetails {
@@ -17933,10 +18849,20 @@ pub struct VMwareVirtualMachineDetails {
     #[serde(rename = "discoveryType", default, skip_serializing_if = "Option::is_none")]
     pub discovery_type: Option<String>,
     #[doc = "The disk details."]
-    #[serde(rename = "diskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_details: Vec<InMageDiskDetails>,
     #[doc = "The validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
 }
 impl VMwareVirtualMachineDetails {
@@ -17974,7 +18900,12 @@ impl VaultHealthDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultHealthProperties {
     #[doc = "The list of errors on the vault."]
-    #[serde(rename = "vaultErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_errors: Vec<HealthError>,
     #[doc = "Base class to define the health summary of the resources contained under an Arm resource."]
     #[serde(rename = "protectedItemsHealth", default, skip_serializing_if = "Option::is_none")]
@@ -18009,7 +18940,11 @@ impl VaultSetting {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultSettingCollection {
     #[doc = "The list of vault setting."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VaultSetting>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/recoveryservicessiterecovery/src/package_2022_03/models.rs b/services/mgmt/recoveryservicessiterecovery/src/package_2022_03/models.rs
index b3a7be1751..948a13dd40 100644
--- a/services/mgmt/recoveryservicessiterecovery/src/package_2022_03/models.rs
+++ b/services/mgmt/recoveryservicessiterecovery/src/package_2022_03/models.rs
@@ -9,10 +9,20 @@ pub struct A2aAddDisksInput {
     #[serde(flatten)]
     pub add_disks_provider_specific_input: AddDisksProviderSpecificInput,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aVmManagedDiskInputDetails>,
 }
 impl A2aAddDisksInput {
@@ -209,10 +219,20 @@ pub struct A2aCreateProtectionIntentInput {
     #[serde(rename = "autoProtectionOfDataDisk", default, skip_serializing_if = "Option::is_none")]
     pub auto_protection_of_data_disk: Option<a2a_create_protection_intent_input::AutoProtectionOfDataDisk>,
     #[doc = "The list of vm disk inputs."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aProtectionIntentDiskInputDetails>,
     #[doc = "The list of vm managed disk inputs."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aProtectionIntentManagedDiskInputDetails>,
     #[doc = "The multi vm group name."]
     #[serde(rename = "multiVmGroupName", default, skip_serializing_if = "Option::is_none")]
@@ -557,10 +577,20 @@ pub struct A2aEnableProtectionInput {
     #[serde(rename = "recoveryProximityPlacementGroupId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_proximity_placement_group_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aVmManagedDiskInputDetails>,
     #[doc = "The multi vm group name."]
     #[serde(rename = "multiVmGroupName", default, skip_serializing_if = "Option::is_none")]
@@ -810,7 +840,12 @@ pub struct A2aProtectedDiskDetails {
     #[serde(rename = "diskState", default, skip_serializing_if = "Option::is_none")]
     pub disk_state: Option<String>,
     #[doc = "The disk level operations list."]
-    #[serde(rename = "allowedDiskLevelOperation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedDiskLevelOperation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_disk_level_operation: Vec<String>,
     #[doc = "A value indicating whether vm has encrypted os disk or not."]
     #[serde(rename = "isDiskEncrypted", default, skip_serializing_if = "Option::is_none")]
@@ -907,7 +942,12 @@ pub struct A2aProtectedManagedDiskDetails {
     #[serde(rename = "diskState", default, skip_serializing_if = "Option::is_none")]
     pub disk_state: Option<String>,
     #[doc = "The disk level operations list."]
-    #[serde(rename = "allowedDiskLevelOperation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedDiskLevelOperation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_disk_level_operation: Vec<String>,
     #[doc = "A value indicating whether vm has encrypted os disk or not."]
     #[serde(rename = "isDiskEncrypted", default, skip_serializing_if = "Option::is_none")]
@@ -1137,7 +1177,11 @@ pub struct A2aRecoveryPointDetails {
     #[serde(rename = "recoveryPointSyncType", default, skip_serializing_if = "Option::is_none")]
     pub recovery_point_sync_type: Option<a2a_recovery_point_details::RecoveryPointSyncType>,
     #[doc = "List of disk ids representing a recovery point."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<String>,
 }
 impl A2aRecoveryPointDetails {
@@ -1197,10 +1241,20 @@ pub struct A2aRemoveDisksInput {
     #[serde(flatten)]
     pub remove_disks_provider_specific_input: RemoveDisksProviderSpecificInput,
     #[doc = "The list of vm disk vhd URIs."]
-    #[serde(rename = "vmDisksUris", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisksUris",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks_uris: Vec<String>,
     #[doc = "The list of vm managed disk Ids."]
-    #[serde(rename = "vmManagedDisksIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisksIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks_ids: Vec<String>,
 }
 impl A2aRemoveDisksInput {
@@ -1251,13 +1305,28 @@ pub struct A2aReplicationDetails {
     #[serde(rename = "managementId", default, skip_serializing_if = "Option::is_none")]
     pub management_id: Option<String>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<A2aProtectedDiskDetails>,
     #[doc = "The list of unprotected disks."]
-    #[serde(rename = "unprotectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "unprotectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unprotected_disks: Vec<A2aUnprotectedDiskDetails>,
     #[doc = "The list of protected managed disks."]
-    #[serde(rename = "protectedManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_managed_disks: Vec<A2aProtectedManagedDiskDetails>,
     #[doc = "The recovery boot diagnostic storage account Arm Id."]
     #[serde(rename = "recoveryBootDiagStorageAccountId", default, skip_serializing_if = "Option::is_none")]
@@ -1293,7 +1362,12 @@ pub struct A2aReplicationDetails {
     #[serde(rename = "selectedTfoAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub selected_tfo_azure_network_id: Option<String>,
     #[doc = "The virtual machine nic details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "Azure to Azure VM synced configuration details."]
     #[serde(rename = "vmSyncedConfigDetails", default, skip_serializing_if = "Option::is_none")]
@@ -1575,10 +1649,20 @@ pub struct A2aReplicationIntentDetails {
     #[serde(rename = "recoverySubscriptionId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_subscription_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aProtectionIntentDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aProtectionIntentManagedDiskInputDetails>,
     #[doc = "The recovery resource group id."]
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -1791,7 +1875,12 @@ pub struct A2aReprotectInput {
     #[serde(rename = "recoveryContainerId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_container_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The recovery resource group Id. Valid for V2 scenarios."]
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -1828,10 +1917,20 @@ pub struct A2aSwitchProtectionInput {
     #[serde(rename = "recoveryContainerId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_container_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aVmManagedDiskInputDetails>,
     #[doc = "The recovery resource group Id. Valid for V2 scenarios."]
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -2104,7 +2203,12 @@ pub struct A2aUpdateReplicationProtectedItemInput {
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_resource_group_id: Option<String>,
     #[doc = "Managed disk update details."]
-    #[serde(rename = "managedDiskUpdateDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedDiskUpdateDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_disk_update_details: Vec<A2aVmManagedDiskUpdateDetails>,
     #[doc = "The boot diagnostic storage account."]
     #[serde(rename = "recoveryBootDiagStorageAccountId", default, skip_serializing_if = "Option::is_none")]
@@ -2259,7 +2363,12 @@ pub struct AsrTask {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The state/actions applicable on this task."]
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
     #[doc = "The name."]
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
@@ -2280,7 +2389,11 @@ pub struct AsrTask {
     #[serde(rename = "groupTaskCustomDetails", default, skip_serializing_if = "Option::is_none")]
     pub group_task_custom_details: Option<GroupTaskDetails>,
     #[doc = "The task error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<JobErrorDetails>,
 }
 impl AsrTask {
@@ -2425,7 +2538,11 @@ pub struct AgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub fqdn: Option<String>,
     #[doc = "The disks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<AgentDiskDetails>,
 }
 impl AgentDetails {
@@ -2475,7 +2592,11 @@ impl Alert {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertCollection {
     #[doc = "The list of alerts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2499,7 +2620,12 @@ pub struct AlertProperties {
     #[serde(rename = "sendToOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_to_owners: Option<String>,
     #[doc = "The custom email address for sending emails."]
-    #[serde(rename = "customEmailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customEmailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_email_addresses: Vec<String>,
     #[doc = "The locale for the email notification."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2514,7 +2640,11 @@ impl AlertProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplianceCollection {
     #[doc = "The appliance details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationAppliance>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2682,10 +2812,19 @@ pub struct AzureFabricSpecificDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "The container Ids for the Azure fabric."]
-    #[serde(rename = "containerIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_ids: Vec<String>,
     #[doc = "The zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<A2aZoneDetails>,
 }
 impl AzureFabricSpecificDetails {
@@ -2760,7 +2899,12 @@ pub struct AzureToAzureVmSyncedConfigDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<serde_json::Value>,
     #[doc = "The Azure VM input endpoints."]
-    #[serde(rename = "inputEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_endpoints: Vec<InputEndpoint>,
 }
 impl AzureToAzureVmSyncedConfigDetails {
@@ -2853,7 +2997,12 @@ pub struct ConfigureAlertRequestProperties {
     #[serde(rename = "sendToOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_to_owners: Option<String>,
     #[doc = "The custom email address for sending emails."]
-    #[serde(rename = "customEmailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customEmailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_email_addresses: Vec<String>,
     #[doc = "The locale for the email notification."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2870,7 +3019,12 @@ pub struct ConsistencyCheckTaskDetails {
     #[serde(flatten)]
     pub task_type_details: TaskTypeDetails,
     #[doc = "The list of inconsistent Vm details."]
-    #[serde(rename = "vmDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_details: Vec<InconsistentVmDetails>,
 }
 impl ConsistencyCheckTaskDetails {
@@ -2954,7 +3108,12 @@ impl CreateProtectionContainerInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CreateProtectionContainerInputProperties {
     #[doc = "Provider specific inputs for container creation."]
-    #[serde(rename = "providerSpecificInput", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificInput",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_input: Vec<ReplicationProviderSpecificContainerCreationInput>,
 }
 impl CreateProtectionContainerInputProperties {
@@ -3054,7 +3213,12 @@ pub struct CreateRecoveryPlanInputProperties {
     #[doc = "The recovery plan groups."]
     pub groups: Vec<RecoveryPlanGroup>,
     #[doc = "The provider specific input."]
-    #[serde(rename = "providerSpecificInput", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificInput",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_input: Vec<RecoveryPlanProviderSpecificInput>,
 }
 impl CreateRecoveryPlanInputProperties {
@@ -3387,7 +3551,12 @@ pub struct DraDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<dra_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The count of protected items which are protected in forward direction."]
     #[serde(rename = "forwardProtectedItemCount", default, skip_serializing_if = "Option::is_none")]
@@ -3564,7 +3733,11 @@ impl Event {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventCollection {
     #[doc = "The list of events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Event>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3615,7 +3788,12 @@ pub struct EventProperties {
     #[serde(rename = "eventSpecificDetails", default, skip_serializing_if = "Option::is_none")]
     pub event_specific_details: Option<EventSpecificDetails>,
     #[doc = "The list of errors / warnings capturing details associated with the issue(s)."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl EventProperties {
@@ -3877,7 +4055,11 @@ impl Fabric {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FabricCollection {
     #[doc = "The fabric details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Fabric>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3940,7 +4122,12 @@ pub struct FabricProperties {
     #[serde(rename = "customDetails", default, skip_serializing_if = "Option::is_none")]
     pub custom_details: Option<FabricSpecificDetails>,
     #[doc = "Fabric health error details."]
-    #[serde(rename = "healthErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_error_details: Vec<HealthError>,
     #[doc = "Health of fabric."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4053,7 +4240,12 @@ pub struct FailoverJobDetails {
     #[serde(flatten)]
     pub job_details: JobDetails,
     #[doc = "The test VM details."]
-    #[serde(rename = "protectedItemDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedItemDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_item_details: Vec<FailoverReplicationProtectedItemDetails>,
 }
 impl FailoverJobDetails {
@@ -4089,7 +4281,12 @@ pub struct FailoverProcessServerRequestProperties {
     #[serde(rename = "targetProcessServerId", default, skip_serializing_if = "Option::is_none")]
     pub target_process_server_id: Option<String>,
     #[doc = "The VMS to migrate."]
-    #[serde(rename = "vmsToMigrate", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmsToMigrate",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vms_to_migrate: Vec<String>,
     #[doc = "A value for failover type. It can be systemlevel/serverlevel."]
     #[serde(rename = "updateType", default, skip_serializing_if = "Option::is_none")]
@@ -4143,7 +4340,12 @@ pub struct GroupTaskDetails {
     #[serde(rename = "instanceType")]
     pub instance_type: String,
     #[doc = "The child tasks."]
-    #[serde(rename = "childTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_tasks: Vec<AsrTask>,
 }
 impl GroupTaskDetails {
@@ -4158,7 +4360,12 @@ impl GroupTaskDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthError {
     #[doc = "The inner health errors. HealthError having a list of HealthError as child errors is problematic. InnerHealthError is used because this will prevent an infinite loop of structures when Hydra tries to auto-generate the contract. We are exposing the related health errors as inner health errors and all API consumers can utilize this in the same fashion as Exception -&gt; InnerException."]
-    #[serde(rename = "innerHealthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "innerHealthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inner_health_errors: Vec<InnerHealthError>,
     #[doc = "Source of error."]
     #[serde(rename = "errorSource", default, skip_serializing_if = "Option::is_none")]
@@ -4270,7 +4477,12 @@ pub struct HealthErrorSummary {
     #[serde(rename = "affectedResourceSubtype", default, skip_serializing_if = "Option::is_none")]
     pub affected_resource_subtype: Option<String>,
     #[doc = "The list of affected resource correlation Ids. This can be used to uniquely identify the count of items affected by a specific category and severity as well as count of item affected by an specific issue."]
-    #[serde(rename = "affectedResourceCorrelationIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "affectedResourceCorrelationIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub affected_resource_correlation_ids: Vec<String>,
 }
 impl HealthErrorSummary {
@@ -4583,7 +4795,12 @@ pub struct HyperVReplicaAzureEnableProtectionInput {
     #[serde(rename = "logStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub log_storage_account_id: Option<String>,
     #[doc = "The list of VHD Ids of disks to be protected."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
     #[doc = "The Id of the target resource group (for classic deployment) in which the failover VM is to be created."]
     #[serde(rename = "targetAzureV1ResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -4619,7 +4836,12 @@ pub struct HyperVReplicaAzureEnableProtectionInput {
     #[serde(rename = "diskType", default, skip_serializing_if = "Option::is_none")]
     pub disk_type: Option<hyper_v_replica_azure_enable_protection_input::DiskType>,
     #[doc = "The disks to include list for managed disks."]
-    #[serde(rename = "disksToIncludeForManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToIncludeForManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include_for_managed_disks: Vec<HyperVReplicaAzureDiskInputDetails>,
     #[doc = "The DiskEncryptionSet ARM Id."]
     #[serde(rename = "diskEncryptionSetId", default, skip_serializing_if = "Option::is_none")]
@@ -4958,7 +5180,12 @@ pub struct HyperVReplicaAzurePolicyInput {
     #[serde(rename = "onlineReplicationStartTime", default, skip_serializing_if = "Option::is_none")]
     pub online_replication_start_time: Option<String>,
     #[doc = "The list of storage accounts to which the VMs in the primary cloud can replicate to."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<String>,
 }
 impl HyperVReplicaAzurePolicyInput {
@@ -4979,7 +5206,12 @@ pub struct HyperVReplicaAzureReplicationDetails {
     #[serde(flatten)]
     pub replication_provider_specific_settings: ReplicationProviderSpecificSettings,
     #[doc = "Azure VM Disk details."]
-    #[serde(rename = "azureVmDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureVmDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_vm_disk_details: Vec<AzureVmDiskDetails>,
     #[doc = "Recovery Azure given name."]
     #[serde(rename = "recoveryAzureVmName", default, skip_serializing_if = "Option::is_none")]
@@ -5015,7 +5247,12 @@ pub struct HyperVReplicaAzureReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The selected recovery azure network Id."]
     #[serde(rename = "selectedRecoveryAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -5075,7 +5312,12 @@ pub struct HyperVReplicaAzureReplicationDetails {
     #[serde(rename = "targetNicTags", default, skip_serializing_if = "Option::is_none")]
     pub target_nic_tags: Option<serde_json::Value>,
     #[doc = "The list of protected managed disks."]
-    #[serde(rename = "protectedManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_managed_disks: Vec<HyperVReplicaAzureManagedDiskDetails>,
 }
 impl HyperVReplicaAzureReplicationDetails {
@@ -5241,7 +5483,12 @@ pub struct HyperVReplicaAzureUpdateReplicationProtectedItemInput {
     #[serde(rename = "sqlServerLicenseType", default, skip_serializing_if = "Option::is_none")]
     pub sql_server_license_type: Option<hyper_v_replica_azure_update_replication_protected_item_input::SqlServerLicenseType>,
     #[doc = "The list of disk update properties."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<UpdateDiskInput>,
 }
 impl HyperVReplicaAzureUpdateReplicationProtectedItemInput {
@@ -5403,7 +5650,12 @@ pub struct HyperVReplicaBaseReplicationDetails {
     #[serde(rename = "lastReplicatedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_replicated_time: Option<time::OffsetDateTime>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The virtual machine Id."]
     #[serde(rename = "vmId", default, skip_serializing_if = "Option::is_none")]
@@ -5418,7 +5670,12 @@ pub struct HyperVReplicaBaseReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "VM disk details."]
-    #[serde(rename = "vMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_m_disk_details: Vec<DiskDetails>,
 }
 impl HyperVReplicaBaseReplicationDetails {
@@ -5522,7 +5779,12 @@ pub struct HyperVReplicaBlueReplicationDetails {
     #[serde(rename = "lastReplicatedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_replicated_time: Option<time::OffsetDateTime>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The virtual machine Id."]
     #[serde(rename = "vmId", default, skip_serializing_if = "Option::is_none")]
@@ -5537,7 +5799,12 @@ pub struct HyperVReplicaBlueReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "VM disk details."]
-    #[serde(rename = "vMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_m_disk_details: Vec<DiskDetails>,
 }
 impl HyperVReplicaBlueReplicationDetails {
@@ -5677,7 +5944,12 @@ pub struct HyperVReplicaReplicationDetails {
     #[serde(rename = "lastReplicatedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_replicated_time: Option<time::OffsetDateTime>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The virtual machine Id."]
     #[serde(rename = "vmId", default, skip_serializing_if = "Option::is_none")]
@@ -5692,7 +5964,12 @@ pub struct HyperVReplicaReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "VM disk details."]
-    #[serde(rename = "vMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_m_disk_details: Vec<DiskDetails>,
 }
 impl HyperVReplicaReplicationDetails {
@@ -5715,7 +5992,12 @@ pub struct HyperVSiteDetails {
     #[serde(flatten)]
     pub fabric_specific_details: FabricSpecificDetails,
     #[doc = "The list of Hyper-V hosts associated with the fabric."]
-    #[serde(rename = "hyperVHosts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hyperVHosts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hyper_v_hosts: Vec<HyperVHostDetails>,
 }
 impl HyperVSiteDetails {
@@ -5741,7 +6023,12 @@ pub struct HyperVVirtualMachineDetails {
     #[serde(rename = "osDetails", default, skip_serializing_if = "Option::is_none")]
     pub os_details: Option<OsDetails>,
     #[doc = "The Last successful failover time."]
-    #[serde(rename = "diskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_details: Vec<DiskDetails>,
     #[doc = "A value indicating whether the VM has a physical disk attached. String value of SrsDataContract.PresenceStatus enum."]
     #[serde(rename = "hasPhysicalDisk", default, skip_serializing_if = "Option::is_none")]
@@ -5913,7 +6200,12 @@ pub struct IpConfigDetails {
     pub recovery_ip_address_type: Option<String>,
     #[serde(rename = "recoveryPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_public_ip_address_id: Option<String>,
-    #[serde(rename = "recoveryLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_lb_backend_address_pool_ids: Vec<String>,
     #[serde(rename = "tfoSubnetName", default, skip_serializing_if = "Option::is_none")]
     pub tfo_subnet_name: Option<String>,
@@ -5921,7 +6213,12 @@ pub struct IpConfigDetails {
     pub tfo_static_ip_address: Option<String>,
     #[serde(rename = "tfoPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub tfo_public_ip_address_id: Option<String>,
-    #[serde(rename = "tfoLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tfoLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tfo_lb_backend_address_pool_ids: Vec<String>,
 }
 impl IpConfigDetails {
@@ -5943,7 +6240,12 @@ pub struct IpConfigInputDetails {
     pub recovery_static_ip_address: Option<String>,
     #[serde(rename = "recoveryPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_public_ip_address_id: Option<String>,
-    #[serde(rename = "recoveryLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_lb_backend_address_pool_ids: Vec<String>,
     #[serde(rename = "tfoSubnetName", default, skip_serializing_if = "Option::is_none")]
     pub tfo_subnet_name: Option<String>,
@@ -5951,7 +6253,12 @@ pub struct IpConfigInputDetails {
     pub tfo_static_ip_address: Option<String>,
     #[serde(rename = "tfoPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub tfo_public_ip_address_id: Option<String>,
-    #[serde(rename = "tfoLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tfoLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tfo_lb_backend_address_pool_ids: Vec<String>,
 }
 impl IpConfigInputDetails {
@@ -6136,7 +6443,12 @@ pub struct InMageAzureV2EnableProtectionInput {
     #[serde(rename = "multiVmGroupName", default, skip_serializing_if = "Option::is_none")]
     pub multi_vm_group_name: Option<String>,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<InMageAzureV2DiskInputDetails>,
     #[doc = "The selected target Azure network Id."]
     #[serde(rename = "targetAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -6694,7 +7006,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "multiVmSyncStatus", default, skip_serializing_if = "Option::is_none")]
     pub multi_vm_sync_status: Option<String>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageAzureV2ProtectedDiskDetails>,
     #[doc = "A value indicating whether any disk is resized for this VM."]
     #[serde(rename = "diskResized", default, skip_serializing_if = "Option::is_none")]
@@ -6718,7 +7035,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "osDiskId", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_id: Option<String>,
     #[doc = "Azure VM Disk details."]
-    #[serde(rename = "azureVMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureVMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_vm_disk_details: Vec<AzureVmDiskDetails>,
     #[doc = "Recovery Azure given name."]
     #[serde(rename = "recoveryAzureVMName", default, skip_serializing_if = "Option::is_none")]
@@ -6733,7 +7055,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "recoveryAzureLogStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_azure_log_storage_account_id: Option<String>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The selected recovery azure network Id."]
     #[serde(rename = "selectedRecoveryAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -6751,7 +7078,11 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "enableRdpOnTargetOption", default, skip_serializing_if = "Option::is_none")]
     pub enable_rdp_on_target_option: Option<String>,
     #[doc = "The datastores of the on-premise machine. Value can be list of strings that contain datastore names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The ARM Id of the target Azure VM. This value will be null until the VM is failed over. Only after failure it will be populated with the ARM Id of the Azure VM."]
     #[serde(rename = "targetVmId", default, skip_serializing_if = "Option::is_none")]
@@ -6778,7 +7109,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "sqlServerLicenseType", default, skip_serializing_if = "Option::is_none")]
     pub sql_server_license_type: Option<String>,
     #[doc = "The validation errors of the on-premise machine Value can be list of validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
     #[doc = "The last RPO calculated time."]
     #[serde(rename = "lastRpoCalculatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -6793,7 +7129,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "osVersion", default, skip_serializing_if = "Option::is_none")]
     pub os_version: Option<String>,
     #[doc = "The list of protected managed disks."]
-    #[serde(rename = "protectedManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_managed_disks: Vec<InMageAzureV2ManagedDiskDetails>,
     #[doc = "The last recovery point received time."]
     #[serde(rename = "lastRecoveryPointReceived", default, with = "azure_core::date::rfc3339::option")]
@@ -6826,7 +7167,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "targetNicTags", default, skip_serializing_if = "Option::is_none")]
     pub target_nic_tags: Option<serde_json::Value>,
     #[doc = "The switch provider blocking error information."]
-    #[serde(rename = "switchProviderBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "switchProviderBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub switch_provider_blocking_error_details: Vec<InMageAzureV2SwitchProviderBlockingErrorDetails>,
     #[doc = "InMageAzureV2 switch provider details."]
     #[serde(rename = "switchProviderDetails", default, skip_serializing_if = "Option::is_none")]
@@ -6930,7 +7276,12 @@ pub struct InMageAzureV2ReprotectInput {
     #[serde(rename = "logStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub log_storage_account_id: Option<String>,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
 }
 impl InMageAzureV2ReprotectInput {
@@ -7092,7 +7443,12 @@ pub struct InMageAzureV2UpdateReplicationProtectedItemInput {
     #[serde(rename = "sqlServerLicenseType", default, skip_serializing_if = "Option::is_none")]
     pub sql_server_license_type: Option<in_mage_azure_v2_update_replication_protected_item_input::SqlServerLicenseType>,
     #[doc = "The list of disk update properties."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<UpdateDiskInput>,
 }
 impl InMageAzureV2UpdateReplicationProtectedItemInput {
@@ -7223,7 +7579,12 @@ pub struct InMageDiskDetails {
     #[serde(rename = "diskConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub disk_configuration: Option<String>,
     #[doc = "Volumes of the disk."]
-    #[serde(rename = "volumeList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_list: Vec<DiskVolumeDetails>,
 }
 impl InMageDiskDetails {
@@ -7235,10 +7596,20 @@ impl InMageDiskDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InMageDiskExclusionInput {
     #[doc = "The volume label based option for disk exclusion."]
-    #[serde(rename = "volumeOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_options: Vec<InMageVolumeExclusionOptions>,
     #[doc = "The guest disk signature based option for disk exclusion."]
-    #[serde(rename = "diskSignatureOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskSignatureOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_signature_options: Vec<InMageDiskSignatureExclusionOptions>,
 }
 impl InMageDiskExclusionInput {
@@ -7291,7 +7662,12 @@ pub struct InMageEnableProtectionInput {
     #[serde(rename = "diskExclusionInput", default, skip_serializing_if = "Option::is_none")]
     pub disk_exclusion_input: Option<InMageDiskExclusionInput>,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
 }
 impl InMageEnableProtectionInput {
@@ -7582,7 +7958,12 @@ pub struct InMageRcmApplianceDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub dra: Option<DraDetails>,
     #[doc = "The switch provider blocking error information."]
-    #[serde(rename = "switchProviderBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "switchProviderBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub switch_provider_blocking_error_details: Vec<InMageRcmFabricSwitchProviderBlockingErrorDetails>,
 }
 impl InMageRcmApplianceDetails {
@@ -7596,7 +7977,11 @@ pub struct InMageRcmApplianceSpecificDetails {
     #[serde(flatten)]
     pub appliance_specific_details: ApplianceSpecificDetails,
     #[doc = "The list of appliances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub appliances: Vec<InMageRcmApplianceDetails>,
 }
 impl InMageRcmApplianceSpecificDetails {
@@ -7634,10 +8019,19 @@ pub struct InMageRcmDiscoveredProtectedVmDetails {
     #[serde(rename = "vCenterFqdn", default, skip_serializing_if = "Option::is_none")]
     pub v_center_fqdn: Option<String>,
     #[doc = "The list of datastores."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The list of IP addresses."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "The VMware tools status."]
     #[serde(rename = "vmwareToolsStatus", default, skip_serializing_if = "Option::is_none")]
@@ -7816,7 +8210,12 @@ pub struct InMageRcmEnableProtectionInput {
     #[serde(rename = "fabricDiscoveryMachineId")]
     pub fabric_discovery_machine_id: String,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<InMageRcmDiskInput>,
     #[doc = "InMageRcm disk input."]
     #[serde(rename = "disksDefault", default, skip_serializing_if = "Option::is_none")]
@@ -8044,28 +8443,67 @@ pub struct InMageRcmFabricSpecificDetails {
     #[serde(rename = "sourceAgentIdentityDetails", default, skip_serializing_if = "Option::is_none")]
     pub source_agent_identity_details: Option<IdentityProviderDetails>,
     #[doc = "The list of process servers."]
-    #[serde(rename = "processServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "processServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub process_servers: Vec<ProcessServerDetails>,
     #[doc = "The list of RCM proxies."]
-    #[serde(rename = "rcmProxies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rcmProxies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rcm_proxies: Vec<RcmProxyDetails>,
     #[doc = "The list of push installers."]
-    #[serde(rename = "pushInstallers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pushInstallers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub push_installers: Vec<PushInstallerDetails>,
     #[doc = "The list of replication agents."]
-    #[serde(rename = "replicationAgents", default, skip_serializing_if = "Vec::is_empty")]
-    pub replication_agents: Vec<ReplicationAgentDetails>,
+    #[serde(
+        rename = "replicationAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
+    pub replication_agents: Vec<ReplicationAgentDetails>,
     #[doc = "The list of reprotect agents."]
-    #[serde(rename = "reprotectAgents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reprotectAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reprotect_agents: Vec<ReprotectAgentDetails>,
     #[doc = "The list of Mars agents."]
-    #[serde(rename = "marsAgents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "marsAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mars_agents: Vec<MarsAgentDetails>,
     #[doc = "The list of DRAs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dras: Vec<DraDetails>,
     #[doc = "The list of agent details."]
-    #[serde(rename = "agentDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_details: Vec<AgentDetails>,
 }
 impl InMageRcmFabricSpecificDetails {
@@ -8128,10 +8566,19 @@ pub struct InMageRcmFailbackDiscoveredProtectedVmDetails {
     #[serde(rename = "vCenterFqdn", default, skip_serializing_if = "Option::is_none")]
     pub v_center_fqdn: Option<String>,
     #[doc = "The list of datastores."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The list of IP addresses."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "The VMware tools status."]
     #[serde(rename = "vmwareToolsStatus", default, skip_serializing_if = "Option::is_none")]
@@ -8221,7 +8668,12 @@ pub struct InMageRcmFailbackMobilityAgentDetails {
     #[serde(rename = "lastHeartbeatUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_heartbeat_utc: Option<time::OffsetDateTime>,
     #[doc = "The whether update is possible or not."]
-    #[serde(rename = "reasonsBlockingUpgrade", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reasonsBlockingUpgrade",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons_blocking_upgrade: Vec<String>,
     #[doc = "A value indicating whether agent is upgradeable or not."]
     #[serde(rename = "isUpgradeable", default, skip_serializing_if = "Option::is_none")]
@@ -8463,13 +8915,23 @@ pub struct InMageRcmFailbackReplicationDetails {
     #[serde(rename = "resyncState", default, skip_serializing_if = "Option::is_none")]
     pub resync_state: Option<in_mage_rcm_failback_replication_details::ResyncState>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageRcmFailbackProtectedDiskDetails>,
     #[doc = "InMageRcmFailback mobility agent details."]
     #[serde(rename = "mobilityAgentDetails", default, skip_serializing_if = "Option::is_none")]
     pub mobility_agent_details: Option<InMageRcmFailbackMobilityAgentDetails>,
     #[doc = "The network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<InMageRcmFailbackNicDetails>,
     #[doc = "The last planned failover start time."]
     #[serde(rename = "lastPlannedFailoverStartTime", default, with = "azure_core::date::rfc3339::option")]
@@ -8860,7 +9322,12 @@ pub struct InMageRcmMobilityAgentDetails {
     #[serde(rename = "lastHeartbeatUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_heartbeat_utc: Option<time::OffsetDateTime>,
     #[doc = "The whether update is possible or not."]
-    #[serde(rename = "reasonsBlockingUpgrade", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reasonsBlockingUpgrade",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons_blocking_upgrade: Vec<String>,
     #[doc = "A value indicating whether agent is upgradeable or not."]
     #[serde(rename = "isUpgradeable", default, skip_serializing_if = "Option::is_none")]
@@ -9394,7 +9861,12 @@ pub struct InMageRcmReplicationDetails {
     #[serde(rename = "agentUpgradeAttemptToVersion", default, skip_serializing_if = "Option::is_none")]
     pub agent_upgrade_attempt_to_version: Option<String>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageRcmProtectedDiskDetails>,
     #[doc = "A value indicating whether last agent upgrade was successful or not."]
     #[serde(rename = "isLastUpgradeSuccessful", default, skip_serializing_if = "Option::is_none")]
@@ -9410,13 +9882,28 @@ pub struct InMageRcmReplicationDetails {
     #[serde(rename = "mobilityAgentDetails", default, skip_serializing_if = "Option::is_none")]
     pub mobility_agent_details: Option<InMageRcmMobilityAgentDetails>,
     #[doc = "The last agent upgrade error information."]
-    #[serde(rename = "lastAgentUpgradeErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "lastAgentUpgradeErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub last_agent_upgrade_error_details: Vec<InMageRcmLastAgentUpgradeErrorDetails>,
     #[doc = "The agent upgrade blocking error information."]
-    #[serde(rename = "agentUpgradeBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentUpgradeBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_upgrade_blocking_error_details: Vec<InMageRcmAgentUpgradeBlockingErrorDetails>,
     #[doc = "The network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<InMageRcmNicDetails>,
     #[doc = "InMageRcm discovered protected VM details."]
     #[serde(rename = "discoveredVmDetails", default, skip_serializing_if = "Option::is_none")]
@@ -9875,7 +10362,12 @@ pub struct InMageRcmUpdateReplicationProtectedItemInput {
     #[serde(rename = "testNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub test_network_id: Option<String>,
     #[doc = "The list of NIC details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<InMageRcmNicInput>,
     #[doc = "The license type."]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -9989,7 +10481,12 @@ pub struct InMageReplicationDetails {
     #[serde(rename = "rpoInSeconds", default, skip_serializing_if = "Option::is_none")]
     pub rpo_in_seconds: Option<i64>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageProtectedDiskDetails>,
     #[doc = "The source IP address."]
     #[serde(rename = "ipAddress", default, skip_serializing_if = "Option::is_none")]
@@ -10031,7 +10528,12 @@ pub struct InMageReplicationDetails {
     #[serde(rename = "infrastructureVmId", default, skip_serializing_if = "Option::is_none")]
     pub infrastructure_vm_id: Option<String>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "A value indicating the discovery type of the machine."]
     #[serde(rename = "discoveryType", default, skip_serializing_if = "Option::is_none")]
@@ -10040,10 +10542,19 @@ pub struct InMageReplicationDetails {
     #[serde(rename = "azureStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub azure_storage_account_id: Option<String>,
     #[doc = "The datastores of the on-premise machine Value can be list of strings that contain datastore names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The validation errors of the on-premise machine Value can be list of validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
     #[doc = "The last RPO calculated time."]
     #[serde(rename = "lastRpoCalculatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -10141,7 +10652,12 @@ pub struct InMageReprotectInput {
     #[serde(rename = "profileId")]
     pub profile_id: String,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
 }
 impl InMageReprotectInput {
@@ -10316,10 +10832,19 @@ pub struct InconsistentVmDetails {
     #[serde(rename = "cloudName", default, skip_serializing_if = "Option::is_none")]
     pub cloud_name: Option<String>,
     #[doc = "The list of details regarding state of the Protected Entity in SRS and On prem."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<String>,
     #[doc = "The list of error ids."]
-    #[serde(rename = "errorIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_ids: Vec<String>,
 }
 impl InconsistentVmDetails {
@@ -10348,7 +10873,12 @@ pub struct InlineWorkflowTaskDetails {
     #[serde(flatten)]
     pub group_task_details: GroupTaskDetails,
     #[doc = "The list of child workflow ids."]
-    #[serde(rename = "workflowIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "workflowIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub workflow_ids: Vec<String>,
 }
 impl InlineWorkflowTaskDetails {
@@ -10484,7 +11014,11 @@ impl Job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCollection {
     #[doc = "The list of jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10589,10 +11123,18 @@ pub struct JobProperties {
     #[serde(rename = "stateDescription", default, skip_serializing_if = "Option::is_none")]
     pub state_description: Option<String>,
     #[doc = "The tasks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks: Vec<AsrTask>,
     #[doc = "The errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<JobErrorDetails>,
     #[doc = "The start time."]
     #[serde(rename = "startTime", default, with = "azure_core::date::rfc3339::option")]
@@ -10601,7 +11143,12 @@ pub struct JobProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The Allowed action the job."]
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
     #[doc = "The affected Object Id."]
     #[serde(rename = "targetObjectId", default, skip_serializing_if = "Option::is_none")]
@@ -10775,7 +11322,11 @@ impl LogicalNetwork {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogicalNetworkCollection {
     #[doc = "The Logical Networks list details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogicalNetwork>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10866,7 +11417,12 @@ pub struct MarsAgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<mars_agent_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl MarsAgentDetails {
@@ -10943,16 +11499,36 @@ pub struct MasterTargetServer {
     #[serde(rename = "versionStatus", default, skip_serializing_if = "Option::is_none")]
     pub version_status: Option<String>,
     #[doc = "The retention volumes of Master target Server."]
-    #[serde(rename = "retentionVolumes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionVolumes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_volumes: Vec<RetentionVolume>,
     #[doc = "The list of data stores in the fabric."]
-    #[serde(rename = "dataStores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataStores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_stores: Vec<DataStore>,
     #[doc = "Validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
     #[doc = "Health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "Disk count of the master target."]
     #[serde(rename = "diskCount", default, skip_serializing_if = "Option::is_none")]
@@ -11034,7 +11610,11 @@ impl MigrationItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationItemCollection {
     #[doc = "The list of migration items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrationItem>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11085,10 +11665,20 @@ pub struct MigrationItemProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<migration_item_properties::Health>,
     #[doc = "The list of health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The allowed operations on the migration item based on the current migration state of the item."]
-    #[serde(rename = "allowedOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_operations: Vec<String>,
     #[doc = "Current job details of the migration item."]
     #[serde(rename = "currentJob", default, skip_serializing_if = "Option::is_none")]
@@ -11297,7 +11887,11 @@ impl MigrationRecoveryPoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationRecoveryPointCollection {
     #[doc = "The migration recovery point details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrationRecoveryPoint>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11407,7 +12001,11 @@ impl Network {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkCollection {
     #[doc = "The Networks list details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Network>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11442,7 +12040,11 @@ impl NetworkMapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkMappingCollection {
     #[doc = "The Network Mappings list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkMapping>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11514,7 +12116,11 @@ pub struct NetworkProperties {
     #[serde(rename = "fabricType", default, skip_serializing_if = "Option::is_none")]
     pub fabric_type: Option<String>,
     #[doc = "The List of subnets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<Subnet>,
     #[doc = "The Friendly Name."]
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
@@ -11715,7 +12321,11 @@ impl OperationsDiscovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsDiscoveryCollection {
     #[doc = "The ClientDiscovery details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDiscovery>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11797,7 +12407,11 @@ impl Policy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyCollection {
     #[doc = "The policy details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Policy>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11878,7 +12492,12 @@ pub struct ProcessServer {
     #[serde(rename = "versionStatus", default, skip_serializing_if = "Option::is_none")]
     pub version_status: Option<String>,
     #[doc = "The list of the mobility service updates available on the Process Server."]
-    #[serde(rename = "mobilityServiceUpdates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mobilityServiceUpdates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mobility_service_updates: Vec<MobilityServiceUpdate>,
     #[doc = "The agent generated Id."]
     #[serde(rename = "hostId", default, skip_serializing_if = "Option::is_none")]
@@ -11932,7 +12551,12 @@ pub struct ProcessServer {
     #[serde(rename = "osVersion", default, skip_serializing_if = "Option::is_none")]
     pub os_version: Option<String>,
     #[doc = "Health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "Agent expiry date."]
     #[serde(rename = "agentExpiryDate", default, with = "azure_core::date::rfc3339::option")]
@@ -12033,7 +12657,12 @@ pub struct ProcessServerDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub fqdn: Option<String>,
     #[doc = "The list of IP addresses for communicating with the RCM component."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "The version."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -12096,7 +12725,12 @@ pub struct ProcessServerDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<process_server_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The protected item count."]
     #[serde(rename = "protectedItemCount", default, skip_serializing_if = "Option::is_none")]
@@ -12418,7 +13052,11 @@ impl ProtectableItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProtectableItemCollection {
     #[doc = "The Protectable item details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectableItem>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12451,10 +13089,20 @@ pub struct ProtectableItemProperties {
     #[serde(rename = "recoveryServicesProviderId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_services_provider_id: Option<String>,
     #[doc = "The Current protection readiness errors."]
-    #[serde(rename = "protectionReadinessErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectionReadinessErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protection_readiness_errors: Vec<String>,
     #[doc = "The list of replication providers supported for the protectable item."]
-    #[serde(rename = "supportedReplicationProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedReplicationProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_replication_providers: Vec<String>,
     #[doc = "Replication provider specific settings."]
     #[serde(rename = "customDetails", default, skip_serializing_if = "Option::is_none")]
@@ -12568,7 +13216,11 @@ impl ProtectionContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProtectionContainerCollection {
     #[doc = "The Protection Container details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionContainer>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12615,7 +13267,11 @@ impl ProtectionContainerMapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProtectionContainerMappingCollection {
     #[doc = "List of container mappings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionContainerMapping>,
     #[doc = "Link to fetch rest of the data."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12648,7 +13304,12 @@ pub struct ProtectionContainerMappingProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<String>,
     #[doc = "Health error."]
-    #[serde(rename = "healthErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_error_details: Vec<HealthError>,
     #[doc = "Policy ARM Id."]
     #[serde(rename = "policyId", default, skip_serializing_if = "Option::is_none")]
@@ -12792,7 +13453,12 @@ pub struct PushInstallerDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<push_installer_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl PushInstallerDetails {
@@ -12875,7 +13541,12 @@ pub struct RcmProxyDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<rcm_proxy_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl RcmProxyDetails {
@@ -13231,7 +13902,11 @@ pub mod recovery_plan_automation_runbook_action_details {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoveryPlanCollection {
     #[doc = "The list of recovery plans."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryPlan>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13255,13 +13930,28 @@ pub struct RecoveryPlanGroup {
     #[serde(rename = "groupType")]
     pub group_type: recovery_plan_group::GroupType,
     #[doc = "The list of protected items."]
-    #[serde(rename = "replicationProtectedItems", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replicationProtectedItems",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replication_protected_items: Vec<RecoveryPlanProtectedItem>,
     #[doc = "The start group actions."]
-    #[serde(rename = "startGroupActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "startGroupActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub start_group_actions: Vec<RecoveryPlanAction>,
     #[doc = "The end group actions."]
-    #[serde(rename = "endGroupActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endGroupActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub end_group_actions: Vec<RecoveryPlanAction>,
 }
 impl RecoveryPlanGroup {
@@ -13813,7 +14503,12 @@ pub struct RecoveryPlanPlannedFailoverInputProperties {
     #[serde(rename = "failoverDirection")]
     pub failover_direction: recovery_plan_planned_failover_input_properties::FailoverDirection,
     #[doc = "The provider specific properties."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificFailoverInput>,
 }
 impl RecoveryPlanPlannedFailoverInputProperties {
@@ -13886,10 +14581,20 @@ pub struct RecoveryPlanProperties {
     #[serde(rename = "failoverDeploymentModel", default, skip_serializing_if = "Option::is_none")]
     pub failover_deployment_model: Option<String>,
     #[doc = "The list of replication providers."]
-    #[serde(rename = "replicationProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replicationProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replication_providers: Vec<String>,
     #[doc = "The list of allowed operations."]
-    #[serde(rename = "allowedOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_operations: Vec<String>,
     #[doc = "The start time of the last planned failover."]
     #[serde(rename = "lastPlannedFailoverTime", default, with = "azure_core::date::rfc3339::option")]
@@ -13910,10 +14615,19 @@ pub struct RecoveryPlanProperties {
     #[serde(rename = "currentScenarioStatusDescription", default, skip_serializing_if = "Option::is_none")]
     pub current_scenario_status_description: Option<String>,
     #[doc = "The recovery plan groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<RecoveryPlanGroup>,
     #[doc = "The provider id and provider specific details."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificDetails>,
 }
 impl RecoveryPlanProperties {
@@ -14100,7 +14814,12 @@ pub struct RecoveryPlanTestFailoverInputProperties {
     #[serde(rename = "networkId", default, skip_serializing_if = "Option::is_none")]
     pub network_id: Option<String>,
     #[doc = "The provider specific properties."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificFailoverInput>,
 }
 impl RecoveryPlanTestFailoverInputProperties {
@@ -14174,7 +14893,12 @@ pub struct RecoveryPlanUnplannedFailoverInputProperties {
     #[serde(rename = "sourceSiteOperations")]
     pub source_site_operations: recovery_plan_unplanned_failover_input_properties::SourceSiteOperations,
     #[doc = "The provider specific properties."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificFailoverInput>,
 }
 impl RecoveryPlanUnplannedFailoverInputProperties {
@@ -14284,7 +15008,11 @@ impl RecoveryPoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoveryPointCollection {
     #[doc = "The recovery point details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryPoint>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14361,7 +15089,11 @@ impl RecoveryServicesProvider {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoveryServicesProviderCollection {
     #[doc = "The Servers details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryServicesProvider>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14412,10 +15144,20 @@ pub struct RecoveryServicesProviderProperties {
     #[serde(rename = "protectedItemCount", default, skip_serializing_if = "Option::is_none")]
     pub protected_item_count: Option<i32>,
     #[doc = "The scenarios allowed on this provider."]
-    #[serde(rename = "allowedScenarios", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedScenarios",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_scenarios: Vec<String>,
     #[doc = "The recovery services provider health error details."]
-    #[serde(rename = "healthErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_error_details: Vec<HealthError>,
     #[doc = "The DRA Id."]
     #[serde(rename = "draIdentifier", default, skip_serializing_if = "Option::is_none")]
@@ -14575,7 +15317,12 @@ pub struct ReplicationAgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<replication_agent_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl ReplicationAgentDetails {
@@ -14676,7 +15423,11 @@ impl ReplicationEligibilityResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationEligibilityResultsCollection {
     #[doc = "The replication eligibility results details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationEligibilityResults>,
 }
 impl ReplicationEligibilityResultsCollection {
@@ -14715,7 +15466,11 @@ pub struct ReplicationEligibilityResultsProperties {
     #[serde(rename = "clientRequestId", default, skip_serializing_if = "Option::is_none")]
     pub client_request_id: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ReplicationEligibilityResultsErrorInfo>,
 }
 impl ReplicationEligibilityResultsProperties {
@@ -14752,7 +15507,11 @@ impl ReplicationProtectedItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationProtectedItemCollection {
     #[doc = "The Replication protected item details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationProtectedItem>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14832,7 +15591,12 @@ pub struct ReplicationProtectedItemProperties {
     #[serde(rename = "switchProviderStateDescription", default, skip_serializing_if = "Option::is_none")]
     pub switch_provider_state_description: Option<String>,
     #[doc = "The allowed operations on the Replication protected item."]
-    #[serde(rename = "allowedOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_operations: Vec<String>,
     #[doc = "The consolidated protection health for the VM taking any issues with SRS as well as all the replication units associated with the VM's replication group into account. This is a string representation of the ProtectionHealth enumeration."]
     #[serde(rename = "replicationHealth", default, skip_serializing_if = "Option::is_none")]
@@ -14841,7 +15605,12 @@ pub struct ReplicationProtectedItemProperties {
     #[serde(rename = "failoverHealth", default, skip_serializing_if = "Option::is_none")]
     pub failover_health: Option<String>,
     #[doc = "List of health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The ID of Policy governing this PE."]
     #[serde(rename = "policyId", default, skip_serializing_if = "Option::is_none")]
@@ -14894,7 +15663,11 @@ impl ReplicationProtectionIntent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationProtectionIntentCollection {
     #[doc = "The Replication protection intent details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationProtectionIntent>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15038,13 +15811,23 @@ pub struct ReprotectAgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<reprotect_agent_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The protected item count."]
     #[serde(rename = "protectedItemCount", default, skip_serializing_if = "Option::is_none")]
     pub protected_item_count: Option<i32>,
     #[doc = "The list of accessible datastores fetched from discovery."]
-    #[serde(rename = "accessibleDatastores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessibleDatastores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accessible_datastores: Vec<String>,
     #[doc = "The Vcenter Id."]
     #[serde(rename = "vcenterId", default, skip_serializing_if = "Option::is_none")]
@@ -15130,7 +15913,12 @@ impl ResolveHealthInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResolveHealthInputProperties {
     #[doc = "Health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<ResolveHealthError>,
 }
 impl ResolveHealthInputProperties {
@@ -15166,7 +15954,11 @@ pub struct ResourceHealthSummary {
     #[serde(rename = "resourceCount", default, skip_serializing_if = "Option::is_none")]
     pub resource_count: Option<i32>,
     #[doc = "The list of summary of health errors across the resources under the container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issues: Vec<HealthErrorSummary>,
     #[doc = "The categorized resource counts."]
     #[serde(rename = "categorizedResourceCounts", default, skip_serializing_if = "Option::is_none")]
@@ -15418,7 +16210,11 @@ impl StorageClassification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageClassificationCollection {
     #[doc = "The storage details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageClassification>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15453,7 +16249,11 @@ impl StorageClassificationMapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageClassificationMappingCollection {
     #[doc = "The storage details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageClassificationMapping>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15528,7 +16328,12 @@ pub struct Subnet {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "The list of addresses for the subnet."]
-    #[serde(rename = "addressList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_list: Vec<String>,
 }
 impl Subnet {
@@ -15546,7 +16351,12 @@ pub struct SupportedOsDetails {
     #[serde(rename = "osType", default, skip_serializing_if = "Option::is_none")]
     pub os_type: Option<String>,
     #[doc = "The list of version for operating system."]
-    #[serde(rename = "osVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "osVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub os_versions: Vec<OsVersionWrapper>,
 }
 impl SupportedOsDetails {
@@ -15558,7 +16368,12 @@ impl SupportedOsDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedOsProperties {
     #[doc = "The supported operating systems property list."]
-    #[serde(rename = "supportedOsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_os_list: Vec<SupportedOsProperty>,
 }
 impl SupportedOsProperties {
@@ -15573,7 +16388,12 @@ pub struct SupportedOsProperty {
     #[serde(rename = "instanceType", default, skip_serializing_if = "Option::is_none")]
     pub instance_type: Option<String>,
     #[doc = "The list of supported operating systems."]
-    #[serde(rename = "supportedOs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_os: Vec<SupportedOsDetails>,
 }
 impl SupportedOsProperty {
@@ -15715,7 +16535,11 @@ impl TargetComputeSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TargetComputeSizeCollection {
     #[doc = "The list of target compute sizes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TargetComputeSize>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15757,13 +16581,22 @@ pub struct TargetComputeSizeProperties {
     #[serde(rename = "maxNicsCount", default, skip_serializing_if = "Option::is_none")]
     pub max_nics_count: Option<i32>,
     #[doc = "The reasons why the target compute size is not applicable for the protected item."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ComputeSizeErrorDetails>,
     #[doc = "The value indicating whether the target compute size supports high Iops."]
     #[serde(rename = "highIopsSupported", default, skip_serializing_if = "Option::is_none")]
     pub high_iops_supported: Option<String>,
     #[doc = "The supported HyperV Generations."]
-    #[serde(rename = "hyperVGenerations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hyperVGenerations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hyper_v_generations: Vec<String>,
 }
 impl TargetComputeSizeProperties {
@@ -15859,7 +16692,12 @@ pub struct TestFailoverJobDetails {
     #[serde(rename = "networkType", default, skip_serializing_if = "Option::is_none")]
     pub network_type: Option<String>,
     #[doc = "The test VM details."]
-    #[serde(rename = "protectedItemDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedItemDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_item_details: Vec<FailoverReplicationProtectedItemDetails>,
 }
 impl TestFailoverJobDetails {
@@ -16202,7 +17040,11 @@ impl UpdateRecoveryPlanInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UpdateRecoveryPlanInputProperties {
     #[doc = "The recovery plan groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<RecoveryPlanGroup>,
 }
 impl UpdateRecoveryPlanInputProperties {
@@ -16244,7 +17086,12 @@ pub struct UpdateReplicationProtectedItemInputProperties {
     #[serde(rename = "enableRdpOnTargetOption", default, skip_serializing_if = "Option::is_none")]
     pub enable_rdp_on_target_option: Option<String>,
     #[doc = "The list of VM nic details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicInputDetails>,
     #[doc = "License type."]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -16369,7 +17216,11 @@ impl VCenter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VCenterCollection {
     #[doc = "The vCenter details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VCenter>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16420,7 +17271,12 @@ pub struct VCenterProperties {
     #[serde(rename = "fabricArmResourceName", default, skip_serializing_if = "Option::is_none")]
     pub fabric_arm_resource_name: Option<String>,
     #[doc = "The health errors for this VCenter."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl VCenterProperties {
@@ -16447,7 +17303,12 @@ pub struct VmNicDetails {
     #[serde(rename = "recoveryVMNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_vm_network_id: Option<String>,
     #[doc = "The IP configurations of the NIC."]
-    #[serde(rename = "ipConfigs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configs: Vec<IpConfigDetails>,
     #[doc = "Selection type for failover."]
     #[serde(rename = "selectionType", default, skip_serializing_if = "Option::is_none")]
@@ -16501,7 +17362,12 @@ pub struct VmNicInputDetails {
     #[serde(rename = "nicId", default, skip_serializing_if = "Option::is_none")]
     pub nic_id: Option<String>,
     #[doc = "The IP configurations to be used by NIC during test failover and failover."]
-    #[serde(rename = "ipConfigs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configs: Vec<IpConfigInputDetails>,
     #[doc = "Selection type for failover."]
     #[serde(rename = "selectionType", default, skip_serializing_if = "Option::is_none")]
@@ -16963,13 +17829,23 @@ pub struct VMwareCbtMigrationDetails {
     #[serde(rename = "targetVmTags", default, skip_serializing_if = "Option::is_none")]
     pub target_vm_tags: Option<serde_json::Value>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<VMwareCbtProtectedDiskDetails>,
     #[doc = "The target network Id."]
     #[serde(rename = "targetNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub target_network_id: Option<String>,
     #[doc = "The network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VMwareCbtNicDetails>,
     #[doc = "The tags for the target NICs."]
     #[serde(rename = "targetNicTags", default, skip_serializing_if = "Option::is_none")]
@@ -17487,7 +18363,12 @@ pub struct VMwareCbtTestMigrateInput {
     #[serde(rename = "networkId")]
     pub network_id: String,
     #[doc = "The list of NIC details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VMwareCbtNicInput>,
 }
 impl VMwareCbtTestMigrateInput {
@@ -17559,10 +18440,20 @@ pub struct VMwareCbtUpdateMigrationItemInput {
     #[serde(rename = "testNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub test_network_id: Option<String>,
     #[doc = "The list of NIC details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VMwareCbtNicInput>,
     #[doc = "The list of disk update properties."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<VMwareCbtUpdateDiskInput>,
     #[doc = "The license type."]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -17698,13 +18589,28 @@ pub struct VMwareDetails {
     #[serde(flatten)]
     pub fabric_specific_details: FabricSpecificDetails,
     #[doc = "The list of Process Servers associated with the fabric."]
-    #[serde(rename = "processServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "processServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub process_servers: Vec<ProcessServer>,
     #[doc = "The list of Master Target servers associated with the fabric."]
-    #[serde(rename = "masterTargetServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "masterTargetServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub master_target_servers: Vec<MasterTargetServer>,
     #[doc = "The list of run as accounts created on the server."]
-    #[serde(rename = "runAsAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "runAsAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub run_as_accounts: Vec<RunAsAccount>,
     #[doc = "The number of replication pairs configured in this CS."]
     #[serde(rename = "replicationPairCount", default, skip_serializing_if = "Option::is_none")]
@@ -17794,7 +18700,12 @@ pub struct VMwareDetails {
     #[serde(rename = "agentVersionDetails", default, skip_serializing_if = "Option::is_none")]
     pub agent_version_details: Option<VersionDetails>,
     #[doc = "The switch provider blocking error information."]
-    #[serde(rename = "switchProviderBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "switchProviderBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub switch_provider_blocking_error_details: Vec<InMageFabricSwitchProviderBlockingErrorDetails>,
 }
 impl VMwareDetails {
@@ -17886,7 +18797,12 @@ pub struct VMwareV2FabricSpecificDetails {
     #[serde(rename = "serviceContainerId", default, skip_serializing_if = "Option::is_none")]
     pub service_container_id: Option<String>,
     #[doc = "The list of process servers."]
-    #[serde(rename = "processServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "processServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub process_servers: Vec<ProcessServerDetails>,
 }
 impl VMwareV2FabricSpecificDetails {
@@ -17933,10 +18849,20 @@ pub struct VMwareVirtualMachineDetails {
     #[serde(rename = "discoveryType", default, skip_serializing_if = "Option::is_none")]
     pub discovery_type: Option<String>,
     #[doc = "The disk details."]
-    #[serde(rename = "diskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_details: Vec<InMageDiskDetails>,
     #[doc = "The validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
 }
 impl VMwareVirtualMachineDetails {
@@ -17974,7 +18900,12 @@ impl VaultHealthDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultHealthProperties {
     #[doc = "The list of errors on the vault."]
-    #[serde(rename = "vaultErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_errors: Vec<HealthError>,
     #[doc = "Base class to define the health summary of the resources contained under an Arm resource."]
     #[serde(rename = "protectedItemsHealth", default, skip_serializing_if = "Option::is_none")]
@@ -18009,7 +18940,11 @@ impl VaultSetting {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultSettingCollection {
     #[doc = "The list of vault setting."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VaultSetting>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/recoveryservicessiterecovery/src/package_2022_04/models.rs b/services/mgmt/recoveryservicessiterecovery/src/package_2022_04/models.rs
index b3a7be1751..948a13dd40 100644
--- a/services/mgmt/recoveryservicessiterecovery/src/package_2022_04/models.rs
+++ b/services/mgmt/recoveryservicessiterecovery/src/package_2022_04/models.rs
@@ -9,10 +9,20 @@ pub struct A2aAddDisksInput {
     #[serde(flatten)]
     pub add_disks_provider_specific_input: AddDisksProviderSpecificInput,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aVmManagedDiskInputDetails>,
 }
 impl A2aAddDisksInput {
@@ -209,10 +219,20 @@ pub struct A2aCreateProtectionIntentInput {
     #[serde(rename = "autoProtectionOfDataDisk", default, skip_serializing_if = "Option::is_none")]
     pub auto_protection_of_data_disk: Option<a2a_create_protection_intent_input::AutoProtectionOfDataDisk>,
     #[doc = "The list of vm disk inputs."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aProtectionIntentDiskInputDetails>,
     #[doc = "The list of vm managed disk inputs."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aProtectionIntentManagedDiskInputDetails>,
     #[doc = "The multi vm group name."]
     #[serde(rename = "multiVmGroupName", default, skip_serializing_if = "Option::is_none")]
@@ -557,10 +577,20 @@ pub struct A2aEnableProtectionInput {
     #[serde(rename = "recoveryProximityPlacementGroupId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_proximity_placement_group_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aVmManagedDiskInputDetails>,
     #[doc = "The multi vm group name."]
     #[serde(rename = "multiVmGroupName", default, skip_serializing_if = "Option::is_none")]
@@ -810,7 +840,12 @@ pub struct A2aProtectedDiskDetails {
     #[serde(rename = "diskState", default, skip_serializing_if = "Option::is_none")]
     pub disk_state: Option<String>,
     #[doc = "The disk level operations list."]
-    #[serde(rename = "allowedDiskLevelOperation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedDiskLevelOperation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_disk_level_operation: Vec<String>,
     #[doc = "A value indicating whether vm has encrypted os disk or not."]
     #[serde(rename = "isDiskEncrypted", default, skip_serializing_if = "Option::is_none")]
@@ -907,7 +942,12 @@ pub struct A2aProtectedManagedDiskDetails {
     #[serde(rename = "diskState", default, skip_serializing_if = "Option::is_none")]
     pub disk_state: Option<String>,
     #[doc = "The disk level operations list."]
-    #[serde(rename = "allowedDiskLevelOperation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedDiskLevelOperation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_disk_level_operation: Vec<String>,
     #[doc = "A value indicating whether vm has encrypted os disk or not."]
     #[serde(rename = "isDiskEncrypted", default, skip_serializing_if = "Option::is_none")]
@@ -1137,7 +1177,11 @@ pub struct A2aRecoveryPointDetails {
     #[serde(rename = "recoveryPointSyncType", default, skip_serializing_if = "Option::is_none")]
     pub recovery_point_sync_type: Option<a2a_recovery_point_details::RecoveryPointSyncType>,
     #[doc = "List of disk ids representing a recovery point."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<String>,
 }
 impl A2aRecoveryPointDetails {
@@ -1197,10 +1241,20 @@ pub struct A2aRemoveDisksInput {
     #[serde(flatten)]
     pub remove_disks_provider_specific_input: RemoveDisksProviderSpecificInput,
     #[doc = "The list of vm disk vhd URIs."]
-    #[serde(rename = "vmDisksUris", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisksUris",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks_uris: Vec<String>,
     #[doc = "The list of vm managed disk Ids."]
-    #[serde(rename = "vmManagedDisksIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisksIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks_ids: Vec<String>,
 }
 impl A2aRemoveDisksInput {
@@ -1251,13 +1305,28 @@ pub struct A2aReplicationDetails {
     #[serde(rename = "managementId", default, skip_serializing_if = "Option::is_none")]
     pub management_id: Option<String>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<A2aProtectedDiskDetails>,
     #[doc = "The list of unprotected disks."]
-    #[serde(rename = "unprotectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "unprotectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unprotected_disks: Vec<A2aUnprotectedDiskDetails>,
     #[doc = "The list of protected managed disks."]
-    #[serde(rename = "protectedManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_managed_disks: Vec<A2aProtectedManagedDiskDetails>,
     #[doc = "The recovery boot diagnostic storage account Arm Id."]
     #[serde(rename = "recoveryBootDiagStorageAccountId", default, skip_serializing_if = "Option::is_none")]
@@ -1293,7 +1362,12 @@ pub struct A2aReplicationDetails {
     #[serde(rename = "selectedTfoAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub selected_tfo_azure_network_id: Option<String>,
     #[doc = "The virtual machine nic details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "Azure to Azure VM synced configuration details."]
     #[serde(rename = "vmSyncedConfigDetails", default, skip_serializing_if = "Option::is_none")]
@@ -1575,10 +1649,20 @@ pub struct A2aReplicationIntentDetails {
     #[serde(rename = "recoverySubscriptionId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_subscription_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aProtectionIntentDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aProtectionIntentManagedDiskInputDetails>,
     #[doc = "The recovery resource group id."]
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -1791,7 +1875,12 @@ pub struct A2aReprotectInput {
     #[serde(rename = "recoveryContainerId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_container_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The recovery resource group Id. Valid for V2 scenarios."]
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -1828,10 +1917,20 @@ pub struct A2aSwitchProtectionInput {
     #[serde(rename = "recoveryContainerId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_container_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aVmManagedDiskInputDetails>,
     #[doc = "The recovery resource group Id. Valid for V2 scenarios."]
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -2104,7 +2203,12 @@ pub struct A2aUpdateReplicationProtectedItemInput {
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_resource_group_id: Option<String>,
     #[doc = "Managed disk update details."]
-    #[serde(rename = "managedDiskUpdateDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedDiskUpdateDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_disk_update_details: Vec<A2aVmManagedDiskUpdateDetails>,
     #[doc = "The boot diagnostic storage account."]
     #[serde(rename = "recoveryBootDiagStorageAccountId", default, skip_serializing_if = "Option::is_none")]
@@ -2259,7 +2363,12 @@ pub struct AsrTask {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The state/actions applicable on this task."]
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
     #[doc = "The name."]
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
@@ -2280,7 +2389,11 @@ pub struct AsrTask {
     #[serde(rename = "groupTaskCustomDetails", default, skip_serializing_if = "Option::is_none")]
     pub group_task_custom_details: Option<GroupTaskDetails>,
     #[doc = "The task error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<JobErrorDetails>,
 }
 impl AsrTask {
@@ -2425,7 +2538,11 @@ pub struct AgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub fqdn: Option<String>,
     #[doc = "The disks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<AgentDiskDetails>,
 }
 impl AgentDetails {
@@ -2475,7 +2592,11 @@ impl Alert {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertCollection {
     #[doc = "The list of alerts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2499,7 +2620,12 @@ pub struct AlertProperties {
     #[serde(rename = "sendToOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_to_owners: Option<String>,
     #[doc = "The custom email address for sending emails."]
-    #[serde(rename = "customEmailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customEmailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_email_addresses: Vec<String>,
     #[doc = "The locale for the email notification."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2514,7 +2640,11 @@ impl AlertProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplianceCollection {
     #[doc = "The appliance details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationAppliance>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2682,10 +2812,19 @@ pub struct AzureFabricSpecificDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "The container Ids for the Azure fabric."]
-    #[serde(rename = "containerIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_ids: Vec<String>,
     #[doc = "The zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<A2aZoneDetails>,
 }
 impl AzureFabricSpecificDetails {
@@ -2760,7 +2899,12 @@ pub struct AzureToAzureVmSyncedConfigDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<serde_json::Value>,
     #[doc = "The Azure VM input endpoints."]
-    #[serde(rename = "inputEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_endpoints: Vec<InputEndpoint>,
 }
 impl AzureToAzureVmSyncedConfigDetails {
@@ -2853,7 +2997,12 @@ pub struct ConfigureAlertRequestProperties {
     #[serde(rename = "sendToOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_to_owners: Option<String>,
     #[doc = "The custom email address for sending emails."]
-    #[serde(rename = "customEmailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customEmailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_email_addresses: Vec<String>,
     #[doc = "The locale for the email notification."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2870,7 +3019,12 @@ pub struct ConsistencyCheckTaskDetails {
     #[serde(flatten)]
     pub task_type_details: TaskTypeDetails,
     #[doc = "The list of inconsistent Vm details."]
-    #[serde(rename = "vmDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_details: Vec<InconsistentVmDetails>,
 }
 impl ConsistencyCheckTaskDetails {
@@ -2954,7 +3108,12 @@ impl CreateProtectionContainerInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CreateProtectionContainerInputProperties {
     #[doc = "Provider specific inputs for container creation."]
-    #[serde(rename = "providerSpecificInput", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificInput",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_input: Vec<ReplicationProviderSpecificContainerCreationInput>,
 }
 impl CreateProtectionContainerInputProperties {
@@ -3054,7 +3213,12 @@ pub struct CreateRecoveryPlanInputProperties {
     #[doc = "The recovery plan groups."]
     pub groups: Vec<RecoveryPlanGroup>,
     #[doc = "The provider specific input."]
-    #[serde(rename = "providerSpecificInput", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificInput",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_input: Vec<RecoveryPlanProviderSpecificInput>,
 }
 impl CreateRecoveryPlanInputProperties {
@@ -3387,7 +3551,12 @@ pub struct DraDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<dra_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The count of protected items which are protected in forward direction."]
     #[serde(rename = "forwardProtectedItemCount", default, skip_serializing_if = "Option::is_none")]
@@ -3564,7 +3733,11 @@ impl Event {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventCollection {
     #[doc = "The list of events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Event>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3615,7 +3788,12 @@ pub struct EventProperties {
     #[serde(rename = "eventSpecificDetails", default, skip_serializing_if = "Option::is_none")]
     pub event_specific_details: Option<EventSpecificDetails>,
     #[doc = "The list of errors / warnings capturing details associated with the issue(s)."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl EventProperties {
@@ -3877,7 +4055,11 @@ impl Fabric {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FabricCollection {
     #[doc = "The fabric details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Fabric>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3940,7 +4122,12 @@ pub struct FabricProperties {
     #[serde(rename = "customDetails", default, skip_serializing_if = "Option::is_none")]
     pub custom_details: Option<FabricSpecificDetails>,
     #[doc = "Fabric health error details."]
-    #[serde(rename = "healthErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_error_details: Vec<HealthError>,
     #[doc = "Health of fabric."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4053,7 +4240,12 @@ pub struct FailoverJobDetails {
     #[serde(flatten)]
     pub job_details: JobDetails,
     #[doc = "The test VM details."]
-    #[serde(rename = "protectedItemDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedItemDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_item_details: Vec<FailoverReplicationProtectedItemDetails>,
 }
 impl FailoverJobDetails {
@@ -4089,7 +4281,12 @@ pub struct FailoverProcessServerRequestProperties {
     #[serde(rename = "targetProcessServerId", default, skip_serializing_if = "Option::is_none")]
     pub target_process_server_id: Option<String>,
     #[doc = "The VMS to migrate."]
-    #[serde(rename = "vmsToMigrate", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmsToMigrate",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vms_to_migrate: Vec<String>,
     #[doc = "A value for failover type. It can be systemlevel/serverlevel."]
     #[serde(rename = "updateType", default, skip_serializing_if = "Option::is_none")]
@@ -4143,7 +4340,12 @@ pub struct GroupTaskDetails {
     #[serde(rename = "instanceType")]
     pub instance_type: String,
     #[doc = "The child tasks."]
-    #[serde(rename = "childTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_tasks: Vec<AsrTask>,
 }
 impl GroupTaskDetails {
@@ -4158,7 +4360,12 @@ impl GroupTaskDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthError {
     #[doc = "The inner health errors. HealthError having a list of HealthError as child errors is problematic. InnerHealthError is used because this will prevent an infinite loop of structures when Hydra tries to auto-generate the contract. We are exposing the related health errors as inner health errors and all API consumers can utilize this in the same fashion as Exception -&gt; InnerException."]
-    #[serde(rename = "innerHealthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "innerHealthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inner_health_errors: Vec<InnerHealthError>,
     #[doc = "Source of error."]
     #[serde(rename = "errorSource", default, skip_serializing_if = "Option::is_none")]
@@ -4270,7 +4477,12 @@ pub struct HealthErrorSummary {
     #[serde(rename = "affectedResourceSubtype", default, skip_serializing_if = "Option::is_none")]
     pub affected_resource_subtype: Option<String>,
     #[doc = "The list of affected resource correlation Ids. This can be used to uniquely identify the count of items affected by a specific category and severity as well as count of item affected by an specific issue."]
-    #[serde(rename = "affectedResourceCorrelationIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "affectedResourceCorrelationIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub affected_resource_correlation_ids: Vec<String>,
 }
 impl HealthErrorSummary {
@@ -4583,7 +4795,12 @@ pub struct HyperVReplicaAzureEnableProtectionInput {
     #[serde(rename = "logStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub log_storage_account_id: Option<String>,
     #[doc = "The list of VHD Ids of disks to be protected."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
     #[doc = "The Id of the target resource group (for classic deployment) in which the failover VM is to be created."]
     #[serde(rename = "targetAzureV1ResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -4619,7 +4836,12 @@ pub struct HyperVReplicaAzureEnableProtectionInput {
     #[serde(rename = "diskType", default, skip_serializing_if = "Option::is_none")]
     pub disk_type: Option<hyper_v_replica_azure_enable_protection_input::DiskType>,
     #[doc = "The disks to include list for managed disks."]
-    #[serde(rename = "disksToIncludeForManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToIncludeForManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include_for_managed_disks: Vec<HyperVReplicaAzureDiskInputDetails>,
     #[doc = "The DiskEncryptionSet ARM Id."]
     #[serde(rename = "diskEncryptionSetId", default, skip_serializing_if = "Option::is_none")]
@@ -4958,7 +5180,12 @@ pub struct HyperVReplicaAzurePolicyInput {
     #[serde(rename = "onlineReplicationStartTime", default, skip_serializing_if = "Option::is_none")]
     pub online_replication_start_time: Option<String>,
     #[doc = "The list of storage accounts to which the VMs in the primary cloud can replicate to."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<String>,
 }
 impl HyperVReplicaAzurePolicyInput {
@@ -4979,7 +5206,12 @@ pub struct HyperVReplicaAzureReplicationDetails {
     #[serde(flatten)]
     pub replication_provider_specific_settings: ReplicationProviderSpecificSettings,
     #[doc = "Azure VM Disk details."]
-    #[serde(rename = "azureVmDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureVmDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_vm_disk_details: Vec<AzureVmDiskDetails>,
     #[doc = "Recovery Azure given name."]
     #[serde(rename = "recoveryAzureVmName", default, skip_serializing_if = "Option::is_none")]
@@ -5015,7 +5247,12 @@ pub struct HyperVReplicaAzureReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The selected recovery azure network Id."]
     #[serde(rename = "selectedRecoveryAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -5075,7 +5312,12 @@ pub struct HyperVReplicaAzureReplicationDetails {
     #[serde(rename = "targetNicTags", default, skip_serializing_if = "Option::is_none")]
     pub target_nic_tags: Option<serde_json::Value>,
     #[doc = "The list of protected managed disks."]
-    #[serde(rename = "protectedManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_managed_disks: Vec<HyperVReplicaAzureManagedDiskDetails>,
 }
 impl HyperVReplicaAzureReplicationDetails {
@@ -5241,7 +5483,12 @@ pub struct HyperVReplicaAzureUpdateReplicationProtectedItemInput {
     #[serde(rename = "sqlServerLicenseType", default, skip_serializing_if = "Option::is_none")]
     pub sql_server_license_type: Option<hyper_v_replica_azure_update_replication_protected_item_input::SqlServerLicenseType>,
     #[doc = "The list of disk update properties."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<UpdateDiskInput>,
 }
 impl HyperVReplicaAzureUpdateReplicationProtectedItemInput {
@@ -5403,7 +5650,12 @@ pub struct HyperVReplicaBaseReplicationDetails {
     #[serde(rename = "lastReplicatedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_replicated_time: Option<time::OffsetDateTime>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The virtual machine Id."]
     #[serde(rename = "vmId", default, skip_serializing_if = "Option::is_none")]
@@ -5418,7 +5670,12 @@ pub struct HyperVReplicaBaseReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "VM disk details."]
-    #[serde(rename = "vMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_m_disk_details: Vec<DiskDetails>,
 }
 impl HyperVReplicaBaseReplicationDetails {
@@ -5522,7 +5779,12 @@ pub struct HyperVReplicaBlueReplicationDetails {
     #[serde(rename = "lastReplicatedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_replicated_time: Option<time::OffsetDateTime>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The virtual machine Id."]
     #[serde(rename = "vmId", default, skip_serializing_if = "Option::is_none")]
@@ -5537,7 +5799,12 @@ pub struct HyperVReplicaBlueReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "VM disk details."]
-    #[serde(rename = "vMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_m_disk_details: Vec<DiskDetails>,
 }
 impl HyperVReplicaBlueReplicationDetails {
@@ -5677,7 +5944,12 @@ pub struct HyperVReplicaReplicationDetails {
     #[serde(rename = "lastReplicatedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_replicated_time: Option<time::OffsetDateTime>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The virtual machine Id."]
     #[serde(rename = "vmId", default, skip_serializing_if = "Option::is_none")]
@@ -5692,7 +5964,12 @@ pub struct HyperVReplicaReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "VM disk details."]
-    #[serde(rename = "vMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_m_disk_details: Vec<DiskDetails>,
 }
 impl HyperVReplicaReplicationDetails {
@@ -5715,7 +5992,12 @@ pub struct HyperVSiteDetails {
     #[serde(flatten)]
     pub fabric_specific_details: FabricSpecificDetails,
     #[doc = "The list of Hyper-V hosts associated with the fabric."]
-    #[serde(rename = "hyperVHosts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hyperVHosts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hyper_v_hosts: Vec<HyperVHostDetails>,
 }
 impl HyperVSiteDetails {
@@ -5741,7 +6023,12 @@ pub struct HyperVVirtualMachineDetails {
     #[serde(rename = "osDetails", default, skip_serializing_if = "Option::is_none")]
     pub os_details: Option<OsDetails>,
     #[doc = "The Last successful failover time."]
-    #[serde(rename = "diskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_details: Vec<DiskDetails>,
     #[doc = "A value indicating whether the VM has a physical disk attached. String value of SrsDataContract.PresenceStatus enum."]
     #[serde(rename = "hasPhysicalDisk", default, skip_serializing_if = "Option::is_none")]
@@ -5913,7 +6200,12 @@ pub struct IpConfigDetails {
     pub recovery_ip_address_type: Option<String>,
     #[serde(rename = "recoveryPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_public_ip_address_id: Option<String>,
-    #[serde(rename = "recoveryLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_lb_backend_address_pool_ids: Vec<String>,
     #[serde(rename = "tfoSubnetName", default, skip_serializing_if = "Option::is_none")]
     pub tfo_subnet_name: Option<String>,
@@ -5921,7 +6213,12 @@ pub struct IpConfigDetails {
     pub tfo_static_ip_address: Option<String>,
     #[serde(rename = "tfoPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub tfo_public_ip_address_id: Option<String>,
-    #[serde(rename = "tfoLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tfoLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tfo_lb_backend_address_pool_ids: Vec<String>,
 }
 impl IpConfigDetails {
@@ -5943,7 +6240,12 @@ pub struct IpConfigInputDetails {
     pub recovery_static_ip_address: Option<String>,
     #[serde(rename = "recoveryPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_public_ip_address_id: Option<String>,
-    #[serde(rename = "recoveryLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_lb_backend_address_pool_ids: Vec<String>,
     #[serde(rename = "tfoSubnetName", default, skip_serializing_if = "Option::is_none")]
     pub tfo_subnet_name: Option<String>,
@@ -5951,7 +6253,12 @@ pub struct IpConfigInputDetails {
     pub tfo_static_ip_address: Option<String>,
     #[serde(rename = "tfoPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub tfo_public_ip_address_id: Option<String>,
-    #[serde(rename = "tfoLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tfoLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tfo_lb_backend_address_pool_ids: Vec<String>,
 }
 impl IpConfigInputDetails {
@@ -6136,7 +6443,12 @@ pub struct InMageAzureV2EnableProtectionInput {
     #[serde(rename = "multiVmGroupName", default, skip_serializing_if = "Option::is_none")]
     pub multi_vm_group_name: Option<String>,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<InMageAzureV2DiskInputDetails>,
     #[doc = "The selected target Azure network Id."]
     #[serde(rename = "targetAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -6694,7 +7006,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "multiVmSyncStatus", default, skip_serializing_if = "Option::is_none")]
     pub multi_vm_sync_status: Option<String>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageAzureV2ProtectedDiskDetails>,
     #[doc = "A value indicating whether any disk is resized for this VM."]
     #[serde(rename = "diskResized", default, skip_serializing_if = "Option::is_none")]
@@ -6718,7 +7035,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "osDiskId", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_id: Option<String>,
     #[doc = "Azure VM Disk details."]
-    #[serde(rename = "azureVMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureVMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_vm_disk_details: Vec<AzureVmDiskDetails>,
     #[doc = "Recovery Azure given name."]
     #[serde(rename = "recoveryAzureVMName", default, skip_serializing_if = "Option::is_none")]
@@ -6733,7 +7055,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "recoveryAzureLogStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_azure_log_storage_account_id: Option<String>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The selected recovery azure network Id."]
     #[serde(rename = "selectedRecoveryAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -6751,7 +7078,11 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "enableRdpOnTargetOption", default, skip_serializing_if = "Option::is_none")]
     pub enable_rdp_on_target_option: Option<String>,
     #[doc = "The datastores of the on-premise machine. Value can be list of strings that contain datastore names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The ARM Id of the target Azure VM. This value will be null until the VM is failed over. Only after failure it will be populated with the ARM Id of the Azure VM."]
     #[serde(rename = "targetVmId", default, skip_serializing_if = "Option::is_none")]
@@ -6778,7 +7109,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "sqlServerLicenseType", default, skip_serializing_if = "Option::is_none")]
     pub sql_server_license_type: Option<String>,
     #[doc = "The validation errors of the on-premise machine Value can be list of validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
     #[doc = "The last RPO calculated time."]
     #[serde(rename = "lastRpoCalculatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -6793,7 +7129,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "osVersion", default, skip_serializing_if = "Option::is_none")]
     pub os_version: Option<String>,
     #[doc = "The list of protected managed disks."]
-    #[serde(rename = "protectedManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_managed_disks: Vec<InMageAzureV2ManagedDiskDetails>,
     #[doc = "The last recovery point received time."]
     #[serde(rename = "lastRecoveryPointReceived", default, with = "azure_core::date::rfc3339::option")]
@@ -6826,7 +7167,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "targetNicTags", default, skip_serializing_if = "Option::is_none")]
     pub target_nic_tags: Option<serde_json::Value>,
     #[doc = "The switch provider blocking error information."]
-    #[serde(rename = "switchProviderBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "switchProviderBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub switch_provider_blocking_error_details: Vec<InMageAzureV2SwitchProviderBlockingErrorDetails>,
     #[doc = "InMageAzureV2 switch provider details."]
     #[serde(rename = "switchProviderDetails", default, skip_serializing_if = "Option::is_none")]
@@ -6930,7 +7276,12 @@ pub struct InMageAzureV2ReprotectInput {
     #[serde(rename = "logStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub log_storage_account_id: Option<String>,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
 }
 impl InMageAzureV2ReprotectInput {
@@ -7092,7 +7443,12 @@ pub struct InMageAzureV2UpdateReplicationProtectedItemInput {
     #[serde(rename = "sqlServerLicenseType", default, skip_serializing_if = "Option::is_none")]
     pub sql_server_license_type: Option<in_mage_azure_v2_update_replication_protected_item_input::SqlServerLicenseType>,
     #[doc = "The list of disk update properties."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<UpdateDiskInput>,
 }
 impl InMageAzureV2UpdateReplicationProtectedItemInput {
@@ -7223,7 +7579,12 @@ pub struct InMageDiskDetails {
     #[serde(rename = "diskConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub disk_configuration: Option<String>,
     #[doc = "Volumes of the disk."]
-    #[serde(rename = "volumeList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_list: Vec<DiskVolumeDetails>,
 }
 impl InMageDiskDetails {
@@ -7235,10 +7596,20 @@ impl InMageDiskDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InMageDiskExclusionInput {
     #[doc = "The volume label based option for disk exclusion."]
-    #[serde(rename = "volumeOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_options: Vec<InMageVolumeExclusionOptions>,
     #[doc = "The guest disk signature based option for disk exclusion."]
-    #[serde(rename = "diskSignatureOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskSignatureOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_signature_options: Vec<InMageDiskSignatureExclusionOptions>,
 }
 impl InMageDiskExclusionInput {
@@ -7291,7 +7662,12 @@ pub struct InMageEnableProtectionInput {
     #[serde(rename = "diskExclusionInput", default, skip_serializing_if = "Option::is_none")]
     pub disk_exclusion_input: Option<InMageDiskExclusionInput>,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
 }
 impl InMageEnableProtectionInput {
@@ -7582,7 +7958,12 @@ pub struct InMageRcmApplianceDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub dra: Option<DraDetails>,
     #[doc = "The switch provider blocking error information."]
-    #[serde(rename = "switchProviderBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "switchProviderBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub switch_provider_blocking_error_details: Vec<InMageRcmFabricSwitchProviderBlockingErrorDetails>,
 }
 impl InMageRcmApplianceDetails {
@@ -7596,7 +7977,11 @@ pub struct InMageRcmApplianceSpecificDetails {
     #[serde(flatten)]
     pub appliance_specific_details: ApplianceSpecificDetails,
     #[doc = "The list of appliances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub appliances: Vec<InMageRcmApplianceDetails>,
 }
 impl InMageRcmApplianceSpecificDetails {
@@ -7634,10 +8019,19 @@ pub struct InMageRcmDiscoveredProtectedVmDetails {
     #[serde(rename = "vCenterFqdn", default, skip_serializing_if = "Option::is_none")]
     pub v_center_fqdn: Option<String>,
     #[doc = "The list of datastores."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The list of IP addresses."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "The VMware tools status."]
     #[serde(rename = "vmwareToolsStatus", default, skip_serializing_if = "Option::is_none")]
@@ -7816,7 +8210,12 @@ pub struct InMageRcmEnableProtectionInput {
     #[serde(rename = "fabricDiscoveryMachineId")]
     pub fabric_discovery_machine_id: String,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<InMageRcmDiskInput>,
     #[doc = "InMageRcm disk input."]
     #[serde(rename = "disksDefault", default, skip_serializing_if = "Option::is_none")]
@@ -8044,28 +8443,67 @@ pub struct InMageRcmFabricSpecificDetails {
     #[serde(rename = "sourceAgentIdentityDetails", default, skip_serializing_if = "Option::is_none")]
     pub source_agent_identity_details: Option<IdentityProviderDetails>,
     #[doc = "The list of process servers."]
-    #[serde(rename = "processServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "processServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub process_servers: Vec<ProcessServerDetails>,
     #[doc = "The list of RCM proxies."]
-    #[serde(rename = "rcmProxies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rcmProxies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rcm_proxies: Vec<RcmProxyDetails>,
     #[doc = "The list of push installers."]
-    #[serde(rename = "pushInstallers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pushInstallers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub push_installers: Vec<PushInstallerDetails>,
     #[doc = "The list of replication agents."]
-    #[serde(rename = "replicationAgents", default, skip_serializing_if = "Vec::is_empty")]
-    pub replication_agents: Vec<ReplicationAgentDetails>,
+    #[serde(
+        rename = "replicationAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
+    pub replication_agents: Vec<ReplicationAgentDetails>,
     #[doc = "The list of reprotect agents."]
-    #[serde(rename = "reprotectAgents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reprotectAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reprotect_agents: Vec<ReprotectAgentDetails>,
     #[doc = "The list of Mars agents."]
-    #[serde(rename = "marsAgents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "marsAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mars_agents: Vec<MarsAgentDetails>,
     #[doc = "The list of DRAs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dras: Vec<DraDetails>,
     #[doc = "The list of agent details."]
-    #[serde(rename = "agentDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_details: Vec<AgentDetails>,
 }
 impl InMageRcmFabricSpecificDetails {
@@ -8128,10 +8566,19 @@ pub struct InMageRcmFailbackDiscoveredProtectedVmDetails {
     #[serde(rename = "vCenterFqdn", default, skip_serializing_if = "Option::is_none")]
     pub v_center_fqdn: Option<String>,
     #[doc = "The list of datastores."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The list of IP addresses."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "The VMware tools status."]
     #[serde(rename = "vmwareToolsStatus", default, skip_serializing_if = "Option::is_none")]
@@ -8221,7 +8668,12 @@ pub struct InMageRcmFailbackMobilityAgentDetails {
     #[serde(rename = "lastHeartbeatUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_heartbeat_utc: Option<time::OffsetDateTime>,
     #[doc = "The whether update is possible or not."]
-    #[serde(rename = "reasonsBlockingUpgrade", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reasonsBlockingUpgrade",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons_blocking_upgrade: Vec<String>,
     #[doc = "A value indicating whether agent is upgradeable or not."]
     #[serde(rename = "isUpgradeable", default, skip_serializing_if = "Option::is_none")]
@@ -8463,13 +8915,23 @@ pub struct InMageRcmFailbackReplicationDetails {
     #[serde(rename = "resyncState", default, skip_serializing_if = "Option::is_none")]
     pub resync_state: Option<in_mage_rcm_failback_replication_details::ResyncState>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageRcmFailbackProtectedDiskDetails>,
     #[doc = "InMageRcmFailback mobility agent details."]
     #[serde(rename = "mobilityAgentDetails", default, skip_serializing_if = "Option::is_none")]
     pub mobility_agent_details: Option<InMageRcmFailbackMobilityAgentDetails>,
     #[doc = "The network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<InMageRcmFailbackNicDetails>,
     #[doc = "The last planned failover start time."]
     #[serde(rename = "lastPlannedFailoverStartTime", default, with = "azure_core::date::rfc3339::option")]
@@ -8860,7 +9322,12 @@ pub struct InMageRcmMobilityAgentDetails {
     #[serde(rename = "lastHeartbeatUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_heartbeat_utc: Option<time::OffsetDateTime>,
     #[doc = "The whether update is possible or not."]
-    #[serde(rename = "reasonsBlockingUpgrade", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reasonsBlockingUpgrade",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons_blocking_upgrade: Vec<String>,
     #[doc = "A value indicating whether agent is upgradeable or not."]
     #[serde(rename = "isUpgradeable", default, skip_serializing_if = "Option::is_none")]
@@ -9394,7 +9861,12 @@ pub struct InMageRcmReplicationDetails {
     #[serde(rename = "agentUpgradeAttemptToVersion", default, skip_serializing_if = "Option::is_none")]
     pub agent_upgrade_attempt_to_version: Option<String>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageRcmProtectedDiskDetails>,
     #[doc = "A value indicating whether last agent upgrade was successful or not."]
     #[serde(rename = "isLastUpgradeSuccessful", default, skip_serializing_if = "Option::is_none")]
@@ -9410,13 +9882,28 @@ pub struct InMageRcmReplicationDetails {
     #[serde(rename = "mobilityAgentDetails", default, skip_serializing_if = "Option::is_none")]
     pub mobility_agent_details: Option<InMageRcmMobilityAgentDetails>,
     #[doc = "The last agent upgrade error information."]
-    #[serde(rename = "lastAgentUpgradeErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "lastAgentUpgradeErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub last_agent_upgrade_error_details: Vec<InMageRcmLastAgentUpgradeErrorDetails>,
     #[doc = "The agent upgrade blocking error information."]
-    #[serde(rename = "agentUpgradeBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentUpgradeBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_upgrade_blocking_error_details: Vec<InMageRcmAgentUpgradeBlockingErrorDetails>,
     #[doc = "The network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<InMageRcmNicDetails>,
     #[doc = "InMageRcm discovered protected VM details."]
     #[serde(rename = "discoveredVmDetails", default, skip_serializing_if = "Option::is_none")]
@@ -9875,7 +10362,12 @@ pub struct InMageRcmUpdateReplicationProtectedItemInput {
     #[serde(rename = "testNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub test_network_id: Option<String>,
     #[doc = "The list of NIC details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<InMageRcmNicInput>,
     #[doc = "The license type."]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -9989,7 +10481,12 @@ pub struct InMageReplicationDetails {
     #[serde(rename = "rpoInSeconds", default, skip_serializing_if = "Option::is_none")]
     pub rpo_in_seconds: Option<i64>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageProtectedDiskDetails>,
     #[doc = "The source IP address."]
     #[serde(rename = "ipAddress", default, skip_serializing_if = "Option::is_none")]
@@ -10031,7 +10528,12 @@ pub struct InMageReplicationDetails {
     #[serde(rename = "infrastructureVmId", default, skip_serializing_if = "Option::is_none")]
     pub infrastructure_vm_id: Option<String>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "A value indicating the discovery type of the machine."]
     #[serde(rename = "discoveryType", default, skip_serializing_if = "Option::is_none")]
@@ -10040,10 +10542,19 @@ pub struct InMageReplicationDetails {
     #[serde(rename = "azureStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub azure_storage_account_id: Option<String>,
     #[doc = "The datastores of the on-premise machine Value can be list of strings that contain datastore names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The validation errors of the on-premise machine Value can be list of validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
     #[doc = "The last RPO calculated time."]
     #[serde(rename = "lastRpoCalculatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -10141,7 +10652,12 @@ pub struct InMageReprotectInput {
     #[serde(rename = "profileId")]
     pub profile_id: String,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
 }
 impl InMageReprotectInput {
@@ -10316,10 +10832,19 @@ pub struct InconsistentVmDetails {
     #[serde(rename = "cloudName", default, skip_serializing_if = "Option::is_none")]
     pub cloud_name: Option<String>,
     #[doc = "The list of details regarding state of the Protected Entity in SRS and On prem."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<String>,
     #[doc = "The list of error ids."]
-    #[serde(rename = "errorIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_ids: Vec<String>,
 }
 impl InconsistentVmDetails {
@@ -10348,7 +10873,12 @@ pub struct InlineWorkflowTaskDetails {
     #[serde(flatten)]
     pub group_task_details: GroupTaskDetails,
     #[doc = "The list of child workflow ids."]
-    #[serde(rename = "workflowIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "workflowIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub workflow_ids: Vec<String>,
 }
 impl InlineWorkflowTaskDetails {
@@ -10484,7 +11014,11 @@ impl Job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCollection {
     #[doc = "The list of jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10589,10 +11123,18 @@ pub struct JobProperties {
     #[serde(rename = "stateDescription", default, skip_serializing_if = "Option::is_none")]
     pub state_description: Option<String>,
     #[doc = "The tasks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks: Vec<AsrTask>,
     #[doc = "The errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<JobErrorDetails>,
     #[doc = "The start time."]
     #[serde(rename = "startTime", default, with = "azure_core::date::rfc3339::option")]
@@ -10601,7 +11143,12 @@ pub struct JobProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The Allowed action the job."]
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
     #[doc = "The affected Object Id."]
     #[serde(rename = "targetObjectId", default, skip_serializing_if = "Option::is_none")]
@@ -10775,7 +11322,11 @@ impl LogicalNetwork {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogicalNetworkCollection {
     #[doc = "The Logical Networks list details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogicalNetwork>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10866,7 +11417,12 @@ pub struct MarsAgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<mars_agent_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl MarsAgentDetails {
@@ -10943,16 +11499,36 @@ pub struct MasterTargetServer {
     #[serde(rename = "versionStatus", default, skip_serializing_if = "Option::is_none")]
     pub version_status: Option<String>,
     #[doc = "The retention volumes of Master target Server."]
-    #[serde(rename = "retentionVolumes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionVolumes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_volumes: Vec<RetentionVolume>,
     #[doc = "The list of data stores in the fabric."]
-    #[serde(rename = "dataStores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataStores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_stores: Vec<DataStore>,
     #[doc = "Validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
     #[doc = "Health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "Disk count of the master target."]
     #[serde(rename = "diskCount", default, skip_serializing_if = "Option::is_none")]
@@ -11034,7 +11610,11 @@ impl MigrationItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationItemCollection {
     #[doc = "The list of migration items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrationItem>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11085,10 +11665,20 @@ pub struct MigrationItemProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<migration_item_properties::Health>,
     #[doc = "The list of health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The allowed operations on the migration item based on the current migration state of the item."]
-    #[serde(rename = "allowedOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_operations: Vec<String>,
     #[doc = "Current job details of the migration item."]
     #[serde(rename = "currentJob", default, skip_serializing_if = "Option::is_none")]
@@ -11297,7 +11887,11 @@ impl MigrationRecoveryPoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationRecoveryPointCollection {
     #[doc = "The migration recovery point details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrationRecoveryPoint>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11407,7 +12001,11 @@ impl Network {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkCollection {
     #[doc = "The Networks list details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Network>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11442,7 +12040,11 @@ impl NetworkMapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkMappingCollection {
     #[doc = "The Network Mappings list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkMapping>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11514,7 +12116,11 @@ pub struct NetworkProperties {
     #[serde(rename = "fabricType", default, skip_serializing_if = "Option::is_none")]
     pub fabric_type: Option<String>,
     #[doc = "The List of subnets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<Subnet>,
     #[doc = "The Friendly Name."]
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
@@ -11715,7 +12321,11 @@ impl OperationsDiscovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsDiscoveryCollection {
     #[doc = "The ClientDiscovery details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDiscovery>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11797,7 +12407,11 @@ impl Policy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyCollection {
     #[doc = "The policy details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Policy>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11878,7 +12492,12 @@ pub struct ProcessServer {
     #[serde(rename = "versionStatus", default, skip_serializing_if = "Option::is_none")]
     pub version_status: Option<String>,
     #[doc = "The list of the mobility service updates available on the Process Server."]
-    #[serde(rename = "mobilityServiceUpdates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mobilityServiceUpdates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mobility_service_updates: Vec<MobilityServiceUpdate>,
     #[doc = "The agent generated Id."]
     #[serde(rename = "hostId", default, skip_serializing_if = "Option::is_none")]
@@ -11932,7 +12551,12 @@ pub struct ProcessServer {
     #[serde(rename = "osVersion", default, skip_serializing_if = "Option::is_none")]
     pub os_version: Option<String>,
     #[doc = "Health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "Agent expiry date."]
     #[serde(rename = "agentExpiryDate", default, with = "azure_core::date::rfc3339::option")]
@@ -12033,7 +12657,12 @@ pub struct ProcessServerDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub fqdn: Option<String>,
     #[doc = "The list of IP addresses for communicating with the RCM component."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "The version."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -12096,7 +12725,12 @@ pub struct ProcessServerDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<process_server_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The protected item count."]
     #[serde(rename = "protectedItemCount", default, skip_serializing_if = "Option::is_none")]
@@ -12418,7 +13052,11 @@ impl ProtectableItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProtectableItemCollection {
     #[doc = "The Protectable item details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectableItem>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12451,10 +13089,20 @@ pub struct ProtectableItemProperties {
     #[serde(rename = "recoveryServicesProviderId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_services_provider_id: Option<String>,
     #[doc = "The Current protection readiness errors."]
-    #[serde(rename = "protectionReadinessErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectionReadinessErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protection_readiness_errors: Vec<String>,
     #[doc = "The list of replication providers supported for the protectable item."]
-    #[serde(rename = "supportedReplicationProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedReplicationProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_replication_providers: Vec<String>,
     #[doc = "Replication provider specific settings."]
     #[serde(rename = "customDetails", default, skip_serializing_if = "Option::is_none")]
@@ -12568,7 +13216,11 @@ impl ProtectionContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProtectionContainerCollection {
     #[doc = "The Protection Container details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionContainer>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12615,7 +13267,11 @@ impl ProtectionContainerMapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProtectionContainerMappingCollection {
     #[doc = "List of container mappings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionContainerMapping>,
     #[doc = "Link to fetch rest of the data."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12648,7 +13304,12 @@ pub struct ProtectionContainerMappingProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<String>,
     #[doc = "Health error."]
-    #[serde(rename = "healthErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_error_details: Vec<HealthError>,
     #[doc = "Policy ARM Id."]
     #[serde(rename = "policyId", default, skip_serializing_if = "Option::is_none")]
@@ -12792,7 +13453,12 @@ pub struct PushInstallerDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<push_installer_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl PushInstallerDetails {
@@ -12875,7 +13541,12 @@ pub struct RcmProxyDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<rcm_proxy_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl RcmProxyDetails {
@@ -13231,7 +13902,11 @@ pub mod recovery_plan_automation_runbook_action_details {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoveryPlanCollection {
     #[doc = "The list of recovery plans."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryPlan>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13255,13 +13930,28 @@ pub struct RecoveryPlanGroup {
     #[serde(rename = "groupType")]
     pub group_type: recovery_plan_group::GroupType,
     #[doc = "The list of protected items."]
-    #[serde(rename = "replicationProtectedItems", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replicationProtectedItems",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replication_protected_items: Vec<RecoveryPlanProtectedItem>,
     #[doc = "The start group actions."]
-    #[serde(rename = "startGroupActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "startGroupActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub start_group_actions: Vec<RecoveryPlanAction>,
     #[doc = "The end group actions."]
-    #[serde(rename = "endGroupActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endGroupActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub end_group_actions: Vec<RecoveryPlanAction>,
 }
 impl RecoveryPlanGroup {
@@ -13813,7 +14503,12 @@ pub struct RecoveryPlanPlannedFailoverInputProperties {
     #[serde(rename = "failoverDirection")]
     pub failover_direction: recovery_plan_planned_failover_input_properties::FailoverDirection,
     #[doc = "The provider specific properties."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificFailoverInput>,
 }
 impl RecoveryPlanPlannedFailoverInputProperties {
@@ -13886,10 +14581,20 @@ pub struct RecoveryPlanProperties {
     #[serde(rename = "failoverDeploymentModel", default, skip_serializing_if = "Option::is_none")]
     pub failover_deployment_model: Option<String>,
     #[doc = "The list of replication providers."]
-    #[serde(rename = "replicationProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replicationProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replication_providers: Vec<String>,
     #[doc = "The list of allowed operations."]
-    #[serde(rename = "allowedOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_operations: Vec<String>,
     #[doc = "The start time of the last planned failover."]
     #[serde(rename = "lastPlannedFailoverTime", default, with = "azure_core::date::rfc3339::option")]
@@ -13910,10 +14615,19 @@ pub struct RecoveryPlanProperties {
     #[serde(rename = "currentScenarioStatusDescription", default, skip_serializing_if = "Option::is_none")]
     pub current_scenario_status_description: Option<String>,
     #[doc = "The recovery plan groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<RecoveryPlanGroup>,
     #[doc = "The provider id and provider specific details."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificDetails>,
 }
 impl RecoveryPlanProperties {
@@ -14100,7 +14814,12 @@ pub struct RecoveryPlanTestFailoverInputProperties {
     #[serde(rename = "networkId", default, skip_serializing_if = "Option::is_none")]
     pub network_id: Option<String>,
     #[doc = "The provider specific properties."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificFailoverInput>,
 }
 impl RecoveryPlanTestFailoverInputProperties {
@@ -14174,7 +14893,12 @@ pub struct RecoveryPlanUnplannedFailoverInputProperties {
     #[serde(rename = "sourceSiteOperations")]
     pub source_site_operations: recovery_plan_unplanned_failover_input_properties::SourceSiteOperations,
     #[doc = "The provider specific properties."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificFailoverInput>,
 }
 impl RecoveryPlanUnplannedFailoverInputProperties {
@@ -14284,7 +15008,11 @@ impl RecoveryPoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoveryPointCollection {
     #[doc = "The recovery point details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryPoint>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14361,7 +15089,11 @@ impl RecoveryServicesProvider {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoveryServicesProviderCollection {
     #[doc = "The Servers details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryServicesProvider>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14412,10 +15144,20 @@ pub struct RecoveryServicesProviderProperties {
     #[serde(rename = "protectedItemCount", default, skip_serializing_if = "Option::is_none")]
     pub protected_item_count: Option<i32>,
     #[doc = "The scenarios allowed on this provider."]
-    #[serde(rename = "allowedScenarios", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedScenarios",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_scenarios: Vec<String>,
     #[doc = "The recovery services provider health error details."]
-    #[serde(rename = "healthErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_error_details: Vec<HealthError>,
     #[doc = "The DRA Id."]
     #[serde(rename = "draIdentifier", default, skip_serializing_if = "Option::is_none")]
@@ -14575,7 +15317,12 @@ pub struct ReplicationAgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<replication_agent_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl ReplicationAgentDetails {
@@ -14676,7 +15423,11 @@ impl ReplicationEligibilityResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationEligibilityResultsCollection {
     #[doc = "The replication eligibility results details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationEligibilityResults>,
 }
 impl ReplicationEligibilityResultsCollection {
@@ -14715,7 +15466,11 @@ pub struct ReplicationEligibilityResultsProperties {
     #[serde(rename = "clientRequestId", default, skip_serializing_if = "Option::is_none")]
     pub client_request_id: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ReplicationEligibilityResultsErrorInfo>,
 }
 impl ReplicationEligibilityResultsProperties {
@@ -14752,7 +15507,11 @@ impl ReplicationProtectedItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationProtectedItemCollection {
     #[doc = "The Replication protected item details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationProtectedItem>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14832,7 +15591,12 @@ pub struct ReplicationProtectedItemProperties {
     #[serde(rename = "switchProviderStateDescription", default, skip_serializing_if = "Option::is_none")]
     pub switch_provider_state_description: Option<String>,
     #[doc = "The allowed operations on the Replication protected item."]
-    #[serde(rename = "allowedOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_operations: Vec<String>,
     #[doc = "The consolidated protection health for the VM taking any issues with SRS as well as all the replication units associated with the VM's replication group into account. This is a string representation of the ProtectionHealth enumeration."]
     #[serde(rename = "replicationHealth", default, skip_serializing_if = "Option::is_none")]
@@ -14841,7 +15605,12 @@ pub struct ReplicationProtectedItemProperties {
     #[serde(rename = "failoverHealth", default, skip_serializing_if = "Option::is_none")]
     pub failover_health: Option<String>,
     #[doc = "List of health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The ID of Policy governing this PE."]
     #[serde(rename = "policyId", default, skip_serializing_if = "Option::is_none")]
@@ -14894,7 +15663,11 @@ impl ReplicationProtectionIntent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationProtectionIntentCollection {
     #[doc = "The Replication protection intent details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationProtectionIntent>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15038,13 +15811,23 @@ pub struct ReprotectAgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<reprotect_agent_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The protected item count."]
     #[serde(rename = "protectedItemCount", default, skip_serializing_if = "Option::is_none")]
     pub protected_item_count: Option<i32>,
     #[doc = "The list of accessible datastores fetched from discovery."]
-    #[serde(rename = "accessibleDatastores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessibleDatastores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accessible_datastores: Vec<String>,
     #[doc = "The Vcenter Id."]
     #[serde(rename = "vcenterId", default, skip_serializing_if = "Option::is_none")]
@@ -15130,7 +15913,12 @@ impl ResolveHealthInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResolveHealthInputProperties {
     #[doc = "Health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<ResolveHealthError>,
 }
 impl ResolveHealthInputProperties {
@@ -15166,7 +15954,11 @@ pub struct ResourceHealthSummary {
     #[serde(rename = "resourceCount", default, skip_serializing_if = "Option::is_none")]
     pub resource_count: Option<i32>,
     #[doc = "The list of summary of health errors across the resources under the container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issues: Vec<HealthErrorSummary>,
     #[doc = "The categorized resource counts."]
     #[serde(rename = "categorizedResourceCounts", default, skip_serializing_if = "Option::is_none")]
@@ -15418,7 +16210,11 @@ impl StorageClassification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageClassificationCollection {
     #[doc = "The storage details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageClassification>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15453,7 +16249,11 @@ impl StorageClassificationMapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageClassificationMappingCollection {
     #[doc = "The storage details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageClassificationMapping>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15528,7 +16328,12 @@ pub struct Subnet {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "The list of addresses for the subnet."]
-    #[serde(rename = "addressList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_list: Vec<String>,
 }
 impl Subnet {
@@ -15546,7 +16351,12 @@ pub struct SupportedOsDetails {
     #[serde(rename = "osType", default, skip_serializing_if = "Option::is_none")]
     pub os_type: Option<String>,
     #[doc = "The list of version for operating system."]
-    #[serde(rename = "osVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "osVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub os_versions: Vec<OsVersionWrapper>,
 }
 impl SupportedOsDetails {
@@ -15558,7 +16368,12 @@ impl SupportedOsDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedOsProperties {
     #[doc = "The supported operating systems property list."]
-    #[serde(rename = "supportedOsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_os_list: Vec<SupportedOsProperty>,
 }
 impl SupportedOsProperties {
@@ -15573,7 +16388,12 @@ pub struct SupportedOsProperty {
     #[serde(rename = "instanceType", default, skip_serializing_if = "Option::is_none")]
     pub instance_type: Option<String>,
     #[doc = "The list of supported operating systems."]
-    #[serde(rename = "supportedOs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_os: Vec<SupportedOsDetails>,
 }
 impl SupportedOsProperty {
@@ -15715,7 +16535,11 @@ impl TargetComputeSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TargetComputeSizeCollection {
     #[doc = "The list of target compute sizes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TargetComputeSize>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15757,13 +16581,22 @@ pub struct TargetComputeSizeProperties {
     #[serde(rename = "maxNicsCount", default, skip_serializing_if = "Option::is_none")]
     pub max_nics_count: Option<i32>,
     #[doc = "The reasons why the target compute size is not applicable for the protected item."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ComputeSizeErrorDetails>,
     #[doc = "The value indicating whether the target compute size supports high Iops."]
     #[serde(rename = "highIopsSupported", default, skip_serializing_if = "Option::is_none")]
     pub high_iops_supported: Option<String>,
     #[doc = "The supported HyperV Generations."]
-    #[serde(rename = "hyperVGenerations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hyperVGenerations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hyper_v_generations: Vec<String>,
 }
 impl TargetComputeSizeProperties {
@@ -15859,7 +16692,12 @@ pub struct TestFailoverJobDetails {
     #[serde(rename = "networkType", default, skip_serializing_if = "Option::is_none")]
     pub network_type: Option<String>,
     #[doc = "The test VM details."]
-    #[serde(rename = "protectedItemDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedItemDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_item_details: Vec<FailoverReplicationProtectedItemDetails>,
 }
 impl TestFailoverJobDetails {
@@ -16202,7 +17040,11 @@ impl UpdateRecoveryPlanInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UpdateRecoveryPlanInputProperties {
     #[doc = "The recovery plan groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<RecoveryPlanGroup>,
 }
 impl UpdateRecoveryPlanInputProperties {
@@ -16244,7 +17086,12 @@ pub struct UpdateReplicationProtectedItemInputProperties {
     #[serde(rename = "enableRdpOnTargetOption", default, skip_serializing_if = "Option::is_none")]
     pub enable_rdp_on_target_option: Option<String>,
     #[doc = "The list of VM nic details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicInputDetails>,
     #[doc = "License type."]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -16369,7 +17216,11 @@ impl VCenter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VCenterCollection {
     #[doc = "The vCenter details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VCenter>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16420,7 +17271,12 @@ pub struct VCenterProperties {
     #[serde(rename = "fabricArmResourceName", default, skip_serializing_if = "Option::is_none")]
     pub fabric_arm_resource_name: Option<String>,
     #[doc = "The health errors for this VCenter."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl VCenterProperties {
@@ -16447,7 +17303,12 @@ pub struct VmNicDetails {
     #[serde(rename = "recoveryVMNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_vm_network_id: Option<String>,
     #[doc = "The IP configurations of the NIC."]
-    #[serde(rename = "ipConfigs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configs: Vec<IpConfigDetails>,
     #[doc = "Selection type for failover."]
     #[serde(rename = "selectionType", default, skip_serializing_if = "Option::is_none")]
@@ -16501,7 +17362,12 @@ pub struct VmNicInputDetails {
     #[serde(rename = "nicId", default, skip_serializing_if = "Option::is_none")]
     pub nic_id: Option<String>,
     #[doc = "The IP configurations to be used by NIC during test failover and failover."]
-    #[serde(rename = "ipConfigs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configs: Vec<IpConfigInputDetails>,
     #[doc = "Selection type for failover."]
     #[serde(rename = "selectionType", default, skip_serializing_if = "Option::is_none")]
@@ -16963,13 +17829,23 @@ pub struct VMwareCbtMigrationDetails {
     #[serde(rename = "targetVmTags", default, skip_serializing_if = "Option::is_none")]
     pub target_vm_tags: Option<serde_json::Value>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<VMwareCbtProtectedDiskDetails>,
     #[doc = "The target network Id."]
     #[serde(rename = "targetNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub target_network_id: Option<String>,
     #[doc = "The network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VMwareCbtNicDetails>,
     #[doc = "The tags for the target NICs."]
     #[serde(rename = "targetNicTags", default, skip_serializing_if = "Option::is_none")]
@@ -17487,7 +18363,12 @@ pub struct VMwareCbtTestMigrateInput {
     #[serde(rename = "networkId")]
     pub network_id: String,
     #[doc = "The list of NIC details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VMwareCbtNicInput>,
 }
 impl VMwareCbtTestMigrateInput {
@@ -17559,10 +18440,20 @@ pub struct VMwareCbtUpdateMigrationItemInput {
     #[serde(rename = "testNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub test_network_id: Option<String>,
     #[doc = "The list of NIC details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VMwareCbtNicInput>,
     #[doc = "The list of disk update properties."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<VMwareCbtUpdateDiskInput>,
     #[doc = "The license type."]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -17698,13 +18589,28 @@ pub struct VMwareDetails {
     #[serde(flatten)]
     pub fabric_specific_details: FabricSpecificDetails,
     #[doc = "The list of Process Servers associated with the fabric."]
-    #[serde(rename = "processServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "processServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub process_servers: Vec<ProcessServer>,
     #[doc = "The list of Master Target servers associated with the fabric."]
-    #[serde(rename = "masterTargetServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "masterTargetServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub master_target_servers: Vec<MasterTargetServer>,
     #[doc = "The list of run as accounts created on the server."]
-    #[serde(rename = "runAsAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "runAsAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub run_as_accounts: Vec<RunAsAccount>,
     #[doc = "The number of replication pairs configured in this CS."]
     #[serde(rename = "replicationPairCount", default, skip_serializing_if = "Option::is_none")]
@@ -17794,7 +18700,12 @@ pub struct VMwareDetails {
     #[serde(rename = "agentVersionDetails", default, skip_serializing_if = "Option::is_none")]
     pub agent_version_details: Option<VersionDetails>,
     #[doc = "The switch provider blocking error information."]
-    #[serde(rename = "switchProviderBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "switchProviderBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub switch_provider_blocking_error_details: Vec<InMageFabricSwitchProviderBlockingErrorDetails>,
 }
 impl VMwareDetails {
@@ -17886,7 +18797,12 @@ pub struct VMwareV2FabricSpecificDetails {
     #[serde(rename = "serviceContainerId", default, skip_serializing_if = "Option::is_none")]
     pub service_container_id: Option<String>,
     #[doc = "The list of process servers."]
-    #[serde(rename = "processServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "processServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub process_servers: Vec<ProcessServerDetails>,
 }
 impl VMwareV2FabricSpecificDetails {
@@ -17933,10 +18849,20 @@ pub struct VMwareVirtualMachineDetails {
     #[serde(rename = "discoveryType", default, skip_serializing_if = "Option::is_none")]
     pub discovery_type: Option<String>,
     #[doc = "The disk details."]
-    #[serde(rename = "diskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_details: Vec<InMageDiskDetails>,
     #[doc = "The validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
 }
 impl VMwareVirtualMachineDetails {
@@ -17974,7 +18900,12 @@ impl VaultHealthDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultHealthProperties {
     #[doc = "The list of errors on the vault."]
-    #[serde(rename = "vaultErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_errors: Vec<HealthError>,
     #[doc = "Base class to define the health summary of the resources contained under an Arm resource."]
     #[serde(rename = "protectedItemsHealth", default, skip_serializing_if = "Option::is_none")]
@@ -18009,7 +18940,11 @@ impl VaultSetting {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultSettingCollection {
     #[doc = "The list of vault setting."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VaultSetting>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/recoveryservicessiterecovery/src/package_2022_05/models.rs b/services/mgmt/recoveryservicessiterecovery/src/package_2022_05/models.rs
index 7218c0bee7..f91de4a0f4 100644
--- a/services/mgmt/recoveryservicessiterecovery/src/package_2022_05/models.rs
+++ b/services/mgmt/recoveryservicessiterecovery/src/package_2022_05/models.rs
@@ -9,10 +9,20 @@ pub struct A2aAddDisksInput {
     #[serde(flatten)]
     pub add_disks_provider_specific_input: AddDisksProviderSpecificInput,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aVmManagedDiskInputDetails>,
 }
 impl A2aAddDisksInput {
@@ -209,10 +219,20 @@ pub struct A2aCreateProtectionIntentInput {
     #[serde(rename = "autoProtectionOfDataDisk", default, skip_serializing_if = "Option::is_none")]
     pub auto_protection_of_data_disk: Option<a2a_create_protection_intent_input::AutoProtectionOfDataDisk>,
     #[doc = "The list of vm disk inputs."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aProtectionIntentDiskInputDetails>,
     #[doc = "The list of vm managed disk inputs."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aProtectionIntentManagedDiskInputDetails>,
     #[doc = "The multi vm group name."]
     #[serde(rename = "multiVmGroupName", default, skip_serializing_if = "Option::is_none")]
@@ -557,10 +577,20 @@ pub struct A2aEnableProtectionInput {
     #[serde(rename = "recoveryProximityPlacementGroupId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_proximity_placement_group_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aVmManagedDiskInputDetails>,
     #[doc = "The multi vm group name."]
     #[serde(rename = "multiVmGroupName", default, skip_serializing_if = "Option::is_none")]
@@ -810,7 +840,12 @@ pub struct A2aProtectedDiskDetails {
     #[serde(rename = "diskState", default, skip_serializing_if = "Option::is_none")]
     pub disk_state: Option<String>,
     #[doc = "The disk level operations list."]
-    #[serde(rename = "allowedDiskLevelOperation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedDiskLevelOperation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_disk_level_operation: Vec<String>,
     #[doc = "A value indicating whether vm has encrypted os disk or not."]
     #[serde(rename = "isDiskEncrypted", default, skip_serializing_if = "Option::is_none")]
@@ -907,7 +942,12 @@ pub struct A2aProtectedManagedDiskDetails {
     #[serde(rename = "diskState", default, skip_serializing_if = "Option::is_none")]
     pub disk_state: Option<String>,
     #[doc = "The disk level operations list."]
-    #[serde(rename = "allowedDiskLevelOperation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedDiskLevelOperation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_disk_level_operation: Vec<String>,
     #[doc = "A value indicating whether vm has encrypted os disk or not."]
     #[serde(rename = "isDiskEncrypted", default, skip_serializing_if = "Option::is_none")]
@@ -1137,7 +1177,11 @@ pub struct A2aRecoveryPointDetails {
     #[serde(rename = "recoveryPointSyncType", default, skip_serializing_if = "Option::is_none")]
     pub recovery_point_sync_type: Option<a2a_recovery_point_details::RecoveryPointSyncType>,
     #[doc = "List of disk ids representing a recovery point."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<String>,
 }
 impl A2aRecoveryPointDetails {
@@ -1197,10 +1241,20 @@ pub struct A2aRemoveDisksInput {
     #[serde(flatten)]
     pub remove_disks_provider_specific_input: RemoveDisksProviderSpecificInput,
     #[doc = "The list of vm disk vhd URIs."]
-    #[serde(rename = "vmDisksUris", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisksUris",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks_uris: Vec<String>,
     #[doc = "The list of vm managed disk Ids."]
-    #[serde(rename = "vmManagedDisksIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisksIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks_ids: Vec<String>,
 }
 impl A2aRemoveDisksInput {
@@ -1251,13 +1305,28 @@ pub struct A2aReplicationDetails {
     #[serde(rename = "managementId", default, skip_serializing_if = "Option::is_none")]
     pub management_id: Option<String>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<A2aProtectedDiskDetails>,
     #[doc = "The list of unprotected disks."]
-    #[serde(rename = "unprotectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "unprotectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unprotected_disks: Vec<A2aUnprotectedDiskDetails>,
     #[doc = "The list of protected managed disks."]
-    #[serde(rename = "protectedManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_managed_disks: Vec<A2aProtectedManagedDiskDetails>,
     #[doc = "The recovery boot diagnostic storage account Arm Id."]
     #[serde(rename = "recoveryBootDiagStorageAccountId", default, skip_serializing_if = "Option::is_none")]
@@ -1293,7 +1362,12 @@ pub struct A2aReplicationDetails {
     #[serde(rename = "selectedTfoAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub selected_tfo_azure_network_id: Option<String>,
     #[doc = "The virtual machine nic details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "Azure to Azure VM synced configuration details."]
     #[serde(rename = "vmSyncedConfigDetails", default, skip_serializing_if = "Option::is_none")]
@@ -1575,10 +1649,20 @@ pub struct A2aReplicationIntentDetails {
     #[serde(rename = "recoverySubscriptionId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_subscription_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aProtectionIntentDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aProtectionIntentManagedDiskInputDetails>,
     #[doc = "The recovery resource group id."]
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -1791,7 +1875,12 @@ pub struct A2aReprotectInput {
     #[serde(rename = "recoveryContainerId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_container_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The recovery resource group Id. Valid for V2 scenarios."]
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -1828,10 +1917,20 @@ pub struct A2aSwitchProtectionInput {
     #[serde(rename = "recoveryContainerId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_container_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aVmManagedDiskInputDetails>,
     #[doc = "The recovery resource group Id. Valid for V2 scenarios."]
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -2104,7 +2203,12 @@ pub struct A2aUpdateReplicationProtectedItemInput {
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_resource_group_id: Option<String>,
     #[doc = "Managed disk update details."]
-    #[serde(rename = "managedDiskUpdateDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedDiskUpdateDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_disk_update_details: Vec<A2aVmManagedDiskUpdateDetails>,
     #[doc = "The boot diagnostic storage account."]
     #[serde(rename = "recoveryBootDiagStorageAccountId", default, skip_serializing_if = "Option::is_none")]
@@ -2259,7 +2363,12 @@ pub struct AsrTask {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The state/actions applicable on this task."]
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
     #[doc = "The name."]
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
@@ -2280,7 +2389,11 @@ pub struct AsrTask {
     #[serde(rename = "groupTaskCustomDetails", default, skip_serializing_if = "Option::is_none")]
     pub group_task_custom_details: Option<GroupTaskDetails>,
     #[doc = "The task error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<JobErrorDetails>,
 }
 impl AsrTask {
@@ -2425,7 +2538,11 @@ pub struct AgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub fqdn: Option<String>,
     #[doc = "The disks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<AgentDiskDetails>,
 }
 impl AgentDetails {
@@ -2475,7 +2592,11 @@ impl Alert {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertCollection {
     #[doc = "The list of alerts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2499,7 +2620,12 @@ pub struct AlertProperties {
     #[serde(rename = "sendToOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_to_owners: Option<String>,
     #[doc = "The custom email address for sending emails."]
-    #[serde(rename = "customEmailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customEmailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_email_addresses: Vec<String>,
     #[doc = "The locale for the email notification."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2514,7 +2640,11 @@ impl AlertProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplianceCollection {
     #[doc = "The appliance details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationAppliance>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2682,10 +2812,19 @@ pub struct AzureFabricSpecificDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "The container Ids for the Azure fabric."]
-    #[serde(rename = "containerIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_ids: Vec<String>,
     #[doc = "The zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<A2aZoneDetails>,
 }
 impl AzureFabricSpecificDetails {
@@ -2760,7 +2899,12 @@ pub struct AzureToAzureVmSyncedConfigDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<serde_json::Value>,
     #[doc = "The Azure VM input endpoints."]
-    #[serde(rename = "inputEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_endpoints: Vec<InputEndpoint>,
 }
 impl AzureToAzureVmSyncedConfigDetails {
@@ -2853,7 +2997,12 @@ pub struct ConfigureAlertRequestProperties {
     #[serde(rename = "sendToOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_to_owners: Option<String>,
     #[doc = "The custom email address for sending emails."]
-    #[serde(rename = "customEmailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customEmailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_email_addresses: Vec<String>,
     #[doc = "The locale for the email notification."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2870,7 +3019,12 @@ pub struct ConsistencyCheckTaskDetails {
     #[serde(flatten)]
     pub task_type_details: TaskTypeDetails,
     #[doc = "The list of inconsistent Vm details."]
-    #[serde(rename = "vmDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_details: Vec<InconsistentVmDetails>,
 }
 impl ConsistencyCheckTaskDetails {
@@ -2954,7 +3108,12 @@ impl CreateProtectionContainerInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CreateProtectionContainerInputProperties {
     #[doc = "Provider specific inputs for container creation."]
-    #[serde(rename = "providerSpecificInput", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificInput",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_input: Vec<ReplicationProviderSpecificContainerCreationInput>,
 }
 impl CreateProtectionContainerInputProperties {
@@ -3054,7 +3213,12 @@ pub struct CreateRecoveryPlanInputProperties {
     #[doc = "The recovery plan groups."]
     pub groups: Vec<RecoveryPlanGroup>,
     #[doc = "The provider specific input."]
-    #[serde(rename = "providerSpecificInput", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificInput",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_input: Vec<RecoveryPlanProviderSpecificInput>,
 }
 impl CreateRecoveryPlanInputProperties {
@@ -3408,7 +3572,12 @@ pub struct DraDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<dra_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The count of protected items which are protected in forward direction."]
     #[serde(rename = "forwardProtectedItemCount", default, skip_serializing_if = "Option::is_none")]
@@ -3585,7 +3754,11 @@ impl Event {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventCollection {
     #[doc = "The list of events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Event>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3636,7 +3809,12 @@ pub struct EventProperties {
     #[serde(rename = "eventSpecificDetails", default, skip_serializing_if = "Option::is_none")]
     pub event_specific_details: Option<EventSpecificDetails>,
     #[doc = "The list of errors / warnings capturing details associated with the issue(s)."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl EventProperties {
@@ -3898,7 +4076,11 @@ impl Fabric {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FabricCollection {
     #[doc = "The fabric details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Fabric>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3961,7 +4143,12 @@ pub struct FabricProperties {
     #[serde(rename = "customDetails", default, skip_serializing_if = "Option::is_none")]
     pub custom_details: Option<FabricSpecificDetails>,
     #[doc = "Fabric health error details."]
-    #[serde(rename = "healthErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_error_details: Vec<HealthError>,
     #[doc = "Health of fabric."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4074,7 +4261,12 @@ pub struct FailoverJobDetails {
     #[serde(flatten)]
     pub job_details: JobDetails,
     #[doc = "The test VM details."]
-    #[serde(rename = "protectedItemDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedItemDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_item_details: Vec<FailoverReplicationProtectedItemDetails>,
 }
 impl FailoverJobDetails {
@@ -4110,7 +4302,12 @@ pub struct FailoverProcessServerRequestProperties {
     #[serde(rename = "targetProcessServerId", default, skip_serializing_if = "Option::is_none")]
     pub target_process_server_id: Option<String>,
     #[doc = "The VMS to migrate."]
-    #[serde(rename = "vmsToMigrate", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmsToMigrate",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vms_to_migrate: Vec<String>,
     #[doc = "A value for failover type. It can be systemlevel/serverlevel."]
     #[serde(rename = "updateType", default, skip_serializing_if = "Option::is_none")]
@@ -4164,7 +4361,12 @@ pub struct GroupTaskDetails {
     #[serde(rename = "instanceType")]
     pub instance_type: String,
     #[doc = "The child tasks."]
-    #[serde(rename = "childTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_tasks: Vec<AsrTask>,
 }
 impl GroupTaskDetails {
@@ -4179,7 +4381,12 @@ impl GroupTaskDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthError {
     #[doc = "The inner health errors. HealthError having a list of HealthError as child errors is problematic. InnerHealthError is used because this will prevent an infinite loop of structures when Hydra tries to auto-generate the contract. We are exposing the related health errors as inner health errors and all API consumers can utilize this in the same fashion as Exception -&gt; InnerException."]
-    #[serde(rename = "innerHealthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "innerHealthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inner_health_errors: Vec<InnerHealthError>,
     #[doc = "Source of error."]
     #[serde(rename = "errorSource", default, skip_serializing_if = "Option::is_none")]
@@ -4291,7 +4498,12 @@ pub struct HealthErrorSummary {
     #[serde(rename = "affectedResourceSubtype", default, skip_serializing_if = "Option::is_none")]
     pub affected_resource_subtype: Option<String>,
     #[doc = "The list of affected resource correlation Ids. This can be used to uniquely identify the count of items affected by a specific category and severity as well as count of item affected by an specific issue."]
-    #[serde(rename = "affectedResourceCorrelationIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "affectedResourceCorrelationIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub affected_resource_correlation_ids: Vec<String>,
 }
 impl HealthErrorSummary {
@@ -4604,7 +4816,12 @@ pub struct HyperVReplicaAzureEnableProtectionInput {
     #[serde(rename = "logStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub log_storage_account_id: Option<String>,
     #[doc = "The list of VHD Ids of disks to be protected."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
     #[doc = "The Id of the target resource group (for classic deployment) in which the failover VM is to be created."]
     #[serde(rename = "targetAzureV1ResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -4640,7 +4857,12 @@ pub struct HyperVReplicaAzureEnableProtectionInput {
     #[serde(rename = "diskType", default, skip_serializing_if = "Option::is_none")]
     pub disk_type: Option<hyper_v_replica_azure_enable_protection_input::DiskType>,
     #[doc = "The disks to include list for managed disks."]
-    #[serde(rename = "disksToIncludeForManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToIncludeForManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include_for_managed_disks: Vec<HyperVReplicaAzureDiskInputDetails>,
     #[doc = "The DiskEncryptionSet ARM Id."]
     #[serde(rename = "diskEncryptionSetId", default, skip_serializing_if = "Option::is_none")]
@@ -4979,7 +5201,12 @@ pub struct HyperVReplicaAzurePolicyInput {
     #[serde(rename = "onlineReplicationStartTime", default, skip_serializing_if = "Option::is_none")]
     pub online_replication_start_time: Option<String>,
     #[doc = "The list of storage accounts to which the VMs in the primary cloud can replicate to."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<String>,
 }
 impl HyperVReplicaAzurePolicyInput {
@@ -5000,7 +5227,12 @@ pub struct HyperVReplicaAzureReplicationDetails {
     #[serde(flatten)]
     pub replication_provider_specific_settings: ReplicationProviderSpecificSettings,
     #[doc = "Azure VM Disk details."]
-    #[serde(rename = "azureVmDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureVmDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_vm_disk_details: Vec<AzureVmDiskDetails>,
     #[doc = "Recovery Azure given name."]
     #[serde(rename = "recoveryAzureVmName", default, skip_serializing_if = "Option::is_none")]
@@ -5036,7 +5268,12 @@ pub struct HyperVReplicaAzureReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The selected recovery azure network Id."]
     #[serde(rename = "selectedRecoveryAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -5096,7 +5333,12 @@ pub struct HyperVReplicaAzureReplicationDetails {
     #[serde(rename = "targetNicTags", default, skip_serializing_if = "Option::is_none")]
     pub target_nic_tags: Option<serde_json::Value>,
     #[doc = "The list of protected managed disks."]
-    #[serde(rename = "protectedManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_managed_disks: Vec<HyperVReplicaAzureManagedDiskDetails>,
 }
 impl HyperVReplicaAzureReplicationDetails {
@@ -5262,7 +5504,12 @@ pub struct HyperVReplicaAzureUpdateReplicationProtectedItemInput {
     #[serde(rename = "sqlServerLicenseType", default, skip_serializing_if = "Option::is_none")]
     pub sql_server_license_type: Option<hyper_v_replica_azure_update_replication_protected_item_input::SqlServerLicenseType>,
     #[doc = "The list of disk update properties."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<UpdateDiskInput>,
 }
 impl HyperVReplicaAzureUpdateReplicationProtectedItemInput {
@@ -5424,7 +5671,12 @@ pub struct HyperVReplicaBaseReplicationDetails {
     #[serde(rename = "lastReplicatedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_replicated_time: Option<time::OffsetDateTime>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The virtual machine Id."]
     #[serde(rename = "vmId", default, skip_serializing_if = "Option::is_none")]
@@ -5439,7 +5691,12 @@ pub struct HyperVReplicaBaseReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "VM disk details."]
-    #[serde(rename = "vMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_m_disk_details: Vec<DiskDetails>,
 }
 impl HyperVReplicaBaseReplicationDetails {
@@ -5543,7 +5800,12 @@ pub struct HyperVReplicaBlueReplicationDetails {
     #[serde(rename = "lastReplicatedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_replicated_time: Option<time::OffsetDateTime>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The virtual machine Id."]
     #[serde(rename = "vmId", default, skip_serializing_if = "Option::is_none")]
@@ -5558,7 +5820,12 @@ pub struct HyperVReplicaBlueReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "VM disk details."]
-    #[serde(rename = "vMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_m_disk_details: Vec<DiskDetails>,
 }
 impl HyperVReplicaBlueReplicationDetails {
@@ -5698,7 +5965,12 @@ pub struct HyperVReplicaReplicationDetails {
     #[serde(rename = "lastReplicatedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_replicated_time: Option<time::OffsetDateTime>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The virtual machine Id."]
     #[serde(rename = "vmId", default, skip_serializing_if = "Option::is_none")]
@@ -5713,7 +5985,12 @@ pub struct HyperVReplicaReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "VM disk details."]
-    #[serde(rename = "vMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_m_disk_details: Vec<DiskDetails>,
 }
 impl HyperVReplicaReplicationDetails {
@@ -5736,7 +6013,12 @@ pub struct HyperVSiteDetails {
     #[serde(flatten)]
     pub fabric_specific_details: FabricSpecificDetails,
     #[doc = "The list of Hyper-V hosts associated with the fabric."]
-    #[serde(rename = "hyperVHosts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hyperVHosts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hyper_v_hosts: Vec<HyperVHostDetails>,
 }
 impl HyperVSiteDetails {
@@ -5762,7 +6044,12 @@ pub struct HyperVVirtualMachineDetails {
     #[serde(rename = "osDetails", default, skip_serializing_if = "Option::is_none")]
     pub os_details: Option<OsDetails>,
     #[doc = "The Last successful failover time."]
-    #[serde(rename = "diskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_details: Vec<DiskDetails>,
     #[doc = "A value indicating whether the VM has a physical disk attached. String value of SrsDataContract.PresenceStatus enum."]
     #[serde(rename = "hasPhysicalDisk", default, skip_serializing_if = "Option::is_none")]
@@ -5934,7 +6221,12 @@ pub struct IpConfigDetails {
     pub recovery_ip_address_type: Option<String>,
     #[serde(rename = "recoveryPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_public_ip_address_id: Option<String>,
-    #[serde(rename = "recoveryLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_lb_backend_address_pool_ids: Vec<String>,
     #[serde(rename = "tfoSubnetName", default, skip_serializing_if = "Option::is_none")]
     pub tfo_subnet_name: Option<String>,
@@ -5942,7 +6234,12 @@ pub struct IpConfigDetails {
     pub tfo_static_ip_address: Option<String>,
     #[serde(rename = "tfoPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub tfo_public_ip_address_id: Option<String>,
-    #[serde(rename = "tfoLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tfoLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tfo_lb_backend_address_pool_ids: Vec<String>,
 }
 impl IpConfigDetails {
@@ -5964,7 +6261,12 @@ pub struct IpConfigInputDetails {
     pub recovery_static_ip_address: Option<String>,
     #[serde(rename = "recoveryPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_public_ip_address_id: Option<String>,
-    #[serde(rename = "recoveryLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_lb_backend_address_pool_ids: Vec<String>,
     #[serde(rename = "tfoSubnetName", default, skip_serializing_if = "Option::is_none")]
     pub tfo_subnet_name: Option<String>,
@@ -5972,7 +6274,12 @@ pub struct IpConfigInputDetails {
     pub tfo_static_ip_address: Option<String>,
     #[serde(rename = "tfoPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub tfo_public_ip_address_id: Option<String>,
-    #[serde(rename = "tfoLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tfoLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tfo_lb_backend_address_pool_ids: Vec<String>,
 }
 impl IpConfigInputDetails {
@@ -6157,7 +6464,12 @@ pub struct InMageAzureV2EnableProtectionInput {
     #[serde(rename = "multiVmGroupName", default, skip_serializing_if = "Option::is_none")]
     pub multi_vm_group_name: Option<String>,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<InMageAzureV2DiskInputDetails>,
     #[doc = "The selected target Azure network Id."]
     #[serde(rename = "targetAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -6715,7 +7027,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "multiVmSyncStatus", default, skip_serializing_if = "Option::is_none")]
     pub multi_vm_sync_status: Option<String>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageAzureV2ProtectedDiskDetails>,
     #[doc = "A value indicating whether any disk is resized for this VM."]
     #[serde(rename = "diskResized", default, skip_serializing_if = "Option::is_none")]
@@ -6739,7 +7056,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "osDiskId", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_id: Option<String>,
     #[doc = "Azure VM Disk details."]
-    #[serde(rename = "azureVMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureVMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_vm_disk_details: Vec<AzureVmDiskDetails>,
     #[doc = "Recovery Azure given name."]
     #[serde(rename = "recoveryAzureVMName", default, skip_serializing_if = "Option::is_none")]
@@ -6754,7 +7076,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "recoveryAzureLogStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_azure_log_storage_account_id: Option<String>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The selected recovery azure network Id."]
     #[serde(rename = "selectedRecoveryAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -6772,7 +7099,11 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "enableRdpOnTargetOption", default, skip_serializing_if = "Option::is_none")]
     pub enable_rdp_on_target_option: Option<String>,
     #[doc = "The datastores of the on-premise machine. Value can be list of strings that contain datastore names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The ARM Id of the target Azure VM. This value will be null until the VM is failed over. Only after failure it will be populated with the ARM Id of the Azure VM."]
     #[serde(rename = "targetVmId", default, skip_serializing_if = "Option::is_none")]
@@ -6799,7 +7130,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "sqlServerLicenseType", default, skip_serializing_if = "Option::is_none")]
     pub sql_server_license_type: Option<String>,
     #[doc = "The validation errors of the on-premise machine Value can be list of validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
     #[doc = "The last RPO calculated time."]
     #[serde(rename = "lastRpoCalculatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -6814,7 +7150,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "osVersion", default, skip_serializing_if = "Option::is_none")]
     pub os_version: Option<String>,
     #[doc = "The list of protected managed disks."]
-    #[serde(rename = "protectedManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_managed_disks: Vec<InMageAzureV2ManagedDiskDetails>,
     #[doc = "The last recovery point received time."]
     #[serde(rename = "lastRecoveryPointReceived", default, with = "azure_core::date::rfc3339::option")]
@@ -6847,7 +7188,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "targetNicTags", default, skip_serializing_if = "Option::is_none")]
     pub target_nic_tags: Option<serde_json::Value>,
     #[doc = "The switch provider blocking error information."]
-    #[serde(rename = "switchProviderBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "switchProviderBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub switch_provider_blocking_error_details: Vec<InMageAzureV2SwitchProviderBlockingErrorDetails>,
     #[doc = "InMageAzureV2 switch provider details."]
     #[serde(rename = "switchProviderDetails", default, skip_serializing_if = "Option::is_none")]
@@ -6951,7 +7297,12 @@ pub struct InMageAzureV2ReprotectInput {
     #[serde(rename = "logStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub log_storage_account_id: Option<String>,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
 }
 impl InMageAzureV2ReprotectInput {
@@ -7113,7 +7464,12 @@ pub struct InMageAzureV2UpdateReplicationProtectedItemInput {
     #[serde(rename = "sqlServerLicenseType", default, skip_serializing_if = "Option::is_none")]
     pub sql_server_license_type: Option<in_mage_azure_v2_update_replication_protected_item_input::SqlServerLicenseType>,
     #[doc = "The list of disk update properties."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<UpdateDiskInput>,
 }
 impl InMageAzureV2UpdateReplicationProtectedItemInput {
@@ -7244,7 +7600,12 @@ pub struct InMageDiskDetails {
     #[serde(rename = "diskConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub disk_configuration: Option<String>,
     #[doc = "Volumes of the disk."]
-    #[serde(rename = "volumeList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_list: Vec<DiskVolumeDetails>,
 }
 impl InMageDiskDetails {
@@ -7256,10 +7617,20 @@ impl InMageDiskDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InMageDiskExclusionInput {
     #[doc = "The volume label based option for disk exclusion."]
-    #[serde(rename = "volumeOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_options: Vec<InMageVolumeExclusionOptions>,
     #[doc = "The guest disk signature based option for disk exclusion."]
-    #[serde(rename = "diskSignatureOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskSignatureOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_signature_options: Vec<InMageDiskSignatureExclusionOptions>,
 }
 impl InMageDiskExclusionInput {
@@ -7312,7 +7683,12 @@ pub struct InMageEnableProtectionInput {
     #[serde(rename = "diskExclusionInput", default, skip_serializing_if = "Option::is_none")]
     pub disk_exclusion_input: Option<InMageDiskExclusionInput>,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
 }
 impl InMageEnableProtectionInput {
@@ -7603,7 +7979,12 @@ pub struct InMageRcmApplianceDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub dra: Option<DraDetails>,
     #[doc = "The switch provider blocking error information."]
-    #[serde(rename = "switchProviderBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "switchProviderBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub switch_provider_blocking_error_details: Vec<InMageRcmFabricSwitchProviderBlockingErrorDetails>,
 }
 impl InMageRcmApplianceDetails {
@@ -7617,7 +7998,11 @@ pub struct InMageRcmApplianceSpecificDetails {
     #[serde(flatten)]
     pub appliance_specific_details: ApplianceSpecificDetails,
     #[doc = "The list of appliances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub appliances: Vec<InMageRcmApplianceDetails>,
 }
 impl InMageRcmApplianceSpecificDetails {
@@ -7655,10 +8040,19 @@ pub struct InMageRcmDiscoveredProtectedVmDetails {
     #[serde(rename = "vCenterFqdn", default, skip_serializing_if = "Option::is_none")]
     pub v_center_fqdn: Option<String>,
     #[doc = "The list of datastores."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The list of IP addresses."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "The VMware tools status."]
     #[serde(rename = "vmwareToolsStatus", default, skip_serializing_if = "Option::is_none")]
@@ -7837,7 +8231,12 @@ pub struct InMageRcmEnableProtectionInput {
     #[serde(rename = "fabricDiscoveryMachineId")]
     pub fabric_discovery_machine_id: String,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<InMageRcmDiskInput>,
     #[doc = "InMageRcm disk input."]
     #[serde(rename = "disksDefault", default, skip_serializing_if = "Option::is_none")]
@@ -8065,28 +8464,67 @@ pub struct InMageRcmFabricSpecificDetails {
     #[serde(rename = "sourceAgentIdentityDetails", default, skip_serializing_if = "Option::is_none")]
     pub source_agent_identity_details: Option<IdentityProviderDetails>,
     #[doc = "The list of process servers."]
-    #[serde(rename = "processServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "processServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub process_servers: Vec<ProcessServerDetails>,
     #[doc = "The list of RCM proxies."]
-    #[serde(rename = "rcmProxies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rcmProxies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rcm_proxies: Vec<RcmProxyDetails>,
     #[doc = "The list of push installers."]
-    #[serde(rename = "pushInstallers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pushInstallers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub push_installers: Vec<PushInstallerDetails>,
     #[doc = "The list of replication agents."]
-    #[serde(rename = "replicationAgents", default, skip_serializing_if = "Vec::is_empty")]
-    pub replication_agents: Vec<ReplicationAgentDetails>,
+    #[serde(
+        rename = "replicationAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
+    pub replication_agents: Vec<ReplicationAgentDetails>,
     #[doc = "The list of reprotect agents."]
-    #[serde(rename = "reprotectAgents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reprotectAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reprotect_agents: Vec<ReprotectAgentDetails>,
     #[doc = "The list of Mars agents."]
-    #[serde(rename = "marsAgents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "marsAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mars_agents: Vec<MarsAgentDetails>,
     #[doc = "The list of DRAs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dras: Vec<DraDetails>,
     #[doc = "The list of agent details."]
-    #[serde(rename = "agentDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_details: Vec<AgentDetails>,
 }
 impl InMageRcmFabricSpecificDetails {
@@ -8149,10 +8587,19 @@ pub struct InMageRcmFailbackDiscoveredProtectedVmDetails {
     #[serde(rename = "vCenterFqdn", default, skip_serializing_if = "Option::is_none")]
     pub v_center_fqdn: Option<String>,
     #[doc = "The list of datastores."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The list of IP addresses."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "The VMware tools status."]
     #[serde(rename = "vmwareToolsStatus", default, skip_serializing_if = "Option::is_none")]
@@ -8242,7 +8689,12 @@ pub struct InMageRcmFailbackMobilityAgentDetails {
     #[serde(rename = "lastHeartbeatUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_heartbeat_utc: Option<time::OffsetDateTime>,
     #[doc = "The whether update is possible or not."]
-    #[serde(rename = "reasonsBlockingUpgrade", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reasonsBlockingUpgrade",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons_blocking_upgrade: Vec<String>,
     #[doc = "A value indicating whether agent is upgradeable or not."]
     #[serde(rename = "isUpgradeable", default, skip_serializing_if = "Option::is_none")]
@@ -8484,13 +8936,23 @@ pub struct InMageRcmFailbackReplicationDetails {
     #[serde(rename = "resyncState", default, skip_serializing_if = "Option::is_none")]
     pub resync_state: Option<in_mage_rcm_failback_replication_details::ResyncState>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageRcmFailbackProtectedDiskDetails>,
     #[doc = "InMageRcmFailback mobility agent details."]
     #[serde(rename = "mobilityAgentDetails", default, skip_serializing_if = "Option::is_none")]
     pub mobility_agent_details: Option<InMageRcmFailbackMobilityAgentDetails>,
     #[doc = "The network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<InMageRcmFailbackNicDetails>,
     #[doc = "The last planned failover start time."]
     #[serde(rename = "lastPlannedFailoverStartTime", default, with = "azure_core::date::rfc3339::option")]
@@ -8881,7 +9343,12 @@ pub struct InMageRcmMobilityAgentDetails {
     #[serde(rename = "lastHeartbeatUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_heartbeat_utc: Option<time::OffsetDateTime>,
     #[doc = "The whether update is possible or not."]
-    #[serde(rename = "reasonsBlockingUpgrade", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reasonsBlockingUpgrade",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons_blocking_upgrade: Vec<String>,
     #[doc = "A value indicating whether agent is upgradeable or not."]
     #[serde(rename = "isUpgradeable", default, skip_serializing_if = "Option::is_none")]
@@ -9421,7 +9888,12 @@ pub struct InMageRcmReplicationDetails {
     #[serde(rename = "agentUpgradeAttemptToVersion", default, skip_serializing_if = "Option::is_none")]
     pub agent_upgrade_attempt_to_version: Option<String>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageRcmProtectedDiskDetails>,
     #[doc = "A value indicating whether last agent upgrade was successful or not."]
     #[serde(rename = "isLastUpgradeSuccessful", default, skip_serializing_if = "Option::is_none")]
@@ -9437,13 +9909,28 @@ pub struct InMageRcmReplicationDetails {
     #[serde(rename = "mobilityAgentDetails", default, skip_serializing_if = "Option::is_none")]
     pub mobility_agent_details: Option<InMageRcmMobilityAgentDetails>,
     #[doc = "The last agent upgrade error information."]
-    #[serde(rename = "lastAgentUpgradeErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "lastAgentUpgradeErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub last_agent_upgrade_error_details: Vec<InMageRcmLastAgentUpgradeErrorDetails>,
     #[doc = "The agent upgrade blocking error information."]
-    #[serde(rename = "agentUpgradeBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentUpgradeBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_upgrade_blocking_error_details: Vec<InMageRcmAgentUpgradeBlockingErrorDetails>,
     #[doc = "The network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<InMageRcmNicDetails>,
     #[doc = "InMageRcm discovered protected VM details."]
     #[serde(rename = "discoveredVmDetails", default, skip_serializing_if = "Option::is_none")]
@@ -9903,7 +10390,12 @@ pub struct InMageRcmUpdateReplicationProtectedItemInput {
     #[serde(rename = "testNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub test_network_id: Option<String>,
     #[doc = "The list of NIC details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<InMageRcmNicInput>,
     #[doc = "The license type."]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -10017,7 +10509,12 @@ pub struct InMageReplicationDetails {
     #[serde(rename = "rpoInSeconds", default, skip_serializing_if = "Option::is_none")]
     pub rpo_in_seconds: Option<i64>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageProtectedDiskDetails>,
     #[doc = "The source IP address."]
     #[serde(rename = "ipAddress", default, skip_serializing_if = "Option::is_none")]
@@ -10059,7 +10556,12 @@ pub struct InMageReplicationDetails {
     #[serde(rename = "infrastructureVmId", default, skip_serializing_if = "Option::is_none")]
     pub infrastructure_vm_id: Option<String>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "A value indicating the discovery type of the machine."]
     #[serde(rename = "discoveryType", default, skip_serializing_if = "Option::is_none")]
@@ -10068,10 +10570,19 @@ pub struct InMageReplicationDetails {
     #[serde(rename = "azureStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub azure_storage_account_id: Option<String>,
     #[doc = "The datastores of the on-premise machine Value can be list of strings that contain datastore names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The validation errors of the on-premise machine Value can be list of validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
     #[doc = "The last RPO calculated time."]
     #[serde(rename = "lastRpoCalculatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -10169,7 +10680,12 @@ pub struct InMageReprotectInput {
     #[serde(rename = "profileId")]
     pub profile_id: String,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
 }
 impl InMageReprotectInput {
@@ -10344,10 +10860,19 @@ pub struct InconsistentVmDetails {
     #[serde(rename = "cloudName", default, skip_serializing_if = "Option::is_none")]
     pub cloud_name: Option<String>,
     #[doc = "The list of details regarding state of the Protected Entity in SRS and On prem."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<String>,
     #[doc = "The list of error ids."]
-    #[serde(rename = "errorIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_ids: Vec<String>,
 }
 impl InconsistentVmDetails {
@@ -10376,7 +10901,12 @@ pub struct InlineWorkflowTaskDetails {
     #[serde(flatten)]
     pub group_task_details: GroupTaskDetails,
     #[doc = "The list of child workflow ids."]
-    #[serde(rename = "workflowIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "workflowIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub workflow_ids: Vec<String>,
 }
 impl InlineWorkflowTaskDetails {
@@ -10512,7 +11042,11 @@ impl Job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCollection {
     #[doc = "The list of jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10617,10 +11151,18 @@ pub struct JobProperties {
     #[serde(rename = "stateDescription", default, skip_serializing_if = "Option::is_none")]
     pub state_description: Option<String>,
     #[doc = "The tasks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks: Vec<AsrTask>,
     #[doc = "The errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<JobErrorDetails>,
     #[doc = "The start time."]
     #[serde(rename = "startTime", default, with = "azure_core::date::rfc3339::option")]
@@ -10629,7 +11171,12 @@ pub struct JobProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The Allowed action the job."]
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
     #[doc = "The affected Object Id."]
     #[serde(rename = "targetObjectId", default, skip_serializing_if = "Option::is_none")]
@@ -10803,7 +11350,11 @@ impl LogicalNetwork {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogicalNetworkCollection {
     #[doc = "The Logical Networks list details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogicalNetwork>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10894,7 +11445,12 @@ pub struct MarsAgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<mars_agent_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl MarsAgentDetails {
@@ -10971,16 +11527,36 @@ pub struct MasterTargetServer {
     #[serde(rename = "versionStatus", default, skip_serializing_if = "Option::is_none")]
     pub version_status: Option<String>,
     #[doc = "The retention volumes of Master target Server."]
-    #[serde(rename = "retentionVolumes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionVolumes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_volumes: Vec<RetentionVolume>,
     #[doc = "The list of data stores in the fabric."]
-    #[serde(rename = "dataStores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataStores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_stores: Vec<DataStore>,
     #[doc = "Validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
     #[doc = "Health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "Disk count of the master target."]
     #[serde(rename = "diskCount", default, skip_serializing_if = "Option::is_none")]
@@ -11062,7 +11638,11 @@ impl MigrationItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationItemCollection {
     #[doc = "The list of migration items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrationItem>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11125,16 +11705,31 @@ pub struct MigrationItemProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<migration_item_properties::Health>,
     #[doc = "The list of health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The allowed operations on the migration item based on the current migration state of the item."]
-    #[serde(rename = "allowedOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_operations: Vec<String>,
     #[doc = "Current job details of the migration item."]
     #[serde(rename = "currentJob", default, skip_serializing_if = "Option::is_none")]
     pub current_job: Option<CurrentJobDetails>,
     #[doc = "The critical past job details."]
-    #[serde(rename = "criticalJobHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "criticalJobHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub critical_job_history: Vec<CriticalJobHistoryDetails>,
     #[doc = "The correlation Id for events associated with this migration item."]
     #[serde(rename = "eventCorrelationId", default, skip_serializing_if = "Option::is_none")]
@@ -11364,7 +11959,11 @@ impl MigrationRecoveryPoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationRecoveryPointCollection {
     #[doc = "The migration recovery point details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrationRecoveryPoint>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11474,7 +12073,11 @@ impl Network {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkCollection {
     #[doc = "The Networks list details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Network>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11509,7 +12112,11 @@ impl NetworkMapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkMappingCollection {
     #[doc = "The Network Mappings list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkMapping>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11581,7 +12188,11 @@ pub struct NetworkProperties {
     #[serde(rename = "fabricType", default, skip_serializing_if = "Option::is_none")]
     pub fabric_type: Option<String>,
     #[doc = "The List of subnets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<Subnet>,
     #[doc = "The Friendly Name."]
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
@@ -11782,7 +12393,11 @@ impl OperationsDiscovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsDiscoveryCollection {
     #[doc = "The ClientDiscovery details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDiscovery>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11887,7 +12502,11 @@ impl Policy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyCollection {
     #[doc = "The policy details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Policy>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11968,7 +12587,12 @@ pub struct ProcessServer {
     #[serde(rename = "versionStatus", default, skip_serializing_if = "Option::is_none")]
     pub version_status: Option<String>,
     #[doc = "The list of the mobility service updates available on the Process Server."]
-    #[serde(rename = "mobilityServiceUpdates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mobilityServiceUpdates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mobility_service_updates: Vec<MobilityServiceUpdate>,
     #[doc = "The agent generated Id."]
     #[serde(rename = "hostId", default, skip_serializing_if = "Option::is_none")]
@@ -12022,7 +12646,12 @@ pub struct ProcessServer {
     #[serde(rename = "osVersion", default, skip_serializing_if = "Option::is_none")]
     pub os_version: Option<String>,
     #[doc = "Health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "Agent expiry date."]
     #[serde(rename = "agentExpiryDate", default, with = "azure_core::date::rfc3339::option")]
@@ -12123,7 +12752,12 @@ pub struct ProcessServerDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub fqdn: Option<String>,
     #[doc = "The list of IP addresses for communicating with the RCM component."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "The version."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -12186,7 +12820,12 @@ pub struct ProcessServerDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<process_server_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The protected item count."]
     #[serde(rename = "protectedItemCount", default, skip_serializing_if = "Option::is_none")]
@@ -12508,7 +13147,11 @@ impl ProtectableItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProtectableItemCollection {
     #[doc = "The Protectable item details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectableItem>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12541,10 +13184,20 @@ pub struct ProtectableItemProperties {
     #[serde(rename = "recoveryServicesProviderId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_services_provider_id: Option<String>,
     #[doc = "The Current protection readiness errors."]
-    #[serde(rename = "protectionReadinessErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectionReadinessErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protection_readiness_errors: Vec<String>,
     #[doc = "The list of replication providers supported for the protectable item."]
-    #[serde(rename = "supportedReplicationProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedReplicationProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_replication_providers: Vec<String>,
     #[doc = "Replication provider specific settings."]
     #[serde(rename = "customDetails", default, skip_serializing_if = "Option::is_none")]
@@ -12658,7 +13311,11 @@ impl ProtectionContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProtectionContainerCollection {
     #[doc = "The Protection Container details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionContainer>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12705,7 +13362,11 @@ impl ProtectionContainerMapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProtectionContainerMappingCollection {
     #[doc = "List of container mappings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionContainerMapping>,
     #[doc = "Link to fetch rest of the data."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12738,7 +13399,12 @@ pub struct ProtectionContainerMappingProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<String>,
     #[doc = "Health error."]
-    #[serde(rename = "healthErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_error_details: Vec<HealthError>,
     #[doc = "Policy ARM Id."]
     #[serde(rename = "policyId", default, skip_serializing_if = "Option::is_none")]
@@ -12882,7 +13548,12 @@ pub struct PushInstallerDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<push_installer_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl PushInstallerDetails {
@@ -12965,7 +13636,12 @@ pub struct RcmProxyDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<rcm_proxy_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl RcmProxyDetails {
@@ -13321,7 +13997,11 @@ pub mod recovery_plan_automation_runbook_action_details {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoveryPlanCollection {
     #[doc = "The list of recovery plans."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryPlan>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13345,13 +14025,28 @@ pub struct RecoveryPlanGroup {
     #[serde(rename = "groupType")]
     pub group_type: recovery_plan_group::GroupType,
     #[doc = "The list of protected items."]
-    #[serde(rename = "replicationProtectedItems", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replicationProtectedItems",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replication_protected_items: Vec<RecoveryPlanProtectedItem>,
     #[doc = "The start group actions."]
-    #[serde(rename = "startGroupActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "startGroupActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub start_group_actions: Vec<RecoveryPlanAction>,
     #[doc = "The end group actions."]
-    #[serde(rename = "endGroupActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endGroupActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub end_group_actions: Vec<RecoveryPlanAction>,
 }
 impl RecoveryPlanGroup {
@@ -13903,7 +14598,12 @@ pub struct RecoveryPlanPlannedFailoverInputProperties {
     #[serde(rename = "failoverDirection")]
     pub failover_direction: recovery_plan_planned_failover_input_properties::FailoverDirection,
     #[doc = "The provider specific properties."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificFailoverInput>,
 }
 impl RecoveryPlanPlannedFailoverInputProperties {
@@ -13976,10 +14676,20 @@ pub struct RecoveryPlanProperties {
     #[serde(rename = "failoverDeploymentModel", default, skip_serializing_if = "Option::is_none")]
     pub failover_deployment_model: Option<String>,
     #[doc = "The list of replication providers."]
-    #[serde(rename = "replicationProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replicationProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replication_providers: Vec<String>,
     #[doc = "The list of allowed operations."]
-    #[serde(rename = "allowedOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_operations: Vec<String>,
     #[doc = "The start time of the last planned failover."]
     #[serde(rename = "lastPlannedFailoverTime", default, with = "azure_core::date::rfc3339::option")]
@@ -14000,10 +14710,19 @@ pub struct RecoveryPlanProperties {
     #[serde(rename = "currentScenarioStatusDescription", default, skip_serializing_if = "Option::is_none")]
     pub current_scenario_status_description: Option<String>,
     #[doc = "The recovery plan groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<RecoveryPlanGroup>,
     #[doc = "The provider id and provider specific details."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificDetails>,
 }
 impl RecoveryPlanProperties {
@@ -14190,7 +14909,12 @@ pub struct RecoveryPlanTestFailoverInputProperties {
     #[serde(rename = "networkId", default, skip_serializing_if = "Option::is_none")]
     pub network_id: Option<String>,
     #[doc = "The provider specific properties."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificFailoverInput>,
 }
 impl RecoveryPlanTestFailoverInputProperties {
@@ -14264,7 +14988,12 @@ pub struct RecoveryPlanUnplannedFailoverInputProperties {
     #[serde(rename = "sourceSiteOperations")]
     pub source_site_operations: recovery_plan_unplanned_failover_input_properties::SourceSiteOperations,
     #[doc = "The provider specific properties."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificFailoverInput>,
 }
 impl RecoveryPlanUnplannedFailoverInputProperties {
@@ -14374,7 +15103,11 @@ impl RecoveryPoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoveryPointCollection {
     #[doc = "The recovery point details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryPoint>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14451,7 +15184,11 @@ impl RecoveryServicesProvider {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoveryServicesProviderCollection {
     #[doc = "The Servers details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryServicesProvider>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14502,10 +15239,20 @@ pub struct RecoveryServicesProviderProperties {
     #[serde(rename = "protectedItemCount", default, skip_serializing_if = "Option::is_none")]
     pub protected_item_count: Option<i32>,
     #[doc = "The scenarios allowed on this provider."]
-    #[serde(rename = "allowedScenarios", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedScenarios",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_scenarios: Vec<String>,
     #[doc = "The recovery services provider health error details."]
-    #[serde(rename = "healthErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_error_details: Vec<HealthError>,
     #[doc = "The DRA Id."]
     #[serde(rename = "draIdentifier", default, skip_serializing_if = "Option::is_none")]
@@ -14665,7 +15412,12 @@ pub struct ReplicationAgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<replication_agent_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl ReplicationAgentDetails {
@@ -14766,7 +15518,11 @@ impl ReplicationEligibilityResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationEligibilityResultsCollection {
     #[doc = "The replication eligibility results details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationEligibilityResults>,
 }
 impl ReplicationEligibilityResultsCollection {
@@ -14805,7 +15561,11 @@ pub struct ReplicationEligibilityResultsProperties {
     #[serde(rename = "clientRequestId", default, skip_serializing_if = "Option::is_none")]
     pub client_request_id: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ReplicationEligibilityResultsErrorInfo>,
 }
 impl ReplicationEligibilityResultsProperties {
@@ -14842,7 +15602,11 @@ impl ReplicationProtectedItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationProtectedItemCollection {
     #[doc = "The Replication protected item details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationProtectedItem>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14922,7 +15686,12 @@ pub struct ReplicationProtectedItemProperties {
     #[serde(rename = "switchProviderStateDescription", default, skip_serializing_if = "Option::is_none")]
     pub switch_provider_state_description: Option<String>,
     #[doc = "The allowed operations on the Replication protected item."]
-    #[serde(rename = "allowedOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_operations: Vec<String>,
     #[doc = "The consolidated protection health for the VM taking any issues with SRS as well as all the replication units associated with the VM's replication group into account. This is a string representation of the ProtectionHealth enumeration."]
     #[serde(rename = "replicationHealth", default, skip_serializing_if = "Option::is_none")]
@@ -14931,7 +15700,12 @@ pub struct ReplicationProtectedItemProperties {
     #[serde(rename = "failoverHealth", default, skip_serializing_if = "Option::is_none")]
     pub failover_health: Option<String>,
     #[doc = "List of health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The ID of Policy governing this PE."]
     #[serde(rename = "policyId", default, skip_serializing_if = "Option::is_none")]
@@ -14984,7 +15758,11 @@ impl ReplicationProtectionIntent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationProtectionIntentCollection {
     #[doc = "The Replication protection intent details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationProtectionIntent>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15128,13 +15906,23 @@ pub struct ReprotectAgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<reprotect_agent_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The protected item count."]
     #[serde(rename = "protectedItemCount", default, skip_serializing_if = "Option::is_none")]
     pub protected_item_count: Option<i32>,
     #[doc = "The list of accessible datastores fetched from discovery."]
-    #[serde(rename = "accessibleDatastores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessibleDatastores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accessible_datastores: Vec<String>,
     #[doc = "The Vcenter Id."]
     #[serde(rename = "vcenterId", default, skip_serializing_if = "Option::is_none")]
@@ -15220,7 +16008,12 @@ impl ResolveHealthInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResolveHealthInputProperties {
     #[doc = "Health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<ResolveHealthError>,
 }
 impl ResolveHealthInputProperties {
@@ -15256,7 +16049,11 @@ pub struct ResourceHealthSummary {
     #[serde(rename = "resourceCount", default, skip_serializing_if = "Option::is_none")]
     pub resource_count: Option<i32>,
     #[doc = "The list of summary of health errors across the resources under the container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issues: Vec<HealthErrorSummary>,
     #[doc = "The categorized resource counts."]
     #[serde(rename = "categorizedResourceCounts", default, skip_serializing_if = "Option::is_none")]
@@ -15543,7 +16340,11 @@ impl StorageClassification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageClassificationCollection {
     #[doc = "The storage details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageClassification>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15578,7 +16379,11 @@ impl StorageClassificationMapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageClassificationMappingCollection {
     #[doc = "The storage details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageClassificationMapping>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15653,7 +16458,12 @@ pub struct Subnet {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "The list of addresses for the subnet."]
-    #[serde(rename = "addressList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_list: Vec<String>,
 }
 impl Subnet {
@@ -15671,7 +16481,12 @@ pub struct SupportedOsDetails {
     #[serde(rename = "osType", default, skip_serializing_if = "Option::is_none")]
     pub os_type: Option<String>,
     #[doc = "The list of version for operating system."]
-    #[serde(rename = "osVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "osVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub os_versions: Vec<OsVersionWrapper>,
 }
 impl SupportedOsDetails {
@@ -15683,7 +16498,12 @@ impl SupportedOsDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedOsProperties {
     #[doc = "The supported operating systems property list."]
-    #[serde(rename = "supportedOsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_os_list: Vec<SupportedOsProperty>,
 }
 impl SupportedOsProperties {
@@ -15698,7 +16518,12 @@ pub struct SupportedOsProperty {
     #[serde(rename = "instanceType", default, skip_serializing_if = "Option::is_none")]
     pub instance_type: Option<String>,
     #[doc = "The list of supported operating systems."]
-    #[serde(rename = "supportedOs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_os: Vec<SupportedOsDetails>,
 }
 impl SupportedOsProperty {
@@ -15840,7 +16665,11 @@ impl TargetComputeSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TargetComputeSizeCollection {
     #[doc = "The list of target compute sizes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TargetComputeSize>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15882,13 +16711,22 @@ pub struct TargetComputeSizeProperties {
     #[serde(rename = "maxNicsCount", default, skip_serializing_if = "Option::is_none")]
     pub max_nics_count: Option<i32>,
     #[doc = "The reasons why the target compute size is not applicable for the protected item."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ComputeSizeErrorDetails>,
     #[doc = "The value indicating whether the target compute size supports high Iops."]
     #[serde(rename = "highIopsSupported", default, skip_serializing_if = "Option::is_none")]
     pub high_iops_supported: Option<String>,
     #[doc = "The supported HyperV Generations."]
-    #[serde(rename = "hyperVGenerations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hyperVGenerations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hyper_v_generations: Vec<String>,
 }
 impl TargetComputeSizeProperties {
@@ -15984,7 +16822,12 @@ pub struct TestFailoverJobDetails {
     #[serde(rename = "networkType", default, skip_serializing_if = "Option::is_none")]
     pub network_type: Option<String>,
     #[doc = "The test VM details."]
-    #[serde(rename = "protectedItemDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedItemDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_item_details: Vec<FailoverReplicationProtectedItemDetails>,
 }
 impl TestFailoverJobDetails {
@@ -16327,7 +17170,11 @@ impl UpdateRecoveryPlanInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UpdateRecoveryPlanInputProperties {
     #[doc = "The recovery plan groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<RecoveryPlanGroup>,
 }
 impl UpdateRecoveryPlanInputProperties {
@@ -16369,7 +17216,12 @@ pub struct UpdateReplicationProtectedItemInputProperties {
     #[serde(rename = "enableRdpOnTargetOption", default, skip_serializing_if = "Option::is_none")]
     pub enable_rdp_on_target_option: Option<String>,
     #[doc = "The list of VM nic details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicInputDetails>,
     #[doc = "License type."]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -16494,7 +17346,11 @@ impl VCenter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VCenterCollection {
     #[doc = "The vCenter details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VCenter>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16545,7 +17401,12 @@ pub struct VCenterProperties {
     #[serde(rename = "fabricArmResourceName", default, skip_serializing_if = "Option::is_none")]
     pub fabric_arm_resource_name: Option<String>,
     #[doc = "The health errors for this VCenter."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl VCenterProperties {
@@ -16572,7 +17433,12 @@ pub struct VmNicDetails {
     #[serde(rename = "recoveryVMNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_vm_network_id: Option<String>,
     #[doc = "The IP configurations of the NIC."]
-    #[serde(rename = "ipConfigs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configs: Vec<IpConfigDetails>,
     #[doc = "Selection type for failover."]
     #[serde(rename = "selectionType", default, skip_serializing_if = "Option::is_none")]
@@ -16626,7 +17492,12 @@ pub struct VmNicInputDetails {
     #[serde(rename = "nicId", default, skip_serializing_if = "Option::is_none")]
     pub nic_id: Option<String>,
     #[doc = "The IP configurations to be used by NIC during test failover and failover."]
-    #[serde(rename = "ipConfigs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configs: Vec<IpConfigInputDetails>,
     #[doc = "Selection type for failover."]
     #[serde(rename = "selectionType", default, skip_serializing_if = "Option::is_none")]
@@ -17091,7 +17962,12 @@ pub struct VMwareCbtMigrationDetails {
     #[serde(rename = "targetVmTags", default, skip_serializing_if = "Option::is_none")]
     pub target_vm_tags: Option<serde_json::Value>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<VMwareCbtProtectedDiskDetails>,
     #[doc = "The target network Id."]
     #[serde(rename = "targetNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -17100,7 +17976,12 @@ pub struct VMwareCbtMigrationDetails {
     #[serde(rename = "testNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub test_network_id: Option<String>,
     #[doc = "The network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VMwareCbtNicDetails>,
     #[doc = "The tags for the target NICs."]
     #[serde(rename = "targetNicTags", default, skip_serializing_if = "Option::is_none")]
@@ -17655,7 +18536,12 @@ pub struct VMwareCbtTestMigrateInput {
     #[serde(rename = "networkId")]
     pub network_id: String,
     #[doc = "The list of NIC details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VMwareCbtNicInput>,
 }
 impl VMwareCbtTestMigrateInput {
@@ -17727,10 +18613,20 @@ pub struct VMwareCbtUpdateMigrationItemInput {
     #[serde(rename = "testNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub test_network_id: Option<String>,
     #[doc = "The list of NIC details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VMwareCbtNicInput>,
     #[doc = "The list of disk update properties."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<VMwareCbtUpdateDiskInput>,
     #[doc = "The license type."]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -17866,13 +18762,28 @@ pub struct VMwareDetails {
     #[serde(flatten)]
     pub fabric_specific_details: FabricSpecificDetails,
     #[doc = "The list of Process Servers associated with the fabric."]
-    #[serde(rename = "processServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "processServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub process_servers: Vec<ProcessServer>,
     #[doc = "The list of Master Target servers associated with the fabric."]
-    #[serde(rename = "masterTargetServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "masterTargetServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub master_target_servers: Vec<MasterTargetServer>,
     #[doc = "The list of run as accounts created on the server."]
-    #[serde(rename = "runAsAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "runAsAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub run_as_accounts: Vec<RunAsAccount>,
     #[doc = "The number of replication pairs configured in this CS."]
     #[serde(rename = "replicationPairCount", default, skip_serializing_if = "Option::is_none")]
@@ -17962,7 +18873,12 @@ pub struct VMwareDetails {
     #[serde(rename = "agentVersionDetails", default, skip_serializing_if = "Option::is_none")]
     pub agent_version_details: Option<VersionDetails>,
     #[doc = "The switch provider blocking error information."]
-    #[serde(rename = "switchProviderBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "switchProviderBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub switch_provider_blocking_error_details: Vec<InMageFabricSwitchProviderBlockingErrorDetails>,
 }
 impl VMwareDetails {
@@ -18054,7 +18970,12 @@ pub struct VMwareV2FabricSpecificDetails {
     #[serde(rename = "serviceContainerId", default, skip_serializing_if = "Option::is_none")]
     pub service_container_id: Option<String>,
     #[doc = "The list of process servers."]
-    #[serde(rename = "processServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "processServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub process_servers: Vec<ProcessServerDetails>,
 }
 impl VMwareV2FabricSpecificDetails {
@@ -18101,10 +19022,20 @@ pub struct VMwareVirtualMachineDetails {
     #[serde(rename = "discoveryType", default, skip_serializing_if = "Option::is_none")]
     pub discovery_type: Option<String>,
     #[doc = "The disk details."]
-    #[serde(rename = "diskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_details: Vec<InMageDiskDetails>,
     #[doc = "The validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
 }
 impl VMwareVirtualMachineDetails {
@@ -18142,7 +19073,12 @@ impl VaultHealthDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultHealthProperties {
     #[doc = "The list of errors on the vault."]
-    #[serde(rename = "vaultErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_errors: Vec<HealthError>,
     #[doc = "Base class to define the health summary of the resources contained under an Arm resource."]
     #[serde(rename = "protectedItemsHealth", default, skip_serializing_if = "Option::is_none")]
@@ -18177,7 +19113,11 @@ impl VaultSetting {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultSettingCollection {
     #[doc = "The list of vault setting."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VaultSetting>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/recoveryservicessiterecovery/src/package_2022_08/models.rs b/services/mgmt/recoveryservicessiterecovery/src/package_2022_08/models.rs
index 7218c0bee7..f91de4a0f4 100644
--- a/services/mgmt/recoveryservicessiterecovery/src/package_2022_08/models.rs
+++ b/services/mgmt/recoveryservicessiterecovery/src/package_2022_08/models.rs
@@ -9,10 +9,20 @@ pub struct A2aAddDisksInput {
     #[serde(flatten)]
     pub add_disks_provider_specific_input: AddDisksProviderSpecificInput,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aVmManagedDiskInputDetails>,
 }
 impl A2aAddDisksInput {
@@ -209,10 +219,20 @@ pub struct A2aCreateProtectionIntentInput {
     #[serde(rename = "autoProtectionOfDataDisk", default, skip_serializing_if = "Option::is_none")]
     pub auto_protection_of_data_disk: Option<a2a_create_protection_intent_input::AutoProtectionOfDataDisk>,
     #[doc = "The list of vm disk inputs."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aProtectionIntentDiskInputDetails>,
     #[doc = "The list of vm managed disk inputs."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aProtectionIntentManagedDiskInputDetails>,
     #[doc = "The multi vm group name."]
     #[serde(rename = "multiVmGroupName", default, skip_serializing_if = "Option::is_none")]
@@ -557,10 +577,20 @@ pub struct A2aEnableProtectionInput {
     #[serde(rename = "recoveryProximityPlacementGroupId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_proximity_placement_group_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aVmManagedDiskInputDetails>,
     #[doc = "The multi vm group name."]
     #[serde(rename = "multiVmGroupName", default, skip_serializing_if = "Option::is_none")]
@@ -810,7 +840,12 @@ pub struct A2aProtectedDiskDetails {
     #[serde(rename = "diskState", default, skip_serializing_if = "Option::is_none")]
     pub disk_state: Option<String>,
     #[doc = "The disk level operations list."]
-    #[serde(rename = "allowedDiskLevelOperation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedDiskLevelOperation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_disk_level_operation: Vec<String>,
     #[doc = "A value indicating whether vm has encrypted os disk or not."]
     #[serde(rename = "isDiskEncrypted", default, skip_serializing_if = "Option::is_none")]
@@ -907,7 +942,12 @@ pub struct A2aProtectedManagedDiskDetails {
     #[serde(rename = "diskState", default, skip_serializing_if = "Option::is_none")]
     pub disk_state: Option<String>,
     #[doc = "The disk level operations list."]
-    #[serde(rename = "allowedDiskLevelOperation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedDiskLevelOperation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_disk_level_operation: Vec<String>,
     #[doc = "A value indicating whether vm has encrypted os disk or not."]
     #[serde(rename = "isDiskEncrypted", default, skip_serializing_if = "Option::is_none")]
@@ -1137,7 +1177,11 @@ pub struct A2aRecoveryPointDetails {
     #[serde(rename = "recoveryPointSyncType", default, skip_serializing_if = "Option::is_none")]
     pub recovery_point_sync_type: Option<a2a_recovery_point_details::RecoveryPointSyncType>,
     #[doc = "List of disk ids representing a recovery point."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<String>,
 }
 impl A2aRecoveryPointDetails {
@@ -1197,10 +1241,20 @@ pub struct A2aRemoveDisksInput {
     #[serde(flatten)]
     pub remove_disks_provider_specific_input: RemoveDisksProviderSpecificInput,
     #[doc = "The list of vm disk vhd URIs."]
-    #[serde(rename = "vmDisksUris", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisksUris",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks_uris: Vec<String>,
     #[doc = "The list of vm managed disk Ids."]
-    #[serde(rename = "vmManagedDisksIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisksIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks_ids: Vec<String>,
 }
 impl A2aRemoveDisksInput {
@@ -1251,13 +1305,28 @@ pub struct A2aReplicationDetails {
     #[serde(rename = "managementId", default, skip_serializing_if = "Option::is_none")]
     pub management_id: Option<String>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<A2aProtectedDiskDetails>,
     #[doc = "The list of unprotected disks."]
-    #[serde(rename = "unprotectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "unprotectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unprotected_disks: Vec<A2aUnprotectedDiskDetails>,
     #[doc = "The list of protected managed disks."]
-    #[serde(rename = "protectedManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_managed_disks: Vec<A2aProtectedManagedDiskDetails>,
     #[doc = "The recovery boot diagnostic storage account Arm Id."]
     #[serde(rename = "recoveryBootDiagStorageAccountId", default, skip_serializing_if = "Option::is_none")]
@@ -1293,7 +1362,12 @@ pub struct A2aReplicationDetails {
     #[serde(rename = "selectedTfoAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub selected_tfo_azure_network_id: Option<String>,
     #[doc = "The virtual machine nic details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "Azure to Azure VM synced configuration details."]
     #[serde(rename = "vmSyncedConfigDetails", default, skip_serializing_if = "Option::is_none")]
@@ -1575,10 +1649,20 @@ pub struct A2aReplicationIntentDetails {
     #[serde(rename = "recoverySubscriptionId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_subscription_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aProtectionIntentDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aProtectionIntentManagedDiskInputDetails>,
     #[doc = "The recovery resource group id."]
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -1791,7 +1875,12 @@ pub struct A2aReprotectInput {
     #[serde(rename = "recoveryContainerId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_container_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The recovery resource group Id. Valid for V2 scenarios."]
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -1828,10 +1917,20 @@ pub struct A2aSwitchProtectionInput {
     #[serde(rename = "recoveryContainerId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_container_id: Option<String>,
     #[doc = "The list of vm disk details."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<A2aVmDiskInputDetails>,
     #[doc = "The list of vm managed disk details."]
-    #[serde(rename = "vmManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_managed_disks: Vec<A2aVmManagedDiskInputDetails>,
     #[doc = "The recovery resource group Id. Valid for V2 scenarios."]
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -2104,7 +2203,12 @@ pub struct A2aUpdateReplicationProtectedItemInput {
     #[serde(rename = "recoveryResourceGroupId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_resource_group_id: Option<String>,
     #[doc = "Managed disk update details."]
-    #[serde(rename = "managedDiskUpdateDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedDiskUpdateDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_disk_update_details: Vec<A2aVmManagedDiskUpdateDetails>,
     #[doc = "The boot diagnostic storage account."]
     #[serde(rename = "recoveryBootDiagStorageAccountId", default, skip_serializing_if = "Option::is_none")]
@@ -2259,7 +2363,12 @@ pub struct AsrTask {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The state/actions applicable on this task."]
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
     #[doc = "The name."]
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
@@ -2280,7 +2389,11 @@ pub struct AsrTask {
     #[serde(rename = "groupTaskCustomDetails", default, skip_serializing_if = "Option::is_none")]
     pub group_task_custom_details: Option<GroupTaskDetails>,
     #[doc = "The task error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<JobErrorDetails>,
 }
 impl AsrTask {
@@ -2425,7 +2538,11 @@ pub struct AgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub fqdn: Option<String>,
     #[doc = "The disks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<AgentDiskDetails>,
 }
 impl AgentDetails {
@@ -2475,7 +2592,11 @@ impl Alert {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AlertCollection {
     #[doc = "The list of alerts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Alert>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2499,7 +2620,12 @@ pub struct AlertProperties {
     #[serde(rename = "sendToOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_to_owners: Option<String>,
     #[doc = "The custom email address for sending emails."]
-    #[serde(rename = "customEmailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customEmailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_email_addresses: Vec<String>,
     #[doc = "The locale for the email notification."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2514,7 +2640,11 @@ impl AlertProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplianceCollection {
     #[doc = "The appliance details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationAppliance>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2682,10 +2812,19 @@ pub struct AzureFabricSpecificDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "The container Ids for the Azure fabric."]
-    #[serde(rename = "containerIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_ids: Vec<String>,
     #[doc = "The zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<A2aZoneDetails>,
 }
 impl AzureFabricSpecificDetails {
@@ -2760,7 +2899,12 @@ pub struct AzureToAzureVmSyncedConfigDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<serde_json::Value>,
     #[doc = "The Azure VM input endpoints."]
-    #[serde(rename = "inputEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_endpoints: Vec<InputEndpoint>,
 }
 impl AzureToAzureVmSyncedConfigDetails {
@@ -2853,7 +2997,12 @@ pub struct ConfigureAlertRequestProperties {
     #[serde(rename = "sendToOwners", default, skip_serializing_if = "Option::is_none")]
     pub send_to_owners: Option<String>,
     #[doc = "The custom email address for sending emails."]
-    #[serde(rename = "customEmailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customEmailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_email_addresses: Vec<String>,
     #[doc = "The locale for the email notification."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2870,7 +3019,12 @@ pub struct ConsistencyCheckTaskDetails {
     #[serde(flatten)]
     pub task_type_details: TaskTypeDetails,
     #[doc = "The list of inconsistent Vm details."]
-    #[serde(rename = "vmDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_details: Vec<InconsistentVmDetails>,
 }
 impl ConsistencyCheckTaskDetails {
@@ -2954,7 +3108,12 @@ impl CreateProtectionContainerInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CreateProtectionContainerInputProperties {
     #[doc = "Provider specific inputs for container creation."]
-    #[serde(rename = "providerSpecificInput", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificInput",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_input: Vec<ReplicationProviderSpecificContainerCreationInput>,
 }
 impl CreateProtectionContainerInputProperties {
@@ -3054,7 +3213,12 @@ pub struct CreateRecoveryPlanInputProperties {
     #[doc = "The recovery plan groups."]
     pub groups: Vec<RecoveryPlanGroup>,
     #[doc = "The provider specific input."]
-    #[serde(rename = "providerSpecificInput", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificInput",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_input: Vec<RecoveryPlanProviderSpecificInput>,
 }
 impl CreateRecoveryPlanInputProperties {
@@ -3408,7 +3572,12 @@ pub struct DraDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<dra_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The count of protected items which are protected in forward direction."]
     #[serde(rename = "forwardProtectedItemCount", default, skip_serializing_if = "Option::is_none")]
@@ -3585,7 +3754,11 @@ impl Event {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventCollection {
     #[doc = "The list of events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Event>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3636,7 +3809,12 @@ pub struct EventProperties {
     #[serde(rename = "eventSpecificDetails", default, skip_serializing_if = "Option::is_none")]
     pub event_specific_details: Option<EventSpecificDetails>,
     #[doc = "The list of errors / warnings capturing details associated with the issue(s)."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl EventProperties {
@@ -3898,7 +4076,11 @@ impl Fabric {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FabricCollection {
     #[doc = "The fabric details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Fabric>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3961,7 +4143,12 @@ pub struct FabricProperties {
     #[serde(rename = "customDetails", default, skip_serializing_if = "Option::is_none")]
     pub custom_details: Option<FabricSpecificDetails>,
     #[doc = "Fabric health error details."]
-    #[serde(rename = "healthErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_error_details: Vec<HealthError>,
     #[doc = "Health of fabric."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4074,7 +4261,12 @@ pub struct FailoverJobDetails {
     #[serde(flatten)]
     pub job_details: JobDetails,
     #[doc = "The test VM details."]
-    #[serde(rename = "protectedItemDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedItemDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_item_details: Vec<FailoverReplicationProtectedItemDetails>,
 }
 impl FailoverJobDetails {
@@ -4110,7 +4302,12 @@ pub struct FailoverProcessServerRequestProperties {
     #[serde(rename = "targetProcessServerId", default, skip_serializing_if = "Option::is_none")]
     pub target_process_server_id: Option<String>,
     #[doc = "The VMS to migrate."]
-    #[serde(rename = "vmsToMigrate", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmsToMigrate",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vms_to_migrate: Vec<String>,
     #[doc = "A value for failover type. It can be systemlevel/serverlevel."]
     #[serde(rename = "updateType", default, skip_serializing_if = "Option::is_none")]
@@ -4164,7 +4361,12 @@ pub struct GroupTaskDetails {
     #[serde(rename = "instanceType")]
     pub instance_type: String,
     #[doc = "The child tasks."]
-    #[serde(rename = "childTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_tasks: Vec<AsrTask>,
 }
 impl GroupTaskDetails {
@@ -4179,7 +4381,12 @@ impl GroupTaskDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthError {
     #[doc = "The inner health errors. HealthError having a list of HealthError as child errors is problematic. InnerHealthError is used because this will prevent an infinite loop of structures when Hydra tries to auto-generate the contract. We are exposing the related health errors as inner health errors and all API consumers can utilize this in the same fashion as Exception -&gt; InnerException."]
-    #[serde(rename = "innerHealthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "innerHealthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inner_health_errors: Vec<InnerHealthError>,
     #[doc = "Source of error."]
     #[serde(rename = "errorSource", default, skip_serializing_if = "Option::is_none")]
@@ -4291,7 +4498,12 @@ pub struct HealthErrorSummary {
     #[serde(rename = "affectedResourceSubtype", default, skip_serializing_if = "Option::is_none")]
     pub affected_resource_subtype: Option<String>,
     #[doc = "The list of affected resource correlation Ids. This can be used to uniquely identify the count of items affected by a specific category and severity as well as count of item affected by an specific issue."]
-    #[serde(rename = "affectedResourceCorrelationIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "affectedResourceCorrelationIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub affected_resource_correlation_ids: Vec<String>,
 }
 impl HealthErrorSummary {
@@ -4604,7 +4816,12 @@ pub struct HyperVReplicaAzureEnableProtectionInput {
     #[serde(rename = "logStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub log_storage_account_id: Option<String>,
     #[doc = "The list of VHD Ids of disks to be protected."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
     #[doc = "The Id of the target resource group (for classic deployment) in which the failover VM is to be created."]
     #[serde(rename = "targetAzureV1ResourceGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -4640,7 +4857,12 @@ pub struct HyperVReplicaAzureEnableProtectionInput {
     #[serde(rename = "diskType", default, skip_serializing_if = "Option::is_none")]
     pub disk_type: Option<hyper_v_replica_azure_enable_protection_input::DiskType>,
     #[doc = "The disks to include list for managed disks."]
-    #[serde(rename = "disksToIncludeForManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToIncludeForManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include_for_managed_disks: Vec<HyperVReplicaAzureDiskInputDetails>,
     #[doc = "The DiskEncryptionSet ARM Id."]
     #[serde(rename = "diskEncryptionSetId", default, skip_serializing_if = "Option::is_none")]
@@ -4979,7 +5201,12 @@ pub struct HyperVReplicaAzurePolicyInput {
     #[serde(rename = "onlineReplicationStartTime", default, skip_serializing_if = "Option::is_none")]
     pub online_replication_start_time: Option<String>,
     #[doc = "The list of storage accounts to which the VMs in the primary cloud can replicate to."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<String>,
 }
 impl HyperVReplicaAzurePolicyInput {
@@ -5000,7 +5227,12 @@ pub struct HyperVReplicaAzureReplicationDetails {
     #[serde(flatten)]
     pub replication_provider_specific_settings: ReplicationProviderSpecificSettings,
     #[doc = "Azure VM Disk details."]
-    #[serde(rename = "azureVmDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureVmDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_vm_disk_details: Vec<AzureVmDiskDetails>,
     #[doc = "Recovery Azure given name."]
     #[serde(rename = "recoveryAzureVmName", default, skip_serializing_if = "Option::is_none")]
@@ -5036,7 +5268,12 @@ pub struct HyperVReplicaAzureReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The selected recovery azure network Id."]
     #[serde(rename = "selectedRecoveryAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -5096,7 +5333,12 @@ pub struct HyperVReplicaAzureReplicationDetails {
     #[serde(rename = "targetNicTags", default, skip_serializing_if = "Option::is_none")]
     pub target_nic_tags: Option<serde_json::Value>,
     #[doc = "The list of protected managed disks."]
-    #[serde(rename = "protectedManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_managed_disks: Vec<HyperVReplicaAzureManagedDiskDetails>,
 }
 impl HyperVReplicaAzureReplicationDetails {
@@ -5262,7 +5504,12 @@ pub struct HyperVReplicaAzureUpdateReplicationProtectedItemInput {
     #[serde(rename = "sqlServerLicenseType", default, skip_serializing_if = "Option::is_none")]
     pub sql_server_license_type: Option<hyper_v_replica_azure_update_replication_protected_item_input::SqlServerLicenseType>,
     #[doc = "The list of disk update properties."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<UpdateDiskInput>,
 }
 impl HyperVReplicaAzureUpdateReplicationProtectedItemInput {
@@ -5424,7 +5671,12 @@ pub struct HyperVReplicaBaseReplicationDetails {
     #[serde(rename = "lastReplicatedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_replicated_time: Option<time::OffsetDateTime>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The virtual machine Id."]
     #[serde(rename = "vmId", default, skip_serializing_if = "Option::is_none")]
@@ -5439,7 +5691,12 @@ pub struct HyperVReplicaBaseReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "VM disk details."]
-    #[serde(rename = "vMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_m_disk_details: Vec<DiskDetails>,
 }
 impl HyperVReplicaBaseReplicationDetails {
@@ -5543,7 +5800,12 @@ pub struct HyperVReplicaBlueReplicationDetails {
     #[serde(rename = "lastReplicatedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_replicated_time: Option<time::OffsetDateTime>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The virtual machine Id."]
     #[serde(rename = "vmId", default, skip_serializing_if = "Option::is_none")]
@@ -5558,7 +5820,12 @@ pub struct HyperVReplicaBlueReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "VM disk details."]
-    #[serde(rename = "vMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_m_disk_details: Vec<DiskDetails>,
 }
 impl HyperVReplicaBlueReplicationDetails {
@@ -5698,7 +5965,12 @@ pub struct HyperVReplicaReplicationDetails {
     #[serde(rename = "lastReplicatedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_replicated_time: Option<time::OffsetDateTime>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The virtual machine Id."]
     #[serde(rename = "vmId", default, skip_serializing_if = "Option::is_none")]
@@ -5713,7 +5985,12 @@ pub struct HyperVReplicaReplicationDetails {
     #[serde(rename = "initialReplicationDetails", default, skip_serializing_if = "Option::is_none")]
     pub initial_replication_details: Option<InitialReplicationDetails>,
     #[doc = "VM disk details."]
-    #[serde(rename = "vMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_m_disk_details: Vec<DiskDetails>,
 }
 impl HyperVReplicaReplicationDetails {
@@ -5736,7 +6013,12 @@ pub struct HyperVSiteDetails {
     #[serde(flatten)]
     pub fabric_specific_details: FabricSpecificDetails,
     #[doc = "The list of Hyper-V hosts associated with the fabric."]
-    #[serde(rename = "hyperVHosts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hyperVHosts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hyper_v_hosts: Vec<HyperVHostDetails>,
 }
 impl HyperVSiteDetails {
@@ -5762,7 +6044,12 @@ pub struct HyperVVirtualMachineDetails {
     #[serde(rename = "osDetails", default, skip_serializing_if = "Option::is_none")]
     pub os_details: Option<OsDetails>,
     #[doc = "The Last successful failover time."]
-    #[serde(rename = "diskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_details: Vec<DiskDetails>,
     #[doc = "A value indicating whether the VM has a physical disk attached. String value of SrsDataContract.PresenceStatus enum."]
     #[serde(rename = "hasPhysicalDisk", default, skip_serializing_if = "Option::is_none")]
@@ -5934,7 +6221,12 @@ pub struct IpConfigDetails {
     pub recovery_ip_address_type: Option<String>,
     #[serde(rename = "recoveryPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_public_ip_address_id: Option<String>,
-    #[serde(rename = "recoveryLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_lb_backend_address_pool_ids: Vec<String>,
     #[serde(rename = "tfoSubnetName", default, skip_serializing_if = "Option::is_none")]
     pub tfo_subnet_name: Option<String>,
@@ -5942,7 +6234,12 @@ pub struct IpConfigDetails {
     pub tfo_static_ip_address: Option<String>,
     #[serde(rename = "tfoPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub tfo_public_ip_address_id: Option<String>,
-    #[serde(rename = "tfoLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tfoLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tfo_lb_backend_address_pool_ids: Vec<String>,
 }
 impl IpConfigDetails {
@@ -5964,7 +6261,12 @@ pub struct IpConfigInputDetails {
     pub recovery_static_ip_address: Option<String>,
     #[serde(rename = "recoveryPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_public_ip_address_id: Option<String>,
-    #[serde(rename = "recoveryLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recoveryLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recovery_lb_backend_address_pool_ids: Vec<String>,
     #[serde(rename = "tfoSubnetName", default, skip_serializing_if = "Option::is_none")]
     pub tfo_subnet_name: Option<String>,
@@ -5972,7 +6274,12 @@ pub struct IpConfigInputDetails {
     pub tfo_static_ip_address: Option<String>,
     #[serde(rename = "tfoPublicIPAddressId", default, skip_serializing_if = "Option::is_none")]
     pub tfo_public_ip_address_id: Option<String>,
-    #[serde(rename = "tfoLBBackendAddressPoolIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tfoLBBackendAddressPoolIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tfo_lb_backend_address_pool_ids: Vec<String>,
 }
 impl IpConfigInputDetails {
@@ -6157,7 +6464,12 @@ pub struct InMageAzureV2EnableProtectionInput {
     #[serde(rename = "multiVmGroupName", default, skip_serializing_if = "Option::is_none")]
     pub multi_vm_group_name: Option<String>,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<InMageAzureV2DiskInputDetails>,
     #[doc = "The selected target Azure network Id."]
     #[serde(rename = "targetAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -6715,7 +7027,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "multiVmSyncStatus", default, skip_serializing_if = "Option::is_none")]
     pub multi_vm_sync_status: Option<String>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageAzureV2ProtectedDiskDetails>,
     #[doc = "A value indicating whether any disk is resized for this VM."]
     #[serde(rename = "diskResized", default, skip_serializing_if = "Option::is_none")]
@@ -6739,7 +7056,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "osDiskId", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_id: Option<String>,
     #[doc = "Azure VM Disk details."]
-    #[serde(rename = "azureVMDiskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureVMDiskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_vm_disk_details: Vec<AzureVmDiskDetails>,
     #[doc = "Recovery Azure given name."]
     #[serde(rename = "recoveryAzureVMName", default, skip_serializing_if = "Option::is_none")]
@@ -6754,7 +7076,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "recoveryAzureLogStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_azure_log_storage_account_id: Option<String>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "The selected recovery azure network Id."]
     #[serde(rename = "selectedRecoveryAzureNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -6772,7 +7099,11 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "enableRdpOnTargetOption", default, skip_serializing_if = "Option::is_none")]
     pub enable_rdp_on_target_option: Option<String>,
     #[doc = "The datastores of the on-premise machine. Value can be list of strings that contain datastore names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The ARM Id of the target Azure VM. This value will be null until the VM is failed over. Only after failure it will be populated with the ARM Id of the Azure VM."]
     #[serde(rename = "targetVmId", default, skip_serializing_if = "Option::is_none")]
@@ -6799,7 +7130,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "sqlServerLicenseType", default, skip_serializing_if = "Option::is_none")]
     pub sql_server_license_type: Option<String>,
     #[doc = "The validation errors of the on-premise machine Value can be list of validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
     #[doc = "The last RPO calculated time."]
     #[serde(rename = "lastRpoCalculatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -6814,7 +7150,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "osVersion", default, skip_serializing_if = "Option::is_none")]
     pub os_version: Option<String>,
     #[doc = "The list of protected managed disks."]
-    #[serde(rename = "protectedManagedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedManagedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_managed_disks: Vec<InMageAzureV2ManagedDiskDetails>,
     #[doc = "The last recovery point received time."]
     #[serde(rename = "lastRecoveryPointReceived", default, with = "azure_core::date::rfc3339::option")]
@@ -6847,7 +7188,12 @@ pub struct InMageAzureV2ReplicationDetails {
     #[serde(rename = "targetNicTags", default, skip_serializing_if = "Option::is_none")]
     pub target_nic_tags: Option<serde_json::Value>,
     #[doc = "The switch provider blocking error information."]
-    #[serde(rename = "switchProviderBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "switchProviderBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub switch_provider_blocking_error_details: Vec<InMageAzureV2SwitchProviderBlockingErrorDetails>,
     #[doc = "InMageAzureV2 switch provider details."]
     #[serde(rename = "switchProviderDetails", default, skip_serializing_if = "Option::is_none")]
@@ -6951,7 +7297,12 @@ pub struct InMageAzureV2ReprotectInput {
     #[serde(rename = "logStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub log_storage_account_id: Option<String>,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
 }
 impl InMageAzureV2ReprotectInput {
@@ -7113,7 +7464,12 @@ pub struct InMageAzureV2UpdateReplicationProtectedItemInput {
     #[serde(rename = "sqlServerLicenseType", default, skip_serializing_if = "Option::is_none")]
     pub sql_server_license_type: Option<in_mage_azure_v2_update_replication_protected_item_input::SqlServerLicenseType>,
     #[doc = "The list of disk update properties."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<UpdateDiskInput>,
 }
 impl InMageAzureV2UpdateReplicationProtectedItemInput {
@@ -7244,7 +7600,12 @@ pub struct InMageDiskDetails {
     #[serde(rename = "diskConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub disk_configuration: Option<String>,
     #[doc = "Volumes of the disk."]
-    #[serde(rename = "volumeList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_list: Vec<DiskVolumeDetails>,
 }
 impl InMageDiskDetails {
@@ -7256,10 +7617,20 @@ impl InMageDiskDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InMageDiskExclusionInput {
     #[doc = "The volume label based option for disk exclusion."]
-    #[serde(rename = "volumeOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_options: Vec<InMageVolumeExclusionOptions>,
     #[doc = "The guest disk signature based option for disk exclusion."]
-    #[serde(rename = "diskSignatureOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskSignatureOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_signature_options: Vec<InMageDiskSignatureExclusionOptions>,
 }
 impl InMageDiskExclusionInput {
@@ -7312,7 +7683,12 @@ pub struct InMageEnableProtectionInput {
     #[serde(rename = "diskExclusionInput", default, skip_serializing_if = "Option::is_none")]
     pub disk_exclusion_input: Option<InMageDiskExclusionInput>,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
 }
 impl InMageEnableProtectionInput {
@@ -7603,7 +7979,12 @@ pub struct InMageRcmApplianceDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub dra: Option<DraDetails>,
     #[doc = "The switch provider blocking error information."]
-    #[serde(rename = "switchProviderBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "switchProviderBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub switch_provider_blocking_error_details: Vec<InMageRcmFabricSwitchProviderBlockingErrorDetails>,
 }
 impl InMageRcmApplianceDetails {
@@ -7617,7 +7998,11 @@ pub struct InMageRcmApplianceSpecificDetails {
     #[serde(flatten)]
     pub appliance_specific_details: ApplianceSpecificDetails,
     #[doc = "The list of appliances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub appliances: Vec<InMageRcmApplianceDetails>,
 }
 impl InMageRcmApplianceSpecificDetails {
@@ -7655,10 +8040,19 @@ pub struct InMageRcmDiscoveredProtectedVmDetails {
     #[serde(rename = "vCenterFqdn", default, skip_serializing_if = "Option::is_none")]
     pub v_center_fqdn: Option<String>,
     #[doc = "The list of datastores."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The list of IP addresses."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "The VMware tools status."]
     #[serde(rename = "vmwareToolsStatus", default, skip_serializing_if = "Option::is_none")]
@@ -7837,7 +8231,12 @@ pub struct InMageRcmEnableProtectionInput {
     #[serde(rename = "fabricDiscoveryMachineId")]
     pub fabric_discovery_machine_id: String,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<InMageRcmDiskInput>,
     #[doc = "InMageRcm disk input."]
     #[serde(rename = "disksDefault", default, skip_serializing_if = "Option::is_none")]
@@ -8065,28 +8464,67 @@ pub struct InMageRcmFabricSpecificDetails {
     #[serde(rename = "sourceAgentIdentityDetails", default, skip_serializing_if = "Option::is_none")]
     pub source_agent_identity_details: Option<IdentityProviderDetails>,
     #[doc = "The list of process servers."]
-    #[serde(rename = "processServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "processServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub process_servers: Vec<ProcessServerDetails>,
     #[doc = "The list of RCM proxies."]
-    #[serde(rename = "rcmProxies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rcmProxies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rcm_proxies: Vec<RcmProxyDetails>,
     #[doc = "The list of push installers."]
-    #[serde(rename = "pushInstallers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pushInstallers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub push_installers: Vec<PushInstallerDetails>,
     #[doc = "The list of replication agents."]
-    #[serde(rename = "replicationAgents", default, skip_serializing_if = "Vec::is_empty")]
-    pub replication_agents: Vec<ReplicationAgentDetails>,
+    #[serde(
+        rename = "replicationAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
+    pub replication_agents: Vec<ReplicationAgentDetails>,
     #[doc = "The list of reprotect agents."]
-    #[serde(rename = "reprotectAgents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reprotectAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reprotect_agents: Vec<ReprotectAgentDetails>,
     #[doc = "The list of Mars agents."]
-    #[serde(rename = "marsAgents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "marsAgents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mars_agents: Vec<MarsAgentDetails>,
     #[doc = "The list of DRAs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dras: Vec<DraDetails>,
     #[doc = "The list of agent details."]
-    #[serde(rename = "agentDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_details: Vec<AgentDetails>,
 }
 impl InMageRcmFabricSpecificDetails {
@@ -8149,10 +8587,19 @@ pub struct InMageRcmFailbackDiscoveredProtectedVmDetails {
     #[serde(rename = "vCenterFqdn", default, skip_serializing_if = "Option::is_none")]
     pub v_center_fqdn: Option<String>,
     #[doc = "The list of datastores."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The list of IP addresses."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "The VMware tools status."]
     #[serde(rename = "vmwareToolsStatus", default, skip_serializing_if = "Option::is_none")]
@@ -8242,7 +8689,12 @@ pub struct InMageRcmFailbackMobilityAgentDetails {
     #[serde(rename = "lastHeartbeatUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_heartbeat_utc: Option<time::OffsetDateTime>,
     #[doc = "The whether update is possible or not."]
-    #[serde(rename = "reasonsBlockingUpgrade", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reasonsBlockingUpgrade",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons_blocking_upgrade: Vec<String>,
     #[doc = "A value indicating whether agent is upgradeable or not."]
     #[serde(rename = "isUpgradeable", default, skip_serializing_if = "Option::is_none")]
@@ -8484,13 +8936,23 @@ pub struct InMageRcmFailbackReplicationDetails {
     #[serde(rename = "resyncState", default, skip_serializing_if = "Option::is_none")]
     pub resync_state: Option<in_mage_rcm_failback_replication_details::ResyncState>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageRcmFailbackProtectedDiskDetails>,
     #[doc = "InMageRcmFailback mobility agent details."]
     #[serde(rename = "mobilityAgentDetails", default, skip_serializing_if = "Option::is_none")]
     pub mobility_agent_details: Option<InMageRcmFailbackMobilityAgentDetails>,
     #[doc = "The network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<InMageRcmFailbackNicDetails>,
     #[doc = "The last planned failover start time."]
     #[serde(rename = "lastPlannedFailoverStartTime", default, with = "azure_core::date::rfc3339::option")]
@@ -8881,7 +9343,12 @@ pub struct InMageRcmMobilityAgentDetails {
     #[serde(rename = "lastHeartbeatUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_heartbeat_utc: Option<time::OffsetDateTime>,
     #[doc = "The whether update is possible or not."]
-    #[serde(rename = "reasonsBlockingUpgrade", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reasonsBlockingUpgrade",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons_blocking_upgrade: Vec<String>,
     #[doc = "A value indicating whether agent is upgradeable or not."]
     #[serde(rename = "isUpgradeable", default, skip_serializing_if = "Option::is_none")]
@@ -9421,7 +9888,12 @@ pub struct InMageRcmReplicationDetails {
     #[serde(rename = "agentUpgradeAttemptToVersion", default, skip_serializing_if = "Option::is_none")]
     pub agent_upgrade_attempt_to_version: Option<String>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageRcmProtectedDiskDetails>,
     #[doc = "A value indicating whether last agent upgrade was successful or not."]
     #[serde(rename = "isLastUpgradeSuccessful", default, skip_serializing_if = "Option::is_none")]
@@ -9437,13 +9909,28 @@ pub struct InMageRcmReplicationDetails {
     #[serde(rename = "mobilityAgentDetails", default, skip_serializing_if = "Option::is_none")]
     pub mobility_agent_details: Option<InMageRcmMobilityAgentDetails>,
     #[doc = "The last agent upgrade error information."]
-    #[serde(rename = "lastAgentUpgradeErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "lastAgentUpgradeErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub last_agent_upgrade_error_details: Vec<InMageRcmLastAgentUpgradeErrorDetails>,
     #[doc = "The agent upgrade blocking error information."]
-    #[serde(rename = "agentUpgradeBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agentUpgradeBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agent_upgrade_blocking_error_details: Vec<InMageRcmAgentUpgradeBlockingErrorDetails>,
     #[doc = "The network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<InMageRcmNicDetails>,
     #[doc = "InMageRcm discovered protected VM details."]
     #[serde(rename = "discoveredVmDetails", default, skip_serializing_if = "Option::is_none")]
@@ -9903,7 +10390,12 @@ pub struct InMageRcmUpdateReplicationProtectedItemInput {
     #[serde(rename = "testNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub test_network_id: Option<String>,
     #[doc = "The list of NIC details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<InMageRcmNicInput>,
     #[doc = "The license type."]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -10017,7 +10509,12 @@ pub struct InMageReplicationDetails {
     #[serde(rename = "rpoInSeconds", default, skip_serializing_if = "Option::is_none")]
     pub rpo_in_seconds: Option<i64>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<InMageProtectedDiskDetails>,
     #[doc = "The source IP address."]
     #[serde(rename = "ipAddress", default, skip_serializing_if = "Option::is_none")]
@@ -10059,7 +10556,12 @@ pub struct InMageReplicationDetails {
     #[serde(rename = "infrastructureVmId", default, skip_serializing_if = "Option::is_none")]
     pub infrastructure_vm_id: Option<String>,
     #[doc = "The PE Network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicDetails>,
     #[doc = "A value indicating the discovery type of the machine."]
     #[serde(rename = "discoveryType", default, skip_serializing_if = "Option::is_none")]
@@ -10068,10 +10570,19 @@ pub struct InMageReplicationDetails {
     #[serde(rename = "azureStorageAccountId", default, skip_serializing_if = "Option::is_none")]
     pub azure_storage_account_id: Option<String>,
     #[doc = "The datastores of the on-premise machine Value can be list of strings that contain datastore names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub datastores: Vec<String>,
     #[doc = "The validation errors of the on-premise machine Value can be list of validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
     #[doc = "The last RPO calculated time."]
     #[serde(rename = "lastRpoCalculatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -10169,7 +10680,12 @@ pub struct InMageReprotectInput {
     #[serde(rename = "profileId")]
     pub profile_id: String,
     #[doc = "The disks to include list."]
-    #[serde(rename = "disksToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disksToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks_to_include: Vec<String>,
 }
 impl InMageReprotectInput {
@@ -10344,10 +10860,19 @@ pub struct InconsistentVmDetails {
     #[serde(rename = "cloudName", default, skip_serializing_if = "Option::is_none")]
     pub cloud_name: Option<String>,
     #[doc = "The list of details regarding state of the Protected Entity in SRS and On prem."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<String>,
     #[doc = "The list of error ids."]
-    #[serde(rename = "errorIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_ids: Vec<String>,
 }
 impl InconsistentVmDetails {
@@ -10376,7 +10901,12 @@ pub struct InlineWorkflowTaskDetails {
     #[serde(flatten)]
     pub group_task_details: GroupTaskDetails,
     #[doc = "The list of child workflow ids."]
-    #[serde(rename = "workflowIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "workflowIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub workflow_ids: Vec<String>,
 }
 impl InlineWorkflowTaskDetails {
@@ -10512,7 +11042,11 @@ impl Job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCollection {
     #[doc = "The list of jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10617,10 +11151,18 @@ pub struct JobProperties {
     #[serde(rename = "stateDescription", default, skip_serializing_if = "Option::is_none")]
     pub state_description: Option<String>,
     #[doc = "The tasks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tasks: Vec<AsrTask>,
     #[doc = "The errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<JobErrorDetails>,
     #[doc = "The start time."]
     #[serde(rename = "startTime", default, with = "azure_core::date::rfc3339::option")]
@@ -10629,7 +11171,12 @@ pub struct JobProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The Allowed action the job."]
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
     #[doc = "The affected Object Id."]
     #[serde(rename = "targetObjectId", default, skip_serializing_if = "Option::is_none")]
@@ -10803,7 +11350,11 @@ impl LogicalNetwork {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogicalNetworkCollection {
     #[doc = "The Logical Networks list details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogicalNetwork>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10894,7 +11445,12 @@ pub struct MarsAgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<mars_agent_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl MarsAgentDetails {
@@ -10971,16 +11527,36 @@ pub struct MasterTargetServer {
     #[serde(rename = "versionStatus", default, skip_serializing_if = "Option::is_none")]
     pub version_status: Option<String>,
     #[doc = "The retention volumes of Master target Server."]
-    #[serde(rename = "retentionVolumes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retentionVolumes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retention_volumes: Vec<RetentionVolume>,
     #[doc = "The list of data stores in the fabric."]
-    #[serde(rename = "dataStores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataStores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_stores: Vec<DataStore>,
     #[doc = "Validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
     #[doc = "Health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "Disk count of the master target."]
     #[serde(rename = "diskCount", default, skip_serializing_if = "Option::is_none")]
@@ -11062,7 +11638,11 @@ impl MigrationItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationItemCollection {
     #[doc = "The list of migration items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrationItem>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11125,16 +11705,31 @@ pub struct MigrationItemProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<migration_item_properties::Health>,
     #[doc = "The list of health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The allowed operations on the migration item based on the current migration state of the item."]
-    #[serde(rename = "allowedOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_operations: Vec<String>,
     #[doc = "Current job details of the migration item."]
     #[serde(rename = "currentJob", default, skip_serializing_if = "Option::is_none")]
     pub current_job: Option<CurrentJobDetails>,
     #[doc = "The critical past job details."]
-    #[serde(rename = "criticalJobHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "criticalJobHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub critical_job_history: Vec<CriticalJobHistoryDetails>,
     #[doc = "The correlation Id for events associated with this migration item."]
     #[serde(rename = "eventCorrelationId", default, skip_serializing_if = "Option::is_none")]
@@ -11364,7 +11959,11 @@ impl MigrationRecoveryPoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationRecoveryPointCollection {
     #[doc = "The migration recovery point details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrationRecoveryPoint>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11474,7 +12073,11 @@ impl Network {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkCollection {
     #[doc = "The Networks list details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Network>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11509,7 +12112,11 @@ impl NetworkMapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkMappingCollection {
     #[doc = "The Network Mappings list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkMapping>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11581,7 +12188,11 @@ pub struct NetworkProperties {
     #[serde(rename = "fabricType", default, skip_serializing_if = "Option::is_none")]
     pub fabric_type: Option<String>,
     #[doc = "The List of subnets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<Subnet>,
     #[doc = "The Friendly Name."]
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
@@ -11782,7 +12393,11 @@ impl OperationsDiscovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsDiscoveryCollection {
     #[doc = "The ClientDiscovery details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDiscovery>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11887,7 +12502,11 @@ impl Policy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyCollection {
     #[doc = "The policy details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Policy>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11968,7 +12587,12 @@ pub struct ProcessServer {
     #[serde(rename = "versionStatus", default, skip_serializing_if = "Option::is_none")]
     pub version_status: Option<String>,
     #[doc = "The list of the mobility service updates available on the Process Server."]
-    #[serde(rename = "mobilityServiceUpdates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mobilityServiceUpdates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mobility_service_updates: Vec<MobilityServiceUpdate>,
     #[doc = "The agent generated Id."]
     #[serde(rename = "hostId", default, skip_serializing_if = "Option::is_none")]
@@ -12022,7 +12646,12 @@ pub struct ProcessServer {
     #[serde(rename = "osVersion", default, skip_serializing_if = "Option::is_none")]
     pub os_version: Option<String>,
     #[doc = "Health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "Agent expiry date."]
     #[serde(rename = "agentExpiryDate", default, with = "azure_core::date::rfc3339::option")]
@@ -12123,7 +12752,12 @@ pub struct ProcessServerDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub fqdn: Option<String>,
     #[doc = "The list of IP addresses for communicating with the RCM component."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "The version."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -12186,7 +12820,12 @@ pub struct ProcessServerDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<process_server_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The protected item count."]
     #[serde(rename = "protectedItemCount", default, skip_serializing_if = "Option::is_none")]
@@ -12508,7 +13147,11 @@ impl ProtectableItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProtectableItemCollection {
     #[doc = "The Protectable item details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectableItem>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12541,10 +13184,20 @@ pub struct ProtectableItemProperties {
     #[serde(rename = "recoveryServicesProviderId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_services_provider_id: Option<String>,
     #[doc = "The Current protection readiness errors."]
-    #[serde(rename = "protectionReadinessErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectionReadinessErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protection_readiness_errors: Vec<String>,
     #[doc = "The list of replication providers supported for the protectable item."]
-    #[serde(rename = "supportedReplicationProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedReplicationProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_replication_providers: Vec<String>,
     #[doc = "Replication provider specific settings."]
     #[serde(rename = "customDetails", default, skip_serializing_if = "Option::is_none")]
@@ -12658,7 +13311,11 @@ impl ProtectionContainer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProtectionContainerCollection {
     #[doc = "The Protection Container details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionContainer>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12705,7 +13362,11 @@ impl ProtectionContainerMapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProtectionContainerMappingCollection {
     #[doc = "List of container mappings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProtectionContainerMapping>,
     #[doc = "Link to fetch rest of the data."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12738,7 +13399,12 @@ pub struct ProtectionContainerMappingProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<String>,
     #[doc = "Health error."]
-    #[serde(rename = "healthErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_error_details: Vec<HealthError>,
     #[doc = "Policy ARM Id."]
     #[serde(rename = "policyId", default, skip_serializing_if = "Option::is_none")]
@@ -12882,7 +13548,12 @@ pub struct PushInstallerDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<push_installer_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl PushInstallerDetails {
@@ -12965,7 +13636,12 @@ pub struct RcmProxyDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<rcm_proxy_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl RcmProxyDetails {
@@ -13321,7 +13997,11 @@ pub mod recovery_plan_automation_runbook_action_details {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoveryPlanCollection {
     #[doc = "The list of recovery plans."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryPlan>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13345,13 +14025,28 @@ pub struct RecoveryPlanGroup {
     #[serde(rename = "groupType")]
     pub group_type: recovery_plan_group::GroupType,
     #[doc = "The list of protected items."]
-    #[serde(rename = "replicationProtectedItems", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replicationProtectedItems",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replication_protected_items: Vec<RecoveryPlanProtectedItem>,
     #[doc = "The start group actions."]
-    #[serde(rename = "startGroupActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "startGroupActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub start_group_actions: Vec<RecoveryPlanAction>,
     #[doc = "The end group actions."]
-    #[serde(rename = "endGroupActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endGroupActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub end_group_actions: Vec<RecoveryPlanAction>,
 }
 impl RecoveryPlanGroup {
@@ -13903,7 +14598,12 @@ pub struct RecoveryPlanPlannedFailoverInputProperties {
     #[serde(rename = "failoverDirection")]
     pub failover_direction: recovery_plan_planned_failover_input_properties::FailoverDirection,
     #[doc = "The provider specific properties."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificFailoverInput>,
 }
 impl RecoveryPlanPlannedFailoverInputProperties {
@@ -13976,10 +14676,20 @@ pub struct RecoveryPlanProperties {
     #[serde(rename = "failoverDeploymentModel", default, skip_serializing_if = "Option::is_none")]
     pub failover_deployment_model: Option<String>,
     #[doc = "The list of replication providers."]
-    #[serde(rename = "replicationProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replicationProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replication_providers: Vec<String>,
     #[doc = "The list of allowed operations."]
-    #[serde(rename = "allowedOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_operations: Vec<String>,
     #[doc = "The start time of the last planned failover."]
     #[serde(rename = "lastPlannedFailoverTime", default, with = "azure_core::date::rfc3339::option")]
@@ -14000,10 +14710,19 @@ pub struct RecoveryPlanProperties {
     #[serde(rename = "currentScenarioStatusDescription", default, skip_serializing_if = "Option::is_none")]
     pub current_scenario_status_description: Option<String>,
     #[doc = "The recovery plan groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<RecoveryPlanGroup>,
     #[doc = "The provider id and provider specific details."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificDetails>,
 }
 impl RecoveryPlanProperties {
@@ -14190,7 +14909,12 @@ pub struct RecoveryPlanTestFailoverInputProperties {
     #[serde(rename = "networkId", default, skip_serializing_if = "Option::is_none")]
     pub network_id: Option<String>,
     #[doc = "The provider specific properties."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificFailoverInput>,
 }
 impl RecoveryPlanTestFailoverInputProperties {
@@ -14264,7 +14988,12 @@ pub struct RecoveryPlanUnplannedFailoverInputProperties {
     #[serde(rename = "sourceSiteOperations")]
     pub source_site_operations: recovery_plan_unplanned_failover_input_properties::SourceSiteOperations,
     #[doc = "The provider specific properties."]
-    #[serde(rename = "providerSpecificDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "providerSpecificDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provider_specific_details: Vec<RecoveryPlanProviderSpecificFailoverInput>,
 }
 impl RecoveryPlanUnplannedFailoverInputProperties {
@@ -14374,7 +15103,11 @@ impl RecoveryPoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoveryPointCollection {
     #[doc = "The recovery point details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryPoint>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14451,7 +15184,11 @@ impl RecoveryServicesProvider {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoveryServicesProviderCollection {
     #[doc = "The Servers details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoveryServicesProvider>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14502,10 +15239,20 @@ pub struct RecoveryServicesProviderProperties {
     #[serde(rename = "protectedItemCount", default, skip_serializing_if = "Option::is_none")]
     pub protected_item_count: Option<i32>,
     #[doc = "The scenarios allowed on this provider."]
-    #[serde(rename = "allowedScenarios", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedScenarios",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_scenarios: Vec<String>,
     #[doc = "The recovery services provider health error details."]
-    #[serde(rename = "healthErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_error_details: Vec<HealthError>,
     #[doc = "The DRA Id."]
     #[serde(rename = "draIdentifier", default, skip_serializing_if = "Option::is_none")]
@@ -14665,7 +15412,12 @@ pub struct ReplicationAgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<replication_agent_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl ReplicationAgentDetails {
@@ -14766,7 +15518,11 @@ impl ReplicationEligibilityResults {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationEligibilityResultsCollection {
     #[doc = "The replication eligibility results details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationEligibilityResults>,
 }
 impl ReplicationEligibilityResultsCollection {
@@ -14805,7 +15561,11 @@ pub struct ReplicationEligibilityResultsProperties {
     #[serde(rename = "clientRequestId", default, skip_serializing_if = "Option::is_none")]
     pub client_request_id: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ReplicationEligibilityResultsErrorInfo>,
 }
 impl ReplicationEligibilityResultsProperties {
@@ -14842,7 +15602,11 @@ impl ReplicationProtectedItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationProtectedItemCollection {
     #[doc = "The Replication protected item details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationProtectedItem>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14922,7 +15686,12 @@ pub struct ReplicationProtectedItemProperties {
     #[serde(rename = "switchProviderStateDescription", default, skip_serializing_if = "Option::is_none")]
     pub switch_provider_state_description: Option<String>,
     #[doc = "The allowed operations on the Replication protected item."]
-    #[serde(rename = "allowedOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_operations: Vec<String>,
     #[doc = "The consolidated protection health for the VM taking any issues with SRS as well as all the replication units associated with the VM's replication group into account. This is a string representation of the ProtectionHealth enumeration."]
     #[serde(rename = "replicationHealth", default, skip_serializing_if = "Option::is_none")]
@@ -14931,7 +15700,12 @@ pub struct ReplicationProtectedItemProperties {
     #[serde(rename = "failoverHealth", default, skip_serializing_if = "Option::is_none")]
     pub failover_health: Option<String>,
     #[doc = "List of health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The ID of Policy governing this PE."]
     #[serde(rename = "policyId", default, skip_serializing_if = "Option::is_none")]
@@ -14984,7 +15758,11 @@ impl ReplicationProtectionIntent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationProtectionIntentCollection {
     #[doc = "The Replication protection intent details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationProtectionIntent>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15128,13 +15906,23 @@ pub struct ReprotectAgentDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub health: Option<reprotect_agent_details::Health>,
     #[doc = "The health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
     #[doc = "The protected item count."]
     #[serde(rename = "protectedItemCount", default, skip_serializing_if = "Option::is_none")]
     pub protected_item_count: Option<i32>,
     #[doc = "The list of accessible datastores fetched from discovery."]
-    #[serde(rename = "accessibleDatastores", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessibleDatastores",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accessible_datastores: Vec<String>,
     #[doc = "The Vcenter Id."]
     #[serde(rename = "vcenterId", default, skip_serializing_if = "Option::is_none")]
@@ -15220,7 +16008,12 @@ impl ResolveHealthInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResolveHealthInputProperties {
     #[doc = "Health errors."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<ResolveHealthError>,
 }
 impl ResolveHealthInputProperties {
@@ -15256,7 +16049,11 @@ pub struct ResourceHealthSummary {
     #[serde(rename = "resourceCount", default, skip_serializing_if = "Option::is_none")]
     pub resource_count: Option<i32>,
     #[doc = "The list of summary of health errors across the resources under the container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issues: Vec<HealthErrorSummary>,
     #[doc = "The categorized resource counts."]
     #[serde(rename = "categorizedResourceCounts", default, skip_serializing_if = "Option::is_none")]
@@ -15543,7 +16340,11 @@ impl StorageClassification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageClassificationCollection {
     #[doc = "The storage details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageClassification>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15578,7 +16379,11 @@ impl StorageClassificationMapping {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageClassificationMappingCollection {
     #[doc = "The storage details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageClassificationMapping>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15653,7 +16458,12 @@ pub struct Subnet {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "The list of addresses for the subnet."]
-    #[serde(rename = "addressList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_list: Vec<String>,
 }
 impl Subnet {
@@ -15671,7 +16481,12 @@ pub struct SupportedOsDetails {
     #[serde(rename = "osType", default, skip_serializing_if = "Option::is_none")]
     pub os_type: Option<String>,
     #[doc = "The list of version for operating system."]
-    #[serde(rename = "osVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "osVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub os_versions: Vec<OsVersionWrapper>,
 }
 impl SupportedOsDetails {
@@ -15683,7 +16498,12 @@ impl SupportedOsDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedOsProperties {
     #[doc = "The supported operating systems property list."]
-    #[serde(rename = "supportedOsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_os_list: Vec<SupportedOsProperty>,
 }
 impl SupportedOsProperties {
@@ -15698,7 +16518,12 @@ pub struct SupportedOsProperty {
     #[serde(rename = "instanceType", default, skip_serializing_if = "Option::is_none")]
     pub instance_type: Option<String>,
     #[doc = "The list of supported operating systems."]
-    #[serde(rename = "supportedOs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedOs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_os: Vec<SupportedOsDetails>,
 }
 impl SupportedOsProperty {
@@ -15840,7 +16665,11 @@ impl TargetComputeSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TargetComputeSizeCollection {
     #[doc = "The list of target compute sizes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TargetComputeSize>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15882,13 +16711,22 @@ pub struct TargetComputeSizeProperties {
     #[serde(rename = "maxNicsCount", default, skip_serializing_if = "Option::is_none")]
     pub max_nics_count: Option<i32>,
     #[doc = "The reasons why the target compute size is not applicable for the protected item."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ComputeSizeErrorDetails>,
     #[doc = "The value indicating whether the target compute size supports high Iops."]
     #[serde(rename = "highIopsSupported", default, skip_serializing_if = "Option::is_none")]
     pub high_iops_supported: Option<String>,
     #[doc = "The supported HyperV Generations."]
-    #[serde(rename = "hyperVGenerations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hyperVGenerations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hyper_v_generations: Vec<String>,
 }
 impl TargetComputeSizeProperties {
@@ -15984,7 +16822,12 @@ pub struct TestFailoverJobDetails {
     #[serde(rename = "networkType", default, skip_serializing_if = "Option::is_none")]
     pub network_type: Option<String>,
     #[doc = "The test VM details."]
-    #[serde(rename = "protectedItemDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedItemDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_item_details: Vec<FailoverReplicationProtectedItemDetails>,
 }
 impl TestFailoverJobDetails {
@@ -16327,7 +17170,11 @@ impl UpdateRecoveryPlanInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UpdateRecoveryPlanInputProperties {
     #[doc = "The recovery plan groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<RecoveryPlanGroup>,
 }
 impl UpdateRecoveryPlanInputProperties {
@@ -16369,7 +17216,12 @@ pub struct UpdateReplicationProtectedItemInputProperties {
     #[serde(rename = "enableRdpOnTargetOption", default, skip_serializing_if = "Option::is_none")]
     pub enable_rdp_on_target_option: Option<String>,
     #[doc = "The list of VM nic details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VmNicInputDetails>,
     #[doc = "License type."]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -16494,7 +17346,11 @@ impl VCenter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VCenterCollection {
     #[doc = "The vCenter details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VCenter>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16545,7 +17401,12 @@ pub struct VCenterProperties {
     #[serde(rename = "fabricArmResourceName", default, skip_serializing_if = "Option::is_none")]
     pub fabric_arm_resource_name: Option<String>,
     #[doc = "The health errors for this VCenter."]
-    #[serde(rename = "healthErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_errors: Vec<HealthError>,
 }
 impl VCenterProperties {
@@ -16572,7 +17433,12 @@ pub struct VmNicDetails {
     #[serde(rename = "recoveryVMNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub recovery_vm_network_id: Option<String>,
     #[doc = "The IP configurations of the NIC."]
-    #[serde(rename = "ipConfigs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configs: Vec<IpConfigDetails>,
     #[doc = "Selection type for failover."]
     #[serde(rename = "selectionType", default, skip_serializing_if = "Option::is_none")]
@@ -16626,7 +17492,12 @@ pub struct VmNicInputDetails {
     #[serde(rename = "nicId", default, skip_serializing_if = "Option::is_none")]
     pub nic_id: Option<String>,
     #[doc = "The IP configurations to be used by NIC during test failover and failover."]
-    #[serde(rename = "ipConfigs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configs: Vec<IpConfigInputDetails>,
     #[doc = "Selection type for failover."]
     #[serde(rename = "selectionType", default, skip_serializing_if = "Option::is_none")]
@@ -17091,7 +17962,12 @@ pub struct VMwareCbtMigrationDetails {
     #[serde(rename = "targetVmTags", default, skip_serializing_if = "Option::is_none")]
     pub target_vm_tags: Option<serde_json::Value>,
     #[doc = "The list of protected disks."]
-    #[serde(rename = "protectedDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "protectedDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub protected_disks: Vec<VMwareCbtProtectedDiskDetails>,
     #[doc = "The target network Id."]
     #[serde(rename = "targetNetworkId", default, skip_serializing_if = "Option::is_none")]
@@ -17100,7 +17976,12 @@ pub struct VMwareCbtMigrationDetails {
     #[serde(rename = "testNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub test_network_id: Option<String>,
     #[doc = "The network details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VMwareCbtNicDetails>,
     #[doc = "The tags for the target NICs."]
     #[serde(rename = "targetNicTags", default, skip_serializing_if = "Option::is_none")]
@@ -17655,7 +18536,12 @@ pub struct VMwareCbtTestMigrateInput {
     #[serde(rename = "networkId")]
     pub network_id: String,
     #[doc = "The list of NIC details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VMwareCbtNicInput>,
 }
 impl VMwareCbtTestMigrateInput {
@@ -17727,10 +18613,20 @@ pub struct VMwareCbtUpdateMigrationItemInput {
     #[serde(rename = "testNetworkId", default, skip_serializing_if = "Option::is_none")]
     pub test_network_id: Option<String>,
     #[doc = "The list of NIC details."]
-    #[serde(rename = "vmNics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmNics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_nics: Vec<VMwareCbtNicInput>,
     #[doc = "The list of disk update properties."]
-    #[serde(rename = "vmDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_disks: Vec<VMwareCbtUpdateDiskInput>,
     #[doc = "The license type."]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -17866,13 +18762,28 @@ pub struct VMwareDetails {
     #[serde(flatten)]
     pub fabric_specific_details: FabricSpecificDetails,
     #[doc = "The list of Process Servers associated with the fabric."]
-    #[serde(rename = "processServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "processServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub process_servers: Vec<ProcessServer>,
     #[doc = "The list of Master Target servers associated with the fabric."]
-    #[serde(rename = "masterTargetServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "masterTargetServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub master_target_servers: Vec<MasterTargetServer>,
     #[doc = "The list of run as accounts created on the server."]
-    #[serde(rename = "runAsAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "runAsAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub run_as_accounts: Vec<RunAsAccount>,
     #[doc = "The number of replication pairs configured in this CS."]
     #[serde(rename = "replicationPairCount", default, skip_serializing_if = "Option::is_none")]
@@ -17962,7 +18873,12 @@ pub struct VMwareDetails {
     #[serde(rename = "agentVersionDetails", default, skip_serializing_if = "Option::is_none")]
     pub agent_version_details: Option<VersionDetails>,
     #[doc = "The switch provider blocking error information."]
-    #[serde(rename = "switchProviderBlockingErrorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "switchProviderBlockingErrorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub switch_provider_blocking_error_details: Vec<InMageFabricSwitchProviderBlockingErrorDetails>,
 }
 impl VMwareDetails {
@@ -18054,7 +18970,12 @@ pub struct VMwareV2FabricSpecificDetails {
     #[serde(rename = "serviceContainerId", default, skip_serializing_if = "Option::is_none")]
     pub service_container_id: Option<String>,
     #[doc = "The list of process servers."]
-    #[serde(rename = "processServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "processServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub process_servers: Vec<ProcessServerDetails>,
 }
 impl VMwareV2FabricSpecificDetails {
@@ -18101,10 +19022,20 @@ pub struct VMwareVirtualMachineDetails {
     #[serde(rename = "discoveryType", default, skip_serializing_if = "Option::is_none")]
     pub discovery_type: Option<String>,
     #[doc = "The disk details."]
-    #[serde(rename = "diskDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_details: Vec<InMageDiskDetails>,
     #[doc = "The validation errors."]
-    #[serde(rename = "validationErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_errors: Vec<HealthError>,
 }
 impl VMwareVirtualMachineDetails {
@@ -18142,7 +19073,12 @@ impl VaultHealthDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultHealthProperties {
     #[doc = "The list of errors on the vault."]
-    #[serde(rename = "vaultErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vaultErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vault_errors: Vec<HealthError>,
     #[doc = "Base class to define the health summary of the resources contained under an Arm resource."]
     #[serde(rename = "protectedItemsHealth", default, skip_serializing_if = "Option::is_none")]
@@ -18177,7 +19113,11 @@ impl VaultSetting {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VaultSettingCollection {
     #[doc = "The list of vault setting."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VaultSetting>,
     #[doc = "The value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/redhatopenshift/src/package_2020_04_30/models.rs b/services/mgmt/redhatopenshift/src/package_2020_04_30/models.rs
index 0de224fe30..14606087c1 100644
--- a/services/mgmt/redhatopenshift/src/package_2020_04_30/models.rs
+++ b/services/mgmt/redhatopenshift/src/package_2020_04_30/models.rs
@@ -52,7 +52,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -198,7 +202,11 @@ impl OpenShiftClusterCredentials {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OpenShiftClusterList {
     #[doc = "The list of OpenShift clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OpenShiftCluster>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -237,13 +245,23 @@ pub struct OpenShiftClusterProperties {
     #[serde(rename = "masterProfile", default, skip_serializing_if = "Option::is_none")]
     pub master_profile: Option<MasterProfile>,
     #[doc = "The cluster worker profiles."]
-    #[serde(rename = "workerProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "workerProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub worker_profiles: Vec<WorkerProfile>,
     #[doc = "APIServerProfile represents an API server profile."]
     #[serde(rename = "apiserverProfile", default, skip_serializing_if = "Option::is_none")]
     pub apiserver_profile: Option<ApiServerProfile>,
     #[doc = "The cluster ingress profiles."]
-    #[serde(rename = "ingressProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ingressProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ingress_profiles: Vec<IngressProfile>,
 }
 impl OpenShiftClusterProperties {
@@ -288,7 +306,11 @@ impl Operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/redhatopenshift/src/package_2021_09_01_preview/models.rs b/services/mgmt/redhatopenshift/src/package_2021_09_01_preview/models.rs
index fa0410faac..6964c740e1 100644
--- a/services/mgmt/redhatopenshift/src/package_2021_09_01_preview/models.rs
+++ b/services/mgmt/redhatopenshift/src/package_2021_09_01_preview/models.rs
@@ -52,7 +52,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -260,7 +264,11 @@ impl OpenShiftClusterCredentials {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OpenShiftClusterList {
     #[doc = "The list of OpenShift clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OpenShiftCluster>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -299,13 +307,23 @@ pub struct OpenShiftClusterProperties {
     #[serde(rename = "masterProfile", default, skip_serializing_if = "Option::is_none")]
     pub master_profile: Option<MasterProfile>,
     #[doc = "The cluster worker profiles."]
-    #[serde(rename = "workerProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "workerProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub worker_profiles: Vec<WorkerProfile>,
     #[doc = "APIServerProfile represents an API server profile."]
     #[serde(rename = "apiserverProfile", default, skip_serializing_if = "Option::is_none")]
     pub apiserver_profile: Option<ApiServerProfile>,
     #[doc = "The cluster ingress profiles."]
-    #[serde(rename = "ingressProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ingressProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ingress_profiles: Vec<IngressProfile>,
 }
 impl OpenShiftClusterProperties {
@@ -353,7 +371,11 @@ impl Operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/redhatopenshift/src/package_2022_04_01/models.rs b/services/mgmt/redhatopenshift/src/package_2022_04_01/models.rs
index a04bc1940d..86c9a847fa 100644
--- a/services/mgmt/redhatopenshift/src/package_2022_04_01/models.rs
+++ b/services/mgmt/redhatopenshift/src/package_2022_04_01/models.rs
@@ -52,7 +52,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -297,7 +301,11 @@ impl OpenShiftClusterCredentials {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OpenShiftClusterList {
     #[doc = "The list of OpenShift clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OpenShiftCluster>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -336,13 +344,23 @@ pub struct OpenShiftClusterProperties {
     #[serde(rename = "masterProfile", default, skip_serializing_if = "Option::is_none")]
     pub master_profile: Option<MasterProfile>,
     #[doc = "The cluster worker profiles."]
-    #[serde(rename = "workerProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "workerProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub worker_profiles: Vec<WorkerProfile>,
     #[doc = "APIServerProfile represents an API server profile."]
     #[serde(rename = "apiserverProfile", default, skip_serializing_if = "Option::is_none")]
     pub apiserver_profile: Option<ApiServerProfile>,
     #[doc = "The cluster ingress profiles."]
-    #[serde(rename = "ingressProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ingressProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ingress_profiles: Vec<IngressProfile>,
 }
 impl OpenShiftClusterProperties {
@@ -390,7 +408,11 @@ impl Operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link used to get the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/redis/src/package_2019_07_preview/models.rs b/services/mgmt/redis/src/package_2019_07_preview/models.rs
index 9afcc58586..a804573958 100644
--- a/services/mgmt/redis/src/package_2019_07_preview/models.rs
+++ b/services/mgmt/redis/src/package_2019_07_preview/models.rs
@@ -55,7 +55,11 @@ impl ImportRdbParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationListResponse {
     #[doc = "List of all notifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UpgradeNotification>,
     #[doc = "Link for next set of notifications."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -109,7 +113,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -230,7 +238,11 @@ pub struct RedisCreateParameters {
     #[doc = "Properties supplied to Create Redis operation."]
     pub properties: RedisCreateProperties,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The geo-location where the resource lives"]
     pub location: String,
@@ -303,7 +315,11 @@ impl RedisFirewallRuleCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisFirewallRuleListResult {
     #[doc = "Results of the list firewall rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisFirewallRule>,
     #[doc = "Link for next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -464,7 +480,11 @@ impl RedisLinkedServerWithProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisLinkedServerWithPropertiesList {
     #[doc = "List of linked servers (with properties) of a Redis cache."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisLinkedServerWithProperties>,
     #[doc = "Link for next set."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -485,7 +505,11 @@ impl RedisLinkedServerWithPropertiesList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisListResult {
     #[doc = "List of Redis cache instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisResource>,
     #[doc = "Link for next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -522,7 +546,11 @@ impl RedisPatchSchedule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisPatchScheduleListResult {
     #[doc = "Results of the list patch schedules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisPatchSchedule>,
     #[doc = "Link for next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -563,10 +591,19 @@ pub struct RedisProperties {
     #[serde(rename = "accessKeys", default, skip_serializing_if = "Option::is_none")]
     pub access_keys: Option<RedisAccessKeys>,
     #[doc = "List of the linked servers associated with the cache"]
-    #[serde(rename = "linkedServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_servers: Vec<RedisLinkedServer>,
     #[doc = "List of the Redis instances associated with the cache"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<RedisInstanceDetails>,
 }
 impl RedisProperties {
@@ -654,7 +691,11 @@ pub struct RedisRebootParameters {
     #[serde(rename = "shardId", default, skip_serializing_if = "Option::is_none")]
     pub shard_id: Option<i32>,
     #[doc = "A list of redis instances to reboot, specified by per-instance SSL ports or non-SSL ports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<i64>,
 }
 impl RedisRebootParameters {
@@ -733,7 +774,11 @@ pub struct RedisResource {
     #[doc = "Properties of the redis cache."]
     pub properties: RedisProperties,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl RedisResource {
diff --git a/services/mgmt/redis/src/package_2020_06/models.rs b/services/mgmt/redis/src/package_2020_06/models.rs
index b258582bf5..81a5cfda04 100644
--- a/services/mgmt/redis/src/package_2020_06/models.rs
+++ b/services/mgmt/redis/src/package_2020_06/models.rs
@@ -45,10 +45,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -112,7 +121,11 @@ impl ImportRdbParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationListResponse {
     #[doc = "List of all notifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UpgradeNotification>,
     #[doc = "Link for next set of notifications."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -166,7 +179,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -213,7 +230,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -347,7 +368,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -368,10 +393,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -588,7 +623,11 @@ pub struct RedisCreateParameters {
     #[doc = "Properties supplied to Create Redis operation."]
     pub properties: RedisCreateProperties,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The geo-location where the resource lives"]
     pub location: String,
@@ -661,7 +700,11 @@ impl RedisFirewallRuleCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisFirewallRuleListResult {
     #[doc = "Results of the list firewall rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisFirewallRule>,
     #[doc = "Link for next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -822,7 +865,11 @@ impl RedisLinkedServerWithProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisLinkedServerWithPropertiesList {
     #[doc = "List of linked servers (with properties) of a Redis cache."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisLinkedServerWithProperties>,
     #[doc = "Link for next set."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -843,7 +890,11 @@ impl RedisLinkedServerWithPropertiesList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisListResult {
     #[doc = "List of Redis cache instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisResource>,
     #[doc = "Link for next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -880,7 +931,11 @@ impl RedisPatchSchedule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisPatchScheduleListResult {
     #[doc = "Results of the list patch schedules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisPatchSchedule>,
     #[doc = "Link for next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -921,13 +976,27 @@ pub struct RedisProperties {
     #[serde(rename = "accessKeys", default, skip_serializing_if = "Option::is_none")]
     pub access_keys: Option<RedisAccessKeys>,
     #[doc = "List of the linked servers associated with the cache"]
-    #[serde(rename = "linkedServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_servers: Vec<RedisLinkedServer>,
     #[doc = "List of the Redis instances associated with the cache"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<RedisInstanceDetails>,
     #[doc = "List of private endpoint connection associated with the specified redis cache"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl RedisProperties {
@@ -1016,7 +1085,11 @@ pub struct RedisRebootParameters {
     #[serde(rename = "shardId", default, skip_serializing_if = "Option::is_none")]
     pub shard_id: Option<i32>,
     #[doc = "A list of redis instances to reboot, specified by per-instance SSL ports or non-SSL ports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<i64>,
 }
 impl RedisRebootParameters {
@@ -1095,7 +1168,11 @@ pub struct RedisResource {
     #[doc = "Properties of the redis cache."]
     pub properties: RedisProperties,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl RedisResource {
diff --git a/services/mgmt/redis/src/package_2020_12/models.rs b/services/mgmt/redis/src/package_2020_12/models.rs
index 34f108f20a..e5babeeece 100644
--- a/services/mgmt/redis/src/package_2020_12/models.rs
+++ b/services/mgmt/redis/src/package_2020_12/models.rs
@@ -45,10 +45,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -112,7 +121,11 @@ impl ImportRdbParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationListResponse {
     #[doc = "List of all notifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UpgradeNotification>,
     #[doc = "Link for next set of notifications."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -172,7 +185,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -219,7 +236,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -353,7 +374,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -374,10 +399,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -609,7 +644,11 @@ pub struct RedisCreateParameters {
     #[doc = "Properties supplied to Create Redis operation."]
     pub properties: RedisCreateProperties,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The geo-location where the resource lives"]
     pub location: String,
@@ -682,7 +721,11 @@ impl RedisFirewallRuleCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisFirewallRuleListResult {
     #[doc = "Results of the list firewall rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisFirewallRule>,
     #[doc = "Link for next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -846,7 +889,11 @@ impl RedisLinkedServerWithProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisLinkedServerWithPropertiesList {
     #[doc = "List of linked servers (with properties) of a Redis cache."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisLinkedServerWithProperties>,
     #[doc = "Link for next set."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -867,7 +914,11 @@ impl RedisLinkedServerWithPropertiesList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisListResult {
     #[doc = "List of Redis cache instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisResource>,
     #[doc = "Link for next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -908,7 +959,11 @@ impl RedisPatchSchedule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisPatchScheduleListResult {
     #[doc = "Results of the list patch schedules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisPatchSchedule>,
     #[doc = "Link for next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -946,13 +1001,27 @@ pub struct RedisProperties {
     #[serde(rename = "accessKeys", default, skip_serializing_if = "Option::is_none")]
     pub access_keys: Option<RedisAccessKeys>,
     #[doc = "List of the linked servers associated with the cache"]
-    #[serde(rename = "linkedServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_servers: Vec<RedisLinkedServer>,
     #[doc = "List of the Redis instances associated with the cache"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<RedisInstanceDetails>,
     #[doc = "List of private endpoint connection associated with the specified redis cache"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl RedisProperties {
@@ -1040,7 +1109,11 @@ pub struct RedisRebootParameters {
     #[serde(rename = "shardId", default, skip_serializing_if = "Option::is_none")]
     pub shard_id: Option<i32>,
     #[doc = "A list of redis instances to reboot, specified by per-instance SSL ports or non-SSL ports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<i64>,
 }
 impl RedisRebootParameters {
@@ -1119,7 +1192,11 @@ pub struct RedisResource {
     #[doc = "Properties of the redis cache."]
     pub properties: RedisProperties,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl RedisResource {
diff --git a/services/mgmt/redis/src/package_2021_06/models.rs b/services/mgmt/redis/src/package_2021_06/models.rs
index 62b882d96a..b9c8d273d4 100644
--- a/services/mgmt/redis/src/package_2021_06/models.rs
+++ b/services/mgmt/redis/src/package_2021_06/models.rs
@@ -45,10 +45,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -182,7 +191,11 @@ impl Serialize for ManagedServiceIdentityType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationListResponse {
     #[doc = "List of all notifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UpgradeNotification>,
     #[doc = "Link for next set of notifications."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -242,7 +255,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -297,7 +314,11 @@ pub struct OperationStatusResult {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The operations list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<OperationStatusResult>,
     #[doc = "The error detail."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -347,7 +368,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -481,7 +506,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -502,10 +531,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -747,7 +786,11 @@ pub struct RedisCreateParameters {
     #[doc = "Properties supplied to Create Redis operation."]
     pub properties: RedisCreateProperties,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The geo-location where the resource lives"]
     pub location: String,
@@ -824,7 +867,11 @@ impl RedisFirewallRuleCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisFirewallRuleListResult {
     #[doc = "Results of the list firewall rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisFirewallRule>,
     #[doc = "Link for next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -988,7 +1035,11 @@ impl RedisLinkedServerWithProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisLinkedServerWithPropertiesList {
     #[doc = "List of linked servers (with properties) of a Redis cache."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisLinkedServerWithProperties>,
     #[doc = "Link for next set."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1009,7 +1060,11 @@ impl RedisLinkedServerWithPropertiesList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisListResult {
     #[doc = "List of Redis cache instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisResource>,
     #[doc = "Link for next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1050,7 +1105,11 @@ impl RedisPatchSchedule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisPatchScheduleListResult {
     #[doc = "Results of the list patch schedules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisPatchSchedule>,
     #[doc = "Link for next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1088,13 +1147,27 @@ pub struct RedisProperties {
     #[serde(rename = "accessKeys", default, skip_serializing_if = "Option::is_none")]
     pub access_keys: Option<RedisAccessKeys>,
     #[doc = "List of the linked servers associated with the cache"]
-    #[serde(rename = "linkedServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_servers: Vec<RedisLinkedServer>,
     #[doc = "List of the Redis instances associated with the cache"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<RedisInstanceDetails>,
     #[doc = "List of private endpoint connection associated with the specified redis cache"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl RedisProperties {
@@ -1182,7 +1255,11 @@ pub struct RedisRebootParameters {
     #[serde(rename = "shardId", default, skip_serializing_if = "Option::is_none")]
     pub shard_id: Option<i32>,
     #[doc = "A list of redis instances to reboot, specified by per-instance SSL ports or non-SSL ports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<i64>,
 }
 impl RedisRebootParameters {
@@ -1261,7 +1338,11 @@ pub struct RedisResource {
     #[doc = "Properties of the redis cache."]
     pub properties: RedisProperties,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Managed service identity (system assigned and/or user assigned identities)"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/redis/src/package_2022_05/models.rs b/services/mgmt/redis/src/package_2022_05/models.rs
index cab3648317..f2c252cf71 100644
--- a/services/mgmt/redis/src/package_2022_05/models.rs
+++ b/services/mgmt/redis/src/package_2022_05/models.rs
@@ -45,10 +45,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -193,7 +202,11 @@ impl Serialize for ManagedServiceIdentityType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationListResponse {
     #[doc = "List of all notifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UpgradeNotification>,
     #[doc = "Link for next set of notifications."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -253,7 +266,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -308,7 +325,11 @@ pub struct OperationStatusResult {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The operations list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<OperationStatusResult>,
     #[doc = "The error detail."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -358,7 +379,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -492,7 +517,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -513,10 +542,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -758,7 +797,11 @@ pub struct RedisCreateParameters {
     #[doc = "Properties supplied to Create Redis operation."]
     pub properties: RedisCreateProperties,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The geo-location where the resource lives"]
     pub location: String,
@@ -835,7 +878,11 @@ impl RedisFirewallRuleCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisFirewallRuleListResult {
     #[doc = "Results of the list firewall rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisFirewallRule>,
     #[doc = "Link for next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -999,7 +1046,11 @@ impl RedisLinkedServerWithProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisLinkedServerWithPropertiesList {
     #[doc = "List of linked servers (with properties) of a Redis cache."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisLinkedServerWithProperties>,
     #[doc = "Link for next set."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1020,7 +1071,11 @@ impl RedisLinkedServerWithPropertiesList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisListResult {
     #[doc = "List of Redis cache instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisResource>,
     #[doc = "Link for next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1061,7 +1116,11 @@ impl RedisPatchSchedule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RedisPatchScheduleListResult {
     #[doc = "Results of the list patch schedules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RedisPatchSchedule>,
     #[doc = "Link for next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1099,13 +1158,27 @@ pub struct RedisProperties {
     #[serde(rename = "accessKeys", default, skip_serializing_if = "Option::is_none")]
     pub access_keys: Option<RedisAccessKeys>,
     #[doc = "List of the linked servers associated with the cache"]
-    #[serde(rename = "linkedServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_servers: Vec<RedisLinkedServer>,
     #[doc = "List of the Redis instances associated with the cache"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<RedisInstanceDetails>,
     #[doc = "List of private endpoint connection associated with the specified redis cache"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl RedisProperties {
@@ -1193,7 +1266,11 @@ pub struct RedisRebootParameters {
     #[serde(rename = "shardId", default, skip_serializing_if = "Option::is_none")]
     pub shard_id: Option<i32>,
     #[doc = "A list of redis instances to reboot, specified by per-instance SSL ports or non-SSL ports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<i64>,
 }
 impl RedisRebootParameters {
@@ -1272,7 +1349,11 @@ pub struct RedisResource {
     #[doc = "Properties of the redis cache."]
     pub properties: RedisProperties,
     #[doc = "A list of availability zones denoting where the resource needs to come from."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Managed service identity (system assigned and/or user assigned identities)"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/redisenterprise/src/package_2020_10_01_preview/models.rs b/services/mgmt/redisenterprise/src/package_2020_10_01_preview/models.rs
index 2aa9832198..0fb1ace599 100644
--- a/services/mgmt/redisenterprise/src/package_2020_10_01_preview/models.rs
+++ b/services/mgmt/redisenterprise/src/package_2020_10_01_preview/models.rs
@@ -26,7 +26,11 @@ pub struct Cluster {
     #[doc = "SKU parameters supplied to the create RedisEnterprise operation."]
     pub sku: Sku,
     #[doc = "The zones where this cluster will be deployed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Properties of RedisEnterprise clusters, as opposed to general resource properties like location, tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -46,7 +50,11 @@ impl Cluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterList {
     #[doc = "List of clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "The URI to fetch the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -82,7 +90,12 @@ pub struct ClusterProperties {
     #[serde(rename = "redisVersion", default, skip_serializing_if = "Option::is_none")]
     pub redis_version: Option<String>,
     #[doc = "List of private endpoint connections associated with the specified RedisEnterprise cluster"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl ClusterProperties {
@@ -126,7 +139,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseList {
     #[doc = "List of databases"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "The URI to fetch the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -165,7 +182,11 @@ pub struct DatabaseProperties {
     #[serde(rename = "evictionPolicy", default, skip_serializing_if = "Option::is_none")]
     pub eviction_policy: Option<database_properties::EvictionPolicy>,
     #[doc = "Optional set of redis modules to enable in this database - modules can only be added at creation time."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub modules: Vec<Module>,
 }
 impl DatabaseProperties {
@@ -345,10 +366,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -548,7 +578,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -622,7 +656,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -756,7 +794,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -777,10 +819,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
diff --git a/services/mgmt/redisenterprise/src/package_2021_03/models.rs b/services/mgmt/redisenterprise/src/package_2021_03/models.rs
index 465569de6c..5a92f2551e 100644
--- a/services/mgmt/redisenterprise/src/package_2021_03/models.rs
+++ b/services/mgmt/redisenterprise/src/package_2021_03/models.rs
@@ -26,7 +26,11 @@ pub struct Cluster {
     #[doc = "SKU parameters supplied to the create RedisEnterprise operation."]
     pub sku: Sku,
     #[doc = "The Availability Zones where this cluster will be deployed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Properties of RedisEnterprise clusters, as opposed to general resource properties like location, tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -46,7 +50,11 @@ impl Cluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterList {
     #[doc = "List of clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "The URI to fetch the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -82,7 +90,12 @@ pub struct ClusterProperties {
     #[serde(rename = "redisVersion", default, skip_serializing_if = "Option::is_none")]
     pub redis_version: Option<String>,
     #[doc = "List of private endpoint connections associated with the specified RedisEnterprise cluster"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl ClusterProperties {
@@ -171,7 +184,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseList {
     #[doc = "List of databases"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "The URI to fetch the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -213,7 +230,11 @@ pub struct DatabaseProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub persistence: Option<Persistence>,
     #[doc = "Optional set of redis modules to enable in this database - modules can only be added at creation time."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub modules: Vec<Module>,
 }
 impl DatabaseProperties {
@@ -393,10 +414,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -596,7 +626,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -775,7 +809,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -909,7 +947,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -930,10 +972,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
diff --git a/services/mgmt/redisenterprise/src/package_2021_08/models.rs b/services/mgmt/redisenterprise/src/package_2021_08/models.rs
index 1ba1ca07fa..6f22162b47 100644
--- a/services/mgmt/redisenterprise/src/package_2021_08/models.rs
+++ b/services/mgmt/redisenterprise/src/package_2021_08/models.rs
@@ -26,7 +26,11 @@ pub struct Cluster {
     #[doc = "SKU parameters supplied to the create RedisEnterprise operation."]
     pub sku: Sku,
     #[doc = "The Availability Zones where this cluster will be deployed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Properties of RedisEnterprise clusters, as opposed to general resource properties like location, tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -46,7 +50,11 @@ impl Cluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterList {
     #[doc = "List of clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "The URI to fetch the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -82,7 +90,12 @@ pub struct ClusterProperties {
     #[serde(rename = "redisVersion", default, skip_serializing_if = "Option::is_none")]
     pub redis_version: Option<String>,
     #[doc = "List of private endpoint connections associated with the specified RedisEnterprise cluster"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl ClusterProperties {
@@ -171,7 +184,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseList {
     #[doc = "List of databases"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "The URI to fetch the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -213,7 +230,11 @@ pub struct DatabaseProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub persistence: Option<Persistence>,
     #[doc = "Optional set of redis modules to enable in this database - modules can only be added at creation time."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub modules: Vec<Module>,
 }
 impl DatabaseProperties {
@@ -393,10 +414,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -596,7 +626,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -775,7 +809,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -909,7 +947,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -930,10 +972,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
diff --git a/services/mgmt/redisenterprise/src/package_2022_01/models.rs b/services/mgmt/redisenterprise/src/package_2022_01/models.rs
index 557b7cb35d..3c627be0b9 100644
--- a/services/mgmt/redisenterprise/src/package_2022_01/models.rs
+++ b/services/mgmt/redisenterprise/src/package_2022_01/models.rs
@@ -26,7 +26,11 @@ pub struct Cluster {
     #[doc = "SKU parameters supplied to the create RedisEnterprise operation."]
     pub sku: Sku,
     #[doc = "The Availability Zones where this cluster will be deployed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Properties of RedisEnterprise clusters, as opposed to general resource properties like location, tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -46,7 +50,11 @@ impl Cluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterList {
     #[doc = "List of clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "The URI to fetch the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -82,7 +90,12 @@ pub struct ClusterProperties {
     #[serde(rename = "redisVersion", default, skip_serializing_if = "Option::is_none")]
     pub redis_version: Option<String>,
     #[doc = "List of private endpoint connections associated with the specified RedisEnterprise cluster"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl ClusterProperties {
@@ -171,7 +184,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseList {
     #[doc = "List of databases"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "The URI to fetch the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -213,7 +230,11 @@ pub struct DatabaseProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub persistence: Option<Persistence>,
     #[doc = "Optional set of redis modules to enable in this database - modules can only be added at creation time."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub modules: Vec<Module>,
     #[doc = "Optional set of properties to configure geo replication for this database."]
     #[serde(rename = "geoReplication", default, skip_serializing_if = "Option::is_none")]
@@ -362,7 +383,12 @@ pub mod database_properties {
         #[serde(rename = "groupNickname", default, skip_serializing_if = "Option::is_none")]
         pub group_nickname: Option<String>,
         #[doc = "List of database resources to link with this database"]
-        #[serde(rename = "linkedDatabases", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "linkedDatabases",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub linked_databases: Vec<LinkedDatabase>,
     }
     impl GeoReplication {
@@ -411,10 +437,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -686,7 +721,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -865,7 +904,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -999,7 +1042,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -1020,10 +1067,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
diff --git a/services/mgmt/redisenterprise/src/package_preview_2021_02/models.rs b/services/mgmt/redisenterprise/src/package_preview_2021_02/models.rs
index 8657bf9529..d12ec1fd10 100644
--- a/services/mgmt/redisenterprise/src/package_preview_2021_02/models.rs
+++ b/services/mgmt/redisenterprise/src/package_preview_2021_02/models.rs
@@ -26,7 +26,11 @@ pub struct Cluster {
     #[doc = "SKU parameters supplied to the create RedisEnterprise operation."]
     pub sku: Sku,
     #[doc = "The Availability Zones where this cluster will be deployed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Properties of RedisEnterprise clusters, as opposed to general resource properties like location, tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -46,7 +50,11 @@ impl Cluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterList {
     #[doc = "List of clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "The URI to fetch the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -82,7 +90,12 @@ pub struct ClusterProperties {
     #[serde(rename = "redisVersion", default, skip_serializing_if = "Option::is_none")]
     pub redis_version: Option<String>,
     #[doc = "List of private endpoint connections associated with the specified RedisEnterprise cluster"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl ClusterProperties {
@@ -171,7 +184,11 @@ impl Database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseList {
     #[doc = "List of databases"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "The URI to fetch the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -213,7 +230,11 @@ pub struct DatabaseProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub persistence: Option<Persistence>,
     #[doc = "Optional set of redis modules to enable in this database - modules can only be added at creation time."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub modules: Vec<Module>,
     #[doc = "Optional set of properties to configure geo replication for this database."]
     #[serde(rename = "geoReplication", default, skip_serializing_if = "Option::is_none")]
@@ -362,7 +383,12 @@ pub mod database_properties {
         #[serde(rename = "groupNickname", default, skip_serializing_if = "Option::is_none")]
         pub group_nickname: Option<String>,
         #[doc = "List of database resources to link with this database"]
-        #[serde(rename = "linkedDatabases", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "linkedDatabases",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub linked_databases: Vec<LinkedDatabase>,
     }
     impl GeoReplication {
@@ -411,10 +437,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -686,7 +721,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -865,7 +904,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -999,7 +1042,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -1020,10 +1067,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
diff --git a/services/mgmt/relay/src/package_2016_07/models.rs b/services/mgmt/relay/src/package_2016_07/models.rs
index aaca4f573c..ce2f6bd8e5 100644
--- a/services/mgmt/relay/src/package_2016_07/models.rs
+++ b/services/mgmt/relay/src/package_2016_07/models.rs
@@ -47,7 +47,11 @@ impl AuthorizationRuleKeys {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationRuleListResult {
     #[doc = "Result of the List AuthorizationRules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AuthorizationRule>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of AuthorizationRules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -143,7 +147,11 @@ impl HybridConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HybridConnectionListResult {
     #[doc = "Result of the List HybridConnection ."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HybridConnection>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of HybridConnection operation"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -224,7 +232,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of EventHub operations supported by the Microsoft.EventHub resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -318,7 +330,11 @@ impl RelayNamespace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RelayNamespaceListResult {
     #[doc = "Result of the List Namespace operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RelayNamespace>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Namespaces"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -599,7 +615,11 @@ pub mod wcf_relay_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WcfRelaysListResult {
     #[doc = "Result of the List WcfRelays ."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WcfRelay>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of WcfRelays operation"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/relay/src/package_2017_04/models.rs b/services/mgmt/relay/src/package_2017_04/models.rs
index 40146768df..fcd9dbf911 100644
--- a/services/mgmt/relay/src/package_2017_04/models.rs
+++ b/services/mgmt/relay/src/package_2017_04/models.rs
@@ -61,7 +61,11 @@ pub mod authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationRuleListResult {
     #[doc = "Result of the list authorization rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AuthorizationRule>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of authorization rules."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -173,7 +177,11 @@ pub mod hybrid_connection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HybridConnectionListResult {
     #[doc = "Result of the list hybrid connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HybridConnection>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list hybrid connection operation."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -230,7 +238,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Relay operations supported by resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -296,7 +308,11 @@ impl RelayNamespace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RelayNamespaceListResult {
     #[doc = "Result of the list namespace operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RelayNamespace>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of namespaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -517,7 +533,11 @@ pub mod wcf_relay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WcfRelaysListResult {
     #[doc = "Result of the list WCF relay operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WcfRelay>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of WCF relays."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/relay/src/package_2018_01_preview/models.rs b/services/mgmt/relay/src/package_2018_01_preview/models.rs
index c36daabad2..8483d34afe 100644
--- a/services/mgmt/relay/src/package_2018_01_preview/models.rs
+++ b/services/mgmt/relay/src/package_2018_01_preview/models.rs
@@ -129,7 +129,12 @@ pub mod network_rule_set {
         #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
         pub default_action: Option<properties::DefaultAction>,
         #[doc = "List of IpRules"]
-        #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_rules: Vec<NwRuleSetIpRules>,
     }
     impl Properties {
@@ -218,7 +223,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Relay operations supported by resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -298,7 +307,11 @@ impl PrivateEndpointConnectionItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -440,7 +453,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -461,10 +478,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required member names of private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -515,7 +542,11 @@ impl RelayNamespace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RelayNamespaceListResult {
     #[doc = "Result of the list namespace operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RelayNamespace>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of namespaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/relay/src/package_2021_11_01/models.rs b/services/mgmt/relay/src/package_2021_11_01/models.rs
index bece7f55e3..37dfa4b694 100644
--- a/services/mgmt/relay/src/package_2021_11_01/models.rs
+++ b/services/mgmt/relay/src/package_2021_11_01/models.rs
@@ -62,7 +62,11 @@ pub mod authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthorizationRuleListResult {
     #[doc = "Result of the list authorization rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AuthorizationRule>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of authorization rules."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -195,10 +199,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -272,7 +285,11 @@ pub mod hybrid_connection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HybridConnectionListResult {
     #[doc = "Result of the list hybrid connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HybridConnection>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list hybrid connection operation."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -368,7 +385,12 @@ pub mod network_rule_set {
         #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
         pub default_action: Option<properties::DefaultAction>,
         #[doc = "List of IpRules"]
-        #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_rules: Vec<NwRuleSetIpRules>,
     }
     impl Properties {
@@ -466,7 +488,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Relay operations supported by the Microsoft.EventHub resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -516,7 +542,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "A collection of private endpoint connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "A link for the next page of private endpoint connection resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -627,10 +657,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -642,7 +682,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "A link for the next page of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -758,7 +802,11 @@ impl RelayNamespace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RelayNamespaceListResult {
     #[doc = "Result of the list namespace operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RelayNamespace>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of namespaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -797,7 +845,12 @@ pub struct RelayNamespaceProperties {
     #[serde(rename = "metricId", default, skip_serializing_if = "Option::is_none")]
     pub metric_id: Option<String>,
     #[doc = "List of private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "This determines if traffic is allowed over public network. By default it is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -1124,7 +1177,11 @@ pub mod wcf_relay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WcfRelaysListResult {
     #[doc = "Result of the list WCF relay operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WcfRelay>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of WCF relays."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/reservations/src/package_2020_11_preview/models.rs b/services/mgmt/reservations/src/package_2020_11_preview/models.rs
index 77fed323f3..3d15ea38c4 100644
--- a/services/mgmt/reservations/src/package_2020_11_preview/models.rs
+++ b/services/mgmt/reservations/src/package_2020_11_preview/models.rs
@@ -17,7 +17,11 @@ impl Actions {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AppliedReservationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
     #[doc = "Url to get the next page of reservations"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -180,7 +184,11 @@ impl AvailableScopeRequest {
 #[doc = "Available scope request properties"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableScopeRequestProperties {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl AvailableScopeRequestProperties {
@@ -292,10 +300,20 @@ impl CalculateExchangeRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CalculateExchangeRequestProperties {
     #[doc = "List of reservations that are being purchased in this exchange."]
-    #[serde(rename = "reservationsToPurchase", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToPurchase",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_purchase: Vec<PurchaseRequest>,
     #[doc = "List of reservations that are being returned in this exchange."]
-    #[serde(rename = "reservationsToExchange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToExchange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_exchange: Vec<ReservationToReturn>,
 }
 impl CalculateExchangeRequestProperties {
@@ -316,10 +334,20 @@ pub struct CalculateExchangeResponseProperties {
     #[serde(rename = "purchasesTotal", default, skip_serializing_if = "Option::is_none")]
     pub purchases_total: Option<Price>,
     #[doc = "Details of the reservations being purchased"]
-    #[serde(rename = "reservationsToPurchase", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToPurchase",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_purchase: Vec<ReservationToPurchaseCalculateExchange>,
     #[doc = "Details of the reservations being returned"]
-    #[serde(rename = "reservationsToExchange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToExchange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_exchange: Vec<ReservationToExchange>,
     #[doc = "Exchange policy errors"]
     #[serde(rename = "policyResult", default, skip_serializing_if = "Option::is_none")]
@@ -360,7 +388,12 @@ pub struct CalculatePriceResponseProperties {
     #[doc = "Amount that Microsoft uses for record. Used during refund for calculating refund limit. Tax is not included."]
     #[serde(rename = "pricingCurrencyTotal", default, skip_serializing_if = "Option::is_none")]
     pub pricing_currency_total: Option<calculate_price_response_properties::PricingCurrencyTotal>,
-    #[serde(rename = "paymentSchedule", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "paymentSchedule",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub payment_schedule: Vec<PaymentDetail>,
 }
 impl CalculatePriceResponseProperties {
@@ -409,13 +442,30 @@ pub struct Catalog {
     #[serde(rename = "billingPlans", default, skip_serializing_if = "Option::is_none")]
     pub billing_plans: Option<serde_json::Value>,
     #[doc = "Available reservation terms for this resource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub terms: Vec<ReservationTerm>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "skuProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_properties: Vec<SkuProperty>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<SkuRestriction>,
 }
 impl Catalog {
@@ -440,7 +490,11 @@ pub struct ChangeDirectoryResponse {
     #[doc = "Change directory result for reservation order or reservation"]
     #[serde(rename = "reservationOrder", default, skip_serializing_if = "Option::is_none")]
     pub reservation_order: Option<ChangeDirectoryResult>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations: Vec<ChangeDirectoryResult>,
 }
 impl ChangeDirectoryResponse {
@@ -510,7 +564,11 @@ impl Serialize for ContactMethod {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CreateGenericQuotaRequestParameters {
     #[doc = "Quota change requests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimitBase>,
 }
 impl CreateGenericQuotaRequestParameters {
@@ -561,7 +619,12 @@ impl EmailAction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EmailActions {
     #[doc = "The list of email actions."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<EmailAction>,
 }
 impl EmailActions {
@@ -865,7 +928,12 @@ impl ExchangePolicyError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExchangePolicyErrors {
     #[doc = "Exchange Policy errors"]
-    #[serde(rename = "policyErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_errors: Vec<ExchangePolicyError>,
 }
 impl ExchangePolicyErrors {
@@ -910,10 +978,20 @@ pub struct ExchangeResponseProperties {
     #[serde(rename = "purchasesTotal", default, skip_serializing_if = "Option::is_none")]
     pub purchases_total: Option<Price>,
     #[doc = "Details of the reservations being purchased"]
-    #[serde(rename = "reservationsToPurchase", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToPurchase",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_purchase: Vec<ReservationToPurchaseExchange>,
     #[doc = "Details of the reservations being returned"]
-    #[serde(rename = "reservationsToExchange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToExchange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_exchange: Vec<ReservationToReturnForExchange>,
     #[doc = "Exchange policy errors"]
     #[serde(rename = "policyResult", default, skip_serializing_if = "Option::is_none")]
@@ -989,7 +1067,11 @@ impl Serialize for InstanceFlexibility {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MergeProperties {
     #[doc = "Format of the resource id should be /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sources: Vec<String>,
 }
 impl MergeProperties {
@@ -1025,7 +1107,11 @@ impl OperationDisplay {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResponse>,
     #[doc = "Url to get the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1328,7 +1414,11 @@ pub mod purchase_request_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaLimits {
     #[doc = "List of Quota limits."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimitBase>,
     #[doc = "The uri to fetch the next page of quota limits. When there are no more pages, this is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1349,7 +1439,11 @@ impl QuotaLimits {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaLimitsResponse {
     #[doc = "List of Quota limits with the quota request status."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimit>,
     #[doc = "The uri to fetch the next page of quota limits. When there are no more pages, this is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1415,7 +1509,11 @@ impl QuotaRequestDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaRequestDetailsList {
     #[doc = "The quota Requests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaRequestDetails>,
     #[doc = "The uri to fetch the next page of quota limits. When there are no more pages, this is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1466,7 +1564,11 @@ pub struct QuotaRequestProperties {
     #[serde(rename = "requestSubmitTime", default, with = "azure_core::date::rfc3339::option")]
     pub request_submit_time: Option<time::OffsetDateTime>,
     #[doc = "The quotaRequests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubRequest>,
 }
 impl QuotaRequestProperties {
@@ -1659,7 +1761,11 @@ impl Serialize for ReservationBillingPlan {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationResponse>,
     #[doc = "Url to get the next page of reservations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1682,7 +1788,12 @@ pub struct ReservationMergeProperties {
     #[serde(rename = "mergeDestination", default, skip_serializing_if = "Option::is_none")]
     pub merge_destination: Option<String>,
     #[doc = "Resource Ids of the Source Reservation's merged to form this Reservation. Format of the resource Id is /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
-    #[serde(rename = "mergeSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mergeSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub merge_sources: Vec<String>,
 }
 impl ReservationMergeProperties {
@@ -1701,7 +1812,11 @@ pub struct ReservationOrderBillingPlanInformation {
     #[doc = "For recurring billing plans, indicates the date when next payment will be processed. Null when total is paid off."]
     #[serde(rename = "nextPaymentDueDate", default, skip_serializing_if = "Option::is_none")]
     pub next_payment_due_date: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transactions: Vec<PaymentDetail>,
 }
 impl ReservationOrderBillingPlanInformation {
@@ -1711,7 +1826,11 @@ impl ReservationOrderBillingPlanInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationOrderList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationOrderResponse>,
     #[doc = "Url to get the next page of reservationOrders."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1757,7 +1876,11 @@ pub struct ReservationOrderProperties {
     #[doc = "Information describing the type of billing plan for this reservation."]
     #[serde(rename = "planInformation", default, skip_serializing_if = "Option::is_none")]
     pub plan_information: Option<ReservationOrderBillingPlanInformation>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations: Vec<ReservationResponse>,
 }
 impl ReservationOrderProperties {
@@ -1883,7 +2006,12 @@ impl ReservationResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationSplitProperties {
     #[doc = "List of destination Resource Id that are created due to split. Format of the resource Id is /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
-    #[serde(rename = "splitDestinations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "splitDestinations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub split_destinations: Vec<String>,
     #[doc = "Resource Id of the Reservation from which this is split. Format of the resource Id is /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
     #[serde(rename = "splitSource", default, skip_serializing_if = "Option::is_none")]
@@ -2234,7 +2362,11 @@ pub struct ServiceError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The list of error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ServiceErrorDetail>,
 }
 impl ServiceError {
@@ -2326,7 +2458,11 @@ pub struct SkuRestriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for restriction."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -2340,7 +2476,11 @@ impl SkuRestriction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SplitProperties {
     #[doc = "List of the quantities in the new reservations to create."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub quantities: Vec<i64>,
     #[doc = "Resource id of the reservation to be split. Format of the resource id should be /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
     #[serde(rename = "reservationId", default, skip_serializing_if = "Option::is_none")]
@@ -2393,7 +2533,11 @@ impl SubRequest {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionScopeProperties {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<ScopeProperties>,
 }
 impl SubscriptionScopeProperties {
@@ -2471,7 +2615,12 @@ pub struct SupportRequestAction {
     #[serde(rename = "preferredContactMethod", default, skip_serializing_if = "Option::is_none")]
     pub preferred_contact_method: Option<ContactMethod>,
     #[doc = "The alternate email address of the recipient."]
-    #[serde(rename = "alternateEmailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateEmailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_email_addresses: Vec<String>,
 }
 impl SupportRequestAction {
diff --git a/services/mgmt/reservations/src/package_2021_07_01/models.rs b/services/mgmt/reservations/src/package_2021_07_01/models.rs
index 9889a11c89..de2c35e010 100644
--- a/services/mgmt/reservations/src/package_2021_07_01/models.rs
+++ b/services/mgmt/reservations/src/package_2021_07_01/models.rs
@@ -5,7 +5,11 @@ use serde::{Deserialize, Serialize, Serializer};
 use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AppliedReservationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
     #[doc = "Url to get the next page of reservations"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -108,7 +112,11 @@ impl AvailableScopeRequest {
 #[doc = "Available scope request properties"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableScopeRequestProperties {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl AvailableScopeRequestProperties {
@@ -220,10 +228,20 @@ impl CalculateExchangeRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CalculateExchangeRequestProperties {
     #[doc = "List of reservations that are being purchased in this exchange."]
-    #[serde(rename = "reservationsToPurchase", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToPurchase",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_purchase: Vec<PurchaseRequest>,
     #[doc = "List of reservations that are being returned in this exchange."]
-    #[serde(rename = "reservationsToExchange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToExchange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_exchange: Vec<ReservationToReturn>,
 }
 impl CalculateExchangeRequestProperties {
@@ -244,10 +262,20 @@ pub struct CalculateExchangeResponseProperties {
     #[serde(rename = "purchasesTotal", default, skip_serializing_if = "Option::is_none")]
     pub purchases_total: Option<Price>,
     #[doc = "Details of the reservations being purchased"]
-    #[serde(rename = "reservationsToPurchase", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToPurchase",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_purchase: Vec<ReservationToPurchaseCalculateExchange>,
     #[doc = "Details of the reservations being returned"]
-    #[serde(rename = "reservationsToExchange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToExchange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_exchange: Vec<ReservationToExchange>,
     #[doc = "Exchange policy errors"]
     #[serde(rename = "policyResult", default, skip_serializing_if = "Option::is_none")]
@@ -300,7 +328,12 @@ pub struct CalculatePriceResponseProperties {
     #[doc = "Amount that Microsoft uses for record. Used during refund for calculating refund limit. Tax is not included."]
     #[serde(rename = "pricingCurrencyTotal", default, skip_serializing_if = "Option::is_none")]
     pub pricing_currency_total: Option<calculate_price_response_properties::PricingCurrencyTotal>,
-    #[serde(rename = "paymentSchedule", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "paymentSchedule",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub payment_schedule: Vec<PaymentDetail>,
 }
 impl CalculatePriceResponseProperties {
@@ -352,16 +385,33 @@ pub struct Catalog {
     #[serde(rename = "billingPlans", default, skip_serializing_if = "Option::is_none")]
     pub billing_plans: Option<serde_json::Value>,
     #[doc = "Available reservation terms for this resource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub terms: Vec<ReservationTerm>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "skuProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_properties: Vec<SkuProperty>,
     #[doc = "Pricing information about the SKU"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub msrp: Option<catalog::Msrp>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<SkuRestriction>,
     #[doc = "The tier of this SKU"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -369,7 +419,11 @@ pub struct Catalog {
     #[doc = "The size of this SKU"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub size: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl Catalog {
@@ -408,7 +462,11 @@ pub struct ChangeDirectoryResponse {
     #[doc = "Change directory result for reservation order or reservation"]
     #[serde(rename = "reservationOrder", default, skip_serializing_if = "Option::is_none")]
     pub reservation_order: Option<ChangeDirectoryResult>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations: Vec<ChangeDirectoryResult>,
 }
 impl ChangeDirectoryResponse {
@@ -441,7 +499,11 @@ impl ChangeDirectoryResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CreateGenericQuotaRequestParameters {
     #[doc = "Quota change requests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimitBase>,
 }
 impl CreateGenericQuotaRequestParameters {
@@ -832,7 +894,12 @@ impl ExchangePolicyError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExchangePolicyErrors {
     #[doc = "Exchange Policy errors"]
-    #[serde(rename = "policyErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_errors: Vec<ExchangePolicyError>,
 }
 impl ExchangePolicyErrors {
@@ -877,10 +944,20 @@ pub struct ExchangeResponseProperties {
     #[serde(rename = "purchasesTotal", default, skip_serializing_if = "Option::is_none")]
     pub purchases_total: Option<Price>,
     #[doc = "Details of the reservations being purchased"]
-    #[serde(rename = "reservationsToPurchase", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToPurchase",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_purchase: Vec<ReservationToPurchaseExchange>,
     #[doc = "Details of the reservations being returned"]
-    #[serde(rename = "reservationsToExchange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToExchange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_exchange: Vec<ReservationToReturnForExchange>,
     #[doc = "Exchange policy errors"]
     #[serde(rename = "policyResult", default, skip_serializing_if = "Option::is_none")]
@@ -1008,7 +1085,11 @@ pub enum Location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MergeProperties {
     #[doc = "Format of the resource id should be /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sources: Vec<String>,
 }
 impl MergeProperties {
@@ -1044,7 +1125,11 @@ impl OperationDisplay {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResponse>,
     #[doc = "Url to get the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1365,7 +1450,11 @@ pub mod purchase_request_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaLimits {
     #[doc = "List of quotas (service limits)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimitBase>,
     #[doc = "The URI for fetching the next page of quotas (service limits). When no more pages exist, the value is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1386,7 +1475,11 @@ impl QuotaLimits {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaLimitsResponse {
     #[doc = "List of quotas with the quota request status."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimit>,
     #[doc = "The URI for fetching the next page of quota limits. When no more pages exist, the value is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1452,7 +1545,11 @@ impl QuotaRequestDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaRequestDetailsList {
     #[doc = "The quota requests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaRequestDetails>,
     #[doc = "The URI to fetch the next page of quota limits. When there are no more pages, this is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1503,7 +1600,11 @@ pub struct QuotaRequestProperties {
     #[serde(rename = "requestSubmitTime", default, with = "azure_core::date::rfc3339::option")]
     pub request_submit_time: Option<time::OffsetDateTime>,
     #[doc = "The quotaRequests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubRequest>,
 }
 impl QuotaRequestProperties {
@@ -1698,7 +1799,11 @@ impl Serialize for ReservationBillingPlan {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationResponse>,
     #[doc = "Url to get the next page of reservations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1721,7 +1826,12 @@ pub struct ReservationMergeProperties {
     #[serde(rename = "mergeDestination", default, skip_serializing_if = "Option::is_none")]
     pub merge_destination: Option<String>,
     #[doc = "Resource Ids of the Source Reservation's merged to form this Reservation. Format of the resource Id is /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
-    #[serde(rename = "mergeSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mergeSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub merge_sources: Vec<String>,
 }
 impl ReservationMergeProperties {
@@ -1740,7 +1850,11 @@ pub struct ReservationOrderBillingPlanInformation {
     #[doc = "For recurring billing plans, indicates the date when next payment will be processed. Null when total is paid off."]
     #[serde(rename = "nextPaymentDueDate", default, skip_serializing_if = "Option::is_none")]
     pub next_payment_due_date: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transactions: Vec<PaymentDetail>,
 }
 impl ReservationOrderBillingPlanInformation {
@@ -1750,7 +1864,11 @@ impl ReservationOrderBillingPlanInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationOrderList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationOrderResponse>,
     #[doc = "Url to get the next page of reservationOrders."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1796,7 +1914,11 @@ pub struct ReservationOrderProperties {
     #[doc = "Information describing the type of billing plan for this reservation."]
     #[serde(rename = "planInformation", default, skip_serializing_if = "Option::is_none")]
     pub plan_information: Option<ReservationOrderBillingPlanInformation>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations: Vec<ReservationResponse>,
 }
 impl ReservationOrderProperties {
@@ -1875,7 +1997,12 @@ pub mod reservation_response {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationSplitProperties {
     #[doc = "List of destination Resource Id that are created due to split. Format of the resource Id is /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
-    #[serde(rename = "splitDestinations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "splitDestinations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub split_destinations: Vec<String>,
     #[doc = "Resource Id of the Reservation from which this is split. Format of the resource Id is /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
     #[serde(rename = "splitSource", default, skip_serializing_if = "Option::is_none")]
@@ -2128,7 +2255,11 @@ impl ReservationUtilizationAggregates {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationsListResult {
     #[doc = "The list of reservations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationResponse>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2249,7 +2380,11 @@ pub mod reservations_properties {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub trend: Option<String>,
         #[doc = "The array of aggregates of a reservation's utilization"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub aggregates: Vec<ReservationUtilizationAggregates>,
     }
     impl Utilization {
@@ -2427,7 +2562,11 @@ pub struct ServiceError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The list of error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ServiceErrorDetail>,
 }
 impl ServiceError {
@@ -2494,7 +2633,11 @@ pub struct SkuRestriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for restriction."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -2508,7 +2651,11 @@ impl SkuRestriction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SplitProperties {
     #[doc = "List of the quantities in the new reservations to create."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub quantities: Vec<i32>,
     #[doc = "Resource id of the reservation to be split. Format of the resource id should be /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
     #[serde(rename = "reservationId", default, skip_serializing_if = "Option::is_none")]
@@ -2561,7 +2708,11 @@ impl SubRequest {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionScopeProperties {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<ScopeProperties>,
 }
 impl SubscriptionScopeProperties {
diff --git a/services/mgmt/reservations/src/package_2022_03/models.rs b/services/mgmt/reservations/src/package_2022_03/models.rs
index 3a3a0afc84..3c995db02f 100644
--- a/services/mgmt/reservations/src/package_2022_03/models.rs
+++ b/services/mgmt/reservations/src/package_2022_03/models.rs
@@ -5,7 +5,11 @@ use serde::{Deserialize, Serialize, Serializer};
 use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AppliedReservationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
     #[doc = "Url to get the next page of reservations"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -108,7 +112,11 @@ impl AvailableScopeRequest {
 #[doc = "Available scope request properties"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableScopeRequestProperties {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl AvailableScopeRequestProperties {
@@ -220,10 +228,20 @@ impl CalculateExchangeRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CalculateExchangeRequestProperties {
     #[doc = "List of reservations that are being purchased in this exchange."]
-    #[serde(rename = "reservationsToPurchase", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToPurchase",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_purchase: Vec<PurchaseRequest>,
     #[doc = "List of reservations that are being returned in this exchange."]
-    #[serde(rename = "reservationsToExchange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToExchange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_exchange: Vec<ReservationToReturn>,
 }
 impl CalculateExchangeRequestProperties {
@@ -244,10 +262,20 @@ pub struct CalculateExchangeResponseProperties {
     #[serde(rename = "purchasesTotal", default, skip_serializing_if = "Option::is_none")]
     pub purchases_total: Option<Price>,
     #[doc = "Details of the reservations being purchased"]
-    #[serde(rename = "reservationsToPurchase", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToPurchase",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_purchase: Vec<ReservationToPurchaseCalculateExchange>,
     #[doc = "Details of the reservations being returned"]
-    #[serde(rename = "reservationsToExchange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToExchange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_exchange: Vec<ReservationToExchange>,
     #[doc = "Exchange policy errors"]
     #[serde(rename = "policyResult", default, skip_serializing_if = "Option::is_none")]
@@ -300,7 +328,12 @@ pub struct CalculatePriceResponseProperties {
     #[doc = "Amount that Microsoft uses for record. Used during refund for calculating refund limit. Tax is not included."]
     #[serde(rename = "pricingCurrencyTotal", default, skip_serializing_if = "Option::is_none")]
     pub pricing_currency_total: Option<calculate_price_response_properties::PricingCurrencyTotal>,
-    #[serde(rename = "paymentSchedule", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "paymentSchedule",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub payment_schedule: Vec<PaymentDetail>,
 }
 impl CalculatePriceResponseProperties {
@@ -392,16 +425,33 @@ pub struct Catalog {
     #[serde(rename = "billingPlans", default, skip_serializing_if = "Option::is_none")]
     pub billing_plans: Option<serde_json::Value>,
     #[doc = "Available reservation terms for this resource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub terms: Vec<ReservationTerm>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "skuProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_properties: Vec<SkuProperty>,
     #[doc = "Pricing information about the SKU"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub msrp: Option<catalog::Msrp>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<SkuRestriction>,
     #[doc = "The tier of this SKU"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -409,7 +459,11 @@ pub struct Catalog {
     #[doc = "The size of this SKU"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub size: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl Catalog {
@@ -448,7 +502,11 @@ pub struct ChangeDirectoryResponse {
     #[doc = "Change directory result for reservation order or reservation"]
     #[serde(rename = "reservationOrder", default, skip_serializing_if = "Option::is_none")]
     pub reservation_order: Option<ChangeDirectoryResult>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations: Vec<ChangeDirectoryResult>,
 }
 impl ChangeDirectoryResponse {
@@ -481,7 +539,11 @@ impl ChangeDirectoryResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CreateGenericQuotaRequestParameters {
     #[doc = "Quota change requests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimitBase>,
 }
 impl CreateGenericQuotaRequestParameters {
@@ -914,7 +976,12 @@ impl ExchangePolicyError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExchangePolicyErrors {
     #[doc = "Exchange Policy errors"]
-    #[serde(rename = "policyErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_errors: Vec<ExchangePolicyError>,
 }
 impl ExchangePolicyErrors {
@@ -959,10 +1026,20 @@ pub struct ExchangeResponseProperties {
     #[serde(rename = "purchasesTotal", default, skip_serializing_if = "Option::is_none")]
     pub purchases_total: Option<Price>,
     #[doc = "Details of the reservations being purchased"]
-    #[serde(rename = "reservationsToPurchase", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToPurchase",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_purchase: Vec<ReservationToPurchaseExchange>,
     #[doc = "Details of the reservations being returned"]
-    #[serde(rename = "reservationsToExchange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reservationsToExchange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations_to_exchange: Vec<ReservationToReturnForExchange>,
     #[doc = "Exchange policy errors"]
     #[serde(rename = "policyResult", default, skip_serializing_if = "Option::is_none")]
@@ -1143,7 +1220,11 @@ impl Serialize for Location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MergeProperties {
     #[doc = "Format of the resource id should be /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sources: Vec<String>,
 }
 impl MergeProperties {
@@ -1179,7 +1260,11 @@ impl OperationDisplay {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResponse>,
     #[doc = "Url to get the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1542,7 +1627,11 @@ pub mod purchase_request_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaLimits {
     #[doc = "List of quotas (service limits)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimitBase>,
     #[doc = "The URI for fetching the next page of quotas (service limits). When no more pages exist, the value is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1563,7 +1652,11 @@ impl QuotaLimits {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaLimitsResponse {
     #[doc = "List of quotas with the quota request status."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimit>,
     #[doc = "The URI for fetching the next page of quota limits. When no more pages exist, the value is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1629,7 +1722,11 @@ impl QuotaRequestDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaRequestDetailsList {
     #[doc = "The quota requests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaRequestDetails>,
     #[doc = "The URI to fetch the next page of quota limits. When there are no more pages, this is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1680,7 +1777,11 @@ pub struct QuotaRequestProperties {
     #[serde(rename = "requestSubmitTime", default, with = "azure_core::date::rfc3339::option")]
     pub request_submit_time: Option<time::OffsetDateTime>,
     #[doc = "The quotaRequests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubRequest>,
 }
 impl QuotaRequestProperties {
@@ -1849,7 +1950,12 @@ pub struct RefundPolicyResultProperty {
     #[serde(rename = "maxRefundLimit", default, skip_serializing_if = "Option::is_none")]
     pub max_refund_limit: Option<Price>,
     #[doc = "Refund Policy errors"]
-    #[serde(rename = "policyErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_errors: Vec<RefundPolicyError>,
 }
 impl RefundPolicyResultProperty {
@@ -2011,7 +2117,11 @@ impl Serialize for ReservationBillingPlan {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationResponse>,
     #[doc = "Url to get the next page of reservations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2034,7 +2144,12 @@ pub struct ReservationMergeProperties {
     #[serde(rename = "mergeDestination", default, skip_serializing_if = "Option::is_none")]
     pub merge_destination: Option<String>,
     #[doc = "Resource Ids of the Source Reservation's merged to form this Reservation. Format of the resource Id is /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
-    #[serde(rename = "mergeSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mergeSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub merge_sources: Vec<String>,
 }
 impl ReservationMergeProperties {
@@ -2053,7 +2168,11 @@ pub struct ReservationOrderBillingPlanInformation {
     #[doc = "For recurring billing plans, indicates the date when next payment will be processed. Null when total is paid off."]
     #[serde(rename = "nextPaymentDueDate", default, skip_serializing_if = "Option::is_none")]
     pub next_payment_due_date: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transactions: Vec<PaymentDetail>,
 }
 impl ReservationOrderBillingPlanInformation {
@@ -2063,7 +2182,11 @@ impl ReservationOrderBillingPlanInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationOrderList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationOrderResponse>,
     #[doc = "Url to get the next page of reservationOrders."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2112,7 +2235,11 @@ pub struct ReservationOrderProperties {
     #[doc = "Information describing the type of billing plan for this reservation."]
     #[serde(rename = "planInformation", default, skip_serializing_if = "Option::is_none")]
     pub plan_information: Option<ReservationOrderBillingPlanInformation>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations: Vec<ReservationResponse>,
 }
 impl ReservationOrderProperties {
@@ -2191,7 +2318,12 @@ pub mod reservation_response {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationSplitProperties {
     #[doc = "List of destination Resource Id that are created due to split. Format of the resource Id is /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
-    #[serde(rename = "splitDestinations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "splitDestinations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub split_destinations: Vec<String>,
     #[doc = "Resource Id of the Reservation from which this is split. Format of the resource Id is /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
     #[serde(rename = "splitSource", default, skip_serializing_if = "Option::is_none")]
@@ -2444,7 +2576,11 @@ impl ReservationUtilizationAggregates {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationsListResult {
     #[doc = "The list of reservations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationResponse>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2568,7 +2704,11 @@ pub mod reservations_properties {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub trend: Option<String>,
         #[doc = "The array of aggregates of a reservation's utilization"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub aggregates: Vec<ReservationUtilizationAggregates>,
     }
     impl Utilization {
@@ -2748,7 +2888,11 @@ pub struct ServiceError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The list of error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ServiceErrorDetail>,
 }
 impl ServiceError {
@@ -2815,7 +2959,11 @@ pub struct SkuRestriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for restriction."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -2829,7 +2977,11 @@ impl SkuRestriction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SplitProperties {
     #[doc = "List of the quantities in the new reservations to create."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub quantities: Vec<i32>,
     #[doc = "Resource id of the reservation to be split. Format of the resource id should be /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
     #[serde(rename = "reservationId", default, skip_serializing_if = "Option::is_none")]
@@ -2882,7 +3034,11 @@ impl SubRequest {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionScopeProperties {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<ScopeProperties>,
 }
 impl SubscriptionScopeProperties {
diff --git a/services/mgmt/reservations/src/package_preview_2019_04/models.rs b/services/mgmt/reservations/src/package_preview_2019_04/models.rs
index 2deabaabd5..22cb3ad969 100644
--- a/services/mgmt/reservations/src/package_preview_2019_04/models.rs
+++ b/services/mgmt/reservations/src/package_preview_2019_04/models.rs
@@ -5,7 +5,11 @@ use serde::{Deserialize, Serialize, Serializer};
 use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AppliedReservationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
     #[doc = "Url to get the next page of reservations"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -115,7 +119,11 @@ impl AvailableScopeRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableScopeRequestProperties {
     #[doc = "Scopes to be checked for availability"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl AvailableScopeRequestProperties {
@@ -163,7 +171,12 @@ pub struct CalculatePriceResponseProperties {
     #[doc = "Amount that Microsoft uses for record. Used during refund for calculating refund limit. Tax is not included."]
     #[serde(rename = "pricingCurrencyTotal", default, skip_serializing_if = "Option::is_none")]
     pub pricing_currency_total: Option<calculate_price_response_properties::PricingCurrencyTotal>,
-    #[serde(rename = "paymentSchedule", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "paymentSchedule",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub payment_schedule: Vec<PaymentDetail>,
 }
 impl CalculatePriceResponseProperties {
@@ -215,13 +228,30 @@ pub struct Catalog {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub msrp: Option<serde_json::Value>,
     #[doc = "Available reservation terms for this resource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub terms: Vec<ReservationTerm>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "skuProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_properties: Vec<SkuProperty>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<SkuRestriction>,
 }
 impl Catalog {
@@ -485,7 +515,11 @@ impl Serialize for InstanceFlexibility {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MergeProperties {
     #[doc = "Format of the resource id should be /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sources: Vec<String>,
 }
 impl MergeProperties {
@@ -535,7 +569,11 @@ impl OperationDisplay {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResponse>,
     #[doc = "Url to get the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -861,7 +899,11 @@ impl Serialize for ReservationBillingPlan {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationResponse>,
     #[doc = "Url to get the next page of reservations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -884,7 +926,12 @@ pub struct ReservationMergeProperties {
     #[serde(rename = "mergeDestination", default, skip_serializing_if = "Option::is_none")]
     pub merge_destination: Option<String>,
     #[doc = "Resource Ids of the Source Reservation's merged to form this Reservation. Format of the resource Id is /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
-    #[serde(rename = "mergeSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mergeSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub merge_sources: Vec<String>,
 }
 impl ReservationMergeProperties {
@@ -903,7 +950,11 @@ pub struct ReservationOrderBillingPlanInformation {
     #[doc = "For recurring billing plans, indicates the date when next payment will be processed. Null when total is paid off."]
     #[serde(rename = "nextPaymentDueDate", default, skip_serializing_if = "Option::is_none")]
     pub next_payment_due_date: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transactions: Vec<PaymentDetail>,
 }
 impl ReservationOrderBillingPlanInformation {
@@ -913,7 +964,11 @@ impl ReservationOrderBillingPlanInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationOrderList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationOrderResponse>,
     #[doc = "Url to get the next page of reservationOrders."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -962,7 +1017,11 @@ pub struct ReservationOrderProperties {
     #[doc = "Information describing the type of billing plan for this reservation."]
     #[serde(rename = "planInformation", default, skip_serializing_if = "Option::is_none")]
     pub plan_information: Option<ReservationOrderBillingPlanInformation>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations: Vec<ReservationResponse>,
 }
 impl ReservationOrderProperties {
@@ -1101,7 +1160,12 @@ impl ReservationResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationSplitProperties {
     #[doc = "List of destination Resource Id that are created due to split. Format of the resource Id is /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
-    #[serde(rename = "splitDestinations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "splitDestinations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub split_destinations: Vec<String>,
     #[doc = "Resource Id of the Reservation from which this is split. Format of the resource Id is /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
     #[serde(rename = "splitSource", default, skip_serializing_if = "Option::is_none")]
@@ -1332,7 +1396,11 @@ pub struct SkuRestriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for restriction."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -1346,7 +1414,11 @@ impl SkuRestriction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SplitProperties {
     #[doc = "List of the quantities in the new reservations to create."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub quantities: Vec<i64>,
     #[doc = "Resource id of the reservation to be split. Format of the resource id should be /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
     #[serde(rename = "reservationId", default, skip_serializing_if = "Option::is_none")]
@@ -1369,7 +1441,11 @@ impl SplitRequest {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionScopeProperties {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<ScopeProperties>,
 }
 impl SubscriptionScopeProperties {
diff --git a/services/mgmt/reservations/src/package_preview_2019_07_19/models.rs b/services/mgmt/reservations/src/package_preview_2019_07_19/models.rs
index 7cf73b7222..8b3dc06aaa 100644
--- a/services/mgmt/reservations/src/package_preview_2019_07_19/models.rs
+++ b/services/mgmt/reservations/src/package_preview_2019_07_19/models.rs
@@ -17,7 +17,11 @@ impl Actions {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AppliedReservationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
     #[doc = "Url to get the next page of reservations"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -187,7 +191,11 @@ impl AvailableScopeRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableScopeRequestProperties {
     #[doc = "Scopes to be checked for availability"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl AvailableScopeRequestProperties {
@@ -235,7 +243,12 @@ pub struct CalculatePriceResponseProperties {
     #[doc = "Amount that Microsoft uses for record. Used during refund for calculating refund limit. Tax is not included."]
     #[serde(rename = "pricingCurrencyTotal", default, skip_serializing_if = "Option::is_none")]
     pub pricing_currency_total: Option<calculate_price_response_properties::PricingCurrencyTotal>,
-    #[serde(rename = "paymentSchedule", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "paymentSchedule",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub payment_schedule: Vec<PaymentDetail>,
 }
 impl CalculatePriceResponseProperties {
@@ -287,13 +300,30 @@ pub struct Catalog {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub msrp: Option<serde_json::Value>,
     #[doc = "Available reservation terms for this resource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub terms: Vec<ReservationTerm>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
-    #[serde(rename = "skuProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "skuProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sku_properties: Vec<SkuProperty>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<SkuRestriction>,
 }
 impl Catalog {
@@ -342,7 +372,11 @@ impl Serialize for ContactMethod {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CreateGenericQuotaRequestParameters {
     #[doc = "Quota change requests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimitBase>,
 }
 impl CreateGenericQuotaRequestParameters {
@@ -393,7 +427,12 @@ impl EmailAction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EmailActions {
     #[doc = "The list of email actions."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<EmailAction>,
 }
 impl EmailActions {
@@ -675,7 +714,11 @@ impl Serialize for InstanceFlexibility {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MergeProperties {
     #[doc = "Format of the resource id should be /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sources: Vec<String>,
 }
 impl MergeProperties {
@@ -725,7 +768,11 @@ impl OperationDisplay {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResponse>,
     #[doc = "Url to get the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -985,7 +1032,11 @@ pub mod purchase_request_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaLimits {
     #[doc = "List of Quota limits."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimitBase>,
     #[doc = "The uri to fetch the next page of quota limits. When there are no more pages, this is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1006,7 +1057,11 @@ impl QuotaLimits {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaLimitsResponse {
     #[doc = "List of Quota limits with the quota request status."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CurrentQuotaLimit>,
     #[doc = "The uri to fetch the next page of quota limits. When there are no more pages, this is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1072,7 +1127,11 @@ impl QuotaRequestDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaRequestDetailsList {
     #[doc = "The quota Requests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QuotaRequestDetails>,
     #[doc = "The uri to fetch the next page of quota limits. When there are no more pages, this is null."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1123,7 +1182,11 @@ pub struct QuotaRequestProperties {
     #[serde(rename = "requestSubmitTime", default, with = "azure_core::date::rfc3339::option")]
     pub request_submit_time: Option<time::OffsetDateTime>,
     #[doc = "The quotaRequests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubRequest>,
 }
 impl QuotaRequestProperties {
@@ -1316,7 +1379,11 @@ impl Serialize for ReservationBillingPlan {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationResponse>,
     #[doc = "Url to get the next page of reservations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1339,7 +1406,12 @@ pub struct ReservationMergeProperties {
     #[serde(rename = "mergeDestination", default, skip_serializing_if = "Option::is_none")]
     pub merge_destination: Option<String>,
     #[doc = "Resource Ids of the Source Reservation's merged to form this Reservation. Format of the resource Id is /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
-    #[serde(rename = "mergeSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mergeSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub merge_sources: Vec<String>,
 }
 impl ReservationMergeProperties {
@@ -1358,7 +1430,11 @@ pub struct ReservationOrderBillingPlanInformation {
     #[doc = "For recurring billing plans, indicates the date when next payment will be processed. Null when total is paid off."]
     #[serde(rename = "nextPaymentDueDate", default, skip_serializing_if = "Option::is_none")]
     pub next_payment_due_date: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transactions: Vec<PaymentDetail>,
 }
 impl ReservationOrderBillingPlanInformation {
@@ -1368,7 +1444,11 @@ impl ReservationOrderBillingPlanInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationOrderList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReservationOrderResponse>,
     #[doc = "Url to get the next page of reservationOrders."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1417,7 +1497,11 @@ pub struct ReservationOrderProperties {
     #[doc = "Information describing the type of billing plan for this reservation."]
     #[serde(rename = "planInformation", default, skip_serializing_if = "Option::is_none")]
     pub plan_information: Option<ReservationOrderBillingPlanInformation>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reservations: Vec<ReservationResponse>,
 }
 impl ReservationOrderProperties {
@@ -1556,7 +1640,12 @@ impl ReservationResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReservationSplitProperties {
     #[doc = "List of destination Resource Id that are created due to split. Format of the resource Id is /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
-    #[serde(rename = "splitDestinations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "splitDestinations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub split_destinations: Vec<String>,
     #[doc = "Resource Id of the Reservation from which this is split. Format of the resource Id is /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
     #[serde(rename = "splitSource", default, skip_serializing_if = "Option::is_none")]
@@ -1830,7 +1919,11 @@ pub struct ServiceError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The list of error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ServiceErrorDetail>,
 }
 impl ServiceError {
@@ -1922,7 +2015,11 @@ pub struct SkuRestriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for restriction."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -1936,7 +2033,11 @@ impl SkuRestriction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SplitProperties {
     #[doc = "List of the quantities in the new reservations to create."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub quantities: Vec<i64>,
     #[doc = "Resource id of the reservation to be split. Format of the resource id should be /providers/Microsoft.Capacity/reservationOrders/{reservationOrderId}/reservations/{reservationId}"]
     #[serde(rename = "reservationId", default, skip_serializing_if = "Option::is_none")]
@@ -1989,7 +2090,11 @@ impl SubRequest {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionScopeProperties {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<ScopeProperties>,
 }
 impl SubscriptionScopeProperties {
@@ -2067,7 +2172,12 @@ pub struct SupportRequestAction {
     #[serde(rename = "preferredContactMethod", default, skip_serializing_if = "Option::is_none")]
     pub preferred_contact_method: Option<ContactMethod>,
     #[doc = "The alternate email address of the recipient."]
-    #[serde(rename = "alternateEmailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternateEmailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternate_email_addresses: Vec<String>,
 }
 impl SupportRequestAction {
diff --git a/services/mgmt/resourceconnector/src/package_2021_10_31_preview/models.rs b/services/mgmt/resourceconnector/src/package_2021_10_31_preview/models.rs
index 283f57af26..46e7e4dc46 100644
--- a/services/mgmt/resourceconnector/src/package_2021_10_31_preview/models.rs
+++ b/services/mgmt/resourceconnector/src/package_2021_10_31_preview/models.rs
@@ -31,10 +31,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -263,7 +272,11 @@ pub struct ApplianceListCredentialResults {
     #[serde(rename = "hybridConnectionConfig", default, skip_serializing_if = "Option::is_none")]
     pub hybrid_connection_config: Option<HybridConnectionConfig>,
     #[doc = "The list of appliance kubeconfigs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kubeconfigs: Vec<ApplianceCredentialKubeconfig>,
 }
 impl ApplianceListCredentialResults {
@@ -278,7 +291,11 @@ pub struct ApplianceListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Appliances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Appliance>,
 }
 impl azure_core::Continuable for ApplianceListResult {
diff --git a/services/mgmt/resourceconnector/src/package_2022_04_15_preview/models.rs b/services/mgmt/resourceconnector/src/package_2022_04_15_preview/models.rs
index 6e9a5917e8..9f0d914a71 100644
--- a/services/mgmt/resourceconnector/src/package_2022_04_15_preview/models.rs
+++ b/services/mgmt/resourceconnector/src/package_2022_04_15_preview/models.rs
@@ -31,10 +31,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -319,7 +328,12 @@ pub struct UpgradeGraphProperties {
     #[serde(rename = "applianceVersion", default, skip_serializing_if = "Option::is_none")]
     pub appliance_version: Option<String>,
     #[doc = "This contains the current version and supported upgrade versions."]
-    #[serde(rename = "supportedVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_versions: Vec<SupportedVersion>,
 }
 impl UpgradeGraphProperties {
@@ -413,7 +427,11 @@ pub mod appliance_credential_kubeconfig {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplianceListClusterCustomerUserCredentialResults {
     #[doc = "The list of appliance kubeconfigs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kubeconfigs: Vec<ApplianceCredentialKubeconfig>,
     #[doc = "Map of Customer User Public and Private SSH Keys"]
     #[serde(rename = "sshKeys", default, skip_serializing_if = "Option::is_none")]
@@ -431,7 +449,11 @@ pub struct ApplianceListCredentialResults {
     #[serde(rename = "hybridConnectionConfig", default, skip_serializing_if = "Option::is_none")]
     pub hybrid_connection_config: Option<HybridConnectionConfig>,
     #[doc = "The list of appliance kubeconfigs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kubeconfigs: Vec<ApplianceCredentialKubeconfig>,
 }
 impl ApplianceListCredentialResults {
@@ -446,7 +468,11 @@ pub struct ApplianceListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Appliances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Appliance>,
 }
 impl azure_core::Continuable for ApplianceListResult {
diff --git a/services/mgmt/resourcegraph/src/package_2021_03/models.rs b/services/mgmt/resourcegraph/src/package_2021_03/models.rs
index 3278a68995..b0ecf4fcae 100644
--- a/services/mgmt/resourcegraph/src/package_2021_03/models.rs
+++ b/services/mgmt/resourcegraph/src/package_2021_03/models.rs
@@ -39,7 +39,11 @@ pub struct Error {
     #[doc = "A human readable error message."]
     pub message: String,
     #[doc = "Error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetails>,
 }
 impl Error {
@@ -227,7 +231,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Resource Graph operations supported by the Resource Graph resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -245,10 +253,19 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct QueryRequest {
     #[doc = "Azure subscriptions against which to execute the query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
     #[doc = "Azure management groups against which to execute the query. Example: [ 'mg1', 'mg2' ]"]
-    #[serde(rename = "managementGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managementGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub management_groups: Vec<String>,
     #[doc = "The resources query."]
     pub query: String,
@@ -256,7 +273,11 @@ pub struct QueryRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub options: Option<QueryRequestOptions>,
     #[doc = "An array of facet requests to be computed against the query result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub facets: Vec<FacetRequest>,
 }
 impl QueryRequest {
@@ -327,7 +348,11 @@ pub struct QueryResponse {
     #[doc = "Query output in JObject array or Table format."]
     pub data: serde_json::Value,
     #[doc = "Query facets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub facets: Vec<Facet>,
 }
 impl QueryResponse {
diff --git a/services/mgmt/resourcegraph/src/package_preview_2020_04/models.rs b/services/mgmt/resourcegraph/src/package_preview_2020_04/models.rs
index 193772e7c5..1916b53c09 100644
--- a/services/mgmt/resourcegraph/src/package_preview_2020_04/models.rs
+++ b/services/mgmt/resourcegraph/src/package_preview_2020_04/models.rs
@@ -54,7 +54,11 @@ pub struct Error {
     #[doc = "A human readable error message."]
     pub message: String,
     #[doc = "Error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetails>,
 }
 impl Error {
@@ -242,7 +246,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Resource Graph operations supported by the Resource Graph resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -260,7 +268,11 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct QueryRequest {
     #[doc = "Azure subscriptions against which to execute the query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
     #[doc = "The management group identifier."]
     #[serde(rename = "managementGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -271,7 +283,11 @@ pub struct QueryRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub options: Option<QueryRequestOptions>,
     #[doc = "An array of facet requests to be computed against the query result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub facets: Vec<FacetRequest>,
 }
 impl QueryRequest {
@@ -334,7 +350,11 @@ pub struct QueryResponse {
     #[doc = "Query output in tabular format."]
     pub data: serde_json::Value,
     #[doc = "Query facets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub facets: Vec<Facet>,
 }
 impl QueryResponse {
@@ -379,7 +399,12 @@ pub struct ResourceChangeData {
     #[serde(rename = "changeType", default, skip_serializing_if = "Option::is_none")]
     pub change_type: Option<resource_change_data::ChangeType>,
     #[doc = "An array of resource property change"]
-    #[serde(rename = "propertyChanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyChanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_changes: Vec<ResourcePropertyChange>,
 }
 impl ResourceChangeData {
@@ -423,7 +448,11 @@ impl ResourceChangeDetailsRequestParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceChangeList {
     #[doc = "The pageable value returned by the operation, i.e. a list of changes to the resource.\n\n- The list is ordered from the most recent changes to the least recent changes.\n- This list will be empty if there were no changes during the requested interval.\n- The `Before` snapshot timestamp value of the oldest change can be outside of the specified time interval."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub changes: Vec<ResourceChangeData>,
     #[doc = "Skip token that encodes the skip information while executing the current request"]
     #[serde(rename = "$skipToken", default, skip_serializing_if = "Option::is_none")]
@@ -537,7 +566,11 @@ impl ResourceSnapshotData {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourcesHistoryRequest {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub query: Option<String>,
diff --git a/services/mgmt/resourcegraph/src/package_preview_2020_09/models.rs b/services/mgmt/resourcegraph/src/package_preview_2020_09/models.rs
index 3a20f6c17b..493915296a 100644
--- a/services/mgmt/resourcegraph/src/package_preview_2020_09/models.rs
+++ b/services/mgmt/resourcegraph/src/package_preview_2020_09/models.rs
@@ -54,7 +54,11 @@ pub struct Error {
     #[doc = "A human readable error message."]
     pub message: String,
     #[doc = "Error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetails>,
 }
 impl Error {
@@ -242,7 +246,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Resource Graph operations supported by the Resource Graph resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -260,7 +268,11 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct QueryRequest {
     #[doc = "Azure subscriptions against which to execute the query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
     #[doc = "The management group identifier."]
     #[serde(rename = "managementGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -271,7 +283,11 @@ pub struct QueryRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub options: Option<QueryRequestOptions>,
     #[doc = "An array of facet requests to be computed against the query result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub facets: Vec<FacetRequest>,
 }
 impl QueryRequest {
@@ -334,7 +350,11 @@ pub struct QueryResponse {
     #[doc = "Query output in tabular format."]
     pub data: serde_json::Value,
     #[doc = "Query facets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub facets: Vec<Facet>,
 }
 impl QueryResponse {
@@ -379,7 +399,12 @@ pub struct ResourceChangeData {
     #[serde(rename = "changeType", default, skip_serializing_if = "Option::is_none")]
     pub change_type: Option<resource_change_data::ChangeType>,
     #[doc = "An array of resource property change"]
-    #[serde(rename = "propertyChanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyChanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_changes: Vec<ResourcePropertyChange>,
 }
 impl ResourceChangeData {
@@ -424,7 +449,11 @@ impl ResourceChangeDetailsRequestParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceChangeList {
     #[doc = "The pageable value returned by the operation, i.e. a list of changes to the resource.\n\n- The list is ordered from the most recent changes to the least recent changes.\n- This list will be empty if there were no changes during the requested interval.\n- The `Before` snapshot timestamp value of the oldest change can be outside of the specified time interval."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub changes: Vec<ResourceChangeData>,
     #[doc = "Skip token that encodes the skip information while executing the current request"]
     #[serde(rename = "$skipToken", default, skip_serializing_if = "Option::is_none")]
@@ -439,7 +468,12 @@ impl ResourceChangeList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ResourceChangesRequestParameters {
     #[doc = "Specifies the list of resources for a changes request."]
-    #[serde(rename = "resourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_ids: Vec<String>,
     #[doc = "The subscription id of resources to query the changes from. "]
     #[serde(rename = "subscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -550,7 +584,11 @@ impl ResourceSnapshotData {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourcesHistoryRequest {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub query: Option<String>,
diff --git a/services/mgmt/resourcegraph/src/package_preview_2021_03/models.rs b/services/mgmt/resourcegraph/src/package_preview_2021_03/models.rs
index 6713e11ff4..3eb2dd2bb3 100644
--- a/services/mgmt/resourcegraph/src/package_preview_2021_03/models.rs
+++ b/services/mgmt/resourcegraph/src/package_preview_2021_03/models.rs
@@ -54,7 +54,11 @@ pub struct Error {
     #[doc = "A human readable error message."]
     pub message: String,
     #[doc = "Error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetails>,
 }
 impl Error {
@@ -242,7 +246,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Resource Graph operations supported by the Resource Graph resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -260,10 +268,19 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct QueryRequest {
     #[doc = "Azure subscriptions against which to execute the query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
     #[doc = "Azure management groups against which to execute the query. Example: [ 'mg1', 'mg2' ]"]
-    #[serde(rename = "managementGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managementGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub management_groups: Vec<String>,
     #[doc = "The resources query."]
     pub query: String,
@@ -271,7 +288,11 @@ pub struct QueryRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub options: Option<QueryRequestOptions>,
     #[doc = "An array of facet requests to be computed against the query result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub facets: Vec<FacetRequest>,
 }
 impl QueryRequest {
@@ -342,7 +363,11 @@ pub struct QueryResponse {
     #[doc = "Query output in JObject array or Table format."]
     pub data: serde_json::Value,
     #[doc = "Query facets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub facets: Vec<Facet>,
 }
 impl QueryResponse {
@@ -387,7 +412,12 @@ pub struct ResourceChangeData {
     #[serde(rename = "changeType", default, skip_serializing_if = "Option::is_none")]
     pub change_type: Option<resource_change_data::ChangeType>,
     #[doc = "An array of resource property change"]
-    #[serde(rename = "propertyChanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyChanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_changes: Vec<ResourcePropertyChange>,
 }
 impl ResourceChangeData {
@@ -432,7 +462,11 @@ impl ResourceChangeDetailsRequestParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceChangeList {
     #[doc = "The pageable value returned by the operation, i.e. a list of changes to the resource.\n\n- The list is ordered from the most recent changes to the least recent changes.\n- This list will be empty if there were no changes during the requested interval.\n- The `Before` snapshot timestamp value of the oldest change can be outside of the specified time interval."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub changes: Vec<ResourceChangeData>,
     #[doc = "Skip token that encodes the skip information while executing the current request"]
     #[serde(rename = "$skipToken", default, skip_serializing_if = "Option::is_none")]
@@ -447,7 +481,12 @@ impl ResourceChangeList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ResourceChangesRequestParameters {
     #[doc = "Specifies the list of resources for a changes request."]
-    #[serde(rename = "resourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_ids: Vec<String>,
     #[doc = "The subscription id of resources to query the changes from. "]
     #[serde(rename = "subscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -558,7 +597,11 @@ impl ResourceSnapshotData {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourcesHistoryRequest {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub query: Option<String>,
diff --git a/services/mgmt/resourcegraph/src/package_preview_2021_06/models.rs b/services/mgmt/resourcegraph/src/package_preview_2021_06/models.rs
index cc5547010e..1e5b5076de 100644
--- a/services/mgmt/resourcegraph/src/package_preview_2021_06/models.rs
+++ b/services/mgmt/resourcegraph/src/package_preview_2021_06/models.rs
@@ -56,7 +56,11 @@ pub struct Error {
     #[doc = "A human readable error message."]
     pub message: String,
     #[doc = "Error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetails>,
 }
 impl Error {
@@ -244,7 +248,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Resource Graph operations supported by the Resource Graph resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -262,10 +270,19 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct QueryRequest {
     #[doc = "Azure subscriptions against which to execute the query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
     #[doc = "Azure management groups against which to execute the query. Example: [ 'mg1', 'mg2' ]"]
-    #[serde(rename = "managementGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managementGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub management_groups: Vec<String>,
     #[doc = "The resources query."]
     pub query: String,
@@ -273,7 +290,11 @@ pub struct QueryRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub options: Option<QueryRequestOptions>,
     #[doc = "An array of facet requests to be computed against the query result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub facets: Vec<FacetRequest>,
 }
 impl QueryRequest {
@@ -360,7 +381,11 @@ pub struct QueryResponse {
     #[doc = "Query output in JObject array or Table format."]
     pub data: serde_json::Value,
     #[doc = "Query facets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub facets: Vec<Facet>,
 }
 impl QueryResponse {
@@ -390,7 +415,11 @@ pub mod query_response {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourcesHistoryRequest {
     #[doc = "Azure subscriptions against which to execute the query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
     #[doc = "The resources query."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -399,7 +428,12 @@ pub struct ResourcesHistoryRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub options: Option<ResourcesHistoryRequestOptions>,
     #[doc = "Azure management groups against which to execute the query. Example: [ 'mg1', 'mg2' ]"]
-    #[serde(rename = "managementGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managementGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub management_groups: Vec<String>,
 }
 impl ResourcesHistoryRequest {
diff --git a/services/mgmt/resourcehealth/src/package_2017_07/models.rs b/services/mgmt/resourcehealth/src/package_2017_07/models.rs
index 3e86d7b011..662a1214fa 100644
--- a/services/mgmt/resourcehealth/src/package_2017_07/models.rs
+++ b/services/mgmt/resourcehealth/src/package_2017_07/models.rs
@@ -117,10 +117,20 @@ pub mod availability_status {
         #[serde(rename = "recentlyResolvedState", default, skip_serializing_if = "Option::is_none")]
         pub recently_resolved_state: Option<properties::RecentlyResolvedState>,
         #[doc = "Lists actions the user can take based on the current availabilityState of the resource."]
-        #[serde(rename = "recommendedActions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "recommendedActions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub recommended_actions: Vec<RecommendedAction>,
         #[doc = "Lists the service impacting events that may be affecting the health of the resource."]
-        #[serde(rename = "serviceImpactingEvents", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "serviceImpactingEvents",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub service_impacting_events: Vec<ServiceImpactingEvent>,
     }
     impl Properties {
@@ -190,10 +200,20 @@ pub struct EmergingIssue {
     #[serde(rename = "refreshTimestamp", default, with = "azure_core::date::rfc3339::option")]
     pub refresh_timestamp: Option<time::OffsetDateTime>,
     #[doc = "The list of emerging issues of banner type."]
-    #[serde(rename = "statusBanners", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusBanners",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_banners: Vec<StatusBanner>,
     #[doc = "The list of emerging issues of active event type."]
-    #[serde(rename = "statusActiveEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusActiveEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_active_events: Vec<StatusActiveEvent>,
 }
 impl EmergingIssue {
@@ -211,7 +231,11 @@ pub struct EmergingIssueImpact {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of impacted regions for corresponding emerging issues."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<ImpactedRegion>,
 }
 impl EmergingIssueImpact {
@@ -223,7 +247,11 @@ impl EmergingIssueImpact {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EmergingIssueListResult {
     #[doc = "The list of emerging issues."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EmergingIssuesGetResult>,
     #[doc = "The link used to get the next page of emerging issues."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -428,7 +456,11 @@ pub struct StatusActiveEvent {
     #[serde(rename = "lastModifiedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_modified_time: Option<time::OffsetDateTime>,
     #[doc = "The list of emerging issues impacts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub impacts: Vec<EmergingIssueImpact>,
 }
 impl StatusActiveEvent {
diff --git a/services/mgmt/resourcehealth/src/package_2018_07_01/models.rs b/services/mgmt/resourcehealth/src/package_2018_07_01/models.rs
index 2a4061bb34..0aa5f83518 100644
--- a/services/mgmt/resourcehealth/src/package_2018_07_01/models.rs
+++ b/services/mgmt/resourcehealth/src/package_2018_07_01/models.rs
@@ -45,7 +45,11 @@ impl MetadataEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetadataEntityListResult {
     #[doc = "The list of metadata entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetadataEntity>,
     #[doc = "The link used to get the next page of metadata."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -69,13 +73,28 @@ pub struct MetadataEntityProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The list of keys on which this entity depends on."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<String>,
     #[doc = "The list of scenarios applicable to this metadata entity."]
-    #[serde(rename = "applicableScenarios", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicableScenarios",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applicable_scenarios: Vec<String>,
     #[doc = "The list of supported values."]
-    #[serde(rename = "supportedValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_values: Vec<MetadataSupportedValueDetail>,
 }
 impl MetadataEntityProperties {
@@ -188,10 +207,20 @@ pub mod availability_status {
         #[serde(rename = "recentlyResolved", default, skip_serializing_if = "Option::is_none")]
         pub recently_resolved: Option<properties::RecentlyResolved>,
         #[doc = "Lists actions the user can take based on the current availabilityState of the resource."]
-        #[serde(rename = "recommendedActions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "recommendedActions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub recommended_actions: Vec<RecommendedAction>,
         #[doc = "Lists the service impacting events that may be affecting the health of the resource."]
-        #[serde(rename = "serviceImpactingEvents", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "serviceImpactingEvents",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub service_impacting_events: Vec<ServiceImpactingEvent>,
     }
     impl Properties {
@@ -326,10 +355,20 @@ pub struct EmergingIssue {
     #[serde(rename = "refreshTimestamp", default, with = "azure_core::date::rfc3339::option")]
     pub refresh_timestamp: Option<time::OffsetDateTime>,
     #[doc = "The list of emerging issues of banner type."]
-    #[serde(rename = "statusBanners", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusBanners",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_banners: Vec<StatusBanner>,
     #[doc = "The list of emerging issues of active event type."]
-    #[serde(rename = "statusActiveEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusActiveEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_active_events: Vec<StatusActiveEvent>,
 }
 impl EmergingIssue {
@@ -347,7 +386,11 @@ pub struct EmergingIssueImpact {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of impacted regions for corresponding emerging issues."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<ImpactedRegion>,
 }
 impl EmergingIssueImpact {
@@ -359,7 +402,11 @@ impl EmergingIssueImpact {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EmergingIssueListResult {
     #[doc = "The list of emerging issues."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EmergingIssuesGetResult>,
     #[doc = "The link used to get the next page of emerging issues."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -437,7 +484,11 @@ pub mod event {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub article: Option<properties::Article>,
         #[doc = "Useful links of event."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub links: Vec<Link>,
         #[doc = "It provides the Timestamp for when the health impacting event started."]
         #[serde(rename = "impactStartTime", default, with = "azure_core::date::rfc3339::option")]
@@ -446,13 +497,21 @@ pub mod event {
         #[serde(rename = "impactMitigationTime", default, with = "azure_core::date::rfc3339::option")]
         pub impact_mitigation_time: Option<time::OffsetDateTime>,
         #[doc = "List services impacted by the service health event."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub impact: Vec<Impact>,
         #[doc = "Recommended actions of event."]
         #[serde(rename = "recommendedActions", default, skip_serializing_if = "Option::is_none")]
         pub recommended_actions: Option<properties::RecommendedActions>,
         #[doc = "Frequently asked questions for the service health event."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub faqs: Vec<Faq>,
         #[doc = "It provides information if the event is High incident rate event or not."]
         #[serde(rename = "isHIR", default, skip_serializing_if = "Option::is_none")]
@@ -703,7 +762,11 @@ pub mod event {
             #[serde(default, skip_serializing_if = "Option::is_none")]
             pub message: Option<String>,
             #[doc = "Recommended actions for the service health event."]
-            #[serde(default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub actions: Vec<serde_json::Value>,
             #[doc = "Recommended action locale for the service health event."]
             #[serde(rename = "localeCode", default, skip_serializing_if = "Option::is_none")]
@@ -761,7 +824,12 @@ pub struct Impact {
     #[serde(rename = "impactedService", default, skip_serializing_if = "Option::is_none")]
     pub impacted_service: Option<String>,
     #[doc = "List regions impacted by the service health event."]
-    #[serde(rename = "impactedRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "impactedRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub impacted_regions: Vec<ImpactedServiceRegion>,
 }
 impl Impact {
@@ -794,13 +862,22 @@ pub struct ImpactedServiceRegion {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<impacted_service_region::Status>,
     #[doc = "List subscription impacted by the service health event."]
-    #[serde(rename = "impactedSubscriptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "impactedSubscriptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub impacted_subscriptions: Vec<String>,
     #[doc = "It provides the Timestamp for when the last update for the service health event."]
     #[serde(rename = "lastUpdateTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_update_time: Option<time::OffsetDateTime>,
     #[doc = "List of updates for given service health event."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub updates: Vec<Update>,
 }
 impl ImpactedServiceRegion {
@@ -1086,7 +1163,11 @@ pub struct StatusActiveEvent {
     #[serde(rename = "lastModifiedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_modified_time: Option<time::OffsetDateTime>,
     #[doc = "The list of emerging issues impacts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub impacts: Vec<EmergingIssueImpact>,
 }
 impl StatusActiveEvent {
diff --git a/services/mgmt/resourcehealth/src/package_2018_08_preview/models.rs b/services/mgmt/resourcehealth/src/package_2018_08_preview/models.rs
index 43efcbe9b0..c493bb5931 100644
--- a/services/mgmt/resourcehealth/src/package_2018_08_preview/models.rs
+++ b/services/mgmt/resourcehealth/src/package_2018_08_preview/models.rs
@@ -45,7 +45,11 @@ impl MetadataEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetadataEntityListResult {
     #[doc = "The list of metadata entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetadataEntity>,
     #[doc = "The link used to get the next page of metadata."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -69,13 +73,28 @@ pub struct MetadataEntityProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The list of keys on which this entity depends on."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<String>,
     #[doc = "The list of scenarios applicable to this metadata entity."]
-    #[serde(rename = "applicableScenarios", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicableScenarios",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applicable_scenarios: Vec<String>,
     #[doc = "The list of supported values."]
-    #[serde(rename = "supportedValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_values: Vec<MetadataSupportedValueDetail>,
 }
 impl MetadataEntityProperties {
@@ -188,10 +207,20 @@ pub mod availability_status {
         #[serde(rename = "recentlyResolved", default, skip_serializing_if = "Option::is_none")]
         pub recently_resolved: Option<properties::RecentlyResolved>,
         #[doc = "Lists actions the user can take based on the current availabilityState of the resource."]
-        #[serde(rename = "recommendedActions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "recommendedActions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub recommended_actions: Vec<RecommendedAction>,
         #[doc = "Lists the service impacting events that may be affecting the health of the resource."]
-        #[serde(rename = "serviceImpactingEvents", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "serviceImpactingEvents",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub service_impacting_events: Vec<ServiceImpactingEvent>,
     }
     impl Properties {
@@ -326,10 +355,20 @@ pub struct EmergingIssue {
     #[serde(rename = "refreshTimestamp", default, with = "azure_core::date::rfc3339::option")]
     pub refresh_timestamp: Option<time::OffsetDateTime>,
     #[doc = "The list of emerging issues of banner type."]
-    #[serde(rename = "statusBanners", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusBanners",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_banners: Vec<StatusBanner>,
     #[doc = "The list of emerging issues of active event type."]
-    #[serde(rename = "statusActiveEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusActiveEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_active_events: Vec<StatusActiveEvent>,
 }
 impl EmergingIssue {
@@ -347,7 +386,11 @@ pub struct EmergingIssueImpact {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of impacted regions for corresponding emerging issues."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<ImpactedRegion>,
 }
 impl EmergingIssueImpact {
@@ -359,7 +402,11 @@ impl EmergingIssueImpact {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EmergingIssueListResult {
     #[doc = "The list of emerging issues."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EmergingIssuesGetResult>,
     #[doc = "The link used to get the next page of emerging issues."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -437,7 +484,11 @@ pub mod event {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub article: Option<properties::Article>,
         #[doc = "Useful links of event."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub links: Vec<Link>,
         #[doc = "It provides the Timestamp for when the health impacting event started."]
         #[serde(rename = "impactStartTime", default, with = "azure_core::date::rfc3339::option")]
@@ -446,13 +497,21 @@ pub mod event {
         #[serde(rename = "impactMitigationTime", default, with = "azure_core::date::rfc3339::option")]
         pub impact_mitigation_time: Option<time::OffsetDateTime>,
         #[doc = "List services impacted by the service health event."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub impact: Vec<Impact>,
         #[doc = "Recommended actions of event."]
         #[serde(rename = "recommendedActions", default, skip_serializing_if = "Option::is_none")]
         pub recommended_actions: Option<properties::RecommendedActions>,
         #[doc = "Frequently asked questions for the service health event."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub faqs: Vec<Faq>,
         #[doc = "It provides information if the event is High incident rate event or not."]
         #[serde(rename = "isHIR", default, skip_serializing_if = "Option::is_none")]
@@ -703,7 +762,11 @@ pub mod event {
             #[serde(default, skip_serializing_if = "Option::is_none")]
             pub message: Option<String>,
             #[doc = "Recommended actions for the service health event."]
-            #[serde(default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub actions: Vec<serde_json::Value>,
             #[doc = "Recommended action locale for the service health event."]
             #[serde(rename = "localeCode", default, skip_serializing_if = "Option::is_none")]
@@ -761,7 +824,12 @@ pub struct Impact {
     #[serde(rename = "impactedService", default, skip_serializing_if = "Option::is_none")]
     pub impacted_service: Option<String>,
     #[doc = "List regions impacted by the service health event."]
-    #[serde(rename = "impactedRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "impactedRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub impacted_regions: Vec<ImpactedServiceRegion>,
 }
 impl Impact {
@@ -938,13 +1006,22 @@ pub struct ImpactedServiceRegion {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<impacted_service_region::Status>,
     #[doc = "List subscription impacted by the service health event."]
-    #[serde(rename = "impactedSubscriptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "impactedSubscriptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub impacted_subscriptions: Vec<String>,
     #[doc = "It provides the Timestamp for when the last update for the service health event."]
     #[serde(rename = "lastUpdateTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_update_time: Option<time::OffsetDateTime>,
     #[doc = "List of updates for given service health event."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub updates: Vec<Update>,
 }
 impl ImpactedServiceRegion {
@@ -1230,7 +1307,11 @@ pub struct StatusActiveEvent {
     #[serde(rename = "lastModifiedTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_modified_time: Option<time::OffsetDateTime>,
     #[doc = "The list of emerging issues impacts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub impacts: Vec<EmergingIssueImpact>,
 }
 impl StatusActiveEvent {
diff --git a/services/mgmt/resourcehealth/src/package_2020_05_01/models.rs b/services/mgmt/resourcehealth/src/package_2020_05_01/models.rs
index df45806f5d..2e6a1695f2 100644
--- a/services/mgmt/resourcehealth/src/package_2020_05_01/models.rs
+++ b/services/mgmt/resourcehealth/src/package_2020_05_01/models.rs
@@ -135,10 +135,20 @@ pub mod availability_status {
         #[serde(rename = "recentlyResolved", default, skip_serializing_if = "Option::is_none")]
         pub recently_resolved: Option<properties::RecentlyResolved>,
         #[doc = "Lists actions the user can take based on the current availabilityState of the resource."]
-        #[serde(rename = "recommendedActions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "recommendedActions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub recommended_actions: Vec<RecommendedAction>,
         #[doc = "Lists the service impacting events that may be affecting the health of the resource."]
-        #[serde(rename = "serviceImpactingEvents", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "serviceImpactingEvents",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub service_impacting_events: Vec<ServiceImpactingEvent>,
     }
     impl Properties {
diff --git a/services/mgmt/resourcehealth/src/package_2020_05_01_preview/models.rs b/services/mgmt/resourcehealth/src/package_2020_05_01_preview/models.rs
index f0410d1ec8..5093af1c03 100644
--- a/services/mgmt/resourcehealth/src/package_2020_05_01_preview/models.rs
+++ b/services/mgmt/resourcehealth/src/package_2020_05_01_preview/models.rs
@@ -135,10 +135,20 @@ pub mod availability_status {
         #[serde(rename = "recentlyResolved", default, skip_serializing_if = "Option::is_none")]
         pub recently_resolved: Option<properties::RecentlyResolved>,
         #[doc = "Lists actions the user can take based on the current availabilityState of the resource."]
-        #[serde(rename = "recommendedActions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "recommendedActions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub recommended_actions: Vec<RecommendedAction>,
         #[doc = "Lists the service impacting events that may be affecting the health of the resource."]
-        #[serde(rename = "serviceImpactingEvents", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "serviceImpactingEvents",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub service_impacting_events: Vec<ServiceImpactingEvent>,
     }
     impl Properties {
@@ -291,7 +301,12 @@ pub struct Impact {
     #[serde(rename = "impactedService", default, skip_serializing_if = "Option::is_none")]
     pub impacted_service: Option<String>,
     #[doc = "List regions impacted by the service health event."]
-    #[serde(rename = "impactedRegions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "impactedRegions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub impacted_regions: Vec<ImpactedServiceRegion>,
 }
 impl Impact {
@@ -462,13 +477,22 @@ pub struct ImpactedServiceRegion {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<impacted_service_region::Status>,
     #[doc = "List subscription impacted by the service health event."]
-    #[serde(rename = "impactedSubscriptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "impactedSubscriptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub impacted_subscriptions: Vec<String>,
     #[doc = "It provides the Timestamp for when the last update for the service health event."]
     #[serde(rename = "lastUpdateTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_update_time: Option<time::OffsetDateTime>,
     #[doc = "List of updates for given service health event."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub updates: Vec<Update>,
 }
 impl ImpactedServiceRegion {
diff --git a/services/mgmt/resourcemover/src/package_2019_10_01_preview/models.rs b/services/mgmt/resourcemover/src/package_2019_10_01_preview/models.rs
index 0aaa009a5c..1e46fceba5 100644
--- a/services/mgmt/resourcemover/src/package_2019_10_01_preview/models.rs
+++ b/services/mgmt/resourcemover/src/package_2019_10_01_preview/models.rs
@@ -13,7 +13,12 @@ pub struct AffectedMoveResource {
     #[serde(rename = "sourceId", default, skip_serializing_if = "Option::is_none")]
     pub source_id: Option<String>,
     #[doc = "The affected move resources."]
-    #[serde(rename = "moveResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "moveResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub move_resources: Vec<AffectedMoveResource>,
 }
 impl AffectedMoveResource {
@@ -73,7 +78,12 @@ pub struct BulkRemoveRequest {
     #[serde(rename = "validateOnly", default, skip_serializing_if = "Option::is_none")]
     pub validate_only: Option<bool>,
     #[doc = "Gets or sets the list of resource Id's, by default it accepts move resource id's unless the input type is switched via moveResourceInputType property."]
-    #[serde(rename = "moveResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "moveResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub move_resources: Vec<String>,
     #[doc = "Defines the move resource input type."]
     #[serde(rename = "moveResourceInputType", default, skip_serializing_if = "Option::is_none")]
@@ -115,7 +125,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -382,10 +396,20 @@ pub struct LoadBalancerResourceSettings {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<String>,
     #[doc = "Gets or sets the frontend IP configurations of the load balancer."]
-    #[serde(rename = "frontendIPConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendIPConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_ip_configurations: Vec<LbFrontendIpConfigurationResourceSettings>,
     #[doc = "Gets or sets the backend address pools of the load balancer."]
-    #[serde(rename = "backendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_address_pools: Vec<LbBackendAddressPoolResourceSettings>,
     #[doc = "Gets or sets the csv list of zones common for all frontend IP configurations. Note this is given\r\n precedence only if frontend IP configurations settings are not present."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -477,7 +501,11 @@ impl MoveCollectionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MoveCollectionResultList {
     #[doc = "Gets the list of move collections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MoveCollection>,
     #[doc = "Gets the value of  next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -498,7 +526,12 @@ impl MoveCollectionResultList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MoveErrorInfo {
     #[doc = "The affected move resources."]
-    #[serde(rename = "moveResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "moveResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub move_resources: Vec<AffectedMoveResource>,
 }
 impl MoveErrorInfo {
@@ -531,7 +564,11 @@ impl MoveResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MoveResourceCollection {
     #[doc = "Gets the list of move resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MoveResource>,
     #[doc = "Gets the value of  next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -624,7 +661,11 @@ pub struct MoveResourceErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<MoveResourceErrorBody>,
 }
 impl MoveResourceErrorBody {
@@ -716,10 +757,20 @@ pub struct MoveResourceProperties {
     #[serde(rename = "moveStatus", default, skip_serializing_if = "Option::is_none")]
     pub move_status: Option<serde_json::Value>,
     #[doc = "Gets or sets the move resource dependencies."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<MoveResourceDependency>,
     #[doc = "Gets or sets the move resource dependencies overrides."]
-    #[serde(rename = "dependsOnOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOnOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on_overrides: Vec<MoveResourceDependencyOverride>,
     #[doc = "Gets a value indicating whether the resolve action is required over the move collection."]
     #[serde(rename = "isResolveRequired", default, skip_serializing_if = "Option::is_none")]
@@ -832,7 +883,12 @@ pub struct NetworkInterfaceResourceSettings {
     #[serde(flatten)]
     pub resource_settings: ResourceSettings,
     #[doc = "Gets or sets the IP configurations of the NIC."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<NicIpConfigurationResourceSettings>,
     #[doc = "Gets or sets a value indicating whether accelerated networking is enabled."]
     #[serde(rename = "enableAcceleratedNetworking", default, skip_serializing_if = "Option::is_none")]
@@ -853,7 +909,12 @@ pub struct NetworkSecurityGroupResourceSettings {
     #[serde(flatten)]
     pub resource_settings: ResourceSettings,
     #[doc = "Gets or sets Security rules of network security group."]
-    #[serde(rename = "securityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_rules: Vec<NsgSecurityRule>,
 }
 impl NetworkSecurityGroupResourceSettings {
@@ -883,10 +944,20 @@ pub struct NicIpConfigurationResourceSettings {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub primary: Option<bool>,
     #[doc = "Gets or sets the references of the load balancer backend address pools."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<LoadBalancerBackendAddressPoolReference>,
     #[doc = "Gets or sets the references of the load balancer NAT rules."]
-    #[serde(rename = "loadBalancerNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_nat_rules: Vec<LoadBalancerNatRuleReference>,
     #[doc = "Defines reference to a public IP."]
     #[serde(rename = "publicIp", default, skip_serializing_if = "Option::is_none")]
@@ -1002,10 +1073,19 @@ pub struct OperationStatusError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<OperationStatusError>,
     #[doc = "The additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<OperationErrorAdditionalInfo>,
 }
 impl OperationStatusError {
@@ -1049,7 +1129,11 @@ impl OperationsDiscovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsDiscoveryCollection {
     #[doc = "Gets or sets the ClientDiscovery details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDiscovery>,
     #[doc = "Gets or sets the value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1196,7 +1280,12 @@ impl PublicIpReference {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RequiredForResourcesCollection {
     #[doc = "Gets or sets the list of source Ids for which the input resource is required."]
-    #[serde(rename = "sourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ids: Vec<String>,
 }
 impl RequiredForResourcesCollection {
@@ -1427,7 +1516,11 @@ pub struct SummaryCollection {
     #[serde(rename = "fieldName", default, skip_serializing_if = "Option::is_none")]
     pub field_name: Option<String>,
     #[doc = "Gets or sets the list of summary items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub summary: Vec<Summary>,
 }
 impl SummaryCollection {
@@ -1476,7 +1569,11 @@ impl UnresolvedDependency {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UnresolvedDependencyCollection {
     #[doc = "Gets or sets the list of unresolved dependencies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UnresolvedDependency>,
     #[doc = "Gets or sets the value of  next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1596,13 +1693,27 @@ pub struct VirtualNetworkResourceSettings {
     #[serde(rename = "enableDdosProtection", default, skip_serializing_if = "Option::is_none")]
     pub enable_ddos_protection: Option<bool>,
     #[doc = "Gets or sets the address prefixes for the virtual network."]
-    #[serde(rename = "addressSpace", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressSpace",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_space: Vec<String>,
     #[doc = "Gets or sets DHCPOptions that contains an array of DNS servers available to VMs\r\ndeployed in the virtual network."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
     #[doc = "Gets or sets List of subnets in a VirtualNetwork."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<SubnetResourceSettings>,
 }
 impl VirtualNetworkResourceSettings {
diff --git a/services/mgmt/resourcemover/src/package_2021_01_01/models.rs b/services/mgmt/resourcemover/src/package_2021_01_01/models.rs
index 0aaa009a5c..1e46fceba5 100644
--- a/services/mgmt/resourcemover/src/package_2021_01_01/models.rs
+++ b/services/mgmt/resourcemover/src/package_2021_01_01/models.rs
@@ -13,7 +13,12 @@ pub struct AffectedMoveResource {
     #[serde(rename = "sourceId", default, skip_serializing_if = "Option::is_none")]
     pub source_id: Option<String>,
     #[doc = "The affected move resources."]
-    #[serde(rename = "moveResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "moveResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub move_resources: Vec<AffectedMoveResource>,
 }
 impl AffectedMoveResource {
@@ -73,7 +78,12 @@ pub struct BulkRemoveRequest {
     #[serde(rename = "validateOnly", default, skip_serializing_if = "Option::is_none")]
     pub validate_only: Option<bool>,
     #[doc = "Gets or sets the list of resource Id's, by default it accepts move resource id's unless the input type is switched via moveResourceInputType property."]
-    #[serde(rename = "moveResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "moveResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub move_resources: Vec<String>,
     #[doc = "Defines the move resource input type."]
     #[serde(rename = "moveResourceInputType", default, skip_serializing_if = "Option::is_none")]
@@ -115,7 +125,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -382,10 +396,20 @@ pub struct LoadBalancerResourceSettings {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<String>,
     #[doc = "Gets or sets the frontend IP configurations of the load balancer."]
-    #[serde(rename = "frontendIPConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendIPConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_ip_configurations: Vec<LbFrontendIpConfigurationResourceSettings>,
     #[doc = "Gets or sets the backend address pools of the load balancer."]
-    #[serde(rename = "backendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_address_pools: Vec<LbBackendAddressPoolResourceSettings>,
     #[doc = "Gets or sets the csv list of zones common for all frontend IP configurations. Note this is given\r\n precedence only if frontend IP configurations settings are not present."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -477,7 +501,11 @@ impl MoveCollectionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MoveCollectionResultList {
     #[doc = "Gets the list of move collections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MoveCollection>,
     #[doc = "Gets the value of  next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -498,7 +526,12 @@ impl MoveCollectionResultList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MoveErrorInfo {
     #[doc = "The affected move resources."]
-    #[serde(rename = "moveResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "moveResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub move_resources: Vec<AffectedMoveResource>,
 }
 impl MoveErrorInfo {
@@ -531,7 +564,11 @@ impl MoveResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MoveResourceCollection {
     #[doc = "Gets the list of move resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MoveResource>,
     #[doc = "Gets the value of  next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -624,7 +661,11 @@ pub struct MoveResourceErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<MoveResourceErrorBody>,
 }
 impl MoveResourceErrorBody {
@@ -716,10 +757,20 @@ pub struct MoveResourceProperties {
     #[serde(rename = "moveStatus", default, skip_serializing_if = "Option::is_none")]
     pub move_status: Option<serde_json::Value>,
     #[doc = "Gets or sets the move resource dependencies."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<MoveResourceDependency>,
     #[doc = "Gets or sets the move resource dependencies overrides."]
-    #[serde(rename = "dependsOnOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOnOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on_overrides: Vec<MoveResourceDependencyOverride>,
     #[doc = "Gets a value indicating whether the resolve action is required over the move collection."]
     #[serde(rename = "isResolveRequired", default, skip_serializing_if = "Option::is_none")]
@@ -832,7 +883,12 @@ pub struct NetworkInterfaceResourceSettings {
     #[serde(flatten)]
     pub resource_settings: ResourceSettings,
     #[doc = "Gets or sets the IP configurations of the NIC."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<NicIpConfigurationResourceSettings>,
     #[doc = "Gets or sets a value indicating whether accelerated networking is enabled."]
     #[serde(rename = "enableAcceleratedNetworking", default, skip_serializing_if = "Option::is_none")]
@@ -853,7 +909,12 @@ pub struct NetworkSecurityGroupResourceSettings {
     #[serde(flatten)]
     pub resource_settings: ResourceSettings,
     #[doc = "Gets or sets Security rules of network security group."]
-    #[serde(rename = "securityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_rules: Vec<NsgSecurityRule>,
 }
 impl NetworkSecurityGroupResourceSettings {
@@ -883,10 +944,20 @@ pub struct NicIpConfigurationResourceSettings {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub primary: Option<bool>,
     #[doc = "Gets or sets the references of the load balancer backend address pools."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<LoadBalancerBackendAddressPoolReference>,
     #[doc = "Gets or sets the references of the load balancer NAT rules."]
-    #[serde(rename = "loadBalancerNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_nat_rules: Vec<LoadBalancerNatRuleReference>,
     #[doc = "Defines reference to a public IP."]
     #[serde(rename = "publicIp", default, skip_serializing_if = "Option::is_none")]
@@ -1002,10 +1073,19 @@ pub struct OperationStatusError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<OperationStatusError>,
     #[doc = "The additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<OperationErrorAdditionalInfo>,
 }
 impl OperationStatusError {
@@ -1049,7 +1129,11 @@ impl OperationsDiscovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsDiscoveryCollection {
     #[doc = "Gets or sets the ClientDiscovery details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDiscovery>,
     #[doc = "Gets or sets the value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1196,7 +1280,12 @@ impl PublicIpReference {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RequiredForResourcesCollection {
     #[doc = "Gets or sets the list of source Ids for which the input resource is required."]
-    #[serde(rename = "sourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ids: Vec<String>,
 }
 impl RequiredForResourcesCollection {
@@ -1427,7 +1516,11 @@ pub struct SummaryCollection {
     #[serde(rename = "fieldName", default, skip_serializing_if = "Option::is_none")]
     pub field_name: Option<String>,
     #[doc = "Gets or sets the list of summary items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub summary: Vec<Summary>,
 }
 impl SummaryCollection {
@@ -1476,7 +1569,11 @@ impl UnresolvedDependency {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UnresolvedDependencyCollection {
     #[doc = "Gets or sets the list of unresolved dependencies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UnresolvedDependency>,
     #[doc = "Gets or sets the value of  next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1596,13 +1693,27 @@ pub struct VirtualNetworkResourceSettings {
     #[serde(rename = "enableDdosProtection", default, skip_serializing_if = "Option::is_none")]
     pub enable_ddos_protection: Option<bool>,
     #[doc = "Gets or sets the address prefixes for the virtual network."]
-    #[serde(rename = "addressSpace", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressSpace",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_space: Vec<String>,
     #[doc = "Gets or sets DHCPOptions that contains an array of DNS servers available to VMs\r\ndeployed in the virtual network."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
     #[doc = "Gets or sets List of subnets in a VirtualNetwork."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<SubnetResourceSettings>,
 }
 impl VirtualNetworkResourceSettings {
diff --git a/services/mgmt/resourcemover/src/package_2021_08_01/models.rs b/services/mgmt/resourcemover/src/package_2021_08_01/models.rs
index 907e74ebec..5e8f212382 100644
--- a/services/mgmt/resourcemover/src/package_2021_08_01/models.rs
+++ b/services/mgmt/resourcemover/src/package_2021_08_01/models.rs
@@ -13,7 +13,12 @@ pub struct AffectedMoveResource {
     #[serde(rename = "sourceId", default, skip_serializing_if = "Option::is_none")]
     pub source_id: Option<String>,
     #[doc = "The affected move resources."]
-    #[serde(rename = "moveResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "moveResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub move_resources: Vec<AffectedMoveResource>,
 }
 impl AffectedMoveResource {
@@ -77,7 +82,12 @@ pub struct BulkRemoveRequest {
     #[serde(rename = "validateOnly", default, skip_serializing_if = "Option::is_none")]
     pub validate_only: Option<bool>,
     #[doc = "Gets or sets the list of resource Id's, by default it accepts move resource id's unless the input type is switched via moveResourceInputType property."]
-    #[serde(rename = "moveResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "moveResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub move_resources: Vec<String>,
     #[doc = "Defines the move resource input type."]
     #[serde(rename = "moveResourceInputType", default, skip_serializing_if = "Option::is_none")]
@@ -119,7 +129,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -389,10 +403,20 @@ pub struct LoadBalancerResourceSettings {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<String>,
     #[doc = "Gets or sets the frontend IP configurations of the load balancer."]
-    #[serde(rename = "frontendIPConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendIPConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_ip_configurations: Vec<LbFrontendIpConfigurationResourceSettings>,
     #[doc = "Gets or sets the backend address pools of the load balancer."]
-    #[serde(rename = "backendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backend_address_pools: Vec<LbBackendAddressPoolResourceSettings>,
     #[doc = "Gets or sets the csv list of zones common for all frontend IP configurations. Note this is given\r\n precedence only if frontend IP configurations settings are not present."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -488,7 +512,11 @@ impl MoveCollectionProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MoveCollectionResultList {
     #[doc = "Gets the list of move collections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MoveCollection>,
     #[doc = "Gets the value of  next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -509,7 +537,12 @@ impl MoveCollectionResultList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MoveErrorInfo {
     #[doc = "The affected move resources."]
-    #[serde(rename = "moveResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "moveResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub move_resources: Vec<AffectedMoveResource>,
 }
 impl MoveErrorInfo {
@@ -545,7 +578,11 @@ impl MoveResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MoveResourceCollection {
     #[doc = "Gets the list of move resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MoveResource>,
     #[doc = "Gets the value of  next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -638,7 +675,11 @@ pub struct MoveResourceErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<MoveResourceErrorBody>,
 }
 impl MoveResourceErrorBody {
@@ -730,10 +771,20 @@ pub struct MoveResourceProperties {
     #[serde(rename = "moveStatus", default, skip_serializing_if = "Option::is_none")]
     pub move_status: Option<serde_json::Value>,
     #[doc = "Gets or sets the move resource dependencies."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<MoveResourceDependency>,
     #[doc = "Gets or sets the move resource dependencies overrides."]
-    #[serde(rename = "dependsOnOverrides", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOnOverrides",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on_overrides: Vec<MoveResourceDependencyOverride>,
     #[doc = "Gets a value indicating whether the resolve action is required over the move collection."]
     #[serde(rename = "isResolveRequired", default, skip_serializing_if = "Option::is_none")]
@@ -849,7 +900,12 @@ pub struct NetworkInterfaceResourceSettings {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<serde_json::Value>,
     #[doc = "Gets or sets the IP configurations of the NIC."]
-    #[serde(rename = "ipConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_configurations: Vec<NicIpConfigurationResourceSettings>,
     #[doc = "Gets or sets a value indicating whether accelerated networking is enabled."]
     #[serde(rename = "enableAcceleratedNetworking", default, skip_serializing_if = "Option::is_none")]
@@ -874,7 +930,12 @@ pub struct NetworkSecurityGroupResourceSettings {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<serde_json::Value>,
     #[doc = "Gets or sets Security rules of network security group."]
-    #[serde(rename = "securityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "securityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub security_rules: Vec<NsgSecurityRule>,
 }
 impl NetworkSecurityGroupResourceSettings {
@@ -905,10 +966,20 @@ pub struct NicIpConfigurationResourceSettings {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub primary: Option<bool>,
     #[doc = "Gets or sets the references of the load balancer backend address pools."]
-    #[serde(rename = "loadBalancerBackendAddressPools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerBackendAddressPools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_backend_address_pools: Vec<LoadBalancerBackendAddressPoolReference>,
     #[doc = "Gets or sets the references of the load balancer NAT rules."]
-    #[serde(rename = "loadBalancerNatRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerNatRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_nat_rules: Vec<LoadBalancerNatRuleReference>,
     #[doc = "Defines reference to a public IP."]
     #[serde(rename = "publicIp", default, skip_serializing_if = "Option::is_none")]
@@ -1024,10 +1095,19 @@ pub struct OperationStatusError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<OperationStatusError>,
     #[doc = "The additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<OperationErrorAdditionalInfo>,
 }
 impl OperationStatusError {
@@ -1071,7 +1151,11 @@ impl OperationsDiscovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsDiscoveryCollection {
     #[doc = "Gets or sets the ClientDiscovery details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDiscovery>,
     #[doc = "Gets or sets the value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1222,7 +1306,12 @@ impl PublicIpReference {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RequiredForResourcesCollection {
     #[doc = "Gets or sets the list of source Ids for which the input resource is required."]
-    #[serde(rename = "sourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_ids: Vec<String>,
 }
 impl RequiredForResourcesCollection {
@@ -1461,7 +1550,11 @@ pub struct SummaryCollection {
     #[serde(rename = "fieldName", default, skip_serializing_if = "Option::is_none")]
     pub field_name: Option<String>,
     #[doc = "Gets or sets the list of summary items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub summary: Vec<Summary>,
 }
 impl SummaryCollection {
@@ -1510,7 +1603,11 @@ impl UnresolvedDependency {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UnresolvedDependencyCollection {
     #[doc = "Gets or sets the list of unresolved dependencies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UnresolvedDependency>,
     #[doc = "Gets or sets the value of  next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1557,7 +1654,12 @@ pub struct VirtualMachineResourceSettings {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<serde_json::Value>,
     #[doc = "Gets or sets user-managed identities"]
-    #[serde(rename = "userManagedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userManagedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_managed_identities: Vec<String>,
     #[doc = "Gets or sets the target availability zone."]
     #[serde(rename = "targetAvailabilityZone", default, skip_serializing_if = "Option::is_none")]
@@ -1641,13 +1743,27 @@ pub struct VirtualNetworkResourceSettings {
     #[serde(rename = "enableDdosProtection", default, skip_serializing_if = "Option::is_none")]
     pub enable_ddos_protection: Option<bool>,
     #[doc = "Gets or sets the address prefixes for the virtual network."]
-    #[serde(rename = "addressSpace", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addressSpace",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub address_space: Vec<String>,
     #[doc = "Gets or sets DHCPOptions that contains an array of DNS servers available to VMs\r\ndeployed in the virtual network."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
     #[doc = "Gets or sets List of subnets in a VirtualNetwork."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<SubnetResourceSettings>,
 }
 impl VirtualNetworkResourceSettings {
diff --git a/services/mgmt/resources/src/package_features_2021_07/models.rs b/services/mgmt/resources/src/package_features_2021_07/models.rs
index d725249eac..1fc8a28290 100644
--- a/services/mgmt/resources/src/package_features_2021_07/models.rs
+++ b/services/mgmt/resources/src/package_features_2021_07/models.rs
@@ -37,7 +37,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -67,7 +71,11 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FeatureOperationsListResult {
     #[doc = "The array of features."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FeatureResult>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -157,7 +165,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Microsoft.Features operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -354,7 +366,11 @@ pub struct SubscriptionFeatureRegistrationList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of subscription feature registrations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionFeatureRegistration>,
 }
 impl azure_core::Continuable for SubscriptionFeatureRegistrationList {
diff --git a/services/mgmt/resources/src/package_locks_2020_05/models.rs b/services/mgmt/resources/src/package_locks_2020_05/models.rs
index 7906a636c3..a3ff255bd6 100644
--- a/services/mgmt/resources/src/package_locks_2020_05/models.rs
+++ b/services/mgmt/resources/src/package_locks_2020_05/models.rs
@@ -31,10 +31,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -64,7 +73,11 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagementLockListResult {
     #[doc = "The list of locks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagementLockObject>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -131,7 +144,11 @@ pub struct ManagementLockProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub notes: Option<String>,
     #[doc = "The owners of the lock."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub owners: Vec<ManagementLockOwner>,
 }
 impl ManagementLockProperties {
@@ -225,7 +242,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Microsoft.Authorization operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/resources/src/package_policy_2021_06/models.rs b/services/mgmt/resources/src/package_policy_2021_06/models.rs
index 87d112c093..ad9137b473 100644
--- a/services/mgmt/resources/src/package_policy_2021_06/models.rs
+++ b/services/mgmt/resources/src/package_policy_2021_06/models.rs
@@ -10,7 +10,11 @@ pub struct Alias {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The paths for an alias."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<AliasPath>,
     #[doc = "The type of the alias."]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
@@ -46,7 +50,12 @@ pub struct AliasPath {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "The API versions."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "The type of the pattern for an alias path."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -232,7 +241,12 @@ pub struct DataManifestCustomResourceFunctionDefinition {
     #[serde(rename = "fullyQualifiedResourceType", default, skip_serializing_if = "Option::is_none")]
     pub fully_qualified_resource_type: Option<String>,
     #[doc = "The top-level properties that can be selected on the function's output. eg - [ \"name\", \"location\" ] if vault().name and vault().location are supported"]
-    #[serde(rename = "defaultProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_properties: Vec<String>,
     #[doc = "A value indicating whether the custom properties within the property bag are allowed. Needs api-version to be specified in the policy rule eg - vault('2019-06-01')."]
     #[serde(rename = "allowCustomProperties", default, skip_serializing_if = "Option::is_none")]
@@ -247,10 +261,18 @@ impl DataManifestCustomResourceFunctionDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataManifestResourceFunctionsDefinition {
     #[doc = "The standard resource functions (subscription and/or resourceGroup)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub standard: Vec<String>,
     #[doc = "An array of data manifest custom resource definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom: Vec<DataManifestCustomResourceFunctionDefinition>,
 }
 impl DataManifestResourceFunctionsDefinition {
@@ -283,7 +305,11 @@ impl DataPolicyManifest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataPolicyManifestListResult {
     #[doc = "An array of data policy manifests."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataPolicyManifest>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -304,7 +330,11 @@ impl DataPolicyManifestListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataPolicyManifestProperties {
     #[doc = "The list of namespaces for the data policy manifest."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub namespaces: Vec<String>,
     #[doc = "The policy mode of the data policy manifest."]
     #[serde(rename = "policyMode", default, skip_serializing_if = "Option::is_none")]
@@ -313,13 +343,27 @@ pub struct DataPolicyManifestProperties {
     #[serde(rename = "isBuiltInOnly", default, skip_serializing_if = "Option::is_none")]
     pub is_built_in_only: Option<bool>,
     #[doc = "An array of resource type aliases."]
-    #[serde(rename = "resourceTypeAliases", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypeAliases",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_type_aliases: Vec<ResourceTypeAliases>,
     #[doc = "The effect definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub effects: Vec<DataEffect>,
     #[doc = "The non-alias field accessor values that can be used in the policy rule."]
-    #[serde(rename = "fieldValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_values: Vec<String>,
     #[doc = "The resource functions supported by a manifest"]
     #[serde(rename = "resourceFunctions", default, skip_serializing_if = "Option::is_none")]
@@ -358,10 +402,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -432,7 +485,12 @@ pub struct ParameterDefinitionsValue {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<parameter_definitions_value::Type>,
     #[doc = "The allowed values for the parameter."]
-    #[serde(rename = "allowedValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_values: Vec<serde_json::Value>,
     #[doc = "The default value for the parameter if no value is provided."]
     #[serde(rename = "defaultValue", default, skip_serializing_if = "Option::is_none")]
@@ -571,7 +629,11 @@ impl PolicyAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyAssignmentListResult {
     #[doc = "An array of policy assignments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyAssignment>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -601,7 +663,12 @@ pub struct PolicyAssignmentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub scope: Option<String>,
     #[doc = "The policy's excluded scopes."]
-    #[serde(rename = "notScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_scopes: Vec<String>,
     #[doc = "The parameter values for the policy rule. The keys are the parameter names."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -616,7 +683,12 @@ pub struct PolicyAssignmentProperties {
     #[serde(rename = "enforcementMode", default, skip_serializing_if = "Option::is_none")]
     pub enforcement_mode: Option<policy_assignment_properties::EnforcementMode>,
     #[doc = "The messages that describe why a resource is non-compliant with the policy."]
-    #[serde(rename = "nonComplianceMessages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nonComplianceMessages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub non_compliance_messages: Vec<NonComplianceMessage>,
 }
 impl PolicyAssignmentProperties {
@@ -740,7 +812,11 @@ impl PolicyDefinitionGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyDefinitionListResult {
     #[doc = "An array of policy definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -844,7 +920,12 @@ pub struct PolicyDefinitionReference {
     #[serde(rename = "policyDefinitionReferenceId", default, skip_serializing_if = "Option::is_none")]
     pub policy_definition_reference_id: Option<String>,
     #[doc = "The name of the groups that this policy definition reference belongs to."]
-    #[serde(rename = "groupNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_names: Vec<String>,
 }
 impl PolicyDefinitionReference {
@@ -890,7 +971,11 @@ impl PolicyExemption {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicyExemptionListResult {
     #[doc = "An array of policy exemptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicyExemption>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -914,7 +999,12 @@ pub struct PolicyExemptionProperties {
     #[serde(rename = "policyAssignmentId")]
     pub policy_assignment_id: String,
     #[doc = "The policy definition reference ID list when the associated policy assignment is an assignment of a policy set definition."]
-    #[serde(rename = "policyDefinitionReferenceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitionReferenceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definition_reference_ids: Vec<String>,
     #[doc = "The policy exemption category. Possible values are Waiver and Mitigated."]
     #[serde(rename = "exemptionCategory")]
@@ -1013,7 +1103,11 @@ impl PolicySetDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PolicySetDefinitionListResult {
     #[doc = "An array of policy set definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PolicySetDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1052,7 +1146,12 @@ pub struct PolicySetDefinitionProperties {
     #[serde(rename = "policyDefinitions")]
     pub policy_definitions: Vec<PolicyDefinitionReference>,
     #[doc = "The metadata describing groups of policy definition references within the policy set definition."]
-    #[serde(rename = "policyDefinitionGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "policyDefinitionGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policy_definition_groups: Vec<PolicyDefinitionGroup>,
 }
 impl PolicySetDefinitionProperties {
@@ -1168,7 +1267,11 @@ pub struct ResourceTypeAliases {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "The aliases for property names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aliases: Vec<Alias>,
 }
 impl ResourceTypeAliases {
@@ -1209,7 +1312,11 @@ impl Variable {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VariableListResult {
     #[doc = "An array of variables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Variable>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1259,7 +1366,11 @@ impl VariableValue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VariableValueListResult {
     #[doc = "An array of variable values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VariableValue>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/resources/src/package_resources_2021_04/models.rs b/services/mgmt/resources/src/package_resources_2021_04/models.rs
index 5b7d021a39..d3ba046d34 100644
--- a/services/mgmt/resources/src/package_resources_2021_04/models.rs
+++ b/services/mgmt/resources/src/package_resources_2021_04/models.rs
@@ -10,7 +10,11 @@ pub struct Alias {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The paths for an alias."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<AliasPath>,
     #[doc = "The type of the alias."]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
@@ -46,7 +50,12 @@ pub struct AliasPath {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub path: Option<String>,
     #[doc = "The API versions."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "The type of the pattern for an alias path."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -255,7 +264,12 @@ impl DebugSetting {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Dependency {
     #[doc = "The list of dependencies."]
-    #[serde(rename = "dependsOn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dependsOn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub depends_on: Vec<BasicDependency>,
     #[doc = "The ID of the dependency."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -348,7 +362,11 @@ impl DeploymentExtendedFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeploymentListResult {
     #[doc = "An array of deployments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeploymentExtended>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -443,7 +461,11 @@ pub mod deployment_operation_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeploymentOperationsListResult {
     #[doc = "An array of deployment operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeploymentOperation>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -529,10 +551,18 @@ pub struct DeploymentPropertiesExtended {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub outputs: Option<serde_json::Value>,
     #[doc = "The list of resource providers needed for the deployment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub providers: Vec<Provider>,
     #[doc = "The list of deployment dependencies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dependencies: Vec<Dependency>,
     #[doc = "Entity representing the reference to the template."]
     #[serde(rename = "templateLink", default, skip_serializing_if = "Option::is_none")]
@@ -556,10 +586,20 @@ pub struct DeploymentPropertiesExtended {
     #[serde(rename = "templateHash", default, skip_serializing_if = "Option::is_none")]
     pub template_hash: Option<String>,
     #[doc = "Array of provisioned resources."]
-    #[serde(rename = "outputResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_resources: Vec<ResourceReference>,
     #[doc = "Array of validated resources."]
-    #[serde(rename = "validatedResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validatedResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validated_resources: Vec<ResourceReference>,
     #[doc = "Common error response for all Azure Resource Manager APIs to return error details for failed operations. (This also follows the OData error response format.)"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -734,10 +774,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -749,7 +798,11 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExportTemplateRequest {
     #[doc = "The IDs of the resources to filter the export by. To export all resources, supply an array with single entry '*'."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
     #[doc = "The export template options. A CSV-formatted list containing zero or more of the following: 'IncludeParameterDefaultValue', 'IncludeComments', 'SkipResourceNameParameterization', 'SkipAllParameterization'"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1073,7 +1126,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Microsoft.Resources operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1111,16 +1168,35 @@ impl ParametersLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permission {
     #[doc = "Allowed actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Denied actions."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<String>,
     #[doc = "Allowed Data actions."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<String>,
     #[doc = "Denied Data actions."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<String>,
 }
 impl Permission {
@@ -1168,7 +1244,12 @@ pub struct Provider {
     #[serde(rename = "registrationPolicy", default, skip_serializing_if = "Option::is_none")]
     pub registration_policy: Option<String>,
     #[doc = "The collection of provider resource types."]
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<ProviderResourceType>,
     #[doc = "The provider authorization consent state."]
     #[serde(rename = "providerAuthorizationConsentState", default, skip_serializing_if = "Option::is_none")]
@@ -1245,7 +1326,12 @@ pub struct ProviderExtendedLocation {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The extended locations for the azure location."]
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<String>,
 }
 impl ProviderExtendedLocation {
@@ -1257,7 +1343,11 @@ impl ProviderExtendedLocation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderListResult {
     #[doc = "An array of resource providers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Provider>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1343,7 +1433,11 @@ pub mod provider_permission {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderPermissionListResult {
     #[doc = "An array of provider permissions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderPermission>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1373,24 +1467,52 @@ pub struct ProviderResourceType {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "The collection of locations where this resource type can be created."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The location mappings that are supported by this resource type."]
-    #[serde(rename = "locationMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_mappings: Vec<ProviderExtendedLocation>,
     #[doc = "The aliases that are supported by this resource type."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aliases: Vec<Alias>,
     #[doc = "The API version."]
-    #[serde(rename = "apiVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_versions: Vec<String>,
     #[doc = "The default API version."]
     #[serde(rename = "defaultApiVersion", default, skip_serializing_if = "Option::is_none")]
     pub default_api_version: Option<String>,
-    #[serde(rename = "zoneMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_mappings: Vec<ZoneMapping>,
     #[doc = "The API profiles for the resource provider."]
-    #[serde(rename = "apiProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "apiProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub api_profiles: Vec<ApiProfile>,
     #[doc = "The additional capabilities offered by this resource type."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1408,7 +1530,11 @@ impl ProviderResourceType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderResourceTypeListResult {
     #[doc = "An array of resource types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderResourceType>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1517,7 +1643,11 @@ impl ResourceGroupFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceGroupListResult {
     #[doc = "An array of resource groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceGroup>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1571,7 +1701,11 @@ impl ResourceGroupProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceListResult {
     #[doc = "An array of resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GenericResourceExpanded>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1628,7 +1762,11 @@ impl ResourceReference {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourcesMoveInfo {
     #[doc = "The IDs of the resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
     #[doc = "The target resource group."]
     #[serde(rename = "targetResourceGroup", default, skip_serializing_if = "Option::is_none")]
@@ -1652,10 +1790,18 @@ pub struct RoleDefinition {
     #[serde(rename = "isServiceRole", default, skip_serializing_if = "Option::is_none")]
     pub is_service_role: Option<bool>,
     #[doc = "Role definition permissions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<Permission>,
     #[doc = "Role definition assignable scopes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl RoleDefinition {
@@ -1778,7 +1924,11 @@ pub struct TagDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub count: Option<TagCount>,
     #[doc = "The list of tag values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<TagValue>,
 }
 impl TagDetails {
@@ -1819,7 +1969,11 @@ impl Tags {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TagsListResult {
     #[doc = "An array of tags."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TagDetails>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1994,7 +2148,11 @@ pub struct WhatIfChange {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub after: Option<serde_json::Value>,
     #[doc = "The predicted changes to resource properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delta: Vec<WhatIfPropertyChange>,
 }
 impl WhatIfChange {
@@ -2027,7 +2185,11 @@ pub mod what_if_change {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WhatIfOperationProperties {
     #[doc = "List of resource changes predicted by What-If operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub changes: Vec<WhatIfChange>,
 }
 impl WhatIfOperationProperties {
@@ -2068,7 +2230,11 @@ pub struct WhatIfPropertyChange {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub after: Option<serde_json::Value>,
     #[doc = "Nested property changes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<WhatIfPropertyChange>,
 }
 impl WhatIfPropertyChange {
@@ -2099,7 +2265,11 @@ pub struct ZoneMapping {
     #[doc = "The location of the zone mapping."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ZoneMapping {
diff --git a/services/mgmt/resources/src/package_subscriptions_2021_01/models.rs b/services/mgmt/resources/src/package_subscriptions_2021_01/models.rs
index 65c1289bb8..303cc00d48 100644
--- a/services/mgmt/resources/src/package_subscriptions_2021_01/models.rs
+++ b/services/mgmt/resources/src/package_subscriptions_2021_01/models.rs
@@ -10,7 +10,11 @@ pub struct AvailabilityZonePeers {
     #[serde(rename = "availabilityZone", default, skip_serializing_if = "Option::is_none")]
     pub availability_zone: Option<String>,
     #[doc = "Details of shared availability zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub peers: Vec<Peers>,
 }
 impl AvailabilityZonePeers {
@@ -83,7 +87,12 @@ pub struct CheckZonePeersRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "The peer Microsoft Azure subscription ID."]
-    #[serde(rename = "subscriptionIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subscriptionIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscription_ids: Vec<String>,
 }
 impl CheckZonePeersRequest {
@@ -101,7 +110,12 @@ pub struct CheckZonePeersResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "The Availability Zones shared by the subscriptions."]
-    #[serde(rename = "availabilityZonePeers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilityZonePeers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_zone_peers: Vec<AvailabilityZonePeers>,
 }
 impl CheckZonePeersResult {
@@ -155,10 +169,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -179,10 +202,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -233,7 +265,11 @@ pub mod location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocationListResult {
     #[doc = "An array of locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Location>,
 }
 impl azure_core::Continuable for LocationListResult {
@@ -269,7 +305,12 @@ pub struct LocationMetadata {
     #[serde(rename = "physicalLocation", default, skip_serializing_if = "Option::is_none")]
     pub physical_location: Option<String>,
     #[doc = "The regions paired to this region."]
-    #[serde(rename = "pairedRegion", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pairedRegion",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paired_region: Vec<PairedRegion>,
     #[doc = "The home location of an edge zone."]
     #[serde(rename = "homeLocation", default, skip_serializing_if = "Option::is_none")]
@@ -414,7 +455,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Microsoft.Resources operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -497,7 +542,12 @@ pub struct Subscription {
     #[serde(rename = "authorizationSource", default, skip_serializing_if = "Option::is_none")]
     pub authorization_source: Option<String>,
     #[doc = "An array containing the tenants managing the subscription."]
-    #[serde(rename = "managedByTenants", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedByTenants",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_by_tenants: Vec<ManagedByTenant>,
     #[doc = "The tags attached to the subscription."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -524,7 +574,11 @@ pub mod subscription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct SubscriptionListResult {
     #[doc = "An array of subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Subscription>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink")]
@@ -598,7 +652,11 @@ pub struct TenantIdDescription {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The list of domains for the tenant."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domains: Vec<String>,
     #[doc = "The default domain for the tenant."]
     #[serde(rename = "defaultDomain", default, skip_serializing_if = "Option::is_none")]
@@ -629,7 +687,11 @@ pub mod tenant_id_description {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct TenantListResult {
     #[doc = "An array of tenants."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TenantIdDescription>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink")]
diff --git a/services/mgmt/saas/src/package_2018_03_01_beta/models.rs b/services/mgmt/saas/src/package_2018_03_01_beta/models.rs
index db99410c52..a70d2eddcd 100644
--- a/services/mgmt/saas/src/package_2018_03_01_beta/models.rs
+++ b/services/mgmt/saas/src/package_2018_03_01_beta/models.rs
@@ -46,10 +46,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -163,7 +172,11 @@ pub struct SaasAppOperationsResponseWithContinuation {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "the value of response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SaasAppOperation>,
 }
 impl azure_core::Continuable for SaasAppOperationsResponseWithContinuation {
@@ -263,7 +276,11 @@ pub struct SaasAppResponseWithContinuation {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "the value of response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SaasApp>,
 }
 impl azure_core::Continuable for SaasAppResponseWithContinuation {
@@ -508,7 +525,11 @@ pub struct SaasResourceResponseWithContinuation {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "the value of response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SaasResource>,
 }
 impl azure_core::Continuable for SaasResourceResponseWithContinuation {
@@ -555,7 +576,11 @@ pub struct MoveResource {
     #[serde(rename = "targetResourceGroup", default, skip_serializing_if = "Option::is_none")]
     pub target_resource_group: Option<String>,
     #[doc = "The resource uris to move"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
 }
 impl MoveResource {
diff --git a/services/mgmt/scheduler/src/package_2014_08_preview/models.rs b/services/mgmt/scheduler/src/package_2014_08_preview/models.rs
index 0dd268cc2e..ad6b46e2b9 100644
--- a/services/mgmt/scheduler/src/package_2014_08_preview/models.rs
+++ b/services/mgmt/scheduler/src/package_2014_08_preview/models.rs
@@ -151,7 +151,11 @@ impl JobCollectionDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCollectionListResult {
     #[doc = "Gets the job collections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobCollectionDefinition>,
     #[doc = "Gets or sets the URL to get the next set of job collections."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -343,7 +347,11 @@ impl JobHistoryFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobHistoryListResult {
     #[doc = "Gets or sets the job histories under job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobHistoryDefinition>,
     #[doc = "Gets or sets the URL to get the next set of job histories."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -363,7 +371,11 @@ impl JobHistoryListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobListResult {
     #[doc = "Gets or sets all jobs under job collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobDefinition>,
     #[doc = "Gets or sets the URL to get the next set of jobs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -463,19 +475,42 @@ pub mod job_recurrence {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobRecurrenceSchedule {
     #[doc = "Gets or sets the days of the week that the job should execute on."]
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<String>,
     #[doc = "Gets or sets the hours of the day that the job should execute at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hours: Vec<i64>,
     #[doc = "Gets or sets the minutes of the hour that the job should execute at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minutes: Vec<i64>,
     #[doc = "Gets or sets the days of the month that the job should execute on. Must be between 1 and 31."]
-    #[serde(rename = "monthDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub month_days: Vec<i64>,
     #[doc = "Gets or sets the occurrences of days within a month."]
-    #[serde(rename = "monthlyOccurrences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthlyOccurrences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monthly_occurrences: Vec<JobRecurrenceScheduleMonthlyOccurrence>,
 }
 impl JobRecurrenceSchedule {
diff --git a/services/mgmt/scheduler/src/package_2016_01/models.rs b/services/mgmt/scheduler/src/package_2016_01/models.rs
index 0dd268cc2e..ad6b46e2b9 100644
--- a/services/mgmt/scheduler/src/package_2016_01/models.rs
+++ b/services/mgmt/scheduler/src/package_2016_01/models.rs
@@ -151,7 +151,11 @@ impl JobCollectionDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCollectionListResult {
     #[doc = "Gets the job collections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobCollectionDefinition>,
     #[doc = "Gets or sets the URL to get the next set of job collections."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -343,7 +347,11 @@ impl JobHistoryFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobHistoryListResult {
     #[doc = "Gets or sets the job histories under job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobHistoryDefinition>,
     #[doc = "Gets or sets the URL to get the next set of job histories."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -363,7 +371,11 @@ impl JobHistoryListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobListResult {
     #[doc = "Gets or sets all jobs under job collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobDefinition>,
     #[doc = "Gets or sets the URL to get the next set of jobs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -463,19 +475,42 @@ pub mod job_recurrence {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobRecurrenceSchedule {
     #[doc = "Gets or sets the days of the week that the job should execute on."]
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<String>,
     #[doc = "Gets or sets the hours of the day that the job should execute at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hours: Vec<i64>,
     #[doc = "Gets or sets the minutes of the hour that the job should execute at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minutes: Vec<i64>,
     #[doc = "Gets or sets the days of the month that the job should execute on. Must be between 1 and 31."]
-    #[serde(rename = "monthDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub month_days: Vec<i64>,
     #[doc = "Gets or sets the occurrences of days within a month."]
-    #[serde(rename = "monthlyOccurrences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthlyOccurrences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monthly_occurrences: Vec<JobRecurrenceScheduleMonthlyOccurrence>,
 }
 impl JobRecurrenceSchedule {
diff --git a/services/mgmt/scheduler/src/package_2016_03/models.rs b/services/mgmt/scheduler/src/package_2016_03/models.rs
index 5b6af0d441..e537c08498 100644
--- a/services/mgmt/scheduler/src/package_2016_03/models.rs
+++ b/services/mgmt/scheduler/src/package_2016_03/models.rs
@@ -162,7 +162,11 @@ impl JobCollectionDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCollectionListResult {
     #[doc = "Gets the job collections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobCollectionDefinition>,
     #[doc = "Gets or sets the URL to get the next set of job collections."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -354,7 +358,11 @@ impl JobHistoryFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobHistoryListResult {
     #[doc = "Gets or sets the job histories under job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobHistoryDefinition>,
     #[doc = "Gets or sets the URL to get the next set of job histories."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -374,7 +382,11 @@ impl JobHistoryListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobListResult {
     #[doc = "Gets or sets all jobs under job collection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobDefinition>,
     #[doc = "Gets or sets the URL to get the next set of jobs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -474,19 +486,42 @@ pub mod job_recurrence {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobRecurrenceSchedule {
     #[doc = "Gets or sets the days of the week that the job should execute on."]
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<String>,
     #[doc = "Gets or sets the hours of the day that the job should execute at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hours: Vec<i64>,
     #[doc = "Gets or sets the minutes of the hour that the job should execute at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minutes: Vec<i64>,
     #[doc = "Gets or sets the days of the month that the job should execute on. Must be between 1 and 31."]
-    #[serde(rename = "monthDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub month_days: Vec<i64>,
     #[doc = "Gets or sets the occurrences of days within a month."]
-    #[serde(rename = "monthlyOccurrences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthlyOccurrences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monthly_occurrences: Vec<JobRecurrenceScheduleMonthlyOccurrence>,
 }
 impl JobRecurrenceSchedule {
diff --git a/services/mgmt/scvmm/src/package_2020_06_05_preview/models.rs b/services/mgmt/scvmm/src/package_2020_06_05_preview/models.rs
index e6d1a17083..be464ad168 100644
--- a/services/mgmt/scvmm/src/package_2020_06_05_preview/models.rs
+++ b/services/mgmt/scvmm/src/package_2020_06_05_preview/models.rs
@@ -78,7 +78,11 @@ pub type AvailabilitySetList = Vec<serde_json::Value>;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailabilitySetListResult {
     #[doc = "List of AvailabilitySets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailabilitySet>,
     #[doc = "Url to follow for getting next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -207,7 +211,11 @@ impl CloudInventoryItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudListResult {
     #[doc = "List of Clouds."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cloud>,
     #[doc = "Url to follow for getting next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -243,7 +251,12 @@ pub struct CloudProperties {
     #[serde(rename = "cloudCapacity", default, skip_serializing_if = "Option::is_none")]
     pub cloud_capacity: Option<CloudCapacity>,
     #[doc = "List of QoS policies available for the cloud."]
-    #[serde(rename = "storageQoSPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageQoSPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_qo_s_policies: Vec<StorageQoSPolicy>,
     #[doc = "Gets or sets the provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -264,7 +277,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -664,10 +681,20 @@ pub struct NetworkInterfaces {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "Gets or sets the nic ipv4 addresses."]
-    #[serde(rename = "ipv4Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv4Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv4_addresses: Vec<String>,
     #[doc = "Gets or sets the nic ipv6 addresses."]
-    #[serde(rename = "ipv6Addresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv6Addresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv6_addresses: Vec<String>,
     #[doc = "Gets or sets the nic MAC address."]
     #[serde(rename = "macAddress", default, skip_serializing_if = "Option::is_none")]
@@ -730,7 +757,12 @@ impl NetworkInterfacesUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfile {
     #[doc = "Gets or sets the list of network interfaces associated with the virtual machine."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterfaces>,
 }
 impl NetworkProfile {
@@ -742,7 +774,12 @@ impl NetworkProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkProfileUpdate {
     #[doc = "Gets or sets the list of network interfaces associated with the virtual machine."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterfacesUpdate>,
 }
 impl NetworkProfileUpdate {
@@ -897,7 +934,11 @@ pub mod resource_provider_operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceProviderOperationList {
     #[doc = "List of Operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceProviderOperation>,
     #[doc = "Url to follow for getting next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -930,7 +971,11 @@ impl StopVirtualMachineOptions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageProfile {
     #[doc = "Gets or sets the list of virtual disks associated with the virtual machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<VirtualDisk>,
 }
 impl StorageProfile {
@@ -942,7 +987,11 @@ impl StorageProfile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageProfileUpdate {
     #[doc = "Gets or sets the list of virtual disks associated with the virtual machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<VirtualDiskUpdate>,
 }
 impl StorageProfileUpdate {
@@ -1036,7 +1085,11 @@ impl VmmServer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmmServerListResult {
     #[doc = "List of VmmServers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VmmServer>,
     #[doc = "Url to follow for getting next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1320,7 +1373,12 @@ pub struct VirtualMachineInventoryItem {
     #[serde(rename = "powerState", default, skip_serializing_if = "Option::is_none")]
     pub power_state: Option<String>,
     #[doc = "Gets or sets the nic ip addresses."]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "Defines the resource properties."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1342,7 +1400,11 @@ impl VirtualMachineInventoryItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineListResult {
     #[doc = "List of VirtualMachines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachine>,
     #[doc = "Url to follow for getting next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1378,7 +1440,11 @@ pub struct VirtualMachineProperties {
     #[serde(rename = "checkpointType", default, skip_serializing_if = "Option::is_none")]
     pub checkpoint_type: Option<String>,
     #[doc = "Checkpoints in the vm."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub checkpoints: Vec<Checkpoint>,
     #[doc = "Availability Sets in vm."]
     #[serde(rename = "availabilitySets", default, skip_serializing_if = "Option::is_none")]
@@ -1501,7 +1567,11 @@ impl VirtualMachineTemplateInventoryItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachineTemplateListResult {
     #[doc = "List of VirtualMachineTemplates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineTemplate>,
     #[doc = "Url to follow for getting next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1567,10 +1637,19 @@ pub struct VirtualMachineTemplateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub generation: Option<i32>,
     #[doc = "Gets or sets the network interfaces of the template."]
-    #[serde(rename = "networkInterfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkInterfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_interfaces: Vec<NetworkInterfaces>,
     #[doc = "Gets or sets the disks of the template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<VirtualDisk>,
     #[doc = "Gets or sets the provisioning state."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1792,7 +1871,11 @@ impl VirtualNetworkInventoryItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkListResult {
     #[doc = "List of VirtualNetworks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetwork>,
     #[doc = "Url to follow for getting next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/search/src/package_2019_10_preview/models.rs b/services/mgmt/search/src/package_2019_10_preview/models.rs
index 0787458caf..0cced4fbd8 100644
--- a/services/mgmt/search/src/package_2019_10_preview/models.rs
+++ b/services/mgmt/search/src/package_2019_10_preview/models.rs
@@ -130,7 +130,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Contains nested errors that are related to this error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -185,7 +189,11 @@ impl IpRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListQueryKeysResult {
     #[doc = "The query keys for the Azure Cognitive Search service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueryKey>,
 }
 impl azure_core::Continuable for ListQueryKeysResult {
@@ -206,7 +214,12 @@ pub struct NetworkRuleSet {
     #[serde(rename = "endpointAccess", default, skip_serializing_if = "Option::is_none")]
     pub endpoint_access: Option<network_rule_set::EndpointAccess>,
     #[doc = "A list of IP restriction rules that defines the inbound network access to the search service endpoint. These restriction rules are applied only when the EndpointAccess of the search service is Public."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
 }
 impl NetworkRuleSet {
@@ -271,7 +284,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of operation list results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -313,7 +330,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The list of Private Endpoint connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -414,10 +435,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The list of required members of the private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The list of required DNS zone names of the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -429,7 +460,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesResult {
     #[doc = "The list of supported Private Link Resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourcesResult {
@@ -506,7 +541,11 @@ impl SearchService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SearchServiceListResult {
     #[doc = "The list of Search services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SearchService>,
 }
 impl azure_core::Continuable for SearchServiceListResult {
@@ -545,7 +584,12 @@ pub struct SearchServiceProperties {
     #[serde(rename = "networkRuleSet", default, skip_serializing_if = "Option::is_none")]
     pub network_rule_set: Option<NetworkRuleSet>,
     #[doc = "The list of private endpoint connections to the Azure Cognitive Search service."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl SearchServiceProperties {
diff --git a/services/mgmt/search/src/package_2020_03/models.rs b/services/mgmt/search/src/package_2020_03/models.rs
index 231202f3ab..1aa216d578 100644
--- a/services/mgmt/search/src/package_2020_03/models.rs
+++ b/services/mgmt/search/src/package_2020_03/models.rs
@@ -130,7 +130,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Contains nested errors that are related to this error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -185,7 +189,11 @@ impl IpRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListQueryKeysResult {
     #[doc = "The query keys for the Azure Cognitive Search service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueryKey>,
     #[doc = "Request URL that can be used to query next page of query keys. Returned when the total number of requested query keys exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -206,7 +214,12 @@ impl ListQueryKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkRuleSet {
     #[doc = "A list of IP restriction rules that defines the inbound network(s) with allowing access to the search service endpoint. At the meantime, all other public IP networks are blocked by the firewall. These restriction rules are applied only when the 'publicNetworkAccess' of the search service is 'enabled'; otherwise, traffic over public interface is not allowed even with any public IP rules, and private endpoint connections would be the exclusive access method."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
 }
 impl NetworkRuleSet {
@@ -257,7 +270,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of operation list results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -299,7 +316,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The list of Private Endpoint connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -403,10 +424,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The list of required members of the private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The list of required DNS zone names of the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -418,7 +449,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesResult {
     #[doc = "The list of supported Private Link Resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourcesResult {
@@ -495,7 +530,11 @@ impl SearchService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SearchServiceListResult {
     #[doc = "The list of Search services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SearchService>,
     #[doc = "Request URL that can be used to query next page of search services. Returned when the total number of requested search services exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -540,7 +579,12 @@ pub struct SearchServiceProperties {
     #[serde(rename = "networkRuleSet", default, skip_serializing_if = "Option::is_none")]
     pub network_rule_set: Option<NetworkRuleSet>,
     #[doc = "The list of private endpoint connections to the Azure Cognitive Search service."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl SearchServiceProperties {
diff --git a/services/mgmt/search/src/package_2020_08/models.rs b/services/mgmt/search/src/package_2020_08/models.rs
index 74008559dc..386e643a36 100644
--- a/services/mgmt/search/src/package_2020_08/models.rs
+++ b/services/mgmt/search/src/package_2020_08/models.rs
@@ -184,7 +184,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Contains nested errors that are related to this error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -239,7 +243,11 @@ impl IpRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListQueryKeysResult {
     #[doc = "The query keys for the Azure Cognitive Search service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueryKey>,
     #[doc = "Request URL that can be used to query next page of query keys. Returned when the total number of requested query keys exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -260,7 +268,12 @@ impl ListQueryKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkRuleSet {
     #[doc = "A list of IP restriction rules that defines the inbound network(s) with allowing access to the search service endpoint. At the meantime, all other public IP networks are blocked by the firewall. These restriction rules are applied only when the 'publicNetworkAccess' of the search service is 'enabled'; otherwise, traffic over public interface is not allowed even with any public IP rules, and private endpoint connections would be the exclusive access method."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
 }
 impl NetworkRuleSet {
@@ -311,7 +324,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of operation list results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -346,7 +363,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The list of Private Endpoint connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -443,13 +464,28 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The list of required members of the private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The list of required DNS zone names of the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "The list of resources that are onboarded to private link service, that are supported by Azure Cognitive Search."]
-    #[serde(rename = "shareablePrivateLinkResourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareablePrivateLinkResourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shareable_private_link_resource_types: Vec<ShareablePrivateLinkResourceType>,
 }
 impl PrivateLinkResourceProperties {
@@ -461,7 +497,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesResult {
     #[doc = "The list of supported Private Link Resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourcesResult {
@@ -537,7 +577,11 @@ impl SearchService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SearchServiceListResult {
     #[doc = "The list of search services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SearchService>,
     #[doc = "Request URL that can be used to query next page of search services. Returned when the total number of requested search services exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -582,10 +626,20 @@ pub struct SearchServiceProperties {
     #[serde(rename = "networkRuleSet", default, skip_serializing_if = "Option::is_none")]
     pub network_rule_set: Option<NetworkRuleSet>,
     #[doc = "The list of private endpoint connections to the Azure Cognitive Search service."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources managed by the Azure Cognitive Search service."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
 }
 impl SearchServiceProperties {
@@ -725,7 +779,11 @@ impl SharedPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedPrivateLinkResourceListResult {
     #[doc = "The list of Shared Private Link Resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedPrivateLinkResource>,
     #[doc = "The URL to get the next set of shared private link resources, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/search/src/package_2020_08_preview/models.rs b/services/mgmt/search/src/package_2020_08_preview/models.rs
index 9d5c732e32..a7e2c393b5 100644
--- a/services/mgmt/search/src/package_2020_08_preview/models.rs
+++ b/services/mgmt/search/src/package_2020_08_preview/models.rs
@@ -184,7 +184,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Contains nested errors that are related to this error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -239,7 +243,11 @@ impl IpRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListQueryKeysResult {
     #[doc = "The query keys for the Azure Cognitive Search service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueryKey>,
     #[doc = "Request URL that can be used to query next page of query keys. Returned when the total number of requested query keys exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -260,7 +268,12 @@ impl ListQueryKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkRuleSet {
     #[doc = "A list of IP restriction rules that defines the inbound network(s) with allowing access to the search service endpoint. At the meantime, all other public IP networks are blocked by the firewall. These restriction rules are applied only when the 'publicNetworkAccess' of the search service is 'enabled'; otherwise, traffic over public interface is not allowed even with any public IP rules, and private endpoint connections would be the exclusive access method."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
 }
 impl NetworkRuleSet {
@@ -311,7 +324,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of operation list results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -346,7 +363,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The list of Private Endpoint connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -443,13 +464,28 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The list of required members of the private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The list of required DNS zone names of the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "The list of resources that are onboarded to private link service, that are supported by Azure Cognitive Search."]
-    #[serde(rename = "shareablePrivateLinkResourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareablePrivateLinkResourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shareable_private_link_resource_types: Vec<ShareablePrivateLinkResourceType>,
 }
 impl PrivateLinkResourceProperties {
@@ -461,7 +497,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesResult {
     #[doc = "The list of supported Private Link Resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourcesResult {
@@ -537,7 +577,11 @@ impl SearchService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SearchServiceListResult {
     #[doc = "The list of Search services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SearchService>,
     #[doc = "Request URL that can be used to query next page of search services. Returned when the total number of requested search services exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -582,10 +626,20 @@ pub struct SearchServiceProperties {
     #[serde(rename = "networkRuleSet", default, skip_serializing_if = "Option::is_none")]
     pub network_rule_set: Option<NetworkRuleSet>,
     #[doc = "The list of private endpoint connections to the Azure Cognitive Search service."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources managed by the Azure Cognitive Search service."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
 }
 impl SearchServiceProperties {
@@ -725,7 +779,11 @@ impl SharedPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedPrivateLinkResourceListResult {
     #[doc = "The list of Shared Private Link Resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedPrivateLinkResource>,
     #[doc = "The URL to get the next set of shared private link resources, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/search/src/package_2021_04_preview/models.rs b/services/mgmt/search/src/package_2021_04_preview/models.rs
index acbb3f67a8..5d21e1948b 100644
--- a/services/mgmt/search/src/package_2021_04_preview/models.rs
+++ b/services/mgmt/search/src/package_2021_04_preview/models.rs
@@ -187,7 +187,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Contains nested errors that are related to this error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -386,7 +390,11 @@ impl IpRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListQueryKeysResult {
     #[doc = "The query keys for the Azure Cognitive Search service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueryKey>,
     #[doc = "Request URL that can be used to query next page of query keys. Returned when the total number of requested query keys exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -407,7 +415,12 @@ impl ListQueryKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkRuleSet {
     #[doc = "A list of IP restriction rules that defines the inbound network(s) with allowing access to the search service endpoint. At the meantime, all other public IP networks are blocked by the firewall. These restriction rules are applied only when the 'publicNetworkAccess' of the search service is 'enabled'; otherwise, traffic over public interface is not allowed even with any public IP rules, and private endpoint connections would be the exclusive access method."]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
     #[doc = "Possible origins of inbound traffic that can bypass the rules defined in the 'ipRules' section."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -525,7 +538,11 @@ impl OperationAvailability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "The list of operations by Azure Cognitive Search, some supported by the resource provider and others by data plane APIs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL to get the next set of operation list results, if any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -594,10 +611,18 @@ pub struct OperationMetricsSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Dimensions for the metric specification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<OperationMetricDimension>,
     #[doc = "Availabilities for the metric specification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<OperationAvailability>,
 }
 impl OperationMetricsSpecification {
@@ -621,10 +646,20 @@ impl OperationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationServiceSpecification {
     #[doc = "Specifications of metrics for this operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetricsSpecification>,
     #[doc = "Specifications of logs for this operation."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationLogsSpecification>,
 }
 impl OperationServiceSpecification {
@@ -650,7 +685,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "The list of Private Endpoint connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -747,13 +786,28 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The list of required members of the private link resource."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The list of required DNS zone names of the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "The list of resources that are onboarded to private link service, that are supported by Azure Cognitive Search."]
-    #[serde(rename = "shareablePrivateLinkResourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareablePrivateLinkResourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shareable_private_link_resource_types: Vec<ShareablePrivateLinkResourceType>,
 }
 impl PrivateLinkResourceProperties {
@@ -765,7 +819,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesResult {
     #[doc = "The list of supported Private Link Resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourcesResult {
@@ -841,7 +899,11 @@ impl SearchService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SearchServiceListResult {
     #[doc = "The list of Search services."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SearchService>,
     #[doc = "Request URL that can be used to query next page of search services. Returned when the total number of requested search services exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -886,7 +948,12 @@ pub struct SearchServiceProperties {
     #[serde(rename = "networkRuleSet", default, skip_serializing_if = "Option::is_none")]
     pub network_rule_set: Option<NetworkRuleSet>,
     #[doc = "A list of data exfiltration scenarios that are explicitly disallowed for the search service. Currently, the only supported value is 'All' to disable all possible data export scenarios with more fine grained controls planned for the future."]
-    #[serde(rename = "disabledDataExfiltrationOptions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledDataExfiltrationOptions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_data_exfiltration_options: Vec<DisabledDataExfiltrationOption>,
     #[doc = "Describes a policy that determines how resources within the search service are to be encrypted with Customer Managed Keys."]
     #[serde(rename = "encryptionWithCmk", default, skip_serializing_if = "Option::is_none")]
@@ -901,10 +968,20 @@ pub struct SearchServiceProperties {
     #[serde(rename = "semanticSearch", default, skip_serializing_if = "Option::is_none")]
     pub semantic_search: Option<SemanticSearch>,
     #[doc = "The list of private endpoint connections to the Azure Cognitive Search service."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources managed by the Azure Cognitive Search service."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
     #[doc = "A system generated property representing the service's etag that can be for optimistic concurrency control during updates."]
     #[serde(rename = "eTag", default, skip_serializing_if = "Option::is_none")]
@@ -1122,7 +1199,11 @@ impl SharedPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedPrivateLinkResourceListResult {
     #[doc = "The list of Shared Private Link Resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedPrivateLinkResource>,
     #[doc = "The URL to get the next set of shared private link resources, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/security/src/package_preview_2021_10/models.rs b/services/mgmt/security/src/package_preview_2021_10/models.rs
index 25403ac817..932a8c7fda 100644
--- a/services/mgmt/security/src/package_preview_2021_10/models.rs
+++ b/services/mgmt/security/src/package_preview_2021_10/models.rs
@@ -28,10 +28,19 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl CloudErrorBody {
@@ -72,7 +81,11 @@ impl MdeOnboardingData {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MdeOnboardingDataList {
     #[doc = "List of the resources of the configuration or data needed to onboard the machine to MDE"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MdeOnboardingData>,
 }
 impl MdeOnboardingDataList {
diff --git a/services/mgmt/security/src/package_preview_2021_12/models.rs b/services/mgmt/security/src/package_preview_2021_12/models.rs
index ce17ca7d4c..a3bd1f22cc 100644
--- a/services/mgmt/security/src/package_preview_2021_12/models.rs
+++ b/services/mgmt/security/src/package_preview_2021_12/models.rs
@@ -83,7 +83,12 @@ pub struct AwsOrganizationalDataMaster {
     #[serde(rename = "stacksetName", default, skip_serializing_if = "Option::is_none")]
     pub stackset_name: Option<String>,
     #[doc = "If the multi cloud account is of membership type organization, list of accounts excluded from offering"]
-    #[serde(rename = "excludedAccountIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedAccountIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_account_ids: Vec<String>,
 }
 impl AwsOrganizationalDataMaster {
@@ -155,10 +160,19 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl CloudErrorBody {
@@ -324,7 +338,12 @@ pub struct GcpOrganizationalDataOrganization {
     #[serde(flatten)]
     pub gcp_organizational_data: GcpOrganizationalData,
     #[doc = "If the multi cloud account is of membership type organization, list of accounts excluded from offering"]
-    #[serde(rename = "excludedProjectNumbers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedProjectNumbers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_project_numbers: Vec<String>,
     #[doc = "The service account email address which represents the organization level permissions container."]
     #[serde(rename = "serviceAccountEmailAddress", default, skip_serializing_if = "Option::is_none")]
@@ -448,7 +467,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of Security operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URI to fetch the next page."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -510,7 +533,11 @@ pub struct SecurityConnectorProperties {
     #[serde(rename = "environmentName", default, skip_serializing_if = "Option::is_none")]
     pub environment_name: Option<security_connector_properties::EnvironmentName>,
     #[doc = "A collection of offerings for the security connector."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub offerings: Vec<CloudOffering>,
     #[doc = "The security connector environment data."]
     #[serde(rename = "environmentData", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/security/src/package_preview_2022_01/models.rs b/services/mgmt/security/src/package_preview_2022_01/models.rs
index 82f508cb99..0af352708f 100644
--- a/services/mgmt/security/src/package_preview_2022_01/models.rs
+++ b/services/mgmt/security/src/package_preview_2022_01/models.rs
@@ -34,10 +34,19 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl CloudErrorBody {
@@ -213,7 +222,11 @@ impl GovernanceAssignmentProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GovernanceAssignmentsList {
     #[doc = "Collection of governance assignments in this page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GovernanceAssignment>,
     #[doc = "The URI to fetch the next page"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -286,7 +299,11 @@ impl GovernanceRuleEmailNotification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GovernanceRuleList {
     #[doc = "Collection of governanceRules in this page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GovernanceRule>,
     #[doc = "The URI to fetch the next page"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/security/src/package_preview_2022_05/models.rs b/services/mgmt/security/src/package_preview_2022_05/models.rs
index a06a1ed130..1015c53d53 100644
--- a/services/mgmt/security/src/package_preview_2022_05/models.rs
+++ b/services/mgmt/security/src/package_preview_2022_05/models.rs
@@ -83,7 +83,12 @@ pub struct AwsOrganizationalDataMaster {
     #[serde(rename = "stacksetName", default, skip_serializing_if = "Option::is_none")]
     pub stackset_name: Option<String>,
     #[doc = "If the multi cloud account is of membership type organization, list of accounts excluded from offering"]
-    #[serde(rename = "excludedAccountIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedAccountIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_account_ids: Vec<String>,
 }
 impl AwsOrganizationalDataMaster {
@@ -166,10 +171,19 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl CloudErrorBody {
@@ -341,7 +355,12 @@ pub struct GcpOrganizationalDataOrganization {
     #[serde(flatten)]
     pub gcp_organizational_data: GcpOrganizationalData,
     #[doc = "If the multi cloud account is of membership type organization, list of accounts excluded from offering"]
-    #[serde(rename = "excludedProjectNumbers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedProjectNumbers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_project_numbers: Vec<String>,
     #[doc = "The service account email address which represents the organization level permissions container."]
     #[serde(rename = "serviceAccountEmailAddress", default, skip_serializing_if = "Option::is_none")]
@@ -470,7 +489,11 @@ pub struct SecurityConnectorProperties {
     #[serde(rename = "environmentName", default, skip_serializing_if = "Option::is_none")]
     pub environment_name: Option<security_connector_properties::EnvironmentName>,
     #[doc = "A collection of offerings for the security connector."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub offerings: Vec<CloudOffering>,
     #[doc = "The security connector environment data."]
     #[serde(rename = "environmentData", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/security/src/package_preview_2022_07/models.rs b/services/mgmt/security/src/package_preview_2022_07/models.rs
index 7f165b5e7b..c4f5d1c6d0 100644
--- a/services/mgmt/security/src/package_preview_2022_07/models.rs
+++ b/services/mgmt/security/src/package_preview_2022_07/models.rs
@@ -152,7 +152,11 @@ pub mod application_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationsList {
     #[doc = "Collection of applications in this page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "The URI to fetch the next page"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -200,10 +204,19 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl CloudErrorBody {
diff --git a/services/mgmt/securityandcompliance/src/package_2021_01_11/models.rs b/services/mgmt/securityandcompliance/src/package_2021_01_11/models.rs
index 8fa3e4ca92..8a718c6544 100644
--- a/services/mgmt/securityandcompliance/src/package_2021_01_11/models.rs
+++ b/services/mgmt/securityandcompliance/src/package_2021_01_11/models.rs
@@ -88,7 +88,11 @@ pub struct OperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service operations supported by the Microsoft.SecurityAndCompliance resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -205,7 +209,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -345,7 +353,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -363,10 +375,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -416,7 +438,11 @@ pub struct PrivateLinkServicesForEdmUploadDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForEdmUploadDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForEdmUploadDescriptionListResult {
@@ -454,7 +480,11 @@ pub struct PrivateLinkServicesForM365ComplianceCenterDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForM365ComplianceCenterDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForM365ComplianceCenterDescriptionListResult {
@@ -492,7 +522,11 @@ pub struct PrivateLinkServicesForM365SecurityCenterDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForM365SecurityCenterDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForM365SecurityCenterDescriptionListResult {
@@ -530,7 +564,11 @@ pub struct PrivateLinkServicesForO365ManagementActivityApiDescriptionListResult
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForO365ManagementActivityApiDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForO365ManagementActivityApiDescriptionListResult {
@@ -568,7 +606,11 @@ pub struct PrivateLinkServicesForSccPowershellDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForSccPowershellDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForSccPowershellDescriptionListResult {
@@ -636,13 +678,25 @@ pub type ServiceCorsConfigurationHeaderEntry = String;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceCorsConfigurationInfo {
     #[doc = "The origins to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<ServiceCorsConfigurationOriginEntry>,
     #[doc = "The headers to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ServiceCorsConfigurationHeaderEntry>,
     #[doc = "The methods to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub methods: Vec<ServiceCorsConfigurationMethodEntry>,
     #[doc = "The max age to be allowed via CORS."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -722,7 +776,12 @@ pub struct ServicesProperties {
     #[serde(rename = "exportConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub export_configuration: Option<ServiceExportConfigurationInfo>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/securityandcompliance/src/package_2021_03_08/models.rs b/services/mgmt/securityandcompliance/src/package_2021_03_08/models.rs
index 0e780ea029..af060d8677 100644
--- a/services/mgmt/securityandcompliance/src/package_2021_03_08/models.rs
+++ b/services/mgmt/securityandcompliance/src/package_2021_03_08/models.rs
@@ -88,7 +88,11 @@ pub struct OperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service operations supported by the Microsoft.SecurityAndCompliance resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -205,7 +209,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -345,7 +353,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -363,10 +375,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -416,7 +438,11 @@ pub struct PrivateLinkServicesForEdmUploadDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForEdmUploadDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForEdmUploadDescriptionListResult {
@@ -454,7 +480,11 @@ pub struct PrivateLinkServicesForM365ComplianceCenterDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForM365ComplianceCenterDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForM365ComplianceCenterDescriptionListResult {
@@ -492,7 +522,11 @@ pub struct PrivateLinkServicesForM365SecurityCenterDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForM365SecurityCenterDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForM365SecurityCenterDescriptionListResult {
@@ -530,7 +564,11 @@ pub struct PrivateLinkServicesForMipPolicySyncDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForMipPolicySyncDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForMipPolicySyncDescriptionListResult {
@@ -568,7 +606,11 @@ pub struct PrivateLinkServicesForO365ManagementActivityApiDescriptionListResult
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForO365ManagementActivityApiDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForO365ManagementActivityApiDescriptionListResult {
@@ -606,7 +648,11 @@ pub struct PrivateLinkServicesForSccPowershellDescriptionListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "A list of service description objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkServicesForSccPowershellDescription>,
 }
 impl azure_core::Continuable for PrivateLinkServicesForSccPowershellDescriptionListResult {
@@ -674,13 +720,25 @@ pub type ServiceCorsConfigurationHeaderEntry = String;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceCorsConfigurationInfo {
     #[doc = "The origins to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub origins: Vec<ServiceCorsConfigurationOriginEntry>,
     #[doc = "The headers to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<ServiceCorsConfigurationHeaderEntry>,
     #[doc = "The methods to be allowed via CORS."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub methods: Vec<ServiceCorsConfigurationMethodEntry>,
     #[doc = "The max age to be allowed via CORS."]
     #[serde(rename = "maxAge", default, skip_serializing_if = "Option::is_none")]
@@ -760,7 +818,12 @@ pub struct ServicesProperties {
     #[serde(rename = "exportConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub export_configuration: Option<ServiceExportConfigurationInfo>,
     #[doc = "The list of private endpoint connections that are set up for this resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Control permission for data plane traffic coming from public networks while private endpoint is enabled."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/securityinsights/src/package_preview_2022_05/models.rs b/services/mgmt/securityinsights/src/package_preview_2022_05/models.rs
index 2b37be5c38..7b816417c3 100644
--- a/services/mgmt/securityinsights/src/package_preview_2022_05/models.rs
+++ b/services/mgmt/securityinsights/src/package_preview_2022_05/models.rs
@@ -352,7 +352,12 @@ pub struct ActivityEntityQueriesProperties {
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "List of the fields of the source entity that are required to run the query"]
-    #[serde(rename = "requiredInputFieldsSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredInputFieldsSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_input_fields_sets: Vec<Vec<String>>,
     #[doc = "The query applied only to entities matching to all filters"]
     #[serde(rename = "entitiesFilter", default, skip_serializing_if = "Option::is_none")]
@@ -440,13 +445,23 @@ pub struct ActivityEntityQueryTemplateProperties {
     #[serde(rename = "queryDefinitions", default, skip_serializing_if = "Option::is_none")]
     pub query_definitions: Option<activity_entity_query_template_properties::QueryDefinitions>,
     #[doc = "List of required data types for the given entity query template"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<DataTypeDefinitions>,
     #[doc = "The type of the entity"]
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "List of the fields of the source entity that are required to run the query"]
-    #[serde(rename = "requiredInputFieldsSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredInputFieldsSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_input_fields_sets: Vec<Vec<String>>,
     #[doc = "The query applied only to entities matching to all filters"]
     #[serde(rename = "entitiesFilter", default, skip_serializing_if = "Option::is_none")]
@@ -632,7 +647,12 @@ pub struct AlertRuleTemplateDataSource {
     #[serde(rename = "connectorId", default, skip_serializing_if = "Option::is_none")]
     pub connector_id: Option<String>,
     #[doc = "The data types used by the alert rule template"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<String>,
 }
 impl AlertRuleTemplateDataSource {
@@ -659,7 +679,12 @@ pub struct AlertRuleTemplatePropertiesBase {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The required data sources for this template"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<AlertRuleTemplateDataSource>,
     #[doc = "The alert rule template status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -715,10 +740,18 @@ pub struct AlertRuleTemplateWithMitreProperties {
     #[serde(flatten)]
     pub alert_rule_template_properties_base: AlertRuleTemplatePropertiesBase,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl AlertRuleTemplateWithMitreProperties {
@@ -887,13 +920,26 @@ pub struct AnomalySecurityMlAnalyticsSettingsProperties {
     #[serde(rename = "lastModifiedUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_modified_utc: Option<time::OffsetDateTime>,
     #[doc = "The required data sources for this SecurityMLAnalyticsSettings"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<SecurityMlAnalyticsSettingsDataSource>,
     #[doc = "The tactics of the SecurityMLAnalyticsSettings"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the SecurityMLAnalyticsSettings"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The anomaly version of the AnomalySecurityMLAnalyticsSettings."]
     #[serde(rename = "anomalyVersion")]
@@ -1013,10 +1059,18 @@ pub struct AnomalyTimelineItem {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub intent: Option<String>,
     #[doc = "The techniques of the anomaly."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The reasons that cause the anomaly."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons: Vec<String>,
 }
 impl AnomalyTimelineItem {
@@ -1724,7 +1778,12 @@ pub struct AutomationRulePropertyValuesChangedCondition {
     pub change_type: Option<AutomationRulePropertyChangedConditionSupportedChangedType>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<AutomationRulePropertyConditionSupportedOperator>,
-    #[serde(rename = "propertyValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_values: Vec<String>,
 }
 impl AutomationRulePropertyValuesChangedCondition {
@@ -1739,7 +1798,12 @@ pub struct AutomationRulePropertyValuesCondition {
     pub property_name: Option<AutomationRulePropertyConditionSupportedProperty>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<AutomationRulePropertyConditionSupportedOperator>,
-    #[serde(rename = "propertyValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_values: Vec<String>,
 }
 impl AutomationRulePropertyValuesCondition {
@@ -1777,7 +1841,11 @@ pub struct AutomationRuleTriggeringLogic {
     #[serde(rename = "triggersWhen")]
     pub triggers_when: TriggersWhen,
     #[doc = "The conditions to evaluate to determine if the automation rule should be triggered on a given object."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<AutomationRuleCondition>,
 }
 impl AutomationRuleTriggeringLogic {
@@ -1793,7 +1861,11 @@ impl AutomationRuleTriggeringLogic {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AutomationRulesList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AutomationRule>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1992,7 +2064,12 @@ pub struct BookmarkEntityMappings {
     #[serde(rename = "entityType", default, skip_serializing_if = "Option::is_none")]
     pub entity_type: Option<String>,
     #[doc = "Array of fields mapping for that entity type"]
-    #[serde(rename = "fieldMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_mappings: Vec<EntityFieldMapping>,
 }
 impl BookmarkEntityMappings {
@@ -2039,10 +2116,18 @@ pub mod bookmark_expand_response {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Value {
         #[doc = "Array of the expansion result entities."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub entities: Vec<Entity>,
         #[doc = "Array of expansion result connected entities"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub edges: Vec<ConnectedEntity>,
     }
     impl Value {
@@ -2084,7 +2169,11 @@ pub struct BookmarkProperties {
     #[serde(rename = "displayName")]
     pub display_name: String,
     #[doc = "List of labels relevant to this bookmark"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
     #[doc = "The notes of the bookmark"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2116,10 +2205,18 @@ pub struct BookmarkProperties {
     #[serde(rename = "entityMappings", default, skip_serializing_if = "Option::is_none")]
     pub entity_mappings: Option<EntityMappingsList>,
     #[doc = "A list of relevant mitre attacks"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "A list of relevant mitre techniques"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<AttackTechnique>,
 }
 impl BookmarkProperties {
@@ -2171,7 +2268,11 @@ pub struct BookmarkTimelineItem {
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
     pub created_by: Option<UserInfo>,
     #[doc = "List of labels relevant to this bookmark"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
 }
 impl BookmarkTimelineItem {
@@ -2639,7 +2740,11 @@ pub struct ConnectivityCriteria {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<connectivity_criteria::Type>,
     #[doc = "Queries for checking connectivity"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl ConnectivityCriteria {
@@ -2949,7 +3054,12 @@ pub struct DataConnectorConnectBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub password: Option<String>,
     #[doc = ""]
-    #[serde(rename = "requestConfigUserInputValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestConfigUserInputValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_config_user_input_values: Vec<serde_json::Value>,
 }
 impl DataConnectorConnectBody {
@@ -3534,7 +3644,11 @@ pub struct EnrichmentDomainWhoisContact {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub org: Option<String>,
     #[doc = "A list describing the street address for this contact"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub street: Vec<String>,
     #[doc = "The city for this contact"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3594,10 +3708,19 @@ pub struct EnrichmentDomainWhoisDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub contacts: Option<EnrichmentDomainWhoisContacts>,
     #[doc = "A list of name servers associated with this domain"]
-    #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nameServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name_servers: Vec<String>,
     #[doc = "The set of status flags for this whois record"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<String>,
 }
 impl EnrichmentDomainWhoisDetails {
@@ -3729,7 +3852,12 @@ impl EntityAnalytics {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EntityAnalyticsProperties {
     #[doc = "The relevant entity providers that are synced"]
-    #[serde(rename = "entityProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "entityProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entity_providers: Vec<EntityProviders>,
 }
 impl EntityAnalyticsProperties {
@@ -3806,10 +3934,18 @@ pub mod entity_expand_response {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Value {
         #[doc = "Array of the expansion result entities."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub entities: Vec<Entity>,
         #[doc = "Array of edges that connects the entity to the list of entities."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub edges: Vec<EntityEdges>,
     }
     impl Value {
@@ -3846,7 +3982,12 @@ pub struct EntityGetInsightsParameters {
     #[serde(rename = "addDefaultExtendedTimeRange", default, skip_serializing_if = "Option::is_none")]
     pub add_default_extended_time_range: Option<bool>,
     #[doc = "List of Insights Query Id. If empty, default value is all insights of this entity"]
-    #[serde(rename = "insightQueryIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "insightQueryIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub insight_query_ids: Vec<String>,
 }
 impl EntityGetInsightsParameters {
@@ -3866,7 +4007,11 @@ pub struct EntityGetInsightsResponse {
     #[serde(rename = "metaData", default, skip_serializing_if = "Option::is_none")]
     pub meta_data: Option<GetInsightsResultsMetadata>,
     #[doc = "The insights result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityInsightItem>,
 }
 impl EntityGetInsightsResponse {
@@ -4040,7 +4185,12 @@ pub struct EntityInsightItem {
     #[serde(rename = "tableQueryResults", default, skip_serializing_if = "Option::is_none")]
     pub table_query_results: Option<InsightsTableResult>,
     #[doc = "Query results for table insights query."]
-    #[serde(rename = "chartQueryResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "chartQueryResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub chart_query_results: Vec<InsightsTableResult>,
 }
 impl EntityInsightItem {
@@ -4093,7 +4243,12 @@ pub struct EntityMapping {
     #[serde(rename = "entityType", default, skip_serializing_if = "Option::is_none")]
     pub entity_type: Option<EntityMappingType>,
     #[doc = "array of field mappings for the given entity mapping"]
-    #[serde(rename = "fieldMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_mappings: Vec<FieldMapping>,
 }
 impl EntityMapping {
@@ -4257,13 +4412,23 @@ impl EntityQueryItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EntityQueryItemProperties {
     #[doc = "Data types for template"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<serde_json::Value>,
     #[doc = "The type of the entity"]
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "Data types for template"]
-    #[serde(rename = "requiredInputFieldsSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredInputFieldsSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_input_fields_sets: Vec<Vec<String>>,
     #[doc = "The query applied only to entities matching to all filters"]
     #[serde(rename = "entitiesFilter", default, skip_serializing_if = "Option::is_none")]
@@ -4460,7 +4625,11 @@ impl Serialize for EntityTimelineKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct EntityTimelineParameters {
     #[doc = "Array of timeline Item kinds."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kinds: Vec<EntityTimelineKind>,
     #[doc = "The start timeline date, so the results returned are after this date."]
     #[serde(rename = "startTime", with = "azure_core::date::rfc3339")]
@@ -4489,7 +4658,11 @@ pub struct EntityTimelineResponse {
     #[serde(rename = "metaData", default, skip_serializing_if = "Option::is_none")]
     pub meta_data: Option<TimelineResultsMetadata>,
     #[doc = "The timeline result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityTimelineItem>,
 }
 impl EntityTimelineResponse {
@@ -4550,7 +4723,12 @@ impl EventGroupingSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpansionEntityQueriesProperties {
     #[doc = "List of the data sources that are required to run the query"]
-    #[serde(rename = "dataSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_sources: Vec<String>,
     #[doc = "The query display name"]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
@@ -4559,10 +4737,20 @@ pub struct ExpansionEntityQueriesProperties {
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "List of the fields of the source entity that are required to run the query"]
-    #[serde(rename = "inputFields", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputFields",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_fields: Vec<String>,
     #[doc = "List of the desired output types to be constructed from the result"]
-    #[serde(rename = "outputEntityTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputEntityTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_entity_types: Vec<EntityInnerType>,
     #[doc = "The template query string to be parsed and formatted"]
     #[serde(rename = "queryTemplate", default, skip_serializing_if = "Option::is_none")]
@@ -4619,7 +4807,11 @@ impl ExpansionResultAggregation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpansionResultsMetadata {
     #[doc = "Information of the aggregated nodes in the expansion result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aggregations: Vec<ExpansionResultAggregation>,
 }
 impl ExpansionResultsMetadata {
@@ -4703,10 +4895,20 @@ pub struct FusionAlertRuleProperties {
     #[doc = "Determines whether this alert rule is enabled or disabled."]
     pub enabled: bool,
     #[doc = "Configuration for all supported source signals in fusion detection."]
-    #[serde(rename = "sourceSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_settings: Vec<FusionSourceSettings>,
     #[doc = "Configuration to exclude scenarios in fusion detection."]
-    #[serde(rename = "scenarioExclusionPatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scenarioExclusionPatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scenario_exclusion_patterns: Vec<FusionScenarioExclusionPattern>,
     #[doc = "The last time that this alert has been modified."]
     #[serde(rename = "lastModifiedUtc", default, with = "azure_core::date::rfc3339::option")]
@@ -4715,10 +4917,18 @@ pub struct FusionAlertRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl FusionAlertRuleProperties {
@@ -4773,7 +4983,12 @@ pub struct FusionAlertRuleTemplateProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The required data connectors for this template"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<AlertRuleTemplateDataSource>,
     #[doc = "The alert rule template status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4782,13 +4997,26 @@ pub struct FusionAlertRuleTemplateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule template"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "All supported source signal configurations consumed in fusion detection."]
-    #[serde(rename = "sourceSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_settings: Vec<FusionTemplateSourceSetting>,
 }
 impl FusionAlertRuleTemplateProperties {
@@ -4823,7 +5051,12 @@ pub struct FusionSourceSettings {
     #[serde(rename = "sourceName")]
     pub source_name: String,
     #[doc = "Configuration for all source subtypes under this source signal consumed in fusion detection."]
-    #[serde(rename = "sourceSubTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSubTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_sub_types: Vec<FusionSourceSubTypeSetting>,
 }
 impl FusionSourceSettings {
@@ -4867,7 +5100,11 @@ pub struct FusionSubTypeSeverityFilter {
     #[serde(rename = "isSupported", default, skip_serializing_if = "Option::is_none")]
     pub is_supported: Option<bool>,
     #[doc = "Individual Severity configuration settings for a given source subtype consumed in Fusion detection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<FusionSubTypeSeverityFiltersItem>,
 }
 impl FusionSubTypeSeverityFilter {
@@ -4895,7 +5132,12 @@ pub struct FusionTemplateSourceSetting {
     #[serde(rename = "sourceName")]
     pub source_name: String,
     #[doc = "All supported source subtypes under this source signal consumed in fusion detection."]
-    #[serde(rename = "sourceSubTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSubTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_sub_types: Vec<FusionTemplateSourceSubType>,
 }
 impl FusionTemplateSourceSetting {
@@ -4935,7 +5177,12 @@ pub struct FusionTemplateSubTypeSeverityFilter {
     #[serde(rename = "isSupported")]
     pub is_supported: bool,
     #[doc = "List of all supported severities for this source subtype consumed in Fusion detection."]
-    #[serde(rename = "severityFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "severityFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub severity_filters: Vec<AlertSeverityEnum>,
 }
 impl FusionTemplateSubTypeSeverityFilter {
@@ -5012,7 +5259,11 @@ pub struct GetInsightsResultsMetadata {
     #[serde(rename = "totalCount")]
     pub total_count: i32,
     #[doc = "information about the failed queries"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<GetInsightsErrorKind>,
 }
 impl GetInsightsResultsMetadata {
@@ -5027,7 +5278,11 @@ impl GetInsightsResultsMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GetQueriesResponse {
     #[doc = "The query result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityQueryItem>,
 }
 impl GetQueriesResponse {
@@ -5080,13 +5335,28 @@ pub struct GroupingConfiguration {
     #[serde(rename = "matchingMethod")]
     pub matching_method: grouping_configuration::MatchingMethod,
     #[doc = "A list of entity types to group by (when matchingMethod is Selected). Only entities defined in the current alert rule may be used."]
-    #[serde(rename = "groupByEntities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByEntities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_entities: Vec<EntityMappingType>,
     #[doc = "A list of alert details to group by (when matchingMethod is Selected)"]
-    #[serde(rename = "groupByAlertDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByAlertDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_alert_details: Vec<String>,
     #[doc = "A list of custom details keys to group by (when matchingMethod is Selected). Only keys defined in the current alert rule may be used."]
-    #[serde(rename = "groupByCustomDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByCustomDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_custom_details: Vec<String>,
 }
 impl GroupingConfiguration {
@@ -5181,7 +5451,11 @@ pub struct HuntingBookmarkProperties {
     #[serde(rename = "eventTime", default, with = "azure_core::date::rfc3339::option")]
     pub event_time: Option<time::OffsetDateTime>,
     #[doc = "List of labels relevant to this bookmark"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
     #[doc = "The notes of the bookmark"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5246,16 +5520,29 @@ pub struct IncidentAdditionalData {
     #[serde(rename = "commentsCount", default, skip_serializing_if = "Option::is_none")]
     pub comments_count: Option<i32>,
     #[doc = "List of product names of alerts in the incident"]
-    #[serde(rename = "alertProductNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alertProductNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alert_product_names: Vec<String>,
     #[doc = "The provider incident url to the incident in Microsoft 365 Defender portal"]
     #[serde(rename = "providerIncidentUrl", default, skip_serializing_if = "Option::is_none")]
     pub provider_incident_url: Option<String>,
     #[doc = "The tactics associated with incident"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques associated with incident's tactics'"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl IncidentAdditionalData {
@@ -5450,10 +5737,19 @@ impl IncidentConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IncidentEntitiesResponse {
     #[doc = "Array of the incident related entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entities: Vec<Entity>,
     #[doc = "The metadata from the incident related entities results."]
-    #[serde(rename = "metaData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metaData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meta_data: Vec<IncidentEntitiesResultsMetadata>,
 }
 impl IncidentEntitiesResponse {
@@ -5668,7 +5964,11 @@ pub struct IncidentProperties {
     #[serde(rename = "incidentNumber", default, skip_serializing_if = "Option::is_none")]
     pub incident_number: Option<i32>,
     #[doc = "List of labels relevant to this incident"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<IncidentLabel>,
     #[doc = "The name of the source provider that generated the incident"]
     #[serde(rename = "providerName", default, skip_serializing_if = "Option::is_none")]
@@ -5686,7 +5986,12 @@ pub struct IncidentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub owner: Option<IncidentOwnerInfo>,
     #[doc = "List of resource ids of Analytic rules related to the incident"]
-    #[serde(rename = "relatedAnalyticRuleIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "relatedAnalyticRuleIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub related_analytic_rule_ids: Vec<String>,
     #[doc = "The severity of the incident"]
     pub severity: IncidentSeverityEnum,
@@ -5745,7 +6050,11 @@ pub struct IncidentPropertiesAction {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub owner: Option<IncidentOwnerInfo>,
     #[doc = "List of labels to add to the incident."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<IncidentLabel>,
 }
 impl IncidentPropertiesAction {
@@ -5891,10 +6200,20 @@ pub mod insight_query_item_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct TableQuery {
         #[doc = "List of insight column definitions."]
-        #[serde(rename = "columnsDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "columnsDefinitions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub columns_definitions: Vec<serde_json::Value>,
         #[doc = "List of insight queries definitions."]
-        #[serde(rename = "queriesDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "queriesDefinitions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries_definitions: Vec<serde_json::Value>,
     }
     impl TableQuery {
@@ -5949,10 +6268,18 @@ pub mod insight_query_item_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InsightsTableResult {
     #[doc = "Columns Metadata of the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<serde_json::Value>,
     #[doc = "Rows data of the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rows: Vec<Vec<String>>,
 }
 impl InsightsTableResult {
@@ -5970,7 +6297,11 @@ pub struct InstructionSteps {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Instruction step details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instructions: Vec<serde_json::Value>,
 }
 impl InstructionSteps {
@@ -6232,10 +6563,18 @@ pub struct MlBehaviorAnalyticsAlertRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl MlBehaviorAnalyticsAlertRuleProperties {
@@ -6534,16 +6873,31 @@ impl MicrosoftSecurityIncidentCreationAlertRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct MicrosoftSecurityIncidentCreationAlertRuleCommonProperties {
     #[doc = "the alerts' displayNames on which the cases will be generated"]
-    #[serde(rename = "displayNamesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_filter: Vec<String>,
     #[doc = "the alerts' displayNames on which the cases will not be generated"]
-    #[serde(rename = "displayNamesExcludeFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesExcludeFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_exclude_filter: Vec<String>,
     #[doc = "The alerts' productName on which the cases will be generated"]
     #[serde(rename = "productFilter")]
     pub product_filter: MicrosoftSecurityProductName,
     #[doc = "the alerts' severities on which the cases will be generated"]
-    #[serde(rename = "severitiesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "severitiesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub severities_filter: Vec<AlertSeverityEnum>,
 }
 impl MicrosoftSecurityIncidentCreationAlertRuleCommonProperties {
@@ -6615,16 +6969,31 @@ pub struct MicrosoftSecurityIncidentCreationAlertRuleTemplateProperties {
     #[serde(flatten)]
     pub alert_rule_template_properties_base: AlertRuleTemplatePropertiesBase,
     #[doc = "the alerts' displayNames on which the cases will be generated"]
-    #[serde(rename = "displayNamesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_filter: Vec<String>,
     #[doc = "the alerts' displayNames on which the cases will not be generated"]
-    #[serde(rename = "displayNamesExcludeFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesExcludeFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_exclude_filter: Vec<String>,
     #[doc = "The alerts' productName on which the cases will be generated"]
     #[serde(rename = "productFilter", default, skip_serializing_if = "Option::is_none")]
     pub product_filter: Option<MicrosoftSecurityProductName>,
     #[doc = "the alerts' severities on which the cases will be generated"]
-    #[serde(rename = "severitiesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "severitiesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub severities_filter: Vec<AlertSeverityEnum>,
 }
 impl MicrosoftSecurityIncidentCreationAlertRuleTemplateProperties {
@@ -6749,10 +7118,18 @@ pub struct NrtAlertRuleProperties {
     #[doc = "The query that creates alerts for this rule."]
     pub query: String,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The display name for alerts created by this alert rule."]
     #[serde(rename = "displayName")]
@@ -7269,10 +7646,19 @@ impl OperationsList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permissions {
     #[doc = "Resource provider permissions required for the connector"]
-    #[serde(rename = "resourceProvider", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceProvider",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_provider: Vec<serde_json::Value>,
     #[doc = "Customs permissions required for the connector"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customs: Vec<serde_json::Value>,
 }
 impl Permissions {
@@ -7439,7 +7825,11 @@ pub struct Repo {
     #[serde(rename = "fullName", default, skip_serializing_if = "Option::is_none")]
     pub full_name: Option<String>,
     #[doc = "Array of branches."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub branches: Vec<String>,
 }
 impl Repo {
@@ -7520,7 +7910,12 @@ pub struct Repository {
     #[serde(rename = "deploymentLogsUrl", default, skip_serializing_if = "Option::is_none")]
     pub deployment_logs_url: Option<String>,
     #[doc = "Dictionary of source control content type and path mapping."]
-    #[serde(rename = "pathMapping", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pathMapping",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path_mapping: Vec<ContentPathMap>,
 }
 impl Repository {
@@ -7831,10 +8226,18 @@ pub struct ScheduledAlertRuleProperties {
     #[serde(rename = "suppressionEnabled")]
     pub suppression_enabled: bool,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "Incident Configuration property bag."]
     #[serde(rename = "incidentConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -7894,7 +8297,12 @@ pub struct ScheduledAlertRuleTemplateProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The required data connectors for this template"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<AlertRuleTemplateDataSource>,
     #[doc = "The alert rule template status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7918,10 +8326,18 @@ pub struct ScheduledAlertRuleTemplateProperties {
     #[serde(rename = "triggerThreshold", default, skip_serializing_if = "Option::is_none")]
     pub trigger_threshold: Option<i32>,
     #[doc = "The tactics of the alert rule template"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The version of this template - in format <a.b.c>, where all are numbers. For example <1.0.2>."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7976,7 +8392,12 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "confidenceLevel", default, skip_serializing_if = "Option::is_none")]
     pub confidence_level: Option<security_alert_properties::ConfidenceLevel>,
     #[doc = "The confidence reasons"]
-    #[serde(rename = "confidenceReasons", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "confidenceReasons",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub confidence_reasons: Vec<serde_json::Value>,
     #[doc = "The confidence score of the alert."]
     #[serde(rename = "confidenceScore", default, skip_serializing_if = "Option::is_none")]
@@ -8009,7 +8430,12 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "productVersion", default, skip_serializing_if = "Option::is_none")]
     pub product_version: Option<String>,
     #[doc = "Manual action items to take to remediate the alert."]
-    #[serde(rename = "remediationSteps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "remediationSteps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub remediation_steps: Vec<String>,
     #[doc = "The severity of the alert"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8024,7 +8450,11 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "systemAlertId", default, skip_serializing_if = "Option::is_none")]
     pub system_alert_id: Option<String>,
     #[doc = "The tactics of the alert"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The time the alert was generated."]
     #[serde(rename = "timeGenerated", default, with = "azure_core::date::rfc3339::option")]
@@ -8036,7 +8466,12 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "alertLink", default, skip_serializing_if = "Option::is_none")]
     pub alert_link: Option<String>,
     #[doc = "The list of resource identifiers of the alert."]
-    #[serde(rename = "resourceIdentifiers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceIdentifiers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_identifiers: Vec<serde_json::Value>,
 }
 impl SecurityAlertProperties {
@@ -8311,7 +8746,12 @@ pub struct SecurityMlAnalyticsSettingsDataSource {
     #[serde(rename = "connectorId", default, skip_serializing_if = "Option::is_none")]
     pub connector_id: Option<String>,
     #[doc = "The data types used by the security ml analytics settings"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<String>,
 }
 impl SecurityMlAnalyticsSettingsDataSource {
@@ -8672,10 +9112,20 @@ pub struct TeamProperties {
     #[serde(rename = "teamDescription", default, skip_serializing_if = "Option::is_none")]
     pub team_description: Option<String>,
     #[doc = "List of member IDs to add to the team"]
-    #[serde(rename = "memberIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "memberIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub member_ids: Vec<String>,
     #[doc = "List of group IDs to add their members to the team"]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
 }
 impl TeamProperties {
@@ -8726,10 +9176,18 @@ pub struct ThreatIntelligenceAlertRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl ThreatIntelligenceAlertRuleProperties {
@@ -8786,7 +9244,12 @@ pub mod threat_intelligence_alert_rule_template {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ThreatIntelligenceAppendTags {
     #[doc = "List of tags to be appended."]
-    #[serde(rename = "threatIntelligenceTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatIntelligenceTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_intelligence_tags: Vec<String>,
 }
 impl ThreatIntelligenceAppendTags {
@@ -8840,22 +9303,49 @@ pub struct ThreatIntelligenceFilteringCriteria {
     #[serde(rename = "includeDisabled", default, skip_serializing_if = "Option::is_none")]
     pub include_disabled: Option<bool>,
     #[doc = "Columns to sort by and sorting order"]
-    #[serde(rename = "sortBy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sortBy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sort_by: Vec<ThreatIntelligenceSortingCriteria>,
     #[doc = "Sources of threat intelligence indicators"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sources: Vec<String>,
     #[doc = "Pattern types"]
-    #[serde(rename = "patternTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern_types: Vec<String>,
     #[doc = "Threat types of threat intelligence indicators"]
-    #[serde(rename = "threatTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_types: Vec<String>,
     #[doc = "Ids of threat intelligence indicators"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ids: Vec<String>,
     #[doc = "Keywords for searching threat intelligence indicators"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keywords: Vec<String>,
     #[doc = "Skip token."]
     #[serde(rename = "skipToken", default, skip_serializing_if = "Option::is_none")]
@@ -8876,7 +9366,11 @@ pub struct ThreatIntelligenceGranularMarkingModel {
     #[serde(rename = "markingRef", default, skip_serializing_if = "Option::is_none")]
     pub marking_ref: Option<i32>,
     #[doc = "granular marking model selectors"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selectors: Vec<String>,
 }
 impl ThreatIntelligenceGranularMarkingModel {
@@ -8907,7 +9401,12 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(flatten)]
     pub entity_common_properties: EntityCommonProperties,
     #[doc = "List of tags"]
-    #[serde(rename = "threatIntelligenceTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatIntelligenceTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_intelligence_tags: Vec<String>,
     #[doc = "Last updated time in UTC"]
     #[serde(rename = "lastUpdatedTimeUtc", default, skip_serializing_if = "Option::is_none")]
@@ -8922,7 +9421,12 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Indicator types of threat intelligence entities"]
-    #[serde(rename = "indicatorTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "indicatorTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub indicator_types: Vec<String>,
     #[doc = "Pattern of a threat intelligence entity"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8934,10 +9438,20 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(rename = "patternVersion", default, skip_serializing_if = "Option::is_none")]
     pub pattern_version: Option<String>,
     #[doc = "Kill chain phases"]
-    #[serde(rename = "killChainPhases", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "killChainPhases",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kill_chain_phases: Vec<ThreatIntelligenceKillChainPhase>,
     #[doc = "Parsed patterns"]
-    #[serde(rename = "parsedPattern", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parsedPattern",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parsed_pattern: Vec<ThreatIntelligenceParsedPattern>,
     #[doc = "External ID of threat intelligence entity"]
     #[serde(rename = "externalId", default, skip_serializing_if = "Option::is_none")]
@@ -8952,13 +9466,27 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(rename = "externalLastUpdatedTimeUtc", default, skip_serializing_if = "Option::is_none")]
     pub external_last_updated_time_utc: Option<String>,
     #[doc = "External References"]
-    #[serde(rename = "externalReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_references: Vec<ThreatIntelligenceExternalReference>,
     #[doc = "Granular Markings"]
-    #[serde(rename = "granularMarkings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "granularMarkings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub granular_markings: Vec<ThreatIntelligenceGranularMarkingModel>,
     #[doc = "Labels  of threat intelligence entity"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "Is threat intelligence entity revoked"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8967,13 +9495,23 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub confidence: Option<i32>,
     #[doc = "Threat intelligence entity object marking references"]
-    #[serde(rename = "objectMarkingRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "objectMarkingRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub object_marking_refs: Vec<String>,
     #[doc = "Language of threat intelligence entity"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub language: Option<String>,
     #[doc = "Threat types"]
-    #[serde(rename = "threatTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_types: Vec<String>,
     #[doc = "Valid from"]
     #[serde(rename = "validFrom", default, skip_serializing_if = "Option::is_none")]
@@ -9054,13 +9592,28 @@ pub struct ThreatIntelligenceMetric {
     #[serde(rename = "lastUpdatedTimeUtc", default, skip_serializing_if = "Option::is_none")]
     pub last_updated_time_utc: Option<String>,
     #[doc = "Threat type metrics"]
-    #[serde(rename = "threatTypeMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatTypeMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_type_metrics: Vec<ThreatIntelligenceMetricEntity>,
     #[doc = "Pattern type metrics"]
-    #[serde(rename = "patternTypeMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternTypeMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern_type_metrics: Vec<ThreatIntelligenceMetricEntity>,
     #[doc = "Source metrics"]
-    #[serde(rename = "sourceMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_metrics: Vec<ThreatIntelligenceMetricEntity>,
 }
 impl ThreatIntelligenceMetric {
@@ -9113,7 +9666,12 @@ pub struct ThreatIntelligenceParsedPattern {
     #[serde(rename = "patternTypeKey", default, skip_serializing_if = "Option::is_none")]
     pub pattern_type_key: Option<String>,
     #[doc = "Pattern type keys"]
-    #[serde(rename = "patternTypeValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternTypeValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern_type_values: Vec<ThreatIntelligenceParsedPatternTypeValue>,
 }
 impl ThreatIntelligenceParsedPattern {
@@ -9424,7 +9982,11 @@ pub struct TimelineResultsMetadata {
     #[doc = "timeline aggregation per kind"]
     pub aggregations: Vec<TimelineAggregation>,
     #[doc = "information about the failure queries"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<TimelineError>,
 }
 impl TimelineResultsMetadata {
@@ -9498,7 +10060,12 @@ impl Serialize for UebaDataSources {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UebaProperties {
     #[doc = "The relevant data sources that enriched by ueba"]
-    #[serde(rename = "dataSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_sources: Vec<UebaDataSources>,
 }
 impl UebaProperties {
@@ -9721,7 +10288,11 @@ pub struct WatchlistProperties {
     #[serde(rename = "isDeleted", default, skip_serializing_if = "Option::is_none")]
     pub is_deleted: Option<bool>,
     #[doc = "List of labels relevant to this watchlist"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
     #[doc = "The default duration of a watchlist (in ISO 8601 duration format)"]
     #[serde(rename = "defaultDuration", default, skip_serializing_if = "Option::is_none")]
@@ -9859,10 +10430,18 @@ impl MetadataAuthor {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetadataCategories {
     #[doc = "domain for the solution content item"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domains: Vec<String>,
     #[doc = "Industry verticals for the solution content item"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub verticals: Vec<String>,
 }
 impl MetadataCategories {
@@ -9892,7 +10471,11 @@ pub struct MetadataDependencies {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<metadata_dependencies::Operator>,
     #[doc = "This is the list of dependencies we must fulfill, according to the AND/OR operator"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub criteria: Vec<MetadataDependencies>,
 }
 impl MetadataDependencies {
diff --git a/services/mgmt/securityinsights/src/package_preview_2022_06/models.rs b/services/mgmt/securityinsights/src/package_preview_2022_06/models.rs
index 8ffab3b367..4fbff088cf 100644
--- a/services/mgmt/securityinsights/src/package_preview_2022_06/models.rs
+++ b/services/mgmt/securityinsights/src/package_preview_2022_06/models.rs
@@ -352,7 +352,12 @@ pub struct ActivityEntityQueriesProperties {
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "List of the fields of the source entity that are required to run the query"]
-    #[serde(rename = "requiredInputFieldsSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredInputFieldsSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_input_fields_sets: Vec<Vec<String>>,
     #[doc = "The query applied only to entities matching to all filters"]
     #[serde(rename = "entitiesFilter", default, skip_serializing_if = "Option::is_none")]
@@ -440,13 +445,23 @@ pub struct ActivityEntityQueryTemplateProperties {
     #[serde(rename = "queryDefinitions", default, skip_serializing_if = "Option::is_none")]
     pub query_definitions: Option<activity_entity_query_template_properties::QueryDefinitions>,
     #[doc = "List of required data types for the given entity query template"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<DataTypeDefinitions>,
     #[doc = "The type of the entity"]
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "List of the fields of the source entity that are required to run the query"]
-    #[serde(rename = "requiredInputFieldsSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredInputFieldsSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_input_fields_sets: Vec<Vec<String>>,
     #[doc = "The query applied only to entities matching to all filters"]
     #[serde(rename = "entitiesFilter", default, skip_serializing_if = "Option::is_none")]
@@ -632,7 +647,12 @@ pub struct AlertRuleTemplateDataSource {
     #[serde(rename = "connectorId", default, skip_serializing_if = "Option::is_none")]
     pub connector_id: Option<String>,
     #[doc = "The data types used by the alert rule template"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<String>,
 }
 impl AlertRuleTemplateDataSource {
@@ -659,7 +679,12 @@ pub struct AlertRuleTemplatePropertiesBase {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The required data sources for this template"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<AlertRuleTemplateDataSource>,
     #[doc = "The alert rule template status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -715,10 +740,18 @@ pub struct AlertRuleTemplateWithMitreProperties {
     #[serde(flatten)]
     pub alert_rule_template_properties_base: AlertRuleTemplatePropertiesBase,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl AlertRuleTemplateWithMitreProperties {
@@ -887,13 +920,26 @@ pub struct AnomalySecurityMlAnalyticsSettingsProperties {
     #[serde(rename = "lastModifiedUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_modified_utc: Option<time::OffsetDateTime>,
     #[doc = "The required data sources for this SecurityMLAnalyticsSettings"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<SecurityMlAnalyticsSettingsDataSource>,
     #[doc = "The tactics of the SecurityMLAnalyticsSettings"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the SecurityMLAnalyticsSettings"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The anomaly version of the AnomalySecurityMLAnalyticsSettings."]
     #[serde(rename = "anomalyVersion")]
@@ -1013,10 +1059,18 @@ pub struct AnomalyTimelineItem {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub intent: Option<String>,
     #[doc = "The techniques of the anomaly."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The reasons that cause the anomaly."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons: Vec<String>,
 }
 impl AnomalyTimelineItem {
@@ -1724,7 +1778,12 @@ pub struct AutomationRulePropertyValuesChangedCondition {
     pub change_type: Option<AutomationRulePropertyChangedConditionSupportedChangedType>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<AutomationRulePropertyConditionSupportedOperator>,
-    #[serde(rename = "propertyValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_values: Vec<String>,
 }
 impl AutomationRulePropertyValuesChangedCondition {
@@ -1739,7 +1798,12 @@ pub struct AutomationRulePropertyValuesCondition {
     pub property_name: Option<AutomationRulePropertyConditionSupportedProperty>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<AutomationRulePropertyConditionSupportedOperator>,
-    #[serde(rename = "propertyValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_values: Vec<String>,
 }
 impl AutomationRulePropertyValuesCondition {
@@ -1777,7 +1841,11 @@ pub struct AutomationRuleTriggeringLogic {
     #[serde(rename = "triggersWhen")]
     pub triggers_when: TriggersWhen,
     #[doc = "The conditions to evaluate to determine if the automation rule should be triggered on a given object."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<AutomationRuleCondition>,
 }
 impl AutomationRuleTriggeringLogic {
@@ -1793,7 +1861,11 @@ impl AutomationRuleTriggeringLogic {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AutomationRulesList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AutomationRule>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1992,7 +2064,12 @@ pub struct BookmarkEntityMappings {
     #[serde(rename = "entityType", default, skip_serializing_if = "Option::is_none")]
     pub entity_type: Option<String>,
     #[doc = "Array of fields mapping for that entity type"]
-    #[serde(rename = "fieldMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_mappings: Vec<EntityFieldMapping>,
 }
 impl BookmarkEntityMappings {
@@ -2039,10 +2116,18 @@ pub mod bookmark_expand_response {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Value {
         #[doc = "Array of the expansion result entities."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub entities: Vec<Entity>,
         #[doc = "Array of expansion result connected entities"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub edges: Vec<ConnectedEntity>,
     }
     impl Value {
@@ -2084,7 +2169,11 @@ pub struct BookmarkProperties {
     #[serde(rename = "displayName")]
     pub display_name: String,
     #[doc = "List of labels relevant to this bookmark"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
     #[doc = "The notes of the bookmark"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2116,10 +2205,18 @@ pub struct BookmarkProperties {
     #[serde(rename = "entityMappings", default, skip_serializing_if = "Option::is_none")]
     pub entity_mappings: Option<EntityMappingsList>,
     #[doc = "A list of relevant mitre attacks"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "A list of relevant mitre techniques"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<AttackTechnique>,
 }
 impl BookmarkProperties {
@@ -2171,7 +2268,11 @@ pub struct BookmarkTimelineItem {
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
     pub created_by: Option<UserInfo>,
     #[doc = "List of labels relevant to this bookmark"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
 }
 impl BookmarkTimelineItem {
@@ -2639,7 +2740,11 @@ pub struct ConnectivityCriteria {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<connectivity_criteria::Type>,
     #[doc = "Queries for checking connectivity"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl ConnectivityCriteria {
@@ -2958,7 +3063,12 @@ pub struct DataConnectorConnectBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub password: Option<String>,
     #[doc = ""]
-    #[serde(rename = "requestConfigUserInputValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestConfigUserInputValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_config_user_input_values: Vec<serde_json::Value>,
 }
 impl DataConnectorConnectBody {
@@ -3543,7 +3653,11 @@ pub struct EnrichmentDomainWhoisContact {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub org: Option<String>,
     #[doc = "A list describing the street address for this contact"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub street: Vec<String>,
     #[doc = "The city for this contact"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3603,10 +3717,19 @@ pub struct EnrichmentDomainWhoisDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub contacts: Option<EnrichmentDomainWhoisContacts>,
     #[doc = "A list of name servers associated with this domain"]
-    #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nameServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name_servers: Vec<String>,
     #[doc = "The set of status flags for this whois record"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<String>,
 }
 impl EnrichmentDomainWhoisDetails {
@@ -3738,7 +3861,12 @@ impl EntityAnalytics {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EntityAnalyticsProperties {
     #[doc = "The relevant entity providers that are synced"]
-    #[serde(rename = "entityProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "entityProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entity_providers: Vec<EntityProviders>,
 }
 impl EntityAnalyticsProperties {
@@ -3815,10 +3943,18 @@ pub mod entity_expand_response {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Value {
         #[doc = "Array of the expansion result entities."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub entities: Vec<Entity>,
         #[doc = "Array of edges that connects the entity to the list of entities."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub edges: Vec<EntityEdges>,
     }
     impl Value {
@@ -3855,7 +3991,12 @@ pub struct EntityGetInsightsParameters {
     #[serde(rename = "addDefaultExtendedTimeRange", default, skip_serializing_if = "Option::is_none")]
     pub add_default_extended_time_range: Option<bool>,
     #[doc = "List of Insights Query Id. If empty, default value is all insights of this entity"]
-    #[serde(rename = "insightQueryIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "insightQueryIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub insight_query_ids: Vec<String>,
 }
 impl EntityGetInsightsParameters {
@@ -3875,7 +4016,11 @@ pub struct EntityGetInsightsResponse {
     #[serde(rename = "metaData", default, skip_serializing_if = "Option::is_none")]
     pub meta_data: Option<GetInsightsResultsMetadata>,
     #[doc = "The insights result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityInsightItem>,
 }
 impl EntityGetInsightsResponse {
@@ -4049,7 +4194,12 @@ pub struct EntityInsightItem {
     #[serde(rename = "tableQueryResults", default, skip_serializing_if = "Option::is_none")]
     pub table_query_results: Option<InsightsTableResult>,
     #[doc = "Query results for table insights query."]
-    #[serde(rename = "chartQueryResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "chartQueryResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub chart_query_results: Vec<InsightsTableResult>,
 }
 impl EntityInsightItem {
@@ -4102,7 +4252,12 @@ pub struct EntityMapping {
     #[serde(rename = "entityType", default, skip_serializing_if = "Option::is_none")]
     pub entity_type: Option<EntityMappingType>,
     #[doc = "array of field mappings for the given entity mapping"]
-    #[serde(rename = "fieldMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_mappings: Vec<FieldMapping>,
 }
 impl EntityMapping {
@@ -4266,13 +4421,23 @@ impl EntityQueryItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EntityQueryItemProperties {
     #[doc = "Data types for template"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<serde_json::Value>,
     #[doc = "The type of the entity"]
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "Data types for template"]
-    #[serde(rename = "requiredInputFieldsSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredInputFieldsSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_input_fields_sets: Vec<Vec<String>>,
     #[doc = "The query applied only to entities matching to all filters"]
     #[serde(rename = "entitiesFilter", default, skip_serializing_if = "Option::is_none")]
@@ -4469,7 +4634,11 @@ impl Serialize for EntityTimelineKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct EntityTimelineParameters {
     #[doc = "Array of timeline Item kinds."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kinds: Vec<EntityTimelineKind>,
     #[doc = "The start timeline date, so the results returned are after this date."]
     #[serde(rename = "startTime", with = "azure_core::date::rfc3339")]
@@ -4498,7 +4667,11 @@ pub struct EntityTimelineResponse {
     #[serde(rename = "metaData", default, skip_serializing_if = "Option::is_none")]
     pub meta_data: Option<TimelineResultsMetadata>,
     #[doc = "The timeline result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityTimelineItem>,
 }
 impl EntityTimelineResponse {
@@ -4559,7 +4732,12 @@ impl EventGroupingSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpansionEntityQueriesProperties {
     #[doc = "List of the data sources that are required to run the query"]
-    #[serde(rename = "dataSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_sources: Vec<String>,
     #[doc = "The query display name"]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
@@ -4568,10 +4746,20 @@ pub struct ExpansionEntityQueriesProperties {
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "List of the fields of the source entity that are required to run the query"]
-    #[serde(rename = "inputFields", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputFields",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_fields: Vec<String>,
     #[doc = "List of the desired output types to be constructed from the result"]
-    #[serde(rename = "outputEntityTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputEntityTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_entity_types: Vec<EntityInnerType>,
     #[doc = "The template query string to be parsed and formatted"]
     #[serde(rename = "queryTemplate", default, skip_serializing_if = "Option::is_none")]
@@ -4628,7 +4816,11 @@ impl ExpansionResultAggregation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpansionResultsMetadata {
     #[doc = "Information of the aggregated nodes in the expansion result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aggregations: Vec<ExpansionResultAggregation>,
 }
 impl ExpansionResultsMetadata {
@@ -4712,10 +4904,20 @@ pub struct FusionAlertRuleProperties {
     #[doc = "Determines whether this alert rule is enabled or disabled."]
     pub enabled: bool,
     #[doc = "Configuration for all supported source signals in fusion detection."]
-    #[serde(rename = "sourceSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_settings: Vec<FusionSourceSettings>,
     #[doc = "Configuration to exclude scenarios in fusion detection."]
-    #[serde(rename = "scenarioExclusionPatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scenarioExclusionPatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scenario_exclusion_patterns: Vec<FusionScenarioExclusionPattern>,
     #[doc = "The last time that this alert has been modified."]
     #[serde(rename = "lastModifiedUtc", default, with = "azure_core::date::rfc3339::option")]
@@ -4724,10 +4926,18 @@ pub struct FusionAlertRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl FusionAlertRuleProperties {
@@ -4782,7 +4992,12 @@ pub struct FusionAlertRuleTemplateProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The required data connectors for this template"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<AlertRuleTemplateDataSource>,
     #[doc = "The alert rule template status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4791,13 +5006,26 @@ pub struct FusionAlertRuleTemplateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule template"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "All supported source signal configurations consumed in fusion detection."]
-    #[serde(rename = "sourceSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_settings: Vec<FusionTemplateSourceSetting>,
 }
 impl FusionAlertRuleTemplateProperties {
@@ -4832,7 +5060,12 @@ pub struct FusionSourceSettings {
     #[serde(rename = "sourceName")]
     pub source_name: String,
     #[doc = "Configuration for all source subtypes under this source signal consumed in fusion detection."]
-    #[serde(rename = "sourceSubTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSubTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_sub_types: Vec<FusionSourceSubTypeSetting>,
 }
 impl FusionSourceSettings {
@@ -4876,7 +5109,11 @@ pub struct FusionSubTypeSeverityFilter {
     #[serde(rename = "isSupported", default, skip_serializing_if = "Option::is_none")]
     pub is_supported: Option<bool>,
     #[doc = "Individual Severity configuration settings for a given source subtype consumed in Fusion detection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<FusionSubTypeSeverityFiltersItem>,
 }
 impl FusionSubTypeSeverityFilter {
@@ -4904,7 +5141,12 @@ pub struct FusionTemplateSourceSetting {
     #[serde(rename = "sourceName")]
     pub source_name: String,
     #[doc = "All supported source subtypes under this source signal consumed in fusion detection."]
-    #[serde(rename = "sourceSubTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSubTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_sub_types: Vec<FusionTemplateSourceSubType>,
 }
 impl FusionTemplateSourceSetting {
@@ -4944,7 +5186,12 @@ pub struct FusionTemplateSubTypeSeverityFilter {
     #[serde(rename = "isSupported")]
     pub is_supported: bool,
     #[doc = "List of all supported severities for this source subtype consumed in Fusion detection."]
-    #[serde(rename = "severityFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "severityFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub severity_filters: Vec<AlertSeverityEnum>,
 }
 impl FusionTemplateSubTypeSeverityFilter {
@@ -5021,7 +5268,11 @@ pub struct GetInsightsResultsMetadata {
     #[serde(rename = "totalCount")]
     pub total_count: i32,
     #[doc = "information about the failed queries"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<GetInsightsErrorKind>,
 }
 impl GetInsightsResultsMetadata {
@@ -5036,7 +5287,11 @@ impl GetInsightsResultsMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GetQueriesResponse {
     #[doc = "The query result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityQueryItem>,
 }
 impl GetQueriesResponse {
@@ -5089,13 +5344,28 @@ pub struct GroupingConfiguration {
     #[serde(rename = "matchingMethod")]
     pub matching_method: grouping_configuration::MatchingMethod,
     #[doc = "A list of entity types to group by (when matchingMethod is Selected). Only entities defined in the current alert rule may be used."]
-    #[serde(rename = "groupByEntities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByEntities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_entities: Vec<EntityMappingType>,
     #[doc = "A list of alert details to group by (when matchingMethod is Selected)"]
-    #[serde(rename = "groupByAlertDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByAlertDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_alert_details: Vec<String>,
     #[doc = "A list of custom details keys to group by (when matchingMethod is Selected). Only keys defined in the current alert rule may be used."]
-    #[serde(rename = "groupByCustomDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByCustomDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_custom_details: Vec<String>,
 }
 impl GroupingConfiguration {
@@ -5190,7 +5460,11 @@ pub struct HuntingBookmarkProperties {
     #[serde(rename = "eventTime", default, with = "azure_core::date::rfc3339::option")]
     pub event_time: Option<time::OffsetDateTime>,
     #[doc = "List of labels relevant to this bookmark"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
     #[doc = "The notes of the bookmark"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5255,16 +5529,29 @@ pub struct IncidentAdditionalData {
     #[serde(rename = "commentsCount", default, skip_serializing_if = "Option::is_none")]
     pub comments_count: Option<i32>,
     #[doc = "List of product names of alerts in the incident"]
-    #[serde(rename = "alertProductNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alertProductNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alert_product_names: Vec<String>,
     #[doc = "The provider incident url to the incident in Microsoft 365 Defender portal"]
     #[serde(rename = "providerIncidentUrl", default, skip_serializing_if = "Option::is_none")]
     pub provider_incident_url: Option<String>,
     #[doc = "The tactics associated with incident"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques associated with incident's tactics'"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl IncidentAdditionalData {
@@ -5459,10 +5746,19 @@ impl IncidentConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IncidentEntitiesResponse {
     #[doc = "Array of the incident related entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entities: Vec<Entity>,
     #[doc = "The metadata from the incident related entities results."]
-    #[serde(rename = "metaData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metaData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meta_data: Vec<IncidentEntitiesResultsMetadata>,
 }
 impl IncidentEntitiesResponse {
@@ -5677,7 +5973,11 @@ pub struct IncidentProperties {
     #[serde(rename = "incidentNumber", default, skip_serializing_if = "Option::is_none")]
     pub incident_number: Option<i32>,
     #[doc = "List of labels relevant to this incident"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<IncidentLabel>,
     #[doc = "The name of the source provider that generated the incident"]
     #[serde(rename = "providerName", default, skip_serializing_if = "Option::is_none")]
@@ -5695,7 +5995,12 @@ pub struct IncidentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub owner: Option<IncidentOwnerInfo>,
     #[doc = "List of resource ids of Analytic rules related to the incident"]
-    #[serde(rename = "relatedAnalyticRuleIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "relatedAnalyticRuleIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub related_analytic_rule_ids: Vec<String>,
     #[doc = "The severity of the incident"]
     pub severity: IncidentSeverityEnum,
@@ -5754,7 +6059,11 @@ pub struct IncidentPropertiesAction {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub owner: Option<IncidentOwnerInfo>,
     #[doc = "List of labels to add to the incident."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<IncidentLabel>,
 }
 impl IncidentPropertiesAction {
@@ -5900,10 +6209,20 @@ pub mod insight_query_item_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct TableQuery {
         #[doc = "List of insight column definitions."]
-        #[serde(rename = "columnsDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "columnsDefinitions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub columns_definitions: Vec<serde_json::Value>,
         #[doc = "List of insight queries definitions."]
-        #[serde(rename = "queriesDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "queriesDefinitions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries_definitions: Vec<serde_json::Value>,
     }
     impl TableQuery {
@@ -5958,10 +6277,18 @@ pub mod insight_query_item_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InsightsTableResult {
     #[doc = "Columns Metadata of the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<serde_json::Value>,
     #[doc = "Rows data of the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rows: Vec<Vec<String>>,
 }
 impl InsightsTableResult {
@@ -5979,7 +6306,11 @@ pub struct InstructionSteps {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Instruction step details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instructions: Vec<serde_json::Value>,
 }
 impl InstructionSteps {
@@ -6241,10 +6572,18 @@ pub struct MlBehaviorAnalyticsAlertRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl MlBehaviorAnalyticsAlertRuleProperties {
@@ -6543,16 +6882,31 @@ impl MicrosoftSecurityIncidentCreationAlertRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct MicrosoftSecurityIncidentCreationAlertRuleCommonProperties {
     #[doc = "the alerts' displayNames on which the cases will be generated"]
-    #[serde(rename = "displayNamesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_filter: Vec<String>,
     #[doc = "the alerts' displayNames on which the cases will not be generated"]
-    #[serde(rename = "displayNamesExcludeFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesExcludeFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_exclude_filter: Vec<String>,
     #[doc = "The alerts' productName on which the cases will be generated"]
     #[serde(rename = "productFilter")]
     pub product_filter: MicrosoftSecurityProductName,
     #[doc = "the alerts' severities on which the cases will be generated"]
-    #[serde(rename = "severitiesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "severitiesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub severities_filter: Vec<AlertSeverityEnum>,
 }
 impl MicrosoftSecurityIncidentCreationAlertRuleCommonProperties {
@@ -6624,16 +6978,31 @@ pub struct MicrosoftSecurityIncidentCreationAlertRuleTemplateProperties {
     #[serde(flatten)]
     pub alert_rule_template_properties_base: AlertRuleTemplatePropertiesBase,
     #[doc = "the alerts' displayNames on which the cases will be generated"]
-    #[serde(rename = "displayNamesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_filter: Vec<String>,
     #[doc = "the alerts' displayNames on which the cases will not be generated"]
-    #[serde(rename = "displayNamesExcludeFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesExcludeFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_exclude_filter: Vec<String>,
     #[doc = "The alerts' productName on which the cases will be generated"]
     #[serde(rename = "productFilter", default, skip_serializing_if = "Option::is_none")]
     pub product_filter: Option<MicrosoftSecurityProductName>,
     #[doc = "the alerts' severities on which the cases will be generated"]
-    #[serde(rename = "severitiesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "severitiesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub severities_filter: Vec<AlertSeverityEnum>,
 }
 impl MicrosoftSecurityIncidentCreationAlertRuleTemplateProperties {
@@ -6758,10 +7127,18 @@ pub struct NrtAlertRuleProperties {
     #[doc = "The query that creates alerts for this rule."]
     pub query: String,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The display name for alerts created by this alert rule."]
     #[serde(rename = "displayName")]
@@ -7278,10 +7655,19 @@ impl OperationsList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permissions {
     #[doc = "Resource provider permissions required for the connector"]
-    #[serde(rename = "resourceProvider", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceProvider",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_provider: Vec<serde_json::Value>,
     #[doc = "Customs permissions required for the connector"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customs: Vec<serde_json::Value>,
 }
 impl Permissions {
@@ -7448,7 +7834,11 @@ pub struct Repo {
     #[serde(rename = "fullName", default, skip_serializing_if = "Option::is_none")]
     pub full_name: Option<String>,
     #[doc = "Array of branches."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub branches: Vec<String>,
 }
 impl Repo {
@@ -7529,7 +7919,12 @@ pub struct Repository {
     #[serde(rename = "deploymentLogsUrl", default, skip_serializing_if = "Option::is_none")]
     pub deployment_logs_url: Option<String>,
     #[doc = "Dictionary of source control content type and path mapping."]
-    #[serde(rename = "pathMapping", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pathMapping",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path_mapping: Vec<ContentPathMap>,
 }
 impl Repository {
@@ -7840,10 +8235,18 @@ pub struct ScheduledAlertRuleProperties {
     #[serde(rename = "suppressionEnabled")]
     pub suppression_enabled: bool,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "Incident Configuration property bag."]
     #[serde(rename = "incidentConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -7903,7 +8306,12 @@ pub struct ScheduledAlertRuleTemplateProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The required data connectors for this template"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<AlertRuleTemplateDataSource>,
     #[doc = "The alert rule template status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7927,10 +8335,18 @@ pub struct ScheduledAlertRuleTemplateProperties {
     #[serde(rename = "triggerThreshold", default, skip_serializing_if = "Option::is_none")]
     pub trigger_threshold: Option<i32>,
     #[doc = "The tactics of the alert rule template"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The version of this template - in format <a.b.c>, where all are numbers. For example <1.0.2>."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7985,7 +8401,12 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "confidenceLevel", default, skip_serializing_if = "Option::is_none")]
     pub confidence_level: Option<security_alert_properties::ConfidenceLevel>,
     #[doc = "The confidence reasons"]
-    #[serde(rename = "confidenceReasons", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "confidenceReasons",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub confidence_reasons: Vec<serde_json::Value>,
     #[doc = "The confidence score of the alert."]
     #[serde(rename = "confidenceScore", default, skip_serializing_if = "Option::is_none")]
@@ -8018,7 +8439,12 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "productVersion", default, skip_serializing_if = "Option::is_none")]
     pub product_version: Option<String>,
     #[doc = "Manual action items to take to remediate the alert."]
-    #[serde(rename = "remediationSteps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "remediationSteps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub remediation_steps: Vec<String>,
     #[doc = "The severity of the alert"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8033,7 +8459,11 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "systemAlertId", default, skip_serializing_if = "Option::is_none")]
     pub system_alert_id: Option<String>,
     #[doc = "The tactics of the alert"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The time the alert was generated."]
     #[serde(rename = "timeGenerated", default, with = "azure_core::date::rfc3339::option")]
@@ -8045,7 +8475,12 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "alertLink", default, skip_serializing_if = "Option::is_none")]
     pub alert_link: Option<String>,
     #[doc = "The list of resource identifiers of the alert."]
-    #[serde(rename = "resourceIdentifiers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceIdentifiers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_identifiers: Vec<serde_json::Value>,
 }
 impl SecurityAlertProperties {
@@ -8320,7 +8755,12 @@ pub struct SecurityMlAnalyticsSettingsDataSource {
     #[serde(rename = "connectorId", default, skip_serializing_if = "Option::is_none")]
     pub connector_id: Option<String>,
     #[doc = "The data types used by the security ml analytics settings"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<String>,
 }
 impl SecurityMlAnalyticsSettingsDataSource {
@@ -8681,10 +9121,20 @@ pub struct TeamProperties {
     #[serde(rename = "teamDescription", default, skip_serializing_if = "Option::is_none")]
     pub team_description: Option<String>,
     #[doc = "List of member IDs to add to the team"]
-    #[serde(rename = "memberIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "memberIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub member_ids: Vec<String>,
     #[doc = "List of group IDs to add their members to the team"]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
 }
 impl TeamProperties {
@@ -8735,10 +9185,18 @@ pub struct ThreatIntelligenceAlertRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl ThreatIntelligenceAlertRuleProperties {
@@ -8795,7 +9253,12 @@ pub mod threat_intelligence_alert_rule_template {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ThreatIntelligenceAppendTags {
     #[doc = "List of tags to be appended."]
-    #[serde(rename = "threatIntelligenceTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatIntelligenceTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_intelligence_tags: Vec<String>,
 }
 impl ThreatIntelligenceAppendTags {
@@ -8849,22 +9312,49 @@ pub struct ThreatIntelligenceFilteringCriteria {
     #[serde(rename = "includeDisabled", default, skip_serializing_if = "Option::is_none")]
     pub include_disabled: Option<bool>,
     #[doc = "Columns to sort by and sorting order"]
-    #[serde(rename = "sortBy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sortBy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sort_by: Vec<ThreatIntelligenceSortingCriteria>,
     #[doc = "Sources of threat intelligence indicators"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sources: Vec<String>,
     #[doc = "Pattern types"]
-    #[serde(rename = "patternTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern_types: Vec<String>,
     #[doc = "Threat types of threat intelligence indicators"]
-    #[serde(rename = "threatTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_types: Vec<String>,
     #[doc = "Ids of threat intelligence indicators"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ids: Vec<String>,
     #[doc = "Keywords for searching threat intelligence indicators"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keywords: Vec<String>,
     #[doc = "Skip token."]
     #[serde(rename = "skipToken", default, skip_serializing_if = "Option::is_none")]
@@ -8885,7 +9375,11 @@ pub struct ThreatIntelligenceGranularMarkingModel {
     #[serde(rename = "markingRef", default, skip_serializing_if = "Option::is_none")]
     pub marking_ref: Option<i32>,
     #[doc = "granular marking model selectors"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selectors: Vec<String>,
 }
 impl ThreatIntelligenceGranularMarkingModel {
@@ -8916,7 +9410,12 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(flatten)]
     pub entity_common_properties: EntityCommonProperties,
     #[doc = "List of tags"]
-    #[serde(rename = "threatIntelligenceTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatIntelligenceTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_intelligence_tags: Vec<String>,
     #[doc = "Last updated time in UTC"]
     #[serde(rename = "lastUpdatedTimeUtc", default, skip_serializing_if = "Option::is_none")]
@@ -8931,7 +9430,12 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Indicator types of threat intelligence entities"]
-    #[serde(rename = "indicatorTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "indicatorTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub indicator_types: Vec<String>,
     #[doc = "Pattern of a threat intelligence entity"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8943,10 +9447,20 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(rename = "patternVersion", default, skip_serializing_if = "Option::is_none")]
     pub pattern_version: Option<String>,
     #[doc = "Kill chain phases"]
-    #[serde(rename = "killChainPhases", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "killChainPhases",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kill_chain_phases: Vec<ThreatIntelligenceKillChainPhase>,
     #[doc = "Parsed patterns"]
-    #[serde(rename = "parsedPattern", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parsedPattern",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parsed_pattern: Vec<ThreatIntelligenceParsedPattern>,
     #[doc = "External ID of threat intelligence entity"]
     #[serde(rename = "externalId", default, skip_serializing_if = "Option::is_none")]
@@ -8961,13 +9475,27 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(rename = "externalLastUpdatedTimeUtc", default, skip_serializing_if = "Option::is_none")]
     pub external_last_updated_time_utc: Option<String>,
     #[doc = "External References"]
-    #[serde(rename = "externalReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_references: Vec<ThreatIntelligenceExternalReference>,
     #[doc = "Granular Markings"]
-    #[serde(rename = "granularMarkings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "granularMarkings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub granular_markings: Vec<ThreatIntelligenceGranularMarkingModel>,
     #[doc = "Labels  of threat intelligence entity"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "Is threat intelligence entity revoked"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8976,13 +9504,23 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub confidence: Option<i32>,
     #[doc = "Threat intelligence entity object marking references"]
-    #[serde(rename = "objectMarkingRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "objectMarkingRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub object_marking_refs: Vec<String>,
     #[doc = "Language of threat intelligence entity"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub language: Option<String>,
     #[doc = "Threat types"]
-    #[serde(rename = "threatTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_types: Vec<String>,
     #[doc = "Valid from"]
     #[serde(rename = "validFrom", default, skip_serializing_if = "Option::is_none")]
@@ -9063,13 +9601,28 @@ pub struct ThreatIntelligenceMetric {
     #[serde(rename = "lastUpdatedTimeUtc", default, skip_serializing_if = "Option::is_none")]
     pub last_updated_time_utc: Option<String>,
     #[doc = "Threat type metrics"]
-    #[serde(rename = "threatTypeMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatTypeMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_type_metrics: Vec<ThreatIntelligenceMetricEntity>,
     #[doc = "Pattern type metrics"]
-    #[serde(rename = "patternTypeMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternTypeMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern_type_metrics: Vec<ThreatIntelligenceMetricEntity>,
     #[doc = "Source metrics"]
-    #[serde(rename = "sourceMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_metrics: Vec<ThreatIntelligenceMetricEntity>,
 }
 impl ThreatIntelligenceMetric {
@@ -9122,7 +9675,12 @@ pub struct ThreatIntelligenceParsedPattern {
     #[serde(rename = "patternTypeKey", default, skip_serializing_if = "Option::is_none")]
     pub pattern_type_key: Option<String>,
     #[doc = "Pattern type keys"]
-    #[serde(rename = "patternTypeValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternTypeValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern_type_values: Vec<ThreatIntelligenceParsedPatternTypeValue>,
 }
 impl ThreatIntelligenceParsedPattern {
@@ -9433,7 +9991,11 @@ pub struct TimelineResultsMetadata {
     #[doc = "timeline aggregation per kind"]
     pub aggregations: Vec<TimelineAggregation>,
     #[doc = "information about the failure queries"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<TimelineError>,
 }
 impl TimelineResultsMetadata {
@@ -9507,7 +10069,12 @@ impl Serialize for UebaDataSources {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UebaProperties {
     #[doc = "The relevant data sources that enriched by ueba"]
-    #[serde(rename = "dataSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_sources: Vec<UebaDataSources>,
 }
 impl UebaProperties {
@@ -9730,7 +10297,11 @@ pub struct WatchlistProperties {
     #[serde(rename = "isDeleted", default, skip_serializing_if = "Option::is_none")]
     pub is_deleted: Option<bool>,
     #[doc = "List of labels relevant to this watchlist"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
     #[doc = "The default duration of a watchlist (in ISO 8601 duration format)"]
     #[serde(rename = "defaultDuration", default, skip_serializing_if = "Option::is_none")]
@@ -9868,10 +10439,18 @@ impl MetadataAuthor {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetadataCategories {
     #[doc = "domain for the solution content item"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domains: Vec<String>,
     #[doc = "Industry verticals for the solution content item"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub verticals: Vec<String>,
 }
 impl MetadataCategories {
@@ -9901,7 +10480,11 @@ pub struct MetadataDependencies {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<metadata_dependencies::Operator>,
     #[doc = "This is the list of dependencies we must fulfill, according to the AND/OR operator"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub criteria: Vec<MetadataDependencies>,
 }
 impl MetadataDependencies {
diff --git a/services/mgmt/securityinsights/src/package_preview_2022_07/models.rs b/services/mgmt/securityinsights/src/package_preview_2022_07/models.rs
index 39c991f232..40987fdc14 100644
--- a/services/mgmt/securityinsights/src/package_preview_2022_07/models.rs
+++ b/services/mgmt/securityinsights/src/package_preview_2022_07/models.rs
@@ -352,7 +352,12 @@ pub struct ActivityEntityQueriesProperties {
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "List of the fields of the source entity that are required to run the query"]
-    #[serde(rename = "requiredInputFieldsSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredInputFieldsSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_input_fields_sets: Vec<Vec<String>>,
     #[doc = "The query applied only to entities matching to all filters"]
     #[serde(rename = "entitiesFilter", default, skip_serializing_if = "Option::is_none")]
@@ -440,13 +445,23 @@ pub struct ActivityEntityQueryTemplateProperties {
     #[serde(rename = "queryDefinitions", default, skip_serializing_if = "Option::is_none")]
     pub query_definitions: Option<activity_entity_query_template_properties::QueryDefinitions>,
     #[doc = "List of required data types for the given entity query template"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<DataTypeDefinitions>,
     #[doc = "The type of the entity"]
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "List of the fields of the source entity that are required to run the query"]
-    #[serde(rename = "requiredInputFieldsSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredInputFieldsSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_input_fields_sets: Vec<Vec<String>>,
     #[doc = "The query applied only to entities matching to all filters"]
     #[serde(rename = "entitiesFilter", default, skip_serializing_if = "Option::is_none")]
@@ -632,7 +647,12 @@ pub struct AlertRuleTemplateDataSource {
     #[serde(rename = "connectorId", default, skip_serializing_if = "Option::is_none")]
     pub connector_id: Option<String>,
     #[doc = "The data types used by the alert rule template"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<String>,
 }
 impl AlertRuleTemplateDataSource {
@@ -659,7 +679,12 @@ pub struct AlertRuleTemplatePropertiesBase {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The required data sources for this template"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<AlertRuleTemplateDataSource>,
     #[doc = "The alert rule template status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -715,10 +740,18 @@ pub struct AlertRuleTemplateWithMitreProperties {
     #[serde(flatten)]
     pub alert_rule_template_properties_base: AlertRuleTemplatePropertiesBase,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl AlertRuleTemplateWithMitreProperties {
@@ -887,13 +920,26 @@ pub struct AnomalySecurityMlAnalyticsSettingsProperties {
     #[serde(rename = "lastModifiedUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_modified_utc: Option<time::OffsetDateTime>,
     #[doc = "The required data sources for this SecurityMLAnalyticsSettings"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<SecurityMlAnalyticsSettingsDataSource>,
     #[doc = "The tactics of the SecurityMLAnalyticsSettings"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the SecurityMLAnalyticsSettings"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The anomaly version of the AnomalySecurityMLAnalyticsSettings."]
     #[serde(rename = "anomalyVersion")]
@@ -1013,10 +1059,18 @@ pub struct AnomalyTimelineItem {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub intent: Option<String>,
     #[doc = "The techniques of the anomaly."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The reasons that cause the anomaly."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons: Vec<String>,
 }
 impl AnomalyTimelineItem {
@@ -1728,7 +1782,12 @@ pub struct AutomationRulePropertyValuesChangedCondition {
     pub change_type: Option<AutomationRulePropertyChangedConditionSupportedChangedType>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<AutomationRulePropertyConditionSupportedOperator>,
-    #[serde(rename = "propertyValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_values: Vec<String>,
 }
 impl AutomationRulePropertyValuesChangedCondition {
@@ -1743,7 +1802,12 @@ pub struct AutomationRulePropertyValuesCondition {
     pub property_name: Option<AutomationRulePropertyConditionSupportedProperty>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<AutomationRulePropertyConditionSupportedOperator>,
-    #[serde(rename = "propertyValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_values: Vec<String>,
 }
 impl AutomationRulePropertyValuesCondition {
@@ -1781,7 +1845,11 @@ pub struct AutomationRuleTriggeringLogic {
     #[serde(rename = "triggersWhen")]
     pub triggers_when: TriggersWhen,
     #[doc = "The conditions to evaluate to determine if the automation rule should be triggered on a given object."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<AutomationRuleCondition>,
 }
 impl AutomationRuleTriggeringLogic {
@@ -1797,7 +1865,11 @@ impl AutomationRuleTriggeringLogic {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AutomationRulesList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AutomationRule>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1996,7 +2068,12 @@ pub struct BookmarkEntityMappings {
     #[serde(rename = "entityType", default, skip_serializing_if = "Option::is_none")]
     pub entity_type: Option<String>,
     #[doc = "Array of fields mapping for that entity type"]
-    #[serde(rename = "fieldMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_mappings: Vec<EntityFieldMapping>,
 }
 impl BookmarkEntityMappings {
@@ -2043,10 +2120,18 @@ pub mod bookmark_expand_response {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Value {
         #[doc = "Array of the expansion result entities."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub entities: Vec<Entity>,
         #[doc = "Array of expansion result connected entities"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub edges: Vec<ConnectedEntity>,
     }
     impl Value {
@@ -2088,7 +2173,11 @@ pub struct BookmarkProperties {
     #[serde(rename = "displayName")]
     pub display_name: String,
     #[doc = "List of labels relevant to this bookmark"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
     #[doc = "The notes of the bookmark"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2120,10 +2209,18 @@ pub struct BookmarkProperties {
     #[serde(rename = "entityMappings", default, skip_serializing_if = "Option::is_none")]
     pub entity_mappings: Option<EntityMappingsList>,
     #[doc = "A list of relevant mitre attacks"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "A list of relevant mitre techniques"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<AttackTechnique>,
 }
 impl BookmarkProperties {
@@ -2175,7 +2272,11 @@ pub struct BookmarkTimelineItem {
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
     pub created_by: Option<UserInfo>,
     #[doc = "List of labels relevant to this bookmark"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
 }
 impl BookmarkTimelineItem {
@@ -2643,7 +2744,11 @@ pub struct ConnectivityCriteria {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<connectivity_criteria::Type>,
     #[doc = "Queries for checking connectivity"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl ConnectivityCriteria {
@@ -2962,7 +3067,12 @@ pub struct DataConnectorConnectBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub password: Option<String>,
     #[doc = ""]
-    #[serde(rename = "requestConfigUserInputValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestConfigUserInputValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_config_user_input_values: Vec<serde_json::Value>,
 }
 impl DataConnectorConnectBody {
@@ -3547,7 +3657,11 @@ pub struct EnrichmentDomainWhoisContact {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub org: Option<String>,
     #[doc = "A list describing the street address for this contact"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub street: Vec<String>,
     #[doc = "The city for this contact"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3607,10 +3721,19 @@ pub struct EnrichmentDomainWhoisDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub contacts: Option<EnrichmentDomainWhoisContacts>,
     #[doc = "A list of name servers associated with this domain"]
-    #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nameServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name_servers: Vec<String>,
     #[doc = "The set of status flags for this whois record"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<String>,
 }
 impl EnrichmentDomainWhoisDetails {
@@ -3742,7 +3865,12 @@ impl EntityAnalytics {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EntityAnalyticsProperties {
     #[doc = "The relevant entity providers that are synced"]
-    #[serde(rename = "entityProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "entityProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entity_providers: Vec<EntityProviders>,
 }
 impl EntityAnalyticsProperties {
@@ -3819,10 +3947,18 @@ pub mod entity_expand_response {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Value {
         #[doc = "Array of the expansion result entities."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub entities: Vec<Entity>,
         #[doc = "Array of edges that connects the entity to the list of entities."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub edges: Vec<EntityEdges>,
     }
     impl Value {
@@ -3859,7 +3995,12 @@ pub struct EntityGetInsightsParameters {
     #[serde(rename = "addDefaultExtendedTimeRange", default, skip_serializing_if = "Option::is_none")]
     pub add_default_extended_time_range: Option<bool>,
     #[doc = "List of Insights Query Id. If empty, default value is all insights of this entity"]
-    #[serde(rename = "insightQueryIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "insightQueryIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub insight_query_ids: Vec<String>,
 }
 impl EntityGetInsightsParameters {
@@ -3879,7 +4020,11 @@ pub struct EntityGetInsightsResponse {
     #[serde(rename = "metaData", default, skip_serializing_if = "Option::is_none")]
     pub meta_data: Option<GetInsightsResultsMetadata>,
     #[doc = "The insights result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityInsightItem>,
 }
 impl EntityGetInsightsResponse {
@@ -4057,7 +4202,12 @@ pub struct EntityInsightItem {
     #[serde(rename = "tableQueryResults", default, skip_serializing_if = "Option::is_none")]
     pub table_query_results: Option<InsightsTableResult>,
     #[doc = "Query results for table insights query."]
-    #[serde(rename = "chartQueryResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "chartQueryResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub chart_query_results: Vec<InsightsTableResult>,
 }
 impl EntityInsightItem {
@@ -4110,7 +4260,12 @@ pub struct EntityMapping {
     #[serde(rename = "entityType", default, skip_serializing_if = "Option::is_none")]
     pub entity_type: Option<EntityMappingType>,
     #[doc = "array of field mappings for the given entity mapping"]
-    #[serde(rename = "fieldMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_mappings: Vec<FieldMapping>,
 }
 impl EntityMapping {
@@ -4274,13 +4429,23 @@ impl EntityQueryItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EntityQueryItemProperties {
     #[doc = "Data types for template"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<serde_json::Value>,
     #[doc = "The type of the entity"]
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "Data types for template"]
-    #[serde(rename = "requiredInputFieldsSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredInputFieldsSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_input_fields_sets: Vec<Vec<String>>,
     #[doc = "The query applied only to entities matching to all filters"]
     #[serde(rename = "entitiesFilter", default, skip_serializing_if = "Option::is_none")]
@@ -4477,7 +4642,11 @@ impl Serialize for EntityTimelineKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct EntityTimelineParameters {
     #[doc = "Array of timeline Item kinds."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kinds: Vec<EntityTimelineKind>,
     #[doc = "The start timeline date, so the results returned are after this date."]
     #[serde(rename = "startTime", with = "azure_core::date::rfc3339")]
@@ -4506,7 +4675,11 @@ pub struct EntityTimelineResponse {
     #[serde(rename = "metaData", default, skip_serializing_if = "Option::is_none")]
     pub meta_data: Option<TimelineResultsMetadata>,
     #[doc = "The timeline result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityTimelineItem>,
 }
 impl EntityTimelineResponse {
@@ -4567,7 +4740,12 @@ impl EventGroupingSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpansionEntityQueriesProperties {
     #[doc = "List of the data sources that are required to run the query"]
-    #[serde(rename = "dataSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_sources: Vec<String>,
     #[doc = "The query display name"]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
@@ -4576,10 +4754,20 @@ pub struct ExpansionEntityQueriesProperties {
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "List of the fields of the source entity that are required to run the query"]
-    #[serde(rename = "inputFields", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputFields",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_fields: Vec<String>,
     #[doc = "List of the desired output types to be constructed from the result"]
-    #[serde(rename = "outputEntityTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputEntityTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_entity_types: Vec<EntityInnerType>,
     #[doc = "The template query string to be parsed and formatted"]
     #[serde(rename = "queryTemplate", default, skip_serializing_if = "Option::is_none")]
@@ -4636,7 +4824,11 @@ impl ExpansionResultAggregation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpansionResultsMetadata {
     #[doc = "Information of the aggregated nodes in the expansion result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aggregations: Vec<ExpansionResultAggregation>,
 }
 impl ExpansionResultsMetadata {
@@ -4720,10 +4912,20 @@ pub struct FusionAlertRuleProperties {
     #[doc = "Determines whether this alert rule is enabled or disabled."]
     pub enabled: bool,
     #[doc = "Configuration for all supported source signals in fusion detection."]
-    #[serde(rename = "sourceSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_settings: Vec<FusionSourceSettings>,
     #[doc = "Configuration to exclude scenarios in fusion detection."]
-    #[serde(rename = "scenarioExclusionPatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scenarioExclusionPatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scenario_exclusion_patterns: Vec<FusionScenarioExclusionPattern>,
     #[doc = "The last time that this alert has been modified."]
     #[serde(rename = "lastModifiedUtc", default, with = "azure_core::date::rfc3339::option")]
@@ -4732,10 +4934,18 @@ pub struct FusionAlertRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl FusionAlertRuleProperties {
@@ -4790,7 +5000,12 @@ pub struct FusionAlertRuleTemplateProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The required data connectors for this template"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<AlertRuleTemplateDataSource>,
     #[doc = "The alert rule template status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4799,13 +5014,26 @@ pub struct FusionAlertRuleTemplateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule template"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "All supported source signal configurations consumed in fusion detection."]
-    #[serde(rename = "sourceSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_settings: Vec<FusionTemplateSourceSetting>,
 }
 impl FusionAlertRuleTemplateProperties {
@@ -4840,7 +5068,12 @@ pub struct FusionSourceSettings {
     #[serde(rename = "sourceName")]
     pub source_name: String,
     #[doc = "Configuration for all source subtypes under this source signal consumed in fusion detection."]
-    #[serde(rename = "sourceSubTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSubTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_sub_types: Vec<FusionSourceSubTypeSetting>,
 }
 impl FusionSourceSettings {
@@ -4884,7 +5117,11 @@ pub struct FusionSubTypeSeverityFilter {
     #[serde(rename = "isSupported", default, skip_serializing_if = "Option::is_none")]
     pub is_supported: Option<bool>,
     #[doc = "Individual Severity configuration settings for a given source subtype consumed in Fusion detection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<FusionSubTypeSeverityFiltersItem>,
 }
 impl FusionSubTypeSeverityFilter {
@@ -4912,7 +5149,12 @@ pub struct FusionTemplateSourceSetting {
     #[serde(rename = "sourceName")]
     pub source_name: String,
     #[doc = "All supported source subtypes under this source signal consumed in fusion detection."]
-    #[serde(rename = "sourceSubTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSubTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_sub_types: Vec<FusionTemplateSourceSubType>,
 }
 impl FusionTemplateSourceSetting {
@@ -4952,7 +5194,12 @@ pub struct FusionTemplateSubTypeSeverityFilter {
     #[serde(rename = "isSupported")]
     pub is_supported: bool,
     #[doc = "List of all supported severities for this source subtype consumed in Fusion detection."]
-    #[serde(rename = "severityFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "severityFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub severity_filters: Vec<AlertSeverityEnum>,
 }
 impl FusionTemplateSubTypeSeverityFilter {
@@ -5029,7 +5276,11 @@ pub struct GetInsightsResultsMetadata {
     #[serde(rename = "totalCount")]
     pub total_count: i32,
     #[doc = "information about the failed queries"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<GetInsightsErrorKind>,
 }
 impl GetInsightsResultsMetadata {
@@ -5044,7 +5295,11 @@ impl GetInsightsResultsMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GetQueriesResponse {
     #[doc = "The query result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityQueryItem>,
 }
 impl GetQueriesResponse {
@@ -5097,13 +5352,28 @@ pub struct GroupingConfiguration {
     #[serde(rename = "matchingMethod")]
     pub matching_method: grouping_configuration::MatchingMethod,
     #[doc = "A list of entity types to group by (when matchingMethod is Selected). Only entities defined in the current alert rule may be used."]
-    #[serde(rename = "groupByEntities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByEntities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_entities: Vec<EntityMappingType>,
     #[doc = "A list of alert details to group by (when matchingMethod is Selected)"]
-    #[serde(rename = "groupByAlertDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByAlertDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_alert_details: Vec<String>,
     #[doc = "A list of custom details keys to group by (when matchingMethod is Selected). Only keys defined in the current alert rule may be used."]
-    #[serde(rename = "groupByCustomDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByCustomDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_custom_details: Vec<String>,
 }
 impl GroupingConfiguration {
@@ -5198,7 +5468,11 @@ pub struct HuntingBookmarkProperties {
     #[serde(rename = "eventTime", default, with = "azure_core::date::rfc3339::option")]
     pub event_time: Option<time::OffsetDateTime>,
     #[doc = "List of labels relevant to this bookmark"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
     #[doc = "The notes of the bookmark"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5263,16 +5537,29 @@ pub struct IncidentAdditionalData {
     #[serde(rename = "commentsCount", default, skip_serializing_if = "Option::is_none")]
     pub comments_count: Option<i32>,
     #[doc = "List of product names of alerts in the incident"]
-    #[serde(rename = "alertProductNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alertProductNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alert_product_names: Vec<String>,
     #[doc = "The provider incident url to the incident in Microsoft 365 Defender portal"]
     #[serde(rename = "providerIncidentUrl", default, skip_serializing_if = "Option::is_none")]
     pub provider_incident_url: Option<String>,
     #[doc = "The tactics associated with incident"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques associated with incident's tactics'"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl IncidentAdditionalData {
@@ -5467,10 +5754,19 @@ impl IncidentConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IncidentEntitiesResponse {
     #[doc = "Array of the incident related entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entities: Vec<Entity>,
     #[doc = "The metadata from the incident related entities results."]
-    #[serde(rename = "metaData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metaData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meta_data: Vec<IncidentEntitiesResultsMetadata>,
 }
 impl IncidentEntitiesResponse {
@@ -5685,7 +5981,11 @@ pub struct IncidentProperties {
     #[serde(rename = "incidentNumber", default, skip_serializing_if = "Option::is_none")]
     pub incident_number: Option<i32>,
     #[doc = "List of labels relevant to this incident"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<IncidentLabel>,
     #[doc = "The name of the source provider that generated the incident"]
     #[serde(rename = "providerName", default, skip_serializing_if = "Option::is_none")]
@@ -5703,7 +6003,12 @@ pub struct IncidentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub owner: Option<IncidentOwnerInfo>,
     #[doc = "List of resource ids of Analytic rules related to the incident"]
-    #[serde(rename = "relatedAnalyticRuleIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "relatedAnalyticRuleIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub related_analytic_rule_ids: Vec<String>,
     #[doc = "The severity of the incident"]
     pub severity: IncidentSeverityEnum,
@@ -5762,7 +6067,11 @@ pub struct IncidentPropertiesAction {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub owner: Option<IncidentOwnerInfo>,
     #[doc = "List of labels to add to the incident."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<IncidentLabel>,
 }
 impl IncidentPropertiesAction {
@@ -5908,10 +6217,20 @@ pub mod insight_query_item_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct TableQuery {
         #[doc = "List of insight column definitions."]
-        #[serde(rename = "columnsDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "columnsDefinitions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub columns_definitions: Vec<serde_json::Value>,
         #[doc = "List of insight queries definitions."]
-        #[serde(rename = "queriesDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "queriesDefinitions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries_definitions: Vec<serde_json::Value>,
     }
     impl TableQuery {
@@ -5966,10 +6285,18 @@ pub mod insight_query_item_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InsightsTableResult {
     #[doc = "Columns Metadata of the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<serde_json::Value>,
     #[doc = "Rows data of the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rows: Vec<Vec<String>>,
 }
 impl InsightsTableResult {
@@ -5987,7 +6314,11 @@ pub struct InstructionSteps {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Instruction step details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instructions: Vec<serde_json::Value>,
 }
 impl InstructionSteps {
@@ -6249,10 +6580,18 @@ pub struct MlBehaviorAnalyticsAlertRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl MlBehaviorAnalyticsAlertRuleProperties {
@@ -6551,16 +6890,31 @@ impl MicrosoftSecurityIncidentCreationAlertRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct MicrosoftSecurityIncidentCreationAlertRuleCommonProperties {
     #[doc = "the alerts' displayNames on which the cases will be generated"]
-    #[serde(rename = "displayNamesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_filter: Vec<String>,
     #[doc = "the alerts' displayNames on which the cases will not be generated"]
-    #[serde(rename = "displayNamesExcludeFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesExcludeFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_exclude_filter: Vec<String>,
     #[doc = "The alerts' productName on which the cases will be generated"]
     #[serde(rename = "productFilter")]
     pub product_filter: MicrosoftSecurityProductName,
     #[doc = "the alerts' severities on which the cases will be generated"]
-    #[serde(rename = "severitiesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "severitiesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub severities_filter: Vec<AlertSeverityEnum>,
 }
 impl MicrosoftSecurityIncidentCreationAlertRuleCommonProperties {
@@ -6632,16 +6986,31 @@ pub struct MicrosoftSecurityIncidentCreationAlertRuleTemplateProperties {
     #[serde(flatten)]
     pub alert_rule_template_properties_base: AlertRuleTemplatePropertiesBase,
     #[doc = "the alerts' displayNames on which the cases will be generated"]
-    #[serde(rename = "displayNamesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_filter: Vec<String>,
     #[doc = "the alerts' displayNames on which the cases will not be generated"]
-    #[serde(rename = "displayNamesExcludeFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesExcludeFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_exclude_filter: Vec<String>,
     #[doc = "The alerts' productName on which the cases will be generated"]
     #[serde(rename = "productFilter", default, skip_serializing_if = "Option::is_none")]
     pub product_filter: Option<MicrosoftSecurityProductName>,
     #[doc = "the alerts' severities on which the cases will be generated"]
-    #[serde(rename = "severitiesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "severitiesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub severities_filter: Vec<AlertSeverityEnum>,
 }
 impl MicrosoftSecurityIncidentCreationAlertRuleTemplateProperties {
@@ -6766,10 +7135,18 @@ pub struct NrtAlertRuleProperties {
     #[doc = "The query that creates alerts for this rule."]
     pub query: String,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The display name for alerts created by this alert rule."]
     #[serde(rename = "displayName")]
@@ -7286,10 +7663,19 @@ impl OperationsList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permissions {
     #[doc = "Resource provider permissions required for the connector"]
-    #[serde(rename = "resourceProvider", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceProvider",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_provider: Vec<serde_json::Value>,
     #[doc = "Customs permissions required for the connector"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customs: Vec<serde_json::Value>,
 }
 impl Permissions {
@@ -7456,7 +7842,11 @@ pub struct Repo {
     #[serde(rename = "fullName", default, skip_serializing_if = "Option::is_none")]
     pub full_name: Option<String>,
     #[doc = "Array of branches."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub branches: Vec<String>,
 }
 impl Repo {
@@ -7537,7 +7927,12 @@ pub struct Repository {
     #[serde(rename = "deploymentLogsUrl", default, skip_serializing_if = "Option::is_none")]
     pub deployment_logs_url: Option<String>,
     #[doc = "Dictionary of source control content type and path mapping."]
-    #[serde(rename = "pathMapping", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pathMapping",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path_mapping: Vec<ContentPathMap>,
 }
 impl Repository {
@@ -7848,10 +8243,18 @@ pub struct ScheduledAlertRuleProperties {
     #[serde(rename = "suppressionEnabled")]
     pub suppression_enabled: bool,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "Incident Configuration property bag."]
     #[serde(rename = "incidentConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -7911,7 +8314,12 @@ pub struct ScheduledAlertRuleTemplateProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The required data connectors for this template"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<AlertRuleTemplateDataSource>,
     #[doc = "The alert rule template status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7935,10 +8343,18 @@ pub struct ScheduledAlertRuleTemplateProperties {
     #[serde(rename = "triggerThreshold", default, skip_serializing_if = "Option::is_none")]
     pub trigger_threshold: Option<i32>,
     #[doc = "The tactics of the alert rule template"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The version of this template - in format <a.b.c>, where all are numbers. For example <1.0.2>."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7993,7 +8409,12 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "confidenceLevel", default, skip_serializing_if = "Option::is_none")]
     pub confidence_level: Option<security_alert_properties::ConfidenceLevel>,
     #[doc = "The confidence reasons"]
-    #[serde(rename = "confidenceReasons", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "confidenceReasons",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub confidence_reasons: Vec<serde_json::Value>,
     #[doc = "The confidence score of the alert."]
     #[serde(rename = "confidenceScore", default, skip_serializing_if = "Option::is_none")]
@@ -8026,7 +8447,12 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "productVersion", default, skip_serializing_if = "Option::is_none")]
     pub product_version: Option<String>,
     #[doc = "Manual action items to take to remediate the alert."]
-    #[serde(rename = "remediationSteps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "remediationSteps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub remediation_steps: Vec<String>,
     #[doc = "The severity of the alert"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8041,7 +8467,11 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "systemAlertId", default, skip_serializing_if = "Option::is_none")]
     pub system_alert_id: Option<String>,
     #[doc = "The tactics of the alert"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The time the alert was generated."]
     #[serde(rename = "timeGenerated", default, with = "azure_core::date::rfc3339::option")]
@@ -8053,7 +8483,12 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "alertLink", default, skip_serializing_if = "Option::is_none")]
     pub alert_link: Option<String>,
     #[doc = "The list of resource identifiers of the alert."]
-    #[serde(rename = "resourceIdentifiers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceIdentifiers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_identifiers: Vec<serde_json::Value>,
 }
 impl SecurityAlertProperties {
@@ -8328,7 +8763,12 @@ pub struct SecurityMlAnalyticsSettingsDataSource {
     #[serde(rename = "connectorId", default, skip_serializing_if = "Option::is_none")]
     pub connector_id: Option<String>,
     #[doc = "The data types used by the security ml analytics settings"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<String>,
 }
 impl SecurityMlAnalyticsSettingsDataSource {
@@ -8689,10 +9129,20 @@ pub struct TeamProperties {
     #[serde(rename = "teamDescription", default, skip_serializing_if = "Option::is_none")]
     pub team_description: Option<String>,
     #[doc = "List of member IDs to add to the team"]
-    #[serde(rename = "memberIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "memberIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub member_ids: Vec<String>,
     #[doc = "List of group IDs to add their members to the team"]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
 }
 impl TeamProperties {
@@ -8743,10 +9193,18 @@ pub struct ThreatIntelligenceAlertRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl ThreatIntelligenceAlertRuleProperties {
@@ -8803,7 +9261,12 @@ pub mod threat_intelligence_alert_rule_template {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ThreatIntelligenceAppendTags {
     #[doc = "List of tags to be appended."]
-    #[serde(rename = "threatIntelligenceTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatIntelligenceTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_intelligence_tags: Vec<String>,
 }
 impl ThreatIntelligenceAppendTags {
@@ -8857,22 +9320,49 @@ pub struct ThreatIntelligenceFilteringCriteria {
     #[serde(rename = "includeDisabled", default, skip_serializing_if = "Option::is_none")]
     pub include_disabled: Option<bool>,
     #[doc = "Columns to sort by and sorting order"]
-    #[serde(rename = "sortBy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sortBy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sort_by: Vec<ThreatIntelligenceSortingCriteria>,
     #[doc = "Sources of threat intelligence indicators"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sources: Vec<String>,
     #[doc = "Pattern types"]
-    #[serde(rename = "patternTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern_types: Vec<String>,
     #[doc = "Threat types of threat intelligence indicators"]
-    #[serde(rename = "threatTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_types: Vec<String>,
     #[doc = "Ids of threat intelligence indicators"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ids: Vec<String>,
     #[doc = "Keywords for searching threat intelligence indicators"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keywords: Vec<String>,
     #[doc = "Skip token."]
     #[serde(rename = "skipToken", default, skip_serializing_if = "Option::is_none")]
@@ -8893,7 +9383,11 @@ pub struct ThreatIntelligenceGranularMarkingModel {
     #[serde(rename = "markingRef", default, skip_serializing_if = "Option::is_none")]
     pub marking_ref: Option<i32>,
     #[doc = "granular marking model selectors"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selectors: Vec<String>,
 }
 impl ThreatIntelligenceGranularMarkingModel {
@@ -8924,7 +9418,12 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(flatten)]
     pub entity_common_properties: EntityCommonProperties,
     #[doc = "List of tags"]
-    #[serde(rename = "threatIntelligenceTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatIntelligenceTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_intelligence_tags: Vec<String>,
     #[doc = "Last updated time in UTC"]
     #[serde(rename = "lastUpdatedTimeUtc", default, skip_serializing_if = "Option::is_none")]
@@ -8939,7 +9438,12 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Indicator types of threat intelligence entities"]
-    #[serde(rename = "indicatorTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "indicatorTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub indicator_types: Vec<String>,
     #[doc = "Pattern of a threat intelligence entity"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8951,10 +9455,20 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(rename = "patternVersion", default, skip_serializing_if = "Option::is_none")]
     pub pattern_version: Option<String>,
     #[doc = "Kill chain phases"]
-    #[serde(rename = "killChainPhases", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "killChainPhases",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kill_chain_phases: Vec<ThreatIntelligenceKillChainPhase>,
     #[doc = "Parsed patterns"]
-    #[serde(rename = "parsedPattern", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parsedPattern",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parsed_pattern: Vec<ThreatIntelligenceParsedPattern>,
     #[doc = "External ID of threat intelligence entity"]
     #[serde(rename = "externalId", default, skip_serializing_if = "Option::is_none")]
@@ -8969,13 +9483,27 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(rename = "externalLastUpdatedTimeUtc", default, skip_serializing_if = "Option::is_none")]
     pub external_last_updated_time_utc: Option<String>,
     #[doc = "External References"]
-    #[serde(rename = "externalReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_references: Vec<ThreatIntelligenceExternalReference>,
     #[doc = "Granular Markings"]
-    #[serde(rename = "granularMarkings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "granularMarkings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub granular_markings: Vec<ThreatIntelligenceGranularMarkingModel>,
     #[doc = "Labels  of threat intelligence entity"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "Is threat intelligence entity revoked"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8984,13 +9512,23 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub confidence: Option<i32>,
     #[doc = "Threat intelligence entity object marking references"]
-    #[serde(rename = "objectMarkingRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "objectMarkingRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub object_marking_refs: Vec<String>,
     #[doc = "Language of threat intelligence entity"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub language: Option<String>,
     #[doc = "Threat types"]
-    #[serde(rename = "threatTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_types: Vec<String>,
     #[doc = "Valid from"]
     #[serde(rename = "validFrom", default, skip_serializing_if = "Option::is_none")]
@@ -9071,13 +9609,28 @@ pub struct ThreatIntelligenceMetric {
     #[serde(rename = "lastUpdatedTimeUtc", default, skip_serializing_if = "Option::is_none")]
     pub last_updated_time_utc: Option<String>,
     #[doc = "Threat type metrics"]
-    #[serde(rename = "threatTypeMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatTypeMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_type_metrics: Vec<ThreatIntelligenceMetricEntity>,
     #[doc = "Pattern type metrics"]
-    #[serde(rename = "patternTypeMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternTypeMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern_type_metrics: Vec<ThreatIntelligenceMetricEntity>,
     #[doc = "Source metrics"]
-    #[serde(rename = "sourceMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_metrics: Vec<ThreatIntelligenceMetricEntity>,
 }
 impl ThreatIntelligenceMetric {
@@ -9130,7 +9683,12 @@ pub struct ThreatIntelligenceParsedPattern {
     #[serde(rename = "patternTypeKey", default, skip_serializing_if = "Option::is_none")]
     pub pattern_type_key: Option<String>,
     #[doc = "Pattern type keys"]
-    #[serde(rename = "patternTypeValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternTypeValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern_type_values: Vec<ThreatIntelligenceParsedPatternTypeValue>,
 }
 impl ThreatIntelligenceParsedPattern {
@@ -9441,7 +9999,11 @@ pub struct TimelineResultsMetadata {
     #[doc = "timeline aggregation per kind"]
     pub aggregations: Vec<TimelineAggregation>,
     #[doc = "information about the failure queries"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<TimelineError>,
 }
 impl TimelineResultsMetadata {
@@ -9515,7 +10077,12 @@ impl Serialize for UebaDataSources {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UebaProperties {
     #[doc = "The relevant data sources that enriched by ueba"]
-    #[serde(rename = "dataSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_sources: Vec<UebaDataSources>,
 }
 impl UebaProperties {
@@ -9738,7 +10305,11 @@ pub struct WatchlistProperties {
     #[serde(rename = "isDeleted", default, skip_serializing_if = "Option::is_none")]
     pub is_deleted: Option<bool>,
     #[doc = "List of labels relevant to this watchlist"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
     #[doc = "The default duration of a watchlist (in ISO 8601 duration format)"]
     #[serde(rename = "defaultDuration", default, skip_serializing_if = "Option::is_none")]
@@ -9876,10 +10447,18 @@ impl MetadataAuthor {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetadataCategories {
     #[doc = "domain for the solution content item"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domains: Vec<String>,
     #[doc = "Industry verticals for the solution content item"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub verticals: Vec<String>,
 }
 impl MetadataCategories {
@@ -9909,7 +10488,11 @@ pub struct MetadataDependencies {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<metadata_dependencies::Operator>,
     #[doc = "This is the list of dependencies we must fulfill, according to the AND/OR operator"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub criteria: Vec<MetadataDependencies>,
 }
 impl MetadataDependencies {
diff --git a/services/mgmt/securityinsights/src/package_preview_2022_08/models.rs b/services/mgmt/securityinsights/src/package_preview_2022_08/models.rs
index 6d536e6684..fdc9520925 100644
--- a/services/mgmt/securityinsights/src/package_preview_2022_08/models.rs
+++ b/services/mgmt/securityinsights/src/package_preview_2022_08/models.rs
@@ -352,7 +352,12 @@ pub struct ActivityEntityQueriesProperties {
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "List of the fields of the source entity that are required to run the query"]
-    #[serde(rename = "requiredInputFieldsSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredInputFieldsSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_input_fields_sets: Vec<Vec<String>>,
     #[doc = "The query applied only to entities matching to all filters"]
     #[serde(rename = "entitiesFilter", default, skip_serializing_if = "Option::is_none")]
@@ -440,13 +445,23 @@ pub struct ActivityEntityQueryTemplateProperties {
     #[serde(rename = "queryDefinitions", default, skip_serializing_if = "Option::is_none")]
     pub query_definitions: Option<activity_entity_query_template_properties::QueryDefinitions>,
     #[doc = "List of required data types for the given entity query template"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<DataTypeDefinitions>,
     #[doc = "The type of the entity"]
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "List of the fields of the source entity that are required to run the query"]
-    #[serde(rename = "requiredInputFieldsSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredInputFieldsSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_input_fields_sets: Vec<Vec<String>>,
     #[doc = "The query applied only to entities matching to all filters"]
     #[serde(rename = "entitiesFilter", default, skip_serializing_if = "Option::is_none")]
@@ -632,7 +647,12 @@ pub struct AlertRuleTemplateDataSource {
     #[serde(rename = "connectorId", default, skip_serializing_if = "Option::is_none")]
     pub connector_id: Option<String>,
     #[doc = "The data types used by the alert rule template"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<String>,
 }
 impl AlertRuleTemplateDataSource {
@@ -659,7 +679,12 @@ pub struct AlertRuleTemplatePropertiesBase {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The required data sources for this template"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<AlertRuleTemplateDataSource>,
     #[doc = "The alert rule template status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -715,10 +740,18 @@ pub struct AlertRuleTemplateWithMitreProperties {
     #[serde(flatten)]
     pub alert_rule_template_properties_base: AlertRuleTemplatePropertiesBase,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl AlertRuleTemplateWithMitreProperties {
@@ -887,13 +920,26 @@ pub struct AnomalySecurityMlAnalyticsSettingsProperties {
     #[serde(rename = "lastModifiedUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_modified_utc: Option<time::OffsetDateTime>,
     #[doc = "The required data sources for this SecurityMLAnalyticsSettings"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<SecurityMlAnalyticsSettingsDataSource>,
     #[doc = "The tactics of the SecurityMLAnalyticsSettings"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the SecurityMLAnalyticsSettings"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The anomaly version of the AnomalySecurityMLAnalyticsSettings."]
     #[serde(rename = "anomalyVersion")]
@@ -1013,10 +1059,18 @@ pub struct AnomalyTimelineItem {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub intent: Option<String>,
     #[doc = "The techniques of the anomaly."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The reasons that cause the anomaly."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons: Vec<String>,
 }
 impl AnomalyTimelineItem {
@@ -1728,7 +1782,12 @@ pub struct AutomationRulePropertyValuesChangedCondition {
     pub change_type: Option<AutomationRulePropertyChangedConditionSupportedChangedType>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<AutomationRulePropertyConditionSupportedOperator>,
-    #[serde(rename = "propertyValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_values: Vec<String>,
 }
 impl AutomationRulePropertyValuesChangedCondition {
@@ -1743,7 +1802,12 @@ pub struct AutomationRulePropertyValuesCondition {
     pub property_name: Option<AutomationRulePropertyConditionSupportedProperty>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<AutomationRulePropertyConditionSupportedOperator>,
-    #[serde(rename = "propertyValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_values: Vec<String>,
 }
 impl AutomationRulePropertyValuesCondition {
@@ -1781,7 +1845,11 @@ pub struct AutomationRuleTriggeringLogic {
     #[serde(rename = "triggersWhen")]
     pub triggers_when: TriggersWhen,
     #[doc = "The conditions to evaluate to determine if the automation rule should be triggered on a given object."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<AutomationRuleCondition>,
 }
 impl AutomationRuleTriggeringLogic {
@@ -1797,7 +1865,11 @@ impl AutomationRuleTriggeringLogic {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AutomationRulesList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AutomationRule>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -1996,7 +2068,12 @@ pub struct BookmarkEntityMappings {
     #[serde(rename = "entityType", default, skip_serializing_if = "Option::is_none")]
     pub entity_type: Option<String>,
     #[doc = "Array of fields mapping for that entity type"]
-    #[serde(rename = "fieldMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_mappings: Vec<EntityFieldMapping>,
 }
 impl BookmarkEntityMappings {
@@ -2043,10 +2120,18 @@ pub mod bookmark_expand_response {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Value {
         #[doc = "Array of the expansion result entities."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub entities: Vec<Entity>,
         #[doc = "Array of expansion result connected entities"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub edges: Vec<ConnectedEntity>,
     }
     impl Value {
@@ -2088,7 +2173,11 @@ pub struct BookmarkProperties {
     #[serde(rename = "displayName")]
     pub display_name: String,
     #[doc = "List of labels relevant to this bookmark"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
     #[doc = "The notes of the bookmark"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2120,10 +2209,18 @@ pub struct BookmarkProperties {
     #[serde(rename = "entityMappings", default, skip_serializing_if = "Option::is_none")]
     pub entity_mappings: Option<EntityMappingsList>,
     #[doc = "A list of relevant mitre attacks"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "A list of relevant mitre techniques"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<AttackTechnique>,
 }
 impl BookmarkProperties {
@@ -2175,7 +2272,11 @@ pub struct BookmarkTimelineItem {
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
     pub created_by: Option<UserInfo>,
     #[doc = "List of labels relevant to this bookmark"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
 }
 impl BookmarkTimelineItem {
@@ -2643,7 +2744,11 @@ pub struct ConnectivityCriteria {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<connectivity_criteria::Type>,
     #[doc = "Queries for checking connectivity"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl ConnectivityCriteria {
@@ -2962,7 +3067,12 @@ pub struct DataConnectorConnectBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub password: Option<String>,
     #[doc = ""]
-    #[serde(rename = "requestConfigUserInputValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestConfigUserInputValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_config_user_input_values: Vec<serde_json::Value>,
 }
 impl DataConnectorConnectBody {
@@ -3547,7 +3657,11 @@ pub struct EnrichmentDomainWhoisContact {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub org: Option<String>,
     #[doc = "A list describing the street address for this contact"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub street: Vec<String>,
     #[doc = "The city for this contact"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3607,10 +3721,19 @@ pub struct EnrichmentDomainWhoisDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub contacts: Option<EnrichmentDomainWhoisContacts>,
     #[doc = "A list of name servers associated with this domain"]
-    #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nameServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name_servers: Vec<String>,
     #[doc = "The set of status flags for this whois record"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<String>,
 }
 impl EnrichmentDomainWhoisDetails {
@@ -3742,7 +3865,12 @@ impl EntityAnalytics {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EntityAnalyticsProperties {
     #[doc = "The relevant entity providers that are synced"]
-    #[serde(rename = "entityProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "entityProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entity_providers: Vec<EntityProviders>,
 }
 impl EntityAnalyticsProperties {
@@ -3819,10 +3947,18 @@ pub mod entity_expand_response {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Value {
         #[doc = "Array of the expansion result entities."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub entities: Vec<Entity>,
         #[doc = "Array of edges that connects the entity to the list of entities."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub edges: Vec<EntityEdges>,
     }
     impl Value {
@@ -3859,7 +3995,12 @@ pub struct EntityGetInsightsParameters {
     #[serde(rename = "addDefaultExtendedTimeRange", default, skip_serializing_if = "Option::is_none")]
     pub add_default_extended_time_range: Option<bool>,
     #[doc = "List of Insights Query Id. If empty, default value is all insights of this entity"]
-    #[serde(rename = "insightQueryIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "insightQueryIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub insight_query_ids: Vec<String>,
 }
 impl EntityGetInsightsParameters {
@@ -3879,7 +4020,11 @@ pub struct EntityGetInsightsResponse {
     #[serde(rename = "metaData", default, skip_serializing_if = "Option::is_none")]
     pub meta_data: Option<GetInsightsResultsMetadata>,
     #[doc = "The insights result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityInsightItem>,
 }
 impl EntityGetInsightsResponse {
@@ -4057,7 +4202,12 @@ pub struct EntityInsightItem {
     #[serde(rename = "tableQueryResults", default, skip_serializing_if = "Option::is_none")]
     pub table_query_results: Option<InsightsTableResult>,
     #[doc = "Query results for table insights query."]
-    #[serde(rename = "chartQueryResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "chartQueryResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub chart_query_results: Vec<InsightsTableResult>,
 }
 impl EntityInsightItem {
@@ -4110,7 +4260,12 @@ pub struct EntityMapping {
     #[serde(rename = "entityType", default, skip_serializing_if = "Option::is_none")]
     pub entity_type: Option<EntityMappingType>,
     #[doc = "array of field mappings for the given entity mapping"]
-    #[serde(rename = "fieldMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_mappings: Vec<FieldMapping>,
 }
 impl EntityMapping {
@@ -4274,13 +4429,23 @@ impl EntityQueryItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EntityQueryItemProperties {
     #[doc = "Data types for template"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<serde_json::Value>,
     #[doc = "The type of the entity"]
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "Data types for template"]
-    #[serde(rename = "requiredInputFieldsSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredInputFieldsSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_input_fields_sets: Vec<Vec<String>>,
     #[doc = "The query applied only to entities matching to all filters"]
     #[serde(rename = "entitiesFilter", default, skip_serializing_if = "Option::is_none")]
@@ -4477,7 +4642,11 @@ impl Serialize for EntityTimelineKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct EntityTimelineParameters {
     #[doc = "Array of timeline Item kinds."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kinds: Vec<EntityTimelineKind>,
     #[doc = "The start timeline date, so the results returned are after this date."]
     #[serde(rename = "startTime", with = "azure_core::date::rfc3339")]
@@ -4506,7 +4675,11 @@ pub struct EntityTimelineResponse {
     #[serde(rename = "metaData", default, skip_serializing_if = "Option::is_none")]
     pub meta_data: Option<TimelineResultsMetadata>,
     #[doc = "The timeline result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityTimelineItem>,
 }
 impl EntityTimelineResponse {
@@ -4567,7 +4740,12 @@ impl EventGroupingSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpansionEntityQueriesProperties {
     #[doc = "List of the data sources that are required to run the query"]
-    #[serde(rename = "dataSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_sources: Vec<String>,
     #[doc = "The query display name"]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
@@ -4576,10 +4754,20 @@ pub struct ExpansionEntityQueriesProperties {
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "List of the fields of the source entity that are required to run the query"]
-    #[serde(rename = "inputFields", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputFields",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_fields: Vec<String>,
     #[doc = "List of the desired output types to be constructed from the result"]
-    #[serde(rename = "outputEntityTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputEntityTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_entity_types: Vec<EntityInnerType>,
     #[doc = "The template query string to be parsed and formatted"]
     #[serde(rename = "queryTemplate", default, skip_serializing_if = "Option::is_none")]
@@ -4636,7 +4824,11 @@ impl ExpansionResultAggregation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpansionResultsMetadata {
     #[doc = "Information of the aggregated nodes in the expansion result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aggregations: Vec<ExpansionResultAggregation>,
 }
 impl ExpansionResultsMetadata {
@@ -4738,7 +4930,12 @@ pub struct FileImportProperties {
     #[serde(rename = "errorFile", default, skip_serializing_if = "Option::is_none")]
     pub error_file: Option<FileMetadata>,
     #[doc = "An ordered list of some of the errors that were encountered during validation."]
-    #[serde(rename = "errorsPreview", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorsPreview",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors_preview: Vec<ValidationError>,
     #[doc = "Represents a file."]
     #[serde(rename = "importFile")]
@@ -5055,10 +5252,20 @@ pub struct FusionAlertRuleProperties {
     #[doc = "Determines whether this alert rule is enabled or disabled."]
     pub enabled: bool,
     #[doc = "Configuration for all supported source signals in fusion detection."]
-    #[serde(rename = "sourceSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_settings: Vec<FusionSourceSettings>,
     #[doc = "Configuration to exclude scenarios in fusion detection."]
-    #[serde(rename = "scenarioExclusionPatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scenarioExclusionPatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scenario_exclusion_patterns: Vec<FusionScenarioExclusionPattern>,
     #[doc = "The last time that this alert has been modified."]
     #[serde(rename = "lastModifiedUtc", default, with = "azure_core::date::rfc3339::option")]
@@ -5067,10 +5274,18 @@ pub struct FusionAlertRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl FusionAlertRuleProperties {
@@ -5125,7 +5340,12 @@ pub struct FusionAlertRuleTemplateProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The required data connectors for this template"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<AlertRuleTemplateDataSource>,
     #[doc = "The alert rule template status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5134,13 +5354,26 @@ pub struct FusionAlertRuleTemplateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule template"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "All supported source signal configurations consumed in fusion detection."]
-    #[serde(rename = "sourceSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_settings: Vec<FusionTemplateSourceSetting>,
 }
 impl FusionAlertRuleTemplateProperties {
@@ -5175,7 +5408,12 @@ pub struct FusionSourceSettings {
     #[serde(rename = "sourceName")]
     pub source_name: String,
     #[doc = "Configuration for all source subtypes under this source signal consumed in fusion detection."]
-    #[serde(rename = "sourceSubTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSubTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_sub_types: Vec<FusionSourceSubTypeSetting>,
 }
 impl FusionSourceSettings {
@@ -5219,7 +5457,11 @@ pub struct FusionSubTypeSeverityFilter {
     #[serde(rename = "isSupported", default, skip_serializing_if = "Option::is_none")]
     pub is_supported: Option<bool>,
     #[doc = "Individual Severity configuration settings for a given source subtype consumed in Fusion detection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<FusionSubTypeSeverityFiltersItem>,
 }
 impl FusionSubTypeSeverityFilter {
@@ -5247,7 +5489,12 @@ pub struct FusionTemplateSourceSetting {
     #[serde(rename = "sourceName")]
     pub source_name: String,
     #[doc = "All supported source subtypes under this source signal consumed in fusion detection."]
-    #[serde(rename = "sourceSubTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSubTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_sub_types: Vec<FusionTemplateSourceSubType>,
 }
 impl FusionTemplateSourceSetting {
@@ -5287,7 +5534,12 @@ pub struct FusionTemplateSubTypeSeverityFilter {
     #[serde(rename = "isSupported")]
     pub is_supported: bool,
     #[doc = "List of all supported severities for this source subtype consumed in Fusion detection."]
-    #[serde(rename = "severityFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "severityFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub severity_filters: Vec<AlertSeverityEnum>,
 }
 impl FusionTemplateSubTypeSeverityFilter {
@@ -5364,7 +5616,11 @@ pub struct GetInsightsResultsMetadata {
     #[serde(rename = "totalCount")]
     pub total_count: i32,
     #[doc = "information about the failed queries"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<GetInsightsErrorKind>,
 }
 impl GetInsightsResultsMetadata {
@@ -5379,7 +5635,11 @@ impl GetInsightsResultsMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GetQueriesResponse {
     #[doc = "The query result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityQueryItem>,
 }
 impl GetQueriesResponse {
@@ -5432,13 +5692,28 @@ pub struct GroupingConfiguration {
     #[serde(rename = "matchingMethod")]
     pub matching_method: grouping_configuration::MatchingMethod,
     #[doc = "A list of entity types to group by (when matchingMethod is Selected). Only entities defined in the current alert rule may be used."]
-    #[serde(rename = "groupByEntities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByEntities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_entities: Vec<EntityMappingType>,
     #[doc = "A list of alert details to group by (when matchingMethod is Selected)"]
-    #[serde(rename = "groupByAlertDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByAlertDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_alert_details: Vec<String>,
     #[doc = "A list of custom details keys to group by (when matchingMethod is Selected). Only keys defined in the current alert rule may be used."]
-    #[serde(rename = "groupByCustomDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByCustomDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_custom_details: Vec<String>,
 }
 impl GroupingConfiguration {
@@ -5533,7 +5808,11 @@ pub struct HuntingBookmarkProperties {
     #[serde(rename = "eventTime", default, with = "azure_core::date::rfc3339::option")]
     pub event_time: Option<time::OffsetDateTime>,
     #[doc = "List of labels relevant to this bookmark"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
     #[doc = "The notes of the bookmark"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5598,16 +5877,29 @@ pub struct IncidentAdditionalData {
     #[serde(rename = "commentsCount", default, skip_serializing_if = "Option::is_none")]
     pub comments_count: Option<i32>,
     #[doc = "List of product names of alerts in the incident"]
-    #[serde(rename = "alertProductNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alertProductNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alert_product_names: Vec<String>,
     #[doc = "The provider incident url to the incident in Microsoft 365 Defender portal"]
     #[serde(rename = "providerIncidentUrl", default, skip_serializing_if = "Option::is_none")]
     pub provider_incident_url: Option<String>,
     #[doc = "The tactics associated with incident"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques associated with incident's tactics'"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl IncidentAdditionalData {
@@ -5802,10 +6094,19 @@ impl IncidentConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IncidentEntitiesResponse {
     #[doc = "Array of the incident related entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entities: Vec<Entity>,
     #[doc = "The metadata from the incident related entities results."]
-    #[serde(rename = "metaData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metaData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meta_data: Vec<IncidentEntitiesResultsMetadata>,
 }
 impl IncidentEntitiesResponse {
@@ -6020,7 +6321,11 @@ pub struct IncidentProperties {
     #[serde(rename = "incidentNumber", default, skip_serializing_if = "Option::is_none")]
     pub incident_number: Option<i32>,
     #[doc = "List of labels relevant to this incident"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<IncidentLabel>,
     #[doc = "The name of the source provider that generated the incident"]
     #[serde(rename = "providerName", default, skip_serializing_if = "Option::is_none")]
@@ -6038,7 +6343,12 @@ pub struct IncidentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub owner: Option<IncidentOwnerInfo>,
     #[doc = "List of resource ids of Analytic rules related to the incident"]
-    #[serde(rename = "relatedAnalyticRuleIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "relatedAnalyticRuleIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub related_analytic_rule_ids: Vec<String>,
     #[doc = "The severity of the incident"]
     pub severity: IncidentSeverityEnum,
@@ -6097,7 +6407,11 @@ pub struct IncidentPropertiesAction {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub owner: Option<IncidentOwnerInfo>,
     #[doc = "List of labels to add to the incident."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<IncidentLabel>,
 }
 impl IncidentPropertiesAction {
@@ -6243,10 +6557,20 @@ pub mod insight_query_item_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct TableQuery {
         #[doc = "List of insight column definitions."]
-        #[serde(rename = "columnsDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "columnsDefinitions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub columns_definitions: Vec<serde_json::Value>,
         #[doc = "List of insight queries definitions."]
-        #[serde(rename = "queriesDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "queriesDefinitions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries_definitions: Vec<serde_json::Value>,
     }
     impl TableQuery {
@@ -6301,10 +6625,18 @@ pub mod insight_query_item_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InsightsTableResult {
     #[doc = "Columns Metadata of the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<serde_json::Value>,
     #[doc = "Rows data of the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rows: Vec<Vec<String>>,
 }
 impl InsightsTableResult {
@@ -6322,7 +6654,11 @@ pub struct InstructionSteps {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Instruction step details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instructions: Vec<serde_json::Value>,
 }
 impl InstructionSteps {
@@ -6584,10 +6920,18 @@ pub struct MlBehaviorAnalyticsAlertRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl MlBehaviorAnalyticsAlertRuleProperties {
@@ -6883,16 +7227,31 @@ impl MicrosoftSecurityIncidentCreationAlertRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct MicrosoftSecurityIncidentCreationAlertRuleCommonProperties {
     #[doc = "the alerts' displayNames on which the cases will be generated"]
-    #[serde(rename = "displayNamesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_filter: Vec<String>,
     #[doc = "the alerts' displayNames on which the cases will not be generated"]
-    #[serde(rename = "displayNamesExcludeFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesExcludeFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_exclude_filter: Vec<String>,
     #[doc = "The alerts' productName on which the cases will be generated"]
     #[serde(rename = "productFilter")]
     pub product_filter: MicrosoftSecurityProductName,
     #[doc = "the alerts' severities on which the cases will be generated"]
-    #[serde(rename = "severitiesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "severitiesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub severities_filter: Vec<AlertSeverityEnum>,
 }
 impl MicrosoftSecurityIncidentCreationAlertRuleCommonProperties {
@@ -6964,16 +7323,31 @@ pub struct MicrosoftSecurityIncidentCreationAlertRuleTemplateProperties {
     #[serde(flatten)]
     pub alert_rule_template_properties_base: AlertRuleTemplatePropertiesBase,
     #[doc = "the alerts' displayNames on which the cases will be generated"]
-    #[serde(rename = "displayNamesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_filter: Vec<String>,
     #[doc = "the alerts' displayNames on which the cases will not be generated"]
-    #[serde(rename = "displayNamesExcludeFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesExcludeFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_exclude_filter: Vec<String>,
     #[doc = "The alerts' productName on which the cases will be generated"]
     #[serde(rename = "productFilter", default, skip_serializing_if = "Option::is_none")]
     pub product_filter: Option<MicrosoftSecurityProductName>,
     #[doc = "the alerts' severities on which the cases will be generated"]
-    #[serde(rename = "severitiesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "severitiesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub severities_filter: Vec<AlertSeverityEnum>,
 }
 impl MicrosoftSecurityIncidentCreationAlertRuleTemplateProperties {
@@ -7098,10 +7472,18 @@ pub struct NrtAlertRuleProperties {
     #[doc = "The query that creates alerts for this rule."]
     pub query: String,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The display name for alerts created by this alert rule."]
     #[serde(rename = "displayName")]
@@ -7618,10 +8000,19 @@ impl OperationsList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permissions {
     #[doc = "Resource provider permissions required for the connector"]
-    #[serde(rename = "resourceProvider", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceProvider",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_provider: Vec<serde_json::Value>,
     #[doc = "Customs permissions required for the connector"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customs: Vec<serde_json::Value>,
 }
 impl Permissions {
@@ -7788,7 +8179,11 @@ pub struct Repo {
     #[serde(rename = "fullName", default, skip_serializing_if = "Option::is_none")]
     pub full_name: Option<String>,
     #[doc = "Array of branches."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub branches: Vec<String>,
 }
 impl Repo {
@@ -7869,7 +8264,12 @@ pub struct Repository {
     #[serde(rename = "deploymentLogsUrl", default, skip_serializing_if = "Option::is_none")]
     pub deployment_logs_url: Option<String>,
     #[doc = "Dictionary of source control content type and path mapping."]
-    #[serde(rename = "pathMapping", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pathMapping",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path_mapping: Vec<ContentPathMap>,
 }
 impl Repository {
@@ -8180,10 +8580,18 @@ pub struct ScheduledAlertRuleProperties {
     #[serde(rename = "suppressionEnabled")]
     pub suppression_enabled: bool,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "Incident Configuration property bag."]
     #[serde(rename = "incidentConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -8243,7 +8651,12 @@ pub struct ScheduledAlertRuleTemplateProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The required data connectors for this template"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<AlertRuleTemplateDataSource>,
     #[doc = "The alert rule template status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8267,10 +8680,18 @@ pub struct ScheduledAlertRuleTemplateProperties {
     #[serde(rename = "triggerThreshold", default, skip_serializing_if = "Option::is_none")]
     pub trigger_threshold: Option<i32>,
     #[doc = "The tactics of the alert rule template"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The version of this template - in format <a.b.c>, where all are numbers. For example <1.0.2>."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8325,7 +8746,12 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "confidenceLevel", default, skip_serializing_if = "Option::is_none")]
     pub confidence_level: Option<security_alert_properties::ConfidenceLevel>,
     #[doc = "The confidence reasons"]
-    #[serde(rename = "confidenceReasons", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "confidenceReasons",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub confidence_reasons: Vec<serde_json::Value>,
     #[doc = "The confidence score of the alert."]
     #[serde(rename = "confidenceScore", default, skip_serializing_if = "Option::is_none")]
@@ -8358,7 +8784,12 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "productVersion", default, skip_serializing_if = "Option::is_none")]
     pub product_version: Option<String>,
     #[doc = "Manual action items to take to remediate the alert."]
-    #[serde(rename = "remediationSteps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "remediationSteps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub remediation_steps: Vec<String>,
     #[doc = "The severity of the alert"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8373,7 +8804,11 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "systemAlertId", default, skip_serializing_if = "Option::is_none")]
     pub system_alert_id: Option<String>,
     #[doc = "The tactics of the alert"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The time the alert was generated."]
     #[serde(rename = "timeGenerated", default, with = "azure_core::date::rfc3339::option")]
@@ -8385,7 +8820,12 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "alertLink", default, skip_serializing_if = "Option::is_none")]
     pub alert_link: Option<String>,
     #[doc = "The list of resource identifiers of the alert."]
-    #[serde(rename = "resourceIdentifiers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceIdentifiers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_identifiers: Vec<serde_json::Value>,
 }
 impl SecurityAlertProperties {
@@ -8660,7 +9100,12 @@ pub struct SecurityMlAnalyticsSettingsDataSource {
     #[serde(rename = "connectorId", default, skip_serializing_if = "Option::is_none")]
     pub connector_id: Option<String>,
     #[doc = "The data types used by the security ml analytics settings"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<String>,
 }
 impl SecurityMlAnalyticsSettingsDataSource {
@@ -9021,10 +9466,20 @@ pub struct TeamProperties {
     #[serde(rename = "teamDescription", default, skip_serializing_if = "Option::is_none")]
     pub team_description: Option<String>,
     #[doc = "List of member IDs to add to the team"]
-    #[serde(rename = "memberIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "memberIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub member_ids: Vec<String>,
     #[doc = "List of group IDs to add their members to the team"]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
 }
 impl TeamProperties {
@@ -9075,10 +9530,18 @@ pub struct ThreatIntelligenceAlertRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl ThreatIntelligenceAlertRuleProperties {
@@ -9135,7 +9598,12 @@ pub mod threat_intelligence_alert_rule_template {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ThreatIntelligenceAppendTags {
     #[doc = "List of tags to be appended."]
-    #[serde(rename = "threatIntelligenceTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatIntelligenceTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_intelligence_tags: Vec<String>,
 }
 impl ThreatIntelligenceAppendTags {
@@ -9189,22 +9657,49 @@ pub struct ThreatIntelligenceFilteringCriteria {
     #[serde(rename = "includeDisabled", default, skip_serializing_if = "Option::is_none")]
     pub include_disabled: Option<bool>,
     #[doc = "Columns to sort by and sorting order"]
-    #[serde(rename = "sortBy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sortBy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sort_by: Vec<ThreatIntelligenceSortingCriteria>,
     #[doc = "Sources of threat intelligence indicators"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sources: Vec<String>,
     #[doc = "Pattern types"]
-    #[serde(rename = "patternTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern_types: Vec<String>,
     #[doc = "Threat types of threat intelligence indicators"]
-    #[serde(rename = "threatTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_types: Vec<String>,
     #[doc = "Ids of threat intelligence indicators"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ids: Vec<String>,
     #[doc = "Keywords for searching threat intelligence indicators"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keywords: Vec<String>,
     #[doc = "Skip token."]
     #[serde(rename = "skipToken", default, skip_serializing_if = "Option::is_none")]
@@ -9225,7 +9720,11 @@ pub struct ThreatIntelligenceGranularMarkingModel {
     #[serde(rename = "markingRef", default, skip_serializing_if = "Option::is_none")]
     pub marking_ref: Option<i32>,
     #[doc = "granular marking model selectors"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selectors: Vec<String>,
 }
 impl ThreatIntelligenceGranularMarkingModel {
@@ -9256,7 +9755,12 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(flatten)]
     pub entity_common_properties: EntityCommonProperties,
     #[doc = "List of tags"]
-    #[serde(rename = "threatIntelligenceTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatIntelligenceTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_intelligence_tags: Vec<String>,
     #[doc = "Last updated time in UTC"]
     #[serde(rename = "lastUpdatedTimeUtc", default, skip_serializing_if = "Option::is_none")]
@@ -9271,7 +9775,12 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Indicator types of threat intelligence entities"]
-    #[serde(rename = "indicatorTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "indicatorTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub indicator_types: Vec<String>,
     #[doc = "Pattern of a threat intelligence entity"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -9283,10 +9792,20 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(rename = "patternVersion", default, skip_serializing_if = "Option::is_none")]
     pub pattern_version: Option<String>,
     #[doc = "Kill chain phases"]
-    #[serde(rename = "killChainPhases", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "killChainPhases",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kill_chain_phases: Vec<ThreatIntelligenceKillChainPhase>,
     #[doc = "Parsed patterns"]
-    #[serde(rename = "parsedPattern", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parsedPattern",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parsed_pattern: Vec<ThreatIntelligenceParsedPattern>,
     #[doc = "External ID of threat intelligence entity"]
     #[serde(rename = "externalId", default, skip_serializing_if = "Option::is_none")]
@@ -9301,13 +9820,27 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(rename = "externalLastUpdatedTimeUtc", default, skip_serializing_if = "Option::is_none")]
     pub external_last_updated_time_utc: Option<String>,
     #[doc = "External References"]
-    #[serde(rename = "externalReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_references: Vec<ThreatIntelligenceExternalReference>,
     #[doc = "Granular Markings"]
-    #[serde(rename = "granularMarkings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "granularMarkings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub granular_markings: Vec<ThreatIntelligenceGranularMarkingModel>,
     #[doc = "Labels  of threat intelligence entity"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "Is threat intelligence entity revoked"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -9316,13 +9849,23 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub confidence: Option<i32>,
     #[doc = "Threat intelligence entity object marking references"]
-    #[serde(rename = "objectMarkingRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "objectMarkingRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub object_marking_refs: Vec<String>,
     #[doc = "Language of threat intelligence entity"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub language: Option<String>,
     #[doc = "Threat types"]
-    #[serde(rename = "threatTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_types: Vec<String>,
     #[doc = "Valid from"]
     #[serde(rename = "validFrom", default, skip_serializing_if = "Option::is_none")]
@@ -9403,13 +9946,28 @@ pub struct ThreatIntelligenceMetric {
     #[serde(rename = "lastUpdatedTimeUtc", default, skip_serializing_if = "Option::is_none")]
     pub last_updated_time_utc: Option<String>,
     #[doc = "Threat type metrics"]
-    #[serde(rename = "threatTypeMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatTypeMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_type_metrics: Vec<ThreatIntelligenceMetricEntity>,
     #[doc = "Pattern type metrics"]
-    #[serde(rename = "patternTypeMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternTypeMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern_type_metrics: Vec<ThreatIntelligenceMetricEntity>,
     #[doc = "Source metrics"]
-    #[serde(rename = "sourceMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_metrics: Vec<ThreatIntelligenceMetricEntity>,
 }
 impl ThreatIntelligenceMetric {
@@ -9462,7 +10020,12 @@ pub struct ThreatIntelligenceParsedPattern {
     #[serde(rename = "patternTypeKey", default, skip_serializing_if = "Option::is_none")]
     pub pattern_type_key: Option<String>,
     #[doc = "Pattern type keys"]
-    #[serde(rename = "patternTypeValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternTypeValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern_type_values: Vec<ThreatIntelligenceParsedPatternTypeValue>,
 }
 impl ThreatIntelligenceParsedPattern {
@@ -9773,7 +10336,11 @@ pub struct TimelineResultsMetadata {
     #[doc = "timeline aggregation per kind"]
     pub aggregations: Vec<TimelineAggregation>,
     #[doc = "information about the failure queries"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<TimelineError>,
 }
 impl TimelineResultsMetadata {
@@ -9847,7 +10414,12 @@ impl Serialize for UebaDataSources {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UebaProperties {
     #[doc = "The relevant data sources that enriched by ueba"]
-    #[serde(rename = "dataSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_sources: Vec<UebaDataSources>,
 }
 impl UebaProperties {
@@ -9880,7 +10452,12 @@ pub struct ValidationError {
     #[serde(rename = "recordIndex", default, skip_serializing_if = "Option::is_none")]
     pub record_index: Option<i32>,
     #[doc = "A list of descriptions of the error."]
-    #[serde(rename = "errorMessages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorMessages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_messages: Vec<String>,
 }
 impl ValidationError {
@@ -10085,7 +10662,11 @@ pub struct WatchlistProperties {
     #[serde(rename = "isDeleted", default, skip_serializing_if = "Option::is_none")]
     pub is_deleted: Option<bool>,
     #[doc = "List of labels relevant to this watchlist"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
     #[doc = "The default duration of a watchlist (in ISO 8601 duration format)"]
     #[serde(rename = "defaultDuration", default, skip_serializing_if = "Option::is_none")]
@@ -10223,10 +10804,18 @@ impl MetadataAuthor {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetadataCategories {
     #[doc = "domain for the solution content item"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domains: Vec<String>,
     #[doc = "Industry verticals for the solution content item"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub verticals: Vec<String>,
 }
 impl MetadataCategories {
@@ -10256,7 +10845,11 @@ pub struct MetadataDependencies {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<metadata_dependencies::Operator>,
     #[doc = "This is the list of dependencies we must fulfill, according to the AND/OR operator"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub criteria: Vec<MetadataDependencies>,
 }
 impl MetadataDependencies {
diff --git a/services/mgmt/securityinsights/src/package_preview_2022_09/models.rs b/services/mgmt/securityinsights/src/package_preview_2022_09/models.rs
index fc243e38b7..bf837c09de 100644
--- a/services/mgmt/securityinsights/src/package_preview_2022_09/models.rs
+++ b/services/mgmt/securityinsights/src/package_preview_2022_09/models.rs
@@ -352,7 +352,12 @@ pub struct ActivityEntityQueriesProperties {
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "List of the fields of the source entity that are required to run the query"]
-    #[serde(rename = "requiredInputFieldsSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredInputFieldsSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_input_fields_sets: Vec<Vec<String>>,
     #[doc = "The query applied only to entities matching to all filters"]
     #[serde(rename = "entitiesFilter", default, skip_serializing_if = "Option::is_none")]
@@ -440,13 +445,23 @@ pub struct ActivityEntityQueryTemplateProperties {
     #[serde(rename = "queryDefinitions", default, skip_serializing_if = "Option::is_none")]
     pub query_definitions: Option<activity_entity_query_template_properties::QueryDefinitions>,
     #[doc = "List of required data types for the given entity query template"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<DataTypeDefinitions>,
     #[doc = "The type of the entity"]
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "List of the fields of the source entity that are required to run the query"]
-    #[serde(rename = "requiredInputFieldsSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredInputFieldsSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_input_fields_sets: Vec<Vec<String>>,
     #[doc = "The query applied only to entities matching to all filters"]
     #[serde(rename = "entitiesFilter", default, skip_serializing_if = "Option::is_none")]
@@ -632,7 +647,12 @@ pub struct AlertRuleTemplateDataSource {
     #[serde(rename = "connectorId", default, skip_serializing_if = "Option::is_none")]
     pub connector_id: Option<String>,
     #[doc = "The data types used by the alert rule template"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<String>,
 }
 impl AlertRuleTemplateDataSource {
@@ -659,7 +679,12 @@ pub struct AlertRuleTemplatePropertiesBase {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The required data sources for this template"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<AlertRuleTemplateDataSource>,
     #[doc = "The alert rule template status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -715,10 +740,18 @@ pub struct AlertRuleTemplateWithMitreProperties {
     #[serde(flatten)]
     pub alert_rule_template_properties_base: AlertRuleTemplatePropertiesBase,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl AlertRuleTemplateWithMitreProperties {
@@ -887,13 +920,26 @@ pub struct AnomalySecurityMlAnalyticsSettingsProperties {
     #[serde(rename = "lastModifiedUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_modified_utc: Option<time::OffsetDateTime>,
     #[doc = "The required data sources for this SecurityMLAnalyticsSettings"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<SecurityMlAnalyticsSettingsDataSource>,
     #[doc = "The tactics of the SecurityMLAnalyticsSettings"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the SecurityMLAnalyticsSettings"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The anomaly version of the AnomalySecurityMLAnalyticsSettings."]
     #[serde(rename = "anomalyVersion")]
@@ -1013,10 +1059,18 @@ pub struct AnomalyTimelineItem {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub intent: Option<String>,
     #[doc = "The techniques of the anomaly."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The reasons that cause the anomaly."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reasons: Vec<String>,
 }
 impl AnomalyTimelineItem {
@@ -1159,7 +1213,12 @@ impl AutomationRuleAction {
 pub struct AutomationRuleBooleanCondition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<AutomationRuleBooleanConditionSupportedOperator>,
-    #[serde(rename = "innerConditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "innerConditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inner_conditions: Vec<AutomationRuleCondition>,
 }
 impl AutomationRuleBooleanCondition {
@@ -1453,7 +1512,12 @@ pub struct AutomationRulePropertyArrayValuesCondition {
     pub array_type: Option<AutomationRulePropertyArrayConditionSupportedArrayType>,
     #[serde(rename = "arrayConditionType", default, skip_serializing_if = "Option::is_none")]
     pub array_condition_type: Option<AutomationRulePropertyArrayConditionSupportedArrayConditionType>,
-    #[serde(rename = "itemConditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "itemConditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub item_conditions: Vec<AutomationRuleCondition>,
 }
 impl AutomationRulePropertyArrayValuesCondition {
@@ -1880,7 +1944,12 @@ pub struct AutomationRulePropertyValuesChangedCondition {
     pub change_type: Option<AutomationRulePropertyChangedConditionSupportedChangedType>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<AutomationRulePropertyConditionSupportedOperator>,
-    #[serde(rename = "propertyValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_values: Vec<String>,
 }
 impl AutomationRulePropertyValuesChangedCondition {
@@ -1895,7 +1964,12 @@ pub struct AutomationRulePropertyValuesCondition {
     pub property_name: Option<AutomationRulePropertyConditionSupportedProperty>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<AutomationRulePropertyConditionSupportedOperator>,
-    #[serde(rename = "propertyValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_values: Vec<String>,
 }
 impl AutomationRulePropertyValuesCondition {
@@ -1933,7 +2007,11 @@ pub struct AutomationRuleTriggeringLogic {
     #[serde(rename = "triggersWhen")]
     pub triggers_when: TriggersWhen,
     #[doc = "The conditions to evaluate to determine if the automation rule should be triggered on a given object."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<AutomationRuleCondition>,
 }
 impl AutomationRuleTriggeringLogic {
@@ -1949,7 +2027,11 @@ impl AutomationRuleTriggeringLogic {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AutomationRulesList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AutomationRule>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -2148,7 +2230,12 @@ pub struct BookmarkEntityMappings {
     #[serde(rename = "entityType", default, skip_serializing_if = "Option::is_none")]
     pub entity_type: Option<String>,
     #[doc = "Array of fields mapping for that entity type"]
-    #[serde(rename = "fieldMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_mappings: Vec<EntityFieldMapping>,
 }
 impl BookmarkEntityMappings {
@@ -2195,10 +2282,18 @@ pub mod bookmark_expand_response {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Value {
         #[doc = "Array of the expansion result entities."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub entities: Vec<Entity>,
         #[doc = "Array of expansion result connected entities"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub edges: Vec<ConnectedEntity>,
     }
     impl Value {
@@ -2240,7 +2335,11 @@ pub struct BookmarkProperties {
     #[serde(rename = "displayName")]
     pub display_name: String,
     #[doc = "List of labels relevant to this bookmark"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
     #[doc = "The notes of the bookmark"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2272,10 +2371,18 @@ pub struct BookmarkProperties {
     #[serde(rename = "entityMappings", default, skip_serializing_if = "Option::is_none")]
     pub entity_mappings: Option<EntityMappingsList>,
     #[doc = "A list of relevant mitre attacks"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "A list of relevant mitre techniques"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<AttackTechnique>,
 }
 impl BookmarkProperties {
@@ -2327,7 +2434,11 @@ pub struct BookmarkTimelineItem {
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
     pub created_by: Option<UserInfo>,
     #[doc = "List of labels relevant to this bookmark"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
 }
 impl BookmarkTimelineItem {
@@ -2815,7 +2926,11 @@ pub struct ConnectivityCriteria {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<connectivity_criteria::Type>,
     #[doc = "Queries for checking connectivity"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl ConnectivityCriteria {
@@ -3134,7 +3249,12 @@ pub struct DataConnectorConnectBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub password: Option<String>,
     #[doc = ""]
-    #[serde(rename = "requestConfigUserInputValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestConfigUserInputValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_config_user_input_values: Vec<serde_json::Value>,
 }
 impl DataConnectorConnectBody {
@@ -3719,7 +3839,11 @@ pub struct EnrichmentDomainWhoisContact {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub org: Option<String>,
     #[doc = "A list describing the street address for this contact"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub street: Vec<String>,
     #[doc = "The city for this contact"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3779,10 +3903,19 @@ pub struct EnrichmentDomainWhoisDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub contacts: Option<EnrichmentDomainWhoisContacts>,
     #[doc = "A list of name servers associated with this domain"]
-    #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nameServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name_servers: Vec<String>,
     #[doc = "The set of status flags for this whois record"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<String>,
 }
 impl EnrichmentDomainWhoisDetails {
@@ -3914,7 +4047,12 @@ impl EntityAnalytics {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EntityAnalyticsProperties {
     #[doc = "The relevant entity providers that are synced"]
-    #[serde(rename = "entityProviders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "entityProviders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entity_providers: Vec<EntityProviders>,
 }
 impl EntityAnalyticsProperties {
@@ -3991,10 +4129,18 @@ pub mod entity_expand_response {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Value {
         #[doc = "Array of the expansion result entities."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub entities: Vec<Entity>,
         #[doc = "Array of edges that connects the entity to the list of entities."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub edges: Vec<EntityEdges>,
     }
     impl Value {
@@ -4031,7 +4177,12 @@ pub struct EntityGetInsightsParameters {
     #[serde(rename = "addDefaultExtendedTimeRange", default, skip_serializing_if = "Option::is_none")]
     pub add_default_extended_time_range: Option<bool>,
     #[doc = "List of Insights Query Id. If empty, default value is all insights of this entity"]
-    #[serde(rename = "insightQueryIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "insightQueryIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub insight_query_ids: Vec<String>,
 }
 impl EntityGetInsightsParameters {
@@ -4051,7 +4202,11 @@ pub struct EntityGetInsightsResponse {
     #[serde(rename = "metaData", default, skip_serializing_if = "Option::is_none")]
     pub meta_data: Option<GetInsightsResultsMetadata>,
     #[doc = "The insights result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityInsightItem>,
 }
 impl EntityGetInsightsResponse {
@@ -4229,7 +4384,12 @@ pub struct EntityInsightItem {
     #[serde(rename = "tableQueryResults", default, skip_serializing_if = "Option::is_none")]
     pub table_query_results: Option<InsightsTableResult>,
     #[doc = "Query results for table insights query."]
-    #[serde(rename = "chartQueryResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "chartQueryResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub chart_query_results: Vec<InsightsTableResult>,
 }
 impl EntityInsightItem {
@@ -4282,7 +4442,12 @@ pub struct EntityMapping {
     #[serde(rename = "entityType", default, skip_serializing_if = "Option::is_none")]
     pub entity_type: Option<EntityMappingType>,
     #[doc = "array of field mappings for the given entity mapping"]
-    #[serde(rename = "fieldMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fieldMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub field_mappings: Vec<FieldMapping>,
 }
 impl EntityMapping {
@@ -4446,13 +4611,23 @@ impl EntityQueryItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EntityQueryItemProperties {
     #[doc = "Data types for template"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<serde_json::Value>,
     #[doc = "The type of the entity"]
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "Data types for template"]
-    #[serde(rename = "requiredInputFieldsSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredInputFieldsSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_input_fields_sets: Vec<Vec<String>>,
     #[doc = "The query applied only to entities matching to all filters"]
     #[serde(rename = "entitiesFilter", default, skip_serializing_if = "Option::is_none")]
@@ -4649,7 +4824,11 @@ impl Serialize for EntityTimelineKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct EntityTimelineParameters {
     #[doc = "Array of timeline Item kinds."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kinds: Vec<EntityTimelineKind>,
     #[doc = "The start timeline date, so the results returned are after this date."]
     #[serde(rename = "startTime", with = "azure_core::date::rfc3339")]
@@ -4678,7 +4857,11 @@ pub struct EntityTimelineResponse {
     #[serde(rename = "metaData", default, skip_serializing_if = "Option::is_none")]
     pub meta_data: Option<TimelineResultsMetadata>,
     #[doc = "The timeline result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityTimelineItem>,
 }
 impl EntityTimelineResponse {
@@ -4739,7 +4922,12 @@ impl EventGroupingSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpansionEntityQueriesProperties {
     #[doc = "List of the data sources that are required to run the query"]
-    #[serde(rename = "dataSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_sources: Vec<String>,
     #[doc = "The query display name"]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
@@ -4748,10 +4936,20 @@ pub struct ExpansionEntityQueriesProperties {
     #[serde(rename = "inputEntityType", default, skip_serializing_if = "Option::is_none")]
     pub input_entity_type: Option<EntityInnerType>,
     #[doc = "List of the fields of the source entity that are required to run the query"]
-    #[serde(rename = "inputFields", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inputFields",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub input_fields: Vec<String>,
     #[doc = "List of the desired output types to be constructed from the result"]
-    #[serde(rename = "outputEntityTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputEntityTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_entity_types: Vec<EntityInnerType>,
     #[doc = "The template query string to be parsed and formatted"]
     #[serde(rename = "queryTemplate", default, skip_serializing_if = "Option::is_none")]
@@ -4808,7 +5006,11 @@ impl ExpansionResultAggregation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpansionResultsMetadata {
     #[doc = "Information of the aggregated nodes in the expansion result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub aggregations: Vec<ExpansionResultAggregation>,
 }
 impl ExpansionResultsMetadata {
@@ -4910,7 +5112,12 @@ pub struct FileImportProperties {
     #[serde(rename = "errorFile", default, skip_serializing_if = "Option::is_none")]
     pub error_file: Option<FileMetadata>,
     #[doc = "An ordered list of some of the errors that were encountered during validation."]
-    #[serde(rename = "errorsPreview", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorsPreview",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors_preview: Vec<ValidationError>,
     #[doc = "Represents a file."]
     #[serde(rename = "importFile")]
@@ -5227,10 +5434,20 @@ pub struct FusionAlertRuleProperties {
     #[doc = "Determines whether this alert rule is enabled or disabled."]
     pub enabled: bool,
     #[doc = "Configuration for all supported source signals in fusion detection."]
-    #[serde(rename = "sourceSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_settings: Vec<FusionSourceSettings>,
     #[doc = "Configuration to exclude scenarios in fusion detection."]
-    #[serde(rename = "scenarioExclusionPatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scenarioExclusionPatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scenario_exclusion_patterns: Vec<FusionScenarioExclusionPattern>,
     #[doc = "The last time that this alert has been modified."]
     #[serde(rename = "lastModifiedUtc", default, with = "azure_core::date::rfc3339::option")]
@@ -5239,10 +5456,18 @@ pub struct FusionAlertRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl FusionAlertRuleProperties {
@@ -5297,7 +5522,12 @@ pub struct FusionAlertRuleTemplateProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The required data connectors for this template"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<AlertRuleTemplateDataSource>,
     #[doc = "The alert rule template status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5306,13 +5536,26 @@ pub struct FusionAlertRuleTemplateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule template"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "All supported source signal configurations consumed in fusion detection."]
-    #[serde(rename = "sourceSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_settings: Vec<FusionTemplateSourceSetting>,
 }
 impl FusionAlertRuleTemplateProperties {
@@ -5347,7 +5590,12 @@ pub struct FusionSourceSettings {
     #[serde(rename = "sourceName")]
     pub source_name: String,
     #[doc = "Configuration for all source subtypes under this source signal consumed in fusion detection."]
-    #[serde(rename = "sourceSubTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSubTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_sub_types: Vec<FusionSourceSubTypeSetting>,
 }
 impl FusionSourceSettings {
@@ -5391,7 +5639,11 @@ pub struct FusionSubTypeSeverityFilter {
     #[serde(rename = "isSupported", default, skip_serializing_if = "Option::is_none")]
     pub is_supported: Option<bool>,
     #[doc = "Individual Severity configuration settings for a given source subtype consumed in Fusion detection."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<FusionSubTypeSeverityFiltersItem>,
 }
 impl FusionSubTypeSeverityFilter {
@@ -5419,7 +5671,12 @@ pub struct FusionTemplateSourceSetting {
     #[serde(rename = "sourceName")]
     pub source_name: String,
     #[doc = "All supported source subtypes under this source signal consumed in fusion detection."]
-    #[serde(rename = "sourceSubTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceSubTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_sub_types: Vec<FusionTemplateSourceSubType>,
 }
 impl FusionTemplateSourceSetting {
@@ -5459,7 +5716,12 @@ pub struct FusionTemplateSubTypeSeverityFilter {
     #[serde(rename = "isSupported")]
     pub is_supported: bool,
     #[doc = "List of all supported severities for this source subtype consumed in Fusion detection."]
-    #[serde(rename = "severityFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "severityFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub severity_filters: Vec<AlertSeverityEnum>,
 }
 impl FusionTemplateSubTypeSeverityFilter {
@@ -5536,7 +5798,11 @@ pub struct GetInsightsResultsMetadata {
     #[serde(rename = "totalCount")]
     pub total_count: i32,
     #[doc = "information about the failed queries"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<GetInsightsErrorKind>,
 }
 impl GetInsightsResultsMetadata {
@@ -5551,7 +5817,11 @@ impl GetInsightsResultsMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GetQueriesResponse {
     #[doc = "The query result values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EntityQueryItem>,
 }
 impl GetQueriesResponse {
@@ -5604,13 +5874,28 @@ pub struct GroupingConfiguration {
     #[serde(rename = "matchingMethod")]
     pub matching_method: grouping_configuration::MatchingMethod,
     #[doc = "A list of entity types to group by (when matchingMethod is Selected). Only entities defined in the current alert rule may be used."]
-    #[serde(rename = "groupByEntities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByEntities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_entities: Vec<EntityMappingType>,
     #[doc = "A list of alert details to group by (when matchingMethod is Selected)"]
-    #[serde(rename = "groupByAlertDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByAlertDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_alert_details: Vec<String>,
     #[doc = "A list of custom details keys to group by (when matchingMethod is Selected). Only keys defined in the current alert rule may be used."]
-    #[serde(rename = "groupByCustomDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupByCustomDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_by_custom_details: Vec<String>,
 }
 impl GroupingConfiguration {
@@ -5705,7 +5990,11 @@ pub struct HuntingBookmarkProperties {
     #[serde(rename = "eventTime", default, with = "azure_core::date::rfc3339::option")]
     pub event_time: Option<time::OffsetDateTime>,
     #[doc = "List of labels relevant to this bookmark"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
     #[doc = "The notes of the bookmark"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5770,16 +6059,29 @@ pub struct IncidentAdditionalData {
     #[serde(rename = "commentsCount", default, skip_serializing_if = "Option::is_none")]
     pub comments_count: Option<i32>,
     #[doc = "List of product names of alerts in the incident"]
-    #[serde(rename = "alertProductNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alertProductNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alert_product_names: Vec<String>,
     #[doc = "The provider incident url to the incident in Microsoft 365 Defender portal"]
     #[serde(rename = "providerIncidentUrl", default, skip_serializing_if = "Option::is_none")]
     pub provider_incident_url: Option<String>,
     #[doc = "The tactics associated with incident"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques associated with incident's tactics'"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl IncidentAdditionalData {
@@ -5974,10 +6276,19 @@ impl IncidentConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IncidentEntitiesResponse {
     #[doc = "Array of the incident related entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entities: Vec<Entity>,
     #[doc = "The metadata from the incident related entities results."]
-    #[serde(rename = "metaData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metaData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meta_data: Vec<IncidentEntitiesResultsMetadata>,
 }
 impl IncidentEntitiesResponse {
@@ -6192,7 +6503,11 @@ pub struct IncidentProperties {
     #[serde(rename = "incidentNumber", default, skip_serializing_if = "Option::is_none")]
     pub incident_number: Option<i32>,
     #[doc = "List of labels relevant to this incident"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<IncidentLabel>,
     #[doc = "The name of the source provider that generated the incident"]
     #[serde(rename = "providerName", default, skip_serializing_if = "Option::is_none")]
@@ -6210,7 +6525,12 @@ pub struct IncidentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub owner: Option<IncidentOwnerInfo>,
     #[doc = "List of resource ids of Analytic rules related to the incident"]
-    #[serde(rename = "relatedAnalyticRuleIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "relatedAnalyticRuleIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub related_analytic_rule_ids: Vec<String>,
     #[doc = "The severity of the incident"]
     pub severity: IncidentSeverityEnum,
@@ -6269,7 +6589,11 @@ pub struct IncidentPropertiesAction {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub owner: Option<IncidentOwnerInfo>,
     #[doc = "List of labels to add to the incident."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<IncidentLabel>,
 }
 impl IncidentPropertiesAction {
@@ -6415,10 +6739,20 @@ pub mod insight_query_item_properties {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct TableQuery {
         #[doc = "List of insight column definitions."]
-        #[serde(rename = "columnsDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "columnsDefinitions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub columns_definitions: Vec<serde_json::Value>,
         #[doc = "List of insight queries definitions."]
-        #[serde(rename = "queriesDefinitions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "queriesDefinitions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries_definitions: Vec<serde_json::Value>,
     }
     impl TableQuery {
@@ -6473,10 +6807,18 @@ pub mod insight_query_item_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InsightsTableResult {
     #[doc = "Columns Metadata of the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<serde_json::Value>,
     #[doc = "Rows data of the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rows: Vec<Vec<String>>,
 }
 impl InsightsTableResult {
@@ -6494,7 +6836,11 @@ pub struct InstructionSteps {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Instruction step details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instructions: Vec<serde_json::Value>,
 }
 impl InstructionSteps {
@@ -6756,10 +7102,18 @@ pub struct MlBehaviorAnalyticsAlertRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl MlBehaviorAnalyticsAlertRuleProperties {
@@ -7055,16 +7409,31 @@ impl MicrosoftSecurityIncidentCreationAlertRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct MicrosoftSecurityIncidentCreationAlertRuleCommonProperties {
     #[doc = "the alerts' displayNames on which the cases will be generated"]
-    #[serde(rename = "displayNamesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_filter: Vec<String>,
     #[doc = "the alerts' displayNames on which the cases will not be generated"]
-    #[serde(rename = "displayNamesExcludeFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesExcludeFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_exclude_filter: Vec<String>,
     #[doc = "The alerts' productName on which the cases will be generated"]
     #[serde(rename = "productFilter")]
     pub product_filter: MicrosoftSecurityProductName,
     #[doc = "the alerts' severities on which the cases will be generated"]
-    #[serde(rename = "severitiesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "severitiesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub severities_filter: Vec<AlertSeverityEnum>,
 }
 impl MicrosoftSecurityIncidentCreationAlertRuleCommonProperties {
@@ -7136,16 +7505,31 @@ pub struct MicrosoftSecurityIncidentCreationAlertRuleTemplateProperties {
     #[serde(flatten)]
     pub alert_rule_template_properties_base: AlertRuleTemplatePropertiesBase,
     #[doc = "the alerts' displayNames on which the cases will be generated"]
-    #[serde(rename = "displayNamesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_filter: Vec<String>,
     #[doc = "the alerts' displayNames on which the cases will not be generated"]
-    #[serde(rename = "displayNamesExcludeFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "displayNamesExcludeFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub display_names_exclude_filter: Vec<String>,
     #[doc = "The alerts' productName on which the cases will be generated"]
     #[serde(rename = "productFilter", default, skip_serializing_if = "Option::is_none")]
     pub product_filter: Option<MicrosoftSecurityProductName>,
     #[doc = "the alerts' severities on which the cases will be generated"]
-    #[serde(rename = "severitiesFilter", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "severitiesFilter",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub severities_filter: Vec<AlertSeverityEnum>,
 }
 impl MicrosoftSecurityIncidentCreationAlertRuleTemplateProperties {
@@ -7270,10 +7654,18 @@ pub struct NrtAlertRuleProperties {
     #[doc = "The query that creates alerts for this rule."]
     pub query: String,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The display name for alerts created by this alert rule."]
     #[serde(rename = "displayName")]
@@ -7794,10 +8186,19 @@ impl OperationsList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permissions {
     #[doc = "Resource provider permissions required for the connector"]
-    #[serde(rename = "resourceProvider", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceProvider",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_provider: Vec<serde_json::Value>,
     #[doc = "Customs permissions required for the connector"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub customs: Vec<serde_json::Value>,
 }
 impl Permissions {
@@ -7983,7 +8384,11 @@ pub struct Repo {
     #[serde(rename = "fullName", default, skip_serializing_if = "Option::is_none")]
     pub full_name: Option<String>,
     #[doc = "Array of branches."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub branches: Vec<String>,
 }
 impl Repo {
@@ -8064,7 +8469,12 @@ pub struct Repository {
     #[serde(rename = "deploymentLogsUrl", default, skip_serializing_if = "Option::is_none")]
     pub deployment_logs_url: Option<String>,
     #[doc = "Dictionary of source control content type and path mapping."]
-    #[serde(rename = "pathMapping", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pathMapping",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path_mapping: Vec<ContentPathMap>,
 }
 impl Repository {
@@ -8375,10 +8785,18 @@ pub struct ScheduledAlertRuleProperties {
     #[serde(rename = "suppressionEnabled")]
     pub suppression_enabled: bool,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "Incident Configuration property bag."]
     #[serde(rename = "incidentConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -8438,7 +8856,12 @@ pub struct ScheduledAlertRuleTemplateProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "The required data connectors for this template"]
-    #[serde(rename = "requiredDataConnectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredDataConnectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_data_connectors: Vec<AlertRuleTemplateDataSource>,
     #[doc = "The alert rule template status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8462,10 +8885,18 @@ pub struct ScheduledAlertRuleTemplateProperties {
     #[serde(rename = "triggerThreshold", default, skip_serializing_if = "Option::is_none")]
     pub trigger_threshold: Option<i32>,
     #[doc = "The tactics of the alert rule template"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
     #[doc = "The version of this template - in format <a.b.c>, where all are numbers. For example <1.0.2>."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8520,7 +8951,12 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "confidenceLevel", default, skip_serializing_if = "Option::is_none")]
     pub confidence_level: Option<security_alert_properties::ConfidenceLevel>,
     #[doc = "The confidence reasons"]
-    #[serde(rename = "confidenceReasons", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "confidenceReasons",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub confidence_reasons: Vec<serde_json::Value>,
     #[doc = "The confidence score of the alert."]
     #[serde(rename = "confidenceScore", default, skip_serializing_if = "Option::is_none")]
@@ -8553,7 +8989,12 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "productVersion", default, skip_serializing_if = "Option::is_none")]
     pub product_version: Option<String>,
     #[doc = "Manual action items to take to remediate the alert."]
-    #[serde(rename = "remediationSteps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "remediationSteps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub remediation_steps: Vec<String>,
     #[doc = "The severity of the alert"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8568,7 +9009,11 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "systemAlertId", default, skip_serializing_if = "Option::is_none")]
     pub system_alert_id: Option<String>,
     #[doc = "The tactics of the alert"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The time the alert was generated."]
     #[serde(rename = "timeGenerated", default, with = "azure_core::date::rfc3339::option")]
@@ -8580,7 +9025,12 @@ pub struct SecurityAlertProperties {
     #[serde(rename = "alertLink", default, skip_serializing_if = "Option::is_none")]
     pub alert_link: Option<String>,
     #[doc = "The list of resource identifiers of the alert."]
-    #[serde(rename = "resourceIdentifiers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceIdentifiers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_identifiers: Vec<serde_json::Value>,
 }
 impl SecurityAlertProperties {
@@ -8855,7 +9305,12 @@ pub struct SecurityMlAnalyticsSettingsDataSource {
     #[serde(rename = "connectorId", default, skip_serializing_if = "Option::is_none")]
     pub connector_id: Option<String>,
     #[doc = "The data types used by the security ml analytics settings"]
-    #[serde(rename = "dataTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_types: Vec<String>,
 }
 impl SecurityMlAnalyticsSettingsDataSource {
@@ -9216,10 +9671,20 @@ pub struct TeamProperties {
     #[serde(rename = "teamDescription", default, skip_serializing_if = "Option::is_none")]
     pub team_description: Option<String>,
     #[doc = "List of member IDs to add to the team"]
-    #[serde(rename = "memberIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "memberIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub member_ids: Vec<String>,
     #[doc = "List of group IDs to add their members to the team"]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
 }
 impl TeamProperties {
@@ -9270,10 +9735,18 @@ pub struct ThreatIntelligenceAlertRuleProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub severity: Option<AlertSeverityEnum>,
     #[doc = "The tactics of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tactics: Vec<AttackTactic>,
     #[doc = "The techniques of the alert rule"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub techniques: Vec<String>,
 }
 impl ThreatIntelligenceAlertRuleProperties {
@@ -9330,7 +9803,12 @@ pub mod threat_intelligence_alert_rule_template {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ThreatIntelligenceAppendTags {
     #[doc = "List of tags to be appended."]
-    #[serde(rename = "threatIntelligenceTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatIntelligenceTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_intelligence_tags: Vec<String>,
 }
 impl ThreatIntelligenceAppendTags {
@@ -9384,22 +9862,49 @@ pub struct ThreatIntelligenceFilteringCriteria {
     #[serde(rename = "includeDisabled", default, skip_serializing_if = "Option::is_none")]
     pub include_disabled: Option<bool>,
     #[doc = "Columns to sort by and sorting order"]
-    #[serde(rename = "sortBy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sortBy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sort_by: Vec<ThreatIntelligenceSortingCriteria>,
     #[doc = "Sources of threat intelligence indicators"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sources: Vec<String>,
     #[doc = "Pattern types"]
-    #[serde(rename = "patternTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern_types: Vec<String>,
     #[doc = "Threat types of threat intelligence indicators"]
-    #[serde(rename = "threatTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_types: Vec<String>,
     #[doc = "Ids of threat intelligence indicators"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ids: Vec<String>,
     #[doc = "Keywords for searching threat intelligence indicators"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keywords: Vec<String>,
     #[doc = "Skip token."]
     #[serde(rename = "skipToken", default, skip_serializing_if = "Option::is_none")]
@@ -9420,7 +9925,11 @@ pub struct ThreatIntelligenceGranularMarkingModel {
     #[serde(rename = "markingRef", default, skip_serializing_if = "Option::is_none")]
     pub marking_ref: Option<i32>,
     #[doc = "granular marking model selectors"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub selectors: Vec<String>,
 }
 impl ThreatIntelligenceGranularMarkingModel {
@@ -9451,7 +9960,12 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(flatten)]
     pub entity_common_properties: EntityCommonProperties,
     #[doc = "List of tags"]
-    #[serde(rename = "threatIntelligenceTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatIntelligenceTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_intelligence_tags: Vec<String>,
     #[doc = "Last updated time in UTC"]
     #[serde(rename = "lastUpdatedTimeUtc", default, skip_serializing_if = "Option::is_none")]
@@ -9466,7 +9980,12 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Indicator types of threat intelligence entities"]
-    #[serde(rename = "indicatorTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "indicatorTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub indicator_types: Vec<String>,
     #[doc = "Pattern of a threat intelligence entity"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -9478,10 +9997,20 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(rename = "patternVersion", default, skip_serializing_if = "Option::is_none")]
     pub pattern_version: Option<String>,
     #[doc = "Kill chain phases"]
-    #[serde(rename = "killChainPhases", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "killChainPhases",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub kill_chain_phases: Vec<ThreatIntelligenceKillChainPhase>,
     #[doc = "Parsed patterns"]
-    #[serde(rename = "parsedPattern", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parsedPattern",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parsed_pattern: Vec<ThreatIntelligenceParsedPattern>,
     #[doc = "External ID of threat intelligence entity"]
     #[serde(rename = "externalId", default, skip_serializing_if = "Option::is_none")]
@@ -9496,13 +10025,27 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(rename = "externalLastUpdatedTimeUtc", default, skip_serializing_if = "Option::is_none")]
     pub external_last_updated_time_utc: Option<String>,
     #[doc = "External References"]
-    #[serde(rename = "externalReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_references: Vec<ThreatIntelligenceExternalReference>,
     #[doc = "Granular Markings"]
-    #[serde(rename = "granularMarkings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "granularMarkings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub granular_markings: Vec<ThreatIntelligenceGranularMarkingModel>,
     #[doc = "Labels  of threat intelligence entity"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "Is threat intelligence entity revoked"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -9511,13 +10054,23 @@ pub struct ThreatIntelligenceIndicatorProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub confidence: Option<i32>,
     #[doc = "Threat intelligence entity object marking references"]
-    #[serde(rename = "objectMarkingRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "objectMarkingRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub object_marking_refs: Vec<String>,
     #[doc = "Language of threat intelligence entity"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub language: Option<String>,
     #[doc = "Threat types"]
-    #[serde(rename = "threatTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_types: Vec<String>,
     #[doc = "Valid from"]
     #[serde(rename = "validFrom", default, skip_serializing_if = "Option::is_none")]
@@ -9598,13 +10151,28 @@ pub struct ThreatIntelligenceMetric {
     #[serde(rename = "lastUpdatedTimeUtc", default, skip_serializing_if = "Option::is_none")]
     pub last_updated_time_utc: Option<String>,
     #[doc = "Threat type metrics"]
-    #[serde(rename = "threatTypeMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "threatTypeMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub threat_type_metrics: Vec<ThreatIntelligenceMetricEntity>,
     #[doc = "Pattern type metrics"]
-    #[serde(rename = "patternTypeMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternTypeMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern_type_metrics: Vec<ThreatIntelligenceMetricEntity>,
     #[doc = "Source metrics"]
-    #[serde(rename = "sourceMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_metrics: Vec<ThreatIntelligenceMetricEntity>,
 }
 impl ThreatIntelligenceMetric {
@@ -9657,7 +10225,12 @@ pub struct ThreatIntelligenceParsedPattern {
     #[serde(rename = "patternTypeKey", default, skip_serializing_if = "Option::is_none")]
     pub pattern_type_key: Option<String>,
     #[doc = "Pattern type keys"]
-    #[serde(rename = "patternTypeValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "patternTypeValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pattern_type_values: Vec<ThreatIntelligenceParsedPatternTypeValue>,
 }
 impl ThreatIntelligenceParsedPattern {
@@ -9968,7 +10541,11 @@ pub struct TimelineResultsMetadata {
     #[doc = "timeline aggregation per kind"]
     pub aggregations: Vec<TimelineAggregation>,
     #[doc = "information about the failure queries"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<TimelineError>,
 }
 impl TimelineResultsMetadata {
@@ -10042,7 +10619,12 @@ impl Serialize for UebaDataSources {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UebaProperties {
     #[doc = "The relevant data sources that enriched by ueba"]
-    #[serde(rename = "dataSources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_sources: Vec<UebaDataSources>,
 }
 impl UebaProperties {
@@ -10075,7 +10657,12 @@ pub struct ValidationError {
     #[serde(rename = "recordIndex", default, skip_serializing_if = "Option::is_none")]
     pub record_index: Option<i32>,
     #[doc = "A list of descriptions of the error."]
-    #[serde(rename = "errorMessages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorMessages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_messages: Vec<String>,
 }
 impl ValidationError {
@@ -10280,7 +10867,11 @@ pub struct WatchlistProperties {
     #[serde(rename = "isDeleted", default, skip_serializing_if = "Option::is_none")]
     pub is_deleted: Option<bool>,
     #[doc = "List of labels relevant to this watchlist"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<Label>,
     #[doc = "The default duration of a watchlist (in ISO 8601 duration format)"]
     #[serde(rename = "defaultDuration", default, skip_serializing_if = "Option::is_none")]
@@ -10418,10 +11009,18 @@ impl MetadataAuthor {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetadataCategories {
     #[doc = "domain for the solution content item"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domains: Vec<String>,
     #[doc = "Industry verticals for the solution content item"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub verticals: Vec<String>,
 }
 impl MetadataCategories {
@@ -10451,7 +11050,11 @@ pub struct MetadataDependencies {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub operator: Option<metadata_dependencies::Operator>,
     #[doc = "This is the list of dependencies we must fulfill, according to the AND/OR operator"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub criteria: Vec<MetadataDependencies>,
 }
 impl MetadataDependencies {
diff --git a/services/mgmt/serialconsole/src/package_2018_05/models.rs b/services/mgmt/serialconsole/src/package_2018_05/models.rs
index 0fb584e90d..75e935bce9 100644
--- a/services/mgmt/serialconsole/src/package_2018_05/models.rs
+++ b/services/mgmt/serialconsole/src/package_2018_05/models.rs
@@ -28,7 +28,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -108,7 +112,11 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SerialConsoleOperations {
     #[doc = "A list of Serial Console operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<serde_json::Value>,
 }
 impl SerialConsoleOperations {
@@ -158,7 +166,11 @@ impl SerialPortConnectResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SerialPortListResult {
     #[doc = "The list of serial ports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SerialPort>,
 }
 impl SerialPortListResult {
diff --git a/services/mgmt/servicebus/src/package_2018_01_preview/models.rs b/services/mgmt/servicebus/src/package_2018_01_preview/models.rs
index eeb34c0374..14412fa1d1 100644
--- a/services/mgmt/servicebus/src/package_2018_01_preview/models.rs
+++ b/services/mgmt/servicebus/src/package_2018_01_preview/models.rs
@@ -113,7 +113,11 @@ pub mod arm_disaster_recovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArmDisasterRecoveryListResult {
     #[doc = "List of Alias(Disaster Recovery configurations)"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArmDisasterRecovery>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Alias(Disaster Recovery configuration)"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -416,10 +420,19 @@ pub mod error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<ErrorResponse>,
         #[doc = "The error additional info."]
-        #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalInfo",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_info: Vec<ErrorAdditionalInfo>,
     }
     impl Error {
@@ -432,7 +445,11 @@ pub mod error_response {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventHubListResult {
     #[doc = "Result of the List EventHubs operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Eventhub>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of EventHubs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -469,7 +486,12 @@ pub mod eventhub {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "Current number of shards on the Event Hub."]
-        #[serde(rename = "partitionIds", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "partitionIds",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub partition_ids: Vec<String>,
         #[doc = "Exact time the Event Hub was created."]
         #[serde(rename = "createdAt", default, with = "azure_core::date::rfc3339::option")]
@@ -639,7 +661,11 @@ pub mod ip_filter_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IpFilterRuleListResult {
     #[doc = "Result of the List IpFilter Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IpFilterRule>,
     #[doc = "Link to the next set of results. Not empty if Value contains an incomplete list of IpFilter Rules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -699,7 +725,11 @@ impl MessageCountDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationConfigListResult {
     #[doc = "List of Migration Configs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrationConfigProperties>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of migrationConfigurations"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -859,10 +889,20 @@ pub mod network_rule_set {
         #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
         pub default_action: Option<properties::DefaultAction>,
         #[doc = "List VirtualNetwork Rules"]
-        #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "virtualNetworkRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub virtual_network_rules: Vec<NwRuleSetVirtualNetworkRules>,
         #[doc = "List of IpRules"]
-        #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_rules: Vec<NwRuleSetIpRules>,
     }
     impl Properties {
@@ -915,7 +955,11 @@ pub mod network_rule_set {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkRuleSetListResult {
     #[doc = "Result of the List NetworkRuleSet operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkRuleSet>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of NetworkRuleSet."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -972,7 +1016,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of ServiceBus operations supported by the Microsoft.ServiceBus resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1023,7 +1071,11 @@ pub mod premium_messaging_regions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PremiumMessagingRegionsListResult {
     #[doc = "Result of the List PremiumMessagingRegions type."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PremiumMessagingRegions>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of PremiumMessagingRegions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1070,7 +1122,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "A collection of private endpoint connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "A link for the next page of private endpoint connection resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1180,10 +1236,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required Members"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required Zone Names"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1195,7 +1261,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "A link for the next page of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1283,7 +1353,11 @@ impl Rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RuleListResult {
     #[doc = "Result of the List Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Rule>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of rules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1353,7 +1427,11 @@ pub mod sb_authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbAuthorizationRuleListResult {
     #[doc = "Result of the List Authorization Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbAuthorizationRule>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Authorization Rules."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1399,7 +1477,11 @@ impl SbNamespace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbNamespaceListResult {
     #[doc = "Result of the List Namespace operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbNamespace>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Namespaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1511,7 +1593,11 @@ impl SbQueue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbQueueListResult {
     #[doc = "Result of the List Queues operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbQueue>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of queues."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1656,7 +1742,11 @@ impl SbSubscription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbSubscriptionListResult {
     #[doc = "Result of the List Subscriptions operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbSubscription>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of subscriptions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1755,7 +1845,11 @@ impl SbTopic {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbTopicListResult {
     #[doc = "Result of the List Topics operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbTopic>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of topics."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1941,7 +2035,11 @@ pub mod virtual_network_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkRuleListResult {
     #[doc = "Result of the List VirtualNetwork Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkRule>,
     #[doc = "Link to the next set of results. Not empty if Value contains an incomplete list of VirtualNetwork Rules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/servicebus/src/package_2021_01_preview/models.rs b/services/mgmt/servicebus/src/package_2021_01_preview/models.rs
index 709ccc57f5..5b4efb50c8 100644
--- a/services/mgmt/servicebus/src/package_2021_01_preview/models.rs
+++ b/services/mgmt/servicebus/src/package_2021_01_preview/models.rs
@@ -116,7 +116,11 @@ pub mod arm_disaster_recovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArmDisasterRecoveryListResult {
     #[doc = "List of Alias(Disaster Recovery configurations)"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArmDisasterRecovery>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Alias(Disaster Recovery configuration)"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -279,7 +283,12 @@ impl DictionaryValue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Encryption {
     #[doc = "Properties of KeyVault"]
-    #[serde(rename = "keyVaultProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyVaultProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_vault_properties: Vec<KeyVaultProperties>,
     #[doc = "Enumerates the possible value of keySource for Encryption"]
     #[serde(rename = "keySource", default, skip_serializing_if = "Option::is_none")]
@@ -368,10 +377,19 @@ pub mod error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<ErrorResponse>,
         #[doc = "The error additional info."]
-        #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalInfo",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_info: Vec<ErrorAdditionalInfo>,
     }
     impl Error {
@@ -494,7 +512,11 @@ impl MessageCountDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationConfigListResult {
     #[doc = "List of Migration Configs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrationConfigProperties>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of migrationConfigurations"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -660,10 +682,20 @@ pub mod network_rule_set {
         #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
         pub default_action: Option<properties::DefaultAction>,
         #[doc = "List VirtualNetwork Rules"]
-        #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "virtualNetworkRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub virtual_network_rules: Vec<NwRuleSetVirtualNetworkRules>,
         #[doc = "List of IpRules"]
-        #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_rules: Vec<NwRuleSetIpRules>,
     }
     impl Properties {
@@ -716,7 +748,11 @@ pub mod network_rule_set {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkRuleSetListResult {
     #[doc = "Result of the List NetworkRuleSet operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkRuleSet>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of NetworkRuleSet."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -773,7 +809,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of ServiceBus operations supported by the Microsoft.ServiceBus resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -823,7 +863,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "A collection of private endpoint connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "A link for the next page of private endpoint connection resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -933,10 +977,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required Members"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required Zone Names"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -948,7 +1002,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "A link for the next page of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1039,7 +1097,11 @@ impl Rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RuleListResult {
     #[doc = "Result of the List Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Rule>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of rules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1112,7 +1174,11 @@ pub mod sb_authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbAuthorizationRuleListResult {
     #[doc = "Result of the List Authorization Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbAuthorizationRule>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Authorization Rules."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1162,7 +1228,11 @@ impl SbNamespace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbNamespaceListResult {
     #[doc = "Result of the List Namespace operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbNamespace>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Namespaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1207,7 +1277,12 @@ pub struct SbNamespaceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<Encryption>,
     #[doc = "List of private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl SbNamespaceProperties {
@@ -1256,7 +1331,11 @@ impl SbQueue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbQueueListResult {
     #[doc = "Result of the List Queues operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbQueue>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of queues."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1404,7 +1483,11 @@ impl SbSubscription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbSubscriptionListResult {
     #[doc = "Result of the List Subscriptions operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbSubscription>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of subscriptions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1506,7 +1589,11 @@ impl SbTopic {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbTopicListResult {
     #[doc = "Result of the List Topics operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbTopic>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of topics."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/servicebus/src/package_2021_06_preview/models.rs b/services/mgmt/servicebus/src/package_2021_06_preview/models.rs
index 2a7a6ca53d..337a77dd71 100644
--- a/services/mgmt/servicebus/src/package_2021_06_preview/models.rs
+++ b/services/mgmt/servicebus/src/package_2021_06_preview/models.rs
@@ -116,7 +116,11 @@ pub mod arm_disaster_recovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArmDisasterRecoveryListResult {
     #[doc = "List of Alias(Disaster Recovery configurations)"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArmDisasterRecovery>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Alias(Disaster Recovery configuration)"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -264,7 +268,12 @@ impl CorrelationFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Encryption {
     #[doc = "Properties of KeyVault"]
-    #[serde(rename = "keyVaultProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyVaultProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_vault_properties: Vec<KeyVaultProperties>,
     #[doc = "Enumerates the possible value of keySource for Encryption"]
     #[serde(rename = "keySource", default, skip_serializing_if = "Option::is_none")]
@@ -353,10 +362,19 @@ pub mod error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<ErrorResponse>,
         #[doc = "The error additional info."]
-        #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalInfo",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_info: Vec<ErrorAdditionalInfo>,
     }
     impl Error {
@@ -479,7 +497,11 @@ impl MessageCountDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationConfigListResult {
     #[doc = "List of Migration Configs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrationConfigProperties>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of migrationConfigurations"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -648,10 +670,20 @@ pub mod network_rule_set {
         #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
         pub default_action: Option<properties::DefaultAction>,
         #[doc = "List VirtualNetwork Rules"]
-        #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "virtualNetworkRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub virtual_network_rules: Vec<NwRuleSetVirtualNetworkRules>,
         #[doc = "List of IpRules"]
-        #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_rules: Vec<NwRuleSetIpRules>,
         #[doc = "This determines if traffic is allowed over public network. By default it is enabled."]
         #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -749,7 +781,11 @@ pub mod network_rule_set {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkRuleSetListResult {
     #[doc = "Result of the List NetworkRuleSet operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkRuleSet>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of NetworkRuleSet."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -806,7 +842,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of ServiceBus operations supported by the Microsoft.ServiceBus resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -856,7 +896,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "A collection of private endpoint connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "A link for the next page of private endpoint connection resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -966,10 +1010,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required Members"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required Zone Names"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -981,7 +1035,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "A link for the next page of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1072,7 +1130,11 @@ impl Rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RuleListResult {
     #[doc = "Result of the List Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Rule>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of rules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1145,7 +1207,11 @@ pub mod sb_authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbAuthorizationRuleListResult {
     #[doc = "Result of the List Authorization Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbAuthorizationRule>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Authorization Rules."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1213,7 +1279,11 @@ impl SbNamespace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbNamespaceListResult {
     #[doc = "Result of the List Namespace operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbNamespace>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Namespaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1258,7 +1328,12 @@ pub struct SbNamespaceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<Encryption>,
     #[doc = "List of private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "This property disables SAS authentication for the Service Bus namespace."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -1310,7 +1385,11 @@ impl SbQueue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbQueueListResult {
     #[doc = "Result of the List Queues operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbQueue>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of queues."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1461,7 +1540,11 @@ impl SbSubscription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbSubscriptionListResult {
     #[doc = "Result of the List Subscriptions operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbSubscription>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of subscriptions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1569,7 +1652,11 @@ impl SbTopic {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbTopicListResult {
     #[doc = "Result of the List Topics operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbTopic>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of topics."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/servicebus/src/package_2021_11/models.rs b/services/mgmt/servicebus/src/package_2021_11/models.rs
index 55ac6cea68..8102d0302d 100644
--- a/services/mgmt/servicebus/src/package_2021_11/models.rs
+++ b/services/mgmt/servicebus/src/package_2021_11/models.rs
@@ -116,7 +116,11 @@ pub mod arm_disaster_recovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArmDisasterRecoveryListResult {
     #[doc = "List of Alias(Disaster Recovery configurations)"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArmDisasterRecovery>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Alias(Disaster Recovery configuration)"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -264,7 +268,12 @@ impl CorrelationFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Encryption {
     #[doc = "Properties of KeyVault"]
-    #[serde(rename = "keyVaultProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyVaultProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_vault_properties: Vec<KeyVaultProperties>,
     #[doc = "Enumerates the possible value of keySource for Encryption"]
     #[serde(rename = "keySource", default, skip_serializing_if = "Option::is_none")]
@@ -353,10 +362,19 @@ pub mod error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<ErrorResponse>,
         #[doc = "The error additional info."]
-        #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalInfo",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_info: Vec<ErrorAdditionalInfo>,
     }
     impl Error {
@@ -479,7 +497,11 @@ impl MessageCountDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationConfigListResult {
     #[doc = "List of Migration Configs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrationConfigProperties>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of migrationConfigurations"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -648,10 +670,20 @@ pub mod network_rule_set {
         #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
         pub default_action: Option<properties::DefaultAction>,
         #[doc = "List VirtualNetwork Rules"]
-        #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "virtualNetworkRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub virtual_network_rules: Vec<NwRuleSetVirtualNetworkRules>,
         #[doc = "List of IpRules"]
-        #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_rules: Vec<NwRuleSetIpRules>,
         #[doc = "This determines if traffic is allowed over public network. By default it is enabled."]
         #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -749,7 +781,11 @@ pub mod network_rule_set {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkRuleSetListResult {
     #[doc = "Result of the List NetworkRuleSet operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkRuleSet>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of NetworkRuleSet."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -815,7 +851,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of ServiceBus operations supported by the Microsoft.ServiceBus resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -865,7 +905,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "A collection of private endpoint connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "A link for the next page of private endpoint connection resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -975,10 +1019,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required Members"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required Zone Names"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -990,7 +1044,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "A link for the next page of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1102,7 +1160,11 @@ impl Rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RuleListResult {
     #[doc = "Result of the List Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Rule>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of rules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1175,7 +1237,11 @@ pub mod sb_authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbAuthorizationRuleListResult {
     #[doc = "Result of the List Authorization Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbAuthorizationRule>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Authorization Rules."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1243,7 +1309,11 @@ impl SbNamespace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbNamespaceListResult {
     #[doc = "Result of the List Namespace operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbNamespace>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Namespaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1288,7 +1358,12 @@ pub struct SbNamespaceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<Encryption>,
     #[doc = "List of private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "This property disables SAS authentication for the Service Bus namespace."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -1347,7 +1422,12 @@ pub struct SbNamespaceUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<Encryption>,
     #[doc = "List of private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "This property disables SAS authentication for the Service Bus namespace."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -1382,7 +1462,11 @@ impl SbQueue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbQueueListResult {
     #[doc = "Result of the List Queues operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbQueue>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of queues."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1533,7 +1617,11 @@ impl SbSubscription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbSubscriptionListResult {
     #[doc = "Result of the List Subscriptions operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbSubscription>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of subscriptions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1641,7 +1729,11 @@ impl SbTopic {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbTopicListResult {
     #[doc = "Result of the List Topics operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbTopic>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of topics."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/servicebus/src/package_2022_01_preview/models.rs b/services/mgmt/servicebus/src/package_2022_01_preview/models.rs
index 492b0bfd38..c9c2757b82 100644
--- a/services/mgmt/servicebus/src/package_2022_01_preview/models.rs
+++ b/services/mgmt/servicebus/src/package_2022_01_preview/models.rs
@@ -180,7 +180,11 @@ pub mod arm_disaster_recovery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ArmDisasterRecoveryListResult {
     #[doc = "List of Alias(Disaster Recovery configurations)"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ArmDisasterRecovery>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Alias(Disaster Recovery configuration)"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -328,7 +332,12 @@ impl CorrelationFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Encryption {
     #[doc = "Properties of KeyVault"]
-    #[serde(rename = "keyVaultProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyVaultProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_vault_properties: Vec<KeyVaultProperties>,
     #[doc = "Enumerates the possible value of keySource for Encryption"]
     #[serde(rename = "keySource", default, skip_serializing_if = "Option::is_none")]
@@ -447,10 +456,19 @@ pub mod error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "The error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<ErrorResponse>,
         #[doc = "The error additional info."]
-        #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalInfo",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_info: Vec<ErrorAdditionalInfo>,
     }
     impl Error {
@@ -637,7 +655,11 @@ impl MessageCountDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MigrationConfigListResult {
     #[doc = "List of Migration Configs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MigrationConfigProperties>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of migrationConfigurations"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -806,10 +828,20 @@ pub mod network_rule_set {
         #[serde(rename = "defaultAction", default, skip_serializing_if = "Option::is_none")]
         pub default_action: Option<properties::DefaultAction>,
         #[doc = "List VirtualNetwork Rules"]
-        #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "virtualNetworkRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub virtual_network_rules: Vec<NwRuleSetVirtualNetworkRules>,
         #[doc = "List of IpRules"]
-        #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipRules",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_rules: Vec<NwRuleSetIpRules>,
         #[doc = "This determines if traffic is allowed over public network. By default it is enabled."]
         #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -907,7 +939,11 @@ pub mod network_rule_set {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkRuleSetListResult {
     #[doc = "Result of the List NetworkRuleSet operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkRuleSet>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of NetworkRuleSet."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -973,7 +1009,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of ServiceBus operations supported by the Microsoft.ServiceBus resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1023,7 +1063,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "A collection of private endpoint connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "A link for the next page of private endpoint connection resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1133,10 +1177,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required Members"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required Zone Names"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1148,7 +1202,11 @@ impl PrivateLinkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourcesListResult {
     #[doc = "A collection of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "A link for the next page of private link resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1291,7 +1349,11 @@ impl Rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RuleListResult {
     #[doc = "Result of the List Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Rule>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of rules"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1364,7 +1426,11 @@ pub mod sb_authorization_rule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbAuthorizationRuleListResult {
     #[doc = "Result of the List Authorization Rules operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbAuthorizationRule>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Authorization Rules."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1432,7 +1498,11 @@ impl SbNamespace {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbNamespaceListResult {
     #[doc = "Result of the List Namespace operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbNamespace>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of Namespaces."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1480,7 +1550,12 @@ pub struct SbNamespaceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<Encryption>,
     #[doc = "List of private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "This property disables SAS authentication for the Service Bus namespace."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -1631,7 +1706,12 @@ pub struct SbNamespaceUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<Encryption>,
     #[doc = "List of private endpoint connections."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "This property disables SAS authentication for the Service Bus namespace."]
     #[serde(rename = "disableLocalAuth", default, skip_serializing_if = "Option::is_none")]
@@ -1666,7 +1746,11 @@ impl SbQueue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbQueueListResult {
     #[doc = "Result of the List Queues operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbQueue>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of queues."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1881,7 +1965,11 @@ impl SbSubscription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbSubscriptionListResult {
     #[doc = "Result of the List Subscriptions operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbSubscription>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of subscriptions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1989,7 +2077,11 @@ impl SbTopic {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SbTopicListResult {
     #[doc = "Result of the List Topics operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SbTopic>,
     #[doc = "Link to the next set of results. Not empty if Value contains incomplete list of topics."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/servicefabricmanagedclusters/src/package_2021_11_preview/models.rs b/services/mgmt/servicefabricmanagedclusters/src/package_2021_11_preview/models.rs
index bfed8ee810..bef464cff2 100644
--- a/services/mgmt/servicefabricmanagedclusters/src/package_2021_11_preview/models.rs
+++ b/services/mgmt/servicefabricmanagedclusters/src/package_2021_11_preview/models.rs
@@ -82,7 +82,11 @@ impl ApplicationResource {
 #[doc = "The list of application resources."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationResource>,
     #[doc = "URL to get the next set of application list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -115,7 +119,12 @@ pub struct ApplicationResourceProperties {
     #[serde(rename = "upgradePolicy", default, skip_serializing_if = "Option::is_none")]
     pub upgrade_policy: Option<ApplicationUpgradePolicy>,
     #[doc = "List of user assigned identities for the application, each mapped to a friendly name."]
-    #[serde(rename = "managedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_identities: Vec<ApplicationUserAssignedIdentity>,
 }
 impl ApplicationResourceProperties {
@@ -140,7 +149,11 @@ impl ApplicationTypeResource {
 #[doc = "The list of application type names."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationTypeResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationTypeResource>,
     #[doc = "URL to get the next set of application type list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -199,7 +212,11 @@ impl ApplicationTypeVersionResource {
 #[doc = "The list of application type version resources for the specified application type name resource."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationTypeVersionResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationTypeVersionResource>,
     #[doc = "URL to get the next set of application type version list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -930,7 +947,11 @@ impl ManagedClusterCodeVersionResult {
 #[doc = "Managed Cluster list results"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedCluster>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -966,7 +987,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "clusterState", default, skip_serializing_if = "Option::is_none")]
     pub cluster_state: Option<ClusterState>,
     #[doc = "List of thumbprints of the cluster certificates."]
-    #[serde(rename = "clusterCertificateThumbprints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterCertificateThumbprints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_certificate_thumbprints: Vec<String>,
     #[doc = "The port used for client connections to the cluster."]
     #[serde(rename = "clientConnectionPort", default, skip_serializing_if = "Option::is_none")]
@@ -981,22 +1007,41 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "adminPassword", default, skip_serializing_if = "Option::is_none")]
     pub admin_password: Option<String>,
     #[doc = "Load balancing rules that are applied to the public load balancer of the cluster."]
-    #[serde(rename = "loadBalancingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_rules: Vec<LoadBalancingRule>,
     #[doc = "Setting this to true enables RDP access to the VM. The default NSG rule opens RDP port to Internet which can be overridden with custom Network Security Rules. The default value for this setting is false."]
     #[serde(rename = "allowRdpAccess", default, skip_serializing_if = "Option::is_none")]
     pub allow_rdp_access: Option<bool>,
     #[doc = "Custom Network Security Rules that are applied to the Virtual Network of the cluster."]
-    #[serde(rename = "networkSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_rules: Vec<NetworkSecurityRule>,
     #[doc = "Client certificates that are allowed to manage the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clients: Vec<ClientCertificate>,
     #[doc = "The settings to enable AAD authentication on the cluster."]
     #[serde(rename = "azureActiveDirectory", default, skip_serializing_if = "Option::is_none")]
     pub azure_active_directory: Option<AzureActiveDirectory>,
     #[doc = "The list of custom fabric settings to configure the cluster."]
-    #[serde(rename = "fabricSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fabricSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fabric_settings: Vec<SettingsSectionDescription>,
     #[doc = "The provisioning state of the managed resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1011,7 +1056,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "clusterUpgradeCadence", default, skip_serializing_if = "Option::is_none")]
     pub cluster_upgrade_cadence: Option<ClusterUpgradeCadence>,
     #[doc = "List of add-on features to enable on the cluster."]
-    #[serde(rename = "addonFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addonFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub addon_features: Vec<ManagedClusterAddOnFeature>,
     #[doc = "Setting this to true enables automatic OS upgrade for the node types that are created using any platform OS image with version 'latest'. The default value for this setting is false."]
     #[serde(rename = "enableAutoOSUpgrade", default, skip_serializing_if = "Option::is_none")]
@@ -1029,7 +1079,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "subnetId", default, skip_serializing_if = "Option::is_none")]
     pub subnet_id: Option<String>,
     #[doc = "The list of IP tags associated with the default public IP address of the cluster."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<IpTag>,
     #[doc = "IPv6 address for the cluster if IPv6 is enabled."]
     #[serde(rename = "ipv6Address", default, skip_serializing_if = "Option::is_none")]
@@ -1038,10 +1093,20 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "enableServicePublicIP", default, skip_serializing_if = "Option::is_none")]
     pub enable_service_public_ip: Option<bool>,
     #[doc = "Auxiliary subnets for the cluster."]
-    #[serde(rename = "auxiliarySubnets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auxiliarySubnets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auxiliary_subnets: Vec<Subnet>,
     #[doc = "Service endpoints for subnets in the cluster."]
-    #[serde(rename = "serviceEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_endpoints: Vec<ServiceEndpoint>,
 }
 impl ManagedClusterProperties {
@@ -1243,7 +1308,11 @@ impl ManagedVmSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedVmSizesResult {
     #[doc = "List of Managed VM Sizes for Service Fabric Managed Clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedVmSize>,
     #[doc = "URL to get the next set of Managed VM Sizes if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1325,16 +1394,36 @@ pub struct NetworkSecurityRule {
     #[doc = "Network protocol this rule applies to."]
     pub protocol: network_security_rule::Protocol,
     #[doc = "The CIDR or source IP ranges."]
-    #[serde(rename = "sourceAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_address_prefixes: Vec<String>,
     #[doc = "The destination address prefixes. CIDR or destination IP ranges."]
-    #[serde(rename = "destinationAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_address_prefixes: Vec<String>,
     #[doc = "The source port ranges."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
     #[doc = "The destination port ranges."]
-    #[serde(rename = "destinationPortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_port_ranges: Vec<String>,
     #[doc = "The CIDR or source IP range. Asterisk '*' can also be used to match all source IPs. Default tags such as 'VirtualNetwork', 'AzureLoadBalancer' and 'Internet' can also be used. If this is an ingress rule, specifies where network traffic originates from."]
     #[serde(rename = "sourceAddressPrefix", default, skip_serializing_if = "Option::is_none")]
@@ -1569,7 +1658,11 @@ impl NodeTypeAvailableSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeTypeListResult {
     #[doc = "The list of node types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeType>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1590,7 +1683,11 @@ impl NodeTypeListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeTypeListSkuResult {
     #[doc = "The list of available node type SKUs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeTypeAvailableSku>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1653,10 +1750,20 @@ pub struct NodeTypeProperties {
     #[serde(rename = "vmImageVersion", default, skip_serializing_if = "Option::is_none")]
     pub vm_image_version: Option<String>,
     #[doc = "The secrets to install in the virtual machines."]
-    #[serde(rename = "vmSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_secrets: Vec<VaultSecretGroup>,
     #[doc = "Set of extensions that should be installed onto the virtual machines."]
-    #[serde(rename = "vmExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_extensions: Vec<VmssExtension>,
     #[doc = "Identities for the virtual machine scale set under the node type."]
     #[serde(rename = "vmManagedIdentity", default, skip_serializing_if = "Option::is_none")]
@@ -1668,13 +1775,28 @@ pub struct NodeTypeProperties {
     #[serde(rename = "multiplePlacementGroups", default, skip_serializing_if = "Option::is_none")]
     pub multiple_placement_groups: Option<bool>,
     #[doc = "Indicates the node type uses its own frontend configurations instead of the default one for the cluster. This setting can only be specified for non-primary node types and can not be added or removed after the node type is created."]
-    #[serde(rename = "frontendConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_configurations: Vec<FrontendConfiguration>,
     #[doc = "The Network Security Rules for this node type. This setting can only be specified for node types that are configured with frontend configurations."]
-    #[serde(rename = "networkSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_rules: Vec<NetworkSecurityRule>,
     #[doc = "Additional managed data disks."]
-    #[serde(rename = "additionalDataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalDataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_data_disks: Vec<VmssDataDisk>,
     #[doc = "Enable or disable the Host Encryption for the virtual machines on the node type. This will enable the encryption for all the disks including Resource/Temp disk at host itself. Default: The Encryption at host will be disabled unless this property is set to true for the resource."]
     #[serde(rename = "enableEncryptionAtHost", default, skip_serializing_if = "Option::is_none")]
@@ -1845,7 +1967,11 @@ impl NodeTypeUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Service Fabric resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2247,7 +2373,11 @@ pub struct ServiceEndpoint {
     #[doc = "The type of the endpoint service."]
     pub service: String,
     #[doc = "A list of locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl ServiceEndpoint {
@@ -2523,7 +2653,11 @@ impl ServiceResource {
 #[doc = "The list of service resources."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResource>,
     #[doc = "URL to get the next set of service list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3149,7 +3283,12 @@ pub struct VmssExtensionProperties {
     #[serde(rename = "forceUpdateTag", default, skip_serializing_if = "Option::is_none")]
     pub force_update_tag: Option<String>,
     #[doc = "Collection of extension names after which this extension needs to be provisioned."]
-    #[serde(rename = "provisionAfterExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisionAfterExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provision_after_extensions: Vec<String>,
     #[doc = "The provisioning state, which only appears in the response."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3222,7 +3361,12 @@ impl VaultSecretGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmManagedIdentity {
     #[doc = "The list of user identities associated with the virtual machine scale set under the node type. Each entry will be an ARM resource ids in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ManagedIdentity/userAssignedIdentities/{identityName}'."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<String>,
 }
 impl VmManagedIdentity {
diff --git a/services/mgmt/servicefabricmanagedclusters/src/package_2022_01/models.rs b/services/mgmt/servicefabricmanagedclusters/src/package_2022_01/models.rs
index 6165c4fedd..a17134a4a9 100644
--- a/services/mgmt/servicefabricmanagedclusters/src/package_2022_01/models.rs
+++ b/services/mgmt/servicefabricmanagedclusters/src/package_2022_01/models.rs
@@ -82,7 +82,11 @@ impl ApplicationResource {
 #[doc = "The list of application resources."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationResource>,
     #[doc = "URL to get the next set of application list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -115,7 +119,12 @@ pub struct ApplicationResourceProperties {
     #[serde(rename = "upgradePolicy", default, skip_serializing_if = "Option::is_none")]
     pub upgrade_policy: Option<ApplicationUpgradePolicy>,
     #[doc = "List of user assigned identities for the application, each mapped to a friendly name."]
-    #[serde(rename = "managedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_identities: Vec<ApplicationUserAssignedIdentity>,
 }
 impl ApplicationResourceProperties {
@@ -140,7 +149,11 @@ impl ApplicationTypeResource {
 #[doc = "The list of application type names."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationTypeResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationTypeResource>,
     #[doc = "URL to get the next set of application type list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -199,7 +212,11 @@ impl ApplicationTypeVersionResource {
 #[doc = "The list of application type version resources for the specified application type name resource."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationTypeVersionResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationTypeVersionResource>,
     #[doc = "URL to get the next set of application type version list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -961,7 +978,11 @@ impl ManagedClusterCodeVersionResult {
 #[doc = "Managed Cluster list results"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedCluster>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -997,7 +1018,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "clusterState", default, skip_serializing_if = "Option::is_none")]
     pub cluster_state: Option<ClusterState>,
     #[doc = "List of thumbprints of the cluster certificates."]
-    #[serde(rename = "clusterCertificateThumbprints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterCertificateThumbprints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_certificate_thumbprints: Vec<String>,
     #[doc = "The port used for client connections to the cluster."]
     #[serde(rename = "clientConnectionPort", default, skip_serializing_if = "Option::is_none")]
@@ -1012,22 +1038,41 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "adminPassword", default, skip_serializing_if = "Option::is_none")]
     pub admin_password: Option<String>,
     #[doc = "Load balancing rules that are applied to the public load balancer of the cluster."]
-    #[serde(rename = "loadBalancingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_rules: Vec<LoadBalancingRule>,
     #[doc = "Setting this to true enables RDP access to the VM. The default NSG rule opens RDP port to Internet which can be overridden with custom Network Security Rules. The default value for this setting is false."]
     #[serde(rename = "allowRdpAccess", default, skip_serializing_if = "Option::is_none")]
     pub allow_rdp_access: Option<bool>,
     #[doc = "Custom Network Security Rules that are applied to the Virtual Network of the cluster."]
-    #[serde(rename = "networkSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_rules: Vec<NetworkSecurityRule>,
     #[doc = "Client certificates that are allowed to manage the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clients: Vec<ClientCertificate>,
     #[doc = "The settings to enable AAD authentication on the cluster."]
     #[serde(rename = "azureActiveDirectory", default, skip_serializing_if = "Option::is_none")]
     pub azure_active_directory: Option<AzureActiveDirectory>,
     #[doc = "The list of custom fabric settings to configure the cluster."]
-    #[serde(rename = "fabricSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fabricSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fabric_settings: Vec<SettingsSectionDescription>,
     #[doc = "The provisioning state of the managed resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1042,7 +1087,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "clusterUpgradeCadence", default, skip_serializing_if = "Option::is_none")]
     pub cluster_upgrade_cadence: Option<ClusterUpgradeCadence>,
     #[doc = "List of add-on features to enable on the cluster."]
-    #[serde(rename = "addonFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addonFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub addon_features: Vec<ManagedClusterAddOnFeature>,
     #[doc = "Setting this to true enables automatic OS upgrade for the node types that are created using any platform OS image with version 'latest'. The default value for this setting is false."]
     #[serde(rename = "enableAutoOSUpgrade", default, skip_serializing_if = "Option::is_none")]
@@ -1060,7 +1110,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "subnetId", default, skip_serializing_if = "Option::is_none")]
     pub subnet_id: Option<String>,
     #[doc = "The list of IP tags associated with the default public IP address of the cluster."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<IpTag>,
     #[doc = "IPv6 address for the cluster if IPv6 is enabled."]
     #[serde(rename = "ipv6Address", default, skip_serializing_if = "Option::is_none")]
@@ -1069,10 +1124,20 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "enableServicePublicIP", default, skip_serializing_if = "Option::is_none")]
     pub enable_service_public_ip: Option<bool>,
     #[doc = "Auxiliary subnets for the cluster."]
-    #[serde(rename = "auxiliarySubnets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auxiliarySubnets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auxiliary_subnets: Vec<Subnet>,
     #[doc = "Service endpoints for subnets in the cluster."]
-    #[serde(rename = "serviceEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_endpoints: Vec<ServiceEndpoint>,
 }
 impl ManagedClusterProperties {
@@ -1274,7 +1339,11 @@ impl ManagedVmSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedVmSizesResult {
     #[doc = "List of Managed VM Sizes for Service Fabric Managed Clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedVmSize>,
     #[doc = "URL to get the next set of Managed VM Sizes if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1356,16 +1425,36 @@ pub struct NetworkSecurityRule {
     #[doc = "Network protocol this rule applies to."]
     pub protocol: network_security_rule::Protocol,
     #[doc = "The CIDR or source IP ranges."]
-    #[serde(rename = "sourceAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_address_prefixes: Vec<String>,
     #[doc = "The destination address prefixes. CIDR or destination IP ranges."]
-    #[serde(rename = "destinationAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_address_prefixes: Vec<String>,
     #[doc = "The source port ranges."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
     #[doc = "The destination port ranges."]
-    #[serde(rename = "destinationPortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_port_ranges: Vec<String>,
     #[doc = "The CIDR or source IP range. Asterisk '*' can also be used to match all source IPs. Default tags such as 'VirtualNetwork', 'AzureLoadBalancer' and 'Internet' can also be used. If this is an ingress rule, specifies where network traffic originates from."]
     #[serde(rename = "sourceAddressPrefix", default, skip_serializing_if = "Option::is_none")]
@@ -1600,7 +1689,11 @@ impl NodeTypeAvailableSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeTypeListResult {
     #[doc = "The list of node types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeType>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1621,7 +1714,11 @@ impl NodeTypeListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeTypeListSkuResult {
     #[doc = "The list of available node type SKUs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeTypeAvailableSku>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1684,10 +1781,20 @@ pub struct NodeTypeProperties {
     #[serde(rename = "vmImageVersion", default, skip_serializing_if = "Option::is_none")]
     pub vm_image_version: Option<String>,
     #[doc = "The secrets to install in the virtual machines."]
-    #[serde(rename = "vmSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_secrets: Vec<VaultSecretGroup>,
     #[doc = "Set of extensions that should be installed onto the virtual machines."]
-    #[serde(rename = "vmExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_extensions: Vec<VmssExtension>,
     #[doc = "Identities for the virtual machine scale set under the node type."]
     #[serde(rename = "vmManagedIdentity", default, skip_serializing_if = "Option::is_none")]
@@ -1699,13 +1806,28 @@ pub struct NodeTypeProperties {
     #[serde(rename = "multiplePlacementGroups", default, skip_serializing_if = "Option::is_none")]
     pub multiple_placement_groups: Option<bool>,
     #[doc = "Indicates the node type uses its own frontend configurations instead of the default one for the cluster. This setting can only be specified for non-primary node types and can not be added or removed after the node type is created."]
-    #[serde(rename = "frontendConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_configurations: Vec<FrontendConfiguration>,
     #[doc = "The Network Security Rules for this node type. This setting can only be specified for node types that are configured with frontend configurations."]
-    #[serde(rename = "networkSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_rules: Vec<NetworkSecurityRule>,
     #[doc = "Additional managed data disks."]
-    #[serde(rename = "additionalDataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalDataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_data_disks: Vec<VmssDataDisk>,
     #[doc = "Enable or disable the Host Encryption for the virtual machines on the node type. This will enable the encryption for all the disks including Resource/Temp disk at host itself. Default: The Encryption at host will be disabled unless this property is set to true for the resource."]
     #[serde(rename = "enableEncryptionAtHost", default, skip_serializing_if = "Option::is_none")]
@@ -1880,7 +2002,11 @@ impl NodeTypeUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Service Fabric resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2282,7 +2408,11 @@ pub struct ServiceEndpoint {
     #[doc = "The type of the endpoint service."]
     pub service: String,
     #[doc = "A list of locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl ServiceEndpoint {
@@ -2558,7 +2688,11 @@ impl ServiceResource {
 #[doc = "The list of service resources."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResource>,
     #[doc = "URL to get the next set of service list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3188,7 +3322,12 @@ pub struct VmssExtensionProperties {
     #[serde(rename = "forceUpdateTag", default, skip_serializing_if = "Option::is_none")]
     pub force_update_tag: Option<String>,
     #[doc = "Collection of extension names after which this extension needs to be provisioned."]
-    #[serde(rename = "provisionAfterExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisionAfterExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provision_after_extensions: Vec<String>,
     #[doc = "The provisioning state, which only appears in the response."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3265,7 +3404,12 @@ impl VaultSecretGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmManagedIdentity {
     #[doc = "The list of user identities associated with the virtual machine scale set under the node type. Each entry will be an ARM resource ids in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ManagedIdentity/userAssignedIdentities/{identityName}'."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<String>,
 }
 impl VmManagedIdentity {
diff --git a/services/mgmt/servicefabricmanagedclusters/src/package_2022_02_preview/models.rs b/services/mgmt/servicefabricmanagedclusters/src/package_2022_02_preview/models.rs
index bbbfa87078..f26d1ba8b9 100644
--- a/services/mgmt/servicefabricmanagedclusters/src/package_2022_02_preview/models.rs
+++ b/services/mgmt/servicefabricmanagedclusters/src/package_2022_02_preview/models.rs
@@ -82,7 +82,11 @@ impl ApplicationResource {
 #[doc = "The list of application resources."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationResource>,
     #[doc = "URL to get the next set of application list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -115,7 +119,12 @@ pub struct ApplicationResourceProperties {
     #[serde(rename = "upgradePolicy", default, skip_serializing_if = "Option::is_none")]
     pub upgrade_policy: Option<ApplicationUpgradePolicy>,
     #[doc = "List of user assigned identities for the application, each mapped to a friendly name."]
-    #[serde(rename = "managedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_identities: Vec<ApplicationUserAssignedIdentity>,
 }
 impl ApplicationResourceProperties {
@@ -140,7 +149,11 @@ impl ApplicationTypeResource {
 #[doc = "The list of application type names."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationTypeResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationTypeResource>,
     #[doc = "URL to get the next set of application type list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -199,7 +212,11 @@ impl ApplicationTypeVersionResource {
 #[doc = "The list of application type version resources for the specified application type name resource."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationTypeVersionResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationTypeVersionResource>,
     #[doc = "URL to get the next set of application type version list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -912,7 +929,12 @@ impl LongRunningOperationResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedAzResiliencyStatus {
     #[doc = "List of Managed VM Sizes for Service Fabric Managed Clusters."]
-    #[serde(rename = "baseResourceStatus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "baseResourceStatus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub base_resource_status: Vec<ResourceAzStatus>,
     #[doc = "URL to get the next set of Managed VM Sizes if there are any."]
     #[serde(rename = "isClusterZoneResilient", default, skip_serializing_if = "Option::is_none")]
@@ -1008,7 +1030,11 @@ impl ManagedClusterCodeVersionResult {
 #[doc = "Managed Cluster list results"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedCluster>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1044,7 +1070,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "clusterState", default, skip_serializing_if = "Option::is_none")]
     pub cluster_state: Option<ClusterState>,
     #[doc = "List of thumbprints of the cluster certificates."]
-    #[serde(rename = "clusterCertificateThumbprints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterCertificateThumbprints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_certificate_thumbprints: Vec<String>,
     #[doc = "The port used for client connections to the cluster."]
     #[serde(rename = "clientConnectionPort", default, skip_serializing_if = "Option::is_none")]
@@ -1059,22 +1090,41 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "adminPassword", default, skip_serializing_if = "Option::is_none")]
     pub admin_password: Option<String>,
     #[doc = "Load balancing rules that are applied to the public load balancer of the cluster."]
-    #[serde(rename = "loadBalancingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_rules: Vec<LoadBalancingRule>,
     #[doc = "Setting this to true enables RDP access to the VM. The default NSG rule opens RDP port to Internet which can be overridden with custom Network Security Rules. The default value for this setting is false."]
     #[serde(rename = "allowRdpAccess", default, skip_serializing_if = "Option::is_none")]
     pub allow_rdp_access: Option<bool>,
     #[doc = "Custom Network Security Rules that are applied to the Virtual Network of the cluster."]
-    #[serde(rename = "networkSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_rules: Vec<NetworkSecurityRule>,
     #[doc = "Client certificates that are allowed to manage the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clients: Vec<ClientCertificate>,
     #[doc = "The settings to enable AAD authentication on the cluster."]
     #[serde(rename = "azureActiveDirectory", default, skip_serializing_if = "Option::is_none")]
     pub azure_active_directory: Option<AzureActiveDirectory>,
     #[doc = "The list of custom fabric settings to configure the cluster."]
-    #[serde(rename = "fabricSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fabricSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fabric_settings: Vec<SettingsSectionDescription>,
     #[doc = "The provisioning state of the managed resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1089,7 +1139,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "clusterUpgradeCadence", default, skip_serializing_if = "Option::is_none")]
     pub cluster_upgrade_cadence: Option<ClusterUpgradeCadence>,
     #[doc = "List of add-on features to enable on the cluster."]
-    #[serde(rename = "addonFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addonFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub addon_features: Vec<ManagedClusterAddOnFeature>,
     #[doc = "Setting this to true enables automatic OS upgrade for the node types that are created using any platform OS image with version 'latest'. The default value for this setting is false."]
     #[serde(rename = "enableAutoOSUpgrade", default, skip_serializing_if = "Option::is_none")]
@@ -1107,7 +1162,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "subnetId", default, skip_serializing_if = "Option::is_none")]
     pub subnet_id: Option<String>,
     #[doc = "The list of IP tags associated with the default public IP address of the cluster."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<IpTag>,
     #[doc = "IPv6 address for the cluster if IPv6 is enabled."]
     #[serde(rename = "ipv6Address", default, skip_serializing_if = "Option::is_none")]
@@ -1116,10 +1176,20 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "enableServicePublicIP", default, skip_serializing_if = "Option::is_none")]
     pub enable_service_public_ip: Option<bool>,
     #[doc = "Auxiliary subnets for the cluster."]
-    #[serde(rename = "auxiliarySubnets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auxiliarySubnets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auxiliary_subnets: Vec<Subnet>,
     #[doc = "Service endpoints for subnets in the cluster."]
-    #[serde(rename = "serviceEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_endpoints: Vec<ServiceEndpoint>,
 }
 impl ManagedClusterProperties {
@@ -1321,7 +1391,11 @@ impl ManagedVmSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedVmSizesResult {
     #[doc = "List of Managed VM Sizes for Service Fabric Managed Clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedVmSize>,
     #[doc = "URL to get the next set of Managed VM Sizes if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1403,16 +1477,36 @@ pub struct NetworkSecurityRule {
     #[doc = "Network protocol this rule applies to."]
     pub protocol: network_security_rule::Protocol,
     #[doc = "The CIDR or source IP ranges."]
-    #[serde(rename = "sourceAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_address_prefixes: Vec<String>,
     #[doc = "The destination address prefixes. CIDR or destination IP ranges."]
-    #[serde(rename = "destinationAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_address_prefixes: Vec<String>,
     #[doc = "The source port ranges."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
     #[doc = "The destination port ranges."]
-    #[serde(rename = "destinationPortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_port_ranges: Vec<String>,
     #[doc = "The CIDR or source IP range. Asterisk '*' can also be used to match all source IPs. Default tags such as 'VirtualNetwork', 'AzureLoadBalancer' and 'Internet' can also be used. If this is an ingress rule, specifies where network traffic originates from."]
     #[serde(rename = "sourceAddressPrefix", default, skip_serializing_if = "Option::is_none")]
@@ -1647,7 +1741,11 @@ impl NodeTypeAvailableSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeTypeListResult {
     #[doc = "The list of node types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeType>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1668,7 +1766,11 @@ impl NodeTypeListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeTypeListSkuResult {
     #[doc = "The list of available node type SKUs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeTypeAvailableSku>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1731,10 +1833,20 @@ pub struct NodeTypeProperties {
     #[serde(rename = "vmImageVersion", default, skip_serializing_if = "Option::is_none")]
     pub vm_image_version: Option<String>,
     #[doc = "The secrets to install in the virtual machines."]
-    #[serde(rename = "vmSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_secrets: Vec<VaultSecretGroup>,
     #[doc = "Set of extensions that should be installed onto the virtual machines."]
-    #[serde(rename = "vmExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_extensions: Vec<VmssExtension>,
     #[doc = "Identities for the virtual machine scale set under the node type."]
     #[serde(rename = "vmManagedIdentity", default, skip_serializing_if = "Option::is_none")]
@@ -1746,13 +1858,28 @@ pub struct NodeTypeProperties {
     #[serde(rename = "multiplePlacementGroups", default, skip_serializing_if = "Option::is_none")]
     pub multiple_placement_groups: Option<bool>,
     #[doc = "Indicates the node type uses its own frontend configurations instead of the default one for the cluster. This setting can only be specified for non-primary node types and can not be added or removed after the node type is created."]
-    #[serde(rename = "frontendConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_configurations: Vec<FrontendConfiguration>,
     #[doc = "The Network Security Rules for this node type. This setting can only be specified for node types that are configured with frontend configurations."]
-    #[serde(rename = "networkSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_rules: Vec<NetworkSecurityRule>,
     #[doc = "Additional managed data disks."]
-    #[serde(rename = "additionalDataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalDataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_data_disks: Vec<VmssDataDisk>,
     #[doc = "Enable or disable the Host Encryption for the virtual machines on the node type. This will enable the encryption for all the disks including Resource/Temp disk at host itself. Default: The Encryption at host will be disabled unless this property is set to true for the resource."]
     #[serde(rename = "enableEncryptionAtHost", default, skip_serializing_if = "Option::is_none")]
@@ -1773,7 +1900,11 @@ pub struct NodeTypeProperties {
     #[serde(rename = "enableOverProvisioning", default, skip_serializing_if = "Option::is_none")]
     pub enable_over_provisioning: Option<bool>,
     #[doc = "Specifies the availability zones where the node type would span across. If the cluster is not spanning across availability zones, initiates az migration for the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Indicates whether the node type will be Spot Virtual Machines. Azure will allocate the VMs if there is capacity available and the VMs can be evicted at any time. "]
     #[serde(rename = "isSpotVM", default, skip_serializing_if = "Option::is_none")]
@@ -1935,7 +2066,11 @@ impl NodeTypeUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Service Fabric resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2385,7 +2520,11 @@ pub struct ServiceEndpoint {
     #[doc = "The type of the endpoint service."]
     pub service: String,
     #[doc = "A list of locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl ServiceEndpoint {
@@ -2661,7 +2800,11 @@ impl ServiceResource {
 #[doc = "The list of service resources."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResource>,
     #[doc = "URL to get the next set of service list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3291,7 +3434,12 @@ pub struct VmssExtensionProperties {
     #[serde(rename = "forceUpdateTag", default, skip_serializing_if = "Option::is_none")]
     pub force_update_tag: Option<String>,
     #[doc = "Collection of extension names after which this extension needs to be provisioned."]
-    #[serde(rename = "provisionAfterExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisionAfterExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provision_after_extensions: Vec<String>,
     #[doc = "The provisioning state, which only appears in the response."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3368,7 +3516,12 @@ impl VaultSecretGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmManagedIdentity {
     #[doc = "The list of user identities associated with the virtual machine scale set under the node type. Each entry will be an ARM resource ids in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ManagedIdentity/userAssignedIdentities/{identityName}'."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<String>,
 }
 impl VmManagedIdentity {
diff --git a/services/mgmt/servicefabricmanagedclusters/src/package_2022_06_preview/models.rs b/services/mgmt/servicefabricmanagedclusters/src/package_2022_06_preview/models.rs
index e89556c766..d7dce39943 100644
--- a/services/mgmt/servicefabricmanagedclusters/src/package_2022_06_preview/models.rs
+++ b/services/mgmt/servicefabricmanagedclusters/src/package_2022_06_preview/models.rs
@@ -82,7 +82,11 @@ impl ApplicationResource {
 #[doc = "The list of application resources."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationResource>,
     #[doc = "URL to get the next set of application list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -115,7 +119,12 @@ pub struct ApplicationResourceProperties {
     #[serde(rename = "upgradePolicy", default, skip_serializing_if = "Option::is_none")]
     pub upgrade_policy: Option<ApplicationUpgradePolicy>,
     #[doc = "List of user assigned identities for the application, each mapped to a friendly name."]
-    #[serde(rename = "managedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_identities: Vec<ApplicationUserAssignedIdentity>,
 }
 impl ApplicationResourceProperties {
@@ -140,7 +149,11 @@ impl ApplicationTypeResource {
 #[doc = "The list of application type names."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationTypeResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationTypeResource>,
     #[doc = "URL to get the next set of application type list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -199,7 +212,11 @@ impl ApplicationTypeVersionResource {
 #[doc = "The list of application type version resources for the specified application type name resource."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationTypeVersionResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationTypeVersionResource>,
     #[doc = "URL to get the next set of application type version list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -954,7 +971,12 @@ impl LongRunningOperationResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedAzResiliencyStatus {
     #[doc = "List of Managed VM Sizes for Service Fabric Managed Clusters."]
-    #[serde(rename = "baseResourceStatus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "baseResourceStatus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub base_resource_status: Vec<ResourceAzStatus>,
     #[doc = "URL to get the next set of Managed VM Sizes if there are any."]
     #[serde(rename = "isClusterZoneResilient", default, skip_serializing_if = "Option::is_none")]
@@ -1050,7 +1072,11 @@ impl ManagedClusterCodeVersionResult {
 #[doc = "Managed Cluster list results"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedCluster>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1086,7 +1112,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "clusterState", default, skip_serializing_if = "Option::is_none")]
     pub cluster_state: Option<ClusterState>,
     #[doc = "List of thumbprints of the cluster certificates."]
-    #[serde(rename = "clusterCertificateThumbprints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterCertificateThumbprints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_certificate_thumbprints: Vec<String>,
     #[doc = "The port used for client connections to the cluster."]
     #[serde(rename = "clientConnectionPort", default, skip_serializing_if = "Option::is_none")]
@@ -1101,22 +1132,41 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "adminPassword", default, skip_serializing_if = "Option::is_none")]
     pub admin_password: Option<String>,
     #[doc = "Load balancing rules that are applied to the public load balancer of the cluster."]
-    #[serde(rename = "loadBalancingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_rules: Vec<LoadBalancingRule>,
     #[doc = "Setting this to true enables RDP access to the VM. The default NSG rule opens RDP port to Internet which can be overridden with custom Network Security Rules. The default value for this setting is false."]
     #[serde(rename = "allowRdpAccess", default, skip_serializing_if = "Option::is_none")]
     pub allow_rdp_access: Option<bool>,
     #[doc = "Custom Network Security Rules that are applied to the Virtual Network of the cluster."]
-    #[serde(rename = "networkSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_rules: Vec<NetworkSecurityRule>,
     #[doc = "Client certificates that are allowed to manage the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clients: Vec<ClientCertificate>,
     #[doc = "The settings to enable AAD authentication on the cluster."]
     #[serde(rename = "azureActiveDirectory", default, skip_serializing_if = "Option::is_none")]
     pub azure_active_directory: Option<AzureActiveDirectory>,
     #[doc = "The list of custom fabric settings to configure the cluster."]
-    #[serde(rename = "fabricSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fabricSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fabric_settings: Vec<SettingsSectionDescription>,
     #[doc = "The provisioning state of the managed resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1131,7 +1181,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "clusterUpgradeCadence", default, skip_serializing_if = "Option::is_none")]
     pub cluster_upgrade_cadence: Option<ClusterUpgradeCadence>,
     #[doc = "List of add-on features to enable on the cluster."]
-    #[serde(rename = "addonFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addonFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub addon_features: Vec<ManagedClusterAddOnFeature>,
     #[doc = "Setting this to true enables automatic OS upgrade for the node types that are created using any platform OS image with version 'latest'. The default value for this setting is false."]
     #[serde(rename = "enableAutoOSUpgrade", default, skip_serializing_if = "Option::is_none")]
@@ -1149,7 +1204,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "subnetId", default, skip_serializing_if = "Option::is_none")]
     pub subnet_id: Option<String>,
     #[doc = "The list of IP tags associated with the default public IP address of the cluster."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<IpTag>,
     #[doc = "IPv6 address for the cluster if IPv6 is enabled."]
     #[serde(rename = "ipv6Address", default, skip_serializing_if = "Option::is_none")]
@@ -1158,10 +1218,20 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "enableServicePublicIP", default, skip_serializing_if = "Option::is_none")]
     pub enable_service_public_ip: Option<bool>,
     #[doc = "Auxiliary subnets for the cluster."]
-    #[serde(rename = "auxiliarySubnets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auxiliarySubnets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auxiliary_subnets: Vec<Subnet>,
     #[doc = "Service endpoints for subnets in the cluster."]
-    #[serde(rename = "serviceEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_endpoints: Vec<ServiceEndpoint>,
 }
 impl ManagedClusterProperties {
@@ -1363,7 +1433,11 @@ impl ManagedVmSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedVmSizesResult {
     #[doc = "List of Managed VM Sizes for Service Fabric Managed Clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedVmSize>,
     #[doc = "URL to get the next set of Managed VM Sizes if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1445,16 +1519,36 @@ pub struct NetworkSecurityRule {
     #[doc = "Network protocol this rule applies to."]
     pub protocol: network_security_rule::Protocol,
     #[doc = "The CIDR or source IP ranges."]
-    #[serde(rename = "sourceAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_address_prefixes: Vec<String>,
     #[doc = "The destination address prefixes. CIDR or destination IP ranges."]
-    #[serde(rename = "destinationAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_address_prefixes: Vec<String>,
     #[doc = "The source port ranges."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
     #[doc = "The destination port ranges."]
-    #[serde(rename = "destinationPortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_port_ranges: Vec<String>,
     #[doc = "The CIDR or source IP range. Asterisk '*' can also be used to match all source IPs. Default tags such as 'VirtualNetwork', 'AzureLoadBalancer' and 'Internet' can also be used. If this is an ingress rule, specifies where network traffic originates from."]
     #[serde(rename = "sourceAddressPrefix", default, skip_serializing_if = "Option::is_none")]
@@ -1689,7 +1783,11 @@ impl NodeTypeAvailableSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeTypeListResult {
     #[doc = "The list of node types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeType>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1710,7 +1808,11 @@ impl NodeTypeListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeTypeListSkuResult {
     #[doc = "The list of available node type SKUs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeTypeAvailableSku>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1773,10 +1875,20 @@ pub struct NodeTypeProperties {
     #[serde(rename = "vmImageVersion", default, skip_serializing_if = "Option::is_none")]
     pub vm_image_version: Option<String>,
     #[doc = "The secrets to install in the virtual machines."]
-    #[serde(rename = "vmSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_secrets: Vec<VaultSecretGroup>,
     #[doc = "Set of extensions that should be installed onto the virtual machines."]
-    #[serde(rename = "vmExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_extensions: Vec<VmssExtension>,
     #[doc = "Identities for the virtual machine scale set under the node type."]
     #[serde(rename = "vmManagedIdentity", default, skip_serializing_if = "Option::is_none")]
@@ -1788,13 +1900,28 @@ pub struct NodeTypeProperties {
     #[serde(rename = "multiplePlacementGroups", default, skip_serializing_if = "Option::is_none")]
     pub multiple_placement_groups: Option<bool>,
     #[doc = "Indicates the node type uses its own frontend configurations instead of the default one for the cluster. This setting can only be specified for non-primary node types and can not be added or removed after the node type is created."]
-    #[serde(rename = "frontendConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_configurations: Vec<FrontendConfiguration>,
     #[doc = "The Network Security Rules for this node type. This setting can only be specified for node types that are configured with frontend configurations."]
-    #[serde(rename = "networkSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_rules: Vec<NetworkSecurityRule>,
     #[doc = "Additional managed data disks."]
-    #[serde(rename = "additionalDataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalDataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_data_disks: Vec<VmssDataDisk>,
     #[doc = "Enable or disable the Host Encryption for the virtual machines on the node type. This will enable the encryption for all the disks including Resource/Temp disk at host itself. Default: The Encryption at host will be disabled unless this property is set to true for the resource."]
     #[serde(rename = "enableEncryptionAtHost", default, skip_serializing_if = "Option::is_none")]
@@ -1815,7 +1942,11 @@ pub struct NodeTypeProperties {
     #[serde(rename = "enableOverProvisioning", default, skip_serializing_if = "Option::is_none")]
     pub enable_over_provisioning: Option<bool>,
     #[doc = "Specifies the availability zones where the node type would span across. If the cluster is not spanning across availability zones, initiates az migration for the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Indicates whether the node type will be Spot Virtual Machines. Azure will allocate the VMs if there is capacity available and the VMs can be evicted at any time."]
     #[serde(rename = "isSpotVM", default, skip_serializing_if = "Option::is_none")]
@@ -1993,7 +2124,11 @@ impl NodeTypeUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Service Fabric resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2443,7 +2578,11 @@ pub struct ServiceEndpoint {
     #[doc = "The type of the endpoint service."]
     pub service: String,
     #[doc = "A list of locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl ServiceEndpoint {
@@ -2719,7 +2858,11 @@ impl ServiceResource {
 #[doc = "The list of service resources."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResource>,
     #[doc = "URL to get the next set of service list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3349,7 +3492,12 @@ pub struct VmssExtensionProperties {
     #[serde(rename = "forceUpdateTag", default, skip_serializing_if = "Option::is_none")]
     pub force_update_tag: Option<String>,
     #[doc = "Collection of extension names after which this extension needs to be provisioned."]
-    #[serde(rename = "provisionAfterExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisionAfterExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provision_after_extensions: Vec<String>,
     #[doc = "The provisioning state, which only appears in the response."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3426,7 +3574,12 @@ impl VaultSecretGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmManagedIdentity {
     #[doc = "The list of user identities associated with the virtual machine scale set under the node type. Each entry will be an ARM resource ids in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ManagedIdentity/userAssignedIdentities/{identityName}'."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<String>,
 }
 impl VmManagedIdentity {
diff --git a/services/mgmt/servicefabricmanagedclusters/src/package_2022_08_preview/models.rs b/services/mgmt/servicefabricmanagedclusters/src/package_2022_08_preview/models.rs
index 2922f4163a..d9e2bf844e 100644
--- a/services/mgmt/servicefabricmanagedclusters/src/package_2022_08_preview/models.rs
+++ b/services/mgmt/servicefabricmanagedclusters/src/package_2022_08_preview/models.rs
@@ -82,7 +82,11 @@ impl ApplicationResource {
 #[doc = "The list of application resources."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationResource>,
     #[doc = "URL to get the next set of application list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -115,7 +119,12 @@ pub struct ApplicationResourceProperties {
     #[serde(rename = "upgradePolicy", default, skip_serializing_if = "Option::is_none")]
     pub upgrade_policy: Option<ApplicationUpgradePolicy>,
     #[doc = "List of user assigned identities for the application, each mapped to a friendly name."]
-    #[serde(rename = "managedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "managedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub managed_identities: Vec<ApplicationUserAssignedIdentity>,
 }
 impl ApplicationResourceProperties {
@@ -140,7 +149,11 @@ impl ApplicationTypeResource {
 #[doc = "The list of application type names."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationTypeResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationTypeResource>,
     #[doc = "URL to get the next set of application type list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -199,7 +212,11 @@ impl ApplicationTypeVersionResource {
 #[doc = "The list of application type version resources for the specified application type name resource."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationTypeVersionResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationTypeVersionResource>,
     #[doc = "URL to get the next set of application type version list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -961,7 +978,12 @@ impl LongRunningOperationResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedAzResiliencyStatus {
     #[doc = "List of Managed VM Sizes for Service Fabric Managed Clusters."]
-    #[serde(rename = "baseResourceStatus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "baseResourceStatus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub base_resource_status: Vec<ResourceAzStatus>,
     #[doc = "URL to get the next set of Managed VM Sizes if there are any."]
     #[serde(rename = "isClusterZoneResilient", default, skip_serializing_if = "Option::is_none")]
@@ -1057,7 +1079,11 @@ impl ManagedClusterCodeVersionResult {
 #[doc = "Managed Cluster list results"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedClusterListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedCluster>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1093,7 +1119,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "clusterState", default, skip_serializing_if = "Option::is_none")]
     pub cluster_state: Option<ClusterState>,
     #[doc = "List of thumbprints of the cluster certificates."]
-    #[serde(rename = "clusterCertificateThumbprints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterCertificateThumbprints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_certificate_thumbprints: Vec<String>,
     #[doc = "The port used for client connections to the cluster."]
     #[serde(rename = "clientConnectionPort", default, skip_serializing_if = "Option::is_none")]
@@ -1108,22 +1139,41 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "adminPassword", default, skip_serializing_if = "Option::is_none")]
     pub admin_password: Option<String>,
     #[doc = "Load balancing rules that are applied to the public load balancer of the cluster."]
-    #[serde(rename = "loadBalancingRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancingRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancing_rules: Vec<LoadBalancingRule>,
     #[doc = "Setting this to true enables RDP access to the VM. The default NSG rule opens RDP port to Internet which can be overridden with custom Network Security Rules. The default value for this setting is false."]
     #[serde(rename = "allowRdpAccess", default, skip_serializing_if = "Option::is_none")]
     pub allow_rdp_access: Option<bool>,
     #[doc = "Custom Network Security Rules that are applied to the Virtual Network of the cluster."]
-    #[serde(rename = "networkSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_rules: Vec<NetworkSecurityRule>,
     #[doc = "Client certificates that are allowed to manage the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clients: Vec<ClientCertificate>,
     #[doc = "The settings to enable AAD authentication on the cluster."]
     #[serde(rename = "azureActiveDirectory", default, skip_serializing_if = "Option::is_none")]
     pub azure_active_directory: Option<AzureActiveDirectory>,
     #[doc = "The list of custom fabric settings to configure the cluster."]
-    #[serde(rename = "fabricSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fabricSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fabric_settings: Vec<SettingsSectionDescription>,
     #[doc = "The provisioning state of the managed resource."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -1138,7 +1188,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "clusterUpgradeCadence", default, skip_serializing_if = "Option::is_none")]
     pub cluster_upgrade_cadence: Option<ClusterUpgradeCadence>,
     #[doc = "List of add-on features to enable on the cluster."]
-    #[serde(rename = "addonFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "addonFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub addon_features: Vec<ManagedClusterAddOnFeature>,
     #[doc = "Setting this to true enables automatic OS upgrade for the node types that are created using any platform OS image with version 'latest'. The default value for this setting is false."]
     #[serde(rename = "enableAutoOSUpgrade", default, skip_serializing_if = "Option::is_none")]
@@ -1156,7 +1211,12 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "subnetId", default, skip_serializing_if = "Option::is_none")]
     pub subnet_id: Option<String>,
     #[doc = "The list of IP tags associated with the default public IP address of the cluster."]
-    #[serde(rename = "ipTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_tags: Vec<IpTag>,
     #[doc = "IPv6 address for the cluster if IPv6 is enabled."]
     #[serde(rename = "ipv6Address", default, skip_serializing_if = "Option::is_none")]
@@ -1165,10 +1225,20 @@ pub struct ManagedClusterProperties {
     #[serde(rename = "enableServicePublicIP", default, skip_serializing_if = "Option::is_none")]
     pub enable_service_public_ip: Option<bool>,
     #[doc = "Auxiliary subnets for the cluster."]
-    #[serde(rename = "auxiliarySubnets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auxiliarySubnets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auxiliary_subnets: Vec<Subnet>,
     #[doc = "Service endpoints for subnets in the cluster."]
-    #[serde(rename = "serviceEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_endpoints: Vec<ServiceEndpoint>,
 }
 impl ManagedClusterProperties {
@@ -1370,7 +1440,11 @@ impl ManagedVmSize {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedVmSizesResult {
     #[doc = "List of Managed VM Sizes for Service Fabric Managed Clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedVmSize>,
     #[doc = "URL to get the next set of Managed VM Sizes if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1452,16 +1526,36 @@ pub struct NetworkSecurityRule {
     #[doc = "Network protocol this rule applies to."]
     pub protocol: network_security_rule::Protocol,
     #[doc = "The CIDR or source IP ranges."]
-    #[serde(rename = "sourceAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourceAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_address_prefixes: Vec<String>,
     #[doc = "The destination address prefixes. CIDR or destination IP ranges."]
-    #[serde(rename = "destinationAddressPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationAddressPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_address_prefixes: Vec<String>,
     #[doc = "The source port ranges."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
     #[doc = "The destination port ranges."]
-    #[serde(rename = "destinationPortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "destinationPortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub destination_port_ranges: Vec<String>,
     #[doc = "The CIDR or source IP range. Asterisk '*' can also be used to match all source IPs. Default tags such as 'VirtualNetwork', 'AzureLoadBalancer' and 'Internet' can also be used. If this is an ingress rule, specifies where network traffic originates from."]
     #[serde(rename = "sourceAddressPrefix", default, skip_serializing_if = "Option::is_none")]
@@ -1696,7 +1790,11 @@ impl NodeTypeAvailableSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeTypeListResult {
     #[doc = "The list of node types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeType>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1717,7 +1815,11 @@ impl NodeTypeListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeTypeListSkuResult {
     #[doc = "The list of available node type SKUs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeTypeAvailableSku>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1780,10 +1882,20 @@ pub struct NodeTypeProperties {
     #[serde(rename = "vmImageVersion", default, skip_serializing_if = "Option::is_none")]
     pub vm_image_version: Option<String>,
     #[doc = "The secrets to install in the virtual machines."]
-    #[serde(rename = "vmSecrets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmSecrets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_secrets: Vec<VaultSecretGroup>,
     #[doc = "Set of extensions that should be installed onto the virtual machines."]
-    #[serde(rename = "vmExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_extensions: Vec<VmssExtension>,
     #[doc = "Identities for the virtual machine scale set under the node type."]
     #[serde(rename = "vmManagedIdentity", default, skip_serializing_if = "Option::is_none")]
@@ -1795,13 +1907,28 @@ pub struct NodeTypeProperties {
     #[serde(rename = "multiplePlacementGroups", default, skip_serializing_if = "Option::is_none")]
     pub multiple_placement_groups: Option<bool>,
     #[doc = "Indicates the node type uses its own frontend configurations instead of the default one for the cluster. This setting can only be specified for non-primary node types and can not be added or removed after the node type is created."]
-    #[serde(rename = "frontendConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "frontendConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frontend_configurations: Vec<FrontendConfiguration>,
     #[doc = "The Network Security Rules for this node type. This setting can only be specified for node types that are configured with frontend configurations."]
-    #[serde(rename = "networkSecurityRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_rules: Vec<NetworkSecurityRule>,
     #[doc = "Additional managed data disks."]
-    #[serde(rename = "additionalDataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalDataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_data_disks: Vec<VmssDataDisk>,
     #[doc = "Enable or disable the Host Encryption for the virtual machines on the node type. This will enable the encryption for all the disks including Resource/Temp disk at host itself. Default: The Encryption at host will be disabled unless this property is set to true for the resource."]
     #[serde(rename = "enableEncryptionAtHost", default, skip_serializing_if = "Option::is_none")]
@@ -1822,7 +1949,11 @@ pub struct NodeTypeProperties {
     #[serde(rename = "enableOverProvisioning", default, skip_serializing_if = "Option::is_none")]
     pub enable_over_provisioning: Option<bool>,
     #[doc = "Specifies the availability zones where the node type would span across. If the cluster is not spanning across availability zones, initiates az migration for the cluster."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "Indicates whether the node type will be Spot Virtual Machines. Azure will allocate the VMs if there is capacity available and the VMs can be evicted at any time."]
     #[serde(rename = "isSpotVM", default, skip_serializing_if = "Option::is_none")]
@@ -2004,7 +2135,11 @@ impl NodeTypeUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Service Fabric resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2454,7 +2589,11 @@ pub struct ServiceEndpoint {
     #[doc = "The type of the endpoint service."]
     pub service: String,
     #[doc = "A list of locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl ServiceEndpoint {
@@ -2730,7 +2869,11 @@ impl ServiceResource {
 #[doc = "The list of service resources."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceResourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResource>,
     #[doc = "URL to get the next set of service list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3360,7 +3503,12 @@ pub struct VmssExtensionProperties {
     #[serde(rename = "forceUpdateTag", default, skip_serializing_if = "Option::is_none")]
     pub force_update_tag: Option<String>,
     #[doc = "Collection of extension names after which this extension needs to be provisioned."]
-    #[serde(rename = "provisionAfterExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisionAfterExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provision_after_extensions: Vec<String>,
     #[doc = "The provisioning state, which only appears in the response."]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3437,7 +3585,12 @@ impl VaultSecretGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VmManagedIdentity {
     #[doc = "The list of user identities associated with the virtual machine scale set under the node type. Each entry will be an ARM resource ids in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ManagedIdentity/userAssignedIdentities/{identityName}'."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<String>,
 }
 impl VmManagedIdentity {
diff --git a/services/mgmt/servicefabricmesh/src/package_2018_07_01_preview/models.rs b/services/mgmt/servicefabricmesh/src/package_2018_07_01_preview/models.rs
index b042bb8128..48c3b494a5 100644
--- a/services/mgmt/servicefabricmesh/src/package_2018_07_01_preview/models.rs
+++ b/services/mgmt/servicefabricmesh/src/package_2018_07_01_preview/models.rs
@@ -13,7 +13,11 @@ pub struct ApplicationProperties {
     #[serde(rename = "debugParams", default, skip_serializing_if = "Option::is_none")]
     pub debug_params: Option<String>,
     #[doc = "describes the services in the application."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub services: Vec<ServiceResourceDescription>,
     #[doc = "The health state of a resource such as Application, Service, or Network."]
     #[serde(rename = "healthState", default, skip_serializing_if = "Option::is_none")]
@@ -28,7 +32,12 @@ pub struct ApplicationProperties {
     #[serde(rename = "statusDetails", default, skip_serializing_if = "Option::is_none")]
     pub status_details: Option<String>,
     #[doc = "Names of the services in the application."]
-    #[serde(rename = "serviceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_names: Vec<String>,
     #[doc = "Describes the diagnostics options available"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -107,7 +116,11 @@ impl ApplicationResourceDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationResourceDescriptionList {
     #[doc = "One page of the list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationResourceDescription>,
     #[doc = "URI to fetch the next page of the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -205,24 +218,50 @@ pub struct ContainerCodePackageProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub entrypoint: Option<String>,
     #[doc = "Command array to execute within the container in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub commands: Vec<String>,
     #[doc = "The environment variables to set in this container"]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The settings to set in this container. The setting file path can be fetched from environment variable \"Fabric_SettingPath\". The path for Windows container is \"C:\\\\secrets\". The path for Linux container is \"/var/secrets\"."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub settings: Vec<Setting>,
     #[doc = "The labels to set in this container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<ContainerLabel>,
     #[doc = "The endpoints exposed by this container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointProperties>,
     #[doc = "This type describes the resource requirements for a container or a service."]
     pub resources: ResourceRequirements,
     #[doc = "The volumes to be attached to the container."]
-    #[serde(rename = "volumeRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_refs: Vec<ContainerVolume>,
     #[doc = "Runtime information of a container instance."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
@@ -290,7 +329,11 @@ pub struct ContainerInstanceView {
     #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
     pub previous_state: Option<ContainerState>,
     #[doc = "The events of this container instance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<ContainerEvent>,
 }
 impl ContainerInstanceView {
@@ -372,13 +415,22 @@ impl ContainerVolume {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticsDescription {
     #[doc = "List of supported sinks that can be referenced."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sinks: Vec<DiagnosticsSinkProperties>,
     #[doc = "Status of whether or not sinks are enabled."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "The sinks to be used if diagnostics is enabled. Sink choices can be overridden at the service and code package level."]
-    #[serde(rename = "defaultSinkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultSinkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_sink_refs: Vec<String>,
 }
 impl DiagnosticsDescription {
@@ -393,7 +445,12 @@ pub struct DiagnosticsRef {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "List of sinks to be used if enabled. References the list of sinks in DiagnosticsDescription."]
-    #[serde(rename = "sinkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sinkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sink_refs: Vec<String>,
 }
 impl DiagnosticsRef {
@@ -512,7 +569,11 @@ pub struct ErrorErrorModel {
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
     pub inner_error: Option<String>,
     #[doc = "List of error message details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetailsModel>,
 }
 impl ErrorErrorModel {
@@ -612,7 +673,11 @@ pub struct IngressConfig {
     #[serde(rename = "qosLevel", default, skip_serializing_if = "Option::is_none")]
     pub qos_level: Option<ingress_config::QosLevel>,
     #[doc = "Configuration for layer4 public connectivity for this network."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layer4: Vec<Layer4IngressConfig>,
     #[doc = "The public IP address for reaching this network."]
     #[serde(rename = "publicIPAddress", default, skip_serializing_if = "Option::is_none")]
@@ -757,7 +822,11 @@ impl NetworkResourceDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkResourceDescriptionList {
     #[doc = "One page of the list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkResourceDescription>,
     #[doc = "URI to fetch the next page of the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -794,7 +863,11 @@ impl NetworkResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Service Fabric operations supported by the Microsoft.ServiceFabric resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -923,7 +996,11 @@ impl ResourceRequirements {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceList {
     #[doc = "One page of the list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResourceDescription>,
     #[doc = "URI to fetch the next page of the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -961,7 +1038,11 @@ impl ServiceReplicaDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceReplicaList {
     #[doc = "One page of the list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceReplicaDescription>,
     #[doc = "URI to fetch the next page of the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -988,7 +1069,12 @@ pub struct ServiceReplicaProperties {
     #[serde(rename = "codePackages")]
     pub code_packages: Vec<ContainerCodePackageProperties>,
     #[doc = "The names of the private networks that this service needs to be part of."]
-    #[serde(rename = "networkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_refs: Vec<NetworkRef>,
     #[doc = "Reference to sinks in DiagnosticsDescription."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1274,7 +1360,11 @@ impl VolumeResourceDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VolumeResourceDescriptionList {
     #[doc = "One page of the list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VolumeResourceDescription>,
     #[doc = "URI to fetch the next page of the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/servicefabricmesh/src/package_2018_09_01_preview/models.rs b/services/mgmt/servicefabricmesh/src/package_2018_09_01_preview/models.rs
index f2655fa07e..19c5bd8a96 100644
--- a/services/mgmt/servicefabricmesh/src/package_2018_09_01_preview/models.rs
+++ b/services/mgmt/servicefabricmesh/src/package_2018_09_01_preview/models.rs
@@ -35,7 +35,11 @@ pub struct ApplicationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Describes the services in the application. This property is used to create or modify services of the application. On get only the name of the service is returned. The service description can be obtained by querying for the service resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub services: Vec<ServiceResourceDescription>,
     #[doc = "Describes the diagnostics options available"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -44,7 +48,12 @@ pub struct ApplicationProperties {
     #[serde(rename = "debugParams", default, skip_serializing_if = "Option::is_none")]
     pub debug_params: Option<String>,
     #[doc = "Names of the services in the application."]
-    #[serde(rename = "serviceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_names: Vec<String>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -84,7 +93,11 @@ impl ApplicationResourceDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationResourceDescriptionList {
     #[doc = "One page of the list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationResourceDescription>,
     #[doc = "URI to fetch the next page of the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -551,33 +564,68 @@ pub struct ContainerCodePackageProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub entrypoint: Option<String>,
     #[doc = "Command array to execute within the container in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub commands: Vec<String>,
     #[doc = "The environment variables to set in this container"]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The settings to set in this container. The setting file path can be fetched from environment variable \"Fabric_SettingPath\". The path for Windows container is \"C:\\\\secrets\". The path for Linux container is \"/var/secrets\"."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub settings: Vec<Setting>,
     #[doc = "The labels to set in this container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<ContainerLabel>,
     #[doc = "The endpoints exposed by this container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointProperties>,
     #[doc = "This type describes the resource requirements for a container or a service."]
     pub resources: ResourceRequirements,
     #[doc = "Volumes to be attached to the container. The lifetime of these volumes is independent of the application's lifetime."]
-    #[serde(rename = "volumeRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_refs: Vec<VolumeReference>,
     #[doc = "Volumes to be attached to the container. The lifetime of these volumes is scoped to the application's lifetime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volumes: Vec<ApplicationScopedVolume>,
     #[doc = "Reference to sinks in DiagnosticsDescription."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub diagnostics: Option<DiagnosticsRef>,
     #[doc = "A list of ReliableCollection resources used by this particular code package. Please refer to ReliableCollectionsRef for more details."]
-    #[serde(rename = "reliableCollectionsRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reliableCollectionsRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reliable_collections_refs: Vec<ReliableCollectionsRef>,
     #[doc = "Runtime information of a container instance."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
@@ -644,7 +692,11 @@ pub struct ContainerInstanceView {
     #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
     pub previous_state: Option<ContainerState>,
     #[doc = "The events of this container instance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<ContainerEvent>,
 }
 impl ContainerInstanceView {
@@ -705,13 +757,22 @@ impl ContainerState {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticsDescription {
     #[doc = "List of supported sinks that can be referenced."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sinks: Vec<DiagnosticsSinkProperties>,
     #[doc = "Status of whether or not sinks are enabled."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "The sinks to be used if diagnostics is enabled. Sink choices can be overridden at the service and code package level."]
-    #[serde(rename = "defaultSinkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultSinkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_sink_refs: Vec<String>,
 }
 impl DiagnosticsDescription {
@@ -726,7 +787,12 @@ pub struct DiagnosticsRef {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "List of sinks to be used if enabled. References the list of sinks in DiagnosticsDescription."]
-    #[serde(rename = "sinkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sinkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sink_refs: Vec<String>,
 }
 impl DiagnosticsRef {
@@ -857,7 +923,11 @@ pub struct ErrorErrorModel {
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
     pub inner_error: Option<String>,
     #[doc = "List of error message details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetailsModel>,
 }
 impl ErrorErrorModel {
@@ -922,10 +992,18 @@ pub struct GatewayProperties {
     #[serde(rename = "destinationNetwork")]
     pub destination_network: NetworkRef,
     #[doc = "Configuration for tcp connectivity for this gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tcp: Vec<TcpConfig>,
     #[doc = "Configuration for http connectivity for this gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http: Vec<HttpConfig>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -971,7 +1049,11 @@ impl GatewayResourceDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GatewayResourceDescriptionList {
     #[doc = "One page of the list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GatewayResourceDescription>,
     #[doc = "URI to fetch the next page of the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1217,7 +1299,11 @@ pub struct HttpRouteMatchRule {
     #[doc = "Path to match for routing."]
     pub path: HttpRouteMatchPath,
     #[doc = "headers and their values to match in request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<HttpRouteMatchHeader>,
 }
 impl HttpRouteMatchRule {
@@ -1336,7 +1422,12 @@ pub struct NetworkRef {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of endpoints that are exposed on this network."]
-    #[serde(rename = "endpointRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_refs: Vec<EndpointRef>,
 }
 impl NetworkRef {
@@ -1364,7 +1455,11 @@ impl NetworkResourceDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkResourceDescriptionList {
     #[doc = "One page of the list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NetworkResourceDescription>,
     #[doc = "URI to fetch the next page of the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1463,7 +1558,11 @@ impl Serialize for OperatingSystemType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Service Fabric operations supported by the Microsoft.ServiceFabric resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResult>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1703,7 +1802,11 @@ impl SecretResourceDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecretResourceDescriptionList {
     #[doc = "One page of the list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SecretResourceDescription>,
     #[doc = "URI to fetch the next page of the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1809,7 +1912,11 @@ impl SecretValueResourceDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecretValueResourceDescriptionList {
     #[doc = "One page of the list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SecretValueResourceDescription>,
     #[doc = "URI to fetch the next page of the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1849,7 +1956,12 @@ pub struct ServiceProperties {
     #[serde(rename = "replicaCount", default, skip_serializing_if = "Option::is_none")]
     pub replica_count: Option<i64>,
     #[doc = "Auto scaling policies"]
-    #[serde(rename = "autoScalingPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "autoScalingPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auto_scaling_policies: Vec<AutoScalingPolicy>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1890,7 +2002,11 @@ impl ServiceReplicaDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceReplicaDescriptionList {
     #[doc = "One page of the list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceReplicaDescription>,
     #[doc = "URI to fetch the next page of the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1917,7 +2033,12 @@ pub struct ServiceReplicaProperties {
     #[serde(rename = "codePackages")]
     pub code_packages: Vec<ContainerCodePackageProperties>,
     #[doc = "The names of the private networks that this service needs to be part of."]
-    #[serde(rename = "networkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_refs: Vec<NetworkRef>,
     #[doc = "Reference to sinks in DiagnosticsDescription."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1953,7 +2074,11 @@ impl ServiceResourceDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceResourceDescriptionList {
     #[doc = "One page of the list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServiceResourceDescription>,
     #[doc = "URI to fetch the next page of the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2167,7 +2292,11 @@ impl VolumeResourceDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VolumeResourceDescriptionList {
     #[doc = "One page of the list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VolumeResourceDescription>,
     #[doc = "URI to fetch the next page of the list."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/servicelinker/src/package_2021_11_01_preview/models.rs b/services/mgmt/servicelinker/src/package_2021_11_01_preview/models.rs
index c75b017a2d..bdac0957b5 100644
--- a/services/mgmt/servicelinker/src/package_2021_11_01_preview/models.rs
+++ b/services/mgmt/servicelinker/src/package_2021_11_01_preview/models.rs
@@ -91,10 +91,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -127,7 +136,11 @@ pub struct LinkerList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Linkers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkerResource>,
 }
 impl azure_core::Continuable for LinkerList {
@@ -395,7 +408,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -541,7 +558,11 @@ impl SourceConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceConfigurationResult {
     #[doc = "The configuration properties for source resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configurations: Vec<SourceConfiguration>,
 }
 impl SourceConfigurationResult {
diff --git a/services/mgmt/servicelinker/src/package_2022_01_01_preview/models.rs b/services/mgmt/servicelinker/src/package_2022_01_01_preview/models.rs
index 50c29defbe..8608b20654 100644
--- a/services/mgmt/servicelinker/src/package_2022_01_01_preview/models.rs
+++ b/services/mgmt/servicelinker/src/package_2022_01_01_preview/models.rs
@@ -210,10 +210,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -284,7 +293,11 @@ pub struct LinkerList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Linkers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkerResource>,
 }
 impl azure_core::Continuable for LinkerList {
@@ -555,7 +568,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -755,7 +772,11 @@ impl SourceConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceConfigurationResult {
     #[doc = "The configuration properties for source resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configurations: Vec<SourceConfiguration>,
 }
 impl SourceConfigurationResult {
@@ -925,7 +946,12 @@ pub struct ValidateResult {
     #[serde(rename = "authType", default, skip_serializing_if = "Option::is_none")]
     pub auth_type: Option<AuthType>,
     #[doc = "The detail of validation result"]
-    #[serde(rename = "validationDetail", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationDetail",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_detail: Vec<ValidationResultItem>,
 }
 impl ValidateResult {
diff --git a/services/mgmt/servicelinker/src/package_2022_05_01/models.rs b/services/mgmt/servicelinker/src/package_2022_05_01/models.rs
index 49004a3f9b..d9907d69d9 100644
--- a/services/mgmt/servicelinker/src/package_2022_05_01/models.rs
+++ b/services/mgmt/servicelinker/src/package_2022_05_01/models.rs
@@ -210,10 +210,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -284,7 +293,11 @@ pub struct LinkerList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Linkers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkerResource>,
 }
 impl azure_core::Continuable for LinkerList {
@@ -558,7 +571,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -758,7 +775,11 @@ impl SourceConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SourceConfigurationResult {
     #[doc = "The configuration properties for source resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub configurations: Vec<SourceConfiguration>,
 }
 impl SourceConfigurationResult {
@@ -946,7 +967,12 @@ pub struct ValidateResult {
     #[serde(rename = "authType", default, skip_serializing_if = "Option::is_none")]
     pub auth_type: Option<AuthType>,
     #[doc = "The detail of validation result"]
-    #[serde(rename = "validationDetail", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationDetail",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_detail: Vec<ValidationResultItem>,
 }
 impl ValidateResult {
diff --git a/services/mgmt/servicemap/src/package_2015_11_preview/models.rs b/services/mgmt/servicemap/src/package_2015_11_preview/models.rs
index b699d4e2ee..eaa5e23354 100644
--- a/services/mgmt/servicemap/src/package_2015_11_preview/models.rs
+++ b/services/mgmt/servicemap/src/package_2015_11_preview/models.rs
@@ -307,7 +307,11 @@ pub mod client_group_member {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub port: Option<PortReference>,
         #[doc = "Processes accepting on the above port that received connections from this client."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub processes: Vec<ProcessReference>,
     }
     impl Properties {
@@ -320,7 +324,11 @@ pub mod client_group_member {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClientGroupMembersCollection {
     #[doc = "Collection of ClientGroupMember resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClientGroupMember>,
     #[doc = "The URL to the next set of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -397,7 +405,11 @@ impl Connection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ConnectionCollection {
     #[doc = "Collection of Connection resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Connection>,
     #[doc = "The URL to the next set of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -715,7 +727,11 @@ pub mod machine {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MachineCollection {
     #[doc = "Collection of Machine resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Machine>,
     #[doc = "The URL to the next set of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -781,7 +797,11 @@ pub mod machine_group {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub count: Option<i32>,
         #[doc = "References of the machines in this group. The hints within each reference do not represent the current value of the corresponding fields. They are a snapshot created during the last time the machine group was updated."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub machines: Vec<MachineReferenceWithHints>,
     }
     impl Properties {
@@ -850,7 +870,11 @@ pub mod machine_group {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MachineGroupCollection {
     #[doc = "Collection of Machine Group resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MachineGroup>,
     #[doc = "The URL to the next set of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1031,10 +1055,18 @@ impl Map {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MapEdges {
     #[doc = "Network connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connections: Vec<Connection>,
     #[doc = "Processes accepting on a port."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub acceptors: Vec<Acceptor>,
 }
 impl MapEdges {
@@ -1046,16 +1078,33 @@ impl MapEdges {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MapNodes {
     #[doc = "Machine resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub machines: Vec<Machine>,
     #[doc = "Process resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub processes: Vec<Process>,
     #[doc = "Port resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<Port>,
     #[doc = "Client Group resources."]
-    #[serde(rename = "clientGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_groups: Vec<ClientGroup>,
 }
 impl MapNodes {
@@ -1143,19 +1192,44 @@ impl MultipleMachinesMapRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkConfiguration {
     #[doc = "IPv4 interfaces."]
-    #[serde(rename = "ipv4Interfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv4Interfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv4_interfaces: Vec<Ipv4NetworkInterface>,
     #[doc = "IPv6 interfaces."]
-    #[serde(rename = "ipv6Interfaces", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv6Interfaces",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv6_interfaces: Vec<Ipv6NetworkInterface>,
     #[doc = "Default IPv4 gateways."]
-    #[serde(rename = "defaultIpv4Gateways", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultIpv4Gateways",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_ipv4_gateways: Vec<String>,
     #[doc = "MAC addresses of all active network interfaces."]
-    #[serde(rename = "macAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "macAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mac_addresses: Vec<String>,
     #[doc = "DNS names associated with the machine."]
-    #[serde(rename = "dnsNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_names: Vec<String>,
 }
 impl NetworkConfiguration {
@@ -1245,7 +1319,11 @@ pub mod port {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PortCollection {
     #[doc = "Collection of Port resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Port>,
     #[doc = "The URL to the next set of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1423,7 +1501,11 @@ pub mod process {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProcessCollection {
     #[doc = "Collection of Process resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Process>,
     #[doc = "The URL to the next set of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1480,7 +1562,11 @@ pub struct ProcessDetails {
     #[serde(rename = "workingDirectory", default, skip_serializing_if = "Option::is_none")]
     pub working_directory: Option<String>,
     #[doc = "Collection of services hosted by this Process (Windows only)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub services: Vec<ProcessHostedService>,
     #[doc = "Process zone name (Linux only)."]
     #[serde(rename = "zoneName", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/signalr/src/package_2021_04_01_preview/models.rs b/services/mgmt/signalr/src/package_2021_04_01_preview/models.rs
index c26eb11aea..32e47c8807 100644
--- a/services/mgmt/signalr/src/package_2021_04_01_preview/models.rs
+++ b/services/mgmt/signalr/src/package_2021_04_01_preview/models.rs
@@ -89,10 +89,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -308,7 +317,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The dimensions of the metrics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
 }
 impl MetricSpecification {
@@ -352,10 +365,18 @@ impl NameAvailabilityParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkAcl {
     #[doc = "Allowed request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allow: Vec<SignalRRequestType>,
     #[doc = "Denied request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deny: Vec<SignalRRequestType>,
 }
 impl NetworkAcl {
@@ -412,7 +433,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -490,7 +515,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionList {
     #[doc = "The list of the private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -543,7 +572,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceList {
     #[doc = "List of PrivateLinkResource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -567,13 +600,28 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required members of the private link resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required private DNS zone names"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "The list of resources that are onboarded to private link service"]
-    #[serde(rename = "shareablePrivateLinkResourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareablePrivateLinkResourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shareable_private_link_resource_types: Vec<ShareablePrivateLinkResourceType>,
 }
 impl PrivateLinkResourceProperties {
@@ -765,7 +813,11 @@ impl ResourceSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerlessUpstreamSettings {
     #[doc = "Gets or sets the list of Upstream URL templates. Order matters, and the first matching template takes effects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub templates: Vec<UpstreamTemplate>,
 }
 impl ServerlessUpstreamSettings {
@@ -814,10 +866,20 @@ impl Serialize for ServiceKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Metrics for Azure Monitoring."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "Specifications of the Logs for Azure Monitoring."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -879,7 +941,11 @@ impl SharedPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedPrivateLinkResourceList {
     #[doc = "The list of the shared private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedPrivateLinkResource>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -973,7 +1039,12 @@ impl Serialize for SharedPrivateLinkResourceStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRCorsSettings {
     #[doc = "Gets or sets the list of origins that should be allowed to make cross-origin calls (for example: http://example.com:12345). Use \"*\" to allow all. If omitted, allow all by default."]
-    #[serde(rename = "allowedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_origins: Vec<String>,
 }
 impl SignalRCorsSettings {
@@ -1032,7 +1103,12 @@ pub struct SignalRNetworkAcLs {
     #[serde(rename = "publicNetwork", default, skip_serializing_if = "Option::is_none")]
     pub public_network: Option<NetworkAcl>,
     #[doc = "ACLs for requests from private endpoints"]
-    #[serde(rename = "privateEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoints: Vec<PrivateEndpointAcl>,
 }
 impl SignalRNetworkAcLs {
@@ -1062,16 +1138,30 @@ pub struct SignalRProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "Private endpoint connections to the resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
     #[doc = "TLS settings for the resource"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tls: Option<SignalRTlsSettings>,
     #[doc = "List of the featureFlags.\r\n\r\nFeatureFlags that are not included in the parameters for the update operation will not be modified.\r\nAnd the response will only include featureFlags that are explicitly set. \r\nWhen a featureFlag is not explicitly set, its globally default value will be used\r\nBut keep in mind, the default value doesn't mean \"false\". It varies in terms of different FeatureFlags."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<SignalRFeature>,
     #[doc = "Cross-Origin Resource Sharing (CORS) settings."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1160,7 +1250,11 @@ impl SignalRResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRResourceList {
     #[doc = "List of the resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SignalRResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1258,7 +1352,11 @@ impl SignalRUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRUsageList {
     #[doc = "List of the resource usages"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SignalRUsage>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/signalr/src/package_2021_06_01_preview/models.rs b/services/mgmt/signalr/src/package_2021_06_01_preview/models.rs
index aa4a33371e..228e8ff415 100644
--- a/services/mgmt/signalr/src/package_2021_06_01_preview/models.rs
+++ b/services/mgmt/signalr/src/package_2021_06_01_preview/models.rs
@@ -89,10 +89,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -308,7 +317,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The dimensions of the metrics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
 }
 impl MetricSpecification {
@@ -352,10 +365,18 @@ impl NameAvailabilityParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkAcl {
     #[doc = "Allowed request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allow: Vec<SignalRRequestType>,
     #[doc = "Denied request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deny: Vec<SignalRRequestType>,
 }
 impl NetworkAcl {
@@ -412,7 +433,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -490,7 +515,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionList {
     #[doc = "The list of the private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -543,7 +572,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceList {
     #[doc = "List of PrivateLinkResource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -567,13 +600,28 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required members of the private link resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required private DNS zone names"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "The list of resources that are onboarded to private link service"]
-    #[serde(rename = "shareablePrivateLinkResourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareablePrivateLinkResourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shareable_private_link_resource_types: Vec<ShareablePrivateLinkResourceType>,
 }
 impl PrivateLinkResourceProperties {
@@ -765,7 +813,11 @@ impl ResourceSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerlessUpstreamSettings {
     #[doc = "Gets or sets the list of Upstream URL templates. Order matters, and the first matching template takes effects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub templates: Vec<UpstreamTemplate>,
 }
 impl ServerlessUpstreamSettings {
@@ -814,10 +866,20 @@ impl Serialize for ServiceKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Metrics for Azure Monitoring."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "Specifications of the Logs for Azure Monitoring."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -879,7 +941,11 @@ impl SharedPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedPrivateLinkResourceList {
     #[doc = "The list of the shared private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedPrivateLinkResource>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -973,7 +1039,12 @@ impl Serialize for SharedPrivateLinkResourceStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRCorsSettings {
     #[doc = "Gets or sets the list of origins that should be allowed to make cross-origin calls (for example: http://example.com:12345). Use \"*\" to allow all. If omitted, allow all by default."]
-    #[serde(rename = "allowedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_origins: Vec<String>,
 }
 impl SignalRCorsSettings {
@@ -1032,7 +1103,12 @@ pub struct SignalRNetworkAcLs {
     #[serde(rename = "publicNetwork", default, skip_serializing_if = "Option::is_none")]
     pub public_network: Option<NetworkAcl>,
     #[doc = "ACLs for requests from private endpoints"]
-    #[serde(rename = "privateEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoints: Vec<PrivateEndpointAcl>,
 }
 impl SignalRNetworkAcLs {
@@ -1062,16 +1138,30 @@ pub struct SignalRProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "Private endpoint connections to the resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
     #[doc = "TLS settings for the resource"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tls: Option<SignalRTlsSettings>,
     #[doc = "List of the featureFlags.\r\n\r\nFeatureFlags that are not included in the parameters for the update operation will not be modified.\r\nAnd the response will only include featureFlags that are explicitly set. \r\nWhen a featureFlag is not explicitly set, its globally default value will be used\r\nBut keep in mind, the default value doesn't mean \"false\". It varies in terms of different FeatureFlags."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<SignalRFeature>,
     #[doc = "Cross-Origin Resource Sharing (CORS) settings."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1169,7 +1259,11 @@ impl SignalRResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRResourceList {
     #[doc = "List of the resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SignalRResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1267,7 +1361,11 @@ impl SignalRUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRUsageList {
     #[doc = "List of the resource usages"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SignalRUsage>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/signalr/src/package_2021_09_01_preview/models.rs b/services/mgmt/signalr/src/package_2021_09_01_preview/models.rs
index f8f6b0da90..9441e8f89c 100644
--- a/services/mgmt/signalr/src/package_2021_09_01_preview/models.rs
+++ b/services/mgmt/signalr/src/package_2021_09_01_preview/models.rs
@@ -89,10 +89,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -310,7 +319,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The dimensions of the metrics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
 }
 impl MetricSpecification {
@@ -354,10 +367,18 @@ impl NameAvailabilityParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkAcl {
     #[doc = "Allowed request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allow: Vec<SignalRRequestType>,
     #[doc = "Denied request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deny: Vec<SignalRRequestType>,
 }
 impl NetworkAcl {
@@ -414,7 +435,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -492,7 +517,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionList {
     #[doc = "The list of the private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -545,7 +574,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceList {
     #[doc = "List of PrivateLinkResource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -569,13 +602,28 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required members of the private link resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required private DNS zone names"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "The list of resources that are onboarded to private link service"]
-    #[serde(rename = "shareablePrivateLinkResourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareablePrivateLinkResourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shareable_private_link_resource_types: Vec<ShareablePrivateLinkResourceType>,
 }
 impl PrivateLinkResourceProperties {
@@ -806,7 +854,11 @@ impl Serialize for ScaleType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerlessUpstreamSettings {
     #[doc = "Gets or sets the list of Upstream URL templates. Order matters, and the first matching template takes effects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub templates: Vec<UpstreamTemplate>,
 }
 impl ServerlessUpstreamSettings {
@@ -855,10 +907,20 @@ impl Serialize for ServiceKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Metrics for Azure Monitoring."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "Specifications of the Logs for Azure Monitoring."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -920,7 +982,11 @@ impl SharedPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedPrivateLinkResourceList {
     #[doc = "The list of the shared private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedPrivateLinkResource>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1014,7 +1080,12 @@ impl Serialize for SharedPrivateLinkResourceStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRCorsSettings {
     #[doc = "Gets or sets the list of origins that should be allowed to make cross-origin calls (for example: http://example.com:12345). Use \"*\" to allow all. If omitted, allow all by default."]
-    #[serde(rename = "allowedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_origins: Vec<String>,
 }
 impl SignalRCorsSettings {
@@ -1073,7 +1144,12 @@ pub struct SignalRNetworkAcLs {
     #[serde(rename = "publicNetwork", default, skip_serializing_if = "Option::is_none")]
     pub public_network: Option<NetworkAcl>,
     #[doc = "ACLs for requests from private endpoints"]
-    #[serde(rename = "privateEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoints: Vec<PrivateEndpointAcl>,
 }
 impl SignalRNetworkAcLs {
@@ -1103,10 +1179,20 @@ pub struct SignalRProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "Private endpoint connections to the resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
     #[doc = "TLS settings for the resource"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1115,7 +1201,11 @@ pub struct SignalRProperties {
     #[serde(rename = "hostNamePrefix", default, skip_serializing_if = "Option::is_none")]
     pub host_name_prefix: Option<String>,
     #[doc = "List of the featureFlags.\r\n\r\nFeatureFlags that are not included in the parameters for the update operation will not be modified.\r\nAnd the response will only include featureFlags that are explicitly set. \r\nWhen a featureFlag is not explicitly set, its globally default value will be used\r\nBut keep in mind, the default value doesn't mean \"false\". It varies in terms of different FeatureFlags."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<SignalRFeature>,
     #[doc = "Cross-Origin Resource Sharing (CORS) settings."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1213,7 +1303,11 @@ impl SignalRResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRResourceList {
     #[doc = "List of the resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SignalRResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1311,7 +1405,11 @@ impl SignalRUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRUsageList {
     #[doc = "List of the resource usages"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SignalRUsage>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1374,7 +1472,12 @@ pub struct SkuCapacity {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub default: Option<i32>,
     #[doc = "Allows capacity value list."]
-    #[serde(rename = "allowedValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_values: Vec<i32>,
     #[doc = "The scale type applicable to the sku."]
     #[serde(rename = "scaleType", default, skip_serializing_if = "Option::is_none")]
@@ -1389,7 +1492,11 @@ impl SkuCapacity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuList {
     #[doc = "The list of skus available for the resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Sku>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/signalr/src/package_2021_10_01/models.rs b/services/mgmt/signalr/src/package_2021_10_01/models.rs
index 1ee759ff69..136f6a4a42 100644
--- a/services/mgmt/signalr/src/package_2021_10_01/models.rs
+++ b/services/mgmt/signalr/src/package_2021_10_01/models.rs
@@ -89,10 +89,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -310,7 +319,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The dimensions of the metrics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
 }
 impl MetricSpecification {
@@ -354,10 +367,18 @@ impl NameAvailabilityParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkAcl {
     #[doc = "Allowed request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allow: Vec<SignalRRequestType>,
     #[doc = "Denied request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deny: Vec<SignalRRequestType>,
 }
 impl NetworkAcl {
@@ -414,7 +435,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -492,7 +517,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionList {
     #[doc = "The list of the private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -519,7 +548,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "privateEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub private_endpoint: Option<PrivateEndpoint>,
     #[doc = "Group IDs"]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "Connection state of the private endpoint connection"]
     #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
@@ -548,7 +582,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceList {
     #[doc = "List of PrivateLinkResource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -572,13 +610,28 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required members of the private link resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required private DNS zone names"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "The list of resources that are onboarded to private link service"]
-    #[serde(rename = "shareablePrivateLinkResourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareablePrivateLinkResourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shareable_private_link_resource_types: Vec<ShareablePrivateLinkResourceType>,
 }
 impl PrivateLinkResourceProperties {
@@ -756,7 +809,11 @@ impl ResourceLogCategory {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceLogConfiguration {
     #[doc = "Gets or sets the list of category configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub categories: Vec<ResourceLogCategory>,
 }
 impl ResourceLogConfiguration {
@@ -836,7 +893,11 @@ impl Serialize for ScaleType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerlessUpstreamSettings {
     #[doc = "Gets or sets the list of Upstream URL templates. Order matters, and the first matching template takes effects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub templates: Vec<UpstreamTemplate>,
 }
 impl ServerlessUpstreamSettings {
@@ -885,10 +946,20 @@ impl Serialize for ServiceKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Metrics for Azure Monitoring."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "Specifications of the Logs for Azure Monitoring."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -950,7 +1021,11 @@ impl SharedPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedPrivateLinkResourceList {
     #[doc = "The list of the shared private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedPrivateLinkResource>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1044,7 +1119,12 @@ impl Serialize for SharedPrivateLinkResourceStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRCorsSettings {
     #[doc = "Gets or sets the list of origins that should be allowed to make cross-origin calls (for example: http://example.com:12345). Use \"*\" to allow all. If omitted, allow all by default."]
-    #[serde(rename = "allowedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_origins: Vec<String>,
 }
 impl SignalRCorsSettings {
@@ -1103,7 +1183,12 @@ pub struct SignalRNetworkAcLs {
     #[serde(rename = "publicNetwork", default, skip_serializing_if = "Option::is_none")]
     pub public_network: Option<NetworkAcl>,
     #[doc = "ACLs for requests from private endpoints"]
-    #[serde(rename = "privateEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoints: Vec<PrivateEndpointAcl>,
 }
 impl SignalRNetworkAcLs {
@@ -1133,10 +1218,20 @@ pub struct SignalRProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "Private endpoint connections to the resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
     #[doc = "TLS settings for the resource"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1145,7 +1240,11 @@ pub struct SignalRProperties {
     #[serde(rename = "hostNamePrefix", default, skip_serializing_if = "Option::is_none")]
     pub host_name_prefix: Option<String>,
     #[doc = "List of the featureFlags.\r\n\r\nFeatureFlags that are not included in the parameters for the update operation will not be modified.\r\nAnd the response will only include featureFlags that are explicitly set. \r\nWhen a featureFlag is not explicitly set, its globally default value will be used\r\nBut keep in mind, the default value doesn't mean \"false\". It varies in terms of different FeatureFlags."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<SignalRFeature>,
     #[doc = "Resource log configuration of a Microsoft.SignalRService resource."]
     #[serde(rename = "resourceLogConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -1246,7 +1345,11 @@ impl SignalRResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRResourceList {
     #[doc = "List of the resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SignalRResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1344,7 +1447,11 @@ impl SignalRUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRUsageList {
     #[doc = "List of the resource usages"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SignalRUsage>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1407,7 +1514,12 @@ pub struct SkuCapacity {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub default: Option<i32>,
     #[doc = "Allows capacity value list."]
-    #[serde(rename = "allowedValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_values: Vec<i32>,
     #[doc = "The scale type applicable to the sku."]
     #[serde(rename = "scaleType", default, skip_serializing_if = "Option::is_none")]
@@ -1422,7 +1534,11 @@ impl SkuCapacity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuList {
     #[doc = "The list of skus available for the resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Sku>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/signalr/src/package_2022_02_01/models.rs b/services/mgmt/signalr/src/package_2022_02_01/models.rs
index 2efd0b76f6..ea41caadb6 100644
--- a/services/mgmt/signalr/src/package_2022_02_01/models.rs
+++ b/services/mgmt/signalr/src/package_2022_02_01/models.rs
@@ -64,7 +64,11 @@ impl CustomCertificate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomCertificateList {
     #[doc = "List of custom certificates of this resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomCertificate>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -131,7 +135,11 @@ impl CustomDomain {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomDomainList {
     #[doc = "List of custom domains that bind to this resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomDomain>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -219,10 +227,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -350,7 +367,11 @@ pub struct LiveTraceConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<String>,
     #[doc = "Gets or sets the list of category configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub categories: Vec<LiveTraceCategory>,
 }
 impl LiveTraceConfiguration {
@@ -470,7 +491,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The dimensions of the metrics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
 }
 impl MetricSpecification {
@@ -514,10 +539,18 @@ impl NameAvailabilityParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkAcl {
     #[doc = "Allowed request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allow: Vec<SignalRRequestType>,
     #[doc = "Denied request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deny: Vec<SignalRRequestType>,
 }
 impl NetworkAcl {
@@ -574,7 +607,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -652,7 +689,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionList {
     #[doc = "The list of the private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -679,7 +720,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "privateEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub private_endpoint: Option<PrivateEndpoint>,
     #[doc = "Group IDs"]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "Connection state of the private endpoint connection"]
     #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
@@ -708,7 +754,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceList {
     #[doc = "List of PrivateLinkResource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -732,13 +782,28 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required members of the private link resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required private DNS zone names"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "The list of resources that are onboarded to private link service"]
-    #[serde(rename = "shareablePrivateLinkResourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareablePrivateLinkResourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shareable_private_link_resource_types: Vec<ShareablePrivateLinkResourceType>,
 }
 impl PrivateLinkResourceProperties {
@@ -916,7 +981,11 @@ impl ResourceLogCategory {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceLogConfiguration {
     #[doc = "Gets or sets the list of category configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub categories: Vec<ResourceLogCategory>,
 }
 impl ResourceLogConfiguration {
@@ -1008,7 +1077,11 @@ impl Serialize for ScaleType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerlessUpstreamSettings {
     #[doc = "Gets or sets the list of Upstream URL templates. Order matters, and the first matching template takes effects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub templates: Vec<UpstreamTemplate>,
 }
 impl ServerlessUpstreamSettings {
@@ -1057,10 +1130,20 @@ impl Serialize for ServiceKind {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Metrics for Azure Monitoring."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "Specifications of the Logs for Azure Monitoring."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -1122,7 +1205,11 @@ impl SharedPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedPrivateLinkResourceList {
     #[doc = "The list of the shared private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedPrivateLinkResource>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1216,7 +1303,12 @@ impl Serialize for SharedPrivateLinkResourceStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRCorsSettings {
     #[doc = "Gets or sets the list of origins that should be allowed to make cross-origin calls (for example: http://example.com:12345). Use \"*\" to allow all. If omitted, allow all by default."]
-    #[serde(rename = "allowedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_origins: Vec<String>,
 }
 impl SignalRCorsSettings {
@@ -1275,7 +1367,12 @@ pub struct SignalRNetworkAcLs {
     #[serde(rename = "publicNetwork", default, skip_serializing_if = "Option::is_none")]
     pub public_network: Option<NetworkAcl>,
     #[doc = "ACLs for requests from private endpoints"]
-    #[serde(rename = "privateEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoints: Vec<PrivateEndpointAcl>,
 }
 impl SignalRNetworkAcLs {
@@ -1305,10 +1402,20 @@ pub struct SignalRProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "Private endpoint connections to the resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
     #[doc = "TLS settings for the resource"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1317,7 +1424,11 @@ pub struct SignalRProperties {
     #[serde(rename = "hostNamePrefix", default, skip_serializing_if = "Option::is_none")]
     pub host_name_prefix: Option<String>,
     #[doc = "List of the featureFlags.\r\n\r\nFeatureFlags that are not included in the parameters for the update operation will not be modified.\r\nAnd the response will only include featureFlags that are explicitly set. \r\nWhen a featureFlag is not explicitly set, its globally default value will be used\r\nBut keep in mind, the default value doesn't mean \"false\". It varies in terms of different FeatureFlags."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<SignalRFeature>,
     #[doc = "Live trace configuration of a Microsoft.SignalRService resource."]
     #[serde(rename = "liveTraceConfiguration", default, skip_serializing_if = "Option::is_none")]
@@ -1421,7 +1532,11 @@ impl SignalRResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRResourceList {
     #[doc = "List of the resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SignalRResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1519,7 +1634,11 @@ impl SignalRUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRUsageList {
     #[doc = "List of the resource usages"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SignalRUsage>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1582,7 +1701,12 @@ pub struct SkuCapacity {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub default: Option<i32>,
     #[doc = "Allows capacity value list."]
-    #[serde(rename = "allowedValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_values: Vec<i32>,
     #[doc = "The scale type applicable to the sku."]
     #[serde(rename = "scaleType", default, skip_serializing_if = "Option::is_none")]
@@ -1597,7 +1721,11 @@ impl SkuCapacity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuList {
     #[doc = "The list of skus available for the resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Sku>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/softwareplan/src/package_2019_06_01_preview/models.rs b/services/mgmt/softwareplan/src/package_2019_06_01_preview/models.rs
index 310babbb83..846a5f01e1 100644
--- a/services/mgmt/softwareplan/src/package_2019_06_01_preview/models.rs
+++ b/services/mgmt/softwareplan/src/package_2019_06_01_preview/models.rs
@@ -65,7 +65,11 @@ impl Serialize for ErrorCode {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HybridUseBenefitListResult {
     #[doc = "List of hybrid use benefits"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HybridUseBenefitModel>,
     #[doc = "Url to get the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -149,7 +153,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of all operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResponse>,
     #[doc = "Url to get the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/softwareplan/src/package_2019_12_01/models.rs b/services/mgmt/softwareplan/src/package_2019_12_01/models.rs
index 310babbb83..846a5f01e1 100644
--- a/services/mgmt/softwareplan/src/package_2019_12_01/models.rs
+++ b/services/mgmt/softwareplan/src/package_2019_12_01/models.rs
@@ -65,7 +65,11 @@ impl Serialize for ErrorCode {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HybridUseBenefitListResult {
     #[doc = "List of hybrid use benefits"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HybridUseBenefitModel>,
     #[doc = "Url to get the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -149,7 +153,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of all operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationResponse>,
     #[doc = "Url to get the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/solutions/src/package_managedapplications_2018_09/models.rs b/services/mgmt/solutions/src/package_managedapplications_2018_09/models.rs
index 94b0211348..d0183cf028 100644
--- a/services/mgmt/solutions/src/package_managedapplications_2018_09/models.rs
+++ b/services/mgmt/solutions/src/package_managedapplications_2018_09/models.rs
@@ -223,7 +223,11 @@ impl Serialize for ApplicationDefinitionArtifactName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationDefinitionListResult {
     #[doc = "The array of managed application definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -265,10 +269,18 @@ pub struct ApplicationDefinitionProperties {
     #[serde(rename = "isEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_enabled: Option<bool>,
     #[doc = "The managed application provider authorizations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<ApplicationAuthorization>,
     #[doc = "The collection of managed application artifacts. The portal will use the files specified as artifacts to construct the user experience of creating a managed application from a managed application definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ApplicationDefinitionArtifact>,
     #[doc = "The managed application definition description."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -283,7 +295,11 @@ pub struct ApplicationDefinitionProperties {
     #[serde(rename = "createUiDefinition", default, skip_serializing_if = "Option::is_none")]
     pub create_ui_definition: Option<serde_json::Value>,
     #[doc = "The managed application provider policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policies: Vec<ApplicationPolicy>,
 }
 impl ApplicationDefinitionProperties {
@@ -312,7 +328,12 @@ pub struct ApplicationJitAccessPolicy {
     #[serde(rename = "jitApprovalMode", default, skip_serializing_if = "Option::is_none")]
     pub jit_approval_mode: Option<JitApprovalMode>,
     #[doc = "The JIT approvers"]
-    #[serde(rename = "jitApprovers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jitApprovers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jit_approvers: Vec<JitApproverDefinition>,
     #[doc = "The maximum duration JIT access is granted. This is an ISO8601 time period value."]
     #[serde(rename = "maximumJitAccessDuration", default, skip_serializing_if = "Option::is_none")]
@@ -332,7 +353,11 @@ impl ApplicationJitAccessPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationListResult {
     #[doc = "The array of managed applications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -460,7 +485,11 @@ pub struct ApplicationProperties {
     #[serde(rename = "publisherTenantId", default, skip_serializing_if = "Option::is_none")]
     pub publisher_tenant_id: Option<String>,
     #[doc = "The  read-only authorizations property that is retrieved from the application package."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<ApplicationAuthorization>,
     #[doc = "The application package contact information."]
     #[serde(rename = "customerSupport", default, skip_serializing_if = "Option::is_none")]
@@ -469,7 +498,11 @@ pub struct ApplicationProperties {
     #[serde(rename = "supportUrls", default, skip_serializing_if = "Option::is_none")]
     pub support_urls: Option<ApplicationPackageSupportUrls>,
     #[doc = "The collection of managed application artifacts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ApplicationArtifact>,
     #[doc = "The application client details to track the entity creating/updating the managed app resource."]
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
@@ -535,10 +568,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -752,7 +794,11 @@ impl JitRequestDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JitRequestDefinitionListResult {
     #[doc = "The array of Jit request definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JitRequestDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -957,7 +1003,12 @@ pub struct ListTokenRequest {
     #[serde(rename = "authorizationAudience", default, skip_serializing_if = "Option::is_none")]
     pub authorization_audience: Option<String>,
     #[doc = "The user assigned identities."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<UserAssignedIdentity>,
 }
 impl ListTokenRequest {
@@ -999,7 +1050,11 @@ impl ManagedIdentityToken {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedIdentityTokenResult {
     #[doc = "The array of managed identity tokens."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedIdentityToken>,
 }
 impl ManagedIdentityTokenResult {
@@ -1047,7 +1102,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/solutions/src/package_managedapplications_2019_07/models.rs b/services/mgmt/solutions/src/package_managedapplications_2019_07/models.rs
index a8da8e0e3a..01c268b42e 100644
--- a/services/mgmt/solutions/src/package_managedapplications_2019_07/models.rs
+++ b/services/mgmt/solutions/src/package_managedapplications_2019_07/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedUpgradePlansResult {
     #[doc = "The array of plans."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Plan>,
 }
 impl AllowedUpgradePlansResult {
@@ -235,7 +239,11 @@ impl Serialize for ApplicationDefinitionArtifactName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationDefinitionListResult {
     #[doc = "The array of managed application definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -277,10 +285,18 @@ pub struct ApplicationDefinitionProperties {
     #[serde(rename = "isEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_enabled: Option<bool>,
     #[doc = "The managed application provider authorizations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<ApplicationAuthorization>,
     #[doc = "The collection of managed application artifacts. The portal will use the files specified as artifacts to construct the user experience of creating a managed application from a managed application definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ApplicationDefinitionArtifact>,
     #[doc = "The managed application definition description."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -310,7 +326,11 @@ pub struct ApplicationDefinitionProperties {
     #[serde(rename = "managementPolicy", default, skip_serializing_if = "Option::is_none")]
     pub management_policy: Option<ApplicationManagementPolicy>,
     #[doc = "The managed application provider policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policies: Vec<ApplicationPolicy>,
 }
 impl ApplicationDefinitionProperties {
@@ -356,7 +376,12 @@ pub struct ApplicationJitAccessPolicy {
     #[serde(rename = "jitApprovalMode", default, skip_serializing_if = "Option::is_none")]
     pub jit_approval_mode: Option<JitApprovalMode>,
     #[doc = "The JIT approvers"]
-    #[serde(rename = "jitApprovers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jitApprovers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jit_approvers: Vec<JitApproverDefinition>,
     #[doc = "The maximum duration JIT access is granted. This is an ISO8601 time period value."]
     #[serde(rename = "maximumJitAccessDuration", default, skip_serializing_if = "Option::is_none")]
@@ -376,7 +401,11 @@ impl ApplicationJitAccessPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationListResult {
     #[doc = "The array of managed applications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -498,10 +527,20 @@ impl ApplicationPackageContact {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationPackageLockingPolicyDefinition {
     #[doc = "The deny assignment excluded actions."]
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
     #[doc = "The deny assignment excluded data actions."]
-    #[serde(rename = "allowedDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_data_actions: Vec<String>,
 }
 impl ApplicationPackageLockingPolicyDefinition {
@@ -593,7 +632,11 @@ pub struct ApplicationProperties {
     #[serde(rename = "publisherTenantId", default, skip_serializing_if = "Option::is_none")]
     pub publisher_tenant_id: Option<String>,
     #[doc = "The  read-only authorizations property that is retrieved from the application package."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<ApplicationAuthorization>,
     #[doc = "The management mode."]
     #[serde(rename = "managementMode", default, skip_serializing_if = "Option::is_none")]
@@ -605,7 +648,11 @@ pub struct ApplicationProperties {
     #[serde(rename = "supportUrls", default, skip_serializing_if = "Option::is_none")]
     pub support_urls: Option<ApplicationPackageSupportUrls>,
     #[doc = "The collection of managed application artifacts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ApplicationArtifact>,
     #[doc = "The application client details to track the entity creating/updating the managed app resource."]
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
@@ -710,10 +757,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -927,7 +983,11 @@ impl JitRequestDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JitRequestDefinitionListResult {
     #[doc = "The array of Jit request definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JitRequestDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1132,7 +1192,12 @@ pub struct ListTokenRequest {
     #[serde(rename = "authorizationAudience", default, skip_serializing_if = "Option::is_none")]
     pub authorization_audience: Option<String>,
     #[doc = "The user assigned identities."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<UserAssignedIdentity>,
 }
 impl ListTokenRequest {
@@ -1174,7 +1239,11 @@ impl ManagedIdentityToken {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedIdentityTokenResult {
     #[doc = "The array of managed identity tokens."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedIdentityToken>,
 }
 impl ManagedIdentityTokenResult {
@@ -1222,7 +1291,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/solutions/src/package_managedapplications_2020_08/models.rs b/services/mgmt/solutions/src/package_managedapplications_2020_08/models.rs
index 72577bc844..ec4a2471db 100644
--- a/services/mgmt/solutions/src/package_managedapplications_2020_08/models.rs
+++ b/services/mgmt/solutions/src/package_managedapplications_2020_08/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedUpgradePlansResult {
     #[doc = "The array of plans."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Plan>,
 }
 impl AllowedUpgradePlansResult {
@@ -235,7 +239,11 @@ impl Serialize for ApplicationDefinitionArtifactName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationDefinitionListResult {
     #[doc = "The array of managed application definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -277,10 +285,18 @@ pub struct ApplicationDefinitionProperties {
     #[serde(rename = "isEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_enabled: Option<bool>,
     #[doc = "The managed application provider authorizations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<ApplicationAuthorization>,
     #[doc = "The collection of managed application artifacts. The portal will use the files specified as artifacts to construct the user experience of creating a managed application from a managed application definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ApplicationDefinitionArtifact>,
     #[doc = "The managed application definition description."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -310,7 +326,11 @@ pub struct ApplicationDefinitionProperties {
     #[serde(rename = "managementPolicy", default, skip_serializing_if = "Option::is_none")]
     pub management_policy: Option<ApplicationManagementPolicy>,
     #[doc = "The managed application provider policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policies: Vec<ApplicationPolicy>,
 }
 impl ApplicationDefinitionProperties {
@@ -356,7 +376,12 @@ pub struct ApplicationJitAccessPolicy {
     #[serde(rename = "jitApprovalMode", default, skip_serializing_if = "Option::is_none")]
     pub jit_approval_mode: Option<JitApprovalMode>,
     #[doc = "The JIT approvers"]
-    #[serde(rename = "jitApprovers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jitApprovers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jit_approvers: Vec<JitApproverDefinition>,
     #[doc = "The maximum duration JIT access is granted. This is an ISO8601 time period value."]
     #[serde(rename = "maximumJitAccessDuration", default, skip_serializing_if = "Option::is_none")]
@@ -376,7 +401,11 @@ impl ApplicationJitAccessPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationListResult {
     #[doc = "The array of managed applications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -498,10 +527,20 @@ impl ApplicationPackageContact {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationPackageLockingPolicyDefinition {
     #[doc = "The deny assignment excluded actions."]
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
     #[doc = "The deny assignment excluded data actions."]
-    #[serde(rename = "allowedDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_data_actions: Vec<String>,
 }
 impl ApplicationPackageLockingPolicyDefinition {
@@ -593,7 +632,11 @@ pub struct ApplicationProperties {
     #[serde(rename = "publisherTenantId", default, skip_serializing_if = "Option::is_none")]
     pub publisher_tenant_id: Option<String>,
     #[doc = "The  read-only authorizations property that is retrieved from the application package."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<ApplicationAuthorization>,
     #[doc = "The management mode."]
     #[serde(rename = "managementMode", default, skip_serializing_if = "Option::is_none")]
@@ -605,7 +648,11 @@ pub struct ApplicationProperties {
     #[serde(rename = "supportUrls", default, skip_serializing_if = "Option::is_none")]
     pub support_urls: Option<ApplicationPackageSupportUrls>,
     #[doc = "The collection of managed application artifacts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ApplicationArtifact>,
     #[doc = "The application client details to track the entity creating/updating the managed app resource."]
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
@@ -710,10 +757,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -927,7 +983,11 @@ impl JitRequestDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JitRequestDefinitionListResult {
     #[doc = "The array of Jit request definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JitRequestDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1132,7 +1192,12 @@ pub struct ListTokenRequest {
     #[serde(rename = "authorizationAudience", default, skip_serializing_if = "Option::is_none")]
     pub authorization_audience: Option<String>,
     #[doc = "The user assigned identities."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<UserAssignedIdentity>,
 }
 impl ListTokenRequest {
@@ -1174,7 +1239,11 @@ impl ManagedIdentityToken {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedIdentityTokenResult {
     #[doc = "The array of managed identity tokens."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedIdentityToken>,
 }
 impl ManagedIdentityTokenResult {
@@ -1228,7 +1297,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Microsoft.Solutions operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/solutions/src/package_managedapplications_2021_02/models.rs b/services/mgmt/solutions/src/package_managedapplications_2021_02/models.rs
index bc40ef1b91..75e27da187 100644
--- a/services/mgmt/solutions/src/package_managedapplications_2021_02/models.rs
+++ b/services/mgmt/solutions/src/package_managedapplications_2021_02/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedUpgradePlansResult {
     #[doc = "The array of plans."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Plan>,
 }
 impl AllowedUpgradePlansResult {
@@ -235,7 +239,11 @@ impl Serialize for ApplicationDefinitionArtifactName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationDefinitionListResult {
     #[doc = "The array of managed application definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -277,10 +285,18 @@ pub struct ApplicationDefinitionProperties {
     #[serde(rename = "isEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_enabled: Option<bool>,
     #[doc = "The managed application provider authorizations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<ApplicationAuthorization>,
     #[doc = "The collection of managed application artifacts. The portal will use the files specified as artifacts to construct the user experience of creating a managed application from a managed application definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ApplicationDefinitionArtifact>,
     #[doc = "The managed application definition description."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -310,7 +326,11 @@ pub struct ApplicationDefinitionProperties {
     #[serde(rename = "managementPolicy", default, skip_serializing_if = "Option::is_none")]
     pub management_policy: Option<ApplicationManagementPolicy>,
     #[doc = "The managed application provider policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policies: Vec<ApplicationPolicy>,
 }
 impl ApplicationDefinitionProperties {
@@ -356,7 +376,12 @@ pub struct ApplicationJitAccessPolicy {
     #[serde(rename = "jitApprovalMode", default, skip_serializing_if = "Option::is_none")]
     pub jit_approval_mode: Option<JitApprovalMode>,
     #[doc = "The JIT approvers"]
-    #[serde(rename = "jitApprovers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jitApprovers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jit_approvers: Vec<JitApproverDefinition>,
     #[doc = "The maximum duration JIT access is granted. This is an ISO8601 time period value."]
     #[serde(rename = "maximumJitAccessDuration", default, skip_serializing_if = "Option::is_none")]
@@ -376,7 +401,11 @@ impl ApplicationJitAccessPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationListResult {
     #[doc = "The array of managed applications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -498,10 +527,20 @@ impl ApplicationPackageContact {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationPackageLockingPolicyDefinition {
     #[doc = "The deny assignment excluded actions."]
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
     #[doc = "The deny assignment excluded data actions."]
-    #[serde(rename = "allowedDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_data_actions: Vec<String>,
 }
 impl ApplicationPackageLockingPolicyDefinition {
@@ -593,7 +632,11 @@ pub struct ApplicationProperties {
     #[serde(rename = "publisherTenantId", default, skip_serializing_if = "Option::is_none")]
     pub publisher_tenant_id: Option<String>,
     #[doc = "The  read-only authorizations property that is retrieved from the application package."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<ApplicationAuthorization>,
     #[doc = "The management mode."]
     #[serde(rename = "managementMode", default, skip_serializing_if = "Option::is_none")]
@@ -605,7 +648,11 @@ pub struct ApplicationProperties {
     #[serde(rename = "supportUrls", default, skip_serializing_if = "Option::is_none")]
     pub support_urls: Option<ApplicationPackageSupportUrls>,
     #[doc = "The collection of managed application artifacts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ApplicationArtifact>,
     #[doc = "The application client details to track the entity creating/updating the managed app resource."]
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
@@ -710,10 +757,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -927,7 +983,11 @@ impl JitRequestDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JitRequestDefinitionListResult {
     #[doc = "The array of Jit request definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JitRequestDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1132,7 +1192,12 @@ pub struct ListTokenRequest {
     #[serde(rename = "authorizationAudience", default, skip_serializing_if = "Option::is_none")]
     pub authorization_audience: Option<String>,
     #[doc = "The user assigned identities."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<UserAssignedIdentity>,
 }
 impl ListTokenRequest {
@@ -1174,7 +1239,11 @@ impl ManagedIdentityToken {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedIdentityTokenResult {
     #[doc = "The array of managed identity tokens."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedIdentityToken>,
 }
 impl ManagedIdentityTokenResult {
@@ -1228,7 +1297,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Microsoft.Solutions operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/solutions/src/package_managedapplications_2021_07/models.rs b/services/mgmt/solutions/src/package_managedapplications_2021_07/models.rs
index e45106b65d..a0a5d9d790 100644
--- a/services/mgmt/solutions/src/package_managedapplications_2021_07/models.rs
+++ b/services/mgmt/solutions/src/package_managedapplications_2021_07/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedUpgradePlansResult {
     #[doc = "The array of plans."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Plan>,
 }
 impl AllowedUpgradePlansResult {
@@ -235,7 +239,11 @@ impl Serialize for ApplicationDefinitionArtifactName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationDefinitionListResult {
     #[doc = "The array of managed application definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -277,10 +285,18 @@ pub struct ApplicationDefinitionProperties {
     #[serde(rename = "isEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_enabled: Option<bool>,
     #[doc = "The managed application provider authorizations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<ApplicationAuthorization>,
     #[doc = "The collection of managed application artifacts. The portal will use the files specified as artifacts to construct the user experience of creating a managed application from a managed application definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ApplicationDefinitionArtifact>,
     #[doc = "The managed application definition description."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -310,7 +326,11 @@ pub struct ApplicationDefinitionProperties {
     #[serde(rename = "managementPolicy", default, skip_serializing_if = "Option::is_none")]
     pub management_policy: Option<ApplicationManagementPolicy>,
     #[doc = "The managed application provider policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub policies: Vec<ApplicationPolicy>,
 }
 impl ApplicationDefinitionProperties {
@@ -356,7 +376,12 @@ pub struct ApplicationJitAccessPolicy {
     #[serde(rename = "jitApprovalMode", default, skip_serializing_if = "Option::is_none")]
     pub jit_approval_mode: Option<JitApprovalMode>,
     #[doc = "The JIT approvers"]
-    #[serde(rename = "jitApprovers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jitApprovers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jit_approvers: Vec<JitApproverDefinition>,
     #[doc = "The maximum duration JIT access is granted. This is an ISO8601 time period value."]
     #[serde(rename = "maximumJitAccessDuration", default, skip_serializing_if = "Option::is_none")]
@@ -376,7 +401,11 @@ impl ApplicationJitAccessPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationListResult {
     #[doc = "The array of managed applications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -498,10 +527,20 @@ impl ApplicationPackageContact {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationPackageLockingPolicyDefinition {
     #[doc = "The deny assignment excluded actions."]
-    #[serde(rename = "allowedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_actions: Vec<String>,
     #[doc = "The deny assignment excluded data actions."]
-    #[serde(rename = "allowedDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_data_actions: Vec<String>,
 }
 impl ApplicationPackageLockingPolicyDefinition {
@@ -593,7 +632,11 @@ pub struct ApplicationProperties {
     #[serde(rename = "publisherTenantId", default, skip_serializing_if = "Option::is_none")]
     pub publisher_tenant_id: Option<String>,
     #[doc = "The  read-only authorizations property that is retrieved from the application package."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub authorizations: Vec<ApplicationAuthorization>,
     #[doc = "The management mode."]
     #[serde(rename = "managementMode", default, skip_serializing_if = "Option::is_none")]
@@ -605,7 +648,11 @@ pub struct ApplicationProperties {
     #[serde(rename = "supportUrls", default, skip_serializing_if = "Option::is_none")]
     pub support_urls: Option<ApplicationPackageSupportUrls>,
     #[doc = "The collection of managed application artifacts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<ApplicationArtifact>,
     #[doc = "The application client details to track the entity creating/updating the managed app resource."]
     #[serde(rename = "createdBy", default, skip_serializing_if = "Option::is_none")]
@@ -686,10 +733,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -903,7 +959,11 @@ impl JitRequestDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JitRequestDefinitionListResult {
     #[doc = "The array of Jit request definition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JitRequestDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1108,7 +1168,12 @@ pub struct ListTokenRequest {
     #[serde(rename = "authorizationAudience", default, skip_serializing_if = "Option::is_none")]
     pub authorization_audience: Option<String>,
     #[doc = "The user assigned identities."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<UserAssignedIdentity>,
 }
 impl ListTokenRequest {
@@ -1150,7 +1215,11 @@ impl ManagedIdentityToken {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedIdentityTokenResult {
     #[doc = "The array of managed identity tokens."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedIdentityToken>,
 }
 impl ManagedIdentityTokenResult {
@@ -1287,7 +1356,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/sql/src/package_composite_v2/models.rs b/services/mgmt/sql/src/package_composite_v2/models.rs
index 19cdf42d34..3b16e6f3f5 100644
--- a/services/mgmt/sql/src/package_composite_v2/models.rs
+++ b/services/mgmt/sql/src/package_composite_v2/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdministratorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerAzureAdAdministrator>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -221,7 +225,11 @@ pub mod automatic_tuning_server_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureAdOnlyAuthListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerAzureAdOnlyAuthentication>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -284,7 +292,11 @@ impl BackupShortTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupShortTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupShortTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -495,7 +507,11 @@ impl DataMaskingRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataMaskingRuleListResult {
     #[doc = "The list of database data masking rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataMaskingRule>,
 }
 impl azure_core::Continuable for DataMaskingRuleListResult {
@@ -686,7 +702,11 @@ impl DatabaseBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -718,7 +738,12 @@ pub struct DatabaseBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -792,7 +817,11 @@ impl DatabaseOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -973,13 +1002,28 @@ pub struct DatabaseProperties {
     #[serde(rename = "defaultSecondaryLocation", default, skip_serializing_if = "Option::is_none")]
     pub default_secondary_location: Option<String>,
     #[doc = "The list of service tier advisors for this database. Expanded property"]
-    #[serde(rename = "serviceTierAdvisors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceTierAdvisors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_tier_advisors: Vec<ServiceTierAdvisor>,
     #[doc = "The transparent data encryption info for this database."]
-    #[serde(rename = "transparentDataEncryption", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "transparentDataEncryption",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub transparent_data_encryption: Vec<TransparentDataEncryption>,
     #[doc = "The recommended indices for this database."]
-    #[serde(rename = "recommendedIndex", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recommendedIndex",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommended_index: Vec<RecommendedIndex>,
     #[doc = "The resource identifier of the failover group containing this database."]
     #[serde(rename = "failoverGroupId", default, skip_serializing_if = "Option::is_none")]
@@ -1722,7 +1766,11 @@ impl DatabaseVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1833,7 +1881,12 @@ pub struct EditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<CapabilityStatus>,
     #[doc = "The list of supported service objectives for the edition."]
-    #[serde(rename = "supportedServiceLevelObjectives", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServiceLevelObjectives",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_service_level_objectives: Vec<ServiceObjectiveCapability>,
     #[doc = "Whether or not zone redundancy is supported for the edition."]
     #[serde(rename = "zoneRedundant", default, skip_serializing_if = "Option::is_none")]
@@ -2069,16 +2122,31 @@ pub struct ElasticPoolDtuCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<CapabilityStatus>,
     #[doc = "The list of supported max sizes."]
-    #[serde(rename = "supportedMaxSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaxSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_max_sizes: Vec<MaxSizeCapability>,
     #[doc = "The maximum size limits for a database."]
     #[serde(rename = "includedMaxSize", default, skip_serializing_if = "Option::is_none")]
     pub included_max_size: Option<MaxSizeCapability>,
     #[doc = "The list of supported max database sizes."]
-    #[serde(rename = "supportedPerDatabaseMaxSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedPerDatabaseMaxSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_per_database_max_sizes: Vec<MaxSizeCapability>,
     #[doc = "The list of supported max database DTUs."]
-    #[serde(rename = "supportedPerDatabaseMaxDtus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedPerDatabaseMaxDtus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_per_database_max_dtus: Vec<ElasticPoolPerDatabaseMaxDtuCapability>,
 }
 impl ElasticPoolDtuCapability {
@@ -2096,7 +2164,12 @@ pub struct ElasticPoolEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<CapabilityStatus>,
     #[doc = "The list of supported elastic pool DTU levels for the edition."]
-    #[serde(rename = "supportedElasticPoolDtus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedElasticPoolDtus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_elastic_pool_dtus: Vec<ElasticPoolDtuCapability>,
     #[doc = "Whether or not zone redundancy is supported for the edition."]
     #[serde(rename = "zoneRedundant", default, skip_serializing_if = "Option::is_none")]
@@ -2142,7 +2215,11 @@ impl ElasticPoolOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ElasticPoolOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ElasticPoolOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2220,7 +2297,12 @@ pub struct ElasticPoolPerDatabaseMaxDtuCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<CapabilityStatus>,
     #[doc = "The list of supported min database DTUs."]
-    #[serde(rename = "supportedPerDatabaseMinDtus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedPerDatabaseMinDtus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_per_database_min_dtus: Vec<ElasticPoolPerDatabaseMinDtuCapability>,
 }
 impl ElasticPoolPerDatabaseMaxDtuCapability {
@@ -2402,7 +2484,11 @@ impl EncryptionProtector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EncryptionProtectorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EncryptionProtector>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2569,7 +2655,11 @@ impl ExtendedDatabaseBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtendedDatabaseBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtendedDatabaseBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2604,7 +2694,12 @@ pub struct ExtendedDatabaseBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -2662,7 +2757,11 @@ impl ExtendedServerBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtendedServerBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtendedServerBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2697,7 +2796,12 @@ pub struct ExtendedServerBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -2761,7 +2865,11 @@ impl FailoverGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FailoverGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FailoverGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2797,7 +2905,11 @@ pub struct FailoverGroupProperties {
     #[serde(rename = "partnerServers")]
     pub partner_servers: Vec<PartnerInfo>,
     #[doc = "List of databases in the failover group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
 }
 impl FailoverGroupProperties {
@@ -2991,7 +3103,11 @@ pub struct FailoverGroupUpdateProperties {
     #[serde(rename = "readOnlyEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub read_only_endpoint: Option<FailoverGroupReadOnlyEndpoint>,
     #[doc = "List of databases in the failover group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
 }
 impl FailoverGroupUpdateProperties {
@@ -3026,7 +3142,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of server firewall rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
 }
 impl azure_core::Continuable for FirewallRuleListResult {
@@ -3086,7 +3206,11 @@ impl GeoBackupPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GeoBackupPolicyListResult {
     #[doc = "The list of geo backup policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GeoBackupPolicy>,
 }
 impl azure_core::Continuable for GeoBackupPolicyListResult {
@@ -3533,7 +3657,11 @@ impl InstanceFailoverGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstanceFailoverGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InstanceFailoverGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3767,7 +3895,11 @@ impl InstancePool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstancePoolListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InstancePool>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3897,7 +4029,11 @@ impl JobAgent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobAgentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobAgent>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4005,7 +4141,11 @@ impl JobCredential {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCredentialListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobCredential>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4053,7 +4193,11 @@ impl JobExecution {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobExecutionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobExecution>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4285,7 +4429,11 @@ pub mod job_execution_target {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4504,7 +4652,11 @@ impl JobStepExecutionOptions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobStepListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobStep>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4750,7 +4902,11 @@ impl JobTargetGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobTargetGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobTargetGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4793,7 +4949,11 @@ impl JobVersion {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobVersionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobVersion>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4820,7 +4980,12 @@ pub struct LocationCapabilities {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<CapabilityStatus>,
     #[doc = "The list of supported server versions."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
 }
 impl LocationCapabilities {
@@ -4832,7 +4997,11 @@ impl LocationCapabilities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogicalServerSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4867,7 +5036,11 @@ impl LongTermRetentionBackup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LongTermRetentionBackupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LongTermRetentionBackup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4950,7 +5123,11 @@ impl ManagedBackupShortTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedBackupShortTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedBackupShortTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5000,7 +5177,11 @@ impl ManagedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5231,7 +5412,11 @@ impl ManagedDatabaseSecurityAlertPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedDatabaseSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedDatabaseSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5306,7 +5491,11 @@ impl ManagedInstanceAdministrator {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceAdministratorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceAdministrator>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5389,7 +5578,11 @@ pub mod managed_instance_administrator_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceAzureAdOnlyAuthListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceAzureAdOnlyAuthentication>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5455,7 +5648,11 @@ impl ManagedInstanceEncryptionProtector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceEncryptionProtectorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceEncryptionProtector>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5559,7 +5756,11 @@ impl ManagedInstanceKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceKeyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceKey>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5646,7 +5847,11 @@ pub mod managed_instance_key_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5681,7 +5886,11 @@ impl ManagedInstanceLongTermRetentionBackup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceLongTermRetentionBackupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceLongTermRetentionBackup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5743,7 +5952,11 @@ impl ManagedInstanceLongTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceLongTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceLongTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5899,7 +6112,12 @@ pub struct ManagedInstanceProperties {
     #[serde(rename = "maintenanceConfigurationId", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_configuration_id: Option<String>,
     #[doc = "List of private endpoint connections on a managed instance."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ManagedInstancePecProperty>,
     #[doc = "Minimal TLS version. Allowed values: 'None', '1.0', '1.1', '1.2'"]
     #[serde(rename = "minimalTlsVersion", default, skip_serializing_if = "Option::is_none")]
@@ -6122,7 +6340,11 @@ impl ManagedInstanceVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6183,7 +6405,11 @@ impl ManagedServerSecurityAlertPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedServerSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedServerSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6248,7 +6474,12 @@ pub struct Metric {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<MetricName>,
     #[doc = "The metric values for the specified time window and timestep."]
-    #[serde(rename = "metricValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_values: Vec<MetricValue>,
 }
 impl Metric {
@@ -6341,7 +6572,12 @@ pub struct MetricDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<metric_definition::Unit>,
     #[doc = "The list of database metric availabilities for the metric."]
-    #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricAvailabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_availabilities: Vec<MetricAvailability>,
 }
 impl MetricDefinition {
@@ -6642,7 +6878,11 @@ impl OperationImpact {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6817,7 +7057,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6925,7 +7169,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6949,7 +7197,12 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -7079,7 +7332,11 @@ pub struct QueryMetricInterval {
     #[serde(rename = "executionCount", default, skip_serializing_if = "Option::is_none")]
     pub execution_count: Option<i64>,
     #[doc = "List of metric objects for this interval"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<QueryMetricProperties>,
 }
 impl QueryMetricInterval {
@@ -7229,7 +7486,11 @@ pub struct QueryStatisticsProperties {
     #[serde(rename = "endTime", default, skip_serializing_if = "Option::is_none")]
     pub end_time: Option<String>,
     #[doc = "List of intervals with appropriate metric data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub intervals: Vec<QueryMetricInterval>,
 }
 impl QueryStatisticsProperties {
@@ -7334,10 +7595,18 @@ pub struct RecommendedElasticPoolProperties {
     #[serde(rename = "maxObservedStorageMB", default, skip_serializing_if = "Option::is_none")]
     pub max_observed_storage_mb: Option<f64>,
     #[doc = "The list of databases in this pool. Expanded property"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<Database>,
     #[doc = "The list of databases housed in the server. Expanded property"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<RecommendedElasticPoolMetric>,
 }
 impl RecommendedElasticPoolProperties {
@@ -7430,19 +7699,38 @@ pub struct RecommendedIndexProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub table: Option<String>,
     #[doc = "Columns over which to build index"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<String>,
     #[doc = "The list of column names to be included in the index"]
-    #[serde(rename = "includedColumns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedColumns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_columns: Vec<String>,
     #[doc = "The full build index script"]
     #[serde(rename = "indexScript", default, skip_serializing_if = "Option::is_none")]
     pub index_script: Option<String>,
     #[doc = "The estimated impact of doing recommended index action."]
-    #[serde(rename = "estimatedImpact", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "estimatedImpact",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub estimated_impact: Vec<OperationImpact>,
     #[doc = "The values reported after index action is complete."]
-    #[serde(rename = "reportedImpact", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reportedImpact",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reported_impact: Vec<OperationImpact>,
 }
 impl RecommendedIndexProperties {
@@ -7558,7 +7846,11 @@ impl RecoverableManagedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoverableManagedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoverableManagedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7611,7 +7903,11 @@ impl ReplicationLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationLinkListResult {
     #[doc = "The list of database replication links housed in the database."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationLink>,
 }
 impl azure_core::Continuable for ReplicationLinkListResult {
@@ -7910,7 +8206,11 @@ impl RestorableDroppedManagedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableDroppedManagedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableDroppedManagedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7969,7 +8269,11 @@ impl RestorePoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorePoint>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8024,10 +8328,20 @@ pub struct SecurityAlertPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled or a policy has not been applied yet on the specific database."]
     pub state: security_alert_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly, Data_Exfiltration, Unsafe_Action"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -8087,7 +8401,11 @@ impl SensitivityLabel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SensitivityLabelListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SensitivityLabel>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8226,7 +8544,11 @@ impl ServerBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8258,7 +8580,12 @@ pub struct ServerBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -8321,7 +8648,11 @@ impl ServerCommunicationLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerCommunicationLinkListResult {
     #[doc = "The list of server communication links."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerCommunicationLink>,
 }
 impl azure_core::Continuable for ServerCommunicationLinkListResult {
@@ -8425,7 +8756,11 @@ impl ServerDnsAliasAcquisition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerDnsAliasListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerDnsAlias>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8490,7 +8825,11 @@ impl ServerKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerKeyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerKey>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8581,7 +8920,11 @@ pub mod server_key_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8632,7 +8975,12 @@ pub struct ServerProperties {
     #[serde(rename = "fullyQualifiedDomainName", default, skip_serializing_if = "Option::is_none")]
     pub fully_qualified_domain_name: Option<String>,
     #[doc = "List of private endpoint connections on a server"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ServerPrivateEndpointConnection>,
     #[doc = "Minimal TLS version. Allowed values: '1.0', '1.1', '1.2'"]
     #[serde(rename = "minimalTlsVersion", default, skip_serializing_if = "Option::is_none")]
@@ -8718,7 +9066,11 @@ impl ServerTrustGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerTrustGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerTrustGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8825,10 +9177,20 @@ pub struct ServerVersionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<CapabilityStatus>,
     #[doc = "The list of supported database editions."]
-    #[serde(rename = "supportedEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_editions: Vec<EditionCapability>,
     #[doc = "The list of supported elastic pool editions."]
-    #[serde(rename = "supportedElasticPoolEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedElasticPoolEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_elastic_pool_editions: Vec<ElasticPoolEditionCapability>,
 }
 impl ServerVersionCapability {
@@ -8854,7 +9216,11 @@ impl ServerVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8927,7 +9293,12 @@ pub struct ServiceObjectiveCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "The list of supported maximum database sizes for this service objective."]
-    #[serde(rename = "supportedMaxSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaxSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_max_sizes: Vec<MaxSizeCapability>,
     #[doc = "The maximum size limits for a database."]
     #[serde(rename = "includedMaxSize", default, skip_serializing_if = "Option::is_none")]
@@ -9035,7 +9406,12 @@ pub struct ServiceTierAdvisorProperties {
     #[serde(rename = "maxSizeInGB", default, skip_serializing_if = "Option::is_none")]
     pub max_size_in_gb: Option<f64>,
     #[doc = "Gets or sets serviceLevelObjectiveUsageMetrics for the service tier advisor."]
-    #[serde(rename = "serviceLevelObjectiveUsageMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceLevelObjectiveUsageMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_level_objective_usage_metrics: Vec<SloUsageMetric>,
     #[doc = "Gets or sets currentServiceLevelObjective for service tier advisor."]
     #[serde(rename = "currentServiceLevelObjective", default, skip_serializing_if = "Option::is_none")]
@@ -9376,7 +9752,11 @@ impl SubscriptionUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionUsageListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionUsage>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9458,7 +9838,11 @@ impl SyncAgentLinkedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncAgentLinkedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncAgentLinkedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9546,7 +9930,11 @@ pub mod sync_agent_linked_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncAgentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncAgent>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9639,7 +10027,11 @@ pub mod sync_agent_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncDatabaseIdListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncDatabaseIdProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9672,7 +10064,11 @@ impl SyncDatabaseIdProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncFullSchemaProperties {
     #[doc = "List of tables in the database full schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<SyncFullSchemaTable>,
     #[doc = "Last update time of the database schema."]
     #[serde(rename = "lastUpdateTime", default, with = "azure_core::date::rfc3339::option")]
@@ -9687,7 +10083,11 @@ impl SyncFullSchemaProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncFullSchemaPropertiesListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncFullSchemaProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9708,7 +10108,11 @@ impl SyncFullSchemaPropertiesListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncFullSchemaTable {
     #[doc = "List of columns in the table of database full schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<SyncFullSchemaTableColumn>,
     #[doc = "Error id of the table."]
     #[serde(rename = "errorId", default, skip_serializing_if = "Option::is_none")]
@@ -9776,7 +10180,11 @@ impl SyncGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9797,7 +10205,11 @@ impl SyncGroupListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupLogListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncGroupLogProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10011,7 +10423,11 @@ pub mod sync_group_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupSchema {
     #[doc = "List of tables in sync group schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<SyncGroupSchemaTable>,
     #[doc = "Name of master sync member where the schema is from."]
     #[serde(rename = "masterSyncMemberName", default, skip_serializing_if = "Option::is_none")]
@@ -10026,7 +10442,11 @@ impl SyncGroupSchema {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupSchemaTable {
     #[doc = "List of columns in sync group schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<SyncGroupSchemaTableColumn>,
     #[doc = "Quoted name of sync group schema table."]
     #[serde(rename = "quotedName", default, skip_serializing_if = "Option::is_none")]
@@ -10073,7 +10493,11 @@ impl SyncMember {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncMemberListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncMember>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10336,7 +10760,11 @@ pub struct TopQueries {
     #[serde(rename = "endTime", default, skip_serializing_if = "Option::is_none")]
     pub end_time: Option<String>,
     #[doc = "List of top resource consuming queries with appropriate metric data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub queries: Vec<QueryStatisticsProperties>,
 }
 impl TopQueries {
@@ -10390,7 +10818,11 @@ pub mod top_queries {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopQueriesListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TopQueries>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10600,7 +11032,11 @@ impl Usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10638,7 +11074,11 @@ impl VirtualCluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualClusterListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualCluster>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10665,7 +11105,12 @@ pub struct VirtualClusterProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub family: Option<String>,
     #[doc = "List of resources in this virtual cluster."]
-    #[serde(rename = "childResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_resources: Vec<String>,
 }
 impl VirtualClusterProperties {
@@ -10706,7 +11151,11 @@ impl VirtualNetworkRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkRuleListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkRule>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10801,7 +11250,11 @@ pub struct VulnerabilityAssessmentRecurringScansProperties {
     #[serde(rename = "emailSubscriptionAdmins", default, skip_serializing_if = "Option::is_none")]
     pub email_subscription_admins: Option<bool>,
     #[doc = "Specifies an array of e-mail addresses to which the scan notification is sent."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
 }
 impl VulnerabilityAssessmentRecurringScansProperties {
@@ -10842,7 +11295,11 @@ impl VulnerabilityAssessmentScanRecord {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VulnerabilityAssessmentScanRecordListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VulnerabilityAssessmentScanRecord>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10878,7 +11335,11 @@ pub struct VulnerabilityAssessmentScanRecordProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The scan errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<VulnerabilityAssessmentScanError>,
     #[doc = "The scan results storage container path."]
     #[serde(rename = "storageContainerPath", default, skip_serializing_if = "Option::is_none")]
@@ -10991,7 +11452,11 @@ impl WorkloadClassifier {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadClassifierListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadClassifier>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11060,7 +11525,11 @@ impl WorkloadGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/sql/src/package_composite_v3/models.rs b/services/mgmt/sql/src/package_composite_v3/models.rs
index d638a542f0..2d345f1f02 100644
--- a/services/mgmt/sql/src/package_composite_v3/models.rs
+++ b/services/mgmt/sql/src/package_composite_v3/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdministratorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerAzureAdAdministrator>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -286,7 +290,11 @@ pub mod automatic_tuning_server_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureAdOnlyAuthListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerAzureAdOnlyAuthentication>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -349,7 +357,11 @@ impl BackupShortTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupShortTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupShortTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -552,7 +564,11 @@ impl DataMaskingRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataMaskingRuleListResult {
     #[doc = "The list of database data masking rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataMaskingRule>,
 }
 impl azure_core::Continuable for DataMaskingRuleListResult {
@@ -751,7 +767,11 @@ impl DatabaseBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -783,7 +803,12 @@ pub struct DatabaseBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -826,7 +851,11 @@ pub mod database_blob_auditing_policy_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -861,7 +890,11 @@ impl DatabaseOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2028,7 +2061,11 @@ impl DatabaseVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2136,7 +2173,12 @@ pub struct EditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported service objectives for the edition."]
-    #[serde(rename = "supportedServiceLevelObjectives", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServiceLevelObjectives",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_service_level_objectives: Vec<ServiceObjectiveCapability>,
     #[doc = "Whether or not zone redundancy is supported for the edition."]
     #[serde(rename = "zoneRedundant", default, skip_serializing_if = "Option::is_none")]
@@ -2145,7 +2187,12 @@ pub struct EditionCapability {
     #[serde(rename = "readScale", default, skip_serializing_if = "Option::is_none")]
     pub read_scale: Option<ReadScaleCapability>,
     #[doc = "The list of supported storage capabilities for this edition"]
-    #[serde(rename = "supportedStorageCapabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageCapabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_capabilities: Vec<StorageCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2393,7 +2440,12 @@ pub struct ElasticPoolEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported elastic pool DTU levels for the edition."]
-    #[serde(rename = "supportedElasticPoolPerformanceLevels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedElasticPoolPerformanceLevels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_elastic_pool_performance_levels: Vec<ElasticPoolPerformanceLevelCapability>,
     #[doc = "Whether or not zone redundancy is supported for the edition."]
     #[serde(rename = "zoneRedundant", default, skip_serializing_if = "Option::is_none")]
@@ -2425,7 +2477,11 @@ pub mod elastic_pool_edition_capability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ElasticPoolListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ElasticPool>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2460,7 +2516,11 @@ impl ElasticPoolOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ElasticPoolOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ElasticPoolOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2541,6 +2601,7 @@ pub struct ElasticPoolPerDatabaseMaxPerformanceLevelCapability {
     #[serde(
         rename = "supportedPerDatabaseMinPerformanceLevels",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub supported_per_database_min_performance_levels: Vec<ElasticPoolPerDatabaseMinPerformanceLevelCapability>,
@@ -2700,7 +2761,12 @@ pub struct ElasticPoolPerformanceLevelCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<Sku>,
     #[doc = "List of supported license types."]
-    #[serde(rename = "supportedLicenseTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLicenseTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_license_types: Vec<LicenseTypeCapability>,
     #[doc = "The maximum number of databases supported."]
     #[serde(rename = "maxDatabaseCount", default, skip_serializing_if = "Option::is_none")]
@@ -2709,15 +2775,26 @@ pub struct ElasticPoolPerformanceLevelCapability {
     #[serde(rename = "includedMaxSize", default, skip_serializing_if = "Option::is_none")]
     pub included_max_size: Option<MaxSizeCapability>,
     #[doc = "The list of supported max sizes."]
-    #[serde(rename = "supportedMaxSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaxSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_max_sizes: Vec<MaxSizeRangeCapability>,
     #[doc = "The list of supported per database max sizes."]
-    #[serde(rename = "supportedPerDatabaseMaxSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedPerDatabaseMaxSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_per_database_max_sizes: Vec<MaxSizeRangeCapability>,
     #[doc = "The list of supported per database max performance levels."]
     #[serde(
         rename = "supportedPerDatabaseMaxPerformanceLevels",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub supported_per_database_max_performance_levels: Vec<ElasticPoolPerDatabaseMaxPerformanceLevelCapability>,
@@ -2956,7 +3033,11 @@ impl EncryptionProtector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EncryptionProtectorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EncryptionProtector>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3145,7 +3226,11 @@ impl ExtendedDatabaseBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtendedDatabaseBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtendedDatabaseBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3180,7 +3265,12 @@ pub struct ExtendedDatabaseBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -3238,7 +3328,11 @@ impl ExtendedServerBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtendedServerBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtendedServerBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3273,7 +3367,12 @@ pub struct ExtendedServerBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -3337,7 +3436,11 @@ impl FailoverGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FailoverGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FailoverGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3373,7 +3476,11 @@ pub struct FailoverGroupProperties {
     #[serde(rename = "partnerServers")]
     pub partner_servers: Vec<PartnerInfo>,
     #[doc = "List of databases in the failover group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
 }
 impl FailoverGroupProperties {
@@ -3567,7 +3674,11 @@ pub struct FailoverGroupUpdateProperties {
     #[serde(rename = "readOnlyEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub read_only_endpoint: Option<FailoverGroupReadOnlyEndpoint>,
     #[doc = "List of databases in the failover group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
 }
 impl FailoverGroupUpdateProperties {
@@ -3602,7 +3713,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of server firewall rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
 }
 impl azure_core::Continuable for FirewallRuleListResult {
@@ -3662,7 +3777,11 @@ impl GeoBackupPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GeoBackupPolicyListResult {
     #[doc = "The list of geo backup policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GeoBackupPolicy>,
 }
 impl azure_core::Continuable for GeoBackupPolicyListResult {
@@ -3828,7 +3947,12 @@ pub struct ImportExportOperationResultProperties {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "Gets the status of private endpoints associated with this request."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionRequestStatus>,
 }
 impl ImportExportOperationResultProperties {
@@ -3954,7 +4078,11 @@ impl InstanceFailoverGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstanceFailoverGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InstanceFailoverGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4191,7 +4319,12 @@ pub struct InstancePoolEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The supported families."]
-    #[serde(rename = "supportedFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_families: Vec<InstancePoolFamilyCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4223,10 +4356,20 @@ pub struct InstancePoolFamilyCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of supported license types."]
-    #[serde(rename = "supportedLicenseTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLicenseTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_license_types: Vec<LicenseTypeCapability>,
     #[doc = "List of supported virtual cores values."]
-    #[serde(rename = "supportedVcoresValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedVcoresValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_vcores_values: Vec<InstancePoolVcoresCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4255,7 +4398,11 @@ pub mod instance_pool_family_capability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstancePoolListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InstancePool>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4420,7 +4567,11 @@ impl JobAgent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobAgentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobAgent>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4528,7 +4679,11 @@ impl JobCredential {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCredentialListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobCredential>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4576,7 +4731,11 @@ impl JobExecution {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobExecutionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobExecution>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4808,7 +4967,11 @@ pub mod job_execution_target {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5027,7 +5190,11 @@ impl JobStepExecutionOptions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobStepListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobStep>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5273,7 +5440,11 @@ impl JobTargetGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobTargetGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobTargetGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5316,7 +5487,11 @@ impl JobVersion {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobVersionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobVersion>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5369,10 +5544,20 @@ pub struct LocationCapabilities {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported server versions."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
     #[doc = "The list of supported managed instance versions."]
-    #[serde(rename = "supportedManagedInstanceVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedManagedInstanceVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_managed_instance_versions: Vec<ManagedInstanceVersionCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5462,7 +5647,11 @@ pub mod log_size_capability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogicalServerSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5497,7 +5686,11 @@ impl LongTermRetentionBackup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LongTermRetentionBackupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LongTermRetentionBackup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5580,7 +5773,11 @@ impl ManagedBackupShortTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedBackupShortTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedBackupShortTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5630,7 +5827,11 @@ impl ManagedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5861,7 +6062,11 @@ impl ManagedDatabaseSecurityAlertPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedDatabaseSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedDatabaseSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5936,7 +6141,11 @@ impl ManagedInstanceAdministrator {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceAdministratorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceAdministrator>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6019,7 +6228,11 @@ pub mod managed_instance_administrator_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceAzureAdOnlyAuthListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceAzureAdOnlyAuthentication>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6071,7 +6284,12 @@ pub struct ManagedInstanceEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The supported families."]
-    #[serde(rename = "supportedFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_families: Vec<ManagedInstanceFamilyCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6117,7 +6335,11 @@ impl ManagedInstanceEncryptionProtector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceEncryptionProtectorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceEncryptionProtector>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6210,10 +6432,20 @@ pub struct ManagedInstanceFamilyCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<String>,
     #[doc = "List of supported license types."]
-    #[serde(rename = "supportedLicenseTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLicenseTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_license_types: Vec<LicenseTypeCapability>,
     #[doc = "List of supported virtual cores values."]
-    #[serde(rename = "supportedVcoresValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedVcoresValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_vcores_values: Vec<ManagedInstanceVcoresCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6259,7 +6491,11 @@ impl ManagedInstanceKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceKeyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceKey>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6346,7 +6582,11 @@ pub mod managed_instance_key_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6381,7 +6621,11 @@ impl ManagedInstanceLongTermRetentionBackup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceLongTermRetentionBackupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceLongTermRetentionBackup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6443,7 +6687,11 @@ impl ManagedInstanceLongTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceLongTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceLongTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6478,7 +6726,11 @@ impl ManagedInstanceOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6620,7 +6872,12 @@ pub struct ManagedInstanceOperationSteps {
     #[serde(rename = "currentStep", default, skip_serializing_if = "Option::is_none")]
     pub current_step: Option<i32>,
     #[doc = "The operation steps list."]
-    #[serde(rename = "stepsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "stepsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub steps_list: Vec<UpsertManagedServerOperationStep>,
 }
 impl ManagedInstanceOperationSteps {
@@ -6767,7 +7024,12 @@ pub struct ManagedInstanceProperties {
     #[serde(rename = "maintenanceConfigurationId", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_configuration_id: Option<String>,
     #[doc = "List of private endpoint connections on a managed instance."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ManagedInstancePecProperty>,
     #[doc = "Minimal TLS version. Allowed values: 'None', '1.0', '1.1', '1.2'"]
     #[serde(rename = "minimalTlsVersion", default, skip_serializing_if = "Option::is_none")]
@@ -6985,7 +7247,12 @@ pub struct ManagedInstanceVcoresCapability {
     #[serde(rename = "includedMaxSize", default, skip_serializing_if = "Option::is_none")]
     pub included_max_size: Option<MaxSizeCapability>,
     #[doc = "Storage size ranges."]
-    #[serde(rename = "supportedStorageSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_sizes: Vec<MaxSizeRangeCapability>,
     #[doc = "True if this service objective is supported for managed instances in an instance pool."]
     #[serde(rename = "instancePoolSupported", default, skip_serializing_if = "Option::is_none")]
@@ -7023,10 +7290,20 @@ pub struct ManagedInstanceVersionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported managed instance editions."]
-    #[serde(rename = "supportedEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_editions: Vec<ManagedInstanceEditionCapability>,
     #[doc = "The list of supported instance pool editions."]
-    #[serde(rename = "supportedInstancePoolEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedInstancePoolEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_instance_pool_editions: Vec<InstancePoolEditionCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7069,7 +7346,11 @@ impl ManagedInstanceVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7130,7 +7411,11 @@ impl ManagedServerSecurityAlertPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedServerSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedServerSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7263,7 +7548,12 @@ pub struct Metric {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<MetricName>,
     #[doc = "The metric values for the specified time window and timestep."]
-    #[serde(rename = "metricValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_values: Vec<MetricValue>,
 }
 impl Metric {
@@ -7356,7 +7646,12 @@ pub struct MetricDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<metric_definition::Unit>,
     #[doc = "The list of database metric availabilities for the metric."]
-    #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricAvailabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_availabilities: Vec<MetricAvailability>,
 }
 impl MetricDefinition {
@@ -7701,7 +7996,11 @@ impl OperationImpact {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7908,7 +8207,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8034,7 +8337,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8058,7 +8365,12 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -8188,7 +8500,11 @@ pub struct QueryMetricInterval {
     #[serde(rename = "executionCount", default, skip_serializing_if = "Option::is_none")]
     pub execution_count: Option<i64>,
     #[doc = "List of metric objects for this interval"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<QueryMetricProperties>,
 }
 impl QueryMetricInterval {
@@ -8338,7 +8654,11 @@ pub struct QueryStatisticsProperties {
     #[serde(rename = "endTime", default, skip_serializing_if = "Option::is_none")]
     pub end_time: Option<String>,
     #[doc = "List of intervals with appropriate metric data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub intervals: Vec<QueryMetricInterval>,
 }
 impl QueryStatisticsProperties {
@@ -8472,10 +8792,18 @@ pub struct RecommendedElasticPoolProperties {
     #[serde(rename = "maxObservedStorageMB", default, skip_serializing_if = "Option::is_none")]
     pub max_observed_storage_mb: Option<f64>,
     #[doc = "The list of databases in this pool. Expanded property"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<TrackedResource>,
     #[doc = "The list of databases housed in the server. Expanded property"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<RecommendedElasticPoolMetric>,
 }
 impl RecommendedElasticPoolProperties {
@@ -8568,19 +8896,38 @@ pub struct RecommendedIndexProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub table: Option<String>,
     #[doc = "Columns over which to build index"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<String>,
     #[doc = "The list of column names to be included in the index"]
-    #[serde(rename = "includedColumns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedColumns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_columns: Vec<String>,
     #[doc = "The full build index script"]
     #[serde(rename = "indexScript", default, skip_serializing_if = "Option::is_none")]
     pub index_script: Option<String>,
     #[doc = "The estimated impact of doing recommended index action."]
-    #[serde(rename = "estimatedImpact", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "estimatedImpact",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub estimated_impact: Vec<OperationImpact>,
     #[doc = "The values reported after index action is complete."]
-    #[serde(rename = "reportedImpact", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reportedImpact",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reported_impact: Vec<OperationImpact>,
 }
 impl RecommendedIndexProperties {
@@ -8696,7 +9043,11 @@ impl RecoverableManagedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoverableManagedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoverableManagedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8749,7 +9100,11 @@ impl ReplicationLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationLinkListResult {
     #[doc = "The list of database replication links housed in the database."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationLink>,
 }
 impl azure_core::Continuable for ReplicationLinkListResult {
@@ -9048,7 +9403,11 @@ impl RestorableDroppedManagedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableDroppedManagedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableDroppedManagedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9107,7 +9466,11 @@ impl RestorePoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorePoint>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9162,10 +9525,20 @@ pub struct SecurityAlertPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled or a policy has not been applied yet on the specific database."]
     pub state: security_alert_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly, Data_Exfiltration, Unsafe_Action"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -9225,7 +9598,11 @@ impl SensitivityLabel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SensitivityLabelListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SensitivityLabel>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9364,7 +9741,11 @@ impl ServerBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9396,7 +9777,12 @@ pub struct ServerBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -9459,7 +9845,11 @@ impl ServerCommunicationLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerCommunicationLinkListResult {
     #[doc = "The list of server communication links."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerCommunicationLink>,
 }
 impl azure_core::Continuable for ServerCommunicationLinkListResult {
@@ -9563,7 +9953,11 @@ impl ServerDnsAliasAcquisition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerDnsAliasListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerDnsAlias>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9628,7 +10022,11 @@ impl ServerKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerKeyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerKey>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9719,7 +10117,11 @@ pub mod server_key_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9770,7 +10172,12 @@ pub struct ServerProperties {
     #[serde(rename = "fullyQualifiedDomainName", default, skip_serializing_if = "Option::is_none")]
     pub fully_qualified_domain_name: Option<String>,
     #[doc = "List of private endpoint connections on a server"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ServerPrivateEndpointConnection>,
     #[doc = "Minimal TLS version. Allowed values: '1.0', '1.1', '1.2'"]
     #[serde(rename = "minimalTlsVersion", default, skip_serializing_if = "Option::is_none")]
@@ -9856,7 +10263,11 @@ impl ServerTrustGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerTrustGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerTrustGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9960,10 +10371,20 @@ pub struct ServerVersionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported database editions."]
-    #[serde(rename = "supportedEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_editions: Vec<EditionCapability>,
     #[doc = "The list of supported elastic pool editions."]
-    #[serde(rename = "supportedElasticPoolEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedElasticPoolEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_elastic_pool_editions: Vec<ElasticPoolEditionCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10006,7 +10427,11 @@ impl ServerVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10073,7 +10498,12 @@ pub struct ServiceObjectiveCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported maximum database sizes."]
-    #[serde(rename = "supportedMaxSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaxSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_max_sizes: Vec<MaxSizeRangeCapability>,
     #[doc = "The performance level capability."]
     #[serde(rename = "performanceLevel", default, skip_serializing_if = "Option::is_none")]
@@ -10082,7 +10512,12 @@ pub struct ServiceObjectiveCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<Sku>,
     #[doc = "List of supported license types."]
-    #[serde(rename = "supportedLicenseTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLicenseTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_license_types: Vec<LicenseTypeCapability>,
     #[doc = "The maximum size capability."]
     #[serde(rename = "includedMaxSize", default, skip_serializing_if = "Option::is_none")]
@@ -10094,7 +10529,12 @@ pub struct ServiceObjectiveCapability {
     #[serde(rename = "supportedAutoPauseDelay", default, skip_serializing_if = "Option::is_none")]
     pub supported_auto_pause_delay: Option<AutoPauseDelayTimeRange>,
     #[doc = "List of supported min capacities"]
-    #[serde(rename = "supportedMinCapacities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMinCapacities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_min_capacities: Vec<MinCapacityCapability>,
     #[doc = "The compute model"]
     #[serde(rename = "computeModel", default, skip_serializing_if = "Option::is_none")]
@@ -10219,7 +10659,12 @@ pub struct ServiceTierAdvisorProperties {
     #[serde(rename = "maxSizeInGB", default, skip_serializing_if = "Option::is_none")]
     pub max_size_in_gb: Option<f64>,
     #[doc = "Gets or sets serviceLevelObjectiveUsageMetrics for the service tier advisor."]
-    #[serde(rename = "serviceLevelObjectiveUsageMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceLevelObjectiveUsageMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_level_objective_usage_metrics: Vec<SloUsageMetric>,
     #[doc = "Gets or sets currentServiceLevelObjective for service tier advisor."]
     #[serde(rename = "currentServiceLevelObjective", default, skip_serializing_if = "Option::is_none")]
@@ -10599,7 +11044,11 @@ impl SubscriptionUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionUsageListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionUsage>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10681,7 +11130,11 @@ impl SyncAgentLinkedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncAgentLinkedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncAgentLinkedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10769,7 +11222,11 @@ pub mod sync_agent_linked_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncAgentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncAgent>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10862,7 +11319,11 @@ pub mod sync_agent_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncDatabaseIdListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncDatabaseIdProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10895,7 +11356,11 @@ impl SyncDatabaseIdProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncFullSchemaProperties {
     #[doc = "List of tables in the database full schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<SyncFullSchemaTable>,
     #[doc = "Last update time of the database schema."]
     #[serde(rename = "lastUpdateTime", default, with = "azure_core::date::rfc3339::option")]
@@ -10910,7 +11375,11 @@ impl SyncFullSchemaProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncFullSchemaPropertiesListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncFullSchemaProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10931,7 +11400,11 @@ impl SyncFullSchemaPropertiesListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncFullSchemaTable {
     #[doc = "List of columns in the table of database full schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<SyncFullSchemaTableColumn>,
     #[doc = "Error id of the table."]
     #[serde(rename = "errorId", default, skip_serializing_if = "Option::is_none")]
@@ -10999,7 +11472,11 @@ impl SyncGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11020,7 +11497,11 @@ impl SyncGroupListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupLogListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncGroupLogProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11234,7 +11715,11 @@ pub mod sync_group_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupSchema {
     #[doc = "List of tables in sync group schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<SyncGroupSchemaTable>,
     #[doc = "Name of master sync member where the schema is from."]
     #[serde(rename = "masterSyncMemberName", default, skip_serializing_if = "Option::is_none")]
@@ -11249,7 +11734,11 @@ impl SyncGroupSchema {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupSchemaTable {
     #[doc = "List of columns in sync group schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<SyncGroupSchemaTableColumn>,
     #[doc = "Quoted name of sync group schema table."]
     #[serde(rename = "quotedName", default, skip_serializing_if = "Option::is_none")]
@@ -11296,7 +11785,11 @@ impl SyncMember {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncMemberListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncMember>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11559,7 +12052,11 @@ pub struct TopQueries {
     #[serde(rename = "endTime", default, skip_serializing_if = "Option::is_none")]
     pub end_time: Option<String>,
     #[doc = "List of top resource consuming queries with appropriate metric data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub queries: Vec<QueryStatisticsProperties>,
 }
 impl TopQueries {
@@ -11613,7 +12110,11 @@ pub mod top_queries {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopQueriesListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TopQueries>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11865,7 +12366,11 @@ impl Usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11903,7 +12408,11 @@ impl VirtualCluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualClusterListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualCluster>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11930,7 +12439,12 @@ pub struct VirtualClusterProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub family: Option<String>,
     #[doc = "List of resources in this virtual cluster."]
-    #[serde(rename = "childResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_resources: Vec<String>,
 }
 impl VirtualClusterProperties {
@@ -11971,7 +12485,11 @@ impl VirtualNetworkRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkRuleListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkRule>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12066,7 +12584,11 @@ pub struct VulnerabilityAssessmentRecurringScansProperties {
     #[serde(rename = "emailSubscriptionAdmins", default, skip_serializing_if = "Option::is_none")]
     pub email_subscription_admins: Option<bool>,
     #[doc = "Specifies an array of e-mail addresses to which the scan notification is sent."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
 }
 impl VulnerabilityAssessmentRecurringScansProperties {
@@ -12107,7 +12629,11 @@ impl VulnerabilityAssessmentScanRecord {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VulnerabilityAssessmentScanRecordListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VulnerabilityAssessmentScanRecord>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12143,7 +12669,11 @@ pub struct VulnerabilityAssessmentScanRecordProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The scan errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<VulnerabilityAssessmentScanError>,
     #[doc = "The scan results storage container path."]
     #[serde(rename = "storageContainerPath", default, skip_serializing_if = "Option::is_none")]
@@ -12256,7 +12786,11 @@ impl WorkloadClassifier {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadClassifierListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadClassifier>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12325,7 +12859,11 @@ impl WorkloadGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/sql/src/package_composite_v4/models.rs b/services/mgmt/sql/src/package_composite_v4/models.rs
index b9fa7df73f..06b8553405 100644
--- a/services/mgmt/sql/src/package_composite_v4/models.rs
+++ b/services/mgmt/sql/src/package_composite_v4/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdministratorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerAzureAdAdministrator>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -286,7 +290,11 @@ pub mod automatic_tuning_server_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureAdOnlyAuthListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerAzureAdOnlyAuthentication>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -335,7 +343,11 @@ impl BackupShortTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupShortTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupShortTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -619,7 +631,11 @@ impl DataMaskingRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataMaskingRuleListResult {
     #[doc = "The list of database data masking rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataMaskingRule>,
 }
 impl azure_core::Continuable for DataMaskingRuleListResult {
@@ -818,7 +834,11 @@ impl DatabaseBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -850,7 +870,12 @@ pub struct DatabaseBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -893,7 +918,11 @@ pub mod database_blob_auditing_policy_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -928,7 +957,11 @@ impl DatabaseOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1733,7 +1766,11 @@ impl DatabaseVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1841,7 +1878,12 @@ pub struct EditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported service objectives for the edition."]
-    #[serde(rename = "supportedServiceLevelObjectives", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServiceLevelObjectives",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_service_level_objectives: Vec<ServiceObjectiveCapability>,
     #[doc = "Whether or not zone redundancy is supported for the edition."]
     #[serde(rename = "zoneRedundant", default, skip_serializing_if = "Option::is_none")]
@@ -1850,7 +1892,12 @@ pub struct EditionCapability {
     #[serde(rename = "readScale", default, skip_serializing_if = "Option::is_none")]
     pub read_scale: Option<ReadScaleCapability>,
     #[doc = "The list of supported storage capabilities for this edition"]
-    #[serde(rename = "supportedStorageCapabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageCapabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_capabilities: Vec<StorageCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2098,7 +2145,12 @@ pub struct ElasticPoolEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported elastic pool DTU levels for the edition."]
-    #[serde(rename = "supportedElasticPoolPerformanceLevels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedElasticPoolPerformanceLevels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_elastic_pool_performance_levels: Vec<ElasticPoolPerformanceLevelCapability>,
     #[doc = "Whether or not zone redundancy is supported for the edition."]
     #[serde(rename = "zoneRedundant", default, skip_serializing_if = "Option::is_none")]
@@ -2130,7 +2182,11 @@ pub mod elastic_pool_edition_capability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ElasticPoolListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ElasticPool>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2165,7 +2221,11 @@ impl ElasticPoolOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ElasticPoolOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ElasticPoolOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2246,6 +2306,7 @@ pub struct ElasticPoolPerDatabaseMaxPerformanceLevelCapability {
     #[serde(
         rename = "supportedPerDatabaseMinPerformanceLevels",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub supported_per_database_min_performance_levels: Vec<ElasticPoolPerDatabaseMinPerformanceLevelCapability>,
@@ -2405,7 +2466,12 @@ pub struct ElasticPoolPerformanceLevelCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<Sku>,
     #[doc = "List of supported license types."]
-    #[serde(rename = "supportedLicenseTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLicenseTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_license_types: Vec<LicenseTypeCapability>,
     #[doc = "The maximum number of databases supported."]
     #[serde(rename = "maxDatabaseCount", default, skip_serializing_if = "Option::is_none")]
@@ -2414,15 +2480,26 @@ pub struct ElasticPoolPerformanceLevelCapability {
     #[serde(rename = "includedMaxSize", default, skip_serializing_if = "Option::is_none")]
     pub included_max_size: Option<MaxSizeCapability>,
     #[doc = "The list of supported max sizes."]
-    #[serde(rename = "supportedMaxSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaxSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_max_sizes: Vec<MaxSizeRangeCapability>,
     #[doc = "The list of supported per database max sizes."]
-    #[serde(rename = "supportedPerDatabaseMaxSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedPerDatabaseMaxSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_per_database_max_sizes: Vec<MaxSizeRangeCapability>,
     #[doc = "The list of supported per database max performance levels."]
     #[serde(
         rename = "supportedPerDatabaseMaxPerformanceLevels",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub supported_per_database_max_performance_levels: Vec<ElasticPoolPerDatabaseMaxPerformanceLevelCapability>,
@@ -2430,7 +2507,12 @@ pub struct ElasticPoolPerformanceLevelCapability {
     #[serde(rename = "zoneRedundant", default, skip_serializing_if = "Option::is_none")]
     pub zone_redundant: Option<bool>,
     #[doc = "List of supported maintenance configurations"]
-    #[serde(rename = "supportedMaintenanceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaintenanceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_maintenance_configurations: Vec<MaintenanceConfigurationCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2670,7 +2752,11 @@ impl EncryptionProtector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EncryptionProtectorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EncryptionProtector>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2859,7 +2945,11 @@ impl ExtendedDatabaseBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtendedDatabaseBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtendedDatabaseBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2894,7 +2984,12 @@ pub struct ExtendedDatabaseBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -2952,7 +3047,11 @@ impl ExtendedServerBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtendedServerBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtendedServerBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2987,7 +3086,12 @@ pub struct ExtendedServerBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -3051,7 +3155,11 @@ impl FailoverGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FailoverGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FailoverGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3087,7 +3195,11 @@ pub struct FailoverGroupProperties {
     #[serde(rename = "partnerServers")]
     pub partner_servers: Vec<PartnerInfo>,
     #[doc = "List of databases in the failover group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
 }
 impl FailoverGroupProperties {
@@ -3281,7 +3393,11 @@ pub struct FailoverGroupUpdateProperties {
     #[serde(rename = "readOnlyEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub read_only_endpoint: Option<FailoverGroupReadOnlyEndpoint>,
     #[doc = "List of databases in the failover group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
 }
 impl FailoverGroupUpdateProperties {
@@ -3316,7 +3432,11 @@ impl FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "The list of server firewall rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
 }
 impl azure_core::Continuable for FirewallRuleListResult {
@@ -3376,7 +3496,11 @@ impl GeoBackupPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GeoBackupPolicyListResult {
     #[doc = "The list of geo backup policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GeoBackupPolicy>,
 }
 impl azure_core::Continuable for GeoBackupPolicyListResult {
@@ -3542,7 +3666,12 @@ pub struct ImportExportOperationResultProperties {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "Gets the status of private endpoints associated with this request."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionRequestStatus>,
 }
 impl ImportExportOperationResultProperties {
@@ -3668,7 +3797,11 @@ impl InstanceFailoverGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstanceFailoverGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InstanceFailoverGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3905,7 +4038,12 @@ pub struct InstancePoolEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The supported families."]
-    #[serde(rename = "supportedFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_families: Vec<InstancePoolFamilyCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3937,10 +4075,20 @@ pub struct InstancePoolFamilyCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of supported license types."]
-    #[serde(rename = "supportedLicenseTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLicenseTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_license_types: Vec<LicenseTypeCapability>,
     #[doc = "List of supported virtual cores values."]
-    #[serde(rename = "supportedVcoresValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedVcoresValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_vcores_values: Vec<InstancePoolVcoresCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3969,7 +4117,11 @@ pub mod instance_pool_family_capability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstancePoolListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InstancePool>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4134,7 +4286,11 @@ impl JobAgent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobAgentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobAgent>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4242,7 +4398,11 @@ impl JobCredential {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCredentialListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobCredential>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4290,7 +4450,11 @@ impl JobExecution {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobExecutionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobExecution>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4522,7 +4686,11 @@ pub mod job_execution_target {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4741,7 +4909,11 @@ impl JobStepExecutionOptions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobStepListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobStep>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4987,7 +5159,11 @@ impl JobTargetGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobTargetGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobTargetGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5030,7 +5206,11 @@ impl JobVersion {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobVersionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobVersion>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5083,10 +5263,20 @@ pub struct LocationCapabilities {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported server versions."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
     #[doc = "The list of supported managed instance versions."]
-    #[serde(rename = "supportedManagedInstanceVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedManagedInstanceVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_managed_instance_versions: Vec<ManagedInstanceVersionCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5176,7 +5366,11 @@ pub mod log_size_capability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogicalServerSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5211,7 +5405,11 @@ impl LongTermRetentionBackup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LongTermRetentionBackupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LongTermRetentionBackup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5446,7 +5644,11 @@ impl LongTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LongTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LongTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5513,7 +5715,11 @@ impl ManagedBackupShortTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedBackupShortTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedBackupShortTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5563,7 +5769,11 @@ impl ManagedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5795,7 +6005,12 @@ pub struct ManagedDatabaseRestoreDetailsProperties {
     #[serde(rename = "percentCompleted", default, skip_serializing_if = "Option::is_none")]
     pub percent_completed: Option<f64>,
     #[doc = "List of unrestorable files."]
-    #[serde(rename = "unrestorableFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "unrestorableFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unrestorable_files: Vec<String>,
     #[doc = "Number of files detected."]
     #[serde(rename = "numberOfFilesDetected", default, skip_serializing_if = "Option::is_none")]
@@ -5847,7 +6062,11 @@ impl ManagedDatabaseSecurityAlertPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedDatabaseSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedDatabaseSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5922,7 +6141,11 @@ impl ManagedInstanceAdministrator {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceAdministratorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceAdministrator>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6005,7 +6228,11 @@ pub mod managed_instance_administrator_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceAzureAdOnlyAuthListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceAzureAdOnlyAuthentication>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6057,10 +6284,20 @@ pub struct ManagedInstanceEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The supported families."]
-    #[serde(rename = "supportedFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_families: Vec<ManagedInstanceFamilyCapability>,
     #[doc = "The list of supported storage capabilities for this edition"]
-    #[serde(rename = "supportedStorageCapabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageCapabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_capabilities: Vec<StorageCapability>,
     #[doc = "Whether or not zone redundancy is supported for the edition."]
     #[serde(rename = "zoneRedundant", default, skip_serializing_if = "Option::is_none")]
@@ -6109,7 +6346,11 @@ impl ManagedInstanceEncryptionProtector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceEncryptionProtectorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceEncryptionProtector>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6202,10 +6443,20 @@ pub struct ManagedInstanceFamilyCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<String>,
     #[doc = "List of supported license types."]
-    #[serde(rename = "supportedLicenseTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLicenseTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_license_types: Vec<LicenseTypeCapability>,
     #[doc = "List of supported virtual cores values."]
-    #[serde(rename = "supportedVcoresValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedVcoresValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_vcores_values: Vec<ManagedInstanceVcoresCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6251,7 +6502,11 @@ impl ManagedInstanceKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceKeyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceKey>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6338,7 +6593,11 @@ pub mod managed_instance_key_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6373,7 +6632,11 @@ impl ManagedInstanceLongTermRetentionBackup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceLongTermRetentionBackupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceLongTermRetentionBackup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6435,7 +6698,11 @@ impl ManagedInstanceLongTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceLongTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceLongTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6499,7 +6766,11 @@ impl ManagedInstanceOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6641,7 +6912,12 @@ pub struct ManagedInstanceOperationSteps {
     #[serde(rename = "currentStep", default, skip_serializing_if = "Option::is_none")]
     pub current_step: Option<i32>,
     #[doc = "The operation steps list."]
-    #[serde(rename = "stepsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "stepsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub steps_list: Vec<UpsertManagedServerOperationStep>,
 }
 impl ManagedInstanceOperationSteps {
@@ -6788,7 +7064,12 @@ pub struct ManagedInstanceProperties {
     #[serde(rename = "maintenanceConfigurationId", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_configuration_id: Option<String>,
     #[doc = "List of private endpoint connections on a managed instance."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ManagedInstancePecProperty>,
     #[doc = "Minimal TLS version. Allowed values: 'None', '1.0', '1.1', '1.2'"]
     #[serde(rename = "minimalTlsVersion", default, skip_serializing_if = "Option::is_none")]
@@ -7006,7 +7287,12 @@ pub struct ManagedInstanceVcoresCapability {
     #[serde(rename = "includedMaxSize", default, skip_serializing_if = "Option::is_none")]
     pub included_max_size: Option<MaxSizeCapability>,
     #[doc = "Storage size ranges."]
-    #[serde(rename = "supportedStorageSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_sizes: Vec<MaxSizeRangeCapability>,
     #[doc = "True if this service objective is supported for managed instances in an instance pool."]
     #[serde(rename = "instancePoolSupported", default, skip_serializing_if = "Option::is_none")]
@@ -7015,7 +7301,12 @@ pub struct ManagedInstanceVcoresCapability {
     #[serde(rename = "standaloneSupported", default, skip_serializing_if = "Option::is_none")]
     pub standalone_supported: Option<bool>,
     #[doc = "List of supported maintenance configurations"]
-    #[serde(rename = "supportedMaintenanceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaintenanceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_maintenance_configurations: Vec<ManagedInstanceMaintenanceConfigurationCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7047,10 +7338,20 @@ pub struct ManagedInstanceVersionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported managed instance editions."]
-    #[serde(rename = "supportedEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_editions: Vec<ManagedInstanceEditionCapability>,
     #[doc = "The list of supported instance pool editions."]
-    #[serde(rename = "supportedInstancePoolEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedInstancePoolEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_instance_pool_editions: Vec<InstancePoolEditionCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7093,7 +7394,11 @@ impl ManagedInstanceVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7154,7 +7459,11 @@ impl ManagedServerSecurityAlertPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedServerSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedServerSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7287,7 +7596,12 @@ pub struct Metric {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<MetricName>,
     #[doc = "The metric values for the specified time window and timestep."]
-    #[serde(rename = "metricValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_values: Vec<MetricValue>,
 }
 impl Metric {
@@ -7380,7 +7694,12 @@ pub struct MetricDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<metric_definition::Unit>,
     #[doc = "The list of database metric availabilities for the metric."]
-    #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricAvailabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_availabilities: Vec<MetricAvailability>,
 }
 impl MetricDefinition {
@@ -7725,7 +8044,11 @@ impl OperationImpact {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7932,7 +8255,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8058,7 +8385,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8082,7 +8413,12 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -8212,7 +8548,11 @@ pub struct QueryMetricInterval {
     #[serde(rename = "executionCount", default, skip_serializing_if = "Option::is_none")]
     pub execution_count: Option<i64>,
     #[doc = "List of metric objects for this interval"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<QueryMetricProperties>,
 }
 impl QueryMetricInterval {
@@ -8362,7 +8702,11 @@ pub struct QueryStatisticsProperties {
     #[serde(rename = "endTime", default, skip_serializing_if = "Option::is_none")]
     pub end_time: Option<String>,
     #[doc = "List of intervals with appropriate metric data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub intervals: Vec<QueryMetricInterval>,
 }
 impl QueryStatisticsProperties {
@@ -8496,10 +8840,18 @@ pub struct RecommendedElasticPoolProperties {
     #[serde(rename = "maxObservedStorageMB", default, skip_serializing_if = "Option::is_none")]
     pub max_observed_storage_mb: Option<f64>,
     #[doc = "The list of databases in this pool. Expanded property"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<TrackedResource>,
     #[doc = "The list of databases housed in the server. Expanded property"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<RecommendedElasticPoolMetric>,
 }
 impl RecommendedElasticPoolProperties {
@@ -8592,19 +8944,38 @@ pub struct RecommendedIndexProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub table: Option<String>,
     #[doc = "Columns over which to build index"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<String>,
     #[doc = "The list of column names to be included in the index"]
-    #[serde(rename = "includedColumns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedColumns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_columns: Vec<String>,
     #[doc = "The full build index script"]
     #[serde(rename = "indexScript", default, skip_serializing_if = "Option::is_none")]
     pub index_script: Option<String>,
     #[doc = "The estimated impact of doing recommended index action."]
-    #[serde(rename = "estimatedImpact", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "estimatedImpact",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub estimated_impact: Vec<OperationImpact>,
     #[doc = "The values reported after index action is complete."]
-    #[serde(rename = "reportedImpact", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reportedImpact",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reported_impact: Vec<OperationImpact>,
 }
 impl RecommendedIndexProperties {
@@ -8720,7 +9091,11 @@ impl RecoverableManagedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoverableManagedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoverableManagedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8773,7 +9148,11 @@ impl ReplicationLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationLinkListResult {
     #[doc = "The list of database replication links housed in the database."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationLink>,
 }
 impl azure_core::Continuable for ReplicationLinkListResult {
@@ -9072,7 +9451,11 @@ impl RestorableDroppedManagedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableDroppedManagedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableDroppedManagedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9131,7 +9514,11 @@ impl RestorePoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorePoint>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9186,10 +9573,20 @@ pub struct SecurityAlertPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled or a policy has not been applied yet on the specific database."]
     pub state: security_alert_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly, Data_Exfiltration, Unsafe_Action"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -9249,7 +9646,11 @@ impl SensitivityLabel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SensitivityLabelListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SensitivityLabel>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9388,7 +9789,11 @@ impl ServerBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9420,7 +9825,12 @@ pub struct ServerBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -9483,7 +9893,11 @@ impl ServerCommunicationLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerCommunicationLinkListResult {
     #[doc = "The list of server communication links."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerCommunicationLink>,
 }
 impl azure_core::Continuable for ServerCommunicationLinkListResult {
@@ -9561,7 +9975,11 @@ pub mod server_connection_policy_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerDevOpsAuditSettingsListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerDevOpsAuditingSettings>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9663,7 +10081,11 @@ impl ServerDnsAliasAcquisition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerDnsAliasListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerDnsAlias>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9728,7 +10150,11 @@ impl ServerKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerKeyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerKey>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9819,7 +10245,11 @@ pub mod server_key_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9870,7 +10300,12 @@ pub struct ServerProperties {
     #[serde(rename = "fullyQualifiedDomainName", default, skip_serializing_if = "Option::is_none")]
     pub fully_qualified_domain_name: Option<String>,
     #[doc = "List of private endpoint connections on a server"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ServerPrivateEndpointConnection>,
     #[doc = "Minimal TLS version. Allowed values: '1.0', '1.1', '1.2'"]
     #[serde(rename = "minimalTlsVersion", default, skip_serializing_if = "Option::is_none")]
@@ -9956,7 +10391,11 @@ impl ServerTrustGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerTrustGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerTrustGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10060,10 +10499,20 @@ pub struct ServerVersionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported database editions."]
-    #[serde(rename = "supportedEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_editions: Vec<EditionCapability>,
     #[doc = "The list of supported elastic pool editions."]
-    #[serde(rename = "supportedElasticPoolEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedElasticPoolEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_elastic_pool_editions: Vec<ElasticPoolEditionCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10106,7 +10555,11 @@ impl ServerVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10173,7 +10626,12 @@ pub struct ServiceObjectiveCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported maximum database sizes."]
-    #[serde(rename = "supportedMaxSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaxSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_max_sizes: Vec<MaxSizeRangeCapability>,
     #[doc = "The performance level capability."]
     #[serde(rename = "performanceLevel", default, skip_serializing_if = "Option::is_none")]
@@ -10182,7 +10640,12 @@ pub struct ServiceObjectiveCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<Sku>,
     #[doc = "List of supported license types."]
-    #[serde(rename = "supportedLicenseTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLicenseTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_license_types: Vec<LicenseTypeCapability>,
     #[doc = "The maximum size capability."]
     #[serde(rename = "includedMaxSize", default, skip_serializing_if = "Option::is_none")]
@@ -10194,13 +10657,23 @@ pub struct ServiceObjectiveCapability {
     #[serde(rename = "supportedAutoPauseDelay", default, skip_serializing_if = "Option::is_none")]
     pub supported_auto_pause_delay: Option<AutoPauseDelayTimeRange>,
     #[doc = "List of supported min capacities"]
-    #[serde(rename = "supportedMinCapacities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMinCapacities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_min_capacities: Vec<MinCapacityCapability>,
     #[doc = "The compute model"]
     #[serde(rename = "computeModel", default, skip_serializing_if = "Option::is_none")]
     pub compute_model: Option<String>,
     #[doc = "List of supported maintenance configurations"]
-    #[serde(rename = "supportedMaintenanceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaintenanceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_maintenance_configurations: Vec<MaintenanceConfigurationCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10322,7 +10795,12 @@ pub struct ServiceTierAdvisorProperties {
     #[serde(rename = "maxSizeInGB", default, skip_serializing_if = "Option::is_none")]
     pub max_size_in_gb: Option<f64>,
     #[doc = "Gets or sets serviceLevelObjectiveUsageMetrics for the service tier advisor."]
-    #[serde(rename = "serviceLevelObjectiveUsageMetrics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceLevelObjectiveUsageMetrics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_level_objective_usage_metrics: Vec<SloUsageMetric>,
     #[doc = "Gets or sets currentServiceLevelObjective for service tier advisor."]
     #[serde(rename = "currentServiceLevelObjective", default, skip_serializing_if = "Option::is_none")]
@@ -10702,7 +11180,11 @@ impl SubscriptionUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionUsageListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionUsage>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10784,7 +11266,11 @@ impl SyncAgentLinkedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncAgentLinkedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncAgentLinkedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10872,7 +11358,11 @@ pub mod sync_agent_linked_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncAgentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncAgent>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10965,7 +11455,11 @@ pub mod sync_agent_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncDatabaseIdListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncDatabaseIdProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10998,7 +11492,11 @@ impl SyncDatabaseIdProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncFullSchemaProperties {
     #[doc = "List of tables in the database full schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<SyncFullSchemaTable>,
     #[doc = "Last update time of the database schema."]
     #[serde(rename = "lastUpdateTime", default, with = "azure_core::date::rfc3339::option")]
@@ -11013,7 +11511,11 @@ impl SyncFullSchemaProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncFullSchemaPropertiesListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncFullSchemaProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11034,7 +11536,11 @@ impl SyncFullSchemaPropertiesListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncFullSchemaTable {
     #[doc = "List of columns in the table of database full schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<SyncFullSchemaTableColumn>,
     #[doc = "Error id of the table."]
     #[serde(rename = "errorId", default, skip_serializing_if = "Option::is_none")]
@@ -11102,7 +11608,11 @@ impl SyncGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11123,7 +11633,11 @@ impl SyncGroupListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupLogListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncGroupLogProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11337,7 +11851,11 @@ pub mod sync_group_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupSchema {
     #[doc = "List of tables in sync group schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<SyncGroupSchemaTable>,
     #[doc = "Name of master sync member where the schema is from."]
     #[serde(rename = "masterSyncMemberName", default, skip_serializing_if = "Option::is_none")]
@@ -11352,7 +11870,11 @@ impl SyncGroupSchema {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupSchemaTable {
     #[doc = "List of columns in sync group schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<SyncGroupSchemaTableColumn>,
     #[doc = "Quoted name of sync group schema table."]
     #[serde(rename = "quotedName", default, skip_serializing_if = "Option::is_none")]
@@ -11399,7 +11921,11 @@ impl SyncMember {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncMemberListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncMember>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11662,7 +12188,11 @@ pub struct TopQueries {
     #[serde(rename = "endTime", default, skip_serializing_if = "Option::is_none")]
     pub end_time: Option<String>,
     #[doc = "List of top resource consuming queries with appropriate metric data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub queries: Vec<QueryStatisticsProperties>,
 }
 impl TopQueries {
@@ -11716,7 +12246,11 @@ pub mod top_queries {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopQueriesListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TopQueries>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12035,7 +12569,11 @@ impl Usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12073,7 +12611,11 @@ impl VirtualCluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualClusterListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualCluster>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12100,7 +12642,12 @@ pub struct VirtualClusterProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub family: Option<String>,
     #[doc = "List of resources in this virtual cluster."]
-    #[serde(rename = "childResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_resources: Vec<String>,
 }
 impl VirtualClusterProperties {
@@ -12141,7 +12688,11 @@ impl VirtualNetworkRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkRuleListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkRule>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12236,7 +12787,11 @@ pub struct VulnerabilityAssessmentRecurringScansProperties {
     #[serde(rename = "emailSubscriptionAdmins", default, skip_serializing_if = "Option::is_none")]
     pub email_subscription_admins: Option<bool>,
     #[doc = "Specifies an array of e-mail addresses to which the scan notification is sent."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
 }
 impl VulnerabilityAssessmentRecurringScansProperties {
@@ -12277,7 +12832,11 @@ impl VulnerabilityAssessmentScanRecord {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VulnerabilityAssessmentScanRecordListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VulnerabilityAssessmentScanRecord>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12313,7 +12872,11 @@ pub struct VulnerabilityAssessmentScanRecordProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The scan errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<VulnerabilityAssessmentScanError>,
     #[doc = "The scan results storage container path."]
     #[serde(rename = "storageContainerPath", default, skip_serializing_if = "Option::is_none")]
@@ -12426,7 +12989,11 @@ impl WorkloadClassifier {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadClassifierListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadClassifier>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12495,7 +13062,11 @@ impl WorkloadGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/sql/src/package_composite_v5/models.rs b/services/mgmt/sql/src/package_composite_v5/models.rs
index 6741d1b779..a75e4064ee 100644
--- a/services/mgmt/sql/src/package_composite_v5/models.rs
+++ b/services/mgmt/sql/src/package_composite_v5/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdministratorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerAzureAdAdministrator>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -156,7 +160,12 @@ pub struct AdvisorProperties {
     #[serde(rename = "lastChecked", default, with = "azure_core::date::rfc3339::option")]
     pub last_checked: Option<time::OffsetDateTime>,
     #[doc = "Gets the recommended actions for this advisor."]
-    #[serde(rename = "recommendedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recommendedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommended_actions: Vec<RecommendedAction>,
 }
 impl AdvisorProperties {
@@ -395,7 +404,11 @@ pub mod automatic_tuning_server_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureAdOnlyAuthListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerAzureAdOnlyAuthentication>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -444,7 +457,11 @@ impl BackupShortTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupShortTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupShortTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -543,7 +560,12 @@ impl BaseLongTermRetentionPolicyProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Baseline {
     #[doc = "SQL Vulnerability Assessment baseline expected results"]
-    #[serde(rename = "expectedResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "expectedResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub expected_results: Vec<Vec<String>>,
     #[doc = "SQL Vulnerability Assessment baseline update time (UTC)"]
     #[serde(rename = "updatedTime", default, with = "azure_core::date::rfc3339::option")]
@@ -564,10 +586,20 @@ pub struct BaselineAdjustedResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<baseline_adjusted_result::Status>,
     #[doc = "SQL Vulnerability Assessment results that are not in baseline"]
-    #[serde(rename = "resultsNotInBaseline", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resultsNotInBaseline",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub results_not_in_baseline: Vec<Vec<String>>,
     #[doc = "SQL Vulnerability Assessment results that are in baseline."]
-    #[serde(rename = "resultsOnlyInBaseline", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resultsOnlyInBaseline",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub results_only_in_baseline: Vec<Vec<String>>,
 }
 impl BaselineAdjustedResult {
@@ -868,7 +900,11 @@ impl DataMaskingRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataMaskingRuleListResult {
     #[doc = "The list of database data masking rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataMaskingRule>,
 }
 impl azure_core::Continuable for DataMaskingRuleListResult {
@@ -984,7 +1020,11 @@ impl DataWarehouseUserActivities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataWarehouseUserActivitiesListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataWarehouseUserActivities>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1067,7 +1107,11 @@ impl DatabaseAdvancedThreatProtection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseAdvancedThreatProtectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseAdvancedThreatProtection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1156,7 +1200,11 @@ impl DatabaseBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1180,7 +1228,12 @@ pub struct DatabaseBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\nLEDGER_OPERATION_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies whether storageAccountAccessKey value is the storage's secondary key."]
     #[serde(rename = "isStorageSecondaryKeyInUse", default, skip_serializing_if = "Option::is_none")]
@@ -1249,7 +1302,11 @@ impl DatabaseColumn {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseColumnListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseColumn>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1648,7 +1705,11 @@ pub mod database_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1683,7 +1744,11 @@ impl DatabaseOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2361,7 +2426,11 @@ impl DatabaseSchema {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseSchemaListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseSchema>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2382,7 +2451,11 @@ impl DatabaseSchemaListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseSecurityAlertListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2437,7 +2510,11 @@ impl DatabaseSqlVulnerabilityAssessmentBaselineSet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseSqlVulnerabilityAssessmentBaselineSetListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseSqlVulnerabilityAssessmentBaselineSet>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2548,7 +2625,11 @@ impl DatabaseSqlVulnerabilityAssessmentRuleBaselineListInputProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseSqlVulnerabilityAssessmentRuleBaselineListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseSqlVulnerabilityAssessmentRuleBaseline>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2594,7 +2675,11 @@ impl DatabaseTable {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseTableListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseTable>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3253,7 +3338,11 @@ impl DatabaseUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseUsageListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseUsage>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3324,7 +3413,11 @@ impl DatabaseVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3443,7 +3536,11 @@ impl DeletedServer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedServerListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedServer>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3578,7 +3675,11 @@ pub mod distributed_availability_group_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DistributedAvailabilityGroupsListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DistributedAvailabilityGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3623,7 +3724,12 @@ pub struct EditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported service objectives for the edition."]
-    #[serde(rename = "supportedServiceLevelObjectives", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServiceLevelObjectives",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_service_level_objectives: Vec<ServiceObjectiveCapability>,
     #[doc = "Whether or not zone redundancy is supported for the edition."]
     #[serde(rename = "zoneRedundant", default, skip_serializing_if = "Option::is_none")]
@@ -3632,7 +3738,12 @@ pub struct EditionCapability {
     #[serde(rename = "readScale", default, skip_serializing_if = "Option::is_none")]
     pub read_scale: Option<ReadScaleCapability>,
     #[doc = "The list of supported storage capabilities for this edition"]
-    #[serde(rename = "supportedStorageCapabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageCapabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_capabilities: Vec<StorageCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3880,7 +3991,12 @@ pub struct ElasticPoolEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported elastic pool DTU levels for the edition."]
-    #[serde(rename = "supportedElasticPoolPerformanceLevels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedElasticPoolPerformanceLevels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_elastic_pool_performance_levels: Vec<ElasticPoolPerformanceLevelCapability>,
     #[doc = "Whether or not zone redundancy is supported for the edition."]
     #[serde(rename = "zoneRedundant", default, skip_serializing_if = "Option::is_none")]
@@ -3912,7 +4028,11 @@ pub mod elastic_pool_edition_capability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ElasticPoolListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ElasticPool>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3947,7 +4067,11 @@ impl ElasticPoolOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ElasticPoolOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ElasticPoolOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4028,6 +4152,7 @@ pub struct ElasticPoolPerDatabaseMaxPerformanceLevelCapability {
     #[serde(
         rename = "supportedPerDatabaseMinPerformanceLevels",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub supported_per_database_min_performance_levels: Vec<ElasticPoolPerDatabaseMinPerformanceLevelCapability>,
@@ -4187,7 +4312,12 @@ pub struct ElasticPoolPerformanceLevelCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<Sku>,
     #[doc = "List of supported license types."]
-    #[serde(rename = "supportedLicenseTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLicenseTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_license_types: Vec<LicenseTypeCapability>,
     #[doc = "The maximum number of databases supported."]
     #[serde(rename = "maxDatabaseCount", default, skip_serializing_if = "Option::is_none")]
@@ -4196,15 +4326,26 @@ pub struct ElasticPoolPerformanceLevelCapability {
     #[serde(rename = "includedMaxSize", default, skip_serializing_if = "Option::is_none")]
     pub included_max_size: Option<MaxSizeCapability>,
     #[doc = "The list of supported max sizes."]
-    #[serde(rename = "supportedMaxSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaxSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_max_sizes: Vec<MaxSizeRangeCapability>,
     #[doc = "The list of supported per database max sizes."]
-    #[serde(rename = "supportedPerDatabaseMaxSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedPerDatabaseMaxSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_per_database_max_sizes: Vec<MaxSizeRangeCapability>,
     #[doc = "The list of supported per database max performance levels."]
     #[serde(
         rename = "supportedPerDatabaseMaxPerformanceLevels",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub supported_per_database_max_performance_levels: Vec<ElasticPoolPerDatabaseMaxPerformanceLevelCapability>,
@@ -4212,7 +4353,12 @@ pub struct ElasticPoolPerformanceLevelCapability {
     #[serde(rename = "zoneRedundant", default, skip_serializing_if = "Option::is_none")]
     pub zone_redundant: Option<bool>,
     #[doc = "List of supported maintenance configurations"]
-    #[serde(rename = "supportedMaintenanceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaintenanceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_maintenance_configurations: Vec<MaintenanceConfigurationCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4458,7 +4604,11 @@ impl EncryptionProtector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EncryptionProtectorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EncryptionProtector>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4567,7 +4717,11 @@ impl EndpointCertificate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EndpointCertificateListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EndpointCertificate>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4698,7 +4852,11 @@ impl ExtendedDatabaseBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtendedDatabaseBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtendedDatabaseBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4725,7 +4883,12 @@ pub struct ExtendedDatabaseBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\nLEDGER_OPERATION_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies whether storageAccountAccessKey value is the storage's secondary key."]
     #[serde(rename = "isStorageSecondaryKeyInUse", default, skip_serializing_if = "Option::is_none")]
@@ -4795,7 +4958,11 @@ impl ExtendedServerBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtendedServerBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtendedServerBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4825,7 +4992,12 @@ pub struct ExtendedServerBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\nLEDGER_OPERATION_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies whether storageAccountAccessKey value is the storage's secondary key."]
     #[serde(rename = "isStorageSecondaryKeyInUse", default, skip_serializing_if = "Option::is_none")]
@@ -4902,7 +5074,11 @@ impl FailoverGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FailoverGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FailoverGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4938,7 +5114,11 @@ pub struct FailoverGroupProperties {
     #[serde(rename = "partnerServers")]
     pub partner_servers: Vec<PartnerInfo>,
     #[doc = "List of databases in the failover group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
 }
 impl FailoverGroupProperties {
@@ -5132,7 +5312,11 @@ pub struct FailoverGroupUpdateProperties {
     #[serde(rename = "readOnlyEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub read_only_endpoint: Option<FailoverGroupReadOnlyEndpoint>,
     #[doc = "List of databases in the failover group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
 }
 impl FailoverGroupUpdateProperties {
@@ -5157,7 +5341,11 @@ impl FirewallRule {
 #[doc = "A list of server firewall rules."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<FirewallRule>,
 }
 impl FirewallRuleList {
@@ -5169,7 +5357,11 @@ impl FirewallRuleList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5214,7 +5406,11 @@ impl GeoBackupPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GeoBackupPolicyListResult {
     #[doc = "The list of geo backup policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GeoBackupPolicy>,
 }
 impl azure_core::Continuable for GeoBackupPolicyListResult {
@@ -5269,7 +5465,11 @@ impl IPv6FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IPv6FirewallRuleListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IPv6FirewallRule>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5389,7 +5589,11 @@ pub mod import_existing_database_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImportExportExtensionsOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImportExportExtensionsOperationResult>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5495,7 +5699,12 @@ pub struct ImportExportOperationResultProperties {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "Gets the status of private endpoints associated with this request."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionRequestStatus>,
 }
 impl ImportExportOperationResultProperties {
@@ -5621,7 +5830,11 @@ impl InstanceFailoverGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstanceFailoverGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InstanceFailoverGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5858,7 +6071,12 @@ pub struct InstancePoolEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The supported families."]
-    #[serde(rename = "supportedFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_families: Vec<InstancePoolFamilyCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5890,10 +6108,20 @@ pub struct InstancePoolFamilyCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of supported license types."]
-    #[serde(rename = "supportedLicenseTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLicenseTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_license_types: Vec<LicenseTypeCapability>,
     #[doc = "List of supported virtual cores values."]
-    #[serde(rename = "supportedVcoresValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedVcoresValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_vcores_values: Vec<InstancePoolVcoresCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5922,7 +6150,11 @@ pub mod instance_pool_family_capability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstancePoolListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InstancePool>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6087,7 +6319,11 @@ impl JobAgent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobAgentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobAgent>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6195,7 +6431,11 @@ impl JobCredential {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCredentialListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobCredential>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6243,7 +6483,11 @@ impl JobExecution {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobExecutionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobExecution>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6475,7 +6719,11 @@ pub mod job_execution_target {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6694,7 +6942,11 @@ impl JobStepExecutionOptions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobStepListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobStep>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6940,7 +7192,11 @@ impl JobTargetGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobTargetGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobTargetGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6983,7 +7239,11 @@ impl JobVersion {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobVersionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobVersion>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7018,7 +7278,11 @@ impl LedgerDigestUploads {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LedgerDigestUploadsListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LedgerDigestUploads>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7095,10 +7359,20 @@ pub struct LocationCapabilities {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported server versions."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
     #[doc = "The list of supported managed instance versions."]
-    #[serde(rename = "supportedManagedInstanceVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedManagedInstanceVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_managed_instance_versions: Vec<ManagedInstanceVersionCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7202,7 +7476,11 @@ impl LogicalDatabaseTransparentDataEncryption {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogicalDatabaseTransparentDataEncryptionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogicalDatabaseTransparentDataEncryption>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7223,7 +7501,11 @@ impl LogicalDatabaseTransparentDataEncryptionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogicalServerAdvancedThreatProtectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerAdvancedThreatProtection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7244,7 +7526,11 @@ impl LogicalServerAdvancedThreatProtectionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogicalServerSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7279,7 +7565,11 @@ impl LongTermRetentionBackup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LongTermRetentionBackupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LongTermRetentionBackup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7520,7 +7810,11 @@ impl LongTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LongTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LongTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7590,7 +7884,12 @@ pub struct MaintenanceWindowOptionsProperties {
     #[serde(rename = "isEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_enabled: Option<bool>,
     #[doc = "Available maintenance cycles e.g. {Saturday, 0, 48*60}, {Wednesday, 0, 24*60}."]
-    #[serde(rename = "maintenanceWindowCycles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "maintenanceWindowCycles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub maintenance_window_cycles: Vec<MaintenanceWindowTimeRange>,
     #[doc = "Minimum duration of maintenance window."]
     #[serde(rename = "minDurationInMinutes", default, skip_serializing_if = "Option::is_none")]
@@ -7702,7 +8001,12 @@ impl MaintenanceWindows {
 #[doc = "Maintenance windows resource properties."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MaintenanceWindowsProperties {
-    #[serde(rename = "timeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_ranges: Vec<MaintenanceWindowTimeRange>,
 }
 impl MaintenanceWindowsProperties {
@@ -7728,7 +8032,11 @@ impl ManagedBackupShortTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedBackupShortTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedBackupShortTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7795,7 +8103,11 @@ impl ManagedDatabaseAdvancedThreatProtection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedDatabaseAdvancedThreatProtectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedDatabaseAdvancedThreatProtection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7816,7 +8128,11 @@ impl ManagedDatabaseAdvancedThreatProtectionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8131,16 +8447,36 @@ pub struct ManagedDatabaseRestoreDetailsProperties {
     #[serde(rename = "numberOfFilesUnrestorable", default, skip_serializing_if = "Option::is_none")]
     pub number_of_files_unrestorable: Option<i32>,
     #[doc = "Full backup sets."]
-    #[serde(rename = "fullBackupSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fullBackupSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub full_backup_sets: Vec<ManagedDatabaseRestoreDetailsBackupSetProperties>,
     #[doc = "Diff backup sets."]
-    #[serde(rename = "diffBackupSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diffBackupSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub diff_backup_sets: Vec<ManagedDatabaseRestoreDetailsBackupSetProperties>,
     #[doc = "Log backup sets."]
-    #[serde(rename = "logBackupSets", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logBackupSets",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_backup_sets: Vec<ManagedDatabaseRestoreDetailsBackupSetProperties>,
     #[doc = "Unrestorable files."]
-    #[serde(rename = "unrestorableFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "unrestorableFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unrestorable_files: Vec<ManagedDatabaseRestoreDetailsUnrestorableFileProperties>,
 }
 impl ManagedDatabaseRestoreDetailsProperties {
@@ -8192,7 +8528,11 @@ impl ManagedDatabaseSecurityAlertPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedDatabaseSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedDatabaseSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8330,7 +8670,11 @@ impl ManagedInstanceAdministrator {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceAdministratorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceAdministrator>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8430,7 +8774,11 @@ impl ManagedInstanceAdvancedThreatProtection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceAdvancedThreatProtectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceAdvancedThreatProtection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8451,7 +8799,11 @@ impl ManagedInstanceAdvancedThreatProtectionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceAzureAdOnlyAuthListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceAzureAdOnlyAuthentication>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8514,7 +8866,11 @@ impl ManagedInstanceDtc {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceDtcListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceDtc>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8541,7 +8897,12 @@ pub struct ManagedInstanceDtcProperties {
     #[serde(rename = "securitySettings", default, skip_serializing_if = "Option::is_none")]
     pub security_settings: Option<ManagedInstanceDtcSecuritySettings>,
     #[doc = "External dns suffix search list of managed instance DTC."]
-    #[serde(rename = "externalDnsSuffixSearchList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalDnsSuffixSearchList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_dns_suffix_search_list: Vec<String>,
     #[doc = "Host name dns suffix of managed instance DTC."]
     #[serde(rename = "dtcHostNameDnsSuffix", default, skip_serializing_if = "Option::is_none")]
@@ -8648,10 +9009,20 @@ pub struct ManagedInstanceEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The supported families."]
-    #[serde(rename = "supportedFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_families: Vec<ManagedInstanceFamilyCapability>,
     #[doc = "The list of supported storage capabilities for this edition"]
-    #[serde(rename = "supportedStorageCapabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageCapabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_capabilities: Vec<StorageCapability>,
     #[doc = "Whether or not zone redundancy is supported for the edition."]
     #[serde(rename = "zoneRedundant", default, skip_serializing_if = "Option::is_none")]
@@ -8700,7 +9071,11 @@ impl ManagedInstanceEncryptionProtector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceEncryptionProtectorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceEncryptionProtector>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8901,10 +9276,20 @@ pub struct ManagedInstanceFamilyCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<String>,
     #[doc = "List of supported license types."]
-    #[serde(rename = "supportedLicenseTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLicenseTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_license_types: Vec<LicenseTypeCapability>,
     #[doc = "List of supported virtual cores values."]
-    #[serde(rename = "supportedVcoresValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedVcoresValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_vcores_values: Vec<ManagedInstanceVcoresCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8950,7 +9335,11 @@ impl ManagedInstanceKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceKeyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceKey>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9041,7 +9430,11 @@ pub mod managed_instance_key_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9076,7 +9469,11 @@ impl ManagedInstanceLongTermRetentionBackup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceLongTermRetentionBackupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceLongTermRetentionBackup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9185,7 +9582,11 @@ impl ManagedInstanceLongTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceLongTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceLongTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9249,7 +9650,11 @@ impl ManagedInstanceOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9391,7 +9796,12 @@ pub struct ManagedInstanceOperationSteps {
     #[serde(rename = "currentStep", default, skip_serializing_if = "Option::is_none")]
     pub current_step: Option<i32>,
     #[doc = "The operation steps list."]
-    #[serde(rename = "stepsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "stepsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub steps_list: Vec<UpsertManagedServerOperationStep>,
 }
 impl ManagedInstanceOperationSteps {
@@ -9447,7 +9857,11 @@ impl ManagedInstancePrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstancePrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstancePrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9509,7 +9923,11 @@ impl ManagedInstancePrivateLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstancePrivateLinkListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstancePrivateLink>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9533,7 +9951,12 @@ pub struct ManagedInstancePrivateLinkProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
 }
 impl ManagedInstancePrivateLinkProperties {
@@ -9623,7 +10046,12 @@ pub struct ManagedInstanceProperties {
     #[serde(rename = "maintenanceConfigurationId", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_configuration_id: Option<String>,
     #[doc = "List of private endpoint connections on a managed instance."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ManagedInstancePecProperty>,
     #[doc = "Minimal TLS version. Allowed values: 'None', '1.0', '1.1', '1.2'"]
     #[serde(rename = "minimalTlsVersion", default, skip_serializing_if = "Option::is_none")]
@@ -9889,7 +10317,11 @@ impl ManagedInstanceQuery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceQueryStatistics {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueryStatistics>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9940,7 +10372,12 @@ pub struct ManagedInstanceVcoresCapability {
     #[serde(rename = "includedMaxSize", default, skip_serializing_if = "Option::is_none")]
     pub included_max_size: Option<MaxSizeCapability>,
     #[doc = "Storage size ranges."]
-    #[serde(rename = "supportedStorageSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_sizes: Vec<MaxSizeRangeCapability>,
     #[doc = "True if this service objective is supported for managed instances in an instance pool."]
     #[serde(rename = "instancePoolSupported", default, skip_serializing_if = "Option::is_none")]
@@ -9949,7 +10386,12 @@ pub struct ManagedInstanceVcoresCapability {
     #[serde(rename = "standaloneSupported", default, skip_serializing_if = "Option::is_none")]
     pub standalone_supported: Option<bool>,
     #[doc = "List of supported maintenance configurations"]
-    #[serde(rename = "supportedMaintenanceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaintenanceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_maintenance_configurations: Vec<ManagedInstanceMaintenanceConfigurationCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -9981,10 +10423,20 @@ pub struct ManagedInstanceVersionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported managed instance editions."]
-    #[serde(rename = "supportedEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_editions: Vec<ManagedInstanceEditionCapability>,
     #[doc = "The list of supported instance pool editions."]
-    #[serde(rename = "supportedInstancePoolEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedInstancePoolEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_instance_pool_editions: Vec<InstancePoolEditionCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10027,7 +10479,11 @@ impl ManagedInstanceVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10114,7 +10570,11 @@ impl ManagedServerDnsAliasCreation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedServerDnsAliasListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedServerDnsAlias>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10167,7 +10627,11 @@ impl ManagedServerSecurityAlertPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedServerSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedServerSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10202,7 +10666,11 @@ impl ManagedTransparentDataEncryption {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedTransparentDataEncryptionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedTransparentDataEncryption>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10355,7 +10823,12 @@ pub struct Metric {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<MetricName>,
     #[doc = "The metric values for the specified time window and timestep."]
-    #[serde(rename = "metricValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_values: Vec<MetricValue>,
 }
 impl Metric {
@@ -10448,7 +10921,12 @@ pub struct MetricDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<metric_definition::Unit>,
     #[doc = "The list of database metric availabilities for the metric."]
-    #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricAvailabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_availabilities: Vec<MetricAvailability>,
 }
 impl MetricDefinition {
@@ -10793,7 +11271,11 @@ impl OperationImpact {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10828,7 +11310,11 @@ impl OutboundFirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OutboundFirewallRuleListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OutboundFirewallRule>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11047,7 +11533,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11173,7 +11663,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11197,10 +11691,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource required zone names."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -11335,10 +11839,20 @@ pub struct QueryCheck {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub query: Option<String>,
     #[doc = "SQL Vulnerability Assessment query expected result."]
-    #[serde(rename = "expectedResult", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "expectedResult",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub expected_result: Vec<Vec<String>>,
     #[doc = "SQL Vulnerability Assessment column names of query expected result."]
-    #[serde(rename = "columnNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "columnNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub column_names: Vec<String>,
 }
 impl QueryCheck {
@@ -11359,7 +11873,11 @@ pub struct QueryMetricInterval {
     #[serde(rename = "executionCount", default, skip_serializing_if = "Option::is_none")]
     pub execution_count: Option<i64>,
     #[doc = "List of metric objects for this interval"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<QueryMetricProperties>,
 }
 impl QueryMetricInterval {
@@ -11534,7 +12052,11 @@ pub struct QueryStatisticsProperties {
     #[serde(rename = "endTime", default, skip_serializing_if = "Option::is_none")]
     pub end_time: Option<String>,
     #[doc = "List of intervals with appropriate metric data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub intervals: Vec<QueryMetricInterval>,
 }
 impl QueryStatisticsProperties {
@@ -11744,16 +12266,36 @@ pub struct RecommendedActionProperties {
     #[serde(rename = "errorDetails", default, skip_serializing_if = "Option::is_none")]
     pub error_details: Option<RecommendedActionErrorInfo>,
     #[doc = "Gets the estimated impact info for this recommended action e.g., Estimated CPU gain, Estimated Disk Space change"]
-    #[serde(rename = "estimatedImpact", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "estimatedImpact",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub estimated_impact: Vec<RecommendedActionImpactRecord>,
     #[doc = "Gets the observed/actual impact info for this recommended action e.g., Actual CPU gain, Actual Disk Space change"]
-    #[serde(rename = "observedImpact", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "observedImpact",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub observed_impact: Vec<RecommendedActionImpactRecord>,
     #[doc = "Gets the time series info of metrics for this recommended action e.g., CPU consumption time series"]
-    #[serde(rename = "timeSeries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeSeries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_series: Vec<RecommendedActionMetricInfo>,
     #[doc = "Gets the linked objects, if any."]
-    #[serde(rename = "linkedObjects", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedObjects",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_objects: Vec<String>,
     #[doc = "Gets additional details specific to this recommended action."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11912,7 +12454,11 @@ impl RecommendedSensitivityLabelUpdate {
 #[doc = "A list of recommended sensitivity label update operations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecommendedSensitivityLabelUpdateList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<RecommendedSensitivityLabelUpdate>,
 }
 impl RecommendedSensitivityLabelUpdateList {
@@ -12016,7 +12562,11 @@ impl RecoverableManagedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoverableManagedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoverableManagedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12052,7 +12602,11 @@ pub struct Remediation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "SQL Vulnerability Assessment remediation script."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scripts: Vec<String>,
     #[doc = "SQL Vulnerability Assessment is remediation automated."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -12084,7 +12638,11 @@ impl ReplicationLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationLinkListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationLink>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12391,7 +12949,11 @@ impl RestorableDroppedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableDroppedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableDroppedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12500,7 +13062,11 @@ impl RestorableDroppedManagedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableDroppedManagedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableDroppedManagedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12559,7 +13125,11 @@ impl RestorePoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorePoint>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12612,7 +13182,11 @@ pub mod restore_point_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlVulnerabilityAssessmentScanListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlVulnerabilityAssessmentScanResults>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12635,10 +13209,20 @@ pub struct SecurityAlertPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled or a policy has not been applied yet on the specific database."]
     pub state: security_alert_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly, Data_Exfiltration, Unsafe_Action, Brute_Force"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -12686,10 +13270,20 @@ pub struct SecurityAlertsPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled or a policy has not been applied yet on the specific database."]
     pub state: security_alerts_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly, Data_Exfiltration, Unsafe_Action, Brute_Force"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -12748,7 +13342,11 @@ impl SecurityEvent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityEventCollection {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SecurityEvent>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12881,7 +13479,11 @@ impl SensitivityLabel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SensitivityLabelListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SensitivityLabel>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12961,7 +13563,11 @@ impl SensitivityLabelUpdate {
 #[doc = "A list of sensitivity label update operations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SensitivityLabelUpdateList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<SensitivityLabelUpdate>,
 }
 impl SensitivityLabelUpdateList {
@@ -13106,7 +13712,11 @@ impl ServerBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13133,7 +13743,12 @@ pub struct ServerBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\nLEDGER_OPERATION_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies whether storageAccountAccessKey value is the storage's secondary key."]
     #[serde(rename = "isStorageSecondaryKeyInUse", default, skip_serializing_if = "Option::is_none")]
@@ -13209,7 +13824,11 @@ impl ServerCommunicationLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerCommunicationLinkListResult {
     #[doc = "The list of server communication links."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerCommunicationLink>,
 }
 impl azure_core::Continuable for ServerCommunicationLinkListResult {
@@ -13265,7 +13884,11 @@ impl ServerConnectionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerConnectionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerConnectionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13340,7 +13963,11 @@ pub mod server_connection_policy_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerDevOpsAuditSettingsListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerDevOpsAuditingSettings>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13442,7 +14069,11 @@ impl ServerDnsAliasAcquisition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerDnsAliasListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerDnsAlias>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13626,7 +14257,11 @@ impl ServerKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerKeyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerKey>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13721,7 +14356,11 @@ pub mod server_key_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13756,7 +14395,11 @@ impl ServerOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13903,7 +14546,12 @@ pub struct ServerProperties {
     #[serde(rename = "fullyQualifiedDomainName", default, skip_serializing_if = "Option::is_none")]
     pub fully_qualified_domain_name: Option<String>,
     #[doc = "List of private endpoint connections on a server"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ServerPrivateEndpointConnection>,
     #[doc = "Minimal TLS version. Allowed values: '1.0', '1.1', '1.2'"]
     #[serde(rename = "minimalTlsVersion", default, skip_serializing_if = "Option::is_none")]
@@ -14102,7 +14750,11 @@ impl ServerTrustCertificateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerTrustCertificatesListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerTrustCertificate>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14137,7 +14789,11 @@ impl ServerTrustGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerTrustGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerTrustGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14244,10 +14900,20 @@ pub struct ServerVersionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported database editions."]
-    #[serde(rename = "supportedEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_editions: Vec<EditionCapability>,
     #[doc = "The list of supported elastic pool editions."]
-    #[serde(rename = "supportedElasticPoolEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedElasticPoolEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_elastic_pool_editions: Vec<ElasticPoolEditionCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -14290,7 +14956,11 @@ impl ServerVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14357,7 +15027,12 @@ pub struct ServiceObjectiveCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported maximum database sizes."]
-    #[serde(rename = "supportedMaxSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaxSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_max_sizes: Vec<MaxSizeRangeCapability>,
     #[doc = "The performance level capability."]
     #[serde(rename = "performanceLevel", default, skip_serializing_if = "Option::is_none")]
@@ -14366,7 +15041,12 @@ pub struct ServiceObjectiveCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<Sku>,
     #[doc = "List of supported license types."]
-    #[serde(rename = "supportedLicenseTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLicenseTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_license_types: Vec<LicenseTypeCapability>,
     #[doc = "The maximum size capability."]
     #[serde(rename = "includedMaxSize", default, skip_serializing_if = "Option::is_none")]
@@ -14378,13 +15058,23 @@ pub struct ServiceObjectiveCapability {
     #[serde(rename = "supportedAutoPauseDelay", default, skip_serializing_if = "Option::is_none")]
     pub supported_auto_pause_delay: Option<AutoPauseDelayTimeRange>,
     #[doc = "List of supported min capacities"]
-    #[serde(rename = "supportedMinCapacities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMinCapacities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_min_capacities: Vec<MinCapacityCapability>,
     #[doc = "The compute model"]
     #[serde(rename = "computeModel", default, skip_serializing_if = "Option::is_none")]
     pub compute_model: Option<String>,
     #[doc = "List of supported maintenance configurations"]
-    #[serde(rename = "supportedMaintenanceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaintenanceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_maintenance_configurations: Vec<MaintenanceConfigurationCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -14816,7 +15506,11 @@ impl SqlVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14889,7 +15583,11 @@ impl SqlVulnerabilityAssessmentScanRecord {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlVulnerabilityAssessmentScanRecordListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlVulnerabilityAssessmentScanRecord>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14925,7 +15623,11 @@ pub struct SqlVulnerabilityAssessmentScanRecordProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The scan errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<SqlVulnerabilityAssessmentScanError>,
     #[doc = "The server name."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -15060,7 +15762,12 @@ pub struct SqlVulnerabilityAssessmentScanResultProperties {
     #[serde(rename = "isTrimmed", default, skip_serializing_if = "Option::is_none")]
     pub is_trimmed: Option<bool>,
     #[doc = "SQL Vulnerability Assessment query results that was run."]
-    #[serde(rename = "queryResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "queryResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub query_results: Vec<Vec<String>>,
     #[doc = "SQL Vulnerability Assessment remediation Details."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -15192,7 +15899,11 @@ impl SubscriptionUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionUsageListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionUsage>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15274,7 +15985,11 @@ impl SyncAgentLinkedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncAgentLinkedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncAgentLinkedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15362,7 +16077,11 @@ pub mod sync_agent_linked_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncAgentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncAgent>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15455,7 +16174,11 @@ pub mod sync_agent_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncDatabaseIdListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncDatabaseIdProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15488,7 +16211,11 @@ impl SyncDatabaseIdProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncFullSchemaProperties {
     #[doc = "List of tables in the database full schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<SyncFullSchemaTable>,
     #[doc = "Last update time of the database schema."]
     #[serde(rename = "lastUpdateTime", default, with = "azure_core::date::rfc3339::option")]
@@ -15503,7 +16230,11 @@ impl SyncFullSchemaProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncFullSchemaPropertiesListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncFullSchemaProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15524,7 +16255,11 @@ impl SyncFullSchemaPropertiesListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncFullSchemaTable {
     #[doc = "List of columns in the table of database full schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<SyncFullSchemaTableColumn>,
     #[doc = "Error id of the table."]
     #[serde(rename = "errorId", default, skip_serializing_if = "Option::is_none")]
@@ -15595,7 +16330,11 @@ impl SyncGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15616,7 +16355,11 @@ impl SyncGroupListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupLogListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncGroupLogProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15836,7 +16579,11 @@ pub mod sync_group_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupSchema {
     #[doc = "List of tables in sync group schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<SyncGroupSchemaTable>,
     #[doc = "Name of master sync member where the schema is from."]
     #[serde(rename = "masterSyncMemberName", default, skip_serializing_if = "Option::is_none")]
@@ -15851,7 +16598,11 @@ impl SyncGroupSchema {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupSchemaTable {
     #[doc = "List of columns in sync group schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<SyncGroupSchemaTableColumn>,
     #[doc = "Quoted name of sync group schema table."]
     #[serde(rename = "quotedName", default, skip_serializing_if = "Option::is_none")]
@@ -15898,7 +16649,11 @@ impl SyncMember {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncMemberListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncMember>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16158,7 +16913,11 @@ impl TimeZone {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TimeZoneListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TimeZone>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16211,7 +16970,11 @@ pub struct TopQueries {
     #[serde(rename = "endTime", default, skip_serializing_if = "Option::is_none")]
     pub end_time: Option<String>,
     #[doc = "List of top resource consuming queries with appropriate metric data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub queries: Vec<QueryStatisticsProperties>,
 }
 impl TopQueries {
@@ -16265,7 +17028,11 @@ pub mod top_queries {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopQueriesListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TopQueries>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16481,7 +17248,11 @@ impl Usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16541,7 +17312,12 @@ pub struct VaRule {
     #[serde(rename = "queryCheck", default, skip_serializing_if = "Option::is_none")]
     pub query_check: Option<QueryCheck>,
     #[doc = "SQL Vulnerability Assessment benchmark references."]
-    #[serde(rename = "benchmarkReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "benchmarkReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub benchmark_references: Vec<BenchmarkReference>,
 }
 impl VaRule {
@@ -16657,7 +17433,11 @@ impl VirtualCluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualClusterListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualCluster>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16684,7 +17464,12 @@ pub struct VirtualClusterProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub family: Option<String>,
     #[doc = "List of resources in this virtual cluster."]
-    #[serde(rename = "childResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_resources: Vec<String>,
     #[doc = "Specifies maintenance configuration id to apply to this virtual cluster."]
     #[serde(rename = "maintenanceConfigurationId", default, skip_serializing_if = "Option::is_none")]
@@ -16728,7 +17513,11 @@ impl VirtualNetworkRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkRuleListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkRule>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16825,7 +17614,11 @@ pub struct VulnerabilityAssessmentRecurringScansProperties {
     #[serde(rename = "emailSubscriptionAdmins", default, skip_serializing_if = "Option::is_none")]
     pub email_subscription_admins: Option<bool>,
     #[doc = "Specifies an array of e-mail addresses to which the scan notification is sent."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
 }
 impl VulnerabilityAssessmentRecurringScansProperties {
@@ -16866,7 +17659,11 @@ impl VulnerabilityAssessmentScanRecord {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VulnerabilityAssessmentScanRecordListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VulnerabilityAssessmentScanRecord>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16902,7 +17699,11 @@ pub struct VulnerabilityAssessmentScanRecordProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The scan errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<VulnerabilityAssessmentScanError>,
     #[doc = "The scan results storage container path."]
     #[serde(rename = "storageContainerPath", default, skip_serializing_if = "Option::is_none")]
@@ -17015,7 +17816,11 @@ impl WorkloadClassifier {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadClassifierListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadClassifier>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -17084,7 +17889,11 @@ impl WorkloadGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/sql/src/package_preview_2021_11/models.rs b/services/mgmt/sql/src/package_preview_2021_11/models.rs
index a0afc22317..19c0fab64a 100644
--- a/services/mgmt/sql/src/package_preview_2021_11/models.rs
+++ b/services/mgmt/sql/src/package_preview_2021_11/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AdministratorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerAzureAdAdministrator>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -156,7 +160,12 @@ pub struct AdvisorProperties {
     #[serde(rename = "lastChecked", default, with = "azure_core::date::rfc3339::option")]
     pub last_checked: Option<time::OffsetDateTime>,
     #[doc = "Gets the recommended actions for this advisor."]
-    #[serde(rename = "recommendedActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recommendedActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommended_actions: Vec<RecommendedAction>,
 }
 impl AdvisorProperties {
@@ -395,7 +404,11 @@ pub mod automatic_tuning_server_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureAdOnlyAuthListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerAzureAdOnlyAuthentication>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -444,7 +457,11 @@ impl BackupShortTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BackupShortTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BackupShortTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -714,7 +731,11 @@ impl DataWarehouseUserActivities {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataWarehouseUserActivitiesListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataWarehouseUserActivities>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -797,7 +818,11 @@ impl DatabaseAdvancedThreatProtection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseAdvancedThreatProtectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseAdvancedThreatProtection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -886,7 +911,11 @@ impl DatabaseBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -910,7 +939,12 @@ pub struct DatabaseBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\nLEDGER_OPERATION_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies whether storageAccountAccessKey value is the storage's secondary key."]
     #[serde(rename = "isStorageSecondaryKeyInUse", default, skip_serializing_if = "Option::is_none")]
@@ -979,7 +1013,11 @@ impl DatabaseColumn {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseColumnListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseColumn>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1410,7 +1448,11 @@ pub mod database_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1445,7 +1487,11 @@ impl DatabaseOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2121,7 +2167,11 @@ impl DatabaseSchema {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseSchemaListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseSchema>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2142,7 +2192,11 @@ impl DatabaseSchemaListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseSecurityAlertListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2194,7 +2248,11 @@ impl DatabaseTable {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseTableListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseTable>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2851,7 +2909,11 @@ impl DatabaseUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseUsageListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseUsage>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2922,7 +2984,11 @@ impl DatabaseVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabaseVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3041,7 +3107,11 @@ impl DeletedServer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedServerListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedServer>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3176,7 +3246,11 @@ pub mod distributed_availability_group_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DistributedAvailabilityGroupsListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DistributedAvailabilityGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3221,7 +3295,12 @@ pub struct EditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported service objectives for the edition."]
-    #[serde(rename = "supportedServiceLevelObjectives", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServiceLevelObjectives",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_service_level_objectives: Vec<ServiceObjectiveCapability>,
     #[doc = "Whether or not zone redundancy is supported for the edition."]
     #[serde(rename = "zoneRedundant", default, skip_serializing_if = "Option::is_none")]
@@ -3230,7 +3309,12 @@ pub struct EditionCapability {
     #[serde(rename = "readScale", default, skip_serializing_if = "Option::is_none")]
     pub read_scale: Option<ReadScaleCapability>,
     #[doc = "The list of supported storage capabilities for this edition"]
-    #[serde(rename = "supportedStorageCapabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageCapabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_capabilities: Vec<StorageCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3287,7 +3371,12 @@ pub struct ElasticPoolEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported elastic pool DTU levels for the edition."]
-    #[serde(rename = "supportedElasticPoolPerformanceLevels", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedElasticPoolPerformanceLevels",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_elastic_pool_performance_levels: Vec<ElasticPoolPerformanceLevelCapability>,
     #[doc = "Whether or not zone redundancy is supported for the edition."]
     #[serde(rename = "zoneRedundant", default, skip_serializing_if = "Option::is_none")]
@@ -3319,7 +3408,11 @@ pub mod elastic_pool_edition_capability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ElasticPoolListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ElasticPool>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3354,7 +3447,11 @@ impl ElasticPoolOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ElasticPoolOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ElasticPoolOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3435,6 +3532,7 @@ pub struct ElasticPoolPerDatabaseMaxPerformanceLevelCapability {
     #[serde(
         rename = "supportedPerDatabaseMinPerformanceLevels",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub supported_per_database_min_performance_levels: Vec<ElasticPoolPerDatabaseMinPerformanceLevelCapability>,
@@ -3594,7 +3692,12 @@ pub struct ElasticPoolPerformanceLevelCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<Sku>,
     #[doc = "List of supported license types."]
-    #[serde(rename = "supportedLicenseTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLicenseTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_license_types: Vec<LicenseTypeCapability>,
     #[doc = "The maximum number of databases supported."]
     #[serde(rename = "maxDatabaseCount", default, skip_serializing_if = "Option::is_none")]
@@ -3603,15 +3706,26 @@ pub struct ElasticPoolPerformanceLevelCapability {
     #[serde(rename = "includedMaxSize", default, skip_serializing_if = "Option::is_none")]
     pub included_max_size: Option<MaxSizeCapability>,
     #[doc = "The list of supported max sizes."]
-    #[serde(rename = "supportedMaxSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaxSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_max_sizes: Vec<MaxSizeRangeCapability>,
     #[doc = "The list of supported per database max sizes."]
-    #[serde(rename = "supportedPerDatabaseMaxSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedPerDatabaseMaxSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_per_database_max_sizes: Vec<MaxSizeRangeCapability>,
     #[doc = "The list of supported per database max performance levels."]
     #[serde(
         rename = "supportedPerDatabaseMaxPerformanceLevels",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub supported_per_database_max_performance_levels: Vec<ElasticPoolPerDatabaseMaxPerformanceLevelCapability>,
@@ -3619,7 +3733,12 @@ pub struct ElasticPoolPerformanceLevelCapability {
     #[serde(rename = "zoneRedundant", default, skip_serializing_if = "Option::is_none")]
     pub zone_redundant: Option<bool>,
     #[doc = "List of supported maintenance configurations"]
-    #[serde(rename = "supportedMaintenanceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaintenanceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_maintenance_configurations: Vec<MaintenanceConfigurationCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3871,7 +3990,11 @@ impl EncryptionProtector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EncryptionProtectorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EncryptionProtector>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3980,7 +4103,11 @@ impl EndpointCertificate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EndpointCertificateListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EndpointCertificate>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4016,7 +4143,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The IP Addresses and Ports used when connecting to DomainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -4138,7 +4270,11 @@ impl ExtendedDatabaseBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtendedDatabaseBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtendedDatabaseBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4165,7 +4301,12 @@ pub struct ExtendedDatabaseBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\nLEDGER_OPERATION_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies whether storageAccountAccessKey value is the storage's secondary key."]
     #[serde(rename = "isStorageSecondaryKeyInUse", default, skip_serializing_if = "Option::is_none")]
@@ -4235,7 +4376,11 @@ impl ExtendedServerBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtendedServerBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtendedServerBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4265,7 +4410,12 @@ pub struct ExtendedServerBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\nLEDGER_OPERATION_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies whether storageAccountAccessKey value is the storage's secondary key."]
     #[serde(rename = "isStorageSecondaryKeyInUse", default, skip_serializing_if = "Option::is_none")]
@@ -4342,7 +4492,11 @@ impl FailoverGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FailoverGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FailoverGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4378,7 +4532,11 @@ pub struct FailoverGroupProperties {
     #[serde(rename = "partnerServers")]
     pub partner_servers: Vec<PartnerInfo>,
     #[doc = "List of databases in the failover group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
 }
 impl FailoverGroupProperties {
@@ -4572,7 +4730,11 @@ pub struct FailoverGroupUpdateProperties {
     #[serde(rename = "readOnlyEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub read_only_endpoint: Option<FailoverGroupReadOnlyEndpoint>,
     #[doc = "List of databases in the failover group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub databases: Vec<String>,
 }
 impl FailoverGroupUpdateProperties {
@@ -4597,7 +4759,11 @@ impl FirewallRule {
 #[doc = "A list of server firewall rules."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<FirewallRule>,
 }
 impl FirewallRuleList {
@@ -4609,7 +4775,11 @@ impl FirewallRuleList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FirewallRuleListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FirewallRule>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4644,7 +4814,11 @@ impl IPv6FirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IPv6FirewallRuleListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IPv6FirewallRule>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4764,7 +4938,11 @@ pub mod import_existing_database_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImportExportExtensionsOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImportExportExtensionsOperationResult>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4826,7 +5004,12 @@ pub struct ImportExportExtensionsOperationResultProperties {
     #[serde(rename = "blobUri", default, skip_serializing_if = "Option::is_none")]
     pub blob_uri: Option<String>,
     #[doc = "Gets the status of private endpoints associated with this request."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionRequestStatus>,
 }
 impl ImportExportExtensionsOperationResultProperties {
@@ -4879,7 +5062,12 @@ pub struct ImportExportOperationResultProperties {
     #[serde(rename = "errorMessage", default, skip_serializing_if = "Option::is_none")]
     pub error_message: Option<String>,
     #[doc = "Gets the status of private endpoints associated with this request."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionRequestStatus>,
 }
 impl ImportExportOperationResultProperties {
@@ -5005,7 +5193,11 @@ impl InstanceFailoverGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstanceFailoverGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InstanceFailoverGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5242,7 +5434,12 @@ pub struct InstancePoolEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The supported families."]
-    #[serde(rename = "supportedFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_families: Vec<InstancePoolFamilyCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5274,10 +5471,20 @@ pub struct InstancePoolFamilyCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of supported license types."]
-    #[serde(rename = "supportedLicenseTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLicenseTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_license_types: Vec<LicenseTypeCapability>,
     #[doc = "List of supported virtual cores values."]
-    #[serde(rename = "supportedVcoresValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedVcoresValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_vcores_values: Vec<InstancePoolVcoresCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5306,7 +5513,11 @@ pub mod instance_pool_family_capability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstancePoolListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<InstancePool>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5471,7 +5682,11 @@ impl JobAgent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobAgentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobAgent>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5579,7 +5794,11 @@ impl JobCredential {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobCredentialListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobCredential>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5627,7 +5846,11 @@ impl JobExecution {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobExecutionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobExecution>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5859,7 +6082,11 @@ pub mod job_execution_target {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Job>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6078,7 +6305,11 @@ impl JobStepExecutionOptions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobStepListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobStep>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6324,7 +6555,11 @@ impl JobTargetGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobTargetGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobTargetGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6367,7 +6602,11 @@ impl JobVersion {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobVersionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobVersion>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6402,7 +6641,11 @@ impl LedgerDigestUploads {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LedgerDigestUploadsListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LedgerDigestUploads>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6479,10 +6722,20 @@ pub struct LocationCapabilities {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported server versions."]
-    #[serde(rename = "supportedServerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedServerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_server_versions: Vec<ServerVersionCapability>,
     #[doc = "The list of supported managed instance versions."]
-    #[serde(rename = "supportedManagedInstanceVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedManagedInstanceVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_managed_instance_versions: Vec<ManagedInstanceVersionCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -6586,7 +6839,11 @@ impl LogicalDatabaseTransparentDataEncryption {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogicalDatabaseTransparentDataEncryptionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LogicalDatabaseTransparentDataEncryption>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6607,7 +6864,11 @@ impl LogicalDatabaseTransparentDataEncryptionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogicalServerAdvancedThreatProtectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerAdvancedThreatProtection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6628,7 +6889,11 @@ impl LogicalServerAdvancedThreatProtectionListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LogicalServerSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6663,7 +6928,11 @@ impl LongTermRetentionBackup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LongTermRetentionBackupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LongTermRetentionBackup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6904,7 +7173,11 @@ impl LongTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LongTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LongTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6974,7 +7247,12 @@ pub struct MaintenanceWindowOptionsProperties {
     #[serde(rename = "isEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_enabled: Option<bool>,
     #[doc = "Available maintenance cycles e.g. {Saturday, 0, 48*60}, {Wednesday, 0, 24*60}."]
-    #[serde(rename = "maintenanceWindowCycles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "maintenanceWindowCycles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub maintenance_window_cycles: Vec<MaintenanceWindowTimeRange>,
     #[doc = "Minimum duration of maintenance window."]
     #[serde(rename = "minDurationInMinutes", default, skip_serializing_if = "Option::is_none")]
@@ -7086,7 +7364,12 @@ impl MaintenanceWindows {
 #[doc = "Maintenance windows resource properties."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MaintenanceWindowsProperties {
-    #[serde(rename = "timeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_ranges: Vec<MaintenanceWindowTimeRange>,
 }
 impl MaintenanceWindowsProperties {
@@ -7112,7 +7395,11 @@ impl ManagedBackupShortTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedBackupShortTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedBackupShortTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7162,7 +7449,11 @@ impl ManagedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7394,7 +7685,12 @@ pub struct ManagedDatabaseRestoreDetailsProperties {
     #[serde(rename = "percentCompleted", default, skip_serializing_if = "Option::is_none")]
     pub percent_completed: Option<f64>,
     #[doc = "List of unrestorable files."]
-    #[serde(rename = "unrestorableFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "unrestorableFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unrestorable_files: Vec<String>,
     #[doc = "Number of files detected."]
     #[serde(rename = "numberOfFilesDetected", default, skip_serializing_if = "Option::is_none")]
@@ -7446,7 +7742,11 @@ impl ManagedDatabaseSecurityAlertPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedDatabaseSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedDatabaseSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7521,7 +7821,11 @@ impl ManagedInstanceAdministrator {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceAdministratorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceAdministrator>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7604,7 +7908,11 @@ pub mod managed_instance_administrator_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceAzureAdOnlyAuthListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceAzureAdOnlyAuthentication>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7656,10 +7964,20 @@ pub struct ManagedInstanceEditionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The supported families."]
-    #[serde(rename = "supportedFamilies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFamilies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_families: Vec<ManagedInstanceFamilyCapability>,
     #[doc = "The list of supported storage capabilities for this edition"]
-    #[serde(rename = "supportedStorageCapabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageCapabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_capabilities: Vec<StorageCapability>,
     #[doc = "Whether or not zone redundancy is supported for the edition."]
     #[serde(rename = "zoneRedundant", default, skip_serializing_if = "Option::is_none")]
@@ -7708,7 +8026,11 @@ impl ManagedInstanceEncryptionProtector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceEncryptionProtectorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceEncryptionProtector>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7909,10 +8231,20 @@ pub struct ManagedInstanceFamilyCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<String>,
     #[doc = "List of supported license types."]
-    #[serde(rename = "supportedLicenseTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLicenseTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_license_types: Vec<LicenseTypeCapability>,
     #[doc = "List of supported virtual cores values."]
-    #[serde(rename = "supportedVcoresValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedVcoresValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_vcores_values: Vec<ManagedInstanceVcoresCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7958,7 +8290,11 @@ impl ManagedInstanceKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceKeyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceKey>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8049,7 +8385,11 @@ pub mod managed_instance_key_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstance>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8084,7 +8424,11 @@ impl ManagedInstanceLongTermRetentionBackup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceLongTermRetentionBackupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceLongTermRetentionBackup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8193,7 +8537,11 @@ impl ManagedInstanceLongTermRetentionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceLongTermRetentionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceLongTermRetentionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8257,7 +8605,11 @@ impl ManagedInstanceOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8399,7 +8751,12 @@ pub struct ManagedInstanceOperationSteps {
     #[serde(rename = "currentStep", default, skip_serializing_if = "Option::is_none")]
     pub current_step: Option<i32>,
     #[doc = "The operation steps list."]
-    #[serde(rename = "stepsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "stepsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub steps_list: Vec<UpsertManagedServerOperationStepWithEstimatesAndDuration>,
 }
 impl ManagedInstanceOperationSteps {
@@ -8455,7 +8812,11 @@ impl ManagedInstancePrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstancePrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstancePrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8517,7 +8878,11 @@ impl ManagedInstancePrivateLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstancePrivateLinkListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstancePrivateLink>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8541,10 +8906,20 @@ pub struct ManagedInstancePrivateLinkProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource required zone names."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl ManagedInstancePrivateLinkProperties {
@@ -8634,7 +9009,12 @@ pub struct ManagedInstanceProperties {
     #[serde(rename = "maintenanceConfigurationId", default, skip_serializing_if = "Option::is_none")]
     pub maintenance_configuration_id: Option<String>,
     #[doc = "List of private endpoint connections on a managed instance."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ManagedInstancePecProperty>,
     #[doc = "Minimal TLS version. Allowed values: 'None', '1.0', '1.1', '1.2'"]
     #[serde(rename = "minimalTlsVersion", default, skip_serializing_if = "Option::is_none")]
@@ -8900,7 +9280,11 @@ impl ManagedInstanceQuery {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceQueryStatistics {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueryStatistics>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8951,7 +9335,12 @@ pub struct ManagedInstanceVcoresCapability {
     #[serde(rename = "includedMaxSize", default, skip_serializing_if = "Option::is_none")]
     pub included_max_size: Option<MaxSizeCapability>,
     #[doc = "Storage size ranges."]
-    #[serde(rename = "supportedStorageSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedStorageSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_storage_sizes: Vec<MaxSizeRangeCapability>,
     #[doc = "True if this service objective is supported for managed instances in an instance pool."]
     #[serde(rename = "instancePoolSupported", default, skip_serializing_if = "Option::is_none")]
@@ -8960,7 +9349,12 @@ pub struct ManagedInstanceVcoresCapability {
     #[serde(rename = "standaloneSupported", default, skip_serializing_if = "Option::is_none")]
     pub standalone_supported: Option<bool>,
     #[doc = "List of supported maintenance configurations"]
-    #[serde(rename = "supportedMaintenanceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaintenanceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_maintenance_configurations: Vec<ManagedInstanceMaintenanceConfigurationCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8992,10 +9386,20 @@ pub struct ManagedInstanceVersionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported managed instance editions."]
-    #[serde(rename = "supportedEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_editions: Vec<ManagedInstanceEditionCapability>,
     #[doc = "The list of supported instance pool editions."]
-    #[serde(rename = "supportedInstancePoolEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedInstancePoolEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_instance_pool_editions: Vec<InstancePoolEditionCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -9038,7 +9442,11 @@ impl ManagedInstanceVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedInstanceVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedInstanceVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9125,7 +9533,11 @@ impl ManagedServerDnsAliasCreation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedServerDnsAliasListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedServerDnsAlias>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9178,7 +9590,11 @@ impl ManagedServerSecurityAlertPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedServerSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedServerSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9213,7 +9629,11 @@ impl ManagedTransparentDataEncryption {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedTransparentDataEncryptionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedTransparentDataEncryption>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9494,7 +9914,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9518,7 +9942,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that the managed instance service communicates with in order to function correctly."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -9530,7 +9958,11 @@ impl OutboundEnvironmentEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OutboundEnvironmentEndpointCollection {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OutboundEnvironmentEndpoint>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9565,7 +9997,11 @@ impl OutboundFirewallRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OutboundFirewallRuleListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OutboundFirewallRule>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9784,7 +10220,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9807,7 +10247,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "privateEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub private_endpoint: Option<PrivateEndpointProperty>,
     #[doc = "Group IDs."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
     pub private_link_service_connection_state: Option<PrivateLinkServiceConnectionStateProperty>,
@@ -9913,7 +10358,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -9937,10 +10386,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource required zone names."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -10081,7 +10540,11 @@ pub struct QueryMetricInterval {
     #[serde(rename = "executionCount", default, skip_serializing_if = "Option::is_none")]
     pub execution_count: Option<i64>,
     #[doc = "List of metric objects for this interval"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<QueryMetricProperties>,
 }
 impl QueryMetricInterval {
@@ -10256,7 +10719,11 @@ pub struct QueryStatisticsProperties {
     #[serde(rename = "endTime", default, skip_serializing_if = "Option::is_none")]
     pub end_time: Option<String>,
     #[doc = "List of intervals with appropriate metric data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub intervals: Vec<QueryMetricInterval>,
 }
 impl QueryStatisticsProperties {
@@ -10466,16 +10933,36 @@ pub struct RecommendedActionProperties {
     #[serde(rename = "errorDetails", default, skip_serializing_if = "Option::is_none")]
     pub error_details: Option<RecommendedActionErrorInfo>,
     #[doc = "Gets the estimated impact info for this recommended action e.g., Estimated CPU gain, Estimated Disk Space change"]
-    #[serde(rename = "estimatedImpact", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "estimatedImpact",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub estimated_impact: Vec<RecommendedActionImpactRecord>,
     #[doc = "Gets the observed/actual impact info for this recommended action e.g., Actual CPU gain, Actual Disk Space change"]
-    #[serde(rename = "observedImpact", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "observedImpact",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub observed_impact: Vec<RecommendedActionImpactRecord>,
     #[doc = "Gets the time series info of metrics for this recommended action e.g., CPU consumption time series"]
-    #[serde(rename = "timeSeries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeSeries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_series: Vec<RecommendedActionMetricInfo>,
     #[doc = "Gets the linked objects, if any."]
-    #[serde(rename = "linkedObjects", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedObjects",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_objects: Vec<String>,
     #[doc = "Gets additional details specific to this recommended action."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10634,7 +11121,11 @@ impl RecommendedSensitivityLabelUpdate {
 #[doc = "A list of recommended sensitivity label update operations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecommendedSensitivityLabelUpdateList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<RecommendedSensitivityLabelUpdate>,
 }
 impl RecommendedSensitivityLabelUpdateList {
@@ -10686,7 +11177,11 @@ impl RecoverableManagedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoverableManagedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoverableManagedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10733,7 +11228,11 @@ impl ReplicationLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationLinkListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationLink>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11037,7 +11536,11 @@ impl RestorableDroppedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableDroppedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableDroppedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11146,7 +11649,11 @@ impl RestorableDroppedManagedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorableDroppedManagedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorableDroppedManagedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11205,7 +11712,11 @@ impl RestorePoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorePoint>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11260,10 +11771,20 @@ pub struct SecurityAlertPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled or a policy has not been applied yet on the specific database."]
     pub state: security_alert_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly, Data_Exfiltration, Unsafe_Action, Brute_Force"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -11311,10 +11832,20 @@ pub struct SecurityAlertsPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled or a policy has not been applied yet on the specific database."]
     pub state: security_alerts_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly, Data_Exfiltration, Unsafe_Action, Brute_Force"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -11373,7 +11904,11 @@ impl SecurityEvent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecurityEventCollection {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SecurityEvent>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11506,7 +12041,11 @@ impl SensitivityLabel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SensitivityLabelListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SensitivityLabel>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11586,7 +12125,11 @@ impl SensitivityLabelUpdate {
 #[doc = "A list of sensitivity label update operations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SensitivityLabelUpdateList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<SensitivityLabelUpdate>,
 }
 impl SensitivityLabelUpdateList {
@@ -11731,7 +12274,11 @@ impl ServerBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11758,7 +12305,12 @@ pub struct ServerBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\nDBCC_GROUP\r\nDATABASE_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_CHANGE_GROUP\r\nLEDGER_OPERATION_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies whether storageAccountAccessKey value is the storage's secondary key."]
     #[serde(rename = "isStorageSecondaryKeyInUse", default, skip_serializing_if = "Option::is_none")]
@@ -11834,7 +12386,11 @@ impl ServerConnectionPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerConnectionPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerConnectionPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -11909,7 +12465,11 @@ pub mod server_connection_policy_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerDevOpsAuditSettingsListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerDevOpsAuditingSettings>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12011,7 +12571,11 @@ impl ServerDnsAliasAcquisition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerDnsAliasListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerDnsAlias>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12195,7 +12759,11 @@ impl ServerKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerKeyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerKey>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12290,7 +12858,11 @@ pub mod server_key_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Server>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12325,7 +12897,11 @@ impl ServerOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12472,7 +13048,12 @@ pub struct ServerProperties {
     #[serde(rename = "fullyQualifiedDomainName", default, skip_serializing_if = "Option::is_none")]
     pub fully_qualified_domain_name: Option<String>,
     #[doc = "List of private endpoint connections on a server"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ServerPrivateEndpointConnection>,
     #[doc = "Minimal TLS version. Allowed values: '1.0', '1.1', '1.2'"]
     #[serde(rename = "minimalTlsVersion", default, skip_serializing_if = "Option::is_none")]
@@ -12671,7 +13252,11 @@ impl ServerTrustCertificateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerTrustCertificatesListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerTrustCertificate>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12706,7 +13291,11 @@ impl ServerTrustGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerTrustGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerTrustGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12766,10 +13355,20 @@ pub struct ServerVersionCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported database editions."]
-    #[serde(rename = "supportedEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_editions: Vec<EditionCapability>,
     #[doc = "The list of supported elastic pool editions."]
-    #[serde(rename = "supportedElasticPoolEditions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedElasticPoolEditions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_elastic_pool_editions: Vec<ElasticPoolEditionCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -12812,7 +13411,11 @@ impl ServerVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -12865,7 +13468,12 @@ pub struct ServiceObjectiveCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of supported maximum database sizes."]
-    #[serde(rename = "supportedMaxSizes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaxSizes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_max_sizes: Vec<MaxSizeRangeCapability>,
     #[doc = "The performance level capability."]
     #[serde(rename = "performanceLevel", default, skip_serializing_if = "Option::is_none")]
@@ -12874,7 +13482,12 @@ pub struct ServiceObjectiveCapability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sku: Option<Sku>,
     #[doc = "List of supported license types."]
-    #[serde(rename = "supportedLicenseTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedLicenseTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_license_types: Vec<LicenseTypeCapability>,
     #[doc = "The maximum size capability."]
     #[serde(rename = "includedMaxSize", default, skip_serializing_if = "Option::is_none")]
@@ -12886,13 +13499,23 @@ pub struct ServiceObjectiveCapability {
     #[serde(rename = "supportedAutoPauseDelay", default, skip_serializing_if = "Option::is_none")]
     pub supported_auto_pause_delay: Option<AutoPauseDelayTimeRange>,
     #[doc = "List of supported min capacities"]
-    #[serde(rename = "supportedMinCapacities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMinCapacities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_min_capacities: Vec<MinCapacityCapability>,
     #[doc = "The compute model"]
     #[serde(rename = "computeModel", default, skip_serializing_if = "Option::is_none")]
     pub compute_model: Option<String>,
     #[doc = "List of supported maintenance configurations"]
-    #[serde(rename = "supportedMaintenanceConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedMaintenanceConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_maintenance_configurations: Vec<MaintenanceConfigurationCapability>,
     #[doc = "The status of the capability."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -13101,7 +13724,11 @@ impl SubscriptionUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionUsageListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionUsage>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13183,7 +13810,11 @@ impl SyncAgentLinkedDatabase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncAgentLinkedDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncAgentLinkedDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13271,7 +13902,11 @@ pub mod sync_agent_linked_database_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncAgentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncAgent>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13364,7 +13999,11 @@ pub mod sync_agent_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncDatabaseIdListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncDatabaseIdProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13397,7 +14036,11 @@ impl SyncDatabaseIdProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncFullSchemaProperties {
     #[doc = "List of tables in the database full schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<SyncFullSchemaTable>,
     #[doc = "Last update time of the database schema."]
     #[serde(rename = "lastUpdateTime", default, with = "azure_core::date::rfc3339::option")]
@@ -13412,7 +14055,11 @@ impl SyncFullSchemaProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncFullSchemaPropertiesListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncFullSchemaProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13433,7 +14080,11 @@ impl SyncFullSchemaPropertiesListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncFullSchemaTable {
     #[doc = "List of columns in the table of database full schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<SyncFullSchemaTableColumn>,
     #[doc = "Error id of the table."]
     #[serde(rename = "errorId", default, skip_serializing_if = "Option::is_none")]
@@ -13504,7 +14155,11 @@ impl SyncGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13525,7 +14180,11 @@ impl SyncGroupListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupLogListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncGroupLogProperties>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -13745,7 +14404,11 @@ pub mod sync_group_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupSchema {
     #[doc = "List of tables in sync group schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<SyncGroupSchemaTable>,
     #[doc = "Name of master sync member where the schema is from."]
     #[serde(rename = "masterSyncMemberName", default, skip_serializing_if = "Option::is_none")]
@@ -13760,7 +14423,11 @@ impl SyncGroupSchema {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupSchemaTable {
     #[doc = "List of columns in sync group schema."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<SyncGroupSchemaTableColumn>,
     #[doc = "Quoted name of sync group schema table."]
     #[serde(rename = "quotedName", default, skip_serializing_if = "Option::is_none")]
@@ -13807,7 +14474,11 @@ impl SyncMember {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncMemberListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncMember>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14067,7 +14738,11 @@ impl TimeZone {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TimeZoneListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TimeZone>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14120,7 +14795,11 @@ pub struct TopQueries {
     #[serde(rename = "endTime", default, skip_serializing_if = "Option::is_none")]
     pub end_time: Option<String>,
     #[doc = "List of top resource consuming queries with appropriate metric data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub queries: Vec<QueryStatisticsProperties>,
 }
 impl TopQueries {
@@ -14174,7 +14853,11 @@ pub mod top_queries {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TopQueriesListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TopQueries>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14396,7 +15079,11 @@ impl Usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14449,7 +15136,11 @@ impl VirtualCluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualClusterListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualCluster>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14476,7 +15167,12 @@ pub struct VirtualClusterProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub family: Option<String>,
     #[doc = "List of resources in this virtual cluster."]
-    #[serde(rename = "childResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub child_resources: Vec<String>,
     #[doc = "Specifies maintenance configuration id to apply to this virtual cluster."]
     #[serde(rename = "maintenanceConfigurationId", default, skip_serializing_if = "Option::is_none")]
@@ -14520,7 +15216,11 @@ impl VirtualNetworkRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualNetworkRuleListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetworkRule>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14617,7 +15317,11 @@ pub struct VulnerabilityAssessmentRecurringScansProperties {
     #[serde(rename = "emailSubscriptionAdmins", default, skip_serializing_if = "Option::is_none")]
     pub email_subscription_admins: Option<bool>,
     #[doc = "Specifies an array of e-mail addresses to which the scan notification is sent."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
 }
 impl VulnerabilityAssessmentRecurringScansProperties {
@@ -14658,7 +15362,11 @@ impl VulnerabilityAssessmentScanRecord {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VulnerabilityAssessmentScanRecordListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VulnerabilityAssessmentScanRecord>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14694,7 +15402,11 @@ pub struct VulnerabilityAssessmentScanRecordProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The scan errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<VulnerabilityAssessmentScanError>,
     #[doc = "The scan results storage container path."]
     #[serde(rename = "storageContainerPath", default, skip_serializing_if = "Option::is_none")]
@@ -14807,7 +15519,11 @@ impl WorkloadClassifier {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadClassifierListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadClassifier>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -14876,7 +15592,11 @@ impl WorkloadGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/sqlvirtualmachine/src/package_2017_03_01_preview/models.rs b/services/mgmt/sqlvirtualmachine/src/package_2017_03_01_preview/models.rs
index fbc593b0a2..353e09a839 100644
--- a/services/mgmt/sqlvirtualmachine/src/package_2017_03_01_preview/models.rs
+++ b/services/mgmt/sqlvirtualmachine/src/package_2017_03_01_preview/models.rs
@@ -190,7 +190,11 @@ impl AvailabilityGroupListener {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailabilityGroupListenerListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailabilityGroupListener>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -217,7 +221,12 @@ pub struct AvailabilityGroupListenerProperties {
     #[serde(rename = "availabilityGroupName", default, skip_serializing_if = "Option::is_none")]
     pub availability_group_name: Option<String>,
     #[doc = "List of load balancer configurations for an availability group listener."]
-    #[serde(rename = "loadBalancerConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_configurations: Vec<LoadBalancerConfiguration>,
     #[doc = "Create a default availability group if it does not exist."]
     #[serde(
@@ -275,7 +284,12 @@ pub struct LoadBalancerConfiguration {
     #[serde(rename = "probePort", default, skip_serializing_if = "Option::is_none")]
     pub probe_port: Option<i32>,
     #[doc = "List of the SQL virtual machine instance resource id's that are enrolled into the availability group listener."]
-    #[serde(rename = "sqlVirtualMachineInstances", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sqlVirtualMachineInstances",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sql_virtual_machine_instances: Vec<String>,
 }
 impl LoadBalancerConfiguration {
@@ -371,7 +385,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -492,7 +510,11 @@ pub mod resource_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlStorageSettings {
     #[doc = "Logical Unit Numbers for the disks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luns: Vec<i32>,
     #[doc = "SQL Server default file path"]
     #[serde(rename = "defaultFilePath", default, skip_serializing_if = "Option::is_none")]
@@ -699,7 +721,11 @@ impl SqlVirtualMachineGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlVirtualMachineGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlVirtualMachineGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -909,7 +935,11 @@ impl SqlVirtualMachineGroupUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlVirtualMachineListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlVirtualMachine>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/sqlvirtualmachine/src/package_2022_02/models.rs b/services/mgmt/sqlvirtualmachine/src/package_2022_02/models.rs
index febe0cb1d7..c0412748bb 100644
--- a/services/mgmt/sqlvirtualmachine/src/package_2022_02/models.rs
+++ b/services/mgmt/sqlvirtualmachine/src/package_2022_02/models.rs
@@ -19,7 +19,11 @@ impl AdditionalFeaturesServerConfigurations {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgConfiguration {
     #[doc = "Replica configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replicas: Vec<AgReplica>,
 }
 impl AgConfiguration {
@@ -264,7 +268,12 @@ pub struct AutoBackupSettings {
     #[serde(rename = "fullBackupFrequency", default, skip_serializing_if = "Option::is_none")]
     pub full_backup_frequency: Option<auto_backup_settings::FullBackupFrequency>,
     #[doc = "Days of the week for the backups when FullBackupFrequency is set to Weekly."]
-    #[serde(rename = "daysOfWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_week: Vec<String>,
     #[doc = "Start time of a given day during which full backups can take place. 0-23 hours."]
     #[serde(rename = "fullBackupStartTime", default, skip_serializing_if = "Option::is_none")]
@@ -415,7 +424,11 @@ impl AvailabilityGroupListener {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailabilityGroupListenerListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailabilityGroupListener>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -442,10 +455,20 @@ pub struct AvailabilityGroupListenerProperties {
     #[serde(rename = "availabilityGroupName", default, skip_serializing_if = "Option::is_none")]
     pub availability_group_name: Option<String>,
     #[doc = "List of load balancer configurations for an availability group listener."]
-    #[serde(rename = "loadBalancerConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_configurations: Vec<LoadBalancerConfiguration>,
     #[doc = "List of multi subnet IP configurations for an AG listener."]
-    #[serde(rename = "multiSubnetIpConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "multiSubnetIpConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub multi_subnet_ip_configurations: Vec<MultiSubnetIpConfiguration>,
     #[doc = "Create a default availability group if it does not exist."]
     #[serde(
@@ -506,7 +529,12 @@ pub struct LoadBalancerConfiguration {
     #[serde(rename = "probePort", default, skip_serializing_if = "Option::is_none")]
     pub probe_port: Option<i32>,
     #[doc = "List of the SQL virtual machine instance resource id's that are enrolled into the availability group listener."]
-    #[serde(rename = "sqlVirtualMachineInstances", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sqlVirtualMachineInstances",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sql_virtual_machine_instances: Vec<String>,
 }
 impl LoadBalancerConfiguration {
@@ -620,7 +648,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -773,7 +805,11 @@ impl SqlInstanceSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlStorageSettings {
     #[doc = "Logical Unit Numbers for the disks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luns: Vec<i32>,
     #[doc = "SQL Server default file path"]
     #[serde(rename = "defaultFilePath", default, skip_serializing_if = "Option::is_none")]
@@ -808,7 +844,11 @@ pub struct SqlTempDbSettings {
     #[serde(rename = "persistFolderPath", default, skip_serializing_if = "Option::is_none")]
     pub persist_folder_path: Option<String>,
     #[doc = "Logical Unit Numbers for the disks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luns: Vec<i32>,
     #[doc = "SQL Server default file path"]
     #[serde(rename = "defaultFilePath", default, skip_serializing_if = "Option::is_none")]
@@ -1063,7 +1103,11 @@ impl SqlVirtualMachineGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlVirtualMachineGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlVirtualMachineGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1273,7 +1317,11 @@ impl SqlVirtualMachineGroupUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlVirtualMachineListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlVirtualMachine>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/sqlvirtualmachine/src/package_preview_2021_11/models.rs b/services/mgmt/sqlvirtualmachine/src/package_preview_2021_11/models.rs
index 72dcf20d3a..9cf5e22861 100644
--- a/services/mgmt/sqlvirtualmachine/src/package_preview_2021_11/models.rs
+++ b/services/mgmt/sqlvirtualmachine/src/package_preview_2021_11/models.rs
@@ -19,7 +19,11 @@ impl AdditionalFeaturesServerConfigurations {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgConfiguration {
     #[doc = "Replica configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replicas: Vec<AgReplica>,
 }
 impl AgConfiguration {
@@ -264,7 +268,12 @@ pub struct AutoBackupSettings {
     #[serde(rename = "fullBackupFrequency", default, skip_serializing_if = "Option::is_none")]
     pub full_backup_frequency: Option<auto_backup_settings::FullBackupFrequency>,
     #[doc = "Days of the week for the backups when FullBackupFrequency is set to Weekly."]
-    #[serde(rename = "daysOfWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_week: Vec<String>,
     #[doc = "Start time of a given day during which full backups can take place. 0-23 hours."]
     #[serde(rename = "fullBackupStartTime", default, skip_serializing_if = "Option::is_none")]
@@ -415,7 +424,11 @@ impl AvailabilityGroupListener {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailabilityGroupListenerListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailabilityGroupListener>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -442,7 +455,12 @@ pub struct AvailabilityGroupListenerProperties {
     #[serde(rename = "availabilityGroupName", default, skip_serializing_if = "Option::is_none")]
     pub availability_group_name: Option<String>,
     #[doc = "List of load balancer configurations for an availability group listener."]
-    #[serde(rename = "loadBalancerConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_configurations: Vec<LoadBalancerConfiguration>,
     #[doc = "Create a default availability group if it does not exist."]
     #[serde(
@@ -503,7 +521,12 @@ pub struct LoadBalancerConfiguration {
     #[serde(rename = "probePort", default, skip_serializing_if = "Option::is_none")]
     pub probe_port: Option<i32>,
     #[doc = "List of the SQL virtual machine instance resource id's that are enrolled into the availability group listener."]
-    #[serde(rename = "sqlVirtualMachineInstances", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sqlVirtualMachineInstances",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sql_virtual_machine_instances: Vec<String>,
 }
 impl LoadBalancerConfiguration {
@@ -599,7 +622,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -746,7 +773,11 @@ impl SqlInstanceSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlStorageSettings {
     #[doc = "Logical Unit Numbers for the disks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luns: Vec<i32>,
     #[doc = "SQL Server default file path"]
     #[serde(rename = "defaultFilePath", default, skip_serializing_if = "Option::is_none")]
@@ -775,7 +806,11 @@ pub struct SqlTempDbSettings {
     #[serde(rename = "dataFileCount", default, skip_serializing_if = "Option::is_none")]
     pub data_file_count: Option<i32>,
     #[doc = "Logical Unit Numbers for the disks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luns: Vec<i32>,
     #[doc = "SQL Server default file path"]
     #[serde(rename = "defaultFilePath", default, skip_serializing_if = "Option::is_none")]
@@ -1030,7 +1065,11 @@ impl SqlVirtualMachineGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlVirtualMachineGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlVirtualMachineGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1240,7 +1279,11 @@ impl SqlVirtualMachineGroupUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlVirtualMachineListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlVirtualMachine>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/sqlvirtualmachine/src/package_preview_2022_02/models.rs b/services/mgmt/sqlvirtualmachine/src/package_preview_2022_02/models.rs
index febe0cb1d7..c0412748bb 100644
--- a/services/mgmt/sqlvirtualmachine/src/package_preview_2022_02/models.rs
+++ b/services/mgmt/sqlvirtualmachine/src/package_preview_2022_02/models.rs
@@ -19,7 +19,11 @@ impl AdditionalFeaturesServerConfigurations {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgConfiguration {
     #[doc = "Replica configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replicas: Vec<AgReplica>,
 }
 impl AgConfiguration {
@@ -264,7 +268,12 @@ pub struct AutoBackupSettings {
     #[serde(rename = "fullBackupFrequency", default, skip_serializing_if = "Option::is_none")]
     pub full_backup_frequency: Option<auto_backup_settings::FullBackupFrequency>,
     #[doc = "Days of the week for the backups when FullBackupFrequency is set to Weekly."]
-    #[serde(rename = "daysOfWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_week: Vec<String>,
     #[doc = "Start time of a given day during which full backups can take place. 0-23 hours."]
     #[serde(rename = "fullBackupStartTime", default, skip_serializing_if = "Option::is_none")]
@@ -415,7 +424,11 @@ impl AvailabilityGroupListener {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailabilityGroupListenerListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailabilityGroupListener>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -442,10 +455,20 @@ pub struct AvailabilityGroupListenerProperties {
     #[serde(rename = "availabilityGroupName", default, skip_serializing_if = "Option::is_none")]
     pub availability_group_name: Option<String>,
     #[doc = "List of load balancer configurations for an availability group listener."]
-    #[serde(rename = "loadBalancerConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_configurations: Vec<LoadBalancerConfiguration>,
     #[doc = "List of multi subnet IP configurations for an AG listener."]
-    #[serde(rename = "multiSubnetIpConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "multiSubnetIpConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub multi_subnet_ip_configurations: Vec<MultiSubnetIpConfiguration>,
     #[doc = "Create a default availability group if it does not exist."]
     #[serde(
@@ -506,7 +529,12 @@ pub struct LoadBalancerConfiguration {
     #[serde(rename = "probePort", default, skip_serializing_if = "Option::is_none")]
     pub probe_port: Option<i32>,
     #[doc = "List of the SQL virtual machine instance resource id's that are enrolled into the availability group listener."]
-    #[serde(rename = "sqlVirtualMachineInstances", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sqlVirtualMachineInstances",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sql_virtual_machine_instances: Vec<String>,
 }
 impl LoadBalancerConfiguration {
@@ -620,7 +648,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -773,7 +805,11 @@ impl SqlInstanceSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlStorageSettings {
     #[doc = "Logical Unit Numbers for the disks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luns: Vec<i32>,
     #[doc = "SQL Server default file path"]
     #[serde(rename = "defaultFilePath", default, skip_serializing_if = "Option::is_none")]
@@ -808,7 +844,11 @@ pub struct SqlTempDbSettings {
     #[serde(rename = "persistFolderPath", default, skip_serializing_if = "Option::is_none")]
     pub persist_folder_path: Option<String>,
     #[doc = "Logical Unit Numbers for the disks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luns: Vec<i32>,
     #[doc = "SQL Server default file path"]
     #[serde(rename = "defaultFilePath", default, skip_serializing_if = "Option::is_none")]
@@ -1063,7 +1103,11 @@ impl SqlVirtualMachineGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlVirtualMachineGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlVirtualMachineGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1273,7 +1317,11 @@ impl SqlVirtualMachineGroupUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlVirtualMachineListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlVirtualMachine>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/sqlvirtualmachine/src/package_preview_2022_07/models.rs b/services/mgmt/sqlvirtualmachine/src/package_preview_2022_07/models.rs
index 52cd220d29..4474f44994 100644
--- a/services/mgmt/sqlvirtualmachine/src/package_preview_2022_07/models.rs
+++ b/services/mgmt/sqlvirtualmachine/src/package_preview_2022_07/models.rs
@@ -19,7 +19,11 @@ impl AdditionalFeaturesServerConfigurations {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgConfiguration {
     #[doc = "Replica configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replicas: Vec<AgReplica>,
 }
 impl AgConfiguration {
@@ -265,7 +269,12 @@ pub struct AutoBackupSettings {
     #[serde(rename = "fullBackupFrequency", default, skip_serializing_if = "Option::is_none")]
     pub full_backup_frequency: Option<auto_backup_settings::FullBackupFrequency>,
     #[doc = "Days of the week for the backups when FullBackupFrequency is set to Weekly."]
-    #[serde(rename = "daysOfWeek", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "daysOfWeek",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub days_of_week: Vec<String>,
     #[doc = "Start time of a given day during which full backups can take place. 0-23 hours."]
     #[serde(rename = "fullBackupStartTime", default, skip_serializing_if = "Option::is_none")]
@@ -416,7 +425,11 @@ impl AvailabilityGroupListener {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailabilityGroupListenerListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailabilityGroupListener>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -443,10 +456,20 @@ pub struct AvailabilityGroupListenerProperties {
     #[serde(rename = "availabilityGroupName", default, skip_serializing_if = "Option::is_none")]
     pub availability_group_name: Option<String>,
     #[doc = "List of load balancer configurations for an availability group listener."]
-    #[serde(rename = "loadBalancerConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loadBalancerConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_balancer_configurations: Vec<LoadBalancerConfiguration>,
     #[doc = "List of multi subnet IP configurations for an AG listener."]
-    #[serde(rename = "multiSubnetIpConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "multiSubnetIpConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub multi_subnet_ip_configurations: Vec<MultiSubnetIpConfiguration>,
     #[doc = "Create a default availability group if it does not exist."]
     #[serde(
@@ -507,7 +530,12 @@ pub struct LoadBalancerConfiguration {
     #[serde(rename = "probePort", default, skip_serializing_if = "Option::is_none")]
     pub probe_port: Option<i32>,
     #[doc = "List of the SQL virtual machine instance resource id's that are enrolled into the availability group listener."]
-    #[serde(rename = "sqlVirtualMachineInstances", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sqlVirtualMachineInstances",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sql_virtual_machine_instances: Vec<String>,
 }
 impl LoadBalancerConfiguration {
@@ -621,7 +649,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -774,7 +806,11 @@ impl SqlInstanceSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlStorageSettings {
     #[doc = "Logical Unit Numbers for the disks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luns: Vec<i32>,
     #[doc = "SQL Server default file path"]
     #[serde(rename = "defaultFilePath", default, skip_serializing_if = "Option::is_none")]
@@ -810,7 +846,11 @@ pub struct SqlTempDbSettings {
     #[serde(rename = "persistFolderPath", default, skip_serializing_if = "Option::is_none")]
     pub persist_folder_path: Option<String>,
     #[doc = "Logical Unit Numbers for the disks."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luns: Vec<i32>,
     #[doc = "SQL Server default file path"]
     #[serde(rename = "defaultFilePath", default, skip_serializing_if = "Option::is_none")]
@@ -1066,7 +1106,11 @@ impl SqlVirtualMachineGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlVirtualMachineGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlVirtualMachineGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1276,7 +1320,11 @@ impl SqlVirtualMachineGroupUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlVirtualMachineListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlVirtualMachine>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/stack/src/package_2016_01/models.rs b/services/mgmt/stack/src/package_2016_01/models.rs
index d90d32be4c..6280231ccf 100644
--- a/services/mgmt/stack/src/package_2016_01/models.rs
+++ b/services/mgmt/stack/src/package_2016_01/models.rs
@@ -28,7 +28,11 @@ pub struct Compatibility {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of all issues found"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issues: Vec<CompatibilityIssue>,
 }
 impl Compatibility {
@@ -244,10 +248,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -517,7 +530,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -585,7 +602,11 @@ pub struct ProductList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of products."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Product>,
 }
 impl azure_core::Continuable for ProductList {
@@ -678,7 +699,11 @@ pub struct ProductNestedProperties {
     #[serde(rename = "iconUris", default, skip_serializing_if = "Option::is_none")]
     pub icon_uris: Option<IconUris>,
     #[doc = "Additional links available for this product."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<ProductLink>,
     #[doc = "The legal terms."]
     #[serde(rename = "legalTerms", default, skip_serializing_if = "Option::is_none")]
@@ -744,7 +769,11 @@ pub struct RegistrationList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Registrations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Registration>,
 }
 impl azure_core::Continuable for RegistrationList {
@@ -930,7 +959,12 @@ pub struct VirtualMachineProductProperties {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<OsDiskImage>,
     #[doc = "List of attached data disks."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<DataDiskImage>,
 }
 impl VirtualMachineProductProperties {
diff --git a/services/mgmt/stack/src/package_2017_06_01/models.rs b/services/mgmt/stack/src/package_2017_06_01/models.rs
index 77edd0b5fc..50f88d6f1e 100644
--- a/services/mgmt/stack/src/package_2017_06_01/models.rs
+++ b/services/mgmt/stack/src/package_2017_06_01/models.rs
@@ -90,7 +90,11 @@ pub struct Compatibility {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of all issues found"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issues: Vec<CompatibilityIssue>,
 }
 impl Compatibility {
@@ -227,7 +231,11 @@ pub struct CustomerSubscriptionList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of customer subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomerSubscription>,
 }
 impl azure_core::Continuable for CustomerSubscriptionList {
@@ -519,7 +527,11 @@ impl Operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "Array of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URI to the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -587,7 +599,11 @@ pub struct ProductList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of products."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Product>,
 }
 impl azure_core::Continuable for ProductList {
@@ -680,7 +696,11 @@ pub struct ProductNestedProperties {
     #[serde(rename = "iconUris", default, skip_serializing_if = "Option::is_none")]
     pub icon_uris: Option<IconUris>,
     #[doc = "Additional links available for this product."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<ProductLink>,
     #[doc = "The legal terms."]
     #[serde(rename = "legalTerms", default, skip_serializing_if = "Option::is_none")]
@@ -750,7 +770,11 @@ pub struct RegistrationList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Registrations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Registration>,
 }
 impl azure_core::Continuable for RegistrationList {
@@ -991,7 +1015,12 @@ pub struct VirtualMachineProductProperties {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<OsDiskImage>,
     #[doc = "List of attached data disks."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<DataDiskImage>,
 }
 impl VirtualMachineProductProperties {
diff --git a/services/mgmt/stack/src/package_2022_06/models.rs b/services/mgmt/stack/src/package_2022_06/models.rs
index aa06afc20c..29202b022d 100644
--- a/services/mgmt/stack/src/package_2022_06/models.rs
+++ b/services/mgmt/stack/src/package_2022_06/models.rs
@@ -90,7 +90,11 @@ pub struct Compatibility {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of all issues found"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issues: Vec<CompatibilityIssue>,
 }
 impl Compatibility {
@@ -227,7 +231,11 @@ pub struct CustomerSubscriptionList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of customer subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomerSubscription>,
 }
 impl azure_core::Continuable for CustomerSubscriptionList {
@@ -284,7 +292,12 @@ impl DeploymentLicenseRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeploymentLicenseResponse {
     #[doc = "A license chain that can be used to temporarily activate an Azure Stack device."]
-    #[serde(rename = "temporaryLicenseChain", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "temporaryLicenseChain",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub temporary_license_chain: Vec<String>,
     #[doc = "Signature of the license chain."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -546,7 +559,11 @@ impl Operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "Array of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URI to the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -614,7 +631,11 @@ pub struct ProductList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of products."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Product>,
 }
 impl azure_core::Continuable for ProductList {
@@ -707,7 +728,11 @@ pub struct ProductNestedProperties {
     #[serde(rename = "iconUris", default, skip_serializing_if = "Option::is_none")]
     pub icon_uris: Option<IconUris>,
     #[doc = "Additional links available for this product."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<ProductLink>,
     #[doc = "The legal terms."]
     #[serde(rename = "legalTerms", default, skip_serializing_if = "Option::is_none")]
@@ -777,7 +802,11 @@ pub struct RegistrationList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Registrations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Registration>,
 }
 impl azure_core::Continuable for RegistrationList {
@@ -1018,7 +1047,12 @@ pub struct VirtualMachineProductProperties {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<OsDiskImage>,
     #[doc = "List of attached data disks."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<DataDiskImage>,
 }
 impl VirtualMachineProductProperties {
diff --git a/services/mgmt/stack/src/package_preview_2020_06/models.rs b/services/mgmt/stack/src/package_preview_2020_06/models.rs
index 01f7c6d11e..bee21f8811 100644
--- a/services/mgmt/stack/src/package_preview_2020_06/models.rs
+++ b/services/mgmt/stack/src/package_preview_2020_06/models.rs
@@ -90,7 +90,11 @@ pub struct Compatibility {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of all issues found"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issues: Vec<CompatibilityIssue>,
 }
 impl Compatibility {
@@ -230,7 +234,11 @@ pub struct CustomerSubscriptionList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of customer subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomerSubscription>,
 }
 impl azure_core::Continuable for CustomerSubscriptionList {
@@ -564,7 +572,11 @@ pub struct LinkedSubscriptionsList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Linked Subscriptions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LinkedSubscription>,
 }
 impl azure_core::Continuable for LinkedSubscriptionsList {
@@ -660,7 +672,11 @@ impl Operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "Array of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URI to the next page of operations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -731,7 +747,11 @@ pub struct ProductList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of products."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Product>,
 }
 impl azure_core::Continuable for ProductList {
@@ -824,7 +844,11 @@ pub struct ProductNestedProperties {
     #[serde(rename = "iconUris", default, skip_serializing_if = "Option::is_none")]
     pub icon_uris: Option<IconUris>,
     #[doc = "Additional links available for this product."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<ProductLink>,
     #[doc = "The legal terms."]
     #[serde(rename = "legalTerms", default, skip_serializing_if = "Option::is_none")]
@@ -894,7 +918,11 @@ pub struct RegistrationList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Registrations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Registration>,
 }
 impl azure_core::Continuable for RegistrationList {
@@ -1143,7 +1171,12 @@ pub struct VirtualMachineProductProperties {
     #[serde(rename = "osDiskImage", default, skip_serializing_if = "Option::is_none")]
     pub os_disk_image: Option<OsDiskImage>,
     #[doc = "List of attached data disks."]
-    #[serde(rename = "dataDiskImages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDiskImages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disk_images: Vec<DataDiskImage>,
 }
 impl VirtualMachineProductProperties {
diff --git a/services/mgmt/storage/src/package_2021_06/models.rs b/services/mgmt/storage/src/package_2021_06/models.rs
index 9e9a9127ae..70d24e23f9 100644
--- a/services/mgmt/storage/src/package_2021_06/models.rs
+++ b/services/mgmt/storage/src/package_2021_06/models.rs
@@ -632,10 +632,20 @@ pub mod blob_inventory_policy_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobInventoryPolicyFilter {
     #[doc = "An array of strings for blob prefixes to be matched."]
-    #[serde(rename = "prefixMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "prefixMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub prefix_match: Vec<String>,
     #[doc = "An array of predefined enum values. Valid values include blockBlob, appendBlob, pageBlob. Hns accounts does not support pageBlobs. This field is required when definition.objectType property is set to 'Blob'."]
-    #[serde(rename = "blobTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_types: Vec<String>,
     #[doc = "Includes blob versions in blob inventory when value is set to true. The definition.schemaFields values 'VersionId and IsCurrentVersion' are required if this property is set to true, else they must be excluded."]
     #[serde(rename = "includeBlobVersions", default, skip_serializing_if = "Option::is_none")]
@@ -841,7 +851,11 @@ pub mod blob_restore_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobServiceItems {
     #[doc = "List of blob services returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BlobServiceProperties>,
 }
 impl azure_core::Continuable for BlobServiceItems {
@@ -984,7 +998,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -1225,7 +1243,12 @@ impl CorsRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CorsRules {
     #[doc = "The List of CORS rules. You can include up to five CorsRule elements in the request. "]
-    #[serde(rename = "corsRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "corsRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors_rules: Vec<CorsRule>,
 }
 impl CorsRules {
@@ -1312,7 +1335,11 @@ impl DeletedAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedAccountListResult {
     #[doc = "Gets the list of deleted accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedAccount>,
     #[doc = "Request URL that can be used to query next page of deleted accounts. Returned when total number of requested deleted accounts exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1511,7 +1538,11 @@ impl EncryptionScopeKeyVaultProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EncryptionScopeListResult {
     #[doc = "List of encryption scopes requested."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EncryptionScope>,
     #[doc = "Request URL that can be used to query next page of encryption scopes. Returned when total number of requested encryption scopes exceeds the maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1832,7 +1863,11 @@ impl Serialize for ExtendedLocationType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileServiceItems {
     #[doc = "List of file services returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FileServiceProperties>,
 }
 impl FileServiceItems {
@@ -1910,7 +1945,11 @@ impl FileShareItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileShareItems {
     #[doc = "List of file shares returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FileShareItem>,
     #[doc = "Request URL that can be used to query next page of shares. Returned when total number of requested shares exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1979,7 +2018,12 @@ pub struct FileShareProperties {
     #[serde(rename = "leaseDuration", default, skip_serializing_if = "Option::is_none")]
     pub lease_duration: Option<file_share_properties::LeaseDuration>,
     #[doc = "List of stored access policies specified on the share."]
-    #[serde(rename = "signedIdentifiers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "signedIdentifiers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub signed_identifiers: Vec<SignedIdentifier>,
     #[doc = "Creation time of share snapshot returned in the response of list shares with expand param \"snapshots\"."]
     #[serde(rename = "snapshotTime", default, with = "azure_core::date::rfc3339::option")]
@@ -2413,7 +2457,12 @@ pub struct ImmutabilityPolicyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "The ImmutabilityPolicy update history of the blob container."]
-    #[serde(rename = "updateHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "updateHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub update_history: Vec<UpdateHistoryProperty>,
 }
 impl ImmutabilityPolicyProperties {
@@ -2618,7 +2667,12 @@ pub struct LastAccessTimeTrackingPolicy {
     #[serde(rename = "trackingGranularityInDays", default, skip_serializing_if = "Option::is_none")]
     pub tracking_granularity_in_days: Option<i32>,
     #[doc = "An array of predefined supported blob types. Only blockBlob is the supported value. This field is currently read only"]
-    #[serde(rename = "blobType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_type: Vec<String>,
 }
 impl LastAccessTimeTrackingPolicy {
@@ -2843,7 +2897,11 @@ pub struct LegalHoldProperties {
     #[serde(rename = "hasLegalHold", default, skip_serializing_if = "Option::is_none")]
     pub has_legal_hold: Option<bool>,
     #[doc = "The list of LegalHold tags of a blob container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<TagProperty>,
     #[doc = "Protected append writes history setting for the blob container with Legal holds."]
     #[serde(rename = "protectedAppendWritesHistory", default, skip_serializing_if = "Option::is_none")]
@@ -2870,7 +2928,11 @@ impl ListAccountSasResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListBlobInventoryPolicy {
     #[doc = "List of blob inventory policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BlobInventoryPolicy>,
 }
 impl azure_core::Continuable for ListBlobInventoryPolicy {
@@ -2902,7 +2964,11 @@ impl ListContainerItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListContainerItems {
     #[doc = "List of blobs containers returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ListContainerItem>,
     #[doc = "Request URL that can be used to query next page of containers. Returned when total number of requested containers exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2946,7 +3012,11 @@ impl ListQueueProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListQueueResource {
     #[doc = "List of queues returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ListQueue>,
     #[doc = "Request URL that can be used to list next page of queues"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2966,7 +3036,11 @@ impl ListQueueResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListQueueServices {
     #[doc = "List of queue services returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueueServiceProperties>,
 }
 impl ListQueueServices {
@@ -2990,7 +3064,11 @@ impl ListServiceSasResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListTableResource {
     #[doc = "List of tables returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Table>,
     #[doc = "Request URL that can be used to query next page of tables"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3010,7 +3088,11 @@ impl ListTableResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListTableServices {
     #[doc = "List of table services returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TableServiceProperties>,
 }
 impl ListTableServices {
@@ -3089,13 +3171,23 @@ impl ManagementPolicyDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ManagementPolicyFilter {
     #[doc = "An array of strings for prefixes to be match."]
-    #[serde(rename = "prefixMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "prefixMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub prefix_match: Vec<String>,
     #[doc = "An array of predefined enum values. Currently blockBlob supports all tiering and delete actions. Only delete actions are supported for appendBlob."]
     #[serde(rename = "blobTypes")]
     pub blob_types: Vec<String>,
     #[doc = "An array of blob index tag based filters, there can be at most 10 tag filters"]
-    #[serde(rename = "blobIndexMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobIndexMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_index_match: Vec<TagFilter>,
 }
 impl ManagementPolicyFilter {
@@ -3249,7 +3341,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Dimensions of blobs, including blob type and access tier."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Aggregation type could be Average."]
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -3288,13 +3384,28 @@ pub struct NetworkRuleSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub bypass: Option<network_rule_set::Bypass>,
     #[doc = "Sets the resource access rules"]
-    #[serde(rename = "resourceAccessRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceAccessRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_access_rules: Vec<ResourceAccessRule>,
     #[doc = "Sets the virtual network rules"]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "Sets the IP ACL rules"]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
     #[doc = "Specifies the default action of allow or deny when no other rules match."]
     #[serde(rename = "defaultAction")]
@@ -3375,7 +3486,11 @@ pub mod network_rule_set {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ObjectReplicationPolicies {
     #[doc = "The replication policy between two storage accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ObjectReplicationPolicy>,
 }
 impl azure_core::Continuable for ObjectReplicationPolicies {
@@ -3407,7 +3522,12 @@ impl ObjectReplicationPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ObjectReplicationPolicyFilter {
     #[doc = "Optional. Filters the results to replicate only blobs whose names begin with the specified prefix."]
-    #[serde(rename = "prefixMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "prefixMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub prefix_match: Vec<String>,
     #[doc = "Blobs created after the time will be replicated to the destination. It must be in datetime format 'yyyy-MM-ddTHH:mm:ssZ'. Example: 2020-02-19T16:05:00Z"]
     #[serde(rename = "minCreationTime", default, skip_serializing_if = "Option::is_none")]
@@ -3434,7 +3554,11 @@ pub struct ObjectReplicationPolicyProperties {
     #[serde(rename = "destinationAccount")]
     pub destination_account: String,
     #[doc = "The storage account object replication rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ObjectReplicationPolicyRule>,
 }
 impl ObjectReplicationPolicyProperties {
@@ -3523,7 +3647,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Storage operations supported by the Storage resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -3579,7 +3707,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -3713,7 +3845,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -3728,10 +3864,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -3903,7 +4049,11 @@ pub struct Restriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for the restriction. As of now this can be \"QuotaId\" or \"NotAvailableForSubscription\". Quota Id is set when the SKU has requiredQuotas parameter as the subscription does not belong to that quota. The \"NotAvailableForSubscription\" is related to capacity at DC."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -4287,7 +4437,12 @@ pub mod service_sas_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -4337,13 +4492,25 @@ pub struct SkuInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kind: Option<sku_information::Kind>,
     #[doc = "The set of locations that the SKU is available. This will be supported and registered Azure Geo Regions (e.g. West US, East US, Southeast Asia, etc.)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The capability information in the specified SKU, including file encryption, network ACLs, change notification, etc."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<Restriction>,
 }
 impl SkuInformation {
@@ -4724,7 +4891,11 @@ pub mod storage_account_key {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountListKeysResult {
     #[doc = "Gets the list of storage account keys and their properties for the specified storage account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<StorageAccountKey>,
 }
 impl StorageAccountListKeysResult {
@@ -4736,7 +4907,11 @@ impl StorageAccountListKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountListResult {
     #[doc = "Gets the list of storage accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccount>,
     #[doc = "Request URL that can be used to query next page of storage accounts. Returned when total number of requested storage accounts exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4850,7 +5025,12 @@ pub struct StorageAccountProperties {
     #[serde(rename = "largeFileSharesState", default, skip_serializing_if = "Option::is_none")]
     pub large_file_shares_state: Option<storage_account_properties::LargeFileSharesState>,
     #[doc = "List of private endpoint connection associated with the specified storage account"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Routing preference defines the type of network, either microsoft or internet routing to be used to deliver the user data, the default option is microsoft routing"]
     #[serde(rename = "routingPreference", default, skip_serializing_if = "Option::is_none")]
@@ -5511,7 +5691,11 @@ impl StorageQueue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageSkuListResult {
     #[doc = "Get the list result of storage SKUs and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuInformation>,
 }
 impl azure_core::Continuable for StorageSkuListResult {
@@ -5759,7 +5943,11 @@ pub mod usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "Gets or sets the list of Storage Resource Usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResult {
diff --git a/services/mgmt/storage/src/package_2021_08/models.rs b/services/mgmt/storage/src/package_2021_08/models.rs
index a99da3f93e..f4ccc3c546 100644
--- a/services/mgmt/storage/src/package_2021_08/models.rs
+++ b/services/mgmt/storage/src/package_2021_08/models.rs
@@ -649,10 +649,20 @@ pub mod blob_inventory_policy_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobInventoryPolicyFilter {
     #[doc = "An array of strings for blob prefixes to be matched."]
-    #[serde(rename = "prefixMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "prefixMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub prefix_match: Vec<String>,
     #[doc = "An array of predefined enum values. Valid values include blockBlob, appendBlob, pageBlob. Hns accounts does not support pageBlobs. This field is required when definition.objectType property is set to 'Blob'."]
-    #[serde(rename = "blobTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_types: Vec<String>,
     #[doc = "Includes blob versions in blob inventory when value is set to true. The definition.schemaFields values 'VersionId and IsCurrentVersion' are required if this property is set to true, else they must be excluded."]
     #[serde(rename = "includeBlobVersions", default, skip_serializing_if = "Option::is_none")]
@@ -858,7 +868,11 @@ pub mod blob_restore_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobServiceItems {
     #[doc = "List of blob services returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BlobServiceProperties>,
 }
 impl azure_core::Continuable for BlobServiceItems {
@@ -1001,7 +1015,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -1242,7 +1260,12 @@ impl CorsRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CorsRules {
     #[doc = "The List of CORS rules. You can include up to five CorsRule elements in the request. "]
-    #[serde(rename = "corsRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "corsRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors_rules: Vec<CorsRule>,
 }
 impl CorsRules {
@@ -1329,7 +1352,11 @@ impl DeletedAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedAccountListResult {
     #[doc = "Gets the list of deleted accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedAccount>,
     #[doc = "Request URL that can be used to query next page of deleted accounts. Returned when total number of requested deleted accounts exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1531,7 +1558,11 @@ impl EncryptionScopeKeyVaultProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EncryptionScopeListResult {
     #[doc = "List of encryption scopes requested."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EncryptionScope>,
     #[doc = "Request URL that can be used to query next page of encryption scopes. Returned when total number of requested encryption scopes exceeds the maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1852,7 +1883,11 @@ impl Serialize for ExtendedLocationType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileServiceItems {
     #[doc = "List of file services returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FileServiceProperties>,
 }
 impl FileServiceItems {
@@ -1930,7 +1965,11 @@ impl FileShareItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileShareItems {
     #[doc = "List of file shares returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FileShareItem>,
     #[doc = "Request URL that can be used to query next page of shares. Returned when total number of requested shares exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1999,7 +2038,12 @@ pub struct FileShareProperties {
     #[serde(rename = "leaseDuration", default, skip_serializing_if = "Option::is_none")]
     pub lease_duration: Option<file_share_properties::LeaseDuration>,
     #[doc = "List of stored access policies specified on the share."]
-    #[serde(rename = "signedIdentifiers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "signedIdentifiers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub signed_identifiers: Vec<SignedIdentifier>,
     #[doc = "Creation time of share snapshot returned in the response of list shares with expand param \"snapshots\"."]
     #[serde(rename = "snapshotTime", default, with = "azure_core::date::rfc3339::option")]
@@ -2433,7 +2477,12 @@ pub struct ImmutabilityPolicyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "The ImmutabilityPolicy update history of the blob container."]
-    #[serde(rename = "updateHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "updateHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub update_history: Vec<UpdateHistoryProperty>,
 }
 impl ImmutabilityPolicyProperties {
@@ -2638,7 +2687,12 @@ pub struct LastAccessTimeTrackingPolicy {
     #[serde(rename = "trackingGranularityInDays", default, skip_serializing_if = "Option::is_none")]
     pub tracking_granularity_in_days: Option<i32>,
     #[doc = "An array of predefined supported blob types. Only blockBlob is the supported value. This field is currently read only"]
-    #[serde(rename = "blobType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_type: Vec<String>,
 }
 impl LastAccessTimeTrackingPolicy {
@@ -2863,7 +2917,11 @@ pub struct LegalHoldProperties {
     #[serde(rename = "hasLegalHold", default, skip_serializing_if = "Option::is_none")]
     pub has_legal_hold: Option<bool>,
     #[doc = "The list of LegalHold tags of a blob container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<TagProperty>,
     #[doc = "Protected append writes history setting for the blob container with Legal holds."]
     #[serde(rename = "protectedAppendWritesHistory", default, skip_serializing_if = "Option::is_none")]
@@ -2890,7 +2948,11 @@ impl ListAccountSasResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListBlobInventoryPolicy {
     #[doc = "List of blob inventory policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BlobInventoryPolicy>,
 }
 impl azure_core::Continuable for ListBlobInventoryPolicy {
@@ -2922,7 +2984,11 @@ impl ListContainerItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListContainerItems {
     #[doc = "List of blobs containers returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ListContainerItem>,
     #[doc = "Request URL that can be used to query next page of containers. Returned when total number of requested containers exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2966,7 +3032,11 @@ impl ListQueueProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListQueueResource {
     #[doc = "List of queues returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ListQueue>,
     #[doc = "Request URL that can be used to list next page of queues"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2986,7 +3056,11 @@ impl ListQueueResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListQueueServices {
     #[doc = "List of queue services returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueueServiceProperties>,
 }
 impl ListQueueServices {
@@ -3010,7 +3084,11 @@ impl ListServiceSasResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListTableResource {
     #[doc = "List of tables returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Table>,
     #[doc = "Request URL that can be used to query next page of tables"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3030,7 +3108,11 @@ impl ListTableResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListTableServices {
     #[doc = "List of table services returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TableServiceProperties>,
 }
 impl ListTableServices {
@@ -3074,7 +3156,12 @@ impl LocalUserKeys {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocalUserProperties {
     #[doc = "The permission scopes of the local user."]
-    #[serde(rename = "permissionScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "permissionScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permission_scopes: Vec<PermissionScope>,
     #[doc = "Optional, local user home directory."]
     #[serde(rename = "homeDirectory", default, skip_serializing_if = "Option::is_none")]
@@ -3116,7 +3203,11 @@ impl LocalUserRegeneratePasswordResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocalUsers {
     #[doc = "The local users associated with the storage account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LocalUser>,
 }
 impl azure_core::Continuable for LocalUsers {
@@ -3201,13 +3292,23 @@ impl ManagementPolicyDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ManagementPolicyFilter {
     #[doc = "An array of strings for prefixes to be match."]
-    #[serde(rename = "prefixMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "prefixMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub prefix_match: Vec<String>,
     #[doc = "An array of predefined enum values. Currently blockBlob supports all tiering and delete actions. Only delete actions are supported for appendBlob."]
     #[serde(rename = "blobTypes")]
     pub blob_types: Vec<String>,
     #[doc = "An array of blob index tag based filters, there can be at most 10 tag filters"]
-    #[serde(rename = "blobIndexMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobIndexMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_index_match: Vec<TagFilter>,
 }
 impl ManagementPolicyFilter {
@@ -3361,7 +3462,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Dimensions of blobs, including blob type and access tier."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Aggregation type could be Average."]
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -3400,13 +3505,28 @@ pub struct NetworkRuleSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub bypass: Option<network_rule_set::Bypass>,
     #[doc = "Sets the resource access rules"]
-    #[serde(rename = "resourceAccessRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceAccessRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_access_rules: Vec<ResourceAccessRule>,
     #[doc = "Sets the virtual network rules"]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "Sets the IP ACL rules"]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
     #[doc = "Specifies the default action of allow or deny when no other rules match."]
     #[serde(rename = "defaultAction")]
@@ -3487,7 +3607,11 @@ pub mod network_rule_set {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ObjectReplicationPolicies {
     #[doc = "The replication policy between two storage accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ObjectReplicationPolicy>,
 }
 impl azure_core::Continuable for ObjectReplicationPolicies {
@@ -3519,7 +3643,12 @@ impl ObjectReplicationPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ObjectReplicationPolicyFilter {
     #[doc = "Optional. Filters the results to replicate only blobs whose names begin with the specified prefix."]
-    #[serde(rename = "prefixMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "prefixMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub prefix_match: Vec<String>,
     #[doc = "Blobs created after the time will be replicated to the destination. It must be in datetime format 'yyyy-MM-ddTHH:mm:ssZ'. Example: 2020-02-19T16:05:00Z"]
     #[serde(rename = "minCreationTime", default, skip_serializing_if = "Option::is_none")]
@@ -3546,7 +3675,11 @@ pub struct ObjectReplicationPolicyProperties {
     #[serde(rename = "destinationAccount")]
     pub destination_account: String,
     #[doc = "The storage account object replication rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ObjectReplicationPolicyRule>,
 }
 impl ObjectReplicationPolicyProperties {
@@ -3635,7 +3768,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Storage operations supported by the Storage resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -3710,7 +3847,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -3844,7 +3985,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -3859,10 +4004,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -4034,7 +4189,11 @@ pub struct Restriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for the restriction. As of now this can be \"QuotaId\" or \"NotAvailableForSubscription\". Quota Id is set when the SKU has requiredQuotas parameter as the subscription does not belong to that quota. The \"NotAvailableForSubscription\" is related to capacity at DC."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -4418,7 +4577,12 @@ pub mod service_sas_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -4469,13 +4633,25 @@ pub struct SkuInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kind: Option<sku_information::Kind>,
     #[doc = "The set of locations that the SKU is available. This will be supported and registered Azure Geo Regions (e.g. West US, East US, Southeast Asia, etc.)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The capability information in the specified SKU, including file encryption, network ACLs, change notification, etc."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<Restriction>,
 }
 impl SkuInformation {
@@ -4871,7 +5047,11 @@ pub mod storage_account_key {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountListKeysResult {
     #[doc = "Gets the list of storage account keys and their properties for the specified storage account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<StorageAccountKey>,
 }
 impl StorageAccountListKeysResult {
@@ -4883,7 +5063,11 @@ impl StorageAccountListKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountListResult {
     #[doc = "Gets the list of storage accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccount>,
     #[doc = "Request URL that can be used to query next page of storage accounts. Returned when total number of requested storage accounts exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5003,7 +5187,12 @@ pub struct StorageAccountProperties {
     #[serde(rename = "largeFileSharesState", default, skip_serializing_if = "Option::is_none")]
     pub large_file_shares_state: Option<storage_account_properties::LargeFileSharesState>,
     #[doc = "List of private endpoint connection associated with the specified storage account"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Routing preference defines the type of network, either microsoft or internet routing to be used to deliver the user data, the default option is microsoft routing"]
     #[serde(rename = "routingPreference", default, skip_serializing_if = "Option::is_none")]
@@ -5799,7 +5988,11 @@ impl StorageQueue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageSkuListResult {
     #[doc = "Get the list result of storage SKUs and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuInformation>,
 }
 impl azure_core::Continuable for StorageSkuListResult {
@@ -6047,7 +6240,11 @@ pub mod usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "Gets or sets the list of Storage Resource Usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResult {
diff --git a/services/mgmt/storage/src/package_2021_09/models.rs b/services/mgmt/storage/src/package_2021_09/models.rs
index b76ac04618..72310929e3 100644
--- a/services/mgmt/storage/src/package_2021_09/models.rs
+++ b/services/mgmt/storage/src/package_2021_09/models.rs
@@ -649,13 +649,28 @@ pub mod blob_inventory_policy_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobInventoryPolicyFilter {
     #[doc = "An array of strings with maximum 10 blob prefixes to be included in the inventory."]
-    #[serde(rename = "prefixMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "prefixMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub prefix_match: Vec<String>,
     #[doc = "An array of strings with maximum 10 blob prefixes to be excluded from the inventory."]
-    #[serde(rename = "excludePrefix", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludePrefix",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude_prefix: Vec<String>,
     #[doc = "An array of predefined enum values. Valid values include blockBlob, appendBlob, pageBlob. Hns accounts does not support pageBlobs. This field is required when definition.objectType property is set to 'Blob'."]
-    #[serde(rename = "blobTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_types: Vec<String>,
     #[doc = "Includes blob versions in blob inventory when value is set to true. The definition.schemaFields values 'VersionId and IsCurrentVersion' are required if this property is set to true, else they must be excluded."]
     #[serde(rename = "includeBlobVersions", default, skip_serializing_if = "Option::is_none")]
@@ -872,7 +887,11 @@ pub mod blob_restore_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobServiceItems {
     #[doc = "List of blob services returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BlobServiceProperties>,
 }
 impl azure_core::Continuable for BlobServiceItems {
@@ -1015,7 +1034,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -1256,7 +1279,12 @@ impl CorsRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CorsRules {
     #[doc = "The List of CORS rules. You can include up to five CorsRule elements in the request. "]
-    #[serde(rename = "corsRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "corsRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors_rules: Vec<CorsRule>,
 }
 impl CorsRules {
@@ -1356,7 +1384,11 @@ impl DeletedAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedAccountListResult {
     #[doc = "Gets the list of deleted accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedAccount>,
     #[doc = "Request URL that can be used to query next page of deleted accounts. Returned when total number of requested deleted accounts exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1558,7 +1590,11 @@ impl EncryptionScopeKeyVaultProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EncryptionScopeListResult {
     #[doc = "List of encryption scopes requested."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EncryptionScope>,
     #[doc = "Request URL that can be used to query next page of encryption scopes. Returned when total number of requested encryption scopes exceeds the maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1879,7 +1915,11 @@ impl Serialize for ExtendedLocationType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileServiceItems {
     #[doc = "List of file services returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FileServiceProperties>,
 }
 impl FileServiceItems {
@@ -1957,7 +1997,11 @@ impl FileShareItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileShareItems {
     #[doc = "List of file shares returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FileShareItem>,
     #[doc = "Request URL that can be used to query next page of shares. Returned when total number of requested shares exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2026,7 +2070,12 @@ pub struct FileShareProperties {
     #[serde(rename = "leaseDuration", default, skip_serializing_if = "Option::is_none")]
     pub lease_duration: Option<file_share_properties::LeaseDuration>,
     #[doc = "List of stored access policies specified on the share."]
-    #[serde(rename = "signedIdentifiers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "signedIdentifiers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub signed_identifiers: Vec<SignedIdentifier>,
     #[doc = "Creation time of share snapshot returned in the response of list shares with expand param \"snapshots\"."]
     #[serde(rename = "snapshotTime", default, with = "azure_core::date::rfc3339::option")]
@@ -2460,7 +2509,12 @@ pub struct ImmutabilityPolicyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "The ImmutabilityPolicy update history of the blob container."]
-    #[serde(rename = "updateHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "updateHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub update_history: Vec<UpdateHistoryProperty>,
 }
 impl ImmutabilityPolicyProperties {
@@ -2672,7 +2726,12 @@ pub struct LastAccessTimeTrackingPolicy {
     #[serde(rename = "trackingGranularityInDays", default, skip_serializing_if = "Option::is_none")]
     pub tracking_granularity_in_days: Option<i32>,
     #[doc = "An array of predefined supported blob types. Only blockBlob is the supported value. This field is currently read only"]
-    #[serde(rename = "blobType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_type: Vec<String>,
 }
 impl LastAccessTimeTrackingPolicy {
@@ -2897,7 +2956,11 @@ pub struct LegalHoldProperties {
     #[serde(rename = "hasLegalHold", default, skip_serializing_if = "Option::is_none")]
     pub has_legal_hold: Option<bool>,
     #[doc = "The list of LegalHold tags of a blob container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<TagProperty>,
     #[doc = "Protected append writes history setting for the blob container with Legal holds."]
     #[serde(rename = "protectedAppendWritesHistory", default, skip_serializing_if = "Option::is_none")]
@@ -2924,7 +2987,11 @@ impl ListAccountSasResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListBlobInventoryPolicy {
     #[doc = "List of blob inventory policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BlobInventoryPolicy>,
 }
 impl azure_core::Continuable for ListBlobInventoryPolicy {
@@ -2956,7 +3023,11 @@ impl ListContainerItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListContainerItems {
     #[doc = "List of blobs containers returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ListContainerItem>,
     #[doc = "Request URL that can be used to query next page of containers. Returned when total number of requested containers exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3000,7 +3071,11 @@ impl ListQueueProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListQueueResource {
     #[doc = "List of queues returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ListQueue>,
     #[doc = "Request URL that can be used to list next page of queues"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3020,7 +3095,11 @@ impl ListQueueResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListQueueServices {
     #[doc = "List of queue services returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueueServiceProperties>,
 }
 impl ListQueueServices {
@@ -3044,7 +3123,11 @@ impl ListServiceSasResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListTableResource {
     #[doc = "List of tables returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Table>,
     #[doc = "Request URL that can be used to query next page of tables"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3064,7 +3147,11 @@ impl ListTableResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListTableServices {
     #[doc = "List of table services returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TableServiceProperties>,
 }
 impl ListTableServices {
@@ -3108,7 +3195,12 @@ impl LocalUserKeys {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocalUserProperties {
     #[doc = "The permission scopes of the local user."]
-    #[serde(rename = "permissionScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "permissionScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permission_scopes: Vec<PermissionScope>,
     #[doc = "Optional, local user home directory."]
     #[serde(rename = "homeDirectory", default, skip_serializing_if = "Option::is_none")]
@@ -3150,7 +3242,11 @@ impl LocalUserRegeneratePasswordResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocalUsers {
     #[doc = "The local users associated with the storage account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LocalUser>,
 }
 impl azure_core::Continuable for LocalUsers {
@@ -3235,13 +3331,23 @@ impl ManagementPolicyDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ManagementPolicyFilter {
     #[doc = "An array of strings for prefixes to be match."]
-    #[serde(rename = "prefixMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "prefixMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub prefix_match: Vec<String>,
     #[doc = "An array of predefined enum values. Currently blockBlob supports all tiering and delete actions. Only delete actions are supported for appendBlob."]
     #[serde(rename = "blobTypes")]
     pub blob_types: Vec<String>,
     #[doc = "An array of blob index tag based filters, there can be at most 10 tag filters"]
-    #[serde(rename = "blobIndexMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobIndexMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_index_match: Vec<TagFilter>,
 }
 impl ManagementPolicyFilter {
@@ -3395,7 +3501,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Dimensions of blobs, including blob type and access tier."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Aggregation type could be Average."]
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -3434,13 +3544,28 @@ pub struct NetworkRuleSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub bypass: Option<network_rule_set::Bypass>,
     #[doc = "Sets the resource access rules"]
-    #[serde(rename = "resourceAccessRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceAccessRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_access_rules: Vec<ResourceAccessRule>,
     #[doc = "Sets the virtual network rules"]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "Sets the IP ACL rules"]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
     #[doc = "Specifies the default action of allow or deny when no other rules match."]
     #[serde(rename = "defaultAction")]
@@ -3521,7 +3646,11 @@ pub mod network_rule_set {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ObjectReplicationPolicies {
     #[doc = "The replication policy between two storage accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ObjectReplicationPolicy>,
 }
 impl azure_core::Continuable for ObjectReplicationPolicies {
@@ -3553,7 +3682,12 @@ impl ObjectReplicationPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ObjectReplicationPolicyFilter {
     #[doc = "Optional. Filters the results to replicate only blobs whose names begin with the specified prefix."]
-    #[serde(rename = "prefixMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "prefixMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub prefix_match: Vec<String>,
     #[doc = "Blobs created after the time will be replicated to the destination. It must be in datetime format 'yyyy-MM-ddTHH:mm:ssZ'. Example: 2020-02-19T16:05:00Z"]
     #[serde(rename = "minCreationTime", default, skip_serializing_if = "Option::is_none")]
@@ -3580,7 +3714,11 @@ pub struct ObjectReplicationPolicyProperties {
     #[serde(rename = "destinationAccount")]
     pub destination_account: String,
     #[doc = "The storage account object replication rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ObjectReplicationPolicyRule>,
 }
 impl ObjectReplicationPolicyProperties {
@@ -3669,7 +3807,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Storage operations supported by the Storage resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -3744,7 +3886,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -3878,7 +4024,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -3893,10 +4043,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -4068,7 +4228,11 @@ pub struct Restriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for the restriction. As of now this can be \"QuotaId\" or \"NotAvailableForSubscription\". Quota Id is set when the SKU has requiredQuotas parameter as the subscription does not belong to that quota. The \"NotAvailableForSubscription\" is related to capacity at DC."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -4452,7 +4616,12 @@ pub mod service_sas_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -4503,13 +4672,25 @@ pub struct SkuInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kind: Option<sku_information::Kind>,
     #[doc = "The set of locations that the SKU is available. This will be supported and registered Azure Geo Regions (e.g. West US, East US, Southeast Asia, etc.)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The capability information in the specified SKU, including file encryption, network ACLs, change notification, etc."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<Restriction>,
 }
 impl SkuInformation {
@@ -4905,7 +5086,11 @@ pub mod storage_account_key {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountListKeysResult {
     #[doc = "Gets the list of storage account keys and their properties for the specified storage account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<StorageAccountKey>,
 }
 impl StorageAccountListKeysResult {
@@ -4917,7 +5102,11 @@ impl StorageAccountListKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountListResult {
     #[doc = "Gets the list of storage accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccount>,
     #[doc = "Request URL that can be used to query next page of storage accounts. Returned when total number of requested storage accounts exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5037,7 +5226,12 @@ pub struct StorageAccountProperties {
     #[serde(rename = "largeFileSharesState", default, skip_serializing_if = "Option::is_none")]
     pub large_file_shares_state: Option<storage_account_properties::LargeFileSharesState>,
     #[doc = "List of private endpoint connection associated with the specified storage account"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Routing preference defines the type of network, either microsoft or internet routing to be used to deliver the user data, the default option is microsoft routing"]
     #[serde(rename = "routingPreference", default, skip_serializing_if = "Option::is_none")]
@@ -6022,7 +6216,11 @@ impl StorageQueue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageSkuListResult {
     #[doc = "Get the list result of storage SKUs and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuInformation>,
 }
 impl azure_core::Continuable for StorageSkuListResult {
@@ -6076,7 +6274,12 @@ pub struct TableProperties {
     #[serde(rename = "tableName", default, skip_serializing_if = "Option::is_none")]
     pub table_name: Option<String>,
     #[doc = "List of stored access policies specified on the table."]
-    #[serde(rename = "signedIdentifiers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "signedIdentifiers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub signed_identifiers: Vec<TableSignedIdentifier>,
 }
 impl TableProperties {
@@ -6308,7 +6511,11 @@ pub mod usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "Gets or sets the list of Storage Resource Usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResult {
diff --git a/services/mgmt/storage/src/package_2022_05/models.rs b/services/mgmt/storage/src/package_2022_05/models.rs
index 49ddebe812..8601eea583 100644
--- a/services/mgmt/storage/src/package_2022_05/models.rs
+++ b/services/mgmt/storage/src/package_2022_05/models.rs
@@ -676,13 +676,28 @@ pub mod blob_inventory_policy_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobInventoryPolicyFilter {
     #[doc = "An array of strings with maximum 10 blob prefixes to be included in the inventory."]
-    #[serde(rename = "prefixMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "prefixMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub prefix_match: Vec<String>,
     #[doc = "An array of strings with maximum 10 blob prefixes to be excluded from the inventory."]
-    #[serde(rename = "excludePrefix", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludePrefix",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude_prefix: Vec<String>,
     #[doc = "An array of predefined enum values. Valid values include blockBlob, appendBlob, pageBlob. Hns accounts does not support pageBlobs. This field is required when definition.objectType property is set to 'Blob'."]
-    #[serde(rename = "blobTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_types: Vec<String>,
     #[doc = "Includes blob versions in blob inventory when value is set to true. The definition.schemaFields values 'VersionId and IsCurrentVersion' are required if this property is set to true, else they must be excluded."]
     #[serde(rename = "includeBlobVersions", default, skip_serializing_if = "Option::is_none")]
@@ -899,7 +914,11 @@ pub mod blob_restore_status {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobServiceItems {
     #[doc = "List of blob services returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BlobServiceProperties>,
 }
 impl azure_core::Continuable for BlobServiceItems {
@@ -1042,7 +1061,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -1283,7 +1306,12 @@ impl CorsRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CorsRules {
     #[doc = "The List of CORS rules. You can include up to five CorsRule elements in the request. "]
-    #[serde(rename = "corsRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "corsRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cors_rules: Vec<CorsRule>,
 }
 impl CorsRules {
@@ -1383,7 +1411,11 @@ impl DeletedAccount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedAccountListResult {
     #[doc = "Gets the list of deleted accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedAccount>,
     #[doc = "Request URL that can be used to query next page of deleted accounts. Returned when total number of requested deleted accounts exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1579,7 +1611,11 @@ impl EncryptionScopeKeyVaultProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EncryptionScopeListResult {
     #[doc = "List of encryption scopes requested."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EncryptionScope>,
     #[doc = "Request URL that can be used to query next page of encryption scopes. Returned when total number of requested encryption scopes exceeds the maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1900,7 +1936,11 @@ impl Serialize for ExtendedLocationType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileServiceItems {
     #[doc = "List of file services returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FileServiceProperties>,
 }
 impl FileServiceItems {
@@ -1978,7 +2018,11 @@ impl FileShareItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileShareItems {
     #[doc = "List of file shares returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FileShareItem>,
     #[doc = "Request URL that can be used to query next page of shares. Returned when total number of requested shares exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2047,7 +2091,12 @@ pub struct FileShareProperties {
     #[serde(rename = "leaseDuration", default, skip_serializing_if = "Option::is_none")]
     pub lease_duration: Option<file_share_properties::LeaseDuration>,
     #[doc = "List of stored access policies specified on the share."]
-    #[serde(rename = "signedIdentifiers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "signedIdentifiers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub signed_identifiers: Vec<SignedIdentifier>,
     #[doc = "Creation time of share snapshot returned in the response of list shares with expand param \"snapshots\"."]
     #[serde(rename = "snapshotTime", default, with = "azure_core::date::rfc3339::option")]
@@ -2481,7 +2530,12 @@ pub struct ImmutabilityPolicyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "The ImmutabilityPolicy update history of the blob container."]
-    #[serde(rename = "updateHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "updateHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub update_history: Vec<UpdateHistoryProperty>,
 }
 impl ImmutabilityPolicyProperties {
@@ -2693,7 +2747,12 @@ pub struct LastAccessTimeTrackingPolicy {
     #[serde(rename = "trackingGranularityInDays", default, skip_serializing_if = "Option::is_none")]
     pub tracking_granularity_in_days: Option<i32>,
     #[doc = "An array of predefined supported blob types. Only blockBlob is the supported value. This field is currently read only"]
-    #[serde(rename = "blobType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_type: Vec<String>,
 }
 impl LastAccessTimeTrackingPolicy {
@@ -2952,7 +3011,11 @@ pub struct LegalHoldProperties {
     #[serde(rename = "hasLegalHold", default, skip_serializing_if = "Option::is_none")]
     pub has_legal_hold: Option<bool>,
     #[doc = "The list of LegalHold tags of a blob container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<TagProperty>,
     #[doc = "Protected append writes history setting for the blob container with Legal holds."]
     #[serde(rename = "protectedAppendWritesHistory", default, skip_serializing_if = "Option::is_none")]
@@ -2979,7 +3042,11 @@ impl ListAccountSasResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListBlobInventoryPolicy {
     #[doc = "List of blob inventory policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BlobInventoryPolicy>,
 }
 impl azure_core::Continuable for ListBlobInventoryPolicy {
@@ -3011,7 +3078,11 @@ impl ListContainerItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListContainerItems {
     #[doc = "List of blobs containers returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ListContainerItem>,
     #[doc = "Request URL that can be used to query next page of containers. Returned when total number of requested containers exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3055,7 +3126,11 @@ impl ListQueueProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListQueueResource {
     #[doc = "List of queues returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ListQueue>,
     #[doc = "Request URL that can be used to list next page of queues"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3075,7 +3150,11 @@ impl ListQueueResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListQueueServices {
     #[doc = "List of queue services returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<QueueServiceProperties>,
 }
 impl ListQueueServices {
@@ -3099,7 +3178,11 @@ impl ListServiceSasResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListTableResource {
     #[doc = "List of tables returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Table>,
     #[doc = "Request URL that can be used to query next page of tables"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3119,7 +3202,11 @@ impl ListTableResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListTableServices {
     #[doc = "List of table services returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TableServiceProperties>,
 }
 impl ListTableServices {
@@ -3163,7 +3250,12 @@ impl LocalUserKeys {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocalUserProperties {
     #[doc = "The permission scopes of the local user."]
-    #[serde(rename = "permissionScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "permissionScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permission_scopes: Vec<PermissionScope>,
     #[doc = "Optional, local user home directory."]
     #[serde(rename = "homeDirectory", default, skip_serializing_if = "Option::is_none")]
@@ -3205,7 +3297,11 @@ impl LocalUserRegeneratePasswordResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocalUsers {
     #[doc = "The local users associated with the storage account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LocalUser>,
 }
 impl azure_core::Continuable for LocalUsers {
@@ -3290,13 +3386,23 @@ impl ManagementPolicyDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ManagementPolicyFilter {
     #[doc = "An array of strings for prefixes to be match."]
-    #[serde(rename = "prefixMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "prefixMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub prefix_match: Vec<String>,
     #[doc = "An array of predefined enum values. Currently blockBlob supports all tiering and delete actions. Only delete actions are supported for appendBlob."]
     #[serde(rename = "blobTypes")]
     pub blob_types: Vec<String>,
     #[doc = "An array of blob index tag based filters, there can be at most 10 tag filters"]
-    #[serde(rename = "blobIndexMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobIndexMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_index_match: Vec<TagFilter>,
 }
 impl ManagementPolicyFilter {
@@ -3450,7 +3556,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Dimensions of blobs, including blob type and access tier."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Aggregation type could be Average."]
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -3489,13 +3599,28 @@ pub struct NetworkRuleSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub bypass: Option<network_rule_set::Bypass>,
     #[doc = "Sets the resource access rules"]
-    #[serde(rename = "resourceAccessRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceAccessRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_access_rules: Vec<ResourceAccessRule>,
     #[doc = "Sets the virtual network rules"]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "Sets the IP ACL rules"]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
     #[doc = "Specifies the default action of allow or deny when no other rules match."]
     #[serde(rename = "defaultAction")]
@@ -3576,7 +3701,11 @@ pub mod network_rule_set {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ObjectReplicationPolicies {
     #[doc = "The replication policy between two storage accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ObjectReplicationPolicy>,
 }
 impl azure_core::Continuable for ObjectReplicationPolicies {
@@ -3608,7 +3737,12 @@ impl ObjectReplicationPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ObjectReplicationPolicyFilter {
     #[doc = "Optional. Filters the results to replicate only blobs whose names begin with the specified prefix."]
-    #[serde(rename = "prefixMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "prefixMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub prefix_match: Vec<String>,
     #[doc = "Blobs created after the time will be replicated to the destination. It must be in datetime format 'yyyy-MM-ddTHH:mm:ssZ'. Example: 2020-02-19T16:05:00Z"]
     #[serde(rename = "minCreationTime", default, skip_serializing_if = "Option::is_none")]
@@ -3635,7 +3769,11 @@ pub struct ObjectReplicationPolicyProperties {
     #[serde(rename = "destinationAccount")]
     pub destination_account: String,
     #[doc = "The storage account object replication rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ObjectReplicationPolicyRule>,
 }
 impl ObjectReplicationPolicyProperties {
@@ -3724,7 +3862,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Storage operations supported by the Storage resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -3799,7 +3941,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -3933,7 +4079,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -3948,10 +4098,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -4123,7 +4283,11 @@ pub struct Restriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for the restriction. As of now this can be \"QuotaId\" or \"NotAvailableForSubscription\". Quota Id is set when the SKU has requiredQuotas parameter as the subscription does not belong to that quota. The \"NotAvailableForSubscription\" is related to capacity at DC."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -4507,7 +4671,12 @@ pub mod service_sas_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -4558,13 +4727,25 @@ pub struct SkuInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kind: Option<sku_information::Kind>,
     #[doc = "The set of locations that the SKU is available. This will be supported and registered Azure Geo Regions (e.g. West US, East US, Southeast Asia, etc.)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The capability information in the specified SKU, including file encryption, network ACLs, change notification, etc."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<Restriction>,
 }
 impl SkuInformation {
@@ -4960,7 +5141,11 @@ pub mod storage_account_key {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountListKeysResult {
     #[doc = "Gets the list of storage account keys and their properties for the specified storage account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<StorageAccountKey>,
 }
 impl StorageAccountListKeysResult {
@@ -4972,7 +5157,11 @@ impl StorageAccountListKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountListResult {
     #[doc = "Gets the list of storage accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccount>,
     #[doc = "Request URL that can be used to query next page of storage accounts. Returned when total number of requested storage accounts exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5092,7 +5281,12 @@ pub struct StorageAccountProperties {
     #[serde(rename = "largeFileSharesState", default, skip_serializing_if = "Option::is_none")]
     pub large_file_shares_state: Option<storage_account_properties::LargeFileSharesState>,
     #[doc = "List of private endpoint connection associated with the specified storage account"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Routing preference defines the type of network, either microsoft or internet routing to be used to deliver the user data, the default option is microsoft routing"]
     #[serde(rename = "routingPreference", default, skip_serializing_if = "Option::is_none")]
@@ -6077,7 +6271,11 @@ impl StorageQueue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageSkuListResult {
     #[doc = "Get the list result of storage SKUs and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuInformation>,
 }
 impl azure_core::Continuable for StorageSkuListResult {
@@ -6131,7 +6329,12 @@ pub struct TableProperties {
     #[serde(rename = "tableName", default, skip_serializing_if = "Option::is_none")]
     pub table_name: Option<String>,
     #[doc = "List of stored access policies specified on the table."]
-    #[serde(rename = "signedIdentifiers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "signedIdentifiers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub signed_identifiers: Vec<TableSignedIdentifier>,
 }
 impl TableProperties {
@@ -6363,7 +6566,11 @@ pub mod usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "Gets or sets the list of Storage Resource Usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResult {
diff --git a/services/mgmt/storage/src/profile_hybrid_2020_09_01/models.rs b/services/mgmt/storage/src/profile_hybrid_2020_09_01/models.rs
index 54abc8a8ae..4d45d3d8d9 100644
--- a/services/mgmt/storage/src/profile_hybrid_2020_09_01/models.rs
+++ b/services/mgmt/storage/src/profile_hybrid_2020_09_01/models.rs
@@ -340,7 +340,12 @@ impl BlobInventoryPolicyDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct BlobInventoryPolicyFilter {
     #[doc = "An array of strings for blob prefixes to be matched."]
-    #[serde(rename = "prefixMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "prefixMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub prefix_match: Vec<String>,
     #[doc = "An array of predefined enum values. Valid values include blockBlob, appendBlob, pageBlob. Hns accounts does not support pageBlobs."]
     #[serde(rename = "blobTypes")]
@@ -742,7 +747,11 @@ impl EncryptionScopeKeyVaultProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EncryptionScopeListResult {
     #[doc = "List of encryption scopes requested."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EncryptionScope>,
     #[doc = "Request URL that can be used to query next page of encryption scopes. Returned when total number of requested encryption scopes exceeds the maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1164,7 +1173,11 @@ impl ListAccountSasResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListBlobInventoryPolicy {
     #[doc = "List of blob inventory policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BlobInventoryPolicy>,
 }
 impl azure_core::Continuable for ListBlobInventoryPolicy {
@@ -1261,13 +1274,23 @@ impl ManagementPolicyDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ManagementPolicyFilter {
     #[doc = "An array of strings for prefixes to be match."]
-    #[serde(rename = "prefixMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "prefixMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub prefix_match: Vec<String>,
     #[doc = "An array of predefined enum values. Currently blockBlob supports all tiering and delete actions. Only delete actions are supported for appendBlob."]
     #[serde(rename = "blobTypes")]
     pub blob_types: Vec<String>,
     #[doc = "An array of blob index tag based filters, there can be at most 10 tag filters"]
-    #[serde(rename = "blobIndexMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blobIndexMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_index_match: Vec<TagFilter>,
 }
 impl ManagementPolicyFilter {
@@ -1421,7 +1444,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Dimensions of blobs, including blob type and access tier."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Aggregation type could be Average."]
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
@@ -1448,10 +1475,20 @@ pub struct NetworkRuleSet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub bypass: Option<network_rule_set::Bypass>,
     #[doc = "Sets the virtual network rules"]
-    #[serde(rename = "virtualNetworkRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworkRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_network_rules: Vec<VirtualNetworkRule>,
     #[doc = "Sets the IP ACL rules"]
-    #[serde(rename = "ipRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_rules: Vec<IpRule>,
     #[doc = "Specifies the default action of allow or deny when no other rules match."]
     #[serde(rename = "defaultAction")]
@@ -1531,7 +1568,11 @@ pub mod network_rule_set {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ObjectReplicationPolicies {
     #[doc = "The replication policy between two storage accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ObjectReplicationPolicy>,
 }
 impl azure_core::Continuable for ObjectReplicationPolicies {
@@ -1563,7 +1604,12 @@ impl ObjectReplicationPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ObjectReplicationPolicyFilter {
     #[doc = "Optional. Filters the results to replicate only blobs whose names begin with the specified prefix."]
-    #[serde(rename = "prefixMatch", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "prefixMatch",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub prefix_match: Vec<String>,
     #[doc = "Blobs created after the time will be replicated to the destination. It must be in datetime format 'yyyy-MM-ddTHH:mm:ssZ'. Example: 2020-02-19T16:05:00Z"]
     #[serde(rename = "minCreationTime", default, skip_serializing_if = "Option::is_none")]
@@ -1590,7 +1636,11 @@ pub struct ObjectReplicationPolicyProperties {
     #[serde(rename = "destinationAccount")]
     pub destination_account: String,
     #[doc = "The storage account object replication rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ObjectReplicationPolicyRule>,
 }
 impl ObjectReplicationPolicyProperties {
@@ -1679,7 +1729,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Storage operations supported by the Storage resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
@@ -1735,7 +1789,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -1869,7 +1927,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -1884,10 +1946,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1938,7 +2010,11 @@ pub struct Restriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for the restriction. As of now this can be \"QuotaId\" or \"NotAvailableForSubscription\". Quota Id is set when the SKU has requiredQuotas parameter as the subscription does not belong to that quota. The \"NotAvailableForSubscription\" is related to capacity at DC."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -2261,7 +2337,12 @@ pub mod service_sas_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -2298,13 +2379,25 @@ pub struct SkuInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kind: Option<sku_information::Kind>,
     #[doc = "The set of locations that the SKU is available. This will be supported and registered Azure Geo Regions (e.g. West US, East US, Southeast Asia, etc.)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The capability information in the specified SKU, including file encryption, network ACLs, change notification, etc."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<Restriction>,
 }
 impl SkuInformation {
@@ -2650,7 +2743,11 @@ pub mod storage_account_key {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountListKeysResult {
     #[doc = "Gets the list of storage account keys and their properties for the specified storage account."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<StorageAccountKey>,
 }
 impl StorageAccountListKeysResult {
@@ -2662,7 +2759,11 @@ impl StorageAccountListKeysResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageAccountListResult {
     #[doc = "Gets the list of storage accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccount>,
     #[doc = "Request URL that can be used to query next page of storage accounts. Returned when total number of requested storage accounts exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2767,7 +2868,12 @@ pub struct StorageAccountProperties {
     #[serde(rename = "largeFileSharesState", default, skip_serializing_if = "Option::is_none")]
     pub large_file_shares_state: Option<storage_account_properties::LargeFileSharesState>,
     #[doc = "List of private endpoint connection associated with the specified storage account"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Routing preference defines the type of network, either microsoft or internet routing to be used to deliver the user data, the default option is microsoft routing"]
     #[serde(rename = "routingPreference", default, skip_serializing_if = "Option::is_none")]
@@ -3251,7 +3357,11 @@ pub mod storage_account_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageSkuListResult {
     #[doc = "Get the list result of storage SKUs and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuInformation>,
 }
 impl azure_core::Continuable for StorageSkuListResult {
@@ -3344,7 +3454,11 @@ pub mod usage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UsageListResult {
     #[doc = "Gets or sets the list of Storage Resource Usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResult {
diff --git a/services/mgmt/storagecache/src/package_2021_03/models.rs b/services/mgmt/storagecache/src/package_2021_03/models.rs
index c4c17ea2fc..43525c5c07 100644
--- a/services/mgmt/storagecache/src/package_2021_03/models.rs
+++ b/services/mgmt/storagecache/src/package_2021_03/models.rs
@@ -68,7 +68,12 @@ pub mod api_operation {
         #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
         pub struct ServiceSpecification {
             #[doc = "Details about operations related to metrics."]
-            #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                rename = "metricSpecifications",
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub metric_specifications: Vec<MetricSpecification>,
         }
         impl ServiceSpecification {
@@ -85,7 +90,11 @@ pub struct ApiOperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Resource Provider operations supported by the Microsoft.StorageCache resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiOperation>,
 }
 impl azure_core::Continuable for ApiOperationListResult {
@@ -204,7 +213,12 @@ pub mod cache {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub health: Option<CacheHealth>,
         #[doc = "Array of IP addresses that can be used by clients mounting this Cache."]
-        #[serde(rename = "mountAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "mountAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub mount_addresses: Vec<String>,
         #[doc = "ARM provisioning state, see https://github.com/Azure/azure-resource-manager-rpc/blob/master/v1.0/Addendum.md#provisioningstate-property"]
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -424,7 +438,11 @@ pub struct CacheHealth {
     #[serde(rename = "statusDescription", default, skip_serializing_if = "Option::is_none")]
     pub status_description: Option<String>,
     #[doc = "Outstanding conditions that need to be investigated and resolved."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<Condition>,
 }
 impl CacheHealth {
@@ -520,10 +538,20 @@ pub struct CacheNetworkSettings {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub mtu: Option<i32>,
     #[doc = "Array of additional IP addresses used by this Cache."]
-    #[serde(rename = "utilityAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "utilityAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub utility_addresses: Vec<String>,
     #[doc = "DNS servers for the cache to use.  It will be set from the network configuration if no value is provided."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
     #[doc = "DNS search domain"]
     #[serde(rename = "dnsSearchDomain", default, skip_serializing_if = "Option::is_none")]
@@ -541,7 +569,12 @@ impl CacheNetworkSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CacheSecuritySettings {
     #[doc = "NFS access policies defined for this cache."]
-    #[serde(rename = "accessPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_policies: Vec<NfsAccessPolicy>,
 }
 impl CacheSecuritySettings {
@@ -772,7 +805,11 @@ pub struct CachesListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Caches."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cache>,
 }
 impl azure_core::Continuable for CachesListResult {
@@ -823,7 +860,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
     #[doc = "A message describing the error, intended to be suitable for display in a user interface."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -937,13 +978,22 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Support metric aggregation type."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Type of metrics."]
     #[serde(rename = "metricClass", default, skip_serializing_if = "Option::is_none")]
     pub metric_class: Option<String>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
 }
 impl MetricSpecification {
@@ -1136,19 +1186,36 @@ pub struct ResourceSku {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "A list of capabilities of this SKU, such as throughput or ops/sec."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
     #[doc = "The set of locations where the SKU is available. This is the supported and registered Azure Geo Regions (e.g., West US, East US, Southeast Asia, etc.)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The set of locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "The name of this SKU."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The restrictions preventing this SKU from being used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<Restriction>,
 }
 impl ResourceSku {
@@ -1178,7 +1245,11 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "Zones if any."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuLocationInfo {
@@ -1193,7 +1264,11 @@ pub struct ResourceSkusResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of SKUs available for the subscription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceSku>,
 }
 impl azure_core::Continuable for ResourceSkusResult {
@@ -1214,7 +1289,11 @@ pub struct Restriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location, then this would be the different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for the restriction. As of now this can be \"QuotaId\" or \"NotAvailableForSubscription\". \"QuotaId\" is set when the SKU has requiredQuotas parameter as the subscription does not belong to that quota. \"NotAvailableForSubscription\" is related to capacity at the datacenter."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -1283,7 +1362,11 @@ impl StorageTarget {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct StorageTargetProperties {
     #[doc = "List of Cache namespace junctions to target for namespace associations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub junctions: Vec<NamespaceJunction>,
     #[doc = "Type of the Storage Target."]
     #[serde(rename = "targetType")]
@@ -1441,7 +1524,11 @@ pub struct StorageTargetsResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Storage Targets defined for the Cache."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageTarget>,
 }
 impl azure_core::Continuable for StorageTargetsResult {
@@ -1516,7 +1603,11 @@ pub struct UsageModelsResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of usage models available for the subscription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UsageModel>,
 }
 impl azure_core::Continuable for UsageModelsResult {
diff --git a/services/mgmt/storagecache/src/package_2021_05/models.rs b/services/mgmt/storagecache/src/package_2021_05/models.rs
index 7b612e5c54..ef7328a5a0 100644
--- a/services/mgmt/storagecache/src/package_2021_05/models.rs
+++ b/services/mgmt/storagecache/src/package_2021_05/models.rs
@@ -68,7 +68,12 @@ pub mod api_operation {
         #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
         pub struct ServiceSpecification {
             #[doc = "Details about operations related to metrics."]
-            #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                rename = "metricSpecifications",
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub metric_specifications: Vec<MetricSpecification>,
         }
         impl ServiceSpecification {
@@ -85,7 +90,11 @@ pub struct ApiOperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Resource Provider operations supported by the Microsoft.StorageCache resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiOperation>,
 }
 impl azure_core::Continuable for ApiOperationListResult {
@@ -204,7 +213,12 @@ pub mod cache {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub health: Option<CacheHealth>,
         #[doc = "Array of IP addresses that can be used by clients mounting this Cache."]
-        #[serde(rename = "mountAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "mountAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub mount_addresses: Vec<String>,
         #[doc = "ARM provisioning state, see https://github.com/Azure/azure-resource-manager-rpc/blob/master/v1.0/Addendum.md#provisioningstate-property"]
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -427,7 +441,11 @@ pub struct CacheHealth {
     #[serde(rename = "statusDescription", default, skip_serializing_if = "Option::is_none")]
     pub status_description: Option<String>,
     #[doc = "Outstanding conditions that need to be investigated and resolved."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<Condition>,
 }
 impl CacheHealth {
@@ -529,10 +547,20 @@ pub struct CacheNetworkSettings {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub mtu: Option<i32>,
     #[doc = "Array of additional IP addresses used by this Cache."]
-    #[serde(rename = "utilityAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "utilityAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub utility_addresses: Vec<String>,
     #[doc = "DNS servers for the cache to use.  It will be set from the network configuration if no value is provided."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
     #[doc = "DNS search domain"]
     #[serde(rename = "dnsSearchDomain", default, skip_serializing_if = "Option::is_none")]
@@ -550,7 +578,12 @@ impl CacheNetworkSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CacheSecuritySettings {
     #[doc = "NFS access policies defined for this cache."]
-    #[serde(rename = "accessPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_policies: Vec<NfsAccessPolicy>,
 }
 impl CacheSecuritySettings {
@@ -781,7 +814,11 @@ pub struct CachesListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Caches."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cache>,
 }
 impl azure_core::Continuable for CachesListResult {
@@ -832,7 +869,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
     #[doc = "A message describing the error, intended to be suitable for display in a user interface."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -946,13 +987,22 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Support metric aggregation type."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Type of metrics."]
     #[serde(rename = "metricClass", default, skip_serializing_if = "Option::is_none")]
     pub metric_class: Option<String>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
 }
 impl MetricSpecification {
@@ -1145,19 +1195,36 @@ pub struct ResourceSku {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "A list of capabilities of this SKU, such as throughput or ops/sec."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
     #[doc = "The set of locations where the SKU is available. This is the supported and registered Azure Geo Regions (e.g., West US, East US, Southeast Asia, etc.)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The set of locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "The name of this SKU."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The restrictions preventing this SKU from being used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<Restriction>,
 }
 impl ResourceSku {
@@ -1187,7 +1254,11 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "Zones if any."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuLocationInfo {
@@ -1202,7 +1273,11 @@ pub struct ResourceSkusResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of SKUs available for the subscription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceSku>,
 }
 impl azure_core::Continuable for ResourceSkusResult {
@@ -1223,7 +1298,11 @@ pub struct Restriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location, then this would be the different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for the restriction. As of now this can be \"QuotaId\" or \"NotAvailableForSubscription\". \"QuotaId\" is set when the SKU has requiredQuotas parameter as the subscription does not belong to that quota. \"NotAvailableForSubscription\" is related to capacity at the datacenter."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -1292,7 +1371,11 @@ impl StorageTarget {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct StorageTargetProperties {
     #[doc = "List of Cache namespace junctions to target for namespace associations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub junctions: Vec<NamespaceJunction>,
     #[doc = "Type of the Storage Target."]
     #[serde(rename = "targetType")]
@@ -1450,7 +1533,11 @@ pub struct StorageTargetsResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Storage Targets defined for the Cache."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageTarget>,
 }
 impl azure_core::Continuable for StorageTargetsResult {
@@ -1525,7 +1612,11 @@ pub struct UsageModelsResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of usage models available for the subscription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UsageModel>,
 }
 impl azure_core::Continuable for UsageModelsResult {
diff --git a/services/mgmt/storagecache/src/package_2021_09/models.rs b/services/mgmt/storagecache/src/package_2021_09/models.rs
index 7c1f9f0159..a834610aa8 100644
--- a/services/mgmt/storagecache/src/package_2021_09/models.rs
+++ b/services/mgmt/storagecache/src/package_2021_09/models.rs
@@ -68,7 +68,12 @@ pub mod api_operation {
         #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
         pub struct ServiceSpecification {
             #[doc = "Details about operations related to metrics."]
-            #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                rename = "metricSpecifications",
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub metric_specifications: Vec<MetricSpecification>,
         }
         impl ServiceSpecification {
@@ -85,7 +90,11 @@ pub struct ApiOperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Resource Provider operations supported by the Microsoft.StorageCache resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiOperation>,
 }
 impl azure_core::Continuable for ApiOperationListResult {
@@ -204,7 +213,12 @@ pub mod cache {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub health: Option<CacheHealth>,
         #[doc = "Array of IP addresses that can be used by clients mounting this Cache."]
-        #[serde(rename = "mountAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "mountAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub mount_addresses: Vec<String>,
         #[doc = "ARM provisioning state, see https://github.com/Azure/azure-resource-manager-rpc/blob/master/v1.0/Addendum.md#provisioningstate-property"]
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -427,7 +441,11 @@ pub struct CacheHealth {
     #[serde(rename = "statusDescription", default, skip_serializing_if = "Option::is_none")]
     pub status_description: Option<String>,
     #[doc = "Outstanding conditions that need to be investigated and resolved."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<Condition>,
 }
 impl CacheHealth {
@@ -529,10 +547,20 @@ pub struct CacheNetworkSettings {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub mtu: Option<i32>,
     #[doc = "Array of additional IP addresses used by this Cache."]
-    #[serde(rename = "utilityAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "utilityAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub utility_addresses: Vec<String>,
     #[doc = "DNS servers for the cache to use.  It will be set from the network configuration if no value is provided."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
     #[doc = "DNS search domain"]
     #[serde(rename = "dnsSearchDomain", default, skip_serializing_if = "Option::is_none")]
@@ -550,7 +578,12 @@ impl CacheNetworkSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CacheSecuritySettings {
     #[doc = "NFS access policies defined for this cache."]
-    #[serde(rename = "accessPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_policies: Vec<NfsAccessPolicy>,
 }
 impl CacheSecuritySettings {
@@ -781,7 +814,11 @@ pub struct CachesListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Caches."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cache>,
 }
 impl azure_core::Continuable for CachesListResult {
@@ -832,7 +869,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
     #[doc = "A message describing the error, intended to be suitable for display in a user interface."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -946,13 +987,22 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Support metric aggregation type."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Type of metrics."]
     #[serde(rename = "metricClass", default, skip_serializing_if = "Option::is_none")]
     pub metric_class: Option<String>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
 }
 impl MetricSpecification {
@@ -1145,19 +1195,36 @@ pub struct ResourceSku {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "A list of capabilities of this SKU, such as throughput or ops/sec."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
     #[doc = "The set of locations where the SKU is available. This is the supported and registered Azure Geo Regions (e.g., West US, East US, Southeast Asia, etc.)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The set of locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "The name of this SKU."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The restrictions preventing this SKU from being used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<Restriction>,
 }
 impl ResourceSku {
@@ -1187,7 +1254,11 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "Zones if any."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuLocationInfo {
@@ -1202,7 +1273,11 @@ pub struct ResourceSkusResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of SKUs available for the subscription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceSku>,
 }
 impl azure_core::Continuable for ResourceSkusResult {
@@ -1223,7 +1298,11 @@ pub struct Restriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location, then this would be the different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for the restriction. As of now this can be \"QuotaId\" or \"NotAvailableForSubscription\". \"QuotaId\" is set when the SKU has requiredQuotas parameter as the subscription does not belong to that quota. \"NotAvailableForSubscription\" is related to capacity at the datacenter."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -1292,7 +1371,11 @@ impl StorageTarget {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct StorageTargetProperties {
     #[doc = "List of Cache namespace junctions to target for namespace associations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub junctions: Vec<NamespaceJunction>,
     #[doc = "Type of the Storage Target."]
     #[serde(rename = "targetType")]
@@ -1495,7 +1578,11 @@ pub struct StorageTargetsResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Storage Targets defined for the Cache."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageTarget>,
 }
 impl azure_core::Continuable for StorageTargetsResult {
@@ -1570,7 +1657,11 @@ pub struct UsageModelsResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of usage models available for the subscription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UsageModel>,
 }
 impl azure_core::Continuable for UsageModelsResult {
diff --git a/services/mgmt/storagecache/src/package_2022_01/models.rs b/services/mgmt/storagecache/src/package_2022_01/models.rs
index e2df98f50e..279e60dc36 100644
--- a/services/mgmt/storagecache/src/package_2022_01/models.rs
+++ b/services/mgmt/storagecache/src/package_2022_01/models.rs
@@ -68,7 +68,12 @@ pub mod api_operation {
         #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
         pub struct ServiceSpecification {
             #[doc = "Details about operations related to metrics."]
-            #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                rename = "metricSpecifications",
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub metric_specifications: Vec<MetricSpecification>,
         }
         impl ServiceSpecification {
@@ -85,7 +90,11 @@ pub struct ApiOperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Resource Provider operations supported by the Microsoft.StorageCache resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiOperation>,
 }
 impl azure_core::Continuable for ApiOperationListResult {
@@ -204,7 +213,12 @@ pub mod cache {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub health: Option<CacheHealth>,
         #[doc = "Array of IP addresses that can be used by clients mounting this Cache."]
-        #[serde(rename = "mountAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "mountAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub mount_addresses: Vec<String>,
         #[doc = "ARM provisioning state, see https://github.com/Azure/azure-resource-manager-rpc/blob/master/v1.0/Addendum.md#provisioningstate-property"]
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -228,7 +242,11 @@ pub mod cache {
         #[serde(rename = "directoryServicesSettings", default, skip_serializing_if = "Option::is_none")]
         pub directory_services_settings: Option<CacheDirectorySettings>,
         #[doc = "Availability zones for resources. This field should only contain a single element in the array."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub zones: Vec<String>,
     }
     impl Properties {
@@ -430,7 +448,11 @@ pub struct CacheHealth {
     #[serde(rename = "statusDescription", default, skip_serializing_if = "Option::is_none")]
     pub status_description: Option<String>,
     #[doc = "Outstanding conditions that need to be investigated and resolved."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<Condition>,
 }
 impl CacheHealth {
@@ -532,10 +554,20 @@ pub struct CacheNetworkSettings {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub mtu: Option<i32>,
     #[doc = "Array of additional IP addresses used by this Cache."]
-    #[serde(rename = "utilityAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "utilityAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub utility_addresses: Vec<String>,
     #[doc = "DNS servers for the cache to use.  It will be set from the network configuration if no value is provided."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
     #[doc = "DNS search domain"]
     #[serde(rename = "dnsSearchDomain", default, skip_serializing_if = "Option::is_none")]
@@ -553,7 +585,12 @@ impl CacheNetworkSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CacheSecuritySettings {
     #[doc = "NFS access policies defined for this cache."]
-    #[serde(rename = "accessPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_policies: Vec<NfsAccessPolicy>,
 }
 impl CacheSecuritySettings {
@@ -784,7 +821,11 @@ pub struct CachesListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Caches."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cache>,
 }
 impl azure_core::Continuable for CachesListResult {
@@ -835,7 +876,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
     #[doc = "A message describing the error, intended to be suitable for display in a user interface."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -949,13 +994,22 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Support metric aggregation type."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Type of metrics."]
     #[serde(rename = "metricClass", default, skip_serializing_if = "Option::is_none")]
     pub metric_class: Option<String>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
 }
 impl MetricSpecification {
@@ -1148,19 +1202,36 @@ pub struct ResourceSku {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "A list of capabilities of this SKU, such as throughput or ops/sec."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
     #[doc = "The set of locations where the SKU is available. This is the supported and registered Azure Geo Regions (e.g., West US, East US, Southeast Asia, etc.)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The set of locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "The name of this SKU."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The restrictions preventing this SKU from being used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<Restriction>,
 }
 impl ResourceSku {
@@ -1190,7 +1261,11 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "Zones if any."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuLocationInfo {
@@ -1205,7 +1280,11 @@ pub struct ResourceSkusResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of SKUs available for the subscription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceSku>,
 }
 impl azure_core::Continuable for ResourceSkusResult {
@@ -1265,7 +1344,11 @@ pub struct ResourceUsagesListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of usages and limits for resources controlled by the Microsoft.StorageCache resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceUsage>,
 }
 impl azure_core::Continuable for ResourceUsagesListResult {
@@ -1286,7 +1369,11 @@ pub struct Restriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location, then this would be the different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for the restriction. As of now this can be \"QuotaId\" or \"NotAvailableForSubscription\". \"QuotaId\" is set when the SKU has requiredQuotas parameter as the subscription does not belong to that quota. \"NotAvailableForSubscription\" is related to capacity at the datacenter."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -1355,7 +1442,11 @@ impl StorageTarget {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct StorageTargetProperties {
     #[doc = "List of Cache namespace junctions to target for namespace associations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub junctions: Vec<NamespaceJunction>,
     #[doc = "Type of the Storage Target."]
     #[serde(rename = "targetType")]
@@ -1558,7 +1649,11 @@ pub struct StorageTargetsResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Storage Targets defined for the Cache."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageTarget>,
 }
 impl azure_core::Continuable for StorageTargetsResult {
@@ -1633,7 +1728,11 @@ pub struct UsageModelsResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of usage models available for the subscription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UsageModel>,
 }
 impl azure_core::Continuable for UsageModelsResult {
diff --git a/services/mgmt/storagecache/src/package_2022_05/models.rs b/services/mgmt/storagecache/src/package_2022_05/models.rs
index b77ef382ff..81af82382c 100644
--- a/services/mgmt/storagecache/src/package_2022_05/models.rs
+++ b/services/mgmt/storagecache/src/package_2022_05/models.rs
@@ -68,10 +68,20 @@ pub mod api_operation {
         #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
         pub struct ServiceSpecification {
             #[doc = "Details about operations related to metrics."]
-            #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                rename = "metricSpecifications",
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub metric_specifications: Vec<MetricSpecification>,
             #[doc = "Details about operations related to logs."]
-            #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+            #[serde(
+                rename = "logSpecifications",
+                default,
+                deserialize_with = "azure_core::util::deserialize_null_as_default",
+                skip_serializing_if = "Vec::is_empty"
+            )]
             pub log_specifications: Vec<LogSpecification>,
         }
         impl ServiceSpecification {
@@ -88,7 +98,11 @@ pub struct ApiOperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Resource Provider operations supported by the Microsoft.StorageCache resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApiOperation>,
 }
 impl azure_core::Continuable for ApiOperationListResult {
@@ -207,7 +221,12 @@ pub mod cache {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub health: Option<CacheHealth>,
         #[doc = "Array of IP addresses that can be used by clients mounting this Cache."]
-        #[serde(rename = "mountAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "mountAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub mount_addresses: Vec<String>,
         #[doc = "ARM provisioning state, see https://github.com/Azure/azure-resource-manager-rpc/blob/master/v1.0/Addendum.md#provisioningstate-property"]
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -234,7 +253,11 @@ pub mod cache {
         #[serde(rename = "directoryServicesSettings", default, skip_serializing_if = "Option::is_none")]
         pub directory_services_settings: Option<CacheDirectorySettings>,
         #[doc = "Availability zones for resources. This field should only contain a single element in the array."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub zones: Vec<String>,
         #[doc = "The list of priming jobs defined for the cache."]
         #[serde(rename = "primingJobs", default, skip_serializing_if = "Option::is_none")]
@@ -442,7 +465,11 @@ pub struct CacheHealth {
     #[serde(rename = "statusDescription", default, skip_serializing_if = "Option::is_none")]
     pub status_description: Option<String>,
     #[doc = "Outstanding conditions that need to be investigated and resolved."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<Condition>,
 }
 impl CacheHealth {
@@ -550,10 +577,20 @@ pub struct CacheNetworkSettings {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub mtu: Option<i32>,
     #[doc = "Array of additional IP addresses used by this Cache."]
-    #[serde(rename = "utilityAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "utilityAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub utility_addresses: Vec<String>,
     #[doc = "DNS servers for the cache to use.  It will be set from the network configuration if no value is provided."]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
     #[doc = "DNS search domain"]
     #[serde(rename = "dnsSearchDomain", default, skip_serializing_if = "Option::is_none")]
@@ -571,7 +608,12 @@ impl CacheNetworkSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CacheSecuritySettings {
     #[doc = "NFS access policies defined for this cache."]
-    #[serde(rename = "accessPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_policies: Vec<NfsAccessPolicy>,
 }
 impl CacheSecuritySettings {
@@ -817,7 +859,11 @@ pub struct CachesListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Caches."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cache>,
 }
 impl azure_core::Continuable for CachesListResult {
@@ -868,7 +914,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
     #[doc = "A message describing the error, intended to be suitable for display in a user interface."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -997,13 +1047,22 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Support metric aggregation type."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Type of metrics."]
     #[serde(rename = "metricClass", default, skip_serializing_if = "Option::is_none")]
     pub metric_class: Option<String>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
 }
 impl MetricSpecification {
@@ -1291,19 +1350,36 @@ pub struct ResourceSku {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "A list of capabilities of this SKU, such as throughput or ops/sec."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapabilities>,
     #[doc = "The set of locations where the SKU is available. This is the supported and registered Azure Geo Regions (e.g., West US, East US, Southeast Asia, etc.)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The set of locations where the SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<ResourceSkuLocationInfo>,
     #[doc = "The name of this SKU."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The restrictions preventing this SKU from being used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<Restriction>,
 }
 impl ResourceSku {
@@ -1333,7 +1409,11 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "Zones if any."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuLocationInfo {
@@ -1348,7 +1428,11 @@ pub struct ResourceSkusResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of SKUs available for the subscription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceSku>,
 }
 impl azure_core::Continuable for ResourceSkusResult {
@@ -1408,7 +1492,11 @@ pub struct ResourceUsagesListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of usages and limits for resources controlled by the Microsoft.StorageCache resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceUsage>,
 }
 impl azure_core::Continuable for ResourceUsagesListResult {
@@ -1429,7 +1517,11 @@ pub struct Restriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The value of restrictions. If the restriction type is set to location, then this would be the different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The reason for the restriction. As of now this can be \"QuotaId\" or \"NotAvailableForSubscription\". \"QuotaId\" is set when the SKU has requiredQuotas parameter as the subscription does not belong to that quota. \"NotAvailableForSubscription\" is related to capacity at the datacenter."]
     #[serde(rename = "reasonCode", default, skip_serializing_if = "Option::is_none")]
@@ -1500,7 +1592,11 @@ impl StorageTarget {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct StorageTargetProperties {
     #[doc = "List of Cache namespace junctions to target for namespace associations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub junctions: Vec<NamespaceJunction>,
     #[doc = "Type of the Storage Target."]
     #[serde(rename = "targetType")]
@@ -1722,7 +1818,11 @@ pub struct StorageTargetsResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of Storage Targets defined for the Cache."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageTarget>,
 }
 impl azure_core::Continuable for StorageTargetsResult {
@@ -1797,7 +1897,11 @@ pub struct UsageModelsResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of usage models available for the subscription."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UsageModel>,
 }
 impl azure_core::Continuable for UsageModelsResult {
diff --git a/services/mgmt/storageimportexport/src/package_2016_11/models.rs b/services/mgmt/storageimportexport/src/package_2016_11/models.rs
index e8e7df8c9a..ff37c910e5 100644
--- a/services/mgmt/storageimportexport/src/package_2016_11/models.rs
+++ b/services/mgmt/storageimportexport/src/package_2016_11/models.rs
@@ -240,7 +240,11 @@ pub mod error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "Describes the error details if present."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<serde_json::Value>,
         #[doc = "Inner error object if present."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -273,10 +277,20 @@ pub mod export {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct BlobList {
         #[doc = "A collection of blob-path strings."]
-        #[serde(rename = "blobPath", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "blobPath",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub blob_path: Vec<String>,
         #[doc = "A collection of blob-prefix strings."]
-        #[serde(rename = "blobPathPrefix", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "blobPathPrefix",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub blob_path_prefix: Vec<String>,
     }
     impl BlobList {
@@ -289,7 +303,11 @@ pub mod export {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GetBitLockerKeysResponse {
     #[doc = "drive status"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DriveBitLockerKey>,
 }
 impl azure_core::Continuable for GetBitLockerKeysResponse {
@@ -414,7 +432,12 @@ pub struct JobDetails {
     #[serde(rename = "incompleteBlobListUri", default, skip_serializing_if = "Option::is_none")]
     pub incomplete_blob_list_uri: Option<String>,
     #[doc = "List of up to ten drives that comprise the job. The drive list is a required element for an import job; it is not specified for export jobs."]
-    #[serde(rename = "driveList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "driveList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub drive_list: Vec<DriveStatus>,
     #[doc = "A property containing information about the blobs to be exported for an export job. This property is required for export jobs, but must not be specified for import jobs."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -471,7 +494,11 @@ pub struct ListJobsResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Job list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResponse>,
 }
 impl azure_core::Continuable for ListJobsResponse {
@@ -489,7 +516,11 @@ impl ListJobsResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListOperationsResponse {
     #[doc = "operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for ListOperationsResponse {
@@ -557,10 +588,20 @@ pub mod location {
         #[serde(rename = "additionalShippingInformation", default, skip_serializing_if = "Option::is_none")]
         pub additional_shipping_information: Option<String>,
         #[doc = "A list of carriers that are supported at this location. "]
-        #[serde(rename = "supportedCarriers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "supportedCarriers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub supported_carriers: Vec<String>,
         #[doc = "A list of location IDs that should be used to ship shipping drives to for jobs created against the current location. If the current location is active, it will be part of the list. If it is temporarily closed due to maintenance, this list may contain other locations. "]
-        #[serde(rename = "alternateLocations", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "alternateLocations",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub alternate_locations: Vec<String>,
     }
     impl Properties {
@@ -573,7 +614,11 @@ pub mod location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocationsResponse {
     #[doc = "locations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Location>,
 }
 impl azure_core::Continuable for LocationsResponse {
@@ -815,7 +860,12 @@ pub mod update_job_parameters {
         #[serde(rename = "backupDriveManifest", default, skip_serializing_if = "Option::is_none")]
         pub backup_drive_manifest: Option<bool>,
         #[doc = "List of drives that comprise the job."]
-        #[serde(rename = "driveList", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "driveList",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub drive_list: Vec<DriveStatus>,
     }
     impl Properties {
diff --git a/services/mgmt/storageimportexport/src/package_2020_08/models.rs b/services/mgmt/storageimportexport/src/package_2020_08/models.rs
index 0b0bca4ca5..61700d10b1 100644
--- a/services/mgmt/storageimportexport/src/package_2020_08/models.rs
+++ b/services/mgmt/storageimportexport/src/package_2020_08/models.rs
@@ -240,7 +240,11 @@ pub mod error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "Describes the error details if present."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<serde_json::Value>,
         #[doc = "Inner error object if present."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -273,10 +277,20 @@ pub mod export {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct BlobList {
         #[doc = "A collection of blob-path strings."]
-        #[serde(rename = "blobPath", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "blobPath",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub blob_path: Vec<String>,
         #[doc = "A collection of blob-prefix strings."]
-        #[serde(rename = "blobPathPrefix", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "blobPathPrefix",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub blob_path_prefix: Vec<String>,
     }
     impl BlobList {
@@ -289,7 +303,11 @@ pub mod export {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GetBitLockerKeysResponse {
     #[doc = "drive status"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DriveBitLockerKey>,
 }
 impl azure_core::Continuable for GetBitLockerKeysResponse {
@@ -414,7 +432,12 @@ pub struct JobDetails {
     #[serde(rename = "incompleteBlobListUri", default, skip_serializing_if = "Option::is_none")]
     pub incomplete_blob_list_uri: Option<String>,
     #[doc = "List of up to ten drives that comprise the job. The drive list is a required element for an import job; it is not specified for export jobs."]
-    #[serde(rename = "driveList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "driveList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub drive_list: Vec<DriveStatus>,
     #[doc = "A property containing information about the blobs to be exported for an export job. This property is required for export jobs, but must not be specified for import jobs."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -471,7 +494,11 @@ pub struct ListJobsResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Job list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResponse>,
 }
 impl azure_core::Continuable for ListJobsResponse {
@@ -489,7 +516,11 @@ impl ListJobsResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListOperationsResponse {
     #[doc = "operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for ListOperationsResponse {
@@ -557,10 +588,20 @@ pub mod location {
         #[serde(rename = "additionalShippingInformation", default, skip_serializing_if = "Option::is_none")]
         pub additional_shipping_information: Option<String>,
         #[doc = "A list of carriers that are supported at this location. "]
-        #[serde(rename = "supportedCarriers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "supportedCarriers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub supported_carriers: Vec<String>,
         #[doc = "A list of location IDs that should be used to ship shipping drives to for jobs created against the current location. If the current location is active, it will be part of the list. If it is temporarily closed due to maintenance, this list may contain other locations. "]
-        #[serde(rename = "alternateLocations", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "alternateLocations",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub alternate_locations: Vec<String>,
     }
     impl Properties {
@@ -573,7 +614,11 @@ pub mod location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocationsResponse {
     #[doc = "locations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Location>,
 }
 impl azure_core::Continuable for LocationsResponse {
@@ -815,7 +860,12 @@ pub mod update_job_parameters {
         #[serde(rename = "backupDriveManifest", default, skip_serializing_if = "Option::is_none")]
         pub backup_drive_manifest: Option<bool>,
         #[doc = "List of drives that comprise the job."]
-        #[serde(rename = "driveList", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "driveList",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub drive_list: Vec<DriveStatus>,
     }
     impl Properties {
diff --git a/services/mgmt/storageimportexport/src/package_preview_2021_01/models.rs b/services/mgmt/storageimportexport/src/package_preview_2021_01/models.rs
index 3b116d5b8e..63868e87cb 100644
--- a/services/mgmt/storageimportexport/src/package_preview_2021_01/models.rs
+++ b/services/mgmt/storageimportexport/src/package_preview_2021_01/models.rs
@@ -240,7 +240,11 @@ pub mod error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "Describes the error details if present."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<serde_json::Value>,
         #[doc = "Inner error object if present."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -273,10 +277,20 @@ pub mod export {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct BlobList {
         #[doc = "A collection of blob-path strings."]
-        #[serde(rename = "blobPath", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "blobPath",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub blob_path: Vec<String>,
         #[doc = "A collection of blob-prefix strings."]
-        #[serde(rename = "blobPathPrefix", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "blobPathPrefix",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub blob_path_prefix: Vec<String>,
     }
     impl BlobList {
@@ -289,7 +303,11 @@ pub mod export {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GetBitLockerKeysResponse {
     #[doc = "drive status"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DriveBitLockerKey>,
 }
 impl azure_core::Continuable for GetBitLockerKeysResponse {
@@ -414,7 +432,12 @@ pub struct JobDetails {
     #[serde(rename = "incompleteBlobListUri", default, skip_serializing_if = "Option::is_none")]
     pub incomplete_blob_list_uri: Option<String>,
     #[doc = "List of up to ten drives that comprise the job. The drive list is a required element for an import job; it is not specified for export jobs."]
-    #[serde(rename = "driveList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "driveList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub drive_list: Vec<DriveStatus>,
     #[doc = "A property containing information about the blobs to be exported for an export job. This property is required for export jobs, but must not be specified for import jobs."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -471,7 +494,11 @@ pub struct ListJobsResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Job list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobResponse>,
 }
 impl azure_core::Continuable for ListJobsResponse {
@@ -489,7 +516,11 @@ impl ListJobsResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListOperationsResponse {
     #[doc = "operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for ListOperationsResponse {
@@ -557,10 +588,20 @@ pub mod location {
         #[serde(rename = "additionalShippingInformation", default, skip_serializing_if = "Option::is_none")]
         pub additional_shipping_information: Option<String>,
         #[doc = "A list of carriers that are supported at this location. "]
-        #[serde(rename = "supportedCarriers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "supportedCarriers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub supported_carriers: Vec<String>,
         #[doc = "A list of location IDs that should be used to ship shipping drives to for jobs created against the current location. If the current location is active, it will be part of the list. If it is temporarily closed due to maintenance, this list may contain other locations. "]
-        #[serde(rename = "alternateLocations", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "alternateLocations",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub alternate_locations: Vec<String>,
     }
     impl Properties {
@@ -573,7 +614,11 @@ pub mod location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocationsResponse {
     #[doc = "locations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Location>,
 }
 impl azure_core::Continuable for LocationsResponse {
@@ -815,7 +860,12 @@ pub mod update_job_parameters {
         #[serde(rename = "backupDriveManifest", default, skip_serializing_if = "Option::is_none")]
         pub backup_drive_manifest: Option<bool>,
         #[doc = "List of drives that comprise the job."]
-        #[serde(rename = "driveList", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "driveList",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub drive_list: Vec<DriveStatus>,
     }
     impl Properties {
diff --git a/services/mgmt/storagemover/src/package_2022_07_01_preview/models.rs b/services/mgmt/storagemover/src/package_2022_07_01_preview/models.rs
index fced4c15c6..497d55cdb2 100644
--- a/services/mgmt/storagemover/src/package_2022_07_01_preview/models.rs
+++ b/services/mgmt/storagemover/src/package_2022_07_01_preview/models.rs
@@ -25,7 +25,11 @@ impl Agent {
 #[doc = "List of Agents."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AgentList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Agent>,
     #[doc = "Request URL that can be used to query next page of containers. Returned when total number of requested containers exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -391,7 +395,11 @@ impl EndpointBaseUpdateProperties {
 #[doc = "List of Endpoints."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EndpointList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Endpoint>,
     #[doc = "Request URL that can be used to query next page of containers. Returned when total number of requested containers exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -436,10 +444,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -488,7 +505,11 @@ impl JobDefinition {
 #[doc = "List of Job Definitions."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobDefinitionList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobDefinition>,
     #[doc = "Request URL that can be used to query next page of containers. Returned when total number of requested containers exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -803,7 +824,11 @@ impl JobRunError {
 #[doc = "List of Job Runs."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobRunList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobRun>,
     #[doc = "Request URL that can be used to query next page of containers. Returned when total number of requested containers exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1257,7 +1282,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1294,7 +1323,11 @@ impl Project {
 #[doc = "List of Project resources."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProjectList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Project>,
     #[doc = "Request URL that can be used to query next page of containers. Returned when total number of requested containers exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1441,7 +1474,11 @@ impl StorageMover {
 #[doc = "List of Storage Movers."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageMoverList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageMover>,
     #[doc = "Request URL that can be used to query next page of containers. Returned when total number of requested containers exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/storagepool/src/package_2020_03_15_preview/models.rs b/services/mgmt/storagepool/src/package_2020_03_15_preview/models.rs
index 51ba87a821..3dc851a9f0 100644
--- a/services/mgmt/storagepool/src/package_2020_03_15_preview/models.rs
+++ b/services/mgmt/storagepool/src/package_2020_03_15_preview/models.rs
@@ -114,13 +114,22 @@ pub struct DiskPoolCreateProperties {
     #[serde(rename = "availabilityZones")]
     pub availability_zones: Vec<AvailabilityZone>,
     #[doc = "List of Azure Managed Disks to attach to a Disk pool. Can attach 8 disks at most."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<Disk>,
     #[doc = "Azure Resource ID of a Subnet for the Disk pool."]
     #[serde(rename = "subnetId")]
     pub subnet_id: String,
     #[doc = "List of additional capabilities for a Disk pool."]
-    #[serde(rename = "additionalCapabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalCapabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_capabilities: Vec<AdditionalCapability>,
     #[doc = "SKU of the VM host part of the Disk pool deployment"]
     pub tier: DiskPoolTier,
@@ -168,13 +177,22 @@ pub struct DiskPoolProperties {
     #[doc = "Operational status of the resource."]
     pub status: OperationalStatus,
     #[doc = "List of Azure Managed Disks to attach to a Disk pool. Can attach 8 disks at most."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<Disk>,
     #[doc = "Azure Resource ID of a Subnet for the Disk pool."]
     #[serde(rename = "subnetId")]
     pub subnet_id: String,
     #[doc = "List of additional capabilities for Disk pool."]
-    #[serde(rename = "additionalCapabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalCapabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_capabilities: Vec<AdditionalCapability>,
     #[doc = "SKU of the VM host part of the Disk pool deployment"]
     pub tier: DiskPoolTier,
@@ -255,7 +273,11 @@ impl DiskPoolUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskPoolUpdateProperties {
     #[doc = "List of Azure Managed Disks to attach to a Disk pool. Can attach 8 disks at most."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<Disk>,
 }
 impl DiskPoolUpdateProperties {
@@ -309,10 +331,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -734,10 +765,18 @@ impl TargetPortalGroupCreate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TargetPortalGroupUpdate {
     #[doc = "List of LUNs to be exposed through the iSCSI target portal group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luns: Vec<IscsiLun>,
     #[doc = "Access Control List (ACL) for an iSCSI target portal group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub acls: Vec<Acl>,
 }
 impl TargetPortalGroupUpdate {
diff --git a/services/mgmt/storagepool/src/package_2021_04_01_preview/models.rs b/services/mgmt/storagepool/src/package_2021_04_01_preview/models.rs
index 3d842b2675..f557edf70a 100644
--- a/services/mgmt/storagepool/src/package_2021_04_01_preview/models.rs
+++ b/services/mgmt/storagepool/src/package_2021_04_01_preview/models.rs
@@ -134,16 +134,30 @@ impl DiskPoolCreate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct DiskPoolCreateProperties {
     #[doc = "Logical zone for Disk Pool resource; example: [\"1\"]."]
-    #[serde(rename = "availabilityZones", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilityZones",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_zones: Vec<AvailabilityZone>,
     #[doc = "List of Azure Managed Disks to attach to a Disk Pool."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<Disk>,
     #[doc = "Azure Resource ID of a Subnet for the Disk Pool."]
     #[serde(rename = "subnetId")]
     pub subnet_id: String,
     #[doc = "List of additional capabilities for a Disk Pool."]
-    #[serde(rename = "additionalCapabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalCapabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_capabilities: Vec<AdditionalCapability>,
 }
 impl DiskPoolCreateProperties {
@@ -188,13 +202,22 @@ pub struct DiskPoolProperties {
     #[doc = "Operational status of the resource."]
     pub status: OperationalStatus,
     #[doc = "List of Azure Managed Disks to attach to a Disk Pool."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<Disk>,
     #[doc = "Azure Resource ID of a Subnet for the Disk Pool."]
     #[serde(rename = "subnetId")]
     pub subnet_id: String,
     #[doc = "List of additional capabilities for Disk Pool."]
-    #[serde(rename = "additionalCapabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalCapabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_capabilities: Vec<AdditionalCapability>,
 }
 impl DiskPoolProperties {
@@ -271,7 +294,11 @@ impl DiskPoolUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskPoolUpdateProperties {
     #[doc = "List of Azure Managed Disks to attach to a Disk Pool."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<Disk>,
 }
 impl DiskPoolUpdateProperties {
@@ -283,10 +310,20 @@ impl DiskPoolUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskPoolZoneInfo {
     #[doc = "Logical zone for Disk Pool resource; example: [\"1\"]."]
-    #[serde(rename = "availabilityZones", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilityZones",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_zones: Vec<AvailabilityZone>,
     #[doc = "List of additional capabilities for Disk Pool."]
-    #[serde(rename = "additionalCapabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalCapabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_capabilities: Vec<AdditionalCapability>,
     #[doc = "Sku for ARM resource"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -301,7 +338,11 @@ impl DiskPoolZoneInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskPoolZoneListResult {
     #[doc = "The list of Disk Pool Skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiskPoolZoneInfo>,
     #[doc = "URI to fetch the next section of the paginated response."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -325,7 +366,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The IP Addresses and Ports used when connecting to DomainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -400,10 +446,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -478,10 +533,19 @@ pub struct IscsiTargetCreateProperties {
     #[serde(rename = "targetIqn", default, skip_serializing_if = "Option::is_none")]
     pub target_iqn: Option<String>,
     #[doc = "Access Control List (ACL) for an iSCSI Target; defines LUN masking policy"]
-    #[serde(rename = "staticAcls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "staticAcls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub static_acls: Vec<Acl>,
     #[doc = "List of LUNs to be exposed through iSCSI Target."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luns: Vec<IscsiLun>,
 }
 impl IscsiTargetCreateProperties {
@@ -521,10 +585,19 @@ pub struct IscsiTargetProperties {
     #[serde(rename = "aclMode")]
     pub acl_mode: AclMode,
     #[doc = "Access Control List (ACL) for an iSCSI Target; defines LUN masking policy"]
-    #[serde(rename = "staticAcls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "staticAcls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub static_acls: Vec<Acl>,
     #[doc = "List of LUNs to be exposed through iSCSI Target."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luns: Vec<IscsiLun>,
     #[doc = "iSCSI Target IQN (iSCSI Qualified Name); example: \"iqn.2005-03.org.iscsi:server\"."]
     #[serde(rename = "targetIqn")]
@@ -535,7 +608,11 @@ pub struct IscsiTargetProperties {
     #[doc = "Operational status of the resource."]
     pub status: OperationalStatus,
     #[doc = "List of private IPv4 addresses to connect to the iSCSI Target."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<String>,
     #[doc = "The port used by iSCSI Target portal group."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -575,10 +652,19 @@ impl IscsiTargetUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IscsiTargetUpdateProperties {
     #[doc = "Access Control List (ACL) for an iSCSI Target; defines LUN masking policy"]
-    #[serde(rename = "staticAcls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "staticAcls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub static_acls: Vec<Acl>,
     #[doc = "List of LUNs to be exposed through iSCSI Target."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luns: Vec<IscsiLun>,
 }
 impl IscsiTargetUpdateProperties {
@@ -643,7 +729,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that the App Service Environment reaches the service at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
diff --git a/services/mgmt/storagepool/src/package_2021_08_01/models.rs b/services/mgmt/storagepool/src/package_2021_08_01/models.rs
index 66fced256c..ddb280a644 100644
--- a/services/mgmt/storagepool/src/package_2021_08_01/models.rs
+++ b/services/mgmt/storagepool/src/package_2021_08_01/models.rs
@@ -150,16 +150,30 @@ impl DiskPoolCreate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct DiskPoolCreateProperties {
     #[doc = "Logical zone for Disk Pool resource; example: [\"1\"]."]
-    #[serde(rename = "availabilityZones", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilityZones",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_zones: Vec<AvailabilityZone>,
     #[doc = "List of Azure Managed Disks to attach to a Disk Pool."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<Disk>,
     #[doc = "Azure Resource ID of a Subnet for the Disk Pool."]
     #[serde(rename = "subnetId")]
     pub subnet_id: String,
     #[doc = "List of additional capabilities for a Disk Pool."]
-    #[serde(rename = "additionalCapabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalCapabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_capabilities: Vec<AdditionalCapability>,
 }
 impl DiskPoolCreateProperties {
@@ -204,13 +218,22 @@ pub struct DiskPoolProperties {
     #[doc = "Operational status of the resource."]
     pub status: OperationalStatus,
     #[doc = "List of Azure Managed Disks to attach to a Disk Pool."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<Disk>,
     #[doc = "Azure Resource ID of a Subnet for the Disk Pool."]
     #[serde(rename = "subnetId")]
     pub subnet_id: String,
     #[doc = "List of additional capabilities for Disk Pool."]
-    #[serde(rename = "additionalCapabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalCapabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_capabilities: Vec<AdditionalCapability>,
 }
 impl DiskPoolProperties {
@@ -302,7 +325,11 @@ impl DiskPoolUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskPoolUpdateProperties {
     #[doc = "List of Azure Managed Disks to attach to a Disk Pool."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<Disk>,
 }
 impl DiskPoolUpdateProperties {
@@ -314,10 +341,20 @@ impl DiskPoolUpdateProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskPoolZoneInfo {
     #[doc = "Logical zone for Disk Pool resource; example: [\"1\"]."]
-    #[serde(rename = "availabilityZones", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilityZones",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_zones: Vec<AvailabilityZone>,
     #[doc = "List of additional capabilities for Disk Pool."]
-    #[serde(rename = "additionalCapabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalCapabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_capabilities: Vec<AdditionalCapability>,
     #[doc = "Sku for ARM resource"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -332,7 +369,11 @@ impl DiskPoolZoneInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskPoolZoneListResult {
     #[doc = "The list of Disk Pool Skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiskPoolZoneInfo>,
     #[doc = "URI to fetch the next section of the paginated response."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -356,7 +397,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The IP Addresses and Ports used when connecting to DomainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -431,10 +477,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -525,10 +580,19 @@ pub struct IscsiTargetCreateProperties {
     #[serde(rename = "targetIqn", default, skip_serializing_if = "Option::is_none")]
     pub target_iqn: Option<String>,
     #[doc = "Access Control List (ACL) for an iSCSI Target; defines LUN masking policy"]
-    #[serde(rename = "staticAcls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "staticAcls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub static_acls: Vec<Acl>,
     #[doc = "List of LUNs to be exposed through iSCSI Target."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luns: Vec<IscsiLun>,
 }
 impl IscsiTargetCreateProperties {
@@ -568,10 +632,19 @@ pub struct IscsiTargetProperties {
     #[serde(rename = "aclMode")]
     pub acl_mode: AclMode,
     #[doc = "Access Control List (ACL) for an iSCSI Target; defines LUN masking policy"]
-    #[serde(rename = "staticAcls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "staticAcls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub static_acls: Vec<Acl>,
     #[doc = "List of LUNs to be exposed through iSCSI Target."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luns: Vec<IscsiLun>,
     #[doc = "iSCSI Target IQN (iSCSI Qualified Name); example: \"iqn.2005-03.org.iscsi:server\"."]
     #[serde(rename = "targetIqn")]
@@ -582,13 +655,21 @@ pub struct IscsiTargetProperties {
     #[doc = "Operational status of the resource."]
     pub status: OperationalStatus,
     #[doc = "List of private IPv4 addresses to connect to the iSCSI Target."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<String>,
     #[doc = "The port used by iSCSI Target portal group."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub port: Option<i32>,
     #[doc = "List of identifiers for active sessions on the iSCSI target"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sessions: Vec<String>,
 }
 impl IscsiTargetProperties {
@@ -634,10 +715,19 @@ impl IscsiTargetUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IscsiTargetUpdateProperties {
     #[doc = "Access Control List (ACL) for an iSCSI Target; defines LUN masking policy"]
-    #[serde(rename = "staticAcls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "staticAcls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub static_acls: Vec<Acl>,
     #[doc = "List of LUNs to be exposed through iSCSI Target."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub luns: Vec<IscsiLun>,
 }
 impl IscsiTargetUpdateProperties {
@@ -704,7 +794,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that the App Service Environment reaches the service at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -835,7 +929,11 @@ pub struct ResourceSkuInfo {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "List of additional capabilities for StoragePool resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapability>,
     #[doc = "Zone and capability info for resource sku"]
     #[serde(rename = "locationInfo", default, skip_serializing_if = "Option::is_none")]
@@ -847,7 +945,11 @@ pub struct ResourceSkuInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tier: Option<String>,
     #[doc = "The restrictions because of which SKU cannot be used. This is empty if there are no restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<ResourceSkuRestrictions>,
 }
 impl ResourceSkuInfo {
@@ -859,7 +961,11 @@ impl ResourceSkuInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuListResult {
     #[doc = "The list of StoragePool resource skus."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourceSkuInfo>,
     #[doc = "URI to fetch the next section of the paginated response."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -883,10 +989,19 @@ pub struct ResourceSkuLocationInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "List of availability zones where the SKU is supported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<AvailabilityZone>,
     #[doc = "Details of capabilities available to a SKU in specific zones."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<ResourceSkuZoneDetails>,
 }
 impl ResourceSkuLocationInfo {
@@ -898,10 +1013,18 @@ impl ResourceSkuLocationInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuRestrictionInfo {
     #[doc = "Locations where the SKU is restricted"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "List of availability zones where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResourceSkuRestrictionInfo {
@@ -916,7 +1039,11 @@ pub struct ResourceSkuRestrictions {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<resource_sku_restrictions::Type>,
     #[doc = "The value of restrictions. If the restriction type is set to location. This would be different locations where the SKU is restricted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "Describes an available Compute SKU Restriction Information."]
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
@@ -949,10 +1076,18 @@ pub mod resource_sku_restrictions {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceSkuZoneDetails {
     #[doc = "The set of zones that the SKU is available in with the specified capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<AvailabilityZone>,
     #[doc = "A list of capabilities that are available for the SKU in the specified list of zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<ResourceSkuCapability>,
 }
 impl ResourceSkuZoneDetails {
diff --git a/services/mgmt/storagesync/src/package_2019_03_01/models.rs b/services/mgmt/storagesync/src/package_2019_03_01/models.rs
index 190bed2be9..9e1beaf2e8 100644
--- a/services/mgmt/storagesync/src/package_2019_03_01/models.rs
+++ b/services/mgmt/storagesync/src/package_2019_03_01/models.rs
@@ -83,7 +83,11 @@ impl CloudEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudEndpointArray {
     #[doc = "Collection of CloudEndpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudEndpoint>,
 }
 impl azure_core::Continuable for CloudEndpointArray {
@@ -288,7 +292,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
@@ -376,7 +384,12 @@ pub struct PostRestoreRequest {
     #[serde(rename = "failedFileList", default, skip_serializing_if = "Option::is_none")]
     pub failed_file_list: Option<String>,
     #[doc = "Post Restore restore file spec array."]
-    #[serde(rename = "restoreFileSpec", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreFileSpec",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_file_spec: Vec<RestoreFileSpec>,
 }
 impl PostRestoreRequest {
@@ -409,7 +422,12 @@ pub struct PreRestoreRequest {
     #[serde(rename = "backupMetadataPropertyBag", default, skip_serializing_if = "Option::is_none")]
     pub backup_metadata_property_bag: Option<String>,
     #[doc = "Pre Restore restore file spec array."]
-    #[serde(rename = "restoreFileSpec", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreFileSpec",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_file_spec: Vec<RestoreFileSpec>,
     #[doc = "Pre Restore pause wait for sync drain time period in seconds."]
     #[serde(
@@ -482,7 +500,11 @@ impl RegisteredServer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegisteredServerArray {
     #[doc = "Collection of Registered Server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegisteredServer>,
 }
 impl azure_core::Continuable for RegisteredServerArray {
@@ -636,7 +658,11 @@ pub struct ResourcesMoveInfo {
     #[serde(rename = "targetResourceGroup", default, skip_serializing_if = "Option::is_none")]
     pub target_resource_group: Option<String>,
     #[doc = "Collection of Resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<ResourceId>,
 }
 impl ResourcesMoveInfo {
@@ -677,7 +703,11 @@ impl ServerEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerEndpointArray {
     #[doc = "Collection of ServerEndpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerEndpoint>,
 }
 impl azure_core::Continuable for ServerEndpointArray {
@@ -956,7 +986,11 @@ impl StorageSyncService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageSyncServiceArray {
     #[doc = "Collection of StorageSyncServices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageSyncService>,
 }
 impl azure_core::Continuable for StorageSyncServiceArray {
@@ -1152,7 +1186,11 @@ impl SyncGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupArray {
     #[doc = "Collection of SyncGroup."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncGroup>,
 }
 impl azure_core::Continuable for SyncGroupArray {
@@ -1225,7 +1263,12 @@ pub struct SyncSessionStatus {
     #[serde(rename = "transientFilesNotSyncingCount", default, skip_serializing_if = "Option::is_none")]
     pub transient_files_not_syncing_count: Option<i64>,
     #[doc = "Array of per-item errors coming from the last sync session. Reserved for future use."]
-    #[serde(rename = "filesNotSyncingErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filesNotSyncingErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files_not_syncing_errors: Vec<FilesNotSyncingError>,
 }
 impl SyncSessionStatus {
@@ -1271,7 +1314,11 @@ pub struct TriggerChangeDetectionParameters {
     #[serde(rename = "changeDetectionMode", default, skip_serializing_if = "Option::is_none")]
     pub change_detection_mode: Option<trigger_change_detection_parameters::ChangeDetectionMode>,
     #[doc = "Array of relative paths on the Azure File share to be included in the change detection. Can be files and directories."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<String>,
 }
 impl TriggerChangeDetectionParameters {
@@ -1349,7 +1396,11 @@ impl Workflow {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowArray {
     #[doc = "Collection of workflow items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workflow>,
 }
 impl azure_core::Continuable for WorkflowArray {
diff --git a/services/mgmt/storagesync/src/package_2019_06_01/models.rs b/services/mgmt/storagesync/src/package_2019_06_01/models.rs
index 6c6beb0392..28e3e2d66b 100644
--- a/services/mgmt/storagesync/src/package_2019_06_01/models.rs
+++ b/services/mgmt/storagesync/src/package_2019_06_01/models.rs
@@ -83,7 +83,11 @@ impl CloudEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudEndpointArray {
     #[doc = "Collection of CloudEndpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudEndpoint>,
 }
 impl azure_core::Continuable for CloudEndpointArray {
@@ -253,7 +257,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
@@ -341,7 +349,12 @@ pub struct PostRestoreRequest {
     #[serde(rename = "failedFileList", default, skip_serializing_if = "Option::is_none")]
     pub failed_file_list: Option<String>,
     #[doc = "Post Restore restore file spec array."]
-    #[serde(rename = "restoreFileSpec", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreFileSpec",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_file_spec: Vec<RestoreFileSpec>,
 }
 impl PostRestoreRequest {
@@ -374,7 +387,12 @@ pub struct PreRestoreRequest {
     #[serde(rename = "backupMetadataPropertyBag", default, skip_serializing_if = "Option::is_none")]
     pub backup_metadata_property_bag: Option<String>,
     #[doc = "Pre Restore restore file spec array."]
-    #[serde(rename = "restoreFileSpec", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreFileSpec",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_file_spec: Vec<RestoreFileSpec>,
     #[doc = "Pre Restore pause wait for sync drain time period in seconds."]
     #[serde(
@@ -447,7 +465,11 @@ impl RegisteredServer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegisteredServerArray {
     #[doc = "Collection of Registered Server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegisteredServer>,
 }
 impl azure_core::Continuable for RegisteredServerArray {
@@ -601,7 +623,11 @@ pub struct ResourcesMoveInfo {
     #[serde(rename = "targetResourceGroup", default, skip_serializing_if = "Option::is_none")]
     pub target_resource_group: Option<String>,
     #[doc = "Collection of Resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<ResourceId>,
 }
 impl ResourcesMoveInfo {
@@ -642,7 +668,11 @@ impl ServerEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerEndpointArray {
     #[doc = "Collection of ServerEndpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerEndpoint>,
 }
 impl azure_core::Continuable for ServerEndpointArray {
@@ -846,7 +876,12 @@ pub struct ServerEndpointRecallStatus {
     #[serde(rename = "totalRecallErrorsCount", default, skip_serializing_if = "Option::is_none")]
     pub total_recall_errors_count: Option<i64>,
     #[doc = "Array of recall errors"]
-    #[serde(rename = "recallErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recallErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recall_errors: Vec<ServerEndpointRecallError>,
 }
 impl ServerEndpointRecallStatus {
@@ -919,7 +954,12 @@ pub struct ServerEndpointSyncSessionStatus {
     #[serde(rename = "transientFilesNotSyncingCount", default, skip_serializing_if = "Option::is_none")]
     pub transient_files_not_syncing_count: Option<i64>,
     #[doc = "Array of per-item errors coming from the last sync session."]
-    #[serde(rename = "filesNotSyncingErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filesNotSyncingErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files_not_syncing_errors: Vec<ServerEndpointFilesNotSyncingError>,
 }
 impl ServerEndpointSyncSessionStatus {
@@ -1086,7 +1126,11 @@ impl StorageSyncService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageSyncServiceArray {
     #[doc = "Collection of StorageSyncServices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageSyncService>,
 }
 impl azure_core::Continuable for StorageSyncServiceArray {
@@ -1248,7 +1292,11 @@ impl SyncGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupArray {
     #[doc = "Collection of SyncGroup."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncGroup>,
 }
 impl azure_core::Continuable for SyncGroupArray {
@@ -1337,7 +1385,11 @@ pub struct TriggerChangeDetectionParameters {
     #[serde(rename = "changeDetectionMode", default, skip_serializing_if = "Option::is_none")]
     pub change_detection_mode: Option<trigger_change_detection_parameters::ChangeDetectionMode>,
     #[doc = "Array of relative paths on the Azure File share to be included in the change detection. Can be files and directories."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<String>,
 }
 impl TriggerChangeDetectionParameters {
@@ -1415,7 +1467,11 @@ impl Workflow {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowArray {
     #[doc = "Collection of workflow items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workflow>,
 }
 impl azure_core::Continuable for WorkflowArray {
diff --git a/services/mgmt/storagesync/src/package_2019_10_01/models.rs b/services/mgmt/storagesync/src/package_2019_10_01/models.rs
index 777545c859..e9e5eec939 100644
--- a/services/mgmt/storagesync/src/package_2019_10_01/models.rs
+++ b/services/mgmt/storagesync/src/package_2019_10_01/models.rs
@@ -83,7 +83,11 @@ impl CloudEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudEndpointArray {
     #[doc = "Collection of CloudEndpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudEndpoint>,
 }
 impl azure_core::Continuable for CloudEndpointArray {
@@ -218,7 +222,11 @@ pub struct CloudTieringFilesNotTiering {
     #[serde(rename = "totalFileCount", default, skip_serializing_if = "Option::is_none")]
     pub total_file_count: Option<i64>,
     #[doc = "Array of tiering errors"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<FilesNotTieringError>,
 }
 impl CloudTieringFilesNotTiering {
@@ -371,7 +379,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
@@ -459,7 +471,12 @@ pub struct PostRestoreRequest {
     #[serde(rename = "failedFileList", default, skip_serializing_if = "Option::is_none")]
     pub failed_file_list: Option<String>,
     #[doc = "Post Restore restore file spec array."]
-    #[serde(rename = "restoreFileSpec", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreFileSpec",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_file_spec: Vec<RestoreFileSpec>,
 }
 impl PostRestoreRequest {
@@ -492,7 +509,12 @@ pub struct PreRestoreRequest {
     #[serde(rename = "backupMetadataPropertyBag", default, skip_serializing_if = "Option::is_none")]
     pub backup_metadata_property_bag: Option<String>,
     #[doc = "Pre Restore restore file spec array."]
-    #[serde(rename = "restoreFileSpec", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreFileSpec",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_file_spec: Vec<RestoreFileSpec>,
     #[doc = "Pre Restore pause wait for sync drain time period in seconds."]
     #[serde(
@@ -565,7 +587,11 @@ impl RegisteredServer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegisteredServerArray {
     #[doc = "Collection of Registered Server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegisteredServer>,
 }
 impl azure_core::Continuable for RegisteredServerArray {
@@ -719,7 +745,11 @@ pub struct ResourcesMoveInfo {
     #[serde(rename = "targetResourceGroup", default, skip_serializing_if = "Option::is_none")]
     pub target_resource_group: Option<String>,
     #[doc = "Collection of Resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<ResourceId>,
 }
 impl ResourcesMoveInfo {
@@ -760,7 +790,11 @@ impl ServerEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerEndpointArray {
     #[doc = "Collection of ServerEndpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerEndpoint>,
 }
 impl azure_core::Continuable for ServerEndpointArray {
@@ -982,7 +1016,12 @@ pub struct ServerEndpointRecallStatus {
     #[serde(rename = "totalRecallErrorsCount", default, skip_serializing_if = "Option::is_none")]
     pub total_recall_errors_count: Option<i64>,
     #[doc = "Array of recall errors"]
-    #[serde(rename = "recallErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recallErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recall_errors: Vec<ServerEndpointRecallError>,
 }
 impl ServerEndpointRecallStatus {
@@ -1165,7 +1204,11 @@ impl StorageSyncService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageSyncServiceArray {
     #[doc = "Collection of StorageSyncServices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageSyncService>,
 }
 impl azure_core::Continuable for StorageSyncServiceArray {
@@ -1354,7 +1397,11 @@ impl SyncGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupArray {
     #[doc = "Collection of SyncGroup."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncGroup>,
 }
 impl azure_core::Continuable for SyncGroupArray {
@@ -1427,7 +1474,12 @@ pub struct SyncSessionStatus {
     #[serde(rename = "transientFilesNotSyncingCount", default, skip_serializing_if = "Option::is_none")]
     pub transient_files_not_syncing_count: Option<i64>,
     #[doc = "Array of per-item errors coming from the last sync session."]
-    #[serde(rename = "filesNotSyncingErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filesNotSyncingErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files_not_syncing_errors: Vec<ServerEndpointFilesNotSyncingError>,
 }
 impl SyncSessionStatus {
@@ -1473,7 +1525,11 @@ pub struct TriggerChangeDetectionParameters {
     #[serde(rename = "changeDetectionMode", default, skip_serializing_if = "Option::is_none")]
     pub change_detection_mode: Option<trigger_change_detection_parameters::ChangeDetectionMode>,
     #[doc = "Array of relative paths on the Azure File share to be included in the change detection. Can be files and directories."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<String>,
 }
 impl TriggerChangeDetectionParameters {
@@ -1551,7 +1607,11 @@ impl Workflow {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowArray {
     #[doc = "Collection of workflow items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workflow>,
 }
 impl azure_core::Continuable for WorkflowArray {
diff --git a/services/mgmt/storagesync/src/package_2020_03_01/models.rs b/services/mgmt/storagesync/src/package_2020_03_01/models.rs
index 1dbe2c9f1d..7acdc8fe91 100644
--- a/services/mgmt/storagesync/src/package_2020_03_01/models.rs
+++ b/services/mgmt/storagesync/src/package_2020_03_01/models.rs
@@ -83,7 +83,11 @@ impl CloudEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudEndpointArray {
     #[doc = "Collection of CloudEndpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudEndpoint>,
 }
 impl azure_core::Continuable for CloudEndpointArray {
@@ -218,7 +222,11 @@ pub struct CloudTieringFilesNotTiering {
     #[serde(rename = "totalFileCount", default, skip_serializing_if = "Option::is_none")]
     pub total_file_count: Option<i64>,
     #[doc = "Array of tiering errors"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<FilesNotTieringError>,
 }
 impl CloudTieringFilesNotTiering {
@@ -582,7 +590,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
@@ -627,13 +639,22 @@ pub struct OperationResourceMetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported aggregation types for the metric."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Fill gaps in the metric with zero."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
     pub fill_gap_with_zero: Option<bool>,
     #[doc = "Dimensions for the metric specification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<OperationResourceMetricSpecificationDimension>,
 }
 impl OperationResourceMetricSpecification {
@@ -663,7 +684,12 @@ impl OperationResourceMetricSpecificationDimension {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationResourceServiceSpecification {
     #[doc = "List of metric specifications."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationResourceMetricSpecification>,
 }
 impl OperationResourceServiceSpecification {
@@ -745,7 +771,12 @@ pub struct PostRestoreRequest {
     #[serde(rename = "failedFileList", default, skip_serializing_if = "Option::is_none")]
     pub failed_file_list: Option<String>,
     #[doc = "Post Restore restore file spec array."]
-    #[serde(rename = "restoreFileSpec", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreFileSpec",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_file_spec: Vec<RestoreFileSpec>,
 }
 impl PostRestoreRequest {
@@ -778,7 +809,12 @@ pub struct PreRestoreRequest {
     #[serde(rename = "backupMetadataPropertyBag", default, skip_serializing_if = "Option::is_none")]
     pub backup_metadata_property_bag: Option<String>,
     #[doc = "Pre Restore restore file spec array."]
-    #[serde(rename = "restoreFileSpec", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreFileSpec",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_file_spec: Vec<RestoreFileSpec>,
     #[doc = "Pre Restore pause wait for sync drain time period in seconds."]
     #[serde(
@@ -823,7 +859,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -957,7 +997,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -972,10 +1016,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1134,7 +1188,11 @@ impl Serialize for RegisteredServerAgentVersionStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegisteredServerArray {
     #[doc = "Collection of Registered Server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegisteredServer>,
 }
 impl azure_core::Continuable for RegisteredServerArray {
@@ -1299,7 +1357,11 @@ pub struct ResourcesMoveInfo {
     #[serde(rename = "targetResourceGroup", default, skip_serializing_if = "Option::is_none")]
     pub target_resource_group: Option<String>,
     #[doc = "Collection of Resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<ResourceId>,
 }
 impl ResourcesMoveInfo {
@@ -1340,7 +1402,11 @@ impl ServerEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerEndpointArray {
     #[doc = "Collection of ServerEndpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerEndpoint>,
 }
 impl azure_core::Continuable for ServerEndpointArray {
@@ -1638,7 +1704,12 @@ pub struct ServerEndpointRecallStatus {
     #[serde(rename = "totalRecallErrorsCount", default, skip_serializing_if = "Option::is_none")]
     pub total_recall_errors_count: Option<i64>,
     #[doc = "Array of recall errors"]
-    #[serde(rename = "recallErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recallErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recall_errors: Vec<ServerEndpointRecallError>,
 }
 impl ServerEndpointRecallStatus {
@@ -1827,7 +1898,12 @@ pub struct ServerEndpointSyncSessionStatus {
     #[serde(rename = "transientFilesNotSyncingCount", default, skip_serializing_if = "Option::is_none")]
     pub transient_files_not_syncing_count: Option<i64>,
     #[doc = "Array of per-item errors coming from the last sync session."]
-    #[serde(rename = "filesNotSyncingErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filesNotSyncingErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files_not_syncing_errors: Vec<ServerEndpointFilesNotSyncingError>,
     #[doc = "Sync mode for the server endpoint."]
     #[serde(rename = "lastSyncMode", default, skip_serializing_if = "Option::is_none")]
@@ -2039,7 +2115,11 @@ impl StorageSyncService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageSyncServiceArray {
     #[doc = "Collection of StorageSyncServices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageSyncService>,
 }
 impl azure_core::Continuable for StorageSyncServiceArray {
@@ -2108,7 +2188,12 @@ pub struct StorageSyncServiceProperties {
     #[serde(rename = "lastOperationName", default, skip_serializing_if = "Option::is_none")]
     pub last_operation_name: Option<String>,
     #[doc = "List of private endpoint connection associated with the specified storage sync service"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl StorageSyncServiceProperties {
@@ -2233,7 +2318,11 @@ impl SyncGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupArray {
     #[doc = "Collection of SyncGroup."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncGroup>,
 }
 impl azure_core::Continuable for SyncGroupArray {
@@ -2322,7 +2411,11 @@ pub struct TriggerChangeDetectionParameters {
     #[serde(rename = "changeDetectionMode", default, skip_serializing_if = "Option::is_none")]
     pub change_detection_mode: Option<trigger_change_detection_parameters::ChangeDetectionMode>,
     #[doc = "Array of relative paths on the Azure File share to be included in the change detection. Can be files and directories."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<String>,
 }
 impl TriggerChangeDetectionParameters {
@@ -2400,7 +2493,11 @@ impl Workflow {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowArray {
     #[doc = "Collection of workflow items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workflow>,
 }
 impl azure_core::Continuable for WorkflowArray {
diff --git a/services/mgmt/storagesync/src/package_2020_09_01/models.rs b/services/mgmt/storagesync/src/package_2020_09_01/models.rs
index ae9d28e81a..59f1c7a73a 100644
--- a/services/mgmt/storagesync/src/package_2020_09_01/models.rs
+++ b/services/mgmt/storagesync/src/package_2020_09_01/models.rs
@@ -83,7 +83,11 @@ impl CloudEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudEndpointArray {
     #[doc = "Collection of CloudEndpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudEndpoint>,
 }
 impl azure_core::Continuable for CloudEndpointArray {
@@ -392,7 +396,11 @@ pub struct CloudTieringFilesNotTiering {
     #[serde(rename = "totalFileCount", default, skip_serializing_if = "Option::is_none")]
     pub total_file_count: Option<i64>,
     #[doc = "Array of tiering errors"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<FilesNotTieringError>,
 }
 impl CloudTieringFilesNotTiering {
@@ -793,7 +801,11 @@ pub struct OperationEntityListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
 }
 impl azure_core::Continuable for OperationEntityListResult {
@@ -838,13 +850,22 @@ pub struct OperationResourceMetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported aggregation types for the metric."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Fill gaps in the metric with zero."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
     pub fill_gap_with_zero: Option<bool>,
     #[doc = "Dimensions for the metric specification."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<OperationResourceMetricSpecificationDimension>,
 }
 impl OperationResourceMetricSpecification {
@@ -874,7 +895,12 @@ impl OperationResourceMetricSpecificationDimension {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationResourceServiceSpecification {
     #[doc = "List of metric specifications."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationResourceMetricSpecification>,
 }
 impl OperationResourceServiceSpecification {
@@ -956,7 +982,12 @@ pub struct PostRestoreRequest {
     #[serde(rename = "failedFileList", default, skip_serializing_if = "Option::is_none")]
     pub failed_file_list: Option<String>,
     #[doc = "Post Restore restore file spec array."]
-    #[serde(rename = "restoreFileSpec", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreFileSpec",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_file_spec: Vec<RestoreFileSpec>,
 }
 impl PostRestoreRequest {
@@ -989,7 +1020,12 @@ pub struct PreRestoreRequest {
     #[serde(rename = "backupMetadataPropertyBag", default, skip_serializing_if = "Option::is_none")]
     pub backup_metadata_property_bag: Option<String>,
     #[doc = "Pre Restore restore file spec array."]
-    #[serde(rename = "restoreFileSpec", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "restoreFileSpec",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restore_file_spec: Vec<RestoreFileSpec>,
     #[doc = "Pre Restore pause wait for sync drain time period in seconds."]
     #[serde(
@@ -1034,7 +1070,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl azure_core::Continuable for PrivateEndpointConnectionListResult {
@@ -1168,7 +1208,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -1183,10 +1227,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1345,7 +1399,11 @@ impl Serialize for RegisteredServerAgentVersionStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RegisteredServerArray {
     #[doc = "Collection of Registered Server."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RegisteredServer>,
 }
 impl azure_core::Continuable for RegisteredServerArray {
@@ -1516,7 +1574,11 @@ pub struct ResourcesMoveInfo {
     #[serde(rename = "targetResourceGroup", default, skip_serializing_if = "Option::is_none")]
     pub target_resource_group: Option<String>,
     #[doc = "Collection of Resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<ResourceId>,
 }
 impl ResourcesMoveInfo {
@@ -1557,7 +1619,11 @@ impl ServerEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerEndpointArray {
     #[doc = "Collection of ServerEndpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerEndpoint>,
 }
 impl azure_core::Continuable for ServerEndpointArray {
@@ -1887,7 +1953,12 @@ pub struct ServerEndpointRecallStatus {
     #[serde(rename = "totalRecallErrorsCount", default, skip_serializing_if = "Option::is_none")]
     pub total_recall_errors_count: Option<i64>,
     #[doc = "Array of recall errors"]
-    #[serde(rename = "recallErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recallErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recall_errors: Vec<ServerEndpointRecallError>,
 }
 impl ServerEndpointRecallStatus {
@@ -2032,7 +2103,12 @@ pub struct ServerEndpointSyncSessionStatus {
     #[serde(rename = "transientFilesNotSyncingCount", default, skip_serializing_if = "Option::is_none")]
     pub transient_files_not_syncing_count: Option<i64>,
     #[doc = "Array of per-item errors coming from the last sync session."]
-    #[serde(rename = "filesNotSyncingErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "filesNotSyncingErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files_not_syncing_errors: Vec<ServerEndpointFilesNotSyncingError>,
     #[doc = "Sync mode for the server endpoint."]
     #[serde(rename = "lastSyncMode", default, skip_serializing_if = "Option::is_none")]
@@ -2247,7 +2323,11 @@ impl StorageSyncService {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageSyncServiceArray {
     #[doc = "Collection of StorageSyncServices."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageSyncService>,
 }
 impl azure_core::Continuable for StorageSyncServiceArray {
@@ -2316,7 +2396,12 @@ pub struct StorageSyncServiceProperties {
     #[serde(rename = "lastOperationName", default, skip_serializing_if = "Option::is_none")]
     pub last_operation_name: Option<String>,
     #[doc = "List of private endpoint connection associated with the specified storage sync service"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl StorageSyncServiceProperties {
@@ -2441,7 +2526,11 @@ impl SyncGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SyncGroupArray {
     #[doc = "Collection of SyncGroup."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SyncGroup>,
 }
 impl azure_core::Continuable for SyncGroupArray {
@@ -2530,7 +2619,11 @@ pub struct TriggerChangeDetectionParameters {
     #[serde(rename = "changeDetectionMode", default, skip_serializing_if = "Option::is_none")]
     pub change_detection_mode: Option<trigger_change_detection_parameters::ChangeDetectionMode>,
     #[doc = "Array of relative paths on the Azure File share to be included in the change detection. Can be files and directories."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<String>,
 }
 impl TriggerChangeDetectionParameters {
@@ -2608,7 +2701,11 @@ impl Workflow {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowArray {
     #[doc = "Collection of workflow items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workflow>,
 }
 impl azure_core::Continuable for WorkflowArray {
diff --git a/services/mgmt/storsimple1200series/src/package_2016_10/models.rs b/services/mgmt/storsimple1200series/src/package_2016_10/models.rs
index 0c2cbf46f3..19d30432b2 100644
--- a/services/mgmt/storsimple1200series/src/package_2016_10/models.rs
+++ b/services/mgmt/storsimple1200series/src/package_2016_10/models.rs
@@ -269,7 +269,12 @@ pub struct AlertSettingsProperties {
     #[serde(rename = "alertNotificationCulture")]
     pub alert_notification_culture: String,
     #[doc = "List of email addresses (apart from admin/co-admin of subscription) to whom the alert emails need to be sent"]
-    #[serde(rename = "additionalRecipientEmailList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalRecipientEmailList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_recipient_email_list: Vec<String>,
 }
 impl AlertSettingsProperties {
@@ -844,13 +849,23 @@ pub struct DeviceProperties {
     #[serde(rename = "activationTime", default, with = "azure_core::date::rfc3339::option")]
     pub activation_time: Option<time::OffsetDateTime>,
     #[doc = "Operations that are allowed on the device based on its current state"]
-    #[serde(rename = "allowedDeviceOperations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedDeviceOperations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_device_operations: Vec<String>,
     #[doc = "Language culture setting on the device. For eg: \"en-US\""]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub culture: Option<String>,
     #[doc = "Device can be configured either as FileServer or IscsiServer"]
-    #[serde(rename = "deviceCapabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deviceCapabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub device_capabilities: Vec<String>,
     #[doc = "Short description given for the device"]
     #[serde(rename = "deviceDescription", default, skip_serializing_if = "Option::is_none")]
@@ -976,7 +991,11 @@ pub struct Error {
     #[serde(rename = "errorCode")]
     pub error_code: String,
     pub message: Message,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<Item>,
 }
 impl azure_core::Continuable for Error {
@@ -997,7 +1016,12 @@ impl Error {
 #[doc = "The Failover request object."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FailoverRequest {
-    #[serde(rename = "accesspointIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accesspointIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub accesspoint_ids: Vec<String>,
     #[serde(rename = "targetDeviceId", default, skip_serializing_if = "Option::is_none")]
     pub target_device_id: Option<String>,
@@ -1426,7 +1450,12 @@ pub mod job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct JobErrorDetails {
     #[doc = "The error details."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<JobErrorItem>,
     #[doc = "The code intended for programmatic access"]
     pub code: String,
@@ -1446,7 +1475,11 @@ impl JobErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct JobErrorItem {
     #[doc = "The recommended actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
     #[doc = "The code intended for programmatic access"]
     pub code: String,
@@ -1542,7 +1575,12 @@ pub struct JobProperties {
     #[serde(rename = "entityType", default, skip_serializing_if = "Option::is_none")]
     pub entity_type: Option<String>,
     #[doc = "The job stages."]
-    #[serde(rename = "jobStages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobStages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_stages: Vec<JobStage>,
     #[doc = "The device id in which the job is currently running"]
     #[serde(rename = "deviceId", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/storsimple8000series/src/package_2017_06/models.rs b/services/mgmt/storsimple8000series/src/package_2017_06/models.rs
index fab0566dd8..e5fba16f45 100644
--- a/services/mgmt/storsimple8000series/src/package_2017_06/models.rs
+++ b/services/mgmt/storsimple8000series/src/package_2017_06/models.rs
@@ -187,7 +187,12 @@ pub struct AlertNotificationProperties {
     #[serde(rename = "notificationToServiceOwners", default, skip_serializing_if = "Option::is_none")]
     pub notification_to_service_owners: Option<alert_notification_properties::NotificationToServiceOwners>,
     #[doc = "The alert notification email list."]
-    #[serde(rename = "additionalRecipientEmailList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalRecipientEmailList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_recipient_email_list: Vec<String>,
 }
 impl AlertNotificationProperties {
@@ -1249,10 +1254,20 @@ pub struct DnsSettings {
     #[serde(rename = "primaryIpv6DnsServer", default, skip_serializing_if = "Option::is_none")]
     pub primary_ipv6_dns_server: Option<String>,
     #[doc = "The secondary IPv4 DNS server for the device"]
-    #[serde(rename = "secondaryDnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "secondaryDnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secondary_dns_servers: Vec<String>,
     #[doc = "The secondary IPv6 DNS server for the device"]
-    #[serde(rename = "secondaryIpv6DnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "secondaryIpv6DnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secondary_ipv6_dns_servers: Vec<String>,
 }
 impl DnsSettings {
@@ -1641,7 +1656,12 @@ pub struct FailoverRequest {
     #[serde(rename = "targetDeviceId", default, skip_serializing_if = "Option::is_none")]
     pub target_device_id: Option<String>,
     #[doc = "The list of path IDs of the volume containers which needs to be failed-over to the target device."]
-    #[serde(rename = "volumeContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_containers: Vec<String>,
 }
 impl FailoverRequest {
@@ -1653,7 +1673,12 @@ impl FailoverRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FailoverSet {
     #[doc = "The list of meta data of volume containers, which are part of the failover set."]
-    #[serde(rename = "volumeContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_containers: Vec<VolumeContainerFailoverMetadata>,
     #[doc = "The eligibility result of failover set, for failover."]
     #[serde(rename = "eligibilityResult", default, skip_serializing_if = "Option::is_none")]
@@ -1683,7 +1708,11 @@ impl FailoverSetEligibilityResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FailoverSetsList {
     #[doc = "The list of failover sets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FailoverSet>,
 }
 impl azure_core::Continuable for FailoverSetsList {
@@ -1761,7 +1790,11 @@ pub mod failover_target {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FailoverTargetsList {
     #[doc = "The list of all the failover targets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FailoverTarget>,
 }
 impl azure_core::Continuable for FailoverTargetsList {
@@ -1971,7 +2004,12 @@ pub mod job {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct JobErrorDetails {
     #[doc = "The error details."]
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<JobErrorItem>,
     #[doc = "The error code intended for programmatic access."]
     pub code: String,
@@ -1991,7 +2029,11 @@ impl JobErrorDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct JobErrorItem {
     #[doc = "The recommended actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recommendations: Vec<String>,
     #[doc = "The error code intended for programmatic access."]
     pub code: String,
@@ -2061,7 +2103,12 @@ pub struct JobProperties {
     #[serde(rename = "entityType", default, skip_serializing_if = "Option::is_none")]
     pub entity_type: Option<String>,
     #[doc = "The job stages."]
-    #[serde(rename = "jobStages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "jobStages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub job_stages: Vec<JobStage>,
     #[doc = "The device ID in which the job ran."]
     #[serde(rename = "deviceId", default, skip_serializing_if = "Option::is_none")]
@@ -2171,7 +2218,12 @@ impl Key {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListFailoverTargetsRequest {
     #[doc = "The list of path IDs of the volume containers that needs to be failed-over, for which we want to fetch the eligible targets."]
-    #[serde(rename = "volumeContainers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeContainers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_containers: Vec<String>,
 }
 impl ListFailoverTargetsRequest {
@@ -2395,10 +2447,19 @@ pub struct MetricDefinition {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "The available metric granularities."]
-    #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricAvailabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_availabilities: Vec<MetricAvailablity>,
     #[doc = "The available metric dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "The category of the metric."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2439,7 +2500,11 @@ pub mod metric_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricDefinitionList {
     #[doc = "The list of metric definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MetricDefinition>,
 }
 impl azure_core::Continuable for MetricDefinitionList {
@@ -2505,7 +2570,11 @@ impl MetricFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetricList {
     #[doc = "The value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Metrics>,
 }
 impl azure_core::Continuable for MetricList {
@@ -2568,7 +2637,11 @@ pub struct Metrics {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<MetricName>,
     #[doc = "The metric dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "The unit of the metric data."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2577,7 +2650,11 @@ pub struct Metrics {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "The list of the metric data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<MetricData>,
 }
 impl Metrics {
@@ -2933,7 +3010,12 @@ pub struct ScheduleRecurrence {
     #[serde(rename = "recurrenceValue")]
     pub recurrence_value: i32,
     #[doc = "The week days list. Applicable only for schedules of recurrence type 'weekly'."]
-    #[serde(rename = "weeklyDaysList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weeklyDaysList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub weekly_days_list: Vec<String>,
 }
 impl ScheduleRecurrence {
@@ -2960,7 +3042,12 @@ pub mod schedule_recurrence {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecondaryDnsSettings {
     #[doc = "The list of secondary DNS Server IP addresses."]
-    #[serde(rename = "secondaryDnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "secondaryDnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secondary_dns_servers: Vec<String>,
 }
 impl SecondaryDnsSettings {
@@ -3189,7 +3276,11 @@ pub struct TargetEligibilityResult {
     #[serde(rename = "eligibilityStatus", default, skip_serializing_if = "Option::is_none")]
     pub eligibility_status: Option<target_eligibility_result::EligibilityStatus>,
     #[doc = "The list of error messages, if a device does not qualify as a failover target device."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub messages: Vec<TargetEligibilityErrorMessage>,
 }
 impl TargetEligibilityResult {
@@ -3247,7 +3338,12 @@ pub struct TimeSettingsProperties {
     #[serde(rename = "primaryTimeServer", default, skip_serializing_if = "Option::is_none")]
     pub primary_time_server: Option<String>,
     #[doc = "The secondary Network Time Protocol (NTP) server name, like 'time.contoso.com'. It's optional."]
-    #[serde(rename = "secondaryTimeServer", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "secondaryTimeServer",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secondary_time_server: Vec<String>,
 }
 impl TimeSettingsProperties {
@@ -3360,7 +3456,11 @@ pub struct VolumeContainerFailoverMetadata {
     #[serde(rename = "volumeContainerId", default, skip_serializing_if = "Option::is_none")]
     pub volume_container_id: Option<String>,
     #[doc = "The list of metadata of volumes inside the volume container, which contains valid cloud snapshots."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volumes: Vec<VolumeFailoverMetadata>,
 }
 impl VolumeContainerFailoverMetadata {
@@ -3527,7 +3627,12 @@ pub struct VolumeProperties {
     #[serde(rename = "monitoringStatus")]
     pub monitoring_status: volume_properties::MonitoringStatus,
     #[doc = "The IDs of the backup policies, in which this volume is part of."]
-    #[serde(rename = "backupPolicyIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "backupPolicyIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub backup_policy_ids: Vec<String>,
 }
 impl VolumeProperties {
diff --git a/services/mgmt/streamanalytics/src/package_2021_10_preview/models.rs b/services/mgmt/streamanalytics/src/package_2021_10_preview/models.rs
index fd82cd7377..af71eb6f9f 100644
--- a/services/mgmt/streamanalytics/src/package_2021_10_preview/models.rs
+++ b/services/mgmt/streamanalytics/src/package_2021_10_preview/models.rs
@@ -197,10 +197,18 @@ pub struct AzureMachineLearningServiceFunctionBindingProperties {
     #[serde(rename = "apiKey", default, skip_serializing_if = "Option::is_none")]
     pub api_key: Option<String>,
     #[doc = "The inputs for the Azure Machine Learning web service endpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<AzureMachineLearningServiceInputColumn>,
     #[doc = "A list of outputs from the Azure Machine Learning web service endpoint execution."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<AzureMachineLearningServiceOutputColumn>,
     #[doc = "Number between 1 and 10000 describing maximum number of rows for every Azure ML RRS execute request. Default is 1000."]
     #[serde(rename = "batchSize", default, skip_serializing_if = "Option::is_none")]
@@ -277,7 +285,12 @@ pub struct AzureMachineLearningServiceInputs {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of input columns for the Azure Machine Learning web service endpoint."]
-    #[serde(rename = "columnNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "columnNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub column_names: Vec<AzureMachineLearningServiceInputColumn>,
 }
 impl AzureMachineLearningServiceInputs {
@@ -333,7 +346,11 @@ pub struct AzureMachineLearningStudioFunctionBindingProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub inputs: Option<AzureMachineLearningStudioInputs>,
     #[doc = "A list of outputs from the Azure Machine Learning Studio endpoint execution."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<AzureMachineLearningStudioOutputColumn>,
     #[doc = "Number between 1 and 10000 describing maximum number of rows for every Azure ML RRS execute request. Default is 1000."]
     #[serde(rename = "batchSize", default, skip_serializing_if = "Option::is_none")]
@@ -401,7 +418,12 @@ pub struct AzureMachineLearningStudioInputs {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of input columns for the Azure Machine Learning Studio endpoint."]
-    #[serde(rename = "columnNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "columnNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub column_names: Vec<AzureMachineLearningStudioInputColumn>,
 }
 impl AzureMachineLearningStudioInputs {
@@ -629,7 +651,12 @@ pub struct AzureTableOutputDataSourceProperties {
     #[serde(rename = "rowKey", default, skip_serializing_if = "Option::is_none")]
     pub row_key: Option<String>,
     #[doc = "If specified, each item in the array is the name of a column to remove (if present) from output event entities."]
-    #[serde(rename = "columnsToRemove", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "columnsToRemove",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns_to_remove: Vec<String>,
     #[doc = "The number of rows to write to the Azure Table at a time."]
     #[serde(rename = "batchSize", default, skip_serializing_if = "Option::is_none")]
@@ -644,7 +671,12 @@ impl AzureTableOutputDataSourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobDataSourceProperties {
     #[doc = "A list of one or more Azure Storage accounts. Required on PUT (CreateOrReplace) requests."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<StorageAccount>,
     #[doc = "The name of a container within the associated Storage account. This container contains either the blob(s) to be read from or written to. Required on PUT (CreateOrReplace) requests."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -936,7 +968,11 @@ impl ClusterJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterJobListResult {
     #[doc = "A list of streaming jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClusterJob>,
     #[doc = "The URL to fetch the next set of streaming jobs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -957,7 +993,11 @@ impl ClusterJobListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListResult {
     #[doc = "A list of clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "The URL to fetch the next set of clusters."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1137,10 +1177,18 @@ pub struct CompileQuery {
     #[doc = "The query to compile."]
     pub query: String,
     #[doc = "The inputs for the query compilation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<QueryInput>,
     #[doc = "The functions for the query compilation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub functions: Vec<QueryFunction>,
     #[doc = "Describes the type of the job. Valid values are `Cloud` and 'Edge'."]
     #[serde(rename = "jobType")]
@@ -1342,7 +1390,11 @@ impl DiagnosticCondition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Diagnostics {
     #[doc = "A collection of zero or more conditions applicable to the resource, or to the job overall, that warrant customer attention."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<DiagnosticCondition>,
 }
 impl Diagnostics {
@@ -1466,7 +1518,11 @@ pub mod error {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "Error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<ErrorDetails>,
     }
     impl Error {
@@ -1572,10 +1628,20 @@ pub struct EventGridStreamInputDataSourceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub schema: Option<EventGridEventSchemaType>,
     #[doc = "A list of one or more Azure Storage accounts. Required on PUT (CreateOrReplace) requests."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<StorageAccount>,
     #[doc = "List of Event Types that are supported by the Event Grid adapter."]
-    #[serde(rename = "eventTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eventTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub event_types: Vec<String>,
 }
 impl EventGridStreamInputDataSourceProperties {
@@ -1626,7 +1692,12 @@ pub struct EventHubOutputDataSourceProperties {
     #[serde(rename = "partitionKey", default, skip_serializing_if = "Option::is_none")]
     pub partition_key: Option<String>,
     #[doc = "The properties associated with this Event Hub output."]
-    #[serde(rename = "propertyColumns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyColumns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_columns: Vec<String>,
 }
 impl EventHubOutputDataSourceProperties {
@@ -1860,7 +1931,11 @@ impl FunctionBinding {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FunctionConfiguration {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<FunctionInput>,
     #[doc = "Describes the output of a function."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1893,7 +1968,11 @@ impl FunctionInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FunctionListResult {
     #[doc = "A list of functions under a streaming job. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Function>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2136,7 +2215,11 @@ pub mod get_streaming_job_sku_result {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GetStreamingJobSkuResults {
     #[doc = "The list of available SKUs that the streaming job can use."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GetStreamingJobSkuResult>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2192,7 +2275,11 @@ impl Input {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InputListResult {
     #[doc = "A list of inputs under a streaming job. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Input>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2613,7 +2700,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Stream Analytics operations supported by the Microsoft.StreamAnalytics resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2697,7 +2788,11 @@ impl Serialize for OutputErrorPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OutputListResult {
     #[doc = "A list of outputs under a streaming job. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Output>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2736,7 +2831,12 @@ pub struct OutputProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "A list of the last output event times for each output partition. The index of the array corresponds to the partition number."]
-    #[serde(rename = "lastOutputEventTimestamps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "lastOutputEventTimestamps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub last_output_event_timestamps: Vec<LastOutputEventTimestamp>,
     #[doc = "Settings which determine whether to send watermarks to downstream."]
     #[serde(rename = "watermarkSettings", default, skip_serializing_if = "Option::is_none")]
@@ -2995,7 +3095,11 @@ impl PrivateEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointListResult {
     #[doc = "A list of private endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpoint>,
     #[doc = "The URL to fetch the next set of private endpoints."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3019,7 +3123,12 @@ pub struct PrivateEndpointProperties {
     #[serde(rename = "createdDate", default, skip_serializing_if = "Option::is_none")]
     pub created_date: Option<String>,
     #[doc = "A list of connections to the remote resource. Immutable after it is set."]
-    #[serde(rename = "manualPrivateLinkServiceConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "manualPrivateLinkServiceConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manual_private_link_service_connections: Vec<PrivateLinkServiceConnection>,
 }
 impl PrivateEndpointProperties {
@@ -3064,7 +3173,12 @@ pub struct PrivateLinkServiceConnectionProperties {
     #[serde(rename = "privateLinkServiceId", default, skip_serializing_if = "Option::is_none")]
     pub private_link_service_id: Option<String>,
     #[doc = "The ID(s) of the group(s) obtained from the remote resource that this private endpoint should connect to. Required on PUT (CreateOrUpdate) requests."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "A message passed to the owner of the remote resource with this connection request. Restricted to 140 chars."]
     #[serde(rename = "requestMessage", default, skip_serializing_if = "Option::is_none")]
@@ -3120,19 +3234,39 @@ impl QueryCompilationError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryCompilationResult {
     #[doc = "Error messages produced by the compiler."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<QueryCompilationError>,
     #[doc = "Warning messages produced by the compiler."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub warnings: Vec<String>,
     #[doc = "All input names used by the query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<String>,
     #[doc = "All output names used by the query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<String>,
     #[doc = "All function names used by the query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub functions: Vec<String>,
 }
 impl QueryCompilationResult {
@@ -3476,7 +3610,11 @@ pub struct SampleInputResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<SampleInputResultStatus>,
     #[doc = "Diagnostics messages. E.g. message indicating some partitions from the input have no data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub diagnostics: Vec<String>,
     #[doc = "A SAS URL to download the sampled input data."]
     #[serde(rename = "eventsDownloadUrl", default, skip_serializing_if = "Option::is_none")]
@@ -3611,7 +3749,12 @@ pub struct ServiceBusQueueOutputDataSourceProperties {
     #[serde(rename = "queueName", default, skip_serializing_if = "Option::is_none")]
     pub queue_name: Option<String>,
     #[doc = "A string array of the names of output columns to be attached to Service Bus messages as custom properties."]
-    #[serde(rename = "propertyColumns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyColumns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_columns: Vec<String>,
     #[doc = "The system properties associated with the Service Bus Queue. The following system properties are supported: ReplyToSessionId, ContentType, To, Subject, CorrelationId, TimeToLive, PartitionKey, SessionId, ScheduledEnqueueTime, MessageId, ReplyTo, Label, ScheduledEnqueueTimeUtc."]
     #[serde(rename = "systemPropertyColumns", default, skip_serializing_if = "Option::is_none")]
@@ -3648,7 +3791,12 @@ pub struct ServiceBusTopicOutputDataSourceProperties {
     #[serde(rename = "topicName", default, skip_serializing_if = "Option::is_none")]
     pub topic_name: Option<String>,
     #[doc = "A string array of the names of output columns to be attached to Service Bus messages as custom properties."]
-    #[serde(rename = "propertyColumns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyColumns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_columns: Vec<String>,
     #[doc = "The system properties associated with the Service Bus Topic Output. The following system properties are supported: ReplyToSessionId, ContentType, To, Subject, CorrelationId, TimeToLive, PartitionKey, SessionId, ScheduledEnqueueTime, MessageId, ReplyTo, Label, ScheduledEnqueueTimeUtc."]
     #[serde(rename = "systemPropertyColumns", default, skip_serializing_if = "Option::is_none")]
@@ -3728,7 +3876,12 @@ pub struct SkuCapacity {
     #[serde(rename = "scaleType", default, skip_serializing_if = "Option::is_none")]
     pub scale_type: Option<sku_capacity::ScaleType>,
     #[doc = "Specifies the valid streaming units a streaming job can scale to."]
-    #[serde(rename = "allowedValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_values: Vec<i32>,
 }
 impl SkuCapacity {
@@ -3867,7 +4020,11 @@ impl StreamingJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingJobListResult {
     #[doc = "A list of streaming jobs. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingJob>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3933,16 +4090,28 @@ pub struct StreamingJobProperties {
     #[serde(rename = "createdDate", default, with = "azure_core::date::rfc3339::option")]
     pub created_date: Option<time::OffsetDateTime>,
     #[doc = "A list of one or more inputs to the streaming job. The name property for each input is required when specifying this property in a PUT request. This property cannot be modify via a PATCH operation. You must use the PATCH API available for the individual input."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<Input>,
     #[doc = "A transformation object, containing all information associated with the named transformation. All transformations are contained under a streaming job."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub transformation: Option<Transformation>,
     #[doc = "A list of one or more outputs for the streaming job. The name property for each output is required when specifying this property in a PUT request. This property cannot be modify via a PATCH operation. You must use the PATCH API available for the individual output."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<Output>,
     #[doc = "A list of one or more functions for the streaming job. The name property for each function is required when specifying this property in a PUT request. This property cannot be modify via a PATCH operation. You must use the PATCH API available for the individual transformation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub functions: Vec<Function>,
     #[doc = "The current entity tag for the streaming job. This is an opaque string. You can use it to detect whether the resource has changed between requests. You can also use it in the If-Match or If-None-Match headers for write operations for optimistic concurrency."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4096,7 +4265,11 @@ pub mod subscription_quota {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionQuotasListResult {
     #[doc = "List of quotas for the subscription in a particular region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionQuota>,
 }
 impl SubscriptionQuotasListResult {
@@ -4251,7 +4424,12 @@ pub struct TransformationProperties {
     #[serde(rename = "streamingUnits", default, skip_serializing_if = "Option::is_none")]
     pub streaming_units: Option<i32>,
     #[doc = "Specifies the valid streaming units a streaming job can scale to."]
-    #[serde(rename = "validStreamingUnits", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validStreamingUnits",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub valid_streaming_units: Vec<i32>,
     #[doc = "Specifies the query that will be run in the streaming job. You can learn more about the Stream Analytics Query Language (SAQL) here: https://msdn.microsoft.com/library/azure/dn834998 . Required on PUT (CreateOrReplace) requests."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/streamanalytics/src/package_pure_2016_03/models.rs b/services/mgmt/streamanalytics/src/package_pure_2016_03/models.rs
index d975d9a89e..38427dd9d2 100644
--- a/services/mgmt/streamanalytics/src/package_pure_2016_03/models.rs
+++ b/services/mgmt/streamanalytics/src/package_pure_2016_03/models.rs
@@ -101,7 +101,11 @@ pub struct AzureMachineLearningWebServiceFunctionBindingProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub inputs: Option<AzureMachineLearningWebServiceInputs>,
     #[doc = "A list of outputs from the Azure Machine Learning web service endpoint execution."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<AzureMachineLearningWebServiceOutputColumn>,
     #[doc = "Number between 1 and 10000 describing maximum number of rows for every Azure ML RRS execute request. Default is 1000."]
     #[serde(rename = "batchSize", default, skip_serializing_if = "Option::is_none")]
@@ -169,7 +173,12 @@ pub struct AzureMachineLearningWebServiceInputs {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of input columns for the Azure Machine Learning web service endpoint."]
-    #[serde(rename = "columnNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "columnNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub column_names: Vec<AzureMachineLearningWebServiceInputColumn>,
 }
 impl AzureMachineLearningWebServiceInputs {
@@ -280,7 +289,12 @@ pub struct AzureTableOutputDataSourceProperties {
     #[serde(rename = "rowKey", default, skip_serializing_if = "Option::is_none")]
     pub row_key: Option<String>,
     #[doc = "If specified, each item in the array is the name of a column to remove (if present) from output event entities."]
-    #[serde(rename = "columnsToRemove", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "columnsToRemove",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns_to_remove: Vec<String>,
     #[doc = "The number of rows to write to the Azure Table at a time."]
     #[serde(rename = "batchSize", default, skip_serializing_if = "Option::is_none")]
@@ -295,7 +309,12 @@ impl AzureTableOutputDataSourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobDataSourceProperties {
     #[doc = "A list of one or more Azure Storage accounts. Required on PUT (CreateOrReplace) requests."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<StorageAccount>,
     #[doc = "The name of a container within the associated Storage account. This container contains either the blob(s) to be read from or written to. Required on PUT (CreateOrReplace) requests."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -492,7 +511,11 @@ impl DiagnosticCondition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Diagnostics {
     #[doc = "A collection of zero or more conditions applicable to the resource, or to the job overall, that warrant customer attention."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<DiagnosticCondition>,
 }
 impl Diagnostics {
@@ -613,7 +636,11 @@ pub mod error {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "Error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<ErrorDetails>,
     }
     impl Error {
@@ -852,7 +879,11 @@ impl FunctionInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FunctionListResult {
     #[doc = "A list of functions under a streaming job. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Function>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -926,7 +957,11 @@ impl Input {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InputListResult {
     #[doc = "A list of inputs under a streaming job. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Input>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1201,7 +1236,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Stream Analytics operations supported by the Microsoft.StreamAnalytics resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1285,7 +1324,11 @@ impl Serialize for OutputErrorPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OutputListResult {
     #[doc = "A list of outputs under a streaming job. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Output>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1479,7 +1522,11 @@ impl ResourceTestStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScalarFunctionConfiguration {
     #[doc = "A list of inputs describing the parameters of the function."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<FunctionInput>,
     #[doc = "Describes the output of a function."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1566,7 +1613,12 @@ pub struct ServiceBusQueueOutputDataSourceProperties {
     #[serde(rename = "queueName", default, skip_serializing_if = "Option::is_none")]
     pub queue_name: Option<String>,
     #[doc = "A string array of the names of output columns to be attached to Service Bus messages as custom properties."]
-    #[serde(rename = "propertyColumns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyColumns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_columns: Vec<String>,
 }
 impl ServiceBusQueueOutputDataSourceProperties {
@@ -1600,7 +1652,12 @@ pub struct ServiceBusTopicOutputDataSourceProperties {
     #[serde(rename = "topicName", default, skip_serializing_if = "Option::is_none")]
     pub topic_name: Option<String>,
     #[doc = "A string array of the names of output columns to be attached to Service Bus messages as custom properties."]
-    #[serde(rename = "propertyColumns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyColumns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_columns: Vec<String>,
 }
 impl ServiceBusTopicOutputDataSourceProperties {
@@ -1735,7 +1792,11 @@ impl StreamingJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingJobListResult {
     #[doc = "A list of streaming jobs. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingJob>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1798,16 +1859,28 @@ pub struct StreamingJobProperties {
     #[serde(rename = "createdDate", default, with = "azure_core::date::rfc3339::option")]
     pub created_date: Option<time::OffsetDateTime>,
     #[doc = "A list of one or more inputs to the streaming job. The name property for each input is required when specifying this property in a PUT request. This property cannot be modify via a PATCH operation. You must use the PATCH API available for the individual input."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<Input>,
     #[doc = "A transformation object, containing all information associated with the named transformation. All transformations are contained under a streaming job."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub transformation: Option<Transformation>,
     #[doc = "A list of one or more outputs for the streaming job. The name property for each output is required when specifying this property in a PUT request. This property cannot be modify via a PATCH operation. You must use the PATCH API available for the individual output."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<Output>,
     #[doc = "A list of one or more functions for the streaming job. The name property for each function is required when specifying this property in a PUT request. This property cannot be modify via a PATCH operation. You must use the PATCH API available for the individual transformation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub functions: Vec<Function>,
     #[doc = "The current entity tag for the streaming job. This is an opaque string. You can use it to detect whether the resource has changed between requests. You can also use it in the If-Match or If-None-Match headers for write operations for optimistic concurrency."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1872,7 +1945,11 @@ pub mod subscription_quota {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionQuotasListResult {
     #[doc = "List of quotas for the subscription in a particular region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionQuota>,
 }
 impl SubscriptionQuotasListResult {
diff --git a/services/mgmt/streamanalytics/src/package_pure_2017_04_preview/models.rs b/services/mgmt/streamanalytics/src/package_pure_2017_04_preview/models.rs
index 5f63003185..202ff45c48 100644
--- a/services/mgmt/streamanalytics/src/package_pure_2017_04_preview/models.rs
+++ b/services/mgmt/streamanalytics/src/package_pure_2017_04_preview/models.rs
@@ -197,10 +197,18 @@ pub struct AzureMachineLearningServiceFunctionBindingProperties {
     #[serde(rename = "apiKey", default, skip_serializing_if = "Option::is_none")]
     pub api_key: Option<String>,
     #[doc = "The inputs for the Azure Machine Learning web service endpoint."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<AzureMachineLearningServiceInputColumn>,
     #[doc = "A list of outputs from the Azure Machine Learning web service endpoint execution."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<AzureMachineLearningServiceOutputColumn>,
     #[doc = "Number between 1 and 10000 describing maximum number of rows for every Azure ML RRS execute request. Default is 1000."]
     #[serde(rename = "batchSize", default, skip_serializing_if = "Option::is_none")]
@@ -271,7 +279,12 @@ pub struct AzureMachineLearningServiceInputs {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of input columns for the Azure Machine Learning web service endpoint."]
-    #[serde(rename = "columnNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "columnNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub column_names: Vec<AzureMachineLearningServiceInputColumn>,
 }
 impl AzureMachineLearningServiceInputs {
@@ -327,7 +340,11 @@ pub struct AzureMachineLearningStudioFunctionBindingProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub inputs: Option<AzureMachineLearningStudioInputs>,
     #[doc = "A list of outputs from the Azure Machine Learning Studio endpoint execution."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<AzureMachineLearningStudioOutputColumn>,
     #[doc = "Number between 1 and 10000 describing maximum number of rows for every Azure ML RRS execute request. Default is 1000."]
     #[serde(rename = "batchSize", default, skip_serializing_if = "Option::is_none")]
@@ -395,7 +412,12 @@ pub struct AzureMachineLearningStudioInputs {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of input columns for the Azure Machine Learning Studio endpoint."]
-    #[serde(rename = "columnNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "columnNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub column_names: Vec<AzureMachineLearningStudioInputColumn>,
 }
 impl AzureMachineLearningStudioInputs {
@@ -620,7 +642,12 @@ pub struct AzureTableOutputDataSourceProperties {
     #[serde(rename = "rowKey", default, skip_serializing_if = "Option::is_none")]
     pub row_key: Option<String>,
     #[doc = "If specified, each item in the array is the name of a column to remove (if present) from output event entities."]
-    #[serde(rename = "columnsToRemove", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "columnsToRemove",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns_to_remove: Vec<String>,
     #[doc = "The number of rows to write to the Azure Table at a time."]
     #[serde(rename = "batchSize", default, skip_serializing_if = "Option::is_none")]
@@ -635,7 +662,12 @@ impl AzureTableOutputDataSourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobDataSourceProperties {
     #[doc = "A list of one or more Azure Storage accounts. Required on PUT (CreateOrReplace) requests."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<StorageAccount>,
     #[doc = "The name of a container within the associated Storage account. This container contains either the blob(s) to be read from or written to. Required on PUT (CreateOrReplace) requests."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -869,10 +901,18 @@ pub struct CompileQuery {
     #[doc = "The query to compile."]
     pub query: String,
     #[doc = "The inputs for the query compilation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<QueryInput>,
     #[doc = "The functions for the query compilation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub functions: Vec<QueryFunction>,
     #[doc = "Describes the type of the job. Valid values are `Cloud` and 'Edge'."]
     #[serde(rename = "jobType")]
@@ -1029,7 +1069,11 @@ impl DiagnosticCondition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Diagnostics {
     #[doc = "A collection of zero or more conditions applicable to the resource, or to the job overall, that warrant customer attention."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<DiagnosticCondition>,
 }
 impl Diagnostics {
@@ -1150,7 +1194,11 @@ pub mod error {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "Error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<ErrorDetails>,
     }
     impl Error {
@@ -1231,7 +1279,12 @@ pub struct EventHubOutputDataSourceProperties {
     #[doc = "The key/column that is used to determine to which partition to send event data."]
     #[serde(rename = "partitionKey", default, skip_serializing_if = "Option::is_none")]
     pub partition_key: Option<String>,
-    #[serde(rename = "propertyColumns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyColumns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_columns: Vec<String>,
 }
 impl EventHubOutputDataSourceProperties {
@@ -1428,7 +1481,11 @@ impl FunctionBinding {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FunctionConfiguration {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<FunctionInput>,
     #[doc = "Describes the output of a function."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1461,7 +1518,11 @@ impl FunctionInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FunctionListResult {
     #[doc = "A list of functions under a streaming job. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Function>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1556,7 +1617,11 @@ impl Input {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InputListResult {
     #[doc = "A list of inputs under a streaming job. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Input>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1853,7 +1918,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Stream Analytics operations supported by the Microsoft.StreamAnalytics resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1937,7 +2006,11 @@ impl Serialize for OutputErrorPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OutputListResult {
     #[doc = "A list of outputs under a streaming job. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Output>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2117,19 +2190,39 @@ impl QueryCompilationError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryCompilationResult {
     #[doc = "Error messages produced by the compiler."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<QueryCompilationError>,
     #[doc = "Warning messages produced by the compiler."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub warnings: Vec<String>,
     #[doc = "All input names used by the query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<String>,
     #[doc = "All output names used by the query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<String>,
     #[doc = "All function names used by the query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub functions: Vec<String>,
 }
 impl QueryCompilationResult {
@@ -2410,7 +2503,11 @@ pub struct SampleInputResult {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<SampleInputResultStatus>,
     #[doc = "Diagnostics messages. E.g. message indicating some partitions from the input have no data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub diagnostics: Vec<String>,
     #[doc = "A SAS URL to download the sampled input data."]
     #[serde(rename = "eventsDownloadUrl", default, skip_serializing_if = "Option::is_none")]
@@ -2533,7 +2630,12 @@ pub struct ServiceBusQueueOutputDataSourceProperties {
     #[serde(rename = "queueName", default, skip_serializing_if = "Option::is_none")]
     pub queue_name: Option<String>,
     #[doc = "A string array of the names of output columns to be attached to Service Bus messages as custom properties."]
-    #[serde(rename = "propertyColumns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyColumns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_columns: Vec<String>,
     #[serde(rename = "systemPropertyColumns", default, skip_serializing_if = "Option::is_none")]
     pub system_property_columns: Option<serde_json::Value>,
@@ -2569,7 +2671,12 @@ pub struct ServiceBusTopicOutputDataSourceProperties {
     #[serde(rename = "topicName", default, skip_serializing_if = "Option::is_none")]
     pub topic_name: Option<String>,
     #[doc = "A string array of the names of output columns to be attached to Service Bus messages as custom properties."]
-    #[serde(rename = "propertyColumns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyColumns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_columns: Vec<String>,
     #[serde(rename = "systemPropertyColumns", default, skip_serializing_if = "Option::is_none")]
     pub system_property_columns: Option<serde_json::Value>,
@@ -2659,7 +2766,11 @@ impl StreamingJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingJobListResult {
     #[doc = "A list of streaming jobs. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingJob>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2725,16 +2836,28 @@ pub struct StreamingJobProperties {
     #[serde(rename = "createdDate", default, with = "azure_core::date::rfc3339::option")]
     pub created_date: Option<time::OffsetDateTime>,
     #[doc = "A list of one or more inputs to the streaming job. The name property for each input is required when specifying this property in a PUT request. This property cannot be modify via a PATCH operation. You must use the PATCH API available for the individual input."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<Input>,
     #[doc = "A transformation object, containing all information associated with the named transformation. All transformations are contained under a streaming job."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub transformation: Option<Transformation>,
     #[doc = "A list of one or more outputs for the streaming job. The name property for each output is required when specifying this property in a PUT request. This property cannot be modify via a PATCH operation. You must use the PATCH API available for the individual output."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<Output>,
     #[doc = "A list of one or more functions for the streaming job. The name property for each function is required when specifying this property in a PUT request. This property cannot be modify via a PATCH operation. You must use the PATCH API available for the individual transformation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub functions: Vec<Function>,
     #[doc = "The current entity tag for the streaming job. This is an opaque string. You can use it to detect whether the resource has changed between requests. You can also use it in the If-Match or If-None-Match headers for write operations for optimistic concurrency."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2938,7 +3061,11 @@ pub mod subscription_quota {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionQuotasListResult {
     #[doc = "List of quotas for the subscription in a particular region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionQuota>,
 }
 impl SubscriptionQuotasListResult {
diff --git a/services/mgmt/streamanalytics/src/package_pure_2020_03/models.rs b/services/mgmt/streamanalytics/src/package_pure_2020_03/models.rs
index e793170af0..f47160fa23 100644
--- a/services/mgmt/streamanalytics/src/package_pure_2020_03/models.rs
+++ b/services/mgmt/streamanalytics/src/package_pure_2020_03/models.rs
@@ -200,7 +200,11 @@ pub struct AzureMachineLearningWebServiceFunctionBindingProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub inputs: Option<AzureMachineLearningWebServiceInputs>,
     #[doc = "A list of outputs from the Azure Machine Learning web service endpoint execution."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<AzureMachineLearningWebServiceOutputColumn>,
     #[doc = "Number between 1 and 10000 describing maximum number of rows for every Azure ML RRS execute request. Default is 1000."]
     #[serde(rename = "batchSize", default, skip_serializing_if = "Option::is_none")]
@@ -268,7 +272,12 @@ pub struct AzureMachineLearningWebServiceInputs {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of input columns for the Azure Machine Learning web service endpoint."]
-    #[serde(rename = "columnNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "columnNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub column_names: Vec<AzureMachineLearningWebServiceInputColumn>,
 }
 impl AzureMachineLearningWebServiceInputs {
@@ -493,7 +502,12 @@ pub struct AzureTableOutputDataSourceProperties {
     #[serde(rename = "rowKey", default, skip_serializing_if = "Option::is_none")]
     pub row_key: Option<String>,
     #[doc = "If specified, each item in the array is the name of a column to remove (if present) from output event entities."]
-    #[serde(rename = "columnsToRemove", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "columnsToRemove",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns_to_remove: Vec<String>,
     #[doc = "The number of rows to write to the Azure Table at a time."]
     #[serde(rename = "batchSize", default, skip_serializing_if = "Option::is_none")]
@@ -508,7 +522,12 @@ impl AzureTableOutputDataSourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlobDataSourceProperties {
     #[doc = "A list of one or more Azure Storage accounts. Required on PUT (CreateOrReplace) requests."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<StorageAccount>,
     #[doc = "The name of a container within the associated Storage account. This container contains either the blob(s) to be read from or written to. Required on PUT (CreateOrReplace) requests."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -675,7 +694,11 @@ impl ClusterJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterJobListResult {
     #[doc = "A list of streaming jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClusterJob>,
     #[doc = "The URL to fetch the next set of streaming jobs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -696,7 +719,11 @@ impl ClusterJobListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListResult {
     #[doc = "A list of clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "The URL to fetch the next set of clusters."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -980,7 +1007,11 @@ impl DiagnosticCondition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Diagnostics {
     #[doc = "A collection of zero or more conditions applicable to the resource, or to the job overall, that warrant customer attention."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<DiagnosticCondition>,
 }
 impl Diagnostics {
@@ -1101,7 +1132,11 @@ pub mod error {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "Error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<ErrorDetails>,
     }
     impl Error {
@@ -1183,7 +1218,12 @@ pub struct EventHubOutputDataSourceProperties {
     #[serde(rename = "partitionKey", default, skip_serializing_if = "Option::is_none")]
     pub partition_key: Option<String>,
     #[doc = "The properties associated with this Event Hub output."]
-    #[serde(rename = "propertyColumns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyColumns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_columns: Vec<String>,
 }
 impl EventHubOutputDataSourceProperties {
@@ -1391,7 +1431,11 @@ impl FunctionBinding {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FunctionConfiguration {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<FunctionInput>,
     #[doc = "Describes the output of a function."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1424,7 +1468,11 @@ impl FunctionInput {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FunctionListResult {
     #[doc = "A list of functions under a streaming job. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Function>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1590,7 +1638,11 @@ impl Input {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InputListResult {
     #[doc = "A list of inputs under a streaming job. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Input>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1943,7 +1995,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Stream Analytics operations supported by the Microsoft.StreamAnalytics resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2027,7 +2083,11 @@ impl Serialize for OutputErrorPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OutputListResult {
     #[doc = "A list of outputs under a streaming job. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Output>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2199,7 +2259,11 @@ impl PrivateEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointListResult {
     #[doc = "A list of private endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpoint>,
     #[doc = "The URL to fetch the next set of private endpoints."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2223,7 +2287,12 @@ pub struct PrivateEndpointProperties {
     #[serde(rename = "createdDate", default, skip_serializing_if = "Option::is_none")]
     pub created_date: Option<String>,
     #[doc = "A list of connections to the remote resource. Immutable after it is set."]
-    #[serde(rename = "manualPrivateLinkServiceConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "manualPrivateLinkServiceConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manual_private_link_service_connections: Vec<PrivateLinkServiceConnection>,
 }
 impl PrivateEndpointProperties {
@@ -2268,7 +2337,12 @@ pub struct PrivateLinkServiceConnectionProperties {
     #[serde(rename = "privateLinkServiceId", default, skip_serializing_if = "Option::is_none")]
     pub private_link_service_id: Option<String>,
     #[doc = "The ID(s) of the group(s) obtained from the remote resource that this private endpoint should connect to. Required on PUT (CreateOrUpdate) requests."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "A message passed to the owner of the remote resource with this connection request. Restricted to 140 chars."]
     #[serde(rename = "requestMessage", default, skip_serializing_if = "Option::is_none")]
@@ -2476,7 +2550,12 @@ pub struct ServiceBusQueueOutputDataSourceProperties {
     #[serde(rename = "queueName", default, skip_serializing_if = "Option::is_none")]
     pub queue_name: Option<String>,
     #[doc = "A string array of the names of output columns to be attached to Service Bus messages as custom properties."]
-    #[serde(rename = "propertyColumns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyColumns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_columns: Vec<String>,
     #[doc = "The system properties associated with the Service Bus Queue. The following system properties are supported: ReplyToSessionId, ContentType, To, Subject, CorrelationId, TimeToLive, PartitionKey, SessionId, ScheduledEnqueueTime, MessageId, ReplyTo, Label, ScheduledEnqueueTimeUtc."]
     #[serde(rename = "systemPropertyColumns", default, skip_serializing_if = "Option::is_none")]
@@ -2513,7 +2592,12 @@ pub struct ServiceBusTopicOutputDataSourceProperties {
     #[serde(rename = "topicName", default, skip_serializing_if = "Option::is_none")]
     pub topic_name: Option<String>,
     #[doc = "A string array of the names of output columns to be attached to Service Bus messages as custom properties."]
-    #[serde(rename = "propertyColumns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyColumns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_columns: Vec<String>,
     #[doc = "The system properties associated with the Service Bus Topic Output. The following system properties are supported: ReplyToSessionId, ContentType, To, Subject, CorrelationId, TimeToLive, PartitionKey, SessionId, ScheduledEnqueueTime, MessageId, ReplyTo, Label, ScheduledEnqueueTimeUtc."]
     #[serde(rename = "systemPropertyColumns", default, skip_serializing_if = "Option::is_none")]
@@ -2654,7 +2738,11 @@ impl StreamingJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StreamingJobListResult {
     #[doc = "A list of streaming jobs. Populated by a 'List' operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StreamingJob>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2720,16 +2808,28 @@ pub struct StreamingJobProperties {
     #[serde(rename = "createdDate", default, with = "azure_core::date::rfc3339::option")]
     pub created_date: Option<time::OffsetDateTime>,
     #[doc = "A list of one or more inputs to the streaming job. The name property for each input is required when specifying this property in a PUT request. This property cannot be modify via a PATCH operation. You must use the PATCH API available for the individual input."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<Input>,
     #[doc = "A transformation object, containing all information associated with the named transformation. All transformations are contained under a streaming job."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub transformation: Option<Transformation>,
     #[doc = "A list of one or more outputs for the streaming job. The name property for each output is required when specifying this property in a PUT request. This property cannot be modify via a PATCH operation. You must use the PATCH API available for the individual output."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<Output>,
     #[doc = "A list of one or more functions for the streaming job. The name property for each function is required when specifying this property in a PUT request. This property cannot be modify via a PATCH operation. You must use the PATCH API available for the individual transformation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub functions: Vec<Function>,
     #[doc = "The current entity tag for the streaming job. This is an opaque string. You can use it to detect whether the resource has changed between requests. You can also use it in the If-Match or If-None-Match headers for write operations for optimistic concurrency."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2880,7 +2980,11 @@ pub mod subscription_quota {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionQuotasListResult {
     #[doc = "List of quotas for the subscription in a particular region."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionQuota>,
 }
 impl SubscriptionQuotasListResult {
@@ -2926,7 +3030,12 @@ pub struct TransformationProperties {
     #[serde(rename = "streamingUnits", default, skip_serializing_if = "Option::is_none")]
     pub streaming_units: Option<i32>,
     #[doc = "Specifies the valid streaming units a streaming job can scale to."]
-    #[serde(rename = "validStreamingUnits", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validStreamingUnits",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub valid_streaming_units: Vec<i32>,
     #[doc = "Specifies the query that will be run in the streaming job. You can learn more about the Stream Analytics Query Language (SAQL) here: https://msdn.microsoft.com/library/azure/dn834998 . Required on PUT (CreateOrReplace) requests."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/streamanalytics/src/package_pure_2020_03_preview/models.rs b/services/mgmt/streamanalytics/src/package_pure_2020_03_preview/models.rs
index 23b4827ce6..559c43d1b6 100644
--- a/services/mgmt/streamanalytics/src/package_pure_2020_03_preview/models.rs
+++ b/services/mgmt/streamanalytics/src/package_pure_2020_03_preview/models.rs
@@ -45,7 +45,11 @@ impl ClusterJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterJobListResult {
     #[doc = "A list of streaming jobs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClusterJob>,
     #[doc = "The URL to fetch the next set of streaming jobs."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -66,7 +70,11 @@ impl ClusterJobListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterListResult {
     #[doc = "A list of clusters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "The URL to fetch the next set of clusters."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -234,7 +242,11 @@ pub mod error {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
         #[doc = "Error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<ErrorDetails>,
     }
     impl Error {
@@ -335,7 +347,11 @@ impl PrivateEndpoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointListResult {
     #[doc = "A list of private endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpoint>,
     #[doc = "The URL to fetch the next set of private endpoints."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -359,7 +375,12 @@ pub struct PrivateEndpointProperties {
     #[serde(rename = "createdDate", default, skip_serializing_if = "Option::is_none")]
     pub created_date: Option<String>,
     #[doc = "A list of connections to the remote resource. Immutable after it is set."]
-    #[serde(rename = "manualPrivateLinkServiceConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "manualPrivateLinkServiceConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manual_private_link_service_connections: Vec<PrivateLinkServiceConnection>,
 }
 impl PrivateEndpointProperties {
@@ -404,7 +425,12 @@ pub struct PrivateLinkServiceConnectionProperties {
     #[serde(rename = "privateLinkServiceId", default, skip_serializing_if = "Option::is_none")]
     pub private_link_service_id: Option<String>,
     #[doc = "The ID(s) of the group(s) obtained from the remote resource that this private endpoint should connect to. Required on PUT (CreateOrUpdate) requests."]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "A message passed to the owner of the remote resource with this connection request. Restricted to 140 chars."]
     #[serde(rename = "requestMessage", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/subscription/src/package_2019_03_preview/models.rs b/services/mgmt/subscription/src/package_2019_03_preview/models.rs
index 64b9e7a9dd..7283764490 100644
--- a/services/mgmt/subscription/src/package_2019_03_preview/models.rs
+++ b/services/mgmt/subscription/src/package_2019_03_preview/models.rs
@@ -103,7 +103,11 @@ impl Location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocationListResult {
     #[doc = "An array of locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Location>,
 }
 impl azure_core::Continuable for LocationListResult {
@@ -221,7 +225,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -299,7 +307,11 @@ impl SubscriptionCreationResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionListResult {
     #[doc = "An array of subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Subscription>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -350,7 +362,11 @@ impl SubscriptionOperation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionOperationListResult {
     #[doc = "A list of pending SubscriptionOperations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionOperation>,
 }
 impl SubscriptionOperationListResult {
@@ -405,7 +421,11 @@ impl TenantIdDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct TenantListResult {
     #[doc = "An array of tenants."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TenantIdDescription>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink")]
diff --git a/services/mgmt/subscription/src/package_2019_10_preview/models.rs b/services/mgmt/subscription/src/package_2019_10_preview/models.rs
index 3b0aee0466..4a25c3b32f 100644
--- a/services/mgmt/subscription/src/package_2019_10_preview/models.rs
+++ b/services/mgmt/subscription/src/package_2019_10_preview/models.rs
@@ -97,7 +97,11 @@ impl Location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocationListResult {
     #[doc = "An array of locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Location>,
 }
 impl azure_core::Continuable for LocationListResult {
@@ -207,7 +211,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -222,7 +230,11 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PutAliasListResult {
     #[doc = "The list of alias."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PutAliasResponse>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -449,7 +461,11 @@ pub struct SubscriptionCreationParameters {
     #[serde(rename = "managementGroupId", default, skip_serializing_if = "Option::is_none")]
     pub management_group_id: Option<String>,
     #[doc = "The list of principals that should be granted Owner access on the subscription. Principals should be of type User, Service Principal or Security Group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub owners: Vec<AdPrincipal>,
     #[doc = "The offer type of the subscription. For example, MS-AZR-0017P (EnterpriseAgreement) and MS-AZR-0148P (EnterpriseAgreement devTest) are available. Only valid when creating a subscription in a enrollment account scope."]
     #[serde(rename = "offerType", default, skip_serializing_if = "Option::is_none")]
@@ -521,7 +537,11 @@ impl SubscriptionCreationResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionListResult {
     #[doc = "An array of subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Subscription>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -597,7 +617,11 @@ impl TenantIdDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct TenantListResult {
     #[doc = "An array of tenants."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TenantIdDescription>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink")]
diff --git a/services/mgmt/subscription/src/package_2020_01/models.rs b/services/mgmt/subscription/src/package_2020_01/models.rs
index 119c6770a7..39dfdd7f9b 100644
--- a/services/mgmt/subscription/src/package_2020_01/models.rs
+++ b/services/mgmt/subscription/src/package_2020_01/models.rs
@@ -140,7 +140,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -173,7 +177,11 @@ pub struct SubscriptionCreationParameters {
     #[serde(rename = "managementGroupId", default, skip_serializing_if = "Option::is_none")]
     pub management_group_id: Option<String>,
     #[doc = "The list of principals that should be granted Owner access on the subscription. Principals should be of type User, Service Principal or Security Group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub owners: Vec<AdPrincipal>,
     #[doc = "The offer type of the subscription. For example, MS-AZR-0017P (EnterpriseAgreement) and MS-AZR-0148P (EnterpriseAgreement devTest) are available. Only valid when creating a subscription in a enrollment account scope."]
     #[serde(rename = "offerType", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/subscription/src/package_2020_09/models.rs b/services/mgmt/subscription/src/package_2020_09/models.rs
index 19c265c7dd..3b5eb40ff6 100644
--- a/services/mgmt/subscription/src/package_2020_09/models.rs
+++ b/services/mgmt/subscription/src/package_2020_09/models.rs
@@ -91,7 +91,11 @@ impl Location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocationListResult {
     #[doc = "An array of locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Location>,
 }
 impl azure_core::Continuable for LocationListResult {
@@ -145,7 +149,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -160,7 +168,11 @@ impl OperationListResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PutAliasListResult {
     #[doc = "The list of alias."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PutAliasResponse>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -379,7 +391,11 @@ pub mod subscription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionListResult {
     #[doc = "An array of subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Subscription>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -455,7 +471,11 @@ impl TenantIdDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct TenantListResult {
     #[doc = "An array of tenants."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TenantIdDescription>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink")]
diff --git a/services/mgmt/subscription/src/package_2021_10/models.rs b/services/mgmt/subscription/src/package_2021_10/models.rs
index 8247f83e3f..a116cd320f 100644
--- a/services/mgmt/subscription/src/package_2021_10/models.rs
+++ b/services/mgmt/subscription/src/package_2021_10/models.rs
@@ -134,7 +134,12 @@ impl BillingAccountPoliciesResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BillingAccountPoliciesResponseProperties {
     #[doc = "Service tenant for the billing account."]
-    #[serde(rename = "serviceTenants", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceTenants",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_tenants: Vec<ServiceTenantResponse>,
     #[doc = "Determine if the transfers are allowed for the billing account"]
     #[serde(rename = "allowTransfers", default, skip_serializing_if = "Option::is_none")]
@@ -213,7 +218,11 @@ impl ErrorResponseBody {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GetTenantPolicyListResponse {
     #[doc = "The list of tenant policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GetTenantPolicyResponse>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -285,7 +294,11 @@ impl Location {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LocationListResult {
     #[doc = "An array of locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Location>,
 }
 impl azure_core::Continuable for LocationListResult {
@@ -345,7 +358,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -471,7 +488,12 @@ pub struct PutTenantPolicyRequestProperties {
     #[serde(rename = "blockSubscriptionsIntoTenant", default, skip_serializing_if = "Option::is_none")]
     pub block_subscriptions_into_tenant: Option<bool>,
     #[doc = "List of user objectIds that are exempted from the set subscription tenant policies for the user's tenant."]
-    #[serde(rename = "exemptedPrincipals", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exemptedPrincipals",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exempted_principals: Vec<String>,
 }
 impl PutTenantPolicyRequestProperties {
@@ -549,7 +571,11 @@ pub mod subscription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionAliasListResult {
     #[doc = "The list of alias."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubscriptionAliasResponse>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -675,7 +701,11 @@ pub mod subscription_alias_response_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubscriptionListResult {
     #[doc = "An array of subscriptions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Subscription>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -751,7 +781,11 @@ impl TenantIdDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct TenantListResult {
     #[doc = "An array of tenants."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TenantIdDescription>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink")]
@@ -788,7 +822,12 @@ pub struct TenantPolicy {
     #[serde(rename = "blockSubscriptionsIntoTenant", default, skip_serializing_if = "Option::is_none")]
     pub block_subscriptions_into_tenant: Option<bool>,
     #[doc = "List of user objectIds that are exempted from the set subscription tenant policies for the user's tenant."]
-    #[serde(rename = "exemptedPrincipals", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exemptedPrincipals",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exempted_principals: Vec<String>,
 }
 impl TenantPolicy {
diff --git a/services/mgmt/support/src/package_2019_05_preview/models.rs b/services/mgmt/support/src/package_2019_05_preview/models.rs
index a674820b0f..142f27c045 100644
--- a/services/mgmt/support/src/package_2019_05_preview/models.rs
+++ b/services/mgmt/support/src/package_2019_05_preview/models.rs
@@ -184,7 +184,11 @@ pub mod communication_details_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CommunicationsListResult {
     #[doc = "List of Communication resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CommunicationDetails>,
     #[doc = "The URI to fetch the next page of Communication resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -217,7 +221,12 @@ pub struct ContactProfile {
     #[serde(rename = "primaryEmailAddress")]
     pub primary_email_address: String,
     #[doc = "Additional email addresses listed will be copied on any correspondence about the support ticket."]
-    #[serde(rename = "additionalEmailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalEmailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_email_addresses: Vec<String>,
     #[doc = "Phone number. This is required if preferred contact method is phone."]
     #[serde(rename = "phoneNumber", default, skip_serializing_if = "Option::is_none")]
@@ -357,7 +366,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "The list of operations supported by Microsoft Support resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationsListResult {
@@ -408,7 +421,11 @@ impl ProblemClassificationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProblemClassificationsListResult {
     #[doc = "List of ProblemClassification resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProblemClassification>,
 }
 impl azure_core::Continuable for ProblemClassificationsListResult {
@@ -447,7 +464,12 @@ pub struct QuotaTicketDetails {
     #[serde(rename = "quotaChangeRequestVersion", default, skip_serializing_if = "Option::is_none")]
     pub quota_change_request_version: Option<String>,
     #[doc = "This property is required for providing the region and new quota limits."]
-    #[serde(rename = "quotaChangeRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "quotaChangeRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub quota_change_requests: Vec<QuotaChangeRequest>,
 }
 impl QuotaTicketDetails {
@@ -489,7 +511,11 @@ pub struct ServiceError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The list of error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ServiceErrorDetail>,
 }
 impl ServiceError {
@@ -549,7 +575,11 @@ impl ServiceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServicesListResult {
     #[doc = "List of Service resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Service>,
 }
 impl azure_core::Continuable for ServicesListResult {
@@ -743,7 +773,11 @@ pub mod support_ticket_details_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportTicketsListResult {
     #[doc = "List of SupportTicket resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SupportTicketDetails>,
     #[doc = "The URI to fetch the next page of SupportTicket resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -788,7 +822,12 @@ pub struct UpdateContactProfile {
     #[serde(rename = "primaryEmailAddress", default, skip_serializing_if = "Option::is_none")]
     pub primary_email_address: Option<String>,
     #[doc = "Email addresses listed will be copied on any correspondence about the support ticket"]
-    #[serde(rename = "additionalEmailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalEmailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_email_addresses: Vec<String>,
     #[doc = "Phone number. This is required if preferred contact method is phone."]
     #[serde(rename = "phoneNumber", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/support/src/package_2020_04/models.rs b/services/mgmt/support/src/package_2020_04/models.rs
index 77b00d9270..f4176108d1 100644
--- a/services/mgmt/support/src/package_2020_04/models.rs
+++ b/services/mgmt/support/src/package_2020_04/models.rs
@@ -184,7 +184,11 @@ pub mod communication_details_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CommunicationsListResult {
     #[doc = "List of Communication resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CommunicationDetails>,
     #[doc = "The URI to fetch the next page of Communication resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -217,7 +221,12 @@ pub struct ContactProfile {
     #[serde(rename = "primaryEmailAddress")]
     pub primary_email_address: String,
     #[doc = "Additional email addresses listed will be copied on any correspondence about the support ticket."]
-    #[serde(rename = "additionalEmailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalEmailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_email_addresses: Vec<String>,
     #[doc = "Phone number. This is required if preferred contact method is phone."]
     #[serde(rename = "phoneNumber", default, skip_serializing_if = "Option::is_none")]
@@ -357,7 +366,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "The list of operations supported by Microsoft Support resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationsListResult {
@@ -408,7 +421,11 @@ impl ProblemClassificationProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProblemClassificationsListResult {
     #[doc = "List of ProblemClassification resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProblemClassification>,
 }
 impl azure_core::Continuable for ProblemClassificationsListResult {
@@ -447,7 +464,12 @@ pub struct QuotaTicketDetails {
     #[serde(rename = "quotaChangeRequestVersion", default, skip_serializing_if = "Option::is_none")]
     pub quota_change_request_version: Option<String>,
     #[doc = "This property is required for providing the region and new quota limits."]
-    #[serde(rename = "quotaChangeRequests", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "quotaChangeRequests",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub quota_change_requests: Vec<QuotaChangeRequest>,
 }
 impl QuotaTicketDetails {
@@ -489,7 +511,11 @@ pub struct ServiceError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The list of error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ServiceErrorDetail>,
 }
 impl ServiceError {
@@ -540,7 +566,12 @@ pub struct ServiceProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "ARM Resource types."]
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<String>,
 }
 impl ServiceProperties {
@@ -552,7 +583,11 @@ impl ServiceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServicesListResult {
     #[doc = "List of Service resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Service>,
 }
 impl azure_core::Continuable for ServicesListResult {
@@ -745,7 +780,11 @@ pub mod support_ticket_details_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportTicketsListResult {
     #[doc = "List of SupportTicket resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SupportTicketDetails>,
     #[doc = "The URI to fetch the next page of SupportTicket resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -790,7 +829,12 @@ pub struct UpdateContactProfile {
     #[serde(rename = "primaryEmailAddress", default, skip_serializing_if = "Option::is_none")]
     pub primary_email_address: Option<String>,
     #[doc = "Email addresses listed will be copied on any correspondence about the support ticket."]
-    #[serde(rename = "additionalEmailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalEmailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_email_addresses: Vec<String>,
     #[doc = "Phone number. This is required if preferred contact method is phone."]
     #[serde(rename = "phoneNumber", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/support/src/package_preview_2021_06/models.rs b/services/mgmt/support/src/package_preview_2021_06/models.rs
index c3e16fb30e..70f2576c0c 100644
--- a/services/mgmt/support/src/package_preview_2021_06/models.rs
+++ b/services/mgmt/support/src/package_preview_2021_06/models.rs
@@ -100,7 +100,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsListResult {
     #[doc = "The list of operations supported by Microsoft Support resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationsListResult {
@@ -127,7 +131,11 @@ pub struct ServiceError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The list of error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ServiceErrorDetail>,
 }
 impl ServiceError {
diff --git a/services/mgmt/synapse/src/package_composite_v1/models.rs b/services/mgmt/synapse/src/package_composite_v1/models.rs
index 38ff70dc0e..8094328ee7 100644
--- a/services/mgmt/synapse/src/package_composite_v1/models.rs
+++ b/services/mgmt/synapse/src/package_composite_v1/models.rs
@@ -120,7 +120,11 @@ impl AzureAdOnlyAuthentication {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureAdOnlyAuthenticationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureAdOnlyAuthentication>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -251,7 +255,11 @@ pub struct BigDataPoolResourceInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Big Data pools"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BigDataPoolResourceInfo>,
 }
 impl azure_core::Continuable for BigDataPoolResourceInfoListResult {
@@ -305,7 +313,12 @@ pub struct BigDataPoolResourceProperties {
     #[serde(rename = "libraryRequirements", default, skip_serializing_if = "Option::is_none")]
     pub library_requirements: Option<LibraryRequirements>,
     #[doc = "List of custom libraries/packages associated with the spark pool."]
-    #[serde(rename = "customLibraries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customLibraries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_libraries: Vec<LibraryInfo>,
     #[doc = "SparkConfig Properties for a Big Data pool powered by Apache Spark"]
     #[serde(rename = "sparkConfigProperties", default, skip_serializing_if = "Option::is_none")]
@@ -673,7 +686,11 @@ impl DataMaskingRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataMaskingRuleListResult {
     #[doc = "The list of Sql pool data masking rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataMaskingRule>,
 }
 impl azure_core::Continuable for DataMaskingRuleListResult {
@@ -818,7 +835,11 @@ impl DedicatedSqLminimalTlsSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedSqLminimalTlsSettingsListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DedicatedSqLminimalTlsSettings>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -916,7 +937,11 @@ impl EncryptionProtector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EncryptionProtectorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EncryptionProtector>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1121,10 +1146,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -1168,7 +1202,11 @@ impl ExtendedServerBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtendedServerBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtendedServerBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1203,7 +1241,12 @@ pub struct ExtendedServerBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -1265,7 +1308,11 @@ impl ExtendedSqlPoolBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtendedSqlPoolBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtendedSqlPoolBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1300,7 +1347,12 @@ pub struct ExtendedSqlPoolBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -1368,7 +1420,11 @@ impl GeoBackupPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GeoBackupPolicyListResult {
     #[doc = "The list of geo backup policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GeoBackupPolicy>,
 }
 impl azure_core::Continuable for GeoBackupPolicyListResult {
@@ -1661,7 +1717,11 @@ pub struct IntegrationRuntimeMonitoringData {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Integration runtime node monitoring data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<IntegrationRuntimeNodeMonitoringData>,
 }
 impl IntegrationRuntimeMonitoringData {
@@ -1721,7 +1781,11 @@ pub struct IntegrationRuntimeOutboundNetworkDependenciesCategoryEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints for outbound network dependency."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<IntegrationRuntimeOutboundNetworkDependenciesEndpoint>,
 }
 impl IntegrationRuntimeOutboundNetworkDependenciesCategoryEndpoint {
@@ -1736,7 +1800,12 @@ pub struct IntegrationRuntimeOutboundNetworkDependenciesEndpoint {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The details of endpoint."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<IntegrationRuntimeOutboundNetworkDependenciesEndpointDetails>,
 }
 impl IntegrationRuntimeOutboundNetworkDependenciesEndpoint {
@@ -1760,7 +1829,11 @@ impl IntegrationRuntimeOutboundNetworkDependenciesEndpointDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationRuntimeOutboundNetworkDependenciesEndpointsResponse {
     #[doc = "The list of outbound network dependency endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationRuntimeOutboundNetworkDependenciesCategoryEndpoint>,
 }
 impl IntegrationRuntimeOutboundNetworkDependenciesEndpointsResponse {
@@ -1923,7 +1996,12 @@ pub struct IntegrationRuntimeSsisProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub edition: Option<integration_runtime_ssis_properties::Edition>,
     #[doc = "Custom setup without script properties for a SSIS integration runtime."]
-    #[serde(rename = "expressCustomSetupProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "expressCustomSetupProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub express_custom_setup_properties: Vec<CustomSetupBase>,
 }
 impl IntegrationRuntimeSsisProperties {
@@ -2144,7 +2222,12 @@ pub struct IntegrationRuntimeVNetProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub subnet: Option<String>,
     #[doc = "Resource IDs of the public IP addresses that this integration runtime will use."]
-    #[serde(rename = "publicIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_i_ps: Vec<String>,
     #[doc = "The ID of subnet, to which this Azure-SSIS integration runtime will be joined."]
     #[serde(rename = "subnetId", default, skip_serializing_if = "Option::is_none")]
@@ -2176,7 +2259,11 @@ pub struct IpFirewallRuleInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of IP firewall rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IpFirewallRuleInfo>,
 }
 impl azure_core::Continuable for IpFirewallRuleInfoListResult {
@@ -2290,7 +2377,11 @@ pub struct KeyInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Key>,
 }
 impl azure_core::Continuable for KeyInfoListResult {
@@ -2494,7 +2585,11 @@ impl LinkedIntegrationRuntimeType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListSqlPoolSecurityAlertPolicies {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2532,7 +2627,12 @@ pub struct MaintenanceWindowOptionsProperties {
     #[serde(rename = "isEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_enabled: Option<bool>,
     #[doc = "Available maintenance cycles e.g. {Saturday, 0, 48*60}, {Wednesday, 0, 24*60}."]
-    #[serde(rename = "maintenanceWindowCycles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "maintenanceWindowCycles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub maintenance_window_cycles: Vec<MaintenanceWindowTimeRange>,
     #[doc = "Minimum duration of maintenance window."]
     #[serde(rename = "minDurationInMinutes", default, skip_serializing_if = "Option::is_none")]
@@ -2644,7 +2744,12 @@ impl MaintenanceWindows {
 #[doc = "Maintenance windows resource properties."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MaintenanceWindowsProperties {
-    #[serde(rename = "timeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_ranges: Vec<MaintenanceWindowTimeRange>,
 }
 impl MaintenanceWindowsProperties {
@@ -2784,7 +2889,11 @@ pub struct ManagedIntegrationRuntimeError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "Managed integration runtime error parameters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<String>,
     #[doc = "Error message."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2823,7 +2932,11 @@ pub struct ManagedIntegrationRuntimeNode {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<managed_integration_runtime_node::Status>,
     #[doc = "The errors that occurred on this integration runtime node."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ManagedIntegrationRuntimeError>,
 }
 impl ManagedIntegrationRuntimeNode {
@@ -2891,7 +3004,11 @@ pub struct ManagedIntegrationRuntimeOperationResult {
     #[serde(rename = "errorCode", default, skip_serializing_if = "Option::is_none")]
     pub error_code: Option<String>,
     #[doc = "Managed integration runtime error parameters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<String>,
     #[doc = "The activity id for the operation request."]
     #[serde(rename = "activityId", default, skip_serializing_if = "Option::is_none")]
@@ -2929,10 +3046,19 @@ pub struct ManagedIntegrationRuntimeStatusTypeProperties {
     #[serde(rename = "createTime", default, with = "azure_core::date::rfc3339::option")]
     pub create_time: Option<time::OffsetDateTime>,
     #[doc = "The list of nodes for managed integration runtime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<ManagedIntegrationRuntimeNode>,
     #[doc = "The errors that occurred on this integration runtime."]
-    #[serde(rename = "otherErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "otherErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub other_errors: Vec<ManagedIntegrationRuntimeError>,
     #[doc = "Properties of managed integration runtime operation result."]
     #[serde(rename = "lastOperation", default, skip_serializing_if = "Option::is_none")]
@@ -2968,7 +3094,12 @@ pub struct ManagedVirtualNetworkSettings {
     #[serde(rename = "linkedAccessCheckOnTargetResource", default, skip_serializing_if = "Option::is_none")]
     pub linked_access_check_on_target_resource: Option<bool>,
     #[doc = "Allowed Aad Tenant Ids For Linking"]
-    #[serde(rename = "allowedAadTenantIdsForLinking", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAadTenantIdsForLinking",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_aad_tenant_ids_for_linking: Vec<String>,
 }
 impl ManagedVirtualNetworkSettings {
@@ -3072,7 +3203,11 @@ pub struct OperationMetaMetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Metric dimensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<OperationMetaMetricDimensionSpecification>,
     #[doc = "Whether the metric supports instance-level aggregation"]
     #[serde(rename = "supportsInstanceLevelAggregation", default, skip_serializing_if = "Option::is_none")]
@@ -3102,10 +3237,20 @@ impl OperationMetaPropertyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationMetaServiceSpecification {
     #[doc = "Service metric specifications"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetaMetricSpecification>,
     #[doc = "Service log specifications"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationMetaLogSpecification>,
 }
 impl OperationMetaServiceSpecification {
@@ -3247,7 +3392,11 @@ impl PrivateEndpointConnectionForPrivateLinkHubBasic {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionForPrivateLinkHubResourceCollectionResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnectionForPrivateLinkHub>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -3267,7 +3416,11 @@ impl PrivateEndpointConnectionForPrivateLinkHubResourceCollectionResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionList {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3326,7 +3479,11 @@ pub struct PrivateLinkHubInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of privateLinkHubs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkHub>,
 }
 impl azure_core::Continuable for PrivateLinkHubInfoListResult {
@@ -3359,7 +3516,12 @@ pub struct PrivateLinkHubProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "List of private endpoint connections"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionForPrivateLinkHubBasic>,
 }
 impl PrivateLinkHubProperties {
@@ -3385,7 +3547,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3409,10 +3575,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -3471,7 +3647,11 @@ pub struct QueryInterval {
     #[serde(rename = "executionCount", default, skip_serializing_if = "Option::is_none")]
     pub execution_count: Option<f64>,
     #[doc = "The list of query metrics during this interval."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<QueryMetric>,
 }
 impl QueryInterval {
@@ -3520,7 +3700,11 @@ pub struct QueryStatistic {
     #[serde(rename = "queryId", default, skip_serializing_if = "Option::is_none")]
     pub query_id: Option<String>,
     #[doc = "The list of query intervals."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub intervals: Vec<QueryInterval>,
 }
 impl QueryStatistic {
@@ -3545,7 +3729,11 @@ impl RecommendedSensitivityLabelUpdate {
 #[doc = "A list of recommended sensitivity label update operations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecommendedSensitivityLabelUpdateList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<RecommendedSensitivityLabelUpdate>,
 }
 impl RecommendedSensitivityLabelUpdateList {
@@ -3597,7 +3785,11 @@ impl RecoverableSqlPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoverableSqlPoolListResult {
     #[doc = "A list of recoverable sql pool"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoverableSqlPool>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3683,7 +3875,11 @@ impl ReplicationLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationLinkListResult {
     #[doc = "The list of Sql pool replication links housed in the Sql pool."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationLink>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3922,7 +4118,11 @@ impl RestorePoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorePoint>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4002,10 +4202,20 @@ pub struct SecurityAlertPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled or a policy has not been applied yet on the specific Sql pool."]
     pub state: security_alert_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly, Data_Exfiltration, Unsafe_Action"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -4259,7 +4469,11 @@ pub struct SelfHostedIntegrationRuntimeStatusTypeProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "The list of nodes for this integration runtime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<SelfHostedIntegrationRuntimeNode>,
     #[doc = "The date at which the integration runtime will be scheduled to update, in ISO8601 format."]
     #[serde(rename = "scheduledUpdateDate", default, with = "azure_core::date::rfc3339::option")]
@@ -4274,7 +4488,12 @@ pub struct SelfHostedIntegrationRuntimeStatusTypeProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capabilities: Option<serde_json::Value>,
     #[doc = "The URLs for the services used in integration runtime backend service."]
-    #[serde(rename = "serviceUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_urls: Vec<String>,
     #[doc = "The state of integration runtime auto update."]
     #[serde(rename = "autoUpdate", default, skip_serializing_if = "Option::is_none")]
@@ -4283,7 +4502,11 @@ pub struct SelfHostedIntegrationRuntimeStatusTypeProperties {
     #[serde(rename = "versionStatus", default, skip_serializing_if = "Option::is_none")]
     pub version_status: Option<String>,
     #[doc = "The list of linked integration runtimes that are created to share with this integration runtime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<LinkedIntegrationRuntime>,
     #[doc = "The version that the integration runtime is going to update to."]
     #[serde(rename = "pushedVersion", default, skip_serializing_if = "Option::is_none")]
@@ -4298,7 +4521,12 @@ pub struct SelfHostedIntegrationRuntimeStatusTypeProperties {
     #[serde(rename = "serviceRegion", default, skip_serializing_if = "Option::is_none")]
     pub service_region: Option<String>,
     #[doc = "The newer versions on download center."]
-    #[serde(rename = "newerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "newerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub newer_versions: Vec<String>,
 }
 impl SelfHostedIntegrationRuntimeStatusTypeProperties {
@@ -4381,7 +4609,11 @@ impl SensitivityLabel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SensitivityLabelListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SensitivityLabel>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4461,7 +4693,11 @@ impl SensitivityLabelUpdate {
 #[doc = "A list of sensitivity label update operations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SensitivityLabelUpdateList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<SensitivityLabelUpdate>,
 }
 impl SensitivityLabelUpdateList {
@@ -4522,7 +4758,11 @@ impl ServerBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4554,7 +4794,12 @@ pub struct ServerBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -4615,7 +4860,11 @@ impl ServerSecurityAlertPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4638,10 +4887,20 @@ pub struct ServerSecurityAlertPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled or a policy has not been applied yet on the specific server"]
     pub state: server_security_alert_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly, Data_Exfiltration, Unsafe_Action"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -4751,7 +5010,11 @@ impl ServerVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4882,7 +5145,11 @@ pub struct SparkConfigurationInfo {
     #[doc = "SparkConfiguration configs."]
     pub configs: serde_json::Value,
     #[doc = "Annotations for SparkConfiguration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub annotations: Vec<String>,
     #[doc = "additional Notes."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4988,7 +5255,11 @@ impl SqlPoolBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5020,7 +5291,12 @@ pub struct SqlPoolBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -5059,7 +5335,11 @@ pub mod sql_pool_blob_auditing_policy_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolBlobAuditingPolicySqlPoolOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5094,7 +5374,11 @@ impl SqlPoolColumn {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolColumnListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolColumn>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5321,7 +5605,11 @@ pub struct SqlPoolInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of SQL pools"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPool>,
 }
 impl azure_core::Continuable for SqlPoolInfoListResult {
@@ -5614,7 +5902,11 @@ impl SqlPoolSchema {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolSchemaListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolSchema>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5660,7 +5952,11 @@ impl SqlPoolTable {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolTableListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolTable>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5745,7 +6041,11 @@ impl SqlPoolVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5855,7 +6155,11 @@ pub struct SsisEnvironment {
     #[serde(rename = "folderId", default, skip_serializing_if = "Option::is_none")]
     pub folder_id: Option<i64>,
     #[doc = "Variable in environment"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub variables: Vec<SsisVariable>,
 }
 impl SsisEnvironment {
@@ -5929,7 +6233,11 @@ impl SsisObjectMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SsisObjectMetadataListResponse {
     #[doc = "List of SSIS object metadata."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SsisObjectMetadata>,
     #[doc = "The link to the next page of results, if any remaining results exist."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6017,7 +6325,11 @@ pub struct SsisPackage {
     #[serde(rename = "projectId", default, skip_serializing_if = "Option::is_none")]
     pub project_id: Option<i64>,
     #[doc = "Parameters in package"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<SsisParameter>,
 }
 impl SsisPackage {
@@ -6088,10 +6400,19 @@ pub struct SsisProject {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<i64>,
     #[doc = "Environment reference in project"]
-    #[serde(rename = "environmentRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_refs: Vec<SsisEnvironmentReference>,
     #[doc = "Parameters in project"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<SsisParameter>,
 }
 impl SsisProject {
@@ -6171,7 +6492,11 @@ pub struct TopQueries {
     #[serde(rename = "observedMetric", default, skip_serializing_if = "Option::is_none")]
     pub observed_metric: Option<top_queries::ObservedMetric>,
     #[doc = "The list of queries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub queries: Vec<QueryStatistic>,
 }
 impl TopQueries {
@@ -6274,7 +6599,11 @@ impl TransparentDataEncryption {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransparentDataEncryptionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TransparentDataEncryption>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6384,7 +6713,11 @@ pub struct VulnerabilityAssessmentRecurringScansProperties {
     #[serde(rename = "emailSubscriptionAdmins", default, skip_serializing_if = "Option::is_none")]
     pub email_subscription_admins: Option<bool>,
     #[doc = "Specifies an array of e-mail addresses to which the scan notification is sent."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
 }
 impl VulnerabilityAssessmentRecurringScansProperties {
@@ -6425,7 +6758,11 @@ impl VulnerabilityAssessmentScanRecord {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VulnerabilityAssessmentScanRecordListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VulnerabilityAssessmentScanRecord>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6461,7 +6798,11 @@ pub struct VulnerabilityAssessmentScanRecordProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The scan errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<VulnerabilityAssessmentScanError>,
     #[doc = "The scan results storage container path."]
     #[serde(rename = "storageContainerPath", default, skip_serializing_if = "Option::is_none")]
@@ -6574,7 +6915,11 @@ impl WorkloadClassifier {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadClassifierListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadClassifier>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6643,7 +6988,11 @@ impl WorkloadGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6736,7 +7085,11 @@ pub struct WorkspaceInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of workspaces"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
 }
 impl azure_core::Continuable for WorkspaceInfoListResult {
@@ -6881,7 +7234,12 @@ pub struct WorkspaceProperties {
     #[serde(rename = "managedVirtualNetwork", default, skip_serializing_if = "Option::is_none")]
     pub managed_virtual_network: Option<String>,
     #[doc = "Private endpoint connections to the workspace"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Details of the encryption associated with the workspace"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/synapse/src/package_composite_v2/models.rs b/services/mgmt/synapse/src/package_composite_v2/models.rs
index a88d31dcc2..9bfa35c1cf 100644
--- a/services/mgmt/synapse/src/package_composite_v2/models.rs
+++ b/services/mgmt/synapse/src/package_composite_v2/models.rs
@@ -48,7 +48,11 @@ impl AttachedDatabaseConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AttachedDatabaseConfigurationListResult {
     #[doc = "The list of attached database configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AttachedDatabaseConfiguration>,
 }
 impl azure_core::Continuable for AttachedDatabaseConfigurationListResult {
@@ -75,7 +79,12 @@ pub struct AttachedDatabaseConfigurationProperties {
     #[serde(rename = "clusterResourceId")]
     pub cluster_resource_id: String,
     #[doc = "The list of databases from the clusterResourceId which are currently attached to the kusto pool."]
-    #[serde(rename = "attachedDatabaseNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "attachedDatabaseNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub attached_database_names: Vec<String>,
     #[doc = "The default principals modification kind"]
     #[serde(rename = "defaultPrincipalsModificationKind")]
@@ -238,7 +247,11 @@ impl AzureAdOnlyAuthentication {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureAdOnlyAuthenticationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureAdOnlyAuthentication>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -559,7 +572,11 @@ pub struct BigDataPoolResourceInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Big Data pools"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BigDataPoolResourceInfo>,
 }
 impl azure_core::Continuable for BigDataPoolResourceInfoListResult {
@@ -613,7 +630,12 @@ pub struct BigDataPoolResourceProperties {
     #[serde(rename = "libraryRequirements", default, skip_serializing_if = "Option::is_none")]
     pub library_requirements: Option<LibraryRequirements>,
     #[doc = "List of custom libraries/packages associated with the spark pool."]
-    #[serde(rename = "customLibraries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customLibraries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_libraries: Vec<LibraryInfo>,
     #[doc = "SparkConfig Properties for a Big Data pool powered by Apache Spark"]
     #[serde(rename = "sparkConfigProperties", default, skip_serializing_if = "Option::is_none")]
@@ -918,7 +940,11 @@ pub mod cluster_principal_assignment_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterPrincipalAssignmentListResult {
     #[doc = "The list of Kusto cluster principal assignments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClusterPrincipalAssignment>,
 }
 impl azure_core::Continuable for ClusterPrincipalAssignmentListResult {
@@ -1295,7 +1321,11 @@ pub mod data_connection_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataConnectionListResult {
     #[doc = "The list of Kusto data connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataConnection>,
 }
 impl azure_core::Continuable for DataConnectionListResult {
@@ -1328,7 +1358,11 @@ impl DataConnectionValidation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataConnectionValidationListResult {
     #[doc = "The list of Kusto data connection validation errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataConnectionValidationResult>,
 }
 impl DataConnectionValidationListResult {
@@ -1450,7 +1484,11 @@ impl DataMaskingRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataMaskingRuleListResult {
     #[doc = "The list of Sql pool data masking rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataMaskingRule>,
 }
 impl azure_core::Continuable for DataMaskingRuleListResult {
@@ -1667,7 +1705,11 @@ pub mod database_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of Kusto databases."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
 }
 impl azure_core::Continuable for DatabaseListResult {
@@ -1725,7 +1767,11 @@ pub mod database_principal_assignment_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabasePrincipalAssignmentListResult {
     #[doc = "The list of Kusto database principal assignments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabasePrincipalAssignment>,
 }
 impl azure_core::Continuable for DatabasePrincipalAssignmentListResult {
@@ -1904,7 +1950,11 @@ impl DedicatedSqLminimalTlsSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedSqLminimalTlsSettingsListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DedicatedSqLminimalTlsSettings>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2002,7 +2052,11 @@ impl EncryptionProtector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EncryptionProtectorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EncryptionProtector>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2207,10 +2261,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -2399,7 +2462,12 @@ pub struct EventHubConnectionProperties {
     #[serde(rename = "dataFormat", default, skip_serializing_if = "Option::is_none")]
     pub data_format: Option<EventHubDataFormat>,
     #[doc = "System properties of the event hub"]
-    #[serde(rename = "eventSystemProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eventSystemProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub event_system_properties: Vec<String>,
     #[doc = "The compression type"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2542,7 +2610,11 @@ impl ExtendedServerBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtendedServerBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtendedServerBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2577,7 +2649,12 @@ pub struct ExtendedServerBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -2639,7 +2716,11 @@ impl ExtendedSqlPoolBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtendedSqlPoolBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtendedSqlPoolBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2674,7 +2755,12 @@ pub struct ExtendedSqlPoolBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -2740,7 +2826,11 @@ impl FollowerDatabaseDefinition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FollowerDatabaseListResult {
     #[doc = "The list of follower database result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FollowerDatabaseDefinition>,
 }
 impl azure_core::Continuable for FollowerDatabaseListResult {
@@ -2782,7 +2872,11 @@ impl GeoBackupPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GeoBackupPolicyListResult {
     #[doc = "The list of geo backup policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GeoBackupPolicy>,
 }
 impl azure_core::Continuable for GeoBackupPolicyListResult {
@@ -3075,7 +3169,11 @@ pub struct IntegrationRuntimeMonitoringData {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Integration runtime node monitoring data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<IntegrationRuntimeNodeMonitoringData>,
 }
 impl IntegrationRuntimeMonitoringData {
@@ -3135,7 +3233,11 @@ pub struct IntegrationRuntimeOutboundNetworkDependenciesCategoryEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints for outbound network dependency."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<IntegrationRuntimeOutboundNetworkDependenciesEndpoint>,
 }
 impl IntegrationRuntimeOutboundNetworkDependenciesCategoryEndpoint {
@@ -3150,7 +3252,12 @@ pub struct IntegrationRuntimeOutboundNetworkDependenciesEndpoint {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The details of endpoint."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<IntegrationRuntimeOutboundNetworkDependenciesEndpointDetails>,
 }
 impl IntegrationRuntimeOutboundNetworkDependenciesEndpoint {
@@ -3174,7 +3281,11 @@ impl IntegrationRuntimeOutboundNetworkDependenciesEndpointDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationRuntimeOutboundNetworkDependenciesEndpointsResponse {
     #[doc = "The list of outbound network dependency endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationRuntimeOutboundNetworkDependenciesCategoryEndpoint>,
 }
 impl IntegrationRuntimeOutboundNetworkDependenciesEndpointsResponse {
@@ -3337,7 +3448,12 @@ pub struct IntegrationRuntimeSsisProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub edition: Option<integration_runtime_ssis_properties::Edition>,
     #[doc = "Custom setup without script properties for a SSIS integration runtime."]
-    #[serde(rename = "expressCustomSetupProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "expressCustomSetupProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub express_custom_setup_properties: Vec<CustomSetupBase>,
 }
 impl IntegrationRuntimeSsisProperties {
@@ -3558,7 +3674,12 @@ pub struct IntegrationRuntimeVNetProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub subnet: Option<String>,
     #[doc = "Resource IDs of the public IP addresses that this integration runtime will use."]
-    #[serde(rename = "publicIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_i_ps: Vec<String>,
     #[doc = "The ID of subnet, to which this Azure-SSIS integration runtime will be joined."]
     #[serde(rename = "subnetId", default, skip_serializing_if = "Option::is_none")]
@@ -3588,7 +3709,12 @@ pub struct IotHubConnectionProperties {
     #[serde(rename = "dataFormat", default, skip_serializing_if = "Option::is_none")]
     pub data_format: Option<IotHubDataFormat>,
     #[doc = "System properties of the iot hub"]
-    #[serde(rename = "eventSystemProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eventSystemProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub event_system_properties: Vec<String>,
     #[doc = "The name of the share access policy"]
     #[serde(rename = "sharedAccessPolicyName")]
@@ -3730,7 +3856,11 @@ pub struct IpFirewallRuleInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of IP firewall rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IpFirewallRuleInfo>,
 }
 impl azure_core::Continuable for IpFirewallRuleInfoListResult {
@@ -3844,7 +3974,11 @@ pub struct KeyInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Key>,
 }
 impl azure_core::Continuable for KeyInfoListResult {
@@ -3928,7 +4062,11 @@ pub mod kusto_pool_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KustoPoolListResult {
     #[doc = "The list of Kusto pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KustoPool>,
 }
 impl KustoPoolListResult {
@@ -4103,7 +4241,11 @@ impl Serialize for LanguageExtensionName {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LanguageExtensionsList {
     #[doc = "The list of language extensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LanguageExtension>,
 }
 impl azure_core::Continuable for LanguageExtensionsList {
@@ -4292,7 +4434,11 @@ impl LinkedIntegrationRuntimeType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListResourceSkusResult {
     #[doc = "The collection of available SKUs for an existing resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureResourceSku>,
 }
 impl azure_core::Continuable for ListResourceSkusResult {
@@ -4310,7 +4456,11 @@ impl ListResourceSkusResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListSqlPoolSecurityAlertPolicies {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4348,7 +4498,12 @@ pub struct MaintenanceWindowOptionsProperties {
     #[serde(rename = "isEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_enabled: Option<bool>,
     #[doc = "Available maintenance cycles e.g. {Saturday, 0, 48*60}, {Wednesday, 0, 24*60}."]
-    #[serde(rename = "maintenanceWindowCycles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "maintenanceWindowCycles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub maintenance_window_cycles: Vec<MaintenanceWindowTimeRange>,
     #[doc = "Minimum duration of maintenance window."]
     #[serde(rename = "minDurationInMinutes", default, skip_serializing_if = "Option::is_none")]
@@ -4460,7 +4615,12 @@ impl MaintenanceWindows {
 #[doc = "Maintenance windows resource properties."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MaintenanceWindowsProperties {
-    #[serde(rename = "timeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_ranges: Vec<MaintenanceWindowTimeRange>,
 }
 impl MaintenanceWindowsProperties {
@@ -4600,7 +4760,11 @@ pub struct ManagedIntegrationRuntimeError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "Managed integration runtime error parameters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<String>,
     #[doc = "Error message."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4639,7 +4803,11 @@ pub struct ManagedIntegrationRuntimeNode {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<managed_integration_runtime_node::Status>,
     #[doc = "The errors that occurred on this integration runtime node."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ManagedIntegrationRuntimeError>,
 }
 impl ManagedIntegrationRuntimeNode {
@@ -4707,7 +4875,11 @@ pub struct ManagedIntegrationRuntimeOperationResult {
     #[serde(rename = "errorCode", default, skip_serializing_if = "Option::is_none")]
     pub error_code: Option<String>,
     #[doc = "Managed integration runtime error parameters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<String>,
     #[doc = "The activity id for the operation request."]
     #[serde(rename = "activityId", default, skip_serializing_if = "Option::is_none")]
@@ -4745,10 +4917,19 @@ pub struct ManagedIntegrationRuntimeStatusTypeProperties {
     #[serde(rename = "createTime", default, with = "azure_core::date::rfc3339::option")]
     pub create_time: Option<time::OffsetDateTime>,
     #[doc = "The list of nodes for managed integration runtime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<ManagedIntegrationRuntimeNode>,
     #[doc = "The errors that occurred on this integration runtime."]
-    #[serde(rename = "otherErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "otherErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub other_errors: Vec<ManagedIntegrationRuntimeError>,
     #[doc = "Properties of managed integration runtime operation result."]
     #[serde(rename = "lastOperation", default, skip_serializing_if = "Option::is_none")]
@@ -4784,7 +4965,12 @@ pub struct ManagedVirtualNetworkSettings {
     #[serde(rename = "linkedAccessCheckOnTargetResource", default, skip_serializing_if = "Option::is_none")]
     pub linked_access_check_on_target_resource: Option<bool>,
     #[doc = "Allowed Aad Tenant Ids For Linking"]
-    #[serde(rename = "allowedAadTenantIdsForLinking", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAadTenantIdsForLinking",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_aad_tenant_ids_for_linking: Vec<String>,
 }
 impl ManagedVirtualNetworkSettings {
@@ -4863,7 +5049,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -4943,7 +5133,11 @@ pub struct OperationMetaMetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Metric dimensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<OperationMetaMetricDimensionSpecification>,
     #[doc = "Whether the metric supports instance-level aggregation"]
     #[serde(rename = "supportsInstanceLevelAggregation", default, skip_serializing_if = "Option::is_none")]
@@ -4973,10 +5167,20 @@ impl OperationMetaPropertyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationMetaServiceSpecification {
     #[doc = "Service metric specifications"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetaMetricSpecification>,
     #[doc = "Service log specifications"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationMetaLogSpecification>,
 }
 impl OperationMetaServiceSpecification {
@@ -5141,7 +5345,11 @@ impl PrivateEndpointConnectionForPrivateLinkHubBasic {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionForPrivateLinkHubResourceCollectionResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnectionForPrivateLinkHub>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -5161,7 +5369,11 @@ impl PrivateEndpointConnectionForPrivateLinkHubResourceCollectionResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionList {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5220,7 +5432,11 @@ pub struct PrivateLinkHubInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of privateLinkHubs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkHub>,
 }
 impl azure_core::Continuable for PrivateLinkHubInfoListResult {
@@ -5253,7 +5469,12 @@ pub struct PrivateLinkHubProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "List of private endpoint connections"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionForPrivateLinkHubBasic>,
 }
 impl PrivateLinkHubProperties {
@@ -5279,7 +5500,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5303,10 +5528,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -5365,7 +5600,11 @@ pub struct QueryInterval {
     #[serde(rename = "executionCount", default, skip_serializing_if = "Option::is_none")]
     pub execution_count: Option<f64>,
     #[doc = "The list of query metrics during this interval."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<QueryMetric>,
 }
 impl QueryInterval {
@@ -5414,7 +5653,11 @@ pub struct QueryStatistic {
     #[serde(rename = "queryId", default, skip_serializing_if = "Option::is_none")]
     pub query_id: Option<String>,
     #[doc = "The list of query intervals."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub intervals: Vec<QueryInterval>,
 }
 impl QueryStatistic {
@@ -5569,7 +5812,11 @@ impl RecommendedSensitivityLabelUpdate {
 #[doc = "A list of recommended sensitivity label update operations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecommendedSensitivityLabelUpdateList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<RecommendedSensitivityLabelUpdate>,
 }
 impl RecommendedSensitivityLabelUpdateList {
@@ -5621,7 +5868,11 @@ impl RecoverableSqlPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoverableSqlPoolListResult {
     #[doc = "A list of recoverable sql pool"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoverableSqlPool>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5707,7 +5958,11 @@ impl ReplicationLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationLinkListResult {
     #[doc = "The list of Sql pool replication links housed in the Sql pool."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationLink>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5993,7 +6248,11 @@ impl RestorePoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorePoint>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6073,10 +6332,20 @@ pub struct SecurityAlertPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled or a policy has not been applied yet on the specific Sql pool."]
     pub state: security_alert_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly, Data_Exfiltration, Unsafe_Action"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -6330,7 +6599,11 @@ pub struct SelfHostedIntegrationRuntimeStatusTypeProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "The list of nodes for this integration runtime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<SelfHostedIntegrationRuntimeNode>,
     #[doc = "The date at which the integration runtime will be scheduled to update, in ISO8601 format."]
     #[serde(rename = "scheduledUpdateDate", default, with = "azure_core::date::rfc3339::option")]
@@ -6345,7 +6618,12 @@ pub struct SelfHostedIntegrationRuntimeStatusTypeProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capabilities: Option<serde_json::Value>,
     #[doc = "The URLs for the services used in integration runtime backend service."]
-    #[serde(rename = "serviceUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_urls: Vec<String>,
     #[doc = "The state of integration runtime auto update."]
     #[serde(rename = "autoUpdate", default, skip_serializing_if = "Option::is_none")]
@@ -6354,7 +6632,11 @@ pub struct SelfHostedIntegrationRuntimeStatusTypeProperties {
     #[serde(rename = "versionStatus", default, skip_serializing_if = "Option::is_none")]
     pub version_status: Option<String>,
     #[doc = "The list of linked integration runtimes that are created to share with this integration runtime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<LinkedIntegrationRuntime>,
     #[doc = "The version that the integration runtime is going to update to."]
     #[serde(rename = "pushedVersion", default, skip_serializing_if = "Option::is_none")]
@@ -6369,7 +6651,12 @@ pub struct SelfHostedIntegrationRuntimeStatusTypeProperties {
     #[serde(rename = "serviceRegion", default, skip_serializing_if = "Option::is_none")]
     pub service_region: Option<String>,
     #[doc = "The newer versions on download center."]
-    #[serde(rename = "newerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "newerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub newer_versions: Vec<String>,
 }
 impl SelfHostedIntegrationRuntimeStatusTypeProperties {
@@ -6452,7 +6739,11 @@ impl SensitivityLabel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SensitivityLabelListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SensitivityLabel>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6532,7 +6823,11 @@ impl SensitivityLabelUpdate {
 #[doc = "A list of sensitivity label update operations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SensitivityLabelUpdateList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<SensitivityLabelUpdate>,
 }
 impl SensitivityLabelUpdateList {
@@ -6593,7 +6888,11 @@ impl ServerBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6625,7 +6924,12 @@ pub struct ServerBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -6686,7 +6990,11 @@ impl ServerSecurityAlertPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6709,10 +7017,20 @@ pub struct ServerSecurityAlertPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled or a policy has not been applied yet on the specific server"]
     pub state: server_security_alert_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly, Data_Exfiltration, Unsafe_Action"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -6822,7 +7140,11 @@ impl ServerVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6896,13 +7218,26 @@ pub struct SkuDescription {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub size: Option<String>,
     #[doc = "The set of locations that the SKU is available"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Locations and zones"]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationInfoItem>,
     #[doc = "The restrictions because of which SKU cannot be used"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<serde_json::Value>,
 }
 impl SkuDescription {
@@ -6914,7 +7249,11 @@ impl SkuDescription {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuDescriptionList {
     #[doc = "SKU descriptions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuDescription>,
 }
 impl azure_core::Continuable for SkuDescriptionList {
@@ -6934,7 +7273,11 @@ pub struct SkuLocationInfoItem {
     #[doc = "The available location of the SKU."]
     pub location: String,
     #[doc = "The available zone of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl SkuLocationInfoItem {
@@ -7015,7 +7358,11 @@ pub struct SparkConfigurationInfo {
     #[doc = "SparkConfiguration configs."]
     pub configs: serde_json::Value,
     #[doc = "Annotations for SparkConfiguration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub annotations: Vec<String>,
     #[doc = "additional Notes."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7121,7 +7468,11 @@ impl SqlPoolBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7153,7 +7504,12 @@ pub struct SqlPoolBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -7192,7 +7548,11 @@ pub mod sql_pool_blob_auditing_policy_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolBlobAuditingPolicySqlPoolOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7227,7 +7587,11 @@ impl SqlPoolColumn {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolColumnListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolColumn>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7454,7 +7818,11 @@ pub struct SqlPoolInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of SQL pools"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPool>,
 }
 impl azure_core::Continuable for SqlPoolInfoListResult {
@@ -7747,7 +8115,11 @@ impl SqlPoolSchema {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolSchemaListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolSchema>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7793,7 +8165,11 @@ impl SqlPoolTable {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolTableListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolTable>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7878,7 +8254,11 @@ impl SqlPoolVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7988,7 +8368,11 @@ pub struct SsisEnvironment {
     #[serde(rename = "folderId", default, skip_serializing_if = "Option::is_none")]
     pub folder_id: Option<i64>,
     #[doc = "Variable in environment"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub variables: Vec<SsisVariable>,
 }
 impl SsisEnvironment {
@@ -8062,7 +8446,11 @@ impl SsisObjectMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SsisObjectMetadataListResponse {
     #[doc = "List of SSIS object metadata."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SsisObjectMetadata>,
     #[doc = "The link to the next page of results, if any remaining results exist."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8150,7 +8538,11 @@ pub struct SsisPackage {
     #[serde(rename = "projectId", default, skip_serializing_if = "Option::is_none")]
     pub project_id: Option<i64>,
     #[doc = "Parameters in package"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<SsisParameter>,
 }
 impl SsisPackage {
@@ -8221,10 +8613,19 @@ pub struct SsisProject {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<i64>,
     #[doc = "Environment reference in project"]
-    #[serde(rename = "environmentRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_refs: Vec<SsisEnvironmentReference>,
     #[doc = "Parameters in project"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<SsisParameter>,
 }
 impl SsisProject {
@@ -8283,22 +8684,52 @@ impl SubResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TableLevelSharingProperties {
     #[doc = "List of tables to include in the follower database"]
-    #[serde(rename = "tablesToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tablesToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables_to_include: Vec<String>,
     #[doc = "List of tables to exclude from the follower database"]
-    #[serde(rename = "tablesToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tablesToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables_to_exclude: Vec<String>,
     #[doc = "List of external tables to include in the follower database"]
-    #[serde(rename = "externalTablesToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalTablesToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_tables_to_include: Vec<String>,
     #[doc = "List of external tables exclude from the follower database"]
-    #[serde(rename = "externalTablesToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalTablesToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_tables_to_exclude: Vec<String>,
     #[doc = "List of materialized views to include in the follower database"]
-    #[serde(rename = "materializedViewsToInclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "materializedViewsToInclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub materialized_views_to_include: Vec<String>,
     #[doc = "List of materialized views exclude from the follower database"]
-    #[serde(rename = "materializedViewsToExclude", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "materializedViewsToExclude",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub materialized_views_to_exclude: Vec<String>,
 }
 impl TableLevelSharingProperties {
@@ -8331,7 +8762,11 @@ pub struct TopQueries {
     #[serde(rename = "observedMetric", default, skip_serializing_if = "Option::is_none")]
     pub observed_metric: Option<top_queries::ObservedMetric>,
     #[doc = "The list of queries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub queries: Vec<QueryStatistic>,
 }
 impl TopQueries {
@@ -8434,7 +8869,11 @@ impl TransparentDataEncryption {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransparentDataEncryptionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TransparentDataEncryption>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8544,7 +8983,11 @@ pub struct VulnerabilityAssessmentRecurringScansProperties {
     #[serde(rename = "emailSubscriptionAdmins", default, skip_serializing_if = "Option::is_none")]
     pub email_subscription_admins: Option<bool>,
     #[doc = "Specifies an array of e-mail addresses to which the scan notification is sent."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
 }
 impl VulnerabilityAssessmentRecurringScansProperties {
@@ -8585,7 +9028,11 @@ impl VulnerabilityAssessmentScanRecord {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VulnerabilityAssessmentScanRecordListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VulnerabilityAssessmentScanRecord>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8621,7 +9068,11 @@ pub struct VulnerabilityAssessmentScanRecordProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The scan errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<VulnerabilityAssessmentScanError>,
     #[doc = "The scan results storage container path."]
     #[serde(rename = "storageContainerPath", default, skip_serializing_if = "Option::is_none")]
@@ -8734,7 +9185,11 @@ impl WorkloadClassifier {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadClassifierListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadClassifier>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8803,7 +9258,11 @@ impl WorkloadGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -8896,7 +9355,11 @@ pub struct WorkspaceInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of workspaces"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
 }
 impl azure_core::Continuable for WorkspaceInfoListResult {
@@ -9041,7 +9504,12 @@ pub struct WorkspaceProperties {
     #[serde(rename = "managedVirtualNetwork", default, skip_serializing_if = "Option::is_none")]
     pub managed_virtual_network: Option<String>,
     #[doc = "Private endpoint connections to the workspace"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Details of the encryption associated with the workspace"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/synapse/src/package_kusto_pool_2021_04_preview/models.rs b/services/mgmt/synapse/src/package_kusto_pool_2021_04_preview/models.rs
index e4e3a1732b..920b7b7fa9 100644
--- a/services/mgmt/synapse/src/package_kusto_pool_2021_04_preview/models.rs
+++ b/services/mgmt/synapse/src/package_kusto_pool_2021_04_preview/models.rs
@@ -296,7 +296,11 @@ impl ClusterPrincipalAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterPrincipalAssignmentListResult {
     #[doc = "The list of Kusto cluster principal assignments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClusterPrincipalAssignment>,
 }
 impl azure_core::Continuable for ClusterPrincipalAssignmentListResult {
@@ -537,7 +541,11 @@ pub mod data_connection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataConnectionListResult {
     #[doc = "The list of Kusto data connections."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataConnection>,
 }
 impl azure_core::Continuable for DataConnectionListResult {
@@ -619,7 +627,11 @@ pub mod database {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabaseListResult {
     #[doc = "The list of Kusto databases."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Database>,
 }
 impl azure_core::Continuable for DatabaseListResult {
@@ -654,7 +666,11 @@ impl DatabasePrincipalAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatabasePrincipalAssignmentListResult {
     #[doc = "The list of Kusto database principal assignments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DatabasePrincipalAssignment>,
 }
 impl azure_core::Continuable for DatabasePrincipalAssignmentListResult {
@@ -836,10 +852,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -1028,7 +1053,12 @@ pub struct EventHubConnectionProperties {
     #[serde(rename = "dataFormat", default, skip_serializing_if = "Option::is_none")]
     pub data_format: Option<EventHubDataFormat>,
     #[doc = "System properties of the event hub"]
-    #[serde(rename = "eventSystemProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eventSystemProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub event_system_properties: Vec<String>,
     #[doc = "The compression type"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1168,7 +1198,12 @@ pub struct IotHubConnectionProperties {
     #[serde(rename = "dataFormat", default, skip_serializing_if = "Option::is_none")]
     pub data_format: Option<IotHubDataFormat>,
     #[doc = "System properties of the iot hub"]
-    #[serde(rename = "eventSystemProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eventSystemProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub event_system_properties: Vec<String>,
     #[doc = "The name of the share access policy"]
     #[serde(rename = "sharedAccessPolicyName")]
@@ -1344,7 +1379,11 @@ pub mod kusto_pool_check_name_request {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KustoPoolListResult {
     #[doc = "The list of Kusto pools."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KustoPool>,
 }
 impl KustoPoolListResult {
@@ -1532,7 +1571,11 @@ pub mod operation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
diff --git a/services/mgmt/synapse/src/package_preview_2021_06/models.rs b/services/mgmt/synapse/src/package_preview_2021_06/models.rs
index 3aee3a3919..2ad1cf6385 100644
--- a/services/mgmt/synapse/src/package_preview_2021_06/models.rs
+++ b/services/mgmt/synapse/src/package_preview_2021_06/models.rs
@@ -120,7 +120,11 @@ impl AzureAdOnlyAuthentication {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureAdOnlyAuthenticationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureAdOnlyAuthentication>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -251,7 +255,11 @@ pub struct BigDataPoolResourceInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of Big Data pools"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BigDataPoolResourceInfo>,
 }
 impl azure_core::Continuable for BigDataPoolResourceInfoListResult {
@@ -305,7 +313,12 @@ pub struct BigDataPoolResourceProperties {
     #[serde(rename = "libraryRequirements", default, skip_serializing_if = "Option::is_none")]
     pub library_requirements: Option<LibraryRequirements>,
     #[doc = "List of custom libraries/packages associated with the spark pool."]
-    #[serde(rename = "customLibraries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customLibraries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_libraries: Vec<LibraryInfo>,
     #[doc = "SparkConfig Properties for a Big Data pool powered by Apache Spark"]
     #[serde(rename = "sparkConfigProperties", default, skip_serializing_if = "Option::is_none")]
@@ -705,7 +718,11 @@ impl DataMaskingRule {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataMaskingRuleListResult {
     #[doc = "The list of Sql pool data masking rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataMaskingRule>,
 }
 impl azure_core::Continuable for DataMaskingRuleListResult {
@@ -1060,7 +1077,11 @@ impl DedicatedSqLminimalTlsSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DedicatedSqLminimalTlsSettingsListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DedicatedSqLminimalTlsSettings>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1146,7 +1167,11 @@ impl EncryptionProtector {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EncryptionProtectorListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EncryptionProtector>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1351,10 +1376,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -1398,7 +1432,11 @@ impl ExtendedServerBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtendedServerBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtendedServerBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1433,7 +1471,12 @@ pub struct ExtendedServerBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -1491,7 +1534,11 @@ impl ExtendedSqlPoolBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtendedSqlPoolBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtendedSqlPoolBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1526,7 +1573,12 @@ pub struct ExtendedSqlPoolBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -1594,7 +1646,11 @@ impl GeoBackupPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GeoBackupPolicyListResult {
     #[doc = "The list of geo backup policies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GeoBackupPolicy>,
 }
 impl azure_core::Continuable for GeoBackupPolicyListResult {
@@ -1887,7 +1943,11 @@ pub struct IntegrationRuntimeMonitoringData {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Integration runtime node monitoring data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<IntegrationRuntimeNodeMonitoringData>,
 }
 impl IntegrationRuntimeMonitoringData {
@@ -1947,7 +2007,11 @@ pub struct IntegrationRuntimeOutboundNetworkDependenciesCategoryEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints for outbound network dependency."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<IntegrationRuntimeOutboundNetworkDependenciesEndpoint>,
 }
 impl IntegrationRuntimeOutboundNetworkDependenciesCategoryEndpoint {
@@ -1962,7 +2026,12 @@ pub struct IntegrationRuntimeOutboundNetworkDependenciesEndpoint {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The details of endpoint."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<IntegrationRuntimeOutboundNetworkDependenciesEndpointDetails>,
 }
 impl IntegrationRuntimeOutboundNetworkDependenciesEndpoint {
@@ -1986,7 +2055,11 @@ impl IntegrationRuntimeOutboundNetworkDependenciesEndpointDetails {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IntegrationRuntimeOutboundNetworkDependenciesEndpointsResponse {
     #[doc = "The list of outbound network dependency endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IntegrationRuntimeOutboundNetworkDependenciesCategoryEndpoint>,
 }
 impl IntegrationRuntimeOutboundNetworkDependenciesEndpointsResponse {
@@ -2149,7 +2222,12 @@ pub struct IntegrationRuntimeSsisProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub edition: Option<integration_runtime_ssis_properties::Edition>,
     #[doc = "Custom setup without script properties for a SSIS integration runtime."]
-    #[serde(rename = "expressCustomSetupProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "expressCustomSetupProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub express_custom_setup_properties: Vec<CustomSetupBase>,
 }
 impl IntegrationRuntimeSsisProperties {
@@ -2370,7 +2448,12 @@ pub struct IntegrationRuntimeVNetProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub subnet: Option<String>,
     #[doc = "Resource IDs of the public IP addresses that this integration runtime will use."]
-    #[serde(rename = "publicIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_i_ps: Vec<String>,
     #[doc = "The ID of subnet, to which this Azure-SSIS integration runtime will be joined."]
     #[serde(rename = "subnetId", default, skip_serializing_if = "Option::is_none")]
@@ -2402,7 +2485,11 @@ pub struct IpFirewallRuleInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of IP firewall rules"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IpFirewallRuleInfo>,
 }
 impl azure_core::Continuable for IpFirewallRuleInfoListResult {
@@ -2516,7 +2603,11 @@ pub struct KeyInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Key>,
 }
 impl azure_core::Continuable for KeyInfoListResult {
@@ -2720,7 +2811,11 @@ impl LinkedIntegrationRuntimeType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ListSqlPoolSecurityAlertPolicies {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2758,7 +2853,12 @@ pub struct MaintenanceWindowOptionsProperties {
     #[serde(rename = "isEnabled", default, skip_serializing_if = "Option::is_none")]
     pub is_enabled: Option<bool>,
     #[doc = "Available maintenance cycles e.g. {Saturday, 0, 48*60}, {Wednesday, 0, 24*60}."]
-    #[serde(rename = "maintenanceWindowCycles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "maintenanceWindowCycles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub maintenance_window_cycles: Vec<MaintenanceWindowTimeRange>,
     #[doc = "Minimum duration of maintenance window."]
     #[serde(rename = "minDurationInMinutes", default, skip_serializing_if = "Option::is_none")]
@@ -2870,7 +2970,12 @@ impl MaintenanceWindows {
 #[doc = "Maintenance windows resource properties."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MaintenanceWindowsProperties {
-    #[serde(rename = "timeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_ranges: Vec<MaintenanceWindowTimeRange>,
 }
 impl MaintenanceWindowsProperties {
@@ -3010,7 +3115,11 @@ pub struct ManagedIntegrationRuntimeError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "Managed integration runtime error parameters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<String>,
     #[doc = "Error message."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3049,7 +3158,11 @@ pub struct ManagedIntegrationRuntimeNode {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<managed_integration_runtime_node::Status>,
     #[doc = "The errors that occurred on this integration runtime node."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ManagedIntegrationRuntimeError>,
 }
 impl ManagedIntegrationRuntimeNode {
@@ -3117,7 +3230,11 @@ pub struct ManagedIntegrationRuntimeOperationResult {
     #[serde(rename = "errorCode", default, skip_serializing_if = "Option::is_none")]
     pub error_code: Option<String>,
     #[doc = "Managed integration runtime error parameters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<String>,
     #[doc = "The activity id for the operation request."]
     #[serde(rename = "activityId", default, skip_serializing_if = "Option::is_none")]
@@ -3155,10 +3272,19 @@ pub struct ManagedIntegrationRuntimeStatusTypeProperties {
     #[serde(rename = "createTime", default, with = "azure_core::date::rfc3339::option")]
     pub create_time: Option<time::OffsetDateTime>,
     #[doc = "The list of nodes for managed integration runtime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<ManagedIntegrationRuntimeNode>,
     #[doc = "The errors that occurred on this integration runtime."]
-    #[serde(rename = "otherErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "otherErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub other_errors: Vec<ManagedIntegrationRuntimeError>,
     #[doc = "Properties of managed integration runtime operation result."]
     #[serde(rename = "lastOperation", default, skip_serializing_if = "Option::is_none")]
@@ -3194,7 +3320,12 @@ pub struct ManagedVirtualNetworkSettings {
     #[serde(rename = "linkedAccessCheckOnTargetResource", default, skip_serializing_if = "Option::is_none")]
     pub linked_access_check_on_target_resource: Option<bool>,
     #[doc = "Allowed Aad Tenant Ids For Linking"]
-    #[serde(rename = "allowedAadTenantIdsForLinking", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAadTenantIdsForLinking",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_aad_tenant_ids_for_linking: Vec<String>,
 }
 impl ManagedVirtualNetworkSettings {
@@ -3298,7 +3429,11 @@ pub struct OperationMetaMetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Metric dimensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<OperationMetaMetricDimensionSpecification>,
     #[doc = "Whether the metric supports instance-level aggregation"]
     #[serde(rename = "supportsInstanceLevelAggregation", default, skip_serializing_if = "Option::is_none")]
@@ -3328,10 +3463,20 @@ impl OperationMetaPropertyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationMetaServiceSpecification {
     #[doc = "Service metric specifications"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetaMetricSpecification>,
     #[doc = "Service log specifications"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationMetaLogSpecification>,
 }
 impl OperationMetaServiceSpecification {
@@ -3473,7 +3618,11 @@ impl PrivateEndpointConnectionForPrivateLinkHubBasic {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionForPrivateLinkHubResourceCollectionResponse {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnectionForPrivateLinkHub>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -3493,7 +3642,11 @@ impl PrivateEndpointConnectionForPrivateLinkHubResourceCollectionResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionList {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3552,7 +3705,11 @@ pub struct PrivateLinkHubInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of privateLinkHubs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkHub>,
 }
 impl azure_core::Continuable for PrivateLinkHubInfoListResult {
@@ -3585,7 +3742,12 @@ pub struct PrivateLinkHubProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<String>,
     #[doc = "List of private endpoint connections"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnectionForPrivateLinkHubBasic>,
 }
 impl PrivateLinkHubProperties {
@@ -3611,7 +3773,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3635,10 +3801,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required DNS zone names of the the private link resource."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -3697,7 +3873,11 @@ pub struct QueryInterval {
     #[serde(rename = "executionCount", default, skip_serializing_if = "Option::is_none")]
     pub execution_count: Option<f64>,
     #[doc = "The list of query metrics during this interval."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<QueryMetric>,
 }
 impl QueryInterval {
@@ -3746,7 +3926,11 @@ pub struct QueryStatistic {
     #[serde(rename = "queryId", default, skip_serializing_if = "Option::is_none")]
     pub query_id: Option<String>,
     #[doc = "The list of query intervals."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub intervals: Vec<QueryInterval>,
 }
 impl QueryStatistic {
@@ -3771,7 +3955,11 @@ impl RecommendedSensitivityLabelUpdate {
 #[doc = "A list of recommended sensitivity label update operations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecommendedSensitivityLabelUpdateList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<RecommendedSensitivityLabelUpdate>,
 }
 impl RecommendedSensitivityLabelUpdateList {
@@ -3823,7 +4011,11 @@ impl RecoverableSqlPool {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecoverableSqlPoolListResult {
     #[doc = "A list of recoverable sql pool"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RecoverableSqlPool>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3909,7 +4101,11 @@ impl ReplicationLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicationLinkListResult {
     #[doc = "The list of Sql pool replication links housed in the Sql pool."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReplicationLink>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4148,7 +4344,11 @@ impl RestorePoint {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestorePointListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RestorePoint>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4371,10 +4571,20 @@ pub struct SecurityAlertPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled or a policy has not been applied yet on the specific Sql pool."]
     pub state: security_alert_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly, Data_Exfiltration, Unsafe_Action"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -4628,7 +4838,11 @@ pub struct SelfHostedIntegrationRuntimeStatusTypeProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "The list of nodes for this integration runtime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nodes: Vec<SelfHostedIntegrationRuntimeNode>,
     #[doc = "The date at which the integration runtime will be scheduled to update, in ISO8601 format."]
     #[serde(rename = "scheduledUpdateDate", default, with = "azure_core::date::rfc3339::option")]
@@ -4643,7 +4857,12 @@ pub struct SelfHostedIntegrationRuntimeStatusTypeProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capabilities: Option<serde_json::Value>,
     #[doc = "The URLs for the services used in integration runtime backend service."]
-    #[serde(rename = "serviceUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_urls: Vec<String>,
     #[doc = "The state of integration runtime auto update."]
     #[serde(rename = "autoUpdate", default, skip_serializing_if = "Option::is_none")]
@@ -4652,7 +4871,11 @@ pub struct SelfHostedIntegrationRuntimeStatusTypeProperties {
     #[serde(rename = "versionStatus", default, skip_serializing_if = "Option::is_none")]
     pub version_status: Option<String>,
     #[doc = "The list of linked integration runtimes that are created to share with this integration runtime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<LinkedIntegrationRuntime>,
     #[doc = "The version that the integration runtime is going to update to."]
     #[serde(rename = "pushedVersion", default, skip_serializing_if = "Option::is_none")]
@@ -4667,7 +4890,12 @@ pub struct SelfHostedIntegrationRuntimeStatusTypeProperties {
     #[serde(rename = "serviceRegion", default, skip_serializing_if = "Option::is_none")]
     pub service_region: Option<String>,
     #[doc = "The newer versions on download center."]
-    #[serde(rename = "newerVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "newerVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub newer_versions: Vec<String>,
 }
 impl SelfHostedIntegrationRuntimeStatusTypeProperties {
@@ -4750,7 +4978,11 @@ impl SensitivityLabel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SensitivityLabelListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SensitivityLabel>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4830,7 +5062,11 @@ impl SensitivityLabelUpdate {
 #[doc = "A list of sensitivity label update operations."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SensitivityLabelUpdateList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<SensitivityLabelUpdate>,
 }
 impl SensitivityLabelUpdateList {
@@ -4891,7 +5127,11 @@ impl ServerBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4923,7 +5163,12 @@ pub struct ServerBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -4984,7 +5229,11 @@ impl ServerSecurityAlertPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerSecurityAlertPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerSecurityAlertPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5007,10 +5256,20 @@ pub struct ServerSecurityAlertPolicyProperties {
     #[doc = "Specifies the state of the policy, whether it is enabled or disabled or a policy has not been applied yet on the specific server"]
     pub state: server_security_alert_policy_properties::State,
     #[doc = "Specifies an array of alerts that are disabled. Allowed values are: Sql_Injection, Sql_Injection_Vulnerability, Access_Anomaly, Data_Exfiltration, Unsafe_Action"]
-    #[serde(rename = "disabledAlerts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "disabledAlerts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disabled_alerts: Vec<String>,
     #[doc = "Specifies an array of e-mail addresses to which the alert is sent."]
-    #[serde(rename = "emailAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "emailAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub email_addresses: Vec<String>,
     #[doc = "Specifies that the alert is sent to the account administrators."]
     #[serde(rename = "emailAccountAdmins", default, skip_serializing_if = "Option::is_none")]
@@ -5120,7 +5379,11 @@ impl ServerVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServerVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServerVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5251,7 +5514,11 @@ pub struct SparkConfigurationInfo {
     #[doc = "SparkConfiguration configs."]
     pub configs: serde_json::Value,
     #[doc = "Annotations for SparkConfiguration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub annotations: Vec<String>,
     #[doc = "additional Notes."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5357,7 +5624,11 @@ impl SqlPoolBlobAuditingPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolBlobAuditingPolicyListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolBlobAuditingPolicy>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5389,7 +5660,12 @@ pub struct SqlPoolBlobAuditingPolicyProperties {
     #[serde(rename = "retentionDays", default, skip_serializing_if = "Option::is_none")]
     pub retention_days: Option<i32>,
     #[doc = "Specifies the Actions-Groups and Actions to audit.\r\n\r\nThe recommended set of action groups to use is the following combination - this will audit all the queries and stored procedures executed against the database, as well as successful and failed logins:\r\n\r\nBATCH_COMPLETED_GROUP,\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP,\r\nFAILED_DATABASE_AUTHENTICATION_GROUP.\r\n\r\nThis above combination is also the set that is configured by default when enabling auditing from the Azure portal.\r\n\r\nThe supported action groups to audit are (note: choose only specific groups that cover your auditing needs. Using unnecessary groups could lead to very large quantities of audit records):\r\n\r\nAPPLICATION_ROLE_CHANGE_PASSWORD_GROUP\r\nBACKUP_RESTORE_GROUP\r\nDATABASE_LOGOUT_GROUP\r\nDATABASE_OBJECT_CHANGE_GROUP\r\nDATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nDATABASE_OBJECT_PERMISSION_CHANGE_GROUP\r\nDATABASE_OPERATION_GROUP\r\nDATABASE_PERMISSION_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_CHANGE_GROUP\r\nDATABASE_PRINCIPAL_IMPERSONATION_GROUP\r\nDATABASE_ROLE_MEMBER_CHANGE_GROUP\r\nFAILED_DATABASE_AUTHENTICATION_GROUP\r\nSCHEMA_OBJECT_ACCESS_GROUP\r\nSCHEMA_OBJECT_CHANGE_GROUP\r\nSCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP\r\nSCHEMA_OBJECT_PERMISSION_CHANGE_GROUP\r\nSUCCESSFUL_DATABASE_AUTHENTICATION_GROUP\r\nUSER_CHANGE_PASSWORD_GROUP\r\nBATCH_STARTED_GROUP\r\nBATCH_COMPLETED_GROUP\r\n\r\nThese are groups that cover all sql statements and stored procedures executed against the database, and should not be used in combination with other groups as this will result in duplicate audit logs.\r\n\r\nFor more information, see [Database-Level Audit Action Groups](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-action-groups).\r\n\r\nFor Database auditing policy, specific Actions can also be specified (note that Actions cannot be specified for Server auditing policy). The supported actions to audit are:\r\nSELECT\r\nUPDATE\r\nINSERT\r\nDELETE\r\nEXECUTE\r\nRECEIVE\r\nREFERENCES\r\n\r\nThe general form for defining an action to be audited is:\r\n{action} ON {object} BY {principal}\r\n\r\nNote that <object> in the above format can refer to an object like a table, view, or stored procedure, or an entire database or schema. For the latter cases, the forms DATABASE::{db_name} and SCHEMA::{schema_name} are used, respectively.\r\n\r\nFor example:\r\nSELECT on dbo.myTable by public\r\nSELECT on DATABASE::myDatabase by public\r\nSELECT on SCHEMA::mySchema by public\r\n\r\nFor more information, see [Database-Level Audit Actions](https://docs.microsoft.com/en-us/sql/relational-databases/security/auditing/sql-server-audit-action-groups-and-actions#database-level-audit-actions)"]
-    #[serde(rename = "auditActionsAndGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "auditActionsAndGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audit_actions_and_groups: Vec<String>,
     #[doc = "Specifies the blob storage subscription Id."]
     #[serde(rename = "storageAccountSubscriptionId", default, skip_serializing_if = "Option::is_none")]
@@ -5428,7 +5704,11 @@ pub mod sql_pool_blob_auditing_policy_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolBlobAuditingPolicySqlPoolOperationListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolOperation>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5463,7 +5743,11 @@ impl SqlPoolColumn {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolColumnListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolColumn>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5690,7 +5974,11 @@ pub struct SqlPoolInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of SQL pools"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPool>,
 }
 impl azure_core::Continuable for SqlPoolInfoListResult {
@@ -5978,7 +6266,11 @@ impl SqlPoolSchema {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolSchemaListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolSchema>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6024,7 +6316,11 @@ impl SqlPoolTable {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolTableListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolTable>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6109,7 +6405,11 @@ impl SqlPoolVulnerabilityAssessment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolVulnerabilityAssessmentListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolVulnerabilityAssessment>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6219,7 +6519,11 @@ pub struct SsisEnvironment {
     #[serde(rename = "folderId", default, skip_serializing_if = "Option::is_none")]
     pub folder_id: Option<i64>,
     #[doc = "Variable in environment"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub variables: Vec<SsisVariable>,
 }
 impl SsisEnvironment {
@@ -6293,7 +6597,11 @@ impl SsisObjectMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SsisObjectMetadataListResponse {
     #[doc = "List of SSIS object metadata."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SsisObjectMetadata>,
     #[doc = "The link to the next page of results, if any remaining results exist."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6381,7 +6689,11 @@ pub struct SsisPackage {
     #[serde(rename = "projectId", default, skip_serializing_if = "Option::is_none")]
     pub project_id: Option<i64>,
     #[doc = "Parameters in package"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<SsisParameter>,
 }
 impl SsisPackage {
@@ -6452,10 +6764,19 @@ pub struct SsisProject {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<i64>,
     #[doc = "Environment reference in project"]
-    #[serde(rename = "environmentRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_refs: Vec<SsisEnvironmentReference>,
     #[doc = "Parameters in project"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<SsisParameter>,
 }
 impl SsisProject {
@@ -6535,7 +6856,11 @@ pub struct TopQueries {
     #[serde(rename = "observedMetric", default, skip_serializing_if = "Option::is_none")]
     pub observed_metric: Option<top_queries::ObservedMetric>,
     #[doc = "The list of queries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub queries: Vec<QueryStatistic>,
 }
 impl TopQueries {
@@ -6638,7 +6963,11 @@ impl TransparentDataEncryption {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TransparentDataEncryptionListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TransparentDataEncryption>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6792,7 +7121,11 @@ pub struct VulnerabilityAssessmentRecurringScansProperties {
     #[serde(rename = "emailSubscriptionAdmins", default, skip_serializing_if = "Option::is_none")]
     pub email_subscription_admins: Option<bool>,
     #[doc = "Specifies an array of e-mail addresses to which the scan notification is sent."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
 }
 impl VulnerabilityAssessmentRecurringScansProperties {
@@ -6833,7 +7166,11 @@ impl VulnerabilityAssessmentScanRecord {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VulnerabilityAssessmentScanRecordListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VulnerabilityAssessmentScanRecord>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -6869,7 +7206,11 @@ pub struct VulnerabilityAssessmentScanRecordProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The scan errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<VulnerabilityAssessmentScanError>,
     #[doc = "The scan results storage container path."]
     #[serde(rename = "storageContainerPath", default, skip_serializing_if = "Option::is_none")]
@@ -6982,7 +7323,11 @@ impl WorkloadClassifier {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadClassifierListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadClassifier>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7051,7 +7396,11 @@ impl WorkloadGroup {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadGroupListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadGroup>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -7144,7 +7493,11 @@ pub struct WorkspaceInfoListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of workspaces"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workspace>,
 }
 impl azure_core::Continuable for WorkspaceInfoListResult {
@@ -7289,7 +7642,12 @@ pub struct WorkspaceProperties {
     #[serde(rename = "managedVirtualNetwork", default, skip_serializing_if = "Option::is_none")]
     pub managed_virtual_network: Option<String>,
     #[doc = "Private endpoint connections to the workspace"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "Details of the encryption associated with the workspace"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/synapse/src/package_sqlgen3_2020_04_01_preview/models.rs b/services/mgmt/synapse/src/package_sqlgen3_2020_04_01_preview/models.rs
index 9da7640c1d..09eda9ce88 100644
--- a/services/mgmt/synapse/src/package_sqlgen3_2020_04_01_preview/models.rs
+++ b/services/mgmt/synapse/src/package_sqlgen3_2020_04_01_preview/models.rs
@@ -76,10 +76,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -169,7 +178,11 @@ pub struct OperationMetaMetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Metric dimensions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<OperationMetaMetricDimensionSpecification>,
     #[doc = "Whether the metric supports instance-level aggregation"]
     #[serde(rename = "supportsInstanceLevelAggregation", default, skip_serializing_if = "Option::is_none")]
@@ -199,10 +212,20 @@ impl OperationMetaPropertyInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationMetaServiceSpecification {
     #[doc = "Service metric specifications"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<OperationMetaMetricSpecification>,
     #[doc = "Service log specifications"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<OperationMetaLogSpecification>,
 }
 impl OperationMetaServiceSpecification {
@@ -359,7 +382,11 @@ impl SqlDatabaseDataRetention {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlDatabaseListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlDatabase>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -542,7 +569,11 @@ impl SqlDatabaseUpdate {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SqlPoolListResult {
     #[doc = "Array of results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SqlPoolV3>,
     #[doc = "Link to retrieve next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/testbase/src/package_2020_12_16_preview/models.rs b/services/mgmt/testbase/src/package_2020_12_16_preview/models.rs
index dea41f327a..77daa488be 100644
--- a/services/mgmt/testbase/src/package_2020_12_16_preview/models.rs
+++ b/services/mgmt/testbase/src/package_2020_12_16_preview/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AnalysisResultListResult {
     #[doc = "The list of Analysis Results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AnalysisResultSingletonResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -115,7 +119,11 @@ pub mod analysis_result_singleton_resource_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOsListResult {
     #[doc = "The list of available OSs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableOsResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -182,7 +190,12 @@ pub struct CpuRegressionResultSingletonResourceProperties {
     #[serde(flatten)]
     pub analysis_result_singleton_resource_properties: AnalysisResultSingletonResourceProperties,
     #[doc = "The result array data."]
-    #[serde(rename = "cpuRegressionResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cpuRegressionResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cpu_regression_results: Vec<RegressionResult>,
 }
 impl CpuRegressionResultSingletonResourceProperties {
@@ -199,7 +212,12 @@ pub struct CpuUtilizationResultSingletonResourceProperties {
     #[serde(flatten)]
     pub analysis_result_singleton_resource_properties: AnalysisResultSingletonResourceProperties,
     #[doc = "The result array data."]
-    #[serde(rename = "cpuUtilizationResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cpuUtilizationResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cpu_utilization_results: Vec<UtilizationResult>,
 }
 impl CpuUtilizationResultSingletonResourceProperties {
@@ -404,7 +422,11 @@ pub mod command {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomerEventListResult {
     #[doc = "The list of Test Base Customer Events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomerEventResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -456,7 +478,12 @@ impl CustomerEventResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DistributionGroupListReceiverValue {
     #[doc = "The list of distribution groups."]
-    #[serde(rename = "distributionGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "distributionGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub distribution_groups: Vec<String>,
 }
 impl DistributionGroupListReceiverValue {
@@ -483,7 +510,11 @@ impl DownloadUrlResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EmailEventListResult {
     #[doc = "The list of email events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EmailEventResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -548,7 +579,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -578,7 +613,11 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FavoriteProcessListResult {
     #[doc = "The list of favorite processes for a package."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FavoriteProcessResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -643,7 +682,11 @@ impl FileUploadUrlResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FlightingRingListResult {
     #[doc = "The list of flighting rings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FlightingRingResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -775,7 +818,12 @@ pub struct MemoryRegressionResultSingletonResourceProperties {
     #[serde(flatten)]
     pub analysis_result_singleton_resource_properties: AnalysisResultSingletonResourceProperties,
     #[doc = "The result array data."]
-    #[serde(rename = "memoryRegressionResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "memoryRegressionResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub memory_regression_results: Vec<RegressionResult>,
 }
 impl MemoryRegressionResultSingletonResourceProperties {
@@ -792,7 +840,12 @@ pub struct MemoryUtilizationResultSingletonResourceProperties {
     #[serde(flatten)]
     pub analysis_result_singleton_resource_properties: AnalysisResultSingletonResourceProperties,
     #[doc = "The result array data."]
-    #[serde(rename = "memoryUtilizationResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "memoryUtilizationResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub memory_utilization_results: Vec<UtilizationResult>,
 }
 impl MemoryUtilizationResultSingletonResourceProperties {
@@ -840,7 +893,11 @@ impl NotificationReceiverValue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OsUpdateListResult {
     #[doc = "The list of OS Updates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OsUpdateResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1002,7 +1059,12 @@ pub struct OsUpdatesTestSummary {
     #[serde(rename = "testRunTime", default, skip_serializing_if = "Option::is_none")]
     pub test_run_time: Option<String>,
     #[doc = "Detailed summary for each OS update"]
-    #[serde(rename = "osUpdateTestSummaries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "osUpdateTestSummaries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub os_update_test_summaries: Vec<OsUpdateTestSummary>,
 }
 impl OsUpdatesTestSummary {
@@ -1062,7 +1124,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Test Base resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1115,7 +1181,11 @@ impl PackageCheckNameAvailabilityParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PackageListResult {
     #[doc = "The list of Test Base Packages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PackageResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1144,7 +1214,12 @@ pub struct PackageProperties {
     #[doc = "Application version"]
     pub version: String,
     #[doc = "OOB, functional or both. Mapped to the data in 'tests' property."]
-    #[serde(rename = "testTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "testTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub test_types: Vec<TestType>,
     #[doc = "Specifies the target OSs of specific OS Update types."]
     #[serde(rename = "targetOSList")]
@@ -1165,7 +1240,12 @@ pub struct PackageProperties {
     #[serde(rename = "blobPath")]
     pub blob_path: String,
     #[doc = "The validation results. There's validation on package when it's created or updated."]
-    #[serde(rename = "validationResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_results: Vec<PackageValidationResult>,
     #[doc = "The detailed test information."]
     pub tests: Vec<Test>,
@@ -1274,7 +1354,12 @@ impl PackageResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PackageUpdateParameterProperties {
     #[doc = "Specifies the target OSs of specific OS Update types."]
-    #[serde(rename = "targetOSList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetOSList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_os_list: Vec<TargetOsInfo>,
     #[doc = "The flighting ring for feature update."]
     #[serde(rename = "flightingRing", default, skip_serializing_if = "Option::is_none")]
@@ -1286,7 +1371,11 @@ pub struct PackageUpdateParameterProperties {
     #[serde(rename = "blobPath", default, skip_serializing_if = "Option::is_none")]
     pub blob_path: Option<String>,
     #[doc = "The detailed test information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tests: Vec<Test>,
 }
 impl PackageUpdateParameterProperties {
@@ -1319,7 +1408,11 @@ pub struct PackageValidationResult {
     #[serde(rename = "isValid", default, skip_serializing_if = "Option::is_none")]
     pub is_valid: Option<bool>,
     #[doc = "Error information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<String>,
 }
 impl PackageValidationResult {
@@ -1464,7 +1557,12 @@ pub struct ReliabilityResultSingletonResourceProperties {
     #[serde(flatten)]
     pub analysis_result_singleton_resource_properties: AnalysisResultSingletonResourceProperties,
     #[doc = "The result array data."]
-    #[serde(rename = "reliabilityResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reliabilityResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reliability_results: Vec<ReliabilityResult>,
 }
 impl ReliabilityResultSingletonResourceProperties {
@@ -1523,7 +1621,12 @@ pub struct ScriptExecutionResultSingletonResourceProperties {
     #[serde(flatten)]
     pub analysis_result_singleton_resource_properties: AnalysisResultSingletonResourceProperties,
     #[doc = "The result array data."]
-    #[serde(rename = "scriptExecutionResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scriptExecutionResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub script_execution_results: Vec<ScriptExecutionResult>,
 }
 impl ScriptExecutionResultSingletonResourceProperties {
@@ -1769,7 +1872,12 @@ pub struct TestAnalysisResult {
     #[serde(rename = "testAnalysisStatus", default, skip_serializing_if = "Option::is_none")]
     pub test_analysis_status: Option<test_analysis_result::TestAnalysisStatus>,
     #[doc = "The array of identified failures."]
-    #[serde(rename = "identifiedFailures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "identifiedFailures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identified_failures: Vec<IdentifiedFailure>,
 }
 impl TestAnalysisResult {
@@ -1842,7 +1950,11 @@ impl TestAnalysisResultSingletonResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestBaseAccountListResult {
     #[doc = "The list of Test Base Accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TestBaseAccountResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1912,10 +2024,18 @@ pub struct TestBaseAccountSku {
     #[doc = "The tier of this particular SKU."]
     pub tier: test_base_account_sku::Tier,
     #[doc = "The capabilities of a SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<TestBaseAccountSkuCapability>,
     #[doc = "The locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl TestBaseAccountSku {
@@ -1984,7 +2104,11 @@ impl TestBaseAccountSkuCapability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestBaseAccountSkuListResult {
     #[doc = "The list of Test Base Account SKUs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TestBaseAccountSku>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2056,7 +2180,11 @@ impl TestBaseAccountUsageData {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestBaseAccountUsageDataList {
     #[doc = "The list of Test Base Account usage data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TestBaseAccountUsageData>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2250,7 +2378,11 @@ pub mod test_result_analysis_summary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestResultListResult {
     #[doc = "The list of Test Results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TestResultResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2328,7 +2460,12 @@ pub struct TestResultProperties {
     #[serde(rename = "packageVersion", default, skip_serializing_if = "Option::is_none")]
     pub package_version: Option<String>,
     #[doc = "List of analysis summaries."]
-    #[serde(rename = "analysisSummaries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "analysisSummaries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub analysis_summaries: Vec<TestResultAnalysisSummary>,
 }
 impl TestResultProperties {
@@ -2406,7 +2543,11 @@ impl Serialize for TestStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestSummaryListResult {
     #[doc = "The list of Test Summaries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TestSummaryResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2520,7 +2661,11 @@ impl Serialize for TestType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestTypeListResult {
     #[doc = "The list of test types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TestTypeResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2594,7 +2739,12 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserObjectReceiverValue {
     #[doc = "user object ids."]
-    #[serde(rename = "userObjectIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userObjectIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_object_ids: Vec<String>,
 }
 impl UserObjectReceiverValue {
@@ -2645,7 +2795,11 @@ pub struct UtilizationResult {
     #[serde(rename = "lowerBound", default, skip_serializing_if = "Option::is_none")]
     pub lower_bound: Option<UtilizationBound>,
     #[doc = "Utilization data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub utilization: Vec<UtilizationEntry>,
 }
 impl UtilizationResult {
diff --git a/services/mgmt/testbase/src/package_2022_04_01_preview/models.rs b/services/mgmt/testbase/src/package_2022_04_01_preview/models.rs
index 890f37e345..451fdaf3bd 100644
--- a/services/mgmt/testbase/src/package_2022_04_01_preview/models.rs
+++ b/services/mgmt/testbase/src/package_2022_04_01_preview/models.rs
@@ -7,7 +7,11 @@ use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AnalysisResultListResult {
     #[doc = "The list of Analysis Results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AnalysisResultSingletonResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -115,7 +119,11 @@ pub mod analysis_result_singleton_resource_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOsListResult {
     #[doc = "The list of available OSs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableOsResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -232,7 +240,12 @@ impl BillingHubFreeHourIncrementEntry {
 pub struct BillingHubGetFreeHourBalanceResponse {
     #[serde(rename = "totalRemainingFreeHours", default, skip_serializing_if = "Option::is_none")]
     pub total_remaining_free_hours: Option<f64>,
-    #[serde(rename = "incrementEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "incrementEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub increment_entries: Vec<BillingHubFreeHourIncrementEntry>,
 }
 impl BillingHubGetFreeHourBalanceResponse {
@@ -269,7 +282,12 @@ pub struct BillingHubGetUsageResponse {
     pub total_used_billable_hours: Option<f64>,
     #[serde(rename = "totalCharges", default, skip_serializing_if = "Option::is_none")]
     pub total_charges: Option<f64>,
-    #[serde(rename = "packageUsageEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "packageUsageEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub package_usage_entries: Vec<BillingHubPackageUsage>,
     #[serde(rename = "nextRequest", default, skip_serializing_if = "Option::is_none")]
     pub next_request: Option<BillingHubGetUsageRequest>,
@@ -293,7 +311,12 @@ pub struct BillingHubPackageUsage {
     pub total_used_billable_hours: Option<f64>,
     #[serde(rename = "totalCharges", default, skip_serializing_if = "Option::is_none")]
     pub total_charges: Option<f64>,
-    #[serde(rename = "usageEntriesGroupedByUpdateType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "usageEntriesGroupedByUpdateType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub usage_entries_grouped_by_update_type: Vec<BillingHubUsageGroupedByUpdateType>,
 }
 impl BillingHubPackageUsage {
@@ -315,7 +338,12 @@ pub struct BillingHubUsage {
     pub total_used_billable_hours: Option<f64>,
     #[serde(rename = "totalCharges", default, skip_serializing_if = "Option::is_none")]
     pub total_charges: Option<f64>,
-    #[serde(rename = "usageGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "usageGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub usage_groups: Vec<BillingHubUsageGroup>,
 }
 impl BillingHubUsage {
@@ -345,7 +373,12 @@ pub struct BillingHubUsageGroup {
     pub test_type: Option<String>,
     #[serde(rename = "productFamily", default, skip_serializing_if = "Option::is_none")]
     pub product_family: Option<String>,
-    #[serde(rename = "executionUsageDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "executionUsageDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub execution_usage_details: Vec<BillingHubExecutionUsageDetail>,
 }
 impl BillingHubUsageGroup {
@@ -363,7 +396,12 @@ pub struct BillingHubUsageGroupedByUpdateType {
     pub total_used_billable_hours: Option<f64>,
     #[serde(rename = "totalCharges", default, skip_serializing_if = "Option::is_none")]
     pub total_charges: Option<f64>,
-    #[serde(rename = "usageGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "usageGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub usage_groups: Vec<BillingHubUsageGroup>,
 }
 impl BillingHubUsageGroupedByUpdateType {
@@ -377,7 +415,12 @@ pub struct CpuRegressionResultSingletonResourceProperties {
     #[serde(flatten)]
     pub analysis_result_singleton_resource_properties: AnalysisResultSingletonResourceProperties,
     #[doc = "The result array data."]
-    #[serde(rename = "cpuRegressionResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cpuRegressionResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cpu_regression_results: Vec<RegressionResult>,
 }
 impl CpuRegressionResultSingletonResourceProperties {
@@ -394,7 +437,12 @@ pub struct CpuUtilizationResultSingletonResourceProperties {
     #[serde(flatten)]
     pub analysis_result_singleton_resource_properties: AnalysisResultSingletonResourceProperties,
     #[doc = "The result array data."]
-    #[serde(rename = "cpuUtilizationResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cpuUtilizationResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cpu_utilization_results: Vec<UtilizationResult>,
 }
 impl CpuUtilizationResultSingletonResourceProperties {
@@ -599,7 +647,11 @@ pub mod command {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomerEventListResult {
     #[doc = "The list of Test Base Customer Events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomerEventResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -651,7 +703,12 @@ impl CustomerEventResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DistributionGroupListReceiverValue {
     #[doc = "The list of distribution groups."]
-    #[serde(rename = "distributionGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "distributionGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub distribution_groups: Vec<String>,
 }
 impl DistributionGroupListReceiverValue {
@@ -678,7 +735,11 @@ impl DownloadUrlResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EmailEventListResult {
     #[doc = "The list of email events."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EmailEventResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -743,7 +804,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -773,7 +838,11 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FavoriteProcessListResult {
     #[doc = "The list of favorite processes for a package."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FavoriteProcessResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -838,7 +907,11 @@ impl FileUploadUrlResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FlightingRingListResult {
     #[doc = "The list of flighting rings."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FlightingRingResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -970,7 +1043,12 @@ pub struct MemoryRegressionResultSingletonResourceProperties {
     #[serde(flatten)]
     pub analysis_result_singleton_resource_properties: AnalysisResultSingletonResourceProperties,
     #[doc = "The result array data."]
-    #[serde(rename = "memoryRegressionResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "memoryRegressionResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub memory_regression_results: Vec<RegressionResult>,
 }
 impl MemoryRegressionResultSingletonResourceProperties {
@@ -987,7 +1065,12 @@ pub struct MemoryUtilizationResultSingletonResourceProperties {
     #[serde(flatten)]
     pub analysis_result_singleton_resource_properties: AnalysisResultSingletonResourceProperties,
     #[doc = "The result array data."]
-    #[serde(rename = "memoryUtilizationResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "memoryUtilizationResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub memory_utilization_results: Vec<UtilizationResult>,
 }
 impl MemoryUtilizationResultSingletonResourceProperties {
@@ -1035,7 +1118,11 @@ impl NotificationReceiverValue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OsUpdateListResult {
     #[doc = "The list of OS Updates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OsUpdateResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1197,7 +1284,12 @@ pub struct OsUpdatesTestSummary {
     #[serde(rename = "testRunTime", default, skip_serializing_if = "Option::is_none")]
     pub test_run_time: Option<String>,
     #[doc = "Detailed summary for each OS update"]
-    #[serde(rename = "osUpdateTestSummaries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "osUpdateTestSummaries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub os_update_test_summaries: Vec<OsUpdateTestSummary>,
 }
 impl OsUpdatesTestSummary {
@@ -1257,7 +1349,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Test Base resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1310,7 +1406,11 @@ impl PackageCheckNameAvailabilityParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PackageListResult {
     #[doc = "The list of Test Base Packages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PackageResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1339,7 +1439,12 @@ pub struct PackageProperties {
     #[doc = "Application version"]
     pub version: String,
     #[doc = "OOB, functional or both. Mapped to the data in 'tests' property."]
-    #[serde(rename = "testTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "testTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub test_types: Vec<TestType>,
     #[doc = "Specifies the target OSs of specific OS Update types."]
     #[serde(rename = "targetOSList")]
@@ -1360,7 +1465,12 @@ pub struct PackageProperties {
     #[serde(rename = "blobPath")]
     pub blob_path: String,
     #[doc = "The validation results. There's validation on package when it's created or updated."]
-    #[serde(rename = "validationResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validationResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validation_results: Vec<PackageValidationResult>,
     #[doc = "The detailed test information."]
     pub tests: Vec<Test>,
@@ -1544,7 +1654,12 @@ pub mod package_run_test_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PackageUpdateParameterProperties {
     #[doc = "Specifies the target OSs of specific OS Update types."]
-    #[serde(rename = "targetOSList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "targetOSList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub target_os_list: Vec<TargetOsInfo>,
     #[doc = "The flighting ring for feature update."]
     #[serde(rename = "flightingRing", default, skip_serializing_if = "Option::is_none")]
@@ -1556,7 +1671,11 @@ pub struct PackageUpdateParameterProperties {
     #[serde(rename = "blobPath", default, skip_serializing_if = "Option::is_none")]
     pub blob_path: Option<String>,
     #[doc = "The detailed test information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tests: Vec<Test>,
 }
 impl PackageUpdateParameterProperties {
@@ -1589,7 +1708,11 @@ pub struct PackageValidationResult {
     #[serde(rename = "isValid", default, skip_serializing_if = "Option::is_none")]
     pub is_valid: Option<bool>,
     #[doc = "Error information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<String>,
 }
 impl PackageValidationResult {
@@ -1734,7 +1857,12 @@ pub struct ReliabilityResultSingletonResourceProperties {
     #[serde(flatten)]
     pub analysis_result_singleton_resource_properties: AnalysisResultSingletonResourceProperties,
     #[doc = "The result array data."]
-    #[serde(rename = "reliabilityResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reliabilityResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reliability_results: Vec<ReliabilityResult>,
 }
 impl ReliabilityResultSingletonResourceProperties {
@@ -1799,7 +1927,12 @@ pub struct ScriptExecutionResultSingletonResourceProperties {
     #[serde(flatten)]
     pub analysis_result_singleton_resource_properties: AnalysisResultSingletonResourceProperties,
     #[doc = "The result array data."]
-    #[serde(rename = "scriptExecutionResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scriptExecutionResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub script_execution_results: Vec<ScriptExecutionResult>,
 }
 impl ScriptExecutionResultSingletonResourceProperties {
@@ -1958,7 +2091,12 @@ pub struct TargetOsInfo {
     #[serde(rename = "targetOSs")]
     pub target_o_ss: Vec<String>,
     #[doc = "Specifies the baseline OSs to be tested."]
-    #[serde(rename = "baselineOSs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "baselineOSs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub baseline_o_ss: Vec<String>,
 }
 impl TargetOsInfo {
@@ -2053,7 +2191,12 @@ pub struct TestAnalysisResult {
     #[serde(rename = "testAnalysisStatus", default, skip_serializing_if = "Option::is_none")]
     pub test_analysis_status: Option<test_analysis_result::TestAnalysisStatus>,
     #[doc = "The array of identified failures."]
-    #[serde(rename = "identifiedFailures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "identifiedFailures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identified_failures: Vec<IdentifiedFailure>,
 }
 impl TestAnalysisResult {
@@ -2126,7 +2269,11 @@ impl TestAnalysisResultSingletonResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestBaseAccountListResult {
     #[doc = "The list of Test Base Accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TestBaseAccountResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2196,10 +2343,18 @@ pub struct TestBaseAccountSku {
     #[doc = "The tier of this particular SKU."]
     pub tier: test_base_account_sku::Tier,
     #[doc = "The capabilities of a SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<TestBaseAccountSkuCapability>,
     #[doc = "The locations that the SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
 }
 impl TestBaseAccountSku {
@@ -2268,7 +2423,11 @@ impl TestBaseAccountSkuCapability {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestBaseAccountSkuListResult {
     #[doc = "The list of Test Base Account SKUs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TestBaseAccountSku>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2340,7 +2499,11 @@ impl TestBaseAccountUsageData {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestBaseAccountUsageDataList {
     #[doc = "The list of Test Base Account usage data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TestBaseAccountUsageData>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2546,7 +2709,11 @@ impl TestResultConsoleLogDownloadUrlParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestResultListResult {
     #[doc = "The list of Test Results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TestResultResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2630,7 +2797,12 @@ pub struct TestResultProperties {
     #[serde(rename = "packageVersion", default, skip_serializing_if = "Option::is_none")]
     pub package_version: Option<String>,
     #[doc = "List of analysis summaries."]
-    #[serde(rename = "analysisSummaries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "analysisSummaries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub analysis_summaries: Vec<TestResultAnalysisSummary>,
 }
 impl TestResultProperties {
@@ -2708,7 +2880,11 @@ impl Serialize for TestStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestSummaryListResult {
     #[doc = "The list of Test Summaries."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TestSummaryResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2825,7 +3001,11 @@ impl Serialize for TestType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestTypeListResult {
     #[doc = "The list of test types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TestTypeResource>,
     #[doc = "Link to the next set of results. Not empty if value contains incomplete list of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2899,7 +3079,12 @@ impl TrackedResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserObjectReceiverValue {
     #[doc = "user object ids."]
-    #[serde(rename = "userObjectIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userObjectIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_object_ids: Vec<String>,
 }
 impl UserObjectReceiverValue {
@@ -2950,7 +3135,11 @@ pub struct UtilizationResult {
     #[serde(rename = "lowerBound", default, skip_serializing_if = "Option::is_none")]
     pub lower_bound: Option<UtilizationBound>,
     #[doc = "Utilization data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub utilization: Vec<UtilizationEntry>,
 }
 impl UtilizationResult {
diff --git a/services/mgmt/timeseriesinsights/src/package_2017_11_15/models.rs b/services/mgmt/timeseriesinsights/src/package_2017_11_15/models.rs
index 32d2c82246..8e382719de 100644
--- a/services/mgmt/timeseriesinsights/src/package_2017_11_15/models.rs
+++ b/services/mgmt/timeseriesinsights/src/package_2017_11_15/models.rs
@@ -16,7 +16,11 @@ impl AccessPolicyCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessPolicyListResponse {
     #[doc = "Result of the List access policies operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessPolicyResource>,
 }
 impl AccessPolicyListResponse {
@@ -31,7 +35,11 @@ pub struct AccessPolicyMutableProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of roles the principal is assigned on the environment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
 }
 impl AccessPolicyMutableProperties {
@@ -61,7 +69,11 @@ pub struct AccessPolicyResourceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of roles the principal is assigned on the environment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
 }
 impl AccessPolicyResourceProperties {
@@ -122,7 +134,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Contains nested errors that are related to this error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -177,7 +193,12 @@ pub struct EnvironmentCreationProperties {
     #[serde(rename = "storageLimitExceededBehavior", default, skip_serializing_if = "Option::is_none")]
     pub storage_limit_exceeded_behavior: Option<environment_creation_properties::StorageLimitExceededBehavior>,
     #[doc = "The list of partition keys according to which the data in the environment will be ordered."]
-    #[serde(rename = "partitionKeyProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionKeyProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_key_properties: Vec<PartitionKeyProperty>,
 }
 impl EnvironmentCreationProperties {
@@ -202,7 +223,11 @@ pub mod environment_creation_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EnvironmentListResponse {
     #[doc = "Result of the List Environments operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnvironmentResource>,
 }
 impl EnvironmentListResponse {
@@ -220,7 +245,12 @@ pub struct EnvironmentMutableProperties {
     #[serde(rename = "storageLimitExceededBehavior", default, skip_serializing_if = "Option::is_none")]
     pub storage_limit_exceeded_behavior: Option<environment_mutable_properties::StorageLimitExceededBehavior>,
     #[doc = "The list of event properties which will be used to partition data in the environment."]
-    #[serde(rename = "partitionKeyProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionKeyProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_key_properties: Vec<PartitionKeyProperty>,
 }
 impl EnvironmentMutableProperties {
@@ -507,7 +537,11 @@ pub mod event_source_create_or_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventSourceListResponse {
     #[doc = "Result of the List EventSources operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventSourceResource>,
 }
 impl EventSourceListResponse {
@@ -796,7 +830,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Time Series Insights operations supported by the Microsoft.TimeSeriesInsights resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -951,7 +989,11 @@ pub mod reference_data_set_key_property {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReferenceDataSetListResponse {
     #[doc = "Result of the List Reference Data Sets operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReferenceDataSetResource>,
 }
 impl ReferenceDataSetListResponse {
diff --git a/services/mgmt/timeseriesinsights/src/package_2018_08_preview/models.rs b/services/mgmt/timeseriesinsights/src/package_2018_08_preview/models.rs
index daa5699bec..83fb2decc2 100644
--- a/services/mgmt/timeseriesinsights/src/package_2018_08_preview/models.rs
+++ b/services/mgmt/timeseriesinsights/src/package_2018_08_preview/models.rs
@@ -16,7 +16,11 @@ impl AccessPolicyCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessPolicyListResponse {
     #[doc = "Result of the List access policies operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessPolicyResource>,
 }
 impl AccessPolicyListResponse {
@@ -31,7 +35,11 @@ pub struct AccessPolicyMutableProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of roles the principal is assigned on the environment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
 }
 impl AccessPolicyMutableProperties {
@@ -61,7 +69,11 @@ pub struct AccessPolicyResourceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of roles the principal is assigned on the environment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
 }
 impl AccessPolicyResourceProperties {
@@ -122,7 +134,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Contains nested errors that are related to this error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -211,7 +227,11 @@ pub mod environment_create_or_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EnvironmentListResponse {
     #[doc = "Result of the List Environments operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnvironmentResource>,
 }
 impl EnvironmentListResponse {
@@ -520,7 +540,11 @@ pub mod event_source_create_or_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventSourceListResponse {
     #[doc = "Result of the List EventSources operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventSourceResource>,
 }
 impl EventSourceListResponse {
@@ -1024,7 +1048,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Time Series Insights operations supported by the Microsoft.TimeSeriesInsights resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1225,7 +1253,11 @@ pub mod reference_data_set_key_property {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReferenceDataSetListResponse {
     #[doc = "Result of the List Reference Data Sets operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReferenceDataSetResource>,
 }
 impl ReferenceDataSetListResponse {
@@ -1397,7 +1429,12 @@ pub struct StandardEnvironmentCreationProperties {
     #[serde(rename = "storageLimitExceededBehavior", default, skip_serializing_if = "Option::is_none")]
     pub storage_limit_exceeded_behavior: Option<standard_environment_creation_properties::StorageLimitExceededBehavior>,
     #[doc = "The list of event properties which will be used to partition data in the environment. Currently, only a single partition key property is supported."]
-    #[serde(rename = "partitionKeyProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionKeyProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_key_properties: Vec<TimeSeriesIdProperty>,
 }
 impl StandardEnvironmentCreationProperties {
diff --git a/services/mgmt/timeseriesinsights/src/package_2020_05_15/models.rs b/services/mgmt/timeseriesinsights/src/package_2020_05_15/models.rs
index b76f397dbc..134e2ce1e8 100644
--- a/services/mgmt/timeseriesinsights/src/package_2020_05_15/models.rs
+++ b/services/mgmt/timeseriesinsights/src/package_2020_05_15/models.rs
@@ -16,7 +16,11 @@ impl AccessPolicyCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessPolicyListResponse {
     #[doc = "Result of the List access policies operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessPolicyResource>,
 }
 impl AccessPolicyListResponse {
@@ -31,7 +35,11 @@ pub struct AccessPolicyMutableProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of roles the principal is assigned on the environment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
 }
 impl AccessPolicyMutableProperties {
@@ -61,7 +69,11 @@ pub struct AccessPolicyResourceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of roles the principal is assigned on the environment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
 }
 impl AccessPolicyResourceProperties {
@@ -128,7 +140,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Contains nested errors that are related to this error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -232,7 +248,11 @@ pub mod environment_create_or_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EnvironmentListResponse {
     #[doc = "Result of the List Environments operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnvironmentResource>,
 }
 impl EnvironmentListResponse {
@@ -592,7 +612,11 @@ pub mod event_source_create_or_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventSourceListResponse {
     #[doc = "Result of the List EventSources operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventSourceResource>,
 }
 impl EventSourceListResponse {
@@ -721,7 +745,12 @@ pub struct Gen1EnvironmentCreationProperties {
     #[serde(rename = "storageLimitExceededBehavior", default, skip_serializing_if = "Option::is_none")]
     pub storage_limit_exceeded_behavior: Option<gen1_environment_creation_properties::StorageLimitExceededBehavior>,
     #[doc = "The list of event properties which will be used to partition data in the environment. Currently, only a single partition key property is supported."]
-    #[serde(rename = "partitionKeyProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionKeyProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_key_properties: Vec<TimeSeriesIdProperty>,
 }
 impl Gen1EnvironmentCreationProperties {
@@ -1390,13 +1419,21 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Dimensions of blobs, including blob type and access tier."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Aggregation type could be Average."]
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Retention policies of a resource metric."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<MetricAvailability>,
     #[doc = "The category this metric specification belong to, could be Capacity."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1458,7 +1495,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Time Series Insights operations supported by the Microsoft.TimeSeriesInsights resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1671,7 +1712,11 @@ pub mod reference_data_set_key_property {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReferenceDataSetListResponse {
     #[doc = "Result of the List Reference Data Sets operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReferenceDataSetResource>,
 }
 impl ReferenceDataSetListResponse {
@@ -1761,10 +1806,20 @@ impl ResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "A list of Azure Monitoring log definitions."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
diff --git a/services/mgmt/timeseriesinsights/src/package_preview_2021_03/models.rs b/services/mgmt/timeseriesinsights/src/package_preview_2021_03/models.rs
index 52b75c2567..54da8bcd18 100644
--- a/services/mgmt/timeseriesinsights/src/package_preview_2021_03/models.rs
+++ b/services/mgmt/timeseriesinsights/src/package_preview_2021_03/models.rs
@@ -16,7 +16,11 @@ impl AccessPolicyCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessPolicyListResponse {
     #[doc = "Result of the List access policies operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessPolicyResource>,
 }
 impl AccessPolicyListResponse {
@@ -31,7 +35,11 @@ pub struct AccessPolicyMutableProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of roles the principal is assigned on the environment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
 }
 impl AccessPolicyMutableProperties {
@@ -61,7 +69,11 @@ pub struct AccessPolicyResourceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of roles the principal is assigned on the environment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
 }
 impl AccessPolicyResourceProperties {
@@ -128,7 +140,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Contains nested errors that are related to this error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -232,7 +248,11 @@ pub mod environment_create_or_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EnvironmentListResponse {
     #[doc = "Result of the List Environments operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnvironmentResource>,
 }
 impl EnvironmentListResponse {
@@ -592,7 +612,11 @@ pub mod event_source_create_or_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventSourceListResponse {
     #[doc = "Result of the List EventSources operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventSourceResource>,
 }
 impl EventSourceListResponse {
@@ -721,7 +745,12 @@ pub struct Gen1EnvironmentCreationProperties {
     #[serde(rename = "storageLimitExceededBehavior", default, skip_serializing_if = "Option::is_none")]
     pub storage_limit_exceeded_behavior: Option<gen1_environment_creation_properties::StorageLimitExceededBehavior>,
     #[doc = "The list of event properties which will be used to partition data in the environment. Currently, only a single partition key property is supported."]
-    #[serde(rename = "partitionKeyProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionKeyProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_key_properties: Vec<TimeSeriesIdProperty>,
 }
 impl Gen1EnvironmentCreationProperties {
@@ -916,7 +945,12 @@ pub struct Gen2EnvironmentCreationProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<gen2_environment_creation_properties::PublicNetworkAccess>,
     #[doc = "The list of private endpoint connections to the environment."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl Gen2EnvironmentCreationProperties {
@@ -1026,7 +1060,12 @@ pub struct Gen2EnvironmentResourceProperties {
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
     pub public_network_access: Option<gen2_environment_resource_properties::PublicNetworkAccess>,
     #[doc = "The list of private endpoint connections to the environment."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl Gen2EnvironmentResourceProperties {
@@ -1500,13 +1539,21 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Dimensions of blobs, including blob type and access tier."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Aggregation type could be Average."]
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Retention policies of a resource metric."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<MetricAvailability>,
     #[doc = "The category this metric specification belong to, could be Capacity."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1568,7 +1615,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Time Series Insights operations supported by the Microsoft.TimeSeriesInsights resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1630,7 +1681,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -1763,7 +1818,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl azure_core::Continuable for PrivateLinkResourceListResult {
@@ -1784,10 +1843,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -1997,7 +2066,11 @@ pub mod reference_data_set_key_property {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReferenceDataSetListResponse {
     #[doc = "Result of the List Reference Data Sets operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReferenceDataSetResource>,
 }
 impl ReferenceDataSetListResponse {
@@ -2087,10 +2160,20 @@ impl ResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "A list of Azure Monitoring log definitions."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
diff --git a/services/mgmt/timeseriesinsights/src/package_preview_2021_06/models.rs b/services/mgmt/timeseriesinsights/src/package_preview_2021_06/models.rs
index fc158eb4c0..98e647758e 100644
--- a/services/mgmt/timeseriesinsights/src/package_preview_2021_06/models.rs
+++ b/services/mgmt/timeseriesinsights/src/package_preview_2021_06/models.rs
@@ -16,7 +16,11 @@ impl AccessPolicyCreateOrUpdateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessPolicyListResponse {
     #[doc = "Result of the List access policies operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessPolicyResource>,
 }
 impl AccessPolicyListResponse {
@@ -31,7 +35,11 @@ pub struct AccessPolicyMutableProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of roles the principal is assigned on the environment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
 }
 impl AccessPolicyMutableProperties {
@@ -61,7 +69,11 @@ pub struct AccessPolicyResourceProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of roles the principal is assigned on the environment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub roles: Vec<String>,
 }
 impl AccessPolicyResourceProperties {
@@ -128,7 +140,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Contains nested errors that are related to this error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -232,7 +248,11 @@ pub mod environment_create_or_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EnvironmentListResponse {
     #[doc = "Result of the List Environments operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EnvironmentResource>,
 }
 impl EnvironmentListResponse {
@@ -595,7 +615,11 @@ pub mod event_source_create_or_update_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventSourceListResponse {
     #[doc = "Result of the List EventSources operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventSourceResource>,
 }
 impl EventSourceListResponse {
@@ -724,7 +748,12 @@ pub struct Gen1EnvironmentCreationProperties {
     #[serde(rename = "storageLimitExceededBehavior", default, skip_serializing_if = "Option::is_none")]
     pub storage_limit_exceeded_behavior: Option<gen1_environment_creation_properties::StorageLimitExceededBehavior>,
     #[doc = "The list of event properties which will be used to partition data in the environment. Currently, only a single partition key property is supported."]
-    #[serde(rename = "partitionKeyProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionKeyProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_key_properties: Vec<TimeSeriesIdProperty>,
 }
 impl Gen1EnvironmentCreationProperties {
@@ -1393,13 +1422,21 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub unit: Option<String>,
     #[doc = "Dimensions of blobs, including blob type and access tier."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[doc = "Aggregation type could be Average."]
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Retention policies of a resource metric."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<MetricAvailability>,
     #[doc = "The category this metric specification belong to, could be Capacity."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1461,7 +1498,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Time Series Insights operations supported by the Microsoft.TimeSeriesInsights resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1674,7 +1715,11 @@ pub mod reference_data_set_key_property {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReferenceDataSetListResponse {
     #[doc = "Result of the List Reference Data Sets operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ReferenceDataSetResource>,
 }
 impl ReferenceDataSetListResponse {
@@ -1764,10 +1809,20 @@ impl ResourceProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Metric specifications of operation."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "A list of Azure Monitoring log definitions."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
diff --git a/services/mgmt/trafficmanager/src/package_2017_09_preview/models.rs b/services/mgmt/trafficmanager/src/package_2017_09_preview/models.rs
index a48cd19486..7f0df1c530 100644
--- a/services/mgmt/trafficmanager/src/package_2017_09_preview/models.rs
+++ b/services/mgmt/trafficmanager/src/package_2017_09_preview/models.rs
@@ -49,7 +49,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -129,7 +133,12 @@ pub struct EndpointProperties {
     #[serde(rename = "minChildEndpoints", default, skip_serializing_if = "Option::is_none")]
     pub min_child_endpoints: Option<i64>,
     #[doc = "The list of countries/regions mapped to this endpoint when using the ‘Geographic’ traffic routing method. Please consult Traffic Manager Geographic documentation for a full list of accepted values."]
-    #[serde(rename = "geoMapping", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "geoMapping",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub geo_mapping: Vec<String>,
 }
 impl EndpointProperties {
@@ -273,10 +282,19 @@ pub struct HeatMapProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The endpoints used in this HeatMap calculation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<HeatMapEndpoint>,
     #[doc = "The traffic flows produced in this HeatMap calculation."]
-    #[serde(rename = "trafficFlows", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trafficFlows",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traffic_flows: Vec<TrafficFlow>,
 }
 impl HeatMapProperties {
@@ -420,7 +438,11 @@ impl Profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileListResult {
     #[doc = "Gets the list of Traffic manager profiles."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Profile>,
 }
 impl azure_core::Continuable for ProfileListResult {
@@ -450,7 +472,11 @@ pub struct ProfileProperties {
     #[serde(rename = "monitorConfig", default, skip_serializing_if = "Option::is_none")]
     pub monitor_config: Option<MonitorConfig>,
     #[doc = "The list of endpoints in the Traffic Manager profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<Endpoint>,
 }
 impl ProfileProperties {
@@ -582,7 +608,11 @@ pub struct Region {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of Regions grouped under this Region in the Geographic Hierarchy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<Region>,
 }
 impl Region {
@@ -638,7 +668,12 @@ pub struct TrafficFlow {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub longitude: Option<f64>,
     #[doc = "The query experiences produced in this HeatMap calculation."]
-    #[serde(rename = "queryExperiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "queryExperiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub query_experiences: Vec<QueryExperience>,
 }
 impl TrafficFlow {
diff --git a/services/mgmt/trafficmanager/src/package_2018_02/models.rs b/services/mgmt/trafficmanager/src/package_2018_02/models.rs
index b8f74c5891..3098c76f24 100644
--- a/services/mgmt/trafficmanager/src/package_2018_02/models.rs
+++ b/services/mgmt/trafficmanager/src/package_2018_02/models.rs
@@ -49,7 +49,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -129,7 +133,12 @@ pub struct EndpointProperties {
     #[serde(rename = "minChildEndpoints", default, skip_serializing_if = "Option::is_none")]
     pub min_child_endpoints: Option<i64>,
     #[doc = "The list of countries/regions mapped to this endpoint when using the ‘Geographic’ traffic routing method. Please consult Traffic Manager Geographic documentation for a full list of accepted values."]
-    #[serde(rename = "geoMapping", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "geoMapping",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub geo_mapping: Vec<String>,
 }
 impl EndpointProperties {
@@ -273,10 +282,19 @@ pub struct HeatMapProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The endpoints used in this HeatMap calculation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<HeatMapEndpoint>,
     #[doc = "The traffic flows produced in this HeatMap calculation."]
-    #[serde(rename = "trafficFlows", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trafficFlows",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traffic_flows: Vec<TrafficFlow>,
 }
 impl HeatMapProperties {
@@ -420,7 +438,11 @@ impl Profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileListResult {
     #[doc = "Gets the list of Traffic manager profiles."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Profile>,
 }
 impl azure_core::Continuable for ProfileListResult {
@@ -450,7 +472,11 @@ pub struct ProfileProperties {
     #[serde(rename = "monitorConfig", default, skip_serializing_if = "Option::is_none")]
     pub monitor_config: Option<MonitorConfig>,
     #[doc = "The list of endpoints in the Traffic Manager profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<Endpoint>,
     #[doc = "Indicates whether Traffic View is 'Enabled' or 'Disabled' for the Traffic Manager profile. Null, indicates 'Disabled'. Enabling this feature will increase the cost of the Traffic Manage profile."]
     #[serde(rename = "trafficViewEnrollmentStatus", default, skip_serializing_if = "Option::is_none")]
@@ -622,7 +648,11 @@ pub struct Region {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of Regions grouped under this Region in the Geographic Hierarchy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<Region>,
 }
 impl Region {
@@ -678,7 +708,12 @@ pub struct TrafficFlow {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub longitude: Option<f64>,
     #[doc = "The query experiences produced in this HeatMap calculation."]
-    #[serde(rename = "queryExperiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "queryExperiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub query_experiences: Vec<QueryExperience>,
 }
 impl TrafficFlow {
diff --git a/services/mgmt/trafficmanager/src/package_2018_03/models.rs b/services/mgmt/trafficmanager/src/package_2018_03/models.rs
index 5cea02b5b1..0745141cb2 100644
--- a/services/mgmt/trafficmanager/src/package_2018_03/models.rs
+++ b/services/mgmt/trafficmanager/src/package_2018_03/models.rs
@@ -49,7 +49,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -129,10 +133,20 @@ pub struct EndpointProperties {
     #[serde(rename = "minChildEndpoints", default, skip_serializing_if = "Option::is_none")]
     pub min_child_endpoints: Option<i64>,
     #[doc = "The list of countries/regions mapped to this endpoint when using the ‘Geographic’ traffic routing method. Please consult Traffic Manager Geographic documentation for a full list of accepted values."]
-    #[serde(rename = "geoMapping", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "geoMapping",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub geo_mapping: Vec<String>,
     #[doc = "List of custom headers."]
-    #[serde(rename = "customHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_headers: Vec<serde_json::Value>,
 }
 impl EndpointProperties {
@@ -276,10 +290,19 @@ pub struct HeatMapProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The endpoints used in this HeatMap calculation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<HeatMapEndpoint>,
     #[doc = "The traffic flows produced in this HeatMap calculation."]
-    #[serde(rename = "trafficFlows", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trafficFlows",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traffic_flows: Vec<TrafficFlow>,
 }
 impl HeatMapProperties {
@@ -312,10 +335,20 @@ pub struct MonitorConfig {
     #[serde(rename = "toleratedNumberOfFailures", default, skip_serializing_if = "Option::is_none")]
     pub tolerated_number_of_failures: Option<i64>,
     #[doc = "List of custom headers."]
-    #[serde(rename = "customHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_headers: Vec<serde_json::Value>,
     #[doc = "List of expected status code ranges."]
-    #[serde(rename = "expectedStatusCodeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "expectedStatusCodeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub expected_status_code_ranges: Vec<serde_json::Value>,
 }
 impl MonitorConfig {
@@ -429,7 +462,11 @@ impl Profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileListResult {
     #[doc = "Gets the list of Traffic manager profiles."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Profile>,
 }
 impl azure_core::Continuable for ProfileListResult {
@@ -459,7 +496,11 @@ pub struct ProfileProperties {
     #[serde(rename = "monitorConfig", default, skip_serializing_if = "Option::is_none")]
     pub monitor_config: Option<MonitorConfig>,
     #[doc = "The list of endpoints in the Traffic Manager profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<Endpoint>,
     #[doc = "Indicates whether Traffic View is 'Enabled' or 'Disabled' for the Traffic Manager profile. Null, indicates 'Disabled'. Enabling this feature will increase the cost of the Traffic Manage profile."]
     #[serde(rename = "trafficViewEnrollmentStatus", default, skip_serializing_if = "Option::is_none")]
@@ -631,7 +672,11 @@ pub struct Region {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of Regions grouped under this Region in the Geographic Hierarchy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<Region>,
 }
 impl Region {
@@ -687,7 +732,12 @@ pub struct TrafficFlow {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub longitude: Option<f64>,
     #[doc = "The query experiences produced in this HeatMap calculation."]
-    #[serde(rename = "queryExperiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "queryExperiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub query_experiences: Vec<QueryExperience>,
 }
 impl TrafficFlow {
diff --git a/services/mgmt/trafficmanager/src/package_2018_04/models.rs b/services/mgmt/trafficmanager/src/package_2018_04/models.rs
index 170a708a7c..ed16c73906 100644
--- a/services/mgmt/trafficmanager/src/package_2018_04/models.rs
+++ b/services/mgmt/trafficmanager/src/package_2018_04/models.rs
@@ -49,7 +49,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -129,13 +133,27 @@ pub struct EndpointProperties {
     #[serde(rename = "minChildEndpoints", default, skip_serializing_if = "Option::is_none")]
     pub min_child_endpoints: Option<i64>,
     #[doc = "The list of countries/regions mapped to this endpoint when using the 'Geographic' traffic routing method. Please consult Traffic Manager Geographic documentation for a full list of accepted values."]
-    #[serde(rename = "geoMapping", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "geoMapping",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub geo_mapping: Vec<String>,
     #[doc = "The list of subnets, IP addresses, and/or address ranges mapped to this endpoint when using the 'Subnet' traffic routing method. An empty list will match all ranges not covered by other endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<serde_json::Value>,
     #[doc = "List of custom headers."]
-    #[serde(rename = "customHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_headers: Vec<serde_json::Value>,
 }
 impl EndpointProperties {
@@ -279,10 +297,19 @@ pub struct HeatMapProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The endpoints used in this HeatMap calculation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<HeatMapEndpoint>,
     #[doc = "The traffic flows produced in this HeatMap calculation."]
-    #[serde(rename = "trafficFlows", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trafficFlows",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traffic_flows: Vec<TrafficFlow>,
 }
 impl HeatMapProperties {
@@ -315,10 +342,20 @@ pub struct MonitorConfig {
     #[serde(rename = "toleratedNumberOfFailures", default, skip_serializing_if = "Option::is_none")]
     pub tolerated_number_of_failures: Option<i64>,
     #[doc = "List of custom headers."]
-    #[serde(rename = "customHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_headers: Vec<serde_json::Value>,
     #[doc = "List of expected status code ranges."]
-    #[serde(rename = "expectedStatusCodeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "expectedStatusCodeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub expected_status_code_ranges: Vec<serde_json::Value>,
 }
 impl MonitorConfig {
@@ -432,7 +469,11 @@ impl Profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileListResult {
     #[doc = "Gets the list of Traffic manager profiles."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Profile>,
 }
 impl azure_core::Continuable for ProfileListResult {
@@ -462,7 +503,11 @@ pub struct ProfileProperties {
     #[serde(rename = "monitorConfig", default, skip_serializing_if = "Option::is_none")]
     pub monitor_config: Option<MonitorConfig>,
     #[doc = "The list of endpoints in the Traffic Manager profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<Endpoint>,
     #[doc = "Indicates whether Traffic View is 'Enabled' or 'Disabled' for the Traffic Manager profile. Null, indicates 'Disabled'. Enabling this feature will increase the cost of the Traffic Manage profile."]
     #[serde(rename = "trafficViewEnrollmentStatus", default, skip_serializing_if = "Option::is_none")]
@@ -641,7 +686,11 @@ pub struct Region {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of Regions grouped under this Region in the Geographic Hierarchy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<Region>,
 }
 impl Region {
@@ -697,7 +746,12 @@ pub struct TrafficFlow {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub longitude: Option<f64>,
     #[doc = "The query experiences produced in this HeatMap calculation."]
-    #[serde(rename = "queryExperiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "queryExperiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub query_experiences: Vec<QueryExperience>,
 }
 impl TrafficFlow {
diff --git a/services/mgmt/trafficmanager/src/package_2018_08/models.rs b/services/mgmt/trafficmanager/src/package_2018_08/models.rs
index 1e2455ce7a..90713b9fba 100644
--- a/services/mgmt/trafficmanager/src/package_2018_08/models.rs
+++ b/services/mgmt/trafficmanager/src/package_2018_08/models.rs
@@ -90,7 +90,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
@@ -176,13 +180,27 @@ pub struct EndpointProperties {
     #[serde(rename = "minChildEndpointsIPv6", default, skip_serializing_if = "Option::is_none")]
     pub min_child_endpoints_i_pv6: Option<i64>,
     #[doc = "The list of countries/regions mapped to this endpoint when using the 'Geographic' traffic routing method. Please consult Traffic Manager Geographic documentation for a full list of accepted values."]
-    #[serde(rename = "geoMapping", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "geoMapping",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub geo_mapping: Vec<String>,
     #[doc = "The list of subnets, IP addresses, and/or address ranges mapped to this endpoint when using the 'Subnet' traffic routing method. An empty list will match all ranges not covered by other endpoints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<serde_json::Value>,
     #[doc = "List of custom headers."]
-    #[serde(rename = "customHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_headers: Vec<serde_json::Value>,
 }
 impl EndpointProperties {
@@ -326,10 +344,19 @@ pub struct HeatMapProperties {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The endpoints used in this HeatMap calculation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<HeatMapEndpoint>,
     #[doc = "The traffic flows produced in this HeatMap calculation."]
-    #[serde(rename = "trafficFlows", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "trafficFlows",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traffic_flows: Vec<TrafficFlow>,
 }
 impl HeatMapProperties {
@@ -362,10 +389,20 @@ pub struct MonitorConfig {
     #[serde(rename = "toleratedNumberOfFailures", default, skip_serializing_if = "Option::is_none")]
     pub tolerated_number_of_failures: Option<i64>,
     #[doc = "List of custom headers."]
-    #[serde(rename = "customHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_headers: Vec<serde_json::Value>,
     #[doc = "List of expected status code ranges."]
-    #[serde(rename = "expectedStatusCodeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "expectedStatusCodeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub expected_status_code_ranges: Vec<serde_json::Value>,
 }
 impl MonitorConfig {
@@ -479,7 +516,11 @@ impl Profile {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProfileListResult {
     #[doc = "Gets the list of Traffic manager profiles."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Profile>,
 }
 impl azure_core::Continuable for ProfileListResult {
@@ -509,13 +550,22 @@ pub struct ProfileProperties {
     #[serde(rename = "monitorConfig", default, skip_serializing_if = "Option::is_none")]
     pub monitor_config: Option<MonitorConfig>,
     #[doc = "The list of endpoints in the Traffic Manager profile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<Endpoint>,
     #[doc = "Indicates whether Traffic View is 'Enabled' or 'Disabled' for the Traffic Manager profile. Null, indicates 'Disabled'. Enabling this feature will increase the cost of the Traffic Manage profile."]
     #[serde(rename = "trafficViewEnrollmentStatus", default, skip_serializing_if = "Option::is_none")]
     pub traffic_view_enrollment_status: Option<profile_properties::TrafficViewEnrollmentStatus>,
     #[doc = "The list of allowed endpoint record types."]
-    #[serde(rename = "allowedEndpointRecordTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedEndpointRecordTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_endpoint_record_types: Vec<AllowedEndpointRecordType>,
     #[doc = "Maximum number of endpoints to be returned for MultiValue routing type."]
     #[serde(rename = "maxReturn", default, skip_serializing_if = "Option::is_none")]
@@ -691,7 +741,11 @@ pub struct Region {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The list of Regions grouped under this Region in the Geographic Hierarchy."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub regions: Vec<Region>,
 }
 impl Region {
@@ -747,7 +801,12 @@ pub struct TrafficFlow {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub longitude: Option<f64>,
     #[doc = "The query experiences produced in this HeatMap calculation."]
-    #[serde(rename = "queryExperiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "queryExperiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub query_experiences: Vec<QueryExperience>,
 }
 impl TrafficFlow {
diff --git a/services/mgmt/vi/src/package_2021_10_27_preview/models.rs b/services/mgmt/vi/src/package_2021_10_27_preview/models.rs
index 795e03d191..886fffd5fc 100644
--- a/services/mgmt/vi/src/package_2021_10_27_preview/models.rs
+++ b/services/mgmt/vi/src/package_2021_10_27_preview/models.rs
@@ -97,7 +97,11 @@ pub mod account_check_name_availability_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountList {
     #[doc = "List of accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -404,7 +408,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -680,7 +688,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Resource Provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -774,7 +786,11 @@ impl UserAssignedIdentity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserClassicAccountList {
     #[doc = "List of classic account names and their location."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClassicAccountSlim>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/vi/src/package_2021_11_10_preview/models.rs b/services/mgmt/vi/src/package_2021_11_10_preview/models.rs
index 2b6246a9aa..49afc9f6d8 100644
--- a/services/mgmt/vi/src/package_2021_11_10_preview/models.rs
+++ b/services/mgmt/vi/src/package_2021_11_10_preview/models.rs
@@ -97,7 +97,11 @@ pub mod account_check_name_availability_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountList {
     #[doc = "List of accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -419,7 +423,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -695,7 +703,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Resource Provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -789,7 +801,11 @@ impl UserAssignedIdentity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserClassicAccountList {
     #[doc = "List of classic account names and their location."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClassicAccountSlim>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/vi/src/package_2022_04_13_preview/models.rs b/services/mgmt/vi/src/package_2022_04_13_preview/models.rs
index 8789d3956a..a54b300785 100644
--- a/services/mgmt/vi/src/package_2022_04_13_preview/models.rs
+++ b/services/mgmt/vi/src/package_2022_04_13_preview/models.rs
@@ -97,7 +97,11 @@ pub mod account_check_name_availability_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountList {
     #[doc = "List of accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -425,7 +429,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -701,7 +709,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Resource Provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -795,7 +807,11 @@ impl UserAssignedIdentity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserClassicAccountList {
     #[doc = "List of classic account names and their location."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClassicAccountSlim>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/vi/src/package_2022_07_20_preview/models.rs b/services/mgmt/vi/src/package_2022_07_20_preview/models.rs
index 8b8f91e0fa..a81c3504b2 100644
--- a/services/mgmt/vi/src/package_2022_07_20_preview/models.rs
+++ b/services/mgmt/vi/src/package_2022_07_20_preview/models.rs
@@ -97,7 +97,11 @@ pub mod account_check_name_availability_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountList {
     #[doc = "List of accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -425,7 +429,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -764,7 +772,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Resource Provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -858,7 +870,11 @@ impl UserAssignedIdentity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserClassicAccountList {
     #[doc = "List of classic account names and their location."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClassicAccountSlim>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/vi/src/package_2022_08_01/models.rs b/services/mgmt/vi/src/package_2022_08_01/models.rs
index 8789d3956a..a54b300785 100644
--- a/services/mgmt/vi/src/package_2022_08_01/models.rs
+++ b/services/mgmt/vi/src/package_2022_08_01/models.rs
@@ -97,7 +97,11 @@ pub mod account_check_name_availability_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountList {
     #[doc = "List of accounts and their properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Account>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -425,7 +429,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -701,7 +709,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the Resource Provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -795,7 +807,11 @@ impl UserAssignedIdentity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserClassicAccountList {
     #[doc = "List of classic account names and their location."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClassicAccountSlim>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/videoanalyzer/src/package_2021_05_01_preview/models.rs b/services/mgmt/videoanalyzer/src/package_2021_05_01_preview/models.rs
index dc1cc2871f..57b6e47ad5 100644
--- a/services/mgmt/videoanalyzer/src/package_2021_05_01_preview/models.rs
+++ b/services/mgmt/videoanalyzer/src/package_2021_05_01_preview/models.rs
@@ -24,7 +24,11 @@ impl AccessPolicyEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessPolicyEntityCollection {
     #[doc = "A collection of AccessPolicyEntity items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessPolicyEntity>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -328,7 +332,11 @@ impl EdgeModuleEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EdgeModuleEntityCollection {
     #[doc = "A collection of EdgeModuleEntity items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EdgeModuleEntity>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -453,10 +461,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -488,16 +505,32 @@ pub struct JwtAuthentication {
     #[serde(flatten)]
     pub authentication_base: AuthenticationBase,
     #[doc = "List of expected token issuers. Token issuer is valid if it matches at least one of the given values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issuers: Vec<String>,
     #[doc = "List of expected token audiences. Token audience is valid if it matches at least one of the given values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audiences: Vec<String>,
     #[doc = "List of additional token claims to be validated. Token must contains all claims and respective values for it to be valid."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub claims: Vec<TokenClaim>,
     #[doc = "List of keys which can be used to validate access tokens. Having multiple keys allow for seamless key rotation of the token signing key. Token signature must match exactly one key."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<TokenKey>,
 }
 impl JwtAuthentication {
@@ -599,10 +632,19 @@ pub struct MetricSpecification {
     #[serde(rename = "lockAggregationType", default, skip_serializing_if = "Option::is_none")]
     pub lock_aggregation_type: Option<metric_specification::LockAggregationType>,
     #[doc = "Supported aggregation types."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The metric dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Indicates whether regional MDM account is enabled."]
     #[serde(rename = "enableRegionalMdmAccount", default, skip_serializing_if = "Option::is_none")]
@@ -614,7 +656,12 @@ pub struct MetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "The supported time grain types."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
 }
 impl MetricSpecification {
@@ -817,7 +864,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationCollection {
     #[doc = "A collection of Operation items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationCollection {
@@ -965,10 +1016,20 @@ pub mod rsa_token_key {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "List of log specifications."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "List of metric specifications."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -1104,7 +1165,11 @@ impl VideoAnalyzer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VideoAnalyzerCollection {
     #[doc = "A collection of VideoAnalyzer items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VideoAnalyzer>,
 }
 impl VideoAnalyzerCollection {
@@ -1146,10 +1211,19 @@ impl VideoAnalyzerProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VideoAnalyzerPropertiesUpdate {
     #[doc = "The storage accounts for this resource."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<StorageAccount>,
     #[doc = "The list of endpoints associated with this resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<Endpoint>,
     #[doc = "Defines how the Video Analyzer account is (optionally) encrypted."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1199,7 +1273,11 @@ impl VideoEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VideoEntityCollection {
     #[doc = "A collection of VideoEntity items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VideoEntity>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/videoanalyzer/src/package_preview_2021_11/models.rs b/services/mgmt/videoanalyzer/src/package_preview_2021_11/models.rs
index 665b150769..2acdfab0fe 100644
--- a/services/mgmt/videoanalyzer/src/package_preview_2021_11/models.rs
+++ b/services/mgmt/videoanalyzer/src/package_preview_2021_11/models.rs
@@ -21,7 +21,11 @@ impl AccessPolicyEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccessPolicyEntityCollection {
     #[doc = "A collection of AccessPolicyEntity items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccessPolicyEntity>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -372,7 +376,11 @@ impl EdgeModuleEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EdgeModuleEntityCollection {
     #[doc = "A collection of EdgeModuleEntity items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EdgeModuleEntity>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -631,10 +639,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -738,16 +755,32 @@ pub struct JwtAuthentication {
     #[serde(flatten)]
     pub authentication_base: AuthenticationBase,
     #[doc = "List of expected token issuers. Token issuer is valid if it matches at least one of the given values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub issuers: Vec<String>,
     #[doc = "List of expected token audiences. Token audience is valid if it matches at least one of the given values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub audiences: Vec<String>,
     #[doc = "List of additional token claims to be validated. Token must contains all claims and respective values for it to be valid."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub claims: Vec<TokenClaim>,
     #[doc = "List of keys which can be used to validate access tokens. Having multiple keys allow for seamless key rotation of the token signing key. Token signature must match exactly one key."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<TokenKey>,
 }
 impl JwtAuthentication {
@@ -809,7 +842,11 @@ impl LivePipeline {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LivePipelineCollection {
     #[doc = "A collection of LivePipeline items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LivePipeline>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -860,7 +897,11 @@ pub struct LivePipelineProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<live_pipeline_properties::State>,
     #[doc = "List of the instance level parameter values for the user-defined topology parameters. A pipeline can only define or override parameters values for parameters which have been declared in the referenced topology. Topology parameters without a default value must be defined. Topology parameters with a default value can be optionally be overridden."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ParameterDefinition>,
 }
 impl LivePipelineProperties {
@@ -934,7 +975,11 @@ pub struct LivePipelinePropertiesUpdate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<live_pipeline_properties_update::State>,
     #[doc = "List of the instance level parameter values for the user-defined topology parameters. A pipeline can only define or override parameters values for parameters which have been declared in the referenced topology. Topology parameters without a default value must be defined. Topology parameters with a default value can be optionally be overridden."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ParameterDefinition>,
 }
 impl LivePipelinePropertiesUpdate {
@@ -1058,10 +1103,19 @@ pub struct MetricSpecification {
     #[serde(rename = "lockAggregationType", default, skip_serializing_if = "Option::is_none")]
     pub lock_aggregation_type: Option<metric_specification::LockAggregationType>,
     #[doc = "Supported aggregation types."]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "The metric dimensions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Indicates whether regional MDM account is enabled."]
     #[serde(rename = "enableRegionalMdmAccount", default, skip_serializing_if = "Option::is_none")]
@@ -1073,7 +1127,12 @@ pub struct MetricSpecification {
     #[serde(rename = "sourceMdmNamespace", default, skip_serializing_if = "Option::is_none")]
     pub source_mdm_namespace: Option<String>,
     #[doc = "The supported time grain types."]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
 }
 impl MetricSpecification {
@@ -1320,7 +1379,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationCollection {
     #[doc = "A collection of Operation items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationCollection {
@@ -1468,7 +1531,11 @@ impl PipelineJob {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PipelineJobCollection {
     #[doc = "A collection of PipelineJob items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PipelineJob>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1537,7 +1604,11 @@ pub struct PipelineJobProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub error: Option<PipelineJobError>,
     #[doc = "List of the instance level parameter values for the user-defined topology parameters. A pipeline can only define or override parameters values for parameters which have been declared in the referenced topology. Topology parameters without a default value must be defined. Topology parameters with a default value can be optionally be overridden."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ParameterDefinition>,
 }
 impl PipelineJobProperties {
@@ -1615,7 +1686,11 @@ pub struct PipelineJobPropertiesUpdate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub error: Option<PipelineJobError>,
     #[doc = "List of the instance level parameter values for the user-defined topology parameters. A pipeline can only define or override parameters values for parameters which have been declared in the referenced topology. Topology parameters without a default value must be defined. Topology parameters with a default value can be optionally be overridden."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ParameterDefinition>,
 }
 impl PipelineJobPropertiesUpdate {
@@ -1748,7 +1823,11 @@ pub mod pipeline_topology {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PipelineTopologyCollection {
     #[doc = "A collection of PipelineTopology items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PipelineTopology>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1772,12 +1851,20 @@ pub struct PipelineTopologyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of the topology parameter declarations. Parameters declared here can be referenced throughout the topology nodes through the use of \"${PARAMETER_NAME}\" string pattern. Parameters can have optional default values and can later be defined in individual instances of the pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ParameterDeclaration>,
     #[doc = "List of the topology source nodes. Source nodes enable external data to be ingested by the pipeline."]
     pub sources: Vec<SourceNodeBase>,
     #[doc = "List of the topology processor nodes. Processor nodes enable pipeline data to be analyzed, processed or transformed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub processors: Vec<ProcessorNodeBase>,
     #[doc = "List of the topology sink nodes. Sink nodes allow pipeline data to be stored or exported."]
     pub sinks: Vec<SinkNodeBase>,
@@ -1800,16 +1887,32 @@ pub struct PipelineTopologyPropertiesUpdate {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of the topology parameter declarations. Parameters declared here can be referenced throughout the topology nodes through the use of \"${PARAMETER_NAME}\" string pattern. Parameters can have optional default values and can later be defined in individual instances of the pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ParameterDeclaration>,
     #[doc = "List of the topology source nodes. Source nodes enable external data to be ingested by the pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sources: Vec<SourceNodeBase>,
     #[doc = "List of the topology processor nodes. Processor nodes enable pipeline data to be analyzed, processed or transformed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub processors: Vec<ProcessorNodeBase>,
     #[doc = "List of the topology sink nodes. Sink nodes allow pipeline data to be stored or exported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sinks: Vec<SinkNodeBase>,
 }
 impl PipelineTopologyPropertiesUpdate {
@@ -1907,7 +2010,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionListResult {
     #[doc = "Array of private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
 }
 impl PrivateEndpointConnectionListResult {
@@ -2035,7 +2142,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceListResult {
     #[doc = "Array of private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
 }
 impl PrivateLinkResourceListResult {
@@ -2050,10 +2161,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "The private link resource required member names."]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "The private link resource Private link DNS zone name."]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -2298,10 +2419,20 @@ impl SecureIotDeviceRemoteTunnel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "List of log specifications."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "List of metric specifications."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -2636,7 +2767,11 @@ impl VideoAnalyzer {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VideoAnalyzerCollection {
     #[doc = "A collection of VideoAnalyzer items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VideoAnalyzer>,
 }
 impl VideoAnalyzerCollection {
@@ -2735,13 +2870,22 @@ pub struct VideoAnalyzerProperties {
     #[serde(rename = "storageAccounts")]
     pub storage_accounts: Vec<StorageAccount>,
     #[doc = "The endpoints associated with this resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<Endpoint>,
     #[doc = "Defines how the Video Analyzer account is (optionally) encrypted."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<AccountEncryption>,
     #[doc = "The IoT Hubs for this resource."]
-    #[serde(rename = "iotHubs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "iotHubs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub iot_hubs: Vec<IotHub>,
     #[doc = "Whether or not public network access is allowed for resources under the Video Analyzer account."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -2753,7 +2897,12 @@ pub struct VideoAnalyzerProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<video_analyzer_properties::ProvisioningState>,
     #[doc = "Private Endpoint Connections created under Video Analyzer account."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl VideoAnalyzerProperties {
@@ -2853,16 +3002,30 @@ pub mod video_analyzer_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VideoAnalyzerPropertiesUpdate {
     #[doc = "The storage accounts for this resource."]
-    #[serde(rename = "storageAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "storageAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub storage_accounts: Vec<StorageAccount>,
     #[doc = "The endpoints associated with this resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<Endpoint>,
     #[doc = "Defines how the Video Analyzer account is (optionally) encrypted."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub encryption: Option<AccountEncryption>,
     #[doc = "The IoT Hubs for this resource."]
-    #[serde(rename = "iotHubs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "iotHubs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub iot_hubs: Vec<IotHub>,
     #[doc = "Whether or not public network access is allowed for resources under the Video Analyzer account."]
     #[serde(rename = "publicNetworkAccess", default, skip_serializing_if = "Option::is_none")]
@@ -2874,7 +3037,12 @@ pub struct VideoAnalyzerPropertiesUpdate {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<video_analyzer_properties_update::ProvisioningState>,
     #[doc = "Private Endpoint Connections created under Video Analyzer account."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
 }
 impl VideoAnalyzerPropertiesUpdate {
@@ -3103,7 +3271,11 @@ impl VideoEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VideoEntityCollection {
     #[doc = "A collection of VideoEntity items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VideoEntity>,
     #[doc = "A link to the next page of the collection (when the collection contains too many results to return in one response)."]
     #[serde(rename = "@nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/visualstudio/src/package_2014_04_preview/models.rs b/services/mgmt/visualstudio/src/package_2014_04_preview/models.rs
index 03a9bb9a7b..6afbd43fc2 100644
--- a/services/mgmt/visualstudio/src/package_2014_04_preview/models.rs
+++ b/services/mgmt/visualstudio/src/package_2014_04_preview/models.rs
@@ -21,7 +21,11 @@ impl AccountResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountResourceListResult {
     #[doc = "Array of resource details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AccountResource>,
 }
 impl AccountResourceListResult {
@@ -131,7 +135,11 @@ impl ExtensionResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExtensionResourceListResult {
     #[doc = "Array of extension resource details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExtensionResource>,
 }
 impl ExtensionResourceListResult {
@@ -203,7 +211,11 @@ impl Operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "A list of operations supported by a resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl OperationListResult {
@@ -250,7 +262,11 @@ impl ProjectResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProjectResourceListResult {
     #[doc = "List of project resource details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProjectResource>,
 }
 impl ProjectResourceListResult {
diff --git a/services/mgmt/vmware/src/package_2020_03_20/models.rs b/services/mgmt/vmware/src/package_2020_03_20/models.rs
index 70df100462..10654f785e 100644
--- a/services/mgmt/vmware/src/package_2020_03_20/models.rs
+++ b/services/mgmt/vmware/src/package_2020_03_20/models.rs
@@ -86,7 +86,11 @@ impl Cluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -233,10 +237,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -262,7 +275,11 @@ impl ExpressRouteAuthorization {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteAuthorizationList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteAuthorization>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -357,7 +374,11 @@ impl HcxEnterpriseSite {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HcxEnterpriseSiteList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HcxEnterpriseSite>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -542,7 +563,11 @@ pub struct ManagementCluster {
     #[serde(rename = "clusterId", default, skip_serializing_if = "Option::is_none")]
     pub cluster_id: Option<i32>,
     #[doc = "The hosts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosts: Vec<String>,
 }
 impl ManagementCluster {
@@ -598,16 +623,30 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Optional. If set to true, then zero will be returned for time duration where no metric is emitted/published."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
     pub fill_gap_with_zero: Option<bool>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Whether or not the service is using regional MDM accounts."]
     #[serde(rename = "enableRegionalMdmAccount", default, skip_serializing_if = "Option::is_none")]
@@ -676,7 +715,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -728,7 +771,11 @@ impl PrivateCloud {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateCloudList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateCloud>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -877,7 +924,12 @@ pub struct PrivateCloudUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub internet: Option<private_cloud_update_properties::Internet>,
     #[doc = "vCenter Single Sign On Identity Sources"]
-    #[serde(rename = "identitySources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "identitySources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identity_sources: Vec<IdentitySource>,
 }
 impl PrivateCloudUpdateProperties {
@@ -1007,10 +1059,20 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
diff --git a/services/mgmt/vmware/src/package_2021_06_01/models.rs b/services/mgmt/vmware/src/package_2021_06_01/models.rs
index 7f9dd6a51c..64116c5426 100644
--- a/services/mgmt/vmware/src/package_2021_06_01/models.rs
+++ b/services/mgmt/vmware/src/package_2021_06_01/models.rs
@@ -34,7 +34,11 @@ impl AddonHcxProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AddonList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Addon>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -271,7 +275,11 @@ impl CloudLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudLinkList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudLink>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -373,7 +381,11 @@ impl Cluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -481,7 +493,11 @@ pub struct CommonClusterProperties {
     #[serde(rename = "clusterId", default, skip_serializing_if = "Option::is_none")]
     pub cluster_id: Option<i32>,
     #[doc = "The hosts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosts: Vec<String>,
 }
 impl CommonClusterProperties {
@@ -507,7 +523,11 @@ impl Datastore {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatastoreList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Datastore>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -711,10 +731,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -740,7 +769,11 @@ impl ExpressRouteAuthorization {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteAuthorizationList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteAuthorization>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -835,7 +868,11 @@ impl GlobalReachConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GlobalReachConnectionList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GlobalReachConnection>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -975,7 +1012,11 @@ impl HcxEnterpriseSite {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HcxEnterpriseSiteList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HcxEnterpriseSite>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1204,16 +1245,30 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Optional. If set to true, then zero will be returned for time duration where no metric is emitted/published."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
     pub fill_gap_with_zero: Option<bool>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Whether or not the service is using regional MDM accounts."]
     #[serde(rename = "enableRegionalMdmAccount", default, skip_serializing_if = "Option::is_none")]
@@ -1293,7 +1348,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1367,7 +1426,11 @@ impl PrivateCloud {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateCloudList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateCloud>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1423,7 +1486,12 @@ pub struct PrivateCloudProperties {
     #[serde(rename = "nsxtCertificateThumbprint", default, skip_serializing_if = "Option::is_none")]
     pub nsxt_certificate_thumbprint: Option<String>,
     #[doc = "Array of cloud link IDs from other clouds that connect to this one"]
-    #[serde(rename = "externalCloudLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalCloudLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_cloud_links: Vec<String>,
 }
 impl PrivateCloudProperties {
@@ -1520,7 +1588,12 @@ pub struct PrivateCloudUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub internet: Option<private_cloud_update_properties::Internet>,
     #[doc = "vCenter Single Sign On Identity Sources"]
-    #[serde(rename = "identitySources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "identitySources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identity_sources: Vec<IdentitySource>,
 }
 impl PrivateCloudUpdateProperties {
@@ -1689,7 +1762,11 @@ pub struct ScriptCmdletProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub timeout: Option<String>,
     #[doc = "Parameters the script will accept"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ScriptParameter>,
 }
 impl ScriptCmdletProperties {
@@ -1701,7 +1778,11 @@ impl ScriptCmdletProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScriptCmdletsList {
     #[doc = "List of scripts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScriptCmdlet>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1795,10 +1876,19 @@ pub struct ScriptExecutionProperties {
     #[serde(rename = "scriptCmdletId", default, skip_serializing_if = "Option::is_none")]
     pub script_cmdlet_id: Option<String>,
     #[doc = "Parameters the script will accept"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ScriptExecutionParameter>,
     #[doc = "Parameters that will be hidden/not visible to ARM, such as passwords and credentials"]
-    #[serde(rename = "hiddenParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hiddenParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hidden_parameters: Vec<ScriptExecutionParameter>,
     #[doc = "Error message if the script was able to run, but if the script itself had errors or powershell threw an exception"]
     #[serde(rename = "failureReason", default, skip_serializing_if = "Option::is_none")]
@@ -1821,19 +1911,35 @@ pub struct ScriptExecutionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<script_execution_properties::ProvisioningState>,
     #[doc = "Standard output stream from the powershell execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<String>,
     #[doc = "User-defined dictionary."]
     #[serde(rename = "namedOutputs", default, skip_serializing_if = "Option::is_none")]
     pub named_outputs: Option<serde_json::Value>,
     #[doc = "Standard information out stream from the powershell execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub information: Vec<String>,
     #[doc = "Standard warning out stream from the powershell execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub warnings: Vec<String>,
     #[doc = "Standard error output stream from the powershell execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<String>,
 }
 impl ScriptExecutionProperties {
@@ -1911,7 +2017,11 @@ pub mod script_execution_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScriptExecutionsList {
     #[doc = "List of scripts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScriptExecution>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1961,7 +2071,11 @@ impl ScriptPackageProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScriptPackagesList {
     #[doc = "List of script package resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScriptPackage>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2162,10 +2276,20 @@ impl ScriptStringExecutionParameter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -2282,7 +2406,11 @@ pub struct WorkloadNetworkDhcpEntity {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "NSX Segments consuming DHCP."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub segments: Vec<String>,
     #[doc = "The provisioning state"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -2391,7 +2519,11 @@ pub mod workload_network_dhcp_entity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkDhcpList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkDhcp>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2414,7 +2546,12 @@ pub struct WorkloadNetworkDhcpRelay {
     #[serde(flatten)]
     pub workload_network_dhcp_entity: WorkloadNetworkDhcpEntity,
     #[doc = "DHCP Relay Addresses. Max 3."]
-    #[serde(rename = "serverAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_addresses: Vec<String>,
 }
 impl WorkloadNetworkDhcpRelay {
@@ -2473,7 +2610,12 @@ pub struct WorkloadNetworkDnsServiceProperties {
     #[serde(rename = "defaultDnsZone", default, skip_serializing_if = "Option::is_none")]
     pub default_dns_zone: Option<String>,
     #[doc = "FQDN zones of the DNS Service."]
-    #[serde(rename = "fqdnZones", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fqdnZones",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdn_zones: Vec<String>,
     #[doc = "DNS Service log level."]
     #[serde(rename = "logLevel", default, skip_serializing_if = "Option::is_none")]
@@ -2630,7 +2772,11 @@ pub mod workload_network_dns_service_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkDnsServicesList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkDnsService>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2668,10 +2814,19 @@ pub struct WorkloadNetworkDnsZoneProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "Domain names of the DNS Zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domain: Vec<String>,
     #[doc = "DNS Server IP array of the DNS Zone."]
-    #[serde(rename = "dnsServerIps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServerIps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_server_ips: Vec<String>,
     #[doc = "Source IP of the DNS Zone."]
     #[serde(rename = "sourceIp", default, skip_serializing_if = "Option::is_none")]
@@ -2741,7 +2896,11 @@ pub mod workload_network_dns_zone_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkDnsZonesList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkDnsZone>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2776,7 +2935,11 @@ impl WorkloadNetworkGateway {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkGatewayList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkGateway>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2826,7 +2989,11 @@ impl WorkloadNetworkPortMirroring {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkPortMirroringList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkPortMirroring>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3076,7 +3243,11 @@ pub mod workload_network_public_ip_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkPublicIPsList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkPublicIp>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3132,7 +3303,12 @@ pub struct WorkloadNetworkSegmentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub subnet: Option<WorkloadNetworkSegmentSubnet>,
     #[doc = "Port Vif which segment is associated with."]
-    #[serde(rename = "portVif", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "portVif",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub port_vif: Vec<WorkloadNetworkSegmentPortVif>,
     #[doc = "Segment status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3235,7 +3411,12 @@ pub mod workload_network_segment_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkSegmentSubnet {
     #[doc = "DHCP Range assigned for subnet."]
-    #[serde(rename = "dhcpRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dhcpRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dhcp_ranges: Vec<String>,
     #[doc = "Gateway address."]
     #[serde(rename = "gatewayAddress", default, skip_serializing_if = "Option::is_none")]
@@ -3250,7 +3431,11 @@ impl WorkloadNetworkSegmentSubnet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkSegmentsList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkSegment>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3288,7 +3473,11 @@ pub struct WorkloadNetworkVmGroupProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "Virtual machine members of this group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub members: Vec<String>,
     #[doc = "VM Group status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3391,7 +3580,11 @@ pub mod workload_network_vm_group_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkVmGroupsList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkVmGroup>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3480,7 +3673,11 @@ pub mod workload_network_virtual_machine_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkVirtualMachinesList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkVirtualMachine>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/vmware/src/package_2021_12_01/models.rs b/services/mgmt/vmware/src/package_2021_12_01/models.rs
index 7eb5d6ceee..6826be585e 100644
--- a/services/mgmt/vmware/src/package_2021_12_01/models.rs
+++ b/services/mgmt/vmware/src/package_2021_12_01/models.rs
@@ -34,7 +34,11 @@ impl AddonHcxProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AddonList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Addon>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -366,7 +370,11 @@ impl CloudLink {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudLinkList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudLink>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -468,7 +476,11 @@ impl Cluster {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Cluster>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -558,7 +570,11 @@ pub struct ClusterUpdateProperties {
     #[serde(rename = "clusterSize", default, skip_serializing_if = "Option::is_none")]
     pub cluster_size: Option<i32>,
     #[doc = "The hosts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosts: Vec<String>,
 }
 impl ClusterUpdateProperties {
@@ -579,7 +595,11 @@ pub struct CommonClusterProperties {
     #[serde(rename = "clusterId", default, skip_serializing_if = "Option::is_none")]
     pub cluster_id: Option<i32>,
     #[doc = "The hosts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosts: Vec<String>,
 }
 impl CommonClusterProperties {
@@ -605,7 +625,11 @@ impl Datastore {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DatastoreList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Datastore>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1015,10 +1039,19 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponse>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorResponse {
@@ -1044,7 +1077,11 @@ impl ExpressRouteAuthorization {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExpressRouteAuthorizationList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ExpressRouteAuthorization>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1142,7 +1179,11 @@ impl GlobalReachConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GlobalReachConnectionList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<GlobalReachConnection>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1285,7 +1326,11 @@ impl HcxEnterpriseSite {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HcxEnterpriseSiteList {
     #[doc = "The items on a page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HcxEnterpriseSite>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1514,16 +1559,30 @@ pub struct MetricSpecification {
     #[serde(rename = "aggregationType", default, skip_serializing_if = "Option::is_none")]
     pub aggregation_type: Option<String>,
     #[doc = "Supported aggregation types"]
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
     #[doc = "Supported time grain types"]
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
     #[doc = "Optional. If set to true, then zero will be returned for time duration where no metric is emitted/published."]
     #[serde(rename = "fillGapWithZero", default, skip_serializing_if = "Option::is_none")]
     pub fill_gap_with_zero: Option<bool>,
     #[doc = "Dimensions of the metric"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<MetricDimension>,
     #[doc = "Whether or not the service is using regional MDM accounts."]
     #[serde(rename = "enableRegionalMdmAccount", default, skip_serializing_if = "Option::is_none")]
@@ -1603,7 +1662,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1657,7 +1720,11 @@ impl PsCredentialExecutionParameter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PlacementPoliciesList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PlacementPolicy>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1853,10 +1920,20 @@ pub struct PlacementPolicyUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<placement_policy_update_properties::State>,
     #[doc = "Virtual machine members list"]
-    #[serde(rename = "vmMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_members: Vec<String>,
     #[doc = "Host members list"]
-    #[serde(rename = "hostMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub host_members: Vec<String>,
 }
 impl PlacementPolicyUpdateProperties {
@@ -1990,7 +2067,11 @@ pub mod private_cloud_identity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateCloudList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateCloud>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2046,7 +2127,12 @@ pub struct PrivateCloudProperties {
     #[serde(rename = "nsxtCertificateThumbprint", default, skip_serializing_if = "Option::is_none")]
     pub nsxt_certificate_thumbprint: Option<String>,
     #[doc = "Array of cloud link IDs from other clouds that connect to this one"]
-    #[serde(rename = "externalCloudLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "externalCloudLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub external_cloud_links: Vec<String>,
     #[doc = "An ExpressRoute Circuit"]
     #[serde(rename = "secondaryCircuit", default, skip_serializing_if = "Option::is_none")]
@@ -2150,7 +2236,12 @@ pub struct PrivateCloudUpdateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub internet: Option<private_cloud_update_properties::Internet>,
     #[doc = "vCenter Single Sign On Identity Sources"]
-    #[serde(rename = "identitySources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "identitySources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identity_sources: Vec<IdentitySource>,
     #[doc = "The properties describing private cloud availability zone distribution"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2325,7 +2416,11 @@ pub struct ScriptCmdletProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub timeout: Option<String>,
     #[doc = "Parameters the script will accept"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ScriptParameter>,
 }
 impl ScriptCmdletProperties {
@@ -2337,7 +2432,11 @@ impl ScriptCmdletProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScriptCmdletsList {
     #[doc = "List of scripts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScriptCmdlet>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2431,10 +2530,19 @@ pub struct ScriptExecutionProperties {
     #[serde(rename = "scriptCmdletId", default, skip_serializing_if = "Option::is_none")]
     pub script_cmdlet_id: Option<String>,
     #[doc = "Parameters the script will accept"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ScriptExecutionParameter>,
     #[doc = "Parameters that will be hidden/not visible to ARM, such as passwords and credentials"]
-    #[serde(rename = "hiddenParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hiddenParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hidden_parameters: Vec<ScriptExecutionParameter>,
     #[doc = "Error message if the script was able to run, but if the script itself had errors or powershell threw an exception"]
     #[serde(rename = "failureReason", default, skip_serializing_if = "Option::is_none")]
@@ -2457,19 +2565,35 @@ pub struct ScriptExecutionProperties {
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
     pub provisioning_state: Option<script_execution_properties::ProvisioningState>,
     #[doc = "Standard output stream from the powershell execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output: Vec<String>,
     #[doc = "User-defined dictionary."]
     #[serde(rename = "namedOutputs", default, skip_serializing_if = "Option::is_none")]
     pub named_outputs: Option<serde_json::Value>,
     #[doc = "Standard information out stream from the powershell execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub information: Vec<String>,
     #[doc = "Standard warning out stream from the powershell execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub warnings: Vec<String>,
     #[doc = "Standard error output stream from the powershell execution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<String>,
 }
 impl ScriptExecutionProperties {
@@ -2547,7 +2671,11 @@ pub mod script_execution_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScriptExecutionsList {
     #[doc = "List of scripts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScriptExecution>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2597,7 +2725,11 @@ impl ScriptPackageProperties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScriptPackagesList {
     #[doc = "List of script package resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScriptPackage>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2798,10 +2930,20 @@ impl ScriptStringExecutionParameter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Log for Azure Monitoring"]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
     #[doc = "Specifications of the Metrics for Azure Monitoring"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
 }
 impl ServiceSpecification {
@@ -2982,7 +3124,11 @@ impl Serialize for VirtualMachineRestrictMovementState {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct VirtualMachinesList {
     #[doc = "The items to be displayed on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachine>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3074,7 +3220,11 @@ pub struct WorkloadNetworkDhcpEntity {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "NSX Segments consuming DHCP."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub segments: Vec<String>,
     #[doc = "The provisioning state"]
     #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
@@ -3183,7 +3333,11 @@ pub mod workload_network_dhcp_entity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkDhcpList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkDhcp>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3206,7 +3360,12 @@ pub struct WorkloadNetworkDhcpRelay {
     #[serde(flatten)]
     pub workload_network_dhcp_entity: WorkloadNetworkDhcpEntity,
     #[doc = "DHCP Relay Addresses. Max 3."]
-    #[serde(rename = "serverAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serverAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub server_addresses: Vec<String>,
 }
 impl WorkloadNetworkDhcpRelay {
@@ -3265,7 +3424,12 @@ pub struct WorkloadNetworkDnsServiceProperties {
     #[serde(rename = "defaultDnsZone", default, skip_serializing_if = "Option::is_none")]
     pub default_dns_zone: Option<String>,
     #[doc = "FQDN zones of the DNS Service."]
-    #[serde(rename = "fqdnZones", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fqdnZones",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdn_zones: Vec<String>,
     #[doc = "DNS Service log level."]
     #[serde(rename = "logLevel", default, skip_serializing_if = "Option::is_none")]
@@ -3422,7 +3586,11 @@ pub mod workload_network_dns_service_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkDnsServicesList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkDnsService>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3460,10 +3628,19 @@ pub struct WorkloadNetworkDnsZoneProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "Domain names of the DNS Zone."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub domain: Vec<String>,
     #[doc = "DNS Server IP array of the DNS Zone."]
-    #[serde(rename = "dnsServerIps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServerIps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_server_ips: Vec<String>,
     #[doc = "Source IP of the DNS Zone."]
     #[serde(rename = "sourceIp", default, skip_serializing_if = "Option::is_none")]
@@ -3533,7 +3710,11 @@ pub mod workload_network_dns_zone_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkDnsZonesList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkDnsZone>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3568,7 +3749,11 @@ impl WorkloadNetworkGateway {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkGatewayList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkGateway>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3618,7 +3803,11 @@ impl WorkloadNetworkPortMirroring {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkPortMirroringList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkPortMirroring>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3877,7 +4066,11 @@ pub mod workload_network_public_ip_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkPublicIPsList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkPublicIp>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3933,7 +4126,12 @@ pub struct WorkloadNetworkSegmentProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub subnet: Option<WorkloadNetworkSegmentSubnet>,
     #[doc = "Port Vif which segment is associated with."]
-    #[serde(rename = "portVif", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "portVif",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub port_vif: Vec<WorkloadNetworkSegmentPortVif>,
     #[doc = "Segment status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4039,7 +4237,12 @@ pub mod workload_network_segment_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkSegmentSubnet {
     #[doc = "DHCP Range assigned for subnet."]
-    #[serde(rename = "dhcpRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dhcpRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dhcp_ranges: Vec<String>,
     #[doc = "Gateway address."]
     #[serde(rename = "gatewayAddress", default, skip_serializing_if = "Option::is_none")]
@@ -4054,7 +4257,11 @@ impl WorkloadNetworkSegmentSubnet {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkSegmentsList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkSegment>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4092,7 +4299,11 @@ pub struct WorkloadNetworkVmGroupProperties {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "Virtual machine members of this group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub members: Vec<String>,
     #[doc = "VM Group status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4198,7 +4409,11 @@ pub mod workload_network_vm_group_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkVmGroupsList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkVmGroup>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4293,7 +4508,11 @@ pub mod workload_network_virtual_machine_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkloadNetworkVirtualMachinesList {
     #[doc = "The items on the page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkloadNetworkVirtualMachine>,
     #[doc = "URL to get the next page if any"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/vmwarecloudsimple/src/package_2019_04_01/models.rs b/services/mgmt/vmwarecloudsimple/src/package_2019_04_01/models.rs
index de6e6ebb1d..6c43607833 100644
--- a/services/mgmt/vmwarecloudsimple/src/package_2019_04_01/models.rs
+++ b/services/mgmt/vmwarecloudsimple/src/package_2019_04_01/models.rs
@@ -120,7 +120,12 @@ pub mod available_operation_display_property_service_specification_metrics_item
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AvailableOperationDisplayPropertyServiceSpecificationMetricsList {
     #[doc = "Metric specifications of operation"]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<AvailableOperationDisplayPropertyServiceSpecificationMetricsItem>,
 }
 impl AvailableOperationDisplayPropertyServiceSpecificationMetricsList {
@@ -135,7 +140,11 @@ pub struct AvailableOperationsListResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Returns a list of available operations"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AvailableOperation>,
 }
 impl azure_core::Continuable for AvailableOperationsListResponse {
@@ -174,7 +183,11 @@ pub struct CsrpErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub code: Option<String>,
     #[doc = "Error's details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CsrpErrorBody>,
     #[doc = "Error's message"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -255,7 +268,11 @@ pub mod customization_ip_address {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CustomizationIpSettings {
     #[doc = "The list of gateways"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gateway: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub ip: Option<CustomizationIpAddress>,
@@ -333,7 +350,11 @@ pub struct CustomizationPoliciesListResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of the customization policies"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CustomizationPolicy>,
 }
 impl azure_core::Continuable for CustomizationPoliciesListResponse {
@@ -411,7 +432,12 @@ pub struct CustomizationSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<CustomizationIdentity>,
     #[doc = "Network interface settings"]
-    #[serde(rename = "nicSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nicSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nic_settings: Vec<CustomizationNicSetting>,
 }
 impl CustomizationSpecification {
@@ -463,7 +489,11 @@ pub struct DedicatedCloudNodeListResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Results of the DedicatedCloudNode list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DedicatedCloudNode>,
 }
 impl azure_core::Continuable for DedicatedCloudNodeListResponse {
@@ -594,7 +624,11 @@ pub struct DedicatedCloudServiceListResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Results of the DedicatedCloudService list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DedicatedCloudService>,
 }
 impl azure_core::Continuable for DedicatedCloudServiceListResponse {
@@ -653,7 +687,12 @@ pub mod dedicated_cloud_service_properties {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GuestOsCustomization {
     #[doc = "List of dns servers to use"]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<Ipv4Address>,
     #[doc = "Virtual Machine hostname"]
     #[serde(rename = "hostName", default, skip_serializing_if = "Option::is_none")]
@@ -680,10 +719,19 @@ pub struct GuestOsnicCustomization {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub allocation: Option<guest_osnic_customization::Allocation>,
     #[doc = "List of dns servers to use"]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<Ipv4Address>,
     #[doc = "Gateway addresses assigned to nic"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub gateway: Vec<Ipv4Address>,
     #[serde(rename = "ipAddress", default, skip_serializing_if = "Option::is_none")]
     pub ip_address: Option<Ipv4Address>,
@@ -805,7 +853,11 @@ pub struct PrivateCloudList {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "the list of private clouds"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateCloud>,
 }
 impl azure_core::Continuable for PrivateCloudList {
@@ -838,7 +890,12 @@ pub struct PrivateCloudProperties {
     #[serde(rename = "createdOn", default, with = "azure_core::date::rfc3339::option")]
     pub created_on: Option<time::OffsetDateTime>,
     #[doc = "Array of DNS servers"]
-    #[serde(rename = "dnsServers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dnsServers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_servers: Vec<String>,
     #[doc = "Expiration date of PC"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -856,7 +913,12 @@ pub struct PrivateCloudProperties {
     #[serde(rename = "privateCloudId", default, skip_serializing_if = "Option::is_none")]
     pub private_cloud_id: Option<String>,
     #[doc = "The list of Resource Pools"]
-    #[serde(rename = "resourcePools", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourcePools",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_pools: Vec<ResourcePool>,
     #[doc = "Private Cloud state, e.g. \"operational\""]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -886,10 +948,20 @@ pub struct PrivateCloudProperties {
     #[serde(rename = "vcenterRefid", default, skip_serializing_if = "Option::is_none")]
     pub vcenter_refid: Option<String>,
     #[doc = "The list of Virtual Machine Templates"]
-    #[serde(rename = "virtualMachineTemplates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualMachineTemplates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_machine_templates: Vec<VirtualMachineTemplate>,
     #[doc = "The list of Virtual Networks"]
-    #[serde(rename = "virtualNetworks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualNetworks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_networks: Vec<VirtualNetwork>,
     #[doc = "Is Vrops enabled/disabled"]
     #[serde(rename = "vrOpsEnabled", default, skip_serializing_if = "Option::is_none")]
@@ -952,7 +1024,11 @@ pub struct ResourcePoolsListResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Results of the Resource pools list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ResourcePool>,
 }
 impl azure_core::Continuable for ResourcePoolsListResponse {
@@ -1043,7 +1119,11 @@ pub struct SkuAvailabilityListResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Results of the DedicatedPlacementGroupSkuAvailability list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuAvailability>,
 }
 impl azure_core::Continuable for SkuAvailabilityListResponse {
@@ -1123,7 +1203,11 @@ pub struct UsageListResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "The list of usages"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Usage>,
 }
 impl azure_core::Continuable for UsageListResponse {
@@ -1256,7 +1340,11 @@ pub struct VirtualMachineListResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Results of the VirtualMachine list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachine>,
 }
 impl azure_core::Continuable for VirtualMachineListResponse {
@@ -1277,13 +1365,21 @@ pub struct VirtualMachineProperties {
     #[serde(rename = "amountOfRam")]
     pub amount_of_ram: i64,
     #[doc = "The list of Virtual Disks' Controllers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub controllers: Vec<VirtualDiskController>,
     #[doc = "Guest OS Customization properties"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub customization: Option<GuestOsCustomization>,
     #[doc = "The list of Virtual Disks"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<VirtualDisk>,
     #[doc = "The DNS name of Virtual Machine in VCenter"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1301,7 +1397,11 @@ pub struct VirtualMachineProperties {
     #[serde(rename = "guestOSType", default, skip_serializing_if = "Option::is_none")]
     pub guest_os_type: Option<virtual_machine_properties::GuestOsType>,
     #[doc = "The list of Virtual NICs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nics: Vec<VirtualNic>,
     #[doc = "The number of CPU cores"]
     #[serde(rename = "numberOfCores")]
@@ -1331,7 +1431,12 @@ pub struct VirtualMachineProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub username: Option<String>,
     #[doc = "The list of Virtual VSphere Networks"]
-    #[serde(rename = "vSphereNetworks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vSphereNetworks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_sphere_networks: Vec<String>,
     #[doc = "The internal id of Virtual Machine in VCenter"]
     #[serde(rename = "vmId", default, skip_serializing_if = "Option::is_none")]
@@ -1455,7 +1560,11 @@ pub struct VirtualMachineTemplateListResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Results of the VM template list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualMachineTemplate>,
 }
 impl azure_core::Continuable for VirtualMachineTemplateListResponse {
@@ -1476,13 +1585,21 @@ pub struct VirtualMachineTemplateProperties {
     #[serde(rename = "amountOfRam", default, skip_serializing_if = "Option::is_none")]
     pub amount_of_ram: Option<i64>,
     #[doc = "The list of Virtual Disk Controllers"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub controllers: Vec<VirtualDiskController>,
     #[doc = "The description of Virtual Machine Template"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of Virtual Disks"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disks: Vec<VirtualDisk>,
     #[doc = "Expose Guest OS or not"]
     #[serde(rename = "exposeToGuestVM", default, skip_serializing_if = "Option::is_none")]
@@ -1494,7 +1611,11 @@ pub struct VirtualMachineTemplateProperties {
     #[serde(rename = "guestOSType", default, skip_serializing_if = "Option::is_none")]
     pub guest_os_type: Option<String>,
     #[doc = "The list of Virtual NICs"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub nics: Vec<VirtualNic>,
     #[doc = "The number of CPU cores"]
     #[serde(rename = "numberOfCores", default, skip_serializing_if = "Option::is_none")]
@@ -1506,10 +1627,20 @@ pub struct VirtualMachineTemplateProperties {
     #[serde(rename = "privateCloudId")]
     pub private_cloud_id: String,
     #[doc = "The list of VSphere networks"]
-    #[serde(rename = "vSphereNetworks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vSphereNetworks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_sphere_networks: Vec<String>,
     #[doc = "The tags from VSphere"]
-    #[serde(rename = "vSphereTags", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vSphereTags",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub v_sphere_tags: Vec<String>,
     #[doc = "The VMware tools version"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1575,7 +1706,11 @@ pub struct VirtualNetworkListResponse {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Results of the VirtualNetwork list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<VirtualNetwork>,
 }
 impl azure_core::Continuable for VirtualNetworkListResponse {
@@ -1608,7 +1743,12 @@ pub struct VirtualNic {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub customization: Option<GuestOsnicCustomization>,
     #[doc = "NIC ip address"]
-    #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_addresses: Vec<String>,
     #[doc = "NIC MAC address"]
     #[serde(rename = "macAddress", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/web/examples/get_config.rs b/services/mgmt/web/examples/get_config.rs
new file mode 100644
index 0000000000..6240766912
--- /dev/null
+++ b/services/mgmt/web/examples/get_config.rs
@@ -0,0 +1,22 @@
+// cargo run --package azure_mgmt_web --example get_config -- resource_group webapp
+
+use azure_identity::AzureCliCredential;
+use std::{error::Error, sync::Arc};
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn Error>> {
+    let resource_group_name = std::env::args().nth(1).expect("please specify resource group");
+    let webapp_name = std::env::args().nth(2).expect("please specify webapp name");
+
+    let credential = Arc::new(AzureCliCredential::new());
+    let subscription_id = AzureCliCredential::get_subscription()?;
+    let client = azure_mgmt_web::Client::builder(credential).build();
+
+    let config = client
+        .web_apps_client()
+        .get_configuration(resource_group_name, webapp_name, subscription_id)
+        .into_future()
+        .await?;
+    println!("{:#?}", config);
+    Ok(())
+}
diff --git a/services/mgmt/web/src/package_2021_01/models.rs b/services/mgmt/web/src/package_2021_01/models.rs
index 182ae07ffd..0f6a403395 100644
--- a/services/mgmt/web/src/package_2021_01/models.rs
+++ b/services/mgmt/web/src/package_2021_01/models.rs
@@ -13,10 +13,18 @@ pub struct AbnormalTimePeriod {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "List of Possible Cause of downtime"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<DetectorAbnormalTimePeriod>,
     #[doc = "List of proposed solutions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub solutions: Vec<Solution>,
 }
 impl AbnormalTimePeriod {
@@ -80,10 +88,20 @@ pub mod address_response {
         #[serde(rename = "internalIpAddress", default, skip_serializing_if = "Option::is_none")]
         pub internal_ip_address: Option<String>,
         #[doc = "IP addresses appearing on outbound connections."]
-        #[serde(rename = "outboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "outboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub outbound_ip_addresses: Vec<String>,
         #[doc = "Additional virtual IPs."]
-        #[serde(rename = "vipMappings", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "vipMappings",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub vip_mappings: Vec<VirtualIpMapping>,
     }
     impl Properties {
@@ -96,7 +114,12 @@ pub mod address_response {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedAudiencesValidation {
     #[doc = "The configuration settings of the allowed list of audiences from which to validate the JWT token."]
-    #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAudiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_audiences: Vec<String>,
 }
 impl AllowedAudiencesValidation {
@@ -114,10 +137,18 @@ pub struct AnalysisData {
     #[serde(rename = "detectorDefinition", default, skip_serializing_if = "Option::is_none")]
     pub detector_definition: Option<DetectorDefinition>,
     #[doc = "Source Metrics"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<DiagnosticMetricSet>,
     #[doc = "Additional Source Data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<Vec<NameValuePair>>,
     #[serde(rename = "detectorMetaData", default, skip_serializing_if = "Option::is_none")]
     pub detector_meta_data: Option<ResponseMetaData>,
@@ -441,6 +472,7 @@ pub mod app_service_certificate_order {
         #[serde(
             rename = "appServiceCertificateNotRenewableReasons",
             default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
             skip_serializing_if = "Vec::is_empty"
         )]
         pub app_service_certificate_not_renewable_reasons: Vec<String>,
@@ -603,6 +635,7 @@ pub mod app_service_certificate_order_patch_resource {
         #[serde(
             rename = "appServiceCertificateNotRenewableReasons",
             default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
             skip_serializing_if = "Vec::is_empty"
         )]
         pub app_service_certificate_not_renewable_reasons: Vec<String>,
@@ -739,10 +772,20 @@ pub struct AppServiceEnvironment {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub suspended: Option<bool>,
     #[doc = "Custom settings for changing the behavior of the App Service Environment."]
-    #[serde(rename = "clusterSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_settings: Vec<NameValuePair>,
     #[doc = "User added ip ranges to whitelist on ASE db"]
-    #[serde(rename = "userWhitelistedIpRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userWhitelistedIpRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_whitelisted_ip_ranges: Vec<String>,
     #[doc = "Flag that displays whether an ASE has linux workers or not"]
     #[serde(rename = "hasLinuxWorkers", default, skip_serializing_if = "Option::is_none")]
@@ -1193,13 +1236,27 @@ pub struct ApplicationStack {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub dependency: Option<String>,
     #[doc = "List of major versions available."]
-    #[serde(rename = "majorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "majorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub major_versions: Vec<StackMajorVersion>,
     #[doc = "List of frameworks associated with application stack."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frameworks: Vec<ApplicationStack>,
     #[doc = "<code>true</code> if this is the stack is deprecated; otherwise, <code>false</code>."]
-    #[serde(rename = "isDeprecated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "isDeprecated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub is_deprecated: Vec<ApplicationStack>,
 }
 impl ApplicationStack {
@@ -1362,9 +1419,19 @@ pub mod ase_v3_networking_configuration {
     #[doc = "AseV3NetworkingConfiguration resource specific properties"]
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
-        #[serde(rename = "windowsOutboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "windowsOutboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub windows_outbound_ip_addresses: Vec<String>,
-        #[serde(rename = "linuxOutboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "linuxOutboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub linux_outbound_ip_addresses: Vec<String>,
         #[doc = "Property to enable and disable new private endpoint connection creation on ASE"]
         #[serde(rename = "allowNewPrivateEndpointConnections", default, skip_serializing_if = "Option::is_none")]
@@ -1462,16 +1529,31 @@ pub struct AutoHealTriggers {
     #[serde(rename = "privateBytesInKB", default, skip_serializing_if = "Option::is_none")]
     pub private_bytes_in_kb: Option<i32>,
     #[doc = "A rule based on status codes."]
-    #[serde(rename = "statusCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_codes: Vec<StatusCodesBasedTrigger>,
     #[doc = "Trigger based on request execution time."]
     #[serde(rename = "slowRequests", default, skip_serializing_if = "Option::is_none")]
     pub slow_requests: Option<SlowRequestsBasedTrigger>,
     #[doc = "A rule based on multiple Slow Requests Rule with path"]
-    #[serde(rename = "slowRequestsWithPath", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "slowRequestsWithPath",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub slow_requests_with_path: Vec<SlowRequestsBasedTrigger>,
     #[doc = "A rule based on status codes ranges."]
-    #[serde(rename = "statusCodesRange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusCodesRange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_codes_range: Vec<StatusCodesRangeBasedTrigger>,
 }
 impl AutoHealTriggers {
@@ -1507,7 +1589,12 @@ impl AzureActiveDirectory {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureActiveDirectoryLogin {
     #[doc = "Login parameters to send to the OpenID Connect authorization endpoint when\na user logs in. Each parameter must be in the form \"key=value\"."]
-    #[serde(rename = "loginParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_parameters: Vec<String>,
     #[doc = "<code>true</code> if the www-authenticate provider should be omitted from the request; otherwise, <code>false</code>."]
     #[serde(rename = "disableWWWAuthenticate", default, skip_serializing_if = "Option::is_none")]
@@ -1556,7 +1643,12 @@ pub struct AzureActiveDirectoryValidation {
     #[serde(rename = "jwtClaimChecks", default, skip_serializing_if = "Option::is_none")]
     pub jwt_claim_checks: Option<JwtClaimChecks>,
     #[doc = "The list of audiences that can make successful authentication/authorization requests."]
-    #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAudiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_audiences: Vec<String>,
 }
 impl AzureActiveDirectoryValidation {
@@ -1768,7 +1860,11 @@ pub mod backup_item {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub log: Option<String>,
         #[doc = "List of databases included in the backup."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub databases: Vec<DatabaseBackupSetting>,
         #[doc = "True if this backup has been created due to a schedule being triggered."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1861,7 +1957,11 @@ pub mod backup_request {
         #[serde(rename = "backupSchedule", default, skip_serializing_if = "Option::is_none")]
         pub backup_schedule: Option<BackupSchedule>,
         #[doc = "Databases included in the backup."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub databases: Vec<DatabaseBackupSetting>,
     }
     impl Properties {
@@ -2058,7 +2158,12 @@ pub mod certificate {
         #[serde(rename = "subjectName", default, skip_serializing_if = "Option::is_none")]
         pub subject_name: Option<String>,
         #[doc = "Host names the certificate applies to."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Pfx blob."]
         #[serde(rename = "pfxBlob", default, skip_serializing_if = "Option::is_none")]
@@ -2322,7 +2427,12 @@ pub mod certificate_patch_resource {
         #[serde(rename = "subjectName", default, skip_serializing_if = "Option::is_none")]
         pub subject_name: Option<String>,
         #[doc = "Host names the certificate applies to."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Pfx blob."]
         #[serde(rename = "pfxBlob", default, skip_serializing_if = "Option::is_none")]
@@ -2621,7 +2731,12 @@ impl ContainerCpuStatistics {
 pub struct ContainerCpuUsage {
     #[serde(rename = "totalUsage", default, skip_serializing_if = "Option::is_none")]
     pub total_usage: Option<i64>,
-    #[serde(rename = "perCpuUsage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "perCpuUsage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub per_cpu_usage: Vec<i64>,
     #[serde(rename = "kernelModeUsage", default, skip_serializing_if = "Option::is_none")]
     pub kernel_mode_usage: Option<i64>,
@@ -2831,7 +2946,12 @@ pub mod cookie_expiration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CorsSettings {
     #[doc = "Gets or sets the list of origins that should be allowed to make cross-origin\ncalls (for example: http://example.com:12345). Use \"*\" to allow all."]
-    #[serde(rename = "allowedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_origins: Vec<String>,
     #[doc = "Gets or sets whether CORS requests with credentials are allowed. See \nhttps://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#Requests_with_credentials\nfor more details."]
     #[serde(rename = "supportCredentials", default, skip_serializing_if = "Option::is_none")]
@@ -2847,7 +2967,11 @@ impl CorsSettings {
 pub struct CsmMoveResourceEnvelope {
     #[serde(rename = "targetResourceGroup", default, skip_serializing_if = "Option::is_none")]
     pub target_resource_group: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
 }
 impl CsmMoveResourceEnvelope {
@@ -3140,19 +3264,44 @@ pub mod custom_hostname_analysis_result {
         #[serde(rename = "conflictingAppResourceId", default, skip_serializing_if = "Option::is_none")]
         pub conflicting_app_resource_id: Option<String>,
         #[doc = "CName records controller can see for this hostname."]
-        #[serde(rename = "cNameRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "cNameRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub c_name_records: Vec<String>,
         #[doc = "TXT records controller can see for this hostname."]
-        #[serde(rename = "txtRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "txtRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub txt_records: Vec<String>,
         #[doc = "A records controller can see for this hostname."]
-        #[serde(rename = "aRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "aRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub a_records: Vec<String>,
         #[doc = "Alternate CName records controller can see for this hostname."]
-        #[serde(rename = "alternateCNameRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "alternateCNameRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub alternate_c_name_records: Vec<String>,
         #[doc = "Alternate TXT records controller can see for this hostname."]
-        #[serde(rename = "alternateTxtRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "alternateTxtRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub alternate_txt_records: Vec<String>,
     }
     impl Properties {
@@ -3195,7 +3344,12 @@ pub struct DataProviderMetadata {
     #[serde(rename = "providerName", default, skip_serializing_if = "Option::is_none")]
     pub provider_name: Option<String>,
     #[doc = "Settings for the data provider"]
-    #[serde(rename = "propertyBag", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyBag",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_bag: Vec<KeyValuePairStringObject>,
 }
 impl DataProviderMetadata {
@@ -3207,10 +3361,19 @@ impl DataProviderMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataSource {
     #[doc = "Instructions if any for the data source"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instructions: Vec<String>,
     #[doc = "Datasource Uri Links"]
-    #[serde(rename = "dataSourceUri", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSourceUri",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_source_uri: Vec<NameValuePair>,
 }
 impl DataSource {
@@ -3243,10 +3406,18 @@ pub struct DataTableResponseObject {
     #[serde(rename = "tableName", default, skip_serializing_if = "Option::is_none")]
     pub table_name: Option<String>,
     #[doc = "List of columns with data types"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<DataTableResponseColumn>,
     #[doc = "Raw row values"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rows: Vec<Vec<String>>,
 }
 impl DataTableResponseObject {
@@ -3355,7 +3526,11 @@ pub mod default_error_response {
         #[doc = "Detailed error description and debugging information."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<serde_json::Value>,
         #[doc = "More information to debug error."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3552,13 +3727,27 @@ impl DeploymentCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeploymentLocations {
     #[doc = "Available regions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<GeoRegion>,
     #[doc = "Available App Service Environments with full descriptions of the environments."]
-    #[serde(rename = "hostingEnvironments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostingEnvironments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosting_environments: Vec<AppServiceEnvironment>,
     #[doc = "Available App Service Environments with basic information."]
-    #[serde(rename = "hostingEnvironmentDeploymentInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostingEnvironmentDeploymentInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosting_environment_deployment_infos: Vec<HostingEnvironmentDeploymentInfo>,
 }
 impl DeploymentLocations {
@@ -3585,13 +3774,22 @@ pub struct DetectorAbnormalTimePeriod {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub priority: Option<f64>,
     #[doc = "Downtime metadata"]
-    #[serde(rename = "metaData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metaData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meta_data: Vec<Vec<NameValuePair>>,
     #[doc = "Represents the type of the Detector"]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<detector_abnormal_time_period::Type>,
     #[doc = "List of proposed solutions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub solutions: Vec<Solution>,
 }
 impl DetectorAbnormalTimePeriod {
@@ -3671,10 +3869,20 @@ pub struct DetectorInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "List of Support Topics for which this detector is enabled."]
-    #[serde(rename = "supportTopicList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportTopicList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub support_topic_list: Vec<SupportTopic>,
     #[doc = "Analysis Types for which this detector should apply to."]
-    #[serde(rename = "analysisType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "analysisType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub analysis_type: Vec<String>,
     #[doc = "Whether this detector is an Analysis Detector or not."]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
@@ -3721,13 +3929,22 @@ pub mod detector_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub metadata: Option<DetectorInfo>,
         #[doc = "Data Set"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub dataset: Vec<DiagnosticData>,
         #[doc = "Identify the status of the most severe insight generated by the detector."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub status: Option<Status>,
         #[doc = "Additional configuration for different data providers to be used by the UI"]
-        #[serde(rename = "dataProvidersMetadata", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "dataProvidersMetadata",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub data_providers_metadata: Vec<DataProviderMetadata>,
         #[doc = "Suggested utterances where the detector can be applicable"]
         #[serde(rename = "suggestedUtterances", default, skip_serializing_if = "Option::is_none")]
@@ -3785,13 +4002,27 @@ pub mod diagnostic_analysis {
         #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
         pub end_time: Option<time::OffsetDateTime>,
         #[doc = "List of time periods."]
-        #[serde(rename = "abnormalTimePeriods", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "abnormalTimePeriods",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub abnormal_time_periods: Vec<AbnormalTimePeriod>,
         #[doc = "Data by each detector"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub payload: Vec<AnalysisData>,
         #[doc = "Data by each detector for detectors that did not corelate"]
-        #[serde(rename = "nonCorrelatedDetectors", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "nonCorrelatedDetectors",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub non_correlated_detectors: Vec<DetectorDefinition>,
     }
     impl Properties {
@@ -3936,13 +4167,26 @@ pub mod diagnostic_detector_response {
         #[serde(rename = "detectorDefinition", default, skip_serializing_if = "Option::is_none")]
         pub detector_definition: Option<DetectorDefinition>,
         #[doc = "Metrics provided by the detector"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub metrics: Vec<DiagnosticMetricSet>,
         #[doc = "List of Correlated events found by the detector"]
-        #[serde(rename = "abnormalTimePeriods", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "abnormalTimePeriods",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub abnormal_time_periods: Vec<DetectorAbnormalTimePeriod>,
         #[doc = "Additional Data that detector wants to send."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub data: Vec<Vec<NameValuePair>>,
         #[serde(rename = "responseMetaData", default, skip_serializing_if = "Option::is_none")]
         pub response_meta_data: Option<ResponseMetaData>,
@@ -3999,7 +4243,11 @@ pub struct DiagnosticMetricSet {
     #[serde(rename = "timeGrain", default, skip_serializing_if = "Option::is_none")]
     pub time_grain: Option<String>,
     #[doc = "Collection of metric values for the selected period based on the {Microsoft.Web.Hosting.Administration.DiagnosticMetricSet.TimeGrain}"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<DiagnosticMetricSample>,
 }
 impl DiagnosticMetricSet {
@@ -4065,7 +4313,12 @@ pub mod domain {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<properties::ProvisioningState>,
         #[doc = "Name servers."]
-        #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "nameServers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub name_servers: Vec<String>,
         #[doc = "<code>true</code> if domain privacy is enabled for this domain; otherwise, <code>false</code>."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4086,12 +4339,22 @@ pub mod domain {
         #[serde(rename = "readyForDnsRecordManagement", default, skip_serializing_if = "Option::is_none")]
         pub ready_for_dns_record_management: Option<bool>,
         #[doc = "All hostnames derived from the domain and assigned to Azure resources."]
-        #[serde(rename = "managedHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "managedHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub managed_host_names: Vec<HostName>,
         #[doc = "Domain purchase consent object, representing acceptance of applicable legal agreements."]
         pub consent: DomainPurchaseConsent,
         #[doc = "Reasons why domain is not renewable."]
-        #[serde(rename = "domainNotRenewableReasons", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "domainNotRenewableReasons",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub domain_not_renewable_reasons: Vec<String>,
         #[doc = "Current DNS type"]
         #[serde(rename = "dnsType", default, skip_serializing_if = "Option::is_none")]
@@ -4339,7 +4602,12 @@ pub mod domain_patch_resource {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<properties::ProvisioningState>,
         #[doc = "Name servers."]
-        #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "nameServers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub name_servers: Vec<String>,
         #[doc = "<code>true</code> if domain privacy is enabled for this domain; otherwise, <code>false</code>."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4360,12 +4628,22 @@ pub mod domain_patch_resource {
         #[serde(rename = "readyForDnsRecordManagement", default, skip_serializing_if = "Option::is_none")]
         pub ready_for_dns_record_management: Option<bool>,
         #[doc = "All hostnames derived from the domain and assigned to Azure resources."]
-        #[serde(rename = "managedHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "managedHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub managed_host_names: Vec<HostName>,
         #[doc = "Domain purchase consent object, representing acceptance of applicable legal agreements."]
         pub consent: DomainPurchaseConsent,
         #[doc = "Reasons why domain is not renewable."]
-        #[serde(rename = "domainNotRenewableReasons", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "domainNotRenewableReasons",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub domain_not_renewable_reasons: Vec<String>,
         #[doc = "Current DNS type"]
         #[serde(rename = "dnsType", default, skip_serializing_if = "Option::is_none")]
@@ -4465,7 +4743,12 @@ pub mod domain_patch_resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainPurchaseConsent {
     #[doc = "List of applicable legal agreement keys. This list can be retrieved using ListLegalAgreements API under <code>TopLevelDomain</code> resource."]
-    #[serde(rename = "agreementKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agreementKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agreement_keys: Vec<String>,
     #[doc = "Client IP address."]
     #[serde(rename = "agreedBy", default, skip_serializing_if = "Option::is_none")]
@@ -4513,7 +4796,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The IP Addresses and Ports used when connecting to DomainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -4552,10 +4840,19 @@ pub struct ErrorEntity {
     #[serde(rename = "messageTemplate", default, skip_serializing_if = "Option::is_none")]
     pub message_template: Option<String>,
     #[doc = "Parameters for the template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<String>,
     #[doc = "Inner errors."]
-    #[serde(rename = "innerErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "innerErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inner_errors: Vec<ErrorEntity>,
     #[doc = "Basic error code."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4573,7 +4870,12 @@ impl ErrorEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Experiments {
     #[doc = "List of ramp-up rules."]
-    #[serde(rename = "rampUpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rampUpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ramp_up_rules: Vec<RampUpRule>,
 }
 impl Experiments {
@@ -4732,7 +5034,12 @@ pub struct FunctionAppMajorVersion {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     #[doc = "Minor versions associated with the major version."]
-    #[serde(rename = "minorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "minorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minor_versions: Vec<FunctionAppMinorVersion>,
 }
 impl FunctionAppMajorVersion {
@@ -4780,7 +5087,12 @@ pub struct FunctionAppRuntimeSettings {
     #[serde(rename = "siteConfigPropertiesDictionary", default, skip_serializing_if = "Option::is_none")]
     pub site_config_properties_dictionary: Option<SiteConfigPropertiesDictionary>,
     #[doc = "List of supported Functions extension versions."]
-    #[serde(rename = "supportedFunctionsExtensionVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFunctionsExtensionVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_functions_extension_versions: Vec<String>,
     #[doc = "<code>true</code> if the stack is in preview; otherwise, <code>false</code>."]
     #[serde(rename = "isPreview", default, skip_serializing_if = "Option::is_none")]
@@ -4853,7 +5165,12 @@ pub mod function_app_stack {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub value: Option<String>,
         #[doc = "List of major versions available."]
-        #[serde(rename = "majorVersions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "majorVersions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub major_versions: Vec<FunctionAppMajorVersion>,
         #[doc = "Function App stack preferred OS."]
         #[serde(rename = "preferredOs", default, skip_serializing_if = "Option::is_none")]
@@ -5158,10 +5475,18 @@ pub struct GlobalCsmSkuDescription {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<SkuCapacity>,
     #[doc = "Locations of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Capabilities of the SKU, e.g., is traffic manager enabled?"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
 }
 impl GlobalCsmSkuDescription {
@@ -5182,7 +5507,12 @@ pub struct GlobalValidation {
     #[serde(rename = "redirectToProvider", default, skip_serializing_if = "Option::is_none")]
     pub redirect_to_provider: Option<String>,
     #[doc = "The paths for which unauthenticated flow would not be redirected to the login page."]
-    #[serde(rename = "excludedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_paths: Vec<String>,
 }
 impl GlobalValidation {
@@ -5265,7 +5595,12 @@ pub struct HostName {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of apps the hostname is assigned to. This list will have more than one app only if the hostname is pointing to a Traffic Manager."]
-    #[serde(rename = "siteNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "siteNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub site_names: Vec<String>,
     #[doc = "Name of the Azure resource the hostname is assigned to. If it is assigned to a Traffic Manager then it will be the Traffic Manager name otherwise it will be the app name."]
     #[serde(rename = "azureResourceName", default, skip_serializing_if = "Option::is_none")]
@@ -5769,10 +6104,18 @@ pub struct InboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The IP addresses that network traffic will originate from in cidr notation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<String>,
     #[doc = "The ports that network traffic will arrive to the App Service Environment at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<String>,
 }
 impl InboundEnvironmentEndpoint {
@@ -5888,10 +6231,20 @@ pub mod ip_security_restriction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JwtClaimChecks {
     #[doc = "The list of the allowed groups."]
-    #[serde(rename = "allowedGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_groups: Vec<String>,
     #[doc = "The list of the allowed client applications."]
-    #[serde(rename = "allowedClientApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedClientApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_client_applications: Vec<String>,
 }
 impl JwtClaimChecks {
@@ -6210,7 +6563,12 @@ pub struct Login {
     #[serde(rename = "preserveUrlFragmentsForLogins", default, skip_serializing_if = "Option::is_none")]
     pub preserve_url_fragments_for_logins: Option<bool>,
     #[doc = "External URLs that can be redirected to as part of logging in or logging out of the app. Note that the query string part of the URL is ignored.\nThis is an advanced setting typically only needed by Windows Store application backends.\nNote that URLs within the current domain are always implicitly allowed."]
-    #[serde(rename = "allowedExternalRedirectUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedExternalRedirectUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_external_redirect_urls: Vec<String>,
     #[doc = "The configuration settings of the session cookie's expiration."]
     #[serde(rename = "cookieExpiration", default, skip_serializing_if = "Option::is_none")]
@@ -6240,7 +6598,11 @@ impl LoginRoutes {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoginScopes {
     #[doc = "A list of the scopes that should be requested while authenticating."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl LoginScopes {
@@ -6312,7 +6674,11 @@ pub mod ms_deploy_log {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "List of log entry messages"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub entries: Vec<MsDeployLogEntry>,
     }
     impl Properties {
@@ -6480,15 +6846,33 @@ pub struct MetricSpecification {
     pub fill_gap_with_zero: Option<bool>,
     #[serde(rename = "isInternal", default, skip_serializing_if = "Option::is_none")]
     pub is_internal: Option<bool>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<MetricAvailability>,
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
 }
 impl MetricSpecification {
@@ -6660,10 +7044,20 @@ pub mod network_features {
         #[serde(rename = "virtualNetworkConnection", default, skip_serializing_if = "Option::is_none")]
         pub virtual_network_connection: Option<VnetInfo>,
         #[doc = "The Hybrid Connections summary view."]
-        #[serde(rename = "hybridConnections", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hybridConnections",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub hybrid_connections: Vec<RelayServiceConnectionEntity>,
         #[doc = "The Hybrid Connection V2 (Service Bus) view."]
-        #[serde(rename = "hybridConnectionsV2", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hybridConnectionsV2",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub hybrid_connections_v2: Vec<HybridConnection>,
     }
     impl Properties {
@@ -6759,7 +7153,11 @@ pub struct OpenIdConnectLogin {
     #[serde(rename = "nameClaimType", default, skip_serializing_if = "Option::is_none")]
     pub name_claim_type: Option<String>,
     #[doc = "A list of the scopes that should be requested while authenticating."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl OpenIdConnectLogin {
@@ -6798,7 +7196,11 @@ pub struct Operation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<operation::Status>,
     #[doc = "Any errors associate with the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ErrorEntity>,
     #[doc = "Time when operation has started."]
     #[serde(rename = "createdTime", default, with = "azure_core::date::rfc3339::option")]
@@ -6837,7 +7239,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that the App Service Environment reaches the service at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -6937,7 +7343,11 @@ pub struct PerfMonSet {
     #[serde(rename = "timeGrain", default, skip_serializing_if = "Option::is_none")]
     pub time_grain: Option<String>,
     #[doc = "Collection of workers that are active during this time."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<PerfMonSample>,
 }
 impl PerfMonSet {
@@ -7142,7 +7552,12 @@ pub mod private_access {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<bool>,
         #[doc = "The Virtual Networks (and subnets) allowed to access the site privately."]
-        #[serde(rename = "virtualNetworks", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "virtualNetworks",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub virtual_networks: Vec<PrivateAccessVirtualNetwork>,
     }
     impl Properties {
@@ -7179,7 +7594,11 @@ pub struct PrivateAccessVirtualNetwork {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "A List of subnets that access is allowed to on this Virtual Network. An empty array (but not null) is interpreted to mean that all subnets are allowed within this Virtual Network."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<PrivateAccessSubnet>,
 }
 impl PrivateAccessVirtualNetwork {
@@ -7278,10 +7697,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "RequiredMembers of a private link resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "RequiredZoneNames of a private link resource"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -7343,16 +7772,32 @@ pub mod process_info {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub parent: Option<String>,
         #[doc = "Child process list."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub children: Vec<String>,
         #[doc = "Thread list."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub threads: Vec<ProcessThreadInfo>,
         #[doc = "List of open files."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub open_file_handles: Vec<String>,
         #[doc = "List of modules."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub modules: Vec<ProcessModuleInfo>,
         #[doc = "File name of this process."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7765,7 +8210,11 @@ pub struct QueryUtterancesResults {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub query: Option<String>,
     #[doc = "Array of utterance results for search query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub results: Vec<QueryUtterancesResult>,
 }
 impl QueryUtterancesResults {
@@ -7853,7 +8302,12 @@ pub mod recommendation {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub channels: Option<properties::Channels>,
         #[doc = "The list of category tags that this recommendation belongs to."]
-        #[serde(rename = "categoryTags", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "categoryTags",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub category_tags: Vec<String>,
         #[doc = "Name of action recommended by this object."]
         #[serde(rename = "actionName", default, skip_serializing_if = "Option::is_none")]
@@ -7862,7 +8316,11 @@ pub mod recommendation {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<i32>,
         #[doc = "The list of states of this recommendation. If it's null then it should be considered \"Active\"."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub states: Vec<String>,
         #[doc = "The beginning time in UTC of a range that the recommendation refers to."]
         #[serde(rename = "startTime", default, with = "azure_core::date::rfc3339::option")]
@@ -8024,7 +8482,12 @@ pub mod recommendation_rule {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub channels: Option<properties::Channels>,
         #[doc = "The list of category tags that this recommendation rule belongs to."]
-        #[serde(rename = "categoryTags", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "categoryTags",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub category_tags: Vec<String>,
         #[doc = "True if this is associated with a dynamically added rule"]
         #[serde(rename = "isDynamic", default, skip_serializing_if = "Option::is_none")]
@@ -8171,7 +8634,12 @@ pub mod remote_private_endpoint_connection {
         #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
         pub private_link_service_connection_state: Option<PrivateLinkConnectionState>,
         #[doc = "Private IPAddresses mapped to the remote private endpoint"]
-        #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_addresses: Vec<String>,
     }
     impl Properties {
@@ -8208,7 +8676,12 @@ pub mod remote_private_endpoint_connection_arm_resource {
         #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
         pub private_link_service_connection_state: Option<PrivateLinkConnectionState>,
         #[doc = "Private IPAddresses mapped to the remote private endpoint"]
-        #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_addresses: Vec<String>,
     }
     impl Properties {
@@ -8463,7 +8936,12 @@ pub mod resource_metric_definition {
         #[serde(rename = "primaryAggregationType", default, skip_serializing_if = "Option::is_none")]
         pub primary_aggregation_type: Option<String>,
         #[doc = "List of time grains supported for the metric together with retention period."]
-        #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "metricAvailabilities",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub metric_availabilities: Vec<ResourceMetricAvailability>,
         #[doc = "Resource URI."]
         #[serde(rename = "resourceUri", default, skip_serializing_if = "Option::is_none")]
@@ -8672,7 +9150,11 @@ pub struct ResponseMessageEnvelopeRemotePrivateEndpointConnection {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<ManagedServiceIdentity>,
     #[doc = "Logical Availability Zones the service is hosted in"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResponseMessageEnvelopeRemotePrivateEndpointConnection {
@@ -8722,7 +9204,11 @@ pub mod restore_request {
         #[serde(rename = "siteName", default, skip_serializing_if = "Option::is_none")]
         pub site_name: Option<String>,
         #[doc = "Collection of databases which should be restored. This list has to match the list of databases included in the backup."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub databases: Vec<DatabaseBackupSetting>,
         #[doc = "Changes a logic when restoring an app with custom domains. <code>true</code> to remove custom domains automatically. If <code>false</code>, custom domains are added to \nthe app's object when it is being restored, but that might fail due to conflicts during the operation."]
         #[serde(rename = "ignoreConflictingHostNames", default, skip_serializing_if = "Option::is_none")]
@@ -8786,7 +9272,11 @@ pub struct SampleUtterance {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub text: Option<String>,
     #[doc = "Links attribute of sample utterance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<String>,
     #[doc = "Question id of sample utterance (for stackoverflow questions titles)."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8800,9 +9290,19 @@ impl SampleUtterance {
 #[doc = "Resource metrics service provided by Microsoft.Insights resource provider."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -8844,7 +9344,12 @@ pub mod site {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub state: Option<String>,
         #[doc = "Hostnames associated with the app."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Name of the repository site."]
         #[serde(rename = "repositorySiteName", default, skip_serializing_if = "Option::is_none")]
@@ -8856,13 +9361,23 @@ pub mod site {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<bool>,
         #[doc = "Enabled hostnames for the app.Hostnames need to be assigned (see HostNames) AND enabled. Otherwise,\nthe app is not served on those hostnames."]
-        #[serde(rename = "enabledHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "enabledHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub enabled_host_names: Vec<String>,
         #[doc = "Management information availability state for the app."]
         #[serde(rename = "availabilityState", default, skip_serializing_if = "Option::is_none")]
         pub availability_state: Option<properties::AvailabilityState>,
         #[doc = "Hostname SSL states are used to manage the SSL bindings for app's hostnames."]
-        #[serde(rename = "hostNameSslStates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNameSslStates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_name_ssl_states: Vec<HostNameSslState>,
         #[doc = "Resource ID of the associated App Service plan, formatted as: \"/subscriptions/{subscriptionID}/resourceGroups/{groupName}/providers/Microsoft.Web/serverfarms/{appServicePlanName}\"."]
         #[serde(rename = "serverFarmId", default, skip_serializing_if = "Option::is_none")]
@@ -8883,7 +9398,12 @@ pub mod site {
         #[serde(rename = "siteConfig", default, skip_serializing_if = "Option::is_none")]
         pub site_config: Option<SiteConfig>,
         #[doc = "Azure Traffic Manager hostnames associated with the app. Read-only."]
-        #[serde(rename = "trafficManagerHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "trafficManagerHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub traffic_manager_host_names: Vec<String>,
         #[doc = "<code>true</code> to stop SCM (KUDU) site when the app is stopped; otherwise, <code>false</code>. The default is <code>false</code>."]
         #[serde(rename = "scmSiteAlsoStopped", default, skip_serializing_if = "Option::is_none")]
@@ -9034,7 +9554,12 @@ pub mod site_auth_settings {
         #[serde(rename = "tokenStoreEnabled", default, skip_serializing_if = "Option::is_none")]
         pub token_store_enabled: Option<bool>,
         #[doc = "External URLs that can be redirected to as part of logging in or logging out of the app. Note that the query string part of the URL is ignored.\nThis is an advanced setting typically only needed by Windows Store application backends.\nNote that URLs within the current domain are always implicitly allowed."]
-        #[serde(rename = "allowedExternalRedirectUrls", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "allowedExternalRedirectUrls",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub allowed_external_redirect_urls: Vec<String>,
         #[doc = "The default authentication provider to use when multiple providers are configured.\nThis setting is only needed if multiple providers are configured and the unauthenticated client\naction is set to \"RedirectToLoginPage\"."]
         #[serde(rename = "defaultProvider", default, skip_serializing_if = "Option::is_none")]
@@ -9061,10 +9586,20 @@ pub mod site_auth_settings {
         #[serde(rename = "validateIssuer", default, skip_serializing_if = "Option::is_none")]
         pub validate_issuer: Option<bool>,
         #[doc = "Allowed audience values to consider when validating JWTs issued by \nAzure Active Directory. Note that the <code>ClientID</code> value is always considered an\nallowed audience, regardless of this setting."]
-        #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "allowedAudiences",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub allowed_audiences: Vec<String>,
         #[doc = "Login parameters to send to the OpenID Connect authorization endpoint when\na user logs in. Each parameter must be in the form \"key=value\"."]
-        #[serde(rename = "additionalLoginParams", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalLoginParams",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_login_params: Vec<String>,
         #[doc = "Gets a JSON string containing the Azure AD Acl settings."]
         #[serde(rename = "aadClaimsAuthorization", default, skip_serializing_if = "Option::is_none")]
@@ -9079,7 +9614,12 @@ pub mod site_auth_settings {
         #[serde(rename = "googleClientSecretSettingName", default, skip_serializing_if = "Option::is_none")]
         pub google_client_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of Google Sign-In authentication.\nThis setting is optional. If not specified, \"openid\", \"profile\", and \"email\" are used as default scopes.\nGoogle Sign-In documentation: https://developers.google.com/identity/sign-in/web/"]
-        #[serde(rename = "googleOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "googleOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub google_o_auth_scopes: Vec<String>,
         #[doc = "The App ID of the Facebook app used for login.\nThis setting is required for enabling Facebook Login.\nFacebook Login documentation: https://developers.facebook.com/docs/facebook-login"]
         #[serde(rename = "facebookAppId", default, skip_serializing_if = "Option::is_none")]
@@ -9091,7 +9631,12 @@ pub mod site_auth_settings {
         #[serde(rename = "facebookAppSecretSettingName", default, skip_serializing_if = "Option::is_none")]
         pub facebook_app_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of Facebook Login authentication.\nThis setting is optional.\nFacebook Login documentation: https://developers.facebook.com/docs/facebook-login"]
-        #[serde(rename = "facebookOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "facebookOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub facebook_o_auth_scopes: Vec<String>,
         #[doc = "The Client Id of the GitHub app used for login.\nThis setting is required for enabling Github login"]
         #[serde(rename = "gitHubClientId", default, skip_serializing_if = "Option::is_none")]
@@ -9103,7 +9648,12 @@ pub mod site_auth_settings {
         #[serde(rename = "gitHubClientSecretSettingName", default, skip_serializing_if = "Option::is_none")]
         pub git_hub_client_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of GitHub Login authentication.\nThis setting is optional"]
-        #[serde(rename = "gitHubOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "gitHubOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub git_hub_o_auth_scopes: Vec<String>,
         #[doc = "The OAuth 1.0a consumer key of the Twitter application used for sign-in.\nThis setting is required for enabling Twitter Sign-In.\nTwitter Sign-In documentation: https://dev.twitter.com/web/sign-in"]
         #[serde(rename = "twitterConsumerKey", default, skip_serializing_if = "Option::is_none")]
@@ -9128,7 +9678,12 @@ pub mod site_auth_settings {
         )]
         pub microsoft_account_client_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of Microsoft Account authentication.\nThis setting is optional. If not specified, \"wl.basic\" is used as the default scope.\nMicrosoft Account Scopes and permissions documentation: https://msdn.microsoft.com/en-us/library/dn631845.aspx"]
-        #[serde(rename = "microsoftAccountOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "microsoftAccountOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub microsoft_account_o_auth_scopes: Vec<String>,
         #[doc = "\"true\" if the auth config settings should be read from a file,\n\"false\" otherwise"]
         #[serde(rename = "isAuthFromFile", default, skip_serializing_if = "Option::is_none")]
@@ -9213,13 +9768,28 @@ pub struct SiteCloneability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub result: Option<site_cloneability::Result>,
     #[doc = "List of features enabled on app that prevent cloning."]
-    #[serde(rename = "blockingFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockingFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocking_features: Vec<SiteCloneabilityCriterion>,
     #[doc = "List of features enabled on app that are non-blocking but cannot be cloned. The app can still be cloned\nbut the features in this list will not be set up on cloned app."]
-    #[serde(rename = "unsupportedFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "unsupportedFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unsupported_features: Vec<SiteCloneabilityCriterion>,
     #[doc = "List of blocking application characteristics."]
-    #[serde(rename = "blockingCharacteristics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockingCharacteristics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocking_characteristics: Vec<SiteCloneabilityCriterion>,
 }
 impl SiteCloneability {
@@ -9259,7 +9829,12 @@ pub struct SiteConfig {
     #[serde(rename = "numberOfWorkers", default, skip_serializing_if = "Option::is_none")]
     pub number_of_workers: Option<i32>,
     #[doc = "Default documents."]
-    #[serde(rename = "defaultDocuments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultDocuments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_documents: Vec<String>,
     #[doc = ".NET Framework version."]
     #[serde(rename = "netFrameworkVersion", default, skip_serializing_if = "Option::is_none")]
@@ -9313,16 +9888,31 @@ pub struct SiteConfig {
     #[serde(rename = "publishingUsername", default, skip_serializing_if = "Option::is_none")]
     pub publishing_username: Option<String>,
     #[doc = "Application settings."]
-    #[serde(rename = "appSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_settings: Vec<NameValuePair>,
     #[doc = "Connection strings."]
-    #[serde(rename = "connectionStrings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionStrings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_strings: Vec<ConnStringInfo>,
     #[doc = "MachineKey of an app."]
     #[serde(rename = "machineKey", default, skip_serializing_if = "Option::is_none")]
     pub machine_key: Option<SiteMachineKey>,
     #[doc = "Handler mappings."]
-    #[serde(rename = "handlerMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "handlerMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub handler_mappings: Vec<HandlerMapping>,
     #[doc = "Document root."]
     #[serde(rename = "documentRoot", default, skip_serializing_if = "Option::is_none")]
@@ -9355,7 +9945,12 @@ pub struct SiteConfig {
     #[serde(rename = "managedPipelineMode", default, skip_serializing_if = "Option::is_none")]
     pub managed_pipeline_mode: Option<site_config::ManagedPipelineMode>,
     #[doc = "Virtual applications."]
-    #[serde(rename = "virtualApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_applications: Vec<VirtualApplication>,
     #[doc = "Site load balancing."]
     #[serde(rename = "loadBalancing", default, skip_serializing_if = "Option::is_none")]
@@ -9412,10 +10007,20 @@ pub struct SiteConfig {
     #[serde(rename = "keyVaultReferenceIdentity", default, skip_serializing_if = "Option::is_none")]
     pub key_vault_reference_identity: Option<String>,
     #[doc = "IP security restrictions for main."]
-    #[serde(rename = "ipSecurityRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipSecurityRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_security_restrictions: Vec<IpSecurityRestriction>,
     #[doc = "IP security restrictions for scm."]
-    #[serde(rename = "scmIpSecurityRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scmIpSecurityRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scm_ip_security_restrictions: Vec<IpSecurityRestriction>,
     #[doc = "IP security restrictions for scm to use main."]
     #[serde(rename = "scmIpSecurityRestrictionsUseMain", default, skip_serializing_if = "Option::is_none")]
@@ -9830,7 +10435,11 @@ pub mod site_extension_info {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub feed_url: Option<String>,
         #[doc = "List of authors."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub authors: Vec<String>,
         #[doc = "Installer command line parameters."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -9995,7 +10604,12 @@ pub mod site_patch_resource {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub state: Option<String>,
         #[doc = "Hostnames associated with the app."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Name of the repository site."]
         #[serde(rename = "repositorySiteName", default, skip_serializing_if = "Option::is_none")]
@@ -10007,13 +10621,23 @@ pub mod site_patch_resource {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<bool>,
         #[doc = "Enabled hostnames for the app.Hostnames need to be assigned (see HostNames) AND enabled. Otherwise,\nthe app is not served on those hostnames."]
-        #[serde(rename = "enabledHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "enabledHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub enabled_host_names: Vec<String>,
         #[doc = "Management information availability state for the app."]
         #[serde(rename = "availabilityState", default, skip_serializing_if = "Option::is_none")]
         pub availability_state: Option<properties::AvailabilityState>,
         #[doc = "Hostname SSL states are used to manage the SSL bindings for app's hostnames."]
-        #[serde(rename = "hostNameSslStates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNameSslStates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_name_ssl_states: Vec<HostNameSslState>,
         #[doc = "Resource ID of the associated App Service plan, formatted as: \"/subscriptions/{subscriptionID}/resourceGroups/{groupName}/providers/Microsoft.Web/serverfarms/{appServicePlanName}\"."]
         #[serde(rename = "serverFarmId", default, skip_serializing_if = "Option::is_none")]
@@ -10034,7 +10658,12 @@ pub mod site_patch_resource {
         #[serde(rename = "siteConfig", default, skip_serializing_if = "Option::is_none")]
         pub site_config: Option<SiteConfig>,
         #[doc = "Azure Traffic Manager hostnames associated with the app. Read-only."]
-        #[serde(rename = "trafficManagerHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "trafficManagerHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub traffic_manager_host_names: Vec<String>,
         #[doc = "<code>true</code> to stop SCM (KUDU) site when the app is stopped; otherwise, <code>false</code>. The default is <code>false</code>."]
         #[serde(rename = "scmSiteAlsoStopped", default, skip_serializing_if = "Option::is_none")]
@@ -10310,10 +10939,18 @@ pub struct SkuDescription {
     #[serde(rename = "skuCapacity", default, skip_serializing_if = "Option::is_none")]
     pub sku_capacity: Option<SkuCapacity>,
     #[doc = "Locations of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Capabilities of the SKU, e.g., is traffic manager enabled?"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
 }
 impl SkuDescription {
@@ -10366,7 +11003,11 @@ pub struct SkuInfos {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "List of SKUs the subscription is able to use."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skus: Vec<GlobalCsmSkuDescription>,
 }
 impl SkuInfos {
@@ -10378,13 +11019,28 @@ impl SkuInfos {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SlotConfigNames {
     #[doc = "List of connection string names."]
-    #[serde(rename = "connectionStringNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionStringNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_string_names: Vec<String>,
     #[doc = "List of application settings names."]
-    #[serde(rename = "appSettingNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appSettingNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_setting_names: Vec<String>,
     #[doc = "List of external Azure storage account identifiers."]
-    #[serde(rename = "azureStorageConfigNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureStorageConfigNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_storage_config_names: Vec<String>,
 }
 impl SlotConfigNames {
@@ -10645,10 +11301,18 @@ pub struct Solution {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<solution::Type>,
     #[doc = "Solution Data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<Vec<NameValuePair>>,
     #[doc = "Solution Metadata."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<Vec<NameValuePair>>,
 }
 impl Solution {
@@ -10737,7 +11401,12 @@ pub struct StackMajorVersion {
     #[serde(rename = "isDefault", default, skip_serializing_if = "Option::is_none")]
     pub is_default: Option<bool>,
     #[doc = "Minor versions associated with the major version."]
-    #[serde(rename = "minorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "minorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minor_versions: Vec<StackMinorVersion>,
     #[doc = "<code>true</code> if this supports Application Insights; otherwise, <code>false</code>."]
     #[serde(rename = "applicationInsights", default, skip_serializing_if = "Option::is_none")]
@@ -10885,7 +11554,12 @@ pub struct StaticSite {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub branch: Option<String>,
     #[doc = "The custom domains associated with this static site."]
-    #[serde(rename = "customDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_domains: Vec<String>,
     #[doc = "A user's github repository token. This is used to setup the Github Actions workflow file and API secrets."]
     #[serde(rename = "repositoryToken", default, skip_serializing_if = "Option::is_none")]
@@ -10894,7 +11568,12 @@ pub struct StaticSite {
     #[serde(rename = "buildProperties", default, skip_serializing_if = "Option::is_none")]
     pub build_properties: Option<StaticSiteBuildProperties>,
     #[doc = "Private endpoint connections"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ResponseMessageEnvelopeRemotePrivateEndpointConnection>,
     #[doc = "State indicating whether staging environments are allowed or not allowed for a static web app."]
     #[serde(rename = "stagingEnvironmentPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -10912,7 +11591,12 @@ pub struct StaticSite {
     #[serde(rename = "keyVaultReferenceIdentity", default, skip_serializing_if = "Option::is_none")]
     pub key_vault_reference_identity: Option<String>,
     #[doc = "User provided function apps registered with the static site"]
-    #[serde(rename = "userProvidedFunctionApps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userProvidedFunctionApps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_provided_function_apps: Vec<StaticSiteUserProvidedFunctionApp>,
     #[doc = "The provider that submitted the last deployment to the primary environment of the static site."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10998,7 +11682,12 @@ pub mod static_site_build_arm_resource {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub status: Option<properties::Status>,
         #[doc = "User provided function apps registered with the static site build"]
-        #[serde(rename = "userProvidedFunctionApps", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "userProvidedFunctionApps",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub user_provided_function_apps: Vec<StaticSiteUserProvidedFunctionApp>,
     }
     impl Properties {
@@ -11921,7 +12610,11 @@ pub struct StringList {
     #[serde(flatten)]
     pub proxy_only_resource: ProxyOnlyResource,
     #[doc = "List of string resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub properties: Vec<String>,
 }
 impl StringList {
@@ -12125,7 +12818,11 @@ pub mod triggered_job_history {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "List of triggered web job runs."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub runs: Vec<TriggeredJobRun>,
     }
     impl Properties {
@@ -12627,7 +13324,12 @@ pub struct VirtualApplication {
     #[serde(rename = "preloadEnabled", default, skip_serializing_if = "Option::is_none")]
     pub preload_enabled: Option<bool>,
     #[doc = "Virtual directories for virtual application."]
-    #[serde(rename = "virtualDirectories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualDirectories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_directories: Vec<VirtualDirectory>,
 }
 impl VirtualApplication {
@@ -12763,7 +13465,11 @@ pub mod vnet_info {
         #[serde(rename = "certBlob", default, skip_serializing_if = "Option::is_none")]
         pub cert_blob: Option<String>,
         #[doc = "The routes that this Virtual Network connection uses."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub routes: Vec<VnetRoute>,
         #[doc = "<code>true</code> if a resync is required; otherwise, <code>false</code>."]
         #[serde(rename = "resyncRequired", default, skip_serializing_if = "Option::is_none")]
@@ -12925,10 +13631,19 @@ pub mod vnet_validation_failure_details {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub failed: Option<bool>,
         #[doc = "A list of tests that failed in the validation."]
-        #[serde(rename = "failedTests", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "failedTests",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub failed_tests: Vec<VnetValidationTestFailure>,
         #[doc = "A list of warnings generated during validation."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub warnings: Vec<VnetValidationTestFailure>,
     }
     impl Properties {
@@ -13019,7 +13734,12 @@ pub struct WebAppMajorVersion {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     #[doc = "Minor versions associated with the major version."]
-    #[serde(rename = "minorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "minorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minor_versions: Vec<WebAppMinorVersion>,
 }
 impl WebAppMajorVersion {
@@ -13134,7 +13854,12 @@ pub mod web_app_stack {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub value: Option<String>,
         #[doc = "List of major versions available."]
-        #[serde(rename = "majorVersions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "majorVersions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub major_versions: Vec<WebAppMajorVersion>,
         #[doc = "Web App stack preferred OS."]
         #[serde(rename = "preferredOs", default, skip_serializing_if = "Option::is_none")]
@@ -13353,7 +14078,12 @@ pub struct WorkerPool {
     #[serde(rename = "workerCount", default, skip_serializing_if = "Option::is_none")]
     pub worker_count: Option<i32>,
     #[doc = "Names of all instances in the worker pool (read only)."]
-    #[serde(rename = "instanceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "instanceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instance_names: Vec<String>,
 }
 impl WorkerPool {
diff --git a/services/mgmt/web/src/package_2021_01_15/models.rs b/services/mgmt/web/src/package_2021_01_15/models.rs
index 0f0425acc3..b36c5d3abe 100644
--- a/services/mgmt/web/src/package_2021_01_15/models.rs
+++ b/services/mgmt/web/src/package_2021_01_15/models.rs
@@ -13,10 +13,18 @@ pub struct AbnormalTimePeriod {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "List of Possible Cause of downtime"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<DetectorAbnormalTimePeriod>,
     #[doc = "List of proposed solutions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub solutions: Vec<Solution>,
 }
 impl AbnormalTimePeriod {
@@ -80,10 +88,20 @@ pub mod address_response {
         #[serde(rename = "internalIpAddress", default, skip_serializing_if = "Option::is_none")]
         pub internal_ip_address: Option<String>,
         #[doc = "IP addresses appearing on outbound connections."]
-        #[serde(rename = "outboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "outboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub outbound_ip_addresses: Vec<String>,
         #[doc = "Additional virtual IPs."]
-        #[serde(rename = "vipMappings", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "vipMappings",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub vip_mappings: Vec<VirtualIpMapping>,
     }
     impl Properties {
@@ -96,7 +114,12 @@ pub mod address_response {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedAudiencesValidation {
     #[doc = "The configuration settings of the allowed list of audiences from which to validate the JWT token."]
-    #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAudiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_audiences: Vec<String>,
 }
 impl AllowedAudiencesValidation {
@@ -114,10 +137,18 @@ pub struct AnalysisData {
     #[serde(rename = "detectorDefinition", default, skip_serializing_if = "Option::is_none")]
     pub detector_definition: Option<DetectorDefinition>,
     #[doc = "Source Metrics"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<DiagnosticMetricSet>,
     #[doc = "Additional Source Data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<Vec<NameValuePair>>,
     #[serde(rename = "detectorMetaData", default, skip_serializing_if = "Option::is_none")]
     pub detector_meta_data: Option<ResponseMetaData>,
@@ -441,6 +472,7 @@ pub mod app_service_certificate_order {
         #[serde(
             rename = "appServiceCertificateNotRenewableReasons",
             default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
             skip_serializing_if = "Vec::is_empty"
         )]
         pub app_service_certificate_not_renewable_reasons: Vec<String>,
@@ -603,6 +635,7 @@ pub mod app_service_certificate_order_patch_resource {
         #[serde(
             rename = "appServiceCertificateNotRenewableReasons",
             default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
             skip_serializing_if = "Vec::is_empty"
         )]
         pub app_service_certificate_not_renewable_reasons: Vec<String>,
@@ -739,10 +772,20 @@ pub struct AppServiceEnvironment {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub suspended: Option<bool>,
     #[doc = "Custom settings for changing the behavior of the App Service Environment."]
-    #[serde(rename = "clusterSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_settings: Vec<NameValuePair>,
     #[doc = "User added ip ranges to whitelist on ASE db"]
-    #[serde(rename = "userWhitelistedIpRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userWhitelistedIpRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_whitelisted_ip_ranges: Vec<String>,
     #[doc = "Flag that displays whether an ASE has linux workers or not"]
     #[serde(rename = "hasLinuxWorkers", default, skip_serializing_if = "Option::is_none")]
@@ -1196,13 +1239,27 @@ pub struct ApplicationStack {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub dependency: Option<String>,
     #[doc = "List of major versions available."]
-    #[serde(rename = "majorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "majorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub major_versions: Vec<StackMajorVersion>,
     #[doc = "List of frameworks associated with application stack."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frameworks: Vec<ApplicationStack>,
     #[doc = "<code>true</code> if this is the stack is deprecated; otherwise, <code>false</code>."]
-    #[serde(rename = "isDeprecated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "isDeprecated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub is_deprecated: Vec<ApplicationStack>,
 }
 impl ApplicationStack {
@@ -1365,9 +1422,19 @@ pub mod ase_v3_networking_configuration {
     #[doc = "AseV3NetworkingConfiguration resource specific properties"]
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
-        #[serde(rename = "windowsOutboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "windowsOutboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub windows_outbound_ip_addresses: Vec<String>,
-        #[serde(rename = "linuxOutboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "linuxOutboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub linux_outbound_ip_addresses: Vec<String>,
         #[doc = "Property to enable and disable new private endpoint connection creation on ASE"]
         #[serde(rename = "allowNewPrivateEndpointConnections", default, skip_serializing_if = "Option::is_none")]
@@ -1465,16 +1532,31 @@ pub struct AutoHealTriggers {
     #[serde(rename = "privateBytesInKB", default, skip_serializing_if = "Option::is_none")]
     pub private_bytes_in_kb: Option<i32>,
     #[doc = "A rule based on status codes."]
-    #[serde(rename = "statusCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_codes: Vec<StatusCodesBasedTrigger>,
     #[doc = "Trigger based on request execution time."]
     #[serde(rename = "slowRequests", default, skip_serializing_if = "Option::is_none")]
     pub slow_requests: Option<SlowRequestsBasedTrigger>,
     #[doc = "A rule based on multiple Slow Requests Rule with path"]
-    #[serde(rename = "slowRequestsWithPath", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "slowRequestsWithPath",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub slow_requests_with_path: Vec<SlowRequestsBasedTrigger>,
     #[doc = "A rule based on status codes ranges."]
-    #[serde(rename = "statusCodesRange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusCodesRange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_codes_range: Vec<StatusCodesRangeBasedTrigger>,
 }
 impl AutoHealTriggers {
@@ -1510,7 +1592,12 @@ impl AzureActiveDirectory {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureActiveDirectoryLogin {
     #[doc = "Login parameters to send to the OpenID Connect authorization endpoint when\na user logs in. Each parameter must be in the form \"key=value\"."]
-    #[serde(rename = "loginParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_parameters: Vec<String>,
     #[doc = "<code>true</code> if the www-authenticate provider should be omitted from the request; otherwise, <code>false</code>."]
     #[serde(rename = "disableWWWAuthenticate", default, skip_serializing_if = "Option::is_none")]
@@ -1559,7 +1646,12 @@ pub struct AzureActiveDirectoryValidation {
     #[serde(rename = "jwtClaimChecks", default, skip_serializing_if = "Option::is_none")]
     pub jwt_claim_checks: Option<JwtClaimChecks>,
     #[doc = "The list of audiences that can make successful authentication/authorization requests."]
-    #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAudiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_audiences: Vec<String>,
 }
 impl AzureActiveDirectoryValidation {
@@ -1771,7 +1863,11 @@ pub mod backup_item {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub log: Option<String>,
         #[doc = "List of databases included in the backup."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub databases: Vec<DatabaseBackupSetting>,
         #[doc = "True if this backup has been created due to a schedule being triggered."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1864,7 +1960,11 @@ pub mod backup_request {
         #[serde(rename = "backupSchedule", default, skip_serializing_if = "Option::is_none")]
         pub backup_schedule: Option<BackupSchedule>,
         #[doc = "Databases included in the backup."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub databases: Vec<DatabaseBackupSetting>,
     }
     impl Properties {
@@ -2061,7 +2161,12 @@ pub mod certificate {
         #[serde(rename = "subjectName", default, skip_serializing_if = "Option::is_none")]
         pub subject_name: Option<String>,
         #[doc = "Host names the certificate applies to."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Pfx blob."]
         #[serde(rename = "pfxBlob", default, skip_serializing_if = "Option::is_none")]
@@ -2325,7 +2430,12 @@ pub mod certificate_patch_resource {
         #[serde(rename = "subjectName", default, skip_serializing_if = "Option::is_none")]
         pub subject_name: Option<String>,
         #[doc = "Host names the certificate applies to."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Pfx blob."]
         #[serde(rename = "pfxBlob", default, skip_serializing_if = "Option::is_none")]
@@ -2624,7 +2734,12 @@ impl ContainerCpuStatistics {
 pub struct ContainerCpuUsage {
     #[serde(rename = "totalUsage", default, skip_serializing_if = "Option::is_none")]
     pub total_usage: Option<i64>,
-    #[serde(rename = "perCpuUsage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "perCpuUsage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub per_cpu_usage: Vec<i64>,
     #[serde(rename = "kernelModeUsage", default, skip_serializing_if = "Option::is_none")]
     pub kernel_mode_usage: Option<i64>,
@@ -2834,7 +2949,12 @@ pub mod cookie_expiration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CorsSettings {
     #[doc = "Gets or sets the list of origins that should be allowed to make cross-origin\ncalls (for example: http://example.com:12345). Use \"*\" to allow all."]
-    #[serde(rename = "allowedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_origins: Vec<String>,
     #[doc = "Gets or sets whether CORS requests with credentials are allowed. See \nhttps://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#Requests_with_credentials\nfor more details."]
     #[serde(rename = "supportCredentials", default, skip_serializing_if = "Option::is_none")]
@@ -2850,7 +2970,11 @@ impl CorsSettings {
 pub struct CsmMoveResourceEnvelope {
     #[serde(rename = "targetResourceGroup", default, skip_serializing_if = "Option::is_none")]
     pub target_resource_group: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
 }
 impl CsmMoveResourceEnvelope {
@@ -3113,19 +3237,44 @@ pub mod custom_hostname_analysis_result {
         #[serde(rename = "conflictingAppResourceId", default, skip_serializing_if = "Option::is_none")]
         pub conflicting_app_resource_id: Option<String>,
         #[doc = "CName records controller can see for this hostname."]
-        #[serde(rename = "cNameRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "cNameRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub c_name_records: Vec<String>,
         #[doc = "TXT records controller can see for this hostname."]
-        #[serde(rename = "txtRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "txtRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub txt_records: Vec<String>,
         #[doc = "A records controller can see for this hostname."]
-        #[serde(rename = "aRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "aRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub a_records: Vec<String>,
         #[doc = "Alternate CName records controller can see for this hostname."]
-        #[serde(rename = "alternateCNameRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "alternateCNameRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub alternate_c_name_records: Vec<String>,
         #[doc = "Alternate TXT records controller can see for this hostname."]
-        #[serde(rename = "alternateTxtRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "alternateTxtRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub alternate_txt_records: Vec<String>,
     }
     impl Properties {
@@ -3168,7 +3317,12 @@ pub struct DataProviderMetadata {
     #[serde(rename = "providerName", default, skip_serializing_if = "Option::is_none")]
     pub provider_name: Option<String>,
     #[doc = "Settings for the data provider"]
-    #[serde(rename = "propertyBag", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyBag",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_bag: Vec<KeyValuePairStringObject>,
 }
 impl DataProviderMetadata {
@@ -3180,10 +3334,19 @@ impl DataProviderMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataSource {
     #[doc = "Instructions if any for the data source"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instructions: Vec<String>,
     #[doc = "Datasource Uri Links"]
-    #[serde(rename = "dataSourceUri", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSourceUri",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_source_uri: Vec<NameValuePair>,
 }
 impl DataSource {
@@ -3216,10 +3379,18 @@ pub struct DataTableResponseObject {
     #[serde(rename = "tableName", default, skip_serializing_if = "Option::is_none")]
     pub table_name: Option<String>,
     #[doc = "List of columns with data types"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<DataTableResponseColumn>,
     #[doc = "Raw row values"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rows: Vec<Vec<String>>,
 }
 impl DataTableResponseObject {
@@ -3328,7 +3499,11 @@ pub mod default_error_response {
         #[doc = "Detailed error description and debugging information."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<serde_json::Value>,
         #[doc = "More information to debug error."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3525,13 +3700,27 @@ impl DeploymentCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeploymentLocations {
     #[doc = "Available regions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<GeoRegion>,
     #[doc = "Available App Service Environments with full descriptions of the environments."]
-    #[serde(rename = "hostingEnvironments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostingEnvironments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosting_environments: Vec<AppServiceEnvironment>,
     #[doc = "Available App Service Environments with basic information."]
-    #[serde(rename = "hostingEnvironmentDeploymentInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostingEnvironmentDeploymentInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosting_environment_deployment_infos: Vec<HostingEnvironmentDeploymentInfo>,
 }
 impl DeploymentLocations {
@@ -3558,13 +3747,22 @@ pub struct DetectorAbnormalTimePeriod {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub priority: Option<f64>,
     #[doc = "Downtime metadata"]
-    #[serde(rename = "metaData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metaData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meta_data: Vec<Vec<NameValuePair>>,
     #[doc = "Represents the type of the Detector"]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<detector_abnormal_time_period::Type>,
     #[doc = "List of proposed solutions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub solutions: Vec<Solution>,
 }
 impl DetectorAbnormalTimePeriod {
@@ -3644,10 +3842,20 @@ pub struct DetectorInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "List of Support Topics for which this detector is enabled."]
-    #[serde(rename = "supportTopicList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportTopicList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub support_topic_list: Vec<SupportTopic>,
     #[doc = "Analysis Types for which this detector should apply to."]
-    #[serde(rename = "analysisType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "analysisType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub analysis_type: Vec<String>,
     #[doc = "Whether this detector is an Analysis Detector or not."]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
@@ -3694,13 +3902,22 @@ pub mod detector_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub metadata: Option<DetectorInfo>,
         #[doc = "Data Set"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub dataset: Vec<DiagnosticData>,
         #[doc = "Identify the status of the most severe insight generated by the detector."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub status: Option<Status>,
         #[doc = "Additional configuration for different data providers to be used by the UI"]
-        #[serde(rename = "dataProvidersMetadata", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "dataProvidersMetadata",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub data_providers_metadata: Vec<DataProviderMetadata>,
         #[doc = "Suggested utterances where the detector can be applicable"]
         #[serde(rename = "suggestedUtterances", default, skip_serializing_if = "Option::is_none")]
@@ -3758,13 +3975,27 @@ pub mod diagnostic_analysis {
         #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
         pub end_time: Option<time::OffsetDateTime>,
         #[doc = "List of time periods."]
-        #[serde(rename = "abnormalTimePeriods", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "abnormalTimePeriods",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub abnormal_time_periods: Vec<AbnormalTimePeriod>,
         #[doc = "Data by each detector"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub payload: Vec<AnalysisData>,
         #[doc = "Data by each detector for detectors that did not corelate"]
-        #[serde(rename = "nonCorrelatedDetectors", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "nonCorrelatedDetectors",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub non_correlated_detectors: Vec<DetectorDefinition>,
     }
     impl Properties {
@@ -3909,13 +4140,26 @@ pub mod diagnostic_detector_response {
         #[serde(rename = "detectorDefinition", default, skip_serializing_if = "Option::is_none")]
         pub detector_definition: Option<DetectorDefinition>,
         #[doc = "Metrics provided by the detector"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub metrics: Vec<DiagnosticMetricSet>,
         #[doc = "List of Correlated events found by the detector"]
-        #[serde(rename = "abnormalTimePeriods", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "abnormalTimePeriods",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub abnormal_time_periods: Vec<DetectorAbnormalTimePeriod>,
         #[doc = "Additional Data that detector wants to send."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub data: Vec<Vec<NameValuePair>>,
         #[serde(rename = "responseMetaData", default, skip_serializing_if = "Option::is_none")]
         pub response_meta_data: Option<ResponseMetaData>,
@@ -3972,7 +4216,11 @@ pub struct DiagnosticMetricSet {
     #[serde(rename = "timeGrain", default, skip_serializing_if = "Option::is_none")]
     pub time_grain: Option<String>,
     #[doc = "Collection of metric values for the selected period based on the {Microsoft.Web.Hosting.Administration.DiagnosticMetricSet.TimeGrain}"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<DiagnosticMetricSample>,
 }
 impl DiagnosticMetricSet {
@@ -4038,7 +4286,12 @@ pub mod domain {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<properties::ProvisioningState>,
         #[doc = "Name servers."]
-        #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "nameServers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub name_servers: Vec<String>,
         #[doc = "<code>true</code> if domain privacy is enabled for this domain; otherwise, <code>false</code>."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4059,12 +4312,22 @@ pub mod domain {
         #[serde(rename = "readyForDnsRecordManagement", default, skip_serializing_if = "Option::is_none")]
         pub ready_for_dns_record_management: Option<bool>,
         #[doc = "All hostnames derived from the domain and assigned to Azure resources."]
-        #[serde(rename = "managedHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "managedHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub managed_host_names: Vec<HostName>,
         #[doc = "Domain purchase consent object, representing acceptance of applicable legal agreements."]
         pub consent: DomainPurchaseConsent,
         #[doc = "Reasons why domain is not renewable."]
-        #[serde(rename = "domainNotRenewableReasons", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "domainNotRenewableReasons",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub domain_not_renewable_reasons: Vec<String>,
         #[doc = "Current DNS type"]
         #[serde(rename = "dnsType", default, skip_serializing_if = "Option::is_none")]
@@ -4312,7 +4575,12 @@ pub mod domain_patch_resource {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<properties::ProvisioningState>,
         #[doc = "Name servers."]
-        #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "nameServers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub name_servers: Vec<String>,
         #[doc = "<code>true</code> if domain privacy is enabled for this domain; otherwise, <code>false</code>."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4333,12 +4601,22 @@ pub mod domain_patch_resource {
         #[serde(rename = "readyForDnsRecordManagement", default, skip_serializing_if = "Option::is_none")]
         pub ready_for_dns_record_management: Option<bool>,
         #[doc = "All hostnames derived from the domain and assigned to Azure resources."]
-        #[serde(rename = "managedHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "managedHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub managed_host_names: Vec<HostName>,
         #[doc = "Domain purchase consent object, representing acceptance of applicable legal agreements."]
         pub consent: DomainPurchaseConsent,
         #[doc = "Reasons why domain is not renewable."]
-        #[serde(rename = "domainNotRenewableReasons", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "domainNotRenewableReasons",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub domain_not_renewable_reasons: Vec<String>,
         #[doc = "Current DNS type"]
         #[serde(rename = "dnsType", default, skip_serializing_if = "Option::is_none")]
@@ -4438,7 +4716,12 @@ pub mod domain_patch_resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainPurchaseConsent {
     #[doc = "List of applicable legal agreement keys. This list can be retrieved using ListLegalAgreements API under <code>TopLevelDomain</code> resource."]
-    #[serde(rename = "agreementKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agreementKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agreement_keys: Vec<String>,
     #[doc = "Client IP address."]
     #[serde(rename = "agreedBy", default, skip_serializing_if = "Option::is_none")]
@@ -4486,7 +4769,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The IP Addresses and Ports used when connecting to DomainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -4525,10 +4813,19 @@ pub struct ErrorEntity {
     #[serde(rename = "messageTemplate", default, skip_serializing_if = "Option::is_none")]
     pub message_template: Option<String>,
     #[doc = "Parameters for the template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<String>,
     #[doc = "Inner errors."]
-    #[serde(rename = "innerErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "innerErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inner_errors: Vec<ErrorEntity>,
     #[doc = "Basic error code."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4546,7 +4843,12 @@ impl ErrorEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Experiments {
     #[doc = "List of ramp-up rules."]
-    #[serde(rename = "rampUpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rampUpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ramp_up_rules: Vec<RampUpRule>,
 }
 impl Experiments {
@@ -4705,7 +5007,12 @@ pub struct FunctionAppMajorVersion {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     #[doc = "Minor versions associated with the major version."]
-    #[serde(rename = "minorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "minorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minor_versions: Vec<FunctionAppMinorVersion>,
 }
 impl FunctionAppMajorVersion {
@@ -4753,7 +5060,12 @@ pub struct FunctionAppRuntimeSettings {
     #[serde(rename = "siteConfigPropertiesDictionary", default, skip_serializing_if = "Option::is_none")]
     pub site_config_properties_dictionary: Option<SiteConfigPropertiesDictionary>,
     #[doc = "List of supported Functions extension versions."]
-    #[serde(rename = "supportedFunctionsExtensionVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFunctionsExtensionVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_functions_extension_versions: Vec<String>,
     #[doc = "<code>true</code> if the stack is in preview; otherwise, <code>false</code>."]
     #[serde(rename = "isPreview", default, skip_serializing_if = "Option::is_none")]
@@ -4826,7 +5138,12 @@ pub mod function_app_stack {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub value: Option<String>,
         #[doc = "List of major versions available."]
-        #[serde(rename = "majorVersions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "majorVersions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub major_versions: Vec<FunctionAppMajorVersion>,
         #[doc = "Function App stack preferred OS."]
         #[serde(rename = "preferredOs", default, skip_serializing_if = "Option::is_none")]
@@ -5131,10 +5448,18 @@ pub struct GlobalCsmSkuDescription {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<SkuCapacity>,
     #[doc = "Locations of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Capabilities of the SKU, e.g., is traffic manager enabled?"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
 }
 impl GlobalCsmSkuDescription {
@@ -5155,7 +5480,12 @@ pub struct GlobalValidation {
     #[serde(rename = "redirectToProvider", default, skip_serializing_if = "Option::is_none")]
     pub redirect_to_provider: Option<String>,
     #[doc = "The paths for which unauthenticated flow would not be redirected to the login page."]
-    #[serde(rename = "excludedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_paths: Vec<String>,
 }
 impl GlobalValidation {
@@ -5238,7 +5568,12 @@ pub struct HostName {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of apps the hostname is assigned to. This list will have more than one app only if the hostname is pointing to a Traffic Manager."]
-    #[serde(rename = "siteNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "siteNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub site_names: Vec<String>,
     #[doc = "Name of the Azure resource the hostname is assigned to. If it is assigned to a Traffic Manager then it will be the Traffic Manager name otherwise it will be the app name."]
     #[serde(rename = "azureResourceName", default, skip_serializing_if = "Option::is_none")]
@@ -5742,10 +6077,18 @@ pub struct InboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The IP addresses that network traffic will originate from in cidr notation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<String>,
     #[doc = "The ports that network traffic will arrive to the App Service Environment at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<String>,
 }
 impl InboundEnvironmentEndpoint {
@@ -5861,10 +6204,20 @@ pub mod ip_security_restriction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JwtClaimChecks {
     #[doc = "The list of the allowed groups."]
-    #[serde(rename = "allowedGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_groups: Vec<String>,
     #[doc = "The list of the allowed client applications."]
-    #[serde(rename = "allowedClientApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedClientApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_client_applications: Vec<String>,
 }
 impl JwtClaimChecks {
@@ -6183,7 +6536,12 @@ pub struct Login {
     #[serde(rename = "preserveUrlFragmentsForLogins", default, skip_serializing_if = "Option::is_none")]
     pub preserve_url_fragments_for_logins: Option<bool>,
     #[doc = "External URLs that can be redirected to as part of logging in or logging out of the app. Note that the query string part of the URL is ignored.\nThis is an advanced setting typically only needed by Windows Store application backends.\nNote that URLs within the current domain are always implicitly allowed."]
-    #[serde(rename = "allowedExternalRedirectUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedExternalRedirectUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_external_redirect_urls: Vec<String>,
     #[doc = "The configuration settings of the session cookie's expiration."]
     #[serde(rename = "cookieExpiration", default, skip_serializing_if = "Option::is_none")]
@@ -6213,7 +6571,11 @@ impl LoginRoutes {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoginScopes {
     #[doc = "A list of the scopes that should be requested while authenticating."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl LoginScopes {
@@ -6285,7 +6647,11 @@ pub mod ms_deploy_log {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "List of log entry messages"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub entries: Vec<MsDeployLogEntry>,
     }
     impl Properties {
@@ -6453,15 +6819,33 @@ pub struct MetricSpecification {
     pub fill_gap_with_zero: Option<bool>,
     #[serde(rename = "isInternal", default, skip_serializing_if = "Option::is_none")]
     pub is_internal: Option<bool>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<MetricAvailability>,
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
 }
 impl MetricSpecification {
@@ -6633,10 +7017,20 @@ pub mod network_features {
         #[serde(rename = "virtualNetworkConnection", default, skip_serializing_if = "Option::is_none")]
         pub virtual_network_connection: Option<VnetInfo>,
         #[doc = "The Hybrid Connections summary view."]
-        #[serde(rename = "hybridConnections", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hybridConnections",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub hybrid_connections: Vec<RelayServiceConnectionEntity>,
         #[doc = "The Hybrid Connection V2 (Service Bus) view."]
-        #[serde(rename = "hybridConnectionsV2", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hybridConnectionsV2",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub hybrid_connections_v2: Vec<HybridConnection>,
     }
     impl Properties {
@@ -6732,7 +7126,11 @@ pub struct OpenIdConnectLogin {
     #[serde(rename = "nameClaimType", default, skip_serializing_if = "Option::is_none")]
     pub name_claim_type: Option<String>,
     #[doc = "A list of the scopes that should be requested while authenticating."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl OpenIdConnectLogin {
@@ -6771,7 +7169,11 @@ pub struct Operation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<operation::Status>,
     #[doc = "Any errors associate with the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ErrorEntity>,
     #[doc = "Time when operation has started."]
     #[serde(rename = "createdTime", default, with = "azure_core::date::rfc3339::option")]
@@ -6810,7 +7212,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that the App Service Environment reaches the service at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -6910,7 +7316,11 @@ pub struct PerfMonSet {
     #[serde(rename = "timeGrain", default, skip_serializing_if = "Option::is_none")]
     pub time_grain: Option<String>,
     #[doc = "Collection of workers that are active during this time."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<PerfMonSample>,
 }
 impl PerfMonSet {
@@ -7115,7 +7525,12 @@ pub mod private_access {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<bool>,
         #[doc = "The Virtual Networks (and subnets) allowed to access the site privately."]
-        #[serde(rename = "virtualNetworks", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "virtualNetworks",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub virtual_networks: Vec<PrivateAccessVirtualNetwork>,
     }
     impl Properties {
@@ -7152,7 +7567,11 @@ pub struct PrivateAccessVirtualNetwork {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "A List of subnets that access is allowed to on this Virtual Network. An empty array (but not null) is interpreted to mean that all subnets are allowed within this Virtual Network."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<PrivateAccessSubnet>,
 }
 impl PrivateAccessVirtualNetwork {
@@ -7251,10 +7670,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "RequiredMembers of a private link resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "RequiredZoneNames of a private link resource"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -7316,16 +7745,32 @@ pub mod process_info {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub parent: Option<String>,
         #[doc = "Child process list."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub children: Vec<String>,
         #[doc = "Thread list."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub threads: Vec<ProcessThreadInfo>,
         #[doc = "List of open files."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub open_file_handles: Vec<String>,
         #[doc = "List of modules."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub modules: Vec<ProcessModuleInfo>,
         #[doc = "File name of this process."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7758,7 +8203,11 @@ pub struct QueryUtterancesResults {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub query: Option<String>,
     #[doc = "Array of utterance results for search query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub results: Vec<QueryUtterancesResult>,
 }
 impl QueryUtterancesResults {
@@ -7846,7 +8295,12 @@ pub mod recommendation {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub channels: Option<properties::Channels>,
         #[doc = "The list of category tags that this recommendation belongs to."]
-        #[serde(rename = "categoryTags", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "categoryTags",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub category_tags: Vec<String>,
         #[doc = "Name of action recommended by this object."]
         #[serde(rename = "actionName", default, skip_serializing_if = "Option::is_none")]
@@ -7855,7 +8309,11 @@ pub mod recommendation {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<i32>,
         #[doc = "The list of states of this recommendation. If it's null then it should be considered \"Active\"."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub states: Vec<String>,
         #[doc = "The beginning time in UTC of a range that the recommendation refers to."]
         #[serde(rename = "startTime", default, with = "azure_core::date::rfc3339::option")]
@@ -8017,7 +8475,12 @@ pub mod recommendation_rule {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub channels: Option<properties::Channels>,
         #[doc = "The list of category tags that this recommendation rule belongs to."]
-        #[serde(rename = "categoryTags", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "categoryTags",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub category_tags: Vec<String>,
         #[doc = "True if this is associated with a dynamically added rule"]
         #[serde(rename = "isDynamic", default, skip_serializing_if = "Option::is_none")]
@@ -8164,7 +8627,12 @@ pub mod remote_private_endpoint_connection {
         #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
         pub private_link_service_connection_state: Option<PrivateLinkConnectionState>,
         #[doc = "Private IPAddresses mapped to the remote private endpoint"]
-        #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_addresses: Vec<String>,
     }
     impl Properties {
@@ -8201,7 +8669,12 @@ pub mod remote_private_endpoint_connection_arm_resource {
         #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
         pub private_link_service_connection_state: Option<PrivateLinkConnectionState>,
         #[doc = "Private IPAddresses mapped to the remote private endpoint"]
-        #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_addresses: Vec<String>,
     }
     impl Properties {
@@ -8456,7 +8929,12 @@ pub mod resource_metric_definition {
         #[serde(rename = "primaryAggregationType", default, skip_serializing_if = "Option::is_none")]
         pub primary_aggregation_type: Option<String>,
         #[doc = "List of time grains supported for the metric together with retention period."]
-        #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "metricAvailabilities",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub metric_availabilities: Vec<ResourceMetricAvailability>,
         #[doc = "Resource URI."]
         #[serde(rename = "resourceUri", default, skip_serializing_if = "Option::is_none")]
@@ -8665,7 +9143,11 @@ pub struct ResponseMessageEnvelopeRemotePrivateEndpointConnection {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<ManagedServiceIdentity>,
     #[doc = "Logical Availability Zones the service is hosted in"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResponseMessageEnvelopeRemotePrivateEndpointConnection {
@@ -8715,7 +9197,11 @@ pub mod restore_request {
         #[serde(rename = "siteName", default, skip_serializing_if = "Option::is_none")]
         pub site_name: Option<String>,
         #[doc = "Collection of databases which should be restored. This list has to match the list of databases included in the backup."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub databases: Vec<DatabaseBackupSetting>,
         #[doc = "Changes a logic when restoring an app with custom domains. <code>true</code> to remove custom domains automatically. If <code>false</code>, custom domains are added to \nthe app's object when it is being restored, but that might fail due to conflicts during the operation."]
         #[serde(rename = "ignoreConflictingHostNames", default, skip_serializing_if = "Option::is_none")]
@@ -8779,7 +9265,11 @@ pub struct SampleUtterance {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub text: Option<String>,
     #[doc = "Links attribute of sample utterance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<String>,
     #[doc = "Question id of sample utterance (for stackoverflow questions titles)."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8793,9 +9283,19 @@ impl SampleUtterance {
 #[doc = "Resource metrics service provided by Microsoft.Insights resource provider."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -8837,7 +9337,12 @@ pub mod site {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub state: Option<String>,
         #[doc = "Hostnames associated with the app."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Name of the repository site."]
         #[serde(rename = "repositorySiteName", default, skip_serializing_if = "Option::is_none")]
@@ -8849,13 +9354,23 @@ pub mod site {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<bool>,
         #[doc = "Enabled hostnames for the app.Hostnames need to be assigned (see HostNames) AND enabled. Otherwise,\nthe app is not served on those hostnames."]
-        #[serde(rename = "enabledHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "enabledHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub enabled_host_names: Vec<String>,
         #[doc = "Management information availability state for the app."]
         #[serde(rename = "availabilityState", default, skip_serializing_if = "Option::is_none")]
         pub availability_state: Option<properties::AvailabilityState>,
         #[doc = "Hostname SSL states are used to manage the SSL bindings for app's hostnames."]
-        #[serde(rename = "hostNameSslStates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNameSslStates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_name_ssl_states: Vec<HostNameSslState>,
         #[doc = "Resource ID of the associated App Service plan, formatted as: \"/subscriptions/{subscriptionID}/resourceGroups/{groupName}/providers/Microsoft.Web/serverfarms/{appServicePlanName}\"."]
         #[serde(rename = "serverFarmId", default, skip_serializing_if = "Option::is_none")]
@@ -8876,7 +9391,12 @@ pub mod site {
         #[serde(rename = "siteConfig", default, skip_serializing_if = "Option::is_none")]
         pub site_config: Option<SiteConfig>,
         #[doc = "Azure Traffic Manager hostnames associated with the app. Read-only."]
-        #[serde(rename = "trafficManagerHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "trafficManagerHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub traffic_manager_host_names: Vec<String>,
         #[doc = "<code>true</code> to stop SCM (KUDU) site when the app is stopped; otherwise, <code>false</code>. The default is <code>false</code>."]
         #[serde(rename = "scmSiteAlsoStopped", default, skip_serializing_if = "Option::is_none")]
@@ -9027,7 +9547,12 @@ pub mod site_auth_settings {
         #[serde(rename = "tokenStoreEnabled", default, skip_serializing_if = "Option::is_none")]
         pub token_store_enabled: Option<bool>,
         #[doc = "External URLs that can be redirected to as part of logging in or logging out of the app. Note that the query string part of the URL is ignored.\nThis is an advanced setting typically only needed by Windows Store application backends.\nNote that URLs within the current domain are always implicitly allowed."]
-        #[serde(rename = "allowedExternalRedirectUrls", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "allowedExternalRedirectUrls",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub allowed_external_redirect_urls: Vec<String>,
         #[doc = "The default authentication provider to use when multiple providers are configured.\nThis setting is only needed if multiple providers are configured and the unauthenticated client\naction is set to \"RedirectToLoginPage\"."]
         #[serde(rename = "defaultProvider", default, skip_serializing_if = "Option::is_none")]
@@ -9054,10 +9579,20 @@ pub mod site_auth_settings {
         #[serde(rename = "validateIssuer", default, skip_serializing_if = "Option::is_none")]
         pub validate_issuer: Option<bool>,
         #[doc = "Allowed audience values to consider when validating JWTs issued by \nAzure Active Directory. Note that the <code>ClientID</code> value is always considered an\nallowed audience, regardless of this setting."]
-        #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "allowedAudiences",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub allowed_audiences: Vec<String>,
         #[doc = "Login parameters to send to the OpenID Connect authorization endpoint when\na user logs in. Each parameter must be in the form \"key=value\"."]
-        #[serde(rename = "additionalLoginParams", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalLoginParams",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_login_params: Vec<String>,
         #[doc = "Gets a JSON string containing the Azure AD Acl settings."]
         #[serde(rename = "aadClaimsAuthorization", default, skip_serializing_if = "Option::is_none")]
@@ -9072,7 +9607,12 @@ pub mod site_auth_settings {
         #[serde(rename = "googleClientSecretSettingName", default, skip_serializing_if = "Option::is_none")]
         pub google_client_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of Google Sign-In authentication.\nThis setting is optional. If not specified, \"openid\", \"profile\", and \"email\" are used as default scopes.\nGoogle Sign-In documentation: https://developers.google.com/identity/sign-in/web/"]
-        #[serde(rename = "googleOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "googleOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub google_o_auth_scopes: Vec<String>,
         #[doc = "The App ID of the Facebook app used for login.\nThis setting is required for enabling Facebook Login.\nFacebook Login documentation: https://developers.facebook.com/docs/facebook-login"]
         #[serde(rename = "facebookAppId", default, skip_serializing_if = "Option::is_none")]
@@ -9084,7 +9624,12 @@ pub mod site_auth_settings {
         #[serde(rename = "facebookAppSecretSettingName", default, skip_serializing_if = "Option::is_none")]
         pub facebook_app_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of Facebook Login authentication.\nThis setting is optional.\nFacebook Login documentation: https://developers.facebook.com/docs/facebook-login"]
-        #[serde(rename = "facebookOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "facebookOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub facebook_o_auth_scopes: Vec<String>,
         #[doc = "The Client Id of the GitHub app used for login.\nThis setting is required for enabling Github login"]
         #[serde(rename = "gitHubClientId", default, skip_serializing_if = "Option::is_none")]
@@ -9096,7 +9641,12 @@ pub mod site_auth_settings {
         #[serde(rename = "gitHubClientSecretSettingName", default, skip_serializing_if = "Option::is_none")]
         pub git_hub_client_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of GitHub Login authentication.\nThis setting is optional"]
-        #[serde(rename = "gitHubOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "gitHubOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub git_hub_o_auth_scopes: Vec<String>,
         #[doc = "The OAuth 1.0a consumer key of the Twitter application used for sign-in.\nThis setting is required for enabling Twitter Sign-In.\nTwitter Sign-In documentation: https://dev.twitter.com/web/sign-in"]
         #[serde(rename = "twitterConsumerKey", default, skip_serializing_if = "Option::is_none")]
@@ -9121,7 +9671,12 @@ pub mod site_auth_settings {
         )]
         pub microsoft_account_client_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of Microsoft Account authentication.\nThis setting is optional. If not specified, \"wl.basic\" is used as the default scope.\nMicrosoft Account Scopes and permissions documentation: https://msdn.microsoft.com/en-us/library/dn631845.aspx"]
-        #[serde(rename = "microsoftAccountOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "microsoftAccountOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub microsoft_account_o_auth_scopes: Vec<String>,
         #[doc = "\"true\" if the auth config settings should be read from a file,\n\"false\" otherwise"]
         #[serde(rename = "isAuthFromFile", default, skip_serializing_if = "Option::is_none")]
@@ -9206,13 +9761,28 @@ pub struct SiteCloneability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub result: Option<site_cloneability::Result>,
     #[doc = "List of features enabled on app that prevent cloning."]
-    #[serde(rename = "blockingFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockingFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocking_features: Vec<SiteCloneabilityCriterion>,
     #[doc = "List of features enabled on app that are non-blocking but cannot be cloned. The app can still be cloned\nbut the features in this list will not be set up on cloned app."]
-    #[serde(rename = "unsupportedFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "unsupportedFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unsupported_features: Vec<SiteCloneabilityCriterion>,
     #[doc = "List of blocking application characteristics."]
-    #[serde(rename = "blockingCharacteristics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockingCharacteristics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocking_characteristics: Vec<SiteCloneabilityCriterion>,
 }
 impl SiteCloneability {
@@ -9252,7 +9822,12 @@ pub struct SiteConfig {
     #[serde(rename = "numberOfWorkers", default, skip_serializing_if = "Option::is_none")]
     pub number_of_workers: Option<i32>,
     #[doc = "Default documents."]
-    #[serde(rename = "defaultDocuments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultDocuments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_documents: Vec<String>,
     #[doc = ".NET Framework version."]
     #[serde(rename = "netFrameworkVersion", default, skip_serializing_if = "Option::is_none")]
@@ -9306,16 +9881,31 @@ pub struct SiteConfig {
     #[serde(rename = "publishingUsername", default, skip_serializing_if = "Option::is_none")]
     pub publishing_username: Option<String>,
     #[doc = "Application settings."]
-    #[serde(rename = "appSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_settings: Vec<NameValuePair>,
     #[doc = "Connection strings."]
-    #[serde(rename = "connectionStrings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionStrings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_strings: Vec<ConnStringInfo>,
     #[doc = "MachineKey of an app."]
     #[serde(rename = "machineKey", default, skip_serializing_if = "Option::is_none")]
     pub machine_key: Option<SiteMachineKey>,
     #[doc = "Handler mappings."]
-    #[serde(rename = "handlerMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "handlerMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub handler_mappings: Vec<HandlerMapping>,
     #[doc = "Document root."]
     #[serde(rename = "documentRoot", default, skip_serializing_if = "Option::is_none")]
@@ -9348,7 +9938,12 @@ pub struct SiteConfig {
     #[serde(rename = "managedPipelineMode", default, skip_serializing_if = "Option::is_none")]
     pub managed_pipeline_mode: Option<site_config::ManagedPipelineMode>,
     #[doc = "Virtual applications."]
-    #[serde(rename = "virtualApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_applications: Vec<VirtualApplication>,
     #[doc = "Site load balancing."]
     #[serde(rename = "loadBalancing", default, skip_serializing_if = "Option::is_none")]
@@ -9405,10 +10000,20 @@ pub struct SiteConfig {
     #[serde(rename = "keyVaultReferenceIdentity", default, skip_serializing_if = "Option::is_none")]
     pub key_vault_reference_identity: Option<String>,
     #[doc = "IP security restrictions for main."]
-    #[serde(rename = "ipSecurityRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipSecurityRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_security_restrictions: Vec<IpSecurityRestriction>,
     #[doc = "IP security restrictions for scm."]
-    #[serde(rename = "scmIpSecurityRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scmIpSecurityRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scm_ip_security_restrictions: Vec<IpSecurityRestriction>,
     #[doc = "IP security restrictions for scm to use main."]
     #[serde(rename = "scmIpSecurityRestrictionsUseMain", default, skip_serializing_if = "Option::is_none")]
@@ -9823,7 +10428,11 @@ pub mod site_extension_info {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub feed_url: Option<String>,
         #[doc = "List of authors."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub authors: Vec<String>,
         #[doc = "Installer command line parameters."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -9988,7 +10597,12 @@ pub mod site_patch_resource {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub state: Option<String>,
         #[doc = "Hostnames associated with the app."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Name of the repository site."]
         #[serde(rename = "repositorySiteName", default, skip_serializing_if = "Option::is_none")]
@@ -10000,13 +10614,23 @@ pub mod site_patch_resource {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<bool>,
         #[doc = "Enabled hostnames for the app.Hostnames need to be assigned (see HostNames) AND enabled. Otherwise,\nthe app is not served on those hostnames."]
-        #[serde(rename = "enabledHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "enabledHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub enabled_host_names: Vec<String>,
         #[doc = "Management information availability state for the app."]
         #[serde(rename = "availabilityState", default, skip_serializing_if = "Option::is_none")]
         pub availability_state: Option<properties::AvailabilityState>,
         #[doc = "Hostname SSL states are used to manage the SSL bindings for app's hostnames."]
-        #[serde(rename = "hostNameSslStates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNameSslStates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_name_ssl_states: Vec<HostNameSslState>,
         #[doc = "Resource ID of the associated App Service plan, formatted as: \"/subscriptions/{subscriptionID}/resourceGroups/{groupName}/providers/Microsoft.Web/serverfarms/{appServicePlanName}\"."]
         #[serde(rename = "serverFarmId", default, skip_serializing_if = "Option::is_none")]
@@ -10027,7 +10651,12 @@ pub mod site_patch_resource {
         #[serde(rename = "siteConfig", default, skip_serializing_if = "Option::is_none")]
         pub site_config: Option<SiteConfig>,
         #[doc = "Azure Traffic Manager hostnames associated with the app. Read-only."]
-        #[serde(rename = "trafficManagerHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "trafficManagerHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub traffic_manager_host_names: Vec<String>,
         #[doc = "<code>true</code> to stop SCM (KUDU) site when the app is stopped; otherwise, <code>false</code>. The default is <code>false</code>."]
         #[serde(rename = "scmSiteAlsoStopped", default, skip_serializing_if = "Option::is_none")]
@@ -10303,10 +10932,18 @@ pub struct SkuDescription {
     #[serde(rename = "skuCapacity", default, skip_serializing_if = "Option::is_none")]
     pub sku_capacity: Option<SkuCapacity>,
     #[doc = "Locations of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Capabilities of the SKU, e.g., is traffic manager enabled?"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
 }
 impl SkuDescription {
@@ -10359,7 +10996,11 @@ pub struct SkuInfos {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "List of SKUs the subscription is able to use."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skus: Vec<GlobalCsmSkuDescription>,
 }
 impl SkuInfos {
@@ -10371,13 +11012,28 @@ impl SkuInfos {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SlotConfigNames {
     #[doc = "List of connection string names."]
-    #[serde(rename = "connectionStringNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionStringNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_string_names: Vec<String>,
     #[doc = "List of application settings names."]
-    #[serde(rename = "appSettingNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appSettingNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_setting_names: Vec<String>,
     #[doc = "List of external Azure storage account identifiers."]
-    #[serde(rename = "azureStorageConfigNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureStorageConfigNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_storage_config_names: Vec<String>,
 }
 impl SlotConfigNames {
@@ -10638,10 +11294,18 @@ pub struct Solution {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<solution::Type>,
     #[doc = "Solution Data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<Vec<NameValuePair>>,
     #[doc = "Solution Metadata."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<Vec<NameValuePair>>,
 }
 impl Solution {
@@ -10730,7 +11394,12 @@ pub struct StackMajorVersion {
     #[serde(rename = "isDefault", default, skip_serializing_if = "Option::is_none")]
     pub is_default: Option<bool>,
     #[doc = "Minor versions associated with the major version."]
-    #[serde(rename = "minorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "minorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minor_versions: Vec<StackMinorVersion>,
     #[doc = "<code>true</code> if this supports Application Insights; otherwise, <code>false</code>."]
     #[serde(rename = "applicationInsights", default, skip_serializing_if = "Option::is_none")]
@@ -10878,7 +11547,12 @@ pub struct StaticSite {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub branch: Option<String>,
     #[doc = "The custom domains associated with this static site."]
-    #[serde(rename = "customDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_domains: Vec<String>,
     #[doc = "A user's github repository token. This is used to setup the Github Actions workflow file and API secrets."]
     #[serde(rename = "repositoryToken", default, skip_serializing_if = "Option::is_none")]
@@ -10887,7 +11561,12 @@ pub struct StaticSite {
     #[serde(rename = "buildProperties", default, skip_serializing_if = "Option::is_none")]
     pub build_properties: Option<StaticSiteBuildProperties>,
     #[doc = "Private endpoint connections"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ResponseMessageEnvelopeRemotePrivateEndpointConnection>,
     #[doc = "State indicating whether staging environments are allowed or not allowed for a static web app."]
     #[serde(rename = "stagingEnvironmentPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -10905,7 +11584,12 @@ pub struct StaticSite {
     #[serde(rename = "keyVaultReferenceIdentity", default, skip_serializing_if = "Option::is_none")]
     pub key_vault_reference_identity: Option<String>,
     #[doc = "User provided function apps registered with the static site"]
-    #[serde(rename = "userProvidedFunctionApps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userProvidedFunctionApps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_provided_function_apps: Vec<StaticSiteUserProvidedFunctionApp>,
     #[doc = "The provider that submitted the last deployment to the primary environment of the static site."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10991,7 +11675,12 @@ pub mod static_site_build_arm_resource {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub status: Option<properties::Status>,
         #[doc = "User provided function apps registered with the static site build"]
-        #[serde(rename = "userProvidedFunctionApps", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "userProvidedFunctionApps",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub user_provided_function_apps: Vec<StaticSiteUserProvidedFunctionApp>,
     }
     impl Properties {
@@ -11914,7 +12603,11 @@ pub struct StringList {
     #[serde(flatten)]
     pub proxy_only_resource: ProxyOnlyResource,
     #[doc = "List of string resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub properties: Vec<String>,
 }
 impl StringList {
@@ -12118,7 +12811,11 @@ pub mod triggered_job_history {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "List of triggered web job runs."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub runs: Vec<TriggeredJobRun>,
     }
     impl Properties {
@@ -12620,7 +13317,12 @@ pub struct VirtualApplication {
     #[serde(rename = "preloadEnabled", default, skip_serializing_if = "Option::is_none")]
     pub preload_enabled: Option<bool>,
     #[doc = "Virtual directories for virtual application."]
-    #[serde(rename = "virtualDirectories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualDirectories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_directories: Vec<VirtualDirectory>,
 }
 impl VirtualApplication {
@@ -12756,7 +13458,11 @@ pub mod vnet_info {
         #[serde(rename = "certBlob", default, skip_serializing_if = "Option::is_none")]
         pub cert_blob: Option<String>,
         #[doc = "The routes that this Virtual Network connection uses."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub routes: Vec<VnetRoute>,
         #[doc = "<code>true</code> if a resync is required; otherwise, <code>false</code>."]
         #[serde(rename = "resyncRequired", default, skip_serializing_if = "Option::is_none")]
@@ -12918,10 +13624,19 @@ pub mod vnet_validation_failure_details {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub failed: Option<bool>,
         #[doc = "A list of tests that failed in the validation."]
-        #[serde(rename = "failedTests", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "failedTests",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub failed_tests: Vec<VnetValidationTestFailure>,
         #[doc = "A list of warnings generated during validation."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub warnings: Vec<VnetValidationTestFailure>,
     }
     impl Properties {
@@ -13012,7 +13727,12 @@ pub struct WebAppMajorVersion {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     #[doc = "Minor versions associated with the major version."]
-    #[serde(rename = "minorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "minorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minor_versions: Vec<WebAppMinorVersion>,
 }
 impl WebAppMajorVersion {
@@ -13127,7 +13847,12 @@ pub mod web_app_stack {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub value: Option<String>,
         #[doc = "List of major versions available."]
-        #[serde(rename = "majorVersions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "majorVersions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub major_versions: Vec<WebAppMajorVersion>,
         #[doc = "Web App stack preferred OS."]
         #[serde(rename = "preferredOs", default, skip_serializing_if = "Option::is_none")]
@@ -13346,7 +14071,12 @@ pub struct WorkerPool {
     #[serde(rename = "workerCount", default, skip_serializing_if = "Option::is_none")]
     pub worker_count: Option<i32>,
     #[doc = "Names of all instances in the worker pool (read only)."]
-    #[serde(rename = "instanceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "instanceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instance_names: Vec<String>,
 }
 impl WorkerPool {
diff --git a/services/mgmt/web/src/package_2021_02/models.rs b/services/mgmt/web/src/package_2021_02/models.rs
index 7c82ef61b4..c4bcffa8ef 100644
--- a/services/mgmt/web/src/package_2021_02/models.rs
+++ b/services/mgmt/web/src/package_2021_02/models.rs
@@ -13,10 +13,18 @@ pub struct AbnormalTimePeriod {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "List of Possible Cause of downtime"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<DetectorAbnormalTimePeriod>,
     #[doc = "List of proposed solutions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub solutions: Vec<Solution>,
 }
 impl AbnormalTimePeriod {
@@ -80,10 +88,20 @@ pub mod address_response {
         #[serde(rename = "internalIpAddress", default, skip_serializing_if = "Option::is_none")]
         pub internal_ip_address: Option<String>,
         #[doc = "IP addresses appearing on outbound connections."]
-        #[serde(rename = "outboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "outboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub outbound_ip_addresses: Vec<String>,
         #[doc = "Additional virtual IPs."]
-        #[serde(rename = "vipMappings", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "vipMappings",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub vip_mappings: Vec<VirtualIpMapping>,
     }
     impl Properties {
@@ -96,7 +114,12 @@ pub mod address_response {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedAudiencesValidation {
     #[doc = "The configuration settings of the allowed list of audiences from which to validate the JWT token."]
-    #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAudiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_audiences: Vec<String>,
 }
 impl AllowedAudiencesValidation {
@@ -108,10 +131,18 @@ impl AllowedAudiencesValidation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedPrincipals {
     #[doc = "The list of the allowed groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<String>,
     #[doc = "The list of the allowed identities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identities: Vec<String>,
 }
 impl AllowedPrincipals {
@@ -129,10 +160,18 @@ pub struct AnalysisData {
     #[serde(rename = "detectorDefinition", default, skip_serializing_if = "Option::is_none")]
     pub detector_definition: Option<DetectorDefinition>,
     #[doc = "Source Metrics"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<DiagnosticMetricSet>,
     #[doc = "Additional Source Data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<Vec<NameValuePair>>,
     #[serde(rename = "detectorMetaData", default, skip_serializing_if = "Option::is_none")]
     pub detector_meta_data: Option<ResponseMetaData>,
@@ -456,6 +495,7 @@ pub mod app_service_certificate_order {
         #[serde(
             rename = "appServiceCertificateNotRenewableReasons",
             default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
             skip_serializing_if = "Vec::is_empty"
         )]
         pub app_service_certificate_not_renewable_reasons: Vec<String>,
@@ -618,6 +658,7 @@ pub mod app_service_certificate_order_patch_resource {
         #[serde(
             rename = "appServiceCertificateNotRenewableReasons",
             default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
             skip_serializing_if = "Vec::is_empty"
         )]
         pub app_service_certificate_not_renewable_reasons: Vec<String>,
@@ -754,10 +795,20 @@ pub struct AppServiceEnvironment {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub suspended: Option<bool>,
     #[doc = "Custom settings for changing the behavior of the App Service Environment."]
-    #[serde(rename = "clusterSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_settings: Vec<NameValuePair>,
     #[doc = "User added ip ranges to whitelist on ASE db"]
-    #[serde(rename = "userWhitelistedIpRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userWhitelistedIpRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_whitelisted_ip_ranges: Vec<String>,
     #[doc = "Flag that displays whether an ASE has linux workers or not"]
     #[serde(rename = "hasLinuxWorkers", default, skip_serializing_if = "Option::is_none")]
@@ -1221,13 +1272,27 @@ pub struct ApplicationStack {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub dependency: Option<String>,
     #[doc = "List of major versions available."]
-    #[serde(rename = "majorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "majorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub major_versions: Vec<StackMajorVersion>,
     #[doc = "List of frameworks associated with application stack."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frameworks: Vec<ApplicationStack>,
     #[doc = "<code>true</code> if this is the stack is deprecated; otherwise, <code>false</code>."]
-    #[serde(rename = "isDeprecated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "isDeprecated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub is_deprecated: Vec<ApplicationStack>,
 }
 impl ApplicationStack {
@@ -1390,13 +1455,33 @@ pub mod ase_v3_networking_configuration {
     #[doc = "AseV3NetworkingConfiguration resource specific properties"]
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
-        #[serde(rename = "windowsOutboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "windowsOutboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub windows_outbound_ip_addresses: Vec<String>,
-        #[serde(rename = "linuxOutboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "linuxOutboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub linux_outbound_ip_addresses: Vec<String>,
-        #[serde(rename = "externalInboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "externalInboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub external_inbound_ip_addresses: Vec<String>,
-        #[serde(rename = "internalInboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "internalInboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub internal_inbound_ip_addresses: Vec<String>,
         #[doc = "Property to enable and disable new private endpoint connection creation on ASE"]
         #[serde(rename = "allowNewPrivateEndpointConnections", default, skip_serializing_if = "Option::is_none")]
@@ -1494,16 +1579,31 @@ pub struct AutoHealTriggers {
     #[serde(rename = "privateBytesInKB", default, skip_serializing_if = "Option::is_none")]
     pub private_bytes_in_kb: Option<i32>,
     #[doc = "A rule based on status codes."]
-    #[serde(rename = "statusCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_codes: Vec<StatusCodesBasedTrigger>,
     #[doc = "Trigger based on request execution time."]
     #[serde(rename = "slowRequests", default, skip_serializing_if = "Option::is_none")]
     pub slow_requests: Option<SlowRequestsBasedTrigger>,
     #[doc = "A rule based on multiple Slow Requests Rule with path"]
-    #[serde(rename = "slowRequestsWithPath", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "slowRequestsWithPath",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub slow_requests_with_path: Vec<SlowRequestsBasedTrigger>,
     #[doc = "A rule based on status codes ranges."]
-    #[serde(rename = "statusCodesRange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusCodesRange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_codes_range: Vec<StatusCodesRangeBasedTrigger>,
 }
 impl AutoHealTriggers {
@@ -1539,7 +1639,12 @@ impl AzureActiveDirectory {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureActiveDirectoryLogin {
     #[doc = "Login parameters to send to the OpenID Connect authorization endpoint when\na user logs in. Each parameter must be in the form \"key=value\"."]
-    #[serde(rename = "loginParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_parameters: Vec<String>,
     #[doc = "<code>true</code> if the www-authenticate provider should be omitted from the request; otherwise, <code>false</code>."]
     #[serde(rename = "disableWWWAuthenticate", default, skip_serializing_if = "Option::is_none")]
@@ -1588,7 +1693,12 @@ pub struct AzureActiveDirectoryValidation {
     #[serde(rename = "jwtClaimChecks", default, skip_serializing_if = "Option::is_none")]
     pub jwt_claim_checks: Option<JwtClaimChecks>,
     #[doc = "The list of audiences that can make successful authentication/authorization requests."]
-    #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAudiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_audiences: Vec<String>,
     #[doc = "The configuration settings of the Azure Active Directory default authorization policy."]
     #[serde(rename = "defaultAuthorizationPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -1803,7 +1913,11 @@ pub mod backup_item {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub log: Option<String>,
         #[doc = "List of databases included in the backup."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub databases: Vec<DatabaseBackupSetting>,
         #[doc = "True if this backup has been created due to a schedule being triggered."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1896,7 +2010,11 @@ pub mod backup_request {
         #[serde(rename = "backupSchedule", default, skip_serializing_if = "Option::is_none")]
         pub backup_schedule: Option<BackupSchedule>,
         #[doc = "Databases included in the backup."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub databases: Vec<DatabaseBackupSetting>,
     }
     impl Properties {
@@ -2093,7 +2211,12 @@ pub mod certificate {
         #[serde(rename = "subjectName", default, skip_serializing_if = "Option::is_none")]
         pub subject_name: Option<String>,
         #[doc = "Host names the certificate applies to."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Pfx blob."]
         #[serde(rename = "pfxBlob", default, skip_serializing_if = "Option::is_none")]
@@ -2357,7 +2480,12 @@ pub mod certificate_patch_resource {
         #[serde(rename = "subjectName", default, skip_serializing_if = "Option::is_none")]
         pub subject_name: Option<String>,
         #[doc = "Host names the certificate applies to."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Pfx blob."]
         #[serde(rename = "pfxBlob", default, skip_serializing_if = "Option::is_none")]
@@ -2656,7 +2784,12 @@ impl ContainerCpuStatistics {
 pub struct ContainerCpuUsage {
     #[serde(rename = "totalUsage", default, skip_serializing_if = "Option::is_none")]
     pub total_usage: Option<i64>,
-    #[serde(rename = "perCpuUsage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "perCpuUsage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub per_cpu_usage: Vec<i64>,
     #[serde(rename = "kernelModeUsage", default, skip_serializing_if = "Option::is_none")]
     pub kernel_mode_usage: Option<i64>,
@@ -2866,7 +2999,12 @@ pub mod cookie_expiration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CorsSettings {
     #[doc = "Gets or sets the list of origins that should be allowed to make cross-origin\ncalls (for example: http://example.com:12345). Use \"*\" to allow all."]
-    #[serde(rename = "allowedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_origins: Vec<String>,
     #[doc = "Gets or sets whether CORS requests with credentials are allowed. See \nhttps://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#Requests_with_credentials\nfor more details."]
     #[serde(rename = "supportCredentials", default, skip_serializing_if = "Option::is_none")]
@@ -2882,7 +3020,11 @@ impl CorsSettings {
 pub struct CsmMoveResourceEnvelope {
     #[serde(rename = "targetResourceGroup", default, skip_serializing_if = "Option::is_none")]
     pub target_resource_group: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
 }
 impl CsmMoveResourceEnvelope {
@@ -3145,19 +3287,44 @@ pub mod custom_hostname_analysis_result {
         #[serde(rename = "conflictingAppResourceId", default, skip_serializing_if = "Option::is_none")]
         pub conflicting_app_resource_id: Option<String>,
         #[doc = "CName records controller can see for this hostname."]
-        #[serde(rename = "cNameRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "cNameRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub c_name_records: Vec<String>,
         #[doc = "TXT records controller can see for this hostname."]
-        #[serde(rename = "txtRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "txtRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub txt_records: Vec<String>,
         #[doc = "A records controller can see for this hostname."]
-        #[serde(rename = "aRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "aRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub a_records: Vec<String>,
         #[doc = "Alternate CName records controller can see for this hostname."]
-        #[serde(rename = "alternateCNameRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "alternateCNameRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub alternate_c_name_records: Vec<String>,
         #[doc = "Alternate TXT records controller can see for this hostname."]
-        #[serde(rename = "alternateTxtRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "alternateTxtRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub alternate_txt_records: Vec<String>,
     }
     impl Properties {
@@ -3200,7 +3367,12 @@ pub struct DataProviderMetadata {
     #[serde(rename = "providerName", default, skip_serializing_if = "Option::is_none")]
     pub provider_name: Option<String>,
     #[doc = "Settings for the data provider"]
-    #[serde(rename = "propertyBag", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyBag",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_bag: Vec<KeyValuePairStringObject>,
 }
 impl DataProviderMetadata {
@@ -3212,10 +3384,19 @@ impl DataProviderMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataSource {
     #[doc = "Instructions if any for the data source"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instructions: Vec<String>,
     #[doc = "Datasource Uri Links"]
-    #[serde(rename = "dataSourceUri", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSourceUri",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_source_uri: Vec<NameValuePair>,
 }
 impl DataSource {
@@ -3248,10 +3429,18 @@ pub struct DataTableResponseObject {
     #[serde(rename = "tableName", default, skip_serializing_if = "Option::is_none")]
     pub table_name: Option<String>,
     #[doc = "List of columns with data types"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<DataTableResponseColumn>,
     #[doc = "Raw row values"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rows: Vec<Vec<String>>,
 }
 impl DataTableResponseObject {
@@ -3335,7 +3524,12 @@ pub struct DefaultAuthorizationPolicy {
     #[serde(rename = "allowedPrincipals", default, skip_serializing_if = "Option::is_none")]
     pub allowed_principals: Option<AllowedPrincipals>,
     #[doc = "The configuration settings of the Azure Active Directory allowed applications."]
-    #[serde(rename = "allowedApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_applications: Vec<String>,
 }
 impl DefaultAuthorizationPolicy {
@@ -3375,7 +3569,11 @@ pub mod default_error_response {
         #[doc = "Detailed error description and debugging information."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<serde_json::Value>,
         #[doc = "More information to debug error."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3572,13 +3770,27 @@ impl DeploymentCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeploymentLocations {
     #[doc = "Available regions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<GeoRegion>,
     #[doc = "Available App Service Environments with full descriptions of the environments."]
-    #[serde(rename = "hostingEnvironments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostingEnvironments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosting_environments: Vec<AppServiceEnvironment>,
     #[doc = "Available App Service Environments with basic information."]
-    #[serde(rename = "hostingEnvironmentDeploymentInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostingEnvironmentDeploymentInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosting_environment_deployment_infos: Vec<HostingEnvironmentDeploymentInfo>,
 }
 impl DeploymentLocations {
@@ -3605,13 +3817,22 @@ pub struct DetectorAbnormalTimePeriod {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub priority: Option<f64>,
     #[doc = "Downtime metadata"]
-    #[serde(rename = "metaData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metaData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meta_data: Vec<Vec<NameValuePair>>,
     #[doc = "Represents the type of the Detector"]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<detector_abnormal_time_period::Type>,
     #[doc = "List of proposed solutions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub solutions: Vec<Solution>,
 }
 impl DetectorAbnormalTimePeriod {
@@ -3688,10 +3909,20 @@ pub struct DetectorInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "List of Support Topics for which this detector is enabled."]
-    #[serde(rename = "supportTopicList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportTopicList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub support_topic_list: Vec<SupportTopic>,
     #[doc = "Analysis Types for which this detector should apply to."]
-    #[serde(rename = "analysisType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "analysisType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub analysis_type: Vec<String>,
     #[doc = "Whether this detector is an Analysis Detector or not."]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
@@ -3738,13 +3969,22 @@ pub mod detector_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub metadata: Option<DetectorInfo>,
         #[doc = "Data Set"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub dataset: Vec<DiagnosticData>,
         #[doc = "Identify the status of the most severe insight generated by the detector."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub status: Option<Status>,
         #[doc = "Additional configuration for different data providers to be used by the UI"]
-        #[serde(rename = "dataProvidersMetadata", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "dataProvidersMetadata",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub data_providers_metadata: Vec<DataProviderMetadata>,
         #[doc = "Suggested utterances where the detector can be applicable"]
         #[serde(rename = "suggestedUtterances", default, skip_serializing_if = "Option::is_none")]
@@ -3802,13 +4042,27 @@ pub mod diagnostic_analysis {
         #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
         pub end_time: Option<time::OffsetDateTime>,
         #[doc = "List of time periods."]
-        #[serde(rename = "abnormalTimePeriods", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "abnormalTimePeriods",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub abnormal_time_periods: Vec<AbnormalTimePeriod>,
         #[doc = "Data by each detector"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub payload: Vec<AnalysisData>,
         #[doc = "Data by each detector for detectors that did not corelate"]
-        #[serde(rename = "nonCorrelatedDetectors", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "nonCorrelatedDetectors",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub non_correlated_detectors: Vec<DetectorDefinition>,
     }
     impl Properties {
@@ -3953,13 +4207,26 @@ pub mod diagnostic_detector_response {
         #[serde(rename = "detectorDefinition", default, skip_serializing_if = "Option::is_none")]
         pub detector_definition: Option<DetectorDefinition>,
         #[doc = "Metrics provided by the detector"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub metrics: Vec<DiagnosticMetricSet>,
         #[doc = "List of Correlated events found by the detector"]
-        #[serde(rename = "abnormalTimePeriods", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "abnormalTimePeriods",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub abnormal_time_periods: Vec<DetectorAbnormalTimePeriod>,
         #[doc = "Additional Data that detector wants to send."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub data: Vec<Vec<NameValuePair>>,
         #[serde(rename = "responseMetaData", default, skip_serializing_if = "Option::is_none")]
         pub response_meta_data: Option<ResponseMetaData>,
@@ -4016,7 +4283,11 @@ pub struct DiagnosticMetricSet {
     #[serde(rename = "timeGrain", default, skip_serializing_if = "Option::is_none")]
     pub time_grain: Option<String>,
     #[doc = "Collection of metric values for the selected period based on the {Microsoft.Web.Hosting.Administration.DiagnosticMetricSet.TimeGrain}"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<DiagnosticMetricSample>,
 }
 impl DiagnosticMetricSet {
@@ -4082,7 +4353,12 @@ pub mod domain {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<properties::ProvisioningState>,
         #[doc = "Name servers."]
-        #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "nameServers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub name_servers: Vec<String>,
         #[doc = "<code>true</code> if domain privacy is enabled for this domain; otherwise, <code>false</code>."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4103,12 +4379,22 @@ pub mod domain {
         #[serde(rename = "readyForDnsRecordManagement", default, skip_serializing_if = "Option::is_none")]
         pub ready_for_dns_record_management: Option<bool>,
         #[doc = "All hostnames derived from the domain and assigned to Azure resources."]
-        #[serde(rename = "managedHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "managedHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub managed_host_names: Vec<HostName>,
         #[doc = "Domain purchase consent object, representing acceptance of applicable legal agreements."]
         pub consent: DomainPurchaseConsent,
         #[doc = "Reasons why domain is not renewable."]
-        #[serde(rename = "domainNotRenewableReasons", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "domainNotRenewableReasons",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub domain_not_renewable_reasons: Vec<String>,
         #[doc = "Current DNS type"]
         #[serde(rename = "dnsType", default, skip_serializing_if = "Option::is_none")]
@@ -4356,7 +4642,12 @@ pub mod domain_patch_resource {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<properties::ProvisioningState>,
         #[doc = "Name servers."]
-        #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "nameServers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub name_servers: Vec<String>,
         #[doc = "<code>true</code> if domain privacy is enabled for this domain; otherwise, <code>false</code>."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4377,12 +4668,22 @@ pub mod domain_patch_resource {
         #[serde(rename = "readyForDnsRecordManagement", default, skip_serializing_if = "Option::is_none")]
         pub ready_for_dns_record_management: Option<bool>,
         #[doc = "All hostnames derived from the domain and assigned to Azure resources."]
-        #[serde(rename = "managedHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "managedHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub managed_host_names: Vec<HostName>,
         #[doc = "Domain purchase consent object, representing acceptance of applicable legal agreements."]
         pub consent: DomainPurchaseConsent,
         #[doc = "Reasons why domain is not renewable."]
-        #[serde(rename = "domainNotRenewableReasons", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "domainNotRenewableReasons",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub domain_not_renewable_reasons: Vec<String>,
         #[doc = "Current DNS type"]
         #[serde(rename = "dnsType", default, skip_serializing_if = "Option::is_none")]
@@ -4482,7 +4783,12 @@ pub mod domain_patch_resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainPurchaseConsent {
     #[doc = "List of applicable legal agreement keys. This list can be retrieved using ListLegalAgreements API under <code>TopLevelDomain</code> resource."]
-    #[serde(rename = "agreementKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agreementKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agreement_keys: Vec<String>,
     #[doc = "Client IP address."]
     #[serde(rename = "agreedBy", default, skip_serializing_if = "Option::is_none")]
@@ -4530,7 +4836,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The IP Addresses and Ports used when connecting to DomainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -4569,13 +4880,26 @@ pub struct ErrorEntity {
     #[serde(rename = "messageTemplate", default, skip_serializing_if = "Option::is_none")]
     pub message_template: Option<String>,
     #[doc = "Parameters for the template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<String>,
     #[doc = "Inner errors."]
-    #[serde(rename = "innerErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "innerErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inner_errors: Vec<ErrorEntity>,
     #[doc = "Error Details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorEntity>,
     #[doc = "The error target."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4596,7 +4920,12 @@ impl ErrorEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Experiments {
     #[doc = "List of ramp-up rules."]
-    #[serde(rename = "rampUpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rampUpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ramp_up_rules: Vec<RampUpRule>,
 }
 impl Experiments {
@@ -4755,7 +5084,12 @@ pub struct FunctionAppMajorVersion {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     #[doc = "Minor versions associated with the major version."]
-    #[serde(rename = "minorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "minorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minor_versions: Vec<FunctionAppMinorVersion>,
 }
 impl FunctionAppMajorVersion {
@@ -4803,7 +5137,12 @@ pub struct FunctionAppRuntimeSettings {
     #[serde(rename = "siteConfigPropertiesDictionary", default, skip_serializing_if = "Option::is_none")]
     pub site_config_properties_dictionary: Option<SiteConfigPropertiesDictionary>,
     #[doc = "List of supported Functions extension versions."]
-    #[serde(rename = "supportedFunctionsExtensionVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFunctionsExtensionVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_functions_extension_versions: Vec<String>,
     #[doc = "<code>true</code> if the stack is in preview; otherwise, <code>false</code>."]
     #[serde(rename = "isPreview", default, skip_serializing_if = "Option::is_none")]
@@ -4876,7 +5215,12 @@ pub mod function_app_stack {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub value: Option<String>,
         #[doc = "List of major versions available."]
-        #[serde(rename = "majorVersions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "majorVersions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub major_versions: Vec<FunctionAppMajorVersion>,
         #[doc = "Function App stack preferred OS."]
         #[serde(rename = "preferredOs", default, skip_serializing_if = "Option::is_none")]
@@ -5181,10 +5525,18 @@ pub struct GlobalCsmSkuDescription {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<SkuCapacity>,
     #[doc = "Locations of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Capabilities of the SKU, e.g., is traffic manager enabled?"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
 }
 impl GlobalCsmSkuDescription {
@@ -5205,7 +5557,12 @@ pub struct GlobalValidation {
     #[serde(rename = "redirectToProvider", default, skip_serializing_if = "Option::is_none")]
     pub redirect_to_provider: Option<String>,
     #[doc = "The paths for which unauthenticated flow would not be redirected to the login page."]
-    #[serde(rename = "excludedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_paths: Vec<String>,
 }
 impl GlobalValidation {
@@ -5288,7 +5645,12 @@ pub struct HostName {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of apps the hostname is assigned to. This list will have more than one app only if the hostname is pointing to a Traffic Manager."]
-    #[serde(rename = "siteNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "siteNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub site_names: Vec<String>,
     #[doc = "Name of the Azure resource the hostname is assigned to. If it is assigned to a Traffic Manager then it will be the Traffic Manager name otherwise it will be the app name."]
     #[serde(rename = "azureResourceName", default, skip_serializing_if = "Option::is_none")]
@@ -5792,10 +6154,18 @@ pub struct InboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The IP addresses that network traffic will originate from in cidr notation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<String>,
     #[doc = "The ports that network traffic will arrive to the App Service Environment at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<String>,
 }
 impl InboundEnvironmentEndpoint {
@@ -5911,10 +6281,20 @@ pub mod ip_security_restriction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JwtClaimChecks {
     #[doc = "The list of the allowed groups."]
-    #[serde(rename = "allowedGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_groups: Vec<String>,
     #[doc = "The list of the allowed client applications."]
-    #[serde(rename = "allowedClientApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedClientApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_client_applications: Vec<String>,
 }
 impl JwtClaimChecks {
@@ -6233,7 +6613,12 @@ pub struct Login {
     #[serde(rename = "preserveUrlFragmentsForLogins", default, skip_serializing_if = "Option::is_none")]
     pub preserve_url_fragments_for_logins: Option<bool>,
     #[doc = "External URLs that can be redirected to as part of logging in or logging out of the app. Note that the query string part of the URL is ignored.\nThis is an advanced setting typically only needed by Windows Store application backends.\nNote that URLs within the current domain are always implicitly allowed."]
-    #[serde(rename = "allowedExternalRedirectUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedExternalRedirectUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_external_redirect_urls: Vec<String>,
     #[doc = "The configuration settings of the session cookie's expiration."]
     #[serde(rename = "cookieExpiration", default, skip_serializing_if = "Option::is_none")]
@@ -6263,7 +6648,11 @@ impl LoginRoutes {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoginScopes {
     #[doc = "A list of the scopes that should be requested while authenticating."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl LoginScopes {
@@ -6335,7 +6724,11 @@ pub mod ms_deploy_log {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "List of log entry messages"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub entries: Vec<MsDeployLogEntry>,
     }
     impl Properties {
@@ -6503,15 +6896,33 @@ pub struct MetricSpecification {
     pub fill_gap_with_zero: Option<bool>,
     #[serde(rename = "isInternal", default, skip_serializing_if = "Option::is_none")]
     pub is_internal: Option<bool>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<MetricAvailability>,
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
 }
 impl MetricSpecification {
@@ -6683,10 +7094,20 @@ pub mod network_features {
         #[serde(rename = "virtualNetworkConnection", default, skip_serializing_if = "Option::is_none")]
         pub virtual_network_connection: Option<VnetInfo>,
         #[doc = "The Hybrid Connections summary view."]
-        #[serde(rename = "hybridConnections", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hybridConnections",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub hybrid_connections: Vec<RelayServiceConnectionEntity>,
         #[doc = "The Hybrid Connection V2 (Service Bus) view."]
-        #[serde(rename = "hybridConnectionsV2", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hybridConnectionsV2",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub hybrid_connections_v2: Vec<HybridConnection>,
     }
     impl Properties {
@@ -6782,7 +7203,11 @@ pub struct OpenIdConnectLogin {
     #[serde(rename = "nameClaimType", default, skip_serializing_if = "Option::is_none")]
     pub name_claim_type: Option<String>,
     #[doc = "A list of the scopes that should be requested while authenticating."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl OpenIdConnectLogin {
@@ -6821,7 +7246,11 @@ pub struct Operation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<operation::Status>,
     #[doc = "Any errors associate with the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ErrorEntity>,
     #[doc = "Time when operation has started."]
     #[serde(rename = "createdTime", default, with = "azure_core::date::rfc3339::option")]
@@ -6860,7 +7289,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that the App Service Environment reaches the service at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -6960,7 +7393,11 @@ pub struct PerfMonSet {
     #[serde(rename = "timeGrain", default, skip_serializing_if = "Option::is_none")]
     pub time_grain: Option<String>,
     #[doc = "Collection of workers that are active during this time."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<PerfMonSample>,
 }
 impl PerfMonSet {
@@ -7165,7 +7602,12 @@ pub mod private_access {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<bool>,
         #[doc = "The Virtual Networks (and subnets) allowed to access the site privately."]
-        #[serde(rename = "virtualNetworks", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "virtualNetworks",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub virtual_networks: Vec<PrivateAccessVirtualNetwork>,
     }
     impl Properties {
@@ -7202,7 +7644,11 @@ pub struct PrivateAccessVirtualNetwork {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "A List of subnets that access is allowed to on this Virtual Network. An empty array (but not null) is interpreted to mean that all subnets are allowed within this Virtual Network."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<PrivateAccessSubnet>,
 }
 impl PrivateAccessVirtualNetwork {
@@ -7301,10 +7747,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "RequiredMembers of a private link resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "RequiredZoneNames of a private link resource"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -7366,16 +7822,32 @@ pub mod process_info {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub parent: Option<String>,
         #[doc = "Child process list."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub children: Vec<String>,
         #[doc = "Thread list."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub threads: Vec<ProcessThreadInfo>,
         #[doc = "List of open files."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub open_file_handles: Vec<String>,
         #[doc = "List of modules."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub modules: Vec<ProcessModuleInfo>,
         #[doc = "File name of this process."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7808,7 +8280,11 @@ pub struct QueryUtterancesResults {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub query: Option<String>,
     #[doc = "Array of utterance results for search query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub results: Vec<QueryUtterancesResult>,
 }
 impl QueryUtterancesResults {
@@ -7896,7 +8372,12 @@ pub mod recommendation {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub channels: Option<properties::Channels>,
         #[doc = "The list of category tags that this recommendation belongs to."]
-        #[serde(rename = "categoryTags", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "categoryTags",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub category_tags: Vec<String>,
         #[doc = "Name of action recommended by this object."]
         #[serde(rename = "actionName", default, skip_serializing_if = "Option::is_none")]
@@ -7905,7 +8386,11 @@ pub mod recommendation {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<i32>,
         #[doc = "The list of states of this recommendation. If it's null then it should be considered \"Active\"."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub states: Vec<String>,
         #[doc = "The beginning time in UTC of a range that the recommendation refers to."]
         #[serde(rename = "startTime", default, with = "azure_core::date::rfc3339::option")]
@@ -8067,7 +8552,12 @@ pub mod recommendation_rule {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub channels: Option<properties::Channels>,
         #[doc = "The list of category tags that this recommendation rule belongs to."]
-        #[serde(rename = "categoryTags", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "categoryTags",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub category_tags: Vec<String>,
         #[doc = "True if this is associated with a dynamically added rule"]
         #[serde(rename = "isDynamic", default, skip_serializing_if = "Option::is_none")]
@@ -8214,7 +8704,12 @@ pub mod remote_private_endpoint_connection {
         #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
         pub private_link_service_connection_state: Option<PrivateLinkConnectionState>,
         #[doc = "Private IPAddresses mapped to the remote private endpoint"]
-        #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_addresses: Vec<String>,
     }
     impl Properties {
@@ -8251,7 +8746,12 @@ pub mod remote_private_endpoint_connection_arm_resource {
         #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
         pub private_link_service_connection_state: Option<PrivateLinkConnectionState>,
         #[doc = "Private IPAddresses mapped to the remote private endpoint"]
-        #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_addresses: Vec<String>,
     }
     impl Properties {
@@ -8506,7 +9006,12 @@ pub mod resource_metric_definition {
         #[serde(rename = "primaryAggregationType", default, skip_serializing_if = "Option::is_none")]
         pub primary_aggregation_type: Option<String>,
         #[doc = "List of time grains supported for the metric together with retention period."]
-        #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "metricAvailabilities",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub metric_availabilities: Vec<ResourceMetricAvailability>,
         #[doc = "Resource URI."]
         #[serde(rename = "resourceUri", default, skip_serializing_if = "Option::is_none")]
@@ -8715,7 +9220,11 @@ pub struct ResponseMessageEnvelopeRemotePrivateEndpointConnection {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<ManagedServiceIdentity>,
     #[doc = "Logical Availability Zones the service is hosted in"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResponseMessageEnvelopeRemotePrivateEndpointConnection {
@@ -8765,7 +9274,11 @@ pub mod restore_request {
         #[serde(rename = "siteName", default, skip_serializing_if = "Option::is_none")]
         pub site_name: Option<String>,
         #[doc = "Collection of databases which should be restored. This list has to match the list of databases included in the backup."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub databases: Vec<DatabaseBackupSetting>,
         #[doc = "Changes a logic when restoring an app with custom domains. <code>true</code> to remove custom domains automatically. If <code>false</code>, custom domains are added to \nthe app's object when it is being restored, but that might fail due to conflicts during the operation."]
         #[serde(rename = "ignoreConflictingHostNames", default, skip_serializing_if = "Option::is_none")]
@@ -8829,7 +9342,11 @@ pub struct SampleUtterance {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub text: Option<String>,
     #[doc = "Links attribute of sample utterance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<String>,
     #[doc = "Question id of sample utterance (for stackoverflow questions titles)."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8843,9 +9360,19 @@ impl SampleUtterance {
 #[doc = "Resource metrics service provided by Microsoft.Insights resource provider."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -8887,7 +9414,12 @@ pub mod site {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub state: Option<String>,
         #[doc = "Hostnames associated with the app."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Name of the repository site."]
         #[serde(rename = "repositorySiteName", default, skip_serializing_if = "Option::is_none")]
@@ -8899,13 +9431,23 @@ pub mod site {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<bool>,
         #[doc = "Enabled hostnames for the app.Hostnames need to be assigned (see HostNames) AND enabled. Otherwise,\nthe app is not served on those hostnames."]
-        #[serde(rename = "enabledHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "enabledHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub enabled_host_names: Vec<String>,
         #[doc = "Management information availability state for the app."]
         #[serde(rename = "availabilityState", default, skip_serializing_if = "Option::is_none")]
         pub availability_state: Option<properties::AvailabilityState>,
         #[doc = "Hostname SSL states are used to manage the SSL bindings for app's hostnames."]
-        #[serde(rename = "hostNameSslStates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNameSslStates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_name_ssl_states: Vec<HostNameSslState>,
         #[doc = "Resource ID of the associated App Service plan, formatted as: \"/subscriptions/{subscriptionID}/resourceGroups/{groupName}/providers/Microsoft.Web/serverfarms/{appServicePlanName}\"."]
         #[serde(rename = "serverFarmId", default, skip_serializing_if = "Option::is_none")]
@@ -8926,7 +9468,12 @@ pub mod site {
         #[serde(rename = "siteConfig", default, skip_serializing_if = "Option::is_none")]
         pub site_config: Option<SiteConfig>,
         #[doc = "Azure Traffic Manager hostnames associated with the app. Read-only."]
-        #[serde(rename = "trafficManagerHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "trafficManagerHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub traffic_manager_host_names: Vec<String>,
         #[doc = "<code>true</code> to stop SCM (KUDU) site when the app is stopped; otherwise, <code>false</code>. The default is <code>false</code>."]
         #[serde(rename = "scmSiteAlsoStopped", default, skip_serializing_if = "Option::is_none")]
@@ -9077,7 +9624,12 @@ pub mod site_auth_settings {
         #[serde(rename = "tokenStoreEnabled", default, skip_serializing_if = "Option::is_none")]
         pub token_store_enabled: Option<bool>,
         #[doc = "External URLs that can be redirected to as part of logging in or logging out of the app. Note that the query string part of the URL is ignored.\nThis is an advanced setting typically only needed by Windows Store application backends.\nNote that URLs within the current domain are always implicitly allowed."]
-        #[serde(rename = "allowedExternalRedirectUrls", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "allowedExternalRedirectUrls",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub allowed_external_redirect_urls: Vec<String>,
         #[doc = "The default authentication provider to use when multiple providers are configured.\nThis setting is only needed if multiple providers are configured and the unauthenticated client\naction is set to \"RedirectToLoginPage\"."]
         #[serde(rename = "defaultProvider", default, skip_serializing_if = "Option::is_none")]
@@ -9104,10 +9656,20 @@ pub mod site_auth_settings {
         #[serde(rename = "validateIssuer", default, skip_serializing_if = "Option::is_none")]
         pub validate_issuer: Option<bool>,
         #[doc = "Allowed audience values to consider when validating JWTs issued by \nAzure Active Directory. Note that the <code>ClientID</code> value is always considered an\nallowed audience, regardless of this setting."]
-        #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "allowedAudiences",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub allowed_audiences: Vec<String>,
         #[doc = "Login parameters to send to the OpenID Connect authorization endpoint when\na user logs in. Each parameter must be in the form \"key=value\"."]
-        #[serde(rename = "additionalLoginParams", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalLoginParams",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_login_params: Vec<String>,
         #[doc = "Gets a JSON string containing the Azure AD Acl settings."]
         #[serde(rename = "aadClaimsAuthorization", default, skip_serializing_if = "Option::is_none")]
@@ -9122,7 +9684,12 @@ pub mod site_auth_settings {
         #[serde(rename = "googleClientSecretSettingName", default, skip_serializing_if = "Option::is_none")]
         pub google_client_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of Google Sign-In authentication.\nThis setting is optional. If not specified, \"openid\", \"profile\", and \"email\" are used as default scopes.\nGoogle Sign-In documentation: https://developers.google.com/identity/sign-in/web/"]
-        #[serde(rename = "googleOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "googleOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub google_o_auth_scopes: Vec<String>,
         #[doc = "The App ID of the Facebook app used for login.\nThis setting is required for enabling Facebook Login.\nFacebook Login documentation: https://developers.facebook.com/docs/facebook-login"]
         #[serde(rename = "facebookAppId", default, skip_serializing_if = "Option::is_none")]
@@ -9134,7 +9701,12 @@ pub mod site_auth_settings {
         #[serde(rename = "facebookAppSecretSettingName", default, skip_serializing_if = "Option::is_none")]
         pub facebook_app_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of Facebook Login authentication.\nThis setting is optional.\nFacebook Login documentation: https://developers.facebook.com/docs/facebook-login"]
-        #[serde(rename = "facebookOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "facebookOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub facebook_o_auth_scopes: Vec<String>,
         #[doc = "The Client Id of the GitHub app used for login.\nThis setting is required for enabling Github login"]
         #[serde(rename = "gitHubClientId", default, skip_serializing_if = "Option::is_none")]
@@ -9146,7 +9718,12 @@ pub mod site_auth_settings {
         #[serde(rename = "gitHubClientSecretSettingName", default, skip_serializing_if = "Option::is_none")]
         pub git_hub_client_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of GitHub Login authentication.\nThis setting is optional"]
-        #[serde(rename = "gitHubOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "gitHubOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub git_hub_o_auth_scopes: Vec<String>,
         #[doc = "The OAuth 1.0a consumer key of the Twitter application used for sign-in.\nThis setting is required for enabling Twitter Sign-In.\nTwitter Sign-In documentation: https://dev.twitter.com/web/sign-in"]
         #[serde(rename = "twitterConsumerKey", default, skip_serializing_if = "Option::is_none")]
@@ -9171,7 +9748,12 @@ pub mod site_auth_settings {
         )]
         pub microsoft_account_client_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of Microsoft Account authentication.\nThis setting is optional. If not specified, \"wl.basic\" is used as the default scope.\nMicrosoft Account Scopes and permissions documentation: https://msdn.microsoft.com/en-us/library/dn631845.aspx"]
-        #[serde(rename = "microsoftAccountOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "microsoftAccountOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub microsoft_account_o_auth_scopes: Vec<String>,
         #[doc = "\"true\" if the auth config settings should be read from a file,\n\"false\" otherwise"]
         #[serde(rename = "isAuthFromFile", default, skip_serializing_if = "Option::is_none")]
@@ -9256,13 +9838,28 @@ pub struct SiteCloneability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub result: Option<site_cloneability::Result>,
     #[doc = "List of features enabled on app that prevent cloning."]
-    #[serde(rename = "blockingFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockingFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocking_features: Vec<SiteCloneabilityCriterion>,
     #[doc = "List of features enabled on app that are non-blocking but cannot be cloned. The app can still be cloned\nbut the features in this list will not be set up on cloned app."]
-    #[serde(rename = "unsupportedFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "unsupportedFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unsupported_features: Vec<SiteCloneabilityCriterion>,
     #[doc = "List of blocking application characteristics."]
-    #[serde(rename = "blockingCharacteristics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockingCharacteristics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocking_characteristics: Vec<SiteCloneabilityCriterion>,
 }
 impl SiteCloneability {
@@ -9302,7 +9899,12 @@ pub struct SiteConfig {
     #[serde(rename = "numberOfWorkers", default, skip_serializing_if = "Option::is_none")]
     pub number_of_workers: Option<i32>,
     #[doc = "Default documents."]
-    #[serde(rename = "defaultDocuments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultDocuments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_documents: Vec<String>,
     #[doc = ".NET Framework version."]
     #[serde(rename = "netFrameworkVersion", default, skip_serializing_if = "Option::is_none")]
@@ -9356,16 +9958,31 @@ pub struct SiteConfig {
     #[serde(rename = "publishingUsername", default, skip_serializing_if = "Option::is_none")]
     pub publishing_username: Option<String>,
     #[doc = "Application settings."]
-    #[serde(rename = "appSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_settings: Vec<NameValuePair>,
     #[doc = "Connection strings."]
-    #[serde(rename = "connectionStrings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionStrings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_strings: Vec<ConnStringInfo>,
     #[doc = "MachineKey of an app."]
     #[serde(rename = "machineKey", default, skip_serializing_if = "Option::is_none")]
     pub machine_key: Option<SiteMachineKey>,
     #[doc = "Handler mappings."]
-    #[serde(rename = "handlerMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "handlerMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub handler_mappings: Vec<HandlerMapping>,
     #[doc = "Document root."]
     #[serde(rename = "documentRoot", default, skip_serializing_if = "Option::is_none")]
@@ -9398,7 +10015,12 @@ pub struct SiteConfig {
     #[serde(rename = "managedPipelineMode", default, skip_serializing_if = "Option::is_none")]
     pub managed_pipeline_mode: Option<site_config::ManagedPipelineMode>,
     #[doc = "Virtual applications."]
-    #[serde(rename = "virtualApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_applications: Vec<VirtualApplication>,
     #[doc = "Site load balancing."]
     #[serde(rename = "loadBalancing", default, skip_serializing_if = "Option::is_none")]
@@ -9455,10 +10077,20 @@ pub struct SiteConfig {
     #[serde(rename = "keyVaultReferenceIdentity", default, skip_serializing_if = "Option::is_none")]
     pub key_vault_reference_identity: Option<String>,
     #[doc = "IP security restrictions for main."]
-    #[serde(rename = "ipSecurityRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipSecurityRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_security_restrictions: Vec<IpSecurityRestriction>,
     #[doc = "IP security restrictions for scm."]
-    #[serde(rename = "scmIpSecurityRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scmIpSecurityRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scm_ip_security_restrictions: Vec<IpSecurityRestriction>,
     #[doc = "IP security restrictions for scm to use main."]
     #[serde(rename = "scmIpSecurityRestrictionsUseMain", default, skip_serializing_if = "Option::is_none")]
@@ -9873,7 +10505,11 @@ pub mod site_extension_info {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub feed_url: Option<String>,
         #[doc = "List of authors."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub authors: Vec<String>,
         #[doc = "Installer command line parameters."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10038,7 +10674,12 @@ pub mod site_patch_resource {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub state: Option<String>,
         #[doc = "Hostnames associated with the app."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Name of the repository site."]
         #[serde(rename = "repositorySiteName", default, skip_serializing_if = "Option::is_none")]
@@ -10050,13 +10691,23 @@ pub mod site_patch_resource {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<bool>,
         #[doc = "Enabled hostnames for the app.Hostnames need to be assigned (see HostNames) AND enabled. Otherwise,\nthe app is not served on those hostnames."]
-        #[serde(rename = "enabledHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "enabledHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub enabled_host_names: Vec<String>,
         #[doc = "Management information availability state for the app."]
         #[serde(rename = "availabilityState", default, skip_serializing_if = "Option::is_none")]
         pub availability_state: Option<properties::AvailabilityState>,
         #[doc = "Hostname SSL states are used to manage the SSL bindings for app's hostnames."]
-        #[serde(rename = "hostNameSslStates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNameSslStates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_name_ssl_states: Vec<HostNameSslState>,
         #[doc = "Resource ID of the associated App Service plan, formatted as: \"/subscriptions/{subscriptionID}/resourceGroups/{groupName}/providers/Microsoft.Web/serverfarms/{appServicePlanName}\"."]
         #[serde(rename = "serverFarmId", default, skip_serializing_if = "Option::is_none")]
@@ -10077,7 +10728,12 @@ pub mod site_patch_resource {
         #[serde(rename = "siteConfig", default, skip_serializing_if = "Option::is_none")]
         pub site_config: Option<SiteConfig>,
         #[doc = "Azure Traffic Manager hostnames associated with the app. Read-only."]
-        #[serde(rename = "trafficManagerHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "trafficManagerHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub traffic_manager_host_names: Vec<String>,
         #[doc = "<code>true</code> to stop SCM (KUDU) site when the app is stopped; otherwise, <code>false</code>. The default is <code>false</code>."]
         #[serde(rename = "scmSiteAlsoStopped", default, skip_serializing_if = "Option::is_none")]
@@ -10353,10 +11009,18 @@ pub struct SkuDescription {
     #[serde(rename = "skuCapacity", default, skip_serializing_if = "Option::is_none")]
     pub sku_capacity: Option<SkuCapacity>,
     #[doc = "Locations of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Capabilities of the SKU, e.g., is traffic manager enabled?"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
 }
 impl SkuDescription {
@@ -10409,7 +11073,11 @@ pub struct SkuInfos {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "List of SKUs the subscription is able to use."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skus: Vec<GlobalCsmSkuDescription>,
 }
 impl SkuInfos {
@@ -10421,13 +11089,28 @@ impl SkuInfos {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SlotConfigNames {
     #[doc = "List of connection string names."]
-    #[serde(rename = "connectionStringNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionStringNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_string_names: Vec<String>,
     #[doc = "List of application settings names."]
-    #[serde(rename = "appSettingNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appSettingNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_setting_names: Vec<String>,
     #[doc = "List of external Azure storage account identifiers."]
-    #[serde(rename = "azureStorageConfigNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureStorageConfigNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_storage_config_names: Vec<String>,
 }
 impl SlotConfigNames {
@@ -10688,10 +11371,18 @@ pub struct Solution {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<solution::Type>,
     #[doc = "Solution Data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<Vec<NameValuePair>>,
     #[doc = "Solution Metadata."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<Vec<NameValuePair>>,
 }
 impl Solution {
@@ -10780,7 +11471,12 @@ pub struct StackMajorVersion {
     #[serde(rename = "isDefault", default, skip_serializing_if = "Option::is_none")]
     pub is_default: Option<bool>,
     #[doc = "Minor versions associated with the major version."]
-    #[serde(rename = "minorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "minorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minor_versions: Vec<StackMinorVersion>,
     #[doc = "<code>true</code> if this supports Application Insights; otherwise, <code>false</code>."]
     #[serde(rename = "applicationInsights", default, skip_serializing_if = "Option::is_none")]
@@ -10928,7 +11624,12 @@ pub struct StaticSite {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub branch: Option<String>,
     #[doc = "The custom domains associated with this static site."]
-    #[serde(rename = "customDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_domains: Vec<String>,
     #[doc = "A user's github repository token. This is used to setup the Github Actions workflow file and API secrets."]
     #[serde(rename = "repositoryToken", default, skip_serializing_if = "Option::is_none")]
@@ -10937,7 +11638,12 @@ pub struct StaticSite {
     #[serde(rename = "buildProperties", default, skip_serializing_if = "Option::is_none")]
     pub build_properties: Option<StaticSiteBuildProperties>,
     #[doc = "Private endpoint connections"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ResponseMessageEnvelopeRemotePrivateEndpointConnection>,
     #[doc = "State indicating whether staging environments are allowed or not allowed for a static web app."]
     #[serde(rename = "stagingEnvironmentPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -10955,7 +11661,12 @@ pub struct StaticSite {
     #[serde(rename = "keyVaultReferenceIdentity", default, skip_serializing_if = "Option::is_none")]
     pub key_vault_reference_identity: Option<String>,
     #[doc = "User provided function apps registered with the static site"]
-    #[serde(rename = "userProvidedFunctionApps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userProvidedFunctionApps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_provided_function_apps: Vec<StaticSiteUserProvidedFunctionApp>,
     #[doc = "The provider that submitted the last deployment to the primary environment of the static site."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11041,7 +11752,12 @@ pub mod static_site_build_arm_resource {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub status: Option<properties::Status>,
         #[doc = "User provided function apps registered with the static site build"]
-        #[serde(rename = "userProvidedFunctionApps", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "userProvidedFunctionApps",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub user_provided_function_apps: Vec<StaticSiteUserProvidedFunctionApp>,
     }
     impl Properties {
@@ -11964,7 +12680,11 @@ pub struct StringList {
     #[serde(flatten)]
     pub proxy_only_resource: ProxyOnlyResource,
     #[doc = "List of string resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub properties: Vec<String>,
 }
 impl StringList {
@@ -12168,7 +12888,11 @@ pub mod triggered_job_history {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "List of triggered web job runs."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub runs: Vec<TriggeredJobRun>,
     }
     impl Properties {
@@ -12653,7 +13377,12 @@ pub struct VirtualApplication {
     #[serde(rename = "preloadEnabled", default, skip_serializing_if = "Option::is_none")]
     pub preload_enabled: Option<bool>,
     #[doc = "Virtual directories for virtual application."]
-    #[serde(rename = "virtualDirectories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualDirectories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_directories: Vec<VirtualDirectory>,
 }
 impl VirtualApplication {
@@ -12773,7 +13502,11 @@ pub struct VnetInfo {
     #[serde(rename = "certBlob", default, skip_serializing_if = "Option::is_none")]
     pub cert_blob: Option<String>,
     #[doc = "The routes that this Virtual Network connection uses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<VnetRoute>,
     #[doc = "<code>true</code> if a resync is required; otherwise, <code>false</code>."]
     #[serde(rename = "resyncRequired", default, skip_serializing_if = "Option::is_none")]
@@ -12948,10 +13681,19 @@ pub mod vnet_validation_failure_details {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub failed: Option<bool>,
         #[doc = "A list of tests that failed in the validation."]
-        #[serde(rename = "failedTests", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "failedTests",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub failed_tests: Vec<VnetValidationTestFailure>,
         #[doc = "A list of warnings generated during validation."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub warnings: Vec<VnetValidationTestFailure>,
     }
     impl Properties {
@@ -13042,7 +13784,12 @@ pub struct WebAppMajorVersion {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     #[doc = "Minor versions associated with the major version."]
-    #[serde(rename = "minorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "minorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minor_versions: Vec<WebAppMinorVersion>,
 }
 impl WebAppMajorVersion {
@@ -13157,7 +13904,12 @@ pub mod web_app_stack {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub value: Option<String>,
         #[doc = "List of major versions available."]
-        #[serde(rename = "majorVersions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "majorVersions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub major_versions: Vec<WebAppMajorVersion>,
         #[doc = "Web App stack preferred OS."]
         #[serde(rename = "preferredOs", default, skip_serializing_if = "Option::is_none")]
@@ -13376,7 +14128,12 @@ pub struct WorkerPool {
     #[serde(rename = "workerCount", default, skip_serializing_if = "Option::is_none")]
     pub worker_count: Option<i32>,
     #[doc = "Names of all instances in the worker pool (read only)."]
-    #[serde(rename = "instanceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "instanceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instance_names: Vec<String>,
 }
 impl WorkerPool {
diff --git a/services/mgmt/web/src/package_2021_03/models.rs b/services/mgmt/web/src/package_2021_03/models.rs
index 41fabbd048..5b7888eb50 100644
--- a/services/mgmt/web/src/package_2021_03/models.rs
+++ b/services/mgmt/web/src/package_2021_03/models.rs
@@ -13,10 +13,18 @@ pub struct AbnormalTimePeriod {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "List of Possible Cause of downtime"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<DetectorAbnormalTimePeriod>,
     #[doc = "List of proposed solutions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub solutions: Vec<Solution>,
 }
 impl AbnormalTimePeriod {
@@ -80,10 +88,20 @@ pub mod address_response {
         #[serde(rename = "internalIpAddress", default, skip_serializing_if = "Option::is_none")]
         pub internal_ip_address: Option<String>,
         #[doc = "IP addresses appearing on outbound connections."]
-        #[serde(rename = "outboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "outboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub outbound_ip_addresses: Vec<String>,
         #[doc = "Additional virtual IPs."]
-        #[serde(rename = "vipMappings", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "vipMappings",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub vip_mappings: Vec<VirtualIpMapping>,
     }
     impl Properties {
@@ -96,7 +114,12 @@ pub mod address_response {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedAudiencesValidation {
     #[doc = "The configuration settings of the allowed list of audiences from which to validate the JWT token."]
-    #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAudiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_audiences: Vec<String>,
 }
 impl AllowedAudiencesValidation {
@@ -108,10 +131,18 @@ impl AllowedAudiencesValidation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedPrincipals {
     #[doc = "The list of the allowed groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<String>,
     #[doc = "The list of the allowed identities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identities: Vec<String>,
 }
 impl AllowedPrincipals {
@@ -129,10 +160,18 @@ pub struct AnalysisData {
     #[serde(rename = "detectorDefinition", default, skip_serializing_if = "Option::is_none")]
     pub detector_definition: Option<DetectorDefinition>,
     #[doc = "Source Metrics"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<DiagnosticMetricSet>,
     #[doc = "Additional Source Data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<Vec<NameValuePair>>,
     #[serde(rename = "detectorMetaData", default, skip_serializing_if = "Option::is_none")]
     pub detector_meta_data: Option<ResponseMetaData>,
@@ -456,6 +495,7 @@ pub mod app_service_certificate_order {
         #[serde(
             rename = "appServiceCertificateNotRenewableReasons",
             default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
             skip_serializing_if = "Vec::is_empty"
         )]
         pub app_service_certificate_not_renewable_reasons: Vec<String>,
@@ -618,6 +658,7 @@ pub mod app_service_certificate_order_patch_resource {
         #[serde(
             rename = "appServiceCertificateNotRenewableReasons",
             default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
             skip_serializing_if = "Vec::is_empty"
         )]
         pub app_service_certificate_not_renewable_reasons: Vec<String>,
@@ -754,10 +795,20 @@ pub struct AppServiceEnvironment {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub suspended: Option<bool>,
     #[doc = "Custom settings for changing the behavior of the App Service Environment."]
-    #[serde(rename = "clusterSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_settings: Vec<NameValuePair>,
     #[doc = "User added ip ranges to whitelist on ASE db"]
-    #[serde(rename = "userWhitelistedIpRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userWhitelistedIpRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_whitelisted_ip_ranges: Vec<String>,
     #[doc = "Flag that displays whether an ASE has linux workers or not"]
     #[serde(rename = "hasLinuxWorkers", default, skip_serializing_if = "Option::is_none")]
@@ -1221,13 +1272,27 @@ pub struct ApplicationStack {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub dependency: Option<String>,
     #[doc = "List of major versions available."]
-    #[serde(rename = "majorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "majorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub major_versions: Vec<StackMajorVersion>,
     #[doc = "List of frameworks associated with application stack."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frameworks: Vec<ApplicationStack>,
     #[doc = "<code>true</code> if this is the stack is deprecated; otherwise, <code>false</code>."]
-    #[serde(rename = "isDeprecated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "isDeprecated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub is_deprecated: Vec<ApplicationStack>,
 }
 impl ApplicationStack {
@@ -1390,13 +1455,33 @@ pub mod ase_v3_networking_configuration {
     #[doc = "AseV3NetworkingConfiguration resource specific properties"]
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
-        #[serde(rename = "windowsOutboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "windowsOutboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub windows_outbound_ip_addresses: Vec<String>,
-        #[serde(rename = "linuxOutboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "linuxOutboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub linux_outbound_ip_addresses: Vec<String>,
-        #[serde(rename = "externalInboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "externalInboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub external_inbound_ip_addresses: Vec<String>,
-        #[serde(rename = "internalInboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "internalInboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub internal_inbound_ip_addresses: Vec<String>,
         #[doc = "Property to enable and disable new private endpoint connection creation on ASE"]
         #[serde(rename = "allowNewPrivateEndpointConnections", default, skip_serializing_if = "Option::is_none")]
@@ -1494,16 +1579,31 @@ pub struct AutoHealTriggers {
     #[serde(rename = "privateBytesInKB", default, skip_serializing_if = "Option::is_none")]
     pub private_bytes_in_kb: Option<i32>,
     #[doc = "A rule based on status codes."]
-    #[serde(rename = "statusCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_codes: Vec<StatusCodesBasedTrigger>,
     #[doc = "Trigger based on request execution time."]
     #[serde(rename = "slowRequests", default, skip_serializing_if = "Option::is_none")]
     pub slow_requests: Option<SlowRequestsBasedTrigger>,
     #[doc = "A rule based on multiple Slow Requests Rule with path"]
-    #[serde(rename = "slowRequestsWithPath", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "slowRequestsWithPath",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub slow_requests_with_path: Vec<SlowRequestsBasedTrigger>,
     #[doc = "A rule based on status codes ranges."]
-    #[serde(rename = "statusCodesRange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusCodesRange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_codes_range: Vec<StatusCodesRangeBasedTrigger>,
 }
 impl AutoHealTriggers {
@@ -1539,7 +1639,12 @@ impl AzureActiveDirectory {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureActiveDirectoryLogin {
     #[doc = "Login parameters to send to the OpenID Connect authorization endpoint when\na user logs in. Each parameter must be in the form \"key=value\"."]
-    #[serde(rename = "loginParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_parameters: Vec<String>,
     #[doc = "<code>true</code> if the www-authenticate provider should be omitted from the request; otherwise, <code>false</code>."]
     #[serde(rename = "disableWWWAuthenticate", default, skip_serializing_if = "Option::is_none")]
@@ -1588,7 +1693,12 @@ pub struct AzureActiveDirectoryValidation {
     #[serde(rename = "jwtClaimChecks", default, skip_serializing_if = "Option::is_none")]
     pub jwt_claim_checks: Option<JwtClaimChecks>,
     #[doc = "The list of audiences that can make successful authentication/authorization requests."]
-    #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAudiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_audiences: Vec<String>,
     #[doc = "The configuration settings of the Azure Active Directory default authorization policy."]
     #[serde(rename = "defaultAuthorizationPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -1803,7 +1913,11 @@ pub mod backup_item {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub log: Option<String>,
         #[doc = "List of databases included in the backup."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub databases: Vec<DatabaseBackupSetting>,
         #[doc = "True if this backup has been created due to a schedule being triggered."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1896,7 +2010,11 @@ pub mod backup_request {
         #[serde(rename = "backupSchedule", default, skip_serializing_if = "Option::is_none")]
         pub backup_schedule: Option<BackupSchedule>,
         #[doc = "Databases included in the backup."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub databases: Vec<DatabaseBackupSetting>,
     }
     impl Properties {
@@ -2093,7 +2211,12 @@ pub mod certificate {
         #[serde(rename = "subjectName", default, skip_serializing_if = "Option::is_none")]
         pub subject_name: Option<String>,
         #[doc = "Host names the certificate applies to."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Pfx blob."]
         #[serde(rename = "pfxBlob", default, skip_serializing_if = "Option::is_none")]
@@ -2357,7 +2480,12 @@ pub mod certificate_patch_resource {
         #[serde(rename = "subjectName", default, skip_serializing_if = "Option::is_none")]
         pub subject_name: Option<String>,
         #[doc = "Host names the certificate applies to."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Pfx blob."]
         #[serde(rename = "pfxBlob", default, skip_serializing_if = "Option::is_none")]
@@ -2508,7 +2636,11 @@ impl CloningInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Configuration {
     #[doc = "Collection of secrets used by a Container app"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<Secret>,
     #[doc = "ActiveRevisionsMode controls how active revisions are handled for the Container app:\n<list><item>Multiple: multiple revisions can be active. If no value if provided, this is the default</item><item>Single: Only one revision can be active at a time. Revision weights can not be used in this mode</item></list>"]
     #[serde(rename = "activeRevisionsMode", default, skip_serializing_if = "Option::is_none")]
@@ -2517,7 +2649,11 @@ pub struct Configuration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub ingress: Option<Ingress>,
     #[doc = "Collection of private container registry credentials for containers used by the Container app"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub registries: Vec<RegistryCredentials>,
 }
 impl Configuration {
@@ -2709,13 +2845,25 @@ pub struct Container {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Container start command."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "Container start command arguments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub args: Vec<String>,
     #[doc = "Container environment variables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub env: Vec<EnvironmentVar>,
     #[doc = "Container App container resource requirements."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2898,7 +3046,12 @@ impl ContainerCpuStatistics {
 pub struct ContainerCpuUsage {
     #[serde(rename = "totalUsage", default, skip_serializing_if = "Option::is_none")]
     pub total_usage: Option<i64>,
-    #[serde(rename = "perCpuUsage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "perCpuUsage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub per_cpu_usage: Vec<i64>,
     #[serde(rename = "kernelModeUsage", default, skip_serializing_if = "Option::is_none")]
     pub kernel_mode_usage: Option<i64>,
@@ -3123,7 +3276,12 @@ pub mod cookie_expiration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CorsSettings {
     #[doc = "Gets or sets the list of origins that should be allowed to make cross-origin\ncalls (for example: http://example.com:12345). Use \"*\" to allow all."]
-    #[serde(rename = "allowedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_origins: Vec<String>,
     #[doc = "Gets or sets whether CORS requests with credentials are allowed. See \nhttps://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#Requests_with_credentials\nfor more details."]
     #[serde(rename = "supportCredentials", default, skip_serializing_if = "Option::is_none")]
@@ -3139,7 +3297,11 @@ impl CorsSettings {
 pub struct CsmMoveResourceEnvelope {
     #[serde(rename = "targetResourceGroup", default, skip_serializing_if = "Option::is_none")]
     pub target_resource_group: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
 }
 impl CsmMoveResourceEnvelope {
@@ -3402,19 +3564,44 @@ pub mod custom_hostname_analysis_result {
         #[serde(rename = "conflictingAppResourceId", default, skip_serializing_if = "Option::is_none")]
         pub conflicting_app_resource_id: Option<String>,
         #[doc = "CName records controller can see for this hostname."]
-        #[serde(rename = "cNameRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "cNameRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub c_name_records: Vec<String>,
         #[doc = "TXT records controller can see for this hostname."]
-        #[serde(rename = "txtRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "txtRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub txt_records: Vec<String>,
         #[doc = "A records controller can see for this hostname."]
-        #[serde(rename = "aRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "aRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub a_records: Vec<String>,
         #[doc = "Alternate CName records controller can see for this hostname."]
-        #[serde(rename = "alternateCNameRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "alternateCNameRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub alternate_c_name_records: Vec<String>,
         #[doc = "Alternate TXT records controller can see for this hostname."]
-        #[serde(rename = "alternateTxtRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "alternateTxtRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub alternate_txt_records: Vec<String>,
     }
     impl Properties {
@@ -3456,7 +3643,12 @@ pub mod custom_hostname_sites {
         pub custom_hostname: Option<String>,
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub region: Option<String>,
-        #[serde(rename = "siteResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "siteResourceIds",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub site_resource_ids: Vec<Identifier>,
     }
     impl Properties {
@@ -3513,7 +3705,11 @@ pub struct CustomScaleRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
     #[doc = "Authentication secrets for the custom scale rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auth: Vec<ScaleRuleAuth>,
 }
 impl CustomScaleRule {
@@ -3534,7 +3730,11 @@ pub struct Dapr {
     #[serde(rename = "appPort", default, skip_serializing_if = "Option::is_none")]
     pub app_port: Option<i32>,
     #[doc = "Collection of Dapr components"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub components: Vec<DaprComponent>,
 }
 impl Dapr {
@@ -3555,7 +3755,11 @@ pub struct DaprComponent {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "Component metadata"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<DaprMetadata>,
 }
 impl DaprComponent {
@@ -3587,7 +3791,12 @@ pub struct DataProviderMetadata {
     #[serde(rename = "providerName", default, skip_serializing_if = "Option::is_none")]
     pub provider_name: Option<String>,
     #[doc = "Settings for the data provider"]
-    #[serde(rename = "propertyBag", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyBag",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_bag: Vec<KeyValuePairStringObject>,
 }
 impl DataProviderMetadata {
@@ -3599,10 +3808,19 @@ impl DataProviderMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataSource {
     #[doc = "Instructions if any for the data source"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instructions: Vec<String>,
     #[doc = "Datasource Uri Links"]
-    #[serde(rename = "dataSourceUri", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSourceUri",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_source_uri: Vec<NameValuePair>,
 }
 impl DataSource {
@@ -3635,10 +3853,18 @@ pub struct DataTableResponseObject {
     #[serde(rename = "tableName", default, skip_serializing_if = "Option::is_none")]
     pub table_name: Option<String>,
     #[doc = "List of columns with data types"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<DataTableResponseColumn>,
     #[doc = "Raw row values"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rows: Vec<Vec<String>>,
 }
 impl DataTableResponseObject {
@@ -3722,7 +3948,12 @@ pub struct DefaultAuthorizationPolicy {
     #[serde(rename = "allowedPrincipals", default, skip_serializing_if = "Option::is_none")]
     pub allowed_principals: Option<AllowedPrincipals>,
     #[doc = "The configuration settings of the Azure Active Directory allowed applications."]
-    #[serde(rename = "allowedApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_applications: Vec<String>,
 }
 impl DefaultAuthorizationPolicy {
@@ -3762,7 +3993,11 @@ pub mod default_error_response {
         #[doc = "Detailed error description and debugging information."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<serde_json::Value>,
         #[doc = "More information to debug error."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3959,13 +4194,27 @@ impl DeploymentCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeploymentLocations {
     #[doc = "Available regions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<GeoRegion>,
     #[doc = "Available App Service Environments with full descriptions of the environments."]
-    #[serde(rename = "hostingEnvironments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostingEnvironments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosting_environments: Vec<AppServiceEnvironment>,
     #[doc = "Available App Service Environments with basic information."]
-    #[serde(rename = "hostingEnvironmentDeploymentInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostingEnvironmentDeploymentInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosting_environment_deployment_infos: Vec<HostingEnvironmentDeploymentInfo>,
 }
 impl DeploymentLocations {
@@ -3992,13 +4241,22 @@ pub struct DetectorAbnormalTimePeriod {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub priority: Option<f64>,
     #[doc = "Downtime metadata"]
-    #[serde(rename = "metaData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metaData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meta_data: Vec<Vec<NameValuePair>>,
     #[doc = "Represents the type of the Detector"]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<detector_abnormal_time_period::Type>,
     #[doc = "List of proposed solutions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub solutions: Vec<Solution>,
 }
 impl DetectorAbnormalTimePeriod {
@@ -4075,10 +4333,20 @@ pub struct DetectorInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "List of Support Topics for which this detector is enabled."]
-    #[serde(rename = "supportTopicList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportTopicList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub support_topic_list: Vec<SupportTopic>,
     #[doc = "Analysis Types for which this detector should apply to."]
-    #[serde(rename = "analysisType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "analysisType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub analysis_type: Vec<String>,
     #[doc = "Whether this detector is an Analysis Detector or not."]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
@@ -4125,13 +4393,22 @@ pub mod detector_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub metadata: Option<DetectorInfo>,
         #[doc = "Data Set"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub dataset: Vec<DiagnosticData>,
         #[doc = "Identify the status of the most severe insight generated by the detector."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub status: Option<Status>,
         #[doc = "Additional configuration for different data providers to be used by the UI"]
-        #[serde(rename = "dataProvidersMetadata", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "dataProvidersMetadata",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub data_providers_metadata: Vec<DataProviderMetadata>,
         #[doc = "Suggested utterances where the detector can be applicable"]
         #[serde(rename = "suggestedUtterances", default, skip_serializing_if = "Option::is_none")]
@@ -4189,13 +4466,27 @@ pub mod diagnostic_analysis {
         #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
         pub end_time: Option<time::OffsetDateTime>,
         #[doc = "List of time periods."]
-        #[serde(rename = "abnormalTimePeriods", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "abnormalTimePeriods",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub abnormal_time_periods: Vec<AbnormalTimePeriod>,
         #[doc = "Data by each detector"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub payload: Vec<AnalysisData>,
         #[doc = "Data by each detector for detectors that did not corelate"]
-        #[serde(rename = "nonCorrelatedDetectors", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "nonCorrelatedDetectors",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub non_correlated_detectors: Vec<DetectorDefinition>,
     }
     impl Properties {
@@ -4340,13 +4631,26 @@ pub mod diagnostic_detector_response {
         #[serde(rename = "detectorDefinition", default, skip_serializing_if = "Option::is_none")]
         pub detector_definition: Option<DetectorDefinition>,
         #[doc = "Metrics provided by the detector"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub metrics: Vec<DiagnosticMetricSet>,
         #[doc = "List of Correlated events found by the detector"]
-        #[serde(rename = "abnormalTimePeriods", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "abnormalTimePeriods",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub abnormal_time_periods: Vec<DetectorAbnormalTimePeriod>,
         #[doc = "Additional Data that detector wants to send."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub data: Vec<Vec<NameValuePair>>,
         #[serde(rename = "responseMetaData", default, skip_serializing_if = "Option::is_none")]
         pub response_meta_data: Option<ResponseMetaData>,
@@ -4403,7 +4707,11 @@ pub struct DiagnosticMetricSet {
     #[serde(rename = "timeGrain", default, skip_serializing_if = "Option::is_none")]
     pub time_grain: Option<String>,
     #[doc = "Collection of metric values for the selected period based on the {Microsoft.Web.Hosting.Administration.DiagnosticMetricSet.TimeGrain}"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<DiagnosticMetricSample>,
 }
 impl DiagnosticMetricSet {
@@ -4469,7 +4777,12 @@ pub mod domain {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<properties::ProvisioningState>,
         #[doc = "Name servers."]
-        #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "nameServers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub name_servers: Vec<String>,
         #[doc = "<code>true</code> if domain privacy is enabled for this domain; otherwise, <code>false</code>."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4490,12 +4803,22 @@ pub mod domain {
         #[serde(rename = "readyForDnsRecordManagement", default, skip_serializing_if = "Option::is_none")]
         pub ready_for_dns_record_management: Option<bool>,
         #[doc = "All hostnames derived from the domain and assigned to Azure resources."]
-        #[serde(rename = "managedHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "managedHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub managed_host_names: Vec<HostName>,
         #[doc = "Domain purchase consent object, representing acceptance of applicable legal agreements."]
         pub consent: DomainPurchaseConsent,
         #[doc = "Reasons why domain is not renewable."]
-        #[serde(rename = "domainNotRenewableReasons", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "domainNotRenewableReasons",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub domain_not_renewable_reasons: Vec<String>,
         #[doc = "Current DNS type"]
         #[serde(rename = "dnsType", default, skip_serializing_if = "Option::is_none")]
@@ -4743,7 +5066,12 @@ pub mod domain_patch_resource {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<properties::ProvisioningState>,
         #[doc = "Name servers."]
-        #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "nameServers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub name_servers: Vec<String>,
         #[doc = "<code>true</code> if domain privacy is enabled for this domain; otherwise, <code>false</code>."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4764,12 +5092,22 @@ pub mod domain_patch_resource {
         #[serde(rename = "readyForDnsRecordManagement", default, skip_serializing_if = "Option::is_none")]
         pub ready_for_dns_record_management: Option<bool>,
         #[doc = "All hostnames derived from the domain and assigned to Azure resources."]
-        #[serde(rename = "managedHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "managedHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub managed_host_names: Vec<HostName>,
         #[doc = "Domain purchase consent object, representing acceptance of applicable legal agreements."]
         pub consent: DomainPurchaseConsent,
         #[doc = "Reasons why domain is not renewable."]
-        #[serde(rename = "domainNotRenewableReasons", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "domainNotRenewableReasons",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub domain_not_renewable_reasons: Vec<String>,
         #[doc = "Current DNS type"]
         #[serde(rename = "dnsType", default, skip_serializing_if = "Option::is_none")]
@@ -4869,7 +5207,12 @@ pub mod domain_patch_resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainPurchaseConsent {
     #[doc = "List of applicable legal agreement keys. This list can be retrieved using ListLegalAgreements API under <code>TopLevelDomain</code> resource."]
-    #[serde(rename = "agreementKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agreementKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agreement_keys: Vec<String>,
     #[doc = "Client IP address."]
     #[serde(rename = "agreedBy", default, skip_serializing_if = "Option::is_none")]
@@ -4917,7 +5260,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The IP Addresses and Ports used when connecting to DomainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -4974,13 +5322,26 @@ pub struct ErrorEntity {
     #[serde(rename = "messageTemplate", default, skip_serializing_if = "Option::is_none")]
     pub message_template: Option<String>,
     #[doc = "Parameters for the template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<String>,
     #[doc = "Inner errors."]
-    #[serde(rename = "innerErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "innerErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inner_errors: Vec<ErrorEntity>,
     #[doc = "Error Details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorEntity>,
     #[doc = "The error target."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5001,7 +5362,12 @@ impl ErrorEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Experiments {
     #[doc = "List of ramp-up rules."]
-    #[serde(rename = "rampUpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rampUpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ramp_up_rules: Vec<RampUpRule>,
 }
 impl Experiments {
@@ -5160,7 +5526,12 @@ pub struct FunctionAppMajorVersion {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     #[doc = "Minor versions associated with the major version."]
-    #[serde(rename = "minorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "minorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minor_versions: Vec<FunctionAppMinorVersion>,
 }
 impl FunctionAppMajorVersion {
@@ -5208,7 +5579,12 @@ pub struct FunctionAppRuntimeSettings {
     #[serde(rename = "siteConfigPropertiesDictionary", default, skip_serializing_if = "Option::is_none")]
     pub site_config_properties_dictionary: Option<SiteConfigPropertiesDictionary>,
     #[doc = "List of supported Functions extension versions."]
-    #[serde(rename = "supportedFunctionsExtensionVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFunctionsExtensionVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_functions_extension_versions: Vec<String>,
     #[doc = "<code>true</code> if the stack is in preview; otherwise, <code>false</code>."]
     #[serde(rename = "isPreview", default, skip_serializing_if = "Option::is_none")]
@@ -5281,7 +5657,12 @@ pub mod function_app_stack {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub value: Option<String>,
         #[doc = "List of major versions available."]
-        #[serde(rename = "majorVersions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "majorVersions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub major_versions: Vec<FunctionAppMajorVersion>,
         #[doc = "Function App stack preferred OS."]
         #[serde(rename = "preferredOs", default, skip_serializing_if = "Option::is_none")]
@@ -5586,10 +5967,18 @@ pub struct GlobalCsmSkuDescription {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<SkuCapacity>,
     #[doc = "Locations of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Capabilities of the SKU, e.g., is traffic manager enabled?"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
 }
 impl GlobalCsmSkuDescription {
@@ -5610,7 +5999,12 @@ pub struct GlobalValidation {
     #[serde(rename = "redirectToProvider", default, skip_serializing_if = "Option::is_none")]
     pub redirect_to_provider: Option<String>,
     #[doc = "The paths for which unauthenticated flow would not be redirected to the login page."]
-    #[serde(rename = "excludedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_paths: Vec<String>,
 }
 impl GlobalValidation {
@@ -5693,7 +6087,12 @@ pub struct HostName {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of apps the hostname is assigned to. This list will have more than one app only if the hostname is pointing to a Traffic Manager."]
-    #[serde(rename = "siteNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "siteNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub site_names: Vec<String>,
     #[doc = "Name of the Azure resource the hostname is assigned to. If it is assigned to a Traffic Manager then it will be the Traffic Manager name otherwise it will be the app name."]
     #[serde(rename = "azureResourceName", default, skip_serializing_if = "Option::is_none")]
@@ -5948,7 +6347,11 @@ pub struct HttpScaleRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
     #[doc = "Authentication secrets for the custom scale rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auth: Vec<ScaleRuleAuth>,
 }
 impl HttpScaleRule {
@@ -6212,10 +6615,18 @@ pub struct InboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The IP addresses that network traffic will originate from in cidr notation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<String>,
     #[doc = "The ports that network traffic will arrive to the App Service Environment at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<String>,
 }
 impl InboundEnvironmentEndpoint {
@@ -6258,7 +6669,11 @@ pub struct Ingress {
     #[doc = "Ingress transport protocol"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub transport: Option<ingress::Transport>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traffic: Vec<TrafficWeight>,
     #[doc = "Bool indicating if HTTP connections to is allowed. If set to false HTTP connections are automatically redirected to HTTPS connections"]
     #[serde(rename = "allowInsecure", default, skip_serializing_if = "Option::is_none")]
@@ -6402,10 +6817,20 @@ pub mod ip_security_restriction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JwtClaimChecks {
     #[doc = "The list of the allowed groups."]
-    #[serde(rename = "allowedGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_groups: Vec<String>,
     #[doc = "The list of the allowed client applications."]
-    #[serde(rename = "allowedClientApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedClientApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_client_applications: Vec<String>,
 }
 impl JwtClaimChecks {
@@ -6731,7 +7156,12 @@ pub struct Login {
     #[serde(rename = "preserveUrlFragmentsForLogins", default, skip_serializing_if = "Option::is_none")]
     pub preserve_url_fragments_for_logins: Option<bool>,
     #[doc = "External URLs that can be redirected to as part of logging in or logging out of the app. Note that the query string part of the URL is ignored.\nThis is an advanced setting typically only needed by Windows Store application backends.\nNote that URLs within the current domain are always implicitly allowed."]
-    #[serde(rename = "allowedExternalRedirectUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedExternalRedirectUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_external_redirect_urls: Vec<String>,
     #[doc = "The configuration settings of the session cookie's expiration."]
     #[serde(rename = "cookieExpiration", default, skip_serializing_if = "Option::is_none")]
@@ -6761,7 +7191,11 @@ impl LoginRoutes {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoginScopes {
     #[doc = "A list of the scopes that should be requested while authenticating."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl LoginScopes {
@@ -6833,7 +7267,11 @@ pub mod ms_deploy_log {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "List of log entry messages"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub entries: Vec<MsDeployLogEntry>,
     }
     impl Properties {
@@ -7001,15 +7439,33 @@ pub struct MetricSpecification {
     pub fill_gap_with_zero: Option<bool>,
     #[serde(rename = "isInternal", default, skip_serializing_if = "Option::is_none")]
     pub is_internal: Option<bool>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<MetricAvailability>,
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
 }
 impl MetricSpecification {
@@ -7181,10 +7637,20 @@ pub mod network_features {
         #[serde(rename = "virtualNetworkConnection", default, skip_serializing_if = "Option::is_none")]
         pub virtual_network_connection: Option<VnetInfo>,
         #[doc = "The Hybrid Connections summary view."]
-        #[serde(rename = "hybridConnections", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hybridConnections",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub hybrid_connections: Vec<RelayServiceConnectionEntity>,
         #[doc = "The Hybrid Connection V2 (Service Bus) view."]
-        #[serde(rename = "hybridConnectionsV2", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hybridConnectionsV2",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub hybrid_connections_v2: Vec<HybridConnection>,
     }
     impl Properties {
@@ -7280,7 +7746,11 @@ pub struct OpenIdConnectLogin {
     #[serde(rename = "nameClaimType", default, skip_serializing_if = "Option::is_none")]
     pub name_claim_type: Option<String>,
     #[doc = "A list of the scopes that should be requested while authenticating."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl OpenIdConnectLogin {
@@ -7319,7 +7789,11 @@ pub struct Operation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<operation::Status>,
     #[doc = "Any errors associate with the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ErrorEntity>,
     #[doc = "Time when operation has started."]
     #[serde(rename = "createdTime", default, with = "azure_core::date::rfc3339::option")]
@@ -7358,7 +7832,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that the App Service Environment reaches the service at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -7458,7 +7936,11 @@ pub struct PerfMonSet {
     #[serde(rename = "timeGrain", default, skip_serializing_if = "Option::is_none")]
     pub time_grain: Option<String>,
     #[doc = "Collection of workers that are active during this time."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<PerfMonSample>,
 }
 impl PerfMonSet {
@@ -7663,7 +8145,12 @@ pub mod private_access {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<bool>,
         #[doc = "The Virtual Networks (and subnets) allowed to access the site privately."]
-        #[serde(rename = "virtualNetworks", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "virtualNetworks",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub virtual_networks: Vec<PrivateAccessVirtualNetwork>,
     }
     impl Properties {
@@ -7700,7 +8187,11 @@ pub struct PrivateAccessVirtualNetwork {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "A List of subnets that access is allowed to on this Virtual Network. An empty array (but not null) is interpreted to mean that all subnets are allowed within this Virtual Network."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<PrivateAccessSubnet>,
 }
 impl PrivateAccessVirtualNetwork {
@@ -7799,10 +8290,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "RequiredMembers of a private link resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "RequiredZoneNames of a private link resource"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -7864,16 +8365,32 @@ pub mod process_info {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub parent: Option<String>,
         #[doc = "Child process list."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub children: Vec<String>,
         #[doc = "Thread list."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub threads: Vec<ProcessThreadInfo>,
         #[doc = "List of open files."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub open_file_handles: Vec<String>,
         #[doc = "List of modules."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub modules: Vec<ProcessModuleInfo>,
         #[doc = "File name of this process."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -8306,7 +8823,11 @@ pub struct QueryUtterancesResults {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub query: Option<String>,
     #[doc = "Array of utterance results for search query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub results: Vec<QueryUtterancesResult>,
 }
 impl QueryUtterancesResults {
@@ -8324,7 +8845,11 @@ pub struct QueueScaleRule {
     #[serde(rename = "queueLength", default, skip_serializing_if = "Option::is_none")]
     pub queue_length: Option<i32>,
     #[doc = "Authentication secrets for the queue scale rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auth: Vec<ScaleRuleAuth>,
 }
 impl QueueScaleRule {
@@ -8412,7 +8937,12 @@ pub mod recommendation {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub channels: Option<properties::Channels>,
         #[doc = "The list of category tags that this recommendation belongs to."]
-        #[serde(rename = "categoryTags", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "categoryTags",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub category_tags: Vec<String>,
         #[doc = "Name of action recommended by this object."]
         #[serde(rename = "actionName", default, skip_serializing_if = "Option::is_none")]
@@ -8421,7 +8951,11 @@ pub mod recommendation {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<i32>,
         #[doc = "The list of states of this recommendation. If it's null then it should be considered \"Active\"."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub states: Vec<String>,
         #[doc = "The beginning time in UTC of a range that the recommendation refers to."]
         #[serde(rename = "startTime", default, with = "azure_core::date::rfc3339::option")]
@@ -8583,7 +9117,12 @@ pub mod recommendation_rule {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub channels: Option<properties::Channels>,
         #[doc = "The list of category tags that this recommendation rule belongs to."]
-        #[serde(rename = "categoryTags", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "categoryTags",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub category_tags: Vec<String>,
         #[doc = "True if this is associated with a dynamically added rule"]
         #[serde(rename = "isDynamic", default, skip_serializing_if = "Option::is_none")]
@@ -8748,7 +9287,12 @@ pub mod remote_private_endpoint_connection {
         #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
         pub private_link_service_connection_state: Option<PrivateLinkConnectionState>,
         #[doc = "Private IPAddresses mapped to the remote private endpoint"]
-        #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_addresses: Vec<String>,
     }
     impl Properties {
@@ -8785,7 +9329,12 @@ pub mod remote_private_endpoint_connection_arm_resource {
         #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
         pub private_link_service_connection_state: Option<PrivateLinkConnectionState>,
         #[doc = "Private IPAddresses mapped to the remote private endpoint"]
-        #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_addresses: Vec<String>,
     }
     impl Properties {
@@ -9040,7 +9589,12 @@ pub mod resource_metric_definition {
         #[serde(rename = "primaryAggregationType", default, skip_serializing_if = "Option::is_none")]
         pub primary_aggregation_type: Option<String>,
         #[doc = "List of time grains supported for the metric together with retention period."]
-        #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "metricAvailabilities",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub metric_availabilities: Vec<ResourceMetricAvailability>,
         #[doc = "Resource URI."]
         #[serde(rename = "resourceUri", default, skip_serializing_if = "Option::is_none")]
@@ -9249,7 +9803,11 @@ pub struct ResponseMessageEnvelopeRemotePrivateEndpointConnection {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<ManagedServiceIdentity>,
     #[doc = "Logical Availability Zones the service is hosted in"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResponseMessageEnvelopeRemotePrivateEndpointConnection {
@@ -9299,7 +9857,11 @@ pub mod restore_request {
         #[serde(rename = "siteName", default, skip_serializing_if = "Option::is_none")]
         pub site_name: Option<String>,
         #[doc = "Collection of databases which should be restored. This list has to match the list of databases included in the backup."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub databases: Vec<DatabaseBackupSetting>,
         #[doc = "Changes a logic when restoring an app with custom domains. <code>true</code> to remove custom domains automatically. If <code>false</code>, custom domains are added to \nthe app's object when it is being restored, but that might fail due to conflicts during the operation."]
         #[serde(rename = "ignoreConflictingHostNames", default, skip_serializing_if = "Option::is_none")]
@@ -9524,7 +10086,11 @@ pub struct SampleUtterance {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub text: Option<String>,
     #[doc = "Links attribute of sample utterance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<String>,
     #[doc = "Question id of sample utterance (for stackoverflow questions titles)."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -9545,7 +10111,11 @@ pub struct Scale {
     #[serde(rename = "maxReplicas", default, skip_serializing_if = "Option::is_none")]
     pub max_replicas: Option<i32>,
     #[doc = "Scaling rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ScaleRule>,
 }
 impl Scale {
@@ -9618,9 +10188,19 @@ impl SecretsCollection {
 #[doc = "Resource metrics service provided by Microsoft.Insights resource provider."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -9662,7 +10242,12 @@ pub mod site {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub state: Option<String>,
         #[doc = "Hostnames associated with the app."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Name of the repository site."]
         #[serde(rename = "repositorySiteName", default, skip_serializing_if = "Option::is_none")]
@@ -9674,13 +10259,23 @@ pub mod site {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<bool>,
         #[doc = "Enabled hostnames for the app.Hostnames need to be assigned (see HostNames) AND enabled. Otherwise,\nthe app is not served on those hostnames."]
-        #[serde(rename = "enabledHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "enabledHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub enabled_host_names: Vec<String>,
         #[doc = "Management information availability state for the app."]
         #[serde(rename = "availabilityState", default, skip_serializing_if = "Option::is_none")]
         pub availability_state: Option<properties::AvailabilityState>,
         #[doc = "Hostname SSL states are used to manage the SSL bindings for app's hostnames."]
-        #[serde(rename = "hostNameSslStates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNameSslStates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_name_ssl_states: Vec<HostNameSslState>,
         #[doc = "Resource ID of the associated App Service plan, formatted as: \"/subscriptions/{subscriptionID}/resourceGroups/{groupName}/providers/Microsoft.Web/serverfarms/{appServicePlanName}\"."]
         #[serde(rename = "serverFarmId", default, skip_serializing_if = "Option::is_none")]
@@ -9701,7 +10296,12 @@ pub mod site {
         #[serde(rename = "siteConfig", default, skip_serializing_if = "Option::is_none")]
         pub site_config: Option<SiteConfig>,
         #[doc = "Azure Traffic Manager hostnames associated with the app. Read-only."]
-        #[serde(rename = "trafficManagerHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "trafficManagerHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub traffic_manager_host_names: Vec<String>,
         #[doc = "<code>true</code> to stop SCM (KUDU) site when the app is stopped; otherwise, <code>false</code>. The default is <code>false</code>."]
         #[serde(rename = "scmSiteAlsoStopped", default, skip_serializing_if = "Option::is_none")]
@@ -9852,7 +10452,12 @@ pub mod site_auth_settings {
         #[serde(rename = "tokenStoreEnabled", default, skip_serializing_if = "Option::is_none")]
         pub token_store_enabled: Option<bool>,
         #[doc = "External URLs that can be redirected to as part of logging in or logging out of the app. Note that the query string part of the URL is ignored.\nThis is an advanced setting typically only needed by Windows Store application backends.\nNote that URLs within the current domain are always implicitly allowed."]
-        #[serde(rename = "allowedExternalRedirectUrls", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "allowedExternalRedirectUrls",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub allowed_external_redirect_urls: Vec<String>,
         #[doc = "The default authentication provider to use when multiple providers are configured.\nThis setting is only needed if multiple providers are configured and the unauthenticated client\naction is set to \"RedirectToLoginPage\"."]
         #[serde(rename = "defaultProvider", default, skip_serializing_if = "Option::is_none")]
@@ -9879,10 +10484,20 @@ pub mod site_auth_settings {
         #[serde(rename = "validateIssuer", default, skip_serializing_if = "Option::is_none")]
         pub validate_issuer: Option<bool>,
         #[doc = "Allowed audience values to consider when validating JWTs issued by \nAzure Active Directory. Note that the <code>ClientID</code> value is always considered an\nallowed audience, regardless of this setting."]
-        #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "allowedAudiences",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub allowed_audiences: Vec<String>,
         #[doc = "Login parameters to send to the OpenID Connect authorization endpoint when\na user logs in. Each parameter must be in the form \"key=value\"."]
-        #[serde(rename = "additionalLoginParams", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalLoginParams",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_login_params: Vec<String>,
         #[doc = "Gets a JSON string containing the Azure AD Acl settings."]
         #[serde(rename = "aadClaimsAuthorization", default, skip_serializing_if = "Option::is_none")]
@@ -9897,7 +10512,12 @@ pub mod site_auth_settings {
         #[serde(rename = "googleClientSecretSettingName", default, skip_serializing_if = "Option::is_none")]
         pub google_client_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of Google Sign-In authentication.\nThis setting is optional. If not specified, \"openid\", \"profile\", and \"email\" are used as default scopes.\nGoogle Sign-In documentation: https://developers.google.com/identity/sign-in/web/"]
-        #[serde(rename = "googleOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "googleOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub google_o_auth_scopes: Vec<String>,
         #[doc = "The App ID of the Facebook app used for login.\nThis setting is required for enabling Facebook Login.\nFacebook Login documentation: https://developers.facebook.com/docs/facebook-login"]
         #[serde(rename = "facebookAppId", default, skip_serializing_if = "Option::is_none")]
@@ -9909,7 +10529,12 @@ pub mod site_auth_settings {
         #[serde(rename = "facebookAppSecretSettingName", default, skip_serializing_if = "Option::is_none")]
         pub facebook_app_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of Facebook Login authentication.\nThis setting is optional.\nFacebook Login documentation: https://developers.facebook.com/docs/facebook-login"]
-        #[serde(rename = "facebookOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "facebookOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub facebook_o_auth_scopes: Vec<String>,
         #[doc = "The Client Id of the GitHub app used for login.\nThis setting is required for enabling Github login"]
         #[serde(rename = "gitHubClientId", default, skip_serializing_if = "Option::is_none")]
@@ -9921,7 +10546,12 @@ pub mod site_auth_settings {
         #[serde(rename = "gitHubClientSecretSettingName", default, skip_serializing_if = "Option::is_none")]
         pub git_hub_client_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of GitHub Login authentication.\nThis setting is optional"]
-        #[serde(rename = "gitHubOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "gitHubOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub git_hub_o_auth_scopes: Vec<String>,
         #[doc = "The OAuth 1.0a consumer key of the Twitter application used for sign-in.\nThis setting is required for enabling Twitter Sign-In.\nTwitter Sign-In documentation: https://dev.twitter.com/web/sign-in"]
         #[serde(rename = "twitterConsumerKey", default, skip_serializing_if = "Option::is_none")]
@@ -9946,7 +10576,12 @@ pub mod site_auth_settings {
         )]
         pub microsoft_account_client_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of Microsoft Account authentication.\nThis setting is optional. If not specified, \"wl.basic\" is used as the default scope.\nMicrosoft Account Scopes and permissions documentation: https://msdn.microsoft.com/en-us/library/dn631845.aspx"]
-        #[serde(rename = "microsoftAccountOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "microsoftAccountOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub microsoft_account_o_auth_scopes: Vec<String>,
         #[doc = "\"true\" if the auth config settings should be read from a file,\n\"false\" otherwise"]
         #[serde(rename = "isAuthFromFile", default, skip_serializing_if = "Option::is_none")]
@@ -10031,13 +10666,28 @@ pub struct SiteCloneability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub result: Option<site_cloneability::Result>,
     #[doc = "List of features enabled on app that prevent cloning."]
-    #[serde(rename = "blockingFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockingFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocking_features: Vec<SiteCloneabilityCriterion>,
     #[doc = "List of features enabled on app that are non-blocking but cannot be cloned. The app can still be cloned\nbut the features in this list will not be set up on cloned app."]
-    #[serde(rename = "unsupportedFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "unsupportedFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unsupported_features: Vec<SiteCloneabilityCriterion>,
     #[doc = "List of blocking application characteristics."]
-    #[serde(rename = "blockingCharacteristics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockingCharacteristics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocking_characteristics: Vec<SiteCloneabilityCriterion>,
 }
 impl SiteCloneability {
@@ -10077,7 +10727,12 @@ pub struct SiteConfig {
     #[serde(rename = "numberOfWorkers", default, skip_serializing_if = "Option::is_none")]
     pub number_of_workers: Option<i32>,
     #[doc = "Default documents."]
-    #[serde(rename = "defaultDocuments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultDocuments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_documents: Vec<String>,
     #[doc = ".NET Framework version."]
     #[serde(rename = "netFrameworkVersion", default, skip_serializing_if = "Option::is_none")]
@@ -10131,16 +10786,31 @@ pub struct SiteConfig {
     #[serde(rename = "publishingUsername", default, skip_serializing_if = "Option::is_none")]
     pub publishing_username: Option<String>,
     #[doc = "Application settings."]
-    #[serde(rename = "appSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_settings: Vec<NameValuePair>,
     #[doc = "Connection strings."]
-    #[serde(rename = "connectionStrings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionStrings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_strings: Vec<ConnStringInfo>,
     #[doc = "MachineKey of an app."]
     #[serde(rename = "machineKey", default, skip_serializing_if = "Option::is_none")]
     pub machine_key: Option<SiteMachineKey>,
     #[doc = "Handler mappings."]
-    #[serde(rename = "handlerMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "handlerMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub handler_mappings: Vec<HandlerMapping>,
     #[doc = "Document root."]
     #[serde(rename = "documentRoot", default, skip_serializing_if = "Option::is_none")]
@@ -10173,7 +10843,12 @@ pub struct SiteConfig {
     #[serde(rename = "managedPipelineMode", default, skip_serializing_if = "Option::is_none")]
     pub managed_pipeline_mode: Option<site_config::ManagedPipelineMode>,
     #[doc = "Virtual applications."]
-    #[serde(rename = "virtualApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_applications: Vec<VirtualApplication>,
     #[doc = "Site load balancing."]
     #[serde(rename = "loadBalancing", default, skip_serializing_if = "Option::is_none")]
@@ -10230,10 +10905,20 @@ pub struct SiteConfig {
     #[serde(rename = "keyVaultReferenceIdentity", default, skip_serializing_if = "Option::is_none")]
     pub key_vault_reference_identity: Option<String>,
     #[doc = "IP security restrictions for main."]
-    #[serde(rename = "ipSecurityRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipSecurityRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_security_restrictions: Vec<IpSecurityRestriction>,
     #[doc = "IP security restrictions for scm."]
-    #[serde(rename = "scmIpSecurityRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scmIpSecurityRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scm_ip_security_restrictions: Vec<IpSecurityRestriction>,
     #[doc = "IP security restrictions for scm to use main."]
     #[serde(rename = "scmIpSecurityRestrictionsUseMain", default, skip_serializing_if = "Option::is_none")]
@@ -10648,7 +11333,11 @@ pub mod site_extension_info {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub feed_url: Option<String>,
         #[doc = "List of authors."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub authors: Vec<String>,
         #[doc = "Installer command line parameters."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10813,7 +11502,12 @@ pub mod site_patch_resource {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub state: Option<String>,
         #[doc = "Hostnames associated with the app."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Name of the repository site."]
         #[serde(rename = "repositorySiteName", default, skip_serializing_if = "Option::is_none")]
@@ -10825,13 +11519,23 @@ pub mod site_patch_resource {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<bool>,
         #[doc = "Enabled hostnames for the app.Hostnames need to be assigned (see HostNames) AND enabled. Otherwise,\nthe app is not served on those hostnames."]
-        #[serde(rename = "enabledHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "enabledHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub enabled_host_names: Vec<String>,
         #[doc = "Management information availability state for the app."]
         #[serde(rename = "availabilityState", default, skip_serializing_if = "Option::is_none")]
         pub availability_state: Option<properties::AvailabilityState>,
         #[doc = "Hostname SSL states are used to manage the SSL bindings for app's hostnames."]
-        #[serde(rename = "hostNameSslStates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNameSslStates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_name_ssl_states: Vec<HostNameSslState>,
         #[doc = "Resource ID of the associated App Service plan, formatted as: \"/subscriptions/{subscriptionID}/resourceGroups/{groupName}/providers/Microsoft.Web/serverfarms/{appServicePlanName}\"."]
         #[serde(rename = "serverFarmId", default, skip_serializing_if = "Option::is_none")]
@@ -10852,7 +11556,12 @@ pub mod site_patch_resource {
         #[serde(rename = "siteConfig", default, skip_serializing_if = "Option::is_none")]
         pub site_config: Option<SiteConfig>,
         #[doc = "Azure Traffic Manager hostnames associated with the app. Read-only."]
-        #[serde(rename = "trafficManagerHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "trafficManagerHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub traffic_manager_host_names: Vec<String>,
         #[doc = "<code>true</code> to stop SCM (KUDU) site when the app is stopped; otherwise, <code>false</code>. The default is <code>false</code>."]
         #[serde(rename = "scmSiteAlsoStopped", default, skip_serializing_if = "Option::is_none")]
@@ -11128,10 +11837,18 @@ pub struct SkuDescription {
     #[serde(rename = "skuCapacity", default, skip_serializing_if = "Option::is_none")]
     pub sku_capacity: Option<SkuCapacity>,
     #[doc = "Locations of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Capabilities of the SKU, e.g., is traffic manager enabled?"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
 }
 impl SkuDescription {
@@ -11184,7 +11901,11 @@ pub struct SkuInfos {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "List of SKUs the subscription is able to use."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skus: Vec<GlobalCsmSkuDescription>,
 }
 impl SkuInfos {
@@ -11196,13 +11917,28 @@ impl SkuInfos {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SlotConfigNames {
     #[doc = "List of connection string names."]
-    #[serde(rename = "connectionStringNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionStringNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_string_names: Vec<String>,
     #[doc = "List of application settings names."]
-    #[serde(rename = "appSettingNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appSettingNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_setting_names: Vec<String>,
     #[doc = "List of external Azure storage account identifiers."]
-    #[serde(rename = "azureStorageConfigNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureStorageConfigNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_storage_config_names: Vec<String>,
 }
 impl SlotConfigNames {
@@ -11463,10 +12199,18 @@ pub struct Solution {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<solution::Type>,
     #[doc = "Solution Data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<Vec<NameValuePair>>,
     #[doc = "Solution Metadata."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<Vec<NameValuePair>>,
 }
 impl Solution {
@@ -11555,7 +12299,12 @@ pub struct StackMajorVersion {
     #[serde(rename = "isDefault", default, skip_serializing_if = "Option::is_none")]
     pub is_default: Option<bool>,
     #[doc = "Minor versions associated with the major version."]
-    #[serde(rename = "minorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "minorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minor_versions: Vec<StackMinorVersion>,
     #[doc = "<code>true</code> if this supports Application Insights; otherwise, <code>false</code>."]
     #[serde(rename = "applicationInsights", default, skip_serializing_if = "Option::is_none")]
@@ -11703,7 +12452,12 @@ pub struct StaticSite {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub branch: Option<String>,
     #[doc = "The custom domains associated with this static site."]
-    #[serde(rename = "customDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_domains: Vec<String>,
     #[doc = "A user's github repository token. This is used to setup the Github Actions workflow file and API secrets."]
     #[serde(rename = "repositoryToken", default, skip_serializing_if = "Option::is_none")]
@@ -11712,7 +12466,12 @@ pub struct StaticSite {
     #[serde(rename = "buildProperties", default, skip_serializing_if = "Option::is_none")]
     pub build_properties: Option<StaticSiteBuildProperties>,
     #[doc = "Private endpoint connections"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ResponseMessageEnvelopeRemotePrivateEndpointConnection>,
     #[doc = "State indicating whether staging environments are allowed or not allowed for a static web app."]
     #[serde(rename = "stagingEnvironmentPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -11730,7 +12489,12 @@ pub struct StaticSite {
     #[serde(rename = "keyVaultReferenceIdentity", default, skip_serializing_if = "Option::is_none")]
     pub key_vault_reference_identity: Option<String>,
     #[doc = "User provided function apps registered with the static site"]
-    #[serde(rename = "userProvidedFunctionApps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userProvidedFunctionApps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_provided_function_apps: Vec<StaticSiteUserProvidedFunctionApp>,
     #[doc = "The provider that submitted the last deployment to the primary environment of the static site."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11860,7 +12624,12 @@ pub mod static_site_build_arm_resource {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub status: Option<properties::Status>,
         #[doc = "User provided function apps registered with the static site build"]
-        #[serde(rename = "userProvidedFunctionApps", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "userProvidedFunctionApps",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub user_provided_function_apps: Vec<StaticSiteUserProvidedFunctionApp>,
     }
     impl Properties {
@@ -12783,7 +13552,11 @@ pub struct StringList {
     #[serde(flatten)]
     pub proxy_only_resource: ProxyOnlyResource,
     #[doc = "List of string resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub properties: Vec<String>,
 }
 impl StringList {
@@ -12845,7 +13618,11 @@ pub struct Template {
     #[serde(rename = "revisionSuffix", default, skip_serializing_if = "Option::is_none")]
     pub revision_suffix: Option<String>,
     #[doc = "List of container definitions for the Container App."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub containers: Vec<Container>,
     #[doc = "Container App scaling configurations."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -13026,7 +13803,11 @@ pub mod triggered_job_history {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "List of triggered web job runs."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub runs: Vec<TriggeredJobRun>,
     }
     impl Properties {
@@ -13511,7 +14292,12 @@ pub struct VirtualApplication {
     #[serde(rename = "preloadEnabled", default, skip_serializing_if = "Option::is_none")]
     pub preload_enabled: Option<bool>,
     #[doc = "Virtual directories for virtual application."]
-    #[serde(rename = "virtualDirectories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualDirectories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_directories: Vec<VirtualDirectory>,
 }
 impl VirtualApplication {
@@ -13631,7 +14417,11 @@ pub struct VnetInfo {
     #[serde(rename = "certBlob", default, skip_serializing_if = "Option::is_none")]
     pub cert_blob: Option<String>,
     #[doc = "The routes that this Virtual Network connection uses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<VnetRoute>,
     #[doc = "<code>true</code> if a resync is required; otherwise, <code>false</code>."]
     #[serde(rename = "resyncRequired", default, skip_serializing_if = "Option::is_none")]
@@ -13806,10 +14596,19 @@ pub mod vnet_validation_failure_details {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub failed: Option<bool>,
         #[doc = "A list of tests that failed in the validation."]
-        #[serde(rename = "failedTests", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "failedTests",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub failed_tests: Vec<VnetValidationTestFailure>,
         #[doc = "A list of warnings generated during validation."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub warnings: Vec<VnetValidationTestFailure>,
     }
     impl Properties {
@@ -13900,7 +14699,12 @@ pub struct WebAppMajorVersion {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     #[doc = "Minor versions associated with the major version."]
-    #[serde(rename = "minorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "minorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minor_versions: Vec<WebAppMinorVersion>,
 }
 impl WebAppMajorVersion {
@@ -14015,7 +14819,12 @@ pub mod web_app_stack {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub value: Option<String>,
         #[doc = "List of major versions available."]
-        #[serde(rename = "majorVersions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "majorVersions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub major_versions: Vec<WebAppMajorVersion>,
         #[doc = "Web App stack preferred OS."]
         #[serde(rename = "preferredOs", default, skip_serializing_if = "Option::is_none")]
@@ -14234,7 +15043,12 @@ pub struct WorkerPool {
     #[serde(rename = "workerCount", default, skip_serializing_if = "Option::is_none")]
     pub worker_count: Option<i32>,
     #[doc = "Names of all instances in the worker pool (read only)."]
-    #[serde(rename = "instanceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "instanceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instance_names: Vec<String>,
 }
 impl WorkerPool {
diff --git a/services/mgmt/web/src/package_2022_03/models.rs b/services/mgmt/web/src/package_2022_03/models.rs
index db1fe4cf75..af3242eb18 100644
--- a/services/mgmt/web/src/package_2022_03/models.rs
+++ b/services/mgmt/web/src/package_2022_03/models.rs
@@ -13,10 +13,18 @@ pub struct AbnormalTimePeriod {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "List of Possible Cause of downtime"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<DetectorAbnormalTimePeriod>,
     #[doc = "List of proposed solutions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub solutions: Vec<Solution>,
 }
 impl AbnormalTimePeriod {
@@ -80,10 +88,20 @@ pub mod address_response {
         #[serde(rename = "internalIpAddress", default, skip_serializing_if = "Option::is_none")]
         pub internal_ip_address: Option<String>,
         #[doc = "IP addresses appearing on outbound connections."]
-        #[serde(rename = "outboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "outboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub outbound_ip_addresses: Vec<String>,
         #[doc = "Additional virtual IPs."]
-        #[serde(rename = "vipMappings", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "vipMappings",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub vip_mappings: Vec<VirtualIpMapping>,
     }
     impl Properties {
@@ -96,7 +114,12 @@ pub mod address_response {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedAudiencesValidation {
     #[doc = "The configuration settings of the allowed list of audiences from which to validate the JWT token."]
-    #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAudiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_audiences: Vec<String>,
 }
 impl AllowedAudiencesValidation {
@@ -108,10 +131,18 @@ impl AllowedAudiencesValidation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AllowedPrincipals {
     #[doc = "The list of the allowed groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub groups: Vec<String>,
     #[doc = "The list of the allowed identities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identities: Vec<String>,
 }
 impl AllowedPrincipals {
@@ -129,10 +160,18 @@ pub struct AnalysisData {
     #[serde(rename = "detectorDefinition", default, skip_serializing_if = "Option::is_none")]
     pub detector_definition: Option<DetectorDefinition>,
     #[doc = "Source Metrics"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metrics: Vec<DiagnosticMetricSet>,
     #[doc = "Additional Source Data"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<Vec<NameValuePair>>,
     #[serde(rename = "detectorMetaData", default, skip_serializing_if = "Option::is_none")]
     pub detector_meta_data: Option<ResponseMetaData>,
@@ -456,6 +495,7 @@ pub mod app_service_certificate_order {
         #[serde(
             rename = "appServiceCertificateNotRenewableReasons",
             default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
             skip_serializing_if = "Vec::is_empty"
         )]
         pub app_service_certificate_not_renewable_reasons: Vec<String>,
@@ -618,6 +658,7 @@ pub mod app_service_certificate_order_patch_resource {
         #[serde(
             rename = "appServiceCertificateNotRenewableReasons",
             default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
             skip_serializing_if = "Vec::is_empty"
         )]
         pub app_service_certificate_not_renewable_reasons: Vec<String>,
@@ -754,10 +795,20 @@ pub struct AppServiceEnvironment {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub suspended: Option<bool>,
     #[doc = "Custom settings for changing the behavior of the App Service Environment."]
-    #[serde(rename = "clusterSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clusterSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cluster_settings: Vec<NameValuePair>,
     #[doc = "User added ip ranges to whitelist on ASE db"]
-    #[serde(rename = "userWhitelistedIpRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userWhitelistedIpRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_whitelisted_ip_ranges: Vec<String>,
     #[doc = "Flag that displays whether an ASE has linux workers or not"]
     #[serde(rename = "hasLinuxWorkers", default, skip_serializing_if = "Option::is_none")]
@@ -1326,13 +1377,27 @@ pub struct ApplicationStack {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub dependency: Option<String>,
     #[doc = "List of major versions available."]
-    #[serde(rename = "majorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "majorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub major_versions: Vec<StackMajorVersion>,
     #[doc = "List of frameworks associated with application stack."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub frameworks: Vec<ApplicationStack>,
     #[doc = "<code>true</code> if this is the stack is deprecated; otherwise, <code>false</code>."]
-    #[serde(rename = "isDeprecated", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "isDeprecated",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub is_deprecated: Vec<ApplicationStack>,
 }
 impl ApplicationStack {
@@ -1495,13 +1560,33 @@ pub mod ase_v3_networking_configuration {
     #[doc = "AseV3NetworkingConfiguration resource specific properties"]
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
-        #[serde(rename = "windowsOutboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "windowsOutboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub windows_outbound_ip_addresses: Vec<String>,
-        #[serde(rename = "linuxOutboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "linuxOutboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub linux_outbound_ip_addresses: Vec<String>,
-        #[serde(rename = "externalInboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "externalInboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub external_inbound_ip_addresses: Vec<String>,
-        #[serde(rename = "internalInboundIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "internalInboundIpAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub internal_inbound_ip_addresses: Vec<String>,
         #[doc = "Property to enable and disable new private endpoint connection creation on ASE"]
         #[serde(rename = "allowNewPrivateEndpointConnections", default, skip_serializing_if = "Option::is_none")]
@@ -1608,16 +1693,31 @@ pub struct AutoHealTriggers {
     #[serde(rename = "privateBytesInKB", default, skip_serializing_if = "Option::is_none")]
     pub private_bytes_in_kb: Option<i32>,
     #[doc = "A rule based on status codes."]
-    #[serde(rename = "statusCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_codes: Vec<StatusCodesBasedTrigger>,
     #[doc = "Trigger based on request execution time."]
     #[serde(rename = "slowRequests", default, skip_serializing_if = "Option::is_none")]
     pub slow_requests: Option<SlowRequestsBasedTrigger>,
     #[doc = "A rule based on multiple Slow Requests Rule with path"]
-    #[serde(rename = "slowRequestsWithPath", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "slowRequestsWithPath",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub slow_requests_with_path: Vec<SlowRequestsBasedTrigger>,
     #[doc = "A rule based on status codes ranges."]
-    #[serde(rename = "statusCodesRange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statusCodesRange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub status_codes_range: Vec<StatusCodesRangeBasedTrigger>,
 }
 impl AutoHealTriggers {
@@ -1653,7 +1753,12 @@ impl AzureActiveDirectory {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureActiveDirectoryLogin {
     #[doc = "Login parameters to send to the OpenID Connect authorization endpoint when\na user logs in. Each parameter must be in the form \"key=value\"."]
-    #[serde(rename = "loginParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "loginParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub login_parameters: Vec<String>,
     #[doc = "<code>true</code> if the www-authenticate provider should be omitted from the request; otherwise, <code>false</code>."]
     #[serde(rename = "disableWWWAuthenticate", default, skip_serializing_if = "Option::is_none")]
@@ -1702,7 +1807,12 @@ pub struct AzureActiveDirectoryValidation {
     #[serde(rename = "jwtClaimChecks", default, skip_serializing_if = "Option::is_none")]
     pub jwt_claim_checks: Option<JwtClaimChecks>,
     #[doc = "The list of audiences that can make successful authentication/authorization requests."]
-    #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedAudiences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_audiences: Vec<String>,
     #[doc = "The configuration settings of the Azure Active Directory default authorization policy."]
     #[serde(rename = "defaultAuthorizationPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -1769,7 +1879,11 @@ pub struct AzureResourceErrorInfo {
     #[doc = "The error message."]
     pub message: String,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<AzureResourceErrorInfo>,
 }
 impl AzureResourceErrorInfo {
@@ -1937,7 +2051,11 @@ pub mod backup_item {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub log: Option<String>,
         #[doc = "List of databases included in the backup."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub databases: Vec<DatabaseBackupSetting>,
         #[doc = "True if this backup has been created due to a schedule being triggered."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2030,7 +2148,11 @@ pub mod backup_request {
         #[serde(rename = "backupSchedule", default, skip_serializing_if = "Option::is_none")]
         pub backup_schedule: Option<BackupSchedule>,
         #[doc = "Databases included in the backup."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub databases: Vec<DatabaseBackupSetting>,
     }
     impl Properties {
@@ -2227,7 +2349,12 @@ pub mod certificate {
         #[serde(rename = "subjectName", default, skip_serializing_if = "Option::is_none")]
         pub subject_name: Option<String>,
         #[doc = "Host names the certificate applies to."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Pfx blob."]
         #[serde(rename = "pfxBlob", default, skip_serializing_if = "Option::is_none")]
@@ -2457,7 +2584,12 @@ pub mod certificate_patch_resource {
         #[serde(rename = "subjectName", default, skip_serializing_if = "Option::is_none")]
         pub subject_name: Option<String>,
         #[doc = "Host names the certificate applies to."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Pfx blob."]
         #[serde(rename = "pfxBlob", default, skip_serializing_if = "Option::is_none")]
@@ -2608,7 +2740,11 @@ impl CloningInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Configuration {
     #[doc = "Collection of secrets used by a Container app"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secrets: Vec<Secret>,
     #[doc = "ActiveRevisionsMode controls how active revisions are handled for the Container app:\n<list><item>Multiple: multiple revisions can be active. If no value if provided, this is the default</item><item>Single: Only one revision can be active at a time. Revision weights can not be used in this mode</item></list>"]
     #[serde(rename = "activeRevisionsMode", default, skip_serializing_if = "Option::is_none")]
@@ -2617,7 +2753,11 @@ pub struct Configuration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub ingress: Option<Ingress>,
     #[doc = "Collection of private container registry credentials for containers used by the Container app"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub registries: Vec<RegistryCredentials>,
 }
 impl Configuration {
@@ -2809,13 +2949,25 @@ pub struct Container {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "Container start command."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub command: Vec<String>,
     #[doc = "Container start command arguments."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub args: Vec<String>,
     #[doc = "Container environment variables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub env: Vec<EnvironmentVar>,
     #[doc = "Container App container resource requirements."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2998,7 +3150,12 @@ impl ContainerCpuStatistics {
 pub struct ContainerCpuUsage {
     #[serde(rename = "totalUsage", default, skip_serializing_if = "Option::is_none")]
     pub total_usage: Option<i64>,
-    #[serde(rename = "perCpuUsage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "perCpuUsage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub per_cpu_usage: Vec<i64>,
     #[serde(rename = "kernelModeUsage", default, skip_serializing_if = "Option::is_none")]
     pub kernel_mode_usage: Option<i64>,
@@ -3273,7 +3430,12 @@ impl Correlation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CorsSettings {
     #[doc = "Gets or sets the list of origins that should be allowed to make cross-origin\ncalls (for example: http://example.com:12345). Use \"*\" to allow all."]
-    #[serde(rename = "allowedOrigins", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedOrigins",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_origins: Vec<String>,
     #[doc = "Gets or sets whether CORS requests with credentials are allowed. See \nhttps://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#Requests_with_credentials\nfor more details."]
     #[serde(rename = "supportCredentials", default, skip_serializing_if = "Option::is_none")]
@@ -3319,10 +3481,19 @@ pub mod csm_deployment_status {
         #[serde(rename = "numberOfInstancesFailed", default, skip_serializing_if = "Option::is_none")]
         pub number_of_instances_failed: Option<i32>,
         #[doc = "List of URLs pointing to logs for instances which failed to provision."]
-        #[serde(rename = "failedInstancesLogs", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "failedInstancesLogs",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub failed_instances_logs: Vec<String>,
         #[doc = "List of errors."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub errors: Vec<ErrorEntity>,
     }
     impl Properties {
@@ -3418,7 +3589,11 @@ impl CsmDeploymentStatusCollection {
 pub struct CsmMoveResourceEnvelope {
     #[serde(rename = "targetResourceGroup", default, skip_serializing_if = "Option::is_none")]
     pub target_resource_group: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
 }
 impl CsmMoveResourceEnvelope {
@@ -3730,19 +3905,44 @@ pub mod custom_hostname_analysis_result {
         #[serde(rename = "conflictingAppResourceId", default, skip_serializing_if = "Option::is_none")]
         pub conflicting_app_resource_id: Option<String>,
         #[doc = "CName records controller can see for this hostname."]
-        #[serde(rename = "cNameRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "cNameRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub c_name_records: Vec<String>,
         #[doc = "TXT records controller can see for this hostname."]
-        #[serde(rename = "txtRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "txtRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub txt_records: Vec<String>,
         #[doc = "A records controller can see for this hostname."]
-        #[serde(rename = "aRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "aRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub a_records: Vec<String>,
         #[doc = "Alternate CName records controller can see for this hostname."]
-        #[serde(rename = "alternateCNameRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "alternateCNameRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub alternate_c_name_records: Vec<String>,
         #[doc = "Alternate TXT records controller can see for this hostname."]
-        #[serde(rename = "alternateTxtRecords", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "alternateTxtRecords",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub alternate_txt_records: Vec<String>,
     }
     impl Properties {
@@ -3784,7 +3984,12 @@ pub mod custom_hostname_sites {
         pub custom_hostname: Option<String>,
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub region: Option<String>,
-        #[serde(rename = "siteResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "siteResourceIds",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub site_resource_ids: Vec<Identifier>,
     }
     impl Properties {
@@ -3841,7 +4046,11 @@ pub struct CustomScaleRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
     #[doc = "Authentication secrets for the custom scale rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auth: Vec<ScaleRuleAuth>,
 }
 impl CustomScaleRule {
@@ -3862,7 +4071,11 @@ pub struct Dapr {
     #[serde(rename = "appPort", default, skip_serializing_if = "Option::is_none")]
     pub app_port: Option<i32>,
     #[doc = "Collection of Dapr components"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub components: Vec<DaprComponent>,
 }
 impl Dapr {
@@ -3883,7 +4096,11 @@ pub struct DaprComponent {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "Component metadata"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<DaprMetadata>,
 }
 impl DaprComponent {
@@ -3915,7 +4132,12 @@ pub struct DataProviderMetadata {
     #[serde(rename = "providerName", default, skip_serializing_if = "Option::is_none")]
     pub provider_name: Option<String>,
     #[doc = "Settings for the data provider"]
-    #[serde(rename = "propertyBag", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "propertyBag",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub property_bag: Vec<KeyValuePairStringObject>,
 }
 impl DataProviderMetadata {
@@ -3927,10 +4149,19 @@ impl DataProviderMetadata {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataSource {
     #[doc = "Instructions if any for the data source"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instructions: Vec<String>,
     #[doc = "Datasource Uri Links"]
-    #[serde(rename = "dataSourceUri", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataSourceUri",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_source_uri: Vec<NameValuePair>,
 }
 impl DataSource {
@@ -3963,10 +4194,18 @@ pub struct DataTableResponseObject {
     #[serde(rename = "tableName", default, skip_serializing_if = "Option::is_none")]
     pub table_name: Option<String>,
     #[doc = "List of columns with data types"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<DataTableResponseColumn>,
     #[doc = "Raw row values"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rows: Vec<Vec<String>>,
 }
 impl DataTableResponseObject {
@@ -4061,7 +4300,12 @@ pub struct DefaultAuthorizationPolicy {
     #[serde(rename = "allowedPrincipals", default, skip_serializing_if = "Option::is_none")]
     pub allowed_principals: Option<AllowedPrincipals>,
     #[doc = "The configuration settings of the Azure Active Directory allowed applications."]
-    #[serde(rename = "allowedApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_applications: Vec<String>,
 }
 impl DefaultAuthorizationPolicy {
@@ -4101,7 +4345,11 @@ pub mod default_error_response {
         #[doc = "Detailed error description and debugging information."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub target: Option<String>,
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<serde_json::Value>,
         #[doc = "More information to debug error."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4298,13 +4546,27 @@ impl DeploymentCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeploymentLocations {
     #[doc = "Available regions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<GeoRegion>,
     #[doc = "Available App Service Environments with full descriptions of the environments."]
-    #[serde(rename = "hostingEnvironments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostingEnvironments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosting_environments: Vec<AppServiceEnvironment>,
     #[doc = "Available App Service Environments with basic information."]
-    #[serde(rename = "hostingEnvironmentDeploymentInfos", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hostingEnvironmentDeploymentInfos",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hosting_environment_deployment_infos: Vec<HostingEnvironmentDeploymentInfo>,
 }
 impl DeploymentLocations {
@@ -4331,13 +4593,22 @@ pub struct DetectorAbnormalTimePeriod {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub priority: Option<f64>,
     #[doc = "Downtime metadata"]
-    #[serde(rename = "metaData", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metaData",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meta_data: Vec<Vec<NameValuePair>>,
     #[doc = "Represents the type of the Detector"]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<detector_abnormal_time_period::Type>,
     #[doc = "List of proposed solutions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub solutions: Vec<Solution>,
 }
 impl DetectorAbnormalTimePeriod {
@@ -4414,10 +4685,20 @@ pub struct DetectorInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "List of Support Topics for which this detector is enabled."]
-    #[serde(rename = "supportTopicList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportTopicList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub support_topic_list: Vec<SupportTopic>,
     #[doc = "Analysis Types for which this detector should apply to."]
-    #[serde(rename = "analysisType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "analysisType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub analysis_type: Vec<String>,
     #[doc = "Whether this detector is an Analysis Detector or not."]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
@@ -4464,13 +4745,22 @@ pub mod detector_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub metadata: Option<DetectorInfo>,
         #[doc = "Data Set"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub dataset: Vec<DiagnosticData>,
         #[doc = "Identify the status of the most severe insight generated by the detector."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub status: Option<Status>,
         #[doc = "Additional configuration for different data providers to be used by the UI"]
-        #[serde(rename = "dataProvidersMetadata", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "dataProvidersMetadata",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub data_providers_metadata: Vec<DataProviderMetadata>,
         #[doc = "Suggested utterances where the detector can be applicable"]
         #[serde(rename = "suggestedUtterances", default, skip_serializing_if = "Option::is_none")]
@@ -4528,13 +4818,27 @@ pub mod diagnostic_analysis {
         #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
         pub end_time: Option<time::OffsetDateTime>,
         #[doc = "List of time periods."]
-        #[serde(rename = "abnormalTimePeriods", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "abnormalTimePeriods",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub abnormal_time_periods: Vec<AbnormalTimePeriod>,
         #[doc = "Data by each detector"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub payload: Vec<AnalysisData>,
         #[doc = "Data by each detector for detectors that did not corelate"]
-        #[serde(rename = "nonCorrelatedDetectors", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "nonCorrelatedDetectors",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub non_correlated_detectors: Vec<DetectorDefinition>,
     }
     impl Properties {
@@ -4679,13 +4983,26 @@ pub mod diagnostic_detector_response {
         #[serde(rename = "detectorDefinition", default, skip_serializing_if = "Option::is_none")]
         pub detector_definition: Option<DetectorDefinition>,
         #[doc = "Metrics provided by the detector"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub metrics: Vec<DiagnosticMetricSet>,
         #[doc = "List of Correlated events found by the detector"]
-        #[serde(rename = "abnormalTimePeriods", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "abnormalTimePeriods",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub abnormal_time_periods: Vec<DetectorAbnormalTimePeriod>,
         #[doc = "Additional Data that detector wants to send."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub data: Vec<Vec<NameValuePair>>,
         #[serde(rename = "responseMetaData", default, skip_serializing_if = "Option::is_none")]
         pub response_meta_data: Option<ResponseMetaData>,
@@ -4742,7 +5059,11 @@ pub struct DiagnosticMetricSet {
     #[serde(rename = "timeGrain", default, skip_serializing_if = "Option::is_none")]
     pub time_grain: Option<String>,
     #[doc = "Collection of metric values for the selected period based on the {Microsoft.Web.Hosting.Administration.DiagnosticMetricSet.TimeGrain}"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<DiagnosticMetricSample>,
 }
 impl DiagnosticMetricSet {
@@ -4808,7 +5129,12 @@ pub mod domain {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<properties::ProvisioningState>,
         #[doc = "Name servers."]
-        #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "nameServers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub name_servers: Vec<String>,
         #[doc = "<code>true</code> if domain privacy is enabled for this domain; otherwise, <code>false</code>."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -4829,12 +5155,22 @@ pub mod domain {
         #[serde(rename = "readyForDnsRecordManagement", default, skip_serializing_if = "Option::is_none")]
         pub ready_for_dns_record_management: Option<bool>,
         #[doc = "All hostnames derived from the domain and assigned to Azure resources."]
-        #[serde(rename = "managedHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "managedHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub managed_host_names: Vec<HostName>,
         #[doc = "Domain purchase consent object, representing acceptance of applicable legal agreements."]
         pub consent: DomainPurchaseConsent,
         #[doc = "Reasons why domain is not renewable."]
-        #[serde(rename = "domainNotRenewableReasons", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "domainNotRenewableReasons",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub domain_not_renewable_reasons: Vec<String>,
         #[doc = "Current DNS type"]
         #[serde(rename = "dnsType", default, skip_serializing_if = "Option::is_none")]
@@ -5082,7 +5418,12 @@ pub mod domain_patch_resource {
         #[serde(rename = "provisioningState", default, skip_serializing_if = "Option::is_none")]
         pub provisioning_state: Option<properties::ProvisioningState>,
         #[doc = "Name servers."]
-        #[serde(rename = "nameServers", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "nameServers",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub name_servers: Vec<String>,
         #[doc = "<code>true</code> if domain privacy is enabled for this domain; otherwise, <code>false</code>."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5103,12 +5444,22 @@ pub mod domain_patch_resource {
         #[serde(rename = "readyForDnsRecordManagement", default, skip_serializing_if = "Option::is_none")]
         pub ready_for_dns_record_management: Option<bool>,
         #[doc = "All hostnames derived from the domain and assigned to Azure resources."]
-        #[serde(rename = "managedHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "managedHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub managed_host_names: Vec<HostName>,
         #[doc = "Domain purchase consent object, representing acceptance of applicable legal agreements."]
         pub consent: DomainPurchaseConsent,
         #[doc = "Reasons why domain is not renewable."]
-        #[serde(rename = "domainNotRenewableReasons", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "domainNotRenewableReasons",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub domain_not_renewable_reasons: Vec<String>,
         #[doc = "Current DNS type"]
         #[serde(rename = "dnsType", default, skip_serializing_if = "Option::is_none")]
@@ -5208,7 +5559,12 @@ pub mod domain_patch_resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainPurchaseConsent {
     #[doc = "List of applicable legal agreement keys. This list can be retrieved using ListLegalAgreements API under <code>TopLevelDomain</code> resource."]
-    #[serde(rename = "agreementKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "agreementKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub agreement_keys: Vec<String>,
     #[doc = "Client IP address."]
     #[serde(rename = "agreedBy", default, skip_serializing_if = "Option::is_none")]
@@ -5256,7 +5612,12 @@ pub struct EndpointDependency {
     #[serde(rename = "domainName", default, skip_serializing_if = "Option::is_none")]
     pub domain_name: Option<String>,
     #[doc = "The IP Addresses and Ports used when connecting to DomainName."]
-    #[serde(rename = "endpointDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_details: Vec<EndpointDetail>,
 }
 impl EndpointDependency {
@@ -5313,13 +5674,26 @@ pub struct ErrorEntity {
     #[serde(rename = "messageTemplate", default, skip_serializing_if = "Option::is_none")]
     pub message_template: Option<String>,
     #[doc = "Parameters for the template."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<String>,
     #[doc = "Inner errors."]
-    #[serde(rename = "innerErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "innerErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inner_errors: Vec<ErrorEntity>,
     #[doc = "Error Details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorEntity>,
     #[doc = "The error target."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5384,7 +5758,12 @@ impl ErrorResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Experiments {
     #[doc = "List of ramp-up rules."]
-    #[serde(rename = "rampUpRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "rampUpRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ramp_up_rules: Vec<RampUpRule>,
 }
 impl Experiments {
@@ -5401,7 +5780,11 @@ pub struct Expression {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<serde_json::Value>,
     #[doc = "The sub expressions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subexpressions: Vec<Expression>,
     #[doc = "The azure resource error info."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -5431,7 +5814,11 @@ impl ExpressionRoot {
 pub struct ExpressionTraces {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inputs: Vec<ExpressionRoot>,
     #[doc = "The link used to get the next page of recommendations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -5568,7 +5955,12 @@ impl FlowAccessControlConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FlowAccessControlConfigurationPolicy {
     #[doc = "The allowed caller IP address ranges."]
-    #[serde(rename = "allowedCallerIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedCallerIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_caller_ip_addresses: Vec<IpAddressRange>,
     #[doc = "AuthenticationPolicy of type Open."]
     #[serde(rename = "openAuthenticationPolicies", default, skip_serializing_if = "Option::is_none")]
@@ -5583,10 +5975,20 @@ impl FlowAccessControlConfigurationPolicy {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FlowEndpoints {
     #[doc = "The outgoing ip address."]
-    #[serde(rename = "outgoingIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outgoingIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outgoing_ip_addresses: Vec<IpAddress>,
     #[doc = "The access endpoint ip address."]
-    #[serde(rename = "accessEndpointIpAddresses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessEndpointIpAddresses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_endpoint_ip_addresses: Vec<IpAddress>,
 }
 impl FlowEndpoints {
@@ -5665,7 +6067,12 @@ pub struct FunctionAppMajorVersion {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     #[doc = "Minor versions associated with the major version."]
-    #[serde(rename = "minorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "minorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minor_versions: Vec<FunctionAppMinorVersion>,
 }
 impl FunctionAppMajorVersion {
@@ -5713,7 +6120,12 @@ pub struct FunctionAppRuntimeSettings {
     #[serde(rename = "siteConfigPropertiesDictionary", default, skip_serializing_if = "Option::is_none")]
     pub site_config_properties_dictionary: Option<SiteConfigPropertiesDictionary>,
     #[doc = "List of supported Functions extension versions."]
-    #[serde(rename = "supportedFunctionsExtensionVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedFunctionsExtensionVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_functions_extension_versions: Vec<String>,
     #[doc = "<code>true</code> if the stack is in preview; otherwise, <code>false</code>."]
     #[serde(rename = "isPreview", default, skip_serializing_if = "Option::is_none")]
@@ -5786,7 +6198,12 @@ pub mod function_app_stack {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub value: Option<String>,
         #[doc = "List of major versions available."]
-        #[serde(rename = "majorVersions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "majorVersions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub major_versions: Vec<FunctionAppMajorVersion>,
         #[doc = "Function App stack preferred OS."]
         #[serde(rename = "preferredOs", default, skip_serializing_if = "Option::is_none")]
@@ -6091,10 +6508,18 @@ pub struct GlobalCsmSkuDescription {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<SkuCapacity>,
     #[doc = "Locations of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Capabilities of the SKU, e.g., is traffic manager enabled?"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
 }
 impl GlobalCsmSkuDescription {
@@ -6115,7 +6540,12 @@ pub struct GlobalValidation {
     #[serde(rename = "redirectToProvider", default, skip_serializing_if = "Option::is_none")]
     pub redirect_to_provider: Option<String>,
     #[doc = "The paths for which unauthenticated flow would not be redirected to the login page."]
-    #[serde(rename = "excludedPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_paths: Vec<String>,
 }
 impl GlobalValidation {
@@ -6198,7 +6628,12 @@ pub struct HostName {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of apps the hostname is assigned to. This list will have more than one app only if the hostname is pointing to a Traffic Manager."]
-    #[serde(rename = "siteNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "siteNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub site_names: Vec<String>,
     #[doc = "Name of the Azure resource the hostname is assigned to. If it is assigned to a Traffic Manager then it will be the Traffic Manager name otherwise it will be the app name."]
     #[serde(rename = "azureResourceName", default, skip_serializing_if = "Option::is_none")]
@@ -6453,7 +6888,11 @@ pub struct HttpScaleRule {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
     #[doc = "Authentication secrets for the custom scale rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auth: Vec<ScaleRuleAuth>,
 }
 impl HttpScaleRule {
@@ -6717,10 +7156,18 @@ pub struct InboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The IP addresses that network traffic will originate from in cidr notation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<String>,
     #[doc = "The ports that network traffic will arrive to the App Service Environment at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ports: Vec<String>,
 }
 impl InboundEnvironmentEndpoint {
@@ -6763,7 +7210,11 @@ pub struct Ingress {
     #[doc = "Ingress transport protocol"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub transport: Option<ingress::Transport>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traffic: Vec<TrafficWeight>,
     #[doc = "Bool indicating if HTTP connections to is allowed. If set to false HTTP connections are automatically redirected to HTTPS connections"]
     #[serde(rename = "allowInsecure", default, skip_serializing_if = "Option::is_none")]
@@ -6946,10 +7397,20 @@ impl JsonSchema {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JwtClaimChecks {
     #[doc = "The list of the allowed groups."]
-    #[serde(rename = "allowedGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_groups: Vec<String>,
     #[doc = "The list of the allowed client applications."]
-    #[serde(rename = "allowedClientApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedClientApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_client_applications: Vec<String>,
 }
 impl JwtClaimChecks {
@@ -7351,7 +7812,12 @@ pub struct Login {
     #[serde(rename = "preserveUrlFragmentsForLogins", default, skip_serializing_if = "Option::is_none")]
     pub preserve_url_fragments_for_logins: Option<bool>,
     #[doc = "External URLs that can be redirected to as part of logging in or logging out of the app. Note that the query string part of the URL is ignored.\nThis is an advanced setting typically only needed by Windows Store application backends.\nNote that URLs within the current domain are always implicitly allowed."]
-    #[serde(rename = "allowedExternalRedirectUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedExternalRedirectUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_external_redirect_urls: Vec<String>,
     #[doc = "The configuration settings of the session cookie's expiration."]
     #[serde(rename = "cookieExpiration", default, skip_serializing_if = "Option::is_none")]
@@ -7381,7 +7847,11 @@ impl LoginRoutes {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LoginScopes {
     #[doc = "A list of the scopes that should be requested while authenticating."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl LoginScopes {
@@ -7453,7 +7923,11 @@ pub mod ms_deploy_log {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "List of log entry messages"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub entries: Vec<MsDeployLogEntry>,
     }
     impl Properties {
@@ -7621,15 +8095,33 @@ pub struct MetricSpecification {
     pub fill_gap_with_zero: Option<bool>,
     #[serde(rename = "isInternal", default, skip_serializing_if = "Option::is_none")]
     pub is_internal: Option<bool>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<MetricAvailability>,
-    #[serde(rename = "supportedTimeGrainTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedTimeGrainTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_time_grain_types: Vec<String>,
-    #[serde(rename = "supportedAggregationTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedAggregationTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_aggregation_types: Vec<String>,
 }
 impl MetricSpecification {
@@ -7801,10 +8293,20 @@ pub mod network_features {
         #[serde(rename = "virtualNetworkConnection", default, skip_serializing_if = "Option::is_none")]
         pub virtual_network_connection: Option<VnetInfo>,
         #[doc = "The Hybrid Connections summary view."]
-        #[serde(rename = "hybridConnections", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hybridConnections",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub hybrid_connections: Vec<RelayServiceConnectionEntity>,
         #[doc = "The Hybrid Connection V2 (Service Bus) view."]
-        #[serde(rename = "hybridConnectionsV2", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hybridConnectionsV2",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub hybrid_connections_v2: Vec<HybridConnection>,
     }
     impl Properties {
@@ -7872,7 +8374,11 @@ pub struct OpenAuthenticationAccessPolicy {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<OpenAuthenticationProviderType>,
     #[doc = "The access policy claims."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub claims: Vec<OpenAuthenticationPolicyClaim>,
 }
 impl OpenAuthenticationAccessPolicy {
@@ -7985,7 +8491,11 @@ pub struct OpenIdConnectLogin {
     #[serde(rename = "nameClaimType", default, skip_serializing_if = "Option::is_none")]
     pub name_claim_type: Option<String>,
     #[doc = "A list of the scopes that should be requested while authenticating."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
 }
 impl OpenIdConnectLogin {
@@ -8024,7 +8534,11 @@ pub struct Operation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<operation::Status>,
     #[doc = "Any errors associate with the operation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ErrorEntity>,
     #[doc = "Time when operation has started."]
     #[serde(rename = "createdTime", default, with = "azure_core::date::rfc3339::option")]
@@ -8077,7 +8591,12 @@ pub struct OperationResult {
     #[serde(rename = "trackedProperties", default, skip_serializing_if = "Option::is_none")]
     pub tracked_properties: Option<Object>,
     #[doc = "Gets the retry histories."]
-    #[serde(rename = "retryHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retryHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retry_history: Vec<RetryHistory>,
     #[serde(rename = "iterationCount", default, skip_serializing_if = "Option::is_none")]
     pub iteration_count: Option<i32>,
@@ -8120,7 +8639,11 @@ pub struct OutboundEnvironmentEndpoint {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The endpoints that the App Service Environment reaches the service at."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointDependency>,
 }
 impl OutboundEnvironmentEndpoint {
@@ -8271,7 +8794,11 @@ pub struct PerfMonSet {
     #[serde(rename = "timeGrain", default, skip_serializing_if = "Option::is_none")]
     pub time_grain: Option<String>,
     #[doc = "Collection of workers that are active during this time."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<PerfMonSample>,
 }
 impl PerfMonSet {
@@ -8476,7 +9003,12 @@ pub mod private_access {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<bool>,
         #[doc = "The Virtual Networks (and subnets) allowed to access the site privately."]
-        #[serde(rename = "virtualNetworks", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "virtualNetworks",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub virtual_networks: Vec<PrivateAccessVirtualNetwork>,
     }
     impl Properties {
@@ -8513,7 +9045,11 @@ pub struct PrivateAccessVirtualNetwork {
     #[serde(rename = "resourceId", default, skip_serializing_if = "Option::is_none")]
     pub resource_id: Option<String>,
     #[doc = "A List of subnets that access is allowed to on this Virtual Network. An empty array (but not null) is interpreted to mean that all subnets are allowed within this Virtual Network."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subnets: Vec<PrivateAccessSubnet>,
 }
 impl PrivateAccessVirtualNetwork {
@@ -8612,10 +9148,20 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "RequiredMembers of a private link resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "RequiredZoneNames of a private link resource"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
 }
 impl PrivateLinkResourceProperties {
@@ -8677,16 +9223,32 @@ pub mod process_info {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub parent: Option<String>,
         #[doc = "Child process list."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub children: Vec<String>,
         #[doc = "Thread list."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub threads: Vec<ProcessThreadInfo>,
         #[doc = "List of open files."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub open_file_handles: Vec<String>,
         #[doc = "List of modules."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub modules: Vec<ProcessModuleInfo>,
         #[doc = "File name of this process."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -9119,7 +9681,11 @@ pub struct QueryUtterancesResults {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub query: Option<String>,
     #[doc = "Array of utterance results for search query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub results: Vec<QueryUtterancesResult>,
 }
 impl QueryUtterancesResults {
@@ -9137,7 +9703,11 @@ pub struct QueueScaleRule {
     #[serde(rename = "queueLength", default, skip_serializing_if = "Option::is_none")]
     pub queue_length: Option<i32>,
     #[doc = "Authentication secrets for the queue scale rule."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auth: Vec<ScaleRuleAuth>,
 }
 impl QueueScaleRule {
@@ -9225,7 +9795,12 @@ pub mod recommendation {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub channels: Option<properties::Channels>,
         #[doc = "The list of category tags that this recommendation belongs to."]
-        #[serde(rename = "categoryTags", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "categoryTags",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub category_tags: Vec<String>,
         #[doc = "Name of action recommended by this object."]
         #[serde(rename = "actionName", default, skip_serializing_if = "Option::is_none")]
@@ -9234,7 +9809,11 @@ pub mod recommendation {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<i32>,
         #[doc = "The list of states of this recommendation. If it's null then it should be considered \"Active\"."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub states: Vec<String>,
         #[doc = "The beginning time in UTC of a range that the recommendation refers to."]
         #[serde(rename = "startTime", default, with = "azure_core::date::rfc3339::option")]
@@ -9396,7 +9975,12 @@ pub mod recommendation_rule {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub channels: Option<properties::Channels>,
         #[doc = "The list of category tags that this recommendation rule belongs to."]
-        #[serde(rename = "categoryTags", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "categoryTags",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub category_tags: Vec<String>,
         #[doc = "True if this is associated with a dynamically added rule"]
         #[serde(rename = "isDynamic", default, skip_serializing_if = "Option::is_none")]
@@ -9490,19 +10074,42 @@ impl Serialize for RecurrenceFrequency {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RecurrenceSchedule {
     #[doc = "The minutes."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minutes: Vec<i32>,
     #[doc = "The hours."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hours: Vec<i32>,
     #[doc = "The days of the week."]
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<String>,
     #[doc = "The month days."]
-    #[serde(rename = "monthDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub month_days: Vec<i32>,
     #[doc = "The monthly occurrences."]
-    #[serde(rename = "monthlyOccurrences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthlyOccurrences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monthly_occurrences: Vec<RecurrenceScheduleOccurrence>,
 }
 impl RecurrenceSchedule {
@@ -9661,7 +10268,12 @@ pub mod remote_private_endpoint_connection {
         #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
         pub private_link_service_connection_state: Option<PrivateLinkConnectionState>,
         #[doc = "Private IPAddresses mapped to the remote private endpoint"]
-        #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_addresses: Vec<String>,
     }
     impl Properties {
@@ -9698,7 +10310,12 @@ pub mod remote_private_endpoint_connection_arm_resource {
         #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
         pub private_link_service_connection_state: Option<PrivateLinkConnectionState>,
         #[doc = "Private IPAddresses mapped to the remote private endpoint"]
-        #[serde(rename = "ipAddresses", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddresses",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_addresses: Vec<String>,
     }
     impl Properties {
@@ -9845,7 +10462,11 @@ impl RequestHistory {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RequestHistoryListResult {
     #[doc = "A list of workflow request histories."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RequestHistory>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -10044,7 +10665,12 @@ pub mod resource_metric_definition {
         #[serde(rename = "primaryAggregationType", default, skip_serializing_if = "Option::is_none")]
         pub primary_aggregation_type: Option<String>,
         #[doc = "List of time grains supported for the metric together with retention period."]
-        #[serde(rename = "metricAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "metricAvailabilities",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub metric_availabilities: Vec<ResourceMetricAvailability>,
         #[doc = "Resource URI."]
         #[serde(rename = "resourceUri", default, skip_serializing_if = "Option::is_none")]
@@ -10288,7 +10914,11 @@ pub struct ResponseMessageEnvelopeRemotePrivateEndpointConnection {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub identity: Option<ManagedServiceIdentity>,
     #[doc = "Logical Availability Zones the service is hosted in"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl ResponseMessageEnvelopeRemotePrivateEndpointConnection {
@@ -10338,7 +10968,11 @@ pub mod restore_request {
         #[serde(rename = "siteName", default, skip_serializing_if = "Option::is_none")]
         pub site_name: Option<String>,
         #[doc = "Collection of databases which should be restored. This list has to match the list of databases included in the backup."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub databases: Vec<DatabaseBackupSetting>,
         #[doc = "Changes a logic when restoring an app with custom domains. <code>true</code> to remove custom domains automatically. If <code>false</code>, custom domains are added to \nthe app's object when it is being restored, but that might fail due to conflicts during the operation."]
         #[serde(rename = "ignoreConflictingHostNames", default, skip_serializing_if = "Option::is_none")]
@@ -10604,7 +11238,12 @@ pub struct RunCorrelation {
     #[serde(rename = "clientTrackingId", default, skip_serializing_if = "Option::is_none")]
     pub client_tracking_id: Option<String>,
     #[doc = "The client keywords."]
-    #[serde(rename = "clientKeywords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "clientKeywords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub client_keywords: Vec<String>,
 }
 impl RunCorrelation {
@@ -10619,7 +11258,11 @@ pub struct SampleUtterance {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub text: Option<String>,
     #[doc = "Links attribute of sample utterance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<String>,
     #[doc = "Question id of sample utterance (for stackoverflow questions titles)."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -10640,7 +11283,11 @@ pub struct Scale {
     #[serde(rename = "maxReplicas", default, skip_serializing_if = "Option::is_none")]
     pub max_replicas: Option<i32>,
     #[doc = "Scaling rules."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rules: Vec<ScaleRule>,
 }
 impl Scale {
@@ -10713,9 +11360,19 @@ impl SecretsCollection {
 #[doc = "Resource metrics service provided by Microsoft.Insights resource provider."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -10757,7 +11414,12 @@ pub mod site {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub state: Option<String>,
         #[doc = "Hostnames associated with the app."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Name of the repository site."]
         #[serde(rename = "repositorySiteName", default, skip_serializing_if = "Option::is_none")]
@@ -10769,13 +11431,23 @@ pub mod site {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<bool>,
         #[doc = "Enabled hostnames for the app.Hostnames need to be assigned (see HostNames) AND enabled. Otherwise,\nthe app is not served on those hostnames."]
-        #[serde(rename = "enabledHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "enabledHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub enabled_host_names: Vec<String>,
         #[doc = "Management information availability state for the app."]
         #[serde(rename = "availabilityState", default, skip_serializing_if = "Option::is_none")]
         pub availability_state: Option<properties::AvailabilityState>,
         #[doc = "Hostname SSL states are used to manage the SSL bindings for app's hostnames."]
-        #[serde(rename = "hostNameSslStates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNameSslStates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_name_ssl_states: Vec<HostNameSslState>,
         #[doc = "Resource ID of the associated App Service plan, formatted as: \"/subscriptions/{subscriptionID}/resourceGroups/{groupName}/providers/Microsoft.Web/serverfarms/{appServicePlanName}\"."]
         #[serde(rename = "serverFarmId", default, skip_serializing_if = "Option::is_none")]
@@ -10805,7 +11477,12 @@ pub mod site {
         #[serde(rename = "siteConfig", default, skip_serializing_if = "Option::is_none")]
         pub site_config: Option<SiteConfig>,
         #[doc = "Azure Traffic Manager hostnames associated with the app. Read-only."]
-        #[serde(rename = "trafficManagerHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "trafficManagerHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub traffic_manager_host_names: Vec<String>,
         #[doc = "<code>true</code> to stop SCM (KUDU) site when the app is stopped; otherwise, <code>false</code>. The default is <code>false</code>."]
         #[serde(rename = "scmSiteAlsoStopped", default, skip_serializing_if = "Option::is_none")]
@@ -10959,7 +11636,12 @@ pub mod site_auth_settings {
         #[serde(rename = "tokenStoreEnabled", default, skip_serializing_if = "Option::is_none")]
         pub token_store_enabled: Option<bool>,
         #[doc = "External URLs that can be redirected to as part of logging in or logging out of the app. Note that the query string part of the URL is ignored.\nThis is an advanced setting typically only needed by Windows Store application backends.\nNote that URLs within the current domain are always implicitly allowed."]
-        #[serde(rename = "allowedExternalRedirectUrls", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "allowedExternalRedirectUrls",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub allowed_external_redirect_urls: Vec<String>,
         #[doc = "The default authentication provider to use when multiple providers are configured.\nThis setting is only needed if multiple providers are configured and the unauthenticated client\naction is set to \"RedirectToLoginPage\"."]
         #[serde(rename = "defaultProvider", default, skip_serializing_if = "Option::is_none")]
@@ -10986,10 +11668,20 @@ pub mod site_auth_settings {
         #[serde(rename = "validateIssuer", default, skip_serializing_if = "Option::is_none")]
         pub validate_issuer: Option<bool>,
         #[doc = "Allowed audience values to consider when validating JWTs issued by \nAzure Active Directory. Note that the <code>ClientID</code> value is always considered an\nallowed audience, regardless of this setting."]
-        #[serde(rename = "allowedAudiences", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "allowedAudiences",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub allowed_audiences: Vec<String>,
         #[doc = "Login parameters to send to the OpenID Connect authorization endpoint when\na user logs in. Each parameter must be in the form \"key=value\"."]
-        #[serde(rename = "additionalLoginParams", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "additionalLoginParams",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub additional_login_params: Vec<String>,
         #[doc = "Gets a JSON string containing the Azure AD Acl settings."]
         #[serde(rename = "aadClaimsAuthorization", default, skip_serializing_if = "Option::is_none")]
@@ -11004,7 +11696,12 @@ pub mod site_auth_settings {
         #[serde(rename = "googleClientSecretSettingName", default, skip_serializing_if = "Option::is_none")]
         pub google_client_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of Google Sign-In authentication.\nThis setting is optional. If not specified, \"openid\", \"profile\", and \"email\" are used as default scopes.\nGoogle Sign-In documentation: https://developers.google.com/identity/sign-in/web/"]
-        #[serde(rename = "googleOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "googleOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub google_o_auth_scopes: Vec<String>,
         #[doc = "The App ID of the Facebook app used for login.\nThis setting is required for enabling Facebook Login.\nFacebook Login documentation: https://developers.facebook.com/docs/facebook-login"]
         #[serde(rename = "facebookAppId", default, skip_serializing_if = "Option::is_none")]
@@ -11016,7 +11713,12 @@ pub mod site_auth_settings {
         #[serde(rename = "facebookAppSecretSettingName", default, skip_serializing_if = "Option::is_none")]
         pub facebook_app_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of Facebook Login authentication.\nThis setting is optional.\nFacebook Login documentation: https://developers.facebook.com/docs/facebook-login"]
-        #[serde(rename = "facebookOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "facebookOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub facebook_o_auth_scopes: Vec<String>,
         #[doc = "The Client Id of the GitHub app used for login.\nThis setting is required for enabling Github login"]
         #[serde(rename = "gitHubClientId", default, skip_serializing_if = "Option::is_none")]
@@ -11028,7 +11730,12 @@ pub mod site_auth_settings {
         #[serde(rename = "gitHubClientSecretSettingName", default, skip_serializing_if = "Option::is_none")]
         pub git_hub_client_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of GitHub Login authentication.\nThis setting is optional"]
-        #[serde(rename = "gitHubOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "gitHubOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub git_hub_o_auth_scopes: Vec<String>,
         #[doc = "The OAuth 1.0a consumer key of the Twitter application used for sign-in.\nThis setting is required for enabling Twitter Sign-In.\nTwitter Sign-In documentation: https://dev.twitter.com/web/sign-in"]
         #[serde(rename = "twitterConsumerKey", default, skip_serializing_if = "Option::is_none")]
@@ -11053,7 +11760,12 @@ pub mod site_auth_settings {
         )]
         pub microsoft_account_client_secret_setting_name: Option<String>,
         #[doc = "The OAuth 2.0 scopes that will be requested as part of Microsoft Account authentication.\nThis setting is optional. If not specified, \"wl.basic\" is used as the default scope.\nMicrosoft Account Scopes and permissions documentation: https://msdn.microsoft.com/en-us/library/dn631845.aspx"]
-        #[serde(rename = "microsoftAccountOAuthScopes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "microsoftAccountOAuthScopes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub microsoft_account_o_auth_scopes: Vec<String>,
         #[doc = "\"true\" if the auth config settings should be read from a file,\n\"false\" otherwise"]
         #[serde(rename = "isAuthFromFile", default, skip_serializing_if = "Option::is_none")]
@@ -11138,13 +11850,28 @@ pub struct SiteCloneability {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub result: Option<site_cloneability::Result>,
     #[doc = "List of features enabled on app that prevent cloning."]
-    #[serde(rename = "blockingFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockingFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocking_features: Vec<SiteCloneabilityCriterion>,
     #[doc = "List of features enabled on app that are non-blocking but cannot be cloned. The app can still be cloned\nbut the features in this list will not be set up on cloned app."]
-    #[serde(rename = "unsupportedFeatures", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "unsupportedFeatures",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unsupported_features: Vec<SiteCloneabilityCriterion>,
     #[doc = "List of blocking application characteristics."]
-    #[serde(rename = "blockingCharacteristics", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "blockingCharacteristics",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blocking_characteristics: Vec<SiteCloneabilityCriterion>,
 }
 impl SiteCloneability {
@@ -11184,7 +11911,12 @@ pub struct SiteConfig {
     #[serde(rename = "numberOfWorkers", default, skip_serializing_if = "Option::is_none")]
     pub number_of_workers: Option<i32>,
     #[doc = "Default documents."]
-    #[serde(rename = "defaultDocuments", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultDocuments",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_documents: Vec<String>,
     #[doc = ".NET Framework version."]
     #[serde(rename = "netFrameworkVersion", default, skip_serializing_if = "Option::is_none")]
@@ -11238,16 +11970,31 @@ pub struct SiteConfig {
     #[serde(rename = "publishingUsername", default, skip_serializing_if = "Option::is_none")]
     pub publishing_username: Option<String>,
     #[doc = "Application settings."]
-    #[serde(rename = "appSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_settings: Vec<NameValuePair>,
     #[doc = "Connection strings."]
-    #[serde(rename = "connectionStrings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionStrings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_strings: Vec<ConnStringInfo>,
     #[doc = "MachineKey of an app."]
     #[serde(rename = "machineKey", default, skip_serializing_if = "Option::is_none")]
     pub machine_key: Option<SiteMachineKey>,
     #[doc = "Handler mappings."]
-    #[serde(rename = "handlerMappings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "handlerMappings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub handler_mappings: Vec<HandlerMapping>,
     #[doc = "Document root."]
     #[serde(rename = "documentRoot", default, skip_serializing_if = "Option::is_none")]
@@ -11280,7 +12027,12 @@ pub struct SiteConfig {
     #[serde(rename = "managedPipelineMode", default, skip_serializing_if = "Option::is_none")]
     pub managed_pipeline_mode: Option<site_config::ManagedPipelineMode>,
     #[doc = "Virtual applications."]
-    #[serde(rename = "virtualApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_applications: Vec<VirtualApplication>,
     #[doc = "Site load balancing."]
     #[serde(rename = "loadBalancing", default, skip_serializing_if = "Option::is_none")]
@@ -11337,10 +12089,20 @@ pub struct SiteConfig {
     #[serde(rename = "keyVaultReferenceIdentity", default, skip_serializing_if = "Option::is_none")]
     pub key_vault_reference_identity: Option<String>,
     #[doc = "IP security restrictions for main."]
-    #[serde(rename = "ipSecurityRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipSecurityRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_security_restrictions: Vec<IpSecurityRestriction>,
     #[doc = "IP security restrictions for scm."]
-    #[serde(rename = "scmIpSecurityRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scmIpSecurityRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scm_ip_security_restrictions: Vec<IpSecurityRestriction>,
     #[doc = "IP security restrictions for scm to use main."]
     #[serde(rename = "scmIpSecurityRestrictionsUseMain", default, skip_serializing_if = "Option::is_none")]
@@ -11755,7 +12517,11 @@ pub mod site_extension_info {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub feed_url: Option<String>,
         #[doc = "List of authors."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub authors: Vec<String>,
         #[doc = "Installer command line parameters."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11920,7 +12686,12 @@ pub mod site_patch_resource {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub state: Option<String>,
         #[doc = "Hostnames associated with the app."]
-        #[serde(rename = "hostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_names: Vec<String>,
         #[doc = "Name of the repository site."]
         #[serde(rename = "repositorySiteName", default, skip_serializing_if = "Option::is_none")]
@@ -11932,13 +12703,23 @@ pub mod site_patch_resource {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub enabled: Option<bool>,
         #[doc = "Enabled hostnames for the app.Hostnames need to be assigned (see HostNames) AND enabled. Otherwise,\nthe app is not served on those hostnames."]
-        #[serde(rename = "enabledHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "enabledHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub enabled_host_names: Vec<String>,
         #[doc = "Management information availability state for the app."]
         #[serde(rename = "availabilityState", default, skip_serializing_if = "Option::is_none")]
         pub availability_state: Option<properties::AvailabilityState>,
         #[doc = "Hostname SSL states are used to manage the SSL bindings for app's hostnames."]
-        #[serde(rename = "hostNameSslStates", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hostNameSslStates",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub host_name_ssl_states: Vec<HostNameSslState>,
         #[doc = "Resource ID of the associated App Service plan, formatted as: \"/subscriptions/{subscriptionID}/resourceGroups/{groupName}/providers/Microsoft.Web/serverfarms/{appServicePlanName}\"."]
         #[serde(rename = "serverFarmId", default, skip_serializing_if = "Option::is_none")]
@@ -11959,7 +12740,12 @@ pub mod site_patch_resource {
         #[serde(rename = "siteConfig", default, skip_serializing_if = "Option::is_none")]
         pub site_config: Option<SiteConfig>,
         #[doc = "Azure Traffic Manager hostnames associated with the app. Read-only."]
-        #[serde(rename = "trafficManagerHostNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "trafficManagerHostNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub traffic_manager_host_names: Vec<String>,
         #[doc = "<code>true</code> to stop SCM (KUDU) site when the app is stopped; otherwise, <code>false</code>. The default is <code>false</code>."]
         #[serde(rename = "scmSiteAlsoStopped", default, skip_serializing_if = "Option::is_none")]
@@ -12235,10 +13021,18 @@ pub struct SkuDescription {
     #[serde(rename = "skuCapacity", default, skip_serializing_if = "Option::is_none")]
     pub sku_capacity: Option<SkuCapacity>,
     #[doc = "Locations of the SKU."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "Capabilities of the SKU, e.g., is traffic manager enabled?"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<Capability>,
 }
 impl SkuDescription {
@@ -12291,7 +13085,11 @@ pub struct SkuInfos {
     #[serde(rename = "resourceType", default, skip_serializing_if = "Option::is_none")]
     pub resource_type: Option<String>,
     #[doc = "List of SKUs the subscription is able to use."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skus: Vec<GlobalCsmSkuDescription>,
 }
 impl SkuInfos {
@@ -12303,13 +13101,28 @@ impl SkuInfos {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SlotConfigNames {
     #[doc = "List of connection string names."]
-    #[serde(rename = "connectionStringNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "connectionStringNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub connection_string_names: Vec<String>,
     #[doc = "List of application settings names."]
-    #[serde(rename = "appSettingNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appSettingNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_setting_names: Vec<String>,
     #[doc = "List of external Azure storage account identifiers."]
-    #[serde(rename = "azureStorageConfigNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "azureStorageConfigNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub azure_storage_config_names: Vec<String>,
 }
 impl SlotConfigNames {
@@ -12570,10 +13383,18 @@ pub struct Solution {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<solution::Type>,
     #[doc = "Solution Data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data: Vec<Vec<NameValuePair>>,
     #[doc = "Solution Metadata."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<Vec<NameValuePair>>,
 }
 impl Solution {
@@ -12662,7 +13483,12 @@ pub struct StackMajorVersion {
     #[serde(rename = "isDefault", default, skip_serializing_if = "Option::is_none")]
     pub is_default: Option<bool>,
     #[doc = "Minor versions associated with the major version."]
-    #[serde(rename = "minorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "minorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minor_versions: Vec<StackMinorVersion>,
     #[doc = "<code>true</code> if this supports Application Insights; otherwise, <code>false</code>."]
     #[serde(rename = "applicationInsights", default, skip_serializing_if = "Option::is_none")]
@@ -12810,7 +13636,12 @@ pub struct StaticSite {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub branch: Option<String>,
     #[doc = "The custom domains associated with this static site."]
-    #[serde(rename = "customDomains", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customDomains",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_domains: Vec<String>,
     #[doc = "A user's github repository token. This is used to setup the Github Actions workflow file and API secrets."]
     #[serde(rename = "repositoryToken", default, skip_serializing_if = "Option::is_none")]
@@ -12819,7 +13650,12 @@ pub struct StaticSite {
     #[serde(rename = "buildProperties", default, skip_serializing_if = "Option::is_none")]
     pub build_properties: Option<StaticSiteBuildProperties>,
     #[doc = "Private endpoint connections"]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<ResponseMessageEnvelopeRemotePrivateEndpointConnection>,
     #[doc = "State indicating whether staging environments are allowed or not allowed for a static web app."]
     #[serde(rename = "stagingEnvironmentPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -12837,10 +13673,20 @@ pub struct StaticSite {
     #[serde(rename = "keyVaultReferenceIdentity", default, skip_serializing_if = "Option::is_none")]
     pub key_vault_reference_identity: Option<String>,
     #[doc = "User provided function apps registered with the static site"]
-    #[serde(rename = "userProvidedFunctionApps", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userProvidedFunctionApps",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_provided_function_apps: Vec<StaticSiteUserProvidedFunctionApp>,
     #[doc = "Backends linked to the static side"]
-    #[serde(rename = "linkedBackends", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedBackends",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_backends: Vec<StaticSiteLinkedBackend>,
     #[doc = "The provider that submitted the last deployment to the primary environment of the static site."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -12973,10 +13819,20 @@ pub mod static_site_build_arm_resource {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub status: Option<properties::Status>,
         #[doc = "User provided function apps registered with the static site build"]
-        #[serde(rename = "userProvidedFunctionApps", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "userProvidedFunctionApps",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub user_provided_function_apps: Vec<StaticSiteUserProvidedFunctionApp>,
         #[doc = "Backends linked to the static side build"]
-        #[serde(rename = "linkedBackends", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "linkedBackends",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub linked_backends: Vec<StaticSiteLinkedBackend>,
     }
     impl Properties {
@@ -13980,7 +14836,11 @@ pub struct StringList {
     #[serde(flatten)]
     pub proxy_only_resource: ProxyOnlyResource,
     #[doc = "List of string resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub properties: Vec<String>,
 }
 impl StringList {
@@ -14054,7 +14914,11 @@ pub struct Template {
     #[serde(rename = "revisionSuffix", default, skip_serializing_if = "Option::is_none")]
     pub revision_suffix: Option<String>,
     #[doc = "List of container definitions for the Container App."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub containers: Vec<Container>,
     #[doc = "Container App scaling configurations."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -14235,7 +15099,11 @@ pub mod triggered_job_history {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Properties {
         #[doc = "List of triggered web job runs."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub runs: Vec<TriggeredJobRun>,
     }
     impl Properties {
@@ -14726,7 +15594,12 @@ pub struct VirtualApplication {
     #[serde(rename = "preloadEnabled", default, skip_serializing_if = "Option::is_none")]
     pub preload_enabled: Option<bool>,
     #[doc = "Virtual directories for virtual application."]
-    #[serde(rename = "virtualDirectories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "virtualDirectories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub virtual_directories: Vec<VirtualDirectory>,
 }
 impl VirtualApplication {
@@ -14846,7 +15719,11 @@ pub struct VnetInfo {
     #[serde(rename = "certBlob", default, skip_serializing_if = "Option::is_none")]
     pub cert_blob: Option<String>,
     #[doc = "The routes that this Virtual Network connection uses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub routes: Vec<VnetRoute>,
     #[doc = "<code>true</code> if a resync is required; otherwise, <code>false</code>."]
     #[serde(rename = "resyncRequired", default, skip_serializing_if = "Option::is_none")]
@@ -15021,10 +15898,19 @@ pub mod vnet_validation_failure_details {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub failed: Option<bool>,
         #[doc = "A list of tests that failed in the validation."]
-        #[serde(rename = "failedTests", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "failedTests",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub failed_tests: Vec<VnetValidationTestFailure>,
         #[doc = "A list of warnings generated during validation."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub warnings: Vec<VnetValidationTestFailure>,
     }
     impl Properties {
@@ -15115,7 +16001,12 @@ pub struct WebAppMajorVersion {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     #[doc = "Minor versions associated with the major version."]
-    #[serde(rename = "minorVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "minorVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minor_versions: Vec<WebAppMinorVersion>,
 }
 impl WebAppMajorVersion {
@@ -15230,7 +16121,12 @@ pub mod web_app_stack {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub value: Option<String>,
         #[doc = "List of major versions available."]
-        #[serde(rename = "majorVersions", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "majorVersions",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub major_versions: Vec<WebAppMajorVersion>,
         #[doc = "Web App stack preferred OS."]
         #[serde(rename = "preferredOs", default, skip_serializing_if = "Option::is_none")]
@@ -15449,7 +16345,12 @@ pub struct WorkerPool {
     #[serde(rename = "workerCount", default, skip_serializing_if = "Option::is_none")]
     pub worker_count: Option<i32>,
     #[doc = "Names of all instances in the worker pool (read only)."]
-    #[serde(rename = "instanceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "instanceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instance_names: Vec<String>,
 }
 impl WorkerPool {
@@ -15537,7 +16438,11 @@ impl WorkflowFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowListResult {
     #[doc = "The list of workflows."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Workflow>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15787,7 +16692,11 @@ impl WorkflowRunActionFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowRunActionListResult {
     #[doc = "A list of workflow run actions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowRunAction>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -15836,7 +16745,12 @@ pub struct WorkflowRunActionProperties {
     #[serde(rename = "trackedProperties", default, skip_serializing_if = "Option::is_none")]
     pub tracked_properties: Option<Object>,
     #[doc = "Gets the retry histories."]
-    #[serde(rename = "retryHistory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "retryHistory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub retry_history: Vec<RetryHistory>,
 }
 impl WorkflowRunActionProperties {
@@ -15866,7 +16780,11 @@ pub struct WorkflowRunActionRepetitionDefinitionCollection {
     #[doc = "The link used to get the next page of recommendations."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowRunActionRepetitionDefinition>,
 }
 impl azure_core::Continuable for WorkflowRunActionRepetitionDefinitionCollection {
@@ -15886,7 +16804,12 @@ pub struct WorkflowRunActionRepetitionProperties {
     #[serde(flatten)]
     pub operation_result: OperationResult,
     #[doc = "The repetition indexes."]
-    #[serde(rename = "repetitionIndexes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "repetitionIndexes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub repetition_indexes: Vec<RepetitionIndex>,
 }
 impl WorkflowRunActionRepetitionProperties {
@@ -15910,7 +16833,11 @@ impl WorkflowRunFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowRunListResult {
     #[doc = "A list of workflow runs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowRun>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16217,7 +17144,12 @@ pub struct WorkflowTriggerCallbackUrl {
     #[serde(rename = "relativePath", default, skip_serializing_if = "Option::is_none")]
     pub relative_path: Option<String>,
     #[doc = "Gets the workflow trigger callback URL relative path parameters."]
-    #[serde(rename = "relativePathParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "relativePathParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub relative_path_parameters: Vec<String>,
     #[doc = "Gets the workflow trigger callback URL query parameters."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -16276,7 +17208,11 @@ impl WorkflowTriggerHistoryFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowTriggerHistoryListResult {
     #[doc = "A list of workflow trigger histories."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowTriggerHistory>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16365,7 +17301,11 @@ impl WorkflowTriggerListCallbackUrlQueries {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowTriggerListResult {
     #[doc = "A list of workflow triggers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowTrigger>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -16532,7 +17472,11 @@ impl WorkflowVersion {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WorkflowVersionListResult {
     #[doc = "A list of workflow versions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WorkflowVersion>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/webpubsub/src/package_2021_04_01_preview/models.rs b/services/mgmt/webpubsub/src/package_2021_04_01_preview/models.rs
index 3598033423..7a85b74e93 100644
--- a/services/mgmt/webpubsub/src/package_2021_04_01_preview/models.rs
+++ b/services/mgmt/webpubsub/src/package_2021_04_01_preview/models.rs
@@ -89,10 +89,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -344,7 +353,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The dimensions of the metrics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
 }
 impl MetricSpecification {
@@ -388,10 +401,18 @@ impl NameAvailabilityParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkAcl {
     #[doc = "Allowed request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allow: Vec<WebPubSubRequestType>,
     #[doc = "Denied request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deny: Vec<WebPubSubRequestType>,
 }
 impl NetworkAcl {
@@ -448,7 +469,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -526,7 +551,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionList {
     #[doc = "The list of the private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -579,7 +608,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceList {
     #[doc = "List of PrivateLinkResource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -603,13 +636,28 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required members of the private link resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required private DNS zone names"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "The list of resources that are onboarded to private link service"]
-    #[serde(rename = "shareablePrivateLinkResourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareablePrivateLinkResourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shareable_private_link_resource_types: Vec<ShareablePrivateLinkResourceType>,
 }
 impl PrivateLinkResourceProperties {
@@ -801,10 +849,20 @@ impl ResourceSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Metrics for Azure Monitoring."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "Specifications of the Logs for Azure Monitoring."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -866,7 +924,11 @@ impl SharedPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedPrivateLinkResourceList {
     #[doc = "The list of the shared private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedPrivateLinkResource>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -984,7 +1046,11 @@ impl SignalRServiceUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRServiceUsageList {
     #[doc = "List of the resource usages"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SignalRServiceUsage>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1151,7 +1217,12 @@ pub struct WebPubSubNetworkAcLs {
     #[serde(rename = "publicNetwork", default, skip_serializing_if = "Option::is_none")]
     pub public_network: Option<NetworkAcl>,
     #[doc = "ACLs for requests from private endpoints"]
-    #[serde(rename = "privateEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoints: Vec<PrivateEndpointAcl>,
 }
 impl WebPubSubNetworkAcLs {
@@ -1181,16 +1252,30 @@ pub struct WebPubSubProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "Private endpoint connections to the resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
     #[doc = "TLS settings for the resource"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tls: Option<WebPubSubTlsSettings>,
     #[doc = "List of the featureFlags.\r\n\r\nFeatureFlags that are not included in the parameters for the update operation will not be modified.\r\nAnd the response will only include featureFlags that are explicitly set. \r\nWhen a featureFlag is not explicitly set, its globally default value will be used\r\nBut keep in mind, the default value doesn't mean \"false\". It varies in terms of different FeatureFlags."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<WebPubSubFeature>,
     #[doc = "The settings for event handler in webpubsub service"]
     #[serde(rename = "eventHandler", default, skip_serializing_if = "Option::is_none")]
@@ -1276,7 +1361,11 @@ impl WebPubSubResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebPubSubResourceList {
     #[doc = "List of the resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WebPubSubResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/webpubsub/src/package_2021_06_01_preview/models.rs b/services/mgmt/webpubsub/src/package_2021_06_01_preview/models.rs
index 8b9c64c080..2f83cffe2e 100644
--- a/services/mgmt/webpubsub/src/package_2021_06_01_preview/models.rs
+++ b/services/mgmt/webpubsub/src/package_2021_06_01_preview/models.rs
@@ -107,10 +107,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -323,7 +332,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The dimensions of the metrics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
 }
 impl MetricSpecification {
@@ -367,10 +380,18 @@ impl NameAvailabilityParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkAcl {
     #[doc = "Allowed request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allow: Vec<WebPubSubRequestType>,
     #[doc = "Denied request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deny: Vec<WebPubSubRequestType>,
 }
 impl NetworkAcl {
@@ -427,7 +448,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -505,7 +530,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionList {
     #[doc = "The list of the private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -558,7 +587,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceList {
     #[doc = "List of PrivateLinkResource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -582,13 +615,28 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required members of the private link resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required private DNS zone names"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "The list of resources that are onboarded to private link service"]
-    #[serde(rename = "shareablePrivateLinkResourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareablePrivateLinkResourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shareable_private_link_resource_types: Vec<ShareablePrivateLinkResourceType>,
 }
 impl PrivateLinkResourceProperties {
@@ -780,10 +828,20 @@ impl ResourceSku {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Metrics for Azure Monitoring."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "Specifications of the Logs for Azure Monitoring."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -845,7 +903,11 @@ impl SharedPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedPrivateLinkResourceList {
     #[doc = "The list of the shared private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedPrivateLinkResource>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -963,7 +1025,11 @@ impl SignalRServiceUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRServiceUsageList {
     #[doc = "List of the resource usages"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SignalRServiceUsage>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1110,7 +1176,12 @@ pub struct WebPubSubNetworkAcLs {
     #[serde(rename = "publicNetwork", default, skip_serializing_if = "Option::is_none")]
     pub public_network: Option<NetworkAcl>,
     #[doc = "ACLs for requests from private endpoints"]
-    #[serde(rename = "privateEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoints: Vec<PrivateEndpointAcl>,
 }
 impl WebPubSubNetworkAcLs {
@@ -1140,10 +1211,20 @@ pub struct WebPubSubProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "Private endpoint connections to the resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
     #[doc = "TLS settings for the resource"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1241,7 +1322,11 @@ impl WebPubSubResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebPubSubResourceList {
     #[doc = "List of the resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WebPubSubResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/webpubsub/src/package_2021_09_01_preview/models.rs b/services/mgmt/webpubsub/src/package_2021_09_01_preview/models.rs
index 793772f9d8..99615129e8 100644
--- a/services/mgmt/webpubsub/src/package_2021_09_01_preview/models.rs
+++ b/services/mgmt/webpubsub/src/package_2021_09_01_preview/models.rs
@@ -89,10 +89,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -215,7 +224,11 @@ pub struct LiveTraceConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<String>,
     #[doc = "Gets or sets the list of category configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub categories: Vec<LiveTraceCategory>,
 }
 impl LiveTraceConfiguration {
@@ -335,7 +348,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The dimensions of the metrics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
 }
 impl MetricSpecification {
@@ -379,10 +396,18 @@ impl NameAvailabilityParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkAcl {
     #[doc = "Allowed request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allow: Vec<WebPubSubRequestType>,
     #[doc = "Denied request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deny: Vec<WebPubSubRequestType>,
 }
 impl NetworkAcl {
@@ -439,7 +464,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -517,7 +546,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionList {
     #[doc = "The list of the private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -570,7 +603,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceList {
     #[doc = "List of PrivateLinkResource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -594,13 +631,28 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required members of the private link resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required private DNS zone names"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "The list of resources that are onboarded to private link service"]
-    #[serde(rename = "shareablePrivateLinkResourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareablePrivateLinkResourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shareable_private_link_resource_types: Vec<ShareablePrivateLinkResourceType>,
 }
 impl PrivateLinkResourceProperties {
@@ -831,10 +883,20 @@ impl Serialize for ScaleType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Metrics for Azure Monitoring."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "Specifications of the Logs for Azure Monitoring."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -896,7 +958,11 @@ impl SharedPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedPrivateLinkResourceList {
     #[doc = "The list of the shared private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedPrivateLinkResource>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1014,7 +1080,11 @@ impl SignalRServiceUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRServiceUsageList {
     #[doc = "List of the resource usages"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SignalRServiceUsage>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1077,7 +1147,12 @@ pub struct SkuCapacity {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub default: Option<i32>,
     #[doc = "Allows capacity value list."]
-    #[serde(rename = "allowedValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_values: Vec<i32>,
     #[doc = "The scale type applicable to the sku."]
     #[serde(rename = "scaleType", default, skip_serializing_if = "Option::is_none")]
@@ -1092,7 +1167,11 @@ impl SkuCapacity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuList {
     #[doc = "The list of skus available for the resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Sku>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1218,7 +1297,12 @@ pub struct WebPubSubNetworkAcLs {
     #[serde(rename = "publicNetwork", default, skip_serializing_if = "Option::is_none")]
     pub public_network: Option<NetworkAcl>,
     #[doc = "ACLs for requests from private endpoints"]
-    #[serde(rename = "privateEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoints: Vec<PrivateEndpointAcl>,
 }
 impl WebPubSubNetworkAcLs {
@@ -1248,10 +1332,20 @@ pub struct WebPubSubProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "Private endpoint connections to the resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
     #[doc = "TLS settings for the resource"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1349,7 +1443,11 @@ impl WebPubSubResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebPubSubResourceList {
     #[doc = "List of the resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WebPubSubResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/webpubsub/src/package_2021_10_01/models.rs b/services/mgmt/webpubsub/src/package_2021_10_01/models.rs
index e0327325fd..4556c5d238 100644
--- a/services/mgmt/webpubsub/src/package_2021_10_01/models.rs
+++ b/services/mgmt/webpubsub/src/package_2021_10_01/models.rs
@@ -89,10 +89,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -128,7 +137,12 @@ pub struct EventHandler {
     #[serde(rename = "userEventPattern", default, skip_serializing_if = "Option::is_none")]
     pub user_event_pattern: Option<String>,
     #[doc = "Gets ot sets the list of system events."]
-    #[serde(rename = "systemEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "systemEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub system_events: Vec<String>,
     #[doc = "Upstream auth settings. If not set, no auth is used for upstream messages."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -205,7 +219,11 @@ pub struct LiveTraceConfiguration {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<String>,
     #[doc = "Gets or sets the list of category configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub categories: Vec<LiveTraceCategory>,
 }
 impl LiveTraceConfiguration {
@@ -325,7 +343,11 @@ pub struct MetricSpecification {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub category: Option<String>,
     #[doc = "The dimensions of the metrics."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dimensions: Vec<Dimension>,
 }
 impl MetricSpecification {
@@ -369,10 +391,18 @@ impl NameAvailabilityParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NetworkAcl {
     #[doc = "Allowed request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allow: Vec<WebPubSubRequestType>,
     #[doc = "Denied request types. The value can be one or more of: ClientConnection, ServerConnection, RESTAPI."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deny: Vec<WebPubSubRequestType>,
 }
 impl NetworkAcl {
@@ -429,7 +459,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations supported by the resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -507,7 +541,11 @@ impl PrivateEndpointConnection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateEndpointConnectionList {
     #[doc = "The list of the private endpoint connections"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateEndpointConnection>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -534,7 +572,12 @@ pub struct PrivateEndpointConnectionProperties {
     #[serde(rename = "privateEndpoint", default, skip_serializing_if = "Option::is_none")]
     pub private_endpoint: Option<PrivateEndpoint>,
     #[doc = "Group IDs"]
-    #[serde(rename = "groupIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "groupIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub group_ids: Vec<String>,
     #[doc = "Connection state of the private endpoint connection"]
     #[serde(rename = "privateLinkServiceConnectionState", default, skip_serializing_if = "Option::is_none")]
@@ -563,7 +606,11 @@ impl PrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PrivateLinkResourceList {
     #[doc = "List of PrivateLinkResource"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PrivateLinkResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -587,13 +634,28 @@ pub struct PrivateLinkResourceProperties {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "Required members of the private link resource"]
-    #[serde(rename = "requiredMembers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredMembers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_members: Vec<String>,
     #[doc = "Required private DNS zone names"]
-    #[serde(rename = "requiredZoneNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredZoneNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_zone_names: Vec<String>,
     #[doc = "The list of resources that are onboarded to private link service"]
-    #[serde(rename = "shareablePrivateLinkResourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "shareablePrivateLinkResourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shareable_private_link_resource_types: Vec<ShareablePrivateLinkResourceType>,
 }
 impl PrivateLinkResourceProperties {
@@ -771,7 +833,11 @@ impl ResourceLogCategory {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceLogConfiguration {
     #[doc = "Gets or sets the list of category configurations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub categories: Vec<ResourceLogCategory>,
 }
 impl ResourceLogConfiguration {
@@ -851,10 +917,20 @@ impl Serialize for ScaleType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceSpecification {
     #[doc = "Specifications of the Metrics for Azure Monitoring."]
-    #[serde(rename = "metricSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "metricSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metric_specifications: Vec<MetricSpecification>,
     #[doc = "Specifications of the Logs for Azure Monitoring."]
-    #[serde(rename = "logSpecifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logSpecifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_specifications: Vec<LogSpecification>,
 }
 impl ServiceSpecification {
@@ -916,7 +992,11 @@ impl SharedPrivateLinkResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SharedPrivateLinkResourceList {
     #[doc = "The list of the shared private link resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SharedPrivateLinkResource>,
     #[doc = "Request URL that can be used to query next page of private endpoint connections. Returned when the total number of requested private endpoint connections exceed maximum page size."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1034,7 +1114,11 @@ impl SignalRServiceUsage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SignalRServiceUsageList {
     #[doc = "List of the resource usages"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SignalRServiceUsage>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1097,7 +1181,12 @@ pub struct SkuCapacity {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub default: Option<i32>,
     #[doc = "Allows capacity value list."]
-    #[serde(rename = "allowedValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_values: Vec<i32>,
     #[doc = "The scale type applicable to the sku."]
     #[serde(rename = "scaleType", default, skip_serializing_if = "Option::is_none")]
@@ -1112,7 +1201,11 @@ impl SkuCapacity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuList {
     #[doc = "The list of skus available for the resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Sku>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1231,7 +1324,11 @@ impl WebPubSubHub {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebPubSubHubList {
     #[doc = "List of hub settings to this resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WebPubSubHub>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1252,7 +1349,12 @@ impl WebPubSubHubList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebPubSubHubProperties {
     #[doc = "Event handler of a hub."]
-    #[serde(rename = "eventHandlers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "eventHandlers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub event_handlers: Vec<EventHandler>,
     #[doc = "The settings for configuring if anonymous connections are allowed for this hub: \"allow\" or \"deny\". Default to \"deny\"."]
     #[serde(rename = "anonymousConnectPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -1294,7 +1396,12 @@ pub struct WebPubSubNetworkAcLs {
     #[serde(rename = "publicNetwork", default, skip_serializing_if = "Option::is_none")]
     pub public_network: Option<NetworkAcl>,
     #[doc = "ACLs for requests from private endpoints"]
-    #[serde(rename = "privateEndpoints", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpoints",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoints: Vec<PrivateEndpointAcl>,
 }
 impl WebPubSubNetworkAcLs {
@@ -1324,10 +1431,20 @@ pub struct WebPubSubProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub version: Option<String>,
     #[doc = "Private endpoint connections to the resource."]
-    #[serde(rename = "privateEndpointConnections", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "privateEndpointConnections",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub private_endpoint_connections: Vec<PrivateEndpointConnection>,
     #[doc = "The list of shared private link resources."]
-    #[serde(rename = "sharedPrivateLinkResources", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sharedPrivateLinkResources",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub shared_private_link_resources: Vec<SharedPrivateLinkResource>,
     #[doc = "TLS settings for the resource"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1428,7 +1545,11 @@ impl WebPubSubResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WebPubSubResourceList {
     #[doc = "List of the resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WebPubSubResource>,
     #[doc = "The URL the client should use to fetch the next page (per server side paging).\r\nIt's null for now, added for future use."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/windowsesu/src/package_2019_09_16_preview/models.rs b/services/mgmt/windowsesu/src/package_2019_09_16_preview/models.rs
index 30038d34a1..2230d28b52 100644
--- a/services/mgmt/windowsesu/src/package_2019_09_16_preview/models.rs
+++ b/services/mgmt/windowsesu/src/package_2019_09_16_preview/models.rs
@@ -13,7 +13,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -221,7 +225,11 @@ pub mod multiple_activation_key {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MultipleActivationKeyList {
     #[doc = "List of MAK keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MultipleActivationKey>,
     #[doc = "Link to the next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -286,7 +294,11 @@ impl OperationDisplay {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to the next page of resources."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/windowsiot/src/package_2018_02_preview/models.rs b/services/mgmt/windowsiot/src/package_2018_02_preview/models.rs
index 5e2c30ff4f..be04164845 100644
--- a/services/mgmt/windowsiot/src/package_2018_02_preview/models.rs
+++ b/services/mgmt/windowsiot/src/package_2018_02_preview/models.rs
@@ -35,7 +35,11 @@ impl DeviceServiceCheckNameAvailabilityParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeviceServiceDescriptionListResult {
     #[doc = "The array of DeviceService objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeviceService>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -170,7 +174,11 @@ impl OperationEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Windows IoT Device Service operations supported by the Microsoft.WindowsIoT resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/windowsiot/src/package_2019_06/models.rs b/services/mgmt/windowsiot/src/package_2019_06/models.rs
index 7580b1ceeb..92b9a91ab8 100644
--- a/services/mgmt/windowsiot/src/package_2019_06/models.rs
+++ b/services/mgmt/windowsiot/src/package_2019_06/models.rs
@@ -35,7 +35,11 @@ impl DeviceServiceCheckNameAvailabilityParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeviceServiceDescriptionListResult {
     #[doc = "The array of DeviceService objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeviceService>,
     #[doc = "The next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -191,7 +195,11 @@ impl OperationEntity {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of Windows IoT Device Service operations supported by the Microsoft.WindowsIoT resource provider."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationEntity>,
     #[doc = "URL to get the next set of operation list results if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/workloadmonitor/src/package_2018_08_31_preview/models.rs b/services/mgmt/workloadmonitor/src/package_2018_08_31_preview/models.rs
index fb2d987f31..76aab55beb 100644
--- a/services/mgmt/workloadmonitor/src/package_2018_08_31_preview/models.rs
+++ b/services/mgmt/workloadmonitor/src/package_2018_08_31_preview/models.rs
@@ -72,7 +72,11 @@ pub struct ComponentProperties {
     #[serde(rename = "aggregateProperties", default, skip_serializing_if = "Option::is_none")]
     pub aggregate_properties: Option<serde_json::Value>,
     #[doc = "component children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<Component>,
 }
 impl ComponentProperties {
@@ -180,7 +184,11 @@ pub struct ComponentsCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Collection of components."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Component>,
 }
 impl azure_core::Continuable for ComponentsCollection {
@@ -222,7 +230,11 @@ pub struct ErrorResponse {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "The list of invalid fields send in request, in case of validation error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorFieldContract>,
 }
 impl azure_core::Continuable for ErrorResponse {
@@ -380,7 +392,12 @@ pub struct MonitorInstanceProperties {
     #[serde(rename = "healthStateCategory", default, skip_serializing_if = "Option::is_none")]
     pub health_state_category: Option<monitor_instance_properties::HealthStateCategory>,
     #[doc = "Health state changes."]
-    #[serde(rename = "healthStateChanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "healthStateChanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_state_changes: Vec<HealthStateChange>,
     #[doc = "Start time for health state changes."]
     #[serde(rename = "healthStateChangesStartTime", default, with = "azure_core::date::rfc3339::option")]
@@ -398,7 +415,11 @@ pub struct MonitorInstanceProperties {
     #[serde(rename = "aggregateProperties", default, skip_serializing_if = "Option::is_none")]
     pub aggregate_properties: Option<serde_json::Value>,
     #[doc = "Health instance children."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children: Vec<MonitorInstance>,
 }
 impl MonitorInstanceProperties {
@@ -559,7 +580,11 @@ pub struct MonitorInstancesCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Collection of health instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<MonitorInstance>,
 }
 impl azure_core::Continuable for MonitorInstancesCollection {
@@ -613,7 +638,11 @@ pub struct MonitorProperties {
     #[serde(rename = "monitorState", default, skip_serializing_if = "Option::is_none")]
     pub monitor_state: Option<monitor_properties::MonitorState>,
     #[doc = "Collection of MonitorCriteria. For PATCH calls, instead of partial list, complete list of expected criteria should be passed for proper updating."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub criteria: Vec<MonitorCriteria>,
     #[doc = "Generates alerts or not"]
     #[serde(rename = "alertGeneration", default, skip_serializing_if = "Option::is_none")]
@@ -708,7 +737,11 @@ pub struct MonitorsCollection {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "Collection of Monitor."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Monitor>,
 }
 impl azure_core::Continuable for MonitorsCollection {
@@ -743,7 +776,12 @@ impl NotificationSetting {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationSettingProperties {
     #[doc = "List of action group resource ids to be notified"]
-    #[serde(rename = "actionGroupResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "actionGroupResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub action_group_resource_ids: Vec<String>,
 }
 impl NotificationSettingProperties {
@@ -754,7 +792,11 @@ impl NotificationSettingProperties {
 #[doc = "Model for collection of notificationSettings."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NotificationSettingsCollection {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NotificationSetting>,
     #[doc = "URL to the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -796,7 +838,11 @@ pub struct OperationListResult {
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
     #[doc = "List of operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
 }
 impl azure_core::Continuable for OperationListResult {
diff --git a/services/mgmt/workloadmonitor/src/package_2020_01_13_preview/models.rs b/services/mgmt/workloadmonitor/src/package_2020_01_13_preview/models.rs
index c629f5f4b0..6401643b4e 100644
--- a/services/mgmt/workloadmonitor/src/package_2020_01_13_preview/models.rs
+++ b/services/mgmt/workloadmonitor/src/package_2020_01_13_preview/models.rs
@@ -46,7 +46,11 @@ pub mod error_response {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub message: Option<String>,
         #[doc = "Error details."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub details: Vec<ErrorDetails>,
     }
     impl Error {
@@ -71,7 +75,11 @@ impl HealthMonitor {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthMonitorList {
     #[doc = "Array of health monitors of the virtual machine."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HealthMonitor>,
     #[doc = "Link to next page if the list is too long."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -144,7 +152,11 @@ impl HealthMonitorStateChange {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthMonitorStateChangeList {
     #[doc = "Array of health state changes within the specified time window."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<HealthMonitorStateChange>,
     #[doc = "Link to next page if the list is too long."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -281,7 +293,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationList {
     #[doc = "Array of available REST API operations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "Link to next page if the list is too long."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/mgmt/workloads/src/package_2021_12_01_preview/models.rs b/services/mgmt/workloads/src/package_2021_12_01_preview/models.rs
index 19308e1ae3..3c9373233d 100644
--- a/services/mgmt/workloads/src/package_2021_12_01_preview/models.rs
+++ b/services/mgmt/workloads/src/package_2021_12_01_preview/models.rs
@@ -532,7 +532,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Array of details about specific errors that led to this reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "Object containing more specific information than  the current object about the error."]
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
@@ -583,7 +587,11 @@ pub struct ErrorDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDefinition>,
 }
 impl ErrorDefinition {
@@ -604,10 +612,19 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[doc = "The error additional info."]
-    #[serde(rename = "additionalInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_info: Vec<ErrorAdditionalInfo>,
 }
 impl ErrorDetail {
@@ -979,7 +996,11 @@ impl Monitor {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MonitorListResult {
     #[doc = "The list of SAP monitors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Monitor>,
     #[doc = "The URL to get the next set of SAP monitors."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1367,7 +1388,11 @@ pub mod operation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationListResult {
     #[doc = "List of operations supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "URL to get the next set of operation list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1405,7 +1430,11 @@ pub struct OperationStatusResult {
     #[serde(rename = "endTime", default, with = "azure_core::date::rfc3339::option")]
     pub end_time: Option<time::OffsetDateTime>,
     #[doc = "The operations list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<OperationStatusResult>,
     #[doc = "The error detail."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1554,7 +1583,11 @@ pub mod operations_definition {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OperationsDefinitionArrayResponseWithContinuation {
     #[doc = "Defines the workload operation definition response properties."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OperationsDefinition>,
     #[doc = "The URL to get to the next set of results, if there are any."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1683,7 +1716,11 @@ impl ProviderInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderInstanceListResult {
     #[doc = "The list of provider instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderInstance>,
     #[doc = "The URL to get the next set of provider instances."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1859,10 +1896,18 @@ impl Resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestrictionInfo {
     #[doc = "The restriction locations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "The restriction zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
 }
 impl RestrictionInfo {
@@ -1891,7 +1936,11 @@ impl SapApplicationServerInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SapApplicationServerInstanceList {
     #[doc = "Gets the list of SAP Application Server instance resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SapApplicationServerInstance>,
     #[doc = "Gets the value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1985,7 +2034,12 @@ impl SapAvailabilityZoneDetailsRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SapAvailabilityZoneDetailsResult {
     #[doc = "Gets the list of availability zone pairs."]
-    #[serde(rename = "availabilityZonePairs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availabilityZonePairs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availability_zone_pairs: Vec<SapAvailabilityZonePair>,
 }
 impl SapAvailabilityZoneDetailsResult {
@@ -2012,7 +2066,11 @@ impl SapAvailabilityZonePair {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SapCentralInstanceList {
     #[doc = "Gets the list of SAP central services instance resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SapCentralServerInstance>,
     #[doc = "Gets the value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2074,7 +2132,12 @@ pub struct SapCentralServerProperties {
     #[serde(rename = "kernelPatch", default, skip_serializing_if = "Option::is_none")]
     pub kernel_patch: Option<String>,
     #[doc = "The list of virtual machines corresponding to the Central Services instance."]
-    #[serde(rename = "vmDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_details: Vec<CentralServerVmDetails>,
     #[doc = "Defines the SAP Instance status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2127,7 +2190,11 @@ impl SapDatabaseInstance {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SapDatabaseInstanceList {
     #[doc = "Gets the list of SAP Database instances."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SapDatabaseInstance>,
     #[doc = "Gets the value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2160,7 +2227,12 @@ pub struct SapDatabaseProperties {
     #[serde(rename = "ipAddress", default, skip_serializing_if = "Option::is_none")]
     pub ip_address: Option<String>,
     #[doc = "The list of virtual machines corresponding to the Database resource."]
-    #[serde(rename = "vmDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "vmDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub vm_details: Vec<DatabaseVmDetails>,
     #[doc = "Defines the SAP Instance status."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2290,7 +2362,12 @@ impl SapDiskConfigurationsRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SapDiskConfigurationsResult {
     #[doc = "Gets the list of Disk Configurations."]
-    #[serde(rename = "diskConfigurations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "diskConfigurations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub disk_configurations: Vec<SapDiskConfiguration>,
 }
 impl SapDiskConfigurationsResult {
@@ -2481,7 +2558,12 @@ impl Serialize for SapSoftwareInstallationType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SapSupportedResourceSkusResult {
     #[doc = "Gets the list of SAP supported SKUs."]
-    #[serde(rename = "supportedSkus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedSkus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_skus: Vec<SapSupportedSku>,
 }
 impl SapSupportedResourceSkusResult {
@@ -2582,7 +2664,11 @@ impl SapVirtualInstanceError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SapVirtualInstanceList {
     #[doc = "Gets the list of Virtual Instances for SAP solutions resources."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SapVirtualInstance>,
     #[doc = "Gets the value of next link."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2768,7 +2854,12 @@ pub struct SapNetWeaverProviderInstanceProperties {
     #[serde(rename = "sapInstanceNr", default, skip_serializing_if = "Option::is_none")]
     pub sap_instance_nr: Option<String>,
     #[doc = "Gets or sets the list of HostFile Entries"]
-    #[serde(rename = "sapHostFileEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sapHostFileEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sap_host_file_entries: Vec<String>,
     #[doc = "Gets or sets the SAP user name."]
     #[serde(rename = "sapUsername", default, skip_serializing_if = "Option::is_none")]
@@ -3046,22 +3137,43 @@ pub struct SkuDefinition {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kind: Option<String>,
     #[doc = "List of locations where this SKU is available."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub locations: Vec<String>,
     #[doc = "List of locations where this SKU is available."]
-    #[serde(rename = "locationInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "locationInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub location_info: Vec<SkuLocationAndZones>,
     #[doc = "If the SKU supports scale out/in then the capacity integer should be included. If scale out/in is not possible for the resource this may be omitted."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub capacity: Option<serde_json::Value>,
     #[doc = "The SKU costs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub costs: Vec<SkuCost>,
     #[doc = "The SKU capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
     #[doc = "The SKU restrictions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub restrictions: Vec<SkuRestriction>,
 }
 impl SkuDefinition {
@@ -3089,13 +3201,27 @@ pub struct SkuLocationAndZones {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub location: Option<String>,
     #[doc = "The availability zones of SKU location."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The availability zone details of the SKU location."]
-    #[serde(rename = "zoneDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "zoneDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zone_details: Vec<SkuZoneDetail>,
     #[doc = "The extended locations of SKU."]
-    #[serde(rename = "extendedLocations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "extendedLocations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extended_locations: Vec<String>,
     #[doc = "Type of the extended location."]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
@@ -3153,7 +3279,11 @@ pub struct SkuRestriction {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<sku_restriction::Type>,
     #[doc = "Restriction values."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<String>,
     #[doc = "The restriction information."]
     #[serde(rename = "restrictionInfo", default, skip_serializing_if = "Option::is_none")]
@@ -3260,10 +3390,18 @@ pub enum SkuTier {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkuZoneDetail {
     #[doc = "The physical zones."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub zones: Vec<String>,
     #[doc = "The capabilities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<SkuCapability>,
 }
 impl SkuZoneDetail {
@@ -3275,7 +3413,11 @@ impl SkuZoneDetail {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SkusListResult {
     #[doc = "List of SKUs supported by the resource provider"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SkuDefinition>,
     #[doc = "URL to get the next set of SKU list results (if there are any)."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3310,7 +3452,12 @@ impl SoftwareConfiguration {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SshConfiguration {
     #[doc = "The list of SSH public keys used to authenticate with linux based VMs."]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<SshPublicKey>,
 }
 impl SshConfiguration {
@@ -4082,7 +4229,12 @@ pub struct NetworkProfile {
     #[serde(rename = "frontEndPublicIpResourceId", default, skip_serializing_if = "Option::is_none")]
     pub front_end_public_ip_resource_id: Option<String>,
     #[doc = "List of outbound public IP resource IDs"]
-    #[serde(rename = "outboundPublicIpResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outboundPublicIpResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outbound_public_ip_resource_ids: Vec<String>,
 }
 impl NetworkProfile {
@@ -4194,10 +4346,20 @@ pub struct NodeProfile {
     #[serde(rename = "osDisk")]
     pub os_disk: DiskInfo,
     #[doc = "Data disks details. This property is not in use right now"]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DiskInfo>,
     #[doc = "VM/VMSS resource ARM Ids"]
-    #[serde(rename = "nodeResourceIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "nodeResourceIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_resource_ids: Vec<String>,
 }
 impl NodeProfile {
@@ -4507,7 +4669,11 @@ pub mod php_workload_resource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PhpWorkloadResourceList {
     #[doc = "List of resources in current page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PhpWorkloadResource>,
     #[doc = "Link to next page of resources"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -4878,7 +5044,11 @@ impl WordpressInstanceResource {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct WordpressInstanceResourceList {
     #[doc = "List of resources in current page"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<WordpressInstanceResource>,
     #[doc = "Link to next page of resources"]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/appconfiguration/src/package_2019_07/models.rs b/services/svc/appconfiguration/src/package_2019_07/models.rs
index 2cef4c7a81..a838be9598 100644
--- a/services/svc/appconfiguration/src/package_2019_07/models.rs
+++ b/services/svc/appconfiguration/src/package_2019_07/models.rs
@@ -47,7 +47,11 @@ impl Key {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<Key>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "@nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -92,7 +96,11 @@ impl KeyValue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyValueListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<KeyValue>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "@nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -123,7 +131,11 @@ impl Label {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LabelListResult {
     #[doc = "The collection value."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<Label>,
     #[doc = "The URI that can be used to request the next set of paged results."]
     #[serde(rename = "@nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/applicationinsights/src/v1/models.rs b/services/svc/applicationinsights/src/v1/models.rs
index 3a6a0fdcff..3158c58524 100644
--- a/services/svc/applicationinsights/src/v1/models.rs
+++ b/services/svc/applicationinsights/src/v1/models.rs
@@ -32,7 +32,11 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     #[doc = "Indicates resources which were responsible for the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
     #[serde(rename = "additionalProperties", default, skip_serializing_if = "Option::is_none")]
     pub additional_properties: Option<serde_json::Value>,
@@ -56,7 +60,11 @@ pub struct ErrorInfo {
     #[doc = "A human readable error message."]
     pub message: String,
     #[doc = "error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub innererror: Box<Option<ErrorInfo>>,
@@ -504,7 +512,12 @@ pub struct EventsExceptionDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "The parsed stack"]
-    #[serde(rename = "parsedStack", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parsedStack",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parsed_stack: Vec<EventsExceptionDetailsParsedStack>,
 }
 impl EventsExceptionDetail {
@@ -582,7 +595,11 @@ pub struct EventsExceptionInfo {
     #[serde(rename = "innermostAssembly", default, skip_serializing_if = "Option::is_none")]
     pub innermost_assembly: Option<String>,
     #[doc = "The details of the exception"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<EventsExceptionDetail>,
 }
 impl EventsExceptionInfo {
@@ -767,7 +784,12 @@ impl EventsRequestResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventsResult {
     #[doc = "OData messages for this response."]
-    #[serde(rename = "@ai.messages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "@ai.messages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ai_messages: Vec<ErrorInfo>,
     #[doc = "Events query result data."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -872,10 +894,19 @@ pub struct EventsResults {
     #[serde(rename = "@odata.context", default, skip_serializing_if = "Option::is_none")]
     pub odata_context: Option<String>,
     #[doc = "OData messages for this response."]
-    #[serde(rename = "@ai.messages", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "@ai.messages",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ai_messages: Vec<ErrorInfo>,
     #[doc = "Contents of the events query result."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventsResultData>,
 }
 impl EventsResults {
@@ -963,13 +994,26 @@ pub struct MetadataApplication {
     #[doc = "The Azure region of the Application Insights app."]
     pub region: String,
     #[doc = "The list of custom tables for the Application Insights app."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<String>,
     #[doc = "The list of stored functions on the Application Insights app"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub functions: Vec<String>,
     #[doc = "The list of table groups on the Application Insights app"]
-    #[serde(rename = "tableGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tableGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub table_groups: Vec<String>,
 }
 impl MetadataApplication {
@@ -1020,16 +1064,33 @@ impl MetadataFunction {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetadataResults {
     #[doc = "The list of groups of tables on the app."]
-    #[serde(rename = "tableGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tableGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub table_groups: Vec<MetadataTableGroup>,
     #[doc = "The list of tables and columns that comprise the schema of the app."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<MetadataTable>,
     #[doc = "The list of functions stored on the app."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub functions: Vec<MetadataFunction>,
     #[doc = "The list of Application Insights apps that were referenced in the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applications: Vec<MetadataApplication>,
 }
 impl MetadataResults {
@@ -1051,7 +1112,11 @@ pub struct MetadataTable {
     #[serde(rename = "timespanColumn", default, skip_serializing_if = "Option::is_none")]
     pub timespan_column: Option<String>,
     #[doc = "The list of columns defined on the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<serde_json::Value>,
 }
 impl MetadataTable {
@@ -1082,7 +1147,11 @@ pub struct MetadataTableGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The list of tables contained in the table group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<String>,
 }
 impl MetadataTableGroup {
@@ -1334,7 +1403,11 @@ pub struct MetricsResultInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub interval: Option<String>,
     #[doc = "Segmented metric data (if segmented)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub segments: Vec<MetricsSegmentInfo>,
 }
 impl MetricsResultInfo {
@@ -1354,7 +1427,11 @@ pub struct MetricsSegmentInfo {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub end: Option<String>,
     #[doc = "Segmented metric data (if further segmented)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub segments: Vec<MetricsSegmentInfo>,
 }
 impl MetricsSegmentInfo {
diff --git a/services/svc/attestation/src/package_2020_10_01/models.rs b/services/svc/attestation/src/package_2020_10_01/models.rs
index 7cb03dab48..83000a9962 100644
--- a/services/svc/attestation/src/package_2020_10_01/models.rs
+++ b/services/svc/attestation/src/package_2020_10_01/models.rs
@@ -310,7 +310,11 @@ pub struct JsonWebKey {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub x: Option<String>,
     #[doc = "The \"x5c\" (X.509 certificate chain) parameter contains a chain of one\nor more PKIX certificates [RFC5280].  The certificate chain is\nrepresented as a JSON array of certificate value strings.  Each\nstring in the array is a base64-encoded (Section 4 of [RFC4648] --\nnot base64url-encoded) DER [ITU.X690.1994] PKIX certificate value.\nThe PKIX certificate containing the key value MUST be the first\ncertificate."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub x5c: Vec<String>,
     #[doc = "Y coordinate for the Elliptic Curve point"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -342,7 +346,11 @@ impl JsonWebKey {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JsonWebKeySet {
     #[doc = "The value of the \"keys\" parameter is an array of JWK values.  By\ndefault, the order of the JWK values within the array does not imply\nan order of preference among them, although applications of JWK Sets\ncan choose to assign a meaning to the order for their purposes, if\ndesired."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<JsonWebKey>,
 }
 impl JsonWebKeySet {
diff --git a/services/svc/batch/src/package_2019_08_10_0/models.rs b/services/svc/batch/src/package_2019_08_10_0/models.rs
index f75bb0ea4e..fd53c0765a 100644
--- a/services/svc/batch/src/package_2019_08_10_0/models.rs
+++ b/services/svc/batch/src/package_2019_08_10_0/models.rs
@@ -6,7 +6,11 @@ use serde::{Deserialize, Serialize, Serializer};
 use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountListSupportedImagesResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImageInformation>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -35,7 +39,11 @@ impl AffinityInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationSummary>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -86,7 +94,11 @@ impl ApplicationSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthenticationTokenSettings {
     #[doc = "The authentication token grants access to a limited set of Batch service operations. Currently the only supported value for the access property is 'job', which grants access to all operations related to the Job which contains the Task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access: Vec<String>,
 }
 impl AuthenticationTokenSettings {
@@ -152,7 +164,11 @@ pub struct AutoScaleRunError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<NameValuePair>,
 }
 impl AutoScaleRunError {
@@ -257,7 +273,11 @@ pub struct BatchError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<ErrorMessage>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<BatchErrorDetail>,
 }
 impl azure_core::Continuable for BatchError {
@@ -393,7 +413,11 @@ pub mod certificate_add_parameter {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Certificate>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -426,7 +450,11 @@ pub struct CertificateReference {
     #[serde(rename = "storeName", default, skip_serializing_if = "Option::is_none")]
     pub store_name: Option<String>,
     #[doc = "You can specify more than one visibility in this collection. The default is all Accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub visibility: Vec<String>,
 }
 impl CertificateReference {
@@ -512,7 +540,12 @@ pub struct CloudJob {
     #[serde(rename = "jobReleaseTask", default, skip_serializing_if = "Option::is_none")]
     pub job_release_task: Option<JobReleaseTask>,
     #[doc = "Individual Tasks can override an environment setting specified here by specifying the same setting name with a different value."]
-    #[serde(rename = "commonEnvironmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonEnvironmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "poolInfo", default, skip_serializing_if = "Option::is_none")]
     pub pool_info: Option<PoolInformation>,
@@ -534,7 +567,11 @@ pub struct CloudJob {
     #[serde(rename = "networkConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub network_configuration: Option<JobNetworkConfiguration>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(rename = "executionInfo", default, skip_serializing_if = "Option::is_none")]
     pub execution_info: Option<JobExecutionInformation>,
@@ -548,7 +585,11 @@ impl CloudJob {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudJobListPreparationAndReleaseTaskStatusResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobPreparationAndReleaseTaskExecutionInformation>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -566,7 +607,11 @@ impl CloudJobListPreparationAndReleaseTaskStatusResult {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudJobListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudJob>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -623,7 +668,11 @@ pub struct CloudJobSchedule {
     #[serde(rename = "executionInfo", default, skip_serializing_if = "Option::is_none")]
     pub execution_info: Option<JobScheduleExecutionInformation>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub stats: Option<JobScheduleStatistics>,
@@ -635,7 +684,11 @@ impl CloudJobSchedule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudJobScheduleListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudJobSchedule>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -697,7 +750,12 @@ pub struct CloudPool {
     #[serde(rename = "resizeTimeout", default, skip_serializing_if = "Option::is_none")]
     pub resize_timeout: Option<String>,
     #[doc = "This property is set only if one or more errors occurred during the last Pool resize, and only when the Pool allocationState is Steady."]
-    #[serde(rename = "resizeErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resizeErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resize_errors: Vec<ResizeError>,
     #[serde(rename = "currentDedicatedNodes", default, skip_serializing_if = "Option::is_none")]
     pub current_dedicated_nodes: Option<i32>,
@@ -729,27 +787,56 @@ pub struct CloudPool {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. There is a maximum of 10 Package references on any given Pool."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, Pool creation will fail."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
     #[doc = "The default value is 1. The maximum value is the smaller of 4 times the number of cores of the vmSize of the Pool or 256."]
     #[serde(rename = "maxTasksPerNode", default, skip_serializing_if = "Option::is_none")]
     pub max_tasks_per_node: Option<i32>,
     #[serde(rename = "taskSchedulingPolicy", default, skip_serializing_if = "Option::is_none")]
     pub task_scheduling_policy: Option<TaskSchedulingPolicy>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub stats: Option<PoolStatistics>,
     #[doc = "This supports Azure Files, NFS, CIFS/SMB, and Blobfuse."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl CloudPool {
@@ -778,7 +865,11 @@ pub mod cloud_pool {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudPoolListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudPool>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -855,12 +946,27 @@ pub struct CloudTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "For multi-instance Tasks, the resource files will only be downloaded to the Compute Node on which the primary Task is executed. There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
     #[doc = "For multi-instance Tasks, the files will only be uploaded from the Compute Node on which the primary Task is executed."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "affinityInfo", default, skip_serializing_if = "Option::is_none")]
     pub affinity_info: Option<AffinityInformation>,
@@ -881,7 +987,12 @@ pub struct CloudTask {
     #[serde(rename = "dependsOn", default, skip_serializing_if = "Option::is_none")]
     pub depends_on: Option<TaskDependencies>,
     #[doc = "Application packages are downloaded and deployed to a shared directory, not the Task working directory. Therefore, if a referenced package is already on the Node, and is up to date, then it is not re-downloaded; the existing copy on the Compute Node is used. If a referenced Package cannot be installed, for example because the package has been deleted or because download failed, the Task fails."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[serde(rename = "authenticationTokenSettings", default, skip_serializing_if = "Option::is_none")]
     pub authentication_token_settings: Option<AuthenticationTokenSettings>,
@@ -893,7 +1004,11 @@ impl CloudTask {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudTaskListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudTask>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -911,7 +1026,11 @@ impl CloudTaskListResult {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudTaskListSubtasksResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubtaskInformation>,
 }
 impl CloudTaskListSubtasksResult {
@@ -964,7 +1083,12 @@ pub struct ComputeNode {
     #[serde(rename = "totalTasksSucceeded", default, skip_serializing_if = "Option::is_none")]
     pub total_tasks_succeeded: Option<i32>,
     #[doc = "This property is present only if at least one Task has run on this Compute Node since it was assigned to the Pool."]
-    #[serde(rename = "recentTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recentTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recent_tasks: Vec<TaskInformation>,
     #[doc = "Batch will retry Tasks when a recovery operation is triggered on a Node. Examples of recovery operations include (but are not limited to) when an unhealthy Node is rebooted or a Compute Node disappeared due to host failure. Retries due to recovery operations are independent of and are not counted against the maxTaskRetryCount. Even if the maxTaskRetryCount is 0, an internal retry due to a recovery operation may occur. Because of this, all Tasks should be idempotent. This means Tasks need to tolerate being interrupted and restarted without causing any corruption or duplicate data. The best practice for long running Tasks is to use some form of checkpointing. In some cases the StartTask may be re-run even though the Compute Node was not rebooted. Special care should be taken to avoid StartTasks which create breakaway process or install/launch services from the StartTask working directory, as this will block Batch from being able to re-run the StartTask."]
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
@@ -972,9 +1096,18 @@ pub struct ComputeNode {
     #[serde(rename = "startTaskInfo", default, skip_serializing_if = "Option::is_none")]
     pub start_task_info: Option<StartTaskInformation>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ComputeNodeError>,
     #[serde(rename = "isDedicated", default, skip_serializing_if = "Option::is_none")]
     pub is_dedicated: Option<bool>,
@@ -1057,7 +1190,12 @@ pub struct ComputeNodeError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<NameValuePair>,
 }
 impl ComputeNodeError {
@@ -1102,7 +1240,11 @@ impl ComputeNodeInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeNodeListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputeNode>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -1150,10 +1292,20 @@ pub struct ContainerConfiguration {
     #[serde(rename = "type", deserialize_with = "case_insensitive_deserialize")]
     pub type_: container_configuration::Type,
     #[doc = "This is the full Image reference, as would be specified to \"docker pull\". An Image will be sourced from the default Docker registry unless the Image is fully qualified with an alternative registry."]
-    #[serde(rename = "containerImageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerImageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_image_names: Vec<String>,
     #[doc = "If any Images must be downloaded from a private registry which requires credentials, then those credentials must be provided here."]
-    #[serde(rename = "containerRegistries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerRegistries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_registries: Vec<ContainerRegistry>,
 }
 impl ContainerConfiguration {
@@ -1228,7 +1380,11 @@ pub struct DeleteCertificateError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "This list includes details such as the active Pools and Compute Nodes referencing this Certificate. However, if a large number of resources reference the Certificate, the list contains only about the first hundred."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<NameValuePair>,
 }
 impl DeleteCertificateError {
@@ -1298,9 +1454,19 @@ impl ExitCodeRangeMapping {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExitConditions {
-    #[serde(rename = "exitCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exitCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exit_codes: Vec<ExitCodeMapping>,
-    #[serde(rename = "exitCodeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exitCodeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exit_code_ranges: Vec<ExitCodeRangeMapping>,
     #[serde(rename = "preProcessingError", default, skip_serializing_if = "Option::is_none")]
     pub pre_processing_error: Option<ExitOptions>,
@@ -1394,7 +1560,11 @@ pub struct ImageInformation {
     #[serde(rename = "osType", deserialize_with = "case_insensitive_deserialize")]
     pub os_type: image_information::OsType,
     #[doc = "Not every capability of the Image is listed. Capabilities in this list are considered of special interest and are generally related to integration with other features in the Azure Batch service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<String>,
     #[serde(rename = "batchSupportEndOfLife", default, with = "azure_core::date::rfc3339::option")]
     pub batch_support_end_of_life: Option<time::OffsetDateTime>,
@@ -1514,7 +1684,12 @@ pub struct InboundNatPool {
     #[serde(rename = "frontendPortRangeEnd")]
     pub frontend_port_range_end: i32,
     #[doc = "The maximum number of rules that can be specified across all the endpoints on a Batch Pool is 25. If no network security group rules are specified, a default rule will be created to allow inbound access to the specified backendPort. If the maximum number of network security group rules is exceeded the request fails with HTTP status code 400."]
-    #[serde(rename = "networkSecurityGroupRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityGroupRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_group_rules: Vec<NetworkSecurityGroupRule>,
 }
 impl InboundNatPool {
@@ -1557,7 +1732,12 @@ pub struct JobAddParameter {
     #[serde(rename = "jobReleaseTask", default, skip_serializing_if = "Option::is_none")]
     pub job_release_task: Option<JobReleaseTask>,
     #[doc = "Individual Tasks can override an environment setting specified here by specifying the same setting name with a different value."]
-    #[serde(rename = "commonEnvironmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonEnvironmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "poolInfo")]
     pub pool_info: PoolInformation,
@@ -1577,7 +1757,11 @@ pub struct JobAddParameter {
     )]
     pub on_task_failure: Option<OnTaskFailure>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(rename = "usesTaskDependencies", default, skip_serializing_if = "Option::is_none")]
     pub uses_task_dependencies: Option<bool>,
@@ -1682,12 +1866,27 @@ pub struct JobManagerTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory. There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
     #[doc = "For multi-instance Tasks, the files will only be uploaded from the Compute Node on which the primary Task is executed."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub constraints: Option<TaskConstraints>,
@@ -1701,7 +1900,12 @@ pub struct JobManagerTask {
     #[serde(rename = "runExclusive", default, skip_serializing_if = "Option::is_none")]
     pub run_exclusive: Option<bool>,
     #[doc = "Application Packages are downloaded and deployed to a shared directory, not the Task working directory. Therefore, if a referenced Application Package is already on the Compute Node, and is up to date, then it is not re-downloaded; the existing copy on the Compute Node is used. If a referenced Application Package cannot be installed, for example because the package has been deleted or because download failed, the Task fails."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[serde(rename = "authenticationTokenSettings", default, skip_serializing_if = "Option::is_none")]
     pub authentication_token_settings: Option<AuthenticationTokenSettings>,
@@ -1757,7 +1961,11 @@ pub struct JobPatchParameter {
     #[serde(rename = "poolInfo", default, skip_serializing_if = "Option::is_none")]
     pub pool_info: Option<PoolInformation>,
     #[doc = "If omitted, the existing Job metadata is left unchanged."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobPatchParameter {
@@ -1795,9 +2003,19 @@ pub struct JobPreparationTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory.  There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub constraints: Option<TaskConstraints>,
@@ -1899,9 +2117,19 @@ pub struct JobReleaseTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "maxWallClockTime", default, skip_serializing_if = "Option::is_none")]
     pub max_wall_clock_time: Option<String>,
@@ -1990,7 +2218,11 @@ pub struct JobScheduleAddParameter {
     #[serde(rename = "jobSpecification")]
     pub job_specification: JobSpecification,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobScheduleAddParameter {
@@ -2027,7 +2259,11 @@ pub struct JobSchedulePatchParameter {
     #[serde(rename = "jobSpecification", default, skip_serializing_if = "Option::is_none")]
     pub job_specification: Option<JobSpecification>,
     #[doc = "If you do not specify this element, existing metadata is left unchanged."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobSchedulePatchParameter {
@@ -2121,7 +2357,11 @@ pub struct JobScheduleUpdateParameter {
     #[serde(rename = "jobSpecification")]
     pub job_specification: JobSpecification,
     #[doc = "If you do not specify this element, it takes the default value of an empty list; in effect, any existing metadata is deleted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobScheduleUpdateParameter {
@@ -2141,7 +2381,11 @@ pub struct JobSchedulingError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<NameValuePair>,
 }
 impl JobSchedulingError {
@@ -2193,12 +2437,21 @@ pub struct JobSpecification {
     #[serde(rename = "jobReleaseTask", default, skip_serializing_if = "Option::is_none")]
     pub job_release_task: Option<JobReleaseTask>,
     #[doc = "Individual Tasks can override an environment setting specified here by specifying the same setting name with a different value."]
-    #[serde(rename = "commonEnvironmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonEnvironmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "poolInfo")]
     pub pool_info: PoolInformation,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobSpecification {
@@ -2326,7 +2579,11 @@ pub struct JobUpdateParameter {
     #[serde(rename = "poolInfo")]
     pub pool_info: PoolInformation,
     #[doc = "If omitted, it takes the default value of an empty list; in effect, any existing metadata is deleted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(
         rename = "onAllTasksComplete",
@@ -2401,7 +2658,12 @@ pub struct MultiInstanceSettings {
     #[serde(rename = "coordinationCommandLine")]
     pub coordination_command_line: String,
     #[doc = "The difference between common resource files and Task resource files is that common resource files are downloaded for all subtasks including the primary, whereas Task resource files are downloaded only for the primary. Also note that these resource files are not downloaded to the Task working directory, but instead are downloaded to the Task root directory (one directory above the working directory).  There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "commonResourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonResourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_resource_files: Vec<ResourceFile>,
 }
 impl MultiInstanceSettings {
@@ -2460,7 +2722,12 @@ pub struct NetworkConfiguration {
     #[serde(rename = "endpointConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub endpoint_configuration: Option<PoolEndpointConfiguration>,
     #[doc = "The number of IPs specified here limits the maximum size of the Pool - 50 dedicated nodes or 20 low-priority nodes can be allocated for each public IP. For example, a pool needing 150 dedicated VMs would need at least 3 public IPs specified. Each element of this collection is of the form: /subscriptions/{subscription}/resourceGroups/{group}/providers/Microsoft.Network/publicIPAddresses/{ip}."]
-    #[serde(rename = "publicIPs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicIPs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_i_ps: Vec<String>,
 }
 impl NetworkConfiguration {
@@ -2488,7 +2755,12 @@ pub struct NetworkSecurityGroupRule {
     #[serde(rename = "sourceAddressPrefix")]
     pub source_address_prefix: String,
     #[doc = "Valid values are '*' (for all ports 0 - 65535), a specific port (i.e. 22), or a port range (i.e. 100-200). The ports must be in the range of 0 to 65535. Each entry in this collection must not overlap any other entry (either a range or an individual port). If any other values are provided the request fails with HTTP status code 400. The default value is '*'."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
 }
 impl NetworkSecurityGroupRule {
@@ -2627,7 +2899,11 @@ impl NodeFile {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeFileListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeFile>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -2865,26 +3141,55 @@ pub struct PoolAddParameter {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. There is a maximum of 10 Package references on any given Pool."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, Pool creation will fail."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
     #[doc = "The default value is 1. The maximum value is the smaller of 4 times the number of cores of the vmSize of the Pool or 256."]
     #[serde(rename = "maxTasksPerNode", default, skip_serializing_if = "Option::is_none")]
     pub max_tasks_per_node: Option<i32>,
     #[serde(rename = "taskSchedulingPolicy", default, skip_serializing_if = "Option::is_none")]
     pub task_scheduling_policy: Option<TaskSchedulingPolicy>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[doc = "Mount the storage using Azure fileshare, NFS, CIFS or Blobfuse based file system."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl PoolAddParameter {
@@ -2966,7 +3271,11 @@ impl PoolInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PoolListUsageMetricsResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PoolUsageMetrics>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -3003,7 +3312,11 @@ impl PoolNodeCounts {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PoolNodeCountsListResult {
     #[doc = "A list of Compute Node counts by Pool."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PoolNodeCounts>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -3025,13 +3338,27 @@ pub struct PoolPatchParameter {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "If this element is present, it replaces any existing Certificate references configured on the Pool. If omitted, any existing Certificate references are left unchanged. For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. If this element is present, it replaces any existing Package references. If you specify an empty collection, then all Package references are removed from the Pool. If omitted, any existing Package references are left unchanged."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "If this element is present, it replaces any existing metadata configured on the Pool. If you specify an empty collection, any metadata is removed from the Pool. If omitted, any existing metadata is left unchanged."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl PoolPatchParameter {
@@ -3107,21 +3434,50 @@ pub struct PoolSpecification {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. There is a maximum of 10 Package references on any given Pool."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, Pool creation will fail. The permitted licenses available on the Pool are 'maya', 'vray', '3dsmax', 'arnold'. An additional charge applies for each application license added to the Pool."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[doc = "This supports Azure Files, NFS, CIFS/SMB, and Blobfuse."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl PoolSpecification {
@@ -3251,7 +3607,11 @@ pub struct ResizeError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<NameValuePair>,
 }
 impl ResizeError {
@@ -3376,9 +3736,19 @@ pub struct StartTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[doc = "Specify either the userName or autoUser property, but not both."]
     #[serde(rename = "userIdentity", default, skip_serializing_if = "Option::is_none")]
@@ -3534,7 +3904,11 @@ impl TaskAddCollectionParameter {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskAddCollectionResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TaskAddResult>,
 }
 impl TaskAddCollectionResult {
@@ -3558,12 +3932,27 @@ pub struct TaskAddParameter {
     #[serde(rename = "exitConditions", default, skip_serializing_if = "Option::is_none")]
     pub exit_conditions: Option<ExitConditions>,
     #[doc = "For multi-instance Tasks, the resource files will only be downloaded to the Compute Node on which the primary Task is executed. There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
     #[doc = "For multi-instance Tasks, the files will only be uploaded from the Compute Node on which the primary Task is executed."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "affinityInfo", default, skip_serializing_if = "Option::is_none")]
     pub affinity_info: Option<AffinityInformation>,
@@ -3578,7 +3967,12 @@ pub struct TaskAddParameter {
     #[serde(rename = "dependsOn", default, skip_serializing_if = "Option::is_none")]
     pub depends_on: Option<TaskDependencies>,
     #[doc = "Application packages are downloaded and deployed to a shared directory, not the Task working directory. Therefore, if a referenced package is already on the Node, and is up to date, then it is not re-downloaded; the existing copy on the Compute Node is used. If a referenced Package cannot be installed, for example because the package has been deleted or because download failed, the Task fails."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[serde(rename = "authenticationTokenSettings", default, skip_serializing_if = "Option::is_none")]
     pub authentication_token_settings: Option<AuthenticationTokenSettings>,
@@ -3739,9 +4133,19 @@ impl TaskCounts {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskDependencies {
     #[doc = "The taskIds collection is limited to 64000 characters total (i.e. the combined length of all Task IDs). If the taskIds collection exceeds the maximum length, the Add Task request fails with error code TaskDependencyListTooLong. In this case consider using Task ID ranges instead."]
-    #[serde(rename = "taskIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "taskIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub task_ids: Vec<String>,
-    #[serde(rename = "taskIdRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "taskIdRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub task_id_ranges: Vec<TaskIdRange>,
 }
 impl TaskDependencies {
@@ -3814,7 +4218,11 @@ pub struct TaskFailureInformation {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<NameValuePair>,
 }
 impl TaskFailureInformation {
@@ -4068,7 +4476,12 @@ pub struct VirtualMachineConfiguration {
     #[serde(rename = "windowsConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub windows_configuration: Option<WindowsConfiguration>,
     #[doc = "This property must be specified if the Compute Nodes in the Pool need to have empty data disks attached to them. This cannot be updated. Each Compute Node gets its own disk (the disk is not a file share). Existing disks cannot be attached, each attached disk is empty. When the Compute Node is removed from the Pool, the disk and all data associated with it is also deleted. The disk is not formatted after being attached, it must be formatted before use - for more information see https://docs.microsoft.com/en-us/azure/virtual-machines/linux/classic/attach-disk#initialize-a-new-data-disk-in-linux and https://docs.microsoft.com/en-us/azure/virtual-machines/windows/attach-disk-ps#add-an-empty-data-disk-to-a-virtual-machine."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
     #[doc = "This only applies to Images that contain the Windows operating system, and should only be used when you hold valid on-premises licenses for the Compute Nodes which will be deployed. If omitted, no on-premises licensing discount is applied. Values are:\n\n Windows_Server - The on-premises license is for Windows Server.\n Windows_Client - The on-premises license is for Windows Client.\n"]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/batch/src/package_2020_03_11_0/models.rs b/services/svc/batch/src/package_2020_03_11_0/models.rs
index f422fcdc03..abc8ad55bb 100644
--- a/services/svc/batch/src/package_2020_03_11_0/models.rs
+++ b/services/svc/batch/src/package_2020_03_11_0/models.rs
@@ -6,7 +6,11 @@ use serde::{Deserialize, Serialize, Serializer};
 use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountListSupportedImagesResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImageInformation>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -35,7 +39,11 @@ impl AffinityInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationSummary>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -86,7 +94,11 @@ impl ApplicationSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthenticationTokenSettings {
     #[doc = "The authentication token grants access to a limited set of Batch service operations. Currently the only supported value for the access property is 'job', which grants access to all operations related to the Job which contains the Task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access: Vec<String>,
 }
 impl AuthenticationTokenSettings {
@@ -152,7 +164,11 @@ pub struct AutoScaleRunError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<NameValuePair>,
 }
 impl AutoScaleRunError {
@@ -257,7 +273,11 @@ pub struct BatchError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<ErrorMessage>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<BatchErrorDetail>,
 }
 impl azure_core::Continuable for BatchError {
@@ -393,7 +413,11 @@ pub mod certificate_add_parameter {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Certificate>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -426,7 +450,11 @@ pub struct CertificateReference {
     #[serde(rename = "storeName", default, skip_serializing_if = "Option::is_none")]
     pub store_name: Option<String>,
     #[doc = "You can specify more than one visibility in this collection. The default is all Accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub visibility: Vec<String>,
 }
 impl CertificateReference {
@@ -512,7 +540,12 @@ pub struct CloudJob {
     #[serde(rename = "jobReleaseTask", default, skip_serializing_if = "Option::is_none")]
     pub job_release_task: Option<JobReleaseTask>,
     #[doc = "Individual Tasks can override an environment setting specified here by specifying the same setting name with a different value."]
-    #[serde(rename = "commonEnvironmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonEnvironmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "poolInfo", default, skip_serializing_if = "Option::is_none")]
     pub pool_info: Option<PoolInformation>,
@@ -534,7 +567,11 @@ pub struct CloudJob {
     #[serde(rename = "networkConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub network_configuration: Option<JobNetworkConfiguration>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(rename = "executionInfo", default, skip_serializing_if = "Option::is_none")]
     pub execution_info: Option<JobExecutionInformation>,
@@ -548,7 +585,11 @@ impl CloudJob {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudJobListPreparationAndReleaseTaskStatusResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobPreparationAndReleaseTaskExecutionInformation>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -566,7 +607,11 @@ impl CloudJobListPreparationAndReleaseTaskStatusResult {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudJobListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudJob>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -623,7 +668,11 @@ pub struct CloudJobSchedule {
     #[serde(rename = "executionInfo", default, skip_serializing_if = "Option::is_none")]
     pub execution_info: Option<JobScheduleExecutionInformation>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub stats: Option<JobScheduleStatistics>,
@@ -635,7 +684,11 @@ impl CloudJobSchedule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudJobScheduleListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudJobSchedule>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -697,7 +750,12 @@ pub struct CloudPool {
     #[serde(rename = "resizeTimeout", default, skip_serializing_if = "Option::is_none")]
     pub resize_timeout: Option<String>,
     #[doc = "This property is set only if one or more errors occurred during the last Pool resize, and only when the Pool allocationState is Steady."]
-    #[serde(rename = "resizeErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resizeErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resize_errors: Vec<ResizeError>,
     #[serde(rename = "currentDedicatedNodes", default, skip_serializing_if = "Option::is_none")]
     pub current_dedicated_nodes: Option<i32>,
@@ -729,27 +787,56 @@ pub struct CloudPool {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. There is a maximum of 10 Package references on any given Pool."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, Pool creation will fail."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
     #[doc = "The default value is 1. The maximum value is the smaller of 4 times the number of cores of the vmSize of the Pool or 256."]
     #[serde(rename = "maxTasksPerNode", default, skip_serializing_if = "Option::is_none")]
     pub max_tasks_per_node: Option<i32>,
     #[serde(rename = "taskSchedulingPolicy", default, skip_serializing_if = "Option::is_none")]
     pub task_scheduling_policy: Option<TaskSchedulingPolicy>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub stats: Option<PoolStatistics>,
     #[doc = "This supports Azure Files, NFS, CIFS/SMB, and Blobfuse."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl CloudPool {
@@ -778,7 +865,11 @@ pub mod cloud_pool {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudPoolListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudPool>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -855,12 +946,27 @@ pub struct CloudTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "For multi-instance Tasks, the resource files will only be downloaded to the Compute Node on which the primary Task is executed. There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
     #[doc = "For multi-instance Tasks, the files will only be uploaded from the Compute Node on which the primary Task is executed."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "affinityInfo", default, skip_serializing_if = "Option::is_none")]
     pub affinity_info: Option<AffinityInformation>,
@@ -881,7 +987,12 @@ pub struct CloudTask {
     #[serde(rename = "dependsOn", default, skip_serializing_if = "Option::is_none")]
     pub depends_on: Option<TaskDependencies>,
     #[doc = "Application packages are downloaded and deployed to a shared directory, not the Task working directory. Therefore, if a referenced package is already on the Node, and is up to date, then it is not re-downloaded; the existing copy on the Compute Node is used. If a referenced Package cannot be installed, for example because the package has been deleted or because download failed, the Task fails."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[serde(rename = "authenticationTokenSettings", default, skip_serializing_if = "Option::is_none")]
     pub authentication_token_settings: Option<AuthenticationTokenSettings>,
@@ -893,7 +1004,11 @@ impl CloudTask {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudTaskListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudTask>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -911,7 +1026,11 @@ impl CloudTaskListResult {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudTaskListSubtasksResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubtaskInformation>,
 }
 impl CloudTaskListSubtasksResult {
@@ -964,7 +1083,12 @@ pub struct ComputeNode {
     #[serde(rename = "totalTasksSucceeded", default, skip_serializing_if = "Option::is_none")]
     pub total_tasks_succeeded: Option<i32>,
     #[doc = "This property is present only if at least one Task has run on this Compute Node since it was assigned to the Pool."]
-    #[serde(rename = "recentTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recentTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recent_tasks: Vec<TaskInformation>,
     #[doc = "Batch will retry Tasks when a recovery operation is triggered on a Node. Examples of recovery operations include (but are not limited to) when an unhealthy Node is rebooted or a Compute Node disappeared due to host failure. Retries due to recovery operations are independent of and are not counted against the maxTaskRetryCount. Even if the maxTaskRetryCount is 0, an internal retry due to a recovery operation may occur. Because of this, all Tasks should be idempotent. This means Tasks need to tolerate being interrupted and restarted without causing any corruption or duplicate data. The best practice for long running Tasks is to use some form of checkpointing. In some cases the StartTask may be re-run even though the Compute Node was not rebooted. Special care should be taken to avoid StartTasks which create breakaway process or install/launch services from the StartTask working directory, as this will block Batch from being able to re-run the StartTask."]
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
@@ -972,9 +1096,18 @@ pub struct ComputeNode {
     #[serde(rename = "startTaskInfo", default, skip_serializing_if = "Option::is_none")]
     pub start_task_info: Option<StartTaskInformation>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ComputeNodeError>,
     #[serde(rename = "isDedicated", default, skip_serializing_if = "Option::is_none")]
     pub is_dedicated: Option<bool>,
@@ -1057,7 +1190,12 @@ pub struct ComputeNodeError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<NameValuePair>,
 }
 impl ComputeNodeError {
@@ -1102,7 +1240,11 @@ impl ComputeNodeInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeNodeListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputeNode>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -1150,10 +1292,20 @@ pub struct ContainerConfiguration {
     #[serde(rename = "type", deserialize_with = "case_insensitive_deserialize")]
     pub type_: container_configuration::Type,
     #[doc = "This is the full Image reference, as would be specified to \"docker pull\". An Image will be sourced from the default Docker registry unless the Image is fully qualified with an alternative registry."]
-    #[serde(rename = "containerImageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerImageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_image_names: Vec<String>,
     #[doc = "If any Images must be downloaded from a private registry which requires credentials, then those credentials must be provided here."]
-    #[serde(rename = "containerRegistries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerRegistries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_registries: Vec<ContainerRegistry>,
 }
 impl ContainerConfiguration {
@@ -1228,7 +1380,11 @@ pub struct DeleteCertificateError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "This list includes details such as the active Pools and Compute Nodes referencing this Certificate. However, if a large number of resources reference the Certificate, the list contains only about the first hundred."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<NameValuePair>,
 }
 impl DeleteCertificateError {
@@ -1240,7 +1396,11 @@ impl DeleteCertificateError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskEncryptionConfiguration {
     #[doc = "If omitted, no disks on the compute nodes in the pool will be encrypted. On Linux pool, only \"TemporaryDisk\" is supported; on Windows pool, \"OsDisk\" and \"TemporaryDisk\" must be specified."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<String>,
 }
 impl DiskEncryptionConfiguration {
@@ -1310,9 +1470,19 @@ impl ExitCodeRangeMapping {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExitConditions {
-    #[serde(rename = "exitCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exitCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exit_codes: Vec<ExitCodeMapping>,
-    #[serde(rename = "exitCodeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exitCodeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exit_code_ranges: Vec<ExitCodeRangeMapping>,
     #[serde(rename = "preProcessingError", default, skip_serializing_if = "Option::is_none")]
     pub pre_processing_error: Option<ExitOptions>,
@@ -1415,7 +1585,11 @@ pub struct ImageInformation {
     #[serde(rename = "osType", deserialize_with = "case_insensitive_deserialize")]
     pub os_type: image_information::OsType,
     #[doc = "Not every capability of the Image is listed. Capabilities in this list are considered of special interest and are generally related to integration with other features in the Azure Batch service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<String>,
     #[serde(rename = "batchSupportEndOfLife", default, with = "azure_core::date::rfc3339::option")]
     pub batch_support_end_of_life: Option<time::OffsetDateTime>,
@@ -1535,7 +1709,12 @@ pub struct InboundNatPool {
     #[serde(rename = "frontendPortRangeEnd")]
     pub frontend_port_range_end: i32,
     #[doc = "The maximum number of rules that can be specified across all the endpoints on a Batch Pool is 25. If no network security group rules are specified, a default rule will be created to allow inbound access to the specified backendPort. If the maximum number of network security group rules is exceeded the request fails with HTTP status code 400."]
-    #[serde(rename = "networkSecurityGroupRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityGroupRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_group_rules: Vec<NetworkSecurityGroupRule>,
 }
 impl InboundNatPool {
@@ -1578,7 +1757,12 @@ pub struct JobAddParameter {
     #[serde(rename = "jobReleaseTask", default, skip_serializing_if = "Option::is_none")]
     pub job_release_task: Option<JobReleaseTask>,
     #[doc = "Individual Tasks can override an environment setting specified here by specifying the same setting name with a different value."]
-    #[serde(rename = "commonEnvironmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonEnvironmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "poolInfo")]
     pub pool_info: PoolInformation,
@@ -1598,7 +1782,11 @@ pub struct JobAddParameter {
     )]
     pub on_task_failure: Option<OnTaskFailure>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(rename = "usesTaskDependencies", default, skip_serializing_if = "Option::is_none")]
     pub uses_task_dependencies: Option<bool>,
@@ -1703,12 +1891,27 @@ pub struct JobManagerTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory. There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
     #[doc = "For multi-instance Tasks, the files will only be uploaded from the Compute Node on which the primary Task is executed."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub constraints: Option<TaskConstraints>,
@@ -1722,7 +1925,12 @@ pub struct JobManagerTask {
     #[serde(rename = "runExclusive", default, skip_serializing_if = "Option::is_none")]
     pub run_exclusive: Option<bool>,
     #[doc = "Application Packages are downloaded and deployed to a shared directory, not the Task working directory. Therefore, if a referenced Application Package is already on the Compute Node, and is up to date, then it is not re-downloaded; the existing copy on the Compute Node is used. If a referenced Application Package cannot be installed, for example because the package has been deleted or because download failed, the Task fails."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[serde(rename = "authenticationTokenSettings", default, skip_serializing_if = "Option::is_none")]
     pub authentication_token_settings: Option<AuthenticationTokenSettings>,
@@ -1778,7 +1986,11 @@ pub struct JobPatchParameter {
     #[serde(rename = "poolInfo", default, skip_serializing_if = "Option::is_none")]
     pub pool_info: Option<PoolInformation>,
     #[doc = "If omitted, the existing Job metadata is left unchanged."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobPatchParameter {
@@ -1816,9 +2028,19 @@ pub struct JobPreparationTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory.  There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub constraints: Option<TaskConstraints>,
@@ -1920,9 +2142,19 @@ pub struct JobReleaseTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "maxWallClockTime", default, skip_serializing_if = "Option::is_none")]
     pub max_wall_clock_time: Option<String>,
@@ -2011,7 +2243,11 @@ pub struct JobScheduleAddParameter {
     #[serde(rename = "jobSpecification")]
     pub job_specification: JobSpecification,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobScheduleAddParameter {
@@ -2048,7 +2284,11 @@ pub struct JobSchedulePatchParameter {
     #[serde(rename = "jobSpecification", default, skip_serializing_if = "Option::is_none")]
     pub job_specification: Option<JobSpecification>,
     #[doc = "If you do not specify this element, existing metadata is left unchanged."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobSchedulePatchParameter {
@@ -2142,7 +2382,11 @@ pub struct JobScheduleUpdateParameter {
     #[serde(rename = "jobSpecification")]
     pub job_specification: JobSpecification,
     #[doc = "If you do not specify this element, it takes the default value of an empty list; in effect, any existing metadata is deleted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobScheduleUpdateParameter {
@@ -2162,7 +2406,11 @@ pub struct JobSchedulingError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<NameValuePair>,
 }
 impl JobSchedulingError {
@@ -2214,12 +2462,21 @@ pub struct JobSpecification {
     #[serde(rename = "jobReleaseTask", default, skip_serializing_if = "Option::is_none")]
     pub job_release_task: Option<JobReleaseTask>,
     #[doc = "Individual Tasks can override an environment setting specified here by specifying the same setting name with a different value."]
-    #[serde(rename = "commonEnvironmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonEnvironmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "poolInfo")]
     pub pool_info: PoolInformation,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobSpecification {
@@ -2347,7 +2604,11 @@ pub struct JobUpdateParameter {
     #[serde(rename = "poolInfo")]
     pub pool_info: PoolInformation,
     #[doc = "If omitted, it takes the default value of an empty list; in effect, any existing metadata is deleted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(
         rename = "onAllTasksComplete",
@@ -2422,7 +2683,12 @@ pub struct MultiInstanceSettings {
     #[serde(rename = "coordinationCommandLine")]
     pub coordination_command_line: String,
     #[doc = "The difference between common resource files and Task resource files is that common resource files are downloaded for all subtasks including the primary, whereas Task resource files are downloaded only for the primary. Also note that these resource files are not downloaded to the Task working directory, but instead are downloaded to the Task root directory (one directory above the working directory).  There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "commonResourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonResourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_resource_files: Vec<ResourceFile>,
 }
 impl MultiInstanceSettings {
@@ -2509,7 +2775,12 @@ pub struct NetworkSecurityGroupRule {
     #[serde(rename = "sourceAddressPrefix")]
     pub source_address_prefix: String,
     #[doc = "Valid values are '*' (for all ports 0 - 65535), a specific port (i.e. 22), or a port range (i.e. 100-200). The ports must be in the range of 0 to 65535. Each entry in this collection must not overlap any other entry (either a range or an individual port). If any other values are provided the request fails with HTTP status code 400. The default value is '*'."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
 }
 impl NetworkSecurityGroupRule {
@@ -2648,7 +2919,11 @@ impl NodeFile {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeFileListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeFile>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -2887,26 +3162,55 @@ pub struct PoolAddParameter {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. There is a maximum of 10 Package references on any given Pool."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, Pool creation will fail."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
     #[doc = "The default value is 1. The maximum value is the smaller of 4 times the number of cores of the vmSize of the Pool or 256."]
     #[serde(rename = "maxTasksPerNode", default, skip_serializing_if = "Option::is_none")]
     pub max_tasks_per_node: Option<i32>,
     #[serde(rename = "taskSchedulingPolicy", default, skip_serializing_if = "Option::is_none")]
     pub task_scheduling_policy: Option<TaskSchedulingPolicy>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[doc = "Mount the storage using Azure fileshare, NFS, CIFS or Blobfuse based file system."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl PoolAddParameter {
@@ -2988,7 +3292,11 @@ impl PoolInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PoolListUsageMetricsResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PoolUsageMetrics>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -3025,7 +3333,11 @@ impl PoolNodeCounts {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PoolNodeCountsListResult {
     #[doc = "A list of Compute Node counts by Pool."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PoolNodeCounts>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -3047,13 +3359,27 @@ pub struct PoolPatchParameter {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "If this element is present, it replaces any existing Certificate references configured on the Pool. If omitted, any existing Certificate references are left unchanged. For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. If this element is present, it replaces any existing Package references. If you specify an empty collection, then all Package references are removed from the Pool. If omitted, any existing Package references are left unchanged."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "If this element is present, it replaces any existing metadata configured on the Pool. If you specify an empty collection, any metadata is removed from the Pool. If omitted, any existing metadata is left unchanged."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl PoolPatchParameter {
@@ -3129,21 +3455,50 @@ pub struct PoolSpecification {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. There is a maximum of 10 Package references on any given Pool."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, Pool creation will fail. The permitted licenses available on the Pool are 'maya', 'vray', '3dsmax', 'arnold'. An additional charge applies for each application license added to the Pool."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[doc = "This supports Azure Files, NFS, CIFS/SMB, and Blobfuse."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl PoolSpecification {
@@ -3265,7 +3620,12 @@ pub struct PublicIpAddressConfiguration {
     )]
     pub provision: Option<IpAddressProvisioningType>,
     #[doc = "The number of IPs specified here limits the maximum size of the Pool - 50 dedicated nodes or 20 low-priority nodes can be allocated for each public IP. For example, a pool needing 150 dedicated VMs would need at least 3 public IPs specified. Each element of this collection is of the form: /subscriptions/{subscription}/resourceGroups/{group}/providers/Microsoft.Network/publicIPAddresses/{ip}."]
-    #[serde(rename = "ipAddressIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddressIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_address_ids: Vec<String>,
 }
 impl PublicIpAddressConfiguration {
@@ -3291,7 +3651,11 @@ pub struct ResizeError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<NameValuePair>,
 }
 impl ResizeError {
@@ -3416,9 +3780,19 @@ pub struct StartTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[doc = "Specify either the userName or autoUser property, but not both."]
     #[serde(rename = "userIdentity", default, skip_serializing_if = "Option::is_none")]
@@ -3574,7 +3948,11 @@ impl TaskAddCollectionParameter {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskAddCollectionResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TaskAddResult>,
 }
 impl TaskAddCollectionResult {
@@ -3598,12 +3976,27 @@ pub struct TaskAddParameter {
     #[serde(rename = "exitConditions", default, skip_serializing_if = "Option::is_none")]
     pub exit_conditions: Option<ExitConditions>,
     #[doc = "For multi-instance Tasks, the resource files will only be downloaded to the Compute Node on which the primary Task is executed. There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
     #[doc = "For multi-instance Tasks, the files will only be uploaded from the Compute Node on which the primary Task is executed."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "affinityInfo", default, skip_serializing_if = "Option::is_none")]
     pub affinity_info: Option<AffinityInformation>,
@@ -3618,7 +4011,12 @@ pub struct TaskAddParameter {
     #[serde(rename = "dependsOn", default, skip_serializing_if = "Option::is_none")]
     pub depends_on: Option<TaskDependencies>,
     #[doc = "Application packages are downloaded and deployed to a shared directory, not the Task working directory. Therefore, if a referenced package is already on the Node, and is up to date, then it is not re-downloaded; the existing copy on the Compute Node is used. If a referenced Package cannot be installed, for example because the package has been deleted or because download failed, the Task fails."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[serde(rename = "authenticationTokenSettings", default, skip_serializing_if = "Option::is_none")]
     pub authentication_token_settings: Option<AuthenticationTokenSettings>,
@@ -3779,9 +4177,19 @@ impl TaskCounts {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskDependencies {
     #[doc = "The taskIds collection is limited to 64000 characters total (i.e. the combined length of all Task IDs). If the taskIds collection exceeds the maximum length, the Add Task request fails with error code TaskDependencyListTooLong. In this case consider using Task ID ranges instead."]
-    #[serde(rename = "taskIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "taskIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub task_ids: Vec<String>,
-    #[serde(rename = "taskIdRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "taskIdRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub task_id_ranges: Vec<TaskIdRange>,
 }
 impl TaskDependencies {
@@ -3854,7 +4262,11 @@ pub struct TaskFailureInformation {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<NameValuePair>,
 }
 impl TaskFailureInformation {
@@ -4108,7 +4520,12 @@ pub struct VirtualMachineConfiguration {
     #[serde(rename = "windowsConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub windows_configuration: Option<WindowsConfiguration>,
     #[doc = "This property must be specified if the Compute Nodes in the Pool need to have empty data disks attached to them. This cannot be updated. Each Compute Node gets its own disk (the disk is not a file share). Existing disks cannot be attached, each attached disk is empty. When the Compute Node is removed from the Pool, the disk and all data associated with it is also deleted. The disk is not formatted after being attached, it must be formatted before use - for more information see https://docs.microsoft.com/en-us/azure/virtual-machines/linux/classic/attach-disk#initialize-a-new-data-disk-in-linux and https://docs.microsoft.com/en-us/azure/virtual-machines/windows/attach-disk-ps#add-an-empty-data-disk-to-a-virtual-machine."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
     #[doc = "This only applies to Images that contain the Windows operating system, and should only be used when you hold valid on-premises licenses for the Compute Nodes which will be deployed. If omitted, no on-premises licensing discount is applied. Values are:\n\n Windows_Server - The on-premises license is for Windows Server.\n Windows_Client - The on-premises license is for Windows Client.\n"]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/batch/src/package_2020_09_12_0/models.rs b/services/svc/batch/src/package_2020_09_12_0/models.rs
index 7c36a10a5b..9af2be81e7 100644
--- a/services/svc/batch/src/package_2020_09_12_0/models.rs
+++ b/services/svc/batch/src/package_2020_09_12_0/models.rs
@@ -6,7 +6,11 @@ use serde::{Deserialize, Serialize, Serializer};
 use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountListSupportedImagesResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImageInformation>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -35,7 +39,11 @@ impl AffinityInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationSummary>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -86,7 +94,11 @@ impl ApplicationSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthenticationTokenSettings {
     #[doc = "The authentication token grants access to a limited set of Batch service operations. Currently the only supported value for the access property is 'job', which grants access to all operations related to the Job which contains the Task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access: Vec<String>,
 }
 impl AuthenticationTokenSettings {
@@ -152,7 +164,11 @@ pub struct AutoScaleRunError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<NameValuePair>,
 }
 impl AutoScaleRunError {
@@ -257,7 +273,11 @@ pub struct BatchError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<ErrorMessage>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<BatchErrorDetail>,
 }
 impl azure_core::Continuable for BatchError {
@@ -393,7 +413,11 @@ pub mod certificate_add_parameter {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Certificate>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -426,7 +450,11 @@ pub struct CertificateReference {
     #[serde(rename = "storeName", default, skip_serializing_if = "Option::is_none")]
     pub store_name: Option<String>,
     #[doc = "You can specify more than one visibility in this collection. The default is all Accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub visibility: Vec<String>,
 }
 impl CertificateReference {
@@ -512,7 +540,12 @@ pub struct CloudJob {
     #[serde(rename = "jobReleaseTask", default, skip_serializing_if = "Option::is_none")]
     pub job_release_task: Option<JobReleaseTask>,
     #[doc = "Individual Tasks can override an environment setting specified here by specifying the same setting name with a different value."]
-    #[serde(rename = "commonEnvironmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonEnvironmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "poolInfo", default, skip_serializing_if = "Option::is_none")]
     pub pool_info: Option<PoolInformation>,
@@ -534,7 +567,11 @@ pub struct CloudJob {
     #[serde(rename = "networkConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub network_configuration: Option<JobNetworkConfiguration>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(rename = "executionInfo", default, skip_serializing_if = "Option::is_none")]
     pub execution_info: Option<JobExecutionInformation>,
@@ -548,7 +585,11 @@ impl CloudJob {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudJobListPreparationAndReleaseTaskStatusResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobPreparationAndReleaseTaskExecutionInformation>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -566,7 +607,11 @@ impl CloudJobListPreparationAndReleaseTaskStatusResult {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudJobListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudJob>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -623,7 +668,11 @@ pub struct CloudJobSchedule {
     #[serde(rename = "executionInfo", default, skip_serializing_if = "Option::is_none")]
     pub execution_info: Option<JobScheduleExecutionInformation>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub stats: Option<JobScheduleStatistics>,
@@ -635,7 +684,11 @@ impl CloudJobSchedule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudJobScheduleListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudJobSchedule>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -697,7 +750,12 @@ pub struct CloudPool {
     #[serde(rename = "resizeTimeout", default, skip_serializing_if = "Option::is_none")]
     pub resize_timeout: Option<String>,
     #[doc = "This property is set only if one or more errors occurred during the last Pool resize, and only when the Pool allocationState is Steady."]
-    #[serde(rename = "resizeErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resizeErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resize_errors: Vec<ResizeError>,
     #[serde(rename = "currentDedicatedNodes", default, skip_serializing_if = "Option::is_none")]
     pub current_dedicated_nodes: Option<i32>,
@@ -729,27 +787,56 @@ pub struct CloudPool {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. There is a maximum of 10 Package references on any given Pool."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, Pool creation will fail."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
     #[doc = "The default value is 1. The maximum value is the smaller of 4 times the number of cores of the vmSize of the pool or 256."]
     #[serde(rename = "taskSlotsPerNode", default, skip_serializing_if = "Option::is_none")]
     pub task_slots_per_node: Option<i32>,
     #[serde(rename = "taskSchedulingPolicy", default, skip_serializing_if = "Option::is_none")]
     pub task_scheduling_policy: Option<TaskSchedulingPolicy>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub stats: Option<PoolStatistics>,
     #[doc = "This supports Azure Files, NFS, CIFS/SMB, and Blobfuse."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl CloudPool {
@@ -778,7 +865,11 @@ pub mod cloud_pool {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudPoolListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudPool>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -855,12 +946,27 @@ pub struct CloudTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "For multi-instance Tasks, the resource files will only be downloaded to the Compute Node on which the primary Task is executed. There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
     #[doc = "For multi-instance Tasks, the files will only be uploaded from the Compute Node on which the primary Task is executed."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "affinityInfo", default, skip_serializing_if = "Option::is_none")]
     pub affinity_info: Option<AffinityInformation>,
@@ -884,7 +990,12 @@ pub struct CloudTask {
     #[serde(rename = "dependsOn", default, skip_serializing_if = "Option::is_none")]
     pub depends_on: Option<TaskDependencies>,
     #[doc = "Application packages are downloaded and deployed to a shared directory, not the Task working directory. Therefore, if a referenced package is already on the Node, and is up to date, then it is not re-downloaded; the existing copy on the Compute Node is used. If a referenced Package cannot be installed, for example because the package has been deleted or because download failed, the Task fails."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[serde(rename = "authenticationTokenSettings", default, skip_serializing_if = "Option::is_none")]
     pub authentication_token_settings: Option<AuthenticationTokenSettings>,
@@ -896,7 +1007,11 @@ impl CloudTask {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudTaskListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudTask>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -914,7 +1029,11 @@ impl CloudTaskListResult {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudTaskListSubtasksResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubtaskInformation>,
 }
 impl CloudTaskListSubtasksResult {
@@ -969,7 +1088,12 @@ pub struct ComputeNode {
     #[serde(rename = "totalTasksSucceeded", default, skip_serializing_if = "Option::is_none")]
     pub total_tasks_succeeded: Option<i32>,
     #[doc = "This property is present only if at least one Task has run on this Compute Node since it was assigned to the Pool."]
-    #[serde(rename = "recentTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recentTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recent_tasks: Vec<TaskInformation>,
     #[doc = "Batch will retry Tasks when a recovery operation is triggered on a Node. Examples of recovery operations include (but are not limited to) when an unhealthy Node is rebooted or a Compute Node disappeared due to host failure. Retries due to recovery operations are independent of and are not counted against the maxTaskRetryCount. Even if the maxTaskRetryCount is 0, an internal retry due to a recovery operation may occur. Because of this, all Tasks should be idempotent. This means Tasks need to tolerate being interrupted and restarted without causing any corruption or duplicate data. The best practice for long running Tasks is to use some form of checkpointing. In some cases the StartTask may be re-run even though the Compute Node was not rebooted. Special care should be taken to avoid StartTasks which create breakaway process or install/launch services from the StartTask working directory, as this will block Batch from being able to re-run the StartTask."]
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
@@ -977,9 +1101,18 @@ pub struct ComputeNode {
     #[serde(rename = "startTaskInfo", default, skip_serializing_if = "Option::is_none")]
     pub start_task_info: Option<StartTaskInformation>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ComputeNodeError>,
     #[serde(rename = "isDedicated", default, skip_serializing_if = "Option::is_none")]
     pub is_dedicated: Option<bool>,
@@ -1062,7 +1195,12 @@ pub struct ComputeNodeError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<NameValuePair>,
 }
 impl ComputeNodeError {
@@ -1107,7 +1245,11 @@ impl ComputeNodeInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeNodeListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputeNode>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -1155,10 +1297,20 @@ pub struct ContainerConfiguration {
     #[serde(rename = "type", deserialize_with = "case_insensitive_deserialize")]
     pub type_: container_configuration::Type,
     #[doc = "This is the full Image reference, as would be specified to \"docker pull\". An Image will be sourced from the default Docker registry unless the Image is fully qualified with an alternative registry."]
-    #[serde(rename = "containerImageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerImageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_image_names: Vec<String>,
     #[doc = "If any Images must be downloaded from a private registry which requires credentials, then those credentials must be provided here."]
-    #[serde(rename = "containerRegistries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerRegistries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_registries: Vec<ContainerRegistry>,
 }
 impl ContainerConfiguration {
@@ -1233,7 +1385,11 @@ pub struct DeleteCertificateError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "This list includes details such as the active Pools and Compute Nodes referencing this Certificate. However, if a large number of resources reference the Certificate, the list contains only about the first hundred."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<NameValuePair>,
 }
 impl DeleteCertificateError {
@@ -1245,7 +1401,11 @@ impl DeleteCertificateError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskEncryptionConfiguration {
     #[doc = "If omitted, no disks on the compute nodes in the pool will be encrypted. On Linux pool, only \"TemporaryDisk\" is supported; on Windows pool, \"OsDisk\" and \"TemporaryDisk\" must be specified."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<String>,
 }
 impl DiskEncryptionConfiguration {
@@ -1315,9 +1475,19 @@ impl ExitCodeRangeMapping {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExitConditions {
-    #[serde(rename = "exitCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exitCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exit_codes: Vec<ExitCodeMapping>,
-    #[serde(rename = "exitCodeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exitCodeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exit_code_ranges: Vec<ExitCodeRangeMapping>,
     #[serde(rename = "preProcessingError", default, skip_serializing_if = "Option::is_none")]
     pub pre_processing_error: Option<ExitOptions>,
@@ -1420,7 +1590,11 @@ pub struct ImageInformation {
     #[serde(rename = "osType", deserialize_with = "case_insensitive_deserialize")]
     pub os_type: image_information::OsType,
     #[doc = "Not every capability of the Image is listed. Capabilities in this list are considered of special interest and are generally related to integration with other features in the Azure Batch service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<String>,
     #[serde(rename = "batchSupportEndOfLife", default, with = "azure_core::date::rfc3339::option")]
     pub batch_support_end_of_life: Option<time::OffsetDateTime>,
@@ -1540,7 +1714,12 @@ pub struct InboundNatPool {
     #[serde(rename = "frontendPortRangeEnd")]
     pub frontend_port_range_end: i32,
     #[doc = "The maximum number of rules that can be specified across all the endpoints on a Batch Pool is 25. If no network security group rules are specified, a default rule will be created to allow inbound access to the specified backendPort. If the maximum number of network security group rules is exceeded the request fails with HTTP status code 400."]
-    #[serde(rename = "networkSecurityGroupRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityGroupRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_group_rules: Vec<NetworkSecurityGroupRule>,
 }
 impl InboundNatPool {
@@ -1583,7 +1762,12 @@ pub struct JobAddParameter {
     #[serde(rename = "jobReleaseTask", default, skip_serializing_if = "Option::is_none")]
     pub job_release_task: Option<JobReleaseTask>,
     #[doc = "Individual Tasks can override an environment setting specified here by specifying the same setting name with a different value."]
-    #[serde(rename = "commonEnvironmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonEnvironmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "poolInfo")]
     pub pool_info: PoolInformation,
@@ -1603,7 +1787,11 @@ pub struct JobAddParameter {
     )]
     pub on_task_failure: Option<OnTaskFailure>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(rename = "usesTaskDependencies", default, skip_serializing_if = "Option::is_none")]
     pub uses_task_dependencies: Option<bool>,
@@ -1708,12 +1896,27 @@ pub struct JobManagerTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory. There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
     #[doc = "For multi-instance Tasks, the files will only be uploaded from the Compute Node on which the primary Task is executed."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub constraints: Option<TaskConstraints>,
@@ -1730,7 +1933,12 @@ pub struct JobManagerTask {
     #[serde(rename = "runExclusive", default, skip_serializing_if = "Option::is_none")]
     pub run_exclusive: Option<bool>,
     #[doc = "Application Packages are downloaded and deployed to a shared directory, not the Task working directory. Therefore, if a referenced Application Package is already on the Compute Node, and is up to date, then it is not re-downloaded; the existing copy on the Compute Node is used. If a referenced Application Package cannot be installed, for example because the package has been deleted or because download failed, the Task fails."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[serde(rename = "authenticationTokenSettings", default, skip_serializing_if = "Option::is_none")]
     pub authentication_token_settings: Option<AuthenticationTokenSettings>,
@@ -1787,7 +1995,11 @@ pub struct JobPatchParameter {
     #[serde(rename = "poolInfo", default, skip_serializing_if = "Option::is_none")]
     pub pool_info: Option<PoolInformation>,
     #[doc = "If omitted, the existing Job metadata is left unchanged."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobPatchParameter {
@@ -1825,9 +2037,19 @@ pub struct JobPreparationTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory.  There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub constraints: Option<TaskConstraints>,
@@ -1929,9 +2151,19 @@ pub struct JobReleaseTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "maxWallClockTime", default, skip_serializing_if = "Option::is_none")]
     pub max_wall_clock_time: Option<String>,
@@ -2020,7 +2252,11 @@ pub struct JobScheduleAddParameter {
     #[serde(rename = "jobSpecification")]
     pub job_specification: JobSpecification,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobScheduleAddParameter {
@@ -2057,7 +2293,11 @@ pub struct JobSchedulePatchParameter {
     #[serde(rename = "jobSpecification", default, skip_serializing_if = "Option::is_none")]
     pub job_specification: Option<JobSpecification>,
     #[doc = "If you do not specify this element, existing metadata is left unchanged."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobSchedulePatchParameter {
@@ -2151,7 +2391,11 @@ pub struct JobScheduleUpdateParameter {
     #[serde(rename = "jobSpecification")]
     pub job_specification: JobSpecification,
     #[doc = "If you do not specify this element, it takes the default value of an empty list; in effect, any existing metadata is deleted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobScheduleUpdateParameter {
@@ -2171,7 +2415,11 @@ pub struct JobSchedulingError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<NameValuePair>,
 }
 impl JobSchedulingError {
@@ -2223,12 +2471,21 @@ pub struct JobSpecification {
     #[serde(rename = "jobReleaseTask", default, skip_serializing_if = "Option::is_none")]
     pub job_release_task: Option<JobReleaseTask>,
     #[doc = "Individual Tasks can override an environment setting specified here by specifying the same setting name with a different value."]
-    #[serde(rename = "commonEnvironmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonEnvironmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "poolInfo")]
     pub pool_info: PoolInformation,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobSpecification {
@@ -2356,7 +2613,11 @@ pub struct JobUpdateParameter {
     #[serde(rename = "poolInfo")]
     pub pool_info: PoolInformation,
     #[doc = "If omitted, it takes the default value of an empty list; in effect, any existing metadata is deleted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(
         rename = "onAllTasksComplete",
@@ -2431,7 +2692,12 @@ pub struct MultiInstanceSettings {
     #[serde(rename = "coordinationCommandLine")]
     pub coordination_command_line: String,
     #[doc = "The difference between common resource files and Task resource files is that common resource files are downloaded for all subtasks including the primary, whereas Task resource files are downloaded only for the primary. Also note that these resource files are not downloaded to the Task working directory, but instead are downloaded to the Task root directory (one directory above the working directory).  There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "commonResourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonResourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_resource_files: Vec<ResourceFile>,
 }
 impl MultiInstanceSettings {
@@ -2518,7 +2784,12 @@ pub struct NetworkSecurityGroupRule {
     #[serde(rename = "sourceAddressPrefix")]
     pub source_address_prefix: String,
     #[doc = "Valid values are '*' (for all ports 0 - 65535), a specific port (i.e. 22), or a port range (i.e. 100-200). The ports must be in the range of 0 to 65535. Each entry in this collection must not overlap any other entry (either a range or an individual port). If any other values are provided the request fails with HTTP status code 400. The default value is '*'."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
 }
 impl NetworkSecurityGroupRule {
@@ -2657,7 +2928,11 @@ impl NodeFile {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeFileListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeFile>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -2897,26 +3172,55 @@ pub struct PoolAddParameter {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. There is a maximum of 10 Package references on any given Pool."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, Pool creation will fail."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
     #[doc = "The default value is 1. The maximum value is the smaller of 4 times the number of cores of the vmSize of the pool or 256."]
     #[serde(rename = "taskSlotsPerNode", default, skip_serializing_if = "Option::is_none")]
     pub task_slots_per_node: Option<i32>,
     #[serde(rename = "taskSchedulingPolicy", default, skip_serializing_if = "Option::is_none")]
     pub task_scheduling_policy: Option<TaskSchedulingPolicy>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[doc = "Mount the storage using Azure fileshare, NFS, CIFS or Blobfuse based file system."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl PoolAddParameter {
@@ -2998,7 +3302,11 @@ impl PoolInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PoolListUsageMetricsResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PoolUsageMetrics>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -3035,7 +3343,11 @@ impl PoolNodeCounts {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PoolNodeCountsListResult {
     #[doc = "A list of Compute Node counts by Pool."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PoolNodeCounts>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -3057,13 +3369,27 @@ pub struct PoolPatchParameter {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "If this element is present, it replaces any existing Certificate references configured on the Pool. If omitted, any existing Certificate references are left unchanged. For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. If this element is present, it replaces any existing Package references. If you specify an empty collection, then all Package references are removed from the Pool. If omitted, any existing Package references are left unchanged."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "If this element is present, it replaces any existing metadata configured on the Pool. If you specify an empty collection, any metadata is removed from the Pool. If omitted, any existing metadata is left unchanged."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl PoolPatchParameter {
@@ -3139,21 +3465,50 @@ pub struct PoolSpecification {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. There is a maximum of 10 Package references on any given Pool."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, Pool creation will fail. The permitted licenses available on the Pool are 'maya', 'vray', '3dsmax', 'arnold'. An additional charge applies for each application license added to the Pool."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[doc = "This supports Azure Files, NFS, CIFS/SMB, and Blobfuse."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl PoolSpecification {
@@ -3275,7 +3630,12 @@ pub struct PublicIpAddressConfiguration {
     )]
     pub provision: Option<IpAddressProvisioningType>,
     #[doc = "The number of IPs specified here limits the maximum size of the Pool - 100 dedicated nodes or 100 low-priority nodes can be allocated for each public IP. For example, a pool needing 250 dedicated VMs would need at least 3 public IPs specified. Each element of this collection is of the form: /subscriptions/{subscription}/resourceGroups/{group}/providers/Microsoft.Network/publicIPAddresses/{ip}."]
-    #[serde(rename = "ipAddressIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddressIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_address_ids: Vec<String>,
 }
 impl PublicIpAddressConfiguration {
@@ -3301,7 +3661,11 @@ pub struct ResizeError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<NameValuePair>,
 }
 impl ResizeError {
@@ -3426,9 +3790,19 @@ pub struct StartTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[doc = "Specify either the userName or autoUser property, but not both."]
     #[serde(rename = "userIdentity", default, skip_serializing_if = "Option::is_none")]
@@ -3584,7 +3958,11 @@ impl TaskAddCollectionParameter {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskAddCollectionResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TaskAddResult>,
 }
 impl TaskAddCollectionResult {
@@ -3608,12 +3986,27 @@ pub struct TaskAddParameter {
     #[serde(rename = "exitConditions", default, skip_serializing_if = "Option::is_none")]
     pub exit_conditions: Option<ExitConditions>,
     #[doc = "For multi-instance Tasks, the resource files will only be downloaded to the Compute Node on which the primary Task is executed. There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
     #[doc = "For multi-instance Tasks, the files will only be uploaded from the Compute Node on which the primary Task is executed."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "affinityInfo", default, skip_serializing_if = "Option::is_none")]
     pub affinity_info: Option<AffinityInformation>,
@@ -3631,7 +4024,12 @@ pub struct TaskAddParameter {
     #[serde(rename = "dependsOn", default, skip_serializing_if = "Option::is_none")]
     pub depends_on: Option<TaskDependencies>,
     #[doc = "Application packages are downloaded and deployed to a shared directory, not the Task working directory. Therefore, if a referenced package is already on the Node, and is up to date, then it is not re-downloaded; the existing copy on the Compute Node is used. If a referenced Package cannot be installed, for example because the package has been deleted or because download failed, the Task fails."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[serde(rename = "authenticationTokenSettings", default, skip_serializing_if = "Option::is_none")]
     pub authentication_token_settings: Option<AuthenticationTokenSettings>,
@@ -3808,9 +4206,19 @@ impl TaskCountsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskDependencies {
     #[doc = "The taskIds collection is limited to 64000 characters total (i.e. the combined length of all Task IDs). If the taskIds collection exceeds the maximum length, the Add Task request fails with error code TaskDependencyListTooLong. In this case consider using Task ID ranges instead."]
-    #[serde(rename = "taskIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "taskIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub task_ids: Vec<String>,
-    #[serde(rename = "taskIdRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "taskIdRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub task_id_ranges: Vec<TaskIdRange>,
 }
 impl TaskDependencies {
@@ -3883,7 +4291,11 @@ pub struct TaskFailureInformation {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<NameValuePair>,
 }
 impl TaskFailureInformation {
@@ -4156,7 +4568,12 @@ pub struct VirtualMachineConfiguration {
     #[serde(rename = "windowsConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub windows_configuration: Option<WindowsConfiguration>,
     #[doc = "This property must be specified if the Compute Nodes in the Pool need to have empty data disks attached to them. This cannot be updated. Each Compute Node gets its own disk (the disk is not a file share). Existing disks cannot be attached, each attached disk is empty. When the Compute Node is removed from the Pool, the disk and all data associated with it is also deleted. The disk is not formatted after being attached, it must be formatted before use - for more information see https://docs.microsoft.com/en-us/azure/virtual-machines/linux/classic/attach-disk#initialize-a-new-data-disk-in-linux and https://docs.microsoft.com/en-us/azure/virtual-machines/windows/attach-disk-ps#add-an-empty-data-disk-to-a-virtual-machine."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
     #[doc = "This only applies to Images that contain the Windows operating system, and should only be used when you hold valid on-premises licenses for the Compute Nodes which will be deployed. If omitted, no on-premises licensing discount is applied. Values are:\n\n Windows_Server - The on-premises license is for Windows Server.\n Windows_Client - The on-premises license is for Windows Client.\n"]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/batch/src/package_2021_06_14_0/models.rs b/services/svc/batch/src/package_2021_06_14_0/models.rs
index 2af2fc1332..b163909bbe 100644
--- a/services/svc/batch/src/package_2021_06_14_0/models.rs
+++ b/services/svc/batch/src/package_2021_06_14_0/models.rs
@@ -6,7 +6,11 @@ use serde::{Deserialize, Serialize, Serializer};
 use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountListSupportedImagesResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImageInformation>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -35,7 +39,11 @@ impl AffinityInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationSummary>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -86,7 +94,11 @@ impl ApplicationSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthenticationTokenSettings {
     #[doc = "The authentication token grants access to a limited set of Batch service operations. Currently the only supported value for the access property is 'job', which grants access to all operations related to the Job which contains the Task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access: Vec<String>,
 }
 impl AuthenticationTokenSettings {
@@ -152,7 +164,11 @@ pub struct AutoScaleRunError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<NameValuePair>,
 }
 impl AutoScaleRunError {
@@ -261,7 +277,11 @@ pub struct BatchError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<ErrorMessage>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<BatchErrorDetail>,
 }
 impl azure_core::Continuable for BatchError {
@@ -294,7 +314,12 @@ pub struct BatchPoolIdentity {
     #[serde(rename = "type", deserialize_with = "case_insensitive_deserialize")]
     pub type_: batch_pool_identity::Type,
     #[doc = "The user identity dictionary key references will be ARM resource ids in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ManagedIdentity/userAssignedIdentities/{identityName}'."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<UserAssignedIdentity>,
 }
 impl BatchPoolIdentity {
@@ -424,7 +449,11 @@ pub mod certificate_add_parameter {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Certificate>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -457,7 +486,11 @@ pub struct CertificateReference {
     #[serde(rename = "storeName", default, skip_serializing_if = "Option::is_none")]
     pub store_name: Option<String>,
     #[doc = "You can specify more than one visibility in this collection. The default is all Accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub visibility: Vec<String>,
 }
 impl CertificateReference {
@@ -546,7 +579,12 @@ pub struct CloudJob {
     #[serde(rename = "jobReleaseTask", default, skip_serializing_if = "Option::is_none")]
     pub job_release_task: Option<JobReleaseTask>,
     #[doc = "Individual Tasks can override an environment setting specified here by specifying the same setting name with a different value."]
-    #[serde(rename = "commonEnvironmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonEnvironmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "poolInfo", default, skip_serializing_if = "Option::is_none")]
     pub pool_info: Option<PoolInformation>,
@@ -568,7 +606,11 @@ pub struct CloudJob {
     #[serde(rename = "networkConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub network_configuration: Option<JobNetworkConfiguration>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(rename = "executionInfo", default, skip_serializing_if = "Option::is_none")]
     pub execution_info: Option<JobExecutionInformation>,
@@ -582,7 +624,11 @@ impl CloudJob {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudJobListPreparationAndReleaseTaskStatusResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobPreparationAndReleaseTaskExecutionInformation>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -600,7 +646,11 @@ impl CloudJobListPreparationAndReleaseTaskStatusResult {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudJobListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudJob>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -657,7 +707,11 @@ pub struct CloudJobSchedule {
     #[serde(rename = "executionInfo", default, skip_serializing_if = "Option::is_none")]
     pub execution_info: Option<JobScheduleExecutionInformation>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub stats: Option<JobScheduleStatistics>,
@@ -669,7 +723,11 @@ impl CloudJobSchedule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudJobScheduleListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudJobSchedule>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -731,7 +789,12 @@ pub struct CloudPool {
     #[serde(rename = "resizeTimeout", default, skip_serializing_if = "Option::is_none")]
     pub resize_timeout: Option<String>,
     #[doc = "This property is set only if one or more errors occurred during the last Pool resize, and only when the Pool allocationState is Steady."]
-    #[serde(rename = "resizeErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resizeErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resize_errors: Vec<ResizeError>,
     #[serde(rename = "currentDedicatedNodes", default, skip_serializing_if = "Option::is_none")]
     pub current_dedicated_nodes: Option<i32>,
@@ -763,27 +826,56 @@ pub struct CloudPool {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. There is a maximum of 10 Package references on any given Pool."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, Pool creation will fail."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
     #[doc = "The default value is 1. The maximum value is the smaller of 4 times the number of cores of the vmSize of the pool or 256."]
     #[serde(rename = "taskSlotsPerNode", default, skip_serializing_if = "Option::is_none")]
     pub task_slots_per_node: Option<i32>,
     #[serde(rename = "taskSchedulingPolicy", default, skip_serializing_if = "Option::is_none")]
     pub task_scheduling_policy: Option<TaskSchedulingPolicy>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub stats: Option<PoolStatistics>,
     #[doc = "This supports Azure Files, NFS, CIFS/SMB, and Blobfuse."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
     #[doc = "The identity of the Batch pool, if configured."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -815,7 +907,11 @@ pub mod cloud_pool {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudPoolListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudPool>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -892,12 +988,27 @@ pub struct CloudTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "For multi-instance Tasks, the resource files will only be downloaded to the Compute Node on which the primary Task is executed. There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
     #[doc = "For multi-instance Tasks, the files will only be uploaded from the Compute Node on which the primary Task is executed."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "affinityInfo", default, skip_serializing_if = "Option::is_none")]
     pub affinity_info: Option<AffinityInformation>,
@@ -921,7 +1032,12 @@ pub struct CloudTask {
     #[serde(rename = "dependsOn", default, skip_serializing_if = "Option::is_none")]
     pub depends_on: Option<TaskDependencies>,
     #[doc = "Application packages are downloaded and deployed to a shared directory, not the Task working directory. Therefore, if a referenced package is already on the Node, and is up to date, then it is not re-downloaded; the existing copy on the Compute Node is used. If a referenced Package cannot be installed, for example because the package has been deleted or because download failed, the Task fails."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[serde(rename = "authenticationTokenSettings", default, skip_serializing_if = "Option::is_none")]
     pub authentication_token_settings: Option<AuthenticationTokenSettings>,
@@ -933,7 +1049,11 @@ impl CloudTask {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudTaskListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudTask>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -951,7 +1071,11 @@ impl CloudTaskListResult {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudTaskListSubtasksResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubtaskInformation>,
 }
 impl CloudTaskListSubtasksResult {
@@ -1006,7 +1130,12 @@ pub struct ComputeNode {
     #[serde(rename = "totalTasksSucceeded", default, skip_serializing_if = "Option::is_none")]
     pub total_tasks_succeeded: Option<i32>,
     #[doc = "This property is present only if at least one Task has run on this Compute Node since it was assigned to the Pool."]
-    #[serde(rename = "recentTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recentTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recent_tasks: Vec<TaskInformation>,
     #[doc = "Batch will retry Tasks when a recovery operation is triggered on a Node. Examples of recovery operations include (but are not limited to) when an unhealthy Node is rebooted or a Compute Node disappeared due to host failure. Retries due to recovery operations are independent of and are not counted against the maxTaskRetryCount. Even if the maxTaskRetryCount is 0, an internal retry due to a recovery operation may occur. Because of this, all Tasks should be idempotent. This means Tasks need to tolerate being interrupted and restarted without causing any corruption or duplicate data. The best practice for long running Tasks is to use some form of checkpointing. In some cases the StartTask may be re-run even though the Compute Node was not rebooted. Special care should be taken to avoid StartTasks which create breakaway process or install/launch services from the StartTask working directory, as this will block Batch from being able to re-run the StartTask."]
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
@@ -1014,9 +1143,18 @@ pub struct ComputeNode {
     #[serde(rename = "startTaskInfo", default, skip_serializing_if = "Option::is_none")]
     pub start_task_info: Option<StartTaskInformation>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ComputeNodeError>,
     #[serde(rename = "isDedicated", default, skip_serializing_if = "Option::is_none")]
     pub is_dedicated: Option<bool>,
@@ -1101,7 +1239,12 @@ pub struct ComputeNodeError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<NameValuePair>,
 }
 impl ComputeNodeError {
@@ -1158,7 +1301,11 @@ impl ComputeNodeInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeNodeListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputeNode>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -1206,10 +1353,20 @@ pub struct ContainerConfiguration {
     #[serde(rename = "type", deserialize_with = "case_insensitive_deserialize")]
     pub type_: container_configuration::Type,
     #[doc = "This is the full Image reference, as would be specified to \"docker pull\". An Image will be sourced from the default Docker registry unless the Image is fully qualified with an alternative registry."]
-    #[serde(rename = "containerImageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerImageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_image_names: Vec<String>,
     #[doc = "If any Images must be downloaded from a private registry which requires credentials, then those credentials must be provided here."]
-    #[serde(rename = "containerRegistries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerRegistries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_registries: Vec<ContainerRegistry>,
 }
 impl ContainerConfiguration {
@@ -1285,7 +1442,11 @@ pub struct DeleteCertificateError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "This list includes details such as the active Pools and Compute Nodes referencing this Certificate. However, if a large number of resources reference the Certificate, the list contains only about the first hundred."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<NameValuePair>,
 }
 impl DeleteCertificateError {
@@ -1317,7 +1478,11 @@ impl DiffDiskSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskEncryptionConfiguration {
     #[doc = "If omitted, no disks on the compute nodes in the pool will be encrypted. On Linux pool, only \"TemporaryDisk\" is supported; on Windows pool, \"OsDisk\" and \"TemporaryDisk\" must be specified."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<String>,
 }
 impl DiskEncryptionConfiguration {
@@ -1387,9 +1552,19 @@ impl ExitCodeRangeMapping {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExitConditions {
-    #[serde(rename = "exitCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exitCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exit_codes: Vec<ExitCodeMapping>,
-    #[serde(rename = "exitCodeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exitCodeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exit_code_ranges: Vec<ExitCodeRangeMapping>,
     #[serde(rename = "preProcessingError", default, skip_serializing_if = "Option::is_none")]
     pub pre_processing_error: Option<ExitOptions>,
@@ -1492,7 +1667,11 @@ pub struct ImageInformation {
     #[serde(rename = "osType", deserialize_with = "case_insensitive_deserialize")]
     pub os_type: image_information::OsType,
     #[doc = "Not every capability of the Image is listed. Capabilities in this list are considered of special interest and are generally related to integration with other features in the Azure Batch service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<String>,
     #[serde(rename = "batchSupportEndOfLife", default, with = "azure_core::date::rfc3339::option")]
     pub batch_support_end_of_life: Option<time::OffsetDateTime>,
@@ -1615,7 +1794,12 @@ pub struct InboundNatPool {
     #[serde(rename = "frontendPortRangeEnd")]
     pub frontend_port_range_end: i32,
     #[doc = "The maximum number of rules that can be specified across all the endpoints on a Batch Pool is 25. If no network security group rules are specified, a default rule will be created to allow inbound access to the specified backendPort. If the maximum number of network security group rules is exceeded the request fails with HTTP status code 400."]
-    #[serde(rename = "networkSecurityGroupRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityGroupRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_group_rules: Vec<NetworkSecurityGroupRule>,
 }
 impl InboundNatPool {
@@ -1693,7 +1877,12 @@ pub struct JobAddParameter {
     #[serde(rename = "jobReleaseTask", default, skip_serializing_if = "Option::is_none")]
     pub job_release_task: Option<JobReleaseTask>,
     #[doc = "Individual Tasks can override an environment setting specified here by specifying the same setting name with a different value."]
-    #[serde(rename = "commonEnvironmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonEnvironmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "poolInfo")]
     pub pool_info: PoolInformation,
@@ -1713,7 +1902,11 @@ pub struct JobAddParameter {
     )]
     pub on_task_failure: Option<OnTaskFailure>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(rename = "usesTaskDependencies", default, skip_serializing_if = "Option::is_none")]
     pub uses_task_dependencies: Option<bool>,
@@ -1819,12 +2012,27 @@ pub struct JobManagerTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory. There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
     #[doc = "For multi-instance Tasks, the files will only be uploaded from the Compute Node on which the primary Task is executed."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub constraints: Option<TaskConstraints>,
@@ -1841,7 +2049,12 @@ pub struct JobManagerTask {
     #[serde(rename = "runExclusive", default, skip_serializing_if = "Option::is_none")]
     pub run_exclusive: Option<bool>,
     #[doc = "Application Packages are downloaded and deployed to a shared directory, not the Task working directory. Therefore, if a referenced Application Package is already on the Compute Node, and is up to date, then it is not re-downloaded; the existing copy on the Compute Node is used. If a referenced Application Package cannot be installed, for example because the package has been deleted or because download failed, the Task fails."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[serde(rename = "authenticationTokenSettings", default, skip_serializing_if = "Option::is_none")]
     pub authentication_token_settings: Option<AuthenticationTokenSettings>,
@@ -1901,7 +2114,11 @@ pub struct JobPatchParameter {
     #[serde(rename = "poolInfo", default, skip_serializing_if = "Option::is_none")]
     pub pool_info: Option<PoolInformation>,
     #[doc = "If omitted, the existing Job metadata is left unchanged."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobPatchParameter {
@@ -1939,9 +2156,19 @@ pub struct JobPreparationTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory.  There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub constraints: Option<TaskConstraints>,
@@ -2043,9 +2270,19 @@ pub struct JobReleaseTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "maxWallClockTime", default, skip_serializing_if = "Option::is_none")]
     pub max_wall_clock_time: Option<String>,
@@ -2134,7 +2371,11 @@ pub struct JobScheduleAddParameter {
     #[serde(rename = "jobSpecification")]
     pub job_specification: JobSpecification,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobScheduleAddParameter {
@@ -2171,7 +2412,11 @@ pub struct JobSchedulePatchParameter {
     #[serde(rename = "jobSpecification", default, skip_serializing_if = "Option::is_none")]
     pub job_specification: Option<JobSpecification>,
     #[doc = "If you do not specify this element, existing metadata is left unchanged."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobSchedulePatchParameter {
@@ -2265,7 +2510,11 @@ pub struct JobScheduleUpdateParameter {
     #[serde(rename = "jobSpecification")]
     pub job_specification: JobSpecification,
     #[doc = "If you do not specify this element, it takes the default value of an empty list; in effect, any existing metadata is deleted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobScheduleUpdateParameter {
@@ -2285,7 +2534,11 @@ pub struct JobSchedulingError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<NameValuePair>,
 }
 impl JobSchedulingError {
@@ -2340,12 +2593,21 @@ pub struct JobSpecification {
     #[serde(rename = "jobReleaseTask", default, skip_serializing_if = "Option::is_none")]
     pub job_release_task: Option<JobReleaseTask>,
     #[doc = "Individual Tasks can override an environment setting specified here by specifying the same setting name with a different value."]
-    #[serde(rename = "commonEnvironmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonEnvironmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "poolInfo")]
     pub pool_info: PoolInformation,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobSpecification {
@@ -2474,7 +2736,11 @@ pub struct JobUpdateParameter {
     #[serde(rename = "poolInfo")]
     pub pool_info: PoolInformation,
     #[doc = "If omitted, it takes the default value of an empty list; in effect, any existing metadata is deleted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(
         rename = "onAllTasksComplete",
@@ -2549,7 +2815,12 @@ pub struct MultiInstanceSettings {
     #[serde(rename = "coordinationCommandLine")]
     pub coordination_command_line: String,
     #[doc = "The difference between common resource files and Task resource files is that common resource files are downloaded for all subtasks including the primary, whereas Task resource files are downloaded only for the primary. Also note that these resource files are not downloaded to the Task working directory, but instead are downloaded to the Task root directory (one directory above the working directory).  There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "commonResourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonResourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_resource_files: Vec<ResourceFile>,
 }
 impl MultiInstanceSettings {
@@ -2636,7 +2907,12 @@ pub struct NetworkSecurityGroupRule {
     #[serde(rename = "sourceAddressPrefix")]
     pub source_address_prefix: String,
     #[doc = "Valid values are '*' (for all ports 0 - 65535), a specific port (i.e. 22), or a port range (i.e. 100-200). The ports must be in the range of 0 to 65535. Each entry in this collection must not overlap any other entry (either a range or an individual port). If any other values are provided the request fails with HTTP status code 400. The default value is '*'."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
 }
 impl NetworkSecurityGroupRule {
@@ -2775,7 +3051,11 @@ impl NodeFile {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeFileListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeFile>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -2936,7 +3216,11 @@ impl NodeVmExtension {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeVmExtensionList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeVmExtension>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -3088,26 +3372,55 @@ pub struct PoolAddParameter {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. There is a maximum of 10 Package references on any given Pool."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, Pool creation will fail."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
     #[doc = "The default value is 1. The maximum value is the smaller of 4 times the number of cores of the vmSize of the pool or 256."]
     #[serde(rename = "taskSlotsPerNode", default, skip_serializing_if = "Option::is_none")]
     pub task_slots_per_node: Option<i32>,
     #[serde(rename = "taskSchedulingPolicy", default, skip_serializing_if = "Option::is_none")]
     pub task_scheduling_policy: Option<TaskSchedulingPolicy>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[doc = "Mount the storage using Azure fileshare, NFS, CIFS or Blobfuse based file system."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl PoolAddParameter {
@@ -3189,7 +3502,11 @@ impl PoolInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PoolListUsageMetricsResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PoolUsageMetrics>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -3226,7 +3543,11 @@ impl PoolNodeCounts {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PoolNodeCountsListResult {
     #[doc = "A list of Compute Node counts by Pool."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PoolNodeCounts>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -3248,13 +3569,27 @@ pub struct PoolPatchParameter {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "If this element is present, it replaces any existing Certificate references configured on the Pool. If omitted, any existing Certificate references are left unchanged. For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. If this element is present, it replaces any existing Package references. If you specify an empty collection, then all Package references are removed from the Pool. If omitted, any existing Package references are left unchanged."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "If this element is present, it replaces any existing metadata configured on the Pool. If you specify an empty collection, any metadata is removed from the Pool. If omitted, any existing metadata is left unchanged."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl PoolPatchParameter {
@@ -3330,21 +3665,50 @@ pub struct PoolSpecification {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. There is a maximum of 10 Package references on any given Pool."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, Pool creation will fail. The permitted licenses available on the Pool are 'maya', 'vray', '3dsmax', 'arnold'. An additional charge applies for each application license added to the Pool."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[doc = "This supports Azure Files, NFS, CIFS/SMB, and Blobfuse."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl PoolSpecification {
@@ -3466,7 +3830,12 @@ pub struct PublicIpAddressConfiguration {
     )]
     pub provision: Option<IpAddressProvisioningType>,
     #[doc = "The number of IPs specified here limits the maximum size of the Pool - 100 dedicated nodes or 100 low-priority nodes can be allocated for each public IP. For example, a pool needing 250 dedicated VMs would need at least 3 public IPs specified. Each element of this collection is of the form: /subscriptions/{subscription}/resourceGroups/{group}/providers/Microsoft.Network/publicIPAddresses/{ip}."]
-    #[serde(rename = "ipAddressIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddressIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_address_ids: Vec<String>,
 }
 impl PublicIpAddressConfiguration {
@@ -3492,7 +3861,11 @@ pub struct ResizeError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<NameValuePair>,
 }
 impl ResizeError {
@@ -3620,9 +3993,19 @@ pub struct StartTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[doc = "Specify either the userName or autoUser property, but not both."]
     #[serde(rename = "userIdentity", default, skip_serializing_if = "Option::is_none")]
@@ -3778,7 +4161,11 @@ impl TaskAddCollectionParameter {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskAddCollectionResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TaskAddResult>,
 }
 impl TaskAddCollectionResult {
@@ -3802,12 +4189,27 @@ pub struct TaskAddParameter {
     #[serde(rename = "exitConditions", default, skip_serializing_if = "Option::is_none")]
     pub exit_conditions: Option<ExitConditions>,
     #[doc = "For multi-instance Tasks, the resource files will only be downloaded to the Compute Node on which the primary Task is executed. There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
     #[doc = "For multi-instance Tasks, the files will only be uploaded from the Compute Node on which the primary Task is executed."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "affinityInfo", default, skip_serializing_if = "Option::is_none")]
     pub affinity_info: Option<AffinityInformation>,
@@ -3825,7 +4227,12 @@ pub struct TaskAddParameter {
     #[serde(rename = "dependsOn", default, skip_serializing_if = "Option::is_none")]
     pub depends_on: Option<TaskDependencies>,
     #[doc = "Application packages are downloaded and deployed to a shared directory, not the Task working directory. Therefore, if a referenced package is already on the Node, and is up to date, then it is not re-downloaded; the existing copy on the Compute Node is used. If a referenced Package cannot be installed, for example because the package has been deleted or because download failed, the Task fails."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[serde(rename = "authenticationTokenSettings", default, skip_serializing_if = "Option::is_none")]
     pub authentication_token_settings: Option<AuthenticationTokenSettings>,
@@ -4002,9 +4409,19 @@ impl TaskCountsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskDependencies {
     #[doc = "The taskIds collection is limited to 64000 characters total (i.e. the combined length of all Task IDs). If the taskIds collection exceeds the maximum length, the Add Task request fails with error code TaskDependencyListTooLong. In this case consider using Task ID ranges instead."]
-    #[serde(rename = "taskIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "taskIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub task_ids: Vec<String>,
-    #[serde(rename = "taskIdRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "taskIdRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub task_id_ranges: Vec<TaskIdRange>,
 }
 impl TaskDependencies {
@@ -4077,7 +4494,11 @@ pub struct TaskFailureInformation {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<NameValuePair>,
 }
 impl TaskFailureInformation {
@@ -4383,7 +4804,12 @@ pub struct VmExtension {
     #[serde(rename = "protectedSettings", default, skip_serializing_if = "Option::is_none")]
     pub protected_settings: Option<serde_json::Value>,
     #[doc = "Collection of extension names after which this extension needs to be provisioned."]
-    #[serde(rename = "provisionAfterExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisionAfterExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provision_after_extensions: Vec<String>,
 }
 impl VmExtension {
@@ -4405,10 +4831,19 @@ pub struct VmExtensionInstanceView {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "The resource status information."]
-    #[serde(rename = "subStatuses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subStatuses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_statuses: Vec<InstanceViewStatus>,
 }
 impl VmExtensionInstanceView {
@@ -4426,7 +4861,12 @@ pub struct VirtualMachineConfiguration {
     #[serde(rename = "windowsConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub windows_configuration: Option<WindowsConfiguration>,
     #[doc = "This property must be specified if the Compute Nodes in the Pool need to have empty data disks attached to them. This cannot be updated. Each Compute Node gets its own disk (the disk is not a file share). Existing disks cannot be attached, each attached disk is empty. When the Compute Node is removed from the Pool, the disk and all data associated with it is also deleted. The disk is not formatted after being attached, it must be formatted before use - for more information see https://docs.microsoft.com/en-us/azure/virtual-machines/linux/classic/attach-disk#initialize-a-new-data-disk-in-linux and https://docs.microsoft.com/en-us/azure/virtual-machines/windows/attach-disk-ps#add-an-empty-data-disk-to-a-virtual-machine."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
     #[doc = "This only applies to Images that contain the Windows operating system, and should only be used when you hold valid on-premises licenses for the Compute Nodes which will be deployed. If omitted, no on-premises licensing discount is applied. Values are:\n\n Windows_Server - The on-premises license is for Windows Server.\n Windows_Client - The on-premises license is for Windows Client.\n"]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -4440,7 +4880,11 @@ pub struct VirtualMachineConfiguration {
     #[serde(rename = "nodePlacementConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub node_placement_configuration: Option<NodePlacementConfiguration>,
     #[doc = "If specified, the extensions mentioned in this configuration will be installed on each node."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VmExtension>,
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
diff --git a/services/svc/batch/src/package_2022_01_15_0/models.rs b/services/svc/batch/src/package_2022_01_15_0/models.rs
index fa0747059f..e64d6ff16d 100644
--- a/services/svc/batch/src/package_2022_01_15_0/models.rs
+++ b/services/svc/batch/src/package_2022_01_15_0/models.rs
@@ -6,7 +6,11 @@ use serde::{Deserialize, Serialize, Serializer};
 use std::str::FromStr;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AccountListSupportedImagesResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ImageInformation>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -35,7 +39,11 @@ impl AffinityInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ApplicationSummary>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -86,7 +94,11 @@ impl ApplicationSummary {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AuthenticationTokenSettings {
     #[doc = "The authentication token grants access to a limited set of Batch service operations. Currently the only supported value for the access property is 'job', which grants access to all operations related to the Job which contains the Task."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access: Vec<String>,
 }
 impl AuthenticationTokenSettings {
@@ -152,7 +164,11 @@ pub struct AutoScaleRunError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<NameValuePair>,
 }
 impl AutoScaleRunError {
@@ -261,7 +277,11 @@ pub struct BatchError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<ErrorMessage>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<BatchErrorDetail>,
 }
 impl azure_core::Continuable for BatchError {
@@ -294,7 +314,12 @@ pub struct BatchPoolIdentity {
     #[serde(rename = "type", deserialize_with = "case_insensitive_deserialize")]
     pub type_: batch_pool_identity::Type,
     #[doc = "The user identity dictionary key references will be ARM resource ids in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ManagedIdentity/userAssignedIdentities/{identityName}'."]
-    #[serde(rename = "userAssignedIdentities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAssignedIdentities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_assigned_identities: Vec<UserAssignedIdentity>,
 }
 impl BatchPoolIdentity {
@@ -424,7 +449,11 @@ pub mod certificate_add_parameter {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Certificate>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -457,7 +486,11 @@ pub struct CertificateReference {
     #[serde(rename = "storeName", default, skip_serializing_if = "Option::is_none")]
     pub store_name: Option<String>,
     #[doc = "You can specify more than one visibility in this collection. The default is all Accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub visibility: Vec<String>,
 }
 impl CertificateReference {
@@ -549,7 +582,12 @@ pub struct CloudJob {
     #[serde(rename = "jobReleaseTask", default, skip_serializing_if = "Option::is_none")]
     pub job_release_task: Option<JobReleaseTask>,
     #[doc = "Individual Tasks can override an environment setting specified here by specifying the same setting name with a different value."]
-    #[serde(rename = "commonEnvironmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonEnvironmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "poolInfo", default, skip_serializing_if = "Option::is_none")]
     pub pool_info: Option<PoolInformation>,
@@ -571,7 +609,11 @@ pub struct CloudJob {
     #[serde(rename = "networkConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub network_configuration: Option<JobNetworkConfiguration>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(rename = "executionInfo", default, skip_serializing_if = "Option::is_none")]
     pub execution_info: Option<JobExecutionInformation>,
@@ -585,7 +627,11 @@ impl CloudJob {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudJobListPreparationAndReleaseTaskStatusResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobPreparationAndReleaseTaskExecutionInformation>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -603,7 +649,11 @@ impl CloudJobListPreparationAndReleaseTaskStatusResult {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudJobListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudJob>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -660,7 +710,11 @@ pub struct CloudJobSchedule {
     #[serde(rename = "executionInfo", default, skip_serializing_if = "Option::is_none")]
     pub execution_info: Option<JobScheduleExecutionInformation>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub stats: Option<JobScheduleStatistics>,
@@ -672,7 +726,11 @@ impl CloudJobSchedule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudJobScheduleListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudJobSchedule>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -734,7 +792,12 @@ pub struct CloudPool {
     #[serde(rename = "resizeTimeout", default, skip_serializing_if = "Option::is_none")]
     pub resize_timeout: Option<String>,
     #[doc = "This property is set only if one or more errors occurred during the last Pool resize, and only when the Pool allocationState is Steady."]
-    #[serde(rename = "resizeErrors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resizeErrors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resize_errors: Vec<ResizeError>,
     #[serde(rename = "currentDedicatedNodes", default, skip_serializing_if = "Option::is_none")]
     pub current_dedicated_nodes: Option<i32>,
@@ -766,27 +829,56 @@ pub struct CloudPool {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. There is a maximum of 10 Package references on any given Pool."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, Pool creation will fail."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
     #[doc = "The default value is 1. The maximum value is the smaller of 4 times the number of cores of the vmSize of the pool or 256."]
     #[serde(rename = "taskSlotsPerNode", default, skip_serializing_if = "Option::is_none")]
     pub task_slots_per_node: Option<i32>,
     #[serde(rename = "taskSchedulingPolicy", default, skip_serializing_if = "Option::is_none")]
     pub task_scheduling_policy: Option<TaskSchedulingPolicy>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub stats: Option<PoolStatistics>,
     #[doc = "This supports Azure Files, NFS, CIFS/SMB, and Blobfuse."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
     #[doc = "The identity of the Batch pool, if configured."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -818,7 +910,11 @@ pub mod cloud_pool {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudPoolListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudPool>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -895,12 +991,27 @@ pub struct CloudTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "For multi-instance Tasks, the resource files will only be downloaded to the Compute Node on which the primary Task is executed. There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
     #[doc = "For multi-instance Tasks, the files will only be uploaded from the Compute Node on which the primary Task is executed."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "affinityInfo", default, skip_serializing_if = "Option::is_none")]
     pub affinity_info: Option<AffinityInformation>,
@@ -924,7 +1035,12 @@ pub struct CloudTask {
     #[serde(rename = "dependsOn", default, skip_serializing_if = "Option::is_none")]
     pub depends_on: Option<TaskDependencies>,
     #[doc = "Application packages are downloaded and deployed to a shared directory, not the Task working directory. Therefore, if a referenced package is already on the Node, and is up to date, then it is not re-downloaded; the existing copy on the Compute Node is used. If a referenced Package cannot be installed, for example because the package has been deleted or because download failed, the Task fails."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[serde(rename = "authenticationTokenSettings", default, skip_serializing_if = "Option::is_none")]
     pub authentication_token_settings: Option<AuthenticationTokenSettings>,
@@ -936,7 +1052,11 @@ impl CloudTask {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudTaskListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CloudTask>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -954,7 +1074,11 @@ impl CloudTaskListResult {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CloudTaskListSubtasksResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SubtaskInformation>,
 }
 impl CloudTaskListSubtasksResult {
@@ -1009,7 +1133,12 @@ pub struct ComputeNode {
     #[serde(rename = "totalTasksSucceeded", default, skip_serializing_if = "Option::is_none")]
     pub total_tasks_succeeded: Option<i32>,
     #[doc = "This property is present only if at least one Task has run on this Compute Node since it was assigned to the Pool."]
-    #[serde(rename = "recentTasks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recentTasks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recent_tasks: Vec<TaskInformation>,
     #[doc = "Batch will retry Tasks when a recovery operation is triggered on a Node. Examples of recovery operations include (but are not limited to) when an unhealthy Node is rebooted or a Compute Node disappeared due to host failure. Retries due to recovery operations are independent of and are not counted against the maxTaskRetryCount. Even if the maxTaskRetryCount is 0, an internal retry due to a recovery operation may occur. Because of this, all Tasks should be idempotent. This means Tasks need to tolerate being interrupted and restarted without causing any corruption or duplicate data. The best practice for long running Tasks is to use some form of checkpointing. In some cases the StartTask may be re-run even though the Compute Node was not rebooted. Special care should be taken to avoid StartTasks which create breakaway process or install/launch services from the StartTask working directory, as this will block Batch from being able to re-run the StartTask."]
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
@@ -1017,9 +1146,18 @@ pub struct ComputeNode {
     #[serde(rename = "startTaskInfo", default, skip_serializing_if = "Option::is_none")]
     pub start_task_info: Option<StartTaskInformation>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<ComputeNodeError>,
     #[serde(rename = "isDedicated", default, skip_serializing_if = "Option::is_none")]
     pub is_dedicated: Option<bool>,
@@ -1104,7 +1242,12 @@ pub struct ComputeNodeError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(rename = "errorDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_details: Vec<NameValuePair>,
 }
 impl ComputeNodeError {
@@ -1161,7 +1304,11 @@ impl ComputeNodeInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ComputeNodeListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ComputeNode>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -1209,10 +1356,20 @@ pub struct ContainerConfiguration {
     #[serde(rename = "type", deserialize_with = "case_insensitive_deserialize")]
     pub type_: container_configuration::Type,
     #[doc = "This is the full Image reference, as would be specified to \"docker pull\". An Image will be sourced from the default Docker registry unless the Image is fully qualified with an alternative registry."]
-    #[serde(rename = "containerImageNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerImageNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_image_names: Vec<String>,
     #[doc = "If any Images must be downloaded from a private registry which requires credentials, then those credentials must be provided here."]
-    #[serde(rename = "containerRegistries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "containerRegistries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub container_registries: Vec<ContainerRegistry>,
 }
 impl ContainerConfiguration {
@@ -1288,7 +1445,11 @@ pub struct DeleteCertificateError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "This list includes details such as the active Pools and Compute Nodes referencing this Certificate. However, if a large number of resources reference the Certificate, the list contains only about the first hundred."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<NameValuePair>,
 }
 impl DeleteCertificateError {
@@ -1320,7 +1481,11 @@ impl DiffDiskSettings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiskEncryptionConfiguration {
     #[doc = "If omitted, no disks on the compute nodes in the pool will be encrypted. On Linux pool, only \"TemporaryDisk\" is supported; on Windows pool, \"OsDisk\" and \"TemporaryDisk\" must be specified."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<String>,
 }
 impl DiskEncryptionConfiguration {
@@ -1390,9 +1555,19 @@ impl ExitCodeRangeMapping {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ExitConditions {
-    #[serde(rename = "exitCodes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exitCodes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exit_codes: Vec<ExitCodeMapping>,
-    #[serde(rename = "exitCodeRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exitCodeRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exit_code_ranges: Vec<ExitCodeRangeMapping>,
     #[serde(rename = "preProcessingError", default, skip_serializing_if = "Option::is_none")]
     pub pre_processing_error: Option<ExitOptions>,
@@ -1506,7 +1681,11 @@ pub struct ImageInformation {
     #[serde(rename = "osType", deserialize_with = "case_insensitive_deserialize")]
     pub os_type: image_information::OsType,
     #[doc = "Not every capability of the Image is listed. Capabilities in this list are considered of special interest and are generally related to integration with other features in the Azure Batch service."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<String>,
     #[serde(rename = "batchSupportEndOfLife", default, with = "azure_core::date::rfc3339::option")]
     pub batch_support_end_of_life: Option<time::OffsetDateTime>,
@@ -1629,7 +1808,12 @@ pub struct InboundNatPool {
     #[serde(rename = "frontendPortRangeEnd")]
     pub frontend_port_range_end: i32,
     #[doc = "The maximum number of rules that can be specified across all the endpoints on a Batch Pool is 25. If no network security group rules are specified, a default rule will be created to allow inbound access to the specified backendPort. If the maximum number of network security group rules is exceeded the request fails with HTTP status code 400."]
-    #[serde(rename = "networkSecurityGroupRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkSecurityGroupRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_security_group_rules: Vec<NetworkSecurityGroupRule>,
 }
 impl InboundNatPool {
@@ -1710,7 +1894,12 @@ pub struct JobAddParameter {
     #[serde(rename = "jobReleaseTask", default, skip_serializing_if = "Option::is_none")]
     pub job_release_task: Option<JobReleaseTask>,
     #[doc = "Individual Tasks can override an environment setting specified here by specifying the same setting name with a different value."]
-    #[serde(rename = "commonEnvironmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonEnvironmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "poolInfo")]
     pub pool_info: PoolInformation,
@@ -1730,7 +1919,11 @@ pub struct JobAddParameter {
     )]
     pub on_task_failure: Option<OnTaskFailure>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(rename = "usesTaskDependencies", default, skip_serializing_if = "Option::is_none")]
     pub uses_task_dependencies: Option<bool>,
@@ -1837,12 +2030,27 @@ pub struct JobManagerTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory. There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
     #[doc = "For multi-instance Tasks, the files will only be uploaded from the Compute Node on which the primary Task is executed."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub constraints: Option<TaskConstraints>,
@@ -1859,7 +2067,12 @@ pub struct JobManagerTask {
     #[serde(rename = "runExclusive", default, skip_serializing_if = "Option::is_none")]
     pub run_exclusive: Option<bool>,
     #[doc = "Application Packages are downloaded and deployed to a shared directory, not the Task working directory. Therefore, if a referenced Application Package is already on the Compute Node, and is up to date, then it is not re-downloaded; the existing copy on the Compute Node is used. If a referenced Application Package cannot be installed, for example because the package has been deleted or because download failed, the Task fails."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[serde(rename = "authenticationTokenSettings", default, skip_serializing_if = "Option::is_none")]
     pub authentication_token_settings: Option<AuthenticationTokenSettings>,
@@ -1922,7 +2135,11 @@ pub struct JobPatchParameter {
     #[serde(rename = "poolInfo", default, skip_serializing_if = "Option::is_none")]
     pub pool_info: Option<PoolInformation>,
     #[doc = "If omitted, the existing Job metadata is left unchanged."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobPatchParameter {
@@ -1960,9 +2177,19 @@ pub struct JobPreparationTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory.  There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub constraints: Option<TaskConstraints>,
@@ -2064,9 +2291,19 @@ pub struct JobReleaseTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "maxWallClockTime", default, skip_serializing_if = "Option::is_none")]
     pub max_wall_clock_time: Option<String>,
@@ -2155,7 +2392,11 @@ pub struct JobScheduleAddParameter {
     #[serde(rename = "jobSpecification")]
     pub job_specification: JobSpecification,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobScheduleAddParameter {
@@ -2192,7 +2433,11 @@ pub struct JobSchedulePatchParameter {
     #[serde(rename = "jobSpecification", default, skip_serializing_if = "Option::is_none")]
     pub job_specification: Option<JobSpecification>,
     #[doc = "If you do not specify this element, existing metadata is left unchanged."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobSchedulePatchParameter {
@@ -2286,7 +2531,11 @@ pub struct JobScheduleUpdateParameter {
     #[serde(rename = "jobSpecification")]
     pub job_specification: JobSpecification,
     #[doc = "If you do not specify this element, it takes the default value of an empty list; in effect, any existing metadata is deleted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobScheduleUpdateParameter {
@@ -2306,7 +2555,11 @@ pub struct JobSchedulingError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<NameValuePair>,
 }
 impl JobSchedulingError {
@@ -2364,12 +2617,21 @@ pub struct JobSpecification {
     #[serde(rename = "jobReleaseTask", default, skip_serializing_if = "Option::is_none")]
     pub job_release_task: Option<JobReleaseTask>,
     #[doc = "Individual Tasks can override an environment setting specified here by specifying the same setting name with a different value."]
-    #[serde(rename = "commonEnvironmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonEnvironmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "poolInfo")]
     pub pool_info: PoolInformation,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl JobSpecification {
@@ -2505,7 +2767,11 @@ pub struct JobUpdateParameter {
     #[serde(rename = "poolInfo")]
     pub pool_info: PoolInformation,
     #[doc = "If omitted, it takes the default value of an empty list; in effect, any existing metadata is deleted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[serde(
         rename = "onAllTasksComplete",
@@ -2582,7 +2848,12 @@ pub struct MultiInstanceSettings {
     #[serde(rename = "coordinationCommandLine")]
     pub coordination_command_line: String,
     #[doc = "The difference between common resource files and Task resource files is that common resource files are downloaded for all subtasks including the primary, whereas Task resource files are downloaded only for the primary. Also note that these resource files are not downloaded to the Task working directory, but instead are downloaded to the Task root directory (one directory above the working directory).  There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "commonResourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "commonResourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub common_resource_files: Vec<ResourceFile>,
 }
 impl MultiInstanceSettings {
@@ -2669,7 +2940,12 @@ pub struct NetworkSecurityGroupRule {
     #[serde(rename = "sourceAddressPrefix")]
     pub source_address_prefix: String,
     #[doc = "Valid values are '*' (for all ports 0 - 65535), a specific port (i.e. 22), or a port range (i.e. 100-200). The ports must be in the range of 0 to 65535. Each entry in this collection must not overlap any other entry (either a range or an individual port). If any other values are provided the request fails with HTTP status code 400. The default value is '*'."]
-    #[serde(rename = "sourcePortRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sourcePortRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub source_port_ranges: Vec<String>,
 }
 impl NetworkSecurityGroupRule {
@@ -2808,7 +3084,11 @@ impl NodeFile {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeFileListResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeFile>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -2969,7 +3249,11 @@ impl NodeVmExtension {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NodeVmExtensionList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<NodeVmExtension>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -3041,7 +3325,12 @@ pub struct OutputFileBlobContainerDestination {
     #[serde(rename = "identityReference", default, skip_serializing_if = "Option::is_none")]
     pub identity_reference: Option<ComputeNodeIdentityReference>,
     #[doc = "These headers will be specified when uploading files to Azure Storage. For more information, see [Request Headers (All Blob Types)](https://docs.microsoft.com/rest/api/storageservices/put-blob#request-headers-all-blob-types)."]
-    #[serde(rename = "uploadHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "uploadHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upload_headers: Vec<HttpHeader>,
 }
 impl OutputFileBlobContainerDestination {
@@ -3125,26 +3414,55 @@ pub struct PoolAddParameter {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. There is a maximum of 10 Package references on any given Pool."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, Pool creation will fail."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
     #[doc = "The default value is 1. The maximum value is the smaller of 4 times the number of cores of the vmSize of the pool or 256."]
     #[serde(rename = "taskSlotsPerNode", default, skip_serializing_if = "Option::is_none")]
     pub task_slots_per_node: Option<i32>,
     #[serde(rename = "taskSchedulingPolicy", default, skip_serializing_if = "Option::is_none")]
     pub task_scheduling_policy: Option<TaskSchedulingPolicy>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[doc = "Mount the storage using Azure fileshare, NFS, CIFS or Blobfuse based file system."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl PoolAddParameter {
@@ -3226,7 +3544,11 @@ impl PoolInformation {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PoolListUsageMetricsResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PoolUsageMetrics>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -3263,7 +3585,11 @@ impl PoolNodeCounts {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PoolNodeCountsListResult {
     #[doc = "A list of Compute Node counts by Pool."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PoolNodeCounts>,
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
     pub odata_next_link: Option<String>,
@@ -3285,13 +3611,27 @@ pub struct PoolPatchParameter {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "If this element is present, it replaces any existing Certificate references configured on the Pool. If omitted, any existing Certificate references are left unchanged. For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. If this element is present, it replaces any existing Package references. If you specify an empty collection, then all Package references are removed from the Pool. If omitted, any existing Package references are left unchanged."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "If this element is present, it replaces any existing metadata configured on the Pool. If you specify an empty collection, any metadata is removed from the Pool. If omitted, any existing metadata is left unchanged."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
 }
 impl PoolPatchParameter {
@@ -3367,21 +3707,50 @@ pub struct PoolSpecification {
     #[serde(rename = "startTask", default, skip_serializing_if = "Option::is_none")]
     pub start_task: Option<StartTask>,
     #[doc = "For Windows Nodes, the Batch service installs the Certificates to the specified Certificate store and location. For Linux Compute Nodes, the Certificates are stored in a directory inside the Task working directory and an environment variable AZ_BATCH_CERTIFICATES_DIR is supplied to the Task to query for this location. For Certificates with visibility of 'remoteUser', a 'certs' directory is created in the user's home directory (e.g., /home/{user-name}/certs) and Certificates are placed in that directory."]
-    #[serde(rename = "certificateReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "certificateReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub certificate_references: Vec<CertificateReference>,
     #[doc = "Changes to Package references affect all new Nodes joining the Pool, but do not affect Compute Nodes that are already in the Pool until they are rebooted or reimaged. There is a maximum of 10 Package references on any given Pool."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[doc = "The list of application licenses must be a subset of available Batch service application licenses. If a license is requested which is not supported, Pool creation will fail. The permitted licenses available on the Pool are 'maya', 'vray', '3dsmax', 'arnold'. An additional charge applies for each application license added to the Pool."]
-    #[serde(rename = "applicationLicenses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationLicenses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_licenses: Vec<String>,
-    #[serde(rename = "userAccounts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "userAccounts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub user_accounts: Vec<UserAccount>,
     #[doc = "The Batch service does not assign any meaning to metadata; it is solely for the use of user code."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub metadata: Vec<MetadataItem>,
     #[doc = "This supports Azure Files, NFS, CIFS/SMB, and Blobfuse."]
-    #[serde(rename = "mountConfiguration", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mountConfiguration",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub mount_configuration: Vec<MountConfiguration>,
 }
 impl PoolSpecification {
@@ -3503,7 +3872,12 @@ pub struct PublicIpAddressConfiguration {
     )]
     pub provision: Option<IpAddressProvisioningType>,
     #[doc = "The number of IPs specified here limits the maximum size of the Pool - 100 dedicated nodes or 100 Spot/Low-priority nodes can be allocated for each public IP. For example, a pool needing 250 dedicated VMs would need at least 3 public IPs specified. Each element of this collection is of the form: /subscriptions/{subscription}/resourceGroups/{group}/providers/Microsoft.Network/publicIPAddresses/{ip}."]
-    #[serde(rename = "ipAddressIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipAddressIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ip_address_ids: Vec<String>,
 }
 impl PublicIpAddressConfiguration {
@@ -3529,7 +3903,11 @@ pub struct ResizeError {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<NameValuePair>,
 }
 impl ResizeError {
@@ -3657,9 +4035,19 @@ pub struct StartTask {
     #[serde(rename = "containerSettings", default, skip_serializing_if = "Option::is_none")]
     pub container_settings: Option<TaskContainerSettings>,
     #[doc = "Files listed under this element are located in the Task's working directory."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[doc = "Specify either the userName or autoUser property, but not both."]
     #[serde(rename = "userIdentity", default, skip_serializing_if = "Option::is_none")]
@@ -3815,7 +4203,11 @@ impl TaskAddCollectionParameter {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskAddCollectionResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TaskAddResult>,
 }
 impl TaskAddCollectionResult {
@@ -3839,12 +4231,27 @@ pub struct TaskAddParameter {
     #[serde(rename = "exitConditions", default, skip_serializing_if = "Option::is_none")]
     pub exit_conditions: Option<ExitConditions>,
     #[doc = "For multi-instance Tasks, the resource files will only be downloaded to the Compute Node on which the primary Task is executed. There is a maximum size for the list of resource files.  When the max size is exceeded, the request will fail and the response error code will be RequestEntityTooLarge. If this occurs, the collection of ResourceFiles must be reduced in size. This can be achieved using .zip files, Application Packages, or Docker Containers."]
-    #[serde(rename = "resourceFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_files: Vec<ResourceFile>,
     #[doc = "For multi-instance Tasks, the files will only be uploaded from the Compute Node on which the primary Task is executed."]
-    #[serde(rename = "outputFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_files: Vec<OutputFile>,
-    #[serde(rename = "environmentSettings", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentSettings",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_settings: Vec<EnvironmentSetting>,
     #[serde(rename = "affinityInfo", default, skip_serializing_if = "Option::is_none")]
     pub affinity_info: Option<AffinityInformation>,
@@ -3862,7 +4269,12 @@ pub struct TaskAddParameter {
     #[serde(rename = "dependsOn", default, skip_serializing_if = "Option::is_none")]
     pub depends_on: Option<TaskDependencies>,
     #[doc = "Application packages are downloaded and deployed to a shared directory, not the Task working directory. Therefore, if a referenced package is already on the Node, and is up to date, then it is not re-downloaded; the existing copy on the Compute Node is used. If a referenced Package cannot be installed, for example because the package has been deleted or because download failed, the Task fails."]
-    #[serde(rename = "applicationPackageReferences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicationPackageReferences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_package_references: Vec<ApplicationPackageReference>,
     #[serde(rename = "authenticationTokenSettings", default, skip_serializing_if = "Option::is_none")]
     pub authentication_token_settings: Option<AuthenticationTokenSettings>,
@@ -4039,9 +4451,19 @@ impl TaskCountsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TaskDependencies {
     #[doc = "The taskIds collection is limited to 64000 characters total (i.e. the combined length of all Task IDs). If the taskIds collection exceeds the maximum length, the Add Task request fails with error code TaskDependencyListTooLong. In this case consider using Task ID ranges instead."]
-    #[serde(rename = "taskIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "taskIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub task_ids: Vec<String>,
-    #[serde(rename = "taskIdRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "taskIdRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub task_id_ranges: Vec<TaskIdRange>,
 }
 impl TaskDependencies {
@@ -4114,7 +4536,11 @@ pub struct TaskFailureInformation {
     pub code: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<NameValuePair>,
 }
 impl TaskFailureInformation {
@@ -4420,7 +4846,12 @@ pub struct VmExtension {
     #[serde(rename = "protectedSettings", default, skip_serializing_if = "Option::is_none")]
     pub protected_settings: Option<serde_json::Value>,
     #[doc = "Collection of extension names after which this extension needs to be provisioned."]
-    #[serde(rename = "provisionAfterExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "provisionAfterExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub provision_after_extensions: Vec<String>,
 }
 impl VmExtension {
@@ -4442,10 +4873,19 @@ pub struct VmExtensionInstanceView {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The resource status information."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statuses: Vec<InstanceViewStatus>,
     #[doc = "The resource status information."]
-    #[serde(rename = "subStatuses", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subStatuses",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_statuses: Vec<InstanceViewStatus>,
 }
 impl VmExtensionInstanceView {
@@ -4463,7 +4903,12 @@ pub struct VirtualMachineConfiguration {
     #[serde(rename = "windowsConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub windows_configuration: Option<WindowsConfiguration>,
     #[doc = "This property must be specified if the Compute Nodes in the Pool need to have empty data disks attached to them. This cannot be updated. Each Compute Node gets its own disk (the disk is not a file share). Existing disks cannot be attached, each attached disk is empty. When the Compute Node is removed from the Pool, the disk and all data associated with it is also deleted. The disk is not formatted after being attached, it must be formatted before use - for more information see https://docs.microsoft.com/en-us/azure/virtual-machines/linux/classic/attach-disk#initialize-a-new-data-disk-in-linux and https://docs.microsoft.com/en-us/azure/virtual-machines/windows/attach-disk-ps#add-an-empty-data-disk-to-a-virtual-machine."]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
     #[doc = "This only applies to Images that contain the Windows operating system, and should only be used when you hold valid on-premises licenses for the Compute Nodes which will be deployed. If omitted, no on-premises licensing discount is applied. Values are:\n\n Windows_Server - The on-premises license is for Windows Server.\n Windows_Client - The on-premises license is for Windows Client.\n"]
     #[serde(rename = "licenseType", default, skip_serializing_if = "Option::is_none")]
@@ -4477,7 +4922,11 @@ pub struct VirtualMachineConfiguration {
     #[serde(rename = "nodePlacementConfiguration", default, skip_serializing_if = "Option::is_none")]
     pub node_placement_configuration: Option<NodePlacementConfiguration>,
     #[doc = "If specified, the extensions mentioned in this configuration will be installed on each node."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<VmExtension>,
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
diff --git a/services/svc/blobstorage/src/package_2020_10/models.rs b/services/svc/blobstorage/src/package_2020_10/models.rs
index da790b10cb..49754354d8 100644
--- a/services/svc/blobstorage/src/package_2020_10/models.rs
+++ b/services/svc/blobstorage/src/package_2020_10/models.rs
@@ -174,7 +174,12 @@ impl BlobFlatListSegment {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct BlobHierarchyListSegment {
-    #[serde(rename = "BlobPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "BlobPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_prefixes: Vec<BlobPrefix>,
     #[serde(rename = "BlobItems")]
     pub blob_items: Vec<BlobItemInternal>,
@@ -470,11 +475,26 @@ pub mod block_list {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlockLookupList {
-    #[serde(rename = "Committed", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Committed",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub committed: Vec<String>,
-    #[serde(rename = "Uncommitted", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Uncommitted",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub uncommitted: Vec<String>,
-    #[serde(rename = "Latest", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Latest",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub latest: Vec<String>,
 }
 impl BlockLookupList {
@@ -1299,9 +1319,19 @@ impl ObjectReplicationMetadata {
 #[doc = "the list of pages"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageList {
-    #[serde(rename = "PageRange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PageRange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub page_range: Vec<PageRange>,
-    #[serde(rename = "ClearRange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ClearRange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_range: Vec<ClearRange>,
     #[serde(rename = "NextMarker", default, skip_serializing_if = "Option::is_none")]
     pub next_marker: Option<String>,
diff --git a/services/svc/blobstorage/src/package_2020_12/models.rs b/services/svc/blobstorage/src/package_2020_12/models.rs
index da790b10cb..49754354d8 100644
--- a/services/svc/blobstorage/src/package_2020_12/models.rs
+++ b/services/svc/blobstorage/src/package_2020_12/models.rs
@@ -174,7 +174,12 @@ impl BlobFlatListSegment {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct BlobHierarchyListSegment {
-    #[serde(rename = "BlobPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "BlobPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_prefixes: Vec<BlobPrefix>,
     #[serde(rename = "BlobItems")]
     pub blob_items: Vec<BlobItemInternal>,
@@ -470,11 +475,26 @@ pub mod block_list {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlockLookupList {
-    #[serde(rename = "Committed", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Committed",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub committed: Vec<String>,
-    #[serde(rename = "Uncommitted", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Uncommitted",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub uncommitted: Vec<String>,
-    #[serde(rename = "Latest", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Latest",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub latest: Vec<String>,
 }
 impl BlockLookupList {
@@ -1299,9 +1319,19 @@ impl ObjectReplicationMetadata {
 #[doc = "the list of pages"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageList {
-    #[serde(rename = "PageRange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PageRange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub page_range: Vec<PageRange>,
-    #[serde(rename = "ClearRange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ClearRange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_range: Vec<ClearRange>,
     #[serde(rename = "NextMarker", default, skip_serializing_if = "Option::is_none")]
     pub next_marker: Option<String>,
diff --git a/services/svc/blobstorage/src/package_2021_02/models.rs b/services/svc/blobstorage/src/package_2021_02/models.rs
index 650d395d2c..e130ce8d63 100644
--- a/services/svc/blobstorage/src/package_2021_02/models.rs
+++ b/services/svc/blobstorage/src/package_2021_02/models.rs
@@ -174,7 +174,12 @@ impl BlobFlatListSegment {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct BlobHierarchyListSegment {
-    #[serde(rename = "BlobPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "BlobPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_prefixes: Vec<BlobPrefix>,
     #[serde(rename = "BlobItems")]
     pub blob_items: Vec<BlobItemInternal>,
@@ -484,11 +489,26 @@ pub mod block_list {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlockLookupList {
-    #[serde(rename = "Committed", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Committed",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub committed: Vec<String>,
-    #[serde(rename = "Uncommitted", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Uncommitted",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub uncommitted: Vec<String>,
-    #[serde(rename = "Latest", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Latest",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub latest: Vec<String>,
 }
 impl BlockLookupList {
@@ -1313,9 +1333,19 @@ impl ObjectReplicationMetadata {
 #[doc = "the list of pages"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageList {
-    #[serde(rename = "PageRange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PageRange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub page_range: Vec<PageRange>,
-    #[serde(rename = "ClearRange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ClearRange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_range: Vec<ClearRange>,
     #[serde(rename = "NextMarker", default, skip_serializing_if = "Option::is_none")]
     pub next_marker: Option<String>,
diff --git a/services/svc/blobstorage/src/package_2021_04/models.rs b/services/svc/blobstorage/src/package_2021_04/models.rs
index 650d395d2c..e130ce8d63 100644
--- a/services/svc/blobstorage/src/package_2021_04/models.rs
+++ b/services/svc/blobstorage/src/package_2021_04/models.rs
@@ -174,7 +174,12 @@ impl BlobFlatListSegment {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct BlobHierarchyListSegment {
-    #[serde(rename = "BlobPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "BlobPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_prefixes: Vec<BlobPrefix>,
     #[serde(rename = "BlobItems")]
     pub blob_items: Vec<BlobItemInternal>,
@@ -484,11 +489,26 @@ pub mod block_list {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlockLookupList {
-    #[serde(rename = "Committed", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Committed",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub committed: Vec<String>,
-    #[serde(rename = "Uncommitted", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Uncommitted",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub uncommitted: Vec<String>,
-    #[serde(rename = "Latest", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Latest",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub latest: Vec<String>,
 }
 impl BlockLookupList {
@@ -1313,9 +1333,19 @@ impl ObjectReplicationMetadata {
 #[doc = "the list of pages"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageList {
-    #[serde(rename = "PageRange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PageRange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub page_range: Vec<PageRange>,
-    #[serde(rename = "ClearRange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ClearRange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_range: Vec<ClearRange>,
     #[serde(rename = "NextMarker", default, skip_serializing_if = "Option::is_none")]
     pub next_marker: Option<String>,
diff --git a/services/svc/blobstorage/src/package_2021_08/models.rs b/services/svc/blobstorage/src/package_2021_08/models.rs
index 1d22a7082a..f9a0ad4f3d 100644
--- a/services/svc/blobstorage/src/package_2021_08/models.rs
+++ b/services/svc/blobstorage/src/package_2021_08/models.rs
@@ -174,7 +174,12 @@ impl BlobFlatListSegment {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct BlobHierarchyListSegment {
-    #[serde(rename = "BlobPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "BlobPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_prefixes: Vec<BlobPrefix>,
     #[serde(rename = "BlobItems")]
     pub blob_items: Vec<BlobItemInternal>,
@@ -484,11 +489,26 @@ pub mod block_list {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BlockLookupList {
-    #[serde(rename = "Committed", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Committed",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub committed: Vec<String>,
-    #[serde(rename = "Uncommitted", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Uncommitted",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub uncommitted: Vec<String>,
-    #[serde(rename = "Latest", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Latest",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub latest: Vec<String>,
 }
 impl BlockLookupList {
@@ -1319,9 +1339,19 @@ impl ObjectReplicationMetadata {
 #[doc = "the list of pages"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageList {
-    #[serde(rename = "PageRange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PageRange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub page_range: Vec<PageRange>,
-    #[serde(rename = "ClearRange", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ClearRange",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_range: Vec<ClearRange>,
     #[serde(rename = "NextMarker", default, skip_serializing_if = "Option::is_none")]
     pub next_marker: Option<String>,
diff --git a/services/svc/containerregistry/src/package_2018_08/models.rs b/services/svc/containerregistry/src/package_2018_08/models.rs
index 80be7c4c6f..d7e160db5d 100644
--- a/services/svc/containerregistry/src/package_2018_08/models.rs
+++ b/services/svc/containerregistry/src/package_2018_08/models.rs
@@ -25,7 +25,11 @@ impl AcrErrorInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AcrErrors {
     #[doc = "Array of detailed error"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<AcrErrorInfo>,
 }
 impl AcrErrors {
@@ -73,7 +77,11 @@ pub struct AcrManifestAttributesBase {
     #[serde(rename = "mediaType", default, skip_serializing_if = "Option::is_none")]
     pub media_type: Option<String>,
     #[doc = "List of tags"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[serde(rename = "changeableAttributes", default, skip_serializing_if = "Option::is_none")]
     pub changeable_attributes: Option<ChangeableAttributes>,
@@ -93,7 +101,11 @@ pub struct AcrManifests {
     #[serde(rename = "imageName", default, skip_serializing_if = "Option::is_none")]
     pub image_name: Option<String>,
     #[doc = "List of manifests"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manifests: Vec<AcrManifestAttributesBase>,
 }
 impl AcrManifests {
@@ -111,7 +123,11 @@ pub struct AcrRepositoryTags {
     #[serde(rename = "imageName", default, skip_serializing_if = "Option::is_none")]
     pub image_name: Option<String>,
     #[doc = "List of tag attribute details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<AcrTagAttributesBase>,
 }
 impl AcrRepositoryTags {
@@ -187,10 +203,20 @@ impl ChangeableAttributes {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedRepository {
     #[doc = "SHA of the deleted image"]
-    #[serde(rename = "manifestsDeleted", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "manifestsDeleted",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manifests_deleted: Vec<String>,
     #[doc = "Tag of the deleted image"]
-    #[serde(rename = "tagsDeleted", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tagsDeleted",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags_deleted: Vec<String>,
 }
 impl DeletedRepository {
@@ -295,13 +321,26 @@ pub struct Manifest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tag: Option<String>,
     #[doc = "List of layer information"]
-    #[serde(rename = "fsLayers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fsLayers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fs_layers: Vec<ImageLayer>,
     #[doc = "Image history"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub history: Vec<ImageHistory>,
     #[doc = "Image signature"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub signatures: Vec<ImageSignature>,
 }
 impl Manifest {
@@ -313,7 +352,11 @@ impl Manifest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManifestAttributesManifest {
     #[doc = "List of manifest attributes details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub references: Vec<ManifestAttributesManifestReferences>,
     #[doc = "Quarantine tag name"]
     #[serde(rename = "quarantineTag", default, skip_serializing_if = "Option::is_none")]
@@ -373,7 +416,11 @@ impl ManifestChangeableAttributes {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Repositories {
     #[doc = "Repository names"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub repositories: Vec<String>,
 }
 impl Repositories {
@@ -417,7 +464,11 @@ pub struct RepositoryTags {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of tags"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
 }
 impl RepositoryTags {
diff --git a/services/svc/containerregistry/src/package_2019_07/models.rs b/services/svc/containerregistry/src/package_2019_07/models.rs
index 39b92794c4..5aa7e1c6a2 100644
--- a/services/svc/containerregistry/src/package_2019_07/models.rs
+++ b/services/svc/containerregistry/src/package_2019_07/models.rs
@@ -36,7 +36,11 @@ impl AcrErrorInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AcrErrors {
     #[doc = "Array of detailed error"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<AcrErrorInfo>,
 }
 impl AcrErrors {
@@ -90,7 +94,11 @@ pub struct AcrManifestAttributesBase {
     #[serde(rename = "configMediaType", default, skip_serializing_if = "Option::is_none")]
     pub config_media_type: Option<String>,
     #[doc = "List of tags"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[serde(rename = "changeableAttributes", default, skip_serializing_if = "Option::is_none")]
     pub changeable_attributes: Option<ChangeableAttributes>,
@@ -110,7 +118,11 @@ pub struct AcrManifests {
     #[serde(rename = "imageName", default, skip_serializing_if = "Option::is_none")]
     pub image_name: Option<String>,
     #[doc = "List of manifests"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manifests: Vec<AcrManifestAttributesBase>,
 }
 impl AcrManifests {
@@ -128,7 +140,11 @@ pub struct AcrRepositoryTags {
     #[serde(rename = "imageName", default, skip_serializing_if = "Option::is_none")]
     pub image_name: Option<String>,
     #[doc = "List of tag attribute details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<AcrTagAttributesBase>,
 }
 impl AcrRepositoryTags {
@@ -204,10 +220,20 @@ impl ChangeableAttributes {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedRepository {
     #[doc = "SHA of the deleted image"]
-    #[serde(rename = "manifestsDeleted", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "manifestsDeleted",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manifests_deleted: Vec<String>,
     #[doc = "Tag of the deleted image"]
-    #[serde(rename = "tagsDeleted", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tagsDeleted",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags_deleted: Vec<String>,
 }
 impl DeletedRepository {
@@ -309,7 +335,11 @@ pub struct Manifest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub config: Option<V2Descriptor>,
     #[doc = "List of V2 image layer information"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<V2Descriptor>,
     #[doc = "CPU architecture"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -321,13 +351,26 @@ pub struct Manifest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tag: Option<String>,
     #[doc = "List of layer information"]
-    #[serde(rename = "fsLayers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fsLayers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fs_layers: Vec<FsLayer>,
     #[doc = "Image history"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub history: Vec<History>,
     #[doc = "Image signature"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub signatures: Vec<ImageSignature>,
 }
 impl Manifest {
@@ -339,7 +382,11 @@ impl Manifest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManifestAttributesManifest {
     #[doc = "List of manifest attributes details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub references: Vec<ManifestAttributesManifestReferences>,
     #[doc = "Quarantine tag name"]
     #[serde(rename = "quarantineTag", default, skip_serializing_if = "Option::is_none")]
@@ -410,7 +457,11 @@ impl RefreshToken {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Repositories {
     #[doc = "Repository names"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub repositories: Vec<String>,
 }
 impl Repositories {
@@ -454,7 +505,11 @@ pub struct RepositoryTags {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of tags"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
 }
 impl RepositoryTags {
diff --git a/services/svc/containerregistry/src/package_2019_08/models.rs b/services/svc/containerregistry/src/package_2019_08/models.rs
index 81a33aa5b7..d8746fcec5 100644
--- a/services/svc/containerregistry/src/package_2019_08/models.rs
+++ b/services/svc/containerregistry/src/package_2019_08/models.rs
@@ -36,7 +36,11 @@ impl AcrErrorInfo {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AcrErrors {
     #[doc = "Array of detailed error"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<AcrErrorInfo>,
 }
 impl AcrErrors {
@@ -54,7 +58,11 @@ pub struct AcrManifests {
     #[serde(rename = "imageName", default, skip_serializing_if = "Option::is_none")]
     pub image_name: Option<String>,
     #[doc = "List of manifests"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manifests: Vec<ManifestAttributesBase>,
 }
 impl AcrManifests {
@@ -115,10 +123,20 @@ impl Annotations {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedRepository {
     #[doc = "SHA of the deleted image"]
-    #[serde(rename = "manifestsDeleted", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "manifestsDeleted",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manifests_deleted: Vec<String>,
     #[doc = "Tag of the deleted image"]
-    #[serde(rename = "tagsDeleted", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tagsDeleted",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags_deleted: Vec<String>,
 }
 impl DeletedRepository {
@@ -139,7 +157,11 @@ pub struct Descriptor {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub digest: Option<String>,
     #[doc = "Specifies a list of URIs from which this object may be downloaded."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub urls: Vec<String>,
     #[doc = "Additional information provided through arbitrary metadata."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -289,7 +311,11 @@ pub struct ManifestAttributesBase {
     #[serde(rename = "configMediaType", default, skip_serializing_if = "Option::is_none")]
     pub config_media_type: Option<String>,
     #[doc = "List of tags"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
     #[doc = "Changeable attributes"]
     #[serde(rename = "changeableAttributes", default, skip_serializing_if = "Option::is_none")]
@@ -304,7 +330,11 @@ impl ManifestAttributesBase {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManifestAttributesManifest {
     #[doc = "List of manifest attributes details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub references: Vec<ManifestAttributesManifestReferences>,
     #[doc = "Quarantine tag name"]
     #[serde(rename = "quarantineTag", default, skip_serializing_if = "Option::is_none")]
@@ -369,7 +399,11 @@ pub struct ManifestList {
     #[serde(rename = "mediaType", default, skip_serializing_if = "Option::is_none")]
     pub media_type: Option<String>,
     #[doc = "List of V2 image layer information"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manifests: Vec<ManifestListAttributes>,
 }
 impl ManifestList {
@@ -406,13 +440,21 @@ pub struct ManifestWrapper {
     #[serde(rename = "mediaType", default, skip_serializing_if = "Option::is_none")]
     pub media_type: Option<String>,
     #[doc = "(ManifestList, OCIIndex) List of V2 image layer information"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manifests: Vec<ManifestListAttributes>,
     #[doc = "Docker V2 image layer descriptor including config and layers"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub config: Option<Descriptor>,
     #[doc = "(V2, OCI) List of V2 image layer information"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<Descriptor>,
     #[doc = "Additional information provided through arbitrary metadata."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -427,13 +469,26 @@ pub struct ManifestWrapper {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tag: Option<String>,
     #[doc = "(V1) List of layer information"]
-    #[serde(rename = "fsLayers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fsLayers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fs_layers: Vec<FsLayer>,
     #[doc = "(V1) Image history"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub history: Vec<History>,
     #[doc = "(V1) Image signature"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub signatures: Vec<ImageSignature>,
 }
 impl ManifestWrapper {
@@ -447,7 +502,11 @@ pub struct OciIndex {
     #[serde(flatten)]
     pub manifest: Manifest,
     #[doc = "List of OCI image layer information"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub manifests: Vec<ManifestListAttributes>,
     #[doc = "Additional information provided through arbitrary metadata."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -467,7 +526,11 @@ pub struct OciManifest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub config: Option<Descriptor>,
     #[doc = "List of V2 image layer information"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<Descriptor>,
     #[doc = "Additional information provided through arbitrary metadata."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -491,13 +554,22 @@ pub struct Platform {
     #[serde(rename = "os.version", default, skip_serializing_if = "Option::is_none")]
     pub os_version: Option<String>,
     #[doc = "The optional os.features field specifies an array of strings, each listing a required OS feature (for example on Windows win32k"]
-    #[serde(rename = "os.features", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "os.features",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub os_features: Vec<String>,
     #[doc = "The optional variant field specifies a variant of the CPU, for example armv6l to specify a particular CPU variant of the ARM CPU."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub variant: Option<String>,
     #[doc = "The optional features field specifies an array of strings, each listing a required CPU feature (for example sse4 or aes"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub features: Vec<String>,
 }
 impl Platform {
@@ -520,7 +592,11 @@ impl RefreshToken {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Repositories {
     #[doc = "Repository names"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub repositories: Vec<String>,
 }
 impl Repositories {
@@ -589,7 +665,11 @@ pub struct RepositoryTags {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "List of tags"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
 }
 impl RepositoryTags {
@@ -683,7 +763,11 @@ pub struct TagList {
     #[serde(rename = "imageName", default, skip_serializing_if = "Option::is_none")]
     pub image_name: Option<String>,
     #[doc = "List of tag attribute details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<TagAttributesBase>,
 }
 impl TagList {
@@ -706,13 +790,26 @@ pub struct V1Manifest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tag: Option<String>,
     #[doc = "List of layer information"]
-    #[serde(rename = "fsLayers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fsLayers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fs_layers: Vec<FsLayer>,
     #[doc = "Image history"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub history: Vec<History>,
     #[doc = "Image signature"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub signatures: Vec<ImageSignature>,
 }
 impl V1Manifest {
@@ -732,7 +829,11 @@ pub struct V2Manifest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub config: Option<Descriptor>,
     #[doc = "List of V2 image layer information"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub layers: Vec<Descriptor>,
 }
 impl V2Manifest {
diff --git a/services/svc/cosmosdb/src/package_2019_02/models.rs b/services/svc/cosmosdb/src/package_2019_02/models.rs
index d5ba64bee9..7a21ff63d9 100644
--- a/services/svc/cosmosdb/src/package_2019_02/models.rs
+++ b/services/svc/cosmosdb/src/package_2019_02/models.rs
@@ -218,7 +218,11 @@ pub struct TableEntityQueryResponse {
     #[serde(rename = "odata.metadata", default, skip_serializing_if = "Option::is_none")]
     pub odata_metadata: Option<String>,
     #[doc = "List of table entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TableEntityProperties>,
 }
 impl TableEntityQueryResponse {
@@ -245,7 +249,11 @@ pub struct TableQueryResponse {
     #[serde(rename = "odata.metadata", default, skip_serializing_if = "Option::is_none")]
     pub odata_metadata: Option<String>,
     #[doc = "List of tables."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TableResponseProperties>,
 }
 impl TableQueryResponse {
diff --git a/services/svc/datalakeanalytics/src/package_catalog_2016_11/models.rs b/services/svc/datalakeanalytics/src/package_catalog_2016_11/models.rs
index 1c0651410d..0636a6af3e 100644
--- a/services/svc/datalakeanalytics/src/package_catalog_2016_11/models.rs
+++ b/services/svc/datalakeanalytics/src/package_catalog_2016_11/models.rs
@@ -299,7 +299,11 @@ pub struct AclList {
     #[serde(flatten)]
     pub catalog_item_list: CatalogItemList,
     #[doc = "the access control list (ACL)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Acl>,
 }
 impl azure_core::Continuable for AclList {
@@ -490,10 +494,18 @@ pub struct USqlAssembly {
     #[serde(rename = "isUserDefined", default, skip_serializing_if = "Option::is_none")]
     pub is_user_defined: Option<bool>,
     #[doc = "the list of files associated with the assembly"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<USqlAssemblyFileInfo>,
     #[doc = "the list of dependencies associated with the assembly"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dependencies: Vec<USqlAssemblyDependencyInfo>,
 }
 impl USqlAssembly {
@@ -599,7 +611,11 @@ pub struct USqlAssemblyList {
     #[serde(flatten)]
     pub catalog_item_list: CatalogItemList,
     #[doc = "the list of assemblies in the database"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<USqlAssemblyClr>,
 }
 impl azure_core::Continuable for USqlAssemblyList {
@@ -633,7 +649,11 @@ pub struct USqlCredentialList {
     #[serde(flatten)]
     pub catalog_item_list: CatalogItemList,
     #[doc = "the list of credentials in the database"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<USqlCredential>,
 }
 impl azure_core::Continuable for USqlCredentialList {
@@ -667,7 +687,11 @@ pub struct USqlDatabaseList {
     #[serde(flatten)]
     pub catalog_item_list: CatalogItemList,
     #[doc = "the list of databases"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<USqlDatabase>,
 }
 impl azure_core::Continuable for USqlDatabaseList {
@@ -703,7 +727,11 @@ pub struct USqlDistributionInfo {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<i32>,
     #[doc = "the list of directed columns in the distribution"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keys: Vec<USqlDirectedColumn>,
     #[doc = "the count of indices using this distribution."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -735,7 +763,12 @@ pub struct USqlExternalDataSource {
     #[serde(rename = "providerString", default, skip_serializing_if = "Option::is_none")]
     pub provider_string: Option<String>,
     #[doc = "the list of types to push down from the external data source."]
-    #[serde(rename = "pushdownTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pushdownTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pushdown_types: Vec<String>,
 }
 impl USqlExternalDataSource {
@@ -749,7 +782,11 @@ pub struct USqlExternalDataSourceList {
     #[serde(flatten)]
     pub catalog_item_list: CatalogItemList,
     #[doc = "the list of external data sources in the database"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<USqlExternalDataSource>,
 }
 impl azure_core::Continuable for USqlExternalDataSourceList {
@@ -770,10 +807,19 @@ pub struct USqlIndex {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "the list of directed columns in the index"]
-    #[serde(rename = "indexKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "indexKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub index_keys: Vec<USqlDirectedColumn>,
     #[doc = "the list of columns in the index"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<String>,
     #[doc = "A Data Lake Analytics catalog U-SQL distribution information object."]
     #[serde(rename = "distributionInfo", default, skip_serializing_if = "Option::is_none")]
@@ -782,10 +828,20 @@ pub struct USqlIndex {
     #[serde(rename = "partitionFunction", default, skip_serializing_if = "Option::is_none")]
     pub partition_function: Option<String>,
     #[doc = "the list of partition keys in the index"]
-    #[serde(rename = "partitionKeyList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionKeyList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_key_list: Vec<String>,
     #[doc = "the list of full paths to the streams that contain this index in the DataLake account."]
-    #[serde(rename = "streamNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "streamNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub stream_names: Vec<String>,
     #[doc = "the switch indicating if this index is a columnstore index."]
     #[serde(rename = "isColumnstore", default, skip_serializing_if = "Option::is_none")]
@@ -831,7 +887,11 @@ pub struct USqlPackageList {
     #[serde(flatten)]
     pub catalog_item_list: CatalogItemList,
     #[doc = "the list of packages in the database and schema combination"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<USqlPackage>,
 }
 impl azure_core::Continuable for USqlPackageList {
@@ -874,7 +934,11 @@ pub struct USqlProcedureList {
     #[serde(flatten)]
     pub catalog_item_list: CatalogItemList,
     #[doc = "the list of procedure in the database and schema combination"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<USqlProcedure>,
 }
 impl azure_core::Continuable for USqlProcedureList {
@@ -911,7 +975,11 @@ pub struct USqlSchemaList {
     #[serde(flatten)]
     pub catalog_item_list: CatalogItemList,
     #[doc = "the list of schemas in the database"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<USqlSchema>,
 }
 impl azure_core::Continuable for USqlSchemaList {
@@ -966,13 +1034,28 @@ pub struct USqlTable {
     #[serde(rename = "tableName", default, skip_serializing_if = "Option::is_none")]
     pub table_name: Option<String>,
     #[doc = "the list of columns in this table"]
-    #[serde(rename = "columnList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "columnList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub column_list: Vec<USqlTableColumn>,
     #[doc = "the list of indices in this table"]
-    #[serde(rename = "indexList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "indexList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub index_list: Vec<USqlIndex>,
     #[doc = "the list of partition keys in the table"]
-    #[serde(rename = "partitionKeyList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partitionKeyList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_key_list: Vec<String>,
     #[doc = "A Data Lake Analytics catalog external table item."]
     #[serde(rename = "externalTable", default, skip_serializing_if = "Option::is_none")]
@@ -1037,7 +1120,11 @@ pub struct USqlTableFragmentList {
     #[serde(flatten)]
     pub catalog_item_list: CatalogItemList,
     #[doc = "the list of table fragments in the database, schema and table combination"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<USqlTableFragment>,
 }
 impl azure_core::Continuable for USqlTableFragmentList {
@@ -1057,7 +1144,11 @@ pub struct USqlTableList {
     #[serde(flatten)]
     pub catalog_item_list: CatalogItemList,
     #[doc = "the list of tables in the database and schema combination"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<USqlTable>,
 }
 impl azure_core::Continuable for USqlTableList {
@@ -1092,7 +1183,11 @@ pub struct USqlTablePartition {
     #[serde(rename = "indexId", default, skip_serializing_if = "Option::is_none")]
     pub index_id: Option<i32>,
     #[doc = "the list of labels associated with this partition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub label: Vec<String>,
     #[doc = "the creation time of the partition"]
     #[serde(rename = "createDate", default, with = "azure_core::date::rfc3339::option")]
@@ -1109,7 +1204,11 @@ pub struct USqlTablePartitionList {
     #[serde(flatten)]
     pub catalog_item_list: CatalogItemList,
     #[doc = "the list of table partitions in the database, schema and table combination"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<USqlTablePartition>,
 }
 impl azure_core::Continuable for USqlTablePartitionList {
@@ -1133,13 +1232,21 @@ pub struct USqlTablePreview {
     #[serde(rename = "totalColumnCount", default, skip_serializing_if = "Option::is_none")]
     pub total_column_count: Option<i64>,
     #[doc = "the rows of the table or partition preview, where each row is an array of string representations the row's values. Note: Byte arrays will appear as base-64 encoded values, SqlMap and SqlArray objects will appear as escaped JSON objects, and DateTime objects will appear as ISO formatted UTC date-times."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub rows: Vec<Vec<String>>,
     #[doc = "true if the amount of data in the response is less than expected due to the preview operation's size limitations. This can occur if the requested rows or row counts are too large."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub truncated: Option<bool>,
     #[doc = "the schema of the table or partition."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schema: Vec<USqlTableColumn>,
 }
 impl USqlTablePreview {
@@ -1189,7 +1296,12 @@ pub struct USqlTableStatistics {
     #[serde(rename = "filterDefinition", default, skip_serializing_if = "Option::is_none")]
     pub filter_definition: Option<String>,
     #[doc = "the list of column names associated with these statistics."]
-    #[serde(rename = "colNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "colNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub col_names: Vec<String>,
 }
 impl USqlTableStatistics {
@@ -1203,7 +1315,11 @@ pub struct USqlTableStatisticsList {
     #[serde(flatten)]
     pub catalog_item_list: CatalogItemList,
     #[doc = "the list of table statistics in the database, schema and table combination"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<USqlTableStatistics>,
 }
 impl azure_core::Continuable for USqlTableStatisticsList {
@@ -1223,7 +1339,11 @@ pub struct USqlTableType {
     #[serde(flatten)]
     pub u_sql_type: USqlType,
     #[doc = "the type field information associated with this table type."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<TypeFieldInfo>,
 }
 impl USqlTableType {
@@ -1237,7 +1357,11 @@ pub struct USqlTableTypeList {
     #[serde(flatten)]
     pub catalog_item_list: CatalogItemList,
     #[doc = "the list of table types in the database and schema combination"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<USqlTableType>,
 }
 impl azure_core::Continuable for USqlTableTypeList {
@@ -1280,7 +1404,11 @@ pub struct USqlTableValuedFunctionList {
     #[serde(flatten)]
     pub catalog_item_list: CatalogItemList,
     #[doc = "the list of table valued functions in the database and schema combination"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<USqlTableValuedFunction>,
 }
 impl azure_core::Continuable for USqlTableValuedFunctionList {
@@ -1356,7 +1484,11 @@ pub struct USqlTypeList {
     #[serde(flatten)]
     pub catalog_item_list: CatalogItemList,
     #[doc = "the list of types in the database and schema combination"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<USqlType>,
 }
 impl azure_core::Continuable for USqlTypeList {
@@ -1399,7 +1531,11 @@ pub struct USqlViewList {
     #[serde(flatten)]
     pub catalog_item_list: CatalogItemList,
     #[doc = "the list of view in the database and schema combination"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<USqlView>,
 }
 impl azure_core::Continuable for USqlViewList {
diff --git a/services/svc/datalakeanalytics/src/package_job_2015_11_preview/models.rs b/services/svc/datalakeanalytics/src/package_job_2015_11_preview/models.rs
index 8df85d3c85..c7de27ea81 100644
--- a/services/svc/datalakeanalytics/src/package_job_2015_11_preview/models.rs
+++ b/services/svc/datalakeanalytics/src/package_job_2015_11_preview/models.rs
@@ -8,7 +8,12 @@ pub struct HiveJobProperties {
     #[serde(flatten)]
     pub job_properties: JobProperties,
     #[doc = "Gets or sets the statement information for each statement in the script"]
-    #[serde(rename = "statementInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "statementInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statement_info: Vec<HiveJobStatementInfo>,
     #[doc = "Gets or sets the Hive logs location"]
     #[serde(rename = "logsLocation", default, skip_serializing_if = "Option::is_none")]
@@ -65,7 +70,11 @@ pub struct JobDataPath {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub command: Option<String>,
     #[doc = "Gets the list of paths to all of the job data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<String>,
 }
 impl JobDataPath {
@@ -137,7 +146,11 @@ pub mod job_error_details {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobInfoListResult {
     #[doc = "Gets the list of jobInfo items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobInformation>,
     #[doc = "Gets the link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -172,7 +185,12 @@ pub struct JobInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub submitter: Option<String>,
     #[doc = "Gets the error message details for the job, if the job failed."]
-    #[serde(rename = "errorMessage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorMessage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_message: Vec<JobErrorDetails>,
     #[doc = "Gets or sets the degree of parallelism used for this job. This must be greater than 0."]
     #[serde(rename = "degreeOfParallelism", default, skip_serializing_if = "Option::is_none")]
@@ -199,7 +217,12 @@ pub struct JobInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub result: Option<job_information::Result>,
     #[doc = "Gets the job state audit records, indicating when various operations have been performed on this job."]
-    #[serde(rename = "stateAuditRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "stateAuditRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub state_audit_records: Vec<JobStateAuditRecord>,
     #[doc = "the name of hierarchy queue node this job is assigned to, null if job has not been assigned yet or the account doesn't have hierarchy queue."]
     #[serde(rename = "hierarchyQueueNode", default, skip_serializing_if = "Option::is_none")]
@@ -387,7 +410,11 @@ pub struct JobStatistics {
     #[serde(rename = "lastUpdateTimeUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_update_time_utc: Option<time::OffsetDateTime>,
     #[doc = "Gets the list of stages for the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub stages: Vec<JobStatisticsVertexStage>,
 }
 impl JobStatistics {
@@ -469,7 +496,11 @@ pub struct USqlJobProperties {
     #[serde(flatten)]
     pub job_properties: JobProperties,
     #[doc = "Gets or sets the list of resources that are required by the job"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<JobResource>,
     #[doc = "The Data Lake Analytics U-SQL job execution statistics."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/datalakeanalytics/src/package_job_2016_03_preview/models.rs b/services/svc/datalakeanalytics/src/package_job_2016_03_preview/models.rs
index d72c4e8910..f2a84724f2 100644
--- a/services/svc/datalakeanalytics/src/package_job_2016_03_preview/models.rs
+++ b/services/svc/datalakeanalytics/src/package_job_2016_03_preview/models.rs
@@ -77,7 +77,11 @@ pub struct JobDataPath {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub command: Option<String>,
     #[doc = "the list of paths to all of the job data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<String>,
 }
 impl JobDataPath {
@@ -150,7 +154,11 @@ pub mod job_error_details {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobInfoListResult {
     #[doc = "the list of jobInfo items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobInformation>,
     #[doc = "the link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -185,7 +193,12 @@ pub struct JobInformation {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub submitter: Option<String>,
     #[doc = "the error message details for the job, if the job failed."]
-    #[serde(rename = "errorMessage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorMessage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_message: Vec<JobErrorDetails>,
     #[doc = "the degree of parallelism used for this job. This must be greater than 0."]
     #[serde(rename = "degreeOfParallelism", default, skip_serializing_if = "Option::is_none")]
@@ -215,10 +228,20 @@ pub struct JobInformation {
     #[serde(rename = "logFolder", default, skip_serializing_if = "Option::is_none")]
     pub log_folder: Option<String>,
     #[doc = "the list of log file name patterns to find in the logFolder. '*' is the only matching character allowed. Example format: jobExecution*.log or *mylog*.txt"]
-    #[serde(rename = "logFilePatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logFilePatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_file_patterns: Vec<String>,
     #[doc = "the job state audit records, indicating when various operations have been performed on this job."]
-    #[serde(rename = "stateAuditRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "stateAuditRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub state_audit_records: Vec<JobStateAuditRecord>,
     #[doc = "the name of hierarchy queue node this job is assigned to, null if job has not been assigned yet or the account doesn't have hierarchy queue."]
     #[serde(rename = "hierarchyQueueNode", default, skip_serializing_if = "Option::is_none")]
@@ -416,7 +439,11 @@ pub struct JobStatistics {
     #[serde(rename = "finalizingTimeUtc", default, with = "azure_core::date::rfc3339::option")]
     pub finalizing_time_utc: Option<time::OffsetDateTime>,
     #[doc = "the list of stages for the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub stages: Vec<JobStatisticsVertexStage>,
 }
 impl JobStatistics {
@@ -498,7 +525,11 @@ pub struct USqlJobProperties {
     #[serde(flatten)]
     pub job_properties: JobProperties,
     #[doc = "the list of resources that are required by the job"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<JobResource>,
     #[doc = "The Data Lake Analytics job execution statistics."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -507,7 +538,11 @@ pub struct USqlJobProperties {
     #[serde(rename = "debugData", default, skip_serializing_if = "Option::is_none")]
     pub debug_data: Option<JobDataPath>,
     #[doc = "the diagnostics for the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub diagnostics: Vec<Diagnostics>,
     #[doc = "the algebra file path after the job has completed"]
     #[serde(rename = "algebraFilePath", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/datalakeanalytics/src/package_job_2016_11/models.rs b/services/svc/datalakeanalytics/src/package_job_2016_11/models.rs
index c5eba92b09..749ca36956 100644
--- a/services/svc/datalakeanalytics/src/package_job_2016_11/models.rs
+++ b/services/svc/datalakeanalytics/src/package_job_2016_11/models.rs
@@ -60,7 +60,12 @@ pub struct CreateJobParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub priority: Option<i32>,
     #[doc = "the list of log file name patterns to find in the logFolder. '*' is the only matching character allowed. Example format: jobExecution*.log or *mylog*.txt"]
-    #[serde(rename = "logFilePatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logFilePatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_file_patterns: Vec<String>,
     #[doc = "Job relationship information properties including pipeline information, correlation information, etc."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -206,7 +211,11 @@ pub struct JobDataPath {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub command: Option<String>,
     #[doc = "the list of paths to all of the job data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<String>,
 }
 impl JobDataPath {
@@ -282,7 +291,11 @@ pub mod job_error_details {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobInfoListResult {
     #[doc = "the list of JobInfo items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobInformationBasic>,
     #[doc = "the link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -305,10 +318,20 @@ pub struct JobInformation {
     #[serde(flatten)]
     pub job_information_basic: JobInformationBasic,
     #[doc = "the error message details for the job, if the job failed."]
-    #[serde(rename = "errorMessage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorMessage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_message: Vec<JobErrorDetails>,
     #[doc = "the job state audit records, indicating when various operations have been performed on this job."]
-    #[serde(rename = "stateAuditRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "stateAuditRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub state_audit_records: Vec<JobStateAuditRecord>,
     #[doc = "The common Data Lake Analytics job properties."]
     pub properties: JobProperties,
@@ -365,7 +388,12 @@ pub struct JobInformationBasic {
     #[serde(rename = "logFolder", default, skip_serializing_if = "Option::is_none")]
     pub log_folder: Option<String>,
     #[doc = "the list of log file name patterns to find in the logFolder. '*' is the only matching character allowed. Example format: jobExecution*.log or *mylog*.txt"]
-    #[serde(rename = "logFilePatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logFilePatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_file_patterns: Vec<String>,
     #[doc = "Job relationship information properties including pipeline information, correlation information, etc."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -519,10 +547,18 @@ pub struct JobPipelineInformation {
     #[serde(rename = "lastSubmitTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_submit_time: Option<time::OffsetDateTime>,
     #[doc = "the list of run identifiers representing each run of this pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub runs: Vec<JobPipelineRunInformation>,
     #[doc = "the list of recurrence identifiers representing each recurrence in this pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recurrences: Vec<String>,
 }
 impl JobPipelineInformation {
@@ -534,7 +570,11 @@ impl JobPipelineInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobPipelineInformationListResult {
     #[doc = "the list of job pipeline information items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobPipelineInformation>,
     #[doc = "the link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -627,7 +667,11 @@ impl JobRecurrenceInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobRecurrenceInformationListResult {
     #[doc = "the list of job recurrence information items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobRecurrenceInformation>,
     #[doc = "the link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -740,7 +784,11 @@ pub struct JobStatistics {
     #[serde(rename = "finalizingTimeUtc", default, with = "azure_core::date::rfc3339::option")]
     pub finalizing_time_utc: Option<time::OffsetDateTime>,
     #[doc = "the list of stages for the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub stages: Vec<JobStatisticsVertexStage>,
 }
 impl JobStatistics {
@@ -823,7 +871,11 @@ pub struct USqlJobProperties {
     #[serde(flatten)]
     pub job_properties: JobProperties,
     #[doc = "the list of resources that are required by the job"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<JobResource>,
     #[doc = "The Data Lake Analytics job execution statistics."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -832,7 +884,11 @@ pub struct USqlJobProperties {
     #[serde(rename = "debugData", default, skip_serializing_if = "Option::is_none")]
     pub debug_data: Option<JobDataPath>,
     #[doc = "the diagnostics for the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub diagnostics: Vec<Diagnostics>,
     #[doc = "the algebra file path after the job has completed"]
     #[serde(rename = "algebraFilePath", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/datalakeanalytics/src/package_job_2017_09_preview/models.rs b/services/svc/datalakeanalytics/src/package_job_2017_09_preview/models.rs
index bf9f2f4320..9ac7c865db 100644
--- a/services/svc/datalakeanalytics/src/package_job_2017_09_preview/models.rs
+++ b/services/svc/datalakeanalytics/src/package_job_2017_09_preview/models.rs
@@ -61,7 +61,12 @@ pub struct CreateJobParameters {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub priority: Option<i32>,
     #[doc = "The list of log file name patterns to find in the logFolder. '*' is the only matching character allowed. Example format: jobExecution*.log or *mylog*.txt"]
-    #[serde(rename = "logFilePatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logFilePatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_file_patterns: Vec<String>,
     #[doc = "Job relationship information properties including pipeline information, correlation information, etc."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -124,7 +129,11 @@ pub struct CreateScopeJobProperties {
     #[serde(flatten)]
     pub create_job_properties: CreateJobProperties,
     #[doc = "The list of resources that are required by the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<ScopeJobResource>,
     #[doc = "The list of email addresses, separated by semi-colons, to notify when the job reaches a terminal state."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -245,7 +254,11 @@ pub struct JobDataPath {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub command: Option<String>,
     #[doc = "The list of paths to all of the job data."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<String>,
 }
 impl JobDataPath {
@@ -321,7 +334,11 @@ pub mod job_error_details {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobInfoListResult {
     #[doc = "The list of JobInfo items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobInformationBasic>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -344,10 +361,20 @@ pub struct JobInformation {
     #[serde(flatten)]
     pub job_information_basic: JobInformationBasic,
     #[doc = "The error message details for the job, if the job failed."]
-    #[serde(rename = "errorMessage", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorMessage",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_message: Vec<JobErrorDetails>,
     #[doc = "The job state audit records, indicating when various operations have been performed on this job."]
-    #[serde(rename = "stateAuditRecords", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "stateAuditRecords",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub state_audit_records: Vec<JobStateAuditRecord>,
     #[doc = "The common Data Lake Analytics job properties."]
     pub properties: JobProperties,
@@ -404,7 +431,12 @@ pub struct JobInformationBasic {
     #[serde(rename = "logFolder", default, skip_serializing_if = "Option::is_none")]
     pub log_folder: Option<String>,
     #[doc = "The list of log file name patterns to find in the logFolder. '*' is the only matching character allowed. Example format: jobExecution*.log or *mylog*.txt"]
-    #[serde(rename = "logFilePatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "logFilePatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log_file_patterns: Vec<String>,
     #[doc = "Job relationship information properties including pipeline information, correlation information, etc."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -565,10 +597,18 @@ pub struct JobPipelineInformation {
     #[serde(rename = "lastSubmitTime", default, with = "azure_core::date::rfc3339::option")]
     pub last_submit_time: Option<time::OffsetDateTime>,
     #[doc = "The list of recurrence identifiers representing each run of this pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub runs: Vec<JobPipelineRunInformation>,
     #[doc = "The list of recurrence identifiers representing each run of this pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recurrences: Vec<String>,
 }
 impl JobPipelineInformation {
@@ -580,7 +620,11 @@ impl JobPipelineInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobPipelineInformationListResult {
     #[doc = "The list of job pipeline information items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobPipelineInformation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -673,7 +717,11 @@ impl JobRecurrenceInformation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobRecurrenceInformationListResult {
     #[doc = "The list of job recurrence information items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobRecurrenceInformation>,
     #[doc = "The link (url) to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -786,7 +834,11 @@ pub struct JobStatistics {
     #[serde(rename = "finalizingTimeUtc", default, with = "azure_core::date::rfc3339::option")]
     pub finalizing_time_utc: Option<time::OffsetDateTime>,
     #[doc = "The list of stages for the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub stages: Vec<JobStatisticsVertexStage>,
 }
 impl JobStatistics {
@@ -947,7 +999,11 @@ pub struct ScopeJobProperties {
     #[serde(flatten)]
     pub job_properties: JobProperties,
     #[doc = "The list of resources that are required by the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<ScopeJobResource>,
     #[doc = "The algebra file path after the job has completed."]
     #[serde(rename = "userAlgebraPath", default, skip_serializing_if = "Option::is_none")]
@@ -1011,7 +1067,11 @@ pub struct USqlJobProperties {
     #[serde(flatten)]
     pub job_properties: JobProperties,
     #[doc = "The list of resources that are required by the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<JobResource>,
     #[doc = "The Data Lake Analytics job execution statistics."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1020,7 +1080,11 @@ pub struct USqlJobProperties {
     #[serde(rename = "debugData", default, skip_serializing_if = "Option::is_none")]
     pub debug_data: Option<JobDataPath>,
     #[doc = "The diagnostics for the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub diagnostics: Vec<Diagnostics>,
     #[doc = "The algebra file path after the job has completed."]
     #[serde(rename = "algebraFilePath", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/devcenter/src/package_2022_03_01_preview/models.rs b/services/svc/devcenter/src/package_2022_03_01_preview/models.rs
index a202fe89f9..886aa1e519 100644
--- a/services/svc/devcenter/src/package_2022_03_01_preview/models.rs
+++ b/services/svc/devcenter/src/package_2022_03_01_preview/models.rs
@@ -144,7 +144,11 @@ pub struct CatalogItemAction {
     #[serde(rename = "parametersSchema", default, skip_serializing_if = "Option::is_none")]
     pub parameters_schema: Option<String>,
     #[doc = "Input parameters passed to the action"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<CatalogItemParameter>,
     #[doc = "The type of action."]
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
@@ -206,7 +210,11 @@ pub struct CatalogItemParameter {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub required: Option<bool>,
     #[doc = "An array of allowed values"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed: Vec<serde_json::Value>,
 }
 impl CatalogItemParameter {
@@ -242,10 +250,18 @@ pub struct CatalogItemVersion {
     #[serde(rename = "parametersSchema", default, skip_serializing_if = "Option::is_none")]
     pub parameters_schema: Option<String>,
     #[doc = "Input parameters passed to actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<CatalogItemParameter>,
     #[doc = "Custom actions for the catalog item."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<CatalogItemAction>,
     #[doc = "The default container image to use to execute actions"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -310,7 +326,11 @@ pub struct CloudErrorBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "A list of additional details about the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<CloudErrorBody>,
 }
 impl CloudErrorBody {
diff --git a/services/svc/deviceprovisioningservices/src/package_2021_10_01/models.rs b/services/svc/deviceprovisioningservices/src/package_2021_10_01/models.rs
index dd01a5b374..52d86cfda5 100644
--- a/services/svc/deviceprovisioningservices/src/package_2021_10_01/models.rs
+++ b/services/svc/deviceprovisioningservices/src/package_2021_10_01/models.rs
@@ -99,7 +99,11 @@ impl BulkEnrollmentGroupOperationError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct BulkEnrollmentGroupOperationResult {
     #[doc = "Registration errors"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<BulkEnrollmentGroupOperationError>,
     #[doc = "Indicates if the operation was successful in its entirety."]
     #[serde(rename = "isSuccessful")]
@@ -167,7 +171,11 @@ impl BulkEnrollmentOperationError {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct BulkEnrollmentOperationResult {
     #[doc = "Registration errors"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<BulkEnrollmentOperationError>,
     #[doc = "Indicates if the operation was successful in its entirety."]
     #[serde(rename = "isSuccessful")]
@@ -315,7 +323,12 @@ pub struct EnrollmentGroup {
     #[serde(rename = "allocationPolicy", default, skip_serializing_if = "Option::is_none")]
     pub allocation_policy: Option<enrollment_group::AllocationPolicy>,
     #[doc = "The list of IoT Hub hostnames the device(s) in this resource can be allocated to. Must be a subset of tenant level list of IoT hubs."]
-    #[serde(rename = "iotHubs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "iotHubs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub iot_hubs: Vec<String>,
     #[doc = "This tells DPS which webhook to call when using custom allocation."]
     #[serde(rename = "customAllocationDefinition", default, skip_serializing_if = "Option::is_none")]
@@ -413,7 +426,12 @@ pub struct IndividualEnrollment {
     #[serde(rename = "allocationPolicy", default, skip_serializing_if = "Option::is_none")]
     pub allocation_policy: Option<individual_enrollment::AllocationPolicy>,
     #[doc = "The list of IoT Hub hostnames the device(s) in this resource can be allocated to. Must be a subset of tenant level list of IoT hubs."]
-    #[serde(rename = "iotHubs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "iotHubs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub iot_hubs: Vec<String>,
     #[doc = "This tells DPS which webhook to call when using custom allocation."]
     #[serde(rename = "customAllocationDefinition", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/deviceupdate/src/package_2020_09_01/models.rs b/services/svc/deviceupdate/src/package_2020_09_01/models.rs
index ac0957f6b2..660cd498ba 100644
--- a/services/svc/deviceupdate/src/package_2020_09_01/models.rs
+++ b/services/svc/deviceupdate/src/package_2020_09_01/models.rs
@@ -493,7 +493,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "An array of errors that led to the reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "An object containing more specific information than the current object about the error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -847,7 +851,11 @@ impl Serialize for OperationStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageableListOfDeploymentDeviceStates {
     #[doc = "The collection of pageable items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeploymentDeviceState>,
     #[doc = "The link to the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -868,7 +876,11 @@ impl PageableListOfDeploymentDeviceStates {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageableListOfDeployments {
     #[doc = "The collection of pageable items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Deployment>,
     #[doc = "The link to the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -889,7 +901,11 @@ impl PageableListOfDeployments {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageableListOfDeviceClasses {
     #[doc = "The collection of pageable items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeviceClass>,
     #[doc = "The link to the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -910,7 +926,11 @@ impl PageableListOfDeviceClasses {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageableListOfDeviceTags {
     #[doc = "The collection of pageable items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeviceTag>,
     #[doc = "The link to the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -931,7 +951,11 @@ impl PageableListOfDeviceTags {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageableListOfDevices {
     #[doc = "The collection of pageable items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Device>,
     #[doc = "The link to the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -952,7 +976,11 @@ impl PageableListOfDevices {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageableListOfGroups {
     #[doc = "The collection of pageable items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Group>,
     #[doc = "The link to the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -973,7 +1001,11 @@ impl PageableListOfGroups {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageableListOfOperations {
     #[doc = "The collection of pageable items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Operation>,
     #[doc = "The link to the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -994,7 +1026,11 @@ impl PageableListOfOperations {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageableListOfStrings {
     #[doc = "The collection of pageable items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
     #[doc = "The link to the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1015,7 +1051,11 @@ impl PageableListOfStrings {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageableListOfUpdatableDevices {
     #[doc = "The collection of pageable items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UpdatableDevices>,
     #[doc = "The link to the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1036,7 +1076,11 @@ impl PageableListOfUpdatableDevices {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageableListOfUpdateIds {
     #[doc = "The collection of pageable items."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<UpdateId>,
     #[doc = "The link to the next page of items."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/deviceupdate/src/package_2021_06_01_preview/models.rs b/services/svc/deviceupdate/src/package_2021_06_01_preview/models.rs
index 7b29395359..b603abddbf 100644
--- a/services/svc/deviceupdate/src/package_2021_06_01_preview/models.rs
+++ b/services/svc/deviceupdate/src/package_2021_06_01_preview/models.rs
@@ -571,7 +571,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "An array of errors that led to the reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "An object containing more specific information than the current object about the error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -808,7 +812,11 @@ pub struct ImportUpdateInputItem {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "One or more update file properties like filename and source URL."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<FileImportMetadata>,
 }
 impl ImportUpdateInputItem {
@@ -858,7 +866,12 @@ pub struct InstallResult {
     #[serde(rename = "resultDetails", default, skip_serializing_if = "Option::is_none")]
     pub result_details: Option<String>,
     #[doc = "Array of step results"]
-    #[serde(rename = "stepResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "stepResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub step_results: Vec<StepResult>,
 }
 impl InstallResult {
@@ -931,7 +944,12 @@ pub struct LogCollectionOperationDetailedStatus {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<OperationStatusWithoutUndefinedOption>,
     #[doc = "Status of the devices in the operation"]
-    #[serde(rename = "deviceStatus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deviceStatus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub device_status: Vec<LogCollectionOperationDeviceStatus>,
     #[doc = "Device diagnostics operation description."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1158,7 +1176,11 @@ pub struct Step {
     #[serde(rename = "handlerProperties", default, skip_serializing_if = "Option::is_none")]
     pub handler_properties: Option<serde_json::Value>,
     #[doc = "Collection of file names to be passed to handler during execution. Required if step type is inline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<String>,
     #[doc = "Update identifier."]
     #[serde(rename = "updateId", default, skip_serializing_if = "Option::is_none")]
@@ -1327,7 +1349,12 @@ pub struct Update {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub instructions: Option<Instructions>,
     #[doc = "List of update identities that reference this update."]
-    #[serde(rename = "referencedBy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "referencedBy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub referenced_by: Vec<UpdateId>,
     #[doc = "Update aggregate scan result (calculated from payload file scan results)."]
     #[serde(rename = "scanResult", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/deviceupdate/src/package_2022_07_01_preview/models.rs b/services/svc/deviceupdate/src/package_2022_07_01_preview/models.rs
index 950a78336e..52e49abc36 100644
--- a/services/svc/deviceupdate/src/package_2022_07_01_preview/models.rs
+++ b/services/svc/deviceupdate/src/package_2022_07_01_preview/models.rs
@@ -71,7 +71,12 @@ pub struct Deployment {
     #[serde(rename = "groupId")]
     pub group_id: String,
     #[doc = "The device class subgroups the deployment is compatible with and subgroup deployments have been created for. This is not provided by the caller during CreateOrUpdateDeployment but is automatically determined by Device Update"]
-    #[serde(rename = "deviceClassSubgroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deviceClassSubgroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub device_class_subgroups: Vec<String>,
     #[doc = "Boolean flag indicating whether the deployment was canceled."]
     #[serde(rename = "isCanceled", default, skip_serializing_if = "Option::is_none")]
@@ -904,7 +909,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "An array of errors that led to the reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "An object containing more specific information than the current object about the error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -980,7 +989,11 @@ pub struct Group {
     #[serde(rename = "subgroupsWithOnLatestUpdateCount", default, skip_serializing_if = "Option::is_none")]
     pub subgroups_with_on_latest_update_count: Option<i64>,
     #[doc = "The active deployment Ids for the group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployments: Vec<String>,
 }
 impl Group {
@@ -1205,7 +1218,11 @@ pub struct ImportUpdateInputItem {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "One or more update file properties like filename and source URL."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<FileImportMetadata>,
 }
 impl ImportUpdateInputItem {
@@ -1255,7 +1272,12 @@ pub struct InstallResult {
     #[serde(rename = "resultDetails", default, skip_serializing_if = "Option::is_none")]
     pub result_details: Option<String>,
     #[doc = "Array of step results"]
-    #[serde(rename = "stepResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "stepResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub step_results: Vec<StepResult>,
 }
 impl InstallResult {
@@ -1362,7 +1384,12 @@ pub struct LogCollectionOperationDetailedStatus {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<OperationStatusWithoutUndefinedOption>,
     #[doc = "Status of the devices in the operation"]
-    #[serde(rename = "deviceStatus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deviceStatus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub device_status: Vec<LogCollectionOperationDeviceStatus>,
     #[doc = "Device diagnostics operation description."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1565,7 +1592,11 @@ pub struct Step {
     #[serde(rename = "handlerProperties", default, skip_serializing_if = "Option::is_none")]
     pub handler_properties: Option<serde_json::Value>,
     #[doc = "Collection of file names to be passed to handler during execution. Required if step type is inline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<String>,
     #[doc = "Update identifier."]
     #[serde(rename = "updateId", default, skip_serializing_if = "Option::is_none")]
@@ -1699,7 +1730,12 @@ pub struct Update {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub instructions: Option<Instructions>,
     #[doc = "List of update identities that reference this update."]
-    #[serde(rename = "referencedBy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "referencedBy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub referenced_by: Vec<UpdateId>,
     #[doc = "Update aggregate scan result (calculated from payload file scan results)."]
     #[serde(rename = "scanResult", default, skip_serializing_if = "Option::is_none")]
@@ -1783,7 +1819,12 @@ pub struct UpdateFile {
     #[serde(rename = "fileId")]
     pub file_id: String,
     #[doc = "Optional related files metadata used together DownloadHandler metadata to download payload file."]
-    #[serde(rename = "relatedFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "relatedFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub related_files: Vec<UpdateFileBase>,
     #[doc = "Download handler for utilizing related files to download payload file."]
     #[serde(rename = "downloadHandler", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/deviceupdate/src/package_2022_10_01/models.rs b/services/svc/deviceupdate/src/package_2022_10_01/models.rs
index 99ff94e555..7b73e7588d 100644
--- a/services/svc/deviceupdate/src/package_2022_10_01/models.rs
+++ b/services/svc/deviceupdate/src/package_2022_10_01/models.rs
@@ -71,7 +71,12 @@ pub struct Deployment {
     #[serde(rename = "groupId")]
     pub group_id: String,
     #[doc = "The device class subgroups the deployment is compatible with and subgroup deployments have been created for. This is not provided by the caller during CreateOrUpdateDeployment but is automatically determined by Device Update"]
-    #[serde(rename = "deviceClassSubgroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deviceClassSubgroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub device_class_subgroups: Vec<String>,
     #[doc = "Boolean flag indicating whether the deployment was canceled."]
     #[serde(rename = "isCanceled", default, skip_serializing_if = "Option::is_none")]
@@ -869,7 +874,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "An array of errors that led to the reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "An object containing more specific information than the current object about the error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -945,7 +954,11 @@ pub struct Group {
     #[serde(rename = "subgroupsWithOnLatestUpdateCount", default, skip_serializing_if = "Option::is_none")]
     pub subgroups_with_on_latest_update_count: Option<i64>,
     #[doc = "The active deployment Ids for the group"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployments: Vec<String>,
 }
 impl Group {
@@ -1170,7 +1183,11 @@ pub struct ImportUpdateInputItem {
     #[serde(rename = "friendlyName", default, skip_serializing_if = "Option::is_none")]
     pub friendly_name: Option<String>,
     #[doc = "One or more update file properties like filename and source URL."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<FileImportMetadata>,
 }
 impl ImportUpdateInputItem {
@@ -1220,7 +1237,12 @@ pub struct InstallResult {
     #[serde(rename = "resultDetails", default, skip_serializing_if = "Option::is_none")]
     pub result_details: Option<String>,
     #[doc = "Array of step results"]
-    #[serde(rename = "stepResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "stepResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub step_results: Vec<StepResult>,
 }
 impl InstallResult {
@@ -1327,7 +1349,12 @@ pub struct LogCollectionOperationDetailedStatus {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<OperationStatusWithoutUndefinedOption>,
     #[doc = "Status of the devices in the operation"]
-    #[serde(rename = "deviceStatus", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deviceStatus",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub device_status: Vec<LogCollectionOperationDeviceStatus>,
     #[doc = "Device diagnostics operation description."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1530,7 +1557,11 @@ pub struct Step {
     #[serde(rename = "handlerProperties", default, skip_serializing_if = "Option::is_none")]
     pub handler_properties: Option<serde_json::Value>,
     #[doc = "Collection of file names to be passed to handler during execution. Required if step type is inline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<String>,
     #[doc = "Update identifier."]
     #[serde(rename = "updateId", default, skip_serializing_if = "Option::is_none")]
@@ -1664,7 +1695,12 @@ pub struct Update {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub instructions: Option<Instructions>,
     #[doc = "List of update identities that reference this update."]
-    #[serde(rename = "referencedBy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "referencedBy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub referenced_by: Vec<UpdateId>,
     #[doc = "Update aggregate scan result (calculated from payload file scan results)."]
     #[serde(rename = "scanResult", default, skip_serializing_if = "Option::is_none")]
@@ -1748,7 +1784,12 @@ pub struct UpdateFile {
     #[serde(rename = "fileId")]
     pub file_id: String,
     #[doc = "Optional related files metadata used together DownloadHandler metadata to download payload file."]
-    #[serde(rename = "relatedFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "relatedFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub related_files: Vec<UpdateFileBase>,
     #[doc = "Download handler for utilizing related files to download payload file."]
     #[serde(rename = "downloadHandler", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/digitaltwins/src/package_2020_05_31_preview/models.rs b/services/svc/digitaltwins/src/package_2020_05_31_preview/models.rs
index d60ad43561..0f5c7f0b3d 100644
--- a/services/svc/digitaltwins/src/package_2020_05_31_preview/models.rs
+++ b/services/svc/digitaltwins/src/package_2020_05_31_preview/models.rs
@@ -13,7 +13,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "A more specific error description than was provided by the containing error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -68,7 +72,11 @@ impl EventRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventRouteCollection {
     #[doc = "The EventRoute objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventRoute>,
     #[doc = "A URI to retrieve the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -109,7 +117,11 @@ impl IncomingRelationship {
 #[doc = "A collection of incoming relationships which relate digital twins together."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IncomingRelationshipCollection {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IncomingRelationship>,
     #[doc = "A URI to retrieve the next page of objects."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -179,7 +191,11 @@ pub type NonPagedModelDataCollection = Vec<ModelData>;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedModelDataCollection {
     #[doc = "The ModelData objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ModelData>,
     #[doc = "A URI to retrieve the next page of objects."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -200,7 +216,11 @@ impl PagedModelDataCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryResult {
     #[doc = "The query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<serde_json::Value>,
     #[doc = "A token which can be used to construct a new QuerySpecification to retrieve the next set of results."]
     #[serde(rename = "continuationToken", default, skip_serializing_if = "Option::is_none")]
@@ -230,7 +250,11 @@ impl QuerySpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RelationshipCollection {
     #[doc = "The relationship objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<serde_json::Value>,
     #[doc = "A URI to retrieve the next page of objects."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/digitaltwins/src/package_2020_10_31/models.rs b/services/svc/digitaltwins/src/package_2020_10_31/models.rs
index 09fb4e0e46..05f0247ee9 100644
--- a/services/svc/digitaltwins/src/package_2020_10_31/models.rs
+++ b/services/svc/digitaltwins/src/package_2020_10_31/models.rs
@@ -46,7 +46,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "A more specific error description than was provided by the containing error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -100,7 +104,11 @@ impl EventRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventRouteCollection {
     #[doc = "The EventRoute objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventRoute>,
     #[doc = "A URI to retrieve the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -141,7 +149,11 @@ impl IncomingRelationship {
 #[doc = "A collection of incoming relationships which relate digital twins together."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IncomingRelationshipCollection {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IncomingRelationship>,
     #[doc = "A URI to retrieve the next page of objects."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -178,7 +190,11 @@ pub type NonPagedDigitalTwinsModelDataCollection = Vec<DigitalTwinsModelData>;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedDigitalTwinsModelDataCollection {
     #[doc = "The DigitalTwinsModelData objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DigitalTwinsModelData>,
     #[doc = "A URI to retrieve the next page of objects."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -199,7 +215,11 @@ impl PagedDigitalTwinsModelDataCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryResult {
     #[doc = "The query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<serde_json::Value>,
     #[doc = "A token which can be used to construct a new QuerySpecification to retrieve the next set of results."]
     #[serde(rename = "continuationToken", default, skip_serializing_if = "Option::is_none")]
@@ -229,7 +249,11 @@ impl QuerySpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RelationshipCollection {
     #[doc = "The relationship objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<serde_json::Value>,
     #[doc = "A URI to retrieve the next page of objects."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/digitaltwins/src/package_2021_06_30_preview/models.rs b/services/svc/digitaltwins/src/package_2021_06_30_preview/models.rs
index 264aa0eaea..df001e608a 100644
--- a/services/svc/digitaltwins/src/package_2021_06_30_preview/models.rs
+++ b/services/svc/digitaltwins/src/package_2021_06_30_preview/models.rs
@@ -46,7 +46,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "A more specific error description than was provided by the containing error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -100,7 +104,11 @@ impl EventRoute {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventRouteCollection {
     #[doc = "The EventRoute objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<EventRoute>,
     #[doc = "A URI to retrieve the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -141,7 +149,11 @@ impl IncomingRelationship {
 #[doc = "A collection of incoming relationships which relate digital twins together."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct IncomingRelationshipCollection {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<IncomingRelationship>,
     #[doc = "A URI to retrieve the next page of objects."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -178,7 +190,11 @@ pub type NonPagedDigitalTwinsModelDataCollection = Vec<DigitalTwinsModelData>;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PagedDigitalTwinsModelDataCollection {
     #[doc = "The DigitalTwinsModelData objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DigitalTwinsModelData>,
     #[doc = "A URI to retrieve the next page of objects."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -199,7 +215,11 @@ impl PagedDigitalTwinsModelDataCollection {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QueryResult {
     #[doc = "The query results."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<serde_json::Value>,
     #[doc = "A token which can be used to construct a new QuerySpecification to retrieve the next set of results."]
     #[serde(rename = "continuationToken", default, skip_serializing_if = "Option::is_none")]
@@ -229,7 +249,11 @@ impl QuerySpecification {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RelationshipCollection {
     #[doc = "The relationship objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<serde_json::Value>,
     #[doc = "A URI to retrieve the next page of objects."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/digitaltwins/src/package_2022_05_31/models.rs b/services/svc/digitaltwins/src/package_2022_05_31/models.rs
index bbcb6607ba..3f7d644ea4 100644
--- a/services/svc/digitaltwins/src/package_2022_05_31/models.rs
+++ b/services/svc/digitaltwins/src/package_2022_05_31/models.rs
@@ -46,7 +46,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub message: Option<String>,
     #[doc = "Internal error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "A more specific error description than was provided by the containing error."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/eventgrid/src/package_2018_01/models.rs b/services/svc/eventgrid/src/package_2018_01/models.rs
index 1a6a9c2a09..0011937ce7 100644
--- a/services/svc/eventgrid/src/package_2018_01/models.rs
+++ b/services/svc/eventgrid/src/package_2018_01/models.rs
@@ -294,7 +294,11 @@ pub struct AcsChatThreadCreatedEventData {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<serde_json::Value>,
     #[doc = "The list of properties of participants who are part of the thread"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub participants: Vec<AcsChatThreadParticipantProperties>,
 }
 impl AcsChatThreadCreatedEventData {
@@ -314,7 +318,11 @@ pub struct AcsChatThreadCreatedWithUserEventData {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<serde_json::Value>,
     #[doc = "The list of properties of participants who are part of the thread"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub participants: Vec<AcsChatThreadParticipantProperties>,
 }
 impl AcsChatThreadCreatedWithUserEventData {
@@ -622,7 +630,12 @@ pub mod acs_recording_file_status_updated_event_data {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AcsRecordingStorageInfoProperties {
     #[doc = "List of details of recording chunks information"]
-    #[serde(rename = "recordingChunks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "recordingChunks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub recording_chunks: Vec<AcsRecordingChunkInfoProperties>,
 }
 impl AcsRecordingStorageInfoProperties {
@@ -660,7 +673,12 @@ pub struct AcsSmsDeliveryReportReceivedEventData {
     #[serde(rename = "deliveryStatusDetails", default, skip_serializing_if = "Option::is_none")]
     pub delivery_status_details: Option<String>,
     #[doc = "List of details of delivery attempts made"]
-    #[serde(rename = "deliveryAttempts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "deliveryAttempts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delivery_attempts: Vec<AcsSmsDeliveryAttemptProperties>,
     #[doc = "The time at which the SMS delivery report was received"]
     #[serde(rename = "receivedTimestamp", default, with = "azure_core::date::rfc3339::option")]
@@ -2737,13 +2755,27 @@ impl MapsGeofenceEnteredEventData {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MapsGeofenceEventProperties {
     #[doc = "Lists of the geometry ID of the geofence which is expired relative to the user time in the request."]
-    #[serde(rename = "expiredGeofenceGeometryId", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "expiredGeofenceGeometryId",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub expired_geofence_geometry_id: Vec<String>,
     #[doc = "Lists the fence geometries that either fully contain the coordinate position or have an overlap with the searchBuffer around the fence."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub geometries: Vec<MapsGeofenceGeometry>,
     #[doc = "Lists of the geometry ID of the geofence which is in invalid period relative to the user time in the request."]
-    #[serde(rename = "invalidPeriodGeofenceGeometryId", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "invalidPeriodGeofenceGeometryId",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub invalid_period_geofence_geometry_id: Vec<String>,
     #[doc = "True if at least one event is published to the Azure Maps event subscriber, false if no event is published to the Azure Maps event subscriber."]
     #[serde(rename = "isEventPublished", default, skip_serializing_if = "Option::is_none")]
@@ -2809,7 +2841,11 @@ pub struct MediaJobCanceledEventData {
     #[serde(flatten)]
     pub media_job_state_change_event_data: MediaJobStateChangeEventData,
     #[doc = "Gets the Job outputs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<MediaJobOutput>,
 }
 impl MediaJobCanceledEventData {
@@ -2844,7 +2880,11 @@ pub struct MediaJobError {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub retry: Option<media_job_error::Retry>,
     #[doc = "An array of details about specific errors that led to this reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<MediaJobErrorDetail>,
 }
 impl MediaJobError {
@@ -2906,7 +2946,11 @@ pub struct MediaJobErroredEventData {
     #[serde(flatten)]
     pub media_job_state_change_event_data: MediaJobStateChangeEventData,
     #[doc = "Gets the Job outputs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<MediaJobOutput>,
 }
 impl MediaJobErroredEventData {
@@ -2920,7 +2964,11 @@ pub struct MediaJobFinishedEventData {
     #[serde(flatten)]
     pub media_job_state_change_event_data: MediaJobStateChangeEventData,
     #[doc = "Gets the Job outputs."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub outputs: Vec<MediaJobOutput>,
 }
 impl MediaJobFinishedEventData {
diff --git a/services/svc/filestorage/src/package_2020_10/models.rs b/services/svc/filestorage/src/package_2020_10/models.rs
index 83599851ca..c064165546 100644
--- a/services/svc/filestorage/src/package_2020_10/models.rs
+++ b/services/svc/filestorage/src/package_2020_10/models.rs
@@ -612,9 +612,19 @@ pub type ShareEnabledProtocols = String;
 #[doc = "The list of file ranges"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ShareFileRangeList {
-    #[serde(rename = "Ranges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Ranges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ranges: Vec<FileRange>,
-    #[serde(rename = "ClearRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ClearRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_ranges: Vec<ClearRange>,
 }
 impl ShareFileRangeList {
diff --git a/services/svc/filestorage/src/package_2021_02/models.rs b/services/svc/filestorage/src/package_2021_02/models.rs
index 5ba2c864f8..4ef0de9d38 100644
--- a/services/svc/filestorage/src/package_2021_02/models.rs
+++ b/services/svc/filestorage/src/package_2021_02/models.rs
@@ -612,9 +612,19 @@ pub type ShareEnabledProtocols = String;
 #[doc = "The list of file ranges"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ShareFileRangeList {
-    #[serde(rename = "Ranges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Ranges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ranges: Vec<FileRange>,
-    #[serde(rename = "ClearRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ClearRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_ranges: Vec<ClearRange>,
 }
 impl ShareFileRangeList {
diff --git a/services/svc/filestorage/src/package_2021_04/models.rs b/services/svc/filestorage/src/package_2021_04/models.rs
index 5ba2c864f8..4ef0de9d38 100644
--- a/services/svc/filestorage/src/package_2021_04/models.rs
+++ b/services/svc/filestorage/src/package_2021_04/models.rs
@@ -612,9 +612,19 @@ pub type ShareEnabledProtocols = String;
 #[doc = "The list of file ranges"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ShareFileRangeList {
-    #[serde(rename = "Ranges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Ranges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ranges: Vec<FileRange>,
-    #[serde(rename = "ClearRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ClearRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_ranges: Vec<ClearRange>,
 }
 impl ShareFileRangeList {
diff --git a/services/svc/filestorage/src/package_2021_06/models.rs b/services/svc/filestorage/src/package_2021_06/models.rs
index 5ba2c864f8..4ef0de9d38 100644
--- a/services/svc/filestorage/src/package_2021_06/models.rs
+++ b/services/svc/filestorage/src/package_2021_06/models.rs
@@ -612,9 +612,19 @@ pub type ShareEnabledProtocols = String;
 #[doc = "The list of file ranges"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ShareFileRangeList {
-    #[serde(rename = "Ranges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Ranges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ranges: Vec<FileRange>,
-    #[serde(rename = "ClearRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ClearRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub clear_ranges: Vec<ClearRange>,
 }
 impl ShareFileRangeList {
diff --git a/services/svc/graphrbac/src/v1_6/models.rs b/services/svc/graphrbac/src/v1_6/models.rs
index b83898d314..1c51b63b2c 100644
--- a/services/svc/graphrbac/src/v1_6/models.rs
+++ b/services/svc/graphrbac/src/v1_6/models.rs
@@ -53,7 +53,12 @@ pub struct AppRole {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Specifies whether this app role definition can be assigned to users and groups by setting to 'User', or to other applications (that are accessing this application in daemon service scenarios) by setting to 'Application', or to both. "]
-    #[serde(rename = "allowedMemberTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "allowedMemberTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub allowed_member_types: Vec<String>,
     #[doc = "Permission help text that appears in the admin app assignment and consent experiences."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -114,7 +119,11 @@ impl AppRoleAssignment {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AppRoleAssignmentListResult {
     #[doc = "A collection of AppRoleAssignment."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AppRoleAssignment>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -149,10 +158,20 @@ pub struct Application {
     #[serde(rename = "appLogoUrl", default, skip_serializing_if = "Option::is_none")]
     pub app_logo_url: Option<String>,
     #[doc = "The collection of application roles that an application may declare. These roles can be assigned to users, groups or service principals."]
-    #[serde(rename = "appRoles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appRoles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_roles: Vec<AppRole>,
     #[doc = "The application permissions."]
-    #[serde(rename = "appPermissions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appPermissions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_permissions: Vec<String>,
     #[doc = "Whether the application is available to other tenants."]
     #[serde(rename = "availableToOtherTenants", default, skip_serializing_if = "Option::is_none")]
@@ -170,7 +189,12 @@ pub struct Application {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub homepage: Option<String>,
     #[doc = "A collection of URIs for the application."]
-    #[serde(rename = "identifierUris", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "identifierUris",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identifier_uris: Vec<String>,
     #[doc = "Represents a group of URIs that provide terms of service, marketing, support and privacy policy information about an application. The default value for each string is null."]
     #[serde(rename = "informationalUrls", default, skip_serializing_if = "Option::is_none")]
@@ -179,10 +203,20 @@ pub struct Application {
     #[serde(rename = "isDeviceOnlyAuthSupported", default, skip_serializing_if = "Option::is_none")]
     pub is_device_only_auth_supported: Option<bool>,
     #[doc = "A collection of KeyCredential objects."]
-    #[serde(rename = "keyCredentials", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyCredentials",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_credentials: Vec<KeyCredential>,
     #[doc = "Client applications that are tied to this resource application. Consent to any of the known client applications will result in implicit consent to the resource application through a combined consent dialog (showing the OAuth permission scopes required by the client and the resource)."]
-    #[serde(rename = "knownClientApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "knownClientApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub known_client_applications: Vec<String>,
     #[doc = "the url of the logout page"]
     #[serde(rename = "logoutUrl", default, skip_serializing_if = "Option::is_none")]
@@ -194,22 +228,42 @@ pub struct Application {
     #[serde(rename = "oauth2AllowUrlPathMatching", default, skip_serializing_if = "Option::is_none")]
     pub oauth2_allow_url_path_matching: Option<bool>,
     #[doc = "The collection of OAuth 2.0 permission scopes that the web API (resource) application exposes to client applications. These permission scopes may be granted to client applications during consent."]
-    #[serde(rename = "oauth2Permissions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "oauth2Permissions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub oauth2_permissions: Vec<OAuth2Permission>,
     #[doc = "Specifies whether, as part of OAuth 2.0 token requests, Azure AD will allow POST requests, as opposed to GET requests. The default is false, which specifies that only GET requests will be allowed."]
     #[serde(rename = "oauth2RequirePostResponse", default, skip_serializing_if = "Option::is_none")]
     pub oauth2_require_post_response: Option<bool>,
     #[doc = "A list of tenants allowed to access application."]
-    #[serde(rename = "orgRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orgRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub org_restrictions: Vec<String>,
     #[doc = "Specifying the claims to be included in the token."]
     #[serde(rename = "optionalClaims", default, skip_serializing_if = "Option::is_none")]
     pub optional_claims: Option<OptionalClaims>,
     #[doc = "A collection of PasswordCredential objects"]
-    #[serde(rename = "passwordCredentials", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "passwordCredentials",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub password_credentials: Vec<PasswordCredential>,
     #[doc = "list of pre-authorized applications."]
-    #[serde(rename = "preAuthorizedApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preAuthorizedApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pre_authorized_applications: Vec<PreAuthorizedApplication>,
     #[doc = "Specifies whether this application is a public client (such as an installed application running on a mobile device). Default is false."]
     #[serde(rename = "publicClient", default, skip_serializing_if = "Option::is_none")]
@@ -218,10 +272,20 @@ pub struct Application {
     #[serde(rename = "publisherDomain", default, skip_serializing_if = "Option::is_none")]
     pub publisher_domain: Option<String>,
     #[doc = "A collection of reply URLs for the application."]
-    #[serde(rename = "replyUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replyUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reply_urls: Vec<String>,
     #[doc = "Specifies resources that this application requires access to and the set of OAuth permission scopes and application roles that it needs under each of those resources. This pre-configuration of required resource access drives the consent experience."]
-    #[serde(rename = "requiredResourceAccess", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredResourceAccess",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_resource_access: Vec<RequiredResourceAccess>,
     #[doc = "The URL to the SAML metadata for the application."]
     #[serde(rename = "samlMetadataUrl", default, skip_serializing_if = "Option::is_none")]
@@ -285,10 +349,20 @@ pub struct ApplicationBase {
     #[serde(rename = "appLogoUrl", default, skip_serializing_if = "Option::is_none")]
     pub app_logo_url: Option<String>,
     #[doc = "The collection of application roles that an application may declare. These roles can be assigned to users, groups or service principals."]
-    #[serde(rename = "appRoles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appRoles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_roles: Vec<AppRole>,
     #[doc = "The application permissions."]
-    #[serde(rename = "appPermissions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appPermissions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_permissions: Vec<String>,
     #[doc = "Whether the application is available to other tenants."]
     #[serde(rename = "availableToOtherTenants", default, skip_serializing_if = "Option::is_none")]
@@ -309,10 +383,20 @@ pub struct ApplicationBase {
     #[serde(rename = "isDeviceOnlyAuthSupported", default, skip_serializing_if = "Option::is_none")]
     pub is_device_only_auth_supported: Option<bool>,
     #[doc = "A collection of KeyCredential objects."]
-    #[serde(rename = "keyCredentials", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyCredentials",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_credentials: Vec<KeyCredential>,
     #[doc = "Client applications that are tied to this resource application. Consent to any of the known client applications will result in implicit consent to the resource application through a combined consent dialog (showing the OAuth permission scopes required by the client and the resource)."]
-    #[serde(rename = "knownClientApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "knownClientApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub known_client_applications: Vec<String>,
     #[doc = "the url of the logout page"]
     #[serde(rename = "logoutUrl", default, skip_serializing_if = "Option::is_none")]
@@ -324,22 +408,42 @@ pub struct ApplicationBase {
     #[serde(rename = "oauth2AllowUrlPathMatching", default, skip_serializing_if = "Option::is_none")]
     pub oauth2_allow_url_path_matching: Option<bool>,
     #[doc = "The collection of OAuth 2.0 permission scopes that the web API (resource) application exposes to client applications. These permission scopes may be granted to client applications during consent."]
-    #[serde(rename = "oauth2Permissions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "oauth2Permissions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub oauth2_permissions: Vec<OAuth2Permission>,
     #[doc = "Specifies whether, as part of OAuth 2.0 token requests, Azure AD will allow POST requests, as opposed to GET requests. The default is false, which specifies that only GET requests will be allowed."]
     #[serde(rename = "oauth2RequirePostResponse", default, skip_serializing_if = "Option::is_none")]
     pub oauth2_require_post_response: Option<bool>,
     #[doc = "A list of tenants allowed to access application."]
-    #[serde(rename = "orgRestrictions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "orgRestrictions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub org_restrictions: Vec<String>,
     #[doc = "Specifying the claims to be included in the token."]
     #[serde(rename = "optionalClaims", default, skip_serializing_if = "Option::is_none")]
     pub optional_claims: Option<OptionalClaims>,
     #[doc = "A collection of PasswordCredential objects"]
-    #[serde(rename = "passwordCredentials", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "passwordCredentials",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub password_credentials: Vec<PasswordCredential>,
     #[doc = "list of pre-authorized applications."]
-    #[serde(rename = "preAuthorizedApplications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preAuthorizedApplications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pre_authorized_applications: Vec<PreAuthorizedApplication>,
     #[doc = "Specifies whether this application is a public client (such as an installed application running on a mobile device). Default is false."]
     #[serde(rename = "publicClient", default, skip_serializing_if = "Option::is_none")]
@@ -348,10 +452,20 @@ pub struct ApplicationBase {
     #[serde(rename = "publisherDomain", default, skip_serializing_if = "Option::is_none")]
     pub publisher_domain: Option<String>,
     #[doc = "A collection of reply URLs for the application."]
-    #[serde(rename = "replyUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replyUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reply_urls: Vec<String>,
     #[doc = "Specifies resources that this application requires access to and the set of OAuth permission scopes and application roles that it needs under each of those resources. This pre-configuration of required resource access drives the consent experience."]
-    #[serde(rename = "requiredResourceAccess", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requiredResourceAccess",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub required_resource_access: Vec<RequiredResourceAccess>,
     #[doc = "The URL to the SAML metadata for the application."]
     #[serde(rename = "samlMetadataUrl", default, skip_serializing_if = "Option::is_none")]
@@ -377,7 +491,12 @@ pub struct ApplicationCreateParameters {
     #[serde(rename = "displayName")]
     pub display_name: String,
     #[doc = "A collection of URIs for the application."]
-    #[serde(rename = "identifierUris", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "identifierUris",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identifier_uris: Vec<String>,
 }
 impl ApplicationCreateParameters {
@@ -393,7 +512,11 @@ impl ApplicationCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ApplicationListResult {
     #[doc = "A collection of applications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Application>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -419,7 +542,12 @@ pub struct ApplicationUpdateParameters {
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
     pub display_name: Option<String>,
     #[doc = "A collection of URIs for the application."]
-    #[serde(rename = "identifierUris", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "identifierUris",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identifier_uris: Vec<String>,
 }
 impl ApplicationUpdateParameters {
@@ -480,7 +608,11 @@ impl DirectoryObject {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DirectoryObjectListResult {
     #[doc = "A collection of DirectoryObject."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DirectoryObject>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -526,7 +658,11 @@ impl Domain {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DomainListResult {
     #[doc = "the list of domains."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Domain>,
 }
 impl azure_core::Continuable for DomainListResult {
@@ -556,10 +692,19 @@ impl ErrorMessage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GetObjectsParameters {
     #[doc = "The requested object IDs."]
-    #[serde(rename = "objectIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "objectIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub object_ids: Vec<String>,
     #[doc = "The requested object types."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub types: Vec<String>,
     #[doc = "If true, also searches for object IDs in the partner tenant."]
     #[serde(rename = "includeDirectoryObjectReferences", default, skip_serializing_if = "Option::is_none")]
@@ -655,7 +800,11 @@ impl GroupGetMemberGroupsParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GroupGetMemberGroupsResult {
     #[doc = "A collection of group IDs of which the group is a member."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl azure_core::Continuable for GroupGetMemberGroupsResult {
@@ -673,7 +822,11 @@ impl GroupGetMemberGroupsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct GroupListResult {
     #[doc = "A collection of Active Directory groups."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AdGroup>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -784,7 +937,11 @@ impl KeyCredential {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyCredentialListResult {
     #[doc = "A collection of KeyCredentials."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KeyCredential>,
 }
 impl azure_core::Continuable for KeyCredentialListResult {
@@ -921,7 +1078,11 @@ pub mod o_auth2_permission_grant {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OAuth2PermissionGrantListResult {
     #[doc = "the list of oauth2 permissions grants"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<OAuth2PermissionGrant>,
     #[doc = "the URL to get the next set of results."]
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -977,13 +1138,28 @@ impl OptionalClaim {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct OptionalClaims {
     #[doc = "Optional claims requested to be included in the id token."]
-    #[serde(rename = "idToken", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "idToken",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub id_token: Vec<OptionalClaim>,
     #[doc = "Optional claims requested to be included in the access token."]
-    #[serde(rename = "accessToken", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessToken",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_token: Vec<OptionalClaim>,
     #[doc = "Optional claims requested to be included in the saml token."]
-    #[serde(rename = "samlToken", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "samlToken",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub saml_token: Vec<OptionalClaim>,
 }
 impl OptionalClaims {
@@ -1019,7 +1195,11 @@ impl PasswordCredential {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PasswordCredentialListResult {
     #[doc = "A collection of PasswordCredentials."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PasswordCredential>,
 }
 impl azure_core::Continuable for PasswordCredentialListResult {
@@ -1068,10 +1248,18 @@ pub struct PreAuthorizedApplication {
     #[serde(rename = "appId", default, skip_serializing_if = "Option::is_none")]
     pub app_id: Option<String>,
     #[doc = "Collection of required app permissions/entitlements from the resource application."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<PreAuthorizedApplicationPermission>,
     #[doc = "Collection of extensions from the resource application."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub extensions: Vec<PreAuthorizedApplicationExtension>,
 }
 impl PreAuthorizedApplication {
@@ -1083,7 +1271,11 @@ impl PreAuthorizedApplication {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PreAuthorizedApplicationExtension {
     #[doc = "The extension's conditions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conditions: Vec<String>,
 }
 impl PreAuthorizedApplicationExtension {
@@ -1098,7 +1290,12 @@ pub struct PreAuthorizedApplicationPermission {
     #[serde(rename = "directAccessGrant", default, skip_serializing_if = "Option::is_none")]
     pub direct_access_grant: Option<bool>,
     #[doc = "The list of permissions."]
-    #[serde(rename = "accessGrants", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "accessGrants",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub access_grants: Vec<String>,
 }
 impl PreAuthorizedApplicationPermission {
@@ -1147,7 +1344,12 @@ pub struct ServicePrincipal {
     #[serde(rename = "accountEnabled", default, skip_serializing_if = "Option::is_none")]
     pub account_enabled: Option<bool>,
     #[doc = "alternative names"]
-    #[serde(rename = "alternativeNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "alternativeNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub alternative_names: Vec<String>,
     #[doc = "The display name exposed by the associated application."]
     #[serde(rename = "appDisplayName", default, skip_serializing_if = "Option::is_none")]
@@ -1161,7 +1363,12 @@ pub struct ServicePrincipal {
     #[serde(rename = "appRoleAssignmentRequired", default, skip_serializing_if = "Option::is_none")]
     pub app_role_assignment_required: Option<bool>,
     #[doc = "The collection of application roles that an application may declare. These roles can be assigned to users, groups or service principals."]
-    #[serde(rename = "appRoles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "appRoles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub app_roles: Vec<AppRole>,
     #[doc = "The display name of the service principal."]
     #[serde(rename = "displayName", default, skip_serializing_if = "Option::is_none")]
@@ -1173,16 +1380,31 @@ pub struct ServicePrincipal {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub homepage: Option<String>,
     #[doc = "The collection of key credentials associated with the service principal."]
-    #[serde(rename = "keyCredentials", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyCredentials",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_credentials: Vec<KeyCredential>,
     #[doc = "A URL provided by the author of the associated application to logout"]
     #[serde(rename = "logoutUrl", default, skip_serializing_if = "Option::is_none")]
     pub logout_url: Option<String>,
     #[doc = "The OAuth 2.0 permissions exposed by the associated application."]
-    #[serde(rename = "oauth2Permissions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "oauth2Permissions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub oauth2_permissions: Vec<OAuth2Permission>,
     #[doc = "The collection of password credentials associated with the service principal."]
-    #[serde(rename = "passwordCredentials", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "passwordCredentials",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub password_credentials: Vec<PasswordCredential>,
     #[doc = "The thumbprint of preferred certificate to sign the token"]
     #[serde(rename = "preferredTokenSigningKeyThumbprint", default, skip_serializing_if = "Option::is_none")]
@@ -1191,19 +1413,33 @@ pub struct ServicePrincipal {
     #[serde(rename = "publisherName", default, skip_serializing_if = "Option::is_none")]
     pub publisher_name: Option<String>,
     #[doc = "The URLs that user tokens are sent to for sign in with the associated application.  The redirect URIs that the oAuth 2.0 authorization code and access tokens are sent to for the associated application."]
-    #[serde(rename = "replyUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replyUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reply_urls: Vec<String>,
     #[doc = "The URL to the SAML metadata of the associated application"]
     #[serde(rename = "samlMetadataUrl", default, skip_serializing_if = "Option::is_none")]
     pub saml_metadata_url: Option<String>,
     #[doc = "A collection of service principal names."]
-    #[serde(rename = "servicePrincipalNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "servicePrincipalNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_principal_names: Vec<String>,
     #[doc = "the type of the service principal"]
     #[serde(rename = "servicePrincipalType", default, skip_serializing_if = "Option::is_none")]
     pub service_principal_type: Option<String>,
     #[doc = "Optional list of tags that you can apply to your service principals. Not nullable."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
 }
 impl ServicePrincipal {
@@ -1244,16 +1480,30 @@ pub struct ServicePrincipalBase {
     #[serde(rename = "appRoleAssignmentRequired", default, skip_serializing_if = "Option::is_none")]
     pub app_role_assignment_required: Option<bool>,
     #[doc = "The collection of key credentials associated with the service principal."]
-    #[serde(rename = "keyCredentials", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "keyCredentials",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_credentials: Vec<KeyCredential>,
     #[doc = "The collection of password credentials associated with the service principal."]
-    #[serde(rename = "passwordCredentials", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "passwordCredentials",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub password_credentials: Vec<PasswordCredential>,
     #[doc = "the type of the service principal"]
     #[serde(rename = "servicePrincipalType", default, skip_serializing_if = "Option::is_none")]
     pub service_principal_type: Option<String>,
     #[doc = "Optional list of tags that you can apply to your service principals. Not nullable."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
 }
 impl ServicePrincipalBase {
@@ -1282,7 +1532,11 @@ impl ServicePrincipalCreateParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServicePrincipalListResult {
     #[doc = "the list of service principals."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ServicePrincipal>,
     #[doc = "the URL to get the next set of results."]
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1376,7 +1630,12 @@ pub struct User {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub mail: Option<String>,
     #[doc = "The sign-in names of the user."]
-    #[serde(rename = "signInNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "signInNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sign_in_names: Vec<SignInName>,
 }
 impl User {
@@ -1559,7 +1818,11 @@ impl UserGetMemberGroupsParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserGetMemberGroupsResult {
     #[doc = "A collection of group IDs of which the user is a member."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl azure_core::Continuable for UserGetMemberGroupsResult {
@@ -1577,7 +1840,11 @@ impl UserGetMemberGroupsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UserListResult {
     #[doc = "the list of users."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<User>,
     #[doc = "The URL to get the next set of results."]
     #[serde(rename = "odata.nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/imds/src/package_2021_01_01/models.rs b/services/svc/imds/src/package_2021_01_01/models.rs
index 5ff00cdf81..9968b6180e 100644
--- a/services/svc/imds/src/package_2021_01_01/models.rs
+++ b/services/svc/imds/src/package_2021_01_01/models.rs
@@ -56,7 +56,12 @@ pub struct Compute {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub plan: Option<PlanProperties>,
     #[doc = "This is information about the SSH certificate"]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<PublicKeysProperties>,
     #[doc = "This is the fault domain in which the VM."]
     #[serde(rename = "platformFaultDomain", default, skip_serializing_if = "Option::is_none")]
@@ -95,7 +100,12 @@ pub struct Compute {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<String>,
     #[doc = "This is the list of tags for your VM formatted as a JSON array for easier programmatic parsing."]
-    #[serde(rename = "tagsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tagsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags_list: Vec<TagsProperties>,
     #[doc = "The set of data specified when the VM was created for use during or after provisioning (Base64 encoded)"]
     #[serde(rename = "userData", default, skip_serializing_if = "Option::is_none")]
@@ -428,7 +438,11 @@ impl ManagedDisk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Network {
     #[doc = "This contains data about the network interface."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub interface: Vec<NetworkInterface>,
 }
 impl Network {
@@ -460,10 +474,19 @@ pub mod network_interface {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Ipv4 {
         #[doc = "This is the IP address"]
-        #[serde(rename = "ipAddress", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddress",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_address: Vec<Ipv4Properties>,
         #[doc = "This is the subnet"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub subnet: Vec<SubnetProperties>,
     }
     impl Ipv4 {
@@ -475,7 +498,12 @@ pub mod network_interface {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Ipv6 {
         #[doc = "This is the IP address"]
-        #[serde(rename = "ipAddress", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddress",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_address: Vec<Ipv6Properties>,
     }
     impl Ipv6 {
@@ -602,7 +630,12 @@ pub struct StorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
     #[doc = "Data disk information"]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
 }
 impl StorageProfile {
diff --git a/services/svc/imds/src/package_2021_02_01/models.rs b/services/svc/imds/src/package_2021_02_01/models.rs
index c1a1894e49..a5d24323e8 100644
--- a/services/svc/imds/src/package_2021_02_01/models.rs
+++ b/services/svc/imds/src/package_2021_02_01/models.rs
@@ -56,7 +56,12 @@ pub struct Compute {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub plan: Option<PlanProperties>,
     #[doc = "This is information about the SSH certificate"]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<PublicKeysProperties>,
     #[doc = "This is the fault domain in which the VM."]
     #[serde(rename = "platformFaultDomain", default, skip_serializing_if = "Option::is_none")]
@@ -95,7 +100,12 @@ pub struct Compute {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<String>,
     #[doc = "This is the list of tags for your VM formatted as a JSON array for easier programmatic parsing."]
-    #[serde(rename = "tagsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tagsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags_list: Vec<TagsProperties>,
     #[doc = "The set of data specified when the VM was created for use during or after provisioning (Base64 encoded)"]
     #[serde(rename = "userData", default, skip_serializing_if = "Option::is_none")]
@@ -428,7 +438,11 @@ impl ManagedDisk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Network {
     #[doc = "This contains data about the network interface."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub interface: Vec<NetworkInterface>,
 }
 impl Network {
@@ -460,10 +474,19 @@ pub mod network_interface {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Ipv4 {
         #[doc = "This is the IP address"]
-        #[serde(rename = "ipAddress", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddress",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_address: Vec<Ipv4Properties>,
         #[doc = "This is the subnet"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub subnet: Vec<SubnetProperties>,
     }
     impl Ipv4 {
@@ -475,7 +498,12 @@ pub mod network_interface {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Ipv6 {
         #[doc = "This is the IP address"]
-        #[serde(rename = "ipAddress", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddress",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_address: Vec<Ipv6Properties>,
     }
     impl Ipv6 {
@@ -602,7 +630,12 @@ pub struct StorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
     #[doc = "Data disk information"]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
     #[doc = "This contains data for the size of local temp disk of the VM, if it exists."]
     #[serde(rename = "resourceDisk", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/imds/src/package_2021_03_01/models.rs b/services/svc/imds/src/package_2021_03_01/models.rs
index b11dc6d36f..26a8b89bc5 100644
--- a/services/svc/imds/src/package_2021_03_01/models.rs
+++ b/services/svc/imds/src/package_2021_03_01/models.rs
@@ -59,7 +59,12 @@ pub struct Compute {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub plan: Option<PlanProperties>,
     #[doc = "This is information about the SSH certificate"]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<PublicKeysProperties>,
     #[doc = "This is the fault domain in which the VM."]
     #[serde(rename = "platformFaultDomain", default, skip_serializing_if = "Option::is_none")]
@@ -98,7 +103,12 @@ pub struct Compute {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<String>,
     #[doc = "This is the list of tags for your VM formatted as a JSON array for easier programmatic parsing."]
-    #[serde(rename = "tagsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tagsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags_list: Vec<TagsProperties>,
     #[doc = "The set of data specified when the VM was created for use during or after provisioning (Base64 encoded)"]
     #[serde(rename = "userData", default, skip_serializing_if = "Option::is_none")]
@@ -449,7 +459,11 @@ impl ManagedDisk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Network {
     #[doc = "This contains data about the network interface."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub interface: Vec<NetworkInterface>,
 }
 impl Network {
@@ -481,10 +495,19 @@ pub mod network_interface {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Ipv4 {
         #[doc = "This is the IP address"]
-        #[serde(rename = "ipAddress", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddress",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_address: Vec<Ipv4Properties>,
         #[doc = "This is the subnet"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub subnet: Vec<SubnetProperties>,
     }
     impl Ipv4 {
@@ -496,7 +519,12 @@ pub mod network_interface {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Ipv6 {
         #[doc = "This is the IP address"]
-        #[serde(rename = "ipAddress", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddress",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_address: Vec<Ipv6Properties>,
     }
     impl Ipv6 {
@@ -623,7 +651,12 @@ pub struct StorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
     #[doc = "Data disk information"]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
     #[doc = "This contains data for the size of local temp disk of the VM, if it exists."]
     #[serde(rename = "resourceDisk", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/imds/src/package_2021_05_01/models.rs b/services/svc/imds/src/package_2021_05_01/models.rs
index 497b757459..37da9fed5c 100644
--- a/services/svc/imds/src/package_2021_05_01/models.rs
+++ b/services/svc/imds/src/package_2021_05_01/models.rs
@@ -59,7 +59,12 @@ pub struct Compute {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub plan: Option<PlanProperties>,
     #[doc = "This is information about the SSH certificate"]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<PublicKeysProperties>,
     #[doc = "This is the fault domain in which the VM."]
     #[serde(rename = "platformFaultDomain", default, skip_serializing_if = "Option::is_none")]
@@ -98,7 +103,12 @@ pub struct Compute {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<String>,
     #[doc = "This is the list of tags for your VM formatted as a JSON array for easier programmatic parsing."]
-    #[serde(rename = "tagsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tagsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags_list: Vec<TagsProperties>,
     #[doc = "The set of data specified when the VM was created for use during or after provisioning (Base64 encoded)"]
     #[serde(rename = "userData", default, skip_serializing_if = "Option::is_none")]
@@ -464,7 +474,11 @@ impl ManagedDisk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Network {
     #[doc = "This contains data about the network interface."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub interface: Vec<NetworkInterface>,
 }
 impl Network {
@@ -496,10 +510,19 @@ pub mod network_interface {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Ipv4 {
         #[doc = "This is the IP address"]
-        #[serde(rename = "ipAddress", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddress",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_address: Vec<Ipv4Properties>,
         #[doc = "This is the subnet"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub subnet: Vec<SubnetProperties>,
     }
     impl Ipv4 {
@@ -511,7 +534,12 @@ pub mod network_interface {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Ipv6 {
         #[doc = "This is the IP address"]
-        #[serde(rename = "ipAddress", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddress",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_address: Vec<Ipv6Properties>,
     }
     impl Ipv6 {
@@ -638,7 +666,12 @@ pub struct StorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
     #[doc = "Data disk information"]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
     #[doc = "This contains data for the size of local temp disk of the VM, if it exists."]
     #[serde(rename = "resourceDisk", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/imds/src/package_2021_10_01/models.rs b/services/svc/imds/src/package_2021_10_01/models.rs
index 9360bc4b84..84df5675cc 100644
--- a/services/svc/imds/src/package_2021_10_01/models.rs
+++ b/services/svc/imds/src/package_2021_10_01/models.rs
@@ -59,7 +59,12 @@ pub struct Compute {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub plan: Option<PlanProperties>,
     #[doc = "This is information about the SSH certificate"]
-    #[serde(rename = "publicKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "publicKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub public_keys: Vec<PublicKeysProperties>,
     #[doc = "This is the fault domain the VM resides in."]
     #[serde(rename = "platformFaultDomain", default, skip_serializing_if = "Option::is_none")]
@@ -101,7 +106,12 @@ pub struct Compute {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<String>,
     #[doc = "This is the list of tags for your VM formatted as a JSON array for easier programmatic parsing."]
-    #[serde(rename = "tagsList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "tagsList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags_list: Vec<TagsProperties>,
     #[doc = "The set of data specified when the VM was created for use during or after provisioning (Base64 encoded)"]
     #[serde(rename = "userData", default, skip_serializing_if = "Option::is_none")]
@@ -467,7 +477,11 @@ impl ManagedDisk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Network {
     #[doc = "This contains data about the network interface."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub interface: Vec<NetworkInterface>,
 }
 impl Network {
@@ -499,10 +513,19 @@ pub mod network_interface {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Ipv4 {
         #[doc = "This is the IP address"]
-        #[serde(rename = "ipAddress", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddress",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_address: Vec<Ipv4Properties>,
         #[doc = "This is the subnet"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub subnet: Vec<SubnetProperties>,
     }
     impl Ipv4 {
@@ -514,7 +537,12 @@ pub mod network_interface {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Ipv6 {
         #[doc = "This is the IP address"]
-        #[serde(rename = "ipAddress", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "ipAddress",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub ip_address: Vec<Ipv6Properties>,
     }
     impl Ipv6 {
@@ -641,7 +669,12 @@ pub struct StorageProfile {
     #[serde(rename = "osDisk", default, skip_serializing_if = "Option::is_none")]
     pub os_disk: Option<OsDisk>,
     #[doc = "Data disk information"]
-    #[serde(rename = "dataDisks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataDisks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_disks: Vec<DataDisk>,
     #[doc = "This contains data for the size of local temp disk of the VM, if it exists."]
     #[serde(rename = "resourceDisk", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/iotcentral/src/package_1_2_preview/models.rs b/services/svc/iotcentral/src/package_1_2_preview/models.rs
index 16329ef360..ceecec0e56 100644
--- a/services/svc/iotcentral/src/package_1_2_preview/models.rs
+++ b/services/svc/iotcentral/src/package_1_2_preview/models.rs
@@ -327,7 +327,11 @@ pub struct DataExportStatus {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "Errors encountered by the export or destination."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<DataExportError>,
     #[doc = "The timestamp of the last message that was sent to the export or destination."]
     #[serde(rename = "lastExportTime", default, with = "azure_core::date::rfc3339::option")]
@@ -435,7 +439,11 @@ pub struct Device {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub simulated: Option<bool>,
     #[doc = "List of organization IDs that the device is a part of."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub organizations: Vec<String>,
 }
 impl Device {
@@ -552,7 +560,11 @@ pub struct DeviceGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "List of organization IDs of the device group."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub organizations: Vec<String>,
 }
 impl DeviceGroup {
@@ -1016,7 +1028,11 @@ pub struct Job {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "List of organizations of the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub organizations: Vec<String>,
 }
 impl Job {
diff --git a/services/svc/iotcentral/src/package_2022_05_31/models.rs b/services/svc/iotcentral/src/package_2022_05_31/models.rs
index 67adc37e17..1bcd40fa2f 100644
--- a/services/svc/iotcentral/src/package_2022_05_31/models.rs
+++ b/services/svc/iotcentral/src/package_2022_05_31/models.rs
@@ -128,7 +128,11 @@ pub struct Device {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub simulated: Option<bool>,
     #[doc = "List of organization IDs that the device is a part of, only one organization support today, multiple organizations will be supported soon."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub organizations: Vec<String>,
 }
 impl Device {
@@ -247,7 +251,11 @@ pub struct DeviceGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "List of organization IDs of the device group, only one organization support today, multiple organizations will be supported soon."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub organizations: Vec<String>,
 }
 impl DeviceGroup {
diff --git a/services/svc/iotcentral/src/package_2022_06_30_preview/models.rs b/services/svc/iotcentral/src/package_2022_06_30_preview/models.rs
index a93c684185..9b8f1af404 100644
--- a/services/svc/iotcentral/src/package_2022_06_30_preview/models.rs
+++ b/services/svc/iotcentral/src/package_2022_06_30_preview/models.rs
@@ -355,7 +355,11 @@ pub struct Dashboard {
     #[serde(rename = "displayName")]
     pub display_name: String,
     #[doc = "The tiles displayed by the dashboard."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tiles: Vec<Tile>,
     #[doc = "Whether the dashboard is personal and can only be viewed by the current user."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -367,7 +371,11 @@ pub struct Dashboard {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "The organization the dashboard belongs to. If not present, the dashboard is root-level or personal. only one organization is supported today, multiple organizations will be supported soon."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub organizations: Vec<String>,
 }
 impl Dashboard {
@@ -533,7 +541,11 @@ pub struct DataExportStatus {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "Errors encountered by the export or destination."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<DataExportError>,
     #[doc = "The timestamp of the last message that was sent to the export or destination."]
     #[serde(rename = "lastExportTime", default, with = "azure_core::date::rfc3339::option")]
@@ -655,7 +667,11 @@ pub struct Device {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub simulated: Option<bool>,
     #[doc = "List of organization IDs that the device is a part of, only one organization is supported today, multiple organizations will be supported soon."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub organizations: Vec<String>,
 }
 impl Device {
@@ -795,7 +811,11 @@ pub struct DeviceGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "List of organization IDs of the device group, only one organization is supported today, multiple organizations will be supported soon."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub organizations: Vec<String>,
 }
 impl DeviceGroup {
@@ -1592,7 +1612,11 @@ pub struct Job {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "List of organizations of the job, only one organization is supported today, multiple organizations will be supported soon."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub organizations: Vec<String>,
 }
 impl Job {
@@ -2250,7 +2274,11 @@ pub struct ScheduledJob {
     #[doc = "Data related to the operation being performed by this job. All entries must be of the same type."]
     pub data: Vec<JobData>,
     #[doc = "List of organizations of the job, only one organization is supported today, multiple organizations will be supported soon."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub organizations: Vec<String>,
     #[doc = "The schedule definition of job."]
     pub schedule: JobSchedule,
@@ -2666,7 +2694,11 @@ impl TileCapability {
 #[doc = "Configuration specifying an array of capabilities to be displayed in the tile."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TileCapabilityConfiguration {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub capabilities: Vec<TileCapability>,
 }
 impl TileCapabilityConfiguration {
diff --git a/services/svc/iotcentral/src/package_2022_07_31/models.rs b/services/svc/iotcentral/src/package_2022_07_31/models.rs
index af87f0af42..7e6a085373 100644
--- a/services/svc/iotcentral/src/package_2022_07_31/models.rs
+++ b/services/svc/iotcentral/src/package_2022_07_31/models.rs
@@ -189,7 +189,11 @@ pub struct Device {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub simulated: Option<bool>,
     #[doc = "List of organization IDs that the device is a part of, only one organization is supported today, multiple organizations will be supported soon."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub organizations: Vec<String>,
 }
 impl Device {
@@ -308,7 +312,11 @@ pub struct DeviceGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub etag: Option<String>,
     #[doc = "List of organization IDs of the device group, only one organization is supported today, multiple organizations will be supported soon."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub organizations: Vec<String>,
 }
 impl DeviceGroup {
@@ -743,7 +751,11 @@ pub struct Job {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<String>,
     #[doc = "List of organizations of the job, only one organization is supported today, multiple organizations will be supported soon."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub organizations: Vec<String>,
 }
 impl Job {
@@ -1109,7 +1121,11 @@ pub struct ScheduledJob {
     #[doc = "Data related to the operation being performed by this job. All entries must be of the same type."]
     pub data: Vec<JobData>,
     #[doc = "List of organizations of the job, only one organization is supported today, multiple organizations will be supported soon."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub organizations: Vec<String>,
     #[doc = "The schedule definition of job."]
     pub schedule: JobSchedule,
diff --git a/services/svc/keyvault/src/package_7_1_preview/models.rs b/services/svc/keyvault/src/package_7_1_preview/models.rs
index ac958331f7..456e9be8a2 100644
--- a/services/svc/keyvault/src/package_7_1_preview/models.rs
+++ b/services/svc/keyvault/src/package_7_1_preview/models.rs
@@ -296,7 +296,11 @@ impl CertificateIssuerItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateIssuerListResult {
     #[doc = "A response message containing a list of certificate issuers in the key vault along with a link to the next page of certificate issuers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateIssuerItem>,
     #[doc = "The URL to get the next set of certificate issuers."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -384,7 +388,11 @@ impl CertificateItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListResult {
     #[doc = "A response message containing a list of certificates in the key vault along with a link to the next page of certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateItem>,
     #[doc = "The URL to get the next set of certificates."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -485,7 +493,11 @@ pub struct CertificatePolicy {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub x509_props: Option<X509CertificateProperties>,
     #[doc = "Actions that will be performed by Key Vault over the lifetime of a certificate."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub lifetime_actions: Vec<LifetimeAction>,
     #[doc = "Parameters for the issuer of the X509 component of a certificate."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -553,7 +565,11 @@ pub struct Contacts {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "The contact list for the vault certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contacts: Vec<Contact>,
 }
 impl Contacts {
@@ -605,7 +621,11 @@ impl DeletedCertificateItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedCertificateListResult {
     #[doc = "A response message containing a list of deleted certificates in the vault along with a link to the next page of deleted certificates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedCertificateItem>,
     #[doc = "The URL to get the next set of deleted certificates."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -666,7 +686,11 @@ impl DeletedKeyItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedKeyListResult {
     #[doc = "A response message containing a list of deleted keys in the vault along with a link to the next page of deleted keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedKeyItem>,
     #[doc = "The URL to get the next set of deleted keys."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -727,7 +751,11 @@ impl DeletedSasDefinitionItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedSasDefinitionListResult {
     #[doc = "A response message containing a list of the deleted SAS definitions in the vault along with a link to the next page of deleted sas definitions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedSasDefinitionItem>,
     #[doc = "The URL to get the next set of deleted SAS definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -788,7 +816,11 @@ impl DeletedSecretItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedSecretListResult {
     #[doc = "A response message containing a list of the deleted secrets in the vault along with a link to the next page of deleted secrets"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedSecretItem>,
     #[doc = "The URL to get the next set of deleted secrets."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -849,7 +881,11 @@ impl DeletedStorageBundle {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedStorageListResult {
     #[doc = "A response message containing a list of the deleted storage accounts in the vault along with a link to the next page of deleted storage accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedStorageAccountItem>,
     #[doc = "The URL to get the next set of deleted storage accounts."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -968,7 +1004,11 @@ pub struct JsonWebKey {
     #[doc = "JsonWebKey Key Type (kty), as defined in https://tools.ietf.org/html/draft-ietf-jose-json-web-algorithms-40."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kty: Option<json_web_key::Kty>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "RSA modulus."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1217,7 +1257,11 @@ pub struct KeyCreateParameters {
     #[doc = "The key size in bits. For example: 2048, 3072, or 4096 for RSA."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub key_size: Option<i32>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "The attributes of a key managed by the key vault service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1387,7 +1431,11 @@ impl KeyItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyListResult {
     #[doc = "A response message containing a list of keys in the key vault along with a link to the next page of keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KeyItem>,
     #[doc = "The URL to get the next set of keys."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1691,7 +1739,11 @@ pub mod key_sign_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyUpdateParameters {
     #[doc = "Json web key operations. For more information on possible key operations, see JsonWebKeyOperation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "The attributes of a key managed by the key vault service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1841,7 +1893,11 @@ pub struct OrganizationDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Details of the organization administrator."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub admin_details: Vec<AdministratorDetails>,
 }
 impl OrganizationDetails {
@@ -2114,7 +2170,11 @@ impl SasDefinitionItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SasDefinitionListResult {
     #[doc = "A response message containing a list of SAS definitions along with a link to the next page of SAS definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SasDefinitionItem>,
     #[doc = "The URL to get the next set of SAS definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2332,7 +2392,11 @@ impl SecretItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecretListResult {
     #[doc = "A response message containing a list of secrets in the key vault along with a link to the next page of secrets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SecretItem>,
     #[doc = "The URL to get the next set of secrets."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2624,7 +2688,11 @@ impl StorageBundle {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageListResult {
     #[doc = "A response message containing a list of storage accounts in the key vault along with a link to the next page of storage accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccountItem>,
     #[doc = "The URL to get the next set of storage accounts."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2656,13 +2724,25 @@ impl StorageRestoreParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubjectAlternativeNames {
     #[doc = "Email addresses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
     #[doc = "Domain names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_names: Vec<String>,
     #[doc = "User principal names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upns: Vec<String>,
 }
 impl SubjectAlternativeNames {
@@ -2692,13 +2772,21 @@ pub struct X509CertificateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub subject: Option<String>,
     #[doc = "The enhanced key usage."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ekus: Vec<String>,
     #[doc = "The subject alternate names of a X509 object."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sans: Option<SubjectAlternativeNames>,
     #[doc = "List of key usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_usage: Vec<String>,
     #[doc = "The duration that the certificate is valid in months."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/keyvault/src/package_7_2/models.rs b/services/svc/keyvault/src/package_7_2/models.rs
index cbf386f7ee..66424ab8e7 100644
--- a/services/svc/keyvault/src/package_7_2/models.rs
+++ b/services/svc/keyvault/src/package_7_2/models.rs
@@ -312,7 +312,11 @@ impl CertificateIssuerItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateIssuerListResult {
     #[doc = "A response message containing a list of certificate issuers in the key vault along with a link to the next page of certificate issuers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateIssuerItem>,
     #[doc = "The URL to get the next set of certificate issuers."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -400,7 +404,11 @@ impl CertificateItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListResult {
     #[doc = "A response message containing a list of certificates in the key vault along with a link to the next page of certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateItem>,
     #[doc = "The URL to get the next set of certificates."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -501,7 +509,11 @@ pub struct CertificatePolicy {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub x509_props: Option<X509CertificateProperties>,
     #[doc = "Actions that will be performed by Key Vault over the lifetime of a certificate."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub lifetime_actions: Vec<LifetimeAction>,
     #[doc = "Parameters for the issuer of the X509 component of a certificate."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -569,7 +581,11 @@ pub struct Contacts {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "The contact list for the vault certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contacts: Vec<Contact>,
 }
 impl Contacts {
@@ -809,7 +825,11 @@ impl DeletedCertificateItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedCertificateListResult {
     #[doc = "A response message containing a list of deleted certificates in the vault along with a link to the next page of deleted certificates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedCertificateItem>,
     #[doc = "The URL to get the next set of deleted certificates."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -870,7 +890,11 @@ impl DeletedKeyItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedKeyListResult {
     #[doc = "A response message containing a list of deleted keys in the vault along with a link to the next page of deleted keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedKeyItem>,
     #[doc = "The URL to get the next set of deleted keys."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -931,7 +955,11 @@ impl DeletedSasDefinitionItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedSasDefinitionListResult {
     #[doc = "A response message containing a list of the deleted SAS definitions in the vault along with a link to the next page of deleted sas definitions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedSasDefinitionItem>,
     #[doc = "The URL to get the next set of deleted SAS definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -992,7 +1020,11 @@ impl DeletedSecretItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedSecretListResult {
     #[doc = "A response message containing a list of the deleted secrets in the vault along with a link to the next page of deleted secrets"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedSecretItem>,
     #[doc = "The URL to get the next set of deleted secrets."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1053,7 +1085,11 @@ impl DeletedStorageBundle {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedStorageListResult {
     #[doc = "A response message containing a list of the deleted storage accounts in the vault along with a link to the next page of deleted storage accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedStorageAccountItem>,
     #[doc = "The URL to get the next set of deleted storage accounts."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1202,7 +1238,11 @@ pub struct JsonWebKey {
     #[doc = "JsonWebKey Key Type (kty), as defined in https://tools.ietf.org/html/draft-ietf-jose-json-web-algorithms-40."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kty: Option<json_web_key::Kty>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "RSA modulus."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1457,7 +1497,11 @@ pub struct KeyCreateParameters {
     #[doc = "The public exponent for a RSA key."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub public_exponent: Option<i32>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "The attributes of a key managed by the key vault service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1631,7 +1675,11 @@ impl KeyItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyListResult {
     #[doc = "A response message containing a list of keys in the key vault along with a link to the next page of keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KeyItem>,
     #[doc = "The URL to get the next set of keys."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1995,7 +2043,11 @@ pub mod key_sign_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyUpdateParameters {
     #[doc = "Json web key operations. For more information on possible key operations, see JsonWebKeyOperation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "The attributes of a key managed by the key vault service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2145,7 +2197,11 @@ pub struct OrganizationDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Details of the organization administrator."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub admin_details: Vec<AdministratorDetails>,
 }
 impl OrganizationDetails {
@@ -2169,16 +2225,35 @@ impl PendingCertificateSigningRequestResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permission {
     #[doc = "Action permissions that are granted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Action permissions that are excluded but not denied. They may be granted by other role definitions assigned to a principal."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<String>,
     #[doc = "Data action permissions that are granted."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<DataAction>,
     #[doc = "Data action permissions that are excluded but not denied. They may be granted by other role definitions assigned to a principal."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<DataAction>,
 }
 impl Permission {
@@ -2277,7 +2352,11 @@ impl RoleAssignmentFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleAssignmentListResult {
     #[doc = "Role assignment list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleAssignment>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2419,7 +2498,11 @@ impl RoleDefinitionFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleDefinitionListResult {
     #[doc = "Role definition list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2449,10 +2532,19 @@ pub struct RoleDefinitionProperties {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<role_definition_properties::Type>,
     #[doc = "Role definition permissions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<Permission>,
     #[doc = "Role definition assignable scopes."]
-    #[serde(rename = "assignableScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assignableScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assignable_scopes: Vec<RoleScope>,
 }
 impl RoleDefinitionProperties {
@@ -2809,7 +2901,11 @@ impl SasDefinitionItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SasDefinitionListResult {
     #[doc = "A response message containing a list of SAS definitions along with a link to the next page of SAS definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SasDefinitionItem>,
     #[doc = "The URL to get the next set of SAS definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3027,7 +3123,11 @@ impl SecretItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecretListResult {
     #[doc = "A response message containing a list of secrets in the key vault along with a link to the next page of secrets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SecretItem>,
     #[doc = "The URL to get the next set of secrets."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3445,7 +3545,11 @@ impl StorageBundle {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageListResult {
     #[doc = "A response message containing a list of storage accounts in the key vault along with a link to the next page of storage accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccountItem>,
     #[doc = "The URL to get the next set of storage accounts."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3477,13 +3581,25 @@ impl StorageRestoreParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubjectAlternativeNames {
     #[doc = "Email addresses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
     #[doc = "Domain names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_names: Vec<String>,
     #[doc = "User principal names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upns: Vec<String>,
 }
 impl SubjectAlternativeNames {
@@ -3528,13 +3644,21 @@ pub struct X509CertificateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub subject: Option<String>,
     #[doc = "The enhanced key usage."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ekus: Vec<String>,
     #[doc = "The subject alternate names of a X509 object."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sans: Option<SubjectAlternativeNames>,
     #[doc = "List of key usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_usage: Vec<String>,
     #[doc = "The duration that the certificate is valid in months."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/keyvault/src/package_7_2_preview/models.rs b/services/svc/keyvault/src/package_7_2_preview/models.rs
index 5080c529bc..f6709a4369 100644
--- a/services/svc/keyvault/src/package_7_2_preview/models.rs
+++ b/services/svc/keyvault/src/package_7_2_preview/models.rs
@@ -312,7 +312,11 @@ impl CertificateIssuerItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateIssuerListResult {
     #[doc = "A response message containing a list of certificate issuers in the key vault along with a link to the next page of certificate issuers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateIssuerItem>,
     #[doc = "The URL to get the next set of certificate issuers."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -400,7 +404,11 @@ impl CertificateItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListResult {
     #[doc = "A response message containing a list of certificates in the key vault along with a link to the next page of certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateItem>,
     #[doc = "The URL to get the next set of certificates."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -501,7 +509,11 @@ pub struct CertificatePolicy {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub x509_props: Option<X509CertificateProperties>,
     #[doc = "Actions that will be performed by Key Vault over the lifetime of a certificate."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub lifetime_actions: Vec<LifetimeAction>,
     #[doc = "Parameters for the issuer of the X509 component of a certificate."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -569,7 +581,11 @@ pub struct Contacts {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "The contact list for the vault certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contacts: Vec<Contact>,
 }
 impl Contacts {
@@ -799,7 +815,11 @@ impl DeletedCertificateItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedCertificateListResult {
     #[doc = "A response message containing a list of deleted certificates in the vault along with a link to the next page of deleted certificates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedCertificateItem>,
     #[doc = "The URL to get the next set of deleted certificates."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -860,7 +880,11 @@ impl DeletedKeyItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedKeyListResult {
     #[doc = "A response message containing a list of deleted keys in the vault along with a link to the next page of deleted keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedKeyItem>,
     #[doc = "The URL to get the next set of deleted keys."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -921,7 +945,11 @@ impl DeletedSasDefinitionItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedSasDefinitionListResult {
     #[doc = "A response message containing a list of the deleted SAS definitions in the vault along with a link to the next page of deleted sas definitions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedSasDefinitionItem>,
     #[doc = "The URL to get the next set of deleted SAS definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -982,7 +1010,11 @@ impl DeletedSecretItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedSecretListResult {
     #[doc = "A response message containing a list of the deleted secrets in the vault along with a link to the next page of deleted secrets"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedSecretItem>,
     #[doc = "The URL to get the next set of deleted secrets."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1043,7 +1075,11 @@ impl DeletedStorageBundle {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedStorageListResult {
     #[doc = "A response message containing a list of the deleted storage accounts in the vault along with a link to the next page of deleted storage accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedStorageAccountItem>,
     #[doc = "The URL to get the next set of deleted storage accounts."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1192,7 +1228,11 @@ pub struct JsonWebKey {
     #[doc = "JsonWebKey Key Type (kty), as defined in https://tools.ietf.org/html/draft-ietf-jose-json-web-algorithms-40."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kty: Option<json_web_key::Kty>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "RSA modulus."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1447,7 +1487,11 @@ pub struct KeyCreateParameters {
     #[doc = "The public exponent for a RSA key."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub public_exponent: Option<i32>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "The attributes of a key managed by the key vault service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1621,7 +1665,11 @@ impl KeyItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyListResult {
     #[doc = "A response message containing a list of keys in the key vault along with a link to the next page of keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KeyItem>,
     #[doc = "The URL to get the next set of keys."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1985,7 +2033,11 @@ pub mod key_sign_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyUpdateParameters {
     #[doc = "Json web key operations. For more information on possible key operations, see JsonWebKeyOperation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "The attributes of a key managed by the key vault service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2135,7 +2187,11 @@ pub struct OrganizationDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Details of the organization administrator."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub admin_details: Vec<AdministratorDetails>,
 }
 impl OrganizationDetails {
@@ -2159,16 +2215,35 @@ impl PendingCertificateSigningRequestResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permission {
     #[doc = "Action permissions that are granted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Action permissions that are excluded but not denied. They may be granted by other role definitions assigned to a principal."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<String>,
     #[doc = "Data action permissions that are granted."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<DataAction>,
     #[doc = "Data action permissions that are excluded but not denied. They may be granted by other role definitions assigned to a principal."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<DataAction>,
 }
 impl Permission {
@@ -2267,7 +2342,11 @@ impl RoleAssignmentFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleAssignmentListResult {
     #[doc = "Role assignment list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleAssignment>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2409,7 +2488,11 @@ impl RoleDefinitionFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleDefinitionListResult {
     #[doc = "Role definition list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2439,10 +2522,19 @@ pub struct RoleDefinitionProperties {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<role_definition_properties::Type>,
     #[doc = "Role definition permissions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<Permission>,
     #[doc = "Role definition assignable scopes."]
-    #[serde(rename = "assignableScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assignableScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assignable_scopes: Vec<RoleScope>,
 }
 impl RoleDefinitionProperties {
@@ -2799,7 +2891,11 @@ impl SasDefinitionItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SasDefinitionListResult {
     #[doc = "A response message containing a list of SAS definitions along with a link to the next page of SAS definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SasDefinitionItem>,
     #[doc = "The URL to get the next set of SAS definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3017,7 +3113,11 @@ impl SecretItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecretListResult {
     #[doc = "A response message containing a list of secrets in the key vault along with a link to the next page of secrets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SecretItem>,
     #[doc = "The URL to get the next set of secrets."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3444,7 +3544,11 @@ impl StorageBundle {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageListResult {
     #[doc = "A response message containing a list of storage accounts in the key vault along with a link to the next page of storage accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccountItem>,
     #[doc = "The URL to get the next set of storage accounts."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3476,13 +3580,25 @@ impl StorageRestoreParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubjectAlternativeNames {
     #[doc = "Email addresses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
     #[doc = "Domain names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_names: Vec<String>,
     #[doc = "User principal names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upns: Vec<String>,
 }
 impl SubjectAlternativeNames {
@@ -3527,13 +3643,21 @@ pub struct X509CertificateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub subject: Option<String>,
     #[doc = "The enhanced key usage."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ekus: Vec<String>,
     #[doc = "The subject alternate names of a X509 object."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sans: Option<SubjectAlternativeNames>,
     #[doc = "List of key usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_usage: Vec<String>,
     #[doc = "The duration that the certificate is valid in months."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/keyvault/src/package_7_3/models.rs b/services/svc/keyvault/src/package_7_3/models.rs
index 11daa9e8a2..b0624f43c7 100644
--- a/services/svc/keyvault/src/package_7_3/models.rs
+++ b/services/svc/keyvault/src/package_7_3/models.rs
@@ -312,7 +312,11 @@ impl CertificateIssuerItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateIssuerListResult {
     #[doc = "A response message containing a list of certificate issuers in the key vault along with a link to the next page of certificate issuers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateIssuerItem>,
     #[doc = "The URL to get the next set of certificate issuers."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -400,7 +404,11 @@ impl CertificateItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListResult {
     #[doc = "A response message containing a list of certificates in the key vault along with a link to the next page of certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateItem>,
     #[doc = "The URL to get the next set of certificates."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -501,7 +509,11 @@ pub struct CertificatePolicy {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub x509_props: Option<X509CertificateProperties>,
     #[doc = "Actions that will be performed by Key Vault over the lifetime of a certificate."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub lifetime_actions: Vec<LifetimeAction>,
     #[doc = "Parameters for the issuer of the X509 component of a certificate."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -569,7 +581,11 @@ pub struct Contacts {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "The contact list for the vault certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contacts: Vec<Contact>,
 }
 impl Contacts {
@@ -824,7 +840,11 @@ impl DeletedCertificateItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedCertificateListResult {
     #[doc = "A response message containing a list of deleted certificates in the vault along with a link to the next page of deleted certificates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedCertificateItem>,
     #[doc = "The URL to get the next set of deleted certificates."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -885,7 +905,11 @@ impl DeletedKeyItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedKeyListResult {
     #[doc = "A response message containing a list of deleted keys in the vault along with a link to the next page of deleted keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedKeyItem>,
     #[doc = "The URL to get the next set of deleted keys."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -946,7 +970,11 @@ impl DeletedSasDefinitionItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedSasDefinitionListResult {
     #[doc = "A response message containing a list of the deleted SAS definitions in the vault along with a link to the next page of deleted sas definitions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedSasDefinitionItem>,
     #[doc = "The URL to get the next set of deleted SAS definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1007,7 +1035,11 @@ impl DeletedSecretItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedSecretListResult {
     #[doc = "A response message containing a list of the deleted secrets in the vault along with a link to the next page of deleted secrets"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedSecretItem>,
     #[doc = "The URL to get the next set of deleted secrets."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1068,7 +1100,11 @@ impl DeletedStorageBundle {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedStorageListResult {
     #[doc = "A response message containing a list of the deleted storage accounts in the vault along with a link to the next page of deleted storage accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedStorageAccountItem>,
     #[doc = "The URL to get the next set of deleted storage accounts."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1228,7 +1264,11 @@ pub struct JsonWebKey {
     #[doc = "JsonWebKey Key Type (kty), as defined in https://tools.ietf.org/html/draft-ietf-jose-json-web-algorithms-40."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kty: Option<json_web_key::Kty>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "RSA modulus."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1489,7 +1529,11 @@ pub struct KeyCreateParameters {
     #[doc = "The public exponent for a RSA key."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub public_exponent: Option<i32>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "The attributes of a key managed by the key vault service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1734,7 +1778,11 @@ impl KeyItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyListResult {
     #[doc = "A response message containing a list of keys in the key vault along with a link to the next page of keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KeyItem>,
     #[doc = "The URL to get the next set of keys."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2116,7 +2164,12 @@ pub struct KeyRotationPolicy {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Actions that will be performed by Key Vault over the lifetime of a key. For preview, lifetimeActions can only have two items at maximum: one for rotate, one for notify. Notification time would be default to 30 days before expiry and it is not configurable."]
-    #[serde(rename = "lifetimeActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "lifetimeActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub lifetime_actions: Vec<LifetimeActions>,
     #[doc = "The key rotation policy attributes."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2230,7 +2283,11 @@ pub mod key_sign_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyUpdateParameters {
     #[doc = "Json web key operations. For more information on possible key operations, see JsonWebKeyOperation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "The attributes of a key managed by the key vault service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2436,7 +2493,11 @@ pub struct OrganizationDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Details of the organization administrator."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub admin_details: Vec<AdministratorDetails>,
 }
 impl OrganizationDetails {
@@ -2460,16 +2521,35 @@ impl PendingCertificateSigningRequestResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permission {
     #[doc = "Action permissions that are granted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Action permissions that are excluded but not denied. They may be granted by other role definitions assigned to a principal."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<String>,
     #[doc = "Data action permissions that are granted."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<DataAction>,
     #[doc = "Data action permissions that are excluded but not denied. They may be granted by other role definitions assigned to a principal."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<DataAction>,
 }
 impl Permission {
@@ -2579,7 +2659,11 @@ impl RoleAssignmentFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleAssignmentListResult {
     #[doc = "Role assignment list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleAssignment>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2721,7 +2805,11 @@ impl RoleDefinitionFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleDefinitionListResult {
     #[doc = "Role definition list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2751,10 +2839,19 @@ pub struct RoleDefinitionProperties {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<role_definition_properties::Type>,
     #[doc = "Role definition permissions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<Permission>,
     #[doc = "Role definition assignable scopes."]
-    #[serde(rename = "assignableScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assignableScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assignable_scopes: Vec<RoleScope>,
 }
 impl RoleDefinitionProperties {
@@ -3111,7 +3208,11 @@ impl SasDefinitionItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SasDefinitionListResult {
     #[doc = "A response message containing a list of SAS definitions along with a link to the next page of SAS definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SasDefinitionItem>,
     #[doc = "The URL to get the next set of SAS definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3329,7 +3430,11 @@ impl SecretItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecretListResult {
     #[doc = "A response message containing a list of secrets in the key vault along with a link to the next page of secrets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SecretItem>,
     #[doc = "The URL to get the next set of secrets."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3747,7 +3852,11 @@ impl StorageBundle {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageListResult {
     #[doc = "A response message containing a list of storage accounts in the key vault along with a link to the next page of storage accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccountItem>,
     #[doc = "The URL to get the next set of storage accounts."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3779,13 +3888,25 @@ impl StorageRestoreParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubjectAlternativeNames {
     #[doc = "Email addresses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
     #[doc = "Domain names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_names: Vec<String>,
     #[doc = "User principal names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upns: Vec<String>,
 }
 impl SubjectAlternativeNames {
@@ -3830,13 +3951,21 @@ pub struct X509CertificateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub subject: Option<String>,
     #[doc = "The enhanced key usage."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ekus: Vec<String>,
     #[doc = "The subject alternate names of a X509 object."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sans: Option<SubjectAlternativeNames>,
     #[doc = "List of key usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_usage: Vec<String>,
     #[doc = "The duration that the certificate is valid in months."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/keyvault/src/package_preview_7_3_preview/models.rs b/services/svc/keyvault/src/package_preview_7_3_preview/models.rs
index ae05790222..072b506532 100644
--- a/services/svc/keyvault/src/package_preview_7_3_preview/models.rs
+++ b/services/svc/keyvault/src/package_preview_7_3_preview/models.rs
@@ -312,7 +312,11 @@ impl CertificateIssuerItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateIssuerListResult {
     #[doc = "A response message containing a list of certificate issuers in the key vault along with a link to the next page of certificate issuers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateIssuerItem>,
     #[doc = "The URL to get the next set of certificate issuers."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -400,7 +404,11 @@ impl CertificateItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CertificateListResult {
     #[doc = "A response message containing a list of certificates in the key vault along with a link to the next page of certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<CertificateItem>,
     #[doc = "The URL to get the next set of certificates."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -501,7 +509,11 @@ pub struct CertificatePolicy {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub x509_props: Option<X509CertificateProperties>,
     #[doc = "Actions that will be performed by Key Vault over the lifetime of a certificate."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub lifetime_actions: Vec<LifetimeAction>,
     #[doc = "Parameters for the issuer of the X509 component of a certificate."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -569,7 +581,11 @@ pub struct Contacts {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "The contact list for the vault certificates."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contacts: Vec<Contact>,
 }
 impl Contacts {
@@ -824,7 +840,11 @@ impl DeletedCertificateItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedCertificateListResult {
     #[doc = "A response message containing a list of deleted certificates in the vault along with a link to the next page of deleted certificates"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedCertificateItem>,
     #[doc = "The URL to get the next set of deleted certificates."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -885,7 +905,11 @@ impl DeletedKeyItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedKeyListResult {
     #[doc = "A response message containing a list of deleted keys in the vault along with a link to the next page of deleted keys"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedKeyItem>,
     #[doc = "The URL to get the next set of deleted keys."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -946,7 +970,11 @@ impl DeletedSasDefinitionItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedSasDefinitionListResult {
     #[doc = "A response message containing a list of the deleted SAS definitions in the vault along with a link to the next page of deleted sas definitions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedSasDefinitionItem>,
     #[doc = "The URL to get the next set of deleted SAS definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1007,7 +1035,11 @@ impl DeletedSecretItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedSecretListResult {
     #[doc = "A response message containing a list of the deleted secrets in the vault along with a link to the next page of deleted secrets"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedSecretItem>,
     #[doc = "The URL to get the next set of deleted secrets."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1068,7 +1100,11 @@ impl DeletedStorageBundle {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeletedStorageListResult {
     #[doc = "A response message containing a list of the deleted storage accounts in the vault along with a link to the next page of deleted storage accounts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DeletedStorageAccountItem>,
     #[doc = "The URL to get the next set of deleted storage accounts."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -1228,7 +1264,11 @@ pub struct JsonWebKey {
     #[doc = "JsonWebKey Key Type (kty), as defined in https://tools.ietf.org/html/draft-ietf-jose-json-web-algorithms-40."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub kty: Option<json_web_key::Kty>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "RSA modulus."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1488,7 +1528,11 @@ pub struct KeyCreateParameters {
     #[doc = "The public exponent for a RSA key."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub public_exponent: Option<i32>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "The attributes of a key managed by the key vault service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1731,7 +1775,11 @@ impl KeyItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyListResult {
     #[doc = "A response message containing a list of keys in the key vault along with a link to the next page of keys."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<KeyItem>,
     #[doc = "The URL to get the next set of keys."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2112,7 +2160,12 @@ pub struct KeyRotationPolicy {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Actions that will be performed by Key Vault over the lifetime of a key. For preview, lifetimeActions can only have two items at maximum: one for rotate, one for notify. Notification time would be default to 30 days before expiry and it is not configurable."]
-    #[serde(rename = "lifetimeActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "lifetimeActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub lifetime_actions: Vec<LifetimeActions>,
     #[doc = "The key rotation policy attributes."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2226,7 +2279,11 @@ pub mod key_sign_parameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct KeyUpdateParameters {
     #[doc = "Json web key operations. For more information on possible key operations, see JsonWebKeyOperation."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_ops: Vec<String>,
     #[doc = "The attributes of a key managed by the key vault service."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2431,7 +2488,11 @@ pub struct OrganizationDetails {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "Details of the organization administrator."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub admin_details: Vec<AdministratorDetails>,
 }
 impl OrganizationDetails {
@@ -2455,16 +2516,35 @@ impl PendingCertificateSigningRequestResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Permission {
     #[doc = "Action permissions that are granted."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Action permissions that are excluded but not denied. They may be granted by other role definitions assigned to a principal."]
-    #[serde(rename = "notActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_actions: Vec<String>,
     #[doc = "Data action permissions that are granted."]
-    #[serde(rename = "dataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_actions: Vec<DataAction>,
     #[doc = "Data action permissions that are excluded but not denied. They may be granted by other role definitions assigned to a principal."]
-    #[serde(rename = "notDataActions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "notDataActions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub not_data_actions: Vec<DataAction>,
 }
 impl Permission {
@@ -2574,7 +2654,11 @@ impl RoleAssignmentFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleAssignmentListResult {
     #[doc = "Role assignment list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleAssignment>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2716,7 +2800,11 @@ impl RoleDefinitionFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RoleDefinitionListResult {
     #[doc = "Role definition list."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RoleDefinition>,
     #[doc = "The URL to use for getting the next set of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -2746,10 +2834,19 @@ pub struct RoleDefinitionProperties {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<role_definition_properties::Type>,
     #[doc = "Role definition permissions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<Permission>,
     #[doc = "Role definition assignable scopes."]
-    #[serde(rename = "assignableScopes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assignableScopes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assignable_scopes: Vec<RoleScope>,
 }
 impl RoleDefinitionProperties {
@@ -3106,7 +3203,11 @@ impl SasDefinitionItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SasDefinitionListResult {
     #[doc = "A response message containing a list of SAS definitions along with a link to the next page of SAS definitions."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SasDefinitionItem>,
     #[doc = "The URL to get the next set of SAS definitions."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3324,7 +3425,11 @@ impl SecretItem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SecretListResult {
     #[doc = "A response message containing a list of secrets in the key vault along with a link to the next page of secrets."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SecretItem>,
     #[doc = "The URL to get the next set of secrets."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3742,7 +3847,11 @@ impl StorageBundle {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct StorageListResult {
     #[doc = "A response message containing a list of storage accounts in the key vault along with a link to the next page of storage accounts."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<StorageAccountItem>,
     #[doc = "The URL to get the next set of storage accounts."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -3774,13 +3883,25 @@ impl StorageRestoreParameters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SubjectAlternativeNames {
     #[doc = "Email addresses."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub emails: Vec<String>,
     #[doc = "Domain names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dns_names: Vec<String>,
     #[doc = "User principal names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upns: Vec<String>,
 }
 impl SubjectAlternativeNames {
@@ -3825,13 +3946,21 @@ pub struct X509CertificateProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub subject: Option<String>,
     #[doc = "The enhanced key usage."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ekus: Vec<String>,
     #[doc = "The subject alternate names of a X509 object."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub sans: Option<SubjectAlternativeNames>,
     #[doc = "List of key usages."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub key_usage: Vec<String>,
     #[doc = "The duration that the certificate is valid in months."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/loadtestservice/src/package_2021_07_01_preview/models.rs b/services/svc/loadtestservice/src/package_2021_07_01_preview/models.rs
index 60365b5c12..62eed9aa43 100644
--- a/services/svc/loadtestservice/src/package_2021_07_01_preview/models.rs
+++ b/services/svc/loadtestservice/src/package_2021_07_01_preview/models.rs
@@ -146,7 +146,11 @@ pub struct ErrorResponseBody {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Additional details and inner errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorResponseBody>,
 }
 impl ErrorResponseBody {
@@ -178,7 +182,11 @@ impl FileUrl {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileUrlList {
     #[doc = "List of file urls"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<FileUrl>,
 }
 impl FileUrlList {
@@ -221,10 +229,20 @@ impl FileValidateResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Filters {
     #[doc = "List of request sampler for the test run, for which client metrics can be filtered"]
-    #[serde(rename = "requestSamplerValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestSamplerValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_sampler_values: Vec<String>,
     #[doc = "List of errors occurred for the test run, for which client metrics can be filtered"]
-    #[serde(rename = "errorFiltersValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorFiltersValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_filters_values: Vec<String>,
 }
 impl Filters {
@@ -245,7 +263,12 @@ pub struct InputTestArtifacts {
     #[serde(rename = "inputArtifactsZipFileurl", default, skip_serializing_if = "Option::is_none")]
     pub input_artifacts_zip_fileurl: Option<FileUrl>,
     #[doc = "[ReadOnly]The input artifacts file { name : url } map for the test run"]
-    #[serde(rename = "additionalUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_urls: Vec<FileUrl>,
 }
 impl InputTestArtifacts {
@@ -444,7 +467,11 @@ impl ServerMetricsModel {
 #[doc = "Supported azure resource types for app component like Microsoft.LoadTestService/loadtests, Microsoft.ClassicCompute, Microsoft.ClassicStorage etc. (Refer for full list of available resource types in azure : https://docs.microsoft.com/en-us/azure/azure-resource-manager/management/resource-providers-and-types, some of them we are supporting for server side metrics configuration)"]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedResourceType {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl SupportedResourceType {
@@ -521,7 +548,11 @@ impl TestModel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestModelResourceList {
     #[doc = "List of Resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TestModel>,
     #[doc = "Continuation token for list of resources in case of paginated results, if applicable"]
     #[serde(rename = "continuationToken", default, skip_serializing_if = "Option::is_none")]
@@ -613,7 +644,11 @@ impl TestRunModel {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TestRunModelResourceList {
     #[doc = "List of Resources"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<TestRunModel>,
     #[doc = "Continuation token for list of resources in case of paginated results, if applicable"]
     #[serde(rename = "continuationToken", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/loadtestservice/src/package_2022_06_01_preview/models.rs b/services/svc/loadtestservice/src/package_2022_06_01_preview/models.rs
index 2704811165..af109bc04b 100644
--- a/services/svc/loadtestservice/src/package_2022_06_01_preview/models.rs
+++ b/services/svc/loadtestservice/src/package_2022_06_01_preview/models.rs
@@ -89,13 +89,26 @@ impl ClientMetricsFilters {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct ClientMetricsRequestModel {
     #[doc = "List of request samplers, maximum supported samplers for queries are 20. In case of empty, it will return metrics for maximum 20 samplers"]
-    #[serde(rename = "requestSamplers", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestSamplers",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_samplers: Vec<String>,
     #[doc = "List of errors, maximum supported errors for queries are 20. In case of empty, by default will return metrics for maximum 20 errors"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub errors: Vec<String>,
     #[doc = "List of percentiles values for response time, supported values 50,90,99,95. Default value is 50th percentile."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub percentiles: Vec<String>,
     #[doc = "For test duration less than 10 minutes group by time interval can be any one of 5s,10s,1m,5m.\\n\\nFor test duration greater than 10 minutes, group by time interval can be any one of 1m,5m,1h. Default value is 1m."]
     #[serde(rename = "groupByInterval", default, skip_serializing_if = "Option::is_none")]
@@ -176,7 +189,11 @@ pub struct Error {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "Additional details and inner errors."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
 }
 impl Error {
@@ -242,10 +259,20 @@ impl FileUrlList {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Filters {
     #[doc = "List of request sampler for the test run, for which client metrics can be filtered."]
-    #[serde(rename = "requestSamplerValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "requestSamplerValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub request_sampler_values: Vec<String>,
     #[doc = "List of errors occurred for the test run, for which client metrics can be filtered."]
-    #[serde(rename = "errorFiltersValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorFiltersValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_filters_values: Vec<String>,
 }
 impl Filters {
@@ -269,7 +296,12 @@ pub struct InputTestArtifacts {
     #[serde(rename = "inputArtifactsZipFileurl", default, skip_serializing_if = "Option::is_none")]
     pub input_artifacts_zip_fileurl: Option<FileUrl>,
     #[doc = "The input artifacts file { name : url } map for the test run."]
-    #[serde(rename = "additionalUrls", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "additionalUrls",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub additional_urls: Vec<FileUrl>,
 }
 impl InputTestArtifacts {
@@ -474,7 +506,11 @@ impl ServerMetricsModel {
 #[doc = "Supported azure resource types for App Component like Microsoft.LoadTestService/loadtests, Microsoft.ClassicCompute, Microsoft.ClassicStorage etc. (Refer for full list of available resource types in azure : https://docs.microsoft.com/en-us/azure/azure-resource-manager/management/resource-providers-and-types, some of them we are supporting for server side metrics configuration)."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SupportedResourceType {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<String>,
 }
 impl SupportedResourceType {
diff --git a/services/svc/marketplacecatalog/src/package_2021_10_01/models.rs b/services/svc/marketplacecatalog/src/package_2021_10_01/models.rs
index be29a2521c..bd730922c0 100644
--- a/services/svc/marketplacecatalog/src/package_2021_10_01/models.rs
+++ b/services/svc/marketplacecatalog/src/package_2021_10_01/models.rs
@@ -35,7 +35,11 @@ pub enum ArtifactType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct AvailabilityEntity {
     #[doc = "List of allowed actions"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub actions: Vec<String>,
     #[doc = "Market for the availability collection"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -59,7 +63,11 @@ pub struct AvailabilityEntity {
     #[serde(rename = "pricingAudience")]
     pub pricing_audience: serde_json::Value,
     #[doc = "List of applicable terms"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub terms: Vec<Term>,
     #[doc = "Applicable billing meter information"]
     #[serde(rename = "piFilter", default, skip_serializing_if = "Option::is_none")]
@@ -71,7 +79,12 @@ pub struct AvailabilityEntity {
     #[serde(rename = "hasFreeTrials")]
     pub has_free_trials: bool,
     #[doc = "Asset behaviors"]
-    #[serde(rename = "assetBehaviors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assetBehaviors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub asset_behaviors: Vec<String>,
     #[doc = "Consumption unit type"]
     #[serde(rename = "consumptionUnitType", default, skip_serializing_if = "Option::is_none")]
@@ -86,7 +99,11 @@ pub struct AvailabilityEntity {
     #[serde(rename = "remediationRequired")]
     pub remediation_required: bool,
     #[doc = "Remediation actions for acquiring availability if RemediationRequired is true"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub remediations: Vec<Remediation>,
     #[doc = "Availability effectiveness start date - in epoch minutes"]
     #[serde(rename = "startDate", default, skip_serializing_if = "Option::is_none")]
@@ -95,7 +112,12 @@ pub struct AvailabilityEntity {
     #[serde(rename = "endDate", default, skip_serializing_if = "Option::is_none")]
     pub end_date: Option<i32>,
     #[doc = "Plan availabilities"]
-    #[serde(rename = "planAvailabilities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "planAvailabilities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plan_availabilities: Vec<AvailabilityEntity>,
 }
 impl AvailabilityEntity {
@@ -192,7 +214,12 @@ pub struct CatalogItem {
     #[serde(rename = "legacyId")]
     pub legacy_id: String,
     #[doc = "The list of the storefronts for which this offer is designated"]
-    #[serde(rename = "determinedStorefronts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "determinedStorefronts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub determined_storefronts: Vec<Store>,
     #[doc = "Summary"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -222,7 +249,11 @@ pub struct CatalogItem {
     #[serde(rename = "marketingMaterial", default, skip_serializing_if = "Option::is_none")]
     pub marketing_material: Option<serde_json::Value>,
     #[doc = "Markets for the item"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub markets: Vec<String>,
     #[doc = "ISV contact details"]
     #[serde(rename = "isvContactDetails", default, skip_serializing_if = "Option::is_none")]
@@ -258,34 +289,68 @@ pub struct CatalogItem {
     #[serde(rename = "uiDefinitionUri", default, skip_serializing_if = "Option::is_none")]
     pub ui_definition_uri: Option<String>,
     #[doc = "List of category IDs the marketplace item belongs to"]
-    #[serde(rename = "categoryIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "categoryIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub category_ids: Vec<String>,
     #[doc = "Market code of a service offer"]
     #[serde(rename = "marketCode", default, skip_serializing_if = "Option::is_none")]
     pub market_code: Option<String>,
     #[doc = "Market states of a service offer"]
-    #[serde(rename = "marketStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "marketStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub market_states: Vec<String>,
     #[doc = "List of industry IDs the item belongs to"]
-    #[serde(rename = "industryIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "industryIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub industry_ids: Vec<String>,
     #[doc = "List of cloud industry IDs the item belongs to"]
-    #[serde(rename = "cloudIndustryCategories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "cloudIndustryCategories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub cloud_industry_categories: Vec<String>,
     #[doc = "Primary product for the offer"]
     #[serde(rename = "primaryProduct", default, skip_serializing_if = "Option::is_none")]
     pub primary_product: Option<String>,
     #[doc = "It maps to the list of products the publisher provides with which their offer works"]
-    #[serde(rename = "supportedProducts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "supportedProducts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub supported_products: Vec<String>,
     #[doc = "Product categories the offer belongs to"]
-    #[serde(rename = "applicableProducts", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "applicableProducts",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applicable_products: Vec<String>,
     #[doc = "Service type that applies to the offer"]
     #[serde(rename = "serviceType", default, skip_serializing_if = "Option::is_none")]
     pub service_type: Option<String>,
     #[doc = "Competencies that apply to the offer"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub competencies: Vec<Competency>,
     #[doc = "A value indicating whether the item has prices"]
     #[serde(rename = "hasPrices", default, skip_serializing_if = "Option::is_none")]
@@ -294,40 +359,79 @@ pub struct CatalogItem {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub duration: Option<serde_json::Value>,
     #[doc = "The pricing details of each market to the item"]
-    #[serde(rename = "marketPricingDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "marketPricingDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub market_pricing_details: Vec<MarketPricingDetailsItem>,
     #[doc = "The pricing that applies to the item"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub pricing: Option<serde_json::Value>,
     #[doc = "The states that apply to the item"]
-    #[serde(rename = "solutionAreas", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "solutionAreas",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub solution_areas: Vec<String>,
     #[doc = "List of screenshot image URIs provided for the item"]
-    #[serde(rename = "screenshotUris", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "screenshotUris",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub screenshot_uris: Vec<String>,
     #[doc = "List of Links provided for the item"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub links: Vec<LinkProperties>,
     #[doc = "List of filters for the item"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filters: Vec<Filter>,
     #[doc = "Dictionary of icon image URIs by icon type"]
     #[serde(rename = "iconFileUris", default, skip_serializing_if = "Option::is_none")]
     pub icon_file_uris: Option<serde_json::Value>,
     #[doc = "List of artifacts"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<Artifact>,
     #[doc = "Custom item metadata"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub metadata: Option<serde_json::Value>,
     #[doc = "List of Images"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub images: Vec<ImageGroup>,
     #[doc = "List of product videos"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub videos: Vec<ProductVideo>,
     #[doc = "Plans available for the offer details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plans: Vec<Plan>,
     #[doc = "Resource group name the gallery item belongs to"]
     #[serde(rename = "resourceGroupName", default, skip_serializing_if = "Option::is_none")]
@@ -348,10 +452,19 @@ pub struct CatalogItem {
     #[serde(rename = "groupId", default, skip_serializing_if = "Option::is_none")]
     pub group_id: Option<String>,
     #[doc = "List of hide keys provided for the item"]
-    #[serde(rename = "hideKeys", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hideKeys",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hide_keys: Vec<String>,
     #[doc = "List of keywords provided for the item"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keywords: Vec<String>,
     #[doc = "Popularity of the product"]
     pub popularity: f64,
@@ -401,13 +514,23 @@ pub struct CatalogItem {
     #[serde(rename = "productOwnershipSellingMotion", default, skip_serializing_if = "Option::is_none")]
     pub product_ownership_selling_motion: Option<String>,
     #[doc = "The list of document links provided for the item"]
-    #[serde(rename = "documentLinks", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "documentLinks",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub document_links: Vec<LinkProperties>,
     #[doc = "A value indicating offer's environment"]
     #[serde(rename = "offerEnvironment")]
     pub offer_environment: serde_json::Value,
     #[doc = "List of linked Add Ins provided for the item"]
-    #[serde(rename = "linkedAddIns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "linkedAddIns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub linked_add_ins: Vec<String>,
     #[doc = "A value indicating whether the offer should not be re-ingest during bootstrap session"]
     #[serde(rename = "excludeFromBootstrap")]
@@ -437,7 +560,12 @@ pub struct CatalogItem {
     #[serde(rename = "licenseModel", default, skip_serializing_if = "Option::is_none")]
     pub license_model: Option<String>,
     #[doc = "PBI service principals"]
-    #[serde(rename = "pbiServicePrincipalIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pbiServicePrincipalIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub pbi_service_principal_ids: Vec<String>,
     #[doc = "Set to true only for offers of OfferType.VirtualMachine to indicate that it was originally of OfferType.CoreVirtualMachine"]
     #[serde(rename = "isCoreVm", default, skip_serializing_if = "Option::is_none")]
@@ -698,7 +826,11 @@ pub struct ImageGroup {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub context: Option<String>,
     #[doc = "List of images"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<Image>,
 }
 impl ImageGroup {
@@ -795,7 +927,12 @@ pub struct MarketPricingDetailsItem {
     #[serde(rename = "marketCode", default, skip_serializing_if = "Option::is_none")]
     pub market_code: Option<String>,
     #[doc = "Market states of a service offer"]
-    #[serde(rename = "marketStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "marketStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub market_states: Vec<String>,
 }
 impl MarketPricingDetailsItem {
@@ -835,7 +972,12 @@ pub struct Meter {
     #[serde(rename = "type", default, skip_serializing_if = "Option::is_none")]
     pub type_: Option<String>,
     #[doc = "Included quantity properties"]
-    #[serde(rename = "includedQuantityProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedQuantityProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_quantity_properties: Vec<IncludedQuantityProperty>,
 }
 impl Meter {
@@ -918,10 +1060,20 @@ impl OperatingSystem {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PiFilter {
     #[doc = "List of exclusion properties"]
-    #[serde(rename = "exclusionProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "exclusionProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclusion_properties: Vec<String>,
     #[doc = "List of inclusion properties"]
-    #[serde(rename = "inclusionProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "inclusionProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub inclusion_properties: Vec<String>,
 }
 impl PiFilter {
@@ -933,7 +1085,11 @@ impl PiFilter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PageResultOfCatalogItem {
     #[doc = "Gets the collection of entities for this feed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<CatalogItem>,
     #[doc = "Gets the link for the next page of items in the feed."]
     #[serde(rename = "nextPageLink", default, skip_serializing_if = "Option::is_none")]
@@ -974,7 +1130,11 @@ pub struct Plan {
     #[serde(rename = "legacyPlanId", default, skip_serializing_if = "Option::is_none")]
     pub legacy_plan_id: Option<String>,
     #[doc = "List of keywords"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub keywords: Vec<String>,
     #[doc = "Offer type"]
     #[serde(rename = "type")]
@@ -986,13 +1146,27 @@ pub struct Plan {
     #[serde(rename = "testDrive", default, skip_serializing_if = "Option::is_none")]
     pub test_drive: Option<serde_json::Value>,
     #[doc = "List of availabilities for this plan"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub availabilities: Vec<AvailabilityEntity>,
     #[doc = "Category IDs for this plan"]
-    #[serde(rename = "categoryIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "categoryIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub category_ids: Vec<String>,
     #[doc = "Conversion paths for this plan"]
-    #[serde(rename = "conversionPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "conversionPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub conversion_paths: Vec<String>,
     #[doc = "Metadata for this plan"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1004,7 +1178,11 @@ pub struct Plan {
     #[serde(rename = "uiDefinitionUri", default, skip_serializing_if = "Option::is_none")]
     pub ui_definition_uri: Option<String>,
     #[doc = "Files related to the marketplace item"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub artifacts: Vec<Artifact>,
     #[doc = "Version of the marketplace item"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1198,7 +1376,12 @@ pub struct Pricing {
     #[serde(rename = "currencyCode", default, skip_serializing_if = "Option::is_none")]
     pub currency_code: Option<String>,
     #[doc = "Plan prices"]
-    #[serde(rename = "planPrices", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "planPrices",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub plan_prices: Vec<PlanPrice>,
 }
 impl Pricing {
@@ -1269,13 +1452,25 @@ impl Remediation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RestrictedAudience {
     #[doc = "Subscription based restricted audience"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub subscriptions: Vec<String>,
     #[doc = "Tenant based restricted audience"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tenants: Vec<String>,
     #[doc = "User based restricted audience"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub users: Vec<String>,
 }
 impl RestrictedAudience {
@@ -1305,7 +1500,12 @@ pub enum StoreFrontOptions {}
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct Term {
     #[doc = "Term description parameters"]
-    #[serde(rename = "termDescriptionParameters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "termDescriptionParameters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub term_description_parameters: Vec<TermDescriptionParameter>,
     #[doc = "Term id"]
     #[serde(rename = "termId", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/mixedreality/src/package_2021_01_01/models.rs b/services/svc/mixedreality/src/package_2021_01_01/models.rs
index 9f46f76d51..5878e5094e 100644
--- a/services/svc/mixedreality/src/package_2021_01_01/models.rs
+++ b/services/svc/mixedreality/src/package_2021_01_01/models.rs
@@ -226,7 +226,11 @@ pub struct Error {
     #[doc = "A human-readable representation of the error."]
     pub message: String,
     #[doc = "An array of details about specific errors that led to this reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<Error>,
     #[doc = "The target of the particular error (e.g., the name of the property in error)."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/monitor/src/package_2018_09_preview/models.rs b/services/svc/monitor/src/package_2018_09_preview/models.rs
index b84a7e6306..17eb3c97c5 100644
--- a/services/svc/monitor/src/package_2018_09_preview/models.rs
+++ b/services/svc/monitor/src/package_2018_09_preview/models.rs
@@ -34,7 +34,12 @@ pub struct AzureMetricsBaseData {
     #[doc = "Gets or sets the Metric namespace"]
     pub namespace: String,
     #[doc = "Gets or sets the list of dimension names (optional)"]
-    #[serde(rename = "dimNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dimNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dim_names: Vec<String>,
     #[doc = "Gets or sets the list of time series data for the metric (one per unique dimension combination)"]
     pub series: Vec<AzureTimeSeriesData>,
@@ -86,7 +91,12 @@ impl AzureMetricsResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct AzureTimeSeriesData {
     #[doc = "Gets or sets dimension values"]
-    #[serde(rename = "dimValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dimValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub dim_values: Vec<String>,
     #[doc = "Gets or sets Min value"]
     pub min: f64,
diff --git a/services/svc/operationalinsights/src/v1/models.rs b/services/svc/operationalinsights/src/v1/models.rs
index 4051680cfc..59f32658d7 100644
--- a/services/svc/operationalinsights/src/v1/models.rs
+++ b/services/svc/operationalinsights/src/v1/models.rs
@@ -31,7 +31,11 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     #[doc = "Indicates resources which were responsible for the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
     #[doc = "Additional properties that can be provided on the error details object"]
     #[serde(rename = "additionalProperties", default, skip_serializing_if = "Option::is_none")]
@@ -56,7 +60,11 @@ pub struct ErrorInfo {
     #[doc = "A human readable error message."]
     pub message: String,
     #[doc = "error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub innererror: Box<Option<ErrorInfo>>,
@@ -118,10 +126,18 @@ pub mod metadata_application {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The related tables for the Application Insights app."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
         #[doc = "The related functions for the Application Insights app."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
     }
     impl Related {
@@ -161,19 +177,40 @@ pub mod metadata_category {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The tables related to the category"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
         #[doc = "The functions related to the category"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
         #[doc = "The resource types related to the category"]
-        #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_types: Vec<String>,
         #[doc = "The saved queries related to the category"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries: Vec<String>,
         #[doc = "The Log Analytics solutions related to the category"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub solutions: Vec<String>,
     }
     impl Related {
@@ -231,19 +268,40 @@ pub mod metadata_function {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The related tables for the function."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
         #[doc = "The related Log Analytics solutions for the function."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub solutions: Vec<String>,
         #[doc = "The related resource types for the function."]
-        #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_types: Vec<String>,
         #[doc = "The related categories for the function."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub categories: Vec<String>,
         #[doc = "The related workspaces for the function."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub workspaces: Vec<String>,
     }
     impl Related {
@@ -258,10 +316,18 @@ pub struct MetadataPermissions {
     #[doc = "The permission indication for the workspaces on the metadata request."]
     pub workspaces: Vec<serde_json::Value>,
     #[doc = "The permission indication for the Azure resources on the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<serde_json::Value>,
     #[doc = "The permission indication for the Application Insights apps on the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applications: Vec<serde_json::Value>,
 }
 impl MetadataPermissions {
@@ -287,7 +353,11 @@ pub struct MetadataQuery {
     #[doc = "The KQL body of the query."]
     pub body: String,
     #[doc = "The user defined labels associated with the query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "String-based key-value tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -319,16 +389,33 @@ pub mod metadata_query {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The related categories for the query."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub categories: Vec<String>,
         #[doc = "The related Log Analytics solutions for the query."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub solutions: Vec<String>,
         #[doc = "The related resource types for the query."]
-        #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_types: Vec<String>,
         #[doc = "The related tables for the query."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
     }
     impl Related {
@@ -360,7 +447,11 @@ pub struct MetadataResourceType {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The user-defined labels of the resource-type"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "String-based key-value tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -392,22 +483,46 @@ pub mod metadata_resource_type {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The tables related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
         #[doc = "The functions related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
         #[doc = "The categories related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub categories: Vec<String>,
         #[doc = "The queries related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries: Vec<String>,
         #[doc = "The Log Analytics workspaces related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub workspaces: Vec<String>,
         #[doc = "The Azure resources related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resources: Vec<String>,
     }
     impl Related {
@@ -420,34 +535,75 @@ pub mod metadata_resource_type {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetadataResults {
     #[doc = "The list of categories that are referenced in this metadata response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub categories: Vec<MetadataCategory>,
     #[doc = "The list of resource types that are referenced in this metadata response."]
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<MetadataResourceType>,
     #[doc = "The list of Log Analytics solutions installed on the workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub solutions: Vec<MetadataSolution>,
     #[doc = "The list of tables and columns that comprise the schema of the workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<MetadataTable>,
     #[doc = "The list of functions stored on the workspace, or introduced by solutions etc."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub functions: Vec<MetadataFunction>,
     #[doc = "The list of saved queries stored on the workspace, or introduced by solutions, resource types, etc."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub queries: Vec<MetadataQuery>,
     #[doc = "The list of Application Insights apps that were referenced in the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applications: Vec<MetadataApplication>,
     #[doc = "The list of Log Analytics workspaces that were referenced in the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub workspaces: Vec<MetadataWorkspace>,
     #[doc = "The list of Azure resources that were referenced in the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<MetadataResource>,
     #[doc = "The list of permission rules that affected the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<MetadataPermissions>,
 }
 impl MetadataResults {
@@ -498,16 +654,32 @@ pub mod metadata_solution {
         #[doc = "The tables related to the Log Analytics solution"]
         pub tables: Vec<String>,
         #[doc = "The functions related to the Log Analytics solution"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
         #[doc = "The categories related to the Log Analytics solution"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub categories: Vec<String>,
         #[doc = "The saved queries related to the Log Analytics solution"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries: Vec<String>,
         #[doc = "The Workspaces referenced in the metadata request that are related to the Log Analytics solution"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub workspaces: Vec<String>,
     }
     impl Related {
@@ -536,7 +708,11 @@ pub struct MetadataTable {
     #[serde(rename = "timespanColumn", default, skip_serializing_if = "Option::is_none")]
     pub timespan_column: Option<String>,
     #[doc = "The user defined labels of the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "String-based key-value tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -545,7 +721,11 @@ pub struct MetadataTable {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<serde_json::Value>,
     #[doc = "The list of columns defined on the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<serde_json::Value>,
     #[doc = "The related metadata items for the table"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -572,22 +752,47 @@ pub mod metadata_table {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The related categories for the table"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub categories: Vec<String>,
         #[doc = "The related Log Analytics solutions for the table"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub solutions: Vec<String>,
         #[doc = "The related resource types for the table"]
-        #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_types: Vec<String>,
         #[doc = "The related Log Analytics workspaces for the table"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub workspaces: Vec<String>,
         #[doc = "The related functions for the table"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
         #[doc = "The related saved queries for the table"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries: Vec<String>,
     }
     impl Related {
@@ -629,19 +834,40 @@ pub mod metadata_workspace {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The related tables for the Log Analytics workspace."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
         #[doc = "The related Log Analytics solutions for the Log Analytics workspace."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub solutions: Vec<String>,
         #[doc = "The related resource types for the Log Analytics workspace."]
-        #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_types: Vec<String>,
         #[doc = "The related functions for the Log Analytics workspace."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
         #[doc = "The related Azure resources for the Log Analytics workspace."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resources: Vec<String>,
     }
     impl Related {
diff --git a/services/svc/operationalinsights/src/v20171001/models.rs b/services/svc/operationalinsights/src/v20171001/models.rs
index d0b2d411a9..4108a3eb33 100644
--- a/services/svc/operationalinsights/src/v20171001/models.rs
+++ b/services/svc/operationalinsights/src/v20171001/models.rs
@@ -31,7 +31,11 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     #[doc = "Indicates resources which were responsible for the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
     #[doc = "Additional properties that can be provided on the error details object"]
     #[serde(rename = "additionalProperties", default, skip_serializing_if = "Option::is_none")]
@@ -56,7 +60,11 @@ pub struct ErrorInfo {
     #[doc = "A human readable error message."]
     pub message: String,
     #[doc = "error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub innererror: Box<Option<ErrorInfo>>,
@@ -118,10 +126,18 @@ pub mod metadata_application {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The related tables for the Application Insights app."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
         #[doc = "The related functions for the Application Insights app."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
     }
     impl Related {
@@ -161,19 +177,40 @@ pub mod metadata_category {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The tables related to the category"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
         #[doc = "The functions related to the category"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
         #[doc = "The resource types related to the category"]
-        #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_types: Vec<String>,
         #[doc = "The saved queries related to the category"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries: Vec<String>,
         #[doc = "The Log Analytics solutions related to the category"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub solutions: Vec<String>,
     }
     impl Related {
@@ -231,19 +268,40 @@ pub mod metadata_function {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The related tables for the function."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
         #[doc = "The related Log Analytics solutions for the function."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub solutions: Vec<String>,
         #[doc = "The related resource types for the function."]
-        #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_types: Vec<String>,
         #[doc = "The related categories for the function."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub categories: Vec<String>,
         #[doc = "The related workspaces for the function."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub workspaces: Vec<String>,
     }
     impl Related {
@@ -258,10 +316,18 @@ pub struct MetadataPermissions {
     #[doc = "The permission indication for the workspaces on the metadata request."]
     pub workspaces: Vec<serde_json::Value>,
     #[doc = "The permission indication for the Azure resources on the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<serde_json::Value>,
     #[doc = "The permission indication for the Application Insights apps on the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applications: Vec<serde_json::Value>,
 }
 impl MetadataPermissions {
@@ -287,7 +353,11 @@ pub struct MetadataQuery {
     #[doc = "The KQL body of the query."]
     pub body: String,
     #[doc = "The user defined labels associated with the query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "String-based key-value tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -319,16 +389,33 @@ pub mod metadata_query {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The related categories for the query."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub categories: Vec<String>,
         #[doc = "The related Log Analytics solutions for the query."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub solutions: Vec<String>,
         #[doc = "The related resource types for the query."]
-        #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_types: Vec<String>,
         #[doc = "The related tables for the query."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
     }
     impl Related {
@@ -360,7 +447,11 @@ pub struct MetadataResourceType {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The user-defined labels of the resource-type"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "String-based key-value tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -392,22 +483,46 @@ pub mod metadata_resource_type {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The tables related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
         #[doc = "The functions related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
         #[doc = "The categories related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub categories: Vec<String>,
         #[doc = "The queries related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries: Vec<String>,
         #[doc = "The Log Analytics workspaces related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub workspaces: Vec<String>,
         #[doc = "The Azure resources related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resources: Vec<String>,
     }
     impl Related {
@@ -420,34 +535,75 @@ pub mod metadata_resource_type {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetadataResults {
     #[doc = "The list of categories that are referenced in this metadata response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub categories: Vec<MetadataCategory>,
     #[doc = "The list of resource types that are referenced in this metadata response."]
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<MetadataResourceType>,
     #[doc = "The list of Log Analytics solutions installed on the workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub solutions: Vec<MetadataSolution>,
     #[doc = "The list of tables and columns that comprise the schema of the workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<MetadataTable>,
     #[doc = "The list of functions stored on the workspace, or introduced by solutions etc."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub functions: Vec<MetadataFunction>,
     #[doc = "The list of saved queries stored on the workspace, or introduced by solutions, resource types, etc."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub queries: Vec<MetadataQuery>,
     #[doc = "The list of Application Insights apps that were referenced in the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applications: Vec<MetadataApplication>,
     #[doc = "The list of Log Analytics workspaces that were referenced in the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub workspaces: Vec<MetadataWorkspace>,
     #[doc = "The list of Azure resources that were referenced in the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<MetadataResource>,
     #[doc = "The list of permission rules that affected the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<MetadataPermissions>,
 }
 impl MetadataResults {
@@ -498,16 +654,32 @@ pub mod metadata_solution {
         #[doc = "The tables related to the Log Analytics solution"]
         pub tables: Vec<String>,
         #[doc = "The functions related to the Log Analytics solution"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
         #[doc = "The categories related to the Log Analytics solution"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub categories: Vec<String>,
         #[doc = "The saved queries related to the Log Analytics solution"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries: Vec<String>,
         #[doc = "The Workspaces referenced in the metadata request that are related to the Log Analytics solution"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub workspaces: Vec<String>,
     }
     impl Related {
@@ -536,7 +708,11 @@ pub struct MetadataTable {
     #[serde(rename = "timespanColumn", default, skip_serializing_if = "Option::is_none")]
     pub timespan_column: Option<String>,
     #[doc = "The user defined labels of the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "String-based key-value tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -545,7 +721,11 @@ pub struct MetadataTable {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<serde_json::Value>,
     #[doc = "The list of columns defined on the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<serde_json::Value>,
     #[doc = "The related metadata items for the table"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -572,22 +752,47 @@ pub mod metadata_table {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The related categories for the table"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub categories: Vec<String>,
         #[doc = "The related Log Analytics solutions for the table"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub solutions: Vec<String>,
         #[doc = "The related resource types for the table"]
-        #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_types: Vec<String>,
         #[doc = "The related Log Analytics workspaces for the table"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub workspaces: Vec<String>,
         #[doc = "The related functions for the table"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
         #[doc = "The related saved queries for the table"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries: Vec<String>,
     }
     impl Related {
@@ -629,19 +834,40 @@ pub mod metadata_workspace {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The related tables for the Log Analytics workspace."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
         #[doc = "The related Log Analytics solutions for the Log Analytics workspace."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub solutions: Vec<String>,
         #[doc = "The related resource types for the Log Analytics workspace."]
-        #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_types: Vec<String>,
         #[doc = "The related functions for the Log Analytics workspace."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
         #[doc = "The related Azure resources for the Log Analytics workspace."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resources: Vec<String>,
     }
     impl Related {
diff --git a/services/svc/operationalinsights/src/v20210519/models.rs b/services/svc/operationalinsights/src/v20210519/models.rs
index 7cf9df5183..da0f5222f8 100644
--- a/services/svc/operationalinsights/src/v20210519/models.rs
+++ b/services/svc/operationalinsights/src/v20210519/models.rs
@@ -65,7 +65,11 @@ impl BatchQueryResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BatchQueryResults {
     #[doc = "The list of tables, columns and rows."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<Table>,
     #[doc = "Statistics represented in JSON format."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -96,7 +100,11 @@ impl BatchRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BatchResponse {
     #[doc = "An array of responses corresponding to each individual request in a batch."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub responses: Vec<BatchQueryResponse>,
 }
 impl BatchResponse {
@@ -132,7 +140,11 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     #[doc = "Indicates resources which were responsible for the error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
     #[doc = "Additional properties that can be provided on the error details object"]
     #[serde(rename = "additionalProperties", default, skip_serializing_if = "Option::is_none")]
@@ -157,7 +169,11 @@ pub struct ErrorInfo {
     #[doc = "A human readable error message."]
     pub message: String,
     #[doc = "error details."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub innererror: Box<Option<ErrorInfo>>,
@@ -282,10 +298,18 @@ pub mod metadata_application {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The related tables for the Application Insights app."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
         #[doc = "The related functions for the Application Insights app."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
     }
     impl Related {
@@ -325,19 +349,40 @@ pub mod metadata_category {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The tables related to the category"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
         #[doc = "The functions related to the category"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
         #[doc = "The resource types related to the category"]
-        #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_types: Vec<String>,
         #[doc = "The saved queries related to the category"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries: Vec<String>,
         #[doc = "The Log Analytics solutions related to the category"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub solutions: Vec<String>,
     }
     impl Related {
@@ -395,19 +440,40 @@ pub mod metadata_function {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The related tables for the function."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
         #[doc = "The related Log Analytics solutions for the function."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub solutions: Vec<String>,
         #[doc = "The related resource types for the function."]
-        #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_types: Vec<String>,
         #[doc = "The related categories for the function."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub categories: Vec<String>,
         #[doc = "The related workspaces for the function."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub workspaces: Vec<String>,
     }
     impl Related {
@@ -422,10 +488,18 @@ pub struct MetadataPermissions {
     #[doc = "The permission indication for the workspaces on the metadata request."]
     pub workspaces: Vec<serde_json::Value>,
     #[doc = "The permission indication for the Azure resources on the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<serde_json::Value>,
     #[doc = "The permission indication for the Application Insights apps on the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applications: Vec<serde_json::Value>,
 }
 impl MetadataPermissions {
@@ -451,7 +525,11 @@ pub struct MetadataQuery {
     #[doc = "The KQL body of the query."]
     pub body: String,
     #[doc = "The user defined labels associated with the query."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "String-based key-value tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -483,16 +561,33 @@ pub mod metadata_query {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The related categories for the query."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub categories: Vec<String>,
         #[doc = "The related Log Analytics solutions for the query."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub solutions: Vec<String>,
         #[doc = "The related resource types for the query."]
-        #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_types: Vec<String>,
         #[doc = "The related tables for the query."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
     }
     impl Related {
@@ -524,7 +619,11 @@ pub struct MetadataResourceType {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The user-defined labels of the resource-type"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "String-based key-value tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -556,22 +655,46 @@ pub mod metadata_resource_type {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The tables related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
         #[doc = "The functions related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
         #[doc = "The categories related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub categories: Vec<String>,
         #[doc = "The queries related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries: Vec<String>,
         #[doc = "The Log Analytics workspaces related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub workspaces: Vec<String>,
         #[doc = "The Azure resources related to the resource-type"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resources: Vec<String>,
     }
     impl Related {
@@ -584,34 +707,75 @@ pub mod metadata_resource_type {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MetadataResults {
     #[doc = "The list of categories that are referenced in this metadata response."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub categories: Vec<MetadataCategory>,
     #[doc = "The list of resource types that are referenced in this metadata response."]
-    #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "resourceTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resource_types: Vec<MetadataResourceType>,
     #[doc = "The list of Log Analytics solutions installed on the workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub solutions: Vec<MetadataSolution>,
     #[doc = "The list of tables and columns that comprise the schema of the workspace."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tables: Vec<MetadataTable>,
     #[doc = "The list of functions stored on the workspace, or introduced by solutions etc."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub functions: Vec<MetadataFunction>,
     #[doc = "The list of saved queries stored on the workspace, or introduced by solutions, resource types, etc."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub queries: Vec<MetadataQuery>,
     #[doc = "The list of Application Insights apps that were referenced in the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub applications: Vec<MetadataApplication>,
     #[doc = "The list of Log Analytics workspaces that were referenced in the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub workspaces: Vec<MetadataWorkspace>,
     #[doc = "The list of Azure resources that were referenced in the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<MetadataResource>,
     #[doc = "The list of permission rules that affected the metadata request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub permissions: Vec<MetadataPermissions>,
 }
 impl MetadataResults {
@@ -662,16 +826,32 @@ pub mod metadata_solution {
         #[doc = "The tables related to the Log Analytics solution"]
         pub tables: Vec<String>,
         #[doc = "The functions related to the Log Analytics solution"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
         #[doc = "The categories related to the Log Analytics solution"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub categories: Vec<String>,
         #[doc = "The saved queries related to the Log Analytics solution"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries: Vec<String>,
         #[doc = "The Workspaces referenced in the metadata request that are related to the Log Analytics solution"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub workspaces: Vec<String>,
     }
     impl Related {
@@ -700,7 +880,11 @@ pub struct MetadataTable {
     #[serde(rename = "timespanColumn", default, skip_serializing_if = "Option::is_none")]
     pub timespan_column: Option<String>,
     #[doc = "The user defined labels of the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "String-based key-value tags"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -709,7 +893,11 @@ pub struct MetadataTable {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub properties: Option<serde_json::Value>,
     #[doc = "The list of columns defined on the table"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub columns: Vec<serde_json::Value>,
     #[doc = "The related metadata items for the table"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -736,22 +924,47 @@ pub mod metadata_table {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The related categories for the table"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub categories: Vec<String>,
         #[doc = "The related Log Analytics solutions for the table"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub solutions: Vec<String>,
         #[doc = "The related resource types for the table"]
-        #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_types: Vec<String>,
         #[doc = "The related Log Analytics workspaces for the table"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub workspaces: Vec<String>,
         #[doc = "The related functions for the table"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
         #[doc = "The related saved queries for the table"]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub queries: Vec<String>,
     }
     impl Related {
@@ -793,19 +1006,40 @@ pub mod metadata_workspace {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Related {
         #[doc = "The related tables for the Log Analytics workspace."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub tables: Vec<String>,
         #[doc = "The related Log Analytics solutions for the Log Analytics workspace."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub solutions: Vec<String>,
         #[doc = "The related resource types for the Log Analytics workspace."]
-        #[serde(rename = "resourceTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "resourceTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resource_types: Vec<String>,
         #[doc = "The related functions for the Log Analytics workspace."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub functions: Vec<String>,
         #[doc = "The related Azure resources for the Log Analytics workspace."]
-        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub resources: Vec<String>,
     }
     impl Related {
diff --git a/services/svc/purview/src/package_2021_07_01_preview/models.rs b/services/svc/purview/src/package_2021_07_01_preview/models.rs
index d14d27de69..761c1b6a78 100644
--- a/services/svc/purview/src/package_2021_07_01_preview/models.rs
+++ b/services/svc/purview/src/package_2021_07_01_preview/models.rs
@@ -13,13 +13,23 @@ pub struct AttributeMatcher {
     #[serde(rename = "attributeValueIncludes", default, skip_serializing_if = "Option::is_none")]
     pub attribute_value_includes: Option<String>,
     #[doc = "List of values for attribute"]
-    #[serde(rename = "attributeValueIncludedIn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "attributeValueIncludedIn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub attribute_value_included_in: Vec<String>,
     #[doc = "Value excluded for attribute"]
     #[serde(rename = "attributeValueExcludes", default, skip_serializing_if = "Option::is_none")]
     pub attribute_value_excludes: Option<String>,
     #[doc = "List of values excluded for attribute"]
-    #[serde(rename = "attributeValueExcludedIn", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "attributeValueExcludedIn",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub attribute_value_excluded_in: Vec<String>,
 }
 impl AttributeMatcher {
@@ -209,7 +219,11 @@ pub struct ErrorModel {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "The error details"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorModel>,
 }
 impl ErrorModel {
@@ -282,10 +296,20 @@ pub struct MetadataPolicyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "The DecisionRules of policy"]
-    #[serde(rename = "decisionRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "decisionRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub decision_rules: Vec<DecisionRule>,
     #[doc = "The AttributeRules of policy"]
-    #[serde(rename = "attributeRules", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "attributeRules",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub attribute_rules: Vec<AttributeRule>,
     #[doc = "The collection reference for a policy"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/purview/src/package_2021_09_01_preview/models.rs b/services/svc/purview/src/package_2021_09_01_preview/models.rs
index ad619bddf1..3b53f88a92 100644
--- a/services/svc/purview/src/package_2021_09_01_preview/models.rs
+++ b/services/svc/purview/src/package_2021_09_01_preview/models.rs
@@ -162,7 +162,12 @@ pub struct AdlsGen2AccountReceivedAssetProperties {
     #[serde(rename = "receiverAssetName", default, skip_serializing_if = "Option::is_none")]
     pub receiver_asset_name: Option<String>,
     #[doc = "Paths from adls gen2 account made available for the share."]
-    #[serde(rename = "receiverPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "receiverPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub receiver_paths: Vec<String>,
 }
 impl AdlsGen2AccountReceivedAssetProperties {
@@ -639,7 +644,12 @@ pub struct BlobAccountReceivedAssetProperties {
     #[serde(rename = "receiverAssetName", default, skip_serializing_if = "Option::is_none")]
     pub receiver_asset_name: Option<String>,
     #[doc = "Paths from blob account made available for the share."]
-    #[serde(rename = "receiverPaths", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "receiverPaths",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub receiver_paths: Vec<String>,
 }
 impl BlobAccountReceivedAssetProperties {
@@ -1015,7 +1025,11 @@ pub struct PurviewShareErrorInfo {
     #[doc = "Code of the error"]
     pub code: String,
     #[doc = "Nested details of the error model"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<PurviewShareErrorInfo>,
     #[doc = "Message of the error"]
     pub message: String,
diff --git a/services/svc/purview/src/package_2021_10_01_preview/models.rs b/services/svc/purview/src/package_2021_10_01_preview/models.rs
index d2a795551f..f15e9d3c43 100644
--- a/services/svc/purview/src/package_2021_10_01_preview/models.rs
+++ b/services/svc/purview/src/package_2021_10_01_preview/models.rs
@@ -1018,7 +1018,11 @@ impl AzureKeyVault {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureKeyVaultList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureKeyVault>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -2235,7 +2239,11 @@ pub mod classification_rule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClassificationRuleList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClassificationRule>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -2402,9 +2410,19 @@ pub struct CustomClassificationRuleProperties {
     pub minimum_percentage_match: Option<f64>,
     #[serde(rename = "classificationAction", default, skip_serializing_if = "Option::is_none")]
     pub classification_action: Option<custom_classification_rule_properties::ClassificationAction>,
-    #[serde(rename = "dataPatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataPatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_patterns: Vec<ClassificationRulePattern>,
-    #[serde(rename = "columnPatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "columnPatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub column_patterns: Vec<ClassificationRulePattern>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
@@ -2662,7 +2680,11 @@ pub struct DataSource {
     #[serde(flatten)]
     pub proxy_resource: ProxyResource,
     pub kind: data_source::Kind,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scans: Vec<Scan>,
 }
 impl DataSource {
@@ -2766,7 +2788,11 @@ pub mod data_source {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataSourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataSource>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -2806,7 +2832,11 @@ pub struct ErrorInfo {
     pub message: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorInfo>,
 }
 impl ErrorInfo {
@@ -2822,7 +2852,11 @@ pub struct ErrorModel {
     pub message: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorModel>,
 }
 impl ErrorModel {
@@ -2937,9 +2971,19 @@ impl Filter {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FilterProperties {
-    #[serde(rename = "excludeUriPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludeUriPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude_uri_prefixes: Vec<String>,
-    #[serde(rename = "includeUriPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includeUriPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub include_uri_prefixes: Vec<String>,
 }
 impl FilterProperties {
@@ -3308,15 +3352,38 @@ impl ProxyResource {
 pub struct RecurrenceSchedule {
     #[serde(rename = "additionalProperties", default, skip_serializing_if = "Option::is_none")]
     pub additional_properties: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minutes: Vec<i32>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hours: Vec<i32>,
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<String>,
-    #[serde(rename = "monthDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub month_days: Vec<i32>,
-    #[serde(rename = "monthlyOccurrences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthlyOccurrences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monthly_occurrences: Vec<RecurrenceScheduleOccurrence>,
 }
 impl RecurrenceSchedule {
@@ -3404,11 +3471,25 @@ impl RegexClassificationRulePattern {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceNameFilter {
-    #[serde(rename = "excludePrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludePrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude_prefixes: Vec<String>,
-    #[serde(rename = "includePrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includePrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub include_prefixes: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
 }
 impl ResourceNameFilter {
@@ -3730,7 +3811,12 @@ pub struct Scan {
     #[serde(flatten)]
     pub proxy_resource: ProxyResource,
     pub kind: scan::Kind,
-    #[serde(rename = "scanResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scanResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scan_results: Vec<ScanResult>,
 }
 impl Scan {
@@ -3877,7 +3963,11 @@ pub mod scan {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScanDiagnostics {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notifications: Vec<Notification>,
     #[serde(rename = "exceptionCountMap", default, skip_serializing_if = "Option::is_none")]
     pub exception_count_map: Option<serde_json::Value>,
@@ -3889,7 +3979,11 @@ impl ScanDiagnostics {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScanHistoryList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScanResult>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -3909,7 +4003,11 @@ impl ScanHistoryList {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScanList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Scan>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -4300,7 +4398,11 @@ pub mod scan_ruleset {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScanRulesetList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScanRuleset>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -4324,9 +4426,19 @@ pub struct ScanRulesetProperties {
     pub created_at: Option<time::OffsetDateTime>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
-    #[serde(rename = "excludedSystemClassifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedSystemClassifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_system_classifications: Vec<String>,
-    #[serde(rename = "includedCustomClassificationRuleNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedCustomClassificationRuleNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_custom_classification_rule_names: Vec<String>,
     #[serde(rename = "lastModifiedAt", default, with = "azure_core::date::rfc3339::option")]
     pub last_modified_at: Option<time::OffsetDateTime>,
@@ -4338,9 +4450,19 @@ impl ScanRulesetProperties {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScanningRule {
-    #[serde(rename = "fileExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fileExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_extensions: Vec<String>,
-    #[serde(rename = "customFileExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customFileExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_file_extensions: Vec<CustomFileExtension>,
 }
 impl ScanningRule {
@@ -4629,7 +4751,11 @@ pub mod system_scan_ruleset {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SystemScanRulesetList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SystemScanRuleset>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
diff --git a/services/svc/purview/src/package_2022_02_01_preview/models.rs b/services/svc/purview/src/package_2022_02_01_preview/models.rs
index b322ed91d1..dbf29bd34b 100644
--- a/services/svc/purview/src/package_2022_02_01_preview/models.rs
+++ b/services/svc/purview/src/package_2022_02_01_preview/models.rs
@@ -1046,7 +1046,11 @@ impl AzureKeyVault {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AzureKeyVaultList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AzureKeyVault>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -2279,7 +2283,11 @@ pub mod classification_rule {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClassificationRuleList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ClassificationRule>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -2465,7 +2473,11 @@ pub mod credential {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct CredentialList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Credential>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -2568,9 +2580,19 @@ pub struct CustomClassificationRuleProperties {
     pub minimum_percentage_match: Option<f64>,
     #[serde(rename = "classificationAction", default, skip_serializing_if = "Option::is_none")]
     pub classification_action: Option<custom_classification_rule_properties::ClassificationAction>,
-    #[serde(rename = "dataPatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "dataPatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub data_patterns: Vec<ClassificationRulePattern>,
-    #[serde(rename = "columnPatterns", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "columnPatterns",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub column_patterns: Vec<ClassificationRulePattern>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
@@ -2828,7 +2850,11 @@ pub struct DataSource {
     #[serde(flatten)]
     pub proxy_resource: ProxyResource,
     pub kind: data_source::Kind,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scans: Vec<Scan>,
 }
 impl DataSource {
@@ -2932,7 +2958,11 @@ pub mod data_source {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DataSourceList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DataSource>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -3000,7 +3030,11 @@ pub struct ErrorInfo {
     pub message: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorInfo>,
 }
 impl ErrorInfo {
@@ -3016,7 +3050,11 @@ pub struct ErrorModel {
     pub message: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorModel>,
 }
 impl ErrorModel {
@@ -3131,9 +3169,19 @@ impl Filter {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FilterProperties {
-    #[serde(rename = "excludeUriPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludeUriPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude_uri_prefixes: Vec<String>,
-    #[serde(rename = "includeUriPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includeUriPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub include_uri_prefixes: Vec<String>,
 }
 impl FilterProperties {
@@ -3626,15 +3674,38 @@ impl ProxyResource {
 pub struct RecurrenceSchedule {
     #[serde(rename = "additionalProperties", default, skip_serializing_if = "Option::is_none")]
     pub additional_properties: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub minutes: Vec<i32>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hours: Vec<i32>,
-    #[serde(rename = "weekDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "weekDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub week_days: Vec<String>,
-    #[serde(rename = "monthDays", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthDays",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub month_days: Vec<i32>,
-    #[serde(rename = "monthlyOccurrences", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "monthlyOccurrences",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub monthly_occurrences: Vec<RecurrenceScheduleOccurrence>,
 }
 impl RecurrenceSchedule {
@@ -3722,11 +3793,25 @@ impl RegexClassificationRulePattern {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ResourceNameFilter {
-    #[serde(rename = "excludePrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludePrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub exclude_prefixes: Vec<String>,
-    #[serde(rename = "includePrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includePrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub include_prefixes: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<String>,
 }
 impl ResourceNameFilter {
@@ -4086,7 +4171,12 @@ pub struct Scan {
     #[serde(flatten)]
     pub proxy_resource: ProxyResource,
     pub kind: scan::Kind,
-    #[serde(rename = "scanResults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "scanResults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scan_results: Vec<ScanResult>,
 }
 impl Scan {
@@ -4233,7 +4323,11 @@ pub mod scan {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScanDiagnostics {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub notifications: Vec<Notification>,
     #[serde(rename = "exceptionCountMap", default, skip_serializing_if = "Option::is_none")]
     pub exception_count_map: Option<serde_json::Value>,
@@ -4245,7 +4339,11 @@ impl ScanDiagnostics {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScanHistoryList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScanResult>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -4265,7 +4363,11 @@ impl ScanHistoryList {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScanList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Scan>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -4656,7 +4758,11 @@ pub mod scan_ruleset {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScanRulesetList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ScanRuleset>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
@@ -4680,9 +4786,19 @@ pub struct ScanRulesetProperties {
     pub created_at: Option<time::OffsetDateTime>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
-    #[serde(rename = "excludedSystemClassifications", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "excludedSystemClassifications",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub excluded_system_classifications: Vec<String>,
-    #[serde(rename = "includedCustomClassificationRuleNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "includedCustomClassificationRuleNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub included_custom_classification_rule_names: Vec<String>,
     #[serde(rename = "lastModifiedAt", default, with = "azure_core::date::rfc3339::option")]
     pub last_modified_at: Option<time::OffsetDateTime>,
@@ -4694,9 +4810,19 @@ impl ScanRulesetProperties {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ScanningRule {
-    #[serde(rename = "fileExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fileExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_extensions: Vec<String>,
-    #[serde(rename = "customFileExtensions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "customFileExtensions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub custom_file_extensions: Vec<CustomFileExtension>,
 }
 impl ScanningRule {
@@ -5041,7 +5167,11 @@ pub mod system_scan_ruleset {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SystemScanRulesetList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SystemScanRuleset>,
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
     pub next_link: Option<String>,
diff --git a/services/svc/purview/src/package_preview_2022_03/models.rs b/services/svc/purview/src/package_preview_2022_03/models.rs
index a41925ebce..92a7d7e8f6 100644
--- a/services/svc/purview/src/package_preview_2022_03/models.rs
+++ b/services/svc/purview/src/package_preview_2022_03/models.rs
@@ -10,7 +10,11 @@ pub struct AtlasAttributeDef {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub cardinality: Option<Cardinality>,
     #[doc = "An array of constraints."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub constraints: Vec<AtlasConstraintDef>,
     #[doc = "The default value of the attribute."]
     #[serde(rename = "defaultValue", default, skip_serializing_if = "Option::is_none")]
@@ -140,7 +144,12 @@ pub struct AtlasClassification {
     #[serde(rename = "removePropagationsOnEntityDelete", default, skip_serializing_if = "Option::is_none")]
     pub remove_propagations_on_entity_delete: Option<bool>,
     #[doc = "An array of time boundaries indicating validity periods."]
-    #[serde(rename = "validityPeriods", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validityPeriods",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub validity_periods: Vec<TimeBoundary>,
     #[doc = "indicate the source who create the classification detail"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -160,13 +169,28 @@ pub struct AtlasClassificationDef {
     #[serde(flatten)]
     pub atlas_struct_def: AtlasStructDef,
     #[doc = "Specifying a list of entityType names in the classificationDef, ensures that classifications can\nonly be applied to those entityTypes.\n<ul>\n<li>Any subtypes of the entity types inherit the restriction</li>\n<li>Any classificationDef subtypes inherit the parents entityTypes restrictions</li>\n<li>Any classificationDef subtypes can further restrict the parents entityTypes restrictions by specifying a subset of the entityTypes</li>\n<li>An empty entityTypes list when there are no parent restrictions means there are no restrictions</li>\n<li>An empty entityTypes list when there are parent restrictions means that the subtype picks up the parents restrictions</li>\n<li>If a list of entityTypes are supplied, where one inherits from another, this will be rejected. This should encourage cleaner classificationsDefs</li>\n</ul>"]
-    #[serde(rename = "entityTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "entityTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entity_types: Vec<String>,
     #[doc = "An array of sub types."]
-    #[serde(rename = "subTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_types: Vec<String>,
     #[doc = "An array of super types."]
-    #[serde(rename = "superTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "superTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub super_types: Vec<String>,
 }
 impl AtlasClassificationDef {
@@ -206,7 +230,11 @@ pub struct AtlasEntitiesWithExtInfo {
     #[serde(flatten)]
     pub atlas_entity_ext_info: AtlasEntityExtInfo,
     #[doc = "An array of entities."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entities: Vec<AtlasEntity>,
 }
 impl AtlasEntitiesWithExtInfo {
@@ -223,7 +251,11 @@ pub struct AtlasEntity {
     #[serde(rename = "businessAttributes", default, skip_serializing_if = "Option::is_none")]
     pub business_attributes: Option<serde_json::Value>,
     #[doc = "An array of classifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications: Vec<AtlasClassification>,
     #[doc = "The created time of the record."]
     #[serde(rename = "createTime", default, skip_serializing_if = "Option::is_none")]
@@ -244,10 +276,18 @@ pub struct AtlasEntity {
     #[serde(rename = "isIncomplete", default, skip_serializing_if = "Option::is_none")]
     pub is_incomplete: Option<bool>,
     #[doc = "labels"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "An array of term assignment headers indicating the meanings of the entity."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meanings: Vec<AtlasTermAssignmentHeader>,
     #[doc = "Used to record the provenance of an instance of an entity or relationship."]
     #[serde(rename = "provenanceType", default, skip_serializing_if = "Option::is_none")]
@@ -291,13 +331,28 @@ pub struct AtlasEntityDef {
     #[serde(flatten)]
     pub atlas_struct_def: AtlasStructDef,
     #[doc = "An array of sub types."]
-    #[serde(rename = "subTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_types: Vec<String>,
     #[doc = "An array of super types."]
-    #[serde(rename = "superTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "superTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub super_types: Vec<String>,
     #[doc = "An array of relationship attributes."]
-    #[serde(rename = "relationshipAttributeDefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "relationshipAttributeDefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub relationship_attribute_defs: Vec<AtlasRelationshipAttributeDef>,
 }
 impl AtlasEntityDef {
@@ -323,10 +378,19 @@ pub struct AtlasEntityHeader {
     #[serde(flatten)]
     pub atlas_struct: AtlasStruct,
     #[doc = "An array of classification names."]
-    #[serde(rename = "classificationNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classification_names: Vec<String>,
     #[doc = "An array of classifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications: Vec<AtlasClassification>,
     #[doc = "The display text."]
     #[serde(rename = "displayText", default, skip_serializing_if = "Option::is_none")]
@@ -338,13 +402,26 @@ pub struct AtlasEntityHeader {
     #[serde(rename = "isIncomplete", default, skip_serializing_if = "Option::is_none")]
     pub is_incomplete: Option<bool>,
     #[doc = "labels"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<String>,
     #[doc = "An array of meanings."]
-    #[serde(rename = "meaningNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "meaningNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meaning_names: Vec<String>,
     #[doc = "An array of term assignment headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub meanings: Vec<AtlasTermAssignmentHeader>,
     #[doc = "Status of the entity - can be active or deleted. Deleted entities are not removed from Atlas store."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -390,7 +467,12 @@ pub struct AtlasEnumDef {
     #[serde(rename = "defaultValue", default, skip_serializing_if = "Option::is_none")]
     pub default_value: Option<String>,
     #[doc = "An array of enum element definitions."]
-    #[serde(rename = "elementDefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "elementDefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub element_defs: Vec<AtlasEnumElementDef>,
 }
 impl AtlasEnumDef {
@@ -420,22 +502,47 @@ impl AtlasEnumElementDef {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AtlasExtraTypeDef {
     #[doc = "Specifying a list of entityType names in the classificationDef, ensures that classifications can\nonly be applied to those entityTypes.\n<ul>\n<li>Any subtypes of the entity types inherit the restriction</li>\n<li>Any classificationDef subtypes inherit the parents entityTypes restrictions</li>\n<li>Any classificationDef subtypes can further restrict the parents entityTypes restrictions by specifying a subset of the entityTypes</li>\n<li>An empty entityTypes list when there are no parent restrictions means there are no restrictions</li>\n<li>An empty entityTypes list when there are parent restrictions means that the subtype picks up the parents restrictions</li>\n<li>If a list of entityTypes are supplied, where one inherits from another, this will be rejected. This should encourage cleaner classificationsDefs</li>\n</ul>"]
-    #[serde(rename = "entityTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "entityTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entity_types: Vec<String>,
     #[doc = "An array of sub types."]
-    #[serde(rename = "subTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "subTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_types: Vec<String>,
     #[doc = "An array of super types."]
-    #[serde(rename = "superTypes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "superTypes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub super_types: Vec<String>,
     #[doc = "An array of relationship attributes."]
-    #[serde(rename = "relationshipAttributeDefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "relationshipAttributeDefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub relationship_attribute_defs: Vec<AtlasRelationshipAttributeDef>,
     #[doc = "The default value."]
     #[serde(rename = "defaultValue", default, skip_serializing_if = "Option::is_none")]
     pub default_value: Option<String>,
     #[doc = "An array of enum element definitions."]
-    #[serde(rename = "elementDefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "elementDefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub element_defs: Vec<AtlasEnumElementDef>,
     #[doc = "The relationshipEndDef represents an end of the relationship. The end of the relationship is defined by a type, an\nattribute name, cardinality and whether it  is the container end of the relationship."]
     #[serde(rename = "endDef1", default, skip_serializing_if = "Option::is_none")]
@@ -450,7 +557,12 @@ pub struct AtlasExtraTypeDef {
     #[serde(rename = "relationshipLabel", default, skip_serializing_if = "Option::is_none")]
     pub relationship_label: Option<String>,
     #[doc = "An array of attribute definitions."]
-    #[serde(rename = "attributeDefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "attributeDefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub attribute_defs: Vec<AtlasAttributeDef>,
 }
 impl AtlasExtraTypeDef {
@@ -464,13 +576,21 @@ pub struct AtlasGlossary {
     #[serde(flatten)]
     pub atlas_glossary_base_object: AtlasGlossaryBaseObject,
     #[doc = "An array of categories."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub categories: Vec<AtlasRelatedCategoryHeader>,
     #[doc = "The language of the glossary."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub language: Option<String>,
     #[doc = "An array of related term headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub terms: Vec<AtlasRelatedTermHeader>,
     #[doc = "The usage of the glossary."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -487,7 +607,11 @@ pub struct AtlasGlossaryBaseObject {
     #[serde(flatten)]
     pub atlas_base_model_object: AtlasBaseModelObject,
     #[doc = "An array of classifications."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifications: Vec<AtlasClassification>,
     #[doc = "The long version description."]
     #[serde(rename = "longDescription", default, skip_serializing_if = "Option::is_none")]
@@ -519,13 +643,22 @@ pub struct AtlasGlossaryCategory {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub anchor: Option<AtlasGlossaryHeader>,
     #[doc = "An array of children categories."]
-    #[serde(rename = "childrenCategories", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "childrenCategories",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub children_categories: Vec<AtlasRelatedCategoryHeader>,
     #[doc = "The header of the related category."]
     #[serde(rename = "parentCategory", default, skip_serializing_if = "Option::is_none")]
     pub parent_category: Option<AtlasRelatedCategoryHeader>,
     #[doc = "An array of related term headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub terms: Vec<AtlasRelatedTermHeader>,
 }
 impl AtlasGlossaryCategory {
@@ -576,13 +709,22 @@ pub struct AtlasGlossaryTerm {
     #[doc = "The abbreviation of the term."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub abbreviation: Option<String>,
-    #[serde(rename = "templateName", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "templateName",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub template_name: Vec<serde_json::Value>,
     #[doc = "The glossary header with basic information."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub anchor: Option<AtlasGlossaryHeader>,
     #[doc = "An array of related term headers as antonyms."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub antonyms: Vec<AtlasRelatedTermHeader>,
     #[doc = "The created time of the record."]
     #[serde(rename = "createTime", default, skip_serializing_if = "Option::is_none")]
@@ -600,7 +742,11 @@ pub struct AtlasGlossaryTerm {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub status: Option<TermStatus>,
     #[doc = "An array of resource link for term"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub resources: Vec<ResourceLink>,
     #[doc = "The dictionary of contacts for terms. Key could be Expert or Steward."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -609,52 +755,123 @@ pub struct AtlasGlossaryTerm {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub attributes: Option<TermCustomAttributes>,
     #[doc = "An array of related object IDs."]
-    #[serde(rename = "assignedEntities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assignedEntities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub assigned_entities: Vec<AtlasRelatedObjectId>,
     #[doc = "An array of term categorization headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub categories: Vec<AtlasTermCategorizationHeader>,
     #[doc = "An array of related term headers."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classifies: Vec<AtlasRelatedTermHeader>,
     #[doc = "An array of examples."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub examples: Vec<String>,
     #[doc = "An array of related term headers indicating the is-a relationship."]
-    #[serde(rename = "isA", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "isA",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub is_a: Vec<AtlasRelatedTermHeader>,
     #[doc = "An array of preferred related term headers."]
-    #[serde(rename = "preferredTerms", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preferredTerms",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub preferred_terms: Vec<AtlasRelatedTermHeader>,
     #[doc = "An array of related term headers that are preferred to."]
-    #[serde(rename = "preferredToTerms", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "preferredToTerms",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub preferred_to_terms: Vec<AtlasRelatedTermHeader>,
     #[doc = "An array of related term headers that are replaced by."]
-    #[serde(rename = "replacedBy", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replacedBy",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replaced_by: Vec<AtlasRelatedTermHeader>,
     #[doc = "An array of related term headers for replacement."]
-    #[serde(rename = "replacementTerms", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "replacementTerms",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replacement_terms: Vec<AtlasRelatedTermHeader>,
     #[doc = "An array of related term headers for see also."]
-    #[serde(rename = "seeAlso", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "seeAlso",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub see_also: Vec<AtlasRelatedTermHeader>,
     #[doc = "An array of related term headers as synonyms."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub synonyms: Vec<AtlasRelatedTermHeader>,
     #[doc = "An array of translated related term headers."]
-    #[serde(rename = "translatedTerms", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "translatedTerms",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub translated_terms: Vec<AtlasRelatedTermHeader>,
     #[doc = "An array of related term headers for translation."]
-    #[serde(rename = "translationTerms", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "translationTerms",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub translation_terms: Vec<AtlasRelatedTermHeader>,
     #[doc = "The usage of the term."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub usage: Option<String>,
     #[doc = "An array of related term headers as valid values."]
-    #[serde(rename = "validValues", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validValues",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub valid_values: Vec<AtlasRelatedTermHeader>,
     #[doc = "An array of related term headers as valid values for other records."]
-    #[serde(rename = "validValuesFor", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "validValuesFor",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub valid_values_for: Vec<AtlasRelatedTermHeader>,
 }
 impl AtlasGlossaryTerm {
@@ -690,10 +907,19 @@ pub struct AtlasLineageInfo {
     #[serde(rename = "lineageDirection", default, skip_serializing_if = "Option::is_none")]
     pub lineage_direction: Option<LineageDirection>,
     #[doc = "An array of parentRelations relations."]
-    #[serde(rename = "parentRelations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "parentRelations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parent_relations: Vec<ParentRelation>,
     #[doc = "An array of lineage relations."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub relations: Vec<LineageRelation>,
 }
 impl AtlasLineageInfo {
@@ -965,7 +1191,12 @@ pub struct AtlasStructDef {
     #[serde(flatten)]
     pub atlas_base_type_def: AtlasBaseTypeDef,
     #[doc = "An array of attribute definitions."]
-    #[serde(rename = "attributeDefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "attributeDefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub attribute_defs: Vec<AtlasAttributeDef>,
 }
 impl AtlasStructDef {
@@ -1173,25 +1404,60 @@ impl AtlasTypeDefHeader {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AtlasTypesDef {
     #[doc = "businessMetadataDefs"]
-    #[serde(rename = "businessMetadataDefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "businessMetadataDefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub business_metadata_defs: Vec<AtlasBusinessMetadataDef>,
     #[doc = "An array of classification definitions."]
-    #[serde(rename = "classificationDefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationDefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classification_defs: Vec<AtlasClassificationDef>,
     #[doc = "An array of entity definitions."]
-    #[serde(rename = "entityDefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "entityDefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entity_defs: Vec<AtlasEntityDef>,
     #[doc = "An array of enum definitions."]
-    #[serde(rename = "enumDefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "enumDefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub enum_defs: Vec<AtlasEnumDef>,
     #[doc = "An array of relationship definitions."]
-    #[serde(rename = "relationshipDefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "relationshipDefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub relationship_defs: Vec<AtlasRelationshipDef>,
     #[doc = "An array of struct definitions."]
-    #[serde(rename = "structDefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "structDefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub struct_defs: Vec<AtlasStructDef>,
     #[doc = "An array of term template definitions."]
-    #[serde(rename = "termTemplateDefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "termTemplateDefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub term_template_defs: Vec<TermTemplateDef>,
 }
 impl AtlasTypesDef {
@@ -1220,7 +1486,11 @@ impl AutoCompleteRequest {
 #[doc = "The result of the autocomplete request."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct AutoCompleteResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<AutoCompleteResultValue>,
 }
 impl AutoCompleteResult {
@@ -1270,7 +1540,11 @@ pub struct BrowseResult {
     #[doc = "The total number of browse results."]
     #[serde(rename = "@search.count", default, skip_serializing_if = "Option::is_none")]
     pub search_count: Option<i32>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<BrowseResultValue>,
 }
 impl BrowseResult {
@@ -1315,7 +1589,11 @@ pub struct BrowseResultValue {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "The owners of the record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub owner: Vec<BrowseResultOwner>,
     #[doc = "The path of the record."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1333,10 +1611,20 @@ impl BrowseResultValue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct BulkImportResponse {
     #[doc = "failed importInfoList"]
-    #[serde(rename = "failedImportInfoList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "failedImportInfoList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub failed_import_info_list: Vec<ImportInfo>,
     #[doc = "successful importInfoList"]
-    #[serde(rename = "successImportInfoList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "successImportInfoList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub success_import_info_list: Vec<ImportInfo>,
 }
 impl BulkImportResponse {
@@ -1393,7 +1681,12 @@ pub struct ClassificationAssociateRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub classification: Option<AtlasClassification>,
     #[doc = "The GUID of the entity."]
-    #[serde(rename = "entityGuids", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "entityGuids",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entity_guids: Vec<String>,
 }
 impl ClassificationAssociateRequest {
@@ -1437,7 +1730,12 @@ impl ContactSearchResultValue {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DateFormat {
     #[doc = "An array of available locales."]
-    #[serde(rename = "availableLocales", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableLocales",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_locales: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub calendar: Option<f64>,
@@ -1478,7 +1776,12 @@ pub struct EntityMutationResponse {
     #[serde(rename = "mutatedEntities", default, skip_serializing_if = "Option::is_none")]
     pub mutated_entities: Option<serde_json::Value>,
     #[doc = "An array of entity headers that partially updated."]
-    #[serde(rename = "partialUpdatedEntities", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "partialUpdatedEntities",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partial_updated_entities: Vec<AtlasEntityHeader>,
 }
 impl EntityMutationResponse {
@@ -1691,7 +1994,12 @@ impl LineageRelation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct MoveEntitiesRequest {
     #[doc = "An array of entity guids to be moved to target collection."]
-    #[serde(rename = "entityGuids", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "entityGuids",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entity_guids: Vec<String>,
 }
 impl MoveEntitiesRequest {
@@ -1703,7 +2011,12 @@ impl MoveEntitiesRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct NumberFormat {
     #[doc = "The number format."]
-    #[serde(rename = "availableLocales", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableLocales",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_locales: Vec<String>,
     #[doc = "The currency."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1754,7 +2067,11 @@ impl NumberFormat {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PList {
     #[doc = "An array of objects."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub list: Vec<serde_json::Value>,
     #[doc = "The size of the page."]
     #[serde(rename = "pageSize", default, skip_serializing_if = "Option::is_none")]
@@ -1943,19 +2260,51 @@ impl SearchFacetItemValue {
 #[doc = "A facet list that consists of index fields assetType ,classification, contactId, and label. When the facet is specified in the request, the value of the facet is returned as an element of @search.facets."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SearchFacetResultValue {
-    #[serde(rename = "assetType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assetType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub asset_type: Vec<SearchFacetItemValue>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classification: Vec<SearchFacetItemValue>,
-    #[serde(rename = "classificationCategory", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "classificationCategory",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classification_category: Vec<SearchFacetItemValue>,
-    #[serde(rename = "contactId", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "contactId",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contact_id: Vec<SearchFacetItemValue>,
-    #[serde(rename = "fileExtension", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "fileExtension",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub file_extension: Vec<SearchFacetItemValue>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub label: Vec<SearchFacetItemValue>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub term: Vec<SearchFacetItemValue>,
 }
 impl SearchFacetResultValue {
@@ -1966,15 +2315,37 @@ impl SearchFacetResultValue {
 #[doc = "A highlight list that consists of index fields id ,qualifiedName, name, description, entityType. When the keyword appears in those fields, the value of the field, attached with emphasis mark, is returned as an element of @search.highlights."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SearchHighlights {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub id: Vec<String>,
-    #[serde(rename = "qualifiedName", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "qualifiedName",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub qualified_name: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub name: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub description: Vec<String>,
-    #[serde(rename = "entityType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "entityType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub entity_type: Vec<String>,
 }
 impl SearchHighlights {
@@ -1997,7 +2368,11 @@ pub struct SearchRequest {
     #[doc = "The filter for the search. See examples for the usage of supported filters."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub filter: Option<serde_json::Value>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub facets: Vec<SearchFacetItem>,
     #[serde(rename = "taxonomySetting", default, skip_serializing_if = "Option::is_none")]
     pub taxonomy_setting: Option<search_request::TaxonomySetting>,
@@ -2011,7 +2386,12 @@ pub mod search_request {
     use super::*;
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct TaxonomySetting {
-        #[serde(rename = "assetTypes", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "assetTypes",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub asset_types: Vec<String>,
         #[doc = "The content of a search facet result item."]
         #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -2032,7 +2412,11 @@ pub struct SearchResult {
     #[doc = "A facet list that consists of index fields assetType ,classification, contactId, and label. When the facet is specified in the request, the value of the facet is returned as an element of @search.facets."]
     #[serde(rename = "@search.facets", default, skip_serializing_if = "Option::is_none")]
     pub search_facets: Option<SearchFacetResultValue>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SearchResultValue>,
 }
 impl SearchResult {
@@ -2071,19 +2455,40 @@ pub struct SearchResultValue {
     #[serde(rename = "entityType", default, skip_serializing_if = "Option::is_none")]
     pub entity_type: Option<String>,
     #[doc = "The classifications of the record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classification: Vec<String>,
     #[doc = "The labels of the record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub label: Vec<String>,
     #[doc = "The terms assigned to the record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub term: Vec<TermSearchResultValue>,
     #[doc = "The contacts of the record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contact: Vec<ContactSearchResultValue>,
     #[doc = "The asset types of the record."]
-    #[serde(rename = "assetType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assetType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub asset_type: Vec<String>,
 }
 impl SearchResultValue {
@@ -2232,7 +2637,11 @@ impl SuggestRequest {
 #[doc = "The result item of the search suggest."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SuggestResult {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<SuggestResultValue>,
 }
 impl SuggestResult {
@@ -2268,19 +2677,40 @@ pub struct SuggestResultValue {
     #[serde(rename = "entityType", default, skip_serializing_if = "Option::is_none")]
     pub entity_type: Option<String>,
     #[doc = "The classifications of the record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub classification: Vec<String>,
     #[doc = "The labels of the record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub label: Vec<String>,
     #[doc = "The terms assigned to the record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub term: Vec<TermSearchResultValue>,
     #[doc = "The contacts of the record."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub contact: Vec<ContactSearchResultValue>,
     #[doc = "The asset types of the record."]
-    #[serde(rename = "assetType", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "assetType",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub asset_type: Vec<String>,
 }
 impl SuggestResultValue {
@@ -2403,7 +2833,12 @@ pub struct TimeZone {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub id: Option<String>,
     #[doc = "An array of available IDs."]
-    #[serde(rename = "availableIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "availableIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub available_ids: Vec<String>,
     #[doc = "The timezone information."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/quantum/src/package_2019_11_04_preview/models.rs b/services/svc/quantum/src/package_2019_11_04_preview/models.rs
index b7fec249f6..164e0b78c9 100644
--- a/services/svc/quantum/src/package_2019_11_04_preview/models.rs
+++ b/services/svc/quantum/src/package_2019_11_04_preview/models.rs
@@ -162,7 +162,11 @@ pub mod job_details {
 #[doc = "List of job details."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobDetailsList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobDetails>,
     #[doc = "Total records count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -191,7 +195,11 @@ pub struct ProviderStatus {
     #[doc = "Provider availability."]
     #[serde(rename = "currentAvailability", default, skip_serializing_if = "Option::is_none")]
     pub current_availability: Option<provider_status::CurrentAvailability>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<TargetStatus>,
 }
 impl ProviderStatus {
@@ -244,7 +252,11 @@ pub mod provider_status {
 #[doc = "Providers status."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderStatusList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderStatus>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -371,7 +383,11 @@ pub mod quota {
 #[doc = "List of quotas."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Quota>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/quantum/src/package_2021_05_06_preview/models.rs b/services/svc/quantum/src/package_2021_05_06_preview/models.rs
index ccd158a587..923ed64f63 100644
--- a/services/svc/quantum/src/package_2021_05_06_preview/models.rs
+++ b/services/svc/quantum/src/package_2021_05_06_preview/models.rs
@@ -90,7 +90,11 @@ pub struct JobDetails {
     #[serde(rename = "errorData", default, skip_serializing_if = "Option::is_none")]
     pub error_data: Option<ErrorData>,
     #[doc = "List of user-supplied tags associated with the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
 }
 impl JobDetails {
@@ -166,7 +170,11 @@ pub mod job_details {
 #[doc = "List of job details."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobDetailsList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobDetails>,
     #[doc = "Total records count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -274,7 +282,11 @@ pub struct ProviderStatus {
     #[doc = "Provider availability."]
     #[serde(rename = "currentAvailability", default, skip_serializing_if = "Option::is_none")]
     pub current_availability: Option<provider_status::CurrentAvailability>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<TargetStatus>,
 }
 impl ProviderStatus {
@@ -327,7 +339,11 @@ pub mod provider_status {
 #[doc = "Providers status."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderStatusList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderStatus>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -454,7 +470,11 @@ pub mod quota {
 #[doc = "List of quotas."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Quota>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/quantum/src/package_2021_11_01_preview/models.rs b/services/svc/quantum/src/package_2021_11_01_preview/models.rs
index df96ba629c..3d775b0664 100644
--- a/services/svc/quantum/src/package_2021_11_01_preview/models.rs
+++ b/services/svc/quantum/src/package_2021_11_01_preview/models.rs
@@ -28,7 +28,11 @@ pub struct CostEstimate {
     #[serde(rename = "currencyCode", default, skip_serializing_if = "Option::is_none")]
     pub currency_code: Option<String>,
     #[doc = "List of usage events"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<UsageEvent>,
     #[doc = "The estimated total."]
     #[serde(rename = "estimatedTotal", default, skip_serializing_if = "Option::is_none")]
@@ -111,7 +115,11 @@ pub struct JobDetails {
     #[serde(rename = "errorData", default, skip_serializing_if = "Option::is_none")]
     pub error_data: Option<ErrorData>,
     #[doc = "List of user-supplied tags associated with the job."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tags: Vec<String>,
 }
 impl JobDetails {
@@ -188,7 +196,11 @@ pub mod job_details {
 #[doc = "List of job details."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct JobDetailsList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<JobDetails>,
     #[doc = "Total records count number."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -296,7 +308,11 @@ pub struct ProviderStatus {
     #[doc = "Provider availability."]
     #[serde(rename = "currentAvailability", default, skip_serializing_if = "Option::is_none")]
     pub current_availability: Option<provider_status::CurrentAvailability>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub targets: Vec<TargetStatus>,
 }
 impl ProviderStatus {
@@ -349,7 +365,11 @@ pub mod provider_status {
 #[doc = "Providers status."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ProviderStatusList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ProviderStatus>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -476,7 +496,11 @@ pub mod quota {
 #[doc = "List of quotas."]
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct QuotaList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<Quota>,
     #[doc = "Link to the next page of results."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/schemaregistry/src/package_2021_10/models.rs b/services/svc/schemaregistry/src/package_2021_10/models.rs
index 16c7f0afe2..1022cf8811 100644
--- a/services/svc/schemaregistry/src/package_2021_10/models.rs
+++ b/services/svc/schemaregistry/src/package_2021_10/models.rs
@@ -22,7 +22,11 @@ pub struct ErrorDetail {
     #[doc = "Brief description of error."]
     pub message: String,
     #[doc = "Error message details to help user understand/debug failure."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
 }
 impl ErrorDetail {
@@ -39,7 +43,12 @@ pub type SchemaGroup = String;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SchemaGroups {
     #[doc = "Array of schema groups."]
-    #[serde(rename = "schemaGroups", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "schemaGroups",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schema_groups: Vec<SchemaGroup>,
 }
 impl SchemaGroups {
@@ -64,7 +73,12 @@ pub type SchemaVersion = i64;
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SchemaVersions {
     #[doc = "Array of schema groups."]
-    #[serde(rename = "schemaVersions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "schemaVersions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub schema_versions: Vec<SchemaVersion>,
 }
 impl SchemaVersions {
diff --git a/services/svc/servicefabric/src/v7_1/models.rs b/services/svc/servicefabric/src/v7_1/models.rs
index 3d87be85e8..a23c6d05be 100644
--- a/services/svc/servicefabric/src/v7_1/models.rs
+++ b/services/svc/servicefabric/src/v7_1/models.rs
@@ -395,10 +395,20 @@ pub struct ApplicationHealth {
     #[serde(rename = "Name", default, skip_serializing_if = "Option::is_none")]
     pub name: Option<ApplicationName>,
     #[doc = "Service health states as found in the health store."]
-    #[serde(rename = "ServiceHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ServiceHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_health_states: Vec<ServiceHealthState>,
     #[doc = "Deployed application health states as found in the health store."]
-    #[serde(rename = "DeployedApplicationHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "DeployedApplicationHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployed_application_health_states: Vec<DeployedApplicationHealthState>,
 }
 impl ApplicationHealth {
@@ -583,7 +593,12 @@ pub struct ApplicationHealthStateChunkList {
     #[serde(flatten)]
     pub entity_health_state_chunk_list: EntityHealthStateChunkList,
     #[doc = "The list of application health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationHealthStateChunk>,
 }
 impl ApplicationHealthStateChunkList {
@@ -604,10 +619,20 @@ pub struct ApplicationHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which services to be included in the returned cluster health chunk as children of the application. The services are returned only if the parent application matches a filter.\nIf the list is empty, no services are returned. All the services are used to evaluate the parent application aggregated health state, regardless of the input filters.\nThe application filter may specify multiple service filters.\nFor example, it can specify a filter to return all services with health state Error and another filter to always include a service identified by its service name."]
-    #[serde(rename = "ServiceFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ServiceFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_filters: Vec<ServiceHealthStateFilter>,
     #[doc = "Defines a list of filters that specify which deployed applications to be included in the returned cluster health chunk as children of the application. The deployed applications are returned only if the parent application matches a filter.\nIf the list is empty, no deployed applications are returned. All the deployed applications are used to evaluate the parent application aggregated health state, regardless of the input filters.\nThe application filter may specify multiple deployed application filters.\nFor example, it can specify a filter to return all deployed applications with health state Error and another filter to always include a deployed application on a specified node."]
-    #[serde(rename = "DeployedApplicationFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "DeployedApplicationFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployed_application_filters: Vec<DeployedApplicationHealthStateFilter>,
 }
 impl ApplicationHealthStateFilter {
@@ -932,7 +957,11 @@ pub struct ApplicationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Describes the services in the application. This property is used to create or modify services of the application. On get only the name of the service is returned. The service description can be obtained by querying for the service resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub services: Vec<ServiceResourceDescription>,
     #[doc = "Describes the diagnostics options available"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -941,7 +970,12 @@ pub struct ApplicationProperties {
     #[serde(rename = "debugParams", default, skip_serializing_if = "Option::is_none")]
     pub debug_params: Option<String>,
     #[doc = "Names of the services in the application."]
-    #[serde(rename = "serviceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_names: Vec<String>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3145,10 +3179,20 @@ pub struct ChaosSchedule {
     #[serde(rename = "ExpiryDate", default, with = "azure_core::date::rfc3339::option")]
     pub expiry_date: Option<time::OffsetDateTime>,
     #[doc = "A mapping of string names to Chaos Parameters to be referenced by Chaos Schedule Jobs."]
-    #[serde(rename = "ChaosParametersDictionary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ChaosParametersDictionary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub chaos_parameters_dictionary: Vec<ChaosParametersDictionaryItem>,
     #[doc = "A list of all Chaos Schedule Jobs that will be automated by the schedule."]
-    #[serde(rename = "Jobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Jobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jobs: Vec<ChaosScheduleJob>,
 }
 impl ChaosSchedule {
@@ -3181,7 +3225,12 @@ pub struct ChaosScheduleJob {
     #[serde(rename = "Days", default, skip_serializing_if = "Option::is_none")]
     pub days: Option<ChaosScheduleJobActiveDaysOfWeek>,
     #[doc = "A list of Time Ranges that specify when during active days that this job will run. The times are interpreted as UTC."]
-    #[serde(rename = "Times", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Times",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub times: Vec<TimeRange>,
 }
 impl ChaosScheduleJob {
@@ -3384,10 +3433,20 @@ impl ChaosStoppedEvent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChaosTargetFilter {
     #[doc = "A list of node types to include in Chaos faults.\nAll types of faults (restart node, restart code package, remove replica, restart replica, move primary, and move secondary) are enabled for the nodes of these node types.\nIf a node type (say NodeTypeX) does not appear in the NodeTypeInclusionList, then node level faults (like NodeRestart) will never be enabled for the nodes of\nNodeTypeX, but code package and replica faults can still be enabled for NodeTypeX if an application in the ApplicationInclusionList.\nhappens to reside on a node of NodeTypeX.\nAt most 100 node type names can be included in this list, to increase this number, a config upgrade is required for MaxNumberOfNodeTypesInChaosEntityFilter configuration."]
-    #[serde(rename = "NodeTypeInclusionList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeTypeInclusionList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_type_inclusion_list: Vec<NodeType>,
     #[doc = "A list of application URIs to include in Chaos faults.\nAll replicas belonging to services of these applications are amenable to replica faults (restart replica, remove replica, move primary, and move secondary) by Chaos.\nChaos may restart a code package only if the code package hosts replicas of these applications only.\nIf an application does not appear in this list, it can still be faulted in some Chaos iteration if the application ends up on a node of a node type that is included in NodeTypeInclusionList.\nHowever, if applicationX is tied to nodeTypeY through placement constraints and applicationX is absent from ApplicationInclusionList and nodeTypeY is absent from NodeTypeInclusionList, then applicationX will never be faulted.\nAt most 1000 application names can be included in this list, to increase this number, a config upgrade is required for MaxNumberOfApplicationsInChaosEntityFilter configuration."]
-    #[serde(rename = "ApplicationInclusionList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ApplicationInclusionList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_inclusion_list: Vec<ApplicationName>,
 }
 impl ChaosTargetFilter {
@@ -3557,10 +3616,20 @@ pub struct ClusterHealth {
     #[serde(flatten)]
     pub entity_health: EntityHealth,
     #[doc = "Cluster node health states as found in the health store."]
-    #[serde(rename = "NodeHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_health_states: Vec<NodeHealthState>,
     #[doc = "Cluster application health states as found in the health store."]
-    #[serde(rename = "ApplicationHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ApplicationHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_health_states: Vec<ApplicationHealthState>,
 }
 impl ClusterHealth {
@@ -3590,10 +3659,20 @@ impl ClusterHealthChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterHealthChunkQueryDescription {
     #[doc = "Defines a list of filters that specify which nodes to be included in the returned cluster health chunk.\nIf no filters are specified, no nodes are returned. All the nodes are used to evaluate the cluster's aggregated health state, regardless of the input filters.\nThe cluster health chunk query may specify multiple node filters.\nFor example, it can specify a filter to return all nodes with health state Error and another filter to always include a node identified by its NodeName."]
-    #[serde(rename = "NodeFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_filters: Vec<NodeHealthStateFilter>,
     #[doc = "Defines a list of filters that specify which applications to be included in the returned cluster health chunk.\nIf no filters are specified, no applications are returned. All the applications are used to evaluate the cluster's aggregated health state, regardless of the input filters.\nThe cluster health chunk query may specify multiple application filters.\nFor example, it can specify a filter to return all applications with health state Error and another filter to always include applications of a specified application type."]
-    #[serde(rename = "ApplicationFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ApplicationFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_filters: Vec<ApplicationHealthStateFilter>,
     #[doc = "Defines a health policy used to evaluate the health of the cluster or of a cluster node."]
     #[serde(rename = "ClusterHealthPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -3708,7 +3787,12 @@ pub struct ClusterLoadInfo {
     #[serde(rename = "LastBalancingEndTimeUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_balancing_end_time_utc: Option<time::OffsetDateTime>,
     #[doc = "List that contains metrics and their load information in this cluster."]
-    #[serde(rename = "LoadMetricInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "LoadMetricInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_metric_information: Vec<LoadMetricInformation>,
 }
 impl ClusterLoadInfo {
@@ -4512,42 +4596,87 @@ pub struct ContainerCodePackageProperties {
     #[serde(rename = "entryPoint", default, skip_serializing_if = "Option::is_none")]
     pub entry_point: Option<String>,
     #[doc = "Command array to execute within the container in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub commands: Vec<String>,
     #[doc = "The environment variables to set in this container"]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The settings to set in this container. The setting file path can be fetched from environment variable \"Fabric_SettingPath\". The path for Windows container is \"C:\\\\secrets\". The path for Linux container is \"/var/secrets\"."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub settings: Vec<Setting>,
     #[doc = "The labels to set in this container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<ContainerLabel>,
     #[doc = "The endpoints exposed by this container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointProperties>,
     #[doc = "This type describes the resource requirements for a container or a service."]
     pub resources: ResourceRequirements,
     #[doc = "Volumes to be attached to the container. The lifetime of these volumes is independent of the application's lifetime."]
-    #[serde(rename = "volumeRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_refs: Vec<VolumeReference>,
     #[doc = "Volumes to be attached to the container. The lifetime of these volumes is scoped to the application's lifetime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volumes: Vec<ApplicationScopedVolume>,
     #[doc = "Reference to sinks in DiagnosticsDescription."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub diagnostics: Option<DiagnosticsRef>,
     #[doc = "A list of ReliableCollection resources used by this particular code package. Please refer to ReliableCollectionsRef for more details."]
-    #[serde(rename = "reliableCollectionsRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reliableCollectionsRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reliable_collections_refs: Vec<ReliableCollectionsRef>,
     #[doc = "Runtime information of a container instance."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<ContainerInstanceView>,
     #[doc = "An array of liveness probes for a code package. It determines when to restart a code package."]
-    #[serde(rename = "livenessProbe", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "livenessProbe",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub liveness_probe: Vec<Probe>,
     #[doc = "An array of readiness probes for a code package. It determines when to unpublish an endpoint."]
-    #[serde(rename = "readinessProbe", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "readinessProbe",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub readiness_probe: Vec<Probe>,
 }
 impl ContainerCodePackageProperties {
@@ -4625,7 +4754,11 @@ pub struct ContainerInstanceView {
     #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
     pub previous_state: Option<ContainerState>,
     #[doc = "The events of this container instance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<ContainerEvent>,
 }
 impl ContainerInstanceView {
@@ -5067,7 +5200,12 @@ impl DeployedApplicationHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeployedApplicationHealthStateChunkList {
     #[doc = "The list of deployed application health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<DeployedApplicationHealthStateChunk>,
 }
 impl DeployedApplicationHealthStateChunkList {
@@ -5085,7 +5223,12 @@ pub struct DeployedApplicationHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which deployed service packages to be included in the returned cluster health chunk as children of the parent deployed application. The deployed service packages are returned only if the parent deployed application matches a filter.\nIf the list is empty, no deployed service packages are returned. All the deployed service packages are used to evaluate the parent deployed application aggregated health state, regardless of the input filters.\nThe deployed application filter may specify multiple deployed service package filters.\nFor example, it can specify a filter to return all deployed service packages with health state Error and another filter to always include a deployed service package on a node."]
-    #[serde(rename = "DeployedServicePackageFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "DeployedServicePackageFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployed_service_package_filters: Vec<DeployedServicePackageHealthStateFilter>,
 }
 impl DeployedApplicationHealthStateFilter {
@@ -5474,7 +5617,12 @@ impl DeployedServicePackageHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeployedServicePackageHealthStateChunkList {
     #[doc = "The list of deployed service package health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<DeployedServicePackageHealthStateChunk>,
 }
 impl DeployedServicePackageHealthStateChunkList {
@@ -5891,13 +6039,22 @@ impl Serialize for DeploymentStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticsDescription {
     #[doc = "List of supported sinks that can be referenced."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sinks: Vec<DiagnosticsSinkProperties>,
     #[doc = "Status of whether or not sinks are enabled."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "The sinks to be used if diagnostics is enabled. Sink choices can be overridden at the service and code package level."]
-    #[serde(rename = "defaultSinkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultSinkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_sink_refs: Vec<String>,
 }
 impl DiagnosticsDescription {
@@ -5912,7 +6069,12 @@ pub struct DiagnosticsRef {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "List of sinks to be used if enabled. References the list of sinks in DiagnosticsDescription."]
-    #[serde(rename = "sinkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sinkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sink_refs: Vec<String>,
 }
 impl DiagnosticsRef {
@@ -6088,7 +6250,12 @@ pub struct EntityHealth {
     #[serde(rename = "AggregatedHealthState", default, skip_serializing_if = "Option::is_none")]
     pub aggregated_health_state: Option<HealthState>,
     #[doc = "The list of health events reported on the entity."]
-    #[serde(rename = "HealthEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "HealthEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_events: Vec<HealthEvent>,
     #[doc = "List of health evaluations that resulted in the current aggregated health state."]
     #[serde(rename = "UnhealthyEvaluations", default, skip_serializing_if = "Option::is_none")]
@@ -6354,7 +6521,12 @@ pub struct ExecutingFaultsChaosEvent {
     #[serde(flatten)]
     pub chaos_event: ChaosEvent,
     #[doc = "List of string description of the faults that Chaos decided to execute in an iteration."]
-    #[serde(rename = "Faults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Faults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub faults: Vec<String>,
 }
 impl ExecutingFaultsChaosEvent {
@@ -7446,10 +7618,18 @@ pub struct GatewayProperties {
     #[serde(rename = "destinationNetwork")]
     pub destination_network: NetworkRef,
     #[doc = "Configuration for tcp connectivity for this gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tcp: Vec<TcpConfig>,
     #[doc = "Configuration for http connectivity for this gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http: Vec<HttpConfig>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7814,7 +7994,12 @@ impl HealthStateCount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthStatistics {
     #[doc = "List of health state counts per entity kind, which keeps track of how many children of the queried entity are in Ok, Warning and Error state."]
-    #[serde(rename = "HealthStateCountList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "HealthStateCountList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_state_count_list: Vec<EntityKindHealthStateCount>,
 }
 impl HealthStatistics {
@@ -8070,7 +8255,11 @@ pub struct HttpRouteMatchRule {
     #[doc = "Path to match for routing."]
     pub path: HttpRouteMatchPath,
     #[doc = "headers and their values to match in request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<HttpRouteMatchHeader>,
 }
 impl HttpRouteMatchRule {
@@ -8195,10 +8384,20 @@ impl Default for ImageRegistryPasswordType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImageStoreContent {
     #[doc = "The list of image store file info objects represents files found under the given image store relative path."]
-    #[serde(rename = "StoreFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "StoreFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub store_files: Vec<FileInfo>,
     #[doc = "The list of image store folder info objects represents subfolders found under the given image store relative path."]
-    #[serde(rename = "StoreFolders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "StoreFolders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub store_folders: Vec<FolderInfo>,
 }
 impl ImageStoreContent {
@@ -8216,7 +8415,12 @@ pub struct ImageStoreCopyDescription {
     #[serde(rename = "RemoteDestination")]
     pub remote_destination: String,
     #[doc = "The list of the file names to be skipped for copying."]
-    #[serde(rename = "SkipFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SkipFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skip_files: Vec<String>,
     #[doc = "Indicates whether to check mark file during copying. The property is true if checking mark file is required, false otherwise. The mark file is used to check whether the folder is well constructed. If the property is true and mark file does not exist, the copy is skipped."]
     #[serde(rename = "CheckMarkFile", default, skip_serializing_if = "Option::is_none")]
@@ -8715,7 +8919,12 @@ pub struct NetworkRef {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of endpoints that are exposed on this network."]
-    #[serde(rename = "endpointRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_refs: Vec<EndpointRef>,
 }
 impl NetworkRef {
@@ -9304,7 +9513,12 @@ pub struct NodeHealthStateChunkList {
     #[serde(flatten)]
     pub entity_health_state_chunk_list: EntityHealthStateChunkList,
     #[doc = "The list of node health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<NodeHealthStateChunk>,
 }
 impl NodeHealthStateChunkList {
@@ -9474,7 +9688,12 @@ pub struct NodeLoadInfo {
     #[serde(rename = "NodeName", default, skip_serializing_if = "Option::is_none")]
     pub node_name: Option<NodeName>,
     #[doc = "List that contains metrics and their load information on this node."]
-    #[serde(rename = "NodeLoadMetricInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeLoadMetricInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_load_metric_information: Vec<NodeLoadMetricInformation>,
 }
 impl NodeLoadInfo {
@@ -9751,7 +9970,12 @@ pub struct NodeRepairImpactDescription {
     #[serde(flatten)]
     pub repair_impact_description_base: RepairImpactDescriptionBase,
     #[doc = "The list of nodes impacted by a repair action and their respective expected impact."]
-    #[serde(rename = "NodeImpactList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeImpactList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_impact_list: Vec<NodeImpact>,
 }
 impl NodeRepairImpactDescription {
@@ -9768,7 +9992,12 @@ pub struct NodeRepairTargetDescription {
     #[serde(flatten)]
     pub repair_target_description_base: RepairTargetDescriptionBase,
     #[doc = "The list of nodes targeted by a repair action."]
-    #[serde(rename = "NodeNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_names: Vec<String>,
 }
 impl NodeRepairTargetDescription {
@@ -10193,7 +10422,12 @@ pub struct PagedApplicationInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of application information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationInfo>,
 }
 impl PagedApplicationInfoList {
@@ -10208,7 +10442,12 @@ pub struct PagedApplicationResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationResourceDescription>,
 }
 impl PagedApplicationResourceDescriptionList {
@@ -10223,7 +10462,12 @@ pub struct PagedApplicationTypeInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of application type information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationTypeInfo>,
 }
 impl PagedApplicationTypeInfoList {
@@ -10238,7 +10482,12 @@ pub struct PagedBackupConfigurationInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of backup configuration information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupConfigurationInfo>,
 }
 impl PagedBackupConfigurationInfoList {
@@ -10253,7 +10502,12 @@ pub struct PagedBackupEntityList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of backup entity information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupEntity>,
 }
 impl PagedBackupEntityList {
@@ -10268,7 +10522,12 @@ pub struct PagedBackupInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of backup information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupInfo>,
 }
 impl PagedBackupInfoList {
@@ -10283,7 +10542,12 @@ pub struct PagedBackupPolicyDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "The list of backup policies information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupPolicyDescription>,
 }
 impl PagedBackupPolicyDescriptionList {
@@ -10298,7 +10562,12 @@ pub struct PagedComposeDeploymentStatusInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of compose deployment status information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ComposeDeploymentStatusInfo>,
 }
 impl PagedComposeDeploymentStatusInfoList {
@@ -10313,7 +10582,12 @@ pub struct PagedDeployedApplicationInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of deployed application information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<DeployedApplicationInfo>,
 }
 impl PagedDeployedApplicationInfoList {
@@ -10328,7 +10602,12 @@ pub struct PagedGatewayResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<GatewayResourceDescription>,
 }
 impl PagedGatewayResourceDescriptionList {
@@ -10343,7 +10622,12 @@ pub struct PagedNetworkResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<NetworkResourceDescription>,
 }
 impl PagedNetworkResourceDescriptionList {
@@ -10358,7 +10642,12 @@ pub struct PagedNodeInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of node information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<NodeInfo>,
 }
 impl PagedNodeInfoList {
@@ -10376,7 +10665,12 @@ pub struct PagedPropertyInfoList {
     #[serde(rename = "IsConsistent", default, skip_serializing_if = "Option::is_none")]
     pub is_consistent: Option<bool>,
     #[doc = "List of property information."]
-    #[serde(rename = "Properties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Properties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub properties: Vec<PropertyInfo>,
 }
 impl PagedPropertyInfoList {
@@ -10391,7 +10685,12 @@ pub struct PagedReplicaInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of replica information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ReplicaInfo>,
 }
 impl PagedReplicaInfoList {
@@ -10406,7 +10705,12 @@ pub struct PagedSecretResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<SecretResourceDescription>,
 }
 impl PagedSecretResourceDescriptionList {
@@ -10421,7 +10725,12 @@ pub struct PagedSecretValueResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<SecretValueResourceDescription>,
 }
 impl PagedSecretValueResourceDescriptionList {
@@ -10436,7 +10745,12 @@ pub struct PagedServiceInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of service information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceInfo>,
 }
 impl PagedServiceInfoList {
@@ -10451,7 +10765,12 @@ pub struct PagedServicePartitionInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of service partition information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServicePartitionInfo>,
 }
 impl PagedServicePartitionInfoList {
@@ -10466,7 +10785,12 @@ pub struct PagedServiceReplicaDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of service resource replica description."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceReplicaDescription>,
 }
 impl PagedServiceReplicaDescriptionList {
@@ -10481,7 +10805,12 @@ pub struct PagedServiceResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceResourceDescription>,
 }
 impl PagedServiceResourceDescriptionList {
@@ -10499,7 +10828,12 @@ pub struct PagedSubNameInfoList {
     #[serde(rename = "IsConsistent", default, skip_serializing_if = "Option::is_none")]
     pub is_consistent: Option<bool>,
     #[doc = "List of the child names."]
-    #[serde(rename = "SubNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SubNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_names: Vec<FabricName>,
 }
 impl PagedSubNameInfoList {
@@ -10514,7 +10848,12 @@ pub struct PagedVolumeResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<VolumeResourceDescription>,
 }
 impl PagedVolumeResourceDescriptionList {
@@ -10663,7 +11002,12 @@ pub struct PartitionHealth {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "The list of replica health states associated with the partition."]
-    #[serde(rename = "ReplicaHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ReplicaHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_health_states: Vec<ReplicaHealthState>,
 }
 impl PartitionHealth {
@@ -10782,7 +11126,12 @@ impl PartitionHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartitionHealthStateChunkList {
     #[doc = "The list of partition health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<PartitionHealthStateChunk>,
 }
 impl PartitionHealthStateChunkList {
@@ -10800,7 +11149,12 @@ pub struct PartitionHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which replicas to be included in the returned cluster health chunk as children of the parent partition. The replicas are returned only if the parent partition matches a filter.\nIf the list is empty, no replicas are returned. All the replicas are used to evaluate the parent partition aggregated health state, regardless of the input filters.\nThe partition filter may specify multiple replica filters.\nFor example, it can specify a filter to return all replicas with health state Error and another filter to always include a replica identified by its replica id."]
-    #[serde(rename = "ReplicaFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ReplicaFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_filters: Vec<ReplicaHealthStateFilter>,
 }
 impl PartitionHealthStateFilter {
@@ -10864,10 +11218,20 @@ pub struct PartitionLoadInformation {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "Array of load reports from the primary replica for this partition."]
-    #[serde(rename = "PrimaryLoadMetricReports", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PrimaryLoadMetricReports",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub primary_load_metric_reports: Vec<LoadMetricReport>,
     #[doc = "Array of aggregated load reports from all secondary replicas for this partition.\nArray only contains the latest reported load for each metric."]
-    #[serde(rename = "SecondaryLoadMetricReports", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SecondaryLoadMetricReports",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secondary_load_metric_reports: Vec<LoadMetricReport>,
 }
 impl PartitionLoadInformation {
@@ -11256,7 +11620,12 @@ pub struct ProbeHttpGet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub host: Option<String>,
     #[doc = "Headers to set in the request."]
-    #[serde(rename = "httpHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_headers: Vec<ProbeHttpGetHeaders>,
     #[doc = "Scheme for the http probe. Can be Http or Https."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11343,7 +11712,12 @@ impl ProbeTcpSocket {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PropertyBatchDescriptionList {
     #[doc = "A list of the property batch operations to be executed."]
-    #[serde(rename = "Operations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Operations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<PropertyBatchOperation>,
 }
 impl PropertyBatchDescriptionList {
@@ -12508,7 +12882,12 @@ impl ReplicaHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicaHealthStateChunkList {
     #[doc = "The list of replica health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ReplicaHealthStateChunk>,
 }
 impl ReplicaHealthStateChunkList {
@@ -14203,7 +14582,12 @@ pub struct ServiceHealth {
     #[serde(rename = "Name", default, skip_serializing_if = "Option::is_none")]
     pub name: Option<ServiceName>,
     #[doc = "The list of partition health states associated with the service."]
-    #[serde(rename = "PartitionHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PartitionHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_health_states: Vec<PartitionHealthState>,
 }
 impl ServiceHealth {
@@ -14327,7 +14711,12 @@ impl ServiceHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceHealthStateChunkList {
     #[doc = "The list of service health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceHealthStateChunk>,
 }
 impl ServiceHealthStateChunkList {
@@ -14345,7 +14734,12 @@ pub struct ServiceHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which partitions to be included in the returned cluster health chunk as children of the service. The partitions are returned only if the parent service matches a filter.\nIf the list is empty, no partitions are returned. All the partitions are used to evaluate the parent service aggregated health state, regardless of the input filters.\nThe service filter may specify multiple partition filters.\nFor example, it can specify a filter to return all partitions with health state Error and another filter to always include a partition identified by its partition ID."]
-    #[serde(rename = "PartitionFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PartitionFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_filters: Vec<PartitionHealthStateFilter>,
 }
 impl ServiceHealthStateFilter {
@@ -14951,7 +15345,12 @@ pub struct ServiceProperties {
     #[serde(rename = "executionPolicy", default, skip_serializing_if = "Option::is_none")]
     pub execution_policy: Option<ExecutionPolicy>,
     #[doc = "Auto scaling policies"]
-    #[serde(rename = "autoScalingPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "autoScalingPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auto_scaling_policies: Vec<AutoScalingPolicy>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -14966,7 +15365,12 @@ pub struct ServiceProperties {
     #[serde(rename = "unhealthyEvaluation", default, skip_serializing_if = "Option::is_none")]
     pub unhealthy_evaluation: Option<String>,
     #[doc = "The service identity list."]
-    #[serde(rename = "identityRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "identityRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identity_refs: Vec<ServiceIdentity>,
     #[doc = "Dns name of the service."]
     #[serde(rename = "dnsName", default, skip_serializing_if = "Option::is_none")]
@@ -15004,7 +15408,12 @@ pub struct ServiceReplicaProperties {
     #[serde(rename = "codePackages")]
     pub code_packages: Vec<ContainerCodePackageProperties>,
     #[doc = "The names of the private networks that this service needs to be part of."]
-    #[serde(rename = "networkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_refs: Vec<NetworkRef>,
     #[doc = "Reference to sinks in DiagnosticsDescription."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -16303,7 +16712,12 @@ pub struct UnplacedReplicaInformation {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "List of reasons due to which a replica cannot be placed."]
-    #[serde(rename = "UnplacedReplicaDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "UnplacedReplicaDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unplaced_replica_details: Vec<String>,
 }
 impl UnplacedReplicaInformation {
@@ -16788,7 +17202,12 @@ impl UploadChunkRange {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UploadSession {
     #[doc = "When querying upload session by upload session ID, the result contains only one upload session. When querying upload session by image store relative path, the result might contain multiple upload sessions."]
-    #[serde(rename = "UploadSessions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "UploadSessions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upload_sessions: Vec<UploadSessionInfo>,
 }
 impl UploadSession {
@@ -16812,7 +17231,12 @@ pub struct UploadSessionInfo {
     #[serde(rename = "FileSize", default, skip_serializing_if = "Option::is_none")]
     pub file_size: Option<String>,
     #[doc = "List of chunk ranges that image store has not received yet."]
-    #[serde(rename = "ExpectedRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ExpectedRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub expected_ranges: Vec<UploadChunkRange>,
 }
 impl UploadSessionInfo {
diff --git a/services/svc/servicefabric/src/v7_2/models.rs b/services/svc/servicefabric/src/v7_2/models.rs
index 32e95098bc..185a9896da 100644
--- a/services/svc/servicefabric/src/v7_2/models.rs
+++ b/services/svc/servicefabric/src/v7_2/models.rs
@@ -395,10 +395,20 @@ pub struct ApplicationHealth {
     #[serde(rename = "Name", default, skip_serializing_if = "Option::is_none")]
     pub name: Option<ApplicationName>,
     #[doc = "Service health states as found in the health store."]
-    #[serde(rename = "ServiceHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ServiceHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_health_states: Vec<ServiceHealthState>,
     #[doc = "Deployed application health states as found in the health store."]
-    #[serde(rename = "DeployedApplicationHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "DeployedApplicationHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployed_application_health_states: Vec<DeployedApplicationHealthState>,
 }
 impl ApplicationHealth {
@@ -595,7 +605,12 @@ pub struct ApplicationHealthStateChunkList {
     #[serde(flatten)]
     pub entity_health_state_chunk_list: EntityHealthStateChunkList,
     #[doc = "The list of application health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationHealthStateChunk>,
 }
 impl ApplicationHealthStateChunkList {
@@ -616,10 +631,20 @@ pub struct ApplicationHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which services to be included in the returned cluster health chunk as children of the application. The services are returned only if the parent application matches a filter.\nIf the list is empty, no services are returned. All the services are used to evaluate the parent application aggregated health state, regardless of the input filters.\nThe application filter may specify multiple service filters.\nFor example, it can specify a filter to return all services with health state Error and another filter to always include a service identified by its service name."]
-    #[serde(rename = "ServiceFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ServiceFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_filters: Vec<ServiceHealthStateFilter>,
     #[doc = "Defines a list of filters that specify which deployed applications to be included in the returned cluster health chunk as children of the application. The deployed applications are returned only if the parent application matches a filter.\nIf the list is empty, no deployed applications are returned. All the deployed applications are used to evaluate the parent application aggregated health state, regardless of the input filters.\nThe application filter may specify multiple deployed application filters.\nFor example, it can specify a filter to return all deployed applications with health state Error and another filter to always include a deployed application on a specified node."]
-    #[serde(rename = "DeployedApplicationFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "DeployedApplicationFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployed_application_filters: Vec<DeployedApplicationHealthStateFilter>,
 }
 impl ApplicationHealthStateFilter {
@@ -944,7 +969,11 @@ pub struct ApplicationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Describes the services in the application. This property is used to create or modify services of the application. On get only the name of the service is returned. The service description can be obtained by querying for the service resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub services: Vec<ServiceResourceDescription>,
     #[doc = "Describes the diagnostics options available"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -953,7 +982,12 @@ pub struct ApplicationProperties {
     #[serde(rename = "debugParams", default, skip_serializing_if = "Option::is_none")]
     pub debug_params: Option<String>,
     #[doc = "Names of the services in the application."]
-    #[serde(rename = "serviceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_names: Vec<String>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3159,10 +3193,20 @@ pub struct ChaosSchedule {
     #[serde(rename = "ExpiryDate", default, with = "azure_core::date::rfc3339::option")]
     pub expiry_date: Option<time::OffsetDateTime>,
     #[doc = "A mapping of string names to Chaos Parameters to be referenced by Chaos Schedule Jobs."]
-    #[serde(rename = "ChaosParametersDictionary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ChaosParametersDictionary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub chaos_parameters_dictionary: Vec<ChaosParametersDictionaryItem>,
     #[doc = "A list of all Chaos Schedule Jobs that will be automated by the schedule."]
-    #[serde(rename = "Jobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Jobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jobs: Vec<ChaosScheduleJob>,
 }
 impl ChaosSchedule {
@@ -3195,7 +3239,12 @@ pub struct ChaosScheduleJob {
     #[serde(rename = "Days", default, skip_serializing_if = "Option::is_none")]
     pub days: Option<ChaosScheduleJobActiveDaysOfWeek>,
     #[doc = "A list of Time Ranges that specify when during active days that this job will run. The times are interpreted as UTC."]
-    #[serde(rename = "Times", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Times",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub times: Vec<TimeRange>,
 }
 impl ChaosScheduleJob {
@@ -3398,10 +3447,20 @@ impl ChaosStoppedEvent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChaosTargetFilter {
     #[doc = "A list of node types to include in Chaos faults.\nAll types of faults (restart node, restart code package, remove replica, restart replica, move primary, and move secondary) are enabled for the nodes of these node types.\nIf a node type (say NodeTypeX) does not appear in the NodeTypeInclusionList, then node level faults (like NodeRestart) will never be enabled for the nodes of\nNodeTypeX, but code package and replica faults can still be enabled for NodeTypeX if an application in the ApplicationInclusionList.\nhappens to reside on a node of NodeTypeX.\nAt most 100 node type names can be included in this list, to increase this number, a config upgrade is required for MaxNumberOfNodeTypesInChaosEntityFilter configuration."]
-    #[serde(rename = "NodeTypeInclusionList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeTypeInclusionList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_type_inclusion_list: Vec<NodeType>,
     #[doc = "A list of application URIs to include in Chaos faults.\nAll replicas belonging to services of these applications are amenable to replica faults (restart replica, remove replica, move primary, and move secondary) by Chaos.\nChaos may restart a code package only if the code package hosts replicas of these applications only.\nIf an application does not appear in this list, it can still be faulted in some Chaos iteration if the application ends up on a node of a node type that is included in NodeTypeInclusionList.\nHowever, if applicationX is tied to nodeTypeY through placement constraints and applicationX is absent from ApplicationInclusionList and nodeTypeY is absent from NodeTypeInclusionList, then applicationX will never be faulted.\nAt most 1000 application names can be included in this list, to increase this number, a config upgrade is required for MaxNumberOfApplicationsInChaosEntityFilter configuration."]
-    #[serde(rename = "ApplicationInclusionList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ApplicationInclusionList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_inclusion_list: Vec<ApplicationName>,
 }
 impl ChaosTargetFilter {
@@ -3571,10 +3630,20 @@ pub struct ClusterHealth {
     #[serde(flatten)]
     pub entity_health: EntityHealth,
     #[doc = "Cluster node health states as found in the health store."]
-    #[serde(rename = "NodeHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_health_states: Vec<NodeHealthState>,
     #[doc = "Cluster application health states as found in the health store."]
-    #[serde(rename = "ApplicationHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ApplicationHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_health_states: Vec<ApplicationHealthState>,
 }
 impl ClusterHealth {
@@ -3604,10 +3673,20 @@ impl ClusterHealthChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterHealthChunkQueryDescription {
     #[doc = "Defines a list of filters that specify which nodes to be included in the returned cluster health chunk.\nIf no filters are specified, no nodes are returned. All the nodes are used to evaluate the cluster's aggregated health state, regardless of the input filters.\nThe cluster health chunk query may specify multiple node filters.\nFor example, it can specify a filter to return all nodes with health state Error and another filter to always include a node identified by its NodeName."]
-    #[serde(rename = "NodeFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_filters: Vec<NodeHealthStateFilter>,
     #[doc = "Defines a list of filters that specify which applications to be included in the returned cluster health chunk.\nIf no filters are specified, no applications are returned. All the applications are used to evaluate the cluster's aggregated health state, regardless of the input filters.\nThe cluster health chunk query may specify multiple application filters.\nFor example, it can specify a filter to return all applications with health state Error and another filter to always include applications of a specified application type."]
-    #[serde(rename = "ApplicationFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ApplicationFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_filters: Vec<ApplicationHealthStateFilter>,
     #[doc = "Defines a health policy used to evaluate the health of the cluster or of a cluster node."]
     #[serde(rename = "ClusterHealthPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -3722,7 +3801,12 @@ pub struct ClusterLoadInfo {
     #[serde(rename = "LastBalancingEndTimeUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_balancing_end_time_utc: Option<time::OffsetDateTime>,
     #[doc = "List that contains metrics and their load information in this cluster."]
-    #[serde(rename = "LoadMetricInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "LoadMetricInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_metric_information: Vec<LoadMetricInformation>,
 }
 impl ClusterLoadInfo {
@@ -4526,42 +4610,87 @@ pub struct ContainerCodePackageProperties {
     #[serde(rename = "entryPoint", default, skip_serializing_if = "Option::is_none")]
     pub entry_point: Option<String>,
     #[doc = "Command array to execute within the container in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub commands: Vec<String>,
     #[doc = "The environment variables to set in this container"]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The settings to set in this container. The setting file path can be fetched from environment variable \"Fabric_SettingPath\". The path for Windows container is \"C:\\\\secrets\". The path for Linux container is \"/var/secrets\"."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub settings: Vec<Setting>,
     #[doc = "The labels to set in this container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<ContainerLabel>,
     #[doc = "The endpoints exposed by this container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointProperties>,
     #[doc = "This type describes the resource requirements for a container or a service."]
     pub resources: ResourceRequirements,
     #[doc = "Volumes to be attached to the container. The lifetime of these volumes is independent of the application's lifetime."]
-    #[serde(rename = "volumeRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_refs: Vec<VolumeReference>,
     #[doc = "Volumes to be attached to the container. The lifetime of these volumes is scoped to the application's lifetime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volumes: Vec<ApplicationScopedVolume>,
     #[doc = "Reference to sinks in DiagnosticsDescription."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub diagnostics: Option<DiagnosticsRef>,
     #[doc = "A list of ReliableCollection resources used by this particular code package. Please refer to ReliableCollectionsRef for more details."]
-    #[serde(rename = "reliableCollectionsRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reliableCollectionsRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reliable_collections_refs: Vec<ReliableCollectionsRef>,
     #[doc = "Runtime information of a container instance."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<ContainerInstanceView>,
     #[doc = "An array of liveness probes for a code package. It determines when to restart a code package."]
-    #[serde(rename = "livenessProbe", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "livenessProbe",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub liveness_probe: Vec<Probe>,
     #[doc = "An array of readiness probes for a code package. It determines when to unpublish an endpoint."]
-    #[serde(rename = "readinessProbe", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "readinessProbe",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub readiness_probe: Vec<Probe>,
 }
 impl ContainerCodePackageProperties {
@@ -4639,7 +4768,11 @@ pub struct ContainerInstanceView {
     #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
     pub previous_state: Option<ContainerState>,
     #[doc = "The events of this container instance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<ContainerEvent>,
 }
 impl ContainerInstanceView {
@@ -5081,7 +5214,12 @@ impl DeployedApplicationHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeployedApplicationHealthStateChunkList {
     #[doc = "The list of deployed application health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<DeployedApplicationHealthStateChunk>,
 }
 impl DeployedApplicationHealthStateChunkList {
@@ -5099,7 +5237,12 @@ pub struct DeployedApplicationHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which deployed service packages to be included in the returned cluster health chunk as children of the parent deployed application. The deployed service packages are returned only if the parent deployed application matches a filter.\nIf the list is empty, no deployed service packages are returned. All the deployed service packages are used to evaluate the parent deployed application aggregated health state, regardless of the input filters.\nThe deployed application filter may specify multiple deployed service package filters.\nFor example, it can specify a filter to return all deployed service packages with health state Error and another filter to always include a deployed service package on a node."]
-    #[serde(rename = "DeployedServicePackageFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "DeployedServicePackageFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployed_service_package_filters: Vec<DeployedServicePackageHealthStateFilter>,
 }
 impl DeployedApplicationHealthStateFilter {
@@ -5488,7 +5631,12 @@ impl DeployedServicePackageHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeployedServicePackageHealthStateChunkList {
     #[doc = "The list of deployed service package health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<DeployedServicePackageHealthStateChunk>,
 }
 impl DeployedServicePackageHealthStateChunkList {
@@ -5905,13 +6053,22 @@ impl Serialize for DeploymentStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticsDescription {
     #[doc = "List of supported sinks that can be referenced."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sinks: Vec<DiagnosticsSinkProperties>,
     #[doc = "Status of whether or not sinks are enabled."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "The sinks to be used if diagnostics is enabled. Sink choices can be overridden at the service and code package level."]
-    #[serde(rename = "defaultSinkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultSinkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_sink_refs: Vec<String>,
 }
 impl DiagnosticsDescription {
@@ -5926,7 +6083,12 @@ pub struct DiagnosticsRef {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "List of sinks to be used if enabled. References the list of sinks in DiagnosticsDescription."]
-    #[serde(rename = "sinkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sinkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sink_refs: Vec<String>,
 }
 impl DiagnosticsRef {
@@ -6127,7 +6289,12 @@ pub struct EntityHealth {
     #[serde(rename = "AggregatedHealthState", default, skip_serializing_if = "Option::is_none")]
     pub aggregated_health_state: Option<HealthState>,
     #[doc = "The list of health events reported on the entity."]
-    #[serde(rename = "HealthEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "HealthEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_events: Vec<HealthEvent>,
     #[doc = "List of health evaluations that resulted in the current aggregated health state."]
     #[serde(rename = "UnhealthyEvaluations", default, skip_serializing_if = "Option::is_none")]
@@ -6393,7 +6560,12 @@ pub struct ExecutingFaultsChaosEvent {
     #[serde(flatten)]
     pub chaos_event: ChaosEvent,
     #[doc = "List of string description of the faults that Chaos decided to execute in an iteration."]
-    #[serde(rename = "Faults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Faults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub faults: Vec<String>,
 }
 impl ExecutingFaultsChaosEvent {
@@ -7485,10 +7657,18 @@ pub struct GatewayProperties {
     #[serde(rename = "destinationNetwork")]
     pub destination_network: NetworkRef,
     #[doc = "Configuration for tcp connectivity for this gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tcp: Vec<TcpConfig>,
     #[doc = "Configuration for http connectivity for this gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http: Vec<HttpConfig>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7853,7 +8033,12 @@ impl HealthStateCount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthStatistics {
     #[doc = "List of health state counts per entity kind, which keeps track of how many children of the queried entity are in Ok, Warning and Error state."]
-    #[serde(rename = "HealthStateCountList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "HealthStateCountList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_state_count_list: Vec<EntityKindHealthStateCount>,
 }
 impl HealthStatistics {
@@ -8109,7 +8294,11 @@ pub struct HttpRouteMatchRule {
     #[doc = "Path to match for routing."]
     pub path: HttpRouteMatchPath,
     #[doc = "headers and their values to match in request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<HttpRouteMatchHeader>,
 }
 impl HttpRouteMatchRule {
@@ -8234,10 +8423,20 @@ impl Default for ImageRegistryPasswordType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImageStoreContent {
     #[doc = "The list of image store file info objects represents files found under the given image store relative path."]
-    #[serde(rename = "StoreFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "StoreFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub store_files: Vec<FileInfo>,
     #[doc = "The list of image store folder info objects represents subfolders found under the given image store relative path."]
-    #[serde(rename = "StoreFolders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "StoreFolders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub store_folders: Vec<FolderInfo>,
 }
 impl ImageStoreContent {
@@ -8255,7 +8454,12 @@ pub struct ImageStoreCopyDescription {
     #[serde(rename = "RemoteDestination")]
     pub remote_destination: String,
     #[doc = "The list of the file names to be skipped for copying."]
-    #[serde(rename = "SkipFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SkipFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skip_files: Vec<String>,
     #[doc = "Indicates whether to check mark file during copying. The property is true if checking mark file is required, false otherwise. The mark file is used to check whether the folder is well constructed. If the property is true and mark file does not exist, the copy is skipped."]
     #[serde(rename = "CheckMarkFile", default, skip_serializing_if = "Option::is_none")]
@@ -8772,7 +8976,12 @@ pub struct NetworkRef {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of endpoints that are exposed on this network."]
-    #[serde(rename = "endpointRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_refs: Vec<EndpointRef>,
 }
 impl NetworkRef {
@@ -9361,7 +9570,12 @@ pub struct NodeHealthStateChunkList {
     #[serde(flatten)]
     pub entity_health_state_chunk_list: EntityHealthStateChunkList,
     #[doc = "The list of node health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<NodeHealthStateChunk>,
 }
 impl NodeHealthStateChunkList {
@@ -9531,7 +9745,12 @@ pub struct NodeLoadInfo {
     #[serde(rename = "NodeName", default, skip_serializing_if = "Option::is_none")]
     pub node_name: Option<NodeName>,
     #[doc = "List that contains metrics and their load information on this node."]
-    #[serde(rename = "NodeLoadMetricInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeLoadMetricInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_load_metric_information: Vec<NodeLoadMetricInformation>,
 }
 impl NodeLoadInfo {
@@ -9808,7 +10027,12 @@ pub struct NodeRepairImpactDescription {
     #[serde(flatten)]
     pub repair_impact_description_base: RepairImpactDescriptionBase,
     #[doc = "The list of nodes impacted by a repair action and their respective expected impact."]
-    #[serde(rename = "NodeImpactList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeImpactList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_impact_list: Vec<NodeImpact>,
 }
 impl NodeRepairImpactDescription {
@@ -9825,7 +10049,12 @@ pub struct NodeRepairTargetDescription {
     #[serde(flatten)]
     pub repair_target_description_base: RepairTargetDescriptionBase,
     #[doc = "The list of nodes targeted by a repair action."]
-    #[serde(rename = "NodeNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_names: Vec<String>,
 }
 impl NodeRepairTargetDescription {
@@ -10250,7 +10479,12 @@ pub struct PagedApplicationInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of application information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationInfo>,
 }
 impl PagedApplicationInfoList {
@@ -10265,7 +10499,12 @@ pub struct PagedApplicationResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationResourceDescription>,
 }
 impl PagedApplicationResourceDescriptionList {
@@ -10280,7 +10519,12 @@ pub struct PagedApplicationTypeInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of application type information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationTypeInfo>,
 }
 impl PagedApplicationTypeInfoList {
@@ -10295,7 +10539,12 @@ pub struct PagedBackupConfigurationInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of backup configuration information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupConfigurationInfo>,
 }
 impl PagedBackupConfigurationInfoList {
@@ -10310,7 +10559,12 @@ pub struct PagedBackupEntityList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of backup entity information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupEntity>,
 }
 impl PagedBackupEntityList {
@@ -10325,7 +10579,12 @@ pub struct PagedBackupInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of backup information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupInfo>,
 }
 impl PagedBackupInfoList {
@@ -10340,7 +10599,12 @@ pub struct PagedBackupPolicyDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "The list of backup policies information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupPolicyDescription>,
 }
 impl PagedBackupPolicyDescriptionList {
@@ -10355,7 +10619,12 @@ pub struct PagedComposeDeploymentStatusInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of compose deployment status information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ComposeDeploymentStatusInfo>,
 }
 impl PagedComposeDeploymentStatusInfoList {
@@ -10370,7 +10639,12 @@ pub struct PagedDeployedApplicationInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of deployed application information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<DeployedApplicationInfo>,
 }
 impl PagedDeployedApplicationInfoList {
@@ -10385,7 +10659,12 @@ pub struct PagedGatewayResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<GatewayResourceDescription>,
 }
 impl PagedGatewayResourceDescriptionList {
@@ -10400,7 +10679,12 @@ pub struct PagedNetworkResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<NetworkResourceDescription>,
 }
 impl PagedNetworkResourceDescriptionList {
@@ -10415,7 +10699,12 @@ pub struct PagedNodeInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of node information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<NodeInfo>,
 }
 impl PagedNodeInfoList {
@@ -10433,7 +10722,12 @@ pub struct PagedPropertyInfoList {
     #[serde(rename = "IsConsistent", default, skip_serializing_if = "Option::is_none")]
     pub is_consistent: Option<bool>,
     #[doc = "List of property information."]
-    #[serde(rename = "Properties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Properties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub properties: Vec<PropertyInfo>,
 }
 impl PagedPropertyInfoList {
@@ -10448,7 +10742,12 @@ pub struct PagedReplicaInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of replica information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ReplicaInfo>,
 }
 impl PagedReplicaInfoList {
@@ -10463,7 +10762,12 @@ pub struct PagedSecretResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<SecretResourceDescription>,
 }
 impl PagedSecretResourceDescriptionList {
@@ -10478,7 +10782,12 @@ pub struct PagedSecretValueResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<SecretValueResourceDescription>,
 }
 impl PagedSecretValueResourceDescriptionList {
@@ -10493,7 +10802,12 @@ pub struct PagedServiceInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of service information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceInfo>,
 }
 impl PagedServiceInfoList {
@@ -10508,7 +10822,12 @@ pub struct PagedServicePartitionInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of service partition information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServicePartitionInfo>,
 }
 impl PagedServicePartitionInfoList {
@@ -10523,7 +10842,12 @@ pub struct PagedServiceReplicaDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of service resource replica description."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceReplicaDescription>,
 }
 impl PagedServiceReplicaDescriptionList {
@@ -10538,7 +10862,12 @@ pub struct PagedServiceResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceResourceDescription>,
 }
 impl PagedServiceResourceDescriptionList {
@@ -10556,7 +10885,12 @@ pub struct PagedSubNameInfoList {
     #[serde(rename = "IsConsistent", default, skip_serializing_if = "Option::is_none")]
     pub is_consistent: Option<bool>,
     #[doc = "List of the child names."]
-    #[serde(rename = "SubNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SubNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_names: Vec<FabricName>,
 }
 impl PagedSubNameInfoList {
@@ -10571,7 +10905,12 @@ pub struct PagedUpdatePartitionLoadResultList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of partition load update information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<UpdatePartitionLoadResult>,
 }
 impl PagedUpdatePartitionLoadResultList {
@@ -10586,7 +10925,12 @@ pub struct PagedVolumeResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<VolumeResourceDescription>,
 }
 impl PagedVolumeResourceDescriptionList {
@@ -10735,7 +11079,12 @@ pub struct PartitionHealth {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "The list of replica health states associated with the partition."]
-    #[serde(rename = "ReplicaHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ReplicaHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_health_states: Vec<ReplicaHealthState>,
 }
 impl PartitionHealth {
@@ -10854,7 +11203,12 @@ impl PartitionHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartitionHealthStateChunkList {
     #[doc = "The list of partition health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<PartitionHealthStateChunk>,
 }
 impl PartitionHealthStateChunkList {
@@ -10872,7 +11226,12 @@ pub struct PartitionHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which replicas to be included in the returned cluster health chunk as children of the parent partition. The replicas are returned only if the parent partition matches a filter.\nIf the list is empty, no replicas are returned. All the replicas are used to evaluate the parent partition aggregated health state, regardless of the input filters.\nThe partition filter may specify multiple replica filters.\nFor example, it can specify a filter to return all replicas with health state Error and another filter to always include a replica identified by its replica id."]
-    #[serde(rename = "ReplicaFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ReplicaFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_filters: Vec<ReplicaHealthStateFilter>,
 }
 impl PartitionHealthStateFilter {
@@ -10936,10 +11295,20 @@ pub struct PartitionLoadInformation {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "Array of load reports from the primary replica for this partition."]
-    #[serde(rename = "PrimaryLoadMetricReports", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PrimaryLoadMetricReports",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub primary_load_metric_reports: Vec<LoadMetricReport>,
     #[doc = "Array of aggregated load reports from all secondary replicas for this partition.\nArray only contains the latest reported load for each metric."]
-    #[serde(rename = "SecondaryLoadMetricReports", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SecondaryLoadMetricReports",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secondary_load_metric_reports: Vec<LoadMetricReport>,
 }
 impl PartitionLoadInformation {
@@ -10954,15 +11323,26 @@ pub struct PartitionMetricLoadDescription {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "Partition's load information for primary replica, in case partition is from a stateful service."]
-    #[serde(rename = "PrimaryReplicaLoadEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PrimaryReplicaLoadEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub primary_replica_load_entries: Vec<MetricLoadDescription>,
     #[doc = "Partition's load information for all secondary replicas or instances."]
-    #[serde(rename = "SecondaryReplicasOrInstancesLoadEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SecondaryReplicasOrInstancesLoadEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secondary_replicas_or_instances_load_entries: Vec<MetricLoadDescription>,
     #[doc = "Partition's load information for a specific secondary replica or instance located on a specific node."]
     #[serde(
         rename = "SecondaryReplicaOrInstanceLoadEntriesPerNode",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub secondary_replica_or_instance_load_entries_per_node: Vec<ReplicaMetricLoadDescription>,
@@ -11354,7 +11734,12 @@ pub struct ProbeHttpGet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub host: Option<String>,
     #[doc = "Headers to set in the request."]
-    #[serde(rename = "httpHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_headers: Vec<ProbeHttpGetHeaders>,
     #[doc = "Scheme for the http probe. Can be Http or Https."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11441,7 +11826,12 @@ impl ProbeTcpSocket {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PropertyBatchDescriptionList {
     #[doc = "A list of the property batch operations to be executed."]
-    #[serde(rename = "Operations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Operations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<PropertyBatchOperation>,
 }
 impl PropertyBatchDescriptionList {
@@ -12606,7 +12996,12 @@ impl ReplicaHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicaHealthStateChunkList {
     #[doc = "The list of replica health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ReplicaHealthStateChunk>,
 }
 impl ReplicaHealthStateChunkList {
@@ -12709,7 +13104,12 @@ pub struct ReplicaMetricLoadDescription {
     #[serde(rename = "NodeName", default, skip_serializing_if = "Option::is_none")]
     pub node_name: Option<String>,
     #[doc = "Loads of a different metrics for a partition's secondary replica or instance."]
-    #[serde(rename = "ReplicaOrInstanceLoadEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ReplicaOrInstanceLoadEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_or_instance_load_entries: Vec<MetricLoadDescription>,
 }
 impl ReplicaMetricLoadDescription {
@@ -14316,7 +14716,12 @@ pub struct ServiceHealth {
     #[serde(rename = "Name", default, skip_serializing_if = "Option::is_none")]
     pub name: Option<ServiceName>,
     #[doc = "The list of partition health states associated with the service."]
-    #[serde(rename = "PartitionHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PartitionHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_health_states: Vec<PartitionHealthState>,
 }
 impl ServiceHealth {
@@ -14440,7 +14845,12 @@ impl ServiceHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceHealthStateChunkList {
     #[doc = "The list of service health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceHealthStateChunk>,
 }
 impl ServiceHealthStateChunkList {
@@ -14458,7 +14868,12 @@ pub struct ServiceHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which partitions to be included in the returned cluster health chunk as children of the service. The partitions are returned only if the parent service matches a filter.\nIf the list is empty, no partitions are returned. All the partitions are used to evaluate the parent service aggregated health state, regardless of the input filters.\nThe service filter may specify multiple partition filters.\nFor example, it can specify a filter to return all partitions with health state Error and another filter to always include a partition identified by its partition ID."]
-    #[serde(rename = "PartitionFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PartitionFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_filters: Vec<PartitionHealthStateFilter>,
 }
 impl ServiceHealthStateFilter {
@@ -15068,7 +15483,12 @@ pub struct ServiceProperties {
     #[serde(rename = "executionPolicy", default, skip_serializing_if = "Option::is_none")]
     pub execution_policy: Option<ExecutionPolicy>,
     #[doc = "Auto scaling policies"]
-    #[serde(rename = "autoScalingPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "autoScalingPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auto_scaling_policies: Vec<AutoScalingPolicy>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -15083,7 +15503,12 @@ pub struct ServiceProperties {
     #[serde(rename = "unhealthyEvaluation", default, skip_serializing_if = "Option::is_none")]
     pub unhealthy_evaluation: Option<String>,
     #[doc = "The service identity list."]
-    #[serde(rename = "identityRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "identityRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identity_refs: Vec<ServiceIdentity>,
     #[doc = "Dns name of the service."]
     #[serde(rename = "dnsName", default, skip_serializing_if = "Option::is_none")]
@@ -15121,7 +15546,12 @@ pub struct ServiceReplicaProperties {
     #[serde(rename = "codePackages")]
     pub code_packages: Vec<ContainerCodePackageProperties>,
     #[doc = "The names of the private networks that this service needs to be part of."]
-    #[serde(rename = "networkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_refs: Vec<NetworkRef>,
     #[doc = "Reference to sinks in DiagnosticsDescription."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -16428,7 +16858,12 @@ pub struct UnplacedReplicaInformation {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "List of reasons due to which a replica cannot be placed."]
-    #[serde(rename = "UnplacedReplicaDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "UnplacedReplicaDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unplaced_replica_details: Vec<String>,
 }
 impl UnplacedReplicaInformation {
@@ -16928,7 +17363,12 @@ impl UploadChunkRange {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UploadSession {
     #[doc = "When querying upload session by upload session ID, the result contains only one upload session. When querying upload session by image store relative path, the result might contain multiple upload sessions."]
-    #[serde(rename = "UploadSessions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "UploadSessions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upload_sessions: Vec<UploadSessionInfo>,
 }
 impl UploadSession {
@@ -16952,7 +17392,12 @@ pub struct UploadSessionInfo {
     #[serde(rename = "FileSize", default, skip_serializing_if = "Option::is_none")]
     pub file_size: Option<String>,
     #[doc = "List of chunk ranges that image store has not received yet."]
-    #[serde(rename = "ExpectedRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ExpectedRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub expected_ranges: Vec<UploadChunkRange>,
 }
 impl UploadSessionInfo {
diff --git a/services/svc/servicefabric/src/v8_0/models.rs b/services/svc/servicefabric/src/v8_0/models.rs
index 64edf503f3..acc1a2bdb7 100644
--- a/services/svc/servicefabric/src/v8_0/models.rs
+++ b/services/svc/servicefabric/src/v8_0/models.rs
@@ -395,10 +395,20 @@ pub struct ApplicationHealth {
     #[serde(rename = "Name", default, skip_serializing_if = "Option::is_none")]
     pub name: Option<ApplicationName>,
     #[doc = "Service health states as found in the health store."]
-    #[serde(rename = "ServiceHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ServiceHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_health_states: Vec<ServiceHealthState>,
     #[doc = "Deployed application health states as found in the health store."]
-    #[serde(rename = "DeployedApplicationHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "DeployedApplicationHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployed_application_health_states: Vec<DeployedApplicationHealthState>,
 }
 impl ApplicationHealth {
@@ -595,7 +605,12 @@ pub struct ApplicationHealthStateChunkList {
     #[serde(flatten)]
     pub entity_health_state_chunk_list: EntityHealthStateChunkList,
     #[doc = "The list of application health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationHealthStateChunk>,
 }
 impl ApplicationHealthStateChunkList {
@@ -616,10 +631,20 @@ pub struct ApplicationHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which services to be included in the returned cluster health chunk as children of the application. The services are returned only if the parent application matches a filter.\nIf the list is empty, no services are returned. All the services are used to evaluate the parent application aggregated health state, regardless of the input filters.\nThe application filter may specify multiple service filters.\nFor example, it can specify a filter to return all services with health state Error and another filter to always include a service identified by its service name."]
-    #[serde(rename = "ServiceFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ServiceFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_filters: Vec<ServiceHealthStateFilter>,
     #[doc = "Defines a list of filters that specify which deployed applications to be included in the returned cluster health chunk as children of the application. The deployed applications are returned only if the parent application matches a filter.\nIf the list is empty, no deployed applications are returned. All the deployed applications are used to evaluate the parent application aggregated health state, regardless of the input filters.\nThe application filter may specify multiple deployed application filters.\nFor example, it can specify a filter to return all deployed applications with health state Error and another filter to always include a deployed application on a specified node."]
-    #[serde(rename = "DeployedApplicationFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "DeployedApplicationFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployed_application_filters: Vec<DeployedApplicationHealthStateFilter>,
 }
 impl ApplicationHealthStateFilter {
@@ -947,7 +972,11 @@ pub struct ApplicationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Describes the services in the application. This property is used to create or modify services of the application. On get only the name of the service is returned. The service description can be obtained by querying for the service resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub services: Vec<ServiceResourceDescription>,
     #[doc = "Describes the diagnostics options available"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -956,7 +985,12 @@ pub struct ApplicationProperties {
     #[serde(rename = "debugParams", default, skip_serializing_if = "Option::is_none")]
     pub debug_params: Option<String>,
     #[doc = "Names of the services in the application."]
-    #[serde(rename = "serviceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_names: Vec<String>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3175,10 +3209,20 @@ pub struct ChaosSchedule {
     #[serde(rename = "ExpiryDate", default, with = "azure_core::date::rfc3339::option")]
     pub expiry_date: Option<time::OffsetDateTime>,
     #[doc = "A mapping of string names to Chaos Parameters to be referenced by Chaos Schedule Jobs."]
-    #[serde(rename = "ChaosParametersDictionary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ChaosParametersDictionary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub chaos_parameters_dictionary: Vec<ChaosParametersDictionaryItem>,
     #[doc = "A list of all Chaos Schedule Jobs that will be automated by the schedule."]
-    #[serde(rename = "Jobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Jobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jobs: Vec<ChaosScheduleJob>,
 }
 impl ChaosSchedule {
@@ -3211,7 +3255,12 @@ pub struct ChaosScheduleJob {
     #[serde(rename = "Days", default, skip_serializing_if = "Option::is_none")]
     pub days: Option<ChaosScheduleJobActiveDaysOfWeek>,
     #[doc = "A list of Time Ranges that specify when during active days that this job will run. The times are interpreted as UTC."]
-    #[serde(rename = "Times", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Times",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub times: Vec<TimeRange>,
 }
 impl ChaosScheduleJob {
@@ -3414,10 +3463,20 @@ impl ChaosStoppedEvent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChaosTargetFilter {
     #[doc = "A list of node types to include in Chaos faults.\nAll types of faults (restart node, restart code package, remove replica, restart replica, move primary, and move secondary) are enabled for the nodes of these node types.\nIf a node type (say NodeTypeX) does not appear in the NodeTypeInclusionList, then node level faults (like NodeRestart) will never be enabled for the nodes of\nNodeTypeX, but code package and replica faults can still be enabled for NodeTypeX if an application in the ApplicationInclusionList.\nhappens to reside on a node of NodeTypeX.\nAt most 100 node type names can be included in this list, to increase this number, a config upgrade is required for MaxNumberOfNodeTypesInChaosEntityFilter configuration."]
-    #[serde(rename = "NodeTypeInclusionList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeTypeInclusionList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_type_inclusion_list: Vec<NodeType>,
     #[doc = "A list of application URIs to include in Chaos faults.\nAll replicas belonging to services of these applications are amenable to replica faults (restart replica, remove replica, move primary, and move secondary) by Chaos.\nChaos may restart a code package only if the code package hosts replicas of these applications only.\nIf an application does not appear in this list, it can still be faulted in some Chaos iteration if the application ends up on a node of a node type that is included in NodeTypeInclusionList.\nHowever, if applicationX is tied to nodeTypeY through placement constraints and applicationX is absent from ApplicationInclusionList and nodeTypeY is absent from NodeTypeInclusionList, then applicationX will never be faulted.\nAt most 1000 application names can be included in this list, to increase this number, a config upgrade is required for MaxNumberOfApplicationsInChaosEntityFilter configuration."]
-    #[serde(rename = "ApplicationInclusionList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ApplicationInclusionList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_inclusion_list: Vec<ApplicationName>,
 }
 impl ChaosTargetFilter {
@@ -3587,10 +3646,20 @@ pub struct ClusterHealth {
     #[serde(flatten)]
     pub entity_health: EntityHealth,
     #[doc = "Cluster node health states as found in the health store."]
-    #[serde(rename = "NodeHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_health_states: Vec<NodeHealthState>,
     #[doc = "Cluster application health states as found in the health store."]
-    #[serde(rename = "ApplicationHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ApplicationHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_health_states: Vec<ApplicationHealthState>,
 }
 impl ClusterHealth {
@@ -3620,10 +3689,20 @@ impl ClusterHealthChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterHealthChunkQueryDescription {
     #[doc = "Defines a list of filters that specify which nodes to be included in the returned cluster health chunk.\nIf no filters are specified, no nodes are returned. All the nodes are used to evaluate the cluster's aggregated health state, regardless of the input filters.\nThe cluster health chunk query may specify multiple node filters.\nFor example, it can specify a filter to return all nodes with health state Error and another filter to always include a node identified by its NodeName."]
-    #[serde(rename = "NodeFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_filters: Vec<NodeHealthStateFilter>,
     #[doc = "Defines a list of filters that specify which applications to be included in the returned cluster health chunk.\nIf no filters are specified, no applications are returned. All the applications are used to evaluate the cluster's aggregated health state, regardless of the input filters.\nThe cluster health chunk query may specify multiple application filters.\nFor example, it can specify a filter to return all applications with health state Error and another filter to always include applications of a specified application type."]
-    #[serde(rename = "ApplicationFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ApplicationFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_filters: Vec<ApplicationHealthStateFilter>,
     #[doc = "Defines a health policy used to evaluate the health of the cluster or of a cluster node."]
     #[serde(rename = "ClusterHealthPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -3741,7 +3820,12 @@ pub struct ClusterLoadInfo {
     #[serde(rename = "LastBalancingEndTimeUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_balancing_end_time_utc: Option<time::OffsetDateTime>,
     #[doc = "List that contains metrics and their load information in this cluster."]
-    #[serde(rename = "LoadMetricInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "LoadMetricInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_metric_information: Vec<LoadMetricInformation>,
 }
 impl ClusterLoadInfo {
@@ -4545,42 +4629,87 @@ pub struct ContainerCodePackageProperties {
     #[serde(rename = "entryPoint", default, skip_serializing_if = "Option::is_none")]
     pub entry_point: Option<String>,
     #[doc = "Command array to execute within the container in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub commands: Vec<String>,
     #[doc = "The environment variables to set in this container"]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The settings to set in this container. The setting file path can be fetched from environment variable \"Fabric_SettingPath\". The path for Windows container is \"C:\\\\secrets\". The path for Linux container is \"/var/secrets\"."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub settings: Vec<Setting>,
     #[doc = "The labels to set in this container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<ContainerLabel>,
     #[doc = "The endpoints exposed by this container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointProperties>,
     #[doc = "This type describes the resource requirements for a container or a service."]
     pub resources: ResourceRequirements,
     #[doc = "Volumes to be attached to the container. The lifetime of these volumes is independent of the application's lifetime."]
-    #[serde(rename = "volumeRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_refs: Vec<VolumeReference>,
     #[doc = "Volumes to be attached to the container. The lifetime of these volumes is scoped to the application's lifetime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volumes: Vec<ApplicationScopedVolume>,
     #[doc = "Reference to sinks in DiagnosticsDescription."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub diagnostics: Option<DiagnosticsRef>,
     #[doc = "A list of ReliableCollection resources used by this particular code package. Please refer to ReliableCollectionsRef for more details."]
-    #[serde(rename = "reliableCollectionsRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reliableCollectionsRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reliable_collections_refs: Vec<ReliableCollectionsRef>,
     #[doc = "Runtime information of a container instance."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<ContainerInstanceView>,
     #[doc = "An array of liveness probes for a code package. It determines when to restart a code package."]
-    #[serde(rename = "livenessProbe", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "livenessProbe",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub liveness_probe: Vec<Probe>,
     #[doc = "An array of readiness probes for a code package. It determines when to unpublish an endpoint."]
-    #[serde(rename = "readinessProbe", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "readinessProbe",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub readiness_probe: Vec<Probe>,
 }
 impl ContainerCodePackageProperties {
@@ -4658,7 +4787,11 @@ pub struct ContainerInstanceView {
     #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
     pub previous_state: Option<ContainerState>,
     #[doc = "The events of this container instance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<ContainerEvent>,
 }
 impl ContainerInstanceView {
@@ -5100,7 +5233,12 @@ impl DeployedApplicationHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeployedApplicationHealthStateChunkList {
     #[doc = "The list of deployed application health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<DeployedApplicationHealthStateChunk>,
 }
 impl DeployedApplicationHealthStateChunkList {
@@ -5118,7 +5256,12 @@ pub struct DeployedApplicationHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which deployed service packages to be included in the returned cluster health chunk as children of the parent deployed application. The deployed service packages are returned only if the parent deployed application matches a filter.\nIf the list is empty, no deployed service packages are returned. All the deployed service packages are used to evaluate the parent deployed application aggregated health state, regardless of the input filters.\nThe deployed application filter may specify multiple deployed service package filters.\nFor example, it can specify a filter to return all deployed service packages with health state Error and another filter to always include a deployed service package on a node."]
-    #[serde(rename = "DeployedServicePackageFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "DeployedServicePackageFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployed_service_package_filters: Vec<DeployedServicePackageHealthStateFilter>,
 }
 impl DeployedApplicationHealthStateFilter {
@@ -5507,7 +5650,12 @@ impl DeployedServicePackageHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeployedServicePackageHealthStateChunkList {
     #[doc = "The list of deployed service package health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<DeployedServicePackageHealthStateChunk>,
 }
 impl DeployedServicePackageHealthStateChunkList {
@@ -5924,13 +6072,22 @@ impl Serialize for DeploymentStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticsDescription {
     #[doc = "List of supported sinks that can be referenced."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sinks: Vec<DiagnosticsSinkProperties>,
     #[doc = "Status of whether or not sinks are enabled."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "The sinks to be used if diagnostics is enabled. Sink choices can be overridden at the service and code package level."]
-    #[serde(rename = "defaultSinkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultSinkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_sink_refs: Vec<String>,
 }
 impl DiagnosticsDescription {
@@ -5945,7 +6102,12 @@ pub struct DiagnosticsRef {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "List of sinks to be used if enabled. References the list of sinks in DiagnosticsDescription."]
-    #[serde(rename = "sinkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sinkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sink_refs: Vec<String>,
 }
 impl DiagnosticsRef {
@@ -6146,7 +6308,12 @@ pub struct EntityHealth {
     #[serde(rename = "AggregatedHealthState", default, skip_serializing_if = "Option::is_none")]
     pub aggregated_health_state: Option<HealthState>,
     #[doc = "The list of health events reported on the entity."]
-    #[serde(rename = "HealthEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "HealthEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_events: Vec<HealthEvent>,
     #[doc = "List of health evaluations that resulted in the current aggregated health state."]
     #[serde(rename = "UnhealthyEvaluations", default, skip_serializing_if = "Option::is_none")]
@@ -6412,7 +6579,12 @@ pub struct ExecutingFaultsChaosEvent {
     #[serde(flatten)]
     pub chaos_event: ChaosEvent,
     #[doc = "List of string description of the faults that Chaos decided to execute in an iteration."]
-    #[serde(rename = "Faults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Faults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub faults: Vec<String>,
 }
 impl ExecutingFaultsChaosEvent {
@@ -7504,10 +7676,18 @@ pub struct GatewayProperties {
     #[serde(rename = "destinationNetwork")]
     pub destination_network: NetworkRef,
     #[doc = "Configuration for tcp connectivity for this gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tcp: Vec<TcpConfig>,
     #[doc = "Configuration for http connectivity for this gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http: Vec<HttpConfig>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7874,7 +8054,12 @@ impl HealthStateCount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthStatistics {
     #[doc = "List of health state counts per entity kind, which keeps track of how many children of the queried entity are in Ok, Warning and Error state."]
-    #[serde(rename = "HealthStateCountList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "HealthStateCountList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_state_count_list: Vec<EntityKindHealthStateCount>,
 }
 impl HealthStatistics {
@@ -8130,7 +8315,11 @@ pub struct HttpRouteMatchRule {
     #[doc = "Path to match for routing."]
     pub path: HttpRouteMatchPath,
     #[doc = "headers and their values to match in request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<HttpRouteMatchHeader>,
 }
 impl HttpRouteMatchRule {
@@ -8255,10 +8444,20 @@ impl Default for ImageRegistryPasswordType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImageStoreContent {
     #[doc = "The list of image store file info objects represents files found under the given image store relative path."]
-    #[serde(rename = "StoreFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "StoreFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub store_files: Vec<FileInfo>,
     #[doc = "The list of image store folder info objects represents subfolders found under the given image store relative path."]
-    #[serde(rename = "StoreFolders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "StoreFolders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub store_folders: Vec<FolderInfo>,
 }
 impl ImageStoreContent {
@@ -8276,7 +8475,12 @@ pub struct ImageStoreCopyDescription {
     #[serde(rename = "RemoteDestination")]
     pub remote_destination: String,
     #[doc = "The list of the file names to be skipped for copying."]
-    #[serde(rename = "SkipFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SkipFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skip_files: Vec<String>,
     #[doc = "Indicates whether to check mark file during copying. The property is true if checking mark file is required, false otherwise. The mark file is used to check whether the folder is well constructed. If the property is true and mark file does not exist, the copy is skipped."]
     #[serde(rename = "CheckMarkFile", default, skip_serializing_if = "Option::is_none")]
@@ -8627,7 +8831,12 @@ pub struct LoadedPartitionInformationResultList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of application information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<LoadedPartitionInformationResult>,
 }
 impl LoadedPartitionInformationResultList {
@@ -8940,7 +9149,12 @@ pub struct NetworkRef {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of endpoints that are exposed on this network."]
-    #[serde(rename = "endpointRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_refs: Vec<EndpointRef>,
 }
 impl NetworkRef {
@@ -9529,7 +9743,12 @@ pub struct NodeHealthStateChunkList {
     #[serde(flatten)]
     pub entity_health_state_chunk_list: EntityHealthStateChunkList,
     #[doc = "The list of node health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<NodeHealthStateChunk>,
 }
 impl NodeHealthStateChunkList {
@@ -9702,7 +9921,12 @@ pub struct NodeLoadInfo {
     #[serde(rename = "NodeName", default, skip_serializing_if = "Option::is_none")]
     pub node_name: Option<NodeName>,
     #[doc = "List that contains metrics and their load information on this node."]
-    #[serde(rename = "NodeLoadMetricInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeLoadMetricInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_load_metric_information: Vec<NodeLoadMetricInformation>,
 }
 impl NodeLoadInfo {
@@ -9979,7 +10203,12 @@ pub struct NodeRepairImpactDescription {
     #[serde(flatten)]
     pub repair_impact_description_base: RepairImpactDescriptionBase,
     #[doc = "The list of nodes impacted by a repair action and their respective expected impact."]
-    #[serde(rename = "NodeImpactList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeImpactList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_impact_list: Vec<NodeImpact>,
 }
 impl NodeRepairImpactDescription {
@@ -9996,7 +10225,12 @@ pub struct NodeRepairTargetDescription {
     #[serde(flatten)]
     pub repair_target_description_base: RepairTargetDescriptionBase,
     #[doc = "The list of nodes targeted by a repair action."]
-    #[serde(rename = "NodeNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_names: Vec<String>,
 }
 impl NodeRepairTargetDescription {
@@ -10525,7 +10759,12 @@ pub struct PagedApplicationInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of application information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationInfo>,
 }
 impl PagedApplicationInfoList {
@@ -10540,7 +10779,12 @@ pub struct PagedApplicationResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationResourceDescription>,
 }
 impl PagedApplicationResourceDescriptionList {
@@ -10555,7 +10799,12 @@ pub struct PagedApplicationTypeInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of application type information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationTypeInfo>,
 }
 impl PagedApplicationTypeInfoList {
@@ -10570,7 +10819,12 @@ pub struct PagedBackupConfigurationInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of backup configuration information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupConfigurationInfo>,
 }
 impl PagedBackupConfigurationInfoList {
@@ -10585,7 +10839,12 @@ pub struct PagedBackupEntityList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of backup entity information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupEntity>,
 }
 impl PagedBackupEntityList {
@@ -10600,7 +10859,12 @@ pub struct PagedBackupInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of backup information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupInfo>,
 }
 impl PagedBackupInfoList {
@@ -10615,7 +10879,12 @@ pub struct PagedBackupPolicyDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "The list of backup policies information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupPolicyDescription>,
 }
 impl PagedBackupPolicyDescriptionList {
@@ -10630,7 +10899,12 @@ pub struct PagedComposeDeploymentStatusInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of compose deployment status information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ComposeDeploymentStatusInfo>,
 }
 impl PagedComposeDeploymentStatusInfoList {
@@ -10645,7 +10919,12 @@ pub struct PagedDeployedApplicationInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of deployed application information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<DeployedApplicationInfo>,
 }
 impl PagedDeployedApplicationInfoList {
@@ -10660,7 +10939,12 @@ pub struct PagedGatewayResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<GatewayResourceDescription>,
 }
 impl PagedGatewayResourceDescriptionList {
@@ -10675,7 +10959,12 @@ pub struct PagedNetworkResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<NetworkResourceDescription>,
 }
 impl PagedNetworkResourceDescriptionList {
@@ -10690,7 +10979,12 @@ pub struct PagedNodeInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of node information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<NodeInfo>,
 }
 impl PagedNodeInfoList {
@@ -10708,7 +11002,12 @@ pub struct PagedPropertyInfoList {
     #[serde(rename = "IsConsistent", default, skip_serializing_if = "Option::is_none")]
     pub is_consistent: Option<bool>,
     #[doc = "List of property information."]
-    #[serde(rename = "Properties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Properties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub properties: Vec<PropertyInfo>,
 }
 impl PagedPropertyInfoList {
@@ -10723,7 +11022,12 @@ pub struct PagedReplicaInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of replica information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ReplicaInfo>,
 }
 impl PagedReplicaInfoList {
@@ -10738,7 +11042,12 @@ pub struct PagedSecretResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<SecretResourceDescription>,
 }
 impl PagedSecretResourceDescriptionList {
@@ -10753,7 +11062,12 @@ pub struct PagedSecretValueResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<SecretValueResourceDescription>,
 }
 impl PagedSecretValueResourceDescriptionList {
@@ -10768,7 +11082,12 @@ pub struct PagedServiceInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of service information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceInfo>,
 }
 impl PagedServiceInfoList {
@@ -10783,7 +11102,12 @@ pub struct PagedServicePartitionInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of service partition information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServicePartitionInfo>,
 }
 impl PagedServicePartitionInfoList {
@@ -10798,7 +11122,12 @@ pub struct PagedServiceReplicaDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of service resource replica description."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceReplicaDescription>,
 }
 impl PagedServiceReplicaDescriptionList {
@@ -10813,7 +11142,12 @@ pub struct PagedServiceResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceResourceDescription>,
 }
 impl PagedServiceResourceDescriptionList {
@@ -10831,7 +11165,12 @@ pub struct PagedSubNameInfoList {
     #[serde(rename = "IsConsistent", default, skip_serializing_if = "Option::is_none")]
     pub is_consistent: Option<bool>,
     #[doc = "List of the child names."]
-    #[serde(rename = "SubNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SubNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_names: Vec<FabricName>,
 }
 impl PagedSubNameInfoList {
@@ -10846,7 +11185,12 @@ pub struct PagedUpdatePartitionLoadResultList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of partition load update information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<UpdatePartitionLoadResult>,
 }
 impl PagedUpdatePartitionLoadResultList {
@@ -10861,7 +11205,12 @@ pub struct PagedVolumeResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<VolumeResourceDescription>,
 }
 impl PagedVolumeResourceDescriptionList {
@@ -11010,7 +11359,12 @@ pub struct PartitionHealth {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "The list of replica health states associated with the partition."]
-    #[serde(rename = "ReplicaHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ReplicaHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_health_states: Vec<ReplicaHealthState>,
 }
 impl PartitionHealth {
@@ -11129,7 +11483,12 @@ impl PartitionHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartitionHealthStateChunkList {
     #[doc = "The list of partition health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<PartitionHealthStateChunk>,
 }
 impl PartitionHealthStateChunkList {
@@ -11147,7 +11506,12 @@ pub struct PartitionHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which replicas to be included in the returned cluster health chunk as children of the parent partition. The replicas are returned only if the parent partition matches a filter.\nIf the list is empty, no replicas are returned. All the replicas are used to evaluate the parent partition aggregated health state, regardless of the input filters.\nThe partition filter may specify multiple replica filters.\nFor example, it can specify a filter to return all replicas with health state Error and another filter to always include a replica identified by its replica id."]
-    #[serde(rename = "ReplicaFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ReplicaFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_filters: Vec<ReplicaHealthStateFilter>,
 }
 impl PartitionHealthStateFilter {
@@ -11211,10 +11575,20 @@ pub struct PartitionLoadInformation {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "Array of load reports from the primary replica for this partition."]
-    #[serde(rename = "PrimaryLoadMetricReports", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PrimaryLoadMetricReports",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub primary_load_metric_reports: Vec<LoadMetricReport>,
     #[doc = "Array of aggregated load reports from all secondary replicas for this partition.\nArray only contains the latest reported load for each metric."]
-    #[serde(rename = "SecondaryLoadMetricReports", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SecondaryLoadMetricReports",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secondary_load_metric_reports: Vec<LoadMetricReport>,
 }
 impl PartitionLoadInformation {
@@ -11229,15 +11603,26 @@ pub struct PartitionMetricLoadDescription {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "Partition's load information for primary replica, in case partition is from a stateful service."]
-    #[serde(rename = "PrimaryReplicaLoadEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PrimaryReplicaLoadEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub primary_replica_load_entries: Vec<MetricLoadDescription>,
     #[doc = "Partition's load information for all secondary replicas or instances."]
-    #[serde(rename = "SecondaryReplicasOrInstancesLoadEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SecondaryReplicasOrInstancesLoadEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secondary_replicas_or_instances_load_entries: Vec<MetricLoadDescription>,
     #[doc = "Partition's load information for a specific secondary replica or instance located on a specific node."]
     #[serde(
         rename = "SecondaryReplicaOrInstanceLoadEntriesPerNode",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub secondary_replica_or_instance_load_entries_per_node: Vec<ReplicaMetricLoadDescription>,
@@ -11629,7 +12014,12 @@ pub struct ProbeHttpGet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub host: Option<String>,
     #[doc = "Headers to set in the request."]
-    #[serde(rename = "httpHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_headers: Vec<ProbeHttpGetHeaders>,
     #[doc = "Scheme for the http probe. Can be Http or Https."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11716,7 +12106,12 @@ impl ProbeTcpSocket {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PropertyBatchDescriptionList {
     #[doc = "A list of the property batch operations to be executed."]
-    #[serde(rename = "Operations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Operations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<PropertyBatchOperation>,
 }
 impl PropertyBatchDescriptionList {
@@ -12881,7 +13276,12 @@ impl ReplicaHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicaHealthStateChunkList {
     #[doc = "The list of replica health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ReplicaHealthStateChunk>,
 }
 impl ReplicaHealthStateChunkList {
@@ -13003,7 +13403,12 @@ pub struct ReplicaMetricLoadDescription {
     #[serde(rename = "NodeName", default, skip_serializing_if = "Option::is_none")]
     pub node_name: Option<String>,
     #[doc = "Loads of a different metrics for a partition's secondary replica or instance."]
-    #[serde(rename = "ReplicaOrInstanceLoadEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ReplicaOrInstanceLoadEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_or_instance_load_entries: Vec<MetricLoadDescription>,
 }
 impl ReplicaMetricLoadDescription {
@@ -14618,7 +15023,12 @@ pub struct ServiceHealth {
     #[serde(rename = "Name", default, skip_serializing_if = "Option::is_none")]
     pub name: Option<ServiceName>,
     #[doc = "The list of partition health states associated with the service."]
-    #[serde(rename = "PartitionHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PartitionHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_health_states: Vec<PartitionHealthState>,
 }
 impl ServiceHealth {
@@ -14742,7 +15152,12 @@ impl ServiceHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceHealthStateChunkList {
     #[doc = "The list of service health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceHealthStateChunk>,
 }
 impl ServiceHealthStateChunkList {
@@ -14760,7 +15175,12 @@ pub struct ServiceHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which partitions to be included in the returned cluster health chunk as children of the service. The partitions are returned only if the parent service matches a filter.\nIf the list is empty, no partitions are returned. All the partitions are used to evaluate the parent service aggregated health state, regardless of the input filters.\nThe service filter may specify multiple partition filters.\nFor example, it can specify a filter to return all partitions with health state Error and another filter to always include a partition identified by its partition ID."]
-    #[serde(rename = "PartitionFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PartitionFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_filters: Vec<PartitionHealthStateFilter>,
 }
 impl ServiceHealthStateFilter {
@@ -15387,7 +15807,12 @@ pub struct ServiceProperties {
     #[serde(rename = "executionPolicy", default, skip_serializing_if = "Option::is_none")]
     pub execution_policy: Option<ExecutionPolicy>,
     #[doc = "Auto scaling policies"]
-    #[serde(rename = "autoScalingPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "autoScalingPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auto_scaling_policies: Vec<AutoScalingPolicy>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -15402,7 +15827,12 @@ pub struct ServiceProperties {
     #[serde(rename = "unhealthyEvaluation", default, skip_serializing_if = "Option::is_none")]
     pub unhealthy_evaluation: Option<String>,
     #[doc = "The service identity list."]
-    #[serde(rename = "identityRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "identityRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identity_refs: Vec<ServiceIdentity>,
     #[doc = "Dns name of the service."]
     #[serde(rename = "dnsName", default, skip_serializing_if = "Option::is_none")]
@@ -15440,7 +15870,12 @@ pub struct ServiceReplicaProperties {
     #[serde(rename = "codePackages")]
     pub code_packages: Vec<ContainerCodePackageProperties>,
     #[doc = "The names of the private networks that this service needs to be part of."]
-    #[serde(rename = "networkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_refs: Vec<NetworkRef>,
     #[doc = "Reference to sinks in DiagnosticsDescription."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -16783,7 +17218,12 @@ pub struct UnplacedReplicaInformation {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "List of reasons due to which a replica cannot be placed."]
-    #[serde(rename = "UnplacedReplicaDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "UnplacedReplicaDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unplaced_replica_details: Vec<String>,
 }
 impl UnplacedReplicaInformation {
@@ -17283,7 +17723,12 @@ impl UploadChunkRange {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UploadSession {
     #[doc = "When querying upload session by upload session ID, the result contains only one upload session. When querying upload session by image store relative path, the result might contain multiple upload sessions."]
-    #[serde(rename = "UploadSessions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "UploadSessions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upload_sessions: Vec<UploadSessionInfo>,
 }
 impl UploadSession {
@@ -17307,7 +17752,12 @@ pub struct UploadSessionInfo {
     #[serde(rename = "FileSize", default, skip_serializing_if = "Option::is_none")]
     pub file_size: Option<String>,
     #[doc = "List of chunk ranges that image store has not received yet."]
-    #[serde(rename = "ExpectedRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ExpectedRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub expected_ranges: Vec<UploadChunkRange>,
 }
 impl UploadSessionInfo {
diff --git a/services/svc/servicefabric/src/v8_1/models.rs b/services/svc/servicefabric/src/v8_1/models.rs
index 03e6fe852f..1f248d52ad 100644
--- a/services/svc/servicefabric/src/v8_1/models.rs
+++ b/services/svc/servicefabric/src/v8_1/models.rs
@@ -395,10 +395,20 @@ pub struct ApplicationHealth {
     #[serde(rename = "Name", default, skip_serializing_if = "Option::is_none")]
     pub name: Option<ApplicationName>,
     #[doc = "Service health states as found in the health store."]
-    #[serde(rename = "ServiceHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ServiceHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_health_states: Vec<ServiceHealthState>,
     #[doc = "Deployed application health states as found in the health store."]
-    #[serde(rename = "DeployedApplicationHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "DeployedApplicationHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployed_application_health_states: Vec<DeployedApplicationHealthState>,
 }
 impl ApplicationHealth {
@@ -595,7 +605,12 @@ pub struct ApplicationHealthStateChunkList {
     #[serde(flatten)]
     pub entity_health_state_chunk_list: EntityHealthStateChunkList,
     #[doc = "The list of application health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationHealthStateChunk>,
 }
 impl ApplicationHealthStateChunkList {
@@ -616,10 +631,20 @@ pub struct ApplicationHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which services to be included in the returned cluster health chunk as children of the application. The services are returned only if the parent application matches a filter.\nIf the list is empty, no services are returned. All the services are used to evaluate the parent application aggregated health state, regardless of the input filters.\nThe application filter may specify multiple service filters.\nFor example, it can specify a filter to return all services with health state Error and another filter to always include a service identified by its service name."]
-    #[serde(rename = "ServiceFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ServiceFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_filters: Vec<ServiceHealthStateFilter>,
     #[doc = "Defines a list of filters that specify which deployed applications to be included in the returned cluster health chunk as children of the application. The deployed applications are returned only if the parent application matches a filter.\nIf the list is empty, no deployed applications are returned. All the deployed applications are used to evaluate the parent application aggregated health state, regardless of the input filters.\nThe application filter may specify multiple deployed application filters.\nFor example, it can specify a filter to return all deployed applications with health state Error and another filter to always include a deployed application on a specified node."]
-    #[serde(rename = "DeployedApplicationFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "DeployedApplicationFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployed_application_filters: Vec<DeployedApplicationHealthStateFilter>,
 }
 impl ApplicationHealthStateFilter {
@@ -947,7 +972,11 @@ pub struct ApplicationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Describes the services in the application. This property is used to create or modify services of the application. On get only the name of the service is returned. The service description can be obtained by querying for the service resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub services: Vec<ServiceResourceDescription>,
     #[doc = "Describes the diagnostics options available"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -956,7 +985,12 @@ pub struct ApplicationProperties {
     #[serde(rename = "debugParams", default, skip_serializing_if = "Option::is_none")]
     pub debug_params: Option<String>,
     #[doc = "Names of the services in the application."]
-    #[serde(rename = "serviceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_names: Vec<String>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3199,10 +3233,20 @@ pub struct ChaosSchedule {
     #[serde(rename = "ExpiryDate", default, with = "azure_core::date::rfc3339::option")]
     pub expiry_date: Option<time::OffsetDateTime>,
     #[doc = "A mapping of string names to Chaos Parameters to be referenced by Chaos Schedule Jobs."]
-    #[serde(rename = "ChaosParametersDictionary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ChaosParametersDictionary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub chaos_parameters_dictionary: Vec<ChaosParametersDictionaryItem>,
     #[doc = "A list of all Chaos Schedule Jobs that will be automated by the schedule."]
-    #[serde(rename = "Jobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Jobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jobs: Vec<ChaosScheduleJob>,
 }
 impl ChaosSchedule {
@@ -3235,7 +3279,12 @@ pub struct ChaosScheduleJob {
     #[serde(rename = "Days", default, skip_serializing_if = "Option::is_none")]
     pub days: Option<ChaosScheduleJobActiveDaysOfWeek>,
     #[doc = "A list of Time Ranges that specify when during active days that this job will run. The times are interpreted as UTC."]
-    #[serde(rename = "Times", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Times",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub times: Vec<TimeRange>,
 }
 impl ChaosScheduleJob {
@@ -3438,10 +3487,20 @@ impl ChaosStoppedEvent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChaosTargetFilter {
     #[doc = "A list of node types to include in Chaos faults.\nAll types of faults (restart node, restart code package, remove replica, restart replica, move primary, and move secondary) are enabled for the nodes of these node types.\nIf a node type (say NodeTypeX) does not appear in the NodeTypeInclusionList, then node level faults (like NodeRestart) will never be enabled for the nodes of\nNodeTypeX, but code package and replica faults can still be enabled for NodeTypeX if an application in the ApplicationInclusionList.\nhappens to reside on a node of NodeTypeX.\nAt most 100 node type names can be included in this list, to increase this number, a config upgrade is required for MaxNumberOfNodeTypesInChaosEntityFilter configuration."]
-    #[serde(rename = "NodeTypeInclusionList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeTypeInclusionList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_type_inclusion_list: Vec<NodeType>,
     #[doc = "A list of application URIs to include in Chaos faults.\nAll replicas belonging to services of these applications are amenable to replica faults (restart replica, remove replica, move primary, and move secondary) by Chaos.\nChaos may restart a code package only if the code package hosts replicas of these applications only.\nIf an application does not appear in this list, it can still be faulted in some Chaos iteration if the application ends up on a node of a node type that is included in NodeTypeInclusionList.\nHowever, if applicationX is tied to nodeTypeY through placement constraints and applicationX is absent from ApplicationInclusionList and nodeTypeY is absent from NodeTypeInclusionList, then applicationX will never be faulted.\nAt most 1000 application names can be included in this list, to increase this number, a config upgrade is required for MaxNumberOfApplicationsInChaosEntityFilter configuration."]
-    #[serde(rename = "ApplicationInclusionList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ApplicationInclusionList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_inclusion_list: Vec<ApplicationName>,
 }
 impl ChaosTargetFilter {
@@ -3611,10 +3670,20 @@ pub struct ClusterHealth {
     #[serde(flatten)]
     pub entity_health: EntityHealth,
     #[doc = "Cluster node health states as found in the health store."]
-    #[serde(rename = "NodeHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_health_states: Vec<NodeHealthState>,
     #[doc = "Cluster application health states as found in the health store."]
-    #[serde(rename = "ApplicationHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ApplicationHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_health_states: Vec<ApplicationHealthState>,
 }
 impl ClusterHealth {
@@ -3644,10 +3713,20 @@ impl ClusterHealthChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterHealthChunkQueryDescription {
     #[doc = "Defines a list of filters that specify which nodes to be included in the returned cluster health chunk.\nIf no filters are specified, no nodes are returned. All the nodes are used to evaluate the cluster's aggregated health state, regardless of the input filters.\nThe cluster health chunk query may specify multiple node filters.\nFor example, it can specify a filter to return all nodes with health state Error and another filter to always include a node identified by its NodeName."]
-    #[serde(rename = "NodeFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_filters: Vec<NodeHealthStateFilter>,
     #[doc = "Defines a list of filters that specify which applications to be included in the returned cluster health chunk.\nIf no filters are specified, no applications are returned. All the applications are used to evaluate the cluster's aggregated health state, regardless of the input filters.\nThe cluster health chunk query may specify multiple application filters.\nFor example, it can specify a filter to return all applications with health state Error and another filter to always include applications of a specified application type."]
-    #[serde(rename = "ApplicationFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ApplicationFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_filters: Vec<ApplicationHealthStateFilter>,
     #[doc = "Defines a health policy used to evaluate the health of the cluster or of a cluster node."]
     #[serde(rename = "ClusterHealthPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -3765,7 +3844,12 @@ pub struct ClusterLoadInfo {
     #[serde(rename = "LastBalancingEndTimeUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_balancing_end_time_utc: Option<time::OffsetDateTime>,
     #[doc = "List that contains metrics and their load information in this cluster."]
-    #[serde(rename = "LoadMetricInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "LoadMetricInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_metric_information: Vec<LoadMetricInformation>,
 }
 impl ClusterLoadInfo {
@@ -4569,42 +4653,87 @@ pub struct ContainerCodePackageProperties {
     #[serde(rename = "entryPoint", default, skip_serializing_if = "Option::is_none")]
     pub entry_point: Option<String>,
     #[doc = "Command array to execute within the container in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub commands: Vec<String>,
     #[doc = "The environment variables to set in this container"]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The settings to set in this container. The setting file path can be fetched from environment variable \"Fabric_SettingPath\". The path for Windows container is \"C:\\\\secrets\". The path for Linux container is \"/var/secrets\"."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub settings: Vec<Setting>,
     #[doc = "The labels to set in this container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<ContainerLabel>,
     #[doc = "The endpoints exposed by this container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointProperties>,
     #[doc = "This type describes the resource requirements for a container or a service."]
     pub resources: ResourceRequirements,
     #[doc = "Volumes to be attached to the container. The lifetime of these volumes is independent of the application's lifetime."]
-    #[serde(rename = "volumeRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_refs: Vec<VolumeReference>,
     #[doc = "Volumes to be attached to the container. The lifetime of these volumes is scoped to the application's lifetime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volumes: Vec<ApplicationScopedVolume>,
     #[doc = "Reference to sinks in DiagnosticsDescription."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub diagnostics: Option<DiagnosticsRef>,
     #[doc = "A list of ReliableCollection resources used by this particular code package. Please refer to ReliableCollectionsRef for more details."]
-    #[serde(rename = "reliableCollectionsRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reliableCollectionsRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reliable_collections_refs: Vec<ReliableCollectionsRef>,
     #[doc = "Runtime information of a container instance."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<ContainerInstanceView>,
     #[doc = "An array of liveness probes for a code package. It determines when to restart a code package."]
-    #[serde(rename = "livenessProbe", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "livenessProbe",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub liveness_probe: Vec<Probe>,
     #[doc = "An array of readiness probes for a code package. It determines when to unpublish an endpoint."]
-    #[serde(rename = "readinessProbe", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "readinessProbe",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub readiness_probe: Vec<Probe>,
 }
 impl ContainerCodePackageProperties {
@@ -4682,7 +4811,11 @@ pub struct ContainerInstanceView {
     #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
     pub previous_state: Option<ContainerState>,
     #[doc = "The events of this container instance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<ContainerEvent>,
 }
 impl ContainerInstanceView {
@@ -5124,7 +5257,12 @@ impl DeployedApplicationHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeployedApplicationHealthStateChunkList {
     #[doc = "The list of deployed application health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<DeployedApplicationHealthStateChunk>,
 }
 impl DeployedApplicationHealthStateChunkList {
@@ -5142,7 +5280,12 @@ pub struct DeployedApplicationHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which deployed service packages to be included in the returned cluster health chunk as children of the parent deployed application. The deployed service packages are returned only if the parent deployed application matches a filter.\nIf the list is empty, no deployed service packages are returned. All the deployed service packages are used to evaluate the parent deployed application aggregated health state, regardless of the input filters.\nThe deployed application filter may specify multiple deployed service package filters.\nFor example, it can specify a filter to return all deployed service packages with health state Error and another filter to always include a deployed service package on a node."]
-    #[serde(rename = "DeployedServicePackageFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "DeployedServicePackageFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployed_service_package_filters: Vec<DeployedServicePackageHealthStateFilter>,
 }
 impl DeployedApplicationHealthStateFilter {
@@ -5531,7 +5674,12 @@ impl DeployedServicePackageHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeployedServicePackageHealthStateChunkList {
     #[doc = "The list of deployed service package health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<DeployedServicePackageHealthStateChunk>,
 }
 impl DeployedServicePackageHealthStateChunkList {
@@ -5948,13 +6096,22 @@ impl Serialize for DeploymentStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticsDescription {
     #[doc = "List of supported sinks that can be referenced."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sinks: Vec<DiagnosticsSinkProperties>,
     #[doc = "Status of whether or not sinks are enabled."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "The sinks to be used if diagnostics is enabled. Sink choices can be overridden at the service and code package level."]
-    #[serde(rename = "defaultSinkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultSinkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_sink_refs: Vec<String>,
 }
 impl DiagnosticsDescription {
@@ -5969,7 +6126,12 @@ pub struct DiagnosticsRef {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "List of sinks to be used if enabled. References the list of sinks in DiagnosticsDescription."]
-    #[serde(rename = "sinkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sinkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sink_refs: Vec<String>,
 }
 impl DiagnosticsRef {
@@ -6170,7 +6332,12 @@ pub struct EntityHealth {
     #[serde(rename = "AggregatedHealthState", default, skip_serializing_if = "Option::is_none")]
     pub aggregated_health_state: Option<HealthState>,
     #[doc = "The list of health events reported on the entity."]
-    #[serde(rename = "HealthEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "HealthEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_events: Vec<HealthEvent>,
     #[doc = "List of health evaluations that resulted in the current aggregated health state."]
     #[serde(rename = "UnhealthyEvaluations", default, skip_serializing_if = "Option::is_none")]
@@ -6436,7 +6603,12 @@ pub struct ExecutingFaultsChaosEvent {
     #[serde(flatten)]
     pub chaos_event: ChaosEvent,
     #[doc = "List of string description of the faults that Chaos decided to execute in an iteration."]
-    #[serde(rename = "Faults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Faults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub faults: Vec<String>,
 }
 impl ExecutingFaultsChaosEvent {
@@ -7528,10 +7700,18 @@ pub struct GatewayProperties {
     #[serde(rename = "destinationNetwork")]
     pub destination_network: NetworkRef,
     #[doc = "Configuration for tcp connectivity for this gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tcp: Vec<TcpConfig>,
     #[doc = "Configuration for http connectivity for this gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http: Vec<HttpConfig>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7898,7 +8078,12 @@ impl HealthStateCount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthStatistics {
     #[doc = "List of health state counts per entity kind, which keeps track of how many children of the queried entity are in Ok, Warning and Error state."]
-    #[serde(rename = "HealthStateCountList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "HealthStateCountList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_state_count_list: Vec<EntityKindHealthStateCount>,
 }
 impl HealthStatistics {
@@ -8154,7 +8339,11 @@ pub struct HttpRouteMatchRule {
     #[doc = "Path to match for routing."]
     pub path: HttpRouteMatchPath,
     #[doc = "headers and their values to match in request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<HttpRouteMatchHeader>,
 }
 impl HttpRouteMatchRule {
@@ -8279,10 +8468,20 @@ impl Default for ImageRegistryPasswordType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImageStoreContent {
     #[doc = "The list of image store file info objects represents files found under the given image store relative path."]
-    #[serde(rename = "StoreFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "StoreFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub store_files: Vec<FileInfo>,
     #[doc = "The list of image store folder info objects represents subfolders found under the given image store relative path."]
-    #[serde(rename = "StoreFolders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "StoreFolders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub store_folders: Vec<FolderInfo>,
 }
 impl ImageStoreContent {
@@ -8300,7 +8499,12 @@ pub struct ImageStoreCopyDescription {
     #[serde(rename = "RemoteDestination")]
     pub remote_destination: String,
     #[doc = "The list of the file names to be skipped for copying."]
-    #[serde(rename = "SkipFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SkipFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skip_files: Vec<String>,
     #[doc = "Indicates whether to check mark file during copying. The property is true if checking mark file is required, false otherwise. The mark file is used to check whether the folder is well constructed. If the property is true and mark file does not exist, the copy is skipped."]
     #[serde(rename = "CheckMarkFile", default, skip_serializing_if = "Option::is_none")]
@@ -8651,7 +8855,12 @@ pub struct LoadedPartitionInformationResultList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of application information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<LoadedPartitionInformationResult>,
 }
 impl LoadedPartitionInformationResultList {
@@ -8964,7 +9173,12 @@ pub struct NetworkRef {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of endpoints that are exposed on this network."]
-    #[serde(rename = "endpointRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_refs: Vec<EndpointRef>,
 }
 impl NetworkRef {
@@ -9553,7 +9767,12 @@ pub struct NodeHealthStateChunkList {
     #[serde(flatten)]
     pub entity_health_state_chunk_list: EntityHealthStateChunkList,
     #[doc = "The list of node health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<NodeHealthStateChunk>,
 }
 impl NodeHealthStateChunkList {
@@ -9726,7 +9945,12 @@ pub struct NodeLoadInfo {
     #[serde(rename = "NodeName", default, skip_serializing_if = "Option::is_none")]
     pub node_name: Option<NodeName>,
     #[doc = "List that contains metrics and their load information on this node."]
-    #[serde(rename = "NodeLoadMetricInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeLoadMetricInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_load_metric_information: Vec<NodeLoadMetricInformation>,
 }
 impl NodeLoadInfo {
@@ -10003,7 +10227,12 @@ pub struct NodeRepairImpactDescription {
     #[serde(flatten)]
     pub repair_impact_description_base: RepairImpactDescriptionBase,
     #[doc = "The list of nodes impacted by a repair action and their respective expected impact."]
-    #[serde(rename = "NodeImpactList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeImpactList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_impact_list: Vec<NodeImpact>,
 }
 impl NodeRepairImpactDescription {
@@ -10020,7 +10249,12 @@ pub struct NodeRepairTargetDescription {
     #[serde(flatten)]
     pub repair_target_description_base: RepairTargetDescriptionBase,
     #[doc = "The list of nodes targeted by a repair action."]
-    #[serde(rename = "NodeNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_names: Vec<String>,
 }
 impl NodeRepairTargetDescription {
@@ -10549,7 +10783,12 @@ pub struct PagedApplicationInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of application information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationInfo>,
 }
 impl PagedApplicationInfoList {
@@ -10564,7 +10803,12 @@ pub struct PagedApplicationResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationResourceDescription>,
 }
 impl PagedApplicationResourceDescriptionList {
@@ -10579,7 +10823,12 @@ pub struct PagedApplicationTypeInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of application type information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationTypeInfo>,
 }
 impl PagedApplicationTypeInfoList {
@@ -10594,7 +10843,12 @@ pub struct PagedBackupConfigurationInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of backup configuration information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupConfigurationInfo>,
 }
 impl PagedBackupConfigurationInfoList {
@@ -10609,7 +10863,12 @@ pub struct PagedBackupEntityList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of backup entity information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupEntity>,
 }
 impl PagedBackupEntityList {
@@ -10624,7 +10883,12 @@ pub struct PagedBackupInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of backup information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupInfo>,
 }
 impl PagedBackupInfoList {
@@ -10639,7 +10903,12 @@ pub struct PagedBackupPolicyDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "The list of backup policies information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupPolicyDescription>,
 }
 impl PagedBackupPolicyDescriptionList {
@@ -10654,7 +10923,12 @@ pub struct PagedComposeDeploymentStatusInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of compose deployment status information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ComposeDeploymentStatusInfo>,
 }
 impl PagedComposeDeploymentStatusInfoList {
@@ -10669,7 +10943,12 @@ pub struct PagedDeployedApplicationInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of deployed application information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<DeployedApplicationInfo>,
 }
 impl PagedDeployedApplicationInfoList {
@@ -10684,7 +10963,12 @@ pub struct PagedGatewayResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<GatewayResourceDescription>,
 }
 impl PagedGatewayResourceDescriptionList {
@@ -10699,7 +10983,12 @@ pub struct PagedNetworkResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<NetworkResourceDescription>,
 }
 impl PagedNetworkResourceDescriptionList {
@@ -10714,7 +11003,12 @@ pub struct PagedNodeInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of node information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<NodeInfo>,
 }
 impl PagedNodeInfoList {
@@ -10732,7 +11026,12 @@ pub struct PagedPropertyInfoList {
     #[serde(rename = "IsConsistent", default, skip_serializing_if = "Option::is_none")]
     pub is_consistent: Option<bool>,
     #[doc = "List of property information."]
-    #[serde(rename = "Properties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Properties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub properties: Vec<PropertyInfo>,
 }
 impl PagedPropertyInfoList {
@@ -10747,7 +11046,12 @@ pub struct PagedReplicaInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of replica information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ReplicaInfo>,
 }
 impl PagedReplicaInfoList {
@@ -10762,7 +11066,12 @@ pub struct PagedSecretResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<SecretResourceDescription>,
 }
 impl PagedSecretResourceDescriptionList {
@@ -10777,7 +11086,12 @@ pub struct PagedSecretValueResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<SecretValueResourceDescription>,
 }
 impl PagedSecretValueResourceDescriptionList {
@@ -10792,7 +11106,12 @@ pub struct PagedServiceInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of service information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceInfo>,
 }
 impl PagedServiceInfoList {
@@ -10807,7 +11126,12 @@ pub struct PagedServicePartitionInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of service partition information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServicePartitionInfo>,
 }
 impl PagedServicePartitionInfoList {
@@ -10822,7 +11146,12 @@ pub struct PagedServiceReplicaDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of service resource replica description."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceReplicaDescription>,
 }
 impl PagedServiceReplicaDescriptionList {
@@ -10837,7 +11166,12 @@ pub struct PagedServiceResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceResourceDescription>,
 }
 impl PagedServiceResourceDescriptionList {
@@ -10855,7 +11189,12 @@ pub struct PagedSubNameInfoList {
     #[serde(rename = "IsConsistent", default, skip_serializing_if = "Option::is_none")]
     pub is_consistent: Option<bool>,
     #[doc = "List of the child names."]
-    #[serde(rename = "SubNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SubNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_names: Vec<FabricName>,
 }
 impl PagedSubNameInfoList {
@@ -10870,7 +11209,12 @@ pub struct PagedUpdatePartitionLoadResultList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of partition load update information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<UpdatePartitionLoadResult>,
 }
 impl PagedUpdatePartitionLoadResultList {
@@ -10885,7 +11229,12 @@ pub struct PagedVolumeResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<VolumeResourceDescription>,
 }
 impl PagedVolumeResourceDescriptionList {
@@ -11034,7 +11383,12 @@ pub struct PartitionHealth {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "The list of replica health states associated with the partition."]
-    #[serde(rename = "ReplicaHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ReplicaHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_health_states: Vec<ReplicaHealthState>,
 }
 impl PartitionHealth {
@@ -11153,7 +11507,12 @@ impl PartitionHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartitionHealthStateChunkList {
     #[doc = "The list of partition health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<PartitionHealthStateChunk>,
 }
 impl PartitionHealthStateChunkList {
@@ -11171,7 +11530,12 @@ pub struct PartitionHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which replicas to be included in the returned cluster health chunk as children of the parent partition. The replicas are returned only if the parent partition matches a filter.\nIf the list is empty, no replicas are returned. All the replicas are used to evaluate the parent partition aggregated health state, regardless of the input filters.\nThe partition filter may specify multiple replica filters.\nFor example, it can specify a filter to return all replicas with health state Error and another filter to always include a replica identified by its replica id."]
-    #[serde(rename = "ReplicaFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ReplicaFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_filters: Vec<ReplicaHealthStateFilter>,
 }
 impl PartitionHealthStateFilter {
@@ -11235,13 +11599,28 @@ pub struct PartitionLoadInformation {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "Array of load reports from the primary replica for this partition."]
-    #[serde(rename = "PrimaryLoadMetricReports", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PrimaryLoadMetricReports",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub primary_load_metric_reports: Vec<LoadMetricReport>,
     #[doc = "Array of aggregated load reports from all secondary replicas for this partition.\nArray only contains the latest reported load for each metric."]
-    #[serde(rename = "SecondaryLoadMetricReports", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SecondaryLoadMetricReports",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secondary_load_metric_reports: Vec<LoadMetricReport>,
     #[doc = "Array of aggregated load reports from all auxiliary replicas for this partition.\nArray only contains the latest reported load for each metric."]
-    #[serde(rename = "AuxiliaryLoadMetricReports", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "AuxiliaryLoadMetricReports",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auxiliary_load_metric_reports: Vec<LoadMetricReport>,
 }
 impl PartitionLoadInformation {
@@ -11256,23 +11635,44 @@ pub struct PartitionMetricLoadDescription {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "Partition's load information for primary replica, in case partition is from a stateful service."]
-    #[serde(rename = "PrimaryReplicaLoadEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PrimaryReplicaLoadEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub primary_replica_load_entries: Vec<MetricLoadDescription>,
     #[doc = "Partition's load information for all secondary replicas or instances."]
-    #[serde(rename = "SecondaryReplicasOrInstancesLoadEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SecondaryReplicasOrInstancesLoadEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secondary_replicas_or_instances_load_entries: Vec<MetricLoadDescription>,
     #[doc = "Partition's load information for a specific secondary replica or instance located on a specific node."]
     #[serde(
         rename = "SecondaryReplicaOrInstanceLoadEntriesPerNode",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub secondary_replica_or_instance_load_entries_per_node: Vec<ReplicaMetricLoadDescription>,
     #[doc = "Partition's load information for all auxiliary replicas."]
-    #[serde(rename = "AuxiliaryReplicasLoadEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "AuxiliaryReplicasLoadEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auxiliary_replicas_load_entries: Vec<MetricLoadDescription>,
     #[doc = "Partition's load information for a specific auxiliary replica located on a specific node."]
-    #[serde(rename = "AuxiliaryReplicaLoadEntriesPerNode", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "AuxiliaryReplicaLoadEntriesPerNode",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auxiliary_replica_load_entries_per_node: Vec<ReplicaMetricLoadDescription>,
 }
 impl PartitionMetricLoadDescription {
@@ -11662,7 +12062,12 @@ pub struct ProbeHttpGet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub host: Option<String>,
     #[doc = "Headers to set in the request."]
-    #[serde(rename = "httpHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_headers: Vec<ProbeHttpGetHeaders>,
     #[doc = "Scheme for the http probe. Can be Http or Https."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11749,7 +12154,12 @@ impl ProbeTcpSocket {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PropertyBatchDescriptionList {
     #[doc = "A list of the property batch operations to be executed."]
-    #[serde(rename = "Operations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Operations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<PropertyBatchOperation>,
 }
 impl PropertyBatchDescriptionList {
@@ -12914,7 +13324,12 @@ impl ReplicaHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicaHealthStateChunkList {
     #[doc = "The list of replica health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ReplicaHealthStateChunk>,
 }
 impl ReplicaHealthStateChunkList {
@@ -13036,7 +13451,12 @@ pub struct ReplicaMetricLoadDescription {
     #[serde(rename = "NodeName", default, skip_serializing_if = "Option::is_none")]
     pub node_name: Option<String>,
     #[doc = "Loads of a different metrics for a partition's secondary replica or instance."]
-    #[serde(rename = "ReplicaOrInstanceLoadEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ReplicaOrInstanceLoadEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_or_instance_load_entries: Vec<MetricLoadDescription>,
 }
 impl ReplicaMetricLoadDescription {
@@ -14657,7 +15077,12 @@ pub struct ServiceHealth {
     #[serde(rename = "Name", default, skip_serializing_if = "Option::is_none")]
     pub name: Option<ServiceName>,
     #[doc = "The list of partition health states associated with the service."]
-    #[serde(rename = "PartitionHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PartitionHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_health_states: Vec<PartitionHealthState>,
 }
 impl ServiceHealth {
@@ -14781,7 +15206,12 @@ impl ServiceHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceHealthStateChunkList {
     #[doc = "The list of service health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceHealthStateChunk>,
 }
 impl ServiceHealthStateChunkList {
@@ -14799,7 +15229,12 @@ pub struct ServiceHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which partitions to be included in the returned cluster health chunk as children of the service. The partitions are returned only if the parent service matches a filter.\nIf the list is empty, no partitions are returned. All the partitions are used to evaluate the parent service aggregated health state, regardless of the input filters.\nThe service filter may specify multiple partition filters.\nFor example, it can specify a filter to return all partitions with health state Error and another filter to always include a partition identified by its partition ID."]
-    #[serde(rename = "PartitionFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PartitionFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_filters: Vec<PartitionHealthStateFilter>,
 }
 impl ServiceHealthStateFilter {
@@ -15430,7 +15865,12 @@ pub struct ServiceProperties {
     #[serde(rename = "executionPolicy", default, skip_serializing_if = "Option::is_none")]
     pub execution_policy: Option<ExecutionPolicy>,
     #[doc = "Auto scaling policies"]
-    #[serde(rename = "autoScalingPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "autoScalingPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auto_scaling_policies: Vec<AutoScalingPolicy>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -15445,7 +15885,12 @@ pub struct ServiceProperties {
     #[serde(rename = "unhealthyEvaluation", default, skip_serializing_if = "Option::is_none")]
     pub unhealthy_evaluation: Option<String>,
     #[doc = "The service identity list."]
-    #[serde(rename = "identityRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "identityRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identity_refs: Vec<ServiceIdentity>,
     #[doc = "Dns name of the service."]
     #[serde(rename = "dnsName", default, skip_serializing_if = "Option::is_none")]
@@ -15483,7 +15928,12 @@ pub struct ServiceReplicaProperties {
     #[serde(rename = "codePackages")]
     pub code_packages: Vec<ContainerCodePackageProperties>,
     #[doc = "The names of the private networks that this service needs to be part of."]
-    #[serde(rename = "networkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_refs: Vec<NetworkRef>,
     #[doc = "Reference to sinks in DiagnosticsDescription."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -16838,7 +17288,12 @@ pub struct UnplacedReplicaInformation {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "List of reasons due to which a replica cannot be placed."]
-    #[serde(rename = "UnplacedReplicaDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "UnplacedReplicaDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unplaced_replica_details: Vec<String>,
 }
 impl UnplacedReplicaInformation {
@@ -17371,7 +17826,12 @@ impl UploadChunkRange {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UploadSession {
     #[doc = "When querying upload session by upload session ID, the result contains only one upload session. When querying upload session by image store relative path, the result might contain multiple upload sessions."]
-    #[serde(rename = "UploadSessions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "UploadSessions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upload_sessions: Vec<UploadSessionInfo>,
 }
 impl UploadSession {
@@ -17395,7 +17855,12 @@ pub struct UploadSessionInfo {
     #[serde(rename = "FileSize", default, skip_serializing_if = "Option::is_none")]
     pub file_size: Option<String>,
     #[doc = "List of chunk ranges that image store has not received yet."]
-    #[serde(rename = "ExpectedRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ExpectedRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub expected_ranges: Vec<UploadChunkRange>,
 }
 impl UploadSessionInfo {
diff --git a/services/svc/servicefabric/src/v8_2/models.rs b/services/svc/servicefabric/src/v8_2/models.rs
index 68d395a4f6..e4633154c2 100644
--- a/services/svc/servicefabric/src/v8_2/models.rs
+++ b/services/svc/servicefabric/src/v8_2/models.rs
@@ -395,10 +395,20 @@ pub struct ApplicationHealth {
     #[serde(rename = "Name", default, skip_serializing_if = "Option::is_none")]
     pub name: Option<ApplicationName>,
     #[doc = "Service health states as found in the health store."]
-    #[serde(rename = "ServiceHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ServiceHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_health_states: Vec<ServiceHealthState>,
     #[doc = "Deployed application health states as found in the health store."]
-    #[serde(rename = "DeployedApplicationHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "DeployedApplicationHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployed_application_health_states: Vec<DeployedApplicationHealthState>,
 }
 impl ApplicationHealth {
@@ -595,7 +605,12 @@ pub struct ApplicationHealthStateChunkList {
     #[serde(flatten)]
     pub entity_health_state_chunk_list: EntityHealthStateChunkList,
     #[doc = "The list of application health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationHealthStateChunk>,
 }
 impl ApplicationHealthStateChunkList {
@@ -616,10 +631,20 @@ pub struct ApplicationHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which services to be included in the returned cluster health chunk as children of the application. The services are returned only if the parent application matches a filter.\nIf the list is empty, no services are returned. All the services are used to evaluate the parent application aggregated health state, regardless of the input filters.\nThe application filter may specify multiple service filters.\nFor example, it can specify a filter to return all services with health state Error and another filter to always include a service identified by its service name."]
-    #[serde(rename = "ServiceFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ServiceFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_filters: Vec<ServiceHealthStateFilter>,
     #[doc = "Defines a list of filters that specify which deployed applications to be included in the returned cluster health chunk as children of the application. The deployed applications are returned only if the parent application matches a filter.\nIf the list is empty, no deployed applications are returned. All the deployed applications are used to evaluate the parent application aggregated health state, regardless of the input filters.\nThe application filter may specify multiple deployed application filters.\nFor example, it can specify a filter to return all deployed applications with health state Error and another filter to always include a deployed application on a specified node."]
-    #[serde(rename = "DeployedApplicationFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "DeployedApplicationFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployed_application_filters: Vec<DeployedApplicationHealthStateFilter>,
 }
 impl ApplicationHealthStateFilter {
@@ -947,7 +972,11 @@ pub struct ApplicationProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Describes the services in the application. This property is used to create or modify services of the application. On get only the name of the service is returned. The service description can be obtained by querying for the service resource."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub services: Vec<ServiceResourceDescription>,
     #[doc = "Describes the diagnostics options available"]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -956,7 +985,12 @@ pub struct ApplicationProperties {
     #[serde(rename = "debugParams", default, skip_serializing_if = "Option::is_none")]
     pub debug_params: Option<String>,
     #[doc = "Names of the services in the application."]
-    #[serde(rename = "serviceNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "serviceNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub service_names: Vec<String>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -3208,10 +3242,20 @@ pub struct ChaosSchedule {
     #[serde(rename = "ExpiryDate", default, with = "azure_core::date::rfc3339::option")]
     pub expiry_date: Option<time::OffsetDateTime>,
     #[doc = "A mapping of string names to Chaos Parameters to be referenced by Chaos Schedule Jobs."]
-    #[serde(rename = "ChaosParametersDictionary", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ChaosParametersDictionary",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub chaos_parameters_dictionary: Vec<ChaosParametersDictionaryItem>,
     #[doc = "A list of all Chaos Schedule Jobs that will be automated by the schedule."]
-    #[serde(rename = "Jobs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Jobs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jobs: Vec<ChaosScheduleJob>,
 }
 impl ChaosSchedule {
@@ -3244,7 +3288,12 @@ pub struct ChaosScheduleJob {
     #[serde(rename = "Days", default, skip_serializing_if = "Option::is_none")]
     pub days: Option<ChaosScheduleJobActiveDaysOfWeek>,
     #[doc = "A list of Time Ranges that specify when during active days that this job will run. The times are interpreted as UTC."]
-    #[serde(rename = "Times", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Times",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub times: Vec<TimeRange>,
 }
 impl ChaosScheduleJob {
@@ -3447,10 +3496,20 @@ impl ChaosStoppedEvent {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ChaosTargetFilter {
     #[doc = "A list of node types to include in Chaos faults.\nAll types of faults (restart node, restart code package, remove replica, restart replica, move primary, and move secondary) are enabled for the nodes of these node types.\nIf a node type (say NodeTypeX) does not appear in the NodeTypeInclusionList, then node level faults (like NodeRestart) will never be enabled for the nodes of\nNodeTypeX, but code package and replica faults can still be enabled for NodeTypeX if an application in the ApplicationInclusionList.\nhappens to reside on a node of NodeTypeX.\nAt most 100 node type names can be included in this list, to increase this number, a config upgrade is required for MaxNumberOfNodeTypesInChaosEntityFilter configuration."]
-    #[serde(rename = "NodeTypeInclusionList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeTypeInclusionList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_type_inclusion_list: Vec<NodeType>,
     #[doc = "A list of application URIs to include in Chaos faults.\nAll replicas belonging to services of these applications are amenable to replica faults (restart replica, remove replica, move primary, and move secondary) by Chaos.\nChaos may restart a code package only if the code package hosts replicas of these applications only.\nIf an application does not appear in this list, it can still be faulted in some Chaos iteration if the application ends up on a node of a node type that is included in NodeTypeInclusionList.\nHowever, if applicationX is tied to nodeTypeY through placement constraints and applicationX is absent from ApplicationInclusionList and nodeTypeY is absent from NodeTypeInclusionList, then applicationX will never be faulted.\nAt most 1000 application names can be included in this list, to increase this number, a config upgrade is required for MaxNumberOfApplicationsInChaosEntityFilter configuration."]
-    #[serde(rename = "ApplicationInclusionList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ApplicationInclusionList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_inclusion_list: Vec<ApplicationName>,
 }
 impl ChaosTargetFilter {
@@ -3620,10 +3679,20 @@ pub struct ClusterHealth {
     #[serde(flatten)]
     pub entity_health: EntityHealth,
     #[doc = "Cluster node health states as found in the health store."]
-    #[serde(rename = "NodeHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_health_states: Vec<NodeHealthState>,
     #[doc = "Cluster application health states as found in the health store."]
-    #[serde(rename = "ApplicationHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ApplicationHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_health_states: Vec<ApplicationHealthState>,
 }
 impl ClusterHealth {
@@ -3653,10 +3722,20 @@ impl ClusterHealthChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ClusterHealthChunkQueryDescription {
     #[doc = "Defines a list of filters that specify which nodes to be included in the returned cluster health chunk.\nIf no filters are specified, no nodes are returned. All the nodes are used to evaluate the cluster's aggregated health state, regardless of the input filters.\nThe cluster health chunk query may specify multiple node filters.\nFor example, it can specify a filter to return all nodes with health state Error and another filter to always include a node identified by its NodeName."]
-    #[serde(rename = "NodeFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_filters: Vec<NodeHealthStateFilter>,
     #[doc = "Defines a list of filters that specify which applications to be included in the returned cluster health chunk.\nIf no filters are specified, no applications are returned. All the applications are used to evaluate the cluster's aggregated health state, regardless of the input filters.\nThe cluster health chunk query may specify multiple application filters.\nFor example, it can specify a filter to return all applications with health state Error and another filter to always include applications of a specified application type."]
-    #[serde(rename = "ApplicationFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ApplicationFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub application_filters: Vec<ApplicationHealthStateFilter>,
     #[doc = "Defines a health policy used to evaluate the health of the cluster or of a cluster node."]
     #[serde(rename = "ClusterHealthPolicy", default, skip_serializing_if = "Option::is_none")]
@@ -3774,7 +3853,12 @@ pub struct ClusterLoadInfo {
     #[serde(rename = "LastBalancingEndTimeUtc", default, with = "azure_core::date::rfc3339::option")]
     pub last_balancing_end_time_utc: Option<time::OffsetDateTime>,
     #[doc = "List that contains metrics and their load information in this cluster."]
-    #[serde(rename = "LoadMetricInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "LoadMetricInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub load_metric_information: Vec<LoadMetricInformation>,
 }
 impl ClusterLoadInfo {
@@ -4587,42 +4671,87 @@ pub struct ContainerCodePackageProperties {
     #[serde(rename = "entryPoint", default, skip_serializing_if = "Option::is_none")]
     pub entry_point: Option<String>,
     #[doc = "Command array to execute within the container in exec form."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub commands: Vec<String>,
     #[doc = "The environment variables to set in this container"]
-    #[serde(rename = "environmentVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "environmentVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub environment_variables: Vec<EnvironmentVariable>,
     #[doc = "The settings to set in this container. The setting file path can be fetched from environment variable \"Fabric_SettingPath\". The path for Windows container is \"C:\\\\secrets\". The path for Linux container is \"/var/secrets\"."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub settings: Vec<Setting>,
     #[doc = "The labels to set in this container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub labels: Vec<ContainerLabel>,
     #[doc = "The endpoints exposed by this container."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<EndpointProperties>,
     #[doc = "This type describes the resource requirements for a container or a service."]
     pub resources: ResourceRequirements,
     #[doc = "Volumes to be attached to the container. The lifetime of these volumes is independent of the application's lifetime."]
-    #[serde(rename = "volumeRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "volumeRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volume_refs: Vec<VolumeReference>,
     #[doc = "Volumes to be attached to the container. The lifetime of these volumes is scoped to the application's lifetime."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub volumes: Vec<ApplicationScopedVolume>,
     #[doc = "Reference to sinks in DiagnosticsDescription."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub diagnostics: Option<DiagnosticsRef>,
     #[doc = "A list of ReliableCollection resources used by this particular code package. Please refer to ReliableCollectionsRef for more details."]
-    #[serde(rename = "reliableCollectionsRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "reliableCollectionsRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub reliable_collections_refs: Vec<ReliableCollectionsRef>,
     #[doc = "Runtime information of a container instance."]
     #[serde(rename = "instanceView", default, skip_serializing_if = "Option::is_none")]
     pub instance_view: Option<ContainerInstanceView>,
     #[doc = "An array of liveness probes for a code package. It determines when to restart a code package."]
-    #[serde(rename = "livenessProbe", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "livenessProbe",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub liveness_probe: Vec<Probe>,
     #[doc = "An array of readiness probes for a code package. It determines when to unpublish an endpoint."]
-    #[serde(rename = "readinessProbe", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "readinessProbe",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub readiness_probe: Vec<Probe>,
 }
 impl ContainerCodePackageProperties {
@@ -4700,7 +4829,11 @@ pub struct ContainerInstanceView {
     #[serde(rename = "previousState", default, skip_serializing_if = "Option::is_none")]
     pub previous_state: Option<ContainerState>,
     #[doc = "The events of this container instance."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<ContainerEvent>,
 }
 impl ContainerInstanceView {
@@ -5158,7 +5291,12 @@ impl DeployedApplicationHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeployedApplicationHealthStateChunkList {
     #[doc = "The list of deployed application health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<DeployedApplicationHealthStateChunk>,
 }
 impl DeployedApplicationHealthStateChunkList {
@@ -5176,7 +5314,12 @@ pub struct DeployedApplicationHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which deployed service packages to be included in the returned cluster health chunk as children of the parent deployed application. The deployed service packages are returned only if the parent deployed application matches a filter.\nIf the list is empty, no deployed service packages are returned. All the deployed service packages are used to evaluate the parent deployed application aggregated health state, regardless of the input filters.\nThe deployed application filter may specify multiple deployed service package filters.\nFor example, it can specify a filter to return all deployed service packages with health state Error and another filter to always include a deployed service package on a node."]
-    #[serde(rename = "DeployedServicePackageFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "DeployedServicePackageFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub deployed_service_package_filters: Vec<DeployedServicePackageHealthStateFilter>,
 }
 impl DeployedApplicationHealthStateFilter {
@@ -5568,7 +5711,12 @@ impl DeployedServicePackageHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DeployedServicePackageHealthStateChunkList {
     #[doc = "The list of deployed service package health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<DeployedServicePackageHealthStateChunk>,
 }
 impl DeployedServicePackageHealthStateChunkList {
@@ -5985,13 +6133,22 @@ impl Serialize for DeploymentStatus {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiagnosticsDescription {
     #[doc = "List of supported sinks that can be referenced."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sinks: Vec<DiagnosticsSinkProperties>,
     #[doc = "Status of whether or not sinks are enabled."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "The sinks to be used if diagnostics is enabled. Sink choices can be overridden at the service and code package level."]
-    #[serde(rename = "defaultSinkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "defaultSinkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub default_sink_refs: Vec<String>,
 }
 impl DiagnosticsDescription {
@@ -6006,7 +6163,12 @@ pub struct DiagnosticsRef {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub enabled: Option<bool>,
     #[doc = "List of sinks to be used if enabled. References the list of sinks in DiagnosticsDescription."]
-    #[serde(rename = "sinkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "sinkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sink_refs: Vec<String>,
 }
 impl DiagnosticsRef {
@@ -6207,7 +6369,12 @@ pub struct EntityHealth {
     #[serde(rename = "AggregatedHealthState", default, skip_serializing_if = "Option::is_none")]
     pub aggregated_health_state: Option<HealthState>,
     #[doc = "The list of health events reported on the entity."]
-    #[serde(rename = "HealthEvents", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "HealthEvents",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_events: Vec<HealthEvent>,
     #[doc = "List of health evaluations that resulted in the current aggregated health state."]
     #[serde(rename = "UnhealthyEvaluations", default, skip_serializing_if = "Option::is_none")]
@@ -6473,7 +6640,12 @@ pub struct ExecutingFaultsChaosEvent {
     #[serde(flatten)]
     pub chaos_event: ChaosEvent,
     #[doc = "List of string description of the faults that Chaos decided to execute in an iteration."]
-    #[serde(rename = "Faults", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Faults",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub faults: Vec<String>,
 }
 impl ExecutingFaultsChaosEvent {
@@ -7565,10 +7737,18 @@ pub struct GatewayProperties {
     #[serde(rename = "destinationNetwork")]
     pub destination_network: NetworkRef,
     #[doc = "Configuration for tcp connectivity for this gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub tcp: Vec<TcpConfig>,
     #[doc = "Configuration for http connectivity for this gateway."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http: Vec<HttpConfig>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -7935,7 +8115,12 @@ impl HealthStateCount {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HealthStatistics {
     #[doc = "List of health state counts per entity kind, which keeps track of how many children of the queried entity are in Ok, Warning and Error state."]
-    #[serde(rename = "HealthStateCountList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "HealthStateCountList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub health_state_count_list: Vec<EntityKindHealthStateCount>,
 }
 impl HealthStatistics {
@@ -8191,7 +8376,11 @@ pub struct HttpRouteMatchRule {
     #[doc = "Path to match for routing."]
     pub path: HttpRouteMatchPath,
     #[doc = "headers and their values to match in request."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub headers: Vec<HttpRouteMatchHeader>,
 }
 impl HttpRouteMatchRule {
@@ -8316,10 +8505,20 @@ impl Default for ImageRegistryPasswordType {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ImageStoreContent {
     #[doc = "The list of image store file info objects represents files found under the given image store relative path."]
-    #[serde(rename = "StoreFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "StoreFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub store_files: Vec<FileInfo>,
     #[doc = "The list of image store folder info objects represents subfolders found under the given image store relative path."]
-    #[serde(rename = "StoreFolders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "StoreFolders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub store_folders: Vec<FolderInfo>,
 }
 impl ImageStoreContent {
@@ -8337,7 +8536,12 @@ pub struct ImageStoreCopyDescription {
     #[serde(rename = "RemoteDestination")]
     pub remote_destination: String,
     #[doc = "The list of the file names to be skipped for copying."]
-    #[serde(rename = "SkipFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SkipFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub skip_files: Vec<String>,
     #[doc = "Indicates whether to check mark file during copying. The property is true if checking mark file is required, false otherwise. The mark file is used to check whether the folder is well constructed. If the property is true and mark file does not exist, the copy is skipped."]
     #[serde(rename = "CheckMarkFile", default, skip_serializing_if = "Option::is_none")]
@@ -8688,7 +8892,12 @@ pub struct LoadedPartitionInformationResultList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of application information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<LoadedPartitionInformationResult>,
 }
 impl LoadedPartitionInformationResultList {
@@ -9001,7 +9210,12 @@ pub struct NetworkRef {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub name: Option<String>,
     #[doc = "A list of endpoints that are exposed on this network."]
-    #[serde(rename = "endpointRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "endpointRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoint_refs: Vec<EndpointRef>,
 }
 impl NetworkRef {
@@ -9590,7 +9804,12 @@ pub struct NodeHealthStateChunkList {
     #[serde(flatten)]
     pub entity_health_state_chunk_list: EntityHealthStateChunkList,
     #[doc = "The list of node health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<NodeHealthStateChunk>,
 }
 impl NodeHealthStateChunkList {
@@ -9769,7 +9988,12 @@ pub struct NodeLoadInfo {
     #[serde(rename = "NodeName", default, skip_serializing_if = "Option::is_none")]
     pub node_name: Option<NodeName>,
     #[doc = "List that contains metrics and their load information on this node."]
-    #[serde(rename = "NodeLoadMetricInformation", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeLoadMetricInformation",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_load_metric_information: Vec<NodeLoadMetricInformation>,
 }
 impl NodeLoadInfo {
@@ -10046,7 +10270,12 @@ pub struct NodeRepairImpactDescription {
     #[serde(flatten)]
     pub repair_impact_description_base: RepairImpactDescriptionBase,
     #[doc = "The list of nodes impacted by a repair action and their respective expected impact."]
-    #[serde(rename = "NodeImpactList", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeImpactList",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_impact_list: Vec<NodeImpact>,
 }
 impl NodeRepairImpactDescription {
@@ -10063,7 +10292,12 @@ pub struct NodeRepairTargetDescription {
     #[serde(flatten)]
     pub repair_target_description_base: RepairTargetDescriptionBase,
     #[doc = "The list of nodes targeted by a repair action."]
-    #[serde(rename = "NodeNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "NodeNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub node_names: Vec<String>,
 }
 impl NodeRepairTargetDescription {
@@ -10596,7 +10830,12 @@ pub struct PagedApplicationInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of application information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationInfo>,
 }
 impl PagedApplicationInfoList {
@@ -10611,7 +10850,12 @@ pub struct PagedApplicationResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationResourceDescription>,
 }
 impl PagedApplicationResourceDescriptionList {
@@ -10626,7 +10870,12 @@ pub struct PagedApplicationTypeInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of application type information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ApplicationTypeInfo>,
 }
 impl PagedApplicationTypeInfoList {
@@ -10641,7 +10890,12 @@ pub struct PagedBackupConfigurationInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of backup configuration information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupConfigurationInfo>,
 }
 impl PagedBackupConfigurationInfoList {
@@ -10656,7 +10910,12 @@ pub struct PagedBackupEntityList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of backup entity information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupEntity>,
 }
 impl PagedBackupEntityList {
@@ -10671,7 +10930,12 @@ pub struct PagedBackupInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of backup information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupInfo>,
 }
 impl PagedBackupInfoList {
@@ -10686,7 +10950,12 @@ pub struct PagedBackupPolicyDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "The list of backup policies information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<BackupPolicyDescription>,
 }
 impl PagedBackupPolicyDescriptionList {
@@ -10701,7 +10970,12 @@ pub struct PagedComposeDeploymentStatusInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of compose deployment status information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ComposeDeploymentStatusInfo>,
 }
 impl PagedComposeDeploymentStatusInfoList {
@@ -10716,7 +10990,12 @@ pub struct PagedDeployedApplicationInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of deployed application information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<DeployedApplicationInfo>,
 }
 impl PagedDeployedApplicationInfoList {
@@ -10731,7 +11010,12 @@ pub struct PagedGatewayResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<GatewayResourceDescription>,
 }
 impl PagedGatewayResourceDescriptionList {
@@ -10746,7 +11030,12 @@ pub struct PagedNetworkResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<NetworkResourceDescription>,
 }
 impl PagedNetworkResourceDescriptionList {
@@ -10761,7 +11050,12 @@ pub struct PagedNodeInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of node information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<NodeInfo>,
 }
 impl PagedNodeInfoList {
@@ -10779,7 +11073,12 @@ pub struct PagedPropertyInfoList {
     #[serde(rename = "IsConsistent", default, skip_serializing_if = "Option::is_none")]
     pub is_consistent: Option<bool>,
     #[doc = "List of property information."]
-    #[serde(rename = "Properties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Properties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub properties: Vec<PropertyInfo>,
 }
 impl PagedPropertyInfoList {
@@ -10794,7 +11093,12 @@ pub struct PagedReplicaInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of replica information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ReplicaInfo>,
 }
 impl PagedReplicaInfoList {
@@ -10809,7 +11113,12 @@ pub struct PagedSecretResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<SecretResourceDescription>,
 }
 impl PagedSecretResourceDescriptionList {
@@ -10824,7 +11133,12 @@ pub struct PagedSecretValueResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<SecretValueResourceDescription>,
 }
 impl PagedSecretValueResourceDescriptionList {
@@ -10839,7 +11153,12 @@ pub struct PagedServiceInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of service information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceInfo>,
 }
 impl PagedServiceInfoList {
@@ -10854,7 +11173,12 @@ pub struct PagedServicePartitionInfoList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of service partition information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServicePartitionInfo>,
 }
 impl PagedServicePartitionInfoList {
@@ -10869,7 +11193,12 @@ pub struct PagedServiceReplicaDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of service resource replica description."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceReplicaDescription>,
 }
 impl PagedServiceReplicaDescriptionList {
@@ -10884,7 +11213,12 @@ pub struct PagedServiceResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceResourceDescription>,
 }
 impl PagedServiceResourceDescriptionList {
@@ -10902,7 +11236,12 @@ pub struct PagedSubNameInfoList {
     #[serde(rename = "IsConsistent", default, skip_serializing_if = "Option::is_none")]
     pub is_consistent: Option<bool>,
     #[doc = "List of the child names."]
-    #[serde(rename = "SubNames", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SubNames",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sub_names: Vec<FabricName>,
 }
 impl PagedSubNameInfoList {
@@ -10917,7 +11256,12 @@ pub struct PagedUpdatePartitionLoadResultList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "List of partition load update information."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<UpdatePartitionLoadResult>,
 }
 impl PagedUpdatePartitionLoadResultList {
@@ -10932,7 +11276,12 @@ pub struct PagedVolumeResourceDescriptionList {
     #[serde(rename = "ContinuationToken", default, skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<ContinuationToken>,
     #[doc = "One page of the list."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<VolumeResourceDescription>,
 }
 impl PagedVolumeResourceDescriptionList {
@@ -11081,7 +11430,12 @@ pub struct PartitionHealth {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "The list of replica health states associated with the partition."]
-    #[serde(rename = "ReplicaHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ReplicaHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_health_states: Vec<ReplicaHealthState>,
 }
 impl PartitionHealth {
@@ -11200,7 +11554,12 @@ impl PartitionHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PartitionHealthStateChunkList {
     #[doc = "The list of partition health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<PartitionHealthStateChunk>,
 }
 impl PartitionHealthStateChunkList {
@@ -11218,7 +11577,12 @@ pub struct PartitionHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which replicas to be included in the returned cluster health chunk as children of the parent partition. The replicas are returned only if the parent partition matches a filter.\nIf the list is empty, no replicas are returned. All the replicas are used to evaluate the parent partition aggregated health state, regardless of the input filters.\nThe partition filter may specify multiple replica filters.\nFor example, it can specify a filter to return all replicas with health state Error and another filter to always include a replica identified by its replica id."]
-    #[serde(rename = "ReplicaFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ReplicaFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_filters: Vec<ReplicaHealthStateFilter>,
 }
 impl PartitionHealthStateFilter {
@@ -11282,13 +11646,28 @@ pub struct PartitionLoadInformation {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "Array of load reports from the primary replica for this partition."]
-    #[serde(rename = "PrimaryLoadMetricReports", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PrimaryLoadMetricReports",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub primary_load_metric_reports: Vec<LoadMetricReport>,
     #[doc = "Array of aggregated load reports from all secondary replicas for this partition.\nArray only contains the latest reported load for each metric."]
-    #[serde(rename = "SecondaryLoadMetricReports", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SecondaryLoadMetricReports",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secondary_load_metric_reports: Vec<LoadMetricReport>,
     #[doc = "Array of aggregated load reports from all auxiliary replicas for this partition.\nArray only contains the latest reported load for each metric."]
-    #[serde(rename = "AuxiliaryLoadMetricReports", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "AuxiliaryLoadMetricReports",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auxiliary_load_metric_reports: Vec<LoadMetricReport>,
 }
 impl PartitionLoadInformation {
@@ -11303,23 +11682,44 @@ pub struct PartitionMetricLoadDescription {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "Partition's load information for primary replica, in case partition is from a stateful service."]
-    #[serde(rename = "PrimaryReplicaLoadEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PrimaryReplicaLoadEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub primary_replica_load_entries: Vec<MetricLoadDescription>,
     #[doc = "Partition's load information for all secondary replicas or instances."]
-    #[serde(rename = "SecondaryReplicasOrInstancesLoadEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "SecondaryReplicasOrInstancesLoadEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub secondary_replicas_or_instances_load_entries: Vec<MetricLoadDescription>,
     #[doc = "Partition's load information for a specific secondary replica or instance located on a specific node."]
     #[serde(
         rename = "SecondaryReplicaOrInstanceLoadEntriesPerNode",
         default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
         skip_serializing_if = "Vec::is_empty"
     )]
     pub secondary_replica_or_instance_load_entries_per_node: Vec<ReplicaMetricLoadDescription>,
     #[doc = "Partition's load information for all auxiliary replicas."]
-    #[serde(rename = "AuxiliaryReplicasLoadEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "AuxiliaryReplicasLoadEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auxiliary_replicas_load_entries: Vec<MetricLoadDescription>,
     #[doc = "Partition's load information for a specific auxiliary replica located on a specific node."]
-    #[serde(rename = "AuxiliaryReplicaLoadEntriesPerNode", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "AuxiliaryReplicaLoadEntriesPerNode",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auxiliary_replica_load_entries_per_node: Vec<ReplicaMetricLoadDescription>,
 }
 impl PartitionMetricLoadDescription {
@@ -11709,7 +12109,12 @@ pub struct ProbeHttpGet {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub host: Option<String>,
     #[doc = "Headers to set in the request."]
-    #[serde(rename = "httpHeaders", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "httpHeaders",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub http_headers: Vec<ProbeHttpGetHeaders>,
     #[doc = "Scheme for the http probe. Can be Http or Https."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -11796,7 +12201,12 @@ impl ProbeTcpSocket {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PropertyBatchDescriptionList {
     #[doc = "A list of the property batch operations to be executed."]
-    #[serde(rename = "Operations", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Operations",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub operations: Vec<PropertyBatchOperation>,
 }
 impl PropertyBatchDescriptionList {
@@ -12961,7 +13371,12 @@ impl ReplicaHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ReplicaHealthStateChunkList {
     #[doc = "The list of replica health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ReplicaHealthStateChunk>,
 }
 impl ReplicaHealthStateChunkList {
@@ -13083,7 +13498,12 @@ pub struct ReplicaMetricLoadDescription {
     #[serde(rename = "NodeName", default, skip_serializing_if = "Option::is_none")]
     pub node_name: Option<String>,
     #[doc = "Loads of a different metrics for a partition's secondary replica or instance."]
-    #[serde(rename = "ReplicaOrInstanceLoadEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ReplicaOrInstanceLoadEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub replica_or_instance_load_entries: Vec<MetricLoadDescription>,
 }
 impl ReplicaMetricLoadDescription {
@@ -14704,7 +15124,12 @@ pub struct ServiceHealth {
     #[serde(rename = "Name", default, skip_serializing_if = "Option::is_none")]
     pub name: Option<ServiceName>,
     #[doc = "The list of partition health states associated with the service."]
-    #[serde(rename = "PartitionHealthStates", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PartitionHealthStates",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_health_states: Vec<PartitionHealthState>,
 }
 impl ServiceHealth {
@@ -14828,7 +15253,12 @@ impl ServiceHealthStateChunk {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ServiceHealthStateChunkList {
     #[doc = "The list of service health state chunks that respect the input filters in the chunk query."]
-    #[serde(rename = "Items", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "Items",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub items: Vec<ServiceHealthStateChunk>,
 }
 impl ServiceHealthStateChunkList {
@@ -14846,7 +15276,12 @@ pub struct ServiceHealthStateFilter {
     #[serde(rename = "HealthStateFilter", default, skip_serializing_if = "Option::is_none")]
     pub health_state_filter: Option<i64>,
     #[doc = "Defines a list of filters that specify which partitions to be included in the returned cluster health chunk as children of the service. The partitions are returned only if the parent service matches a filter.\nIf the list is empty, no partitions are returned. All the partitions are used to evaluate the parent service aggregated health state, regardless of the input filters.\nThe service filter may specify multiple partition filters.\nFor example, it can specify a filter to return all partitions with health state Error and another filter to always include a partition identified by its partition ID."]
-    #[serde(rename = "PartitionFilters", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "PartitionFilters",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub partition_filters: Vec<PartitionHealthStateFilter>,
 }
 impl ServiceHealthStateFilter {
@@ -15520,7 +15955,12 @@ pub struct ServiceProperties {
     #[serde(rename = "executionPolicy", default, skip_serializing_if = "Option::is_none")]
     pub execution_policy: Option<ExecutionPolicy>,
     #[doc = "Auto scaling policies"]
-    #[serde(rename = "autoScalingPolicies", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "autoScalingPolicies",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub auto_scaling_policies: Vec<AutoScalingPolicy>,
     #[doc = "Status of the resource."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -15535,7 +15975,12 @@ pub struct ServiceProperties {
     #[serde(rename = "unhealthyEvaluation", default, skip_serializing_if = "Option::is_none")]
     pub unhealthy_evaluation: Option<String>,
     #[doc = "The service identity list."]
-    #[serde(rename = "identityRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "identityRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub identity_refs: Vec<ServiceIdentity>,
     #[doc = "Dns name of the service."]
     #[serde(rename = "dnsName", default, skip_serializing_if = "Option::is_none")]
@@ -15573,7 +16018,12 @@ pub struct ServiceReplicaProperties {
     #[serde(rename = "codePackages")]
     pub code_packages: Vec<ContainerCodePackageProperties>,
     #[doc = "The names of the private networks that this service needs to be part of."]
-    #[serde(rename = "networkRefs", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "networkRefs",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub network_refs: Vec<NetworkRef>,
     #[doc = "Reference to sinks in DiagnosticsDescription."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -16928,7 +17378,12 @@ pub struct UnplacedReplicaInformation {
     #[serde(rename = "PartitionId", default, skip_serializing_if = "Option::is_none")]
     pub partition_id: Option<PartitionId>,
     #[doc = "List of reasons due to which a replica cannot be placed."]
-    #[serde(rename = "UnplacedReplicaDetails", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "UnplacedReplicaDetails",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub unplaced_replica_details: Vec<String>,
 }
 impl UnplacedReplicaInformation {
@@ -17523,7 +17978,12 @@ impl UploadChunkRange {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct UploadSession {
     #[doc = "When querying upload session by upload session ID, the result contains only one upload session. When querying upload session by image store relative path, the result might contain multiple upload sessions."]
-    #[serde(rename = "UploadSessions", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "UploadSessions",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub upload_sessions: Vec<UploadSessionInfo>,
 }
 impl UploadSession {
@@ -17547,7 +18007,12 @@ pub struct UploadSessionInfo {
     #[serde(rename = "FileSize", default, skip_serializing_if = "Option::is_none")]
     pub file_size: Option<String>,
     #[doc = "List of chunk ranges that image store has not received yet."]
-    #[serde(rename = "ExpectedRanges", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ExpectedRanges",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub expected_ranges: Vec<UploadChunkRange>,
 }
 impl UploadSessionInfo {
diff --git a/services/svc/storagedatalake/src/package_2020_06/models.rs b/services/svc/storagedatalake/src/package_2020_06/models.rs
index adef971bab..3faa51390f 100644
--- a/services/svc/storagedatalake/src/package_2020_06/models.rs
+++ b/services/svc/storagedatalake/src/package_2020_06/models.rs
@@ -19,7 +19,12 @@ impl AclFailedEntry {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct BlobHierarchyListSegment {
-    #[serde(rename = "BlobPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "BlobPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_prefixes: Vec<BlobPrefix>,
     #[serde(rename = "BlobItems")]
     pub blob_items: Vec<BlobItemInternal>,
@@ -192,7 +197,11 @@ impl FileSystem {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileSystemList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filesystems: Vec<FileSystem>,
 }
 impl azure_core::Continuable for FileSystemList {
@@ -276,7 +285,11 @@ impl Path {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PathList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<Path>,
 }
 impl azure_core::Continuable for PathList {
@@ -298,7 +311,12 @@ pub struct SetAccessControlRecursiveResponse {
     pub files_successful: Option<i32>,
     #[serde(rename = "failureCount", default, skip_serializing_if = "Option::is_none")]
     pub failure_count: Option<i32>,
-    #[serde(rename = "failedEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "failedEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub failed_entries: Vec<AclFailedEntry>,
 }
 impl SetAccessControlRecursiveResponse {
diff --git a/services/svc/storagedatalake/src/package_2020_10/models.rs b/services/svc/storagedatalake/src/package_2020_10/models.rs
index 471272ecc9..6cb6a8a799 100644
--- a/services/svc/storagedatalake/src/package_2020_10/models.rs
+++ b/services/svc/storagedatalake/src/package_2020_10/models.rs
@@ -19,7 +19,12 @@ impl AclFailedEntry {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct BlobHierarchyListSegment {
-    #[serde(rename = "BlobPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "BlobPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_prefixes: Vec<BlobPrefix>,
     #[serde(rename = "BlobItems")]
     pub blob_items: Vec<BlobItemInternal>,
@@ -192,7 +197,11 @@ impl FileSystem {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileSystemList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filesystems: Vec<FileSystem>,
 }
 impl azure_core::Continuable for FileSystemList {
@@ -279,7 +288,11 @@ impl Path {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PathList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<Path>,
 }
 impl azure_core::Continuable for PathList {
@@ -301,7 +314,12 @@ pub struct SetAccessControlRecursiveResponse {
     pub files_successful: Option<i32>,
     #[serde(rename = "failureCount", default, skip_serializing_if = "Option::is_none")]
     pub failure_count: Option<i32>,
-    #[serde(rename = "failedEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "failedEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub failed_entries: Vec<AclFailedEntry>,
 }
 impl SetAccessControlRecursiveResponse {
diff --git a/services/svc/storagedatalake/src/package_2021_04/models.rs b/services/svc/storagedatalake/src/package_2021_04/models.rs
index 471272ecc9..6cb6a8a799 100644
--- a/services/svc/storagedatalake/src/package_2021_04/models.rs
+++ b/services/svc/storagedatalake/src/package_2021_04/models.rs
@@ -19,7 +19,12 @@ impl AclFailedEntry {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct BlobHierarchyListSegment {
-    #[serde(rename = "BlobPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "BlobPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_prefixes: Vec<BlobPrefix>,
     #[serde(rename = "BlobItems")]
     pub blob_items: Vec<BlobItemInternal>,
@@ -192,7 +197,11 @@ impl FileSystem {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileSystemList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filesystems: Vec<FileSystem>,
 }
 impl azure_core::Continuable for FileSystemList {
@@ -279,7 +288,11 @@ impl Path {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PathList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<Path>,
 }
 impl azure_core::Continuable for PathList {
@@ -301,7 +314,12 @@ pub struct SetAccessControlRecursiveResponse {
     pub files_successful: Option<i32>,
     #[serde(rename = "failureCount", default, skip_serializing_if = "Option::is_none")]
     pub failure_count: Option<i32>,
-    #[serde(rename = "failedEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "failedEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub failed_entries: Vec<AclFailedEntry>,
 }
 impl SetAccessControlRecursiveResponse {
diff --git a/services/svc/storagedatalake/src/package_2021_06/models.rs b/services/svc/storagedatalake/src/package_2021_06/models.rs
index 471272ecc9..6cb6a8a799 100644
--- a/services/svc/storagedatalake/src/package_2021_06/models.rs
+++ b/services/svc/storagedatalake/src/package_2021_06/models.rs
@@ -19,7 +19,12 @@ impl AclFailedEntry {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct BlobHierarchyListSegment {
-    #[serde(rename = "BlobPrefixes", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "BlobPrefixes",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub blob_prefixes: Vec<BlobPrefix>,
     #[serde(rename = "BlobItems")]
     pub blob_items: Vec<BlobItemInternal>,
@@ -192,7 +197,11 @@ impl FileSystem {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct FileSystemList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub filesystems: Vec<FileSystem>,
 }
 impl azure_core::Continuable for FileSystemList {
@@ -279,7 +288,11 @@ impl Path {
 }
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PathList {
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub paths: Vec<Path>,
 }
 impl azure_core::Continuable for PathList {
@@ -301,7 +314,12 @@ pub struct SetAccessControlRecursiveResponse {
     pub files_successful: Option<i32>,
     #[serde(rename = "failureCount", default, skip_serializing_if = "Option::is_none")]
     pub failure_count: Option<i32>,
-    #[serde(rename = "failedEntries", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "failedEntries",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub failed_entries: Vec<AclFailedEntry>,
 }
 impl SetAccessControlRecursiveResponse {
diff --git a/services/svc/synapse/src/package_spark_2019_11_01_preview/models.rs b/services/svc/synapse/src/package_spark_2019_11_01_preview/models.rs
index c22155c8a8..193d8ff089 100644
--- a/services/svc/synapse/src/package_spark_2019_11_01_preview/models.rs
+++ b/services/svc/synapse/src/package_spark_2019_11_01_preview/models.rs
@@ -36,7 +36,12 @@ pub struct SparkBatchJob {
     #[serde(rename = "pluginInfo", default, skip_serializing_if = "Option::is_none")]
     pub plugin_info: Option<SparkServicePlugin>,
     #[doc = "The error information."]
-    #[serde(rename = "errorInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_info: Vec<SparkServiceError>,
     #[doc = "The tags."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -53,7 +58,11 @@ pub struct SparkBatchJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<String>,
     #[doc = "The log lines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log: Vec<String>,
 }
 impl SparkBatchJob {
@@ -169,7 +178,11 @@ pub struct SparkBatchJobCollection {
     #[doc = "Number of sessions fetched."]
     pub total: i32,
     #[doc = "Batch list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sessions: Vec<SparkBatchJob>,
 }
 impl SparkBatchJobCollection {
@@ -191,15 +204,36 @@ pub struct SparkBatchJobOptions {
     pub file: String,
     #[serde(rename = "className", default, skip_serializing_if = "Option::is_none")]
     pub class_name: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub args: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jars: Vec<String>,
-    #[serde(rename = "pyFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pyFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub py_files: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub archives: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub conf: Option<serde_json::Value>,
@@ -278,15 +312,36 @@ pub struct SparkRequest {
     pub file: Option<String>,
     #[serde(rename = "className", default, skip_serializing_if = "Option::is_none")]
     pub class_name: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub args: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jars: Vec<String>,
-    #[serde(rename = "pyFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pyFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub py_files: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub archives: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub conf: Option<serde_json::Value>,
@@ -515,7 +570,12 @@ pub struct SparkSession {
     pub scheduler_info: Option<SparkScheduler>,
     #[serde(rename = "pluginInfo", default, skip_serializing_if = "Option::is_none")]
     pub plugin_info: Option<SparkServicePlugin>,
-    #[serde(rename = "errorInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_info: Vec<SparkServiceError>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<serde_json::Value>,
@@ -526,7 +586,11 @@ pub struct SparkSession {
     pub app_info: Option<serde_json::Value>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log: Vec<String>,
 }
 impl SparkSession {
@@ -636,7 +700,11 @@ pub mod spark_session {
 pub struct SparkSessionCollection {
     pub from: i32,
     pub total: i32,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sessions: Vec<SparkSession>,
 }
 impl SparkSessionCollection {
@@ -659,15 +727,36 @@ pub struct SparkSessionOptions {
     pub file: Option<String>,
     #[serde(rename = "className", default, skip_serializing_if = "Option::is_none")]
     pub class_name: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub args: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jars: Vec<String>,
-    #[serde(rename = "pyFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pyFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub py_files: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub archives: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub conf: Option<serde_json::Value>,
@@ -768,7 +857,11 @@ impl SparkStatementCancellationResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct SparkStatementCollection {
     pub total_statements: i32,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statements: Vec<SparkStatement>,
 }
 impl SparkStatementCollection {
@@ -849,7 +942,11 @@ pub struct SparkStatementOutput {
     pub ename: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub evalue: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traceback: Vec<String>,
 }
 impl SparkStatementOutput {
diff --git a/services/svc/synapse/src/package_spark_2020_12_01/models.rs b/services/svc/synapse/src/package_spark_2020_12_01/models.rs
index ed4551444f..a82fb6b190 100644
--- a/services/svc/synapse/src/package_spark_2020_12_01/models.rs
+++ b/services/svc/synapse/src/package_spark_2020_12_01/models.rs
@@ -36,7 +36,12 @@ pub struct SparkBatchJob {
     #[serde(rename = "pluginInfo", default, skip_serializing_if = "Option::is_none")]
     pub plugin_info: Option<SparkServicePlugin>,
     #[doc = "The error information."]
-    #[serde(rename = "errorInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_info: Vec<SparkServiceError>,
     #[doc = "The tags."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -53,7 +58,11 @@ pub struct SparkBatchJob {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<spark_batch_job::State>,
     #[doc = "The log lines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log: Vec<String>,
 }
 impl SparkBatchJob {
@@ -235,7 +244,11 @@ pub struct SparkBatchJobCollection {
     #[doc = "Number of sessions fetched."]
     pub total: i32,
     #[doc = "Batch list"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sessions: Vec<SparkBatchJob>,
 }
 impl SparkBatchJobCollection {
@@ -257,15 +270,36 @@ pub struct SparkBatchJobOptions {
     pub file: String,
     #[serde(rename = "className", default, skip_serializing_if = "Option::is_none")]
     pub class_name: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub args: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jars: Vec<String>,
-    #[serde(rename = "pyFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pyFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub py_files: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub archives: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub conf: Option<serde_json::Value>,
@@ -344,15 +378,36 @@ pub struct SparkRequest {
     pub file: Option<String>,
     #[serde(rename = "className", default, skip_serializing_if = "Option::is_none")]
     pub class_name: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub args: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jars: Vec<String>,
-    #[serde(rename = "pyFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pyFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub py_files: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub archives: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub conf: Option<serde_json::Value>,
@@ -581,7 +636,12 @@ pub struct SparkSession {
     pub scheduler_info: Option<SparkScheduler>,
     #[serde(rename = "pluginInfo", default, skip_serializing_if = "Option::is_none")]
     pub plugin_info: Option<SparkServicePlugin>,
-    #[serde(rename = "errorInfo", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "errorInfo",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub error_info: Vec<SparkServiceError>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub tags: Option<serde_json::Value>,
@@ -593,7 +653,11 @@ pub struct SparkSession {
     #[doc = "The session state."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state: Option<spark_session::State>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub log: Vec<String>,
 }
 impl SparkSession {
@@ -769,7 +833,11 @@ pub mod spark_session {
 pub struct SparkSessionCollection {
     pub from: i32,
     pub total: i32,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sessions: Vec<SparkSession>,
 }
 impl SparkSessionCollection {
@@ -792,15 +860,36 @@ pub struct SparkSessionOptions {
     pub file: Option<String>,
     #[serde(rename = "className", default, skip_serializing_if = "Option::is_none")]
     pub class_name: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub args: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub jars: Vec<String>,
-    #[serde(rename = "pyFiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "pyFiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub py_files: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub files: Vec<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub archives: Vec<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub conf: Option<serde_json::Value>,
@@ -954,7 +1043,11 @@ impl SparkStatementCancellationResult {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct SparkStatementCollection {
     pub total_statements: i32,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub statements: Vec<SparkStatement>,
 }
 impl SparkStatementCollection {
@@ -1035,7 +1128,11 @@ pub struct SparkStatementOutput {
     pub ename: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub evalue: Option<String>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub traceback: Vec<String>,
 }
 impl SparkStatementOutput {
diff --git a/services/svc/synapse/src/package_vnet_2019_06_01_preview/models.rs b/services/svc/synapse/src/package_vnet_2019_06_01_preview/models.rs
index d3988993e3..54463f2981 100644
--- a/services/svc/synapse/src/package_vnet_2019_06_01_preview/models.rs
+++ b/services/svc/synapse/src/package_vnet_2019_06_01_preview/models.rs
@@ -46,7 +46,11 @@ impl ManagedPrivateEndpointConnectionState {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedPrivateEndpointListResponse {
     #[doc = "List of managed private endpoints"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedPrivateEndpoint>,
     #[doc = "The link to the next page of results, if any remaining results exist."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/synapse/src/package_vnet_2020_12_01/models.rs b/services/svc/synapse/src/package_vnet_2020_12_01/models.rs
index 5c17e872c3..9573463f72 100644
--- a/services/svc/synapse/src/package_vnet_2020_12_01/models.rs
+++ b/services/svc/synapse/src/package_vnet_2020_12_01/models.rs
@@ -46,7 +46,11 @@ impl ManagedPrivateEndpointConnectionState {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedPrivateEndpointListResponse {
     #[doc = "List of managed private endpoints"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedPrivateEndpoint>,
     #[doc = "The link to the next page of results, if any remaining results exist."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -85,7 +89,11 @@ pub struct ManagedPrivateEndpointProperties {
     #[serde(rename = "isReserved", default, skip_serializing_if = "Option::is_none")]
     pub is_reserved: Option<bool>,
     #[doc = "List of fully qualified domain names"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdns: Vec<String>,
     #[doc = "Denotes whether the managed private endpoint is compliant"]
     #[serde(rename = "isCompliant", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/synapse/src/package_vnet_2021_06_01_preview/models.rs b/services/svc/synapse/src/package_vnet_2021_06_01_preview/models.rs
index 5c17e872c3..9573463f72 100644
--- a/services/svc/synapse/src/package_vnet_2021_06_01_preview/models.rs
+++ b/services/svc/synapse/src/package_vnet_2021_06_01_preview/models.rs
@@ -46,7 +46,11 @@ impl ManagedPrivateEndpointConnectionState {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct ManagedPrivateEndpointListResponse {
     #[doc = "List of managed private endpoints"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<ManagedPrivateEndpoint>,
     #[doc = "The link to the next page of results, if any remaining results exist."]
     #[serde(rename = "nextLink", default, skip_serializing_if = "Option::is_none")]
@@ -85,7 +89,11 @@ pub struct ManagedPrivateEndpointProperties {
     #[serde(rename = "isReserved", default, skip_serializing_if = "Option::is_none")]
     pub is_reserved: Option<bool>,
     #[doc = "List of fully qualified domain names"]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub fqdns: Vec<String>,
     #[doc = "Denotes whether the managed private endpoint is compliant"]
     #[serde(rename = "isCompliant", default, skip_serializing_if = "Option::is_none")]
diff --git a/services/svc/timeseriesinsights/src/package_2020_07_31/models.rs b/services/svc/timeseriesinsights/src/package_2020_07_31/models.rs
index abf3e8d646..c0b3b7fa28 100644
--- a/services/svc/timeseriesinsights/src/package_2020_07_31/models.rs
+++ b/services/svc/timeseriesinsights/src/package_2020_07_31/models.rs
@@ -18,7 +18,12 @@ pub struct AggregateSeries {
     #[doc = "Interval size is specified in ISO-8601 duration format. All intervals are the same size. One month is always converted to 30 days, and one year is always 365 days. Examples: 1 minute is \"PT1M\", 1 millisecond is \"PT0.001S\". For more information, see https://www.w3.org/TR/xmlschema-2/#duration"]
     pub interval: String,
     #[doc = "This allows the user to optionally select the variables that needs to be projected. When it is null or not set, all the variables from inlineVariables and model are returned. Can be null."]
-    #[serde(rename = "projectedVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "projectedVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub projected_variables: Vec<String>,
     #[doc = "This allows the user the optionally define inline-variables apart from the ones already defined in the model. When the inline variable names have the same name as the model, the inline variable definition takes precedence. Can be null."]
     #[serde(rename = "inlineVariables", default, skip_serializing_if = "Option::is_none")]
@@ -88,7 +93,11 @@ pub struct CategoricalVariable {
     #[doc = "The interpolation operation to be performed on the raw data points. Currently, only sampling of interpolated time series is allowed. Allowed aggregate function - eg: left($value). Can be null if no interpolation needs to be applied."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub interpolation: Option<Interpolation>,
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub categories: Vec<TimeSeriesAggregateCategory>,
     #[doc = "Represents the default category."]
     #[serde(rename = "defaultCategory")]
@@ -139,7 +148,11 @@ impl EventProperty {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct EventSchema {
     #[doc = "A set of property definitions. When environment has no data, the returned array is empty."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub properties: Vec<EventProperty>,
 }
 impl EventSchema {
@@ -172,7 +185,12 @@ pub struct GetEvents {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub filter: Option<Tsx>,
     #[doc = "Projected properties is an array of properties which you want to project. These properties must appear in the events; otherwise, they are not returned."]
-    #[serde(rename = "projectedProperties", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "projectedProperties",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub projected_properties: Vec<EventProperty>,
     #[doc = "Maximum number of property values in the whole response set, not the maximum number of property values per page. Defaults to 10,000 when not set. Maximum value of take can be 250,000."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -195,7 +213,11 @@ pub struct GetHierarchiesPage {
     #[serde(flatten)]
     pub paged_response: PagedResponse,
     #[doc = "Partial list of time series hierarchies returned in a single request. Can be empty if server was unable to fill the page in this request, or there is no more objects when continuation token is null."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hierarchies: Vec<TimeSeriesHierarchy>,
 }
 impl GetHierarchiesPage {
@@ -209,7 +231,11 @@ pub struct GetInstancesPage {
     #[serde(flatten)]
     pub paged_response: PagedResponse,
     #[doc = "Partial list of time series instances returned in a single request. Can be empty if server was unable to fill the page in this request, or there is no more objects when continuation token is null."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub instances: Vec<TimeSeriesInstance>,
 }
 impl GetInstancesPage {
@@ -230,7 +256,12 @@ pub struct GetSeries {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub filter: Option<Tsx>,
     #[doc = "Selected variables that needs to be projected in the query result. When it is null or not set, all the variables from inlineVariables and time series type in the model are returned. Can be null."]
-    #[serde(rename = "projectedVariables", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "projectedVariables",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub projected_variables: Vec<String>,
     #[doc = "Optional inline variables apart from the ones already defined in the time series type in the model. When the inline variable name is the same name as in the model, the inline variable definition takes precedence. Can be null."]
     #[serde(rename = "inlineVariables", default, skip_serializing_if = "Option::is_none")]
@@ -257,7 +288,11 @@ pub struct GetTypesPage {
     #[serde(flatten)]
     pub paged_response: PagedResponse,
     #[doc = "Partial list of time series types returned in a single request. Can be empty if server was unable to fill the page with more types in this request, or there is no more types when continuation token is null."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub types: Vec<TimeSeriesType>,
 }
 impl GetTypesPage {
@@ -272,7 +307,11 @@ pub struct HierarchiesBatchRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub get: Option<HierarchiesRequestBatchGetDelete>,
     #[doc = "\"put\" should be set while creating or updating hierarchies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub put: Vec<TimeSeriesHierarchy>,
     #[doc = "Request to get or delete multiple time series hierarchies. Exactly one of \"hierarchyIds\" or \"names\" must be set."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -287,13 +326,25 @@ impl HierarchiesBatchRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HierarchiesBatchResponse {
     #[doc = "List of hierarchy or error objects corresponding by position to the \"get\" array in the request. Hierarchy object is set when operation is successful and error object is set when operation is unsuccessful."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub get: Vec<TimeSeriesHierarchyOrError>,
     #[doc = "List of hierarchy or error object corresponding by position to the \"put\" array in the request. Hierarchy object is set when operation is successful and error object is set when operation is unsuccessful."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub put: Vec<TimeSeriesHierarchyOrError>,
     #[doc = "List of error objects corresponding by position to the \"delete\" array in the request - null when the operation is successful."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delete: Vec<TsiErrorBody>,
 }
 impl HierarchiesBatchResponse {
@@ -357,10 +408,19 @@ pub mod hierarchies_expand_parameter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct HierarchiesRequestBatchGetDelete {
     #[doc = "List of hierarchy IDs."]
-    #[serde(rename = "hierarchyIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hierarchyIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hierarchy_ids: Vec<String>,
     #[doc = "List of hierarchy names."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub names: Vec<String>,
 }
 impl HierarchiesRequestBatchGetDelete {
@@ -451,7 +511,12 @@ pub struct InstanceHit {
     #[serde(rename = "typeId", default, skip_serializing_if = "Option::is_none")]
     pub type_id: Option<String>,
     #[doc = "List of time series hierarchy IDs that time series instance which matched the search request belongs to. Cannot be used to lookup hierarchies. May be null."]
-    #[serde(rename = "hierarchyIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hierarchyIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hierarchy_ids: Vec<String>,
     #[doc = "Highlighted text of time series instance to be displayed to the user. Highlighting inserts <hit> and </hit> tags in the portions of text that matched the search string. Do not use any of the highlighted properties to do further API calls."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -468,7 +533,12 @@ pub mod instance_hit {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Highlights {
         #[doc = "List of highlighted string values of Time Series ID for displaying. Cannot be used to lookup instance."]
-        #[serde(rename = "timeSeriesId", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "timeSeriesId",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub time_series_id: Vec<String>,
         #[doc = "Highlighted time series type name that this instance belongs to."]
         #[serde(rename = "typeName", default, skip_serializing_if = "Option::is_none")]
@@ -480,16 +550,36 @@ pub mod instance_hit {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         pub description: Option<String>,
         #[doc = "List of highlighted time series hierarchy IDs that time series instance belongs to. Cannot be used to lookup hierarchies. May be null."]
-        #[serde(rename = "hierarchyIds", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hierarchyIds",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub hierarchy_ids: Vec<String>,
         #[doc = "List of highlighted time series hierarchy names that time series instance belongs to. Cannot be used to lookup hierarchies. May be null."]
-        #[serde(rename = "hierarchyNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "hierarchyNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub hierarchy_names: Vec<String>,
         #[doc = "List of highlighted time series instance field names. May be null."]
-        #[serde(rename = "instanceFieldNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "instanceFieldNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub instance_field_names: Vec<String>,
         #[doc = "List of highlighted time series instance field values. May be null."]
-        #[serde(rename = "instanceFieldValues", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "instanceFieldValues",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub instance_field_values: Vec<String>,
     }
     impl Highlights {
@@ -520,10 +610,18 @@ pub struct InstancesBatchRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub get: Option<InstancesRequestBatchGetOrDelete>,
     #[doc = "Time series instances to be created or updated."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub put: Vec<TimeSeriesInstance>,
     #[doc = "Time series instance to be updated. If instance does not exist, an error is returned."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub update: Vec<TimeSeriesInstance>,
     #[doc = "Request to get or delete instances by time series IDs or time series names. Exactly one of \"timeSeriesIds\" or \"names\" must be set."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -538,16 +636,32 @@ impl InstancesBatchRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstancesBatchResponse {
     #[doc = "List of instance or error objects corresponding by position to the \"get\" array in the request. Instance object is set when operation is successful and error object is set when operation is unsuccessful."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub get: Vec<InstanceOrError>,
     #[doc = "List of error objects corresponding by position to the \"put\" array in the request. Error object is set when operation is unsuccessful."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub put: Vec<InstanceOrError>,
     #[doc = "List of error objects corresponding by position to the \"update\" array in the request. Instance object is set when operation is successful and error object is set when operation is unsuccessful."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub update: Vec<InstanceOrError>,
     #[doc = "List of error objects corresponding by position to the \"delete\" array in the request. Null means the instance has been deleted, or did not exist. Error object is set when operation is unsuccessful (e.g. when there are events associated with this time series instance)."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delete: Vec<TsiErrorBody>,
 }
 impl InstancesBatchResponse {
@@ -559,10 +673,19 @@ impl InstancesBatchResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstancesRequestBatchGetOrDelete {
     #[doc = "List of time series IDs of the time series instances to return or delete."]
-    #[serde(rename = "timeSeriesIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "timeSeriesIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub time_series_ids: Vec<TimeSeriesId>,
     #[doc = "List of names of the time series instances to return or delete."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub names: Vec<String>,
 }
 impl InstancesRequestBatchGetOrDelete {
@@ -656,7 +779,11 @@ impl InstancesSuggestRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct InstancesSuggestResponse {
     #[doc = "List of instance suggestions for searching time series models."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub suggestions: Vec<InstancesSearchStringSuggestion>,
 }
 impl InstancesSuggestResponse {
@@ -828,7 +955,11 @@ pub struct PropertyValues {
     #[serde(flatten)]
     pub event_property: EventProperty,
     #[doc = "Values of a single property corresponding to the timestamps. May contain nulls. Type of values matches the type of property."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub values: Vec<serde_json::Value>,
 }
 impl PropertyValues {
@@ -860,10 +991,18 @@ pub struct QueryResultPage {
     #[serde(flatten)]
     pub paged_response: PagedResponse,
     #[doc = "The timestamps of the values of the time series. If an aggregation over intervals is used, timestamps represent the start of corresponding intervals. If events are retrieved, timestamps are values of timestamp $ts property of events. Can be null if server was unable to fill the page in this request, or can be empty if there are no more objects when continuation token is null."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub timestamps: Vec<time::OffsetDateTime>,
     #[doc = "Collection of time series properties and values for each of the timestamps.  Can be null if server was unable to fill the page in this request, or can be empty if there are no more objects when continuation token is null."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub properties: Vec<PropertyValues>,
     #[doc = "Approximate progress of the query in percentage. It can be between 0 and 100. When the continuation token in the response is null, the progress is expected to be 100."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -878,7 +1017,11 @@ impl QueryResultPage {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SearchHierarchyNodesResponse {
     #[doc = "The list of hierarchy nodes which contains the instances matching the query based on the input. May be empty."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hits: Vec<HierarchyHit>,
     #[doc = "Total number of hierarchy nodes which contains the instances matching the query based on the input."]
     #[serde(rename = "hitCount", default, skip_serializing_if = "Option::is_none")]
@@ -938,7 +1081,11 @@ pub struct SearchInstancesRequest {
     #[serde(rename = "searchString")]
     pub search_string: String,
     #[doc = "Filter on hierarchy path of time series instances. Path is represented as array of string path segments. First element should be hierarchy name. Example: [\"Location\", \"California\"]. Optional, case sensitive, never empty and can be null."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub path: Vec<String>,
     #[doc = "Parameters of how to return time series instances by search instances call."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -961,7 +1108,11 @@ impl SearchInstancesRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct SearchInstancesResponse {
     #[doc = "The list of instances matching the query based on the input. May be empty."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hits: Vec<InstanceHit>,
     #[doc = "Total number of instances matching the query based on the input."]
     #[serde(rename = "hitCount", default, skip_serializing_if = "Option::is_none")]
@@ -1036,7 +1187,12 @@ pub mod time_series_hierarchy {
     #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
     pub struct Source {
         #[doc = "List of instance field names that must be set in all time series instances that belong to this hierarchy. The order of the instance fields defines the levels in the hierarchy."]
-        #[serde(rename = "instanceFieldNames", default, skip_serializing_if = "Vec::is_empty")]
+        #[serde(
+            rename = "instanceFieldNames",
+            default,
+            deserialize_with = "azure_core::util::deserialize_null_as_default",
+            skip_serializing_if = "Vec::is_empty"
+        )]
         pub instance_field_names: Vec<String>,
     }
     impl Source {
@@ -1131,7 +1287,12 @@ pub struct TimeSeriesInstance {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "Set of time series hierarchy IDs that the instance belong to. May be null."]
-    #[serde(rename = "hierarchyIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "hierarchyIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub hierarchy_ids: Vec<String>,
     #[doc = "Set of key-value pairs that contain user-defined instance properties. It may be null. Supported property value types are: bool, string, long, double and it cannot be nested or null."]
     #[serde(rename = "instanceFields", default, skip_serializing_if = "Option::is_none")]
@@ -1234,7 +1395,11 @@ pub struct TsiErrorBody {
     #[serde(rename = "innerError", default, skip_serializing_if = "Option::is_none")]
     pub inner_error: Box<Option<TsiErrorBody>>,
     #[doc = "Contains additional error information. May be null."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<TsiErrorDetails>,
 }
 impl TsiErrorBody {
@@ -1275,7 +1440,11 @@ pub struct TypesBatchRequest {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub get: Option<TypesRequestBatchGetOrDelete>,
     #[doc = "Definition of what time series types to update or create."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub put: Vec<TimeSeriesType>,
     #[doc = "Request to get or delete time series types by IDs or type names. Exactly one of \"typeIds\" or \"names\" must be set."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1290,13 +1459,25 @@ impl TypesBatchRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TypesBatchResponse {
     #[doc = "List of types or error objects corresponding by position to the \"get\" array in the request. Type object is set when operation is successful and error object is set when operation is unsuccessful."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub get: Vec<TimeSeriesTypeOrError>,
     #[doc = "List of types or error objects corresponding by position to the \"put\" array in the request. Type object is set when operation is successful and error object is set when operation is unsuccessful."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub put: Vec<TimeSeriesTypeOrError>,
     #[doc = "List of error objects corresponding by position to the \"delete\" array in the request - null when the operation is successful."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub delete: Vec<TsiErrorBody>,
 }
 impl TypesBatchResponse {
@@ -1308,10 +1489,19 @@ impl TypesBatchResponse {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct TypesRequestBatchGetOrDelete {
     #[doc = "List of IDs of time series types to return or delete."]
-    #[serde(rename = "typeIds", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "typeIds",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub type_ids: Vec<String>,
     #[doc = "List of names of time series types to return or delete."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub names: Vec<String>,
 }
 impl TypesRequestBatchGetOrDelete {
diff --git a/services/svc/videoanalyzer/src/package_ava_edge_1_0_0_preview/models.rs b/services/svc/videoanalyzer/src/package_ava_edge_1_0_0_preview/models.rs
index 822dfa739f..ea71f62cb4 100644
--- a/services/svc/videoanalyzer/src/package_ava_edge_1_0_0_preview/models.rs
+++ b/services/svc/videoanalyzer/src/package_ava_edge_1_0_0_preview/models.rs
@@ -538,7 +538,11 @@ impl LivePipelineActivateRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LivePipelineCollection {
     #[doc = "List of live pipelines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LivePipeline>,
     #[doc = "A continuation token to be used in subsequent calls when enumerating through the collection. This is returned when the collection results won't fit in a single response."]
     #[serde(rename = "@continuationToken", default, skip_serializing_if = "Option::is_none")]
@@ -609,7 +613,11 @@ pub struct LivePipelineProperties {
     #[serde(rename = "topologyName", default, skip_serializing_if = "Option::is_none")]
     pub topology_name: Option<String>,
     #[doc = "List of the instance level parameter values for the user-defined topology parameters. A pipeline can only define or override parameters values for parameters which have been declared in the referenced topology. Topology parameters without a default value must be defined. Topology parameters with a default value can be optionally be overridden."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ParameterDefinition>,
     #[doc = "Current pipeline state (read-only)."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -874,7 +882,12 @@ pub struct NodeInput {
     #[serde(rename = "nodeName")]
     pub node_name: String,
     #[doc = "Allows for the selection of specific data streams (eg. video only) from another node."]
-    #[serde(rename = "outputSelectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputSelectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_selectors: Vec<OutputSelector>,
 }
 impl NodeInput {
@@ -1174,7 +1187,11 @@ impl PipelineTopology {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PipelineTopologyCollection {
     #[doc = "List of pipeline topologies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PipelineTopology>,
     #[doc = "A continuation token to be used in subsequent calls when enumerating through the collection. This is returned when the collection results won't fit in a single response."]
     #[serde(rename = "@continuationToken", default, skip_serializing_if = "Option::is_none")]
@@ -1229,16 +1246,32 @@ pub struct PipelineTopologyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of the topology parameter declarations. Parameters declared here can be referenced throughout the topology nodes through the use of \"${PARAMETER_NAME}\" string pattern. Parameters can have optional default values and can later be defined in individual instances of the pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ParameterDeclaration>,
     #[doc = "List of the topology source nodes. Source nodes enable external data to be ingested by the pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sources: Vec<SourceNodeBase>,
     #[doc = "List of the topology processor nodes. Processor nodes enable pipeline data to be analyzed, processed or transformed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub processors: Vec<ProcessorNodeBase>,
     #[doc = "List of the topology sink nodes. Sink nodes allow pipeline data to be stored or exported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sinks: Vec<SinkNodeBase>,
 }
 impl PipelineTopologyProperties {
@@ -1603,7 +1636,11 @@ pub struct SpatialAnalysisPersonCountZoneEvents {
     #[doc = "Describes the named polygon."]
     pub zone: NamedPolygonBase,
     #[doc = "The event configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SpatialAnalysisPersonCountEvent>,
 }
 impl SpatialAnalysisPersonCountZoneEvents {
@@ -1700,7 +1737,11 @@ pub struct SpatialAnalysisPersonDistanceZoneEvents {
     #[doc = "Describes the named polygon."]
     pub zone: NamedPolygonBase,
     #[doc = "The event configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SpatialAnalysisPersonDistanceEvent>,
 }
 impl SpatialAnalysisPersonDistanceZoneEvents {
@@ -1724,7 +1765,11 @@ pub struct SpatialAnalysisPersonLineCrossingLineEvents {
     #[doc = "Base class for named lines."]
     pub line: NamedLineBase,
     #[doc = "The event configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SpatialAnalysisPersonLineCrossingEvent>,
 }
 impl SpatialAnalysisPersonLineCrossingLineEvents {
@@ -1831,7 +1876,11 @@ pub struct SpatialAnalysisPersonZoneCrossingZoneEvents {
     #[doc = "Describes the named polygon."]
     pub zone: NamedPolygonBase,
     #[doc = "The event configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SpatialAnalysisPersonZoneCrossingEvent>,
 }
 impl SpatialAnalysisPersonZoneCrossingZoneEvents {
diff --git a/services/svc/videoanalyzer/src/package_preview_1_1_0/models.rs b/services/svc/videoanalyzer/src/package_preview_1_1_0/models.rs
index 5b05377d84..5a5955dc3c 100644
--- a/services/svc/videoanalyzer/src/package_preview_1_1_0/models.rs
+++ b/services/svc/videoanalyzer/src/package_preview_1_1_0/models.rs
@@ -64,10 +64,18 @@ pub struct DiscoveredOnvifDevice {
     #[serde(rename = "remoteIPAddress", default, skip_serializing_if = "Option::is_none")]
     pub remote_ip_address: Option<String>,
     #[doc = "An array of hostnames for the ONVIF discovered devices that are in the same subnet as the IoT Edge device."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub scopes: Vec<String>,
     #[doc = "An array of media profile endpoints that the ONVIF discovered device supports."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub endpoints: Vec<String>,
 }
 impl DiscoveredOnvifDevice {
@@ -79,7 +87,11 @@ impl DiscoveredOnvifDevice {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct DiscoveredOnvifDeviceCollection {
     #[doc = "An array of ONVIF devices that have been discovered in the same subnet as the IoT Edge device."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<DiscoveredOnvifDevice>,
 }
 impl DiscoveredOnvifDeviceCollection {
@@ -648,7 +660,11 @@ impl LivePipelineActivateRequest {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct LivePipelineCollection {
     #[doc = "List of live pipelines."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<LivePipeline>,
     #[doc = "A continuation token to be used in subsequent calls when enumerating through the collection. This is returned when the collection results won't fit in a single response."]
     #[serde(rename = "@continuationToken", default, skip_serializing_if = "Option::is_none")]
@@ -719,7 +735,11 @@ pub struct LivePipelineProperties {
     #[serde(rename = "topologyName", default, skip_serializing_if = "Option::is_none")]
     pub topology_name: Option<String>,
     #[doc = "List of the instance level parameter values for the user-defined topology parameters. A pipeline can only define or override parameters values for parameters which have been declared in the referenced topology. Topology parameters without a default value must be defined. Topology parameters with a default value can be optionally be overridden."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ParameterDefinition>,
     #[doc = "Current pipeline state (read-only)."]
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -1071,7 +1091,12 @@ pub struct NodeInput {
     #[serde(rename = "nodeName")]
     pub node_name: String,
     #[doc = "Allows for the selection of specific data streams (eg. video only) from another node."]
-    #[serde(rename = "outputSelectors", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "outputSelectors",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub output_selectors: Vec<OutputSelector>,
 }
 impl NodeInput {
@@ -1157,7 +1182,12 @@ pub struct OnvifDevice {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub dns: Option<OnvifDns>,
     #[doc = "An array of of ONVIF media profiles supported by the ONVIF device."]
-    #[serde(rename = "mediaProfiles", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "mediaProfiles",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub media_profiles: Vec<MediaProfile>,
 }
 impl OnvifDevice {
@@ -1202,10 +1232,20 @@ pub struct OnvifDns {
     #[serde(rename = "fromDhcp", default, skip_serializing_if = "Option::is_none")]
     pub from_dhcp: Option<bool>,
     #[doc = "An array of IPv4 address for the discovered ONVIF device."]
-    #[serde(rename = "ipv4Address", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv4Address",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv4_address: Vec<String>,
     #[doc = "An array of IPv6 address for the discovered ONVIF device."]
-    #[serde(rename = "ipv6Address", default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        rename = "ipv6Address",
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub ipv6_address: Vec<String>,
 }
 impl OnvifDns {
@@ -1513,7 +1553,11 @@ impl PipelineTopology {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct PipelineTopologyCollection {
     #[doc = "List of pipeline topologies."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<PipelineTopology>,
     #[doc = "A continuation token to be used in subsequent calls when enumerating through the collection. This is returned when the collection results won't fit in a single response."]
     #[serde(rename = "@continuationToken", default, skip_serializing_if = "Option::is_none")]
@@ -1568,16 +1612,32 @@ pub struct PipelineTopologyProperties {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub description: Option<String>,
     #[doc = "List of the topology parameter declarations. Parameters declared here can be referenced throughout the topology nodes through the use of \"${PARAMETER_NAME}\" string pattern. Parameters can have optional default values and can later be defined in individual instances of the pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub parameters: Vec<ParameterDeclaration>,
     #[doc = "List of the topology source nodes. Source nodes enable external data to be ingested by the pipeline."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sources: Vec<SourceNodeBase>,
     #[doc = "List of the topology processor nodes. Processor nodes enable pipeline data to be analyzed, processed or transformed."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub processors: Vec<ProcessorNodeBase>,
     #[doc = "List of the topology sink nodes. Sink nodes allow pipeline data to be stored or exported."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub sinks: Vec<SinkNodeBase>,
 }
 impl PipelineTopologyProperties {
@@ -1680,7 +1740,11 @@ impl RemoteDeviceAdapter {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize, Default)]
 pub struct RemoteDeviceAdapterCollection {
     #[doc = "An array of remote device adapters."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub value: Vec<RemoteDeviceAdapter>,
     #[doc = "A continuation token to use in subsequent calls to enumerate through the remote device adapter collection. This is used when the collection contains too many results to return in one response."]
     #[serde(rename = "@continuationToken", default, skip_serializing_if = "Option::is_none")]
@@ -2101,7 +2165,11 @@ pub struct SpatialAnalysisPersonCountZoneEvents {
     #[doc = "Describes the named polygon."]
     pub zone: NamedPolygonBase,
     #[doc = "The event configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SpatialAnalysisPersonCountEvent>,
 }
 impl SpatialAnalysisPersonCountZoneEvents {
@@ -2198,7 +2266,11 @@ pub struct SpatialAnalysisPersonDistanceZoneEvents {
     #[doc = "Describes the named polygon."]
     pub zone: NamedPolygonBase,
     #[doc = "The event configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SpatialAnalysisPersonDistanceEvent>,
 }
 impl SpatialAnalysisPersonDistanceZoneEvents {
@@ -2222,7 +2294,11 @@ pub struct SpatialAnalysisPersonLineCrossingLineEvents {
     #[doc = "Base class for named lines."]
     pub line: NamedLineBase,
     #[doc = "The event configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SpatialAnalysisPersonLineCrossingEvent>,
 }
 impl SpatialAnalysisPersonLineCrossingLineEvents {
@@ -2329,7 +2405,11 @@ pub struct SpatialAnalysisPersonZoneCrossingZoneEvents {
     #[doc = "Describes the named polygon."]
     pub zone: NamedPolygonBase,
     #[doc = "The event configuration."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub events: Vec<SpatialAnalysisPersonZoneCrossingEvent>,
 }
 impl SpatialAnalysisPersonZoneCrossingZoneEvents {
diff --git a/services/svc/webpubsub/src/package_2021_10_01/models.rs b/services/svc/webpubsub/src/package_2021_10_01/models.rs
index cb952fe583..6215f6e895 100644
--- a/services/svc/webpubsub/src/package_2021_10_01/models.rs
+++ b/services/svc/webpubsub/src/package_2021_10_01/models.rs
@@ -28,7 +28,11 @@ pub struct ErrorDetail {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub target: Option<String>,
     #[doc = "An array of details about specific errors that led to this reported error."]
-    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        default,
+        deserialize_with = "azure_core::util::deserialize_null_as_default",
+        skip_serializing_if = "Vec::is_empty"
+    )]
     pub details: Vec<ErrorDetail>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub inner: Option<InnerError>,